1、AECMA STANDARD prEN 2287 NORME AECMA Edition P 1 AECMA NORM March 2002 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 6-1200 BRUXELLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Will supersede ICs: EN 2287: 1989 ENGLISH VERSION Aer
2、ospace series Bushes, plain corrosion resisting steel with self-lubricating liner Dimensions and loads Srie arospatiale Bagues cylindriques en acier rsistant la corrosion garniture autolubrifiante Dimensions et charges Luft- und Raumfahrt Buchsen ohne Flansch aus korrosionbestndigem stahl mit selbst
3、schmierender Beschichtung Mae und Belastungen This “Aerospace Series Prestandard has been drawn up under the responsibility of 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
4、 technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standar
5、d. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. I Edition approved for publication I Comments should be sent within six months after the date of Dublicaion t
6、o 2002-03-29 AECMA-STAN Gulledelle 94 Mechanical Domain Mr Feltham 8-1200 BRUXELLES aecma 20i Page 2 prEN 2287: 2002 Contents Scope. . 3 Normative referen . 3 Required characteristics 3 Designation 6 Marking 6 Technical specification 6 Design recommendation . 7 Page 3 prEN 2287: 2002 1 Scope This st
7、andard specifies the characteristics of plain bushes in corrosion resisting steel with self-lubricating liner and the design recommendation of shafts and housings. The bushes are intended for operation within the temperature range of - 55 OC to 163 OC and assembly with an interference fit into fixed
8、 and moving aerospace parts. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subse
9、quent 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 latest edition of the publication referred to applies. EN 231 1 EN 3161 EN 3490 3 3.1 Aerospace series - Bushes with self-lu
10、bricating liner - Technical specification Aerospace series - Steel FE-PM3801 (XSCrNiCul7-4) - Air melted - Solution treated and precipitation treated - Bar - a or D 5 200 mm - R, 2 930 MPa 1) Aerospace series - Steel FE-PM3901 (XI 5CrNil7-3) - Air melted - Hardened and tempered - Bar for machining -
11、 De 5 200 mm - 900 MPa 5 R, I 1 1 O0 MPa 1) Required characteristics Configuration - Dimensions - Masses Configuration: according to figure 1. Dimensions, masses: according to figure 1 and table I. 3.2 Surface roughness According to figure 1. 3.3 Materials Bush: Steel according to EN 31 61 or EN 349
12、0. Liner: Self-lubricating wear resistant material consistent with the requirements of EN 231 1. 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 2287: 2002 Dimensions in millimetres a 0,50 to0,75 Chamfer machined before bonding d/D X 0,5max. IJ 0,5max. I 0,8
13、max. Chamfer or radius at manufacturers option Chamfer machined after bonding Figure I Table I Dimensions in millimetres I - 0,l - 0,4 6 8 10 12 15 16 18 20 22 25 28 30 32 35 40 45 50 Mass in kg/l O00 pieces Only bushes whose masses lie within the bold lines are standard. The recommended sizes are i
14、ndicated by *. I Page 5 prEN 2287: 2002 Table 2 - d nm 6 8 - - 10 - 12 - 15 - 16 - 18 - 20 - a b I C, = 0,43 d (I - 2) kN - Based on a unit pressure of 430 MPa. kNI - cs c25 - 2,5 I Definitions of all loads are given in EN 231 1. Page 6 prEN 2287: 2002 Number of this standard Code for diameter d (se
15、e table 1) 4 Designation EXAMPLE: Technology code A B Technology Bonded fabric liner Injection moulded liner ! Without code NOTE I The number of characters is constant, Zero (O) is inserted to the left of the figure when the diameter d or length I is less than IO. NOTE 2 If necessary, the code 19005
16、 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. Both technologies can be used at users convenience 5 Marking In addition to the manufacturers own marking, each bush and its pa
17、ckage 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. Marking position and method are at manufacturers option and shall not have any detrimental effect on the bush. Bushes which are too
18、 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 2287: 2002 7 Design recommendation Bushes defined by this standard are intended to be installed by interference fit methods (see figure2). Therefor
19、e, the loads given in table 2 can only be ensured if the following mounting is applied. 3 Key i Shaft 2 Bush 3 Housing a Housing diameter D H7 Shaft diameter d ffi Figure 2 Hardness of the shaft: 50 HRC min. Surface roughness of the shaft: according to figure 2. The reduction in bore diameter d (see
20、 figure l), 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 foll
21、owing shafi definitions: Material, hardness, surface finish, surface treatment and installation conditions. AECMA STANDARD prEN 2287 NORME AECMA Edition P I AECMA NORM March 2002 PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION (AECMA-STAN) Gulledelle 94 - 6-1200 BRUXE
22、LLES - Tel. (+32) 2 775 81 10 - Fax. (+32) 2 775 81 11 Edition approved for publication Comments should be sent within six months after the date of oublication to ICs: Mechanical Domain Will supersede EN 2287: 1989 Descriptors: ENGLISH VERSION Aerospace series Bushes, plain corrosion resisting steel
23、 with self-lubricating liner Dimensions and loads Srie arospatiale Bagues cylindriques en acier rsistant la corrosion garniture autolubrifiante Dimensions et charges Luft- und Raumfahrt Buchsen ohne Flansch aus korrosionbestndigem stahl mit selbstschmierender Beschichtung Mae und Belastungen This “A
24、erospace Series“ Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industty. It has been technically approved by the experts of the concerne
25、d Domain following member comments. Subsequent to the publication of this Prestandard, 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
26、agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. 2002-03-29 AECMA-STAN Gulledelle 94 B-1200 BRUXELLES Mr Feltharn I I 0 aecma 200 Page 2 prEN 2287: 2002 Contents Page 3 3 3 6 Marking 6 Technical specification .
27、 6 Normative references . . Design recommendation . 7 Page 3 prEN 2287: 2002 I Scope This standard specifies the characteristics of plain bushes in corrosion resisting steel with self-lubricating liner and the design recommendation of shafts and housings. The bushes are intended for operation within
28、 the temperature range of - 55 “C 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 references are cited at the appropria
29、te 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 latest edition of the publicatio
30、n referred to applies. EN 231 1 Aerospace series - Bushes with self-lubricating liner - Technical specification EN 3161 Aerospace series - Steel FE-PM3801 (X5CrNiCu17-4) - Air melted - Solution treated and precipitation treated - Bar - a or D I 200 mm - R, 2 930 MPa 1) EN 3490 Aerospace series - Ste
31、el FE-PM3901 (XI 5CrNil7-3) - Air melted - Hardened and tempered - Bar for machining - De I 200 mm - 900 MPa 5 R, I 1 100 MPa 1) 1 3 Required characteristics 3.1 Configuration: according to figure 1. Configuration - Dimensions - Masses Dimensions, masses: according to figure 1 and table 1 3.2 Surfac
32、e roughness According to figure 1. b 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 prEN 2287: 2002 d Dimensio
33、ns in millimetres I - 0,4 D - 0,l X u 6 8 10 12 15 16 18 20 22 25 28 30 32 35 40 45 50 u - ma- go .c a E ac E.2 mE E.: tuE sao i= 2- io z io Mass in kg/l O00 pieces - - - - + 24 10 2,4* - - - 8 +27 12 3,O 4,O - - 6 +22 +4 - - - - - - IO + 14 f: 3,5 4,7 59 - - - h 35 42 - - - - 66,6 73,5 83,6 - 100,3
34、 - 117,o - - - - - 40 f4: 48 -_ - - - 87,O - 103,8 - 130,O - 152,2 174,O - - - 45 52 +5, - - - - - - - - 105,O - 126,O - 147,O 168,O 189,O - - - - 133,5 - 160,2 - 186,9 214,O 240.3 267.0 J 58 +32 - - - - - - - - 50 Only bushes whose masses lie within the bold lines are standard. The recommended size
35、s are indicated by *. V I &u: I f 9 8 T a OSO to 0,75 Chamfer machined before bonding 4 I 0,5max. I- OBmax ?E= 0,Bmax. Chamfer or radius at manufacturers option Chamfer machined after bonding Figure I Table 1 Dimensions in millimetres Page 5 prEN 2287: 2002 d Table 2 I Permissible radial load d I Pe
36、rmissible radial load d I Static Dynamic Static Dynamic 1 1 cs” 1 C25b (1 1 I CS” I C25b / I mm mm kN kN mm mm kN 20,6 83 10 34,4 13,8 49,l 12 94,6 15 123,O I II I II II I 25 12 41,3 51,6 20,6 I II 1 II I I I I II I 16 12 68,8 27,5 15 167,7 66,9 71,4 15 89,4 35,7 20 232,2 16 96,3 38,4 IO 61,9 24,8 2
37、5 296,7 12 77,4 30,9 30 361,2 15 100,6 40,2 15 178,9 18 I I 1 I I II II I 40 25 30 35 40 45 25 30 35 - - - - - - - - Permissible radial load I Static Dynamic Cs” I G5b I 412.8 I 164.8 I 270,9 108,2 301 ,O 120,2 I I 7353 293,6 832,l 332,l 494,5 197,4 602,O 240,3 I a Cs = 0,43 d (I - 2) kN - Based on
38、a unit pressure of 430 MPa. kNI b - cc Definitions of all loads are given in EN 231 1. c25 - 2,5 Page 6 prEN 2287: 2002 Number of this standard Code for diameter d (see table 1) 4 Designation EXAMPLE: Technology code A Technology Bonded fabric liner Technology code (see table 3) I B Without code NOT
39、E 1 The number of characters is constant, Zero (O) is inserted to the left of the figure when the diameter d or length I is less than 1 O. NOTE 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 stand
40、ard shall be accepted without technology code. Injection moulded liner Both technologies can be used at users convenience Table 3 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 tech
41、nology used by the manufacturer shall be stated within the identity block. Marking 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
42、Technical specification According to EN 231 1. Page 7 prEN 2287: 2002 7 Design recommendation Bushes defined by this standard are intended to be installed by interference fit methods (see figure 2). Therefore, the loads given in table 2 can only be ensured if the following mounting is applied. 3 1 S
43、haft 2 Bush 3 Housing a Housing diameter D H7 Shaft diameter d f Figure 2 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 se
44、lecting 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. b
