1、BSI Standards PublicationBS EN 16241:2014Railway applications SlackadjusterBS EN 16241:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16241:2014.The UK participation in its preparation was entrusted to TechnicalCommittee RAE/4/-/1, Railway applications - B
2、raking.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI S
3、tandardsLimited 2014ISBN 978 0 580 57775 8ICS 45.040Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2014.Amendments issued since publicationDate Text a
4、ffectedBS EN 16241:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16241 February 2014 ICS 45.040 English Version Railway applications - Slack adjuster Applications ferroviaires - Rgleur de timonerie Bahnanwendungen - Gestngesteller This European Standard was approved by CEN on 16 November
5、2013. 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 obtaine
6、d 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-C
7、ENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, I
8、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: A
9、venue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16241:2014 EBS EN 16241:2014EN 16241:2014 (E) 2 Contents Page Foreword 4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Design a
10、nd manufacture .6 4.1 Requirements .6 4.1.1 General 6 4.1.2 Maintenance of block to tread clearance 6 4.1.3 Take up .6 4.1.4 Pay out 6 4.1.5 Shock and Vibration 6 4.1.6 Space envelope 7 4.1.7 Maximum load absorption 9 4.2 Service life 9 4.3 Ambient temperature 10 4.4 Other environmental conditions .
11、 10 4.4.1 General . 10 4.4.2 Humidity . 10 4.4.3 Rain 10 4.4.4 Snow, ice and hail . 10 4.4.5 Solar radiation . 11 4.4.6 Resistance to pollution 11 4.5 External appearance . 11 5 Materials 11 6 Type test methods 11 6.1 Sampling for type test 11 6.2 Test requirements . 12 6.3 Test procedure 12 6.3.1 P
12、rinciple . 12 6.3.2 Check of physical and geometrical characteristics 12 6.3.3 Operation . 12 6.3.4 Operation at extreme temperatures 13 6.3.5 Maximum load absorption . 14 6.3.6 Life test 14 6.4 Approval validity . 14 6.5 Test Report 15 7 Routine test . 15 8 In-Service assessment . 15 9 Designation
13、. 15 10 Identification and marking . 15 Annex A (informative) In-service trial . 16 A.1 General . 16 A.2 Test set-up and sampling 16 BS EN 16241:2014EN 16241:2014 (E) 3 A.3 Procedure . 16 A.4 Pass/fail criteria . 16 Annex ZA (informative) Relationship between this European Standard and the Essential
14、 Requirements of EU Directive 2008/57/EC 17 Bibliography 21 BS EN 16241:2014EN 16241:2014 (E) 4 Foreword This document (EN 16241:2014) 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
15、 of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject
16、 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 Free Trade Association, and supports essential requirements of EU Directive 2008
17、/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA which is an integral 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, Belgi
18、um, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, 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, Switzer
19、land, Turkey and the United Kingdom. BS EN 16241:2014EN 16241:2014 (E) 5 1 Scope This European Standard establishes general principles for designing, manufacturing and type testing slack adjusters. NOTE 1 These requirements cannot be written in sufficient detail to ensure good workmanship or proper
20、construction. Each manufacturer is therefore responsible for taking every necessary step to make sure that the quality of workmanship and construction is such as to ensure accordance with good engineering practice. It is applicable to double acting slack adjusters designed to control the block (shoe
21、) to tread (wheel) clearance of tread braked vehicles with conventional brake cylinders and rigging, without taking the track-gauge into consideration. NOTE 2 The term used for this device by UIC is “Brake rigging adjuster”. 2 Normative references The following documents, in whole or in part, are no
22、rmatively 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 60721-3-5:1997, Classification of environmental conditio
23、ns Part 3: Classification of groups of environmental parameters and their severities Section 5: Ground vehicle installations EN 61373, Railway applications Rolling stock equipment Shock and vibration tests (IEC 61373) 3 Terms and definitions For the purposes of this document, the following terms and
24、 definitions apply. 3.1 tread surface of a monobloc wheel or of a separate tread on which the brake block rubs 3.2 slack adjuster device to compensate for wear of brake shoes, wheel treads, and brake rigging pivots to maintain a nominal block to tread clearance Note 1 to entry: These slack adjusters
25、 are fitted separately in the brake rigging as independent devices. These slack adjusters are sometimes referred to as regulators. 3.3 double acting works in two directions to take up excessive clearance between the brake block and tread or pay out to allow the nominal clearance to be restored betwe
26、en the brake block and tread where this is reduced 3.4 take up reduction in the length of the brake rigging caused by the operation of the slack adjuster 3.5 pay out increase in length of the brake rigging caused by the operation of the slack adjuster BS EN 16241:2014EN 16241:2014 (E) 6 4 Design and
27、 manufacture 4.1 Requirements 4.1.1 General Slack adjusters shall be able to operate in the brake rigging of railway rolling stock. Slack adjusters shall be able to be mounted in both exposed and protected locations and function correctly in normal conditions of operation. The impact of direct pollu
28、tion and shocks linked to loading and unloading of vehicles are excluded from this European Standard. 4.1.2 Maintenance of block to tread clearance Slack adjusters shall operate to maintain a set block to tread clearance within a tolerance of 2 mm. The block to tread clearance is a function of the s
29、etting of the slack adjuster control dimension “A” which is chosen to provide the required block to wheel clearance when fitted to a vehicle. Examples of installations are shown in Figure 1. This is tested in accordance with 6.3.3.1. Figure 1 4.1.3 Take up Slack adjusters shall take up excessive blo
30、ck to tread clearance in a minimum number of cycles of the brake (application and release), but this shall not be more than 3 cycles. This requirement is tested in accordance with 6.3.3.2. 4.1.4 Pay out Slack adjusters shall pay out, if the block to tread clearance is insufficient, to restore the co
31、rrect block to tread clearance. This situation may come about due to a change in the vehicles laden state. This pay out shall not increase the distance between brake block and wheel when releasing after the first brake application when the insufficient block to tread clearance is detected, but only
32、after the release following the second brake application if the distance remains insufficient. This is to prevent the clearance being increased due to the presence of ice, snow or other foreign bodies. This requirement is tested in accordance with 6.3.3.3. 4.1.5 Shock and Vibration 4.1.5.1 Shock Sla
33、ck adjusters shall not take up or pay out when subjected to longitudinal shocks in accordance with EN 61373 for body mounted equipment with one level of suspension, category 2. This requirement is tested in accordance with 6.3.3.4.1. BS EN 16241:2014EN 16241:2014 (E) 7 4.1.5.2 Vibration Slack adjust
34、ers shall not take up or pay out when subjected to vibrations in accordance with EN 61373 category 2, for body mounted equipment with one level of suspension. This requirement is tested in accordance with 6.3.3.4.2. 4.1.5.3 Compliance of existing designs Should existing designs of slack adjuster be
35、subject to the requirements of this standard, compliance with the shock and vibration requirements of this clause can be demonstrated by the documentary evidence of 10 years satisfactory service experience with a minimum of 3 operators, each with a minimum of 500 slack adjusters in service. 4.1.6 Sp
36、ace envelope Slack adjusters which act to reduce or extend the length of an active member (rod that takes the braking loads) in the brake rigging shall fit within the space envelope of Figure 2 where their load (force) capability is up to 75 kN and Figure 3 where it is greater than 75 kN and up to 1
37、30 kN. BS EN 16241:2014EN 16241:2014 (E) 8 Dimensions in millimetres Key * Length adjusted to the vehicle C Measurement mark G 36 mm pin diameter Pins shall be a case hardened steel where Rm is greater or equal to 370 N/mm2NOTE Rm is the tensile strength of the steel. K 83 mm Slack Adjuster type 1 2
38、 L Length 2 325 mm 1 875 mm M Take up 580 mm 440 mm 1 Alternative attachment arrangements for the brake rigging (XX) Figures in brackets ( ) are nominal values. Figure 2 Space envelope loads (forces) up to 75 kN BS EN 16241:2014EN 16241:2014 (E) 9 Dimensions in millimetres Key * Length adjusted to t
39、he vehicle C Measurement mark G 40 mm pin diameter Pins shall be a case hardened steel where Rm is greater or equal to 370 N/mm2NOTE Rm is the tensile strength of the steel. K 83 mm Slack Adjuster type 1 2 3 L Length 2 390 mm 1 940 mm 1 640 mm M Take up 580 mm 440 mm 280 mm 1 Alternative attachment
40、arrangements for the brake rigging (XX) Figures in brackets ( ) are nominal values. Figure 3 Space envelope loads (forces) from 75 kN to 130 kN 4.1.7 Maximum load absorption The slack adjuster shall not absorb more than 2 kN of the brake application force. This requirement is tested in accordance wi
41、th 6.3.5. 4.2 Service life A life test shall be carried out on the slack adjuster to demonstrate it is fit for service on railway vehicles and to verify the maintenance requirements for the operational design life so these can be taken into account for the actual service life. This life test shall b
42、e carried out at loads between 35 kN and the maximum rated load, spanning the full range of adjustment. This requirement is tested in accordance with 6.3.6. BS EN 16241:2014EN 16241:2014 (E) 10 4.3 Ambient temperature Slack adjusters shall be able to operate within the temperature range from 40 C to
43、 +70 C external air temperature. This requirement is tested in accordance with 6.3.4. 4.4 Other environmental conditions 4.4.1 General The following environmental conditions shall be considered in the design of the slack adjuster. It shall be demonstrated that these environmental conditions have bee
44、n taken into account in the design of the slack adjuster. It is sufficient for the supplier to make a declaration of conformity stating how the environmental conditions in the following clauses have been taken into account. If not specifically required to be tested as part of the type testing requir
45、ements in Clause 6 of this document, suitable tests and/or design assessments considering the effect of the following environmental conditions on the slack adjuster, shall be used in the development/design proving of the device, prior to type testing. 4.4.2 Humidity The following external humidity l
46、evels shall be considered: yearly average: 75 % relative humidity; on 30 d 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. An operationally caused infr
47、equent and slight moisture condensation shall not lead to any malfunction or failure. At cooled surfaces, 100 % relative humidity can occur causing condensation on parts of equipment; this shall not lead to any malfunction or failure. Sudden changes of the air temperature local to the vehicle, with
48、a rate of 3 K/s and maximum variation of 40 K, can cause condensation of water on parts of equipment; these conditions, particularly occurring when entering or leaving a tunnel, shall not lead to any malfunction or failure of the equipment. NOTE Reference to EN 50125-1. 4.4.3 Rain Rain rate of 6 mm/
49、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. NOTE Reference to EN 50125-1. 4.4.4 Snow, ice and hail Consideration shall be given to the effect of all kinds of snow, ice and 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. BS EN 16241:2014EN 1624
