1、AECMA STANDARD NORME AECMA AECMA NORM Edition approved for publication 2002-03-29 prEN 2288 Edition P 1 March 2002 Comments should be sent within six months afier the date of publication to Gulledelie 94 AECMA-STAN B-1200 BRUXELLES PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STAN
2、DARDIZATION (AECMA-STAN) Guiledelle 94 - 8-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Will supersede ICs: EN 2288: 1989 Descriptors: ENGLISH VERSION Aerospace series Bushes, flanged corrosion resisting steel with self-lubricating liner Dimensions and loads Srie arospatiale Bagu
3、es paulement en acier rsistant la corrosion garniture autolubrifiante Dimensions et charges Luft- und Raumfahrt Buchsen mit Flansch aus korrosionsbestndigem Stahl mit selbstschmierender Beschichtung Mae und Belastungen This Verospace Series“ Prestandard has been drawn up under the responsibility of
4、AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this P
5、restandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard t
6、o CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 92138 ISSY-LES-MOULINEAUX CEDEX I I Mechanical Domain Mr Feltham Page 2 prEN 2288: 2002 Contents Page 3 3 3 6 6 Technical specification
7、. 6 7 Normative references . Required characteristics . Design recommendation . Page 3 prEN 2288: 2002 1 Scope This standard specifies the characteristics of flanged bushes in corrosion resisting steel with self-lubricating liner and the design recommendation of shafts and housings. The bushes are i
8、ntended for operation within the temperature range of - 55 OC to 163 OC and assembly with an interference fit into fixed and moving aerospace parts. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative reference
9、s are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the late
10、st edition of the publication referred to applies. EN 2311 EN 3161 EN 3490 3 3.1 Aerospace series - Bushes with self-lubricating liner - Technical specification Aerospace series - Steel FE-PM3801 (X5CrNiCu17-4) - Air melted - Solution treated and precipitation treated - Bar - a or D I 200 mm - Rm 2
11、930 MPa 1) Aerospace series - Steel FE-PM3901 (XI 5CrNil7-3) - Air melted - Hardened and tempered - Bar for machining - De I 200 mm - 900 MPa I Rm 5 1 1 O0 MPa 1) Required characteristics Configuration - Dimensions - Masses Configuration: according to figure 1. Dimensions, masses: according to figur
12、e 1 and table I. 3.2 Surface roughness According to figure I. 3.3 Materials Bush: Steel according to EN 3161 or EN 3490. Liner: Self-lubricating wear resistant material consistent with the requirements of EN 231 I. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4
13、prEN 2288: 2002 g ),65 to ),go - 3,95 to I ,20 X 12 O -0,l 13 - 23 Dimensions in millimetres 6 8 10 12 15 16 18 20 22 25 28 30 32 15“iZ 35 40 45 50 T= 0,Bmax. 28 34 40 30 36 42 35 42 47 52 40 + 48 45 52 +51 57 50 58 32 62 The recommended sizes are indicated by *. - - 32 5 :; 44 - - +4a - 0,Bmax. L Y
14、 Chamfer or radius at manufacturers option Chamfer machined before bonding Chamfer machined after bonding Figure 1 Table 1 Dimensions in millimetres Il - 0,l - 0.4 Mass in kgll O00 pieces I Page 5 prEN 2288: 2002 mm Table 2 mm kN kN kN 66 73 3,O 12,9 d 1 I, I Permissible radial load IPermissible nm
15、d 1 /, I Permissible radial load mm kN kN 15 126,4 50,6 Permissible axial static load kN c,” 15,6 6 10,o 4,O 88 16,9 6,8 28 20 186,6 74,6 22 210,7 84,3 101 81 21 ,l 8,4 18,4 30 20 200,o 80,O 22 225.8 90.3 25 30 2643 1058 329,O 131,6 15 20 144,5 57,8 21 3,3 853 l5 83,6 10 41,9 16,8 12 54,8 21,9 15 74
16、,2 29,7 15 11 32 22 240,8 96,3 25 282,l 112,8 16 8 31 ,O 12,4 10 44,7 17,9 12 58,5 23,4 87,8 15 79,l 31,6 16 86,O 34,3 10 58.3 20.1 32 20 378,4 151,l 233,3 93.3 35 22 263,4 1054 25 3083 123,4 l8 95,9 12 65,8 26,3 15 89,O 35.5 18 10 112,2 44,8 559 22,4 2o 104 12 73,l 29,2 15 98,9 39,6 35 40 524,6 209
17、,8 610,6 244,2 22 12 80,4 32,2 15 108,8 433 20 156,l 62,4 112,2 22 12 15 175,O 70,O 69,9 28,O 123.6 49.4 25 I 1 20 I 177,4 I 71 ,O 124,4 axial Static Dynayic static 187,7 6 I 12.5 I 5.0 I 25 I 246.8 I 98.5 1 I 28 I 282,9 I 113,O I 10 I 29.7 I 11.9 I 1 15 I 135.5 I 54.2 198,6 71,4 333 13,4 43,9 17,6
18、29,O I 11,6 209,4 I 30 1 350.9 I 140.1 2258 I 30 I 383.8 I 153.5 1 I 35 I 459,O I 183,6 - 40 I 20 I 266.6 I 106.6 253 I 20 I 141.9 I 56.8 I 25 I 396.7 I 158.7 45 45 783,7 313,5 25 440,8 176,3 I 30 I 548,3 I 219,3 35 655,8 262,3 40 763.3 305.3 307,4 1 22 I 198.9 I 79.6 I 45 1 870,8 I 348,3 231 ,I 92,
19、4 I 50 I 978.3 I 391.3 a Cs = 0,43 d (II - 1,2 - r1 max. - 12 rnax.) kN - based on a unit pressure of 430 MPa. Values of ri max. and 12 max. derived from the values of fl and 12 given in table 1. - cc kN b c25 - 2,5 Ca = 0,34 (di - 1,5)* - (d + 2,5) kN Definitions of all loads are given in EN 231 I.
20、 Page 6 prEN 2288: 2002 Description block 4 Designation EXAMPLE: Identity block EN2288-12gA 2- Number of this standard Code for diameter d (see table 1) NOTE 1 The number of characters is constant, Zero (O) is inserted to the left of the figure when the diameter d or length Il is less than IO. NOTE
21、2 If necessary, the code 19005 shall be placed between the description block and the identity block NOTE 3 Parts manufactured before the issue of this standard shall be accepted without technology code. A B Without code Table 3 Bonded fabric liner Injection moulded liner Both technologies can be use
22、d at users convenience Technology I code I Technology 5 Marking In addition to the manufacturers own marking, each bush and its package shall be marked with the identity block specified in clause 4 of this standard. The technology used by the manufacturer shall be stated within the identity block. M
23、arking position and method are at manufacturers option and shall not have any detrimental effect on the bush. Bushes which are too small to be marked with the full information required shall have this on the package only. 6 Technical specification According to EN 231 1. Page 7 prEN 2288: 2002 7 Desi
24、gn recommendation Bushes defined by this standard are intended to be installed by interference fit methods (see figure2). Therefore, the loads given in table 2 can only be ensured if the following mounting is applied. Key I Shaft 2 Bush 3 Housing * Housing diameter D H7 Shaft diameter d f6 Figure 2
25、Hardness of the shaft: 50 HRC min. Surface roughness of the shaft: according to figure 2. The reduction in bore diameter d (see figure I), due to interference fit of the bush in the housing, has been taken into account when selecting tolerances for the shaft: f6 (clearance fit). When applied in actual usage, the coefficient of friction under load could be different from that defined in EN 231 1, since it depends on the following shaft definitions: Material, hardness, surface finish, surface treatment and installation conditions.
