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GB/T 38768-2020 English PDF

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GB/T 38768-2020: Highly flexible rubber coupling - Test requirements and methods
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Basic data

Standard ID GB/T 38768-2020 (GB/T38768-2020)
Description (Translated English) Highly flexible rubber coupling - Test requirements and methods
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J19
Classification of International Standard 21.120.20
Word Count Estimation 10,115
Date of Issue 2020-04-28
Date of Implementation 2020-11-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 38768-2020: Highly flexible rubber coupling - Test requirements and methods

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Highly flexible rubber coupling--Test requirements and methods ICS 21.120.20 J19 National Standards of People's Republic of China High elastic rubber coupling test requirements and methods 2020-04-28 release 2020-11-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Standardization Technical Committee for Machine Shafts and Accessories (SAC/TC109). This standard was drafted by. China Shipbuilding Industry Corporation 711 Research Institute, Taiyuan Heavy Industry Co., Ltd. Enter the center, Hengshui Liuyang Coupling Factory, Wuxi Chuangming Transmission Engineering Co., Ltd., Taier Heavy Industry Co., Ltd. The main drafters of this standard. Liu Guohua, Kong Manjun, Ming Cuixin, Wang Xiaoling, Liu Luming, Hengjing Wu, Xia Qinghua, Zhu Yue. High elastic rubber coupling test requirements and methods

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 flexiblestrainenergy Energy stored in a vibration cycle due to elastic deformation.

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