RESEARCH ON THE BEARING PERFORMANCE OF HYDROSTATIC OIL PAD UNDER TILTING CONDITION

Hydrostatic turntable has many advantages, such as low coefficient of friction, high load capacity and long life. However, due to the complexity of load and deformation, the principle is still not clearly known between uneven distribution of film thickness and oil pad carrying capacity. Based on the infinitesimal method, a modified Reynolds equation which considers the tilting angle of turntable is derived. According to this formula, the interrelation of turntable guide surface and the sealing edge is described by an inclination angle. The equation is used to analyze the bearing performance of oil pad when the turntable is tilted. Applying the finite difference method to solve the modified Reynolds equation, the pressure distribution of oil film is obtained. Finally, the working parameters of the oil pad and the changing rule of bearing performance with the tilting angle are established. The research result presented in this paper provides theoretical basis for the bearing capacity analysis and the oil film failure determination.