Application of Squeeze Film Dampers in Rotor-Bearing System of Energy Storage Flywheel
Dai Xingjian,Wei Haigang,Shen Zupei
(The Dept. of Engineering Physics, Tsinghua Uinversity, Beijing, 100084)

Abstact: Permanent magnetic bearing and the spiral groove hydrodynamic bearing are utilized as the support for the rotor of the experimental flywheel energy storage system, and squeeze film dampers supply damping for the rotor-bearing system. The analytical solution of the pressure of the squeeze film with a closed-end and an open-end is derived from Reynolds equation and long bearing theory. The stiffness and the damping characteristic coefficients of the squeeze film are achieved after some simplifications are taken. The calculated unbalance response is compared with the test response of the rotor-bearing-damper system.
Keywords: squeeze film damper, rotor, flywheel energy storage.