BS ISO 21940-13:2012
Current
The latest, up-to-date edition.
Mechanical vibration. Rotor balancing Criteria and safeguards for the insitu balancing of medium and large rotors
Hardcopy , PDF
English
04-30-2012
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 In-situ balancing
5 Criteria for performing in-situ balancing
6 Safeguards
7 Measurements
8 Operational conditions
9 Reporting
Annex A (normative) - Precautions and safeguards for
specific machine types during in-situ balancing
Annex B (informative) - Example of an in-situ balancing
report for a boiler fan <= 1 MW
Annex C (informative) - Example of an in-situ balancing
report for a large > 50 MW turbine generator set
Bibliography
Describes procedures to be adopted when balancing medium and large rotors installed in their own bearings on site.
| Committee |
GME/21/5
|
| DevelopmentNote |
Supersedes BS ISO 20806. (04/2012)
|
| DocumentType |
Standard
|
| Pages |
34
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This part of ISO21940 specifies procedures to be adopted when balancing medium and large rotors installed in their own bearings on site. It addresses the conditions under which it is appropriate to undertake in-situ balancing, the instrumentation required, the safety implications and the requirements for reporting and maintaining records.
This part of ISO21940 can be used as a basis for a contract to undertake in-situ balancing.
It does not provide guidance on the methods used to calculate the correction masses from measured vibration data.
NOTE The procedures covered in this part of ISO21940 are suitable for medium and large machines. However, many of the principles are equally applicable to machines of a smaller size, where it is necessary to maintain good records of the vibration behaviour and the correction mass configurations.
| Standards | Relationship |
| ISO 21940-13:2012 | Identical |
| ISO 13373-1:2002 | Condition monitoring and diagnostics of machines — Vibration condition monitoring — Part 1: General procedures |
| ISO 1940-1:2003 | Mechanical vibration Balance quality requirements for rotors in a constant (rigid) state Part 1: Specification and verification of balance tolerances |
| ISO 1925:2001 | Mechanical vibration Balancing Vocabulary |
| ISO 2954:2012 | Mechanical vibration of rotating and reciprocating machinery — Requirements for instruments for measuring vibration severity |
| ISO 10817-1:1998 | Rotating shaft vibration measuring systems Part 1: Relative and absolute sensing of radial vibration |
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