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GB/T 24609-2023: Rolling bearings - Thermal speed rating - Calculation
Status: Valid
GB/T 24609: Evolution and historical versions
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| GB/T 24609-2023 | English | 334 |
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Rolling bearings - Thermal speed rating - Calculation
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| GB/T 24609-2009 | English | 559 |
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Rolling bearings -- Thermal speed rating -- Calculation and coefficients
| Obsolete |
Standard similar to GB/T 24609-2023
GB/T 24608 | GB/T 24610.2 | GB/T 24610.3 | GB/T 24607 | Basic data
| Standard ID | GB/T 24609-2023 (GB/T24609-2023) |
| Description (Translated English) | Rolling bearings - Thermal speed rating - Calculation |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | J11 |
| Classification of International Standard | 21.100.20 |
| Word Count Estimation | 18,194 |
| Date of Issue | 2023-12-28 |
| Date of Implementation | 2024-04-01 |
| Older Standard (superseded by this standard) | GB/T 24609-2009 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 24609-2023: Rolling bearings - Thermal speed rating - Calculation
---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.
ICS 21:100:20
CCSJ11
National Standards of People's Republic of China
Replace GB/T 24609-2009
Calculation method for rated thermal speed of rolling bearings
Rolingbearings-Thermalspeedrating-Calculation
(ISO 15312:2018,IDT)
Published on 2023-12-28
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols and Units 2
5 Reference condition 3
5:1 General 3
5:2 Reference conditions for determining frictional heating 3
5:3 Reference conditions for determining heat dissipation 4
6 Calculation method of rated thermal speed 7
Appendix A (Informative) Coefficients f0r and f1r 8
Appendix B (informative) Notes 10
Appendix C (informative) Rated thermal speed of grease lubricated rolling bearings11
Reference 12
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document replaces GB/T 24609-2009 "Calculation Methods and Coefficients of Rated Thermal Speed of Rolling Bearings" and is consistent with GB/T 24609-
Compared with:2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows:
a) Changed the order of some symbols (see Table 1, Table 1 of the:2009 version);
b) Changed the format of "Reference Conditions" (see Chapter 5, Chapter 5 of the:2009 edition);
c) Move the "Annotation" chapter to the appendix (see Appendix B, Chapter 7 of the:2009 edition);
d) Move the contents of the appendix "Rated thermal speed of grease-lubricated rolling bearings" to Appendix C (see Appendix C, Appendix B of the:2009 edition):
This document is equivalent to ISO 15312:2018 "Calculation Method for Rated Thermal Speed of Rolling Bearings":
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed by China Machinery Industry Federation:
This document is under the jurisdiction of the National Rolling Bearing Standardization Technical Committee (SAC/TC98):
This document was drafted by: Luoyang Bearing Research Institute Co:, Ltd:, Renben Co:, Ltd:, Zhejiang Zhaofeng Mechanical and Electrical Co:, Ltd:, Dalian
Metallurgical Bearing Co:, Ltd:
The main drafters of this document: Zhao Binhai, Li Feixue, Guo Changjian, Kang Naizheng, Wang Dehui:
The previous versions of this document and the documents it replaces are as follows:
---First published as GB/T 24609-2009 in:2009;
---This is the first revision:
Calculation method for rated thermal speed of rolling bearings
1 Scope
This document specifies the definition of the rated thermal speed of oil bath lubricated rolling bearings and the calculation principles for determining this parameter: From a tribological point of view
See, the parameters determined in this document apply not only to bearings of standard construction of a given series and size, but also to other relevant standard constructions:
Structured bearings:
For most standard components, the heat of the entire component is generated by the bearings, and the maximum operating speed is determined by the allowable temperature:
Due to kinematic effects, the rated thermal speed specified in this document does not apply to thrust ball bearings:
Note 1: Appendix A gives the average value of the coefficients f0r and f1r - f0r is the coefficient for calculating the viscous loss of the oil bath lubricated bearing, and f1r is the coefficient for calculating the friction loss of the bearing:
coefficient:
Note 2: Appendix B gives annotations on the limit criteria:
Note 3: Appendix C determines the reference conditions for grease lubrication: The reference conditions can be selected so that the rated thermal speed for grease lubrication is equal to that for oil bath lubrication:
Thermal speed:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document:
ISO 76 Rolling Bearing Static Load Ratings (Rolingbearings-Staticloadratings)
Note: GB/T 4662-2012 Static load rating of rolling bearings (ISO 76:2006, IDT)
ISO 1132-1 Tolerances for rolling bearings Part 1: Terms and definitions (Rolingbearings-Tolerances-Part 1:
Note: GB/T 4199-2003 Rolling bearing tolerance definition (ISO 1132-1:2000, MOD)
ISO 5593 Rolling Bearings Vocabulary (Rolingbearings-Vocabulary)
Note: GB/T 6930-2002 Rolling bearing vocabulary (ISO 5593:1997, IDT)
ISO 5753-1 Rolling bearing clearance Part 1: Radial clearance of radial bearings (Rolingbearings-Internalclear-
Note: GB/T 4604:1-2012 Rolling bearing clearance Part 1: Radial clearance of radial bearings (ISO 5753-1:2009, IDT)
Note: GB/T 7811-2015 Rolling bearing parameter symbols (ISO 15241:2012, IDT)
3 Terms and definitions
The terms and definitions defined in ISO 1132-1 and ISO 5593 and the following apply to this document:
The URLs for the terminology databases used in standardization work maintained by ISO and IEC are as follows:
---ISO online browsing platform: https://www:iso:org/obp;
3:1
rated thermal speed thermalspeedrating
Internal temperature when the heat generated by bearing friction and the heat dissipated through the bearing support surface (shaft and housing) are balanced under reference conditions:
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