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1、 Reference number ISO 6622-2:2003(E) ISO 2003 INTERNATIONAL STANDARD ISO 6622-2 First edition 2003-10-01 Internal combustion engines Piston rings Part 2: Rectangular rings made of steel Moteurs combustion interne Segments de piston Partie 2: Segments rectangulaires en acier ISO 6622-2:2003(E) PDF di
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6、f 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 Switzerland ii ISO 2003 All rights reserved ISO 6622-2:2003(E) ISO 2003 All rights reserved iii Contents Page Forewordiv Introduct
7、ion v 1 Scope1 2 Normative references .1 3 Overview 1 4 Ring types and designation examples1 4.1 Type R Straight faced rectangular ring1 4.2 Type B Barrel faced rectangular ring.2 4.3 Type BA Asymmetrical barrel faced rectangular ring h1 W 1,5 mm4 4.4 Type M Taper faced rectangular ring .5 5 Common
8、features6 5.1 Type R Straight faced rectangular ring6 5.2 Type B Barrel faced rectangular ring.7 5.3 Type BA Asymmetrical barrel faced rectangular ring h1 W 1,5 mm8 5.4 Type M Taper faced rectangular ring .9 5.5 Type R, B, BA and M rings (positive twist type) Internal bevel top side 11 5.6 Type M ri
9、ngs (negative twist type), taper M3 to M5 Internal bevel bottom side, h1 W 1,5 mm11 5.7 Type R, B, BA and M rings Outside and inside rounded edges12 5.8 Type R, B, BA and M rings (fully faced and inlaid) Plating/coating thickness 13 5.9 Type R, B, BA and M rings Nitrided case depth13 6 Force factors
10、 .14 7 Dimensions14 Bibliography .21 ISO 6622-2:2003(E) iv ISO 2003 All rights reserved 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
11、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 part in the work. ISO coll
12、aborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International 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 St
13、andards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication 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
14、of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6622-2 was prepared by Technical Committee ISO/TC 22, Road vehicles. This first edition of ISO 6622-2 cancels and replaces ISO/TR 6622-2:1988, which has been tec
15、hnically 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: Rectangular rings made of steel ISO 6622-2:2003(E) ISO 2003 All rights reserved v Introduction ISO 6622 is one of a number
16、 of series of International Standards dealing with piston rings for reciprocating internal combustion engines. Others are ISO 66212, 3, 4, 5, ISO 66236, ISO 66247, 8, 9, 10, ISO 6625, ISO 662612, 13 and ISO 662714 (see Bibliography for details). The common features and dimensional tables presented i
17、n 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 ISO 6621-34 and ISO
18、 6621-4 before completing his selection. -,-,- INTERNATIONAL STANDARD ISO 6622-2:2003(E) ISO 2003 All rights reserved 1 Internal 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 rings mad
19、e of steel, types R, B, BA and M, having diameters of from 30 mm up to and including 160 mm, used in reciprocating 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
20、indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6621-4, Internal combustion engines Piston rings Part 4: General specifications? ? ?
21、 ? 3 Overview The rectangular ring types are specified in Tables 1 to 3 and Figures 1 to 4. Their common features and the dimensions of those features are specified in Tables 4 to 9 and Figures 5 to 22. Tables 10 and 11 give the force factors for the different ring types, while Table 12 gives the di
22、mensions and forces of the rectangular rings. 4 Ring types and designation examples 4.1 Type R Straight faced rectangular ring 4.1.1 General features See Table 12 for dimensions and forces. -,-,- ISO 6622-2:2003(E) 2 ISO 2003 All rights reserved Key 1 reference plane a t = 0,005 h1. Figure 1 Type R
23、4.1.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of 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 (M
24、C62), and with a chromium plated peripheral surface of a minimum thickness 0,1 mm (CR2): Piston ring ISO 6622-2 R - 60 1,2 - MC62/CR2 4.2 Type B Barrel faced rectangular ring 4.2.1 General features See Table 12 for dimensions and forces. ISO 6622-2:2003(E) ISO 2003 All rights reserved 3 Key 1 refere
25、nce plane a See Table 1. Figure 2 Type B Table 1 Gauge width (h8) and barrel dimensions for symmetrical barrel faced compression rings Dimensions in millimetres h1 h25 h26 h26 tol. h27 t2, t3 h8a 1,0 0,25 0,50 0,15 0,75 0,50 1,2 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
26、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 0,003.0,015 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 a Gauge width (h8) only informative; may be used only if agreed between manufacturer and client. 4.2.2 Designation EXAMPLE Designation
27、of a piston ring complying with the requirements of ISO 6622-2 being a steel, rectangular ring with 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), subclass 66 (MC66), nitrided on the peripheral s
28、urface 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.: Piston ring ISO 6622-2 B - 60 1,5 - MC66/NT030 ISO 6622-2:2003(E) 4 ISO 2003 All rights reserved 4.3 Type BA Asymmetrical barrel faced rectangular ring h1
29、W W W W 1,5 mm 4.3.1 General feature See Table 12 for dimensions and forces. Key 1 reference plane 2 mark Figure 3 Type BA Table 2 Barrel dimensions Dimensions in millimetres h1 h25a h26 h26 tol. h27 t2b t3b 1,5 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
30、 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 0,60 0,90 0,30 2,40 00,009 0,0120,040 a h25 may be lowered for rings with reduced edge dimensions. b t2 and/or t3 may be varied as agreed between manufacturer and client. ISO 6622-2:2003(E) ISO 2003 Al
31、l rights reserved 5 4.3.2 Designation EXAMPLE Designation of a piston ring complying with the requirements of ISO 6622-2 being a steel, rectangular ring with an asymmetrical barrel faced peripheral surface (BA), of nominal diameter d1 = 80 mm (80) and of nominal ring width h1 = 1,5 mm (1,5), made of
32、 martensitic steel (17 % Cr), subclass 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.: Piston ring ISO 6622-2 BA - 80 1,5 - MC66/NT050 4.4 Type M Taper faced rectang
33、ular ring NOTE Taper M1 excluded. 4.4.1 General features See Table 12 for dimensions and forces. Key 1 reference plane 2 mark Figure 4 Type M ISO 6622-2:2003(E) 6 ISO 2003 All rights reserved Table 3 Taper Dimensions in minutes Nitrided rings and chromium plated or spray coated rings with peripheral
34、 surface groundc with IFa (top side) with IFUa d (bottom side) Code Taper Tolerance Taper Tolerance Taper Toleranceb M2 30 30 M3 60 60 60 M4 90 90 90 M5 120 50 0 + 120 60 0 + 120 60 0 + a IF and IFU are explained in Figures 18 and 19. b For M rings (negative twist type) M3, M4 and M5, the twist angl
35、e should not exceed 90 % of the minimum taper angle. c For 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 with IF or IFU). d IFU not recommended for rings h1 u 1,2 mm 4.4.2 Designation E
36、XAMPLE Designation of a piston ring complying with the requirements of ISO 6622-2, being a steel, rectangular ring with 60 taper faced peripheral surface (M3), of nominal diameter d1 = 60 mm (60) and of nominal ring width h1 = 1,5 mm (1,5), made of alloyed steel (CrSi), subclass 62 (MC62), with a ch
37、romium plated peripheral surface of a minimum thickness of 0,1 mm (CR2): 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 rings Key 1 mark Figure 5 Nitrided type R rings ISO 6622-2:2003(E) ISO 2003 All rights reserved 7 5.1.2
38、 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 Inlaid h1 W 1,2 mm (not recommended for chromium plated rings) Key 1 mark Figure 7 Inlaid type R rings 5.2 Type B Barrel faced rectangular ring 5.2.1 Nitrided rings Key 1 mark Figure 8 Nit
39、rided type B rings -,-,- ISO 6622-2:2003(E) 8 ISO 2003 All rights reserved 5.2.2 Chromium plated or spray coated rings 5.2.2.1 Fully faced Key 1 mark Figure 9 Fully faced type B rings 5.2.2.2 Inlaid h1 W 1,2 mm (not recommended for chromium plated rings) Key 1 mark Figure 10 Inlaid type B rings 5.3
40、Type BA Asymmetrical barrel faced rectangular ring h1 W 1,5 mm 5.3.1 Nitrided rings Key 1 mark Figure 11 Nitrided type BA rings ISO 6622-2:2003(E) ISO 2003 All rights reserved 9 5.3.2 Chromium plated or spray coated rings 5.3.2.1 Fully faced Key 1 mark Figure 12 Fully faced type BA rings 5.3.2.2 Inl
41、aid h1 W 1,2 mm (not recommended for chromium plated rings) Key 1 mark Figure 13 Inlaid type BA rings 5.4 Type M Taper faced rectangular ring 5.4.1 Fully tapered 5.4.1.1 Nitrided rings Key 1 mark Figure 14 Nitrided type M rings -,-,- ISO 6622-2:2003(E) 10 ISO 2003 All rights reserved 5.4.1.2 Chromiu
42、m plated or spray coated rings 5.4.1.2.1 Fully faced Key 1 mark Figure 15 Fully faced type M rings 5.4.1.2.2 Inlaid h1 W 1,2 mm (not recommended for chromium plated rings) Key 1 mark Figure 16 Inlaid type M rings 5.4.2 Taper faced rectangular ring with partly cylindrical machined (LM) or lapped (LP)
43、 peripheral surface Key 1 mark Figure 17 Partly cylindrical or lapped type M rings ISO 6622-2:2003(E) ISO 2003 All rights reserved 11 Table 4 Axial dimensions of the cylindrical part of peripheral surface h24 Dimensions in millimetres h1 h24a max. h24 max. each side of gap up to 30 1,0 0,4 0,7 1,2 0
44、,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 a Partly cylindrical peripheral surface shall be visible. 5.5 Type R, B, BA and M rings (positive twist type) Internal bevel top side Figure 18 Internal bevel (IF) 5.6 Type M rings (negative twist type), taper M3 to M5 I
45、nternal bevel bottom side, h1 W 1,5 mm NOTE See Table 3. Figure 19 Internal bevel bottom side (IFU) ISO 6622-2:2003(E) 12 ISO 2003 All rights reserved Table 5 h19 dimensions for rings h1 1,5 mm Dimensions in millimetres h19 d1 Tolerance 30 u d1 u 100 0,6 h1 0 0,25 Table 6 a3 dimensions for rings h1
46、W W W W 1,5 mm Dimensions in millimetres a3 d1 Tolerance 30 u d1 80 0,8 a1 0 0,2 80 u d1 u 160 0,8 a1 0 0,3 5.7 Type R, B, BA and M rings Outside and inside rounded edges Figure 20 Outside and inside rounded edges Table 7 hx and hy dimensions Dimensions in millimetres h1 hx max. hy max. 1,0 u h1 1,5
47、 0,25 0,30 1,5 u h1 2,5 0,30 0,35 h1 W 2,5 0,30 0,40 -,-,- ISO 6622-2:2003(E) ISO 2003 All rights reserved 13 5.8 Type R, B, BA and M rings (fully faced and inlaid) Plating/coating thickness Figure 21 Plating/coating thickness Table 8 Plating/coating thickness Dimensions in millimetres Chromium plat
48、ing code Spray coating code Thickness min. CRF 0,005 CR1 SC1 0,05 CR2 SC2 0,1 CR3a SC3a 0,15 CR4a SC4a 0,2 a Not recommended for rings h1 u 1,2. 5.9 Type R, B, BA and M rings Nitrided case depth Figure 22 Nitrided case depth Table 9 Nitrided case depth Dimensions in millimetres Nitrided case depth min. Code Peripheral surface Side faces NT