Thermal analysis of the hydrostatic spindle system by the finite volume element method
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The temperature rise of an ultra-precision machine tool has a great impact on machining accuracy. Meanwhile, the hydrostatic spindle system is the main internal heat source of the machine tool, which consists of a hydrostatic spindle and a direct current motor. Therefore, it is very significant to study the thermal behaviors of the hydrostatic spindle system. In this paper, an integrated heat-fluid–solid coupling model of the hydrostatic spindle system is built to simulate the heat generation process and the fluid–structure conjugate heat transfer. Then a finite volume element method (FVEM) is proposed by combining the advantages of the finite volume method (FVM) and the finite element method (FEM) with consideration of the interaction of the temperature field, thermal deformation, and eccentricity. Based on the proposed model and method, the thermal characteristics of the hydrostatic spindle system are studied by the two-way heat-fluid–solid coupling analysis. The temperature variations obtained by the simulation agree well with the experimental results, which validate the proposed model and method.
KeywordsHydrostatic spindle system Heat-fluid–solid coupling model Finite volume element method Thermal behavior
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