Static-pressure turntable dynamic response computing method based on overall dynamical model

Abstract

The invention relates to a static-pressure turntable dynamic response computing method based on an overall dynamical model. The method comprises the steps: computing the average oil film thickness of all bearing oil pads and the average oil film thickness of pre-pressed oil pads, computing bearing capacities of the pre-pressed oil pads and the bearing oil pads, building the overall dynamical model of a static-pressure turntable, and using Matlab to compute the numerical solution of the turntable dynamical model, so as to determine the dynamic response of the turntable. Aiming at the problem that by adopting the existing modeling method of the static-pressure turntable, considered factors are not comprehensive, so that the turntable response computing accuracy is influenced, the invention provides a static-pressure turntable dynamic response modeling and computing method considering the surface roughness of the oil pads and unbalance loading influence, the accuracy of the model and the dynamic response computing accuracy are improved, and a guiding function for further optimizing the dynamic performance of the static-pressure turntable is realized.

Description

technical field [0001] The invention belongs to the field of static pressure turntable analysis, and relates to a dynamic characteristic modeling and simulation calculation method of a static pressure turntable supported by a single-circle oil pad, in particular to a static pressure turntable considering the influence of oil pad surface roughness and eccentric load Dynamic response modeling and simulation calculation methods. Background technique [0002] Hydrostatic Rotary Table uses pressurized fluid to separate two surfaces with relative motion and carries them by hydrostatic pressure. Since the kinematic pairs are completely separated by the oil film, the friction between the kinematic pairs is greatly reduced, while its bearing capacity, motion accuracy and life are greatly improved. Because of the many advantages of hydrostatic support, it is widely used in heavy machine tools and becomes one of its key components. The static pressure turntable will inevitably be aff...

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Problems solved by technology

In March 2012, the paper "Dynamic Modeling and Analysis of Axial Vibration of Turntable with Hydrostatic Guideway" published in "Engineering Mechanics" Volume 29, No. 3, established the axial dynamic model of the turntable, and carried out Analysis and calculation, but did not consider the influence of eccentric load and roughness, nor did it consider the effect of preload, and almost all heavy-duty static pressure turntables are designed with pre-pressure oil pads to provide preload, so this method does not reflect the effect of the turntabl...

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