1、Internal combustion engines Piston ringsPart 1: Keystone rings made of cast ironBS ISO 6624-1:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Internal combustion engines Piston rings Part 1:Keystone rings made of cast ironMoteurs combustion interne Segme
2、nts de piston Partie 1: Segments trapzodaux en fonteINTERNATIONALSTANDARDISO6624-1Third edition2017-04Reference numberISO 6624-1:2017(E)National forewordThis British Standard is the UK implementation of ISO 6624-1:2017. It supersedes BS 5341-7.3.1:1992 which is withdrawn.The UK participation in its
3、preparation was entrusted to Technical Committee MCE/14/-/10, RIC engines - Cylinders, pistons and rings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users ar
4、e responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 89501 2ICS 43.060.10Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the
5、Standards Policy and Strategy Committee on 30 June 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 6624-1:2017 ISO 2017Internal combustion engines Piston rings Part 1: Keystone rings made of cast ironMoteurs combustion interne Segments de piston Partie 1:
6、Segments trapzodaux en fonteINTERNATIONAL STANDARDISO6624-1Third edition2017-04Reference numberISO 6624-1:2017(E)BS ISO 6624-1:2017ISO 6624-1:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part
7、of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body
8、 in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 6624-1:2017ISO 6624-1:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published i
9、n SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can
10、 be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 6624-1:2017(E)Foreword ivIntroduction v1 Sc
11、ope . 12 Normative reference . 13 Terms and definitions . 14 Overview . 15 Ring types and designation examples 15.1 Type T Straight faced keystone ring 6 . 15.1.1 General features 15.1.2 Designation . 25.2 Type TB Symmetrical barrel faced keystone ring 6 . 25.2.1 General features 25.2.2 Designation
12、. 45.3 Type TBA Asymmetrical barrel faced keystone ring 6 45.3.1 General features 45.3.2 Designation . 55.4 Type TM Taper faced keystone ring 6 55.4.1 General features 55.4.2 Designation . 65.5 Type K Straight faced keystone ring 15 75.5.1 General features 75.5.2 Designation . 75.6 Type KB Symmetric
13、al barrel faced keystone ring 15 . 75.6.1 General features 75.6.2 Designation . 85.7 Type KBA Asymmetrical barrel faced keystone ring 15 85.7.1 General features 85.7.2 Designation . 95.8 Type KM Taper faced keystone ring 15 95.8.1 General features 95.8.2 Designation 106 Common features 116.1 Type T,
14、 TB, TBA, TM, K, KB, KBA, KM rings Inside chamfered edges (KI) 116.2 Type T, TB, TBA, TM, K, KB, KBA, KM rings (positive twist type) internal bevel or internal step top side 116.3 Type TM or KM rings with partly cylindrical machined (LM) or lapped (LP) peripheral surface . 126.4 Type T, TB, TBA, TM,
15、 K, KB, KBA, KM rings Plating/coating configuration 136.4.1 Uncoated rings 136.4.2 Chromium plated, PVD coated or spray coated rings .147 Force factors .168 Dimensions 16Bibliography .24 ISO 2017 All rights reserved iiiContents PageBS ISO 6624-1:2017ISO 6624-1:2017(E)ForewordISO (the International O
16、rganization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been estab
17、lished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardizat
18、ion.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with
19、 the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
20、 patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorseme
21、nt.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
22、 www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34, Propulsion, powertrain and powertrain fluids.This third edition cancels and replaces the second edition (ISO 6624-1:2001), which has been technically revised.The main c
23、hanges compared to the previous edition are as follows: PVD coating thickness has been included with a new Table 8; updates have been made regarding technology improvements.iv ISO 2017 All rights reservedBS ISO 6624-1:2017ISO 6624-1:2017(E)ForewordISO (the International Organization for Standardizat
24、ion) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be r
25、epresented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to d
26、evelop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
27、ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified du
28、ring the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the
29、 voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ forewor
30、d .html.This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 34, Propulsion, powertrain and powertrain fluids.This third edition cancels and replaces the second edition (ISO 6624-1:2001), which has been technically revised.The main changes compared to the previ
31、ous edition are as follows: PVD coating thickness has been included with a new Table 8; updates have been made regarding technology improvements.iv ISO 2017 All rights reserved ISO 6624-1:2017(E)IntroductionISO 6624 belongs to the series of International Standards dealing with piston rings for recip
32、rocating internal combustion engines. Others are ISO 6621, ISO 6622, ISO 6623, ISO 6625, ISO 6626 and ISO 6627 (see Bibliography for details).The common features and dimensional tables presented in this document constitute a broad range of variables and, in selecting a particular ring type, the desi
33、gner must bear in mind the conditions under which it will be required to operate.It is also essential that the designer refer to the specifications and requirements of ISO 6621-34and ISO 6621-4 before completing a selection. ISO 2017 All rights reserved vBS ISO 6624-1:2017BS ISO 6624-1:2017Internal
34、combustion engines Piston rings Part 1: Keystone rings made of cast iron1 ScopeThis document specifies the essential dimensional features of keystone rings made of cast iron, types T, TB, TBA, TM, K, KB, KBA and KM, having diameters from 70 mm up to and including 200 mm, used in reciprocating intern
35、al combustion piston engines.2 Normative referenceThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the ref
36、erenced document (including any amendments) applies.ISO 6621-4, Internal combustion engines Piston rings Part 4: General specifications3 Terms and definitionsNo terms and definitions are listed in this document.ISO and IEC maintain terminological databases for use in standardization at the following
37、 addresses: IEC Electropedia: available at http:/ www .electropedia .org/ ISO Online browsing platform: available at http:/ www .iso .org/ obp4 OverviewThe keystone ring types are specified in Tables 1 to 3 and Figures 1 to 8. Their common features and the dimensions of those features are specified
38、in Tables 4 to 8 and Figures 9 to 16. Tables 9 and 10 give the force factors for the different types of ring, while Table 11 and Table 12 give the dimensions and forces of keystone rings 6 and 15, respectively.5 Ring types and designation examples5.1 Type T Straight faced keystone ring 65.1.1 Genera
39、l featuresSee Table 10 for dimensions and forces.INTERNATIONAL STANDARD ISO 6624-1:2017(E) ISO 2017 All rights reserved 1BS ISO 6624-1:2017ISO 6624-1:2017(E)Dimensions in millimetresKey1 reference planeaDue to manufacturing processing, side angle tolerances are not cumulative.bNominal.Figure 1 Type
40、T5.1.2 DesignationEXAMPLE Designation of a piston ring complying with the requirements of ISO 66241, being a cast iron, 6 keystone ring with a straight faced peripheral surface (T), of nominal diameter d1= 90 mm (90) and nominal width h1= 2,5 mm (2,5), made of grey cast iron, subclass 12 (MC12), and
41、 having a chromium plated peripheral surface with a minimum thickness of 0,1 mm (CR2). Parameters in parenthesis are used in the ISO ring designation:Piston ring ISO 6624-1 T-90 2,5-MC12/CR25.2 Type TB Symmetrical barrel faced keystone ring 65.2.1 General featuresSee Table 10 for dimensions and forc
42、es.2 ISO 2017 All rights reservedBS ISO 6624-1:2017ISO 6624-1:2017(E)Dimensions in millimetresKey1 reference planeaDue to manufacturing processing, side angle tolerances are not cumulative.bNominal.Figure 1 Type T5.1.2 DesignationEXAMPLE Designation of a piston ring complying with the requirements o
43、f ISO 66241, being a cast iron, 6 keystone ring with a straight faced peripheral surface (T), of nominal diameter d1= 90 mm (90) and nominal width h1= 2,5 mm (2,5), made of grey cast iron, subclass 12 (MC12), and having a chromium plated peripheral surface with a minimum thickness of 0,1 mm (CR2). P
44、arameters in parenthesis are used in the ISO ring designation:Piston ring ISO 6624-1 T-90 2,5-MC12/CR25.2 Type TB Symmetrical barrel faced keystone ring 65.2.1 General featuresSee Table 10 for dimensions and forces.2 ISO 2017 All rights reserved ISO 6624-1:2017(E)Dimensions in millimetresKey1 refere
45、nce planeaDue to manufacturing processing, side angle tolerances are not cumulative.bNominal.Figure 2 Type TBTable 1 Symmetrical barrel dimensionsDimensions in millimetresh1h25h26h27t2, t3h8aTolerance2,0 0,40 1,00 0,30 1,600,003.0,0151,22,5 0,45 1,25 0,40 2,05 1,63,0 0,50 1,500,502,500,005.0,0202,03
46、,5 0,55 1,75 2,95 2,44,0 0,60 2,000,603,400,005.0,0232,84,5 0,65 2,25 3,85 3,2aGauge width h8, informative only, shall be used only if agreed between manufacturer and customer. ISO 2017 All rights reserved 3BS ISO 6624-1:2017ISO 6624-1:2017(E)5.2.2 DesignationEXAMPLE Designation of a piston ring com
47、plying with the requirements of ISO 66241, being a cast iron, 6 keystone ring with a symmetrical barrel faced peripheral surface (TB), of nominal diameter d1= 90 mm (90) and nominal ring width h1= 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron, subclass 53 (MC53), and h
48、aving a semi-inlaid spray coating on the peripheral surface with a minimum thickness of 0,2 mm (SC4E). Parameters in parenthesis are used in the ISO ring designation:Piston ring ISO 6624-1 TB-90 2,5-MC53/SC4E5.3 Type TBA Asymmetrical barrel faced keystone ring 65.3.1 General featuresSee Table 10 for
49、 dimensions and forces.Dimensions in millimetresKey1 reference plane2 top side identification markaDue to manufacturing processing, side angle tolerances are not cumulative.bNominal.Figure 3 Type TBA4 ISO 2017 All rights reservedBS ISO 6624-1:2017ISO 6624-1:2017(E)5.2.2 DesignationEXAMPLE Designation of a piston ring complying with the requirements of ISO 66241, being a cast iron, 6 keystone ring with a symmetrical barrel f
