1、BSI Standards PublicationBS ISO 6626-2:2013Internal combustion engines Piston ringsPart 2: Coil-spring-loaded oil control ringsof narrow width made of cast ironBS ISO 6626-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 6626-2:2013.The UK participation i
2、n 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 contract. Users
3、 are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69380 9ICS 43.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the
4、Standards Policy and Strategy Committee on 31 August 2013.Amendments issued since publicationDate Text affectedBS ISO 6626-2:2013 ISO 2013Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast ironMoteurs combustion interne Segments de pist
5、on Partie 2: Segments racleurs rgulateurs dhuile troits, en fonte, mis en charge par ressort hlicodalINTERNATIONAL STANDARDISO6626-2Second edition2013-08-01Reference numberISO 6626-2:2013(E)BS ISO 6626-2:2013ISO 6626-2:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All ri
6、ghts 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 be requested from
7、either ISO at the address below or ISOs member body in the country of the requester.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 6626-2:2013ISO 6626-2:2013(E) ISO 2013 All rights r
8、eserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Overview . 14 Piston ring types and designation 24.1 DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP types 24.2 Type DSF-C Coil-spring-loaded bevelled edge oil control ring, chromium-plated, and profile ground 24.3
9、 Type DSF-CNP Coil-spring-loaded bevelled-edge oil control ring, chromium-plated not profile ground 34.4 Type SSF Coil-spring-loaded slotted oil control ring 44.5 Type GSF Coil-spring-loaded double bevelled oil control ring . 54.6 Type DSF Coil-spring-loaded bevelled edge oil control ring 64.7 Type
10、DSF-NG Coil-spring-loaded bevelled-edge oil control ring (face geometry similar to type DSF-C) 74.8 Type SSF-L Coil-spring-loaded slotted oil control ring with 0,4 mm nominal land width . 85 Common features . 95.1 Oil drainage by slots or holes . 95.2 Plating thickness DSF-C and DSF-CNP (coil-spring
11、-loaded bevelled edge oil control ring, chromium plated) . 115.3 Peripheral edges at gap of chromium plated oil control rings126 Coil springs 126.1 Types of coil spring 126.2 Coil spring excursion (extended gap) . 146.3 Position of coil spring gap and fixing 146.4 Material 147 Tangential force and n
12、ominal contact pressure .147.1 Tangential force . 147.2 Force factors . 147.3 Tangential force, Ft.157.4 Classes of nominal contact pressure, po158 Dimensions and tangential forces .17Bibliography .36BS ISO 6626-2:2013ISO 6626-2:2013(E)ForewordISO (the International Organization for Standardization)
13、 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 repre
14、sented 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 devel
15、op 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 ISO/
16、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 responsible for identifying any or all such patent rights. Details of any patent rights identified during the deve
17、lopment 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 convenience of users and does not constitute an endorsement.The committee responsible for this document is
18、ISO/TC 22, Road vehicles.This second edition cancels and replaces the first edition (ISO 6626-2:2003), which has been technically revised.ISO 6626 consists of the following parts, under the general title Internal combustion engines Piston rings: Part 2: Coil-spring-loaded oil control rings of narrow
19、 width made of cast iron Part 3: Coil-spring-loaded oil control rings made of steelISO 6626:1989 (Internal combustion engines Piston rings Coil-spring-loaded oil control rings) is to be withdrawn and replaced with a part 1 (i.e. a revision) at a later date.iv ISO 2013 All rights reservedBS ISO 6626-
20、2:2013ISO 6626-2:2013(E)IntroductionISO 6626 (all parts) is one of a series of International Standards dealing with piston rings for reciprocating internal combustion engines. The others are ISO 6621 (all parts), ISO 6622 (all parts),2ISO 6623,3ISO 6624 (all parts),4ISO 66255and ISO 6627.6 ISO 2013
21、All rights reserved vBS ISO 6626-2:2013BS ISO 6626-2:2013Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron1 ScopeThis part of ISO 6626 specifies the essential dimensional features of coil-spring-loaded oil control rings made of ca
22、st iron, types DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP. It is applicable to those piston rings in sizes 60 mm to 110 mm, inclusive, for reciprocating internal combustion engines for road vehicles and other applications.2 Normative referencesThe following documents, in whole or in part, are n
23、ormatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 6621-2, Internal combustion engines Piston rings Part 2:
24、 Inspection measuring principlesISO 6621-3, Internal combustion engines Piston rings Part 3: Material specificationsISO 6621-4, Internal combustion engines Piston rings Part 4: General specificationsISO 6621-5, Internal combustion engines Piston rings Part 5: Quality requirements3 OverviewThe coil-s
25、pring-loaded oil control ring types are specified in Figures 1 to 8. Their common features and the dimensions of the features are specified in Tables 1 and 2 and shown in Figures 9 to 11. Essential features of coil-springs are shown in Figures 12 to 16. Table 3 specifies different classes of contact
26、 pressure. Tables 4 to 9 give the dimensions and forces of coil-spring-loaded oil control rings.The common features and dimensional tables presented in this part of ISO 6626 constitute a broad range of variables and, in selecting a particular ring type, the designer shall bear in mind the conditions
27、 under which it will be required to operate.It is also essential that the designer refer to the specifications and requirements of ISO 6621-3 and ISO 6621-4 before completing a selection.For the cast iron part, the recommended material is class 10 and shall be in accordance with ISO 6621-3. For spec
28、ial applications, material classes 20 to 50 may be used.Variation from these in face design and spring groove may be used, as recommended by individual manufacturers, in plain or chromed versions.INTERNATIONAL STANDARD ISO 6626-2:2013(E) ISO 2013 All rights reserved 1BS ISO 6626-2:2013ISO 6626-2:201
29、3(E)4 Piston ring types and designation4.1 DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP types4.1.1 General features and dimensionsSee Figure 1 and Tables 4, 5, 6, 7, 8 and 9.Figure 1 Types DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP4.2 Type DSF-C Coil-spring-loaded bevelled edge oil control r
30、ing, chromium-plated, and profile ground4.2.1 General features and dimensionsSee Figure 2 and Table 4.2 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 2 Type DSF-C4.2.2 Designation of a ty
31、pe DSF-C piston ring in accordance with this part of ISO 6626EXAMPLE A coil-spring-loaded bevelled edge oil control ring, chromium plated and profile ground (DSF-C), of nominal diameter d1= 80 mm (80), nominal ring width h1= 2,5 mm (2,5), made of grey cast iron, non-heat treated, material subclass 1
32、1 (MC11), having a selected closed gap of 0,20 mm min. (S020), a chromium layer thickness on the lands of 0,10 mm (CR2), reduced slot length (WK), a coil spring with reduced heat set (WF), and a variable pitch with coil diameter d7ground (CSE), with tangential force Ftin accordance with the medium n
33、ominal contact pressure class (PNM) and the ring marked with the manufacturers mark (MM) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 DSF-C - 80 2,5 - MC11/S020 CR2 WK WF CSE PNM MM4.3 Type DSF-CNP Coil-spring-loaded bevelled-edge oi
34、l control ring, chromium-plat-ed not profile ground4.3.1 General features and dimensionsSee Figure 3 and Tables 5. ISO 2013 All rights reserved 3BS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 3 Type DSF-CNP4.3.2 Desi
35、gnation of a type DSF-CNP piston ring in accordance with this part of ISO 6626EXAMPLE A coil-spring-loaded slotted oil control ring (DSF-CNP) of nominal diameter d1= 100 mm (100), nominal ring width h1= 2,0 mm (2,0), made of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spr
36、ing pitch (CSN) and tangential force Ftin accordance with the low nominal contact pressure class (PNL) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 DSF-CNP 100 2 - MC12/CSN PNL4.4 Type SSF Coil-spring-loaded slotted oil control ring4
37、.4.1 General features and dimensionsSee Figure 4 and Table 6.4 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 4 Type SSF4.4.2 Designation of a type SSF piston ring in accordance with this
38、part of ISO 6626EXAMPLE A coil-spring-loaded slotted oil control ring (SSF) of nominal diameter d1= 80 mm (80), nominal ring width h1= 2,5 mm (2,5), made of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spring pitch (CSN) and tangential force Ftin accordance with the low no
39、minal contact pressure class (PNL) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 SSF- 80 2,5 - MC12/CSN PNL4.5 Type GSF Coil-spring-loaded double bevelled oil control ring4.5.1 General features and dimensionsSee Figure 5 and Table 7.
40、Top-side marking is mandatory in accordance with ISO 6621-4. ISO 2013 All rights reserved 5BS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference plane2 top side identification markaIn accordance with ISO 6621-2, land offsetFigure 5 Type GSF4.5.2 Designation of a type GSF piston
41、 ring in accordance with this part of ISO 6626EXAMPLE A coil-spring-loaded double bevelled oil control ring (GSF) of nominal diameter d1= 75 mm (75), nominal ring width h1= 2,5 mm (2,5), made of grey cast iron, non-heat treated, material subclass 12 (MC12), with constant spring pitch (CSN) and tange
42、ntial force Ftin accordance with the low nominal contact pressure class (PNL) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 GSF- 75 2,5 - MC12/CSN PNL4.6 Type DSF Coil-spring-loaded bevelled edge oil control ring4.6.1 General features
43、 and dimensionsSee Figure 6 and Table 7.6 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 6 Type DSF4.6.2 Designation of a type DSF piston ring in accordance with this part of ISO 6626EXAMP
44、LE A coil-spring-loaded double bevelled oil control ring (DSF) of nominal diameter d1= 90 mm (90), nominal ring width h1= 2,5 mm (2,5), made of grey cast iron, non-heat treated, material subclass 12 (MC12), with constant spring pitch (CSN) and tangential force Ftin accordance with the reduced nomina
45、l contact pressure class (PNR) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 DSF- 90 2,5 - MC12/CSN PNR4.7 Type DSF-NG Coil-spring-loaded bevelled-edge oil control ring (face geometry similar to type DSF-C)4.7.1 General features and d
46、imensionsSee Figure 7 and Table 8. ISO 2013 All rights reserved 7BS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 7 Type DSF-NG4.7.2 Designation of a type DSF-NG piston ring in accordance with this part of ISO 6626EXAM
47、PLE A coil-spring-loaded slotted oil control ring (DSF-NG) of nominal diameter d1= 80 mm (80), nominal ring width h1= 2,0 mm (2,0), made of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spring pitch (CSN) and tangential force Ftin accordance with the reduced nominal contact
48、 pressure class (PNR) is designated as follows. Parameters in parentheses are used in the ISO ring designation:Piston ring ISO 6626-2 DSF-NG - 80 2,0 - MC12/CSN PNR4.8 Type SSF-L Coil-spring-loaded slotted oil control ring with 0,4 mm nominal land width4.8.1 General features and dimensionsSee Figure
49、 8 and Table 9.8 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E)Dimensions in millimetresKey1 reference planeaIn accordance with ISO 6621-2, land offsetFigure 8 Type SSF-L4.8.2 Designation of a type SSF-L piston ring in accordance with this part of ISO 6626EXAMPLE A coil-spring-loaded slotted oil control ring (SSF-L) of nominal diameter d1= 80 mm (80), nominal ring width h1= 2,5 mm (2,5), made of grey cast iron, non-he
