BS PD ISO TS 13725-2016 Hydraulic fluid power Method for evaluating the buckling load of a hydraulic cylinder《液压传动 液压缸屈曲荷载的评估方法》.pdf
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1、Hydraulic fluid power Method for evaluating the buckling load of a hydraulic cylinder PD ISO/TS 13725:2016 BSI Standards Publication WB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National foreword This Published Document is the UK implementation of ISO/TS 13725:2016. It supersedes BS ISO/T
2、S 13725:2001 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee MCE/18, Fluid power systems and components, to Panel MCE/18/-/3, Cylinders. A list of organizations represented on this committee can be obtained on request to its secretary. This publicatio
3、n does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016 ISBN 978 0 580 89989 8 ICS 23.100.20 Compliance with a British Standard cannot confer immunity
4、from legal obligations. This Published Document was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD ISO/TS 13725:2016 ISO 2016 Hydraulic fluid power Method for evalua
5、ting the buckling load of a hydraulic cylinder Transmissions hydrauliques Mthode dvaluation du flambage dun vrin TECHNICAL SPECIFICATION ISO/TS 13725 Reference number ISO/TS 13725:2016(E) Second edition 2016-06-01 PD ISO/TS 13725:2016 ISO/TS 13725:2016(E)ii ISO 2016 All rights reserved COPYRIGHT PRO
6、TECTED DOCUMENT ISO 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without pr
7、ior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org P
8、D ISO/TS 13725:2016 ISO/TS 13725:2016(E)Foreword iv Introduction v 1 Scope . 1 2 Symbols and units . 1 2.1 General . 1 2.2 Additional notations . 2 3 General principles . 3 3.1 Purpose 3 3.2 Description . 3 3.3 Dimensional layout of hydraulic cylinder 3 3.4 Common calculation of maximum stress in th
9、e rod (for all mounting types) max. 5 3.4.1 Deflexion curve 6 3.4.2 Bending moment . 6 3.4.3 Maximum value of the bending moment 6 3.4.4 Maximum stress of the piston rod 7 3.4.5 Mounting types of the cylinder tube and piston rod 7 4 Case of pin-mounted hydraulic cylinders . 8 4.1 Model of the hydrau
10、lic cylinder and unknown values 8 4.2 Linear system . 9 4.3 Critical buckling load . 9 4.4 Greatest allowable compressive load .10 5 Case of hydraulic cylinders fixed at the beginning of the cylinder tube and pin mounted at the end of the piston rod .10 5.1 Critical buckling load 10 5.2 Linear syste
11、m 10 6 Case of hydraulic cylinders pin mounted at the beginning of the cylinder tube and fixed at the end of the piston rod 11 6.1 Critical buckling load 11 6.2 Linear system 11 7 Case of hydraulic cylinders fixed at both ends .12 7.1 Critical buckling load 12 7.2 Linear system 12 8 Case of hydrauli
12、c cylinders fixed at the beginning of the cylinder tube and free at the end of the piston rod .13 8.1 Critical buckling load 13 8.2 Linear system 14 9 Case of hydraulic cylinders fixed at both ends with free movement allowed at the end of the piston rod .15 9.1 Critical buckling load 15 9.2 Linear s
13、ystem 15 Annex A (informative) Example of numerical results 17 Bibliography .19 ISO 2016 All rights reserved iii Contents Page PD ISO/TS 13725:2016 ISO/TS 13725:2016(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO membe
14、r bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmenta
15、l and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance a
16、re described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is
17、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or
18、 on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO specific terms and expressions related to conformity ass
19、essment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 131, Fluid power systems, Subcommittee SC 3, Cylinders. This second ed
20、ition cancels and replaces the first edition (ISO/TS 13725:2001), which has been technically revised.iv ISO 2016 All rights reserved PD ISO/TS 13725:2016 ISO/TS 13725:2016(E) Introduction Historically, cylinder manufacturers in the fluid power industry have experienced very few rod buckling failures
21、, most likely due to the use of adequately conservative design factors employed during cylinder design and to the recommendation of factors of safety to the users. Many countries and some large companies have developed their own methods for evaluating buckling load. The method presented in this Tech
22、nical Specification has been developed to comply with the requirements formulated by ISO/TC 131. ISO 2016 All rights reserved v PD ISO/TS 13725:2016 Hydraulic fluid power Method for evaluating the buckling load of a hydraulic cylinder 1 Scope This document specifies a method for the evaluation of th
23、e buckling load which a) takes into account a geometric model of the hydraulic cylinder, meaning it does not treat the hydraulic cylinder as an equivalent column, b) can be used for all types of cylinder mounting and rod end connection specified in Table 2, c) includes a factor of safety, k, to be s
24、et by the person performing the calculations and reported with the results of the calculations, d) takes into account possible off-axis loading, e) takes into account the weight of the hydraulic cylinder, meaning it does not neglect all transverse loads applied on the hydraulic cylinder, f) can be i
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