1、BS EN 15625:2008ICS 45.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRailway applications Braking Automaticvariable load sensingdevicesLicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIThis British Standar
2、dwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2009 BSI 2009ISBN 978 0 580 58198 4Amendments/corrigenda issued since publicationDate CommentsBS EN 15625:2008National forewordThis British Standard is the UK implementation of EN 15625:2008.The UK participatio
3、n in its preparation was entrusted to TechnicalCommittee RAE/4, Braking.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct appli
4、cation.Compliance with a British Standard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15625October 2008ICS 45.060.01English VersionRai
5、lway applications - Braking - Automatic variable load sensingdevicesApplications ferroviaires - Freinage - Dispositifs de pesevariable automatiquesBahnanwendungen - Bremse - Automatisch kontinuierlichwirkende LasterfassungseinrichtungenThis European Standard was approved by CEN on 13 September 2008.
6、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 app
7、lication 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 h
8、as 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, Port
9、ugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means re
10、servedworldwide for CEN national Members.Ref. No. EN 15625:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 2 Contents Page Foreword4 1 Scope 5 2 Normative references 5 3 Terms, definitions and symbols.5 3.1 T
11、erms and definitions .5 3.2 Symbols 6 4 Design and manufacture.6 4.1 General6 4.2 Functional requirements.7 4.2.1 Operating requirements 7 4.2.2 Characteristics of weighing valves7 4.2.3 Mechanical requirements9 4.2.4 Leakage.9 4.3 Vibrations and shock 9 4.4 Environment.10 4.4.1 General10 4.4.2 Temp
12、erature .10 4.4.3 Other environmental conditions 10 4.5 Compressed air quality .12 4.6 Service life 12 4.7 Fire behaviour 13 4.8 External appearance13 4.9 Design requirements regarding pressure stress .13 4.10 Interfaces 13 4.10.1 Mechanical13 4.10.2 Pneumatic.13 5 Materials .13 6 Type tests .13 6.1
13、 General13 6.2 Individual automatic variable load sensing device type tests 14 6.2.1 Test bench for individual automatic variable load sensing devices type tests 14 6.2.2 Sampling for type test .15 6.2.3 Test requirements15 6.2.4 Check of physical and geometrical characteristics.16 6.2.5 Leakage.16
14、6.2.6 Characteristic, hysteresis .17 6.2.7 Operation at extreme temperatures.18 6.2.8 Vibration and shock tests .20 7 Routine tests (serial tests) and inspection .21 7.1 General21 7.2 Check of characteristic .21 7.2.1 Procedure .21 7.2.2 Pass/fail criteria .22 8 Type validation.22 9 Documentation.22
15、 10 Designation 22 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 3 11 Identification and marking23 Annex A (informative) Assessment of an automatic variable load sensing device when fitted to a vehicle.24 A.1 Vehi
16、cle assessment Testing set up24 A.2 Design acceptance testing set up .24 A.3 Running tests.24 A.3.1 General .24 A.3.2 Pneumatic automatic variable load sensing device Air consumption .24 A.3.3 Automatic variable load sensing device Output signal variation .25 Annex ZA (informative) Relationship betw
17、een this European Standard and the Essential Requirements of EU Directive 96/48/EC, as amended by Directive 2004/50/EC .26 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2001/16/EC, as amended by EU Directive 2004/50/EC .27 Bibliogra
18、phy28 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 4 Foreword This document (EN 15625:2008) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. Thi
19、s 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 April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. Attention is drawn to the possibility that some of the e
20、lements 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/CENELEC/ETSI by the European Commission and the European Free Trade Association,
21、and supports essential requirements of EU Directives 96/48/EC and 2001/16/EC, as amended by Directive 2004/50/EC. For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. According to the CEN/CENELEC Internal Regulations, the national stand
22、ards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Po
23、rtugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 5 1 Scope This European Standard applies to automatic variable load sensing devices
24、 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 performance. This European Stan
25、dard 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 edition cited applies. For
26、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 EN 60721-3-5:1997, Cla
27、ssification 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 61373:1999) EN ISO 228-1,
28、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 purposes of this document, t
29、he 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 control device NOTE The l
30、oad 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-adjusting load-dependant b
31、rakes generate the load signal using a weighing device. 3.1.2 mechanically operated pneumatic device device or mechanism having both mechanical and pneumatic elements Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E)
32、6 3.1.3 hydraulic to pneumatic converter device or mechanism 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 com
33、ponents, which transforms the pressure in the elastomer generated 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 th
34、e load of the vehicle to the brake control mechanism 3.1.6 supply 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
35、pressure system. 3.1.7 normal litre Nl unit of mass for gases 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
36、 a variation of the output signal pressure (Lcp), when the change 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
37、same value 3.2 Symbols F kN mechanical force, generated by the 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
38、 into account the following requirements. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 7 4.2 Functional requirements 4.2.1 Operating requirements The automatic variable load sensing device shall, in all cases, su
39、pply a pneumatic output signal pressure (Lcp) which is a function of the load. The transmission of this load signal to the brake control system shall be pneumatic. The method of producing the pneumatic signal Lcp can be a mechanically operated pneumatic device, a hydraulic to pneumatic converter or
40、an elastomeric to pneumatic converter. Figure 1 indicates the principles of operation of an automatic variable load sensing device. Key 1 automatic variable load sensing device 2 F, mechanical force, generated by a share of the vehicle weight 3 supply pressure, typically taken from the distributor a
41、uxiliary reservoir 4 Lcp, output signal pressure Figure 1 Principles of operation of the automatic variable load sensing device 4.2.2 Characteristics 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 Fi
42、gure 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 interoperable freight wagons. For applications other than interoperable freight wagons other characteristics may be used by agreement between the manufacturer and the
43、 customer. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 8 Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of tolerance Figure 2 Characteristic of the automatic variable load sensing
44、device type 1 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 9 Key 1 characteristic (nominal value) 2 upper limit of tolerance 3 lower limit of tolerance Figure 3 Characteristic of the automatic variable load sensi
45、ng device type 3 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 with
46、in the automatic 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
47、.5.3 and 6.2.5.4. 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 envir
48、onmental temperature 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 de
49、vice shall be 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. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 02/07/2009 08:26, Uncontrolled Copy, (c) BSIBS EN 15625:2008EN 15625:2008 (E) 10 The automatic variable load sensing device shall fulfil the specified requirements during a random vibration test in accordance with EN 61373:1999, Clause 8. The automatic variable load sensing devic
