BS ISO 20816-2-2017 Mechanical vibration Measurement and evaluation of machine vibration Land-based gas turbines steam turbines and generators in excess of 40 MW with fluid-film bei.pdf

1、Mechanical vibration Measurement and evaluation of machine vibrationPart 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/minBS ISO 20816-2:2017BSI Standards PublicationWB11885

2、_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Mechanical vibration Measurement and evaluation of machine vibration Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 6

3、00 r/minVibrations mcaniques Mesurage et valuation des vibrations de machines Partie 2: Turbines gaz, turbines vapeur et alternateurs paliers film fluide excdant 40 MW pour applications terrestres, avec des vitesses nominales de fonctionnement de 1 500 r/min, 1 800 r/min, 3 000 r/min et 3 600 r/minI

4、NTERNATIONAL STANDARDISO20816-2First edition2017-07Reference numberISO 20816-2:2017(E)National forewordThis British Standard is the UK implementation of ISO 20816-2:2017. It supersedes BS ISO 10816-2:2009 and BS ISO 7919-2:2009, which are withdrawn.The UK participation in its preparation was entrust

5、ed to Technical Committee GME/21/5, Mechanical vibration, shock and condition monitoring - Vibration of machines.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.

6、Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 93264 9ICS 27.040; 29.160.40; 17.160Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published und

7、er the authority of the Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 20816-2:2017 ISO 2017Mechanical vibration Measurement and evaluation of machine vibration Part 2: Land-based gas turbines, steam

8、 turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/minVibrations mcaniques Mesurage et valuation des vibrations de machines Partie 2: Turbines gaz, turbines vapeur et alternateurs paliers film fluide excdant 40

9、MW pour applications terrestres, avec des vitesses nominales de fonctionnement de 1 500 r/min, 1 800 r/min, 3 000 r/min et 3 600 r/minINTERNATIONAL STANDARDISO20816-2First edition2017-07Reference numberISO 20816-2:2017(E)BS ISO 20816-2:2017ISO 20816-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT

10、PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll 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

11、prior 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 officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO

12、20816-2:2017ISO 20816-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll 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, inc

13、luding photocopying, or posting on the internet or an intranet, without prior 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 officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel

14、. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 20816-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 23 Terms and definitions . 24 Measurement procedures . 24.1 General . 24.2 Measurements of vibration of non-rotating parts 34.3 Measurements of vibration of

15、rotating shafts 55 Evaluation criteria 85.1 General . 85.2 Criterion I: Vibration magnitude . 85.2.1 General 85.2.2 Vibration magnitude at rated speed under steady-state operating conditions . 85.2.3 Operational limits for steady-state operation .105.2.4 Vibration magnitude during non-steady-state c

16、onditions (transient operation) 125.3 Criterion II: Change in vibration magnitude under steady-state conditions at rated speed 145.4 Supplementary procedures/criteria . 145.5 Evaluation based on vibration vector information .15Annex A (normative) Evaluation zone boundaries for vibration of non-rotat

17、ing parts 16Annex B (normative) Evaluation zone boundaries for vibration of rotating shafts .17Annex C (informative) Example of setting ALARM and TRIP values .19Annex D (informative) Cautionary notes about the use of vibration velocity criteria at low rotational speeds 20Annex E (informative) Evalua

18、tion zone boundary limits and bearing clearance .22Bibliography .23 ISO 2017 All rights reserved iiiContents PageBS ISO 20816-2:2017ISO 20816-2:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work

19、 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, governmental and non-governmen

20、tal, 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 are described in the

21、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 drawn to the poss

22、ibility 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 on the ISO list o

23、f 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 voluntary nature of standards, the meaning of ISO specific terms and expressions related

24、 to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 108, Mechanical vibratio

25、n, shock and condition monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures.This first edition of ISO 20816-2 cancels and replaces ISO 7919-2:2009 and ISO 10816-2:2009, which have been technically revised.The main

26、 change compared to the previous edition is that the scope has been extended to change the lower output limit for large steam turbines and generators from 50 MW to 40 MW and requirements have been incorporated for large gas turbines with outputs greater than 40 MW, which are contained in ISO 7919-4

27、and ISO 10816-4. A consequence of the inclusion of large gas turbines in this document is that both ISO 7919-4 and ISO 10816-4 have been amended.A list of parts in the ISO 20816 series can be found on the ISO website.iv ISO 2017 All rights reservedBS ISO 20816-2:2017ISO 20816-2:2017(E)ForewordISO (t

28、he International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member 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 commit

29、tee has been established has the right to be represented on that committee. International organizations, governmental 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 electrotech

30、nical standardization.The procedures used to develop this document and those intended for its further maintenance are 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

31、in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is 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 righ

32、ts. Details of any patent rights identified during the development of the document will be in the Introduction and/or 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 const

33、itute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see

34、the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 108, Mechanical vibration, shock and condition monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures.Th

35、is first edition of ISO 20816-2 cancels and replaces ISO 7919-2:2009 and ISO 10816-2:2009, which have been technically revised.The main change compared to the previous edition is that the scope has been extended to change the lower output limit for large steam turbines and generators from 50 MW to 4

36、0 MW and requirements have been incorporated for large gas turbines with outputs greater than 40 MW, which are contained in ISO 7919-4 and ISO 10816-4. A consequence of the inclusion of large gas turbines in this document is that both ISO 7919-4 and ISO 10816-4 have been amended.A list of parts in t

37、he ISO 20816 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 20816-2:2017(E)IntroductionISO 20816-1 provides the general requirements for evaluating the vibration of various machine types when the vibration measurements are made on both non-rotating and rotating parts. Thi

38、s document provides specific provisions for assessing the vibration of the bearing housings or pedestals and rotating shafts of large, land-based gas turbines, steam turbines and generators. Measurements at these locations characterize the state of vibration reasonably well. Evaluation criteria, bas

39、ed on previous experience, are presented. These can be used for assessing the vibratory condition of such machines. It should be noted that in those cases where there is a high ratio between the mass of the bearing supports and the rotor, lower values of vibration of the bearing housings or pedestal

40、s can be appropriate.Two criteria are provided for assessing the machine vibration when operating under steady-state conditions. One criterion considers the magnitude of the observed vibration; the second considers changes in the magnitude. In addition, different criteria are provided for transient

41、operating conditions.The evaluation procedures presented in this document are based on broad-band measurements. However, because of advances in technology, the use of narrow-band measurements or spectral analysis has become increasingly widespread, particularly for the purposes of vibration evaluati

42、on, condition monitoring and diagnostics. The specification of criteria for such measurements is beyond the scope of this document. They are dealt with in greater detail in the relevant parts of ISO 13373 which establish provisions for the vibration condition monitoring of machines. ISO 2017 All rig

43、hts reserved vBS ISO 20816-2:2017Mechanical vibration Measurement and evaluation of machine vibration Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/min1 ScopeThis docum

44、ent is applicable to land-based gas turbines, steam turbines and generators (whether coupled with gas and/or steam turbines) with power outputs greater than 40 MW, fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min. The criteria provided in this document can

45、 be applied to the vibration of the gas turbine, steam turbine and generator (including synchronizing clutches). This document establishes provisions for evaluating the severity of the following in-situ, broad-band vibration:a) structural vibration at all main bearing housings or pedestals measured

46、radial (i.e. transverse) to the shaft axis;b) structural vibration at thrust bearing housings measured in the axial direction;c) vibration of rotating shafts radial (i.e. transverse) to the shaft axis at, or close to, the main bearings.These are in terms of the following: vibration under normal stea

47、dy-state operating conditions; vibration during other (non-steady-state) conditions when transient changes are taking place, including run up or run down, initial loading and load changes; changes in vibration which can occur during normal steady-state operation.This document is not applicable to th

48、e following:i) electromagnetic excited vibration with twice line frequency at the generator stator windings, core and housing;ii) aero-derivative gas turbines (including gas turbines with dynamic properties similar to those of aero-derivatives);NOTE ISO 3977-3 defines aero-derivatives as aircraft pr

49、opulsion gas generators adapted to drive mechanical, electrical or marine propulsion equipment. Large differences exist between heavy-duty and aero-derivative gas turbines, for example, in casing flexibility, bearing design, rotor-to-stator mass ratio and mounting structure. Different criteria, therefore, apply for these two turbine types.iii) steam turbines and/or generators with outputs less than or equal to 40 MW or with rated speeds other than 1 500 r/min, 1 800 r/min, 3 000 r/min or 3 600 r/min (although gene