转静子接触面超声减摩机制及应用研究

项目名称： 转静子接触面超声减摩机制及应用研究

项目编号： No.51475085

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 姚红良

作者单位： 东北大学

项目金额： 84万元

中文摘要： 针对目前涡轮类小型旋转机械转子系统经常发生转静子摩擦，从而造成破坏并影响系统稳定运行的问题，提出将超声减摩机制应用于转子系统的摩擦抑制，即通过超声作用消除摩擦或减少转静子之间的摩擦力，提高该类旋转机械转子系统的运行稳定性。 项目将采用流体运动微分方程理论研究复杂边界挤压膜悬浮机理、结合摩擦和接触理论研究超声激励下混合摩擦面减摩机理、基于非线性动力学理论研究超声作用下转子系统的振动特性和运行稳定性、运用优化方法研究超声减摩转子系统的参数优化匹配。 项目预期将阐明摩擦转子系统中超声悬浮和超声振动减摩的作用机制，掌握超声减摩转子系统的非线性振动特性和时变运行稳定性规律，探明各种参数对超声减摩作用的影响规律，获得实现超声减摩转子系统稳定运行的参数匹配方法。 项目的研究可以为超声减摩在小型旋转机械摩擦抑制中的实际应用奠定理论基础，对旋转机械其他常见故障的控制和抑制也具有重要意义。

中文关键词： 转子系统；非线性动力学；转静子摩擦；超声减摩

英文摘要： The small turbine type rotating machineries are often damaged and the rotor system may lose stability due to rotor-to-stator rub. Aiming at this problem, this project presents to apply the ultrasonic friction-reduction mechanism to rotor system, in order that the rotor-to-stator rub can be eliminated or the friction force be reduced, and the operating stability of the rotor system of this type of rotating machinery be improved. This project will study the levitation mechanism of the squeeze film with complex boundary by applying the athletic differential equation theory, and study the friction-reduction mechanism of the hybrid friction condition by combining tribology theory and contact theory together. It will also study the stability of the ultrasonic imposed rotor system based on the nonlinear dynamics theory, and the ultrasonic parameters matching method by adopting optimization theory. It's expected that the mechanism of levitation and friction-reduction by ultrasonic in the rubbing rotor system will be mastered, and also the responses and time-varying stability principles of the rubbing rotor system with ultrasonic imposing. It's also expected that the influences of parameters on ultrasonic friction-reduction will be mastered, and the ultrasonic parameters matching method to improve the stability of the ultrasonic imposed in rotor system will also be obtained. The project can build the theory basis for the acturally application of the ultrasonic friction-reduction mechanism to the rub reduction of the small scale rotating machinery, and it also means much to the control or restrain of other common faults in rotating machinery.

英文关键词： rotor system;nonlinear dynamics;rotor-to-stator rub;friction reduction by ultrasonic