1、BS EN 15625:2008ICS 45.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRailway applications Braking Automaticvariable load sensingdevices+A1:2010National forewordThis British Standard is the UK implementation of EN 15625:2008+A1:2010. It supersedes BS EN 1
2、5625:2008, which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its prep
3、aration was entrusted to Technical Committee RAE/4, Braking.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 application.Com
4、pliance with a British Standard cannot confer immunity from legal obligations.BS EN 15625:2008+A1:2010This British Standard was published under the authority of the Standards Policy and Strategy Com-mittee on 31 March 2009 BSI 2011Amendments/corrigenda issued since publicationDate Comments 31 Januar
5、y 2011 Implementation of CEN amendment A1:2010ISBN 978 0 580 70064 4EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15625:2008+A1 October 2010 ICS 45.060.01 Supersedes EN 15625:2008English Version Railway applications - Braking - Automatic variable load sensing devices Applications ferroviaires
6、 - Freinage - Dispositifs de pese variable automatiques Bahnanwendungen - Bremse - Automatisch kontinuierlich wirkende Lasterfassungseinrichtungen This European Standard was approved by CEN on 13 September 2008 and includes Amendment 1 approved by CEN on 30 August 2010. CEN members are bound to comp
7、ly 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 Managem
8、ent 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
9、 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
10、, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved wor
11、ldwide for CEN national Members. Ref. No. EN 15625:2008+A1:2010: E2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms, definitions and symbols .53.1 Terms and definitions .53.2 Symbols 64 Design and manufacture .64.1 General 64.2 Functional requirements .74.2.1 Operating requirements
12、74.2.2 Characteristics of weighing valves 74.2.3 Mechanical requirements 94.2.4 Leakage .94.3 Vibrations and shock 94.4 Environment .94.4.1 General 94.4.2 Temperature 104.4.3 Other environmental conditions . 104.5 Compressed air quality 124.6 Service life . 124.7 Fire behaviour . 124.8 External appe
13、arance . 124.9 Design requirements regarding pressure stress 124.10 Interfaces . 134.10.1 Mechanical . 134.10.2 Pneumatic 135 Materials 136 Type tests 136.1 General . 136.2 Individual automatic variable load sensing device type tests . 136.2.1 Test bench for individual automatic variable load sensin
14、g devices type tests . 136.2.2 Sampling for type test 146.2.3 Test requirements . 156.2.4 Check of physical and geometrical characteristics 156.2.5 Leakage 166.2.6 Characteristic, hysteresis 176.2.7 Operation at extreme temperatures 186.2.8 Vibration and shock tests 207 Routine tests (serial tests)
15、and inspection 207.1 General . 207.2 Check of characteristic 207.2.1 Procedure 207.2.2 Pass/fail criteria 218 Type validation 219 Documentation 2110 Designation . 22BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (E)3 11 Identification and marking 22Annex A (informative) Assessment of an automatic var
16、iable load sensing device when fitted to a vehicle. 23A.1 Vehicle assessment Testing set up 23A.2 Design acceptance testing set up . 23A.3 Running tests . 23A.3.1 General . 23A.3.2 Pneumatic automatic variable load sensing device Air consumption . 23A.3.3 Automatic variable load sensing device Outpu
17、t signal variation . 24Annex 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)“ . 25!deleted te
18、xt“ Bibliography 31BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (E)4 Foreword This document (EN 15625:2008+A1:2010) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national sta
19、ndard, either by publication of an identical text or by endorsement, at the latest by April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. C
20、EN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1, approved by CEN on 2010-08-30. This document supersedes EN 15625:2008. The start and finish of text introduced or altered by amendment is indicated in the text by tags !
21、 “. !This document has been prepared under a mandate given to CEN/CENELEC/ETSI by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2008/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an inte
22、gral part of this document.“ 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, Gree
23、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (E)5 1 Scope This European Standard applies to automatic variab
24、le load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performa
25、nce. This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edit
26、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14478:2005, Railway applications Braking Generic vocabulary EN 50125-1, Railway applications Environmental conditions for equipment Part 1: Equipment on board rolling stock
27、 EN 60721-3-5:1997, Classification of environmental conditions Part 3: Classification of groups of environmental parameters and their severities Section 5: Ground vehicle installations (IEC 60721-3-5:1997) EN 61373:1999, Railway applications Rolling stock equipment Shock and vibration tests (IEC 613
28、73:1999) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) ISO 8573-1:2001, Compressed air Part 1: Contaminants and purity classes 3 Terms, definitions and symbols 3.1 Terms and definitions For the purpo
29、ses of this document, the terms and definitions given in EN 14478:2005 and the following apply. 3.1.1 automatic variable load sensing device weighing device device connected to the vehicle, which responds to the loading of that vehicle to provide a continuous load proportional signal to the brake co
30、ntrol device NOTE The load input is normally a share of the wagons mass because of the devices position in the vehicle suspension system. The result is a pneumatic output signal pressure that can be any value between a minimum at tare mass and a maximum at maximum mass. Most of the existing self-adj
31、usting load-dependant brakes generate the load signal using a weighing device. 3.1.2 mechanically operated pneumatic device device or mechanism having both mechanical and pneumatic elements BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (E)6 3.1.3 hydraulic to pneumatic converter device or mechanism
32、which transforms the hydraulic pressure generated by the mass of the vehicle into a pneumatic pressure with a defined transmission ratio 3.1.4 elastomeric to pneumatic converter device or mechanism having both elastomeric and pneumatic components, which transforms the pressure in the elastomer gener
33、ated by the mass of the vehicle into a pneumatic pressure with a defined transmission ratio 3.1.5 output signal pressure load continuous pressure Lcp output pressure delivered by the automatic variable load sensing device, which signals the load of the vehicle to the brake control mechanism 3.1.6 su
34、pply pressure input pressure of the air supply to a pneumatic automatic variable load sensing device NOTE Typically supplied from the vehicles distributor auxiliary reservoir, or from the vehicle distributor output pressure/brake cylinder pressure system. 3.1.7 normal litre Nl unit of mass for gases
35、 equal to the mass of 1 l at a pressure of 1,013 2 bar (1 atmosphere) and at a standard temperature, often 0 C or 20 C NOTE Airflow is often stated in normal litres per minute (Nl/min). 3.1.8 sensitivity minimum change of load which causes a variation of the output signal pressure (Lcp), when the ch
36、ange of load (input) is in the same direction 3.1.9 hysteresis difference in output signal pressure (Lcp) with the same load, where the load is first rising to a value and then, having been taken past that value, subsequently falls to the same value 3.2 Symbols F kN mechanical force, generated by th
37、e share of vehicle weight acting at the automatic variable load sensing device 4 Design and manufacture 4.1 General The design and manufacture of the automatic variable load sensing device shall, for all intended operating conditions, take into account the following requirements. BS EN 15625:2008+A1
38、:2010EN 15625:2008+A1:2010 (E)7 4.2 Functional requirements 4.2.1 Operating requirements The automatic variable load sensing device shall, in all cases, supply a pneumatic output signal pressure (Lcp) which is a function of the load. The transmission of this load signal to the brake control system s
39、hall be pneumatic. The method of producing the pneumatic signal Lcp can be a mechanically operated pneumatic device, a hydraulic to pneumatic converter or an elastomeric to pneumatic converter. Figure 1 indicates the principles of operation of an automatic variable load sensing device. Key 1 automat
40、ic variable load sensing device 2 F, mechanical force, generated by a share of the vehicle weight 3 supply pressure, typically taken from the distributor auxiliary reservoir 4 Lcp, output signal pressure Figure 1 Principles of operation of the automatic variable load sensing device 4.2.2 Characteris
41、tics of weighing valves Two characteristics of weighing valves are defined: type 1: (0,8 0,1) bar/10 kN (see Figure 2); type 3: (1,0 0,1) bar/10 kN (see Figure 3). The characteristics for type 1 and type 3 shall be tested in accordance with 6.2.6. NOTE These types are recommended for new interoperab
42、le freight wagons. For applications other than interoperable freight wagons other characteristics may be used by agreement between the manufacturer and the customer. BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (E)8 Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of to
43、lerance Figure 2 Characteristic of the automatic variable load sensing device type 1 Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of tolerance Figure 3 Characteristic of the automatic variable load sensing device type 3 BS EN 15625:2008+A1:2010EN 15625:2008+A1:2010 (
44、E)9 4.2.3 Mechanical requirements The automatic variable load sensing device shall be designed to operate with at least a static force F of 60 kN without any damage or change of its characteristic. This shall be tested in accordance with 6.2.6. 4.2.4 Leakage The sealing arrangement within the automa
45、tic variable load sensing device shall prevent any unacceptable loss of air. At of (20 5) C the automatic variable load sensing device shall not have a leakage rate greater than 0,005 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.5.2, 6.2.5.3 and 6.2.
46、5.4. At an environmental temperature of 25 C, also at + 70 C, the automatic variable load sensing device shall not have a leakage rate greater than 0,01 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.7.2, 6.2.7.3 and 6.2.7.4. At 40 C environmental temp
47、erature 25 C the automatic variable load sensing device shall not have a leakage rate greater than 0,1 Nl/min at the normal working pressure. This requirement shall be tested in accordance with 6.2.7.2, 6.2.7.3 and 6.2.7.4. 4.3 Vibrations and shock The automatic variable load sensing device shall be
48、 able to operate without restriction under vibration and shock conditions as specified by EN 61373:1999, Category 2. This requirement shall be tested in accordance with 6.2.8. The automatic variable load sensing device shall fulfil the specified requirements during a random vibration test in accorda
49、nce with EN 61373:1999, Clause 8. The automatic variable load sensing device shall withstand a simulated long life test at increased random vibration levels in accordance with EN 61373:1999, Clause 9, without any loss of performance. The automatic variable load sensing device shall withstand shock testing in accordance with EN 61373:1999, Clause 10, without any loss of performance. The above shall be tested
