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为提高液体静压转台的动力学性能,该文从N-S方程着手,计算了液体静压油腔处的动压承载力。通过供油压力计算了同位置处的静压承载力,利用动压承载力和静压承载力的相互叠加,计算了液体静压导轨综合承载力,继而推导了油膜刚度的计算公式。在此基础上,建立了以综合承载力和油膜刚度为目标函数,以液体静压转台的振动基频为约束的优化模型,利用响应面方法和分层可行下降方向法对优化模型进行了求解,并对优化后的设计进行了瞬态冲击载荷下加工精度的验证,从而为工程设计提供了理论依据。
In order to improve the dynamic performance of the hydrostatic rotary table, this paper starts from the N-S equation and calculates the dynamic pressure bearing capacity of the hydrostatic oil chamber. The hydrostatic bearing capacity at the same position was calculated by the oil supply pressure. The composite bearing capacity of the hydrostatic guideway was calculated by the superposition of hydrodynamic bearing capacity and hydrostatic bearing capacity, and then the formula of stiffness of the oil film was deduced. On this basis, the optimization model is established, which takes the composite bearing capacity and oil film rigidity as objective functions and the vibrational fundamental frequency of the hydrostatic rotary table as constraint. The optimization model is solved by means of response surface method and delamination feasible descent direction method , And verified the machining accuracy of the optimized design under transient impact load, which provides a theoretical basis for engineering design.