Temperature field distribution of non-spherical hydrostatic bearings for ultra-precision machine tools

A series numerical models were conducted by using the computational fluid dynamic software ANSYS CFX to research the internal temperature distribution of the hydrostatic thrust bearings of aspherical ultra-precision machine tools.An experiment was performed on the hydrostatic bearings and the spindle performance parameters of the worktable were obtained in 0,300,500 kg loads,respectively.The results show that the initial temperature of the oil lumen area is 20 ℃,the temperature arises from resistive oil edges towards,and the lateral temperature is higher than that of the medial.The respective highest temperature is 20.29 ℃ or 21.72 ℃ with a lubricant film thickness of 33 μm or 23 μm,and the thinner the oil film is,the higher the temperature is.The difference of the simulation and the tests are 3.33%,8.33%,1.32%,respectively,which proves the validity of design and simulation methods for hydrostatic thrust bearings.