Some standard content:
ICS17.220.20
Machinery Industry Standard of the People's Republic of China
JB/T5465.2-—2002
Replaces JB/T5465.2-1991
JB/T5465.3—1991
Components for energy meters
Magnetic bearing assembly
Magnetic bearing assembly for energy metersPublished on December 27, 2002
Implementation on April 1, 2003
Published by the State Economic and Trade Commission of the People's Republic of ChinaForeword,
2 Normative references
3 Terms and definitions,
4 Classification..…
Useful environment conditions
Model naming method.
Structural requirements.
Drag torque during bearing operation
Performance against impact of current
Performance against impact of external magnetic field
Performance against impact of climate environment
Performance against mechanical performance
Stability
Reliability.
Test methods
Appearance inspection
Coaxiality inspection
Guide pin inspection
Magnet inspection
Load-bearing distance inspection.
Displacement limit inspection
Gap cleanliness inspection,
Drag torque test
Anti-impact current test
External magnetic field test
Weather resistance test,
Mechanical performance test
Stability test
Mark inspection.
Reliability test
Inspection rules.||t t||Inspection category.
Factory inspection.
Periodic inspection.
Type inspection
JB/T5465.2—2002
JB/T5465.22002
8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.2 Transportation and storage
Appendix A (Normative Appendix) Magnets in magnetic bearings A. 1 Classification and model naming method
A.1.1 Classification,
A.1.2 Model naming method
A.2 Requirements and inspection methods
Magnet shape and position tolerance, surface roughness
Magnetic strength of magnet
Pressure resistance
Collision resistance
Surface quality..…
Surface coating
Magnetic properties,
Inspection rules.
Inspection category
Factory inspection
A.3.3 Periodic inspection
A.3.4 Type inspection.
A.4 Marking, packaging, transportation and storage
A.4.1 Marking, packaging
A.4.2 Transportation and storage,
Appendix B (Normative Appendix) Inspection items, unqualified categories and inspection categories of magnets, Appendix C (Normative Appendix) Inspection items and unqualified categories of magnetic bearing assembliesn
JB/T5465 "Components for Electric Energy Meters" is divided into 3 parts: Part 1: Terminal box types and dimensions:
Part 2: Magnetic bearing assemblies:
Part 4: NdFeB permanent magnet brake assemblies. JB/T5465.2--2002
This part replaces JB/T5465.2-1991 "Magnetic thrust bearing aluminum nickel drill magnetic ring for electric meter parts" and JB/T5465.3--1991 "Magnetic thrust bearing ferrite magnetic ring for electric meter parts". Compared with JB/T5465.2-1991 and JB/T5465.3-1991, the main changes of this part are as follows: Revision of the scope of application: The standard applicable to the magnetic thrust bearing aluminum nickel drill and ferrite magnetic ring for electric energy meter is revised to the standard applicable to the magnetic thrust bearing assembly and magnetic suspension bearing assembly for single-phase and three-phase active and reactive electric energy meter composed of permanent magnetic materials (1991 edition 1: this edition 1):
-Added the classification and structural requirements of magnetic bearing assemblies, focused on the overall performance requirements and stipulated feasible test methods, and the magnetic thrust bearing assembly The types and specifications of components and magnetic suspension bearing assemblies are not specified (4-6 of this edition); - The requirements for the guide pins of the components are added (5.1.3 of this edition): Regarding the revision of the magnetic ring standard: All kinds of magnetic rings are collectively referred to as permanent magnets, and their types and specifications are not specified. Their technical requirements, test methods and inspection rules are placed in Appendix A (3-7 of the 1991 edition: Appendix A1A4 of this edition): This part will replace the original standards JB/T5465.2--1991 and JB/T5465.3-1991 from the date of implementation. Appendix A, Appendix B and Appendix C of this part are normative appendices. This part is proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Electrical Instruments. Drafting units of this part: Hangzhou Permanent Magnet Group Co., Ltd., Shanghai Infute Electronic Technology Co., Ltd., Harbin Electric Instrument Research Institute, Huali Group Co., Ltd., Zhengtai Group Zhejiang Zhengtai Instrument Co., Ltd., Ningbo Samsung Group Co., Ltd., Harbin Lihua Magnetic Bearing Co., Ltd.
Main drafters of this part: Xue Dejin, Ling Quan, Fang Jiliu, Li Yan, Fu Bo. The previous versions of the standards replaced by this part are: JB/T5465.2-1991;
—JB/T5465.3-1991.
1 Scope
Components of Magnetic Bearing Assembly for Electric Energy Meter
JB/T5465.2-2002
This part specifies the definition, classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of magnetic bearing assembly (hereinafter referred to as bearing) for electric energy meter. This part applies to magnetic thrust bearing assemblies and magnetic suspension bearing assemblies for single-phase and three-phase active and reactive energy meters made of permanent magnetic materials.
2 Normative references
The clauses in the following documents become the clauses of this part through reference in this part of JB/T5465. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to an agreement based on this part are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version applies to this part.
GB/T1800.3-1998 Limits and basis of fit Part 3 Standard tolerances and basic deviations numerical tables (cqvISO286-1:1988) Environmental testing for electric and electronic products Test A: Low temperature (idtEC60068-2-1:1990) GB/T2423.1—2001
GB/T2423.2--2001
60068-2-2:1974)
GB/T2423.4—1993
60068-2-30:1980)
Environmental testing for electric and electronic products Part 2: Test methods Test B: High temperature (idtEC Basic environmental testing procedures for electric and electronic products Test Db: Cyclic damp heat test method (eqvECGB/T 2423.51995
5 Environmental testing for electric and electronic products Part 2: Test methods Test Ea and guidance: Impact (idtEC60068-2-27:1987)
GB/T2423.10—1995
(idtIEC60068-2-6:1982)
GB/T2423.17—1993
60068-2-11:1981)
GB/T 2423.33-1989
(negDIN50018:1978)
Environmental testing for electric and electronic products Part 2: Test methods Test Fc and guidelines: Vibration (sinusoidal) Basic environmental testing procedures for electric and electronic products Test Ka: Salt spray test method (eqyEC Basic environmental testing procedures for electric and electronic products Test Kca: High concentration sulfur dioxide test method GB/T28281987
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Periodic inspection counting sampling procedures and sampling tables (applicable to production process stability inspection) GB/T28291987J
GB/T15464--1995 General technical conditions for instrument packaging GJB1912-1994 Permanent magnet surface magnetic field uniformity test method JB/T5467.2-1 2002 Electromechanical AC active and reactive energy meters Part 2: Special requirements for long-life technology energy meters JB93291999 Instrumentation and transportation, transportation and storage basic environmental conditions and test methods JB/T50070-2002 Reliability requirements and assessment methods for energy meters 3 Terms and definitions
The terms and definitions established in JB/T5467.2-2002 and JB/T50070-2002 and the following terms and definitions apply to this part. 3.1
Magnetic bearings magnetic bearing assembly for energy meters JB/T5465.2-2002
A bearing consisting of a fixed and movable permanent magnet system and a guide system. The magnetic fields generated by the magnets of the magnetic system interact with each other to produce an axial force, which is balanced by the gravity of the movable part of the electric energy meter connected to the movable magnet, so that the two magnets maintain a certain distance without contact, so that the movable part of the electric energy meter can rotate around the axis of the guide system. 3.2
Magnetic bearings magnetic bearing assembly for repulsion type (magnetic repulsion bearing) A magnetic bearing in which the two magnetic poles facing each other in the magnetic bearing mainly produce axial repulsion force. 3.3
Magnetic bearings magnetic bearing assembly for suspension type (magnetics suspension bearing) A magnetic bearing in which the two magnets facing each other in the magnetic bearing mainly produce axial attraction force. 3.4
Drag torque Tadrag torque for rotation (Ta) is the torque that prevents the electric energy meter turntable from rotating due to the friction of the bearing system and the uneven magnetic field on the pole surface. 3.5
Load-bearing distance hdistance between both the moveable and the fitted rings for suspension is the distance between the two closest axial surfaces of the movable and fixed magnets under the specified load-bearing conditions. For magnets placed up and down, it is the distance between the two opposite pole surfaces; for magnets placed inside and outside, it is the axial distance between the upper surfaces of the inner and outer magnetic rings. 4 Classification
4.1 Classification
4.1.1 Classification by use
a) Magnetic bearings for single-phase electric energy meters:
b) Magnetic bearings for three-phase electric energy meters.
4.1.2 Classification by structure
Integral magnetic bearings;
Split magnetic bearings.
4.1.3 Classification by magnetic force form
Magnetic thrust bearing;
Magnetic suspension bearing.
4.1.4 Classification by resistance torque
a) Class A, Ta is less than or equal to 0.4μN·m; b) Class B, Ta is less than or equal to 0.6uN·m: c) Class C, Ta is less than or equal to 0.8μN·m: d) Class D, Ta is less than or equal to 1.2μN·m; 4.2 Environmental conditions for use
4.2.1 Temperature
Reference temperature: 23℃±2℃:
Working temperature range: -25℃～55℃:
Limit temperature range: -40℃～70℃:
Transportation storage temperature: -40℃～70℃.
4.2.2 Relative humidity
Annual average: 75%:
30 days in a year (distributed in a natural way): 95%: The rest of the time sometimes reaches: 85%.
4.3 Model naming method
5 Requirements
5.1 Structural requirements
JB/T5465.2—2002
Feature code (the first digit is the outer diameter or external thread diameter of the bearing: the second digit is the resistance torque classification number)
Structure (Z: integral type: F: split type) Application (D: single-phase electric energy meter: S: three-phase electric energy meter) Material, form (SD: drill magnetic suspension: LD: aluminum-nickel drill magnetic suspension: TD: ferrite magnetic suspension: ST: drill magnetic push: LT: aluminum-nickel drill magnetic suspension: TT: ferrite magnetic push) 5.1.1 The appearance of the bearing should be smooth, the plating should be complete and not fall off, the outer diameter size shall be determined by the contract between the supply and demand parties, and the tolerance of the outer diameter size shall comply with the requirements of IT8 of GB/T1800.3—1998. 5.1.2 The coaxiality between the outer cylindrical surface of the bearing and the guide pin should not be greater than 75um. 5.1.3 The guide pin should be made of stainless steel with a hardness of HV ≥ 680, and the surface roughness of the contact surface between the guide pin and the guide ring should be better than 0.1μm.
5.1.4 The magnet should be made of permanent magnetic materials such as aluminum nickel cobalt, cobalt, ferrite, etc., and the requirements are shown in A.2 of Appendix A (Normative Appendix). 5.1.5 After the bearing is magnetized and subjected to magnetic stabilization treatment, the load-bearing distance between the magnets generated under the gravity of the specified movable part of the electric energy meter should be h ± 0.075mm, where h is the load-bearing distance specified by both the supply and demand parties. 5.1.6 When the magnetic suspension bearing is displaced 1.5mm axially downward from the normal position under the gravity of the specified movable part, it should not fall off from the fixed magnet
5.1.7 There should be no dust, iron filings, magnet fragments and other debris in the gap between the bearing magnets. 5.2 Resistance torque of the bearing during operation
Resistance torque of the bearing during operation:
Class A, T. should not be greater than 0.4μN·m:
Class B, T. should not be greater than 0.6JN·m;
Class C, Ta should not be greater than 0.8uN·m:
Class D, Ta should not be greater than 1.2μN·m.
5.3 Impact current resistance performance
The bearing should be able to withstand the impact current test of 6.9, and the irreversible change of the load-bearing distance caused by this should not be greater than 0.03mm. 5.4 External magnetic field resistance performance
The irreversible change of the load-bearing distance caused by the bearing undergoing the 16kA/m external magnetic field test should not be greater than 0.01mnl. 5.5 Performance of withstanding the influence of climate and environment
After the bearings are subjected to the environmental tests in 6.11.1, 6.11.2, 6.11.3, 6.11.4 and 6.11.5, they shall not produce rust, mildew and other phenomena, nor produce defects that affect normal operation.
5.6 Mechanical performance
After the bearings are subjected to the mechanical performance test in 6.12 under working conditions, they shall not be damaged, have defects that affect normal operation, and their performance shall not be reduced.
5.7 Stability
After the high temperature test at 100℃ and 48h, the change in the bearing distance of the bearing assembly shall not exceed 0.03mm. 5.8 Reliability
After the bearing assembly runs at a speed of 50r/min for 8760h, the change in the resistance torque of the bearing assembly shall not exceed 50% of the provisions in 5.2. 3
JB/T5465.2-2002
6 Test methods
6.1 Appearance inspection (5.1.1)
Visually inspect the appearance performance, and use an outside micrometer to inspect the outside diameter size and tolerance. 6.2 Coaxiality inspection (5.1.2)
Install the bearing to be inspected on a special inspection fixture, rotate the bearing, and use a projector to inspect the coaxiality of the outer cylindrical surface of the bearing and the guide pin. For integral bearings, the joint sleeve should be disassembled for inspection. 6.3 Guide pin inspection (5.1.3)
Visually inspect, and use a permanent magnet to inspect its magnetism; use a microhardness tester to apply a 2N pressure to inspect the hardness of the guide pin; use the interference method or sample comparison method to measure the roughness.
6.4 Magnet test (5.1.4)
For magnet test, see A.26.5 Bearing distance test (5.1.5)
Install the bearing on the device shown in Figure 1 and inspect it with a microscope with a minimum scale of 0.001mm. For integral bearings, the joint sleeve should be removed for inspection: For magnetic suspension bearings, the disk position should be measured, and the disk should be pushed to the upper limit position before measurement, and the distance should be calculated.
Active rod; 2—upper magnet: 3-
6.6 Displacement limit test (5.1.6)
Lower magnet: 4-
Microscope,
Install the magnetic suspension bearing on a special test stand, measure the disk position, and then slowly pull the disk down 1.5mm to observe whether it will fall off from the fixed magnet. The test stand shall be equipped with a vertical scale with a graduation of 0.01 mm. 6.7 Clearance cleanliness test (5.1.7)
Visual inspection. For integral bearings with opaque outer sleeves, the sleeves shall be disassembled for inspection. 6.8 Resistance torque test (5.2)
Carry out the test in accordance with the method for measuring average angular acceleration specified in 6.12.5.1 of JB/T5467.2-2002. 6.9 Impact current resistance test (5.3) A coil with an inner diameter of @30mm and a total of 10 turns is made of 1.5mm×5.5mm enameled copper wire. The current core of the electric energy meter is inserted into it. The assembly is connected to a high current device to generate a pulse current of 6000A and maintain it at 3000A for 1ms. The bearing is then placed at the front, back, left, right, top and bottom positions 15mm away from the coil for a shock current resistance test. After the test, the change in its load-bearing distance is measured using the same method as 6.5. 6.10 Test for influence of external magnetic field (5.4)
Place the bearing at the center of the plane of a toroidal coil with a diameter of 1m and composed of 4 turns of @16mm wire. The coil is passed with 4000A, 50Hz alternating current. The test time is 1s, and the change in the load-bearing distance is measured using the method in 6.5. 6.11 Weathering environment test (5.5)
6.11.1 Low temperature test (5.5)
Perform the test in accordance with the provisions of GB/T2423.1-1989. The test conditions are as follows:
-40℃±3℃, 16h.
JB/T5465.2—2002
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.2 Dry heat test (5.5)
Perform the test in accordance with the provisions of GB/T2423.2-1989. The test conditions are as follows: 70℃±2℃, 72h.
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.3 Cyclic damp heat test (5.5)
The test is carried out in accordance with the provisions of GB/T2423.4-1993, and the test conditions are as follows; Upper limit temperature: 55℃±2℃;
Test time: 6 cycles:
Variation form: 1.
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation.
Appearance evaluation requirements:
a) The key parts of the moving parts and other parts (or parts) that can affect the performance of the product shall not show corrosion damage: b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.4 Salt spray test (5.5)
Perform a 96-hour 5% salt spray test in accordance with the provisions of GB/T2423.17-1993. After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation. Appearance evaluation requirements:
a) The key parts of the moving parts and other parts (or parts) that can affect the performance of the product shall not show corrosion damage; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.5 Sulfur dioxide test (5.5)
Perform the test in accordance with the provisions of GB/T2423.33-1989. The test conditions are: the volume concentration of sulfur dioxide is: 20×10-°; 4 cycles, 96 hours.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base frame, install the movable parts of the electric energy meter, and conduct the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
-Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Continuously impact three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T28281987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Sampling and judgment principles for type inspection
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity:
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.10 External magnetic field influence test (5.4)
Place the bearing at the center of the plane of a toroidal coil with a diameter of 1m and composed of 4 turns of @16mm wire. The coil is passed through 4000A, 50Hz AC. The test time is 1s. Measure the change of the load-bearing distance according to the method in 6.5. 6.11 Weather resistance test (5.5)
6.11.1 Low temperature test (5.5)
Perform the test according to the provisions of GB/T2423.1-1989. The test conditions are as follows:
-40℃±3℃, 16h.
JB/T5465.2—2002
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter to operate and observe whether there are any defects that affect normal operation. 6.11.2 Dry heat test (5.5)
Perform the test in accordance with the provisions of GB/T2423.2-1989. The test conditions are as follows: 70℃±2℃, 72h.
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.3 Alternating damp heat test (5.5)
Perform the test in accordance with the provisions of GB/T2423.4-1993. The test conditions are as follows; Upper limit temperature: 55℃±2℃;
Test time: 6 cycles:
Variation form: 1.
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation.
Appearance evaluation requirements:
a) The key parts of the moving parts and other parts (or parts) that can affect the performance of the product shall not show corrosion damage: b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.4 Salt spray test (5.5)
Perform a 96-hour 5% concentration salt spray test in accordance with the provisions of GB/T2423.17-1993. After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation. Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect product performance shall not be corrosive; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.5 Sulfur dioxide test (5.5)
The test shall be carried out in accordance with the provisions of GB/T2423.33-1989. The test conditions are: the volume concentration of sulfur dioxide is: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base, install the movable parts of the electric energy meter, and conduct the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Impact three times continuously in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T2828-1987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Type inspection sampling and judgment principles
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity:
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.10 External magnetic field influence test (5.4)
Place the bearing at the center of the plane of a toroidal coil with a diameter of 1m and composed of 4 turns of @16mm wire. The coil is passed through 4000A, 50Hz AC. The test time is 1s. Measure the change of the load-bearing distance according to the method in 6.5. 6.11 Weather resistance test (5.5)
6.11.1 Low temperature test (5.5)
Perform the test according to the provisions of GB/T2423.1-1989. The test conditions are as follows:
-40℃±3℃, 16h.
JB/T5465.2—2002
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter to operate and observe whether there are any defects that affect normal operation. 6.11.2 Dry heat test (5.5)
Perform the test in accordance with the provisions of GB/T2423.2-1989. The test conditions are as follows: 70℃±2℃, 72h.
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.3 Alternating damp heat test (5.5)
Perform the test in accordance with the provisions of GB/T2423.4-1993. The test conditions are as follows; Upper limit temperature: 55℃±2℃;
Test time: 6 cycles:
Variation form: 1.
After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation.
Appearance evaluation requirements:
a) The key parts of the moving parts and other parts (or parts) that can affect the performance of the product shall not show corrosion damage: b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.4 Salt spray test (5.5)
Perform a 96-hour 5% concentration salt spray test in accordance with the provisions of GB/T2423.17-1993. After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are any defects that affect normal operation. Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect product performance shall not be corrosive; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.5 Sulfur dioxide test (5.5)
The test shall be carried out in accordance with the provisions of GB/T2423.33-1989. The test conditions are: the volume concentration of sulfur dioxide is: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base, install the movable parts of the electric energy meter, and conduct the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Survive three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T28281987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Sampling and judgment principles for type inspection
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity:
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.2-1989, the test conditions are as follows: 70℃±2℃, 72h.
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.3 Alternating damp heat test (5.5)
The test is carried out in accordance with the provisions of GB/T2423.4-1993, and the test conditions are as follows: upper limit temperature: 55℃±2℃;
Test time: 6 cycles:
Variation form: 1.
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation.
Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect the performance of the product shall not be subject to corrosion damage; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.4 Salt spray test (5.5)
Perform a 96-hour 5% concentration salt spray test in accordance with the provisions of GB/T2423.17-1993. After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are defects that affect normal operation. Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect the performance of the product shall not be subject to corrosion damage; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.5 Sulfur dioxide test (5.5)
The test is carried out in accordance with the provisions of GB/T2423.33-1989. The test conditions are: the volume concentration of sulfur dioxide is: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base frame, install the movable parts of the electric energy meter, and carry out the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
-Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Continuously impact three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T28281987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Type inspection sampling and judgment principles
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity:
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.2-1989, the test conditions are as follows: 70℃±2℃, 72h.
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation. 6.11.3 Alternating damp heat test (5.5)
The test is carried out in accordance with the provisions of GB/T2423.4-1993, and the test conditions are as follows: upper limit temperature: 55℃±2℃;
Test time: 6 cycles:
Variation form: 1.
After the test, place it under normal conditions for 24h, visually inspect the appearance, and operate it on the electric energy meter to observe whether there are any defects that affect normal operation.
Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect the performance of the product shall not be subject to corrosion damage; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.4 Salt spray test (5.5)
Perform a 96-hour 5% concentration salt spray test in accordance with the provisions of GB/T2423.17-1993. After the test, place it under normal conditions for 24 hours, visually inspect the appearance, and install it on the electric energy meter for operation to observe whether there are defects that affect normal operation. Appearance evaluation requirements:
a) The key parts of moving parts and other parts (or parts) that can affect the performance of the product shall not be subject to corrosion damage; b) The corrosion damage area of other exposed parts (or parts) other than the parts in item a) above shall not exceed 5% of the main surface area of the part.
6.11.5 Sulfur dioxide test (5.5)
The test is carried out in accordance with the provisions of GB/T2423.33-1989. The test conditions are: the volume concentration of sulfur dioxide is: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base frame, install the movable parts of the electric energy meter, and carry out the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
-Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Continuously impact three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T28281987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Sampling and judgment principles for type inspection
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity: bzxZ.net
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.33-1989, the test conditions are: volume concentration of sulfur dioxide: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base frame, install the movable parts of the electric energy meter, and conduct the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
-Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Continuously impact three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T28281987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classification of non-conformities, see Appendix C (Normative Appendix). 7.4 Type inspection
7.4.1 Type inspection items
Type inspection items are inspections of all items of this standard on a small number of samples, and are carried out in one of the following situations: when new products are trial-made and finalized for production when they are transferred to other factories; a)
After the formal production of the product, the process has changed significantly, which may affect the product performance; b)
c) When the product is stopped for more than six months and resumes production; d) When the superior quality department conducts quality supervision and inspection. 7.4.2 Sampling and judgment principles for type inspection
The samples for type inspection are sent by the manufacturer from qualified products, and the number of samples is 12. The judgment principles are the same as those for periodic inspection. For classification of non-conformities, see Appendix C (Normative Appendix).
Note: Unless otherwise specified, repeated non-conformities in the same item of the same sample are counted as one. According to the qualified and unqualified numbers, the qualified judgment number A in the sampling plan and the unqualified judgment number R are used to determine whether the inspection is qualified. 8 Marking, packaging, transportation and storage
8.1 Marking, packaging
8.1.1 Each certain number of bearings is a small package, and each small package should be accompanied by a certificate of conformity, which should be marked with: product name, model:
Manufacturer name, trademark:
Product quantity:
Inspector code or stamp:
Inspection date.
Several small packages are packed into a medium package, and the medium package should have the following marks: a)
Product name:
Manufacturer name, trademark, address, telephone: Quantity:
d) Quality:
Packing date.
8.2 Transportation and purchase and storage
Bearings are allowed to be transported in various ways under reasonable packaging. JB/T5465.2—2002
Bearings should be stored under proper packaging conditions, the storage warehouse should be clean, the relative humidity should not exceed 85%, and the air should not contain gases that are sufficient to cause corrosion.33-1989, the test conditions are: volume concentration of sulfur dioxide: 20×10-°; 4 cycles, 96h.
Appearance evaluation requirements:
Same as 6.11.4.
6.12 Mechanical resistance test (5.6)
6.12.1 Impact test (5.6)
Install the bearing assembly on the corresponding electric energy meter base frame, install the movable parts of the electric energy meter, and conduct the test in accordance with the provisions of GB/T2423.51995. The test conditions are as follows:
-Peak acceleration: 30g (300m/s2): Impact time: 18ms:
Continuously impact three times in each direction of the three mutually perpendicular axes. 6.12.2 Vibration test (5.6)
Install the bearing assembly on the corresponding watt-hour meter base frame, install the movable parts of the watt-hour meter, and conduct the test in accordance with the provisions of GB/T2423.10-1995. The test conditions are as follows:
-Test procedure: A;
-Frequency range: 10Hz~150Hz:
-Crossover frequency: 60Hz:
JB/T5465.22002
≤60Hz
Constant amplitude 0.075mm;
Constant acceleration 9.8m/s2 (1g) at >60Hz; Single point control:
Number of frequency sweep cycles in each axial direction: 10.
Note: 10 frequency sweep cycles are 75min.
After the test, run the bearing on the electric energy meter to observe whether there are any defects that affect normal operation. And carry out the tests and inspections of 6.2, 6.5 and 6.6. 6.13 Stability test (5.7)
The bearing is subjected to a high temperature test in a high temperature box at 100℃ for 48 hours. After the test, it is placed under normal conditions for 24 hours and the bearing load distance is measured. The method is the same as 6.5.
6.14 Mark inspection (8.1)
Visual inspection.
6.15 Reliability test (5.8)
After the test is carried out according to the test conditions specified in 5.8, the resistance torque of the bearing system is measured according to the method of 6.12.5.1 of JB/T5467.2--2002 and compared with the measured data in 6.8.
7 Inspection rules
7.1 Inspection categories
Inspection is divided into three types: factory inspection, periodic inspection and type inspection. 7.2 Factory inspection
is an inspection conducted by the inspection department of the manufacturer on the products leaving the factory. 5.1.1, 5.1.6 (only applicable to magnetic suspension bearings) and 8.1 are fully inspected; 5.1.2, 5.1.3, 5.1.4, 5.1.5, 5.1.7 (see Appendix C (Normative Appendix)) are sampled and tested according to the one-time sampling plan of GB/T2828-1987ⅡL=IⅡ, AQL=1.5. 7.3 Periodic inspection
Periodic inspection is a regular inspection during normal production, which is carried out once a year. The inspection samples are selected from the qualified products in the warehouse according to GB/T2829-1987DL=II, Class B unqualified RQL=25, Class C unqualified RQL=50RQL=25, n=12A=1,R=2: RQL=50, n=12A=4,R. =5) is carried out according to the one-time sampling plan. For periodic inspection items and classificat
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