Research on improved hydrostatic guideway base thermal characteristics by flattening temperature distribution

Abstract

This paper proposed a new guideway base structure of hydrostatic guideways to flatten its spatial temperature variation characteristics. Four oil storage holes penetrating through the base are used to collect the hydraulic oil, which is heated by power losses after oil flows through the bearing clearances. When the heated oil flows into the four oil storage holes, the whole base is warmed and temperature distribution non-uniformity is avoided. In order to verify the effectiveness of the new structure, a physical model of the guideway base simplified from actual base was developed. A thermal model of a guideway base was developed using the finite element method (FEM). The temperature distribution of guideway bases was calculated, taking into account the temperature-dependent heat transfer coefficients of interfaces and thermal contact conductances. Analysis of temperature differences, thermal equilibrium time, and temperature uniformity of bases demonstrates the effectiveness of the new base design on its thermal characteristics and improves structural parameters. The experimental results verify the accuracy of the thermal model hydrostatic guideway bases.