摘要
介绍了一种基于超磁致伸缩薄膜控制的静压轴承节流器,即在原有薄膜节流器的基础上增加控制环节,用于实现静压轴承的主动控制。利用ANSYS进行了仿真计算,推导出了薄膜在节流器内置磁场作用下的变形规律。利用MATLAB求解雷诺方程得出油腔压力与节流间隙的数值关系,最终求出磁场强度与静压轴承油腔压力的变化关系。结果表明:超磁致伸缩薄膜控制的节流器在低磁场作用时,能够对油腔压力进行较大范围的主动调节,从而使静压轴承可以获得更高的支撑精度和刚度。
A giant magnetostrictive thin film restrictor of active control hydrostatic bearing was introduced in this paper,it added the control link on the base of the original thin film restrictor,and would realize the active control of hydrostatic bearing. The deformation of the thin film mechanism in the built-in magnetic field of the restrictor was deduced by the simulation calculation with ANSYS. MATLAB was used to solve the Reynolds equation,than obtained the numerical relationship between the pressure of the oil cavity and the restrictor clearance. Finally,the relationship between the magnetic field strength and the pressure of the oil chamber of the hydrostatic bearing was found. Results showed that under low magnetic field the control of giant magnetostrictive thin film restrictor could realize the active regulation of the oil cavity pressure in a large scope,so that the hydrostatic bearings could obtain higher support accuracy and stiffness.
出处
《组合机床与自动化加工技术》
北大核心
2017年第2期65-67,72,共4页
Modular Machine Tool & Automatic Manufacturing Technique
关键词
静压轴承
磁致伸缩薄膜
节流器
主动控制
hydrostatic bearing
giant magnetostrictive thin film
restrictor
active control
