论文部分内容阅读
目前,液体静压支承的动态特性理论尚不够完善,有待于做进一步深入研究。本文在考虑了油液可压缩的基础上,分析了容积效应的驱振作用和挤压效应的阻尼作用对静压支承系统动态特性的综合影响,并用数学和自控理论求得稳定性的判别公式。同时,对含气液体静压支承系统的振幅频率特性进行了分析计算,得出几种状态下的失稳频率范围。最后,在上述定性及定量分析的基础上,总结出对设计有参考价值的如下结论:1.挤压效应是动态稳定因素,因此:增大支承面积;减小支承间隙;增加油液粘度。2.容积效应是动态不稳定因素,为此:减小系统压缩容积;减少反馈节流器的压力腔容积变化;减小油液中的气体含量。
At present, the dynamic theory of hydrostatic support is not perfect enough yet to be further studied. Based on the compressibility of the fluid, this paper analyzes the combined effect of the vibration effect of the volumetric effect and the damping effect of the compression effect on the dynamic characteristics of the hydrostatic support system, and uses the mathematical and self-control theory to determine the stability of the formula . At the same time, the amplitude and frequency characteristics of the hydrostatic bearing system with gas and liquid are analyzed and calculated, and the instability frequency range under several states is obtained. Finally, based on the above qualitative and quantitative analysis, the following conclusions are drawn on the reference value of the design: 1. The squeeze effect is a dynamic stabilizing factor, therefore: increase the bearing area; reduce the bearing clearance; increase the oil viscosity. 2. The volume effect is a dynamic and unstable factor, so as to reduce the compression volume of the system, reduce the pressure chamber volume change of the feedback restrictor, and reduce the gas content in the oil.