Some standard content:
IC'S 23.100.30
Machinery Industry Standard of the People's Republic of China
JB/T10372-2002
Hydraulic fluid pressure relay
Hydraulic fluid pressure relay2002-12-27Promulgated
2003-04-01Implementation
Promulgated by the State Economic and Trade Commission of the People's Republic of ChinaForeword
2 Normative references
3 Abbreviations and general terms
4. Quantity, symbol and unit
5 Marking and labeling,
Basic parameters.
Core technical requirements,
General requirements,
Performance requirements
b.5 Installation requirements
6.4 Appearance requirements.
Performance methods
Test equipment
Test items and test methods
Table and appearance inspection
Test specifications
Test classification
Definition rules
10 Labeling, packaging, transportation and storage,
List A (Specification Appendix) Test circuit and characteristic line A, 1 Flow test line
A.2 Performance test line,
Figure A. Schematic diagram of test circuit
Adjusting pressure-sensitivity collinearity
Adjusting force-weight error curve
Deleted pressure! Leakage please measure the line
Visual test system standard diagram
Figure AG device state characteristics front line.
Table 1 Embedding, calculation and unit.
Table 2 This solution is for cleanliness standard...
Average display value of resistance parameter Allowable range of variation: Table 4 Allowable system error of measurement system.
Table 5 Factory inspection items and test methods
Table 6 Type test items and test methods
Table 7 Assembly and appearance inspection method,
JB/T:10372—2002
JB/T10372——2002
Appendix A of this standard is normative appendix
This standard is proposed by China Machinery Industry Federation. Foreword
This standard is issued by the National Hydraulic and Pneumatic Standardization Technical Committee. The drafting units of this standard are: Shanghai Pressure Reducing Pneumatic Corporation. Beijing Machinery City Industrial Automation Research Institute, Shanghai Hydraulic Parts Manufacturing Co., Ltd.
The main drafters of this standard are: Wu Dong, Sun Lianxin, Chao Shoulin, Qian Yan, Xi Guanjiao, Zhang Qianlong, and this standard is published in its entirety.
1 Scope
Hydraulic pressure relay
JB/T10372—2002
This standard specifies the basic parameters, technical requirements, test methods, inspection rules and markings, packaging, transportation and storage requirements of hydraulic pressure relays (hereinafter referred to as pressure electrical appliances). This standard is applicable to frequency-connected and plate-connected pressure pumps with hydraulic oil or other liquids of equivalent performance as the working medium.
2 Normative references
The provisions in the following referenced documents may become the final clauses of this standard. For all expired parts, all subsequent amendments (excluding error-prone items) or revised versions are not necessarily applicable to this standard. However, the parties who reach or discuss this standard may study whether the latest versions of these documents can be used: For all undated referenced documents, the latest version shall apply to this standard. G/T786.1 Compressor and pneumatic dynamic diagram symbols GB/T78f.! 199s, eJ5o1219-1:11, Fluidpowcrsy51emsHrulcomgaens—Geaphic symbois atd circuri disgtams—Purt f:Graphie symbuis) GRT2346 Tunnel compressor station system and optical parts nominal pressure square series GR/T2528 Compulsory batch inspection count extraction procedure and batch column table (applicable to detailed batch inspection) GB 2878 Full pressure component screw connection oil! : Type and size GB/T7935 Hydraulic component pressure technical conditions GBT8101 Hydraulic valve installation surface (CB/TR1D12002, ISO264:1998, Hydraulic pressure-relicf valves-mounting surfaces, Mou) GB/14D39-2002 Leakage transmission oil solid particle pollution level code (3O4406:1999, MOD GB/T7446 Gas transmission system and component terminology (GB/T17446-1996, ISO505598.1985: GDT1749 Pressure drive inspection pollution Analysis of contamination from: Extraction of liquid from pipes in the system (GB/T17489-1908, idtISO4021:1992)
3 Water terms and definitions
Terms and definitions established in GB/176 apply to this standard. Quantity, symbol and unit
Quantity, symbol and unit are shown in the table!
Nominal social
Volume flow rate
Inner diameter of pipe
Quantity, symbol and unit
B/T10372-2002
Pressure, oil quality, blood pressure, etc.
Multiple viscosity and elastic modulus
Method: M--—anti-and: L-
5 marks and basic dream number
5.1 mark
length: T
p, ap
time:
1【bag】
said degree,
FaiMPar
g (rnin)
A clear and permanent mark should be made on the product at the appropriate position. The content of the mark nameplate shall comply with the provisions of GB/T7935 and the requirements of GB/T78.5. 5.2 Basic parameters
The classification and parameters of positive pressure transformers include: nominal pressure, nominal diameter, pressure regulating range, etc. 6 Technical requirements
General requirements
6.1.1 The nominal pressure series shall comply with the provisions of GB/T2346. The type and size of the connection oil 1 shall comply with the provisions of GB257. 6.1.2
The installation surface of the loss-type connection shall comply with the provisions of GBT8101. 6.1.4 Other technical requirements shall comply with the provisions of GB/T7935. 6.1.5 The manufacturer shall 6.2 Performance requirements
The performance requirements of the pressure relay should include: Pressure stability:
Release accuracy:
Leakage resistance:
Action reliability
Transient switching performance:
Emittance: (Under rated conditions, there shall be no leakage at the static seal of the pressure relay, and no oil dripping at the dynamic seal: Stability: The pressure relay can withstand the high working pressure of 5 times without external damage and parts damage.
Durability: Under specified working conditions, the pressure relay should be able to withstand the specified number of operations, and there should be no abnormal damage or other forms of damage during operation. The decline in various performance indicators shall not exceed 10% of the specified value. 6.3 Assembly requirements
6.3.1 The assembly of the pressure relay shall comply with the provisions of GB/T7935. 6.3.2 The internal cleanliness of the pressure relay shall comply with the requirements in Table 2. 2 Internal cleanliness index
Nominal diameter mr
6.4 Appearance requirements
The external specifications of the pressure relay shall comply with the requirements of GB/T7935 7 Performance test method
7.1 Test volume
7.1.1 Test equipment The test bench shall have a test circuit in accordance with Appendix A Figure A, 1. 7.1.2 Flow of the independent source
The flow of the pressure source shall be adjustable and shall not exceed the test flow of the test piece. The three forces of the lubrication frequency can exceed the displacement pressure of the test piece by 20% to 30% in a short time. JB/T10372-2002
Cleanliness index
7.1.3 It is allowed to add pressure adjustment, flow rate or other working elements to the given basic circuit, which shall not affect the performance of the test piece.
7.1.4 The inner diameter of the test piece and the pipe joint shall be consistent with the actual diameter of the test piece. 7.1.5 Position of pressure measuring point
7.1.5.1 The inlet pressure measuring point shall be located between the downstream of the disturbance valve (such as the inner diameter of the pipe) and the downstream of the test piece: the distance from the disturbance valve shall not be less than 10 [the inner diameter of the pipe), and the distance from the test piece shall not be less than 7.1.6.2 The outlet pressure measuring point shall be located at least 10 downstream of the test valve. 7.5.3 When testing according to Class C selectivity, the pressure measuring points are allowed to be different from the above requirements, but the corresponding correction values should be given. 7.1.6 Measuring hole:
The true diameter of the measuring hole should not be less than 1mm and not less than 6mm2.16.13
The length of the measuring hole should not be less than 2 times the vertical line. 7.1.6.2
The axis of the measuring hole should be perpendicular to the axis of the pipe. The inner surface of the pipe and the measuring hole should have sharp edges and no burrs. The inner diameter of the connecting pipe between the measuring point and the measuring instrument should not be less than 7mm.7.1.6.4
7.1.6.5 When the pressure measuring point is connected to the measuring instrument, the air in the connecting pipe should be removed. 7.1.7 The temperature measuring point should be set at no more than 15 upstream of the measured point. 7.1.8 Sampling point of the oil filter should be set in the test circuit according to the provisions of GB/T17489. 7.2 Test conditions
7.2.1 Test medium
72.1.1 The test medium is pressurized oil.
7.2.1.2 Test medium temperature: Unless otherwise specified, type tests shall be conducted at 50°C ± 2°C, and factory tests shall be conducted at 50°C ± 4°C.
7.2.1.3 Test medium viscosity: The speed of motion at 40°C is 42mm*/5--74mm/s (special requirements shall be specified separately) 7.2.1.4 Test medium cleanliness: The oil concentration of the test system shall not be higher than the particle contamination level of GRT [4039- 20K02--/19/16,
7.2.2 Steady-state condition
The change of the displayed value of the controlled quantity is in accordance with the provisions of Article 3. It is considered as a state of energy. The value of the test number should be recorded under the steady-state condition
TB/10372-2002
Station change (Article
Generation: The accuracy can be passed through. 7.2.4
7.23 Transient condition
Table 3 Controlled quantity display value The display value of each dose accuracy calculation system is also for the controlled parameter V and the six-value light meter change range A
7.2.3.1 The test circuit is before the energy device 8 is exposed to the closed B
7.2.3.2 The oil cavity composed of the power supply and the relevant parts of the test circuit is composed of the product stiffness, the output change rate of the main force relay is within the range of 60OMPs-8COMP. Note: The output change rate is based on the plastic and the starting state area. If the positive force change is greater than 10% to 90% within the time limit,
7.2.3.3 The relative position between the pressure regulator and the pressure relay under test can be determined by controlling the pressure gradient between them: limiting the influence of oil properties can be used to determine the response time: The calculated positive force modulus should be at least 10% of the actual measured pressure modulus of the pressure relay under test:
Force modulus calculation formula:
In the formula:
The test starts at the set The gold sink through the chain flow valve 2 is: a sleeve of epidemic prevention and control body elasticity model: --- the test is the same as the test relay 4 and the step energy room (electromagnetic brush) between the circuit standard communication capacity 7.2.3.4 The operation time of the test circuit step loading river shall not exceed 10% of the effective test pressure relay 4 time, and the duration shall not exceed 1Dras.
7.2.4 Measurement accuracy level
The measurement accuracy level is divided into three levels: A, B, and C. The special test should not be lower than For the sub-level, the factory test shall not be lower than the C number, and the allowable system error of the measurement system corresponding to each number shall comply with the provisions of Table 1. Table 4 Allowable system error of the measurement system (Table 0.2MPa) Pressure! 0.2M: 7.3 Test items and test methods 7.3.1 The factory test shall be carried out in accordance with the approved laboratory for each product standard level. Electrical appliances: "Test items and test methods" table 5. 4 Test items H bzxZ.net
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Determination of teaching section
Hua Fu Xu Wei
Company price availability
7.3.2 Type test
5. Test items and test methods
Test methods
Each card oil port and oil tank seat
, test your type
with price The rate of 2% of the pressure-bearing port is as high as 1.5 readings of the oil port. After reaching the pressure-maintaining rate of 5 mis
, adjust the pressure of the tested electrical appliance 4 by hand, and then adjust the overflow by hand. The system gradually adjusts the pressure indicator 5 to the full value of the test pressure gauge 3. The pressure gauge 3 can be adjusted to the full value of the test pressure gauge 4. The pressure indicator 5 is powered on gradually, and the pressure gauge 3 can be adjusted to the full value of the test pressure gauge 4. If the reverse position is not less than three times, the pressure adjustment limit is used to adjust the pressure source, and the pressure is increased or decreased. The pressure of the pressure indicator 5 is powered on when the system is powered off. The percentage between the two is used to judge the test range. The number of records of the key device, the test shall not be less than three times, the serial number of the test, each drink sells the maximum pressure difference between the system pressure indicator table caused by the relative pressure of the upper limit of the adjustment range, that is, the whole test power of the electrical appliance 4 or complex recognition difference,
lake is tested for each other in the chain to reduce the limit value of the jade range, in the test for the chain electric strength leakage product leakage flux
adjustment test power of the electrical appliance 4 range of pressure adjustment city upper limit, the magnetic business 7 (1/5~1) H2 etc. continuous switching, the wide alarm or daily power selection of the electrical appliance, the break, all recorded. Repeated test of the type test items of the two-open relay group and the test method are connected to the table. Table 6 Type test items and test methods Test items Steady-state performance Test method JB/T10372-—2002 Upward test method Tester 4 elements Digital opening and closing relationship with closed type 1 That is, under the action of the same pressure, it is taken as the action quality indicator 5 of the device 4; for example, the same below.
The more sensitive the competition test, the more sensitive the test, the more sensitive the test force of the electrical appliance, the more sensitive the test force, and the more sensitive the test force. The more sensitive the test, the more sensitive the test force, and the more sensitive the test force. The more sensitive the test, the more sensitive the test, the more sensitive the test force, and the more sensitive the test force. From the lower limit to the upper limit, the number of function points read in the meantime should be sufficient to draw a leakage line: the leakage line of the pressure drop or the leakage line of the three-point force device (see A.4) JB/T10372—2002
Test items
Instant love objects
Assembly and appearance inspection
Table 6 missing)
Test method
Test system can see Figure A.5. The test method is as follows: Test the force chain charge 4 bases and monitor the upper limit of the diagram: operate the reversing diagram (the speed of operation should meet the requirements of this standard 7, 3.4), so that the system unloads the three times, and then cuts off the test force The reverse port of the spring device 4 generates a pressure that meets the instantaneous effect conditions of 7.2.3.2 of this standard. The pressure sensor 3 and the micro switch of the load-type output chain recorder 4 are used to record the pressure change process of the test pressure relay 4 and the on-off state of the micro switch. The on-time and off-time of the tested pressure medium 4 are connected to the upper limit of the voltage regulator (Figure A6). The average beat of (13--2 flashes) makes the electric commutation fall into the short circuit 7: record the action times of the tested pressure device 4. After reaching the number of actions specified by the durability index, check the life and performance of the tested pressure device 4. The assembly and appearance inspection method of the tested pressure device shall be in accordance with the provisions of the table: Table 9.1 Inspection classification Inspection items Assembly limit Internal slider External weakness Product inspection Product inspection and type inspection. 9.1.1 Factory inspection Inspection methods Test methods According to Table 2, the excitation method, the alcohol method, the factory inspection refers to the various control tests carried out before the product is delivered: the performance inspection items of the cabinet and the method are in accordance with the provisions of 3, and the performance requirements shall meet the requirements of 62: the assembly and appearance inspection method is in accordance with the provisions of Chapter 6.3, and the quality shall meet the requirements of 6.4 requirements. 9.1.2 Type inspection
Type inspection refers to the comprehensive assessment of the quality of the product. It is in accordance with the technical requirements of the standard for comprehensive inspection. If there are any other conditions, type inspection should be carried out:
a? Trial and final product identification for new products or old products transferred to other factories for production: b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance: C) After the product has been discontinued for a long time and is not in production: d) When the inspection results of the small factory are significantly different from the results of the previous type inspection: ") Letter to the owner, when there is no warehouse supervision agency to propose a type inspection requirement. The items and methods of performance inspection shall be in accordance with the provisions of 7.3.2. The performance requirements shall comply with the provisions of 6.2. Assembly and appearance The inspection method shall be in accordance with the provisions of Chapter 8: Quality inspection shall meet the requirements of 6.3 and 6.4. 9.2 Sampling The sampling plan for product inspection shall be in accordance with the provisions of GB/T2828. Plan: The sampling plan for quality inspection shall be in accordance with the relevant provisions of GB/T2828. 9.2.1 Inspection plan: a: Acceptable quality level (AQL value): 2.5 h! Sampling plan type: Upper corner inspection-secondary sampling plan: JE/T10372 ——2002
) Inspection level, general inspection level II: pressure resistance test sample size is 0.%, but not less than the internal unit: 9.2.2 Type inspection sampling
a) Qualified water: (AQL value: 2.5[6.5]: b) Holding type: positive belt inspection bending one-time sampling plan: sample size, 5 units [2 units]
Note: The standard instrument in the square pollution number is applicable to the previous long-term measurement test 9.2.3 Internal cleanliness inspection Inspection sampling
Quality level (AQL value): 3.5: b! Sampling plan type: Inspection sampling plan: Inspection level: Special inspection level -2.
9.3 Determination rules
According to GB/12828.
) Marking, packaging, transportation and storage
Label: Packaging, transportation and storage according to /T7935: Special requirements are stipulated in the regulations, 1
JE/T 10372-2002
A.1 Test circuit
Test circuit schematic diagram See Figure A.1
(Normative Appendix)
Test circuit and characteristic curve
1--Pressure reducing system, 2--Virtual light, 3--Square meter, 4--Test pressure drive, 5--Temperature gauge, 7--Solenoid reversing valve, K--Enabler, -1, 9-3--Filter, JU, Figure A.1 Test circuit schematic diagram See Figure A.1
4.2 Characteristic typical curve
A, 2.1 Adjustment force-sensitivity curve See Figure A.2.A.2.2 Adjustment pressure repeatability error typical curve See Figure A.3A.2.3 Adjustment pressure A.4 shows the leakage curve. A.5 shows the characteristic curve of the test system. A.6 shows the characteristic curve of the test system. A.3 shows the pressure adjustment curve. A.4 shows the pressure adjustment curve. A.5 shows the characteristic curve of the test system. A.6 shows the characteristic curve of the test system. T8/T10372—2002
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