Vibration Control in Rotating Machinery Using Variable Dynamic Stiffness Squeeze-Films
Abstract
This report describes work carried out with the aim of developing a combined hydrostatic and squeeze-film bearing, for rotating machinery, whose dynamic characteristics may be tuned during operation of the machine. The purpose of this is to enable the operator to exercise control over machine critical speeds and vibrations. A computer program has been written to predict the characteristics of the bearing type, the program allows for the presence of accumulators linked to the bearing oil film whose purpose is to modify the bearing dynamic characteristics. A test rig has been designed and built, based on a General Electric TF34 turbofan engine, and both theoretical and experimental results confirm that a substantial shift in critical speed is effected by using the bearing, and that system vibration and force transmissibility may be reduced substantially when compared with the performance of conventional squeeze film bearings and journal bearings. Keywords: Vibration, Rotors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1988
- Accession Number
- ADA202902
Entities
People
- M. J. Goodwin
- M. P. Roach
Organizations
- Staffordshire University