Development of an Efficient Oil Film Damper for Improving the Control of Rotor Vibration

[+] Author and Article Information
Shiping Zhang, Litang Yan

Jet Propulsion Department, Beijing University of Aeronautics and Astronautics, Beijing 100083, People’s Republic of China

J. Eng. Gas Turbines Power 113(4), 557-562 (Oct 01, 1991) (6 pages) doi:10.1115/1.2906277 History: Received January 16, 1990; Online April 24, 2008


An efficient oil film damper known as a porous squeeze film damper (PSFD) was developed for more effective and reliable vibration control of high-speed rotors based on the conventional squeeze film damper (SFD). The outer race of the PSFD is made of permeable sintered porous metal materials. The permeability allows some of the oil to permeate into and seep out of the porous matrix, with remarkable improvement of the squeeze film damping properties. The characteristics of PSFD oil film stiffness and damping coefficients and permeability, and also, the steady-state unbalance response of a simple rigid rotor and flexible Jeffcott’s rotor supported on PSFD and SFD are investigated. A typical experiment is presented. Investigations show that the nonlinear vibration characteristics of the unpressurized SFD system such as bistable jump phenomena and “lockup” at rotor pin-pin critical speeds could be avoided and virtually disappear under much greater unbalance levels with properly designed PSFD system. PSFD has the potential advantage of operating effectively under relatively large unbalance conditions.

Copyright © 1991 by The American Society of Mechanical Engineers
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