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1、BRITISH STANDARD BS 5341-7.1.1: 1992 ISO 6622-1: 1986 Piston rings up to 200 mm diameter for reciprocating internal combustion engines Part 7: Designs, dimensions and designations for single piece rings Section 7.1 Rectangular compression rings Subsection 7.1.1 Specification for rectangular rings Li
2、censed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 This British Standard, having been prepared under the direction of the Machinery and Components Standards Policy Committee, was published under the authority of the Standards B
3、oard and comes into effect on 1 May 1992 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference MCE/14 Draft for comment 84/72265 DC ISBN 0 580 20741 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted b
4、y 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 Motor Manufacturers and Traders Limited Amendments issued since
5、 publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-2000i Contents Page Committees responsibleInside front cover National forewordii 0Introduction1 1Scope and field of application1 2Ref
6、erences1 3Ring types and designation examples1 4Common features5 5Force factors11 6Dimensions12 Figure 1 Type R2 Figure 2 Type B3 Figure 3 Type M4 Figure 4 Uncoated type R rings5 Figure 5 Fully faced coated type R rings5 Figure 6 Semi-inlaid coated type R rings5 Figure 7 Inlaid coated type R rings5
7、Figure 8 Uncoated type B rings6 Figure 9 Fully faced coated type B rings6 Figure 10 Semi-inlaid coated type B rings6 Figure 11 Inlaid coated type B rings6 Figure 12 Uncoated type M rings7 Figure 13 Fully faced coated type M rings7 Figure 14 Semi-inlaid coated type M rings7 Figure 15 Inlaid coated ty
8、pe M rings7 Figure 16 Internal bevel top side (IF)8 Figure 17 Internal step top side (IW)8 Figure 18 Internal bevel bottom side (IFU)8 Figure 19 Internal step bottom side (IWU)8 Figure 20 Variable internal bevel9 Figure 21 Outside chamfered edges (KA)9 Figure 22 Inside chamfered edges (KI)9 Figure 2
9、3 Outside and inside chamfered edges (KA KI)10 Figure 24 Details of Figure 21, Figure 22 and Figure 2310 Figure 25 Layer thickness11 Table 1 Gauge width (h8) and barrel dimensions3 Table 2 Taper4 Table 3 a3 and h18 dimensions8 Table 4 KA and KI dimensions10 Table 5 Layer thickness11 Table 6 Force co
10、rrection factors for R-, B- and M-rings with features KA, KI, IF and IW11 Table 7 Force correction factors for coated R-, B- and M-rings (fully faced, semi-inlaid and inlaid type)11 Table 8 Dimensions of R-, B- and M-rectangular rings (radial wall thickness “regular”)12 Table 9 Dimensions of R-, B-
11、and M-rectangular rings (radial wall thickness “D/22”)15 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 ii BSI 02-2000 National foreword This Subsection of BS 5341 has been prep
12、ared under the direction of the Machinery and Components Standards Policy Committee and is identical with ISO 6622-1:1986 “Internal combustion engines Piston rings Part 1: Rectangular rings” published by the International Organization for Standardization (ISO). Full requirements for piston rings for
13、 internal combustion engines are given in the following Parts and Sections of BS 5341 which are identical with ISO standards as indicated: Part 6: Vocabulary, inspection methods and generic specifications; Section 6.1: Vocabulary; (Identical with ISO 6621-1) Section 6.2: Inspection measuring princip
14、les; (Identical with ISO 6621-2) Section 6.3: Material specifications; (Identical with ISO 6621-3) Section 6.4: General specifications; (Identical with ISO 6621-4) Section 6.5: Quality requirements. (Identical with ISO 6621-5) Part 7: Designs, dimensions and designations for single piece rings; Sect
15、ion 7.1: Rectangular compression rings; Subsection 7.1.1: Specification for rectangular rings; (Identical with ISO 6622-1) Subsection 7.1.2: Specification for rectangular rings with narrow ring width1); Section 7.2: Specification for scraper rings; (Identical with ISO 6623) Section 7.3: Keystone and
16、 half keystone compression rings; Subsection 7.3.1: Specification for keystone rings; (Identical with ISO 6624-1) Subsection 7.3.2: Specification for half keystone rings2); Section 7.4: Specification for oil control rings. (Identical with ISO 6625) Part 8: Designs, dimensions and designations for mu
17、lti-piece oil control rings; Section 8.1: Specification for coil-spring-loaded oil control rings; (Identical with ISO 6626) Section 8.2: Specification for expander/segment oil control rings3). 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 ar
18、e 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 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
19、 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 that this Section will be identical with ISO 6627 when the International Standard is published. ISO/TR 6627 will shortly be published in the
20、 UK as a Draft for Development. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-2000iii Cross-reference (additional to those listed above) The Technical Committee has reviewed the provisions of ISO 1101:1983 to whic
21、h 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 application. Complianc
22、e 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, pages 1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have ha
23、d amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Unco
24、ntrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-20001 0 Introduction ISO 6622-1 is one of a series of International Standards dealing with piston rings for reciprocating internal combustion engines: ISO 6621, Internal combustion engines Piston rings Part 1: Vocabulary; Part 2: Measuring principles;
25、 Part 3: Material specifications; Part 4: General specifications4); Part 5: Quality requirements4). ISO 6622, Internal combustion engines Piston rings Part 1: Rectangular rings; Part 2: Rectangular rings with narrow ring width5). ISO 6623, Internal combustion engines Piston rings Scraper rings. ISO
26、6624, Internal combustion engines Piston rings Part 1: Keystone rings; Part 2: Half keystone rings6). ISO 6625, Internal combustion engines Piston rings Oil control rings. ISO 6626, Internal combustion engines Coil spring loaded oil control rings4). The common features and dimensional tables present
27、ed in this part of ISO 6622 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 to operate. It is also essential that the designer refers to the specifications and requirements of ISO 6621-3 a
28、nd ISO 6621-4 before completing his selection. 1 Scope and field of application This part of ISO 6622 specifies the essential dimensional features of R-, B- and M-rectangular piston ring types. Dimensional Table 8 and Table 9 offer the choice of two radial wall thicknesses: radial wall thickness “re
29、gular” (Table 8); radial wall thickness “D/22” (Table 9). The requirements of this part of ISO 6622 apply to rectangular rings for reciprocating internal combustion piston engines, up to and including 200 mm diameter. It may also be used for piston rings of compressors working under similar conditio
30、ns. 2 References ISO 1101, Technical drawings Geometrical tolerancing Tolerancing of form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings. ISO 6621, Internal combustion engines Piston rings Part 3: Material specifications; Part 4: General specifications
31、4). 3 Ring types and designation examples 3.1 Type R Straight-faced rectangular ring 3.1.1 General features NOTESee Table 8 or Table 9 for dimensions and forces. 4) At present at the stage of draft. 5) At present at the stage of draft (will be published as a Technical Report). 6) In preparation (wil
32、l be published as a Technical Report). Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 2 BSI 02-2000 3.1.2 Designation example Designation of a straight-faced rectangular ring of d1= 90 mm nominal diameter, radial wall thi
33、ckness “regular”, h1= 2,5 mm ring width, made of grey cast iron, non-heat-treated (material subclass 12), general features as shown in Figure 1, and phosphated all over: Piston ring ISO 6622-1 R 90 2,5 MC12 PO 3.2 Type B Barrel-faced rectangular ring 3.2.1 General features NOTESee Table 8 or Table 9
34、 for dimensions and forces. Figure 1 Type R Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-20003 Table 1 Gauge width (h8) and barrel dimensions 3.2.2 Designation example Designation of a barrel-faced rectangular ri
35、ng of d1= 90 mm nominal diameter, radial wall thickness “regular”, h1= 2,5 mm ring width, made of spheroidal graphite cast iron (material subclass 51), general features as shown in Figure 2, and periphery chromium-coated fully faced design, 0,15 mm minimum thickness: Piston ring ISO 6622-1 B 90 2,5
36、MC51 CR3 3.3 Type M Taper-faced rectangular ring 3.3.1 General features NOTESee Table 8 or Table 9 for dimensions and forces. * See Table 1. Figure 2 Type B Dimensions in millimetres h1h8t2, t3 Maximum peak off centre 1,50,8 0,003|0,015 0,25 1,751,0 0,3 2,01,2 2,51,60,4 3,02,0 0,005|0,0200,5 3,52,4
37、4,02,8 0,005|0,0230,6 4,53,2 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 4 BSI 02-2000 Table 2 Taper 3.3.2 Designation example Designation of a taper-faced rectangular ring of d1= 90 mm nominal diameter, radial wall th
38、ickness “regular” h1= 2,5 mm ring width, made of grey cast iron, heat-treated (material subclass 23), general features as shown in Figure 3, with taper M1 = 10, and periphery molybdenum-coated inlaid design, 0,10 mm minimum thickness: Piston ring ISO 6622-1 M1 90 2,5 MC23 MO2F * See Table 2. Figure
39、3 Type M Taper Uncoated and coated rings (molybdenum or chrome with tapered periphery ground) with IF or IWa (top side) with IFU or IWUa (bottom side)b ToleranceToleranceTolerance M11010 M23030 M3606060 M4909090 M5120120120 a IF, IW, IFU and IWU are explained in Figure 16 to Figure 19. b For M-rings
40、 (negative twist type) M3, M4 and M5, the twist angle should not exceed 90 % of the minimum taper angle. For coated rings with tapered periphery not ground, the tolerance shall be increased by 10 (e.g. M3 = 60: for M-rings or for M-rings with IF or IW). +40 0 +60 0 +50 0 +60 0 +60 0 +70 0 Licensed C
41、opy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-20005 4 Common features 4.1 Type R Straight-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
42、.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 rings Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 6 BSI 02-2000 4
43、.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 Figure 11 Inlaid coated ty
44、pe B rings Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 BSI 02-20007 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
45、.3 Inlaid Figure 12 Uncoated type M rings Figure 13 Fully faced coated type M rings Figure 14 Semi-inlaid coated type M rings Figure 15 Inlaid coated type M rings Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5341-7.1.1:1992 8 BSI 02-20
46、00 4.4 R-, B- and M-rings (positive twist type) Internal bevel or internal step top side 4.5 M-rings (negative twist type), tapers M3 to M5 Internal bevel or internal step bottom side Table 3 a3 and h18 dimensions 4.6 R-, B- and M-rings (positive twist type) and M-rings (negative twist type) Variabl
47、e internal bevel When the standard twist of 0,01/0,05 for rings u 2 mm axial width and 0,01/0,04 mm for rings 2 mm axial width per 2 mm of radial ring thickness is specified, the dimension a3, the angle and the width of the bevel are at the discretion of the manufacturer. In such cases, the design s
48、hould correspond to the design shown in Figure 20, a) or Figure 20 b). Figure 16 Internal bevel top side (IF)Figure 17 Internal step top side (IW) * See Table 2.* See Table 2. Figure 18 Internal bevel bottom side (IFU)Figure 19 Internal step bottom side (IWU) Dimensions in millimetres d1 a3h18 ToleranceTolerance 30 u d1 800,8 a10,6 h1 80 u d1 1000,8 a10,6 h1 100 u d1 1500,8 a10,6 h1 150 u d1 u 2000,8 a10,6 h1 0 0,2 0 0,25 0 0,3 0 0,25 0 0,3 0 0,35 0 0,4 0 0,45 Licensed Copy: sheffieldun sheffieldun, na, Fri Dec 01 14:46:19 GMT+00:00 2006, Uncontrolled Copy,