• CN:11-2187/TH
  • ISSN:0577-6686

›› 2014, Vol. 50 ›› Issue (9): 148-152.

• 论文 • 上一篇    下一篇

流固耦合对油静压导轨动静特性的影响

王智伟;查俊;陈耀龙;赵万华   

  1. 山东科技大学机械电子工程学院;西安交通大学机械制造系统工程国家重点实验室
  • 出版日期:2014-05-05 发布日期:2014-05-05

Influencing of Fluid-structure Interactions on Static and Dynamic Characteristics of Oil Hydrostatic Guideways

WANG Zhiwei,;ZHA Jun,;CHEN Yaolong,;ZHAO Wanhua   

  1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology; State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University
  • Online:2014-05-05 Published:2014-05-05

摘要: 油静压导轨被广泛应用于超精密机床,在设计和计算时往往都是将结构件作为刚体,即在工作过程中结构件不影响静压支承油膜厚度以及油压的分布。针对环形缝隙节流闭式油静压导轨,以封油面上动态雷诺方程和导轨的弹性变形方程为基础,再结合导轨工作台动力平衡方程,建立静压导轨的流固耦合模型。分析流固耦合对静压导轨压板变形量、动静刚度以及阶跃响应的影响。研究表明,导轨压板的变形随油腔压力的增加而线性增加;导轨压板的变形会导致动静刚度减小,也会导致阶跃响应的过渡时间变长;动静刚度的实测值与导轨压板有变形时的理论计算值吻合较好。

关键词: 油静压导轨;环形缝隙节流器;流固耦合;动静特性

Abstract: Oil hydrostatic guideways are widely applied in ultra-precision machine tools, the structural parts are often considered as rigid bodies without deformations in the process of design and calculation. In other words, the effects of the structural parts on the oil film thickness and the pressure distribution are ignored in the course of working. The fluid-structure interactions model of oil hydrostatic guideways with annular slit restrictors is established. This model is based on the dynamic Reynolds equation on the land, the elastic deformation equation of the upper slideway and the table dynamic equilibrium equation. The effects of fluid-structure interactions on the deformations, static and dynamic stiffness and settling time under the step load are explored. The results show that the deformations of the upper slideway increase linearly with recess pressure, the static and dynamic stiffness are decreased by the deformations, the settling time is extended by the deformations. Measured values of the static and dynamic stiffness agree well with the theoretical values with the deformations.

Key words: oil hydrostatic guideways;annular slit restrictors;fluid-structure interactions;static and dynamic characteristics

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