1、BSI Standards PublicationBS ISO 6622-2:2013Internal combustion engines Piston ringsPart 2: Rectangular rings made of steelBS ISO 6622-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 6622-2:2013. Itsupersedes BS ISO 6622-2:2003 which is withdrawn.The UK p
2、articipation in its preparation was entrusted to TechnicalCommittee MCE/14/-/10, RIC engines - Cylinders, pistons and rings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a c
3、ontract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69379 3ICS 43.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the au
4、thority of theStandards Policy and Strategy Committee on 30 November 2013.Amendments issued since publicationDate Text affectedBS ISO 6622-2:2013 ISO 2013Internal combustion engines Piston rings Part 2: Rectangular rings made of steelMoteurs combustion interne Segments de piston Partie 2: Segments r
5、ectangulaires en acierINTERNATIONAL STANDARDISO6622-2Second edition2013-11-01Reference numberISO 6622-2:2013(E)BS ISO 6622-2:2013ISO 6622-2:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be r
6、eproduced 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 in the country of the reque
7、ster.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 6622-2:2013ISO 6622-2:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative referen
8、ces 13 Overview . 14 Ring types and designation examples 14.1 Type R Straight-faced rectangular ring 14.2 Type B Barrel-faced rectangular ring . 24.3 Type BA Asymmetrical barrel-faced rectangular ring, h1 1,2mm . 44.4 Type M Taper-faced rectangular ring . 55 Common features . 65.1 Type R Straight-fa
9、ced rectangular ring 65.2 Type B Barrel-faced rectangular ring . 75.3 Type BA Asymmetrical barrel-faced rectangular ring, h1 1,2 mm 85.4 Type M Taper-faced rectangular ring . 95.5 Type R, B, BA, and M rings (positive twist type) Internal bevel top side 115.6 Type M rings (negative twist type), taper
10、 M3 to M5 Internal bevel bottom side 115.7 Type R, B, BA, and M rings Outside and inside rounded edges .125.8 Type R, B, BA, and M rings (fully faced and inlaid) Plating/coating thickness 125.9 Type R, B, BA, and M rings Nitrided case depth .136 Force factors .147 Dimensions and forces 14Bibliograph
11、y .21BS ISO 6622-2:2013ISO 6622-2:2013(E)ForewordISO (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 committees. Each member bo
12、dy 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 International Electrot
13、echnical 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 different types of IS
14、O documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention 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 responsib
15、le 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/patentsAny trade name used in this document is information given for the co
16、nvenience 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 technically revised.ISO 6622 consists of the following parts, under the gene
17、ral 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)IntroductionThe ISO 6622 series is one of a number of series of International Standards dealing with p
18、iston rings for reciprocating internal combustion engines. Others are ISO 6621,2 3 4 5ISO 6623,6ISO 6624,78910ISO 6625, ISO 6626,1213 14and ISO 662715(see Bibliography for details).The common features and dimensional tables presented in this part of ISO 6622 constitute a broad range of variables and
19、, 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 ISO 6621-34and ISO 6621-416before completing his selection. ISO 2013 All rights reser
20、ved vBS ISO 6622-2:2013BS ISO 6622-2:2013Internal combustion engines Piston rings Part 2: Rectangular rings made of steel1 ScopeThis part of ISO 6622 specifies the essential dimensional features of rectangular rings made of steel, types R, B, BA, and M having nominal diameters from 30 mm up to and i
21、ncluding 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the
22、 edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.Not applicable.3 OverviewThe rectangular ring types are specified in Tables 1 to 5 and Figures 1 to 6. Their common features and the dimensions of those features are speci
23、fied 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 designation examples4.1 Type R Straight-faced rectangular ring4.1.1 General featuresFigure 1 show
24、s the general features of piston ring type R.See Table 13 for dimensions and forces.INTERNATIONAL STANDARD ISO 6622-2:2013(E) ISO 2013 All rights reserved 1BS ISO 6622-2:2013ISO 6622-2:2013(E)Key1 reference planeat = 0,005 h1.Figure 1 Type R4.1.2 DesignationEXAMPLE Designation of a piston ring compl
25、ying 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 d1= 60 mm (60), of nominal ring width h1= 1,2 mm (1,2), made of CrSi alloyed steel, subclass 62 (MC62), and with a chromium-plated p
26、eripheral 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/CR24.2 Type B Barrel-faced rectangular ring4.2.1 General featuresSee Table 13 for dimensions and forces.2 ISO 2013 All rights reservedBS ISO
27、6622-2:2013ISO 6622-2:2013(E)Key1 reference planeFigure 2 Type BTable 1 Symmetrical barrel dimensions and gauge width (h8)Dimensions in millimetresh1h25h26h26tol. h27t2, t3h8a0,8 0,20 0,40 0,15 0,60 0,001.0,010 0,401,0 0,25 0,50 0,15 0,75 0,001.0,011 0,501,2 0,30 0,60 0,20 0,90 0,002.0,012 0,601,5 0
28、,35 0,75 0,25 1,150,003.0,0150,801,75 0,35 0,85 0,30 1,35 1,002,0 0,40 1,00 0,30 1,60 1,202,5 0,45 1,25 0,40 2,05 1,603,0 0,50 1,50 0,50 2,500,005.0,0202,003,5 0,55 1,75 0,50 2,95 2,40aGauge width (h8) only informative; may be used only if agreed between manufacturer and customer.4.2.2 DesignationEX
29、AMPLE 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 barrel-faced peripheral surface (B), of nominal diameter d1= 60 mm (60), of nominal ring width h1= 1,5 mm (1,5), made of martensitic steel (17 % Cr), s
30、ubclass 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 with 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
31、 ISO 2013 All rights reserved 3BS ISO 6622-2:2013ISO 6622-2:2013(E)4.3 Type BA Asymmetrical barrel-faced rectangular ring, h1 1,2mm4.3.1 General featuresSee Table 13 for dimensions and forces.Key1 reference plane2 top side identification markFigure 3 Type BATable 2 Asymmetrical barrel dimensionsDime
32、nsions in millimetresh1h25ah26h26tol. h27t2bt3b1,20,20 c0,35 c 0,150,80 c0.0,005 0,005.0,0160,28 0,43 0,901,5 0,35 0,50 0,15 1,15 00,006 0,0070,0221,75 0,35 0,55 0,201,3500,0070,0080,0252,0 0,40 0,60 1,50 0,0090,0302,5 0,45 0,70 0,251,8000,0080,0110,0353,0 0,55 0,80 2,10 0,0120,0383,5 0,60 0,90 0,30
33、 2,40 00,009 0,0120,040ah25may be lowered for rings with reduced edge dimensions.bt2and/or t3may 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 DesignationEXAMPLE Designati
34、on 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 an asymmetrical barrel-faced peripheral surface (BA), of nominal diameter d1= 80 mm (80), of nominal ring width h1= 1,5 mm (1,5), made of martensitic steel (17 % Cr), s
35、ubclass 66 (MC66), nitrided on the peripheral surface and side faces (NT) to a depth of 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
36、4.4 Type M Taper-faced rectangular ringNOTE Taper M1 excluded.4.4.1 General featuresSee Table 13 for dimensions and forces.Key1 reference plane2 top side identification markFigure 4 Type M ISO 2013 All rights reserved 5BS ISO 6622-2:2013ISO 6622-2:2013(E)Table 3 TaperDimensions in millimetresCodeNit
37、rided rings and chromium-plated or spray-coated rings with peripheral surface groundcTaper Tolerancewith IFa(top side) with IFUa d(bottom side)Taper Tolerance Taper TolerancebM2 30060+30060+ M3 60 60 60060+M4 90 90 90M5 120 120 120aIF and IFU are explained in Figures 24 and 25.bFor M rings (negative
38、 twist type) M3, M4, and M5, the twist angle should not exceed 90 % 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: 060+for M rings or 070+for M rings with IF or IFU).dIFU not recommended for ring
39、s with h1 1,2 mm.4.4.2 DesignationEXAMPLE 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 60 taper-faced peripheral surface (M3), of nominal diameter d1= 60 mm (60), of nominal ring width h1= 1,5 mm (1,5), m
40、ade of alloyed steel (CrSi), subclass 62 (MC62), with a chromium-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/CR25 Common features5.1 Type R Straight-faced rectangular ring5.
41、1.1 Nitrided/PVD ringsKey1 top side identification markFigure 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 rings5.1.2.1 Fully facedKey1 top side identification markFigure 6 Fully faced type R rings5.1.2.2 Inlaid, h
42、1 1,2 mm (not recommended for chromium-plated rings)Key1 top side identification markFigure 7 Inlaid type R rings5.2 Type B Barrel-faced rectangular ring5.2.1 Nitrided/PVD ringsKey1 top side identification markFigure 8 Nitrided/PVD type B rings ISO 2013 All rights reserved 7BS ISO 6622-2:2013ISO 662
43、2-2:2013(E)5.2.2 Chromium-plated or spray-coated rings5.2.2.1 Fully facedKey1 top side identification markFigure 9 Fully faced type B rings5.2.2.2 Inlaid, h1 1,2 mm (not recommended for chromium-plated rings)Key1 top side identification markFigure 10 Inlaid type B rings5.3 Type BA Asymmetrical barre
44、l-faced rectangular ring, h1 1,2 mm5.3.1 Nitrided/PVD ringsKey1 top side identification markFigure 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 rings5.3.2.1 Fully facedKey1 top side identification markFigure 12 F
45、ully faced type BA rings5.3.2.2 Inlaid, h1 1,2 mm (not recommended for chromium-plated rings)Key1 top side identification markFigure 13 Inlaid type BA rings5.4 Type M Taper-faced rectangular ring5.4.1 Fully tapered5.4.1.1 Uncoated/Nitrided/PVD ringsKey1 top side identification markFigure 14 Uncoated
46、/Nitrided/PVD 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 rings5.4.1.2.1 Fully facedKey1 top side identification markFigure 15 Fully faced type M rings5.4.1.2.2 Inlaid, h1 1,2 mm (not recommended for chromium-plated rings)Key
47、1 top side identification markFigure 16 Inlaid type M rings5.4.2 Taper-faced rectangular ring with partly cylindrical machined (LM) or lapped (LP) pe-ripheral surfaceKey1 top side identification markFigure 17 Partly cylindrical or lapped type M rings10 ISO 2013 All rights reservedBS ISO 6622-2:2013I
48、SO 6622-2:2013(E)Table 4 Axial dimensions of the cylindrical part of peripheral surface h24Dimensions in millimetresh1h24amax.h24max. each side of gap up to 301,0 0,4 0,71,2 0,4 0,81,5 0,5 1,01,75 0,6 1,22,0 0,7 1,42,5 0,8 1,63,0 1,0 2,03,5 1,2 2,3aPartly cylindrical peripheral surface shall be visi
49、ble.5.5 Type R, B, BA, and M rings (positive twist type) Internal bevel top sidea) Commonly used in rings with h1 1,2 mm b) Commonly used in rings with h1 1,2 mmFigure 18 Internal bevel (IF)5.6 Type M rings (negative twist type), taper M3 to M5 Internal bevel bottom sideSee Table 3.Figure 19 Internal bevel bottom side (IFU) ISO 2013 All rig
