液体静压支承动态性能表达式与应用

液体静压支承具有许多优良性能 :高运动精度 ,低摩擦功耗 ,小轴芯偏移 ,大承载能力 ,强抗震能力与长使用寿命等。但这些好的静态性能必须在优良的支承系统动态性能条件下才能充分显示出来。因此支承静态性能保证运动精度而动态性能保证工作条件。根据力学平衡与流量连续条件建立支承系统传递函数 ,导出支承系统动态性能表达式即系统稳定性、动刚度、固有频率、最大振幅与系统抗瞬态干扰能力的新表达式。通过实验验证 ,新动态性能表达式计算结果可靠 ,而且物理概念清晰 ,故可用于实际工作。

New Formulas of Dynamic Characteristic of Hydrostatic Bearing and Its Applications

Hydrostatic bearing has many advantages , such as high accuracy of movement, low power consumption of friction , small deflection of bearing center , high capacity of load carrying ,powerful absorption of vibration and long life of operation ,etc. But good static performance can fully be displayed only under good dynamic performance of hydrostatic bearing. The moving and rotating accuracy are determined by its static performance and the working conditions are decided by its dynamic performance. This paper establishes the transfer function of hydrostatic bearing and derives the new formulas of its dynamic performance, namely the formulas of system stability, dynamic stiffness, nature frequency, maximum amplitude , system anti interference according to mechanic balance and flow continunity.It is proved that these formulas are reliable, clear and practical to the application.