ISO 7919 Mechanical Vibration of non-reciprocating machines – Measurements on rotating shafts and evaluation criteria – Part 5: Machine sets in hydraulic power generating and pumping plants

ISO 7919

Mechanical Vibration of non-reciprocating machines – Measurements on rotating shafts and evaluation criteria – Part 5: Machine sets in hydraulic power generating and pumping plants

This part of ISO 7919 defines guidelines for application of shaft vibration evaluation criteria under normal operating conditions, at or close to the bearings of machines or machine sets in hydraulic power generating and pumping plants.  These guidelines are presented in terms of both steady-state running vibration and any amplitude changes, which may occur in these steady values.  The numerical values specified are not intended to serve as the only basis for vibration evaluation since, in general, the vibratory condition of a machine is assessed by consideration of both the shaft vibration and the associated structural vibration (see ISO 7919-1).  It also applies to machines or machine sets in hydraulic power generating and pumping plants where the hydraulic machines have speeds from 60 r/min to 1,800 r/min, shell-or shoe-type sleeve bearings and main engine power of at least 1 MW.  The position of the shaft line may be vertical, horizontal or at an arbitrary angle between these two directions.

Machine sets covered by this part of ISO 7919 may be a combination of

–     hydraulic turbines and generators,

• pumps and electrical machines operating as motors,
• pump-turbines and motor-generators,

including auxiliary equipment (e.g. starting turbines or exciters lying in the shaft line).

Contents:

1. Scope 
2. Normative references
3. Measurement procedures
4. Evaluation criteria

Annex A Evaluation criteria for relative shaft vibration of hydraulic turbine sets under specified operating conditions

Annex B Special features of shaft vibration of hydraulic machine sets

Annex C Bibliography

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