基于有限差分法的内反馈液体静压导轨油膜刚度仿真分析  

Simulation analysis of oil film stiffness of internal feedback hydrostatic guide rail based on FDM

作　　者：肖晓萍 刘聪 陈刚利 李自胜[2] 郑越青 XIAO Xiaoping;LIU Cong;CHEN Gangli;LI Zisheng;Zheng Yueqing(Engineering Technology Center,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Sichuan Precision and Ultra-precision Machining Engineering Technology Center,Chengdu 610200,Sichuan,China)

机构地区：[1]西南科技大学工程技术中心,四川绵阳621010 [2]西南科技大学制造科学与工程学院,四川绵阳621010 [3]四川省精密超精密加工工程技术研究中心,四川成都610200

出　　处：《中国工程机械学报》2025年第1期1-5,共5页Chinese Journal of Construction Machinery

基　　金：国家自然科学基金资助项目(52105129,52275470);国家重点研发计划资助项目(2020YFB2007600)。

摘　　要：为了进一步研究内反馈节流对液体静压导轨油膜刚度的影响,设计了一种内反馈液体静压导轨。首先,基于有限差分法(FDM)对其静态雷诺控制方程进行了离散推导和数值求解;其次,通过ANSYS Fluent有限元仿真分析验证了算法的准确性;最后,研究了内反馈节流器各个结构参数对导轨油膜刚度的影响。研究表明:内反馈液体静压导轨的油膜刚度或角刚度会随着溜板偏心距或转角的增大而减小;随着节流边长l_(1)、节流边宽b_(1)的增大,导轨油膜的刚度、角刚度均会呈现先增大后减小的趋势,而油膜刚度、角刚度与节流封边宽b_(2)的变化呈正相关。本文研究结果对后续内反馈静压导轨的设计及承载特性提升的研究,提供了有价值的理论基础。In order to further study the influence of internal feedback throttling on the oil film stiffness of hydrostatic guide,an internal feedback hydrostatic guide was designed in this paper.Firstly,based on finite difference method(FDM),the static Reynolds governing equation was derived discretely and solved numerically.Secondly,the accuracy of the algorithm was verified by ANSYS Fluent finite element simulation analysis.Finally,the influence of various structural parameters of the internal feedback restrictor on the oil film stiffness of the guide rail was studied.The results show that the oil film stiffness or angular stiffness of the internal feedback hydrostatic guide decreases with the increase of the eccentricity or Angle of the slide.In addition,with the increase of throttle length l_(1) and throttle width b_(1),the oil film stiffness and Angle stiffness of the guide rail will increase first and then decrease,and the oil film stiffness and Angle stiffness are positively correlated with the change of throttle seal width b_(2).The research on the design of internal feedback hydrostatic guide and the improvement of load bearing characteristics provides a valuable theoretical basis.

关 键 词：液体静压导轨 内反馈节流 有限差分法 油膜刚度 

分 类 号：TH133.36[机械工程—机械制造及自动化]