1、September 2015 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).
2、ICS 45.040!%F0#“2351300www.din.deDDIN EN 16451Railway applications Braking Brake pad holder;English version EN 16451:2015,English translation of DIN EN 16451:2015-09Bahnanwendungen Bremse Bremsbelaghalter;Englische Fassung EN 16451:2015,Englische bersetzung von DIN EN 16451:2015-09Applications ferro
3、viaires Freinage Porte-garnitures;Version anglaise EN 16451:2015,Traduction anglaise de DIN EN 16451:2015-09www.beuth.deDocument comprises 2 pagesIn case of doubt, the German-language original shall be considered authoritative.808.15DIN EN 16451:2015-09 2 A comma is used as the decimal marker. Natio
4、nal foreword This document (EN 16451:2015) has been prepared by Technical Committee CEN/TC 256 “Railway applications” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Fahrweg und Schienenfahrzeuge (DIN Standards Committee Railway), Work
5、ing Committee NA 087-00-03 AA Bremse. This standard is based on the English reference version. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16451 June 2015 ICS 45.040 English Version Railway applications - Braking - Brake pad holder Applications ferroviaires - Freinage - Porte-garnitures Bah
6、nanwendungen - Bremse - Bremsbelaghalter This European Standard was approved by CEN on 13 May 2015. 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-
7、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 language made by transl
8、ation 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, Estonia, Finland
9、, Former Yugoslav Republic of Macedonia, 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
10、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16451:2015 EEN 16451:2015 (E) 2 Contents Page Forew
11、ord 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .7 4 Symbols and abbreviations 7 5 Design and manufacture .7 5.1 Latch mechanism.7 5.2 Interchangeability by applying same main dimensions and geometry .7 5.2.1 General 7 5.2.2 Interchangeability for “conventional” brak
12、e unit .8 5.2.3 Interchangeability for “compact” brake unit 8 5.2.4 Dimensional conformity 8 5.3 Material .8 5.4 Environmental conditions .8 5.4.1 Ambient temperature .8 5.4.2 Other environmental conditions 8 5.5 Loading in the direction of force application 9 5.6 Loading in the direction of the bra
13、king moment (tangential force) 9 5.7 Vibrations and shocks . 10 5.7.1 New designs 10 5.7.2 Existing designs . 10 6 Type test methods 10 6.1 Sampling for type test 10 6.2 Test requirements . 11 6.3 Test procedure 11 6.3.1 Interchangeability by applying same main dimensions and geometry 11 6.3.2 Mater
14、ial 11 6.3.3 Salt spray test . 11 6.3.4 Loading in the direction of force application . 12 6.3.5 Loading in the direction of the braking moment (tangential force) . 13 6.3.6 Vibrations and shocks . 14 7 In-service assessment . 17 8 Designation . 17 9 Identification and marking . 17 Annex A (informat
15、ive) Interchangeability for “conventional” brake unit . 18 Annex B (informative) Interchangeability for “compact” brake unit . 20 Annex C (informative) Device with mechanical coding 22 Annex D (informative) Geometry of standard brake pads 23 D.1 General . 23 D.2 Space envelope for 1/2 brake pad of 2
16、00 cm2“standard form A” . 23 D.3 Space envelope for 1/2 brake pad of 200 cm2“standard form B” . 24 D.4 Space envelope for 1/2 brake pad of 175 cm2“standard form” . 24 DIN EN 16451:2015-09 EN 16451:2015 (E) 3 D.5 Interchangeability of dovetail for 1/2 brake pad of 175 cm2and 200 cm225 Annex E (inform
17、ative) In-service assessment 26 E.1 General . 26 E.2 Test set-up and sampling . 26 E.3 Procedure . 26 E.4 Pass/fail criteria . 26 DIN EN 16451:2015-09 EN 16451:2015 (E) 4 Foreword This document (EN 16451:2015) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretaria
18、t of which is held by DIN. 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 December 2015, and conflicting national standards shall be withdrawn at the latest by December 2015. Attention is drawn t
19、o 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 rights. This document has been prepared under a mandate given to CEN by the European Commission and the European F
20、ree Trade Association. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of
21、 Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16451:2015-09 EN 16451:2015 (E) 5 Introduction This Europ
22、ean Standard gives the requirements to be met for the design, dimensioning, testing and quality assessment of brake pad holders. These requirements cannot be written in sufficient detail to ensure good workmanship or proper construction. Each manufacturer is therefore responsible for taking every ne
23、cessary step to make sure, that the quality of workmanship and construction is such as to ensure accordance with good engineering practice. DIN EN 16451:2015-09 EN 16451:2015 (E) 6 1 Scope The requirements contained in this European Standard apply to the brake pad holders with which the rail vehicle
24、s of main-line railways, regional and suburban railways are fitted. Brake pad holders pursuant to this standard are to be made from ferrous materials e.g. cast iron, cast steel or forged steel. Brake pad holders made of non-ferrous materials are not subject of this standard. 2 Normative references T
25、he 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 document (including any amendments) applies. EN 10204
26、, Metallic products - Types of inspection documents EN 10328, Iron and steel - Determination of the conventional depth of hardening after surface heating EN 14478, Railway applications - Braking - Generic vocabulary EN 22768-1, General tolerances - Part 1: Tolerances for linear and angular dimension
27、s without individual tolerance indications (ISO 2768-1) EN 50125-1, Railway applications Environmental conditions for equipment Part 1: Rolling stock and on-board equipment EN 60068-2-6, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) (IEC 60068-2-6) EN 60068-2-47, Environm
28、ental testing - Part 2-47: Tests - Mounting of specimens for vibration, impact and similar dynamic tests (IEC 60068-2-47) EN 60721-3-5:1997, Classification of environmental conditions - Part 3: Classification of groups of environmental parameters and their severities - Section 5: Ground vehicle inst
29、allations (IEC 60721-3-5:1997) EN 61373, Railway applications Rolling stock equipment Shock and vibration tests (IEC 61373) EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1) EN ISO 6507-1, Metallic materials - Vickers hardness test - Part 1: Test method (IS
30、O 6507-1) EN ISO 6508-1, Metallic materials - Rockwell hardness test - Part 1: Test method (ISO 6508-1) EN ISO 6892-1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1) EN ISO 9227, Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227) E
31、N ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition (ISO 14284) EN ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method (ISO 148-1) DIN EN 16451:2015-09 EN 16451:2015 (E) 7 3 Terms and definitions For the purpos
32、es of this document, the terms and definitions given in EN 14478 and the following apply. 3.1 compact disc brake unit disc brake unit, generally with reduced envelope and weight with a single interface to the bogie 3.2 operational mounting condition normal and nominal conditions of assembly on a veh
33、icle 3.3 referenced technical drawings drawings used for definition of brake pad holder 4 Symbols and abbreviations A% Percentage elongation after fracture (as specified by EN ISO 6892-1) F Force g Gravity acceleration 9,81 m/s2KV Absorbed energy for a V-notch test piece (as specified by EN ISO 148-
34、1) KU Absorbed energy for a U-notch test piece (as specified by EN ISO 148-1) SL1 and SL2 Classes of loading T1 and TX Classes of temperature as specified by EN 501251 VL and VH Classes of vibration 5 Design and manufacture 5.1 Latch mechanism The design of the latch mechanism to retain the brake pa
35、ds shall satisfy the following principle: there shall be a positive retention (generation of strain to obtain unlocking) of the latch when in the closed position; no single point failure of the latch mechanism and its attachment to the pad holder shall result in a loss of brake pads; ease of operati
36、on no special tools to open and close the latch mechanism. Preferably designed to allow use of simple flat bladed screw driver; during pad renewal the latch mechanism should remain attached to the brake pad holder; renewal of a defective latch mechanism should not require the dismantling of the brak
37、e pad holder from the brake unit. 5.2 Interchangeability by applying same main dimensions and geometry 5.2.1 General Brake pad holders can be designed based on different concepts. The requirements specially for interchangeability are defined below. DIN EN 16451:2015-09 EN 16451:2015 (E) 8 5.2.2 Inte
38、rchangeability for “conventional” brake unit The requirements for the dimensions for geometric interchangeability for “conventional” brake unit are given in Annex A. These dimensions are compatible with brake pads defined in Annex D. If required a device with mechanical coding should be used. Annex
39、C indicates an example for application. 5.2.3 Interchangeability for “compact” brake unit The requirements for the dimensions for geometric interchangeability for “compact” brake unit are given in Annex B. These dimensions are compatible with brake pads defined in Annex D. If required a device with
40、mechanical coding should be used. Annex C indicates an example for application. 5.2.4 Dimensional conformity The dimensional requirements are defined in referenced technical drawings. The conformity assessment of the dimensions of the brake pad holder is verified in accordance with 6.3.1. 5.3 Materi
41、al As specified in the scope, this standard applies only to the brake pad holders in “ferrous material” e.g. cast iron or steel, manufactured by a forging or casting process. The material used for the design of the brake pad holder shall conform to the technical requirements defined in this document
42、. The conformity assessment of the brake pad holder material, with referenced technical drawings, shall be verified in accordance with 6.3.2. 5.4 Environmental conditions 5.4.1 Ambient temperature The brake pad holder shall be able to operate within the temperature classes T1 and TX as specified by
43、EN 50125-1, where the upper limit for TX is +70 C external air temperature. 5.4.2 Other environmental conditions 5.4.2.1 General The following environmental conditions shall be considered in the design of the brake pad holder. If not specifically required to be tested as part of the type testing req
44、uirements in this standard, suitable tests and/or design assessments considering the effect of the following environmental conditions on the brake pad holder shall be used in the development/design proving of the device, prior to type testing. 5.4.2.2 Humidity The following external humidity levels
45、shall be considered: yearly average: 75 % relative humidity; on 30 days in the year continuously: between 75 % and 95 % relative humidity; on the other days occasionally: between 95 % and 100 % relative humidity; maximum absolute humidity: 30 g/m3occurring in tunnels. DIN EN 16451:2015-09 EN 16451:2
46、015 (E) 9 5.4.2.3 Rain Rain rate of 6 mm/min shall be taken into account. The effect of rain shall be considered depending on the possible equipment installation together with wind and vehicle movement. 5.4.2.4 Snow, ice and hail Consideration shall be given to the effect of all kinds of snow, ice a
47、nd hail. The maximum diameter of hailstones shall be taken as 15 mm, larger diameter can occur exceptionally. The effect of snow, ice and hail shall be considered depending on the equipment installation together with wind and vehicle movement. 5.4.2.5 Solar radiation Equipment design shall allow for
48、 direct exposure to solar radiation at the rate of 1 120 W/m2for a maximum duration of 8 h. 5.4.2.6 Resistance to pollution The effects of pollution shall be considered in the design of equipment and components. Means may be provided to reduce pollution by the effective use of protection of the devi
49、ce. The severity of pollution can depend upon the location of the equipment therefore the effects of the kinds of pollution indicated in Table 1 shall be considered as a minimum. Table 1 Pollution Pollution Class to be considered Chemically active substances Class 5C2 of EN 607213-5:1997 Contaminating fluids Class 5F2 (electrical engine) of EN 607213-5:1997 Class 5F3 (thermal engine) of EN 607213-5:1997 Biologically active substances Class 5B2 of EN 607213-5:1997 Dust Class 5S2 of EN 607213-5:1997 Stones and other objects Ballast and o
