The oil film lubrication performance of a large hydrostatic turntable operating at the model of constant surface cutting speed is studied. Firstly, the rotary speed equation which is bound by the constant surface cutting speed is established. According to the fluid lubrication theory, the gap flow equation, the oil film temperature rise equation and the double-rectangular-cavity oil pad bearing capacity equation are derived. Further, a prediction model of oil film lubrication performance in the operating mode is established. The change rules of temperature, pressure and other performance indexes of the film with time are obtained by numerical simulation. And, the above laws are verified by design experiments. It is found that the cutting speed, feed rate leaves a significant impact on the law of variations of oil film performance with time. According to the conclusions, it will be beneficial to improve the bearing capacity of the hydrostatic turntable and further improve the machining accuracy by using cutting parameters reasonably to control the speed within a certain range.

中文翻译：

---

切削和进给速度对大型等线速度静压转台润滑性能的影响

研究了大型静压转台在恒表面切削速度模型下的油膜润滑性能。首先，建立了恒定表面切削速度约束下的转速方程。根据流体润滑理论，推导出间隙流动方程、油膜温升方程和双矩形腔油垫承载力方程。进一步建立了工况下油膜润滑性能的预测模型。通过数值模拟得到了薄膜的温度、压力等性能指标随时间的变化规律。并且，上述规律均通过设计实验得到验证。研究发现切削速度、进给量对油膜性能随时间的变化规律有显着影响。根据结论，合理使用切削参数，将转速控制在一定范围内，将有利于提高静压转台的承载能力，进一步提高加工精度。