EN 12082:2007+A1:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Ohišja ležajev kolesnih dvojic - Preskus delovanjaBahnanwendungen - Radsatzlager - Prüfung des LeistungsvermögensApplications ferroviaires - Boîtes d'essieux - Essais de performanceRailway applications - Axleboxes - Performance testing45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 12082:2007+A1:2010SIST EN 12082:2008+A1:2011en,fr,de01-maj-2011SIST EN 12082:2008+A1:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12082:2007+A1
October 2010 ICS 45.040 Supersedes EN 12082:2007English Version
Railway applications - Axleboxes - Performance testing
Applications ferroviaires - Boîtes d'essieux - Essais de performance
Bahnanwendungen - Radsatzlager - Prüfung des Leistungsvermögens This European Standard was approved by CEN on 8 November 2007 and includes Amendment 1 approved by CEN on 14 September 2010.
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 bibliographical references concerning such national standards 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 translation under the responsibility of a CEN member into its own language and notified to the CEN 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, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12082:2007+A1:2010: ESIST EN 12082:2008+A1:2011

Rig performance test . 13A.1Schematic example of test rig . 13A.2Temperature measurement . 14A.3Grease sampling zones . 17A.4Definition of loading . 18A.5Definition of test cycles . 19A.6Graphical presentation of test cycles . 21A.7Temperature criteria . 22A.8Mechanical and physico-chemical acceptance criteria . 23A.9Watertightness test. 23Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)"""" . 26 !!!!deleted text"""" Bibliography . 30 SIST EN 12082:2008+A1:2011

1) The systems used should offer equivalence with EN ISO 9001. SIST EN 12082:2008+A1:2011

2) 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. SIST EN 12082:2008+A1:2011

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) SIST EN 12082:2008+A1:2011

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. The cumulative test distance (in kilometres), as well as the time at the nominal test speed during each cycle (in minutes), depends on the operating conditions in line traffic of the vehicles to be equipped with these axleboxes. The conditions defined in A.5 and A.6 are intended for main line vehicles, for other applications, the test parameters shall be in accordance with Clause 4. 6.4 Acceptance criteria 6.4.1 Results obtained during the test Throughout the test, no defect in lubrication shall occur as evidenced by unsatisfactory temperature. Likewise, there shall be no bearing defects (spalling, breakage etc.) or seal failures. SIST EN 12082:2008+A1:2011

(2) where 20zT is a temperature measured at a position z and then re-calculated to a temperature corresponding
to an ambient temperature of 20 °C; mzT
is a temperature measured at a position z (measured positions are loading zones and hot box detector zone); aT
is the ambient tempera
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