1、Internal combustion engines Piston rings Part 1: Keystone rings made of cast iron BS ISO 6624-1:2017 BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017 Internal combustion engines Piston rings Part 1: Keystone rings made of cast iron Moteurs combustion intern
2、e Segments de piston Partie 1: Segments trapzodaux en fonte INTERNATIONAL STANDARD ISO 6624-1 Third edition 2017-04 Reference number ISO 6624-1:2017(E) National foreword This British Standard is the UK implementation of ISO 6624-1:2017. It supersedes B S 5341-7.3.1:1992 which is withdrawn. The UK pa
3、rticipation in its 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
4、 a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017 ISBN 978 0 580 89501 2 ICS 43.060.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published un
5、der the authority of the Standards Policy and Strategy Committee on 30 June 2017. Amendments/corrigenda issued since publication Date Text affected BRITISH STANDARD BS ISO 6624-1:2017 ISO 2017 Internal combustion engines Piston rings Part 1: Keystone rings made of cast iron Moteurs combustion intern
6、e Segments de piston Partie 1: Segments trapzodaux en fonte INTERNATIONAL STANDARD ISO 6624-1 Third edition 2017-04 Reference number ISO 6624-1:2017(E) BS ISO 6624-1:2017 ISO 6624-1:2017(E)ii ISO 2017 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzerland All rights rese
7、rved. 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 be requested from either IS
8、O at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org BS ISO 6624-1:2017 ISO 6624-1:2017(E)ii ISO 2017 All rights reserve
9、d COPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in Switzerland All 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 intra
10、net, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.or
11、g www.iso.orgISO 6624-1:2017(E)Foreword iv Introduction v 1 Scope . 1 2 Normative reference . 1 3 T erms and definitions . 1 4 Overview . 1 5 Ring types and designation examples 1 5.1 Type T Straight faced keystone ring 6 . 1 5.1.1 General features 1 5.1.2 Designation . 2 5.2 Type TB Symmetrical bar
12、rel faced keystone ring 6 . 2 5.2.1 General features 2 5.2.2 Designation . 4 5.3 Type TBA Asymmetrical barrel faced keystone ring 6 4 5.3.1 General features 4 5.3.2 Designation . 5 5.4 Type TM Taper faced keystone ring 6 5 5.4.1 General features 5 5.4.2 Designation . 6 5.5 Type K Straight faced keys
13、tone ring 15 7 5.5.1 General features 7 5.5.2 Designation . 7 5.6 Type KB Symmetrical barrel faced keystone ring 15 . 7 5.6.1 General features 7 5.6.2 Designation . 8 5.7 Type KBA Asymmetrical barrel faced keystone ring 15 8 5.7.1 General features 8 5.7.2 Designation . 9 5.8 Type KM Taper faced keys
14、tone ring 15 9 5.8.1 General features 9 5.8.2 Designation 10 6 Common features 11 6.1 Type T , TB, TBA, TM, K, KB, KBA, KM rings Inside chamfered edges (KI) 11 6.2 Type T , TB, TBA, TM, K, KB, KBA, KM rings (positive twist type) internal bevel or internal step top side 11 6.3 Type TM or KM rings wit
15、h partly cylindrical machined (LM) or lapped (LP) peripheral surface .12 6.4 Type T , TB, TBA, TM, K, KB, KBA, KM rings Plating/coating configuration 13 6.4.1 Uncoated rings 13 6.4.2 Chromium plated, PVD coated or spray coated rings .14 7 Force factors .16 8 Dimensions 16 Bibliography .24 ISO 2017 A
16、ll rights reserved iii Contents Page BS ISO 6624-1:2017 ISO 6624-1:2017(E) Foreword ISO (the International Organization 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 t
17、echnical committees. Each member body interested in a subject for which a technical committee has been established 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 clos
18、ely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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
19、needed for the different types of ISO documents should be noted. This document was drafted in accordance with 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
20、patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any 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 na
21、me used in this document is information given for the convenience of users and does not constitute an endorsement. 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
22、to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: 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 thir
23、d edition cancels and replaces the second edition (ISO 6624-1:2001), which has been technically revised. The main changes 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
24、All rights reserved BS ISO 6624-1:2017 ISO 6624-1:2017(E) Foreword ISO (the International Organization 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 committe
25、es. Each member body interested in a subject for which a technical committee has been established 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 Inte
26、rnational Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. 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 di
27、fferent types of ISO documents should be noted. This document was drafted in accordance with 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. IS
28、O shall not be held responsible for identifying any or all such patent rights. Details of any 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 d
29、ocument is information given for the convenience of users and does not constitute an endorsement. 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 Trad
30、e Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: 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
31、 and replaces the second edition (ISO 6624-1:2001), which has been technically revised. The main changes 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 reserv
32、ed ISO 6624-1:2017(E) Introduction ISO 6624 belongs to the series of International Standards dealing with piston rings for reciprocating 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 dimen
33、sional tables presented in this document constitute a broad range of variables and, in selecting a particular ring type, the designer 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 IS
34、O 6621-3 4and ISO 6621-4 before completing a selection. . ISO 2017 All rights reserved v BS ISO 6624-1:2017BS ISO 6624-1:2017 Internal combustion engines Piston rings Part 1: Keystone rings made of cast iron 1 Scope This document specifies the essential dimensional features of keystone rings made of
35、 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 internal combustion piston engines. 2 Normative reference The following documents are referred to in the text in such a way that some or all of their content constitutes
36、 requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6621-4, Internal combustion engines Piston rings Part 4: General specifications 3 T erms an d definiti o
37、ns No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp 4 O
38、verview The 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 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 t
39、he dimensions and forces of keystone rings 6 and 15, respectively. 5 Ring types and designation examples 5.1 Type T Straight faced keystone ring 6 5.1.1 General features See Table 10 for dimensions and forces. INTERNATIONAL ST ANDARD ISO 6624-1:2017(E) ISO 2017 All rights reserved 1 BS ISO 6624-1:20
40、17 ISO 6624-1:2017(E) Dimensions in millimetres Key 1 reference plane a Due to manufacturing processing, side angle tolerances are not cumulative. b Nominal. Figure 1 Type T 5.1.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO 66241, being a cast iron, 6 keys
41、tone ring with a straight faced peripheral surface (T), of nominal diameter d 1= 90 mm (90) and nominal width h 1= 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). Parameters in parenthesis are used in
42、 the ISO ring designation:Piston ring ISO 6624-1 T-90 2,5-MC12/CR2 5.2 Type TB Symmetrical barrel faced keystone ring 6 5.2.1 General features See Table 10 for dimensions and forces.2 ISO 2017 All rights reserved BS ISO 6624-1:2017 ISO 6624-1:2017(E) Dimensions in millimetres Key 1 reference plane a
43、 Due to manufacturing processing, side angle tolerances are not cumulative. b Nominal. Figure 1 Type T 5.1.2 Designation EXAMPLE 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 diam
44、eter d 1= 90 mm (90) and nominal width h 1= 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). Parameters in parenthesis are used in the ISO ring designation:Piston ring ISO 6624-1 T-90 2,5-MC12/CR2 5.2
45、Type TB Symmetrical barrel faced keystone ring 6 5.2.1 General features See Table 10 for dimensions and forces.2 ISO 2017 All rights reserved ISO 6624-1:2017(E) Dimensions in millimetres Key 1 reference plane a Due to manufacturing processing, side angle tolerances are not cumulative. b Nominal. Fig
46、ure 2 Type TB Table 1 Symmetrical barrel dimensions Dimensions in millimetres h 1 h 25 h 26 h 27 t 2 , t 3 h 8a Tolerance 2,0 0,40 1,00 0,30 1,60 0,003.0,015 1,2 2,5 0,45 1,25 0,40 2,05 1,6 3,0 0,50 1,50 0,50 2,50 0,005.0,020 2,0 3,5 0,55 1,75 2,95 2,4 4,0 0,60 2,00 0,60 3,40 0,005.0,023 2,8 4,5 0,6
47、5 2,25 3,85 3,2 aGauge width h 8 , informative only, shall be used only if agreed between manufacturer and customer. ISO 2017 All rights reserved 3 BS ISO 6624-1:2017 ISO 6624-1:2017(E) 5.2.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO 66241, being a cast
48、iron, 6 keystone ring with a symmetrical barrel faced peripheral surface (TB), of nominal diameter d 1= 90 mm (90) and nominal ring width h 1= 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron, subclass 53 (MC53), and having a semi-inlaid spray coating on the peripheral su
49、rface 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/SC4E 5.3 Type TBA Asymmetrical barrel faced keystone ring 6 5.3.1 General features See Table 10 for dimensions and forces. Dimensions in millimetres Key 1 reference plane 2 top side identification mark a Due to manufacturing processing, side angle tolerances are not cumulative.
