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

1、August 2009DEUTSCHE NORM English price group 12No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.160!$Xj“1539471www.d

2、in.deDDIN ISO 10816-7Mechanical vibration Evaluation of machine vibration by measurements on non-rotatingparts Part 7: Rotodynamic pumps for industrial applications, includingmeasurements on rotating shafts (ISO 10816-7:2009)English version of DIN ISO 10816-7:2009-08Mechanische Schwingungen Bewertun

3、g der Schwingungen von Maschinen durch Messungen an nicht-rotierendenTeilen Teil 7: Kreiselpumpen fr den industriellen Einsatz (einschlielich Messung derWellenschwingungen) (ISO 10816-7:2009)Englische Fassung DIN ISO 10816-7:2009-0810816-3:2009-08,supersedesDIN ISO 10816-3:1998-12www.beuth.deTogethe

4、r with DIN ISODocument comprises 22 pagesContents Page National foreword 2 National Annex NA (informative) Bibliography 3 Introduction.5 1 Scope 6 2 Normative references 7 3 Vibration measurement.7 4 Vibration evaluation . 12 5 Evaluation zones and conditions for operation in situ and acceptance tes

5、ts. 13 6 Operational limits . 14 Annex A (normative) Evaluation zone limits for vibration of non-rotating parts 16 Annex B (informative) Evaluation criteria for relative shaft vibration of rotodynamic pumps with sleeve bearings. 18 Annex C (informative) Example of setting ALARM and TRIP values 20 An

6、nex D (informative) Consideration of support flexibility and installation orientation 21 Bibliography. 22 National foreword This standard has been prepared by Technical Committee ISO/TC 108 “Mechanical vibration, shock and condition monitoring”, Subcommittee SC 2 “Measurement and evaluation of mecha

7、nical vibration and shock as applied to machines, vehicles and structures” (Secretariat: DIN, Germany) in collaboration with ISO/TC 115 “Pumps”. The responsible German body involved in its preparation was the Normenausschuss Akustik, Lrmminderung und Schwingungstechnik im DIN und VDI (Acoustics, Noi

8、se Control and Vibration Engineering Standards Committee in DIN and VDI), Technical Committees NAM 211-01 Kreiselpumpen and NA 001-03-06-02 (NALS/VDI C 6.2) Messung und Beurteilung von Maschinenschwingungen. The DIN Standards corresponding to the International Standards referred to in this document

9、are as follows: ISO 5199 DIN EN ISO 5199 ISO 5348 DIN ISO 5348 ISO 7919 DIN ISO 7919 standards series standards series ISO 9905 DIN ISO 9905 ISO 9908 DIN ISO 9908 ISO 10816 DIN ISO 10816 standards series standards series ISO 10817-1 DIN ISO 10817-1 2 DIN ISO 10816-7:2009-08 DIN ISO 10816-7:2009-08 3

10、 ISO 13373 DIN ISO 13373 standards series standards series ISO 13709 DIN EN ISO 13709 ISO 15783 DIN EN ISO 15783 Amendments This standard differs from DIN ISO 10816-3:1998-12 as follows: a) Pumps have been deleted from the scope. They are now dealt with in this standard. b) The scope of the standard

11、 is now limited to rotodynamic pumps, but with a nominal power from 1 kW onwards. c) The evaluation is made irrespective of support flexibility, but the standard distinguishes between pumps up to and above 200 kW. Previous editions DIN ISO 10816-3:1998-12 National Annex NA (informative) Bibliography

12、 DIN EN ISO 5199, Technical specifications for centrifugal pumps Class II DIN EN ISO 13709, Centrifugal pumps for petroleum, petrochemical and natural gas industries DIN EN ISO 15783, Seal-less rotodynamic pumps Class II Specification DIN ISO 5348, Mechanical vibration and shock Mechanical mounting

13、of accelerometers DIN ISO 7919-1, Mechanical vibration of non-reciprocating machines Measurements on rotating shafts and evaluation criteria Part 1: General guidelines DIN ISO 7919-2 (Draft), Evaluation of machine vibration by measurements on rotating shafts Part 2: Land-based steam turbines and gen

14、erators 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 DIN ISO 7919-3, Mechanical vibration Evaluation of machine vibration by measurements on rotating shafts Part 3: Coupled industrial machines shafts and evaluation criteria Part 4: Gas turb

15、ine sets DIN ISO 7919-5, Mechanical vibration Evaluation of machine vibration by measurements on rotating shafts Part 5: Machine sets in hydraulic power generating and pumping plants DIN ISO 9905, Technical specifications for centrifugal pumps Class I DIN ISO 7919-4 (Draft), Mechanical vibration of

16、non-reciprocating machines Measurements on rotating DIN ISO 10816-1, Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 1: General guidelines DIN ISO 10816-1/A1 (Draft), Mechanical vibration Evaluation of machine vibration by measurements on non-rotating

17、parts Part 1: General guidelines Amendment 1 DIN ISO 10816-2 (Draft), Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts 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 a

18、nd 3 600 r/min DIN ISO 10816-3, Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 3: Industrial machines with nominal power above 15 kW and nominal speeds between 120 r/min and 15 000 r/min when measured in situ DIN ISO 10816-4 (Draft), Mechanical vibrat

19、ion Evaluation of machine vibration by measurements on non-rotating parts Part 4: Gas turbine driven sets excluding aircraft derivatives DIN ISO 10816-6, Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 6: Reciprocating machines with power ratings above

20、 100 kW DIN ISO 10817-1, Rotating shaft vibration measuring systems Part 1: Relative and absolute sensing of radial vibration DIN ISO 13373-1, Condition monitoring and diagnostics of machines Vibration condition monitoring Part 1: General procedures DIN ISO 13373-2, Condition monitoring and diagnost

21、ics of machines Vibration condition monitoring Part 2: Processing, analysis and presentation of vibration data 4 DIN ISO 10816-7:2009-08 DIN ISO 9908, Centrifugal pumps Technical specifications for centrifugal pumps Class III Introduction Vibration measurements on rotodynamic pumps can be useful for

22、 many purposes, e.g. for the operational monitoring, acceptance test and for diagnostic or analytic investigation (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

23、-rotating parts in ISO 10816-1 and for shaft vibration in ISO 7919-1. This part of ISO 10816 is based 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

24、wide range of flows. Due to the large number of vibration measurements, these data are considered to be 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 e

25、valuation of these data has been made for the preferred operating region, i.e. 70 % to 120 % of the best 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

26、 and vertical orientations of the pumps when measured at the positions defined in this part of ISO 10816. 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 sli

27、ght dependency of the vibration values with the power consumption of a pump. Consequently, this part of ISO 10816 distinguishes between pumps up to and above 200 kW. Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 7: Rotodynamic pumps for industrial ap

28、plications, including measurements on rotating shafts 5 DIN ISO 10816-7:2009-08 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 vibr

29、ation when the vibration 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 p

30、lant. This part of 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 evaluat

31、ion criteria are 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

32、operation, two criteria 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

33、 transmitted to the 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 val

34、ues. For pump units 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, se

35、parately mounted 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 acce

36、ptance tests are 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. 6 DIN ISO 10816-7:2009-08 pumps in hydraulic power genera

37、ting 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 the application of this docu

38、ment. 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 measuring vibration severity I

39、SO 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 guidelines 3 Vibration measure

40、ment 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 measure the peak-to-peak dis

41、placement 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 capable of measuring the r.m.s. v

42、ibration 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 2 Hz so that the frequency

43、 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 that the broad-band peak-t

44、o-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 this it is recommended to me

45、asure 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 a more detailed analysis),

46、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. 7 DIN ISO 10816-7:2009-08 3.

47、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 length, transducer orientation. Particular attention should be given to

48、 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 object should be prepared to avoid measurement errors. Appropriate moun

49、ting 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 key measurement locations. For many pumps, mainly thos