Some standard content:
Mechanical Industry Standard of the People's Republic of China
JB/T768295
Serpentine spring safety coupling
Published on June 16, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on July 1, 1996
Mechanical Industry Standard of the People's Republic of China
Serpentine spring safety coupling
1 Subject content and scope of application
JB/T768295
This standard specifies the classification, structural type, main dimensions, technical requirements, inspection rules, marking, packaging and transportation of serpentine spring safety couplings (hereinafter referred to as couplings).
The coupling specified in this standard is suitable for connecting two coaxial transmission shaft systems. It has certain compensation for the relative offset of the two shafts and vibration reduction and buffering performance, and can adjust the safety torque within a certain range. The adjustment range is: (1.6~12.5)N·m to (4500~50000)N·m, and the ambient temperature is -30℃～+100℃.
2 Reference standards
GB1176
GB1222
GB1591
GB3507
GB3852
GB3931
GB4879
GB4892
GB6388
GB12458
JB/T6397
3 Classification
3.1 Type
Packaging, storage and transportation graphic symbols
Technical conditions for cast copper alloys
Technical conditions for hot-rolled spring steel
Technical conditions for low-alloy structural steel
Nominal torque series of mechanical couplings
Types and dimensions of coupling shaft holes and keyways
Terminology of mechanical couplings
Rust-proof packaging
Hard rectangular transport packaging dimension series
Transport packaging shipping and receiving marks
Classification of mechanical couplings
High-quality carbon cable structural steel
The coupling instantaneous contact characteristics are divided into:
Constant stiffness serpentine spring safety coupling
AMS type
AMSB type - variable stiffness serpentine spring safety coupling 3.2 Structural type, basic parameters and main dimensions The structural type, basic parameters and main dimensions of the coupling shall comply with the requirements of Figure 1 and Table 1. Approved by the Ministry of Machinery Industry on June 16, 1995
Implemented on July 1, 1996
Vivid Environment
JB/T768295
Figure 1 Structure of AMS and AMSB type serpentine spring safety couplings 1-thick polyester sleeve; 2-inner sleeve, 3-clamp sleeve; 4-wiping plate, 5-friction plate, 6-pressure adjustment device 7-spring ear, 8-serpentine spring, 9-groove sleeve, 10-half coupling sleeve Table 1 Basic parameters and main dimensions of AMS and AMSB type serpentine spring safety couplings Nominal torque
Adjustment range
Permissible speed
Shaft hole diameter H?
Shaft hole length
Moment of inertia
kg ·m
AMSB10
AMSB11
AMSB12
AMSB13
AMSB14
Nominal torque
Measurement range
16~125
45~355
56~500
80~710
112~1250||tt ||140~1600
224~2500
2503550
355~4500
Permissible speed
JB/T7682-95
Continued Table 1
Diameter of output hole H7
Shaft hole length
Moment of inertia
AMSB15
AMSB16||tt| |AMSB17
AMSB18
AMSB19
AMSB20
AMSB21
AMSB22
Nominal torque
Adjustment range
4505600
560~8000
710~11200
1120~18000||t t||2240~28000
3550~31500
3550~35500
4500~50000
Permissible speed
JB/T768295
Continued Table 1
Shaft hole diameter H7
Shaft hole length
Note: Within the torque adjustment range, the error of each measured torque should be less than 5%. 3.3 Model and marking
3.3.1 The coupling model shall comply with the following provisions: A
Specification code (see Table 1)
Stiffness code (variable stiffness is B)
Type code
Variety code
Group code
Moment of inertia
kg ·n'
JB/T 768295
The model of constant stiffness serpentine spring safety coupling is: AMS; the model of variable wheel spring safety coupling is: AMSB3.3.2 Serpentine spring section type code
Rectangular surface serpentine spring type code: J: Trapezoidal load surface serpentine spring type code: T3.3.3 The coupling marking shall comply with the provisions of GB3852. Marking example:
AMS3 serpentine spring safety coupling
Driving end: J, type shaft hole. A-type keyway d=25mm, L=82mmDriven end: J, type shaft hole, A-type keyway, d=35mm, L=60mmAMS3 coupling 125×82
J35×60
3.4 Type and size of serpentine spring
The type and size of serpentine spring shall comply with the requirements of Figure 2 and Table 2. JB/T7682
Rectangular energy surface
For the allowable compensation of the coupling, please refer to Table 3.
Allowable compensation
Radial 4Y
Angular e
Technical requirements
AMS1~AMS5
AMSB1~AMSBS
Serpentine spring
Main dimensions of serpentine spring
Grid-shaped load surface
Allowable compensation of the coupling
AMS6~AMS9
AMSB6~AMSB9
The material of the main parts of the coupling shall not be lower than the specifications in Table 4 Table 4 Materials of main parts of coupling
Part name
Half coupling
Serpentine spring
Friction disc
Inner sleeve
Serpentine spring outer cover
50CrVA
Iron-based powder metallurgy
Steel-based powder metallurgybZxz.net
ZCuSn5Pb5Zn5
JB/T 6397
Standards to be met
Rolling state GB1222. Heat treatment: rate fire, same fire 42~50HRC working pressure p≤1.47MPa,
250℃
friction coefficient is 0.25~0.28
GB1176
GB1591
application temperature range 6≤400℃,
JB/T 7682-95
4.2 The surface and interior of the serpentine spring are not allowed to have any cracks, scars, scratches, inclusions and other defects. 4.3 The coupling used under high-speed operation conditions should meet the requirements of the main engine shaft system. The coupling must be subjected to dynamic balancing test, and its accuracy is not lower than the requirements of the main engine.
4.4 The serpentine spring and the inner sleeve should be lubricated with composite calcium-based ZFG-4 grease during operation. The amount of grease to be filled is referenced in Table 5. Table 5 Grease filling amount
Grease filling amount
Grease filling amount
Grease filling amount
AMSB16
AMSB10
AMSB17
AMSB11
AMSB18
AMSB12
AMSB19
AMSB13
AMSB20
Itching materials should comply with relevant regulations and should not have defects such as cracks, gaps, delamination, blistering, etc. 4.5
Safety guards should be installed on the couplings during installation. 5 Inspection rules
AMSB14
AMSB21
The couplings should be inspected and qualified by the quality inspection department of the manufacturer and accompanied by a quality certificate before they can leave the factory. 5.1
AMSB15
AMSB22
5.2 The serpentine springs should comply with the provisions of Articles 4.1 and 4.2 of this standard. If the serpentine springs are manufactured and provided by professional factories, they should be accompanied by a certificate of quality. 5.3 During mass production, random inspections should be carried out, and the random inspection method shall be negotiated between the user and the manufacturer. Marking, packaging, storage
6.1 Marking
The coupling shall be marked with the model in an obvious position6.1.2
The coupling certificate shall include:
Coupling model, standard number:
Manufacturer name;
Inspection pass mark:
Factory date;
Factory number.
6.2 Packaging
6.2.1After cleaning, the coupling shall be packed for rust prevention according to the relevant provisions of GB4879. 6.2.2After rust prevention packaging, the coupling shall be packed in an outer packaging box, and the size of the packaging box shall comply with the provisions of GB4892. 6.2.3The marking on the wooden packaging box shall comply with the provisions of GB191 and GB6388. 6.3 Storage
The coupling should be stored in a dry place away from sunlight and rain. It should avoid contact with acid, alkali, organic solvents and other substances during the storage period. 6
JB/T7682-95
Appendix A
Selection instructions for coupling
(reference)
A1 The coupling is selected according to the load conditions, calculated torque and working speed. A2 Calculated torque:
Where, T. Calculated torque, N·m:
P-—dynamic power, kW;
n—working speed, r/min
K——operating condition coefficient + obtained from Table A1.
T, = 9550 × PK
A3 According to the calculated torque and working speed of the coupling and the shaft end diameter, select the coupling model from Table 1 and verify whether the safety torque meets the requirements.
Working condition coefficient K
Prime mover
Motor
Classification of working machinery
Class I: Machinery with medium torque change, such as mixers, superchargers, compressors with flywheels, punch presses, etc. Class 1: Machinery with small torque change and impact load, such as looms, tractors, locomotives, etc. Class 1: Machinery with medium torque change and impact load, such as crushers, sand cleaning machines, etc. Class IV: Machinery with large torque change and impact load, such as elevators, rolling mills, etc. Additional notes,
This standard was proposed and managed by the Xi'an Heavy Machinery Research Institute of the Ministry of Machinery and Nuclear Industry. This standard was drafted by the Xi'an Heavy Machinery Research Institute. The main drafter of this standard is Yang Zhijun.
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