Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/ 50013—2000
Rolling Bearing
Life and Reliability Test Procedure
(Internal Use)
2000-04-24 Issued
National Bureau of Machinery Industry
2000-10-01 Implementation
JB/T 50013—2000
This standard is a revision of JB/T 50013—94. Foreword
Compared with JB/T50013—94, this standard mainly makes the following modifications: - Reclassification of the test:
I Supplement and explain some clauses of the test conditions; Standardize the test data processing method, cancel the content of data sample management, etc.: - Adjust the content and format of the test result analysis and inspection report. This standard replaces 3B50013--94 from the date of implementation. Appendix A of this standard is the appendix of the standard. This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The responsible drafting unit of this standard is Luoyang Bearing Research Institute. The main drafters of this standard are Tang Jie, Zhang Wei, Wu Xiuli and Zhang Hongyou. 1 Scope
Mechanical Industry Standard of the People's Republic of China
Rolling Bearing
Life and Reliability Test Procedure
(Internal Use)
JB/T 50013--2000
Replacement JB/T 30013~-94
This standard specifies the procedures for conducting routine life and reliability tests on general-purpose rolling bearings on a testing machine. This standard is applicable to the life and reliability tests of rolling bearings with an inner diameter of 10~120mm. 2 Referenced Standards
The provisions contained in the following standards constitute the text of this standard by reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB/T 275--1993
Fitment of rolling bearings with shafts and housings
GB/T6391-1995 Rated dynamic load and rated life of rolling bearingsJB/T50093-1997 Test and evaluation method for life and reliability of rolling bearingsSH/T0017-1990
3 Symbols and abbreviations
Bearing oil
S: Internal axial force of the bearing caused by equivalent radial dynamic load F:7: Proportional coefficient, =S/F:
n: Test speed, r/min;
: Speed coefficient;
: Life coefficient;
V: Weibull distribution characteristic life:
b: Weibull distribution slope:
LnBasic rated life, h (or million revolutions)Lt: Test value of basic rated life, h (or million revolutions);K: Life ratio, K=La Lp
R: Test value of reliability, R =exp[-(L\]4 Test classification
According to the test purpose, it can be divided into identification test, acceptance test or verification test. In the test, the sample is usually subjected to the truncation test method, such as timed truncation, fixed number truncation, sequential truncation, etc. 4.1 Bearing identification test
For the identification or quality comparison test of new materials and new structures, the test method of timed or fixed number truncation should be adopted: Approved by the State Bureau of Machinery Industry on April 24, 2000 and implemented on October 1, 2000
4.2 Bearing acceptance test or verification test
JB/T50013-2000
For the acceptance test or verification test of bearing subscribers, the sequential truncation test method should be adopted. 5 Test conditions
5. 1 Testing machine
The bearing testing machine must be a test machine that meets the relevant standards and has passed the appraisal. 5.1 Selection of testing machine
The same batch of test samples should be tested on a testing machine with the same structural performance under the same test conditions. 5.3 Selection of bearing fit
5.3.1 The fit between the bearing, shaft and housing shall be as specified in Table 1. 5.3.2 For test conditions with large radial loads, the bearing and shaft should be appropriately stacked while ensuring the working clearance of the bearing. The excess of fit between the bearing and the shaft is used to prevent relative sliding between the inner ring of the bearing and the shaft during operation. Table 1 Fit between bearing, shaft and housing
Fit all
Fit between bearing and shaft
Fit between bearing and outer ring
Bearing type
Ball bearing
Roller bearing
Thrust bearing (single direction)
Radial bearing
Thrust bearing
Bearing light series
8. 9. 0. 1
Partial series
All series
All series
1 In the fit, the limit deviation of the shaft and housing hole shall comply with the provisions of Appendix A of GB/T275--1993. 2 The fit in the fit is determined by the inner ring of the bearing bearing bearing cyclic (rotational) load and the outer ring bearing local load. 5.4 Bearing outer ring degree
When grease lubrication is used, it is not allowed to exceed 80℃; when oil lubrication is used, it is not allowed to exceed 95℃. 5.5 Bearing speed
nms,m6
6,p6
The speed of the inner ring generally does not exceed 60% of the bearing limit speed. The specific value of the speed is selected according to the speed meter data of the test machine itself. 5.6 Bearing lubrication
5.6.1 Circulating oil lubrication uses L-FC type 32 oil that complies with SH/T0017-1990. Regularly check the viscosity and impurities of the oil. 5.6.2 The particles of dust and mechanical impurities in the oil should not be larger than 3μm. A special oil filter should be used to reduce the impurity content in the oil: 5.6.3 The circulating oil supply should comply with the provisions of Table 2. Table 2 Circulating oil supply quantity
Bearing nominal inner diameter d
>30~60
>60-120
Ring oil supply cover
5. Bearing load
5. 7. 1 Calculation of L
JB/T50013-2000
The calculation of the rated dynamic load and rated life of the bearing shall comply with the provisions of GB/T 6391. 5.7.2 Selection of L
Based on L (C/P), the equivalent dynamic load P is taken as about 1/4 of the basic rated dynamic load during the test; for test pieces with larger axial load F, the value may be appropriately increased; for test pieces that only bear radial load F, when the stiffness and deflection of the test shaft system permit, P may also be appropriately increased.
When the test shaft specification is confirmed, you can first select Chu and n to obtain P; you can also first select n and P to obtain Lio. 5.7.3 Load calculation procedure
5. 7.3.1 For Lj0 in hours (h), P = (optimal) × C, where C, f and f shall all comply with relevant regulations. 5.7.3.2 For radial bearings, when only bearing radial load F, the maximum load P = F. S.7.3.3 For thrust bearings, when only bearing axial load F, the equivalent load P-F 5.7.3.4 For angular contact bearings, when bearing combined loads, the load distribution shall be carried out according to formula (1): P- XF + YF -
where the values of and Y shall comply with relevant regulations. However, the load distribution shall also meet the following two conditions: a) M- (F-SVF
a≤20°M-0.25;α>200,M=0.5
Contact angle.
b)SF, value is as specified in Table 3.
Table 3 Values
Angular contactbzxZ.net
Ball bearing
Sub bearing
n=1(2Y)
For ease of use, the above two conditions can be converted into: P
X+r(M.+n)
F= F,(M+ n)
6 Test preparation
6.1 Sample preparation
6. t.1 Sample extraction
From the batch of products that have been accepted, products with the same process and specifications should be randomly selected, and the sample inspection should comply with the provisions of the relevant standards.
6. 1.2 Small sample size
The sample size is small, generally 10~20 sets are taken. When the test cycle is required to be short, the sample size can be taken as the upper limit, 6.t.3 Numbering
JB/T50013-2000
Generally, the numbering is on the non-reference surface of the ring. Bearings with an inner diameter d≤20mm can be numbered on the outer circle or other parts. Both the inner and outer rings of the separable bearing should be numbered.
6.7 Test head assembly
6.2.1 The test head refers to a whole composed of the test spindle, load body, left and right bushings, left and right flanges, disassembly rings, isolation rings, left and right rotating locking nuts on the shaft ends, load bearings, etc. 6.2.2 All parts of the test head shall comply with the requirements of the drawing. 6.2.3 The assembled test head shall comply with the requirements of the national assembly sample. 6.2.4 After the test head is assembled with the fuselage, all systems (load transfer, lubrication, transmission, etc.) should be checked to ensure that they function normally. 6.3 Testing machine debugging
6.3.1 The error of the load applied by the testing machine should be controlled within the range of ±2%. A 1.5-level pressure gauge should be used for oil pressure loading, and a 0.4-level precision force gauge should be pre-calibrated. The 0.4-level precision pressure gauge should be calibrated regularly. 6.3.2 The circulating oil circuit should be kept unobstructed, and the oil supply pressure lamp should not be less than 0.25MPa. 6.3.3 The speed error should be controlled within the range of ±2%. The tachometer should be calibrated regularly. 6.3.4 The stamping method should be used to check the joint between the lower plane of the loading piston head and the concave surface of the load body. The contact should be smooth and normal, and the piston should move flexibly.
6.3.5 After installation, there should be no obstruction or abnormality when dragging the belt by hand. 6.3.6 The electrical system should be safe and reliable.
7 Test process
7.1 Failure criteria
7.1.1 Fatigue failure
The base metal peeling with a certain depth and area occurs on the working surface of the rolling element or ring of the test bearing. It is stipulated that the shaving area of the ball bearing shall not be less than 0.5mm2; the shaving area of the roller bearing shall not be less than 1mm2; the depth shall not be less than 0.05mm. 7.1.2 Other failures
Any part of the test bearing is damaged, so that it cannot operate normally, such as the cage is broken, the sleeve is loose, the sealing element is deformed, and it does not have a sealing function.
7.2 Test machine start-up, shutdown and loading procedures 7. 2.1 Grease lubrication
After the test machine is started, it should be operated without load for 0.5h. After heating, it should be gradually loaded to the specified value during the 3h operation process and the temperature rise should be closely observed.
7.2.2 Oil lubrication
7.2.2.1 When the test bearing has no axial load, start the oil pump motor first, then start the main motor, and finally increase the load to the specified value gradually; when stopping, first unload, stop the main motor, and finally stop the oil pump.
7.2.2.2 When the test bearing has an axial load, when it is subjected to a combined load, start the oil pump motor first, then add a small amount of axial load (1/3~1/2 of the specified value), then start the main motor, increase the axial load to the specified value, and then increase the radial load to the specified value; when stopping, proceed in reverse order. 4
7.3 Test monitoring
JB/T50013—2000
The test machine is in continuous operation. The test (load, speed, oil pressure, vibration, noise, temperature rise, etc.) should be monitored and controlled at any time. Record the temperature once every 2 hours according to Table A1 in Appendix A (Appendix to the standard) as the basis for the test passing time. If it is less than 2h, write it directly in Table A1 with numbers.
8 Test result analysis and test report
8.! Failure products caused by inappropriate test load, abnormal speed, lack of oil supply, burning and jamming shall not be included in the normal failure data
8.2 If required, failure analysis of typical plastic failure products can be carried out according to relevant regulations. 8.3 When recording the original test data (total time of the test), it is advisable to retain one significant digit. 8.4 Process the test data according to JB/T50093 and issue an inspection report. The inspection report format is in accordance with Table A2 in Appendix A. When necessary, the estimated results should be attached and the corresponding distribution parameter values should be marked. To ensure the estimation accuracy, probability paper with a format of not less than 16 should be used. 41
Original records
See Table A1 for the original records.
Inspection unit
Specification model
Inspection number
Equipment number
Scheduled test time
JB/T50013-2000
Appendix A
(Appendix for standard)
Life and reliability test records and reports
Rated life
Radial charge loading
Grid load
Test speed
Start-up time
Temperature and time
Shutdown time
Test life
Failure state
Shutdown situation
Shutdown spray cause
A2 Inspection report
Inspection report see Table A2 .
Report No.
Specification Model
Inspected Unit
Dimensions
Tolerance Grade
Production Period
Inspection Date
Inspection Location
JB/T50013-2000
Product Name
Inspection Category
Detailed Address
Sampling Method| |tt||Sampling location
Sampling base
Number of samples
Batch sampling date
Sampler
Inspection basis
Issue date
Total 3 pages
(Special seal for inspection report]
Page 1
Inspected unit:
Specification model:
Test starts in H period
J8T 500132000
Table A2 (continued)
Tolerance grade:
Dynamic load/rated dynamic load
Radial load (F.)
Axial load (F.)
Test speed (n)
Basic rated life [L]
Lubrication and cooling
1. See page 3 of this table for the original test data
Result of data processing:
Test value of basic rated life L, =
Life ratio K = L
Reliability R of Lm, -%
Overall dimensions:
Report number:
(The above values, when r>5, are obtained by circling and estimating the two parameters 6 and V)Test end date
Page 2
Inspected unit:
Specification wall number:
Sample number
JB/T S0013—2000
Table A2 (end)
Tolerance grade:
Test passing time
Overall dimensions:
Report number:
Failed parts
Total 3 pages
Page 3! Products that fail due to inappropriate test load, abnormal speed, lack of oil supply, burning and jamming shall not be included in the normal failure data.
8.2 When required, failure analysis can be carried out on typical plastic failure products in accordance with relevant regulations. 8.3 When recording the original test data (total time of the test), it is advisable to retain one significant digit. 8.4 Process the test data in accordance with JB/T50093 and issue an inspection report. The inspection report format is in accordance with Table A2 in Appendix A. When necessary, the estimated results should be attached and the corresponding distribution parameter values should be marked. To ensure the accuracy of the estimation, probability paper with a format of not less than 16K should be used. 41
Original records
See Table A1 for the original records.
Inspection unit
Specification model
Inspection number
Equipment number
Scheduled test time
JB/T50013-2000
Appendix A
(Appendix for standard)
Life and reliability test records and reports
Rated life
Radial charge loading
Grid load
Test speed
Start-up time
Temperature and time
Shutdown time
Test life
Failure state
Shutdown situation
Shutdown spray cause
A2 Inspection report
Inspection report see Table A2 .
Report No.
Specification Model
Inspected Unit
Dimensions
Tolerance Grade
Production Period
Inspection Date
Inspection Location
JB/T50013-2000
Product Name
Inspection Category
Detailed Address
Sampling Method| |tt||Sampling location
Sampling base
Number of samples
Batch sampling date
Sampler
Inspection basis
Issue date
Total 3 pages
(Special seal for inspection report]
Page 1
Inspected unit:
Specification model:
Test starts in H period
J8T 500132000
Table A2 (continued)
Tolerance grade:
Dynamic load/rated dynamic load
Radial load (F.)
Axial load (F.)
Test speed (n)
Basic rated life [L]
Lubrication and cooling
1. See page 3 of this table for the original test data
Result of data processing:
Test value of basic rated life L, =
Life ratio K = L
Reliability R of Lm, -%
Overall dimensions:
Report number:
(The above values, when r>5, are obtained by circling and estimating the two parameters 6 and V)Test end date
Page 2
Inspected unit:
Specification wall number:
Sample number
JB/T S0013—2000
Table A2 (end)
Tolerance grade:
Test passing time
Overall dimensions:
Report number:
Failed parts
Total 3 pages
Page 3! Products that fail due to inappropriate test load, abnormal speed, lack of oil supply, burning and jamming shall not be included in the normal failure data.
8.2 When required, failure analysis can be carried out on typical plastic failure products in accordance with relevant regulations. 8.3 When recording the original test data (total time of the test), it is advisable to retain one significant digit. 8.4 Process the test data in accordance with JB/T50093 and issue an inspection report. The inspection report format is in accordance with Table A2 in Appendix A. When necessary, the estimated results should be attached and the corresponding distribution parameter values should be marked. To ensure the accuracy of the estimation, probability paper with a format of not less than 16K should be used. 41
Original records
See Table A1 for the original records.
Inspection unit
Specification model
Inspection number
Equipment number
Scheduled test time
JB/T50013-2000
Appendix A
(Appendix for standard)
Life and reliability test records and reports
Rated life
Radial charge loading
Grid load
Test speed
Start-up time
Temperature and time
Shutdown time
Test life
Failure state
Shutdown situation
Shutdown spray cause
A2 Inspection report
Inspection report see Table A2 .
Report No.
Specification Model
Inspected Unit
Dimensions
Tolerance Grade
Production Period
Inspection Date
Inspection Location
JB/T50013-2000
Product Name
Inspection Category
Detailed Address
Sampling Method| |tt||Sampling location
Sampling base
Number of samples
Batch sampling date
Sampler
Inspection basis
Issue date
Total 3 pages
(Special seal for inspection report]
Page 1
Inspected unit:
Specification model:
Test starts in H period
J8T 500132000
Table A2 (continued)
Tolerance grade:
Dynamic load/rated dynamic load
Radial load (F.)
Axial load (F.)
Test speed (n)
Basic rated life [L]
Lubrication and cooling
1. See page 3 of this table for the original test data
Result of data processing:
Test value of basic rated life L, =
Life ratio K = L
Reliability R of Lm, -%
Overall dimensions:
Report number:
(The above values, when r>5, are obtained by circling and estimating the two parameters 6 and V)Test end date
Page 2
Inspected unit:
Specification wall number:
Sample number
JB/T S0013—2000
Table A2 (end)
Tolerance grade:
Test passing time
Overall dimensions:
Report number:
Failed parts
Total 3 pages
Page 3
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