In order to improve tribological performance of hydrostatic bearing, an innovative hydrostatic bearing structure having tilting oil pad is designed. During the operation, the semicircular boss at the bottom of the oil pad can realize the circumferential micro-motion. It generates additional dynamic pressure, and forms the static and dynamic pressure mixing support, make up for the static pressure loss, and solves the problems such as low precision and unstable operation of the numerical control equipment under the high speed and heavy load conditions. According to the tribological principle and lubrication theory, bearing capacity, flow rate, oil film thickness equation and oil film stiffness for hydrostatic and dynamic hybrid bearing are derived under variable viscosity conditions. The simulation model of hydrostatic bearing having tilting oil pad is established. ANSYS software is used to analyze the distribution of oil film temperature field and oil film pressure field under different inclination angles. The effects of tilting oil pad inclination angle on oil film tribological performance and oil film stiffness are obtained. The results show that the hydrostatic bearing having tilting oil pad can generate additional dynamic pressure in high speed operation, make up the loss of static pressure. When the inclination angle is 0.0044°, oil film temperature rise is 34.8 ℃, the average pressure is 622.2 KPa, oil film stiffness is 54104 N/µm, the comprehensive lubrication performance is optimal, the oil film stiffness is the largest, and the operation accuracy and stability of hydrostatic bearing are improved.

为了提高静压轴承的摩擦学性能，设计了一种具有倾斜油垫的创新静压轴承结构。在操作过程中，油垫底部的半圆形凸台可以实现圆周微动。它产生额外的动压，形成静压和动压的混合支撑，弥补静压损失，解决了数控设备在高速，重载条件下精度低，运行不稳定等问题。根据摩擦学原理和润滑理论，推导了可变黏度条件下静压和动态混合轴承的承载能力，流量，油膜厚度方程和油膜刚度。建立了带有倾斜油垫的静压轴承的仿真模型。用ANSYS软件分析了不同倾角下油膜温度场和油膜压力场的分布。获得了倾斜的油垫倾角对油膜摩擦性能和油膜刚度的影响。结果表明，带倾斜油垫的静压轴承在高速运行时会产生额外的动压，弥补了静压的损失。当倾角为0.0044°时，油膜温升为34.8℃，平均压力为622.2 KPa，油膜刚度为54104 N / µm，综合润滑性能最佳，油膜刚度最大，运行正常提高了静压轴承的精度和稳定性。用ANSYS软件分析了不同倾角下油膜温度场和油膜压力场的分布。获得了倾斜的油垫倾角对油膜摩擦性能和油膜刚度的影响。结果表明，带倾斜油垫的静压轴承在高速运行时会产生额外的动压，弥补了静压的损失。当倾角为0.0044°时，油膜温升为34.8℃，平均压力为622.2 KPa，油膜刚度为54104 N / µm，综合润滑性能最佳，油膜刚度最大，运行正常提高了静压轴承的精度和稳定性。用ANSYS软件分析了不同倾角下油膜温度场和油膜压力场的分布。获得了倾斜的油垫倾角对油膜摩擦性能和油膜刚度的影响。结果表明，带倾斜油垫的静压轴承在高速运行时会产生额外的动压，弥补了静压的损失。当倾角为0.0044°时，油膜温升为34.8℃，平均压力为622.2 KPa，油膜刚度为54104 N / µm，综合润滑性能最佳，油膜刚度最大，运行正常提高了静压轴承的精度和稳定性。