BS ISO 10816-7-2009 Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Rotodynamic pumps for industrial applications including measureme.pdf

1、BS ISO10816-7:2009ICS 17.160NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDMechanical vibration Evaluation ofmachine vibration bymeasurements on non-rotating partsPart 7: Rotodynamic pumps forindustrial applications, includingmeasurements on rotating shaftsThis

2、 British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2009 BSI 2009ISBN 978 0 580 57438 2Amendments/corrigenda issued since publicationDate CommentsBS ISO 10816-7:2009National forewordThis British Standard is the UK implementation of ISO 10816-7:20

3、09.The UK participation in its preparation was entrusted to TechnicalCommittee GME/21/5, Vibration of machines.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. User

4、s are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 10816-7:2009Reference numberISO 10816-7:2009(E)ISO 2009INTERNATIONAL STANDARD ISO10816-7First edition2009-02-01Mechanical vibration Evaluation of machine vibration by

5、measurements on non-rotating parts Part 7: Rotodynamic pumps for industrial applications, including measurements on rotating shafts Vibrations mcaniques valuation des vibrations des machines par mesurages sur les parties non tournantes Partie 7: Pompes rotodynamiques pour applications industrielles,

6、 y compris mesurages sur les arbres tournants BS ISO 10816-7:2009ISO 10816-7:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are license

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10、g and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerlan

11、d ii ISO 2009 All rights reservedBS ISO 10816-7:2009ISO 10816-7:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references2 3 Vibration measurement.2 4 Vibration evaluation 7 5 Evaluation zones and conditions for operation in situ and acceptance

12、tests8 6 Operational limits 9 Annex A (normative) Evaluation zone limits for vibration of non-rotating parts .11 Annex B (informative) Evaluation criteria for relative shaft vibration of rotodynamic pumps with sleeve bearings13 Annex C (informative) Example of setting ALARM and TRIP values.15 Annex

13、D (informative) Consideration of support flexibility and installation orientation.16 Bibliography17 BS ISO 10816-7:2009ISO 10816-7:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memb

14、er 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, government

15、al 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Direct

16、ives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodie

17、s casting a vote. 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 rights. ISO 10816-7 was prepared by Technical Committee ISO/TC 108, Mechanical vibration, s

18、hock and condition monitoring, Subcommittee SC 2, Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures, in collaboration with ISO/TC 115 Pumps. ISO 10816 consists of the following parts, under the general title Mechanical vibration Evaluation o

19、f machine vibration by measurements on non-rotating parts: Part 1: General guidelines Part 2: Land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1 500 r/min, 1 800 r/min, 3 000 r/min and 3 600 r/min Part 3: Industrial machines with nominal power above 15 kW a

20、nd nominal speeds between 120 r/min and 15 000 r/min when measured in situ Part 4: Gas turbine sets with fluid-film bearings Part 5: Machine sets in hydraulic power generating and pumping plants Part 6: Reciprocating machines with power ratings above 100 kW Part 7: Rotodynamic pumps for industrial a

21、pplications, including measurements on rotating shafts BS ISO 10816-7:2009ISO 10816-7:2009(E) ISO 2009 All rights reserved vIntroduction Vibration measurements on rotodynamic pumps can be useful for many purposes, e.g. for the operational monitoring, acceptance test and for diagnostic or analytic in

22、vestigation (condition monitoring). General descriptions of the principles to be applied for the measurement and assessment of vibration on coupled industrial machines are given for vibration on non-rotating parts in ISO 10816-1 and for shaft vibration in ISO 7919-1. This part of ISO 10816 is based

23、on vibration data gathered from a survey of about 1 500 pumps operating both in situ and at various test facilities. This survey included pumps of different types, speed and power, operating over a wide range of flows. Due to the large number of vibration measurements, these data are considered to b

24、e representative of pumps that are operating satisfactorily, though there is a lack of information about the mean time between failure and operating conditions for the measured values. Statistical evaluation of these data has been made for the preferred operating region, i.e. 70 % to 120 % of the be

25、st efficiency point (BEP), as well as evaluations of the flow and power dependency. This vibration survey showed no significant differences between rigid and flexible supports, or between horizontal and vertical orientations of the pumps when measured at the positions defined in this part of ISO 108

26、16. This is in contrast to other standards dealing with vibration measurements (e.g. ISO 10816-1, ISO 10816-3 and ISO 1370910) which do make these distinctions. The statistical analysis showed a slight dependency of the vibration values with the power consumption of a pump. Consequently, this part o

27、f ISO 10816 distinguishes between pumps up to and above 200 kW. BS ISO 10816-7:2009BS ISO 10816-7:2009INTERNATIONAL STANDARD ISO 10816-7:2009(E) ISO 2009 All rights reserved 1Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 7: Rotodynamic pumps for indu

28、strial applications, including measurements on rotating shafts 1 Scope This part of ISO 10816 gives instructions for the evaluation of vibration on rotodynamic pumps for industrial applications with nominal power above 1 kW. It defines the special requirements for evaluation of vibration when the vi

29、bration measurements are made on non-rotating parts (bearing housing vibration). It provides specific guidance for assessing the severity of vibration measured on bearing housings of rotodynamic pumps in situ and for the acceptance test at the manufacturers test facility or in the plant. This part o

30、f ISO 10816 also gives general information and guidelines for assessing relative shaft vibration of the rotating shaft. This part of ISO 10816 specifies zones and limits for the vibration of horizontal and vertical pumps irrespective of their support flexibility. The general evaluation criteria are

31、valid for operational monitoring of rotodynamic pumps and for acceptance tests1)in situ or at the manufacturers test facility if specified. For the acceptance test at the manufacturers test facility, special conditions are given. For monitoring the vibration values during long-term operation, two cr

32、iteria are provided for assessing the machine vibration. One criterion considers the magnitude of the observed vibration and the second considers changes in magnitude. The evaluation criteria are applicable for the vibration produced by the pump itself and not for vibration which is transmitted to t

33、he pump from external sources. The criteria mainly serve to ensure a reliable, safe long-term operation of the pump, simultaneously minimizing harmful effects on connected devices. Additionally, recommendations are given for defining operational limits and setting alarm and trip values. For pump uni

34、ts with integrated electrical motors (impeller directly on the motor shaft or impeller shaft rigidly connected to the motor shaft), this part of ISO 10816 applies to the whole coupled unit. For flexibly coupled motors, this part of ISO 10816 is applicable for the pump only. Also, separately mounted

35、drivers are not within the scope of this part of ISO 10816. Those drivers are dealt with in ISO 10816-3. The following types of pumps are excluded from this part of ISO 10816: reciprocating and rotating positive displacement pumps; reciprocating engine driven pumps; 1) Wherever acceptance tests are

36、mentioned in this part of ISO 10816 it should be taken into account that all the details about place, size and form of those test procedures are optional and need to be specified and agreed between both parties of a contract. BS ISO 10816-7:2009ISO 10816-7:2009(E) 2 ISO 2009 All rights reserved pump

37、s in hydraulic power generating and pumping plants with power above 1 MW (see ISO 7919-54and ISO 10816-5); solids handling, slurry and submersible pumps. Torsional vibration is not dealt with in this part of ISO 10816. 2 Normative references The following referenced documents are indispensable for t

38、he application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2954, Mechanical vibration of rotating and reciprocating machinery Requirements for instruments for mea

39、suring vibration severity ISO 7919-1, Mechanical vibration of non-reciprocating machines Measurements on rotating shafts and evaluation criteria Part 1: General guidelines ISO 10816-1:1995, Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 1: General gui

40、delines 3 Vibration measurement 3.1 Measurement quantity and procedure The measurement quantity to be used for measuring the vibration of non-rotating parts2)of rotodynamic pumps is the root-mean-square (r.m.s.) vibration velocity in mm/s. For speeds below 600 r/min, it is additionally required to m

41、easure the peak-to-peak displacement in m. The measurement procedure to be followed is specified in ISO 10816-1. 3.2 Measuring instrumentation and frequency range 3.2.1 General The measuring instrumentation shall conform to the requirements set out in ISO 10816-1. The instrumentation shall be capabl

42、e of measuring the r.m.s. vibration velocity in a broad frequency range reaching from at least 10 Hz to 1 000 Hz and shall be in accordance with the requirements of ISO 2954. For pumps with operating speeds below 600 r/min, the lower frequency limit of the measuring instrumentation shall normally be

43、 2 Hz so that the frequency of the vibration component at operating speed is well within the measured frequency range. In addition, the measuring instrumentation shall measure both r.m.s. vibration velocity (in millimetres per second) and peak-to-peak displacement (in micrometres). Owing to the fact

44、 that the broad-band peak-to-peak displacement in the low-frequency range can be strongly influenced by stochastic, impulsive excitations due to the fluid flow, sometimes higher than normal values might occur and should then be analysed and explained e.g. by frequency filtering. In accordance with t

45、his it is recommended to measure the peak-to-peak displacement for the filtered values at 0,5 times, 1 times and 2 times the operating speed with a bandwidth of 1 Hz or less to evaluate the quality of a pump. For very high-speed pumps or for diagnostic purposes (see e.g. ISO 13373-18which specifies

46、a more detailed analysis), it may be required to use measuring instrumentation which covers a wider frequency range, usually up to 2,5 times the blade-passing frequency so that the blade-passing frequency components are adequately accounted for. 2) For measurements on rotating shafts, see Annex B. B

47、S ISO 10816-7:2009ISO 10816-7:2009(E) ISO 2009 All rights reserved 33.2.2 Precautions Care shall be taken to ensure that the measuring instrumentation is not influenced by factors such as: temperature variations, magnetic fields, sound fields, power source variations, earth loops, transducer cable l

48、ength, transducer orientation. Particular attention should be given to ensure that the vibration transducers are correctly mounted and that such mountings do not degrade the accuracy of the measurements. If vibration transducers with a magnetic base are used, the support surface at the measurement o

49、bject should be prepared to avoid measurement errors. Appropriate mounting methods are shown in Figure 1. NOTE ISO 53482contains information on the mechanical mounting of accelerometers which is, in general, also applicable to velocity transducers. Figure 1 Mounting methods for vibration transducers 3.2.3 Continuous and periodic monitoring It is common practice on large or critical pumps to have permanently installed instrumentation for continuous on-line monitoring of vibration at