Theoretical and Experimental Study on a Capillary Compensated Multi-pad Hydrostatic Turntable

A dynamics model of a spindle system for capillary compensated multi-pad hydrostatic turntable was established.The dynamic and static characteristics of partial load of the spindle system were obtained by using Simulink software.The influences of different external loads and loading positions to thickness and bearing capacity of oil film,oil cavity pressure and the deflection angle of hydrostatic turntable were analyzed.A delicate test rig of hydrostatic turntable was constructed.Dynamic load test and swept sine excitation experiments were carried out for hydrostatic turntable of the eight oil pads.Numerical results and experimental results show that the theoretical model is reasonable,which provides a theoretical basis for optimizing design of hydrostatic turntable and improving the machining precision of precision machine tools.