1、BSI Standards Publication BS ISO 6622-2:2013 Internal combustion engines Piston rings Part 2: Rectangular rings made of steelBS ISO 6622-2:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 6622-2:2013. It supersedes BS ISO 6622-2:2003 which is withdrawn. T
2、he UK participation 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 provi
3、sions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 69379 3 ICS 43.060.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was pub
4、lished under the authority of the Standards Policy and Strategy Committee on 30 November 2013. Amendments issued since publication Date Text affectedBS ISO 6622-2:2013 ISO 2013 Internal combustion engines Piston rings Part 2: Rectangular rings made of steel Moteurs combustion interne Segments de pis
5、ton Partie 2: Segments rectangulaires en acier INTERNATIONAL STANDARD ISO 6622-2 Second edition 2013-11-01 Reference number ISO 6622-2:2013(E)BS ISO 6622-2:2013ISO 6622-2:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2013 All rights reserved. Unless otherwise specified, no
6、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 ISO at the address below or ISOs member
7、 body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in SwitzerlandBS ISO 6622-2:2013ISO 6622-2:2013(E) ISO 2013 All rights reserved iii Contents Page Foreword iv I
8、ntroduction v 1 Scope . 1 2 Normative references 1 3 Overview . 1 4 Ring types and designation examples 1 4.1 Type R Straight-faced rectangular ring 1 4.2 Type B Barrel-faced rectangular ring . 2 4.3 Type BA Asymmetrical barrel-faced rectangular ring, h 1 1,2mm . 4 4.4 Type M Taper-faced rectangular
9、 ring . 5 5 Common features . 6 5.1 Type R Straight-faced rectangular ring 6 5.2 Type B Barrel-faced rectangular ring . 7 5.3 Type BA Asymmetrical barrel-faced rectangular ring, h 1 1,2 mm 8 5.4 Type M Taper-faced rectangular ring . 9 5.5 Type R, B, BA, and M rings (positive twist type) Internal bev
10、el top side . .11 5.6 Type M rings (negative twist type), taper M3 to M5 Internal bevel bottom side 11 5.7 Type R, B, BA, and M rings Outside and inside rounded edges .12 5.8 Type R, B, BA, and M rings (fully faced and inlaid) Plating/coating thickness 12 5.9 Type R, B, BA, and M rings Nitrided case
11、 depth .13 6 Force factors .14 7 Dimensions and forces 14 Bibliography .21BS ISO 6622-2:2013ISO 6622-2:2013(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 i
12、s 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 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take par
13、t in the work. ISO collaborates closely 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 particu
14、lar 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 ISO/IEC Directives, Part 2. www.iso.org/directives Attention is drawn to the possibility that some of the elements of this docu
15、ment 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 during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/pa
16、tents Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. The committee responsible for this document is ISO/TC 22, Road vehicles. This second edition cancels and replaces the first edition (ISO 6622-2:2003), which has been t
17、echnically revised. ISO 6622 consists of the following parts, under the general title Internal combustion engines Piston rings: Part 1: Rectangular rings made of cast iron Part 2: Regular rings made of steeliv ISO 2013 All rights reservedBS ISO 6622-2:2013ISO 6622-2:2013(E) Introduction The ISO 6622
18、 series is one of a number of series of International Standards dealing with piston rings for reciprocating internal combustion engines. Others are ISO 6621, 2 3 4 5ISO 6623, 6ISO 6624, 78910ISO 6625, ISO 6626, 1213 14and ISO 6627 15(see Bibliography for details). The common features and dimensional
19、 tables presented in this part of ISO 6622 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
20、ISO 6621-3 4and ISO 6621-4 16before completing his selection. ISO 2013 All rights reserved vBS ISO 6622-2:2013BS ISO 6622-2:2013Internal combustion engines Piston rings Part 2: Rectangular rings made of steel 1 Scope This part of ISO 6622 specifies the essential dimensional features of rectangular r
21、ings made of steel, types R, B, BA, and M having nominal diameters from 30 mm up to and including 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications. 2 Normative references The following documents, in whole or in part, are normatively referenced
22、 in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Not applicable. 3 Overview The rectangular ring types are specified in Tables 1
23、 to 5 and Figures 1 to 6. Their common features and the dimensions of those features are specified in Tables 6 to 11 and Figures 7 to 22. Tables 12 and 13 give the force factors for the different ring types, while Table 13 gives the dimensions and forces of the rectangular rings. 4 Ring types and de
24、signation examples 4.1 Type R Straight-faced rectangular ring 4.1.1 General features Figure 1 shows the general features of piston ring type R. See Table 13 for dimensions and forces. INTERNATIONAL ST ANDARD ISO 6622-2:2013(E) ISO 2013 All rights reserved 1BS ISO 6622-2:2013ISO 6622-2:2013(E) Key 1
25、reference plane a t = 0,005 h 1 . Figure 1 Type R 4.1.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of this part of ISO 6622 (i.e. ISO 6622-2) being a steel, rectangular ring with a straight-faced peripheral surface (R), of nominal diameter d 1= 60 mm (60), of no
26、minal ring width h 1= 1,2 mm (1,2), made of CrSi alloyed steel, subclass 62 (MC62), and with a chromium-plated peripheral surface of a minimum thickness 0,1 mm (CR2). Parameters in parenthesis are used in the ISO ring designation: Piston ring ISO 6622-2 R - 60 1,2 - MC62/CR2 4.2 Type B Barrel-faced
27、rectangular ring 4.2.1 General features See Table 13 for dimensions and forces.2 ISO 2013 All rights reservedBS ISO 6622-2:2013ISO 6622-2:2013(E) Key 1 reference plane Figure 2 Type B Table 1 Symmetrical barrel dimensions and gauge width (h 8 ) Dimensions in millimetres h 1 h 25 h 26 h 26tol. h 27 t
28、 2 , t 3 h 8 a 0,8 0,20 0,40 0,15 0,60 0,001.0,010 0,40 1,0 0,25 0,50 0,15 0,75 0,001.0,011 0,50 1,2 0,30 0,60 0,20 0,90 0,002.0,012 0,60 1,5 0,35 0,75 0,25 1,15 0,003.0,015 0,80 1,75 0,35 0,85 0,30 1,35 1,00 2,0 0,40 1,00 0,30 1,60 1,20 2,5 0,45 1,25 0,40 2,05 1,60 3,0 0,50 1,50 0,50 2,50 0,005.0,0
29、20 2,00 3,5 0,55 1,75 0,50 2,95 2,40 aGauge width (h 8 ) only informative; may be used only if agreed between manufacturer and customer. 4.2.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of this part of ISO 6622 (i.e. ISO 6622-2) being a steel, rectangular ring w
30、ith a barrel-faced peripheral surface (B), of nominal diameter d 1= 60 mm (60), of nominal ring width h 1= 1,5 mm (1,5), made of martensitic steel (17 % Cr), subclass 66 (MC66), nitrided on the peripheral surface and side faces (NT), to a depth of 0,03 mm min. on the peripheral surface (030), and wi
31、th an associated side face depth of 0,010 mm min. Parameters in parenthesis are used in the ISO ring designation: Piston ring ISO 6622-2 B - 60 1,5 - MC66/NT030 ISO 2013 All rights reserved 3BS ISO 6622-2:2013ISO 6622-2:2013(E) 4.3 Type BA Asymmetrical barrel-faced rectangular ring, h 1 1,2mm 4.3.1
32、General features See Table 13 for dimensions and forces. Key 1 reference plane 2 top side identification mark Figure 3 Type BA Table 2 Asymmetrical barrel dimensions Dimensions in millimetres h 1 h 25 a h 26 h 26tol. h 27 t 2 b t 3 b 1,2 0,20 c 0,35 c 0,15 0,80 c 0.0,005 0,005.0,016 0,28 0,43 0,90 1
33、,5 0,35 0,50 0,15 1,15 00,006 0,0070,022 1,75 0,35 0,55 0,20 1,35 00,007 0,0080,025 2,0 0,40 0,60 1,50 0,0090,030 2,5 0,45 0,70 0,25 1,80 00,008 0,0110,035 3,0 0,55 0,80 2,10 0,0120,038 3,5 0,60 0,90 0,30 2,40 00,009 0,0120,040 ah 25may be lowered for rings with reduced edge dimensions. bt 2and/or t
34、 3may be varied as agreed between manufacturer and customer. cRecommended for bottom edge smaller than 0,2 mm.4 ISO 2013 All rights reservedBS ISO 6622-2:2013ISO 6622-2:2013(E) 4.3.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of this part of ISO 6622 (i.e. ISO 6
35、622-2) being a steel, rectangular ring with an asymmetrical barrel-faced peripheral surface (BA), of nominal diameter d 1= 80 mm (80), of nominal ring width h 1= 1,5 mm (1,5), made of martensitic steel (17 % Cr), subclass 66 (MC66), nitrided on the peripheral surface and side faces (NT) to a depth o
36、f 0,05 mm min. on the peripheral surface (050), and with an associated side face depth of 0,015 mm min. Parameters in parenthesis are used in the ISO ring designation: Piston ring ISO 6622-2 BA - 80 1,5 - MC66/NT050 4.4 Type M Taper-faced rectangular ring NOTE Taper M1 excluded. 4.4.1 General featur
37、es See Table 13 for dimensions and forces. Key 1 reference plane 2 top side identification mark Figure 4 Type M ISO 2013 All rights reserved 5BS ISO 6622-2:2013ISO 6622-2:2013(E) Table 3 Taper Dimensions in millimetres Code Nitrided rings and chromium-plated or spray-coated rings with peripheral sur
38、face ground c Taper Tolerance with IF a(top side) with IFU a d(bottom side) Taper Tolerance Taper Tolerance b M2 30 + 30 + M3 60 60 60 + M4 90 90 90 M5 120 120 120 aIF and IFU are explained in Figures 24 and 25. bFor M rings (negative twist type) M3, M4, and M5, the twist angle should not exceed 90
39、% of the minimum taper angle. cFor chromium plated rings with tapered peripheral surface not ground, the tolerance shall be increased by 10 (e.g. M3 = 60: +for M rings or +for M rings with IF or IFU). dIFU not recommended for rings with h 1 1,2 mm. 4.4.2 Designation EXAMPLE Designation of a piston r
40、ing complying with the requirements of this part of ISO 6622 (i.e. ISO 6622-2) being a steel, rectangular ring with 60 taper-faced peripheral surface (M3), of nominal diameter d 1= 60 mm (60), of nominal ring width h 1= 1,5 mm (1,5), made of alloyed steel (CrSi), subclass 62 (MC62), with a chromium-
41、plated peripheral surface of a minimum thickness of 0,1 mm (CR2). Parameters in parenthesis are used in the ISO ring designation: Piston ring ISO 6622-2 M3 - 60 1,5 - MC62/CR2 5 Common features 5.1 Type R Straight-faced rectangular ring 5.1.1 Nitrided/PVD rings Key 1 top side identification mark Fig
42、ure 5 Nitrided/PVD type R rings6 ISO 2013 All rights reservedBS ISO 6622-2:2013ISO 6622-2:2013(E) 5.1.2 Chromium-plated or spray-coated rings 5.1.2.1 Fully faced Key 1 top side identification mark Figure 6 Fully faced type R rings 5.1.2.2 Inlaid, h 1 1,2 mm (not recommended for chromium-plated rings
43、) Key 1 top side identification mark Figure 7 Inlaid type R rings 5.2 Type B Barrel-faced rectangular ring 5.2.1 Nitrided/PVD rings Key 1 top side identification mark Figure 8 Nitrided/PVD type B rings ISO 2013 All rights reserved 7BS ISO 6622-2:2013ISO 6622-2:2013(E) 5.2.2 Chromium-plated or spray-
44、coated rings 5.2.2.1 Fully faced Key 1 top side identification mark Figure 9 Fully faced type B rings 5.2.2.2 Inlaid, h 1 1,2 mm (not recommended for chromium-plated rings) Key 1 top side identification mark Figure 10 Inlaid type B rings 5.3 Type BA Asymmetrical barrel-faced rectangular ring, h 1 1,
45、2 mm 5.3.1 Nitrided/PVD rings Key 1 top side identification mark Figure 11 Nitrided/PVD type BA rings8 ISO 2013 All rights reservedBS ISO 6622-2:2013ISO 6622-2:2013(E) 5.3.2 Chromium-plated or spray-coated rings 5.3.2.1 Fully faced Key 1 top side identification mark Figure 12 Fully faced type BA rin
46、gs 5.3.2.2 Inlaid, h 1 1,2 mm (not recommended for chromium-plated rings) Key 1 top side identification mark Figure 13 Inlaid type BA rings 5.4 Type M Taper-faced rectangular ring 5.4.1 Fully tapered 5.4.1.1 Uncoated/Nitrided/PVD rings Key 1 top side identification mark Figure 14 Uncoated/Nitrided/P
47、VD type M rings ISO 2013 All rights reserved 9BS ISO 6622-2:2013ISO 6622-2:2013(E) 5.4.1.2 Chromium-plated or spray-coated rings 5.4.1.2.1 Fully faced Key 1 top side identification mark Figure 15 Fully faced type M rings 5.4.1.2.2 Inlaid, h 1 1,2 mm (not recommended for chromium-plated rings) Key 1
48、top side identification mark Figure 16 Inlaid type M rings 5.4.2 Taper-faced rectangular ring with partly cylindrical machined (LM) or lapped (LP) pe- ripheral surface Key 1 top side identification mark Figure 17 Partly cylindrical or lapped type M rings10 ISO 2013 All rights reservedBS ISO 6622-2:2
49、013ISO 6622-2:2013(E) Table 4 Axial dimensions of the cylindrical part of peripheral surface h 24 Dimensions in millimetres h 1 h 24 amax. h 24max. each side of gap up to 30 1,0 0,4 0,7 1,2 0,4 0,8 1,5 0,5 1,0 1,75 0,6 1,2 2,0 0,7 1,4 2,5 0,8 1,6 3,0 1,0 2,0 3,5 1,2 2,3 aPartly cylindrical peripheral surface shall
