JB/T 8924-1999 Technical requirements for rolling bearings for railway locomotives
Some standard content:
ICS21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T89241999
Specifications of rolling bearings for railway locomotive
Technical conditions
Specifications of rolling bearings for railway locomotive1999-06-28 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB/T8924—1999
This standard is a revision of ZBJ11001-87 "Technical conditions for rolling bearings for railway locomotive". Compared with ZBJ11001, the main technical content of this standard has been changed as follows: 1. The bearing model has been revised;
1. Appendix B has been added.
This standard replaces ZBJI1001-87 from the date of implementation. Appendix A of this standard is the appendix of the standard.
Appendix B of this standard is a reminder appendix.
This standard is proposed and managed by the National Technical Committee for Standardization of Rolling Bearings. The drafting units of this standard are Luoyang Bearing Research Institute and Dalian Diesel Locomotive Research Institute of the Ministry of Railways. The main drafters of this standard are Li Dean, Quan Zhongtai and Chen Yuan. This standard was first issued in 1975. It was revised to GB1589-81 for the first time in 1981 and revised for the second time in 1987. This is the second revision.
1 Scope
Machinery Industry Standard of the People's Republic of China
Technical Conditions for Rolling Bearings for Railway Locomotive
Specifications of rolling bearings for railway locomotive JB/T8924-1999
Replaces ZBJ11001-87
This standard specifies the dimensions, technical requirements, inspection methods and inspection rules of rolling bearings for railway locomotives (hereinafter referred to as bearings).
This standard applies to production inspection by manufacturers and user acceptance. 2
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T307.1--1994
GB/T 307.2--1995
GB/T307.3-1996
GB/T308-1989
GB/T46611989
JB/T12551991
JB/T3016-1 991
JB/T3017—1991
JB/T30341993
JB/T3370—1991
JB/T3573—1993
JB/T3574—1997
JB/T 89211999
YB9—1968
3 Technical requirements
3.1 General technical requirements
Rolling bearings Radial bearing tolerances
Principles and methods of rolling bearing measurement and inspection General technical rules for rolling bearings
Rolling bearing steel balls
Rolling bearing cylindrical rollers
Technical conditions for heat treatment of rolling bearing parts made of high carbon chromium bearing steel Technical conditions for rolling bearing packaging nailboard boxes
Technical conditions for rolling bearing packaging cartons
Rolling bearing oil Sealed rust-proof packaging
Rolling bearingsUniversal jointsCylindrical roller bearings without inner ringsDimensions and tolerancesMethods for measuring and evaluating the radial clearance of rolling bearingsRolling bearing product markings
Inspection rules for rolling bearings and their commodity partsTechnical conditions for chromium bearing steel
3.1.1Technical requirements such as bearing tolerances shall comply with the provisions of GB/T307.1, GB/T307.3, JB/3370 and product drawings approved by the competent department of the manufacturer. The dimensions and tolerances of the rolling elements used in the bearings shall comply with the provisions of GB/308 or GB/T4661.Bearing dimensions, models, and radial clearance values are listed in Appendix A (Standard Appendix). 3.1.2 The working and mating surfaces of the bearing rings and rolling elements must be smooth and free of defects such as wear, scratches, pressure pits, rust, etc. For stamping and solid cages, pockets are not allowed to squeeze rolling elements; loose rivet heads, chiseling and misalignment of rivet heads, misalignment of two half cages, and obvious pressure and scratches are not allowed.
JB/T8924-1999
3.1.3 The inner chamfer of the locomotive axle box bearings, the axle bearings of the axle gearbox of diesel locomotives and electric passenger cars, and the connection between the inner ring chamfer and the inner cylindrical surface should have a smooth transition and no sharp edges.
3.1.4 Chrome plating is not allowed on the bearing mating surface. 3.1.5 Locomotive axle box bearings NNQP4232X2Q1/S0 and NNP4232X2Q1/S0. The fastening bolts of the cage shall not be loose, and the anti-loosening gasket shall be safe and reliable; the gasket shall not extend out of the outer plane of the cage after bending. 3.2 The materials of the bearing rings and rolling elements shall be selected from ZGCrI5, vacuum degassed GCr15 and bearing steel that meets the requirements of YB9 according to their different use parts.
3.3 Tempering temperature
3.3.1 For bearings made of GCr15 steel, the rings of bearings with the supplementary code S0 shall be tempered at 200℃ and the rollers at 180℃; the surface hardness of both shall comply with the provisions of Table 1 of JB/T12551991. 3.3.2 In order to eliminate grinding stress and stabilize the size, the rings of bearings with the supplementary code S0 shall be tempered at 180℃ after rough grinding.
3.4 Bearing structure and dimensional tolerance
3.4.1 The roller generatrix of cylindrical and tapered roller bearings with inner diameter d greater than or equal to 70mm is convex or modified convex; the inner ring raceway generatrix shape of the bearing at the transmission end of the armature shaft of the traction motor shall be manufactured according to the drawings agreed upon by the user and the manufacturer. 3.4.2 For QJ0000 type four-point contact ball bearings, in addition to meeting the dimensional tolerances specified in the product drawings, the difference dms1-dm2 between the average inner diameters of the single plane of the two half inner rings of the same bearing and the difference BB between the single widths of the two half inner rings shall not be greater than the provisions of Table 1. Table 1
Bearing nominal inner diameter d
>18~30
>30~50
>50~80
>80~120
>120~180
>180-250
dup-dep
3.4.3 Grouped interchangeable bearings include the bearings listed in Table A3 of Appendix A and traction motor bearings NU426Q1/C9S0, NU426Q1/P69SO, NUP417Q1/C9S0, NJ328EQ1/C9S0, NU330EQ1/C9S0, NJ318EQ1/C9S0+HJ318, NJ330EQ1/C9S0. The separable rings of the same type and the same group of bearings should be interchangeable. The group codes H, M, L or HP, LP indicating the upper, middle, lower or upper and lower half of the clearance distribution range are added after the clearance code, such as C9H, P69M, C9LP.... Note: Group interchangeability refers to the cylindrical roller bearings that do not belong to the interchangeable radial clearance. The separable rings of the same type and the same group of bearings are interchangeable and their rotation accuracy and radial clearance are all qualified. 3.4.4 In order to utilize the locomotive axles and diesel engine crankshafts after the journals are ground down, subscribers can centrally order bearings or inner rings with a diameter reduced by 0.5~2mm (for locomotive axles, four grades are allowed) or 0.5~! mm (for diesel engine crankshafts, two grades are allowed) from the bearing manufacturer or professional parts factory; the models are in accordance with the provisions of Table 2 and Table 3. Nominal inner diameter
Bearing model
NNQP4232Q1/S0-1
NNP 4232 Q1/S0-1
B7032AC/S0-1
Crankshaft main journal reduction
1) 12V180ZL diesel engine crankshaft main journal bearing. 4 Inspection method and inspection rules
JB/T8924-—1999
Bearing inner diameter grade size
NNQP4232Q1/S0-2
NNP4232QI/S0-2
B7032AC/S0-2
Bearing assembly inscribed circle diameter
282.5 8128
282 8198
NNQP4232Q1/S0-3
NNP 4232QI/S0-3
B7032AC/S0-3
NNQP4232Q1/S0-4
NNP4232Q1/S04
B7032AC/S0-4
Bearing model
LRN 6/283L1/P6↓1)
LRN 6/283LI/P62\
4.1 The measurement method of bearing tolerance shall comply with GB/T307.2, and the measurement of bearing clearance shall comply with the provisions of JB/T3573. 4.2 The quality inspection of bearing rings and rolling elements after heat treatment shall be in accordance with the provisions of JB/T1255. The sleeves and rollers must be 100% inspected in accordance with the provisions of Appendix B of JB/T1255-1991. 4.3 The axial clearance of QJ0000 four-point contact ball bearings is measured by moving the outer ring to the upper and lower limit positions as shown in Figure 1. Figure 1 Schematic diagram of axial clearance measurement of QJ0000 bearings JB/T8924-1999
4.4 The AQL value and inspection level of the inspection items such as the finished bearing size tolerance, rotation accuracy, part hardness and surface roughness, the number of sampling sets (pieces) and the method of judging whether they are qualified or not shall all be in accordance with the provisions of JB/T8921. 5 Marking, rust prevention and packaging
5.1 Marking
In addition to the markings specified in JB/T3574, for bearings manufactured according to this standard, the bearing model and supplementary code shall be mechanically printed on the ring end face where the bearing should be printed. The inner and outer ring end faces of group-interchangeable bearings shall be marked with the group code by chemical or electrolytic method in accordance with the provisions of 3.4.3, with a spacing of 5 characters from the model. 5.2 Rust prevention and packaging
Bearings manufactured according to this standard shall be rust-proofed and packaged internally and externally in accordance with the provisions of GB/T307.3, JB/T3034, JB/T3016 and JB/T3017.
5.3For all group-interchangeable bearings and cylindrical roller bearings for locomotive axle boxes, the separable rings shall be packaged separately (referring to the plastic film or packaging paper packaging close to the bearing).
5.4 The outer packaging should be packed in cartons (according to JB/T3017) or wooden boxes (according to JB/T3016) according to the size of the bearing. The bearing model and group code (referring to the bearings specified in 5.3) should be marked on the obvious part of the carton or wooden box. Serial number
Bearing model
NNOP4232X2O1/C9S0
6034/C4S0
7034AC/SO
NNP4232X2Q1/C9S0
B7032AC/S0
23234X3K/C3S0
24136C/C3SO
NJ3232X2WB1Q1/C9S0
NU3232X2WBQ1/C9S0
JB/T8924-1999
Appendix A
(Standard Appendix)
Models, dimensions and running tables of rolling shafts for locomotives A1
Locomotive bogie axlebox bearings
Dimensions|| tt||NU3232X2WB1Q1/C9S0+HJ3232X2
Bearing model
NU426QI/C9S0
NU426Q1/P69S0
NUP417Q1/C9S0
NU300EQ1/C9S0
NJ328EQ1/C9S0+HJ3 18 | | tt | | NJ328EQ1/C9S0 | 9S0
NJ322EQ1/C9S0+HJ322
NJ320EQ1/C9S0+HJ320
22318/C3S0
NU424Q1/C9S0
Radial play
Traction motor, main generator bearings
Overall dimensions
Radial play
Example of installation location| |tt||Axle box for diesel and electric locomotives
Axle box for diesel and electric locomotives
Axle box for electric locomotives
Axle box for diesel and electric locomotives
Axle box for diesel and electric locomotives
6Y, axle box for electric locomotives
ND, axle box for diesel and electric locomotives
Axle box for diesel and electric locomotives
Axle box for diesel and electric locomotives
Axle box for diesel and electric locomotives
Installation location example
ZQDR-204 traction motorWww.bzxZ.net
ZQDR-410 traction motor
ZQDR-204, 410 traction motor
ZQDR-410C, GE752 traction motor
ZQDR-410C, TAO659C traction motorZQ-650-1 traction motor
ZQ-850 traction motor
ZQDR-1350, 3000 main generator
GCE1100/10 main generator
AT-73 main generator
TAO659C traction motor
TAO649C, TAO649B, traction motor TAO649C, TAO649B,Traction motorGE752 traction motor
GDTM533M traction motor
GDTM533M traction motor
Bearing model
NU2938Q1/P59S0
NU2944Q1/P59S0
NU1026Q1/P69S0
NU1028Q1/P69S0
NU1032Q1/P69S0
NU1032Q1/P59S0||tt ||NU1040QI/P59S0
NU1044Q1/P69S0
NU1044NQ1/P59S0
NU1048Q1/P69S0
NU1048Q1/P59S0
NU222Q1/P69S0
NU222Q1 /P59S0
NU224EQ1/P69S0
NU224EQ1/P59S0
·NU226E Q1/P69S0 | | tt | 232EQ1/P59S0
NU234Q1/P69S0
NU324NQ1/P69S0
NU330EQ1/P69S0
NU2226EQ1/P69S0
NU2322EQ1/P69S0
NU2322EQ1/C9S0
NJ2320EQ1/P69S0
NJ2322EQ1/P69S0
JB/T8924-1999
Table A3 Transmission system bearings with interchangeable groups
Overall dimensions
Radial clearance||tt| |Installation location example
Hydraulic transmission case reversing shaft
Hydraulic transmission case turbine shaft
Hydraulic transmission case input shaft
Hydraulic transmission case input shaft
Hydraulic transmission case brake shaft
Hydraulic transmission case reversing shaft
Axle gear box
Hydraulic transmission case turbine shaft
Axle gear box
Hydraulic transmission case turbine shaft
Hydraulic transmission case turbine shaft
Hydraulic transmission case turbine shaft
Hydraulic transmission case turbine shaft||tt ||Axle gearbox
Hydraulic transmission box turbine shaft
Hydraulic transmission box input shaft
Hydraulic transmission box turbine shaft
Hydraulic transmission box output shaft
Hydraulic transmission box turbine shaft
Axle gearbox
Hydraulic transmission box turbine shaft
Hydraulic transmission box output shaft
Hydraulic transmission box turbine shaft
Hydraulic transmission box pump, turbine shaft
Hydraulic transmission box input shaft
Hydraulic transmission box input shaft
Axle gearbox||t t||Axle gearbox
Axle gearbox
Hydraulic transmission box intermediate gear shaft
Hydraulic transmission box intermediate gear shaft
Bearing model
6007/P63
6205/P63
6210Q1/P63S0
6230M/P6S0
6306M/P63S0
6307M/P63S0
6308M/P63S0
6309M/P63S0
6312M/P63S0
6317/P63
6314/C3
6407M/P63S0
6408M/P63S0||NU1007/P69
NU205M/P69S0
NU206M/P 69S0
NU207M/P69S0
NU210Q1/P69S0
NU212/P69S0||tt ||NU214Q1/P69S0
NU220Q1/P69S0
NU306M/P69S0
NU307M/P69S0
NU307NM/P69S0
NU308M/P69S0
NU310M/P69S0
NU311Q1/P69S0
NU312Q1/P69S0
NU313Q1/P69S0||tt| |NU314Q1/P69S0
NU315Q1/P69S0
NU315Q1/P59S0
NU318M/P69S0
JB/T8924-1999
Overall dimensions
Transmission system bearings
Radial clearance
Installation location examples
Hydraulic transmission box travel pump drive shaft
High-speed gear drive shaft
Hydraulic transmission box auxiliary drive shaft
Hydraulic transmission Three shafts of the box
Transmission box oil supply pump transmission shaft
Transmission box oil supply pump transmission shaft
Transmission box oil supply pump transmission shaft
Transmission box oil supply shaft
Transmission box oil supply pump transmission shaft
Hydraulic pressure pump gearbox output shaft
Transmission box motor transmission shaft
Transmission box travel pump transmission shaft
Transmission box oil supply pump transmission shaft
Transmission box travel pump transmission shaft
Speed governor transmission shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box fan coupler
Hydraulic transmission box fan coupler
Hydraulic transmission box input shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump drive shaft
Hydraulic transmission box oil supply pump, fan drive shaft Hydraulic transmission box motor drive shaft
Hydraulic transmission box motor shaft, stator generator hydraulic transmission box motor transmission shaft
Hydraulic transmission box motor transmission shaft
Hydraulic transmission box motor transmission shaft
Hydraulic transmission box turbine shaft
Hydraulic transmission box input shaft, turbine shaft
Bearing model
NU320Q1/P69S0
NU322Q1/P69S0
NU2316Q1/P69S0YA1
NU2319Q1/C9S0||t t||LRN6/283L1/P6
22314/C3S0
22315/C3S0
22316/C3S0
23048Q1/S0
23048C/C3S0
22226/C3S0
604 910T
604912T
604914T
N2876F2/P69S0YA
NUP2876F2 /P69S0YA
B7228ACQ1/P6S0
7311ACM/P6
7312ACJ
7315ACM/P6
7315ACM/P6DT
B7324ACQ1/S0
B7226BQ1/S0||t t||B7230BQ1/S0
30215/S0
31315/S0
30244/S0|| tt||QJ1938Q1/P53S0
QJ1036N2Q1/P53S0
QJ1038N2Q1/P53S0
QJ1044N2Q1/P63S0
QJ1048N2Q1/P63S0
QJ205N2Q1/P63S0
JB/T8924-1999
Table A4 (continued)
Overall dimensions
Radial clearance
Installation positionExample
Hydraulic transmission box input shaft
Hydraulic transmission box input shaft
Axle gearbox
Axle gearbox
Diesel engine crankshaft main journal
Axle gearbox
Axle gearbox
Axle gearbox
Axle gearbox
Electric locomotive traction motor shaft bearing
Universal shaft support
M 25 universal joint bearing
M35 universal joint bearing
M50 universal joint bearing
Electric locomotive traction motor full-suspension installationElectric locomotive traction motor full-suspension installationIntermediate gearbox
Hydrostatic gearbox
Hydraulic transmission boxFan coupler
Hydrostatic pump
Hydrostatic pump
Intermediate gearbox, axle gearbox
NY5 Diesel locomotive L condition box input box
NY5 diesel locomotive I condition box input box
Metro electric passenger car axle gearbox
Metro electric passenger car axle gearbox
Metro electric passenger car axle gearbox
Hydraulic transmission box second shaft, reversing shaft
Hydraulic transmission box reversing shaft
Hydraulic transmission box reversing shaft
Axle gearbox
Axle gearbox
Hydraulic transmission box and pump drive shaft
Bearing model
QJ214N2Q1/P63S0
QJ220N2Q1/P63S0
QJ224N2Q1/P63S0
QJ224N2Q1/P53S0
QJ226N2Q1/P63S0
QJ228N2Q1/ P63S0
QJ228N2Q1/P53S0
QJ230N2Q1/P63S0
Q1/P63S0
QJ313N2Q1/P 63S0
QJ318N2Q1/P63S0
QJ322N2Q1/P63S0
QJ328N2Q1/P63S0
JB/T8924-1999
Table A4 (end)
Overall dimensions
Radial clearance
Example of installation location
Hydraulic transmission case coupling|| tt||Hydraulic transmission box input shaft
Hydraulic transmission box intermediate shaft, output shaft
Hydraulic transmission box pump wheel shaft, turbine shaft
Hydraulic transmission box input shaft
Hydraulic transmission box output shaft, reversing shaft
Hydraulic transmission box pump wheel shaft, turbine shaft
Hydraulic transmission box input shaft, axle gear box hydraulic transmission box turbine shaft
Hydraulic transmission box output shaft
Hydraulic Transmission box turbine shaft
Hydraulic transmission box turbine shaft, output shaft
Hydraulic transmission box motor transmission shaft
Hydraulic transmission box pump wheel shaft, input shaft
Axle gearbox
Axle gearbox
1 The self-aligning roller bearings in Table A2, Table A3, Table A4 and the cylindrical roller bearings in the 2 and 3 diameter series should be actively replaced with the reinforced structure of the metal solid cage. For example: 22315/C3S0 can be replaced by 223I5CM/C3S0, and NU220QI/P69S0 can be replaced by NU220EQ1/P6PS0.
2 The matching radial clearance of 7000AC, B7000AC and B7000 angular contact ball bearings in Table A1 and Table A4 is not listed in this appendix table and is specified by the product drawings of each manufacturer.
3The radial clearance of cylindrical roller bearings in Tables 1 to 4 does not meet the current standards. It is indicated by C9 in the model.
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