1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 2311:2012Aerospace series Busheswith self-lubricating liner Technical specificationCopyright European Committee for Standardization Provided by IHS under license with CENNo
2、t for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 2311:2012. It supersedes BS EN 2311:1990 which is withdrawn.The UK participation in its preparation was entrusted to
3、Technical Committee ACE/12, Aerospace fasteners and fastening systems.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct appli
4、cation. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 76586 5 ICS 49.030.99 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Co
5、mmittee on 30 April 2012.Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EUROPEAN STANDARD NORME EUR
6、OPENNE EUROPISCHE NORM EN 2311 March 2012 ICS 49.030.99 Supersedes EN 2311:1987English Version Aerospace series - Bushes with self-lubricating liner - Technical specification Srie arospatiale - Bagues avec garniture autolubrifiante -Spcification technique Luft- und Raumfahrt - Buchsen mit selbstschm
7、ierender Beschichtung - Technische Lieferbedingungen This European Standard was approved by CEN on 23 December 2011. 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 an
8、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other langua
9、ge made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark,
10、 Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMA
11、LISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2311:2012: ECopyright European Committee for Standardization Provided by IHS under li
12、cense with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .53.1 Description .53.2 Loads 53.3 Friction torque under load at ambient temperature .63
13、.4 Surface discontinuities .63.5 Adhesion of the liner .73.6 Delivery batch 74 Required characteristics, inspection and test methods 85 Quality assurance . 115.1 Manufacturers approval 115.2 Product qualification 116 Acceptance conditions 116.1 Manufacturers responsibility 116.2 Inspections and test
14、s to be carried out by the manufacturer 116.3 Customer quality control . 117 Packaging 128 Certificate of compliance . 12Annex A (normative) Testing of permissible and ultimate static loads . 15A.1 Permissible radial static loads (Cs) . 15A.2 Ultimate radial static loads 15A.3 Permissible axial stat
15、ic loads (Ca) . 16A.4 Ultimate axial static loads 16Annex B (normative) Testing of permissible radial dynamic loads (C25) 19B.1 Principle . 19B.2 Method . 19Annex C (normative) Fluids Essential characteristics 21C.1 Fuel for turbine aero engine 21C.2 Fluids for de-icing circuit . 21C.3 Hydraulic flu
16、ids . 21C.4 De-icing and anti-icing fluids . 21Annex D (normative) Resistance of the liner to peeling 22D.1 Principle . 22D.2 Method . 22Annex E (normative) (for inch size only) Measurement of friction coefficient for EN 4534-2, EN 4535-2, EN 4536-2 and EN 4537-2 . 23E.1 Principle . 23E.2 Starting t
17、orque under load C25at room temperature 23Annex F (informative) Permissible unit pressure . 25Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 3 Fo
18、reword This document (EN 2311:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associatio
19、ns and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2012, and conflicting national standards sh
20、all be withdrawn at the latest by September 2012. This document supersedes EN 2311:1987. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent right
21、s. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel
22、and, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or net
23、working permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 4 1 Scope This European Standard specifies the required characteristics, inspections and tests, quality assurance and qualification, acceptance and delivery conditions for bushes, designed to be subjected under load, to s
24、low sliding movements, rotations and small oscillations only for aerospace applications. This standard applies to all bushes when referred to in respective product standards or in a design documentation. The liner is designed to be used in the temperature range of 50 C to 163 C. Aluminium bushes are
25、 limited to 55 C to 121 C. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced do
26、cument (including any amendments) applies. EN 2285, Aerospace series Bushes, plain aluminium alloy with self-lubricating liner Dimensions and loads EN 2286, Aerospace series Bushes, flanged aluminium alloy with self-lubricating liner Dimensions and loads EN 2287, Aerospace series Bushes, plain corro
27、sion resisting steel with self-lubricating liner Dimensions and loads EN 2288, Aerospace series Bushes, flanged corrosion resisting steel with self-lubricating liner Dimensions and loads EN 2755, Aerospace series Bearings, spherical plain in corrosion resisting steel with self-lubricating liner Elev
28、ated load at ambient temperature Technical specification EN 4534-2, Aerospace series Bushes, plain in aluminium alloy with self-lubricating liner, elevated load Part 002: Dimensions and loads Inch series EN 4535-2, Aerospace series Bushes, flanged in aluminium alloy with self-lubricating liner, elev
29、ated load Part 002: Dimensions and loads Inch series EN 4536-2, Aerospace series Bushes, plain in corrosion resisting steel with self-lubricating liner, elevated load Part 002: Dimensions and loads Inch series EN 4537-2, Aerospace series - Bushes, flanged, corrosion-resisting steel with self-lubrica
30、ting liner, elevated load - Dimensions and loads - Inch series EN 9100, Quality management systems Requirements for Aviation, Space and Defense Organizations EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN 10204, Metallic products Types of
31、 inspection documents ISO 11078, Aircraft De-icing/anti-icing fluids ISO types II, III and IV Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 5 EN
32、 ISO 8785, Geometrical Product Specification (GPS) Surface imperfections Terms, definitions and parameters (ISO 8785) TR 4475, Aerospace series Bearings and mechanical transmissions for airframe applications Vocabulary1)3 Terms and definitions For the purpose of this standard the terms and definitio
33、ns given in TR 4475 and the following definitions apply. 3.1 Description Bushes with self-lubricating liner are composed of a ring in corrosion resisting steel or aluminium alloy with a self-lubricating liner bonded to the bore. As regards flanged bushes, the self-lubricating material is bonded to t
34、he outer face of the flange as well as the bore. 3.2 Loads 3.2.1 permissible static radial load CSor permissible static axial load Ca(flanged bushes only) the maximum permissible load (without safety factor), which can be applied statically It is defined as a unit pressure multiplied by the effectiv
35、e projected area (radial or axial), for deformations that are compatible with correct operational behaviour. 3.2.2 ultimate static load (radial or axial) 1,5 times the value of the permissible static load and defined as being the highest load the bush will support without failure occurring 3.2.3 per
36、missible dynamic radial load C25the load that a bush can withstand, when subjected to an oscillating movement for 25 000 cycles, at the rate of (12 2) cycles/min 3.2.4 cycle an angular displacement of the shaft in relation to the lined bush of 0 to 25, then of 25 to 25 and finally 25 to 0 1)Publishe
37、d as ASD-STAN Technical Report at the date of publication of this standard by Aerospace and Defence Industries Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org).Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or
38、networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 6 Figure 1 3.3 Friction torque under load at ambient temperature The coefficient of friction is calculated as follows: RCT=25 where is the coefficient of friction; T is the dynamic rotational torque under load, express
39、ed Newtonmeter (Nm); R is the radius of shaft, expressed in metres (m); C25 is the dynamic radial load, expressed in Newton (N); 3.4 Surface discontinuities 3.4.1 crack linear recession with a sharp bottom resulting from a disturbance of the integrity of the surface, and of the parent material of th
40、e workpiece SOURCE: EN ISO 8785 3.4.2 score or scratch surface defect which is a recession of irregular shape and unspecified direction SOURCE: EN ISO 8785 3.4.3 lap tongue-like raising of small thickness, often in the form of a seam, caused by folding over of material and forcing it into the surfac
41、e when rolling, forging etc. SOURCE: EN ISO 8785 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 7 3.4.4 seam non-welded fold which appears as an
42、open defect in the material 3.5 Adhesion of the liner void an area where the adhesive bond is broken or non-existent leaving a smooth and clean area on the metallic surface 3.6 Delivery batch delivery batch consists of bushes bearing the same identity block although they may originate from different
43、 manufacturing batches Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 2311:2012EN 2311:2012 (E) 8 4 Required characteristics, inspection and test methods See Table 1. Tabl
44、e 1 Clause Characteristics Requirements Inspection and test method Q aA a4.1 Materials In accordance with the product standards or design documentation Chemical analysis and physical properties or a certificate of compliance according to EN 10204, 3.1B issued by the semi-finished product manufacture
45、r. X X 4.2 Dimensions and tolerances In accordance with the product standards or design documentation Suitable measuring instruments Measurement of the boreband of the outer diameter Rings having a width of 10 mm: in two planes parallel to the outer faces and placed at a distance from these faces tw
46、ice the maximum chamfer value of these rings. Measurement of widths of rings: A minimum four points check on the width of each ring (distance between the two faces). X X 4.3 Masses In accordance with the product standards or design documentation Suitable methods X 4.4 Marking In accordance with the
47、product standards or design documentation Visual examination X X 4.5 Surface appearance The bushes shall be free of surface discontinuities liable to have a detrimental effect on the characteristics and durability. The liner shall not contain contaminant products and shall not show broken or voided
48、areas. No lubrication allowed. Visual monitoring using appropriate procedures. X X 4.6 Surface roughness Shall conform to product standards Suitable measuring instruments or visual tactile samples. X X 4.7 Static loads: radial: Cs axial: Ca Shall conform to product standards With permissible static loads no maximum total deformations greater than those indicated in
