Research Of Flow And Temperature Fields Of Hydrostatic Bearing Based On Fluent

Hydrostatic bearing, with its characteristics of great burden capacity and stabilization, is widely applied and becomes the core component in heavy equipments. Lubricate capability will directly influence the credibility, life-span and economic target of the whole machine tool. With the modern industrial development, rotating machinery will tend to be of high speed, heavy burden and high power, this more and more requires the high capability of hydrostatic bearings. The rise of lubricant oil temperature of Hydrostatic bearing mostly roots in system's caloric and oil film cut which is droved by workbench's rotation, and this has a close relation with the rotation speed. Moreover the workbench will distort if local is heated odds. These will bring severe hidden troubles. In order to solve these problems ultimately, it is the key to master the distributions of flow field and temperature field of Hydrostatic bearings.This thesis researches the hydrostatic bearing of the heavy Vertical NC lathe workbench. Applying the 3D formation software Pro/ENGINEER, it makes a 3-D structural design for sector and ellipse oil cavity of hydrostatic bearing, and contrast distributions of flow velocity and pressure of different shapes of oil cavity. The result is that the size of the valid interface area with upper workbench is different because of the different shapes of oil cavity. All directions of oil velocity of sector cavity are easier to be constringent and stable after iterative computations, however the velocity of ellipse fluctuates a lot. Therefore the research in hydrostatic bearing of sector oil cavity workbench is chosen, the lubricating problems under working estates are analyzed, the mathematic modeling and boundary conditions of hydrostatic Sliding Way and its 3-D flow are built in this paper. And the model equations are solved by the Finite Volume Method and the segregated solver of FLUENT based on CFD principle and laminar flow model, and the accurate distributions of asymmetry velocity of flow, pressure and temperature of periodic surface of Sliding Way are obtained. And the effects of important parameters to the result are analyzed.Through the emulator, it can simulate lubricating characteristics of hydrostatic Sliding Way in the different working conditions, and it can also be used to forecast lubricating characteristics of large size hydrostatic Sliding Way. The results are helpful for the design of large size hydrostatic bearing and the reliability of workbench.