电液主动控制挤压油膜阻尼器的理论分析

针对旋转机械采用传统的动压轴承构成的挤压油膜阻尼器存在的问题,提出了一种由压电晶体-电液主动控制的动静压混合轴承构成的电液挤压油膜阻尼器(HSFD).对于这种电液挤压油膜阻尼器, 经典的半油膜(π油膜)假设不再成立. 为了求解它的压力分布, 提出了一种适用于含有动静压混合作用时Reynolds方程的求解方法. 在此基础上, 对采用这种电液挤压油膜阻尼器的转子系统进行了理论分析, 从而为实现主动控制奠定了基础.

Theoretical Analysis for Squeeze Film Damper withElectrohydraulic Active Control

Aiming at the problems existed in rotating machinery using traditional squeeze film damper combined with dynamic pressure bearing, a project of the hybrid oil film bearing composed of dynamic pressure and static pressure with piezoelectric crystal electrohydraulic active control supply orifice hole, i.e., electrohydraulic squeeze film damper(HSFD), is proposed. For this kind electrohydraulic squeeze film damper, the classical Sommerfeld assumption is not held. In order to solve its pressure distribution, a solution method applied to solve the Reynolds equation with hybrid action of static pressure and dynamic pressure is proposed. Based on this, the theoretical analysis for the rotor system to utilizing electrohydraulic squeeze film damper is carried out, on of the theoretical analysis of pressure distribution of this kind of electrohydraulic squeeze film damper is carried out, so the foundation to realize active control is established.