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1、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15625 October 2008 ICS 45.060.01 English Version Railway applications - Braking - Automatic variable load sensing devices Applications ferroviaires - Freinage - Dispositifs de pese variable automatiques Bahnanwendungen - Bremse - Automatisch konti
2、nuierlich wirkende Lasterfassungseinrichtungen This European Standard was approved by CEN on 13 September 2008. 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 alt
3、eration. 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 tr
4、anslation 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Ger
5、many, 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUN
6、G Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15625:2008: E EN 15625:2008 (E) 2 Contents Page Foreword4 1 Scope 5 2 Normative references5 3 Terms, definitions and symbo
7、ls.5 3.1 Terms and definitions .5 3.2 Symbols6 4 Design and manufacture.6 4.1 General6 4.2 Functional requirements.7 4.2.1 Operating requirements7 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.
8、4.2 Temperature.10 4.4.3 Other environmental conditions 10 4.5 Compressed air quality.12 4.6 Service life12 4.7 Fire behaviour13 4.8 External appearance13 4.9 Design requirements regarding pressure stress .13 4.10 Interfaces13 4.10.1 Mechanical13 4.10.2 Pneumatic.13 5 Materials .13 6 Type tests .13
9、6.1 General13 6.2 Individual automatic variable load sensing device type tests14 6.2.1 Test bench for individual automatic variable load sensing devices type tests14 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
10、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 1
11、0 Designation 22 EN 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 Vehicle 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
12、 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 between this European Standard and the Essential Requirements of EU Directive 96/48/EC, as amended by Directive 2004/50/E
13、C.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 Bibliography28 EN 15625:2008 (E) 4 Foreword This document (EN 15625:2008) has been prepared by Technical Committee CEN/TC 256 “R
14、ailway applications”, the secretariat 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 April 2009, and conflicting national standards shall be withdrawn at the latest by Ap
15、ril 2009. Attention is drawn to 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/CENELEC/ETSI by
16、 the European Commission and the European Free Trade Association, 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. Acc
17、ording to the CEN/CENELEC Internal Regulations, the national standards 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, Lat
18、via, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15625:2008 (E) 5 1 Scope This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a rai
19、lway 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 Standard specifies the requirements for the design, d
20、imensions, 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 undated references, the latest edition of the ref
21、erenced 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, Classification of environmental conditions Part 3: C
22、lassification 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, Pipe threads where pressure-tight joints are not
23、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, the terms and definitions given in EN 14478:2005 a
24、nd 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 load input is normally a share of the wagons mass
25、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 brakes generate the load signal using a weighing d
26、evice. 3.1.2 mechanically operated pneumatic device device or mechanism having both mechanical and pneumatic elements EN 15625:2008 (E) 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
27、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 generated by the mass of the vehicle into a pneumatic pressure with a defined transmission ratio 3.1.5 outpu
28、t 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 supply pressure input pressure of the air supply to a pneumatic automatic variable load sensing device NO
29、TE 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 equal to the mass of 1 l at a pressure of 1,013 2 bar (1 atmosphere) and at a standard temperature, of
30、ten 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 change of load (input) is in the same direction 3.1.9 hysteresis difference in output signal pressure (Lc
31、p) 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 the share of vehicle weight acting at the automatic variable load sensing device 4 Design and manufacture
32、 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. EN 15625:2008 (E) 7 4.2 Functional requirements 4.2.1 Operating requirements The automatic variable load sensing device sh
33、all, 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 shall be pneumatic. The method of producing the pneumatic signal Lcp can be a mechanically operated pneumatic device, a hydraulic to pn
34、eumatic converter or 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 f
35、rom the distributor auxiliary 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
36、,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 interoperable freight wagons. For applications other than interoperable freight wagons other characteristics may be used by agreement between the
37、 manufacturer and the customer. -,-,- EN 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 device type 1 EN 15625:2008 (E) 9 Key 1 characteristic (nominal value) 2 upper limit of
38、tolerance 3 lower limit of tolerance Figure 3 Characteristic of the automatic variable load sensing 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 characte
39、ristic. This shall be tested in accordance with 6.2.6. 4.2.4 Leakage The sealing arrangement within 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
40、 at the normal working pressure. This requirement shall be tested in accordance with 6.2.5.2, 6.2.5.3 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
41、. 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 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 w
42、ith 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 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. EN 15625:2008
43、(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 device shall withstand a simulated long life test at increased random vibration levels in accordanc
44、e 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 in accordance with 6.2.8. 4.4 Environment 4.4.1 General Th
45、e design shall take into account that the automatic variable load sensing device shall be able to be put into service and operate normally in the conditions and climatic zones for which it is designed and in which it is likely to run, as specified in this European Standard. NOTE 1 The environmental
46、conditions are expressed in classes for temperature etc. thereby giving the vehicle designer the choice of an automatic variable load sensing device suitable for operation on a vehicle all over Europe, or have a restricted use. NOTE 2 The environment range limits specified are those that have a low
47、probability of being exceeded. All specified values are maximum or limit values. These values may be reached, but do not occur permanently. Depending on the situation there can be different frequencies of occurrence related to a certain period of time. NOTE 3 The environment requirements of this Eur
48、opean Standard cover the environment requirements of the HS RST TSI which only refers to EN 50125-1:1999. The automatic variable load sensing device shall be tested in accordance with requirements given in Clause 6 including where required environmental/climatic testing. 4.4.2 Temperature The automa
49、tic variable load sensing device covered by this European Standard shall be able to operate: at 25 C environmental temperature 70 C without any deviation from the technical requirements specified in Clause 4; at 40 C environmental temperature 25 C with allowed deviation from the technical requirements specified in this European Standard but without affecting the function of the automatic variable load sensing device. Deviations from the technical requirement wh