Optimization Design for the Oil Film Stiffness of Self-compensated Hydrostatic Slideway with Three-slot Structures

doi:10.3901/JME.2025.05.026

Abstract

Abstract: Hydrostatic slideways are the core functional components of various precision and ultra-precision machine tools, and their oil film stiffnesses are the key performance indices affecting the machining accuracies of the machine tools. In order to improve the support performance of self-compensated hydrostatic slideway with three-slot structures, the accurate computation and speedy optimization design methods for its oil film stiffness are proposed. A self-compensated hydrostatic slider and slideway prototype with three-slot structures are designed. The theoretical model of the oil film stiffness is established based on hydraulic Ohm's law and flow conservation, which is then validated by numerical simulation. The mathematical model for the optimization problem of the oil film stiffness is established and then solved by using genetic algorithm, and the oil film stiffness is increased by 31.6% approximately. The oil film stiffness test rig for the self-compensated hydrostatic slideway prototype is developed, and the experimental results further demonstrate the accuracy of the theoretical model and the effectiveness of the optimization design. The accurate computation and speedy optimization design for the oil film stiffness of self-compensated hydrostatic slideway with three-slot structures are achieved through the comprehensive study with an integration of theoretical modeling, numerical simulation and experimental test, which provide theoretical basis and technical support for improving the support performance of hydrostatic slideway.

Key words: hydrostatic slideway, self-compensation, oil film stiffness, theoretical modeling, optimization design

CLC Number:

TH117

CHEN Gangli, YU Liqing, CUI Hailong, LIU Cong, CHEN Kaiqiang. Optimization Design for the Oil Film Stiffness of Self-compensated Hydrostatic Slideway with Three-slot Structures[J]. Journal of Mechanical Engineering, 2025, 61(5): 26-39.

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