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GB/T 24748-2023 English PDF

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GB/T 24748-2023: Reciprocating internal combustion engines - Flywheels - General specifications
Status: Valid

GB/T 24748: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 24748-2023	English	269	Add to Cart	3 days [Need to translate]	Reciprocating internal combustion engines - Flywheels - General specifications	Valid	GB/T 24748-2023
GB/T 24748-2009	English	359	Add to Cart	3 days [Need to translate]	Reciprocating internal combustion engines -- Flywheels -- General specifications	Obsolete	GB/T 24748-2009

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Basic data

Standard ID	GB/T 24748-2023 (GB/T24748-2023)
Description (Translated English)	Reciprocating internal combustion engines - Flywheels - General specifications
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J92
Classification of International Standard	27.020
Word Count Estimation	14,148
Date of Issue	2023-08-06
Date of Implementation	2024-03-01
Older Standard (superseded by this standard)	GB/T 24748-2009
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 24748-2023: Reciprocating internal combustion engines - Flywheels - General specifications

---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 27.020 CCSJ92 National Standards of People's Republic of China Replace GB/T 24748-2009 Reciprocating internal combustion engine flywheel technical conditions Published on 2023-08-06 2024-03-01 Implementation State Administration for Market Regulation Released by the National Standardization Administration Committee

Preface III 1 Scope 1 2 Normative reference documents 1 3 Terms and Definitions 2 4 Technical requirements 2 4.1 General requirements 2 4.2 Materials and metallographic structure 2 4.3 Casting requirements 2 4.4 Dimensional tolerance of processed parts 3 4.5 Shape and position tolerances of processed parts 3 4.6 Surface roughness of processed parts 3 4.7 Flywheel mark 3 4.8 Imbalance 4 4.9 Reliability4 4.10 Overspeed test 4 4.11 Cleanliness 4 4.12 Appearance quality 4 5 Inspection method 4 5.1 Mechanical property test 4 5.2 Hardness 4 5.3 Metallographic structure 5 5.4 Casting surface quality5 5.5 Coating quality5 5.6 Dimensional tolerance of processed parts 5 5.7 Shape and position tolerances of processed parts 5 5.8 Surface roughness 5 5.9 Unbalance 5 5.10 Reliability5 5.11 Overspeed test 5 5.12 Cleanliness 6 5.13 Appearance quality 6 6 Inspection Rules 6 6.1 Type inspection 6 6.2 Factory inspection 7 6.3 Spot inspection 7 6.4 Sampling plan 7 7 Marking, packaging, transportation and storage 8 7.1 Flag 8 7.2 Packaging8 7.3 Transport8 7.4 Storage 8

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 24748-2009 "Technical Conditions for Reciprocating Internal Combustion Engine Flywheels" and is consistent with GB/T 24748-2009. In addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The general assembly diagram of the flywheel, flywheel generator, pulley, and crankshaft has been deleted (see 3.1 and Figure 1 of the.2009 edition); b) Changed material and metallographic structure requirements (see 4.2, 3.2 of the.2009 edition); c) Changed casting requirements (see 4.3, 3.3 of the.2009 edition); d) Changed the dimensional tolerance requirements for processing parts (see 4.4, 3.4 of the.2009 edition); e) The shape and position tolerance requirements of the processing parts have been changed (see 4.5, 3.5 of the.2009 edition); f) The surface roughness requirements of the processed parts have been changed (see 4.6, 3.6 of the.2009 edition); g) The flywheel marking requirements have been changed (see 4.7, 3.7 of the.2009 version); h) Added dynamic balancing requirements in the unbalanced amount (see 4.8.2); i) Changed the reliability requirements (see 4.9, 3.9 of the.2009 version); j) Added overspeed test requirements (see 4.10); k) Added requirements for cleanliness and appearance quality (see 4.11 and 4.12); l) Changed the "inspection method" (see Chapter 5, Chapter 4 of the.2009 edition); m) Changes to the “Inspection Rules” (see Chapter 6, Chapter 5 of the.2009 edition); n) Changes in marking, packaging, transportation and storage (see Chapter 7, Chapter 6 of the.2009 edition). 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 Internal Combustion Engine Standardization Technical Committee (SAC/TC177). This document was drafted by. Kunming Yunnei Power Co., Ltd., Shandong Yunnei Power Co., Ltd., Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co., Ltd., Guangxi Daye Technology Co., Ltd., Shanghai Automotive Group Co., Ltd. Commercial Vehicle Technology Center, Kunming Li University of Technology, Shanghai Internal Combustion Engine Research Institute Co., Ltd. The main drafters of this document. Chen Liqiong, Zhang Haifeng, Hou Quanli, Guo Hua, Wang Fayao, Chen Shaofeng, Qiao Liangliang, Deng Wei, Xu Yuanzhi, Zhou Guisen, Lei Jilin, Ye Yongpeng, Chen Han, Chen Yunqing. This document was first published in.2009 and this is the first revision. Reciprocating internal combustion engine flywheel technical conditions

1 Scope

This document specifies the technical requirements, inspection methods, inspection rules, marking, packaging, transportation and storage of reciprocating internal combustion engine flywheels. This document applies to reciprocating internal combustion engine flywheels (hereinafter referred to as flywheels) with a cylinder diameter of.200mm or less (inclusive).

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. GB/T 197-2018 Ordinary thread tolerances GB/T 1095-2003 Cross-sectional dimensions of flat keyway GB/T 1184-1996 Shape and position tolerances No tolerance values noted GB/T 1348-2019 Ductile iron castings GB/T 1800.1-2020 Product Geometric Specification (GPS) Linear Dimensional Tolerance ISO Code System Part 1.Tolerances, The basis of deviation and fit GB/T 1804-2000 General tolerances Tolerances for linear and angular dimensions without tolerances noted GB/T 1958 Product Geometric Specification (GPS) Geometric Tolerance Detection and Verification GB/T 2828.1 Enumeration sampling inspection procedures Part 1.Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL) GB/T 2829 Periodic inspection counting sampling procedures and tables (applicable to inspection of process stability) GB/T 3177 Product Geometric Specification (GPS) Inspection of Smooth Workpiece Dimensions GB/T 3821 Cleanliness limits and determination methods for small and medium power internal combustion engines GB/T 6060.1-2018 Surface roughness comparison sample Part 1.Casting surface GB/T 6060.2 Surface roughness comparison sample grinding, turning, boring, milling, inserting and planing surface GB/T 6414-2017 Casting dimensional tolerances, geometric tolerances and machining allowances GB/T 7216-2009 Metallographic examination of gray cast iron GB/T 9239.1 Mechanical vibration constant (rigid) rotor balance quality requirements Part 1.Inspection of specifications and balance tolerances GB/T 9439-2010 Gray iron castings GB/T 9441-2021 Metallographic examination of ductile iron GB/T 11351-2017 Casting weight tolerance GB/T 30512 Requirements for banned substances in automobiles JB/T 7945.1 Test methods for mechanical properties of gray cast iron Part 1.Tensile test JB/T 9744 Magnetic particle testing of internal combustion engine parts and components JB/T 11323 Reliability Assessment Method for Small and Medium Power Diesel Engines QC/T 484-1999 Automobile paint coating

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