Study on the Suppressing Effect of a Squeeze Film Damper : 1st Report, End-Seal Effect and Optimum Configuration

Abstract

This paper deals with an optimum design method of the squeeze film damper used to suppress rotor vibration. At first, the dynamic characteristics of the squeeze film damper with end seals are introduced by the modified conventional short bearing theory. Then, an improved method to determine the optimum damping coefficients of the damper is shown, based on the complex eigen value analysis. To confirm above methods. an analysis of and experiment on the test rotor are carried out with respect to parameters such as radial clearance, end-seal clearance and oil temperature. Both are in good agreement and this method makes the design of the optimum damper possible.