GB/T 38768-2020Highly flexible rubber coupling—Test requirements and methods (English PDF)
高弹性橡胶联轴器 试验要求及方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
April 28, 2020
Implementation date
November 1, 2020
Scope
GB/T 38768-2020 is the English-translated version of 高弹性橡胶联轴器 试验要求及方法.
GB/T 38768-2020 is the Chinese standard "Highly flexible rubber coupling—Test requirements and methods".
Its scope clause reads: This standard specifies the terms and definitions, test conditions, test items, test classification, high elastic rubber couplings (hereinafter referred to as couplings), Test requirements and methods, test reports, etc. This standard applies to highly elastic rubber couplings. Its clauses include terms and definitions.
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Document preview — GB/T 38768-2020
National Standard of the People's Republic of China
- ICS
- 21.120.20
- Classification
- J 19
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 3.1 Highly flexible rubber coupling high flexible rubber coupling
- 3.2 Static torsional stiffness
- 3.3 Dynamic torsional stiffness
- 3.4 Damping energy
- 3.5 Elastic strain energy
1 Scope
This standard specifies the terms and definitions, test conditions, test items, test classification, high elastic rubber couplings (hereinafter referred to as couplings),
Test requirements and methods, test reports, etc.
This standard applies to highly elastic rubber couplings.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 528 Determination of tensile stress and strain properties of vulcanized rubber or thermoplastic rubber
GB/T 531.1 Test method for indentation hardness of vulcanized rubber or thermoplastic rubber Part 1. Shore hardness tester method (Shore hardness)
GB/T 1683 Vulcanized rubber constant deformation compression permanent deformation method
GB/T 2941 Rubber physical test method General procedure for sample preparation and adjustment
GB/T 3512 vulcanized rubber or thermoplastic rubber hot air accelerated aging and heat resistance test
GB/T 12830 Determination of shear modulus and bond strength of vulcanized rubber or thermoplastic rubber and rigid board
GB/T 13936 Determination of tensile shear strength of vulcanized rubber bonded to metal
GB/T 19466.2 Differential scanning calorimetry (DSC) of plastics. Part 2. Determination of glass transition temperature
HG/T 2198 General requirements for physical test methods of vulcanized rubber
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Highly flexible rubber coupling high flexible rubber coupling
The obvious elastic deformation of the rubber elastic element is used to compensate for the relative displacement of the two shafts, attenuate the vibration shock, and adjust the torsional vibration of the shaft system
Characteristic coupling.
3.2 Static torsional stiffness
The ratio of the increment of the elastic torque under static load to the increment of the corresponding torsional angular displacement.
3.3 Dynamic torsional stiffness
The ratio of the vibration torque to the amplitude of the corresponding vibration angular displacement in a vibration cycle.
3.4 Damping energy
Vibration energy dissipated in a vibration cycle due to damping.
3.5 Elastic strain energy
Energy stored in a vibration cycle due to elastic deformation.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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