可调节转子临界转速的新型支承设计与研究

Designing and Researching on a New Type of Supporting Mechanism for Adjusting the Critical Speed of Rotor

支承刚度对转子系统的临界转速等动力特性有很大的影响,由此推出一种新型的刚度可调节的转子支承系统。该系统可以对水平支承刚度和垂直支承刚度进行"解耦",有利于对转子系统进行动力学研究;该支承可对转子支承的整体刚度进行调节,从而对转子系统的临界转速进行控制。在这种新型的支承方式下,运用传递矩阵法、广义影响系数法对这种支承机构转子系统的临界转速可调节性做了理论分析,证明该新型转子支承系统可有效的对转子系统的临界转速进行调节。

Supporting stiffness has a great influence on the critical speed and on other dynamic characteristics of rotor.This paper presented a new type of supporting mechanism that not only can effectively separate the horizontal bearing stiffness and vertical stiffness but also is valuable for the study of rotor dynamics. Meanwhile,the stiffness of the supporting mechanism can be adjusted so that the critical speed of rotor system can be controlled. Theoretical analysis is conducted for the performance of adjusting critical speed with this new type of supporting mechanism with the transfer matrix method and the generalized influence coefficient method. The results are verified by finite element method and it is shown that this new type of supporting mechanism can be used effectively to adjust the critical speed of rotor system.