Mechanical vibrations in hydraulic machines

This report is an updated version of chapter 6 in the previously published Elforsk report 12:70.

For the revision and integration of the current mechanical vibration standards for hydraulic power generating and pumping plants ISO/IEC 7919-5 and 10816-5 IEC and ISO are supporting an international workgroup (ISO/TC 108/SC 2 & IEC/TC 4 - JWG1 Vibration of Hydraulic Machines). To support the working group, analysis of the IEC TK4 vibration database has been performed by a Swedish national workgroup.

The purpose of the analysis has been to form a statistical foundation for a recommendation on vibration limits in a new integrated vibration standard.

Reference values are suggested to be based on median values from the database. Actions are suggested to be undertaken if the actual vibration value exceeds 1.6 and 2.5 times the reference value.