1、DRAFT FOR DEVELOPMENT DD208:1992 ISO/TR 6622-2:1988 Piston rings up to200mm diameter for reciprocating internal combustion engines: Specification for rectangular rings with narrow ring widthDD208:1992 This Draft for Development, having been prepared under thedirection of the Machinery andComponents
2、Standards PolicyCommittee, was publishedunder the authority ofthe Standards Board andcomesinto effect on 1May1992 BSI02-2000 The following BSI reference relates to the work on this Draftfor Development: Committee reference MCE/14 ISBN 0 580 20745 5 Committees responsible for this Draftfor Developmen
3、t The preparation of this Draft for Development was entrusted by the Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/14, upon which the following bodies were represented: Association of Consulting Engineers British Railways Board Ministry of Defence Society of
4、Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date CommentsDD208:1992 BSI 02-2000 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope and field of application 1 2 References 1 3 Ring types and designation examples 1 4 Common f
5、eatures 4 5 Force factors 10 6 Dimensions 11 Figure 1 Type R 1 Figure 2 Type B 2 Figure 3 Type M 3 Figure 4 Uncoated type R rings 4 Figure 5 Fully faced coated type R rings 4 Figure 6 Semi-inlaid coated type R rings 4 Figure 7 Inlaid coated type R rings 4 Figure 8 Uncoated type B rings 5 Figure 9 Fu
6、lly faced coated type B rings 5 Figure 10 Semi-inlaid coated type B rings 5 Figure 11 Inlaid coated type B rings 5 Figure 12 Uncoated type M rings 6 Figure 13 Fully faced coated type M rings 6 Figure 14 Semi-inlaid coated type M rings 6 Figure 15 Inlaid coated type M rings 6 Figure 16 Internal bevel
7、 (IF) 7 Figure 17 Internal step (IW) 7 Figure 18 Outside chamfered edges (KA) 7 Figure 19 Inside chamfered edges (KI) 8 Figure 20 Outside and inside chamfered edges (KA+KI) 8 Figure 21 Details of Figure 18, Figure 19 and Figure 20 8 Figure 22 Outside and inside rounded edges 9 Figure 23 Details of F
8、igure 22 9 Figure 24 Layer thickness 9 Table 1 Gauge width (h 8 ) and barrel dimensions 2 Table 2 Taper 3 Table 3 h 18 , h 19and a 3dimensions 7 Table 4 KA and KI dimensions 8 Table 5 Layer thickness 9 Table 6 Force correction factors for R-, B- and M-rings withfeaturesKA,KI,IF, IW and taper 10 Tabl
9、e 7 Force correction factors for R-, B- and M-rings (fully faced, semi-inlaid and inlaid type) 10 Table 8 Dimensions of R-, B- and M- rectangular ringswithnarrowringwidthmade of cast iron 11 Table 9 Dimensions of R-, B- and M- rectangular ringswithnarrowringwidthmade of steel 13 Publication(s) refer
10、red to Inside back coverDD208:1992 ii BSI 02-2000 National foreword This Draft for Development has been prepared under the direction of the Machinery and Components Standards Policy Committee and is identical with ISO/TR6622-2:1988 “Internal combustion engines Piston rings Part2:Rectangular rings wi
11、th narrow ring widths” published by the International Organization for Standardization (ISO). It is envisaged that, when ISO6622-2 is published, this Draft for Development will be withdrawn and ISO6622-2 will be published as BS5341-7.1.2. Full requirements for piston rings for internal combustion en
12、gines are given in the following Parts and Sections of BS5341, which are identical with ISO standards as indicated: Part 6: Vocabulary, inspection methods and generic specifications; Section 6.1: Vocabulary; (Identical with ISO6621-1) Section 6.2: Inspection measuring principles; (Identical with ISO
13、6621-2) Section 6.3: Material specifications; (Identical with ISO6621-3) Section 6.4: General specifications; (Identical with ISO6621-4) Section 6.5: Quality requirements. (Identical with ISO6621-5) Part 7: Designs, dimensions and designations for single piece rings; Section 7.1: Rectangular compres
14、sion rings; Subsection 7.1.1: Specification for rectangular rings; (Identical with ISO6622-1) Subsection 7.1.2: Specification for rectangular rings with narrow ring width; 1) Section 7.2: Specification for scraper rings; (Identical with ISO6623) Section 7.3: Specification for keystone and half keyst
15、one compression rings; Subsection 7.3.1: Specification for keystone rings; (Identical with ISO6624-1) Subsection 7.3.2: Specification for half keystone rings 2) ; Section 7.4: Specification for oil control rings. (Identical with ISO6625) Part 8: Designs, dimensions and designations for multi-piece o
16、il control rings; Section 8.1: Specification for coil-spring-loaded oil control rings; (Identical with ISO6626) Section 8.2: Specification for expander/segment oil control rings 3) . BS5341-6 to BS5341-8 supersede BS5341-1:1976, BS5341-2:1977, BS5341-3:1976 and BS5341-4:1976 which are withdrawn. 1)
17、It is envisaged that this Subsection will be identical with ISO6622-2 when the International Standard is published. 2) It is envisaged that this Subsection will be identical with ISO6624-2 when the International Standard is published. The technical report ISO/TR6624 is published in the UK as a Draft
18、 for Development, DD209. 3) It is envisaged that this Section will be identical with ISO6627 when the International Standard is published. ISO/TR6627 will shortly be published in the UK as a Draft for Development.DD208:1992 BSI 02-2000 iii Cross-reference (additional to those listed above) The Techn
19、ical Committee has reviewed the provisions of ISO1101 to which normative reference is made in the text and has decided that they are acceptable for use in conjunction with this Draft for Development. This publication is not to be regarded as a BritishStandard It is being issued in the Draft for Deve
20、lopment series of publications and is of a provisional nature because certain requirements contained therein may need modification in the light of practical experience in its use. It should be applied on this provisional basis so that information and experience of its practical operation may be obta
21、ined. It is expected that ISO will review the Technical Report with which this Draft for Development is identical before the end of1992 and a request for the submission of comments from users of this Draft for Development will be made in an announcement in the appropriate issue of BSI News. Accordin
22、g to the replies received, the responsible BSI committee will judge whether the UK should support conversion of the ISO Technical Report into an ISO standard or what other action should be taken. Observations which it is felt should receive attention before the official call for comments will be wel
23、comed. These should be sent to the Secretary of BSI Technical Committee MCE/14 at BSI,2 Park Street, London W1A2BS. Summary of pages This document comprises a front cover, an inside front cover, pagesi to iv, pages1to14, an inside back cover and a back cover. This standard has been updated (see copy
24、right date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankDD208:1992 BSI 02-2000 1 1 Scope and field of application This Technical Report specifies the essential dimensional features of R-, B- and M-rectangular piston ring t
25、ypes with narrow ring width. Dimension Table 8 and Table 9 allow for the use of cast iron (Table 8) or steel (Table 9). Since the modulus of elasticity of steel rings is higher than that of cast iron rings, the fluctuation in the surface pressure will become greater if the free gap is set as the ref
26、erence for forces. Therefore forces are set using the surface pressure as the reference, in order to minimize the effect of the fluctuation. The requirements of this Technical Report apply to rectangular piston rings of reciprocating internal combustion piston engines, up to and including90mm diamet
27、er for cast iron rings and up to and including100mm diameter for steel. It may also be used for piston rings of compressors working under similar conditions. 2 References ISO1101, Technical drawings Geometrical tolerancing Tolerancing of form, orientation, location and run-out Generalities, definiti
28、ons, symbols, indications on drawings. ISO6621, Internal combustion engines Piston rings Part3: Material specifications Part4:Generalspecifications. 3 Ring types and designation examples 3.1 Type R Straight-faced rectangular ring 3.1.1 General features NOTESeeTable 8 or Table 9 for dimensions and fo
29、rces. 3.1.2 Designation example Designation of a straight-faced rectangular ring with narrow ring width of d 1 =60mm nominal diameter, h 1 =1,2mm ring width, made of spheroidal graphite cast iron heat-treated (material subclass51), general features as shown in Figure 1, and periphery chromium-coated
30、 fully faced design0,1mm minimum thickness: Piston ring ISO/TR 6622-2 R 60 1,2 MC 51/CR2 Figure 1 Type RDD208:1992 2 BSI 02-2000 3.2 Type B Barrel-faced rectangular ring 3.2.1 General features NOTESeeTable 8 or Table 9 for dimensions and forces. Table 1 Gauge width (h 8 ) and barrel dimensions 3.2.2
31、 Designation example Designation of a barrel-faced rectangular ring with narrow ring width of d 1 =60mm nominal diameter, h 1 =1,2mm ring width, made of steel (material subclass62), general features as shown in Figure 2, and periphery chromium-coated fully faced design0,1mm minimum thickness: Piston
32、 ring ISO/TR 6622-2 B 60 1,2 MC 62/CR2 *See Table 1. Figure 2 Type B Dimensions in millimetres h 1 h 8 t 2 , t 3 Maximum peak off centre 1,2 0,6 0,002 0,012 0,2 1,5 0,8 0,003 0,015 0,25DD208:1992 BSI 02-2000 3 3.3 Type M Taper-faced rectangular ring 3.3.1 General features NOTESeeTable 8 or Table 9 f
33、or dimensions and forces. Table 2 Taper 3.3.2 Designation example Designation of a taper-faced rectangular ring with narrow ring width of d 1 =60mm nominal diameter, h 1 =1,2mm ring width, made of spheroidal graphite cast iron, heat-treated (material subclass51) general features as shown in Figure 3
34、 with taper M3=60 and periphery chromium-coated fully faced design0,1mm minimum thickness: Piston ring ISO/TR 6622-2 M3 60 1,2 MC 51/CR2 *See Table 2. Figure 3 Type M Taper Uncoated and coated rings (molybdenum or chromium with tapered periphery ground) with IF or IW a (Top side) Tolerance b Toleran
35、ce b M2 30 30 M3 60 60 a IF and IW are explained in Figure 16 and Figure 17. b For coated rings with tapered periphery not ground, the tolerance shall be increased by10 (e.g.M3=60:for M-rings orfor M-rings with IFor IW). +50 0 +60 0 +60 0 +70 0DD208:1992 4 BSI 02-2000 4 Common features 4.1 Type R St
36、raight-faced rectangular ring 4.1.1 Uncoated rings 4.1.2 Coated rings (chromium or molybdenum) 4.1.2.1 Fully faced 4.1.2.2 Semi-inlaid 4.1.2.3 Inlaid Figure 4 Uncoated type R rings Figure 5 Fully faced coated type R rings Figure 6 Semi-inlaid coated type R rings Figure 7 Inlaid coated type R ringsDD
37、208:1992 BSI 02-2000 5 4.2 Type B Barrel-faced rectangular ring 4.2.1 Uncoated rings 4.2.2 Coated rings (chromium or molybdenum) 4.2.2.1 Fully faced 4.2.2.2 Semi-inlaid 4.2.2.3 Inlaid Figure 8 Uncoated type B rings Figure 9 Fully faced coated type B rings Figure 10 Semi-inlaid coated type B rings Fi
38、gure 11 Inlaid coated type B ringsDD208:1992 6 BSI 02-2000 4.3 Type M Taper-faced rectangular ring 4.3.1 Uncoated rings 4.3.2 Coated rings (chromium or molybdenum) 4.3.2.1 Fully faced 4.3.2.2 Semi-inlaid 4.3.2.3 Inlaid Figure 12 Uncoated type M rings Figure 13 Fully faced coated type M rings Figure
39、14 Semi-inlaid coated type M rings Figure 15 Inlaid coated type M ringsDD208:1992 BSI 02-2000 7 4.4 R-, B- and M-rings (positive twist type) Internal bevel (top side) or internal step (top side) Table 3 h 18 , h 19and a 3dimensions 4.5 Chamfered edges (cast iron rings) 4.5.1 R- and B-rings Outside c
40、hamfered edges (KA) Figure 16 Internal bevel (IF) Figure 17 Internal step (IW) Dimensions in millimetres d 1 h 18 , h 19 a 3 Tolerance Tolerance 30u d 1 60 0,6 h 1 0,85 a 1 60u d 1 u 100 0,6 h 1 0,9 a 1 Figure 18 Outside chamfered edges (KA) 0 0,25 0 0,2 0 0,25 0 0,3DD208:1992 8 BSI 02-2000 4.5.2 R-
41、, B- and M-rings Inside chamfered edges (KI) 4.5.3 R- and B-rings Outside and inside chamfered edges (KA+KI) Table 4 KA and KI dimensions Figure 19 Inside chamfered edges (KI) Figure 20 Outside and inside chamfered edges (KA+KI) Figure 21 Details of Figure 18, Figure 19 and Figure 20 Dimensions in m
42、illimetres KA KI 0,15 0,1 max.0,2DD208:1992 BSI 02-2000 9 4.6 R- and B- steel rings Outside and inside rounded edges 4.7 R-, B- and M-rings (fully faced, semi-inlaid and inlaid) Layer thickness Table 5 Layer thickness Figure 22 Outside and inside rounded edges Figure 23 Details of Figure 22 Figure 2
43、4 Layer thickness Dimensions in millimetres Chromium Molybdenum Thickness min. CRF 0,005 CR1 M01 0,05 CR2 M02 0,1 CR3 a M03 a 0,15 a CR3 and M03 apply to rings with nominal diameters of50mm or greater.DD208:1992 10 BSI 02-2000 5 Force factors The tangential and diametral forces given in Table 8 shal
44、l be corrected when additional features and/or materials other than grey cast iron with a modulus of elasticity of100GN/m 2are being used. For common features, multiplier correction factors given in Table 6 and Table 7 and the force correction factors given in ISO6621-4 shall be used. Also the tange
45、ntial and diametral force given in Table 9 shall be corrected when additional features are being used. Table 6 Force correction factors for R-, B- and M-rings with features KA, KI, IF, IW and taper Table 7 Force correction factors for coated R-, B- and M-rings (fully faced, semi-inlaid and inlaid ty
46、pe) Factor KA KI Taper M3 IF IW KA and KI KA and taper M3 KA and IF KA and IW d 1 60 d 1 W 60 d 1 60 d 1 W 60 0,98 0,98 0,98 0,87 0,77 0,82 0,96 0,96 0,85 0,75 0,8 d 1 mm Factor CRF CR1 CR2/M01 CR3 M02 M03 30u d 1 50 1 0,81 0,7 0,64 50u d 1 100 1 0,9 0,85 0,81 0,81 0,75DD208:1992 BSI 02-2000 11 6 Di
47、mensions Table 8 Dimensions of R-, B- and M- rectangular rings withnarrowringwidthmadeofcastiron Dimensions in millimetres Nominal diameter Radial wall thickness Ring width Closed gap Tangential force Diametral force d 1 a 1 h 1 s 1 F t , N F d , N Tolerance Tolerance Tolerance Tolerance Tolerance 3
48、0 31 32 33 34 1,25 1,3 1,35 1,4 1,4 0,15 Within a ring: 0,15max. 1,2 0,01 0,025 For phosphated PO surface: 0,005 0,03 0,15 6 6,2 6,7 6,9 6,5 30% 35 36 37 38 39 1,45 1,5 1,55 1,6 1,65 6,9 7,1 7,5 7,7 8,2 40 41 42 43 44 1,65 1,7 1,75 1,8 1,85 7,7 8,2 8,4 8,8 9 45 46 47 48 49 1,9 1,9 1,95 2 2,05 9,2 9
49、9,2 9,7 9,9 50 51 52 53 54 2,1 2,15 2,15 2,2 2,25 4,8 4,9 4,7 4,9 5 30% 10,3 10,5 10,1 10,5 10,8 55 56 57 58 59 2,3 2,35 2,4 2,4 2,45 5,2 5,4 5,5 5,3 5,5 11,2 11,6 11,8 11,4 11,8 60 61 62 63 64 2,5 2,55 2,6 2,65 2,65 0,01 0,03 For phosphated PO surface: 0,005 0,03 0,2 5,6 5,7 5,9 6,1 5,9 12 12,3 12,7 13,1 12,7 65
