1、BRITISH STANDARD BS EN 2064:1992 Bearings, spherical plainin corrosion resisting steel with self lubricating liner Technicalspecification The European Standard EN2064:1992 has the status of a British StandardBSEN2064:1992 This British Standard, having been prepared under the directionof the Aerospac
2、e Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15August1992 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference ACE/14 Draft for comment91/71314 DC ISBN 0 580 21027 8 Cooperating organizations
3、 The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiserings
4、raad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Ital
5、iano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzer
6、land Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2064:1992 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 2064 3 National annex NA (
7、informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN2064:1992 ii BSI 01-2000 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language v
8、ersion of EN2064:1992, Aerospace series Bearings spherical plain in corrosion resisting steel with self lubricating liner Technical specification, published by the European Committee for Standardization (CEN). EN2064 was produced as a result of international discussions in which the United Kingdom t
9、ook an active part. A British Standard 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
10、 document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to14, 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 fron
11、t cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2064 May 1992 UDC 629.7.02:621.822.74 + 84:658.56 Descriptors: Aircraft industry, ball joints, corrosion resistant steels, linings, selflubrication parts, specifications, characteristics, inspection, tests English version Aerospace series
12、Bearings spherical plain in corrosion resisting steel with self lubricating liner Technical specification Srie arospatiale Rotules en acier rsistant la corrosion garniture autolubrifiante Spcificationtechnique Luft- und Raumfahrt Gelenklager aus nictrostendem Stahl mit selbstschmierender Beschictung
13、 Technische Spezifikation This European Standard was approved by CEN on1992-05-11. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and
14、 bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibil
15、ity of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Port
16、ugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN2064:1992 EEN2064:1992 BSI 01-2000
17、2 Foreword This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval of the National Associations and the Offici
18、al Services of the member countries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherla
19、nds, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Field of application 3 3 Normative references 3 4 Definitions and symbols 3 5 Materials 3 6 Required characteristics 4 7 Inspections and tests 6 8 Qualification conditions 6 9 Acceptance condit
20、ions 10 10 Marking, packing and certificate of conformity 11 Annex A (normative) Fluids Main characteristics 12 Annex B (normative) Table of inspections and tests to be performed in respect of qualification of bearings with self lubricated liners defined in Standard EN2022 and EN2023 13 Annex C (nor
21、mative) Table of tests and inspections to be performed in respect of thequalification of individual bearings with selflubricating liners 14 Figure 1 7 Figure 2 8 Figure 3 9 Figure 4 10 Table 1 4 Table 2 5 Table 3 5EN2064:1992 BSI 01-2000 3 1 Scope This standard specifies the required characteristics
22、, inspections and tests, qualification, acceptance and delivery conditions for bearings with self lubricating liners, designed to be subjected under load to slow rotations and oscillations only. 2 Field of application These bearings are intended to be used between fixed and moving components of the
23、aircraft structure, such as control surfaces, flaps, doors etc. and their control mechanisms. They are designed to be used in the temperature range of55 C to+150 C. The requirements of this standard may also be applied to other bearings, not listed in clause3, provided that they are conditions of pr
24、ocurement of such bearings. 3 Normative references EN 2022, Aerospace series Bearings, spherical plain, in corrosion resisting steel with self lubricating liner Light series Dimensions and loads. EN 2023, Aerospace series Bearings, spherical plain, in corrosion resisting steel with self lubricating
25、liner Normal series Dimensions and loads. EN 2501, Aerospace series Bearings, spherical plain, in corrosion resisting steel with self lubricating liner and wide inner ring Dimensions and loads. 4 Definitions and symbols 4.1 Definitions 4.1.1 description bearings with self lubricating liners are comp
26、osed of two concentric rings in corrosion resisting steel, between which there is a self lubricating liner bonded to the spherical surface of the outer ring the inner ring is wider than the outer ring which permits a rocking movement, in addition to rotation the outer ring does not contain any engag
27、ement slot this outer ring may be provided with swaging grooves for direct fitting to the structure 4.1.2 loads Permissible static loads The permissible static toad is the maximum permissible load (without safety factor), which can be applied statically. It is defined as a unit pressure multiplied b
28、y the effective projected area (radial or axial), for deformations that are compatible with correct operational behaviour. Permissible static radial load C s The permissible static radial load corresponds to a unit pressure of410MPa. Permissible static axial load C a The permissible static axial loa
29、d corresponds to a unit pressure of205MPa. Ultimate static load The ultimate static radial or axial load is1,5times the value of the permissible static loads and is defined as being the highest load the bearing can support, without failure occurring. Permissible dynamic radial load C 25 The permissi
30、ble dynamic radial load C 25is the load that a bearing can withstand, when subjected to an oscillation of 25 (total amplitude50 ) for25000 cycles, at the rate of10 cycles per minute, without the wear of the self lubricating liner exceeding the value specified in6.4.6. 4.1.3 starting torque the start
31、ing torque at zero load is the maximum torque recorded, when the inner ring starts to revolve, whilst the outer ring is stationary 4.2 Symbols 5 Materials The prescribed materials are specified in the dimensional standards. It is equal to: C s = permissible static radial load C a = permissible stati
32、c axial load C 25 = permissible dynamic radial load at 25 000 cycles C 2,5 -EN2064:1992 4 BSI 01-2000 6 Required characteristics 6.1 Dimensions, tolerances and mass These shall comply with the values specified in the dimensional standards, see7.2. 6.2 Chemical characteristics of the material The che
33、mical composition of the materials shall comply with the specifications listed in the dimensional standards, see7.3. 6.3 Physical characteristics 6.3.1 Physical appearance 6.3.1.1 Bearing Bearings shall be free from scoring, cracks, splits, burrs and any other defects likely to impair their characte
34、ristics and their endurances, see7.1.1. 6.3.1.2 Self lubricating liner The liner shall be free from all traces of contaminating products and shall not show signs of any tearing or stripped portions, see7.1.2. 6.3.2 Hardness Inner ring: 55 u HRC u 62. Outer ring: 23 u HRC u 35. See7.4.1. 6.3.3 Surfac
35、e roughness Outer diameter of inner ring: R a : 0,2m Bore and faces of inner ring, outer diameter of outer ring: R a : 0,8m Other surfaces: R a : 3,2m See7.4.2. 6.3.4 Lubrication No lubrication is permitted. 6.3.5 Compatibility with fluids The bearing shall retain its integrity in the presence of th
36、e following fluids: See7.4.3 andAnnex A. 6.3.6 Static performance at low temperatures The starting torque of the bearings shall be equal to or less than twice those recorded at ambient temperature (20 C) and specified in the dimensional standards, when they are exposed to a temperature of (55 2) C i
37、n the test conditions specified in7.4.4. 6.3.7 Resistance to thermal shock The starting torques of the bearings shall lie within the ranges specified inTable 1 when the bearings are subjected to the extreme alternations of temperature of55 C and+150 C in the test conditions specified in7.4.5. Table
38、1 6.3.8 Bond integrity The condition of the liner edge shall comply with the requirements specified in the dimensional standards. The liner shall not contain any contaminating substances. It shall adhere tightly to the metallic substrate over at least90% of the contact area. No void shall be allowed
39、 which cannot be circumscribed within a circle with a diameter equal to25% of the ring width or6mm, whichever is the smallest, see7.4.3.2 and7.5.6.4. 6.4 Mechanical characteristics See7.5. 6.4.1 Behaviour during rotation and rocking Bearings shall be capable of normal functioning within the temperat
40、ure range prescribed. They shall not reveal any friction points when revolving or rocking, within the limits of the angle specified in the dimensional standards, see7.5.1. 6.4.2 Permissible static radial loads C s The permissible static radial loads C sare specified in the dimensional standards. The
41、se shall be maintained in the test conditions defined in7.5.2, without any higher deformations occurring than indicated inTable 2, in respect of the maximum total deformations, and inTable 3, in respect of the maximum residual deformations. aircraft engine fuel; de-icing fluid (denatured isopropyl a
42、lcohol); hydraulic fluids: mineral based; phosphate ester; synthetic sea-water. Torques specified in EN 2022 and EN 2023 Permissible torques checked after thermal shock tests a (N.m) (N.m) 0,08 to 0,50 0,048 to 0,50 0,12 to 0,80 0,072 to 0,80 0,25 to 1,00 0,150 to 1,00 0,40 to 2,00 0,240 to 2,00 0,6
43、0 to 3,50 0.360 to 3,50 a Calculated values based on60% of the minimum values prior to testing.EN2064:1992 BSI 01-2000 5 Table 2 Table 3 6.4.3 Ultimate static radial loads The ultimate static radial loads shall be1,5 times the permissible static loads C sspecified in the dimensional standards. There
44、 shall be no evidence of any crack, split portion or separation of the constituent components having occurred after these loads have been applied in the test conditions specified in7.5.3. 6.4.4 Permissible static axial loads C a The permissible static axial loads C aare specified in the dimensional
45、standards. They shall be maintained in the test conditions specified in7.5.4, without giving rise to any residual deformations in excess of those specified inTable 3. 6.4.5 Ultimate static axial loads The ultimate static axial loads are1,5 times the permissible static axial loads C aquoted in the di
46、mensional standards. There shall be no evidence of any crack, split portion or separation of the constituent components having occurred after these loads have been applied in the test conditions specified in7.5.5. 6.4.6 Permissible dynamic radial loads The permissible dynamic radial loads correspond
47、 to loads of: Dimensions in millimetres Nominal bore d 10 10 to 12 15 to 17 20 to 25 30 to 40 45 to 50 Max. total deformation 0,25 0,37 0,43 0,50 0,75 1 Dimensions in millimetres Nominal bore d Maximum residual deformation a Light series subjected to Normal series, narrow subjected to Normal series,
48、 wide subjected to C s C a C s C a C s C a 5 0,08 0,10 6 0,08 0,10 8 10 0,08 0,10 12 0,08 0,10 15 17 20 0,09 0,10 22 0,10 0,10 25 0,11 0,11 0,12 0,12 0,14 0,14 30 0,12 0,12 0,14 0,14 0,16 0,16 35 0,14 0,14 0,17 0,17 40 0,16 0,16 0,18 0,18 45 0,18 0,18 0,20 0,20 50 0,20 0,20 0,22 0,22 a The maximum r
49、esidual deformations in excess of0,08mm, when subjected to permissible static radial loads C s , and in excess of0,10mm when subjected to permissible static axial loads C a , have been based on0,3% of the spherical diameter of the inner ring. C 2,5 -EN2064:1992 6 BSI 01-2000 When these loads have been applied in the test conditions specified in7.5.6, the bearings shall satisfy the following requirements: a wear
