1、A. E.C.M.A. STANDARD NORM E A. E. C. M.A. A.E.C.M.A. NORM Edition approved for publication prEN 3280 Issue P 1 April 1989 Comments should be sent within six months CI Chairman after the date of publication decision DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boufevard
2、Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : 629.7.02 : 621.822.74+84 : 658.56 Key words : Aeronautical industry, airframe rolling bearings, specification ENGLISH VERSION Aerospace series Bearings, airframe rolling rigid or self-aligning Technical specification Srie arospatiale Roulements pour s
3、tructures daronefs rigides ou rotule Spcification technique Luft- und Raumfahrt Flugwerklager Rillenkugellager oder Pendelkugellager Technische Lieferbedingungen This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel
4、 Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approved by the experts of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to
5、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 will be submitted as a draft Euro
6、pean Standard to CEN (European Committee for Standardization) for final vote. A.E.C.M.A. Mr MOUTARDE I 88, Bd. Malesherbes 25th April 1989 75008 PARIS - FRANCE aecma 1989 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleN
7、o reproduction or networking permitted without license from IHS-,-,- _- - - AECMA PREN3280 89 W 3032333 0005388 3 W prEN 3280 Page 2 Contents 1 2 References 3 kflnltions 4 Required characteristics, inspections and test methods 5 Quality assurance 6 Acceptance cond it ions 7 Packaglng 8 Certificate o
8、f conformity Scope and f leld of appi lcation Annexe A Retention test for self-aligning bearing seals and shields Annexe B Sand and dust test Annexe C Temperature test Annexe D Verification of running accuracy Annexe E Verification of internal clearances Annexe F Verification of permisslble and ulti
9、mate static loads Annexe G Lubricants for airframe rol ling bearings - essential charac- terlstics. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AEC
10、MA PREN3280 87 H 3032333 0005387 5 H I - _ - prEN 3280 Page 3 1 Scope and fleld of appllcatlon Thls Standard speclf les the requlred characterlsttcs, lnspctlons and tests, qual iiy assurance, and conditlons for quallflcatlon, acceptance and dellvery of the alrfrme rolllng bearlngs deslgned to wlthst
11、and (under loadi small oscll Iatfons and slow rotatlons on I y. Thfs Standard applies to al I alrfrme rolling bearlngs when referred to In the respedlve product standards or In a design speciflcatlon. 2 References IS0 1132 EN 2000 EN 3045 EN 3046 EN 3047 EN 3053 EN 3054 EN 3055 EN 3056 EN 3057 EN 30
12、58 EN 3281 EN 3282 EN 3283 EN 3284 EN 3285 EN 3286 EN 3287 EN 3288 Rol I lng bearlngc, tolerances, def Initlons, bl I tngual edltlon. Aerospace serles - Quallty assurance requirements for the manufacture and suppty of EN aerospace standard products11) Aerospace serles - Bearings alrfrane rol Ilng rl
13、gid slngle-row bal 1 bearlngs In steel, dlameter serles O and 2, reduced clearance category-Dlmenslons and loads .2) Aerospace serles - Bearlngs alrfrme rolllng rlgld slngle-row ball bearlngc In steel, cadmlum plated dlameter serles O and 2, reduced clearance category -.Dlmenslons and loads 2) Aeros
14、pace serles - Bearings airfrme rol Ilng rigld sfngle-row bal I bearlngs In corroslon resistlng steel dlmeter serles O and 2 reduced clearance category .- Dlmenslons and loads 2) Aerospace serles - Bearings alrframe rolllng single-row bal I self-allgnlng . rol ler bearlngs In steel- Dimensions and lo
15、ads 2) Aerospace serles - Bearlngc alrfrme rol Ilng slngle-row self-al Ignlng rol ler bearlngs In steel cadmlurn plated-Dlmenslons and loads 2) Aerospace series - Bearings alrfrwne rol Ilng slngle-row self-al lgnlng rol ler bearings In corroslon reslstlng steel- Dlmenslons and loads 2) Aerospace ser
16、les - Bearlngs alrfrm rolllng rlgid two-row ball bearlngs In steel? Dlmenslons and loads 2) Aerospace serles - Bearlngs alrfrane rol Ilng rlgid tw - A given bearing : will be deemed to be acquired if the qualification has been obtained, after testing and inspection, for the bearing immediately befor
17、e and the one immediately after the bearing in question, within the range of bearings indicated in the product standard. the fol lowlng: For a given serles of bearings to be qualified, the manufacturer shall provfde a sample of - 9 bearings If thls is the first qualification series. - 7 bearlngs for
18、 all the other quaiiflcatlon serles. 6 Acceptance conditlons 6.1 The manufacturers respons ib i I ity see EN2000 6.2 Inspections and tests to be carried out by the manufacturer The acceptance of a del ivery batch of bearlngs chal I be in accordance wlth Table 4 except that the sample plan may be var
19、ied with the approvai of the customer or authority respons ib le for acceptance. 6.3 Customer qual ity control The customer may, on acceptance of a delivery batch, proceed to inspect it by usfng the inspections speclfied in Table 4, in fut 1 or in part, to ensure that the itens conform to the requir
20、ed quality levei, and to determine whether the consignment is acceptable. Thls Inspection can be carrled ait in the customers factory, or, by speclai agreement, in the manufacturers factory. 1 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license wit
21、h AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-7 Packaglng The bearings shall be packaged elther individual damaged during transportatlon. They shal I be protected against ioisture, corros The packaging material in contact with grease-resistant. The fol low
22、lng indications shal I be aff - Manufacturers name and address y or in rolls so that they will not be on, dirt and other harmful substances. provide this protection and be the bearing shal i xed to each lndiv dua 1 package: - Quantity (for rolls) - - Packaglng date - Lubrication date. The fol lowlng
23、 Indications at least must appear on col lectlve packaglng: - Manufacturers name and address - Number of contract or order - Quantlty, 1.8. number of Items contained in each unit or intermediate package - Identity block as defined by product standards Identity block as defined by the products standa
24、rds 8 Certificate of conformity AI I the bearings suppl led In accordance wlth thls Standard shal I be accanpanled by a certlficate of conformity from the manufacturer. a Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleN
25、o reproduction or networking permitted without license from IHS-,-,- I jAECMA PREN3280 87 3012332 0005396 2 W prEN 3280 Page 10 Table 2: Non-destructive fnspections and tests to be carried out for qualificatfon 1) The order of the inspectlons and tests is left to the lnltlatfve of the qualiftcatlon
26、authority. Table 3: Destructive nspectlons and tests to be carrled out for qual lflcatfon ueT I ne in 2 I Types of Inspect lons and tech 1 ) I Hardness 2) 4.6 Surface roughness 4.7 Lubrication 4.9 Sand and dust test 3) 4.10.2 4.10.2 Runn f ng behaviour and behav lour of bear f ngs, seal s and shield
27、s at extreme temperatures 3) 4.10.3 4.13.2 I I l permlslb le (CS) 4.15 radfal: u I tlmate 4.16 Test under statlc load I l permlsslble (Fa rnax.) 4.15 I I axial: u It lmate 4.16 1) The order of the lnspectlons and tests 1s left to the inltlative of the qualificatfon authority. 2) A mfnfrnum of 3 rol
28、ling elements shal I be lnspeded. 3) These tests shal I be carrled out only on the first nanlnal sfze of each wpe of bearfng submitted for qual If fcatlon (see 5.2). Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo rep
29、roduction or networking permitted without license from IHS-,-,-AECMA PREN3280 89 301-1?333 0005397 4 = prEN 3280 Page 11 Table 4 : Inspections and tests to be carried out for acceptance DefIrr Sampling plan 2) Types of inspections and tests 1) ed in Materials 4.1 Certificate of materials 5 manufactu
30、rer Dimensions and tolerances 4.2 10 % Mark1 ng 4.4 100 % Surface appearance 4.5 lo: unassembled Hardness 4.6 1% per heat treatment 1 0% : assemb I ed batch, with minfmum of 1 Item Surface roughness 4.7 5 % Surface treatment 4.8 5% per cadmiurtrpiated batch Lubr Icat ion 4.9 100 % 4.10.2 Retention o
31、f seals and shields 4.10.1 5 % Running accuracy (K, Kea, sla, sea) I 4.11 I 10 % Internal clearances (Gr, Ga, Gd) I 4.12 I 5 % Running behavlour at ambient temperature 4.13.1 100 % Starttng torques at zero load 4.14 5 % 1) The order of the inspections and tests is left to the inftiattve of the accep
32、tance 2) For the manufacturer, when the sampling 1s not lo, any defect found in the course authortty. These Inspections can be carried out at the time of manufacture. of an inspectlon or test requlres thls inspection to be extended to 100%. Copyright Association Europeene des Constructeurs de Materi
33、el Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3280 Page 12 Annexe A Retentlon test for self-allgnlng bearlng seals and shlelds Al Prlnclple See f fgure 1 A2 Method Apply a force to the end of a shaft Ins
34、erted Into the bore of the bearlng to be tested. This force chal I produce the mlnlmum torque specIfIed In Table 5. The test shall be carrled out at amblent temperature, In two dlredlons 90 frcm each other. lever arm 8earIng holdlng part ! 30 ANNEXE O (cont i nued) Measuring loads “F“ max. N 6 7.5 C
35、opyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN3280 47 LOl1232L OOO52O3 -b -mp I _. prEN 3290 age 17 ANNEXE E Verlf Icatlon of Internal clear
36、ances Nominal dlameter d mm El Radlal Internal clearance (G,) Loads “F“ (in NI to be appl led for bearlngs: tN5 u43 t 0 5041 tN5 U35 t o 5033 tN5Z1 tNJZ84 to 3283 to 3292 El. 1 Prfnclple See Flgure 4. 49 8 El. 2 Method To measwe the total radlal dlsplacement under an alternatlng load “F“, of one rln
37、g of a bearlng In relatlon to the other rlng, whlch Is held stattonary: - Mount the bearlng vertlcally - Place a dlal gauge ln the radlal plane of the bearlng, - Apply the load deflned In Table 7, In the dlrectlon of the dlal gauge and - Repeat thls measurement In varlous angular posltlons by rotatl
38、ng one rlng then ln the cpposlte dlrectlon, In relatlon to the other. 25 25 50 I I ! ! I Flgure 4 ! I Base Table 7 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license f
39、rom IHS-,-,-AECMApPRE-N3-B0 A = L0123LL 0005204 A prSN 3280 =age 19 Annexe E (continued) E2 AxIal Internal clearance (Ga) E2.1 Pr IncIpIe See Flgure 5 E2r2 Method To measure the total axlal displacement under an alternatlng load F, of one rlng of a bearlng In relatlon to the other rlng, which Is hel
40、d stattonary: - Mount the bearlng vertlcal ly, - Place a dlal gauge In the axIs of the bearlng, - Apply the load deflned In Table 8, In the dlrectlon of the dlal gauge, - Repeat this measurement In dlfferent angular posltlons by rotatlng one and then ln the opposlte dlrectfon, rlng in relatlon to th
41、e other. , I 1 I F Flgure 5 Tabie 8 Nom i na I d i meter Loaa kir t I n NI to De appi iea tor bearings: d m EN3045 EN3053 EN3281 EN3284 to 3292 to 3047 to 3055 to 3283 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo r
42、eproduction or networking permitted without license from IHS-,-,-AECMA PREN3280 87 W L0123LJ 0005205 T mi Nom 1 na I 61 ameter d m AI I dlameters prM 3280 =age 13 Load “F1* (ln N) to be appl led for bearlngs: EN3056 to 3058 10 Annexe E (conttnued) E3 Dlagonal internal clearance (Gd) E3.1 Prlnclple S
43、ee Flgure 6 U.2 Method To measure the total cant, under an alternatlve load lfF1l, of the Inner rlng of a bearlng In relatlon to the outer rlng, whlch 1s held statlonary: - Mount the bearlng horizontal ly, - Mount a pln fltted wlthout stresses, ln the bore of the bearlng, and exceedlng the centre of
44、 the bearlng by an equal dfstance on elther slde, - Place a dlal gauge on thls pln, 100 mm fran the centre of the bearlng, - Gradually apply the load deflned In Table 9, 100 mm frcm the centre of the bearlng, on the slde opposlte the dlal gauge, In the same dlrectlon as the dlal gauge and then In th
45、e opposlte dfrectlon, - Repeat thls measurement In dlfferent angular posltlons by rotatlng one rlng In relation to the other. I Dlal gauge In pm -.- I Flgure Table 9 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo rep
46、roduction or networking permitted without license from IHS-,-,-,AECMA-PREN32AO B 1012311 0005206 L i prEN 3280 Page 20 Annexe F Verfficatlon of permissible and ultimate static loads F1 Permissible radial static loads (CS) F1.l Princlple See Figures 7 and 8 F1.2 Method - Mount the bearing as shown in
47、 Figure 7 (ft shal I be able to turn freely by hand), - Apply load Cs for 1 minute, - Remove the load, - Transfer and mount the bearing as shown in Figure 8, - Apply a rdial load of 25N (F) - Turn the bearing manual ly, - Check its running behaviour. F2 Ultimate radial static loads This test follows
48、 that specified In F1. F2.1 Principle See Figure 7 F2.2 Method - Mount the bearing as shown in Figure 7 (it shal I be able to turn freely by hand), - Apply a radial load of 1.5 Cs for 1 minute, - Remove the load, - Check the bearing. F3 Permissible axial static loads (Fa max.) F3.1 Principle See Figures 9 and 10 F3.2 Method - Mount the bearing as shown in Figure 9, - Apply the load Fa max. for 1 minute - Remove the load, - Transfer and mount the bearing as shown in Figure 10, - Apply an axial load of 25 N (FI, - Rotate the bearing manually, - Check its running behaviour. F4 Ult
