1、BRITISH STANDARD BS 5341-5: 1976 Specification for Piston rings up to 200 mm diameter for reciprocating internal combustion engines Part 5: Ring grooves UDC 621.431.3 242.3:62 45BS5341-5:1976 This British Standard, having been prepared under the directionof the Mechanical Engineering Standards Commi
2、ttee, was published underthe authority of the Executive Board on 29October1976 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference MEE/123/1 Draft for comment 76/71462 DC and draft for approval 76/74868 ISBN 0 580 09218 6 Cooperating organizations The Me
3、chanical Engineering Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and professional and industrial organizations: Associated Offices Technical Committee Association of Consulting Engineers Associ
4、ation of Hydraulic Equipment Manufacturers Limited Association of Mining Electrical and Mechanical Engineers British Compressed Air Society British Electrical and Allied Manufacturers Association British Gas Corporation British Gear Manufacturers Association British Internal Combustion Engine Manufa
5、cturers Association* British Mechanical Engineering Confederation British Pump Manufacturers Association British Steel Corporation British Steel Industry Crown Agents for Oversea Governments and Administrations Department of Industry Department of Industry National Engineering Laboratory Department
6、of the Environment Department of Trade Electricity Supply Industry in England and Wales Engineering Equipment Users Association Federation of Manufacturers of Construction Equipment and Cranes Health and Safety Executive HM Factory Inspectorate Institution of Gas Engineers Institution of Heating and
7、 Ventilating Engineers Institution of Mechanical Engineers* Institution of Plant Engineers Institution of Production Engineers London Transport Executive Machine Tool Trades Association Ministry of Defence* National Coal Board Process Plant Association Railway Industry Association of Great Britain R
8、oyal Institute of British Architects Society of Motor Manufacturers and Traders Limited* Telecommunication Engineering and Manufacturing Association Water-tube Boilermakers Association The organizations marked with an asterisk in the above list, together with the following, were directly represented
9、 on the committee entrusted with the preparation of this British Standard: British Cast Iron Research Association British Rubber Manufacturers Association Fluid Seal Manufacturers Association Individual experts Amendments issued since publication Amd. No. Date of issue CommentsBS5341-5:1976 BSI 01-2
10、000 i Contents Page Cooperating organizations Inside front cover Foreword ii Section 1. General 1 Scope 1 2 References 1 Section 2. Ring groove dimensions and clearances 3 Ring groove widths 1 4 Ring groove root diameters 2 Section 3. Ring groove quality requirements 5 Groove concentricity 7 6 Geome
11、trical form tolerance 8 Section 4. Measuring procedures 7 Characteristics 10 Figure 1 Keystone (wedge) ring side clearance at gauge point 2 Figure 2 Ring groove waviness 8 Figure 3 Parallel sided ring groove parallelism 8 Figure 4 Keystone (wedge) ring groove angular tolerance 8 Figure 5 Ring groove
12、 run 9 Figure 6 to Figure 21 Various diagrams related to definitions and measuring procedures of ring groove characteristics 10 Table 1 Compression ring minimum side clearance 1 Table 2 Oil control ring minimum clearance 1 Table 3 15 and 6 Keystone (wedge) ring minimum side clearance 2 Table 4 Typic
13、al ring groove root diameter sizes in relation to nominal cylinder bore and maximum ring radial thickness 3 Table 5 Top compression ring groove widths in relation to ring widths and nominal cylinder bore 5 Table 6 Lower compression and oil control ring groove widths in relation to ring widths and no
14、minal cylinder bore 6 Table 7 15 Keystone (wedge) ring groove widths at measuring point 7 Table 8 6 Keystone (wedge) ring groove widths at measuring point 7 Table 9 Dimensions for groove root corner radius 9 Publications referred to Inside back coverBS5341-5:1976 ii BSI 01-2000 Foreword This British
15、 Standard was prepared under the authority of the Mechanical Engineering Standards Committee and specifies, in metric units, the data for a complete range of rationalized sizes for standard types of piston rings for reciprocating internal combustion engines. It has been prepared primarily to provide
16、 a basis for rationalization of sizes, materials and other characteristics of piston rings and incorporates current good practice used within the internal combustion engines industry. This standard supersedes BS3627“Dimensions of compression and oil control rings and piston ring grooves for i.c. eng
17、ines” (in imperial units) which, however, will be retained until such time as it is no longer required by industry. In the preparation of this standard, consideration was given to the equivalent German DIN Standards for piston rings for automotive engineering. The standard is prepared in five Parts.
18、 Other Parts of the standard are: Part 1: Designs, dimensions, materials and designations for single piece rings; Part 2: Designs, dimensions, materials and designations for multi-piece oil control rings 1) ; Part 3: Quality requirements; Part 4: Measuring and testing procedures. A British Standard
19、does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct 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 i
20、nside front cover, pages i and ii, pages1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. 1) In course of preparation.BS5341-5:1976 BSI
21、 01-2000 1 Section 1. General 1 Scope This Part of BS5341specifies ring groove dimensions, limits and methods of measuring for all piston ring grooves to suit the rings specified in Parts1and 2 2)of this British Standard and also the formulae for obtaining piston ring groove root diameters, limits a
22、nd typical piston ring groove root diameter sizes for the range of nominal cylinder bores from30mm to200mm diameter for both two-stroke and four-stroke cycle spark and compression ignition reciprocating internal combustion engines. NOTEIt is recommended that inspection procedures should be based on
23、BS 6000. 2 References The titles of the publications referred to in this standard are listed on the inside back cover. Section 2. Ring groove dimensions and clearances 3 Ring groove widths 3.1 Parallel sided grooves 3.1.1 Parallel sided ring groove widths shall be as specified in Table 5 and Table 6
24、. When compression and oil control rings having the widths specified in Table 5 and Table 6 respectively are assembled in these grooves, the minimum side clearances shall be as specified in Table 1 and Table 2. 3.1.2 Any deviations of the side clearances required for special applications shall be ob
25、tained by altering piston ring groove widths and not by changing the piston ring widths. Table 1 Compression ring minimum side clearance Table 2 Oil control ring minimum side clearance NOTEThe scraper ring being a dual purpose ring would normally be fitted with compression ring side clearance. 3.2 T
26、aper sided grooves 3.2.1 Taper sided ring groove widths shall be as specified in Table 7 and Table 8. When 15 or 6 Keystone (wedge) rings having the widths specified in Table 7 and Table 8 respectively are assembled in these grooves, the minimum side clearances shall be as given in Figure 1 and Tabl
27、e 3 when the piston ring is flush with the piston land immediately above the groove, taken on bottom limit of the minor axis with the measurements taken when the piston and the gauge are at standard temperature. 2) Part 2 in course of preparation. All dimensions are in millimetres. Nominal cylinder
28、bore d 1 Spark ignition engines Compression ignition engines Over Up to and including Top groove Lower grooves Top groove Lower grooves 100 174 100 174 200 0.040 0.065 0.040 0.040 0.065 0.065 0.075 0.040 0.040 0.065 All dimensions are in millimetres. Nominal cylinder bore d 1 Spark ignition engines
29、Compression ignition engines Over Up to and including 100 174 100 174 200 0.040 0.040 0.040 0.040 0.065BS5341-5:1976 2 BSI 01-2000 3.2.2 Any deviations of the side clearances required for special applications shall be obtained by altering piston ring groove widths and not by changing the piston ring
30、 widths. Table 3 15 and 6 Keystone (wedge) ring minimum side clearance 4 Ring groove root diameters Ring groove root diameters shall be as specified in Table 4 and are calculated from the following formulae: compression ring grooves D 2= d 1 (2a 1+ 0.006d 1+ 0.50) oil control ring grooves D 2= d 1 (
31、2a 1+ 0.006d 1+ 1.50) where NOTE 1For rings of intermediate sizes and oversizes for reboring, the ring groove root diameters of the next smaller nominal bore are increased by the amount of oversize. NOTE 2The scraper ring being a dual purpose ring would normally be fitted with compression ring groov
32、e root diameter. Figure 1 Keystone (wedge) ring side clearance at gauge point All dimensions are in millimetres. Type of ring Minimum side clearance at gauge point 6 Keystone (wedge) 15 Keystone (wedge) 0.075 0.040 D 2 is the maximum ring groove root diameter a ; d 1 is the nominal cylinder bore or
33、ring diameter; a 1 is the maximum radial thickness given in column 2 of Table 4 (taken from dimensional tables in Part 1 of this standard). a Tolerance on these diameters is 0.250 mm.BS5341-5:1976 BSI 01-2000 3 Table 4 Typical ring groove root diameter sizes in relation to nominal cylinder bore and
34、maximum ring radial thickness All dimensions are in millimetres. Nominal cylinder bore d 1 Ring maximum radial thickness Ring groove root diameter D 2 Compression Oil control Maximum Minimum Maximum Minimum 30 32 34 1.35 1.45 1.55 26.620 28.408 30.196 26.370 28.158 29.946 35 36 38 1.55 1.6 1.7 31.19
35、0 32.084 33.872 30.940 31.834 33.622 40 42 44 1.8 1.85 1.95 35.660 37.548 39.336 35.410 37.298 39.086 45 46 48 2.0 2.05 2.1 40.230 41.124 43.012 39.980 40.874 42.762 50 52 53 54 2.2 2.3 2.35 2.4 44.800 46.588 47.482 48.376 44.550 46.338 47.232 48.126 43.800 45.588 46.482 47.376 43.550 45.338 46.232
36、47.126 55 56 58 2.4 2.45 2.55 49.370 50.264 52.052 49.120 50.014 51.802 48.370 49.264 51.052 48.120 49.014 50.802 60 62 63 64 2.65 2.7 2.75 2.8 53.840 55.728 56.622 57.516 53.590 55.478 56.372 57.266 52.840 54.728 55.622 56.516 52.590 54.478 55.372 56.266 65 66 67 2.85 2.9 2.9 58.410 59.304 60.298 5
37、8.160 59.054 60.048 57.410 58.304 59.298 57.160 58.054 59.048 68 70 72 74 2.95 3.05 3.15 3.2 61.192 62.980 64.768 66.656 60.942 62.730 64.518 66.406 60.192 61.980 63.768 65.656 59.942 61.730 63.518 65.406 75 76 78 3.25 3.3 3.4 67.550 68.444 70.232 67.300 68.194 69.982 66.550 67.444 69.232 66.300 67.
38、194 68.982 80 82 84 3.45 3.55 3.65 72.120 73.908 75.696 71.870 73.658 75.446 71.120 72.908 74.696 70.870 72.658 74.446 85 86 88 3.7 3.7 3.8 76.590 77.584 79.372 76.340 77.334 79.122 75.590 76.584 78.372 75.340 76.334 78.122 90 92 94 3.9 4.0 4.05 81.160 82.948 84.836 80.910 82.698 84.586 80.160 81.94
39、8 83.836 79.910 81.698 83.586 95 96 98 4.1 4.15 4.25 85.730 86.624 88.412 85.480 86.374 88.162 84.730 85.624 87.412 84.480 85.374 87.162BS5341-5:1976 4 BSI 01-2000 Table 4 Typical ring groove root diameter sizes in relation to nominal cylinder bore and maximum ring radial thickness All dimensions ar
40、e in millimetres. Nominal cylinder bore d 1 Ring maximum radial thickness Ring groove root diameter D 2 Compression Oil control Maximum Minimum Maximum Minimum 100 102 104 4.3 4.4 4.4 90.300 92.088 94.076 90.050 91.838 93.826 89.300 91.088 93.076 89.050 90.838 92.826 105 106 108 4.55 4.6 4.6 94.770
41、95.664 97.652 94.520 95.414 97.402 93.770 94.664 96.652 93.520 94.414 96.402 110 112 114 4.7 4.8 4.8 99.440 101.228 103.216 99.190 100.978 102.966 98.440 100.228 102.216 98.190 99.978 101.966 115 116 118 4.9 4.9 5.0 104.010 105.004 106.792 103.760 104.754 106.542 103.010 104.004 105.792 102.760 103.
42、754 105.542 120 122 124 5.1 5.1 5.1 108.580 110.568 112.556 108.330 110.318 112.306 107.580 109.568 111.556 107.330 109.318 111.306 125 126 128 5.3 5.3 5.3 113.150 114.144 116.132 112.900 113.894 115.882 112.150 113.144 115.132 111.900 112.894 114.882 130 132 134 5.5 5.5 5.5 117.720 119.708 121.696
43、117.470 119.458 121.446 116.720 118.708 120.696 116.470 118.458 120.446 135 136 138 5.6 5.6 5.6 122.490 123.484 125.472 122.240 123.234 125.222 121.490 122.484 124.472 121.240 122.234 124.222 140 142 144 5.8 5.8 5.8 127.060 129.048 131.036 126.810 128.798 130.786 126.060 128.048 130.036 125.810 127.
44、798 129.786 145 146 148 6.0 6.0 6.0 131.630 132.624 134.612 131.380 132.374 134.362 130.630 131.624 133.612 130.380 131.374 133.362 150 152 154 6.1 6.1 6.1 136.400 138.388 140.376 136.150 138.138 140.126 135.400 137.388 139.376 135.150 137.138 139.126 155 156 158 6.3 6.3 6.3 140.970 141.964 143.952
45、140.720 141.714 143.702 139.970 140.964 142.952 139.720 140.714 142.702 160 162 164 6.5 6.5 6.5 145.540 147.528 149.516 145.290 147.278 149.266 144.540 146.528 148.516 144.290 146.278 148.266 165 166 168 6.6 6.6 6.6 150.310 151.304 153.292 150.060 151.054 153.042 149.310 150.304 152.292 149.060 150.
46、054 152.042 170 172 174 6.8 6.8 6.8 154.880 156.868 158.856 154.630 156.618 158.606 153.880 155.868 157.856 153.630 155.618 157.606BS5341-5:1976 BSI 01-2000 5 Table 4 Typical ring groove root diameter sizes in relation to nominal cylinder bore and maximum ring radial thickness Table 5 Top compressio
47、n ring groove widths in relation to ring widths and nominal cylinderbore a All dimensions are in millimetres. Nominal cylinder bore d 1 Ring maximum radial thickness Ring groove root diameter D 2 Compression Oil control Maximum Minimum Maximum Minimum 175 176 178 7.05 7.05 7.05 159.350 160.344 162.3
48、32 159.100 160.094 162.082 158.350 159.344 161.332 158.100 159.094 161.082 180 182 184 7.25 7.25 7.25 163.920 165.908 167.896 163.670 165.658 167.646 162.920 164.908 166.896 162.670 164.658 166.646 185 186 188 7.35 7.35 7.35 168.690 169.684 171.672 168.440 169.434 171.422 167.690 168.684 170.672 167
49、.440 168.434 170.422 190 192 194 7.55 7.55 7.55 173.260 175.248 177.236 173.010 174.998 176.986 172.260 174.248 176.236 172.010 173.998 175.986 195 196 198 200 7.65 7.65 7.65 7.85 178.030 179.024 181.012 182.600 177.780 178.774 180.762 182.350 177.030 178.024 180.012 181.600 176.780 177.774 179.762 181.350 All dimensions are in millimetres. Nominal cylinder bore d 1 Engine type Ring width h 1 Nom. Max. Min. 1.5 1.490 1.475 2.0 1.990 1.975
