This standard specifies the classification, technical requirements, test methods and inspection rules of elastic damping spring couplings. This standard applies to couplings used to adjust the natural frequency of torsional vibration of mechanical systems and reduce the amplitude of resonance in diesel engine power units such as ships, internal combustion locomotives, diesel generator sets, heavy vehicles and industrial diesel engine power units. GB/T 12922-1991 Elastic damping spring coupling GB/T12922-1991 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Elastic damping leaf coupling
Elastic damping leaf coupling 1 Title Content and Scope of Application
GB/T 12922-91
This standard specifies the classification, technical requirements, test methods and inspection rules of elastic damping leaf coupling (hereinafter referred to as coupling). This standard applies to couplings used to adjust the natural frequency of torsional vibration of mechanical systems and reduce the amplitude of resonance in diesel engine power units such as ships, internal combustion locomotives, diesel engine generator sets, heavy vehicles and industrial diesel engine power units. 2 Terminology
2.1 Circular frequency of excitation Circular frequency of excitation torque of diesel engine.
2.2 Characteristic frequency Concharacteristic frequency A characteristic value used to calculate the dynamic stiffness and damping coefficient of coupling. 2.3 Static torsional stiffness of coupling C, static torsional stiffness of coupling Torsional stiffness of coupling under static load. 2.4 Dynamic torsional stiffness of couplingCadynamic torsional stiffness of couplingThe torsional stiffness of the coupling under dynamic load, when 0≤, C= C(1 +0.37)
a >ao, Ca = C. · (1. 1 + 0. 27 %)2.5 Relative damping factorXrelative damping factorThe ratio of the damping vibration torque transmitted by the coupling to the elastic vibration torque. When 0≤≤, X=0.20+0.50
> , X = 0. 70
2.6 Permissible elastic vibratory torque (T.) Permissible elastic vibratory torque The permissible value of the alternating torque borne by the coupling spring group. 2.7 Permissible damping vibratory torque [Ta] Permissible damping vibratory torque The permissible value of the damping vibration torque borne by the coupling for a long time. 2. 8 Permissible thermal load [P,] Permissible power lass The permissible value of the thermal load borne by the coupling.
2.9 Permissible radial compensation AY] Permissible radial compensation The permissible value of the radial relative offset generated by the two connected shafts during operation. 2.10 Permissible axial compensation (AX) The compensation coupling compensates the allowable value of the axial relative offset of the two shafts during operation. The State Technical Supervision Bureau approved it on May 22, 1991. It was implemented on February 1, 1992. 3 Product classification 3.1 Product structure, basic parameters and main dimensions GB/T12922-91 3.1.1 According to the structure of the spring group, the coupling is divided into irreversible and reversible, as shown in Figure 1 and Figure 2. Figure 1 Irreversible coupling Figure 2 Reversible coupling |3.1.2 According to the structure of the connecting flange, the coupling is divided into three types of connection: B, BC, and BE, as shown in Figures 5 to 7. 3.1.3 Structure
Figure 3 Basic structure of the coupling
The basic structure of the coupling is shown in Figure 3, which consists of internal components and external components. The internal components mainly include: spline shaft 7, O-type rubber sealing ring 8, sealing ring seat 9; the external components mainly include: center block 1, hexagonal bolt 2, side plate 3, center ring 4, fastening ring 5, flange 6, spring assembly 10.
3.1.4 Basic parameters
12922. 91
According to the relative torsion angle between the inner and outer components under the nominal torque, the coupling is divided into six series: 55, 85, 140 and 55U, 85U, 140U. The basic parameters of each series are shown in Tables 1 to 6. Table 1 Basic parameters of 5 series couplings
Nominal torque
Specification series
41×2.5-55
41×5-55
41×7. 5-55
41×10-55
48X7.5-55
48×10-55
48×12.5-55
56x10-55
56X12. 5-55
56x15-55
63×12.5-55
63x15-55
63×17.5-55
72×15-55
72×17.5.55
72X20-55
80×17.5 -55
80×2 0-55 | 30-55
125 ×25-55
125×30-55
125×35-55
Static torsional stiffness Characteristic frequency Allowable damping Vibration moment Allowable thermal load Allowable radial compensation Allowable axial compensation C
MNm/rad
kNm/MPa
Ke free pull
Specification series
41 x2.5-85
41x5-85
48×7.5-85
48×10-85
56×10-85
56×12.5-85
63×12.5-85
63×15-85
72×15-85 Www.bzxZ.net
72×17. 5-85 | -85
110×25-85
125×20-85
125×25-85
125×30-85
GB/T 12922—91
Basic parameters of 285 series couplings
Nominal torque||Static torsional stiffness
Permissible radial compensation
Permissible axial compensation
Permissible damping
MNm/rad
【Ta】
kNm/MPa
Free of charge
Specification series
41X2.5-140
41x5-140
41×7.5-140
41×10-140
48×7.5-140
48×10-140
48×12.5-140
56×10-140
56×12.5-140
56×15-140
63X12. 5-140
63×15-140
63×17.5-140
72×15-140
72×17. 5-140
72×20-140
80×17. 5-140
80×20-140
80×22.5-140
90×22.5-110
90×25-140||tt| |100X22.5-140
100×25-140
110×25-140
110×30-140
125X25-140
125×30-140
125×35-140
GB/T12922—91
Table 3 Basic parameters of 140 series couplings
Nominal torque Static torsional stiffness Characteristic frequency
Allowable damping Vibration torque Allowable thermal load Allowable radial compensation Allowable axial compensation T.
MNm/rad
kNm/MPa
Ke free down traction
Specification series
41×2.5-55U
41×5-55U
41×7.5-55U
A1X10-55U
48X7.5-55U
48X10-55U
48X12.5-55U
56X10-55U
56×12.5-55U
56×15-55U
63X12.5-55U
63×15-55U
63×17. 5-55U
72×15-55u
72 ×17. 5-55U
72X20-55U
80X17.5-55U
80×20-55u
80×22.5-55u
90×20-55U
90×22.5-55U
90×25-55U
100×22.5-55U
100×25-55U
110×22.5-55u
110X25-55U
110×30-55u
125×25-55U|| tt||125×30-55U
125×35-55U
1292291
Table 4Basic parameters of 55U series couplings
Nominal torque
Static torsional stiffness Characteristic frequency Allowable damping Vibration torque Allowable thermal load Allowable radial compensation Allowable axial compensation
MNm/rad
kNm/MPa
Free of charge for information science and technology
Specification series
41×2.5-85U
41X5-85U
41×7.5-85U
11× 10-85U | | tt | 5-85U
63x15-85U
63X17.5-85U
72X15-85U
72X17.5-85U
72×20-85U
80×17.5-85U
|80x22.5-85U
90X20-85u
90X22.5-85U
90×25-85u
100×22.5-85U
100X25-85U
110×22. 5-85U
110×25-85U
110×30-85u
125×25-85U
125×30-85U
125×35-85U
GB/T12922—91
Table 5 Basic parameters of 85U series couplings
Nominal torque Static torsional stiffness Characteristic frequency Allowable damping Vibration torque Allowable thermal load Allowable radial compensation Allowable axial compensation T
MNm/rad
1, 320
［Ta】||t t||kNm/MPa
Free download
Specification series
41X2.5-140U
41×5-140U
41X7.5-140U
41×10-140U
48×7.5-140
48X10-140U
48×12.5-140U
56×10-140U
56×12.5-140U
56×15-140u
63×12. 5-140U | | tt | | 63X15-140U | 0U | |tt | | 80X22.5-140U | 12922
Table 6Basic parameters of 140U series couplings
Allowable damping Vibration torque Allowable thermal load Allowable radial compensation Allowable axial compensation Nominal torque Static torsional stiffness Characteristic frequency
110× 22. 5-140U129. 00
110×25-140U
110X30-140U
125×25-140U
125×30-140U
125×35-140U
MNm/rad
The allowable elastic vibration torque of the coupling is calculated according to Figure 4. 3.1.5
kNm/MPa
Free download of information science
Calculation example:
Coupling model
Nominal torque of coupling
Average torque of diesel engine
Continuous allowable elastic vibration torque
Instantaneous allowable elastic vibration torque
GB/T 1292291
Instantaneous allowable line
Continuous allowable line
Figure 4 Allowable elastic vibration torque of coupling
BC90X 20-55
T, 166 kNm
T108 kNm
［TJ= T, ×0. 40567 kNm
T. JT, X0. 650108 kNm
3.1.6 Main dimensions, moment of inertia and weight The main coupling dimensions, moment of inertia and weight of the coupling are shown in Tables 7 to 9. Free
41×10
48×10
56×10
56×15
63×15
72×15
72 ×17.5
72×20
80×15
80×20
90×25
100×20
12922-91
Figure 5 B-type coupling
Table 7 Connection dimensions, moment of inertia and weight of B-type coupling558514055u85u14 0U
91245245245245
116270|270270
141295|295295
166320
152335335335
177360360|360
202385 ||tt| |190400400400
215425425125
240450
221455455455
249480480480
274505
256505505505
2815305 3053 0
306555
289555555545
3145805801570
339605-
322620620615
1347645645640
372670
100X 22.5 353675675660
378700
100×25
110×20
110×22.5
393755755735
110×30
125×20||tt| |125 × 25 | | tt | | 125 × 30 | | tt | 30 285|20 25120|1752653150.16
90480|27533525301601953003550.41
100560|3153903035180|2203454050.921.95
11063035 5|430 3540180 | 250 | 3854601.601.65 | | tt | | 1902804405252.75 | | tt | 5490580 | | tt | 339.00650 |
23.10613.00
470558
700840
8651032
9301106
9951180| | tt | 2635
23802775
27603290
291013460
570 30603630 | | tt | 25048582092590041005300
43.40/1025.00
15.00|1113.00|95047905740
Zike Free Download
48×10
56×10
56×15||tt ||63×15
72×15
72×17. 5
72×20
80×15
80×20
90×20
90×25
100×20
1292291
Figure 6 BC type coupling
Table 8 BC type coupling connection dimensions, moment of inertia and weight C
55|85|140|55u85u140u
91[170|170|170|| tt ||116195195195 ||tt | |215325325325
240|350
224345345345
249370|370370
274395
256380380380
281/405405405
3064301
[289/415415405
31440440130
1322 475475470
347500500495
100x22.5353||tt| |3520520505
378545
100×25
110×20
110×25
110×30
125×20
125×25
125×30
125×35
195195
Moment of inertia
Internal"External
Total of internal and external
0. 143.14
410230|2852040120200/465510
2753552517160|230545595
5603153903050180270630
630|355/43035551803 00715
7204004754060190|335810
393580580560
443630
392590|615590625
1442665665640 675 | |tt | |tt||8.55216.00
12.85305.00
350428
167780
185910
2401070|1310
2501150|1400
31014901800
32515901915||tt ||3401690|2030
36518902255
1000555|6555577220510|1115|120513.15323.003802015239
3952140|2535
13.45341.00
21.20479.0053024302960
1002082522
15502580|3130
22.20532.00
570273 03300||tt ||23.10585.00
61030303640
40.20796.0080031203920
41.80884.00850 3510 | 4360 | | tt | | 12506908207082250 | 6351395152513.40972.009003900 | 4800 | tt||48×10
56×10
63×15
72×15
72×20
80×15
80×20|| tt||90×20
90×25
12922. 91
Figure 7 BE type coupling
Connection dimensions, moment of inertia and weight of BE type coupling C
5585140|55U85U140U
100180180180180
125205205205
150230230230||tt| |175255
161255255255
186280280280
211|305
199310310|310
224335335335
249360
23335035035 0|| tt| |258375
5375375
283400
269390395395
294/425|420|420
319440
302430435420
327455450445
352 480 | | tt | | 335490490485 | |tt||391560
110×20
110×22.5375
110×25
110×30
125×20
125×25
125× 30
125×35
545560
400590590570||t t||450|640
409610635610
459685|685660
509735
710745
41023028520
48027533525
31539030
355 43035
10047540
120|200|265
160230300
1180270345
1180300385
190335440
44553045||tt ||2190370490
900500590502220|460|580
1000555|655552
220510640
Moment of inertia
Internal and external
Total of internal and external||tt| |12.85252.
75013.15270. 00
110134
320398
10801330
11601420
14001710
1500|1825
16001940
17602125
18802260
13.45288.00
20002395
21.20380.00
110060572060322055571082 0 | | tt | | 1250690820 | 703250630820930 | 0|| tt||23.10486.00
40.20652.00
61027903400
80029103710
41. 80740. 00|850 33004150
43.40828.00
90036904590
45.00916,00
9504080503091
Figure 7 BE type coupling
Connection dimensions, moment of inertia and weight of BE type coupling C
5585140|55U85U140U
100180180180180
125205205205
150230230230||tt| |175255
161255255255
186280280280
211|305
199310310|310
224335335335
249360
23335035035 0||tt| |258375
5375375
283400
269390395395
294/425|420|420
319440
302430435420
327455450445||t t||352 480 | | tt | | 335490490485 | 0
110×20
110×22.5375
110×25
110×30
125×20
125×25
125×35
545560
400590590 570||t t||450|640
409610635610
459685|685660
509735
710745
41023028520
48027533525
31539030||t t||355 43035
10047540
120|200|265
160230300
1180270345
1180300385
190335440
44553045
219 0370490
900500590502220|460|580
1000555|655552
220510640
Moment of inertia
Internal and external
Total of internal and external
12.85252.
75013.15270. 00 | | tt | | 110134 | 260
13.45288.00
20002395
21.20380.00
110060572060322055571082 0 | | tt | | 1250690820 | 703250630820930 | 0
23.10486.00
40.20652.00
61027903400
80029103710
41. 80740. 00|850 33004150
43.40828.00
90036904590
45.00916,00
9504080503091
Figure 7 BE type coupling
Connection dimensions, moment of inertia and weight of BE type coupling C
5585140|55U85U140U
100180180180180
125205205205
150230230230||tt| |175255
161255255255
186280280280
211|305
199310310|310
224335335335
249360
23335035035 0||tt| |258375
5375375
283400
269390395395
294/425|420|420
319440
302430435420
327455450445||t t||352 480 | | tt | | 335490490485 | 0
110×20
110×22.5375
110×25
110×30
125×20
125×25
125×35
545560
400590590 570||t t||450|640
409610635610
459685|685660
509735
710745
41023028520
48027533525
31539030||t t||355 43035
10047540
120|200|265
160230300
1180270345
1180300385
190335440
44553045
219 0370490
900500590502220|460|580
1000555|655552
220510640
Moment of inertia
Internal and external
Total of internal and external
12.85252.
75013.15270. 00 | | tt | | 110134 | 260
13.45288.00
20002395
21.20380.00
110060572060322055571082 0 | | tt | | 1250690820 | 703250630820930 | 0
23.10486.00
40.20652.00
61027903400
80029103710
41. 80740. 00|850 33004150
43.40828.00
90036904590
45.00916,00
95040805030
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