Some standard content:
Machinery Industry Standard of the People's Republic of China
Polygonal Rubber Coupling
Subject Content and Scope of Application
JB/T 5512-1991
This standard specifies the LD polygon The type, basic parameters, main dimensions and technical requirements of rubber couplings (hereinafter referred to as couplings).
This standard is applicable to the transmission shaft system connecting two coaxial lines, and has certain performance of compensating the relative displacement of the two axes. The working environment temperature is -30℃C60℃, and the nominal transmission torque is 50N·m~8000N·m. 2 Reference standards
Mechanical coupling nominal torque series
GB3507
GB3852 coupling shaft hole and keyway type and size GB3931 mechanical coupling terminology||tt| |JB/ZQ4000 general technical conditions
JB/ZQ4286 general technical conditions for packaging
3 types, basic parameters and main dimensions
3.1
Types, basics of couplings The parameters and main dimensions should comply with the regulations in Figure 1 and Table 1. The mark
Y-type shaft hole
blood type shaft hole
Z-type shaft tie was approved by the Ministry of Mechanical and Electronics Industry on July 10, 1991
Figure 1
Standard
Implemented on 1992-07-01
401
Model
ID1
Nominal name| |tt||Torque
T,
Nm
50
LD2!
80
-LD3
160
ID4280
LD5560
LD6
800
1D71250| |tt||402
allowed speed
allowed torque
n
r/min
5000
4000||tt ||3150
2500
2000
1800
1600
Rotation angle
(°)
JB/T5512 —1991
Table 1
Shaft hole length
Shaft hole diameter
d+ d?+d.
12,14
16 ,18,19
20,22,24
25
16,18.19
5
4
20,22,24
25,28
30,32
20,22,24
25,28
30,32,35,38||tt| |40
22,24
25,28
30,32,35,38
40, 42, 45, 48,
50, 55
25,28
30,32,35,38
40,42,45,48,
50,55,56
60 ,63,65,70,71
128
30,32.35,38
40,42,45,48,
50,55,56||tt ||60, 63, 65, 70,
71,75
35,38
40,42, 45,48,
50,55.56||tt ||60,63,65,70.
71.75
80,85
Y type JZ type
L
L
32
42
52
62
42
52
62
82
52| |tt||62
82
112
52
62
82
112
62||tt ||82
112
142
62
82
112
142
82
112
142
172
30
38
44
30
38
44| |tt||60
38
44
60
84
38
44
60||tt ||84
44
60
84
107
44
60
84
107
60
84
107
132
A
96
118
D| |tt||42
55
1421 68
182
235
258
282
92|| tt||122
128
148
B
28
32
46
52||tt| |62
68
78
F
4
5
9
12
12
75
85
105
120
140
150
13.5
185|| tt||Weight
kg
1.9
mm
Rotation
Inertia
kg+m2
0.001|| tt||3. 90. 003 1
8.00.008 9
14.2
0.026
31.40.095
35.6
0.132
0.287
58.4
Model
Nominal
Torque
T,
N?m||tt| |LD82500
LD93550
1.D 105 600
ID 118 000
Permissible speed allowed twist
[n]
r /min
1250
1120
1000
900
Rotation angle
(°)
Shaft hole diameter| |tt||di,d2+d,
JB/T5512-1991
Table 1 (End)
Shaft hole length
Y type|JZ, type| |tt||L1
40,42,45,48,
50,55,56
60, 63, 65, 70,
71,75| |tt||80,85,90,95
100,110
45,48,50,55,56
60,63,65,70,
71 ,75
80,85,90,95
100,110,120,
125,130
50,55,56
60, 63, 65, 70,
71,75
80,85,90.95
100,110
120125
130,140,150
60,63,65,70,| |tt||71,75
80,85,90,95
100,110
120,125
130,140,150
160
112
142
172
212
112
142
172| |tt||212
112
142
172
212
252
142
172||tt ||212
252
302
84
107
3.72
132
167
84
107
420
132
167
84
107
132
167| |tt||202
107
132
167
202
242
465
520||tt ||D
B
1901100
220
242
260
115
130
150 | | tt | | 15 | | tt | | 15 | ② LD1~LD6 polygonal rubber elastic parts are hexagonal. LD7LD11 polygonal rubber elastic parts are octagonal. ③ The coupling shaft hole combination types include Y-J, Y-Z, J-Z, Y-Y, J-J ① The instantaneous impact torque is not greater than 2.3 times the nominal torque. Weight and moment of inertia are approximate calculations of the maximum values ??for each model. 3.2 The type and size of the shaft hole and keyway of the coupling are in accordance with the regulations in GB3852. 3.3 Model and Marking
3.3.1 Model Description
D
XX
Specification Sequence Number
Polygonal "Duo" Chinese Pinyin First The first letter of the Chinese pinyin character "Lian" of the letter coupling 3.3.2 Marking example
White
Weight
kg
230117.1
270| |tt||295
365
mm
rotation
inertia
kg·m2
0.952
171.81. 981
252.9
3.606
F
386.7
7.48
403
Example 1: D2 type polygonal rubber Coupling
JB/T5512—1991
Active end: Y-shaped shaft hole, A-type keyway, d,=20mm, L=52mm; Driven end: Y-shaped shaft hole, A-type Keyway, d2-20mm, L=52mm; ILD2 coupling 20×.52JB5512
Example 2: I.D5 polygonal rubber coupling
Active end: Z, type shaft hole, C-type keyway, d, a 50mm, L, = 84mm; driven end: J, type shaft hole, B, type keyway, dz = 50mm, L, = 84mm; LD5 coupling
Technical requirements| |tt||4
4.1
Z C50 Manufactured according to drawings and technical documents approved by prescribed procedures. 4.2
The allowable angular, axial and radial compensation amounts of the coupling are not greater than the specified values ??in Table 2. Table 2
Type
No.
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
ILD 9
LD10
LD11
Allowable angular compensation amount
(°)
5
5
4
4
3
3
3
2|| tt||2
2
2
allowable axial compensation amount
mm
±2
±2.5||tt ||±3
±3.5
±4
±4
±4
±4.5
±4.5||tt| |±5
±5
Note: The allowable compensation amount refers to the range that can be used when the speed is less than 70% of the allowable speed. 4.3 The materials of coupling parts shall not be lower than those specified in Table 3. Table 3
Part name
Half coupling
Polygonal rubber elastic piece
Screw
Screw
Female
Bolt
Material
Material
ZG 270 ~ZG 500
See Appendix A (Supplement)
8
8.8||tt ||The appearance of polygonal rubber elastic parts should be smooth and flat, without defects such as impurities, bubbles, cracks, etc. 4.4
4.5
The castings and machined parts of the coupling should be assembled in accordance with the relevant regulations of JB/ZQ4000. 4.6 When the coupling speed exceeds 1500r/min, dynamic balancing is required, and the balancing accuracy is G6.3. 5 Test methods and inspection rules
5.1
Factory test
404||tt ||say
GB11352
allowable radial compensation
mm
1
1
1
1.5
1.5
1.5
2
2
2
2
2
Ming|| tt||Composed of rubber and steel seats
JB/ZQ4351
GB5782
JB/T 5512—1991
The coupling must be trial-assembled before leaving the factory , the connecting parts should be well assembled and easy to disassemble. 5.2 Type test
The coupling manufacturer should conduct a type test of at least one specification. The test items are as follows: transmission efficiency reaches more than 98%;
a.
b, in Under the action of 2.3 times the instantaneous overload torque, there is no damage to the coupling parts; check whether the nominal torque meets the specified value at the allowable speed. c
5.3 The inspection department of the coupling manufacturer shall conduct inspection and acceptance in accordance with the requirements of JB/ZQ4000.1, the provisions of this standard and the production drawings, and shall be accompanied by a product certificate.
5.4 Users can recheck product quality according to relevant technical requirements. The number of random inspections shall not be more than 2% of the delivery quantity of each batch, but shall not be less than 5 sets. The random inspection results shall all be qualified. If there are still unqualified products, double the number of products will be re-sampled for re-inspection; if there are still unqualified products, it can be determined that all products in the batch are unqualified.
6 Logo, packaging, storage
6.1 The product model mark should be printed on the outer non-working surface of the half coupling. 6.2 A professional manufacturer of polygonal rubber elastic parts should have an elastic part product code mark on the non-working surface of the elastic part. 6.3 The coupling should be packaged in accordance with the regulations of JB/ZQ4286 and accompanied by a product certificate. The packaging mark includes the following:
a.
Manufacturer name;
Product name and model;
b.
Standard number;||tt ||c
Weight;
d,
e.
Trademark and manufacturing date.
6.4 Polygonal rubber elastic parts are stored at room temperature with a special snap ring, and the shelf life is 2 years. 6.5. The coupling should be stored in a dry environment, away from sunlight, rain, and contact with water, acid, alkali and organic solvents. 405
JB/T5512—1991
Appendix A
Materials of polygonal rubber elastic parts
(Supplement)
ILD coupling elastic parts materials The physical and mechanical properties of the rubber selected should comply with the provisions of Table A1. A1
Table A1 Rubber physical and mechanical properties
Sequence
No.
1
2
3
4|| tt||6
7
406
Performance name
Hardness (Shore A type)
Tear off strength
Tear off Elongation
Determined elongation strength (300%)
Aging hardness change
100℃ air, 72h
Compression permanent deformation ratewww.bzxz.net
100℃, 24h
Oil resistance volume change rate
No. 30 mechanical oil, 100℃, 72h
Unit
Degree
N/cm2
%
N
Degree
%
%
Indicator
65±5
≥1800
≥300
1150
10
40
40
Test method
GB531 "Rubber Shore A hardness test||tt ||Method》
GB528 "
Determination of Tensile Properties of Vulcanized Rubber"
GB528
GB3512 "Rubber Hot Air Aging Test
Test Method"| | tt |
Appendix B
LD coupling selection instructions
(reference part)
The coupling is based on the load condition, calculated torque, shaft end diameter and operating speed To choose. B1
B2 Calculate the torque by formula (B1):
Pa
T.=TK×95501
m
Medium: T-
T
T.
P
12
Theoretical torque, N·m;
Nominal torque ,N·m;
calculated torque,N·m;
-driving power, kW;
-working speed, r/min;
K-- -Working condition coefficient (see table B1)
Table B1
working condition coefficient K
original
moving
motor
Machine
Operation
Machine
Internal combustion engine (more than 4 cylinders)
Internal combustion engine (more than 3 cylinders)
B3 working machine classification| |tt||I
1.0
1.5
2.0
1. 5
2.0
2.5
2. 0
2.5
3.0
V
2.5
3.0
3.5
(B1)
I. Machinery with small torque changes: such as generators, belt conveyors, small work machines, small fans, and small cranes (below 60r/min).
Ⅱ． Machinery with small torque changes: such as chain conveyors, ventilators, medium-sized working machines, marine propellers, rotary pumps, wood processing machinery, cranes (below 120r/min), elevators, cranes, and blowers. Ⅲ． Machinery with moderate torque variations: such as rotary compressors, plunger pumps, grinders, screens, rolling mill tracks, and winches. IV． Machinery with large torque changes: such as reciprocating compressors, various rolling mills, cranes (above 600r/min), crushers, and large forging machinery.
Additional notes:
This standard is proposed and administered by the Xi'an Heavy Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by the Xi'an Heavy Machinery Research Institute of the Ministry of Mechanical and Electronics Industry. The main drafters of this standard are Wang Zuodong, Pan Quan and Yan Jianwu. 407
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