1、BSI Standards Publication BS ISO 6626-2:2013 Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast ironBS ISO 6626-2:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 6626-2:2013. The UK particip
2、ation 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 a con
3、tract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 69380 9 ICS 43.060.10 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under t
4、he authority of the Standards Policy and Strategy Committee on 31 August 2013. Amendments issued since publication Date Text affectedBS ISO 6626-2:2013 ISO 2013 Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron Moteurs combustion
5、interne Segments de piston Partie 2: Segments racleurs rgulateurs dhuile troits, en fonte, mis en charge par ressort hlicodal INTERNATIONAL STANDARD ISO 6626-2 Second edition 2013-08-01 Reference number ISO 6626-2:2013(E)BS ISO 6626-2:2013ISO 6626-2:2013(E)ii ISO 2013 All rights reserved COPYRIGHT P
6、ROTECTED DOCUMENT ISO 2013 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 intranet, without prior written permission.
7、Permission can be requested from either ISO at the address below or ISOs member 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 6626-2:2013
8、ISO 6626-2:2013(E) ISO 2013 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references 1 3 Overview . 1 4 Piston ring types and designation 2 4.1 DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP types 2 4.2 Type DSF-C Coil-spring-loaded bevelled edge oil contr
9、ol ring, chromium-plated, and profile ground 2 4.3 Type DSF-CNP Coil-spring-loaded bevelled-edge oil control ring, chromium-plated not profile ground 3 4.4 Type SSF Coil-spring-loaded slotted oil control ring 4 4.5 Type GSF Coil-spring-loaded double bevelled oil control ring . 5 4.6 Type DSF Coil-sp
10、ring-loaded bevelled edge oil control ring 6 4.7 Type DSF-NG Coil-spring-loaded bevelled-edge oil control ring (face geometry similar to type DSF-C) 7 4.8 Type SSF-L Coil-spring-loaded slotted oil control ring with 0,4 mm nominal land width . 8 5 Common features . 9 5.1 Oil drainage by slots or hole
11、s . 9 5.2 Plating thickness DSF-C and DSF-CNP (coil-spring-loaded bevelled edge oil control ring, chromium plated) .11 5.3 Peripheral edges at gap of chromium plated oil control rings12 6 Coil springs 12 6.1 Types of coil spring 12 6.2 Coil spring excursion (extended gap) .14 6.3 Position of coil sp
12、ring gap and fixing 14 6.4 Material 14 7 Tangential force and nominal contact pressure .14 7.1 Tangential force .14 7.2 Force factors .14 7.3 Tangential force, F t. 15 7.4 Classes of nominal contact pressure, p o15 8 Dimensions and tangential forces .17 Bibliography .36BS ISO 6626-2:2013ISO 6626-2:2
13、013(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 committees. Each member body interested in a subject for wh
14、ich 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 Electrotechnical Commission (IEC) on all
15、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 ISO documents should be noted. Thi
16、s 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all s
17、uch 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/patents Any trade name used in this document is information given for the convenience of users and does no
18、t 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 6626-2:2003), which has been technically revised. ISO 6626 consists of the following parts, under the general title Internal combustio
19、n engines Piston rings: Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron Part 3: Coil-spring-loaded oil control rings made of steel ISO 6626:1989 (Internal combustion engines Piston rings Coil-spring-loaded oil control rings) is to be withdrawn and replaced with a part
20、1 (i.e. a revision) at a later date.iv ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E) Introduction ISO 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 66
21、22 (all parts), 2ISO 6623, 3ISO 6624 (all parts), 4ISO 6625 5and ISO 6627. 6 ISO 2013 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 iron 1 Scope This part of ISO 6626 specifi
22、es the essential dimensional features of coil-spring-loaded oil control rings made of cast 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 othe
23、r applications. 2 Normative references The following documents, in whole or in part, are normatively 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 (incl
24、uding any amendments) applies. ISO 6621-2, Internal combustion engines Piston rings Part 2: Inspection measuring principles ISO 6621-3, Internal combustion engines Piston rings Part 3: Material specifications ISO 6621-4, Internal combustion engines Piston rings Part 4: General specifications ISO 662
25、1-5, Internal combustion engines Piston rings Part 5: Quality requirements 3 Overview The coil-spring-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 featur
26、es of coil-springs are shown in Figures 12 to 16. Table 3 specifies different classes of contact 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 v
27、ariables and, in selecting a particular ring type, the designer shall 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 6621-3 and ISO 6621-4 before completing a selection. For the cast i
28、ron part, the recommended material is class 10 and shall be in accordance with ISO 6621-3. For special 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. INT
29、ERNATIONAL ST ANDARD ISO 6626-2:2013(E) ISO 2013 All rights reserved 1BS ISO 6626-2:2013ISO 6626-2:2013(E) 4 Piston ring types and designation 4.1 DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP types 4.1.1 General features and dimensions See Figure 1 and Tables 4, 5, 6, 7, 8 and 9. Figure 1 Types D
30、SF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP 4.2 Type DSF-C Coil-spring-loaded bevelled edge oil control ring, chromium-plated, and profile ground 4.2.1 General features and dimensions See Figure 2 and Table 4.2 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E) Dimensions in millime
31、tres Key 1 reference plane a In accordance with ISO 6621-2, land offset Figure 2 Type DSF-C 4.2.2 Designation of a type DSF-C piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded bevelled edge oil control ring, chromium plated and profile ground (DSF-C), of nominal diame
32、ter d 1= 80 mm (80), nominal ring width h 1= 2,5 mm (2,5), made of grey cast iron, non-heat treated, material subclass 11 (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 s
33、et (WF), and a variable pitch with coil diameter d 7ground (CSE), with tangential force F tin accordance with the medium nominal 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:
34、Piston ring ISO 6626-2 DSF-C - 80 2,5 - MC11/S020 CR2 WK WF CSE PNM MM 4.3 Type DSF-CNP Coil-spring-loaded bevelled-edge oil control ring, chromium-plat- ed not profile ground 4.3.1 General features and dimensions See Figure 3 and Tables 5. ISO 2013 All rights reserved 3BS ISO 6626-2:2013ISO 6626-2:
35、2013(E) Dimensions in millimetres Key 1 reference plane a In accordance with ISO 6621-2, land offset Figure 3 Type DSF-CNP 4.3.2 Designation of a type DSF-CNP piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded slotted oil control ring (DSF-CNP) of nominal diameter d 1=
36、 100 mm (100), nominal ring width h 1= 2,0 mm (2,0), made of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spring pitch (CSN) and tangential force F tin accordance with the low nominal contact pressure class (PNL) is designated as follows. Parameters in parentheses are used
37、 in the ISO ring designation:Piston ring ISO 6626-2 DSF-CNP 100 2 - MC12/CSN PNL 4.4 Type SSF Coil-spring-loaded slotted oil control ring 4.4.1 General features and dimensions See Figure 4 and Table 6.4 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E) Dimensions in millimetres Key 1
38、reference plane a In accordance with ISO 6621-2, land offset Figure 4 Type SSF 4.4.2 Designation of a type SSF piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded slotted oil control ring (SSF) of nominal diameter d 1= 80 mm (80), nominal ring width h 1= 2,5 mm (2,5), m
39、ade of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spring pitch (CSN) and tangential force F tin 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 SS
40、F- 80 2,5 - MC12/CSN PNL 4.5 Type GSF Coil-spring-loaded double bevelled oil control ring 4.5.1 General features and dimensions See Figure 5 and Table 7. 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 mill
41、imetres Key 1 reference plane 2 top side identification mark a In accordance with ISO 6621-2, land offset Figure 5 Type GSF 4.5.2 Designation of a type GSF piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded double bevelled oil control ring (GSF) of nominal diameter d 1
42、= 75 mm (75), nominal ring width h 1= 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 F tin accordance with the low nominal contact pressure class (PNL) is designated as follows. Parameters in parentheses are
43、used in the ISO ring designation:Piston ring ISO 6626-2 GSF- 75 2,5 - MC12/CSN PNL 4.6 Type DSF Coil-spring-loaded bevelled edge oil control ring 4.6.1 General features and dimensions See Figure 6 and Table 7.6 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E) Dimensions in millimetre
44、s Key 1 reference plane a In accordance with ISO 6621-2, land offset Figure 6 Type DSF 4.6.2 Designation of a type DSF piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded double bevelled oil control ring (DSF) of nominal diameter d 1= 90 mm (90), nominal ring width h 1=
45、 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 F tin accordance with the reduced nominal contact pressure class (PNR) is designated as follows. Parameters in parentheses are used in the ISO ring designation:
46、Piston ring ISO 6626-2 DSF- 90 2,5 - MC12/CSN PNR 4.7 Type DSF-NG Coil-spring-loaded bevelled-edge oil control ring (face geometry similar to type DSF-C) 4.7.1 General features and dimensions See Figure 7 and Table 8. ISO 2013 All rights reserved 7BS ISO 6626-2:2013ISO 6626-2:2013(E) Dimensions in m
47、illimetres Key 1 reference plane a In accordance with ISO 6621-2, land offset Figure 7 Type DSF-NG 4.7.2 Designation of a type DSF-NG piston ring in accordance with this part of ISO 6626 EXAMPLE A coil-spring-loaded slotted oil control ring (DSF-NG) of nominal diameter d 1= 80 mm (80), nominal ring
48、width h 1= 2,0 mm (2,0), made of grey cast iron, non-heat treated, material subclass 12 (MC12), constant spring pitch (CSN) and tangential force F tin accordance with the reduced nominal contact pressure class (PNR) is designated as follows. Parameters in parentheses are used in the ISO ring designa
49、tion:Piston ring ISO 6626-2 DSF-NG - 80 2,0 - MC12/CSN PNR 4.8 Type SSF-L Coil-spring-loaded slotted oil control ring with 0,4 mm nominal land width 4.8.1 General features and dimensions See Figure 8 and Table 9.8 ISO 2013 All rights reservedBS ISO 6626-2:2013ISO 6626-2:2013(E) Dimensions in millimetres Key 1 reference plane a In accordance with ISO 6621-2, land offset Figure 8 Type SSF-L 4.8.2 Designation of a type SSF-L pisto
