A New Journal Bearings Based on Piezoelectric Actuators

Abstract:- In this paper we propose a new lubricated journal bearing based on piezoelectric actuators. The actuators are used to generate traveling waves on the internal surface of the bearing. The radial displacements can influence the oil film thickness modifying the pressure distribution in the journal bearing gap. This link can be used to control the fluid film force in order to: 1) avoid instability of the rotor 2) to drive the rotor through of the friction force field generated on it