1、CEN PREN*378L 92 3404589 0033524 709 = Edition approved for publication Comments should be sent within six months after the date of publication decision A.E.C.M.A. Technopolis - 175, rue Jean-Jacques Rousseau 921 38 Issy-les-Moulineaux Cdex - FRANCE 1992-08-31 A. E. C. M. A. STAN DAR D prEN 3781 NOR
2、ME A.E.C.M.A. Issue P 1 A.E.C.M.A. NORM August 1992 EDIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATERIEL AEROSPATIAL Technopolis - 175. rue Jean-Jacques Rousseau - F-92138 Issy-les-Moulineaux Cdex - T1 (1) 47 36 98 76 C8 Chairman M. WILLIAMS UDC Key words : ENGLISH VERSION Aerospace series
3、Grooves for spiral wound retaining rings Design standard Srie arospatiale Gorges pour anneaux darrt spirals Norme de conception Luft- und Raumfahrt Nuten fr Spiralsicherungsringe Konstruktionsnorm This .Aerospace Series. pre-standard has been drawn up under the responsibility of AECMA (Association E
4、uropenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical c
5、ontent shallnot be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it wil
6、l be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. . -_- CEN PRENm378L 92 9 3404589 0033525 645 prEN 3781 Page 3 O Introduction The retaining rings consist of two turns of flat spring steel strip formed in a continuous helix and are concentric
7、 with no projecting ears or lugs. There are two types of these rings, in-springing for use on external grooves (see figure 1) and out-springing for use on internal grooves (see figure 2). Figure 1 Figure 2 1 Scope and field of application This standard defines the groove dimensions for retaining rin
8、gs. It is applicable for rings as per MA 4016 for use on external grooves and rings as per MA 4017 for use on internal grooves. Previous page is blank - _II_II_ CEN PREN*378L 92 3404589 0031526 582 prEN 3781 Page 4 2 References MA 401 6, Ring, retaining - External, spiral wound, heavy and medium dut
9、y, cres, metric - 1987 ) MA 401 7, Ring, retaining -hternal, spiral wound, heavy and medium duty, cres, metric - 1987 3 Fitting and removal These retaining rings may be fitted -or removed without the use of circlip pliers or other special tools. 3.1 Fitting A ring is fitted into its appropriate groo
10、ve by separating the coils, inserting one end of the ring into the groove and, keeping the coils separated, spiralling each turn of the ring into the groove. 3.2 Removal A ring may be removed by insertingrna small screw-driver, or similar tool, into the notch or slot provided at the coil ends and pr
11、ising until that coil end is free of the groove, and then spiralling each coil out until the complete ring is free of the groove. 4 Clearance for installation and removal Since the radial walls of all retaining rings are uniform, with no projecting ears or lugs, the total clearance required for inst
12、allation or removal equals the radial wall of the ring, plus a radial clearance of at least 0,5 mm. This free space (min. 0,5 mm) should be adequate to permit easy installation and removal of the ring. Figure 3 This standard is published by : Society of Automotive Engineers, 400 Commonwealth Drive,
13、Warrendale, PA 15096 - United States. CEN PRENu3781 92 3404589 0033527 438 prEN 3781 Page 5 tolerance E 0,05 0,15 5 Required characteristics Dimensions are in millimetres. 5.1 See figures 4 and 5 and tables 1 and 2. External grooves for spiral wound retaining rings as per MA 4016 from to 18 28 29 55
14、 x (IO: I) 0,20 0,25 0.30 R, max. sharp-edged 56 80 82 150 155 280 Figure 4 Table 1 I Groove runout I Basic shaft diameter A 1 Recommendation max. chamfer or max. radius I I Maximum allowable chamfer or radius of retained part max. chamfer or max. radius = 0,375 (V - MI V = nom. radial width = 0,5 (
15、V max. + V min.) M = nom. depth = 0,5 (A - B) Figure 5 CEN PREN*3781 92 3404589 0033528 354 M prEN 3781 Page 6 Table 2 B C .Ring dimensions I v Max. chamfer or max. radius I RD max. diameter A O 16,92 - 0.07 E019 19 E020 20 E021 21 E022 22 E023 23 E024 24 E025 25 E026 26 0,40 O 18,77 - 0,07 O 19,72
16、- 0,07 0.13 1,24 f 0.04 0,45 0,50 O 26,30 - 0,lO O 27,27 -0,lO E029 29 0.65 I E030 I 30 O 28,25 - 0,lO O 29,17 -0.10 I E034 1,45 f 0,05 O - 0,lO - 0.10 30,l O O 31.90 0,75 0,25 O 33.75 - 0,lO 0,70 I E037 37 34,67 f0,15 35,65 f 0,15 37,55 f 0,15 I I E038 I 38 0,75 39,45 f 0,15 I I E045 I 45 42,25 & 0
17、.15 0,70 I E046 I 46 43,15 f 0,15 44,31 f 0,15 45.05 5 0.15 1,80 f 0,05 I I 1 .o0 0,95 0,85 I E050 I 50 47.05 f 0,15 50,15 f 0,15 51.15 f 0,15 52.15 f 0.15 I E056 53.15 & 0,15 1,47 I 0,05 54,15 f 0.15 56.01 -C 0,15 57,Ol i 0,15 58,Ol f 0,15 )art of designation figure 5. I E058 I 58 0.95 I E059 I 59
18、I E060 60 I Dimensions do not form a Recommendation on1 Ring dimensions I Max. chamfer or rnax. radius “ B Diameter Basic shaft code diameter A C 3.38 0,50 E061 E062 E063 61 58.91 I 0.15 62 59.91 f 0.15 63 60.91 f0.15 3.63 1 ,o0 E065 E066 E067 E068 65 62.81 f 0.15 66 63,79 f 0,15 67 64.71 f 0.15 1,4
19、7 f 0,05 68 65.71 f 0.15 3.89 1 ,O5 E078 E080 78 75,55 f 0.15 80 77.51 f 0,15 E100 El 05 1 O0 I 97,Ol f 0,15 105 I 101,85 f 0.15 5.64 5.89 1.55 1.60 El 25 125 1121.45 f 0.15 El 35 El 40 135 I131,27 f 0.17 2,07 f 0,06 140 136.25 f 0,17 E145 El 50 El 55 145 141,17 f 0.17 150 146.17 f 0,17 155 150.60 f
20、 0.20 prEN 3781 Page 7 Table 2 (concluded) RD rnax. rnax. I 3.58 E064 I 64 I 61.91 f 0.15 I 3.84 EO69 I 69 I 66.71 f 0.15 I 4.09 67,71 f 0,15 68.71 i: 0.15 E07 2 69,65 f 0,15 4.11 1 1.15 4.37 1,20 4.62 E082 I 82 I 79,45 f 0.15 E085 I 85 I 82.35 f 0.15 4.88 4*62 I 1,30 I I 85.31 % 0,15 E088 88 E090 I
21、 90 I 87.21 f 0.15 5.13 1.80 * 0.06 I I E095 I 95 I 92.15 f 0.15 5.38 5,64 53 I 1.50 5.89 Ell5 I 115 I111,55 f 0.15 I 6.15 0.25 6.45 I 2.15 155.60 f 0.20 160,60 f 0.20 El 70 165,40 f 0.20 E175 175 170,40 f 0.20 7.72 I 8.03 I I E180 I 180 I 175.20 f 0.20 I I 180,20 f 0.20 El 85 185 El 90 190 185,20 f
22、 0.20 El 95 195 E210 I 210 I204,60 f 0.20 E220 I 220 I 214.40 f 0.20 9.53 243.80 f 0,20 253.60 f 0.20 263.40 f 0.20 E280 280 273,20 f 0.20 1 2.30 I Dimensions do not form a part of designation. z, Recommendation only, see figure 5. prEN 3781 Page 8 5.2 Internal grooves for spiral wound retaining rin
23、gs as per MA 4017 See figures 6 and 7 and tables 3 and 4. Y Y (IO: 1) R, max.1 Figure 6 Table 3 Groove runout Nominal bore diameter F tolerance K from to 0.05 20 I 28 0,15 I 29 I 55 0,20 56 80 I 0,30 I 155 I 280 I 0,25 82 15 Recommendation : max, chamfer or max, radius r Maximum allowable chamfer or
24、 radius of retained part max. chamfer or Max. radius = 0,375 (W - N) W = nom. radial width = 0,5 (W max. -t W min.) N = nom. depth = 0,5 (G - FI - Figure 7 - CEN PRENr37L 92 W 3404589 0033533 949 W prEN 3781 Page 9 Table 4 Ring dimensions I Diameter code G H Jlax. chamfer o nax. radius I Nominal bor
25、e diameter F RJ max. min. 1.78 rnax. 1.98 Y020 20 + 0.07 O 21,23 1.04 f 0,04 Y021 21 + 0,07 22.28 0,45 Y022 + 0,07 O + 0,07 O 23,38 24.43 22 23 0,13 2.24 2.03 Y023 0.55 + 0,07 25.48 24 1.24 f 0.04 Y024 Y025 Y026 26.68 Io7 O 25 26 0,50 + 0,07 27,78 o 28.88 + 0.07 O Y027 27 0,65 Y028 28 + 0,07 29.88 o
26、 Y029 29 + 0,lO 30,95 2.69 2.49 + 0.10 O + 0.10 O + 0,lO 34.00 O + 0,lO 36.20 o 32.00 33,05 Y030 Y03 1 30 31 0,60 1.45 f 0,oc Y032 Y034 32 34 Y035 35 + 0.10 37,30 o 0,25 0.70 Y036 36 38.40 :lo 3,07 2,87 Y037 37 39,40 -i- o1o O + 0.10 40.50 O 38 0.65 Y038 Y040 40 + 0,lO 42,50 0.75 42 Y042 Y045 3.33 3
27、,12 44,60 f 0.10 47.70 f 0,lO 45 0,70 1,80 f 0.0: Y046 Y047 46 47 48,80 f 0.10 49.90 f 0.10 51,OO f 0,lO 53.20 f 0.10 0.95 Y048 4,09 3,89 48 50 Y050 Y052 52 53,80 f 0,12 1,47 f O,O! 3,33 3,12 0,90 Y053 53 54.80 f 0,12 Dimensions do not form a part of designation. 2, Recommendation only, see figure 7
28、. prEN 3781 Page 10 Table 4 (continued) isions Max. chamfer o max. radius I 21 G H Diameter Nominal bore code diameter F RJ max. min. 3.38 max. 3.58 Y055 55 56,85 f 0,15 Y056 56 57,85 4. 0,15 0,95 Y058 I 58 I 59,85 f 0,15 Y059 I 59 1 60.93 f 0.15 I I Y060 I 60 I 61,99 f O,15 Y061 61 63,09 f 0,15 I Y
29、062 62 64,09 f 0,15 Y063 63 65,09 f 0,15 Y064 64 66,19 f 0,15 Y065 65 67,19 f 0,15 Y066 66 68.19 i 0.15 1 ,o0 3,84 3,63 1,47 f 0,05 I . Y067 I 67 I 69,25 f 0,15 Y068 I 68 I 70,29 f 0,15 Y069 I 69 I 71,29 it 0,15 4,09 3,88 1 ,O5 I Y070 I 70 I 72,29 It 0,15 Y07 1 71 73,29 f 0,15 Y072 72 74,39 f 0,15 Y
30、075 75 77,39 f 0,15 4.39 4,11 1,15 80,45 f 0,15 82,49 f 0,15 Y082 84,55 f 0.15 Y085 87.65 I: 0.15 4,62 4,37 1,25 1,20 1,30 4,88 4,62 0,25 YO88 1 88 I 90,69 f 0,15 YO90 I 90 I 92,79 f 0,15 4,88 1.35 5,13 94,85 f 0,15 97,85 f 0,15 100,99 f 0,15 Y100 1 O0 102,99 f 0,15 Y102 102 105.15 I: 0.15 1,80 f 0,
31、Of 5,38 5,13 1,40 1,50 5,64 5.38 Y105 I 105 1108,15 f 0,15 Y108 I 108 I 111,31 f 0,15 5,89 5,64 1,55 I I Y110 I 110 I 113.31 f 0.15 5.89 1,60 6.15 Y112 112 115,45 f0,15 Y115 115 118,45 f 0,15 Y120 120 123,55 f 0,15 Y125 125 128,55 f 0,15 1,70 Y130 I 130 I133,65 f 0,15 6,45 6,20 Y135 I 135 I138,62 f
32、0,18 Y140 I 140 1143.72 f 0.18 2,07 f 0,Oi 1,65 Y150 I 150 1153.82 f 0,18 Y155 155 159,40 f 0,20 Y160 160 164,40 i 0,20 2,48 4 0,O Y165 165 169.40 zk 0.20 7,72 2,15 8,03 l) Dimensions do not form a part of designation. 2, Recommendation only, see figure 7. 11 - SF-04-92-T4 -_ _ _ _ CEN PREN*1783 72
33、W 3404589 0033533 733 W Ring dimensions ?I prEN 3781 Page 11 Max. chamfer or max. radius ? Table 4 (concluded) Y170 Y175 Y180 I Diameter I Nominal bore I t. 170 174,60 f 0,20 175 179.60 f 0,20 180 184.88 f 0.20 U I 1 code I diameter F Y210 Y220 Y230 210 215,40 f 0,20 2 20 225,64 f 0,20 230 235.90 f
34、0,20 189.88 f 0,20 194.88 f 0,20 Y195 200,14 f 0,20 Y200 200 205.14 f 0.20 Y270 Y280 270 I276,40 I 0,20 280 286,66 f 0,20 245,90 f 0.20 256,16 f 0,20 Y260 266,40 f 0.20 Description block Identity block I ?I Dimensions do not form a part of designation. H 2,48 f 0.07 RJ max. 0,25 min. I I max. 8.03 9.63 I Recommendation only. see figure 7. I 6 Designation Example : Number of this standard 1 Diameter code (see table 2 or table 4) prEN 3781 Page 12 7 Indication on drawings Example GROOVE EN3781E050 Figure 8 Alternatively the groove may be fully dimensioned on the drawing.
