1、BRITISH STANDARD BS ISO 6622-1:2003 Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron ICS 27.020 BS ISO 6622-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 December 2003 BSI 19 December 2003 ISBN
2、0 580 43123 1 National foreword This British Standard reproduces verbatim ISO 6622-1:2003 and implements it as the UK national standard. It supersedes BS 5341-7.1.1:1992 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MCE/14, RIC engines, to Subcommit
3、tee MCE/14/-/10, RIC engines Cylinders, pistons and rings, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this docu
4、ment may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract.
5、 Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for ch
6、ange, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 30, an inside back cover and a b
7、ack cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 6622-1:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 6622-1 Second edition 2003-12-01 Internal combustion engines P
8、iston rings Part 1: Rectangular rings made of cast iron Moteurs combustion interne Segments de piston Partie 1: Segments rectangulaires en fonte moule BSISO66221:2003IS-2266 O1:(3002E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file
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13、14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii ISO 3002 Allr ihgtsser edevrBSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Overview 1 4 Ring types and designation examples 2 4.1 Type R Straight
14、faced rectangular ring 2 4.2 Type B Barrel faced rectangular ring . 3 4.3 Type BA Asymmetrical barrel faced rectangular ring h 1W 1,5 mm. 4 4.4 Type M Taper faced rectangular ring . 5 5 Common features 6 5.1 Type R Straight faced rectangular ring 6 5.2 Type B Barrel faced rectangular ring . 8 5.3 Ty
15、pe BA Asymmetrical barrel faced rectangular ring h 1W 1,5 mm. 9 5.4 Type M Taper faced rectangular ring .10 5.5 Type R, B, BA and M rings (positive twist type) Internal bevel or internal step top side . 12 5.6 Type M rings (negative twist type), tapers M3 to M5 Internal bevel or internal step bottom
16、 side 13 5.7 Type R, B, BA and M rings (positive twist type), and Type M rings (negative twist type) Defined twist feature (IFV and IFVU) . 14 5.8 Type R, B and BA rings Outside chamfered edges (KA) 15 5.9 Type R, B, BA and M rings Inside chamfered edges (KI) . 15 5.10 Type R, B and BA rings Outside
17、 and inside chamfered edges (KA + KI). 15 5.11 Type R, B, BA and M rings (fully faced, semi-inlaid and inlaid) Plating/coating thickness 17 6 Force factors . 17 7 Dimensions 18 Bibliography . 30 BSISO66221:2003IS-2266 O1:(3002E) iv I SO 3002 All irhgts seredevrForeword ISO (the International Organiz
18、ation 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 which a technical committee has been established
19、 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 matters of electrotechnical standardization. I
20、nternational Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publ
21、ication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 such patent
22、rights. ISO 6622-1 was prepared by Technical Committee ISO/TC 22, Road vehicles. This second edition cancels and replaces the first edition (ISO 6622-1:1986), which has been technically revised. ISO 6622 consists of the following parts, under the general title Internal combustion engines Piston ring
23、s: Part 1: Rectangular rings made of cast iron Part 2: Rectangular rings made of steel BSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr vIntroduction ISO 6622 is one of a number of series of International Standards dealing with piston rings for reciprocating internal combustion engine
24、s. Others are ISO 66212, 3, 4, 5 , ISO 66236 , ISO 66247, 8, 9, 10 , ISO 662511 , ISO 662612, 13and ISO 662714 . The common features and dimensional 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 min
25、d 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 6621-4 before completing selection. BSISO66221:2003blank BSISO66221:2003INTENRATIONAL TSANDADR IS-2266 O1:(3002E)I SO 3002 All irhgts
26、 seredevr 1Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron 1 Scope This part of ISO 6622 specifies the essential dimensional features of rectangular rings made of cast iron, Types R, B, BA and M, having diameters up to and including 200 mm, used in reciprocating
27、internal combustion piston engines. It is also applicable to piston rings of compressors working under similar conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undat
28、ed 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 Overview The rectangular ring types are specified in Tables 1 to 3 and Figures 1 to 4. Their common features and the
29、dimensions of those features are specified in Tables 4 to 8 and Figures 5 to 31. Tables 9 and 10 give the force factors for the different ring types, while Tables 11 and 12 give the dimensions and forces of rectangular rings of radial wall thickness regular and D/22, respectively. BSISO66221:2003IS-
30、2266 O1:(3002E) 2 I SO 3002 All irhgts seredevr4 Ring types and designation examples 4.1 Type R Straight faced rectangular ring 4.1.1 General features See Table 11 or 12 for dimensions and forces. Key 1 reference plane at = 0,005 h 1 . Figure 1 Type R 4.1.2 Designation EXAMPLE Designation of a pisto
31、n ring complying with the requirements of ISO 6622-1, being a rectangular ring made of cast iron, with a straight faced peripheral surface (R), of nominal diameter d 1= 90 mm (90), of nominal ring width h 1= 2,5 mm (2,5), made of non heat treated grey cast iron, subclass 12 (MC12), phosphated on all
32、 sides (PO): Piston ring ISO 6622-1 R 90 2,5 - MC12/PO BSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr 34.2 Type B Barrel faced rectangular ring 4.2.1 General features See Table 11 or 12 for dimensions and forces. Key 1 reference plane aSee Table 1. Figure 2 Type B Table 1 Gauge widt
33、h (h 8 ) and barrel dimensions for symmetrical barrel faced compression rings Dimensions in millimetres h 1h 25 ah 26h 26tol. h 27t 2 ,t 3 bh 8 c1,2 0,30 0,60 0,20 0,90 0,003.0,012 0,60 1,5 0,35 0,75 0,25 1,15 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 0,
34、003.0,015 1,60 3,0 0,50 1,50 0,50 2,50 2,00 3,5 0,55 1,75 0,50 2,95 0,005.0,020 2,40 4,0 0,60 2,00 0,60 3,40 2,80 4,5 0,65 2,25 0,60 3,85 0,005.0,023 3,20 ah 25may be lowered for rings with reduced edge dimensions. bt 2and/or t 3can be changed as agreed between edge dimensions. c Gauge width (h 8 )
35、only informative; may be used only if agreed between manufacturer and client. BSISO66221:2003IS-2266 O1:(3002E) 4 I SO 3002 All irhgts seredevr4.2.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring made of cast iron, with a barr
36、el faced peripheral surface (B), of nominal diameter d 1= 90 mm (90), of nominal width h 1= 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron, subclass 51 (MC51), with a chromium plated coating on the peripheral surface, and of minimum thickness 0,15 mm (CR3): Piston ring
37、ISO 6622-1 - B 90 2,5 - MC51/CR3 4.3 Type BA Asymmetrical barrel faced rectangular ring h 1W 1,5 mm 4.3.1 General features See Table 11 or 12 for dimensions and forces. Key 1 reference plane 2 mark Figure 3 Type BA Table 2 Barrel dimensions Dimensions in millimetres h 1h 25 ah 26h 26tol. h 27t 2 bt
38、3 b1,5 0,35 0,50 0,15 1,15 00,005 0,0070,022 1,75 2,0 0,35 0,40 0,55 0,60 0,20 1,35 1,50 00,007 0,0080,025 0,0090,030 2,5 3,0 0,45 0,55 0,70 0,80 0,25 1,80 2,10 00,008 0,0110,035 0,0120,038 3,5 4,0 0,60 0,65 0,90 0,95 0,30 2,40 2,80 00,009 0,0120,040 0,013. 0,045 4,5 0,70 1,05 0,35 3,20 00,010 0,015
39、. 0,050 a h 25may be lowered for rings with reduced edge dimensions. b t 2and/or t 3may be varied as agreed between manufacturer and client. BSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr 54.3.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO
40、6622-1, being a rectangular ring made of cast iron, with an asymmetrical barrel faced peripheral surface (BA), of nominal diameter d 1= 90 mm (90), of nominal width h 1= 2,5 mm (2,5), made of heat-treated martensitic spheroidal graphite cast iron subclass 51 (MC51), and having a chromium plated coat
41、ing on the peripheral surface with a minimum thickness of 0,15 mm (CR3): Piston ring ISO 6622-1 BA 90 2,5 - MC51/CR3 4.4 Type M Taper faced rectangular ring 4.4.1 General features See Table 11 or 12 for dimensions and forces. Key 1 reference plane 2 mark Figure 4 Type M BSISO66221:2003IS-2266 O1:(30
42、02E) 6 I SO 3002 All irhgts seredevrTable 3 Taper Dimensions in minutes Uncoated rings with peripheral surface turned and chromium plated or spray coated rings with peripheral surface ground and chromium plated rings with surface not groundawith IF or IW (top side)bwith IFU or IWU (bottom side)b, cC
43、ode Taper Tolerance Taper Tolerance Taper TolerancedM1c10 40 0 +10 M2 30 30 M3 60 60 60 M4 90 90 90 M5 120 50 0 +120 60 0 +120 60 0 +aFor chromium plated rings with tapered peripheral surface not ground, the tolerance shall be increased by 10 (e.g. M3 = 60: 60 0 +for M rings or 70 0 +for M rings wit
44、h IF or IW and IFU or IWU). b IF and IW, and IFU and IWU, are explained in Figures 22 to 25. cM1 should not be used for rings of width 1,5 mm or for those with a partly cylindrical peripheral surface. dFor M rings (negative twist type) M3, M4 and M5, the twist angle should not exceed 90 % of the min
45、imum taper angle. 4.4.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-1, being a rectangular ring made of cast iron, with a 10 taper faced peripheral surface (M1), of diameter d 1= 90 mm (90), of nominal width h 1= 2,5 mm (2,5), made of heat treated gre
46、y cast iron, subclass 23 (MC23) and having an inlaid spray coating on the peripheral surface with a minimum thickness of 0,1 mm (SC2F): Piston ring ISO 6622-1 M1 90 2,5 - MC23/SC2F 5 Common features 5.1 Type R Straight faced rectangular ring 5.1.1 Uncoated rings Key 1 mark Figure 5 Uncoated Type R r
47、ings BSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr 75.1.2 Chromium plated or spray coated rings 5.1.2.1 Fully faced Key 1 mark Figure 6 Fully faced Type R rings 5.1.2.2 Semi-inlaid Key 1 mark Figure 7 Semi-inlaid Type R rings 5.1.2.3 Inlaid (inlaid chrome not recommended) Key 1 mar
48、k Figure 8 Inlaid Type R rings BSISO66221:2003IS-2266 O1:(3002E) 8 I SO 3002 All irhgts seredevr5.2 Type B Barrel faced rectangular ring 5.2.1 Uncoated rings Key 1 mark Figure 9 Uncoated Type B rings 5.2.2 Chromium plated or spray coated rings 5.2.2.1 Fully faced Key 1 mark Figure 10 Fully faced Type B rings 5.2.2.2 Semi-inlaid Key 1 mark Figure 11 Semi-inlaid Type B rings BSISO66221:2003IS-2266 O1:(3002E) I SO 3002 All irhgts seredevr 95.2.2.3 Inlaid (inlaid chrome not recommended) Key 1 mark Figure 12 Inlai
