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

K 20
JB
Pressing Machinery Ring Industry Standard of the People's Republic of China JB/T7432000
2000-04-24 4
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Double||tt ||D
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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
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2 xe/4
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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
H2
Insulation
HJ1
HJ2
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
F1
F2
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
110
140
120
140||tt ||130
140
140160
2000-04-24
150
160
160
160| |tt||180
180
200
200
220
220
250
250||tt ||280
280
320
320
360
360
400
400
Insulation
FJ
FJ2
mm
450
450
500
500
2000- 10-01
2
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
A
Figure 1
Table 3 Bearing installation and overall dimensions
Bearing diameter
110
120
130
140
150
160
180
200
220|| tt||250
280
320
360bzxz.net
400
450
500
8||tt| |850
900
950
1060
1200
1400
1700
260
280
320
380
450
560
670
L
340
360|| tt||420
480
560
670
780
H
4
175||tt| |195
230
280
345
425
505
770
800
830
920
1040
1220
1500
A
140
160
180|| tt||220
280
360
450
d
M24
M30
M36||tt| |M42
M48
M56
M64
d,
中16
p16
中16||tt ||@16
Φ25
中25
Φ25
20
20
20
20||tt ||50
50
50
mm
Reference weight
kg
300
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
5
plate
Nanzhong
Figure 2
4-dg
d4
tt
ds
Oil in direction A| |tt||4-dio
a
Oil inlet between B
Table 4 Oil inlet and outlet position dimensions of composite lubricated bearings Bearing diameter
d
110
120
130
140
150
160
180
200
220| |tt||250
.280
320
360
400
450
500
43
260
290| |tt||320
380
440
520
600
A4
280
310||tt ||340
410
470
580
700
Al
120
140
170
200
250
310
370
A2
60
70
80| |tt||d
19
(15)
33
(25)
Oil inlet flange
d|| tt||55
75
ds
80
100
Note
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
ds
M10
M12
d-
33
(25)||tt ||39
(32)
74
(65)
Oil outlet flange
dg
75||tt| |90
130
d.
100
120
160
mm
dn
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 storage
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/
F
Figure AI
10
Table A1 Size and tolerance requirements of the matching parts of the rotating shaft and bearing d
110
120
130
140
150
160
180
200
220
250| |tt||280
320
360
400
450
500
Note
L||tt ||140
160
180
200
220
250
280
320
360
400
450
500
hole
135.2
145.2
155.2
165.2| |tt||175.2
185.2
210.3
230.3
250.3
280.3
320.3
360.3||tt ||400.3
440.3
500.3
550.3
d
axis
135
145
155
165
175
185
210
230
250
280
320| |tt||360
400
440
500
550
When the unit uses a rigid coupling, dimension L is for reference. d
135
145
155
165
175
185
210
230| |tt||250
280
320
360
400
440
500
550||tt ||Not less than
110
130
120
140
125
150
130||tt| |165
145
175
150
Front bearing
3
2
Rear bearing||tt| |≥5
1
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
r
5
6
5
B1
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
mam
110
120
130
140||tt| |150
160
180
_200
220
250
280
320
360
400
450
500
125
66.7
88.3
112.8
152.0
150
52.5
70.1
94.2
122.6
161.9| |tt||196.2201.1
注
167.
41.7
54.4
73.6
98.1
127.5
169.7
218.8
187
30.9
43.2
56.9
77.0
103.0|| tt||133.4
176.6
227.6
214.
19.6
26.0
32.9
45.6||tt ||59.8
81.4
108.9
141.3
186.4
241.3
250
15.2
16.7
21.6
28.4
35.8
48.6
64.7
87.3
117.7
152.0| |tt||201.1
260.0
1表中维折线在了他分，可以油环部了。转
t/min
300
11.8
15.2
16.7
18.1
24.0
30.9
38.7
52.5
70.1| |tt||94.2
125.6
162.8
215.8
284.5
速
375
10.8||tt ||12.3
13.7
17.2
18.6
20.1
26.5
33.8
42.2
56.9
76.0.
101.0
137.3
178.5
236.4
313.9
428
11.8
13.2
14.7
18.6
19.6
21.6
28.4
35.8
45.1|| tt||59.8
80.4
107.9
143.2
186.4
251.5
333.5
500||tt| |12.8
14.2
15.7
19.6
21.6
23.0
30.4
38.2
47.6
64.7
85.8.
114.8
157.0
204.0
267.8
600
13.7| |tt||15.2
17.2
21.6
23.5
25.0
32.9
41.2
53.0||tt ||70.6
92.2
123.6
168.7
219.7
750
14.7
16.7
18.6
23.5
25.5
27.5
36.3
46.1
57.9
77.5
102.0| |tt||137.3
kN
1000
16.7
19.6
22.1
27.5
29.4||tt ||31.4
41.2
52.0
64.7
1500
20.1
23.5
25.5
31.4
33.8
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。
6
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
120
130
140
150
160
180
200||tt ||220
250
280
320
360
400
450
500
250
3.4
5.1
7.3
9.6
13.6
18.7
300
3.1| |tt||4.4
5.9
8.4
11.5
16.4
22.5
375
2.2||tt ||3.0
4.3
5.0
7.4
10.5
14.4
20.5
28.1
428
0.7.
0.7
0.8
1.1
1.2
1.4
2.0
2.6
3.6
4.6
5.8
8.7
12.4
17.0
24.0
33.0|| tt||追
速
'min
500
0.8
0.9
1.0
1.3||tt ||1.5
1.7
2.4
3.0
3.8.
5.1
7.2
10.8||tt| |15.4
21.0
30.0
600
1.0
1.1
1.4
1.7
1.9
2.2
2.5
3.4
4.5
6.6
9.3
14.0
20.0|| tt||27.0
750
1.4
1.5
1.5
1.9
2.2
2.4||tt| |3.5
4.7
6.3
9.3
13.0
19.4
1000
1.7
1.8
2.2
2.8
3.2
3.5
5.2
7.1
9.4
1500|| tt||2.9
3.2
3.8
4.9
5.6
Vmin
吗承油室
储油量1
12
16
22| |tt||28
45
85
125
7
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