Theoretical Analysis and Numerical Simulation of Dynamic Characteristics of Hydrostatic Guides for Heavy NC Machine Tool
Based on analysis of hydrostatic bearing with circular pocket, equations of static pressure, volvme pressure and squeezing pressure which influence dynamic characteristics of hydrostatic guides with rectangle pocket have been deduced. The function and their influencing factors of the three kinds pressure mentioned above are clarified. The amplitude-phase-frequency characteristics of the hydrostatic guides system have been analyzed qualitatively and quantitatively, it is indicated that the sensitive oil volume has greater effect on the stability of the guide, the volume should be reduced as small as possible while the hydrostatic guides meet the needs of the field working situation. To increasing the oil visosity properly is also helpful to improve the dynamic performance of hydrostatic guides.
Dynamic Properties Analysis of the Hybrid Journal Bearing in Machine Tools
The dynamic characteristics of the hybrid journal bearing under step load were analyzed and some calculations were done.Some viewpoints were raised when choosing the parameters of hybrid journal bearing.
A comparative study of flexible thrust pad hydrostatic bearings with different restrictors
Abstract The characteristics of flexible thrust pad hydrostatic bearings with different flow control devices, such as capillary, orifice and constant flow valves, have been studied. The results of bearing characteristics of circular thrust pad and single-pocket and multipocket rectangular thrust bearing configurations have been presented for various values of the deformation coefficient C d and restrictor design parameter C s2 . These results provide a comparative study of the performance of compensated flexible thrust bearing configurations.