燕尾静压导轨初始油膜厚度对静动态性能的影响

燕尾静压导轨的工作性能与其选取的初始油膜厚度密切相关。通过对由PM流量控制器调控的燕尾静压导轨进行研究，分析并推导出初始油膜厚度与静压导轨静动性能之间的函数关系。结果表明：增大导轨底层大面和燕尾面初始油膜厚度，都可以提高导轨的承载能力，但提升幅度不大；降低导轨底层大面和燕尾面初始油膜厚度，均会增大低燕尾导轨的静、动态刚度，其中导轨底层大面初始油膜厚度的变化对静刚度影响更大，燕尾面初始油膜厚度的变化则对动刚度影响更大，在实际中应该根据所设计导轨工况选取合适的初始油膜厚度。

Influence of Initial Oil Film Thickness on Static and Dynamic Performances of Dovetail Hydrostatic Guide

The performance of dovetail hydrostatic guideway is closely related to the selected initial oil film thickness.The relationship between the initial oil film thickness and the static and dynamic performances of the closed hydrostatic guide regulated by PM flow controller was analyzed and derived.The results show that increasing the initial oil film thickness of both bottom large surface and dovetail surface can effectively improve the bearing capacity of the guide,but the increase is not significant.Reducing the initial oil film thickness of both bottom large surface and dovetail surface can improve the static stiffness and dynamic stiffness of the dovetail guide.The change in initial oil film thickness on the bottom large surface of the guide has a greater impact on static stiffness,while the change in initial oil film thickness on the dovetail surface has a greater impact on dynamic stiffness.In actual working conditions,an appropriate initial oil film thickness should be selected based on the designed guide operating conditions.