JB/T 743-2000 Z series seat type sliding bearings for motors

This standard specifies the model, specifications, dimensions, technical requirements, test methods, inspection rules, transportation, packaging and storage of seat-mounted sliding bearings for motors. This standard applies to seat-type sliding bearings used in general horizontal motors with rated speeds of 1500r/min and below. JB/T 743-2000 Z series seat-mounted sliding bearings for motors JB/T743-2000 Standard download and decompression password: www.bzxz.net

Pressing Machinery Ring Industry Standard of the People's Republic of China JB/T7432000
2000-04-24 4
Double||tt ||D
Female
2000-10-01
JB/T743±2000| |tt||e
This standard is a revision of JB743-79. Both the technical content and the writing structure have been changed. This standard will replace JB743-79 from the date of implementation. Appendix A, Appendix B, and Appendix C of this standard are appendices of the standard. Appendix D of this standard is a reminder appendix.
This standard is proposed and managed by Harbin Electric Machinery Research Institute. This standard was drafted by: Shanghai Electric Machinery Co., Ltd., Harbin Electric Machinery Co., Ltd., and Nanjing Steam Turbine Co., Ltd. The main drafters of this standard: Qian Zhong, Li Hengchun, and Ju Rong. This standard was first published in 1965, revised for the first time in 1979, and revised for the second time in December 1999. This standard is interpreted by Harbin Electric Machinery Research Institute. 1
2 xe/4
JB/T743±2000
JB74379
this The standard stipulates the model, specifications, dimensions, technical requirements, test methods and inspection rules, packaging, transportation and storage of seat-mounted sliding bearings for motors.
This standard applies to seat-type sliding bearings used in general horizontal motors with rated speeds of 1500r/min and below. 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. The editions shown were valid at the time of publication of the standard. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB755—2000
GB/T3141—1994
3 models
Rating and performance of rotating electrical machines
ISO viscosity classification of industrial liquid lubricants
3.1 version The basic structural type of series bearings is represented by the letter "Z" and is called "Z series seated sliding bearings" (hereinafter referred to as bearings). 3.2 Bearing structural types include: oil ring lubrication, compound lubrication, one-end shaft, two-end shaft, and with or without insulation to the ground. The models are represented by letters and numbers respectively, as specified in Table 1. Table 1 Bearing structure type
End shaft
One end shaft
Two end shaft
Oil ring lubrication
Not insulated||tt| |H1
Insulation
Note: Compound lubrication refers to the lubrication method that has both oil ring oil supply and pressure oil supply. Marking example:
compound lubrication
non-insulated
seat-type bearing Z11-H2 indicates a diameter of Φ110, oil ring lubrication, non-insulation , seat-type sliding bearing with shafts at both ends. 4 Bearing diameter and length
The bearing diameter and length are as specified in Table 2.
Table 2 Bearing diameter and length
Diameter
Length
140||tt ||130
140160
2000-04-24
160| |tt||180
250||tt ||280
Insulation
2000- 10-01
JB/T743±2000
5 Installation dimensions and overall dimensions of oil ring lubrication and composite lubrication bearings Installation dimensions and appearance of oil ring lubrication and composite lubrication bearings The dimensions should comply with the requirements in Figure 1 and Table 3. Temperature measurement lead-out part
Oil mark
Figure 1
Table 3 Bearing installation and overall dimensions
Bearing diameter
220|| tt||250
8||tt| |850
360|| tt||420
175||tt| |195
180|| tt||220
M36||tt| |M42
中16||tt ||@16
20||tt ||50
Reference weight
330||tt| | 460 | tt||The size of the oil inlet and outlet position of the composite lubricated bearing should comply with the requirements of Figure 2 and Table 4, g
Temperature measurement lead-out part
Oil mark
plate
Nanzhong
Figure 2
Oil in direction A| |tt||4-dio
Oil inlet between B
Table 4 Oil inlet and outlet position dimensions of composite lubricated bearings Bearing diameter
220| |tt||250
290| |tt||320
310||tt ||340
80| |tt||d
Oil inlet flange
d|| tt||55
Column 1d and d are the inlet and outlet oil flange oil distribution pipes The diameter in brackets is the nominal diameter of the pipe. Sizes 24 and 44 are for reference.
7 technical requirements
(25)||tt ||39
Oil outlet flange
75||tt| |90
M12 | | tt | | M12 | | tt | It should be able to operate continuously under the following conditions: 3 | In normal operation of the motor, the allowable temperature of the bearing is 80°C, the oil supply pressure of compound lubrication is 50kPa, and the oil inlet temperature is 15°C ~ 40°C: when the oil ring supplies oil, the lubricating oil temperature is not lower than 5°C; for insulated bearings The ground insulation resistance is not less than 0.5Mα. 7.3 The bearing should be equipped with a temperature measuring device
7.4 The bearing alloy of the bearing bush should be tightly combined with the tile body after casting, and there should be no shelling. The bearing alloy friction surface is not allowed to have visible scars, pores, blisters, cracks and other defects. 7.5 No leakage is allowed in the oil chamber of the bearing seat.
7.6 points The connecting parts at the half oil ring joint must not be loose or protruding, and the oil ring must maintain good roundness. 7.7 Before assembly, the bearing must be kept strictly clean, and a small amount of lubricating oil should be applied to the inner surface of the bearing bush. 7.8 There should be no obvious signs of leakage in the bearings when the motor is running. 8 Test methods and inspection rules
8.1 Bearing dimensions shall be inspected with universal measuring tools.
8.2 The insulation resistance is measured with a 500V megger. 8.3 Leakage in the oil chamber of the bearing seat should be visually inspected by pouring kerosene for 1 hour. 8.4 The bearing must be inspected by the quality inspection department of the manufacturer to pass the inspection. 8.5 The test methods and requirements for bearing use are in accordance with the provisions of motor product standards. 9 Packaging, transportation and storagebzxz.net
9.1 The packaging of bearings is consistent with the product packaging specifications according to different regions. When packaging the product as a whole, measures must be taken to prevent the impact of the rotor on the bearings during shipment.
9.2 Drain the lubricating oil from the bearing seat oil chamber before packaging, and apply anti-rust oil on the processed surface. 9.3 When packaging bearings individually, the following must be noted; a) All exposed processed surfaces are coated with anti-rust oil, and the inner circle of the bearing bush is covered with film; b) Small parts such as positioning taper pins, foot bolts, washers, etc. should be packaged in bags or small boxes. To avoid loss, the temperature measuring device should be filled with soft objects around it when it is installed in a small box to prevent damage.
9.4 Avoid moisture and collision when transporting bearings. 9.5 Bearings should be stored in a ventilated and dry warehouse. 4
JB/T7432000
Appendix A
(standard appendix)
Dimensions and tolerance requirements of the matching part of the rotating shaft and the bearing A1 Dimensions and tolerances of the matching part of the rotating shaft and the bearing The tolerance requirements should comply with the requirements of Figure A1 and Table A1. ep/
Figure AI
Table A1 Size and tolerance requirements of the matching parts of the rotating shaft and bearing d
250| |tt||280
L||tt ||140
165.2| |tt||175.2
360.3||tt ||400.3
320| |tt||360
When the unit uses a rigid coupling, dimension L is for reference. d
230| |tt||250
550||tt ||Not less than
130||tt| |165
Front bearing
Rear bearing||tt| |≥5
2 This structure diagram is for reference only. Other sealing structures can also be used while ensuring that the dimensions of the rotating shaft 4 and L remain unchanged. L3 | | tt | | 35 | | tt | | 40 | /min adopts d8mm
JB/T7432000
Appendix B| |tt|| (Standard appendix)
Bearing load capacity and lubrication method
Bearing load capacity and lubrication method are specified in Table B1. Table B1 Bearing load capacity and lubrication method Bearing bush
Diameter
140||tt| |150
161.9| |tt||196.2201.1
103.0|| tt||133.4
45.6||tt ||59.8
152.0| |tt||201.1
1表中维折线在了他分，可以油环部了。转
70.1| |tt||94.2
10.8||tt ||12.3
45.1|| tt||59.8
500||tt| |12.8
13.7| |tt||15.2
53.0||tt ||70.6
102.0| |tt||137.3
29.4||tt ||31.4
2在费折线在在通过，可以量角油环油法的重角油玻油板的可以下重油环油法可以使用时间重油玻。
JB/T7432000
附能C
（standard 附能）
安全汽车油的发动油量和油法室的傮油量展开水油量的水油量和水室的水油量见表C1。C1
表C1 composite lube bearing of circulating oil量和水水室的水油量长瓦diameter
mm| |tt||110
200||tt ||220
3.1| |tt||4.4
2.2||tt ||3.0
33.0|| tt||追
1.3||tt ||1.5
10.8||tt| |15.4
20.0|| tt||27.0
2.4||tt| |3.5
1500|| tt||2.9
吗承油室
储油量1
22| |tt||28
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