EN 12082:2007

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Railway applications - Axleboxes - Performance testingŽelezniške naprave - Ohišja ležajev kolesnih dvojic - Preskus delovanjaApplications ferroviaires - Boîtes d'essieux - Essais de performancesBahnanwendungen - Radsatzlager - Prüfung des LeistungsvermögensTa slovenski standard je istoveten z:EN 12082:2007SIST EN 12082:2008en,fr,de45.040ICS:SIST EN 12082:20011DGRPHãþDSLOVENSKI
STANDARDSIST EN 12082:200801-marec-2008

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12082December 2007ICS 45.040Supersedes EN 12082:1998
English VersionRailway applications - Axleboxes - Performance testingApplications ferroviaires - Boîtes d'essieux - Essais deperformancesBahnanwendungen - Radsatzlager - Prüfung desLeistungsvermögensThis European Standard was approved by CEN on 8 November 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12082:2007: E

Rig performance test.13 A.1 Schematic example of test rig.13 A.2 Temperature measurement.14 A.3 Grease sampling zones.17 A.4 Definition of loading.18 A.5 Definition of test cycles.19 A.6 Graphical presentation of test cycles.20 A.7 Temperature criteria.21 A.8 Mechanical and physico-chemical acceptance criteria.22 A.9 Watertightness test.23 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 96/48/EC of the European Parliament and of the Council of 23 July 1996 on the interoperability of the trans-European High-speed rail system, as modified by EU Directive 2004/50/EC of 29 April 2004.25 Annex ZB (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2001/16/EC of the European Parliament and of the Council of 19 March 2001 on the interoperability of the trans-European conventional rail system, as modified by EU Directive 2004/50/EC of 29 April 2004.26 Bibliography.28

1) Official Journal of the European Communities No. L 235 of 17.9.96. 2) Official Journal of the European Communities No. L 110 of 20.4.01. 3) Official Journal of the European Communities No. L 220 of 21.6.04.

4) The systems used should offer equivalence with EN ISO 9001.

5) NF — Association Française de Normalisation (AFNOR), 11 avenue Francis de Pressensé, 93571 La Plaine Saint-Denis Cedex, Tel.: +33 (0) 1 41 62 80 00, Fax: +33 (0) 1 49 17 90 00.

in general, two sensors in the loaded zone of both axleboxes, aligned centrally above the bearing rows with typical positions shown in Figure A.2 for an axlebox with two bearings and in Figure A.3 for an axlebox with one bearing; 2)
in the scanning zone of the hot box detectors (HBD), by a sensor in direct contact with the surface of the body as indicated in Figure A.4 (a non-contacting temperature sensor – measuring in the same zone – shall be used only in case there are no suitable surfaces to attach a sensor); 3)
of the ambient air stream which is directed at the axle boxes, measured at the outlet of the cooling fans. It shall be measured for both axle boxes (see Figure A.1). 6.2.2 Test parameters 6.2.2.1 General The test parameters will be defined on the basis of the operating conditions of the vehicles to be equipped with these axle boxes and documented in accordance with Clause 4. The following test parameters are required, agreed and documented before the test and presented in the test report: a) reference vertical load 0F (the axle load), in newtons; b) wheel diameter at the limit of wear mind, in metres; c) vehicle speed limit maxν, in kilometres per hour; d) pre-test procedure; e) test cycle and cumulative test distance, in kilometres; f) original grease quantity and, if required, re-lubrication interval and grease quantity. If deviations from the test parameters in A.4 and A.6 are agreed in order to simulate special operating conditions, this shall be indicated in the test report. 6.2.2.2 Rotational speed The maximum rotational speed, maintained most of the time during the test, is that of a wheelset on which the wheels are at their limit of wear and where the rotational speed is derived from the vehicle speed limit, increased with a safety margin of 10 %. The resulting rotational speed is the nominal test speed, n, in revolutions per minute. The nominal speed in kilometres per hour is designatednν. minmax6110dvn= (1)

6.2.2.3 Radial and axial forces The external forces are applied to each axlebox inducing forces on the rolling bearings, simulating as closely as possible the distribution of forces from the primary suspension. There shall be a constant radial force and an alternating axial force. Based on the load data specified in accordance with Clause 4, the values of radial and axial forces shall be calculated as defined in A.4 and the cycle of application of the axial load as defined in A.6. The axial force shall not be applied when the test speed is less than 20 % of the nominal test speed. 6.2.2.4 Air cooling An air cooling system shall provide an air speed of 8 m/s to 10 m/s measured close to the axleboxes, with this average value taken from several points across each axlebox in the area impinged by the air stream. This cooling is maintained constant when the test is running, however not during the stops. An air temperature of 20 °C is recommended. 6.3 Carrying out the test 6.3.1 General Unless otherwise agreed and documented in accordance with Clause 4, the test parameters, speeds and forces shall be those in 6.2.2, A.4, A.5 and A.6. 6.3.2 Pre-test Before running the performance test, a pre-test shall be run. The objective of this test is to observe the thermal behaviour of the bearings and to redistribute the grease. The pre-test is illustrated in A.6. It consists of four cycles, each made up of two elementary trips, one in each rotational direction. The speeds are 25 %, 50 %, 75 % and 100 % of the nominal test speed, respectively. The radial force shall be maintained during the test; the axial force is applied as agreed, e.g. 25 %, 50 %, 75 % and 100 % of the calculated nominal axial force. Each elementary trip is made up of a speed increase, a constant speed, a slowing down and a stop. The distance of each elementary trip is not predetermined; when the temperatures have stabilized – at least two hours within a 5 ° range – the trip is completed. 6.3.3 Performance testing The test consists in repeating identical cycles at the nominal test speed to a specified cumulative distance. A cycle consists of two elementary trips, one for each direction of rotation, separated by a short stop and composed of a starting period, a period of constant maximum speed and a slowing down period to stop. The stop period may be prolonged if required.
...