Some standard content:
[CS37.026
Machinery Industry Standard of the People's Republic of China
JB/T 9870—1999
Hydraulic dynamometer
Hydraulic dynamometer
1999-09-17 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9870-1999
This standard is a subscription to ZBJ91.009—89 Hydraulic dynamometer". Compared with ZBJ91009-59, this standard mainly revise and supplement the following contents: speed measurement accuracy requirements: speed measurement accuracy test: static torque sensitivity test: endurance test: inspection rules: appearance requirements of the whole machine; add Appendix A "Water dynamometer reliability assessment and evaluation" and Appendix 2 "friction type classification". This standard replaces Appendix A and Appendix B of ZBJ91009-89 standard from the date of implementation. This standard is proposed by the National Internal Combustion Engine Standardization Technical Committee and is the original unit of this standard: Qidong Dynamometer Factory, Shanghai Internal Combustion Engine Research Institute. The main drafters of this standard are Wu Qisheng. Chen Hui, Li Hui, Gu Jinyu, Guan Zhiping, Shi Junga. This standard was first issued in 1981 and revised for the first time in 1989. Scope
Machinery Industry Standard of the People's Republic of China
Hydraulic dynamometer
Hydreulic dynamomeler
JE/T9870-1999
Generation 2BJ91009
This standard specifies the technical requirements, test methods and inspection rules of hydraulic dynamometer (hereinafter referred to as dynamometer): as the technical basis for the acceptance of dynamometer manufacturing, etc.
2 Referenced Standards
The following standards contain the following prohibitions, which constitute the text of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should discuss the possibility of using the latest version of the standard at that time. GA191—1990
GET133061991
JBT 52201991
3 Definitions
This standard adopts the following definitions:
3.1 Storage control (opening)
Packaging storage and transportation graphic display
Speed digital display
Control of the dynamometer's speed changing with the speed without any feedback control. 3.2 Constant speed regulation
Control of keeping the prime mover speed at any given speed. 3.3 Torque regulation
Control of keeping the dynamometer at any given torque. 3.4 Transfer half force regulation
Control of making the dynamometer's braking torque change with the square of the speed. 3.5 Speed ratio regulation
Control of making the dynamometer's braking torque change with the speed ratio. 3.6 Static torque sense (principle, sensitivity) The minimum torque that can make the dynamometer's rotation indicating device (or bit meter) produce a detectable change. 4 Product model compilation method
4.1: The dynamometer number is expressed in double-added phonetic letters (hereinafter referred to as letters) and Arabic numerals (hereinafter referred to as numbers), and is composed of the following three parts in sequence:
Approved by the State Machinery Industry Corporation on September 17, 1999 and implemented on January 1, 2000
Example 1: DI10
JB/T 987-1999
variant symbol [indicated by the letter] working capacity symbol (using numbers to indicate the maximum absorbed power) structural category symbol (D-pin type: P-disk type: Y-blade type! Indicates a pin-type dynamometer with a maximum absorbed power of 1100 kW. Example 2: D260-S
indicates a pin-type dynamometer with a maximum absorbed power of 260%, S indicates digital torque, Example 3: P1500
indicates a net-disk dynamometer with a maximum absorbed power of 1500 kW. Example 4: Y120
indicates a blade-type dynamometer with a maximum absorbed power of 120 kw. . 5 Technical requirements
5.1 The dynamometer product shall be made in accordance with the product drawings and technical documents approved by the prescribed process. 5.2 The manufacturer shall provide the following main technical specifications and data of the dynamometer in the technical documents: a) Model:
b) Maximum yield, kw:
c) Spindle maximum speed, Timin;
d Spindle rotation direction;
e) Maximum braking force, N·m; Braking force rating, N:
f Maximum water consumption, Lh:
g) Maximum drain temperature, T:
h) Rotation speed, kg, m: ||tt ||) Axle center height, mm:
J) Overall dimensions (length × weight × height), mm: k) Net mass (excluding electronic control device), mm) Total mass (net mass + electronic control device) g5.3 The main engine of the measuring machine should be able to work normally under the following conditions: a) Ambient temperature: 0-50℃:
b) Relative humidity: ≤85%:
c) Sea level: ≤3000m;
d) Power supply: AC voltage 220V±10%: Rated frequency 50Hz±1%: e) Cooling water inlet temperature: ≤32:
JB/T9870-1999||t The dynamometer shall be fixed on a firm foundation, and the installation location shall be free from the gas system, vibration and electric field, and free from the existence of unique gas and dust. 5.4 The dynamometer shall have the following adjustment types (selected by the door 15.4.1 Position control (open loop) 5.4.2 Constant torque regulation, 5.4.3 Rotational adjustment, 5.4.4 Rotational control, 5.4.5 Rotational proportional control, 5.5 Adjustment error 5.5.1 Torque adjustment error: not more than ±2% of the dynamometer value. 5.5.2 Constant speed adjustment error: not more than = 5r/mm 5.5.3 Speed regulation error: in accordance with the square characteristic. 5.5.4 Rotational proportional adjustment error: shall comply with the proportional characteristic. 5.6 Test error
5. (. Speed measurement error
When the speed is less than or equal to 1000 rimin, the error is not greater than T ± 1 rimin; when the speed is greater than 1 Hoorimim, the error is not greater than u.1% ± "digit of the maximum speed range of the dynamometer. 5.6.2 The static torque measurement error should not be greater than ± 0.4% of the torque reported by the dynamometer. 5.7 Under the condition that the water temperature is not higher than 70, the dynamometer should be able to operate smoothly. 5.8 The dynamometer should be tested During the no-load running test, all parts should work normally and no abnormal sound should be made. 5.9 The static torque of the instrument should not exceed 0.2% of the measuring range. 5.10 Assembly quality
5.10.1 Mechanical part
5.0.1.1 The rotating parts of the instrument should be tested and the results should meet the requirements of the product drawings. 5.10.1.2 The cones at both ends of the shaft should match the coupling, and the connection area should be not less than 70%. 5.10.1.3 No water leakage is allowed at the joints of the sealing surfaces. 5.10.1.4 The explosion door should be flexible to open and close, and work reliably. 5.10.1.5 The scale plate should be engraved with clear and conspicuous fonts. 5.10.1. The dynamometer parts should be anti-rust treated according to the product drawing requirements. 5.10.1.7 The dynamometer coating, delamination, and chemical treatment surface should be smooth and even, and there should be no obvious defects such as delamination, bubbles, or cracks. 5.10.2 Electronic control part
5.10.2.1 The dynamometer electronic control device should be 5.10.2.2 The insulation resistance of the power input circuit to the machine element of the control part shall not be less than 2M9. 5.10, 2.3 The switches and buttons of the electronic control device shall be flexible: they shall move freely and shall not be loose. All the plug points shall be flexible. 5.10.2.4 The wiring of the electronic control device shall be neat and beautiful: the printed circuit board shall be clean, the solder joints shall be smooth, and there shall be no defects such as pressure welding and finger welding. 5.10, 2.5 The electronic control device must have a grounding mark. 3
5. 11 Warranty period
JB/E9870-1999
The warranty period of the dynamometer shall comply with the relevant provisions of the manufacturer's three guarantees. 6 Test method
The inspection disk, gauge, code, meter, etc. shall be qualified by the relevant measurement department and within the validity period. 6.1 Test conditions and test equipment:
a) Water supply pressure: 40-250kPa:
b) Pressure fluctuation range: ±5kpa;
) Code: accuracy is 5/100000;
d) Calibration value: storage length ±1mm/10mm: e) Speed and torque display;
Variable speed power machine and other parts.
6.2 Test
6.2. "Idle running test
Run at 50% of the highest speed for 5min, and run at 0% of the highest speed for 2min. All parts should work properly. There should be no abnormal sound.
2. 2 Rotation measurement error test
Should comply with the provisions of JB/T5220
6.2.3 Torque static measurement relative error test 6.2.3.1 Equal position adjustment
Before the calibration test, install it horizontally and then adjust it to zero position. 6.2.3.2 Static torque measurement Relative benefit test Use static force method to test, disconnect the dynamometer from the power machine, at the specified force point in one direction of rotation of the dynamometer, add the maximum range value of the code from point to point, and then add the code from the maximum range value to point. There shall be no less than five measuring points in each measurement range, and the structure shall be evenly distributed. The load cannot be unloaded during the addition, and the load cannot be increased. Repeat the test twice: or the above test is repeated from one rotation to the next. The format of the test record table is shown in Table 1.
6.1.4 Static torque sensitivity test
When the dynamometer is in the full range without adding code, gradually add code on the base plate until the pointer or digital display of the indicating device changes significantly to north. The percentage of the ratio of the weight of the applied code and the length of the force applied to the full-scale torque is called the torque sensitivity test record table format. See Table 2. 6. 2. 5 Balance test
The rotor parts of the test unit shall be tested for dynamic balance on the dynamic balancing machine according to the product sample requirements. 6.2. Joint area inspection
The chain surfaces at both ends of the main shaft are matched with the coupling curtain, and the contact area is tested by the coloring method. 6. 2. 7 Sealing inspection
Check whether there is any water or oil leakage at the joint of the sealing surface. Filter model,
B9870-29
Table! Torque static measurement test record table (clockwise or counterclockwise rotation) factory number:
load or potential kg
(silicon quantity)
turn gauge value
running value
relative error
torque position
absolute error
relative error
running short diameter
running value error
and value error
absolute error
running value error
: Absolute error = measured value - theoretical value
Relative error = running error / maximum process] %5
Table 2 Static torque sensitivity test record table
Factory number:
Test date:
Test date:
Transfer cabinet Wa
Additional teaching and protection
6.2.8 Xie Guang [Operation inspection
JB/T9870-1999
Operate by hand, and the closing should be flexible and reliable. G.2.9: Insulation resistance detection of electrical control part should be checked with megohmmeter as required. 6.2.10 The appearance inspection of mechanical and electrical control parts should be checked according to the requirements of 5.10.1.5~5.10.1.7, 5.10.2.3~5.10.2.5, and checked by visual tracing and by sense. 6. 3 Performance test
6.3.1 The manufacturer may conduct performance test on samples of products that have passed the regular factory test as required by the user (it is allowed to be combined with the user test), and take several torque values at different speeds. The format of the test record table is shown in 3, 6.3, 2 Adjustment characteristic test
According to the adjustment mode selected by the user from 5.4, the test is also carried out to check whether the error does not meet the requirements of 55: Table 3 Performance test record table
Power model:
Only Xinjiang model
Environmental humidity:
Test has been marked||tt ||6. Durability test
Number,
Waterproof
Factory number:
Manufacturer:
E Temperature
Water inlet pressure
The manufacturer should periodically conduct durability tests on any sample of the products shipped out of the factory, and it is allowed to be combined with user use tests. After the durability test, the performance test in 6.3 should be carried out. After the test, the stability of various indicators such as the reliability and wear resistance of the components shall be: the cumulative continuous test time shall not be less than 2000h. After the test, the test unit shall be shipped out. The test report shall be written based on the test results. The validity period of the test report is 5 years.
6.5 Reliability assessment indicators are shown in Table 4.
Assessment indicators
Average 1 operation before total failure
(MTYFF!
Average time between failures
(MTEF)
JBT98701999
Table 4 Reliability assessment indicators
Qualified products
6.6 The evaluation method for the special test of the belt is shown in Appendix A (Appendix 6 of the standard). For the classification of failure modes, see Appendix B [Standard Appendix) Inspection rules
7.1 Each dynamometer must be inspected and qualified by the manufacturer's quality inspection department and issued with a certificate before it can leave the factory. 7.2 Delivery inspection items shall be carried out in accordance with 6.2.
8 Type test
.1 Type test shall be carried out in any of the following situations: a) When a new product is put into production for technical appraisal; b) After formal production, if there are major changes in structure, materials, processes, etc., which may affect the main performance of the product; c) When the product is discontinued for 3 years and resumed; d) When the national quality supervision agency proposes a type test requirement. Info.2 Type test items shall be carried out in accordance with 6.2, 6.3, G.4, and 6.5. 9 Labeling, packaging, transportation, storage
Production labels shall be fixed on the product and the labels shall comply with the provisions of BT13306. 9.1 The dynamometer label shall indicate at least: a) manufacturer name, measurement license number, trademark; h) product model and name; c) maximum power, kW; d) maximum speed, rpm; 3) serial number; e) manufacturing date (year, month, day). 9.2 Spraying shall be performed before packing. 9.3 The materials and structures used for the packaging box shall be firm and prevent wind, sand and rain from penetrating. The packaging method specified in the contract between the supply and demand parties may also be adopted. The packaging box shall comply with the provisions of GB19. 9.4 The installed tester and its accessories, instruments, scales, parts and tools can be reliably fixed in the packing box to prevent damage from mutual collision.
9.5 The outside of the packing box shall be marked with at least:
a) Factory name;
b) Product name and model:
c) Overall dimensions (length x width x height) in mm
d) Gross weight, kg:
c) Shipping address and consignee:
Factory number and date:
JB/T 9870—1999
) Samples or signs such as "on", "do not turn upside down", "handle with care", "moisture-proof", "starting from here" etc. 9.6 The following documents are provided randomly:
) Product certificate:
b) Packing list:
) Instruction manual and other documents.
9.7 Necessary accessories and tools shall be provided along with the dynamometer. 9. The dynamometer and random instruments, meters, accessories, spare parts, and tools shall have anti-rust and anti-operation measures. Under the conditions of proper storage, custody and transportation, no rust, malfunction, etc. shall occur within 6 months from the date of leaving the factory. JB/T9870-1999
Appendix A
[Appendix to the standard]
Method for reliability assessment and evaluation of hydraulic dynamometer The reliability of dynamometer products shall be tested through three aspects: bench reliability test, on-site reliability test and user survey. A1 Bench reliability test test This indicator
a) Average working time before the first failure is calculated according to the formula (AI: MTTFF =
Wu City:
The number of test prototypes;Www.bzxZ.net
The number of failures that occurred during the first test, not including minor failures! The cumulative working time when the first failure occurred on the normal prototype, (
The working time of the first prototype without failure during the test period (including the running-in and performance test period), the product's M value is calculated by the product of the test time and the test machine: aThe average failure time between the two is calculated by the formula (^2): MTBF-
I Two: T-a certain time cut-off test time, h;-a total number of failures that occurred on the prototype during the test period (including the running-in and performance test period) (subtotal minor failures), -: When the test bench is tested, the MTDF value of the product is calculated by the formula A2.1. The reliability test is carried out in the actual use of the product under the supervision of a dedicated person. A2.2 Before the test, an on-site reliability test outline should be formulated. A2.3 All dynamometer failures and faults found during the test shall be accompanied by a report of the improvement of the application technology. A2.4 The assessment indicators are the mean half working time before the first failure (MTTFF) and the mean time to failure (MTDF). A2.5 Test method
A2.5 Test time and number of units: 1MMh/unit × 2 units A2.5.2 Test specification
According to the example in Table A1. The T condition evaluation is carried out repeatedly, and the T condition repetition time is not more than 2m. Table A】
502nam
condition cycle table
: drivability test is carried out by the dynamometer using the dynamometer type monitoring method: when the user is in use, the actual drivability of the dynamometer should be investigated, the main failure modes that occur during use should be eliminated, and the average working time before the first failure of the product should be calculated. A3.2 The user survey results should be written into a user survey report. Appendix B
【Standard Appendix】
Failure mode classification
Based on the degree of damage caused by the dynamometer, or the degree of serious damage and the overall difficulty of the dynamometer, the faults are divided into four categories: failure, serious failure, general failure and minor failure. B Fatal failure [category]
refers to the failure of the dynamometer that causes personal death or major economic losses. For example: the fixed column is loose, the coupling is in contact and the load is high. B2 Serious fault (Class II) refers to the fault that the dynamometer performance exceeds the specified value, the main parts are damaged, or the fault needs to be disassembled to eliminate, such as: static torque error, speed measurement error, static torque sensitivity error, rotor assembly, etc. B3 Major fault [Class] refers to the fault that requires shutdown for inspection and replacement of major parts, and can be eliminated by random tools, such as: major parts casting defects, oil leakage, water leakage, etc. Minor fault [Class V] refers to the fault that does not cause shutdown, does not require replacement of parts, and can be eliminated in a short time with random tools. Such as slight separation, loosening of non-important parts. B5 Fault mode classification See reference 01 for fault mode classification
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