1、BRITISH STANDARD BS 5341-7.4: 1992 ISO 6625:1986 Piston rings up to200mm diameter for reciprocating internal combustion engines Part 7: Designs, dimensions and designations for single piece rings Section 7.4 Specification for oil control ringsBS5341-7.4:1992 This British Standard, having been prepar
2、ed under the directionof the Machinery andComponents Standards PolicyCommittee, was publishedunder the authorityofthe StandardsBoardand comesintoeffecton 1May1992 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference MCE/14 Draft for comment 84/72267 DC IS
3、BN 0 580 20743 9 Committees responsible for this BritishStandard The preparation of this British Standard 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 Engine
4、ers British Railways Board Ministry of Defence Society of Motor Manufacturers and Traders Limited Amendments issued since publication Amd. No. Date CommentsBS5341-7.4:1992 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of
5、 application 1 2 References 1 3 Ring types and designation examples 2 4 Common features 6 5 Force factors 8 6 Dimensions 9 Figure 1 Type S 2 Figure 2 Type G 3 Figure 3 Type D 4 Figure 4 Type DV 5 Figure 5 Arrangement of slots 6 Figure 6 Inside chamfered edges 7 Table 1 Cutter diameter 6 Table 2 Slot
6、 length 7 Table 3 KI dimensions 8 Table 4 Force correction factors for S-, G-, D- and DV-rings with KI feature 8 Table 5 Dimensions of S-oil control rings 9 Table 6 Dimensions for G-, D- and DV-oil control rings 13 Table 7 Dimensions for S-, G-, D- and DV-oil control rings with special ring width h
7、1= 4,75 mm (3/16 in) 17 Publication(s) referred to Inside back coverBS5341-7.4:1992 ii BSI 03-2000 National foreword This Section of BS5341has been prepared under the direction of the Machinery and Components Standards Policy Committee and is identical with ISO6625:1986 “Internal combustion engines
8、Piston rings oil control rings” published by the International Organization for Standardization (ISO). Full requirements for piston rings for internal combustion engines are given in the following Parts and Sections of BS5341which are identical with ISO standards as indicated: Part 6: Vocabulary, in
9、spection methods and generic specifications; Section 6.1: Vocabulary; (Identical with ISO 6621-1) Section 6.2: Inspection measuring principles; (Identical with ISO 6621-2) Section 6.3: Material specifications; (Identical with ISO 6621-3) Section 6.4: General specifications; (Identical with ISO 6621-
10、4) Section 6.5: Quality requirements. (Identical with ISO 6621-5) Part 7: Designs, dimensions and designations for single piece rings; Section 7.1: Rectangular compression rings; Subsection 7.1.1: Specification for rectangular rings; (IdenticalwithISO6622-1) Subsection 7.1.2: Specification for recta
11、ngular rings with narrow ring width 1) ; Section 7.2: Specification for scraper rings; (Identical with ISO 6623) Section 7.3: Keystone and half keystone compression rings; Subsection 7.3.1: Specification for keystone rings; (Identical withISO 6624-1) Subsection 7.3.2: Specification for half keystone
12、 rings 2) ; Section 7.4: Specification for oil control rings. (Identical with ISO 6625) Part 8: Designs, dimensions and designations for multi-piece oil control rings; Section 8.1: Specification for coil-spring-loaded oil control rings; (Identicalwith ISO 6626) Section 8.2: Specification for expande
13、r/segment oil control rings 3) . BS 5341-6 to BS 5341-8 supersede BS 5341-1:1976, BS 5341-2:1977, BS 5341-3:1976 and BS 5341-4:1976 which are withdrawn. 1) It is envisaged that this Subsection will be identical with ISO 6622-2 when the International Standard is published. The technical report ISO/TR
14、 6622-2 is published in the UK as a Draft for Development, DD 208. 2) It is envisaged that this Subsection will be identical with ISO 6624-2 when the International Standard is published. The technical report ISO/TR 6624-2 is published in the UK as a Draft for Development, DD 209. 3) It is envisaged
15、that this Section will be identical with ISO 6627 when the International Standard is published. ISO/TR 6627 will shortly be published in the UK as a Draft for Development.BS5341-7.4:1992 BSI 03-2000 iii Cross-reference (additional to those listed above) The Technical Committee has reviewed the provi
16、sions of ISO1101to which normative reference is made in the text and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct
17、 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages1to 20, an inside back cover and a back cover. This standard has been updated (see copyright
18、date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.iv blankBS5341-7.4:1992 BSI 03-2000 1 0 Introduction ISO 6625 is one of a series of International Standards dealing with piston rings for reciprocating internal combustion engines:
19、 ISO 6621, Internal combustion engines Pistonrings Part 1: Vocabulary; Part 2: Measuring principles; Part 3: Material specifications; Part 4: General specifications 4) ; Part 5: Quality requirements 4) . ISO 6622, Internal combustion engines Pistonrings Part 1: Rectangular rings; Part 2: Rectangular
20、 rings with narrow ring width 5) . ISO 6623, Internal combustion engines Pistonrings Scraper rings. ISO 6624, Internal combustion engines Pistonrings Part 1: Keystone rings; Part 2: Haft keystone rings 6) . ISO 6625, Internal combustion engines Pistonrings Oil control rings. ISO 6626, Internal combu
21、stion engines Coilspring loaded oil control rings 4) . The common features and dimensional tables presented in this International Standard constitute a broad range of variables, and the designer, in selecting a particular ring type, shall bear in mind the conditions under which it will be required t
22、o operate. It is also essential that the designer refers to the specifications and requirements of ISO 6621-3 and ISO6621-4, before completing his selection. 1 Scope and field of application This International Standard specifies the essential dimensional features of S-, G-, D- and DV-oil control pis
23、ton ring types. The normal range for the axial width of oil control rings (2,5 to8mm inclusive) is divided into0,5or1,0mm increments. In Table 7, dimensions in inch units are given for oil control rings with axial width4,75mm (equal to3/16in) for existing applications. The requirements of this Inter
24、national Standard apply to oil control rings for reciprocating internal combustion piston engines, up to and including200mm diameter. It may also be used for piston rings of compressors working under similar conditions. 2 References ISO 1101, Technical drawings Geometrical tolerancing Tolerancing of
25、 form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings. ISO 6621, Internal combustion engines Pistonrings Part 3: Material specifications; Part 4: General specifications 4) . 4) At present at the stage of draft. 5) At present at the stage of draft (will
26、be published as a Technical Report). 6) In preparation (will be published as a Technical Report).BS5341-7.4:1992 2 BSI 03-2000 3 Ring types and designation examples 3.1 Type S Slotted oil control ring 3.1.1 General features NOTESee Table 5 or Table 7 for dimensions and forces. 3.1.2 Designation exam
27、ple Designation of a slotted oil control ring of d 1 =90mm nominal diameter, h 1=4mm ring width, made of grey cast iron, non-heat-treated (material subclass 12), general features as shown in Figure 1, and inside chamfered edges: Piston ring ISO 6625 - S - 90 4 - MC12 KI Figure 1 Type SBS5341-7.4:199
28、2 BSI 03-2000 3 3.2 Type G Double-bevelled oil control ring 3.2.1 General features NOTESee Table 6 or Table 7 for dimensions and forces. 3.2.2 Designation example Designation of a double-bevelled oil control ring of d 1 = 90 mm nominal diameter, h 1= 4 mm ring width, made of grey cast iron, non-heat
29、-treated (material subclass 12), general features as shown in Figure 2, and phosphated all over: Piston ring ISO 6625 - G - 90 4 - MC12 PO Figure 2 Type GBS5341-7.4:1992 4 BSI 03-2000 3.3 Type D Bevelled-edge oil control ring 3.3.1 General features NOTESee Table 6 or Table 7 for dimensions and force
30、s. 3.3.2 Designation example Designation of a bevelled-edge oil control ring of d 1 =90 mm nominal diameter, h 1= 4 mm ring width, made of grey cast iron, non-heat-treated (material subclass 12), general features as shown in Figure 3: Piston ring ISO 6625 - D - 90 4 - MC12 Figure 3 Type DBS5341-7.4:
31、1992 BSI 03-2000 5 3.4 Type DV Bevelled-edge V-groove oil control ring (only for ring widths h 1W W 4 mm) 3.4.1 General features NOTESee Table 6 or Table 7 for dimensions and forces. 3.4.2 Designation example Designation of a bevelled-edge V-groove oil control ring of d 1= 90 mm nominal diameter, h
32、1= 4,5 mm ring width, made of grey cast iron, non-heat-treated (material subclass 12), general features as shown in Figure 4: Piston ring ISO 6625 - DV - 90 4,5 - MC12 Figure 4 Type DVBS5341-7.4:1992 6 BSI 03-2000 4 Common features 4.1 S-, G-, D- and DV-rings Arrangement of slots Table 1 Cutter diam
33、eter Figure 5 Arrangement of slots Dimensions in millimetres d 1 Cutter diameter d 5 max. 30 u d 150 55 50 u d 1170 60 170 u d 1u 200 75BS5341-7.4:1992 BSI 03-2000 7 Table 2 Slot length 4.2 S-, G-, D- and DV-rings Inside chamfered edges (KI) Dimensions in millimetres d 1 Slot length Permissible diff
34、erence between w 1and w 2 w 1 Tolerance 30 u d 136 5 2 36 u d 140 6 2 40 u d 150 8 2 50 u d 1 170 w 1= w 2 2 170 u d 1u 200 w 1= w 2 4 Figure 6 Inside chamfered edgesBS5341-7.4:1992 8 BSI 03-2000 Table 3 KI dimensions 5 Force factors The tangential and diametral forces, given in Table 5, Table 6 and
35、 Table 7, shall 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, the multiplier correction factors given in Table 4 and the force correction factors given in ISO 6621-4 shall be used. Table 4
36、 Force correction factors for S-, G-, D- and DV-rings with KI feature Dimensions in millimetres d 1 KI 30 u d 1 125 0,3 0,15 125 u d 1 175 0,4 0,15 175 u d 1u 200 0,6 0,2 d 1 mm Factor 30 u d 150 1 50 u d 1100 0,98 100 u d 1 150 0,98 150 u d 1u 200 0,97BS 5341-7.4:1992 BSI 03-2000 9 6 Dimensions Tab
37、le 5 Dimensions of S-oil control rings Dimensions in millimetres Nominal diameter d 1 Radial wall thickness “regular” Ring width Closed gap Radius Land width Groove depth Number of slots Slot width Tangential force Diametral force a 1 h 1 s 1 r 3 h 4 a 4 c 1 F t , N F d , N Column For h 1shown in co
38、lumn For h 1shown in column For h 1shown in column For h 1shown in column Tolerance 1 2 3 4 Tolerance Tolerance 1 2 3 4 1 2 3 4 1 2 3 4 Tolerance 1 2 3 4 Tolerance 30 31 32 33 34 1,25 1,3 1,35 1,4 1,4 0,15 Within a ring: 0,15 max. 2,5 3 3,5 4 0,010 0,030 For phosphated PO surface: 0,005 0,030 0,15 +
39、0,2 0 0,2 max. 0,5 0,1 0,6 0,1 0,7 0,1 0,7 0,1 0,4 0,1 6 0,7 0,1 0,7 0,1 0,8 0,1 1 0,1 7,5 8 8,6 9 8,6 9,2 9,9 10,3 11 10,3 10,8 11,4 12,3 12,9 12 11,5 12,3 13,1 13,8 13,1 35 36 37 38 39 1,45 1,5 1,55 1,6 1,65 9 9,5 9,9 10,5 11 11 11,6 12,3 12,9 13,5 12,9 13,5 14,2 15,1 15,7 13,8 14,6 15,5 16,1 17 4
40、0 41 42 43 44 1,65 1,7 1,75 1,8 1,85 0,5 0,1 9,9 10,5 11 11,4 12 12,3 12,7 13,3 14 14,6 14,2 14,8 15,7 16,3 17 15,3 15,9 16,8 17,6 18,3 45 46 47 48 49 1,9 1,9 1,95 2 2,05 12,3 11,6 12,3 12,7 13,1 15,1 14,4 14,8 15,5 16,1 17,4 16,8 17,4 18,1 18,9 18,9 18,1 18,9 19,6 20,4 30% F d 21,5 N 50 51 52 53 54
41、 2,1 2,15 2,15 2,2 2,25 0,3 max. 0,6 0,1 6,2 6,4 6,2 6,4 6,6 7,5 7,8 7,5 7,8 8,1 8,8 9,1 8,8 9,1 9,4 9,5 9,8 9,5 9,8 10,2 30% if F t 10 N 20% if F tW 10 N 13,3 13,8 13,3 13,8 14,2 16,1 16,8 16,1 16,8 17,4 18,9 19,6 18,9 19,6 20,2 20,4 21,1 20,4 21,1 21,9 20% if F dW 21,5N 55 56 57 58 59 2,3 2,35 2,4
42、 2,4 2,45 6,9 7,1 7,3 7,1 7,3 8,4 8,7 8,9 8,6 8,9 9,8 10,1 10,5 10,1 10,4 10,6 10,9 11,3 10,9 11,3 14,8 15,3 15,7 15,3 15,7 18,1 18,7 19,1 18,5 19,1 21,1 21,7 22,6 21,7 22,4 22,8 23,4 24,3 23,4 24,3 60 61 62 63 64 2,5 2,55 2,6 2,65 2,65 0,2 +0,2 0 0,8 0,1 8 7,1 7,3 7,5 7,7 7,5 8,6 8,9 9,2 9,4 9,1 10
43、,1 10,4 10,7 11 10,7 10,8 11,1 11,5 11,8 11,4 15,3 15,7 16,1 16,6 16,1 18,5 19,1 19,8 20,2 19,6 21,7 22,4 23 23,7 23 23,2 23,9 24,7 25,4 24,5 65 66 67 68 69 2,7 2,75 2,8 2,85 2,9 7,7 7,9 8,2 8,4 8,6 9,4 9,7 10 10,2 10,5 11 11,3 11,6 12 12,3 11 12,2 12,5 12,9 13,3 16,6 17 17,6 18,1 18,5 20,2 20,9 21,
44、5 21,9 22,6 23,7 24,3 24,9 25,8 26,4 25,4 26,2 26,9 27,7 28,6BS 5341-7.4:1992 10 BSI 03-2000 Table 5 Dimensions of S-oil control rings Dimensions in millimetres Nominal diameter d 1 Radial wall thickness “regular” Ring width Closed gap Radius Land width Groove depth Number of slots Slot width Tangen
45、tial force Diametral force a 1 h 1 s 1 r 3 h 4 a 4 c 1 F t , N F d , N Column For h 1shown in column For h 1shown in column For h 1shown in column For h 1shown in column Tolerance 1 2 3 4 Tolerance Tolerance 1 2 3 4 1 2 3 4 1 2 3 4 Tolerance 1 2 3 4 Tolerance 70 71 72 73 74 2,9 2,95 3 3,05 3,1 0,15
46、Within a ring: 0,15 max. 2,5 3 3,5 4 0,010 0,030 For phosphated PO surface: 0,005 0,030 0,2 +0,2 0 0,3 max. 0,5 0,1 0,6 0,1 0,7 0,1 0,7 0,1 0,8 0,1 8 0,7 0,1 0,7 0,1 0,8 0,1 1 0,1 8,4 8,6 8,8 9,1 9,3 10,2 10,5 10,8 11,1 11,4 11,9 12,3 12,6 12,9 13,3 12,9 13,2 13,6 14 14,3 30% if F t 10 N 20% if F tW
47、 10 N 18,1 18,5 18,9 19,6 20 21,9 22,6 23,2 23,9 24,5 25,6 26,4 27,1 27,7 28,6 27,7 28,4 29,2 30,1 30,7 30% ifF d21,5N 20% ifF dW 21,5N 75 76 77 78 79 3,15 3,15 3,2 3,25 3,3 0,25 +0,25 0 9,5 9,2 9,5 9,7 9,9 11,6 11,3 11,6 11,8 12,1 13,5 13,2 13,5 13,8 14,2 14,6 14,2 14,6 15 15,4 20,4 19,8 20,4 20,9
48、21,3 24,9 24,3 24,9 25,4 26 29 28,4 29 29,7 30,5 31,4 31,4 31,4 32,3 33,1 80 81 82 83 84 3,35 3,4 3,4 3,45 3,5 3 3,5 4 4,5 0,5 max. 0,6 0,1 0,7 0,1 0,7 0,1 0,8 0,1 1 0,1 0,7 0,1 0,8 0,1 1 0,1 1,2 0,1 11,9 12,2 11,9 12,2 12,5 13,9 14,3 13,9 14,2 14,6 14,9 15,3 14,9 15,3 15,7 16,8 17,2 16,8 17,2 17,6 25,6 26,2 25,6 26,2 26,9 29,9 30,7 29,9 30,5 31,4 32 32,9 32 32,9 33,8 36,1 37 36,1 37 37,8 85 86 87 88 89 3,55 3,6 3,65 3,65 3,7 12,8 13 13,3 13 13,3 14,9 15,2 15,6 15,2 15,5 16 16,4 16,8 16,4 16,7 18 18,4 18,8 18,4 18,8 27,5 28 28,6 28 28,6 32
