GB/T 40116-2021 English PDF

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GB/T 40116-2021: Foil bearings - Performance of hydrodynamic gas journal bearings - Testing of static load capacity, friction coefficient and lifetime
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 40116-2021	344	Add to Cart	4 days	Foil bearings - Performance of hydrodynamic gas journal bearings - Testing of static load capacity, friction coefficient and lifetime	Valid

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Basic data

Standard ID: GB/T 40116-2021 (GB/T40116-2021)
Description (Translated English): Foil bearings - Performance of hydrodynamic gas journal bearings - Testing of static load capacity, friction coefficient and lifetime
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J12
Word Count Estimation: 18,135
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 40116-2021: Foil bearings - Performance of hydrodynamic gas journal bearings - Testing of static load capacity, friction coefficient and lifetime

---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.
Foil bearings-Performance of hydrodynamic gas journal bearings-Testing of static load capacity, friction coefficient and lifetime ICS 21.100.10 CCSJ12 National Standards of People's Republic of China Foil bearing gas dynamic pressure radial bearing performance Static load capacity, friction factor and life test (ISO 13939.2019, Foilbearings-Performancetestingoffoil Released on 2021-05-21 2021-12-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standard Documents" Drafting. This document uses the translation method to be equivalent to ISO 13939.2019 ``Foil Bearings Foil Radial Bearing Performance Test Static Load Capacity Force, friction factor and life test". This document has made the following editorial changes. ---Since foil bearings can use other lubricating media or adopt hydrostatic lubrication, in order to be consistent with the content, the name is changed to Static load capacity, friction factor and life test of gas dynamic pressure radial bearing performance of single-piece bearing". This document was proposed by China Machinery Industry Federation. This document is under the jurisdiction of the National Sliding Bearing Standardization Technical Committee (SAC/TC236). This document was drafted by. China Machinery Productivity Promotion Center, Hunan University, Hunan Chongde Technology Co., Ltd., Luoyang Bearing Research Co., Ltd., Wenli (Guangdong) Technology Co., Ltd., Zhejiang Changsheng Sliding Bearing Co., Ltd. This document is interpreted by the National Technical Committee for Standardization of Sliding Bearings. Foil bearing gas dynamic pressure radial bearing performance Static load capacity, friction factor and life test

1 Scope

This document describes the performance test method and result comparison method of foil gas dynamic pressure radial bearings. The bearing is lubricated by air (gas). The sliding medium is supported by the gas dynamic pressure generated by the rotation of the shaft. The test method given in this document aims to test and evaluate the dynamic pressure of foil gas The static load carrying capacity, friction factor and service life of the radial bearing are tested under different test conditions (such as foil gas dynamic pressure radial bearing size, The test results obtained by rotating shaft speed, ambient air pressure and humidity, etc.) are compared. Since the test conditions can be changed, it can be tested by setting Test conditions to change the static load carrying capacity of the bearing. The conditions of use of the test methods described in this document are as follows. a) The steady state is the prerequisite for the evaluation of static load carrying capacity, that is, under certain working conditions, the load magnitude, direction and speed are always the same; b) The evaluation procedure can only be entered when the foil gas dynamic pressure radial bearing maintains the moment of inertia at a certain speed; c) The dynamic load with time-varying amplitude and time-varying direction is not considered.

2 Normative references

There are no normative references in this document.

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Takeoff The gas dynamic pressure between the rotating shaft and the top foil ensures that the rotating shaft and the top foil begin to separate a certain distance during the operation phase. 3.2 Clearance The minimum distance between the shaft and the top foil when the geometric center of the shaft coincides with the geometric center of the sleeve. 3.3 Bearing torque The friction torque between the rotating shaft and the top foil due to friction caused by rotation. Note. Refer to 6.4 for bearing friction torque test. 3.4 Load Loadcapacity The load that the bearing can withstand under static conditions. 3.5 Initialload The load (3.4) applied to the rotating system at the initial stage. Note. The initial load should be less than the static load capacity and the load used to determine the bearing life, see 7.3 and 10.2. ......

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