基于电液可控挤压油膜阻尼器的转子系统振动的主动控制研究

Study on Active Control of Vibration of Rotor System Based on Electro-hydraulic Active Control Squeeze Film Damper

针对采用电液主动控制挤压油膜阻尼器控制有定心弹簧的转子系统振动问题进行了理论分析与数字仿真研究。提出了一种新型的动静压挤压油膜阻尼器HSFD。在已知无轴向回油槽深油腔HSFD油膜力近似解的基础上 ,以小孔节流为例 ,对其油膜力的特性进行了分析 ,进行了稳态特性和瞬态特性的讨论 ,研究了HSFD对转子系统的控制作用。仿真表明 ,HSFD明显改善了SFD系统中经常出现的双稳态现象 。

Aiming at the problems existed in active controlling rotating machinery using squeeze film damper combined with hydrodynamic bearing with centring spring, the effectiveness of SFD was analysed theoretically, and the simulation of the was carried out A project of the hybrid oil film bearing composed of hydro dynamic and hydrostatic with piezoelectric crystal electrohydraulic active control supply orifice ,i e , electro-hydraulic squeeze film damper (HSFD),is proposed Based on the analysis of pressure distribution of this kind of electrohydraulic squeeze film damper for the rotor system, the dynamic characteristic was studied, and the control effectiveness of HSFD was concerned The result proved obviously that the HSFD is not only able to improve the bistable often arisen in the SFD systems, but also to absorb the shock in an effective way