Method for calculating working performance of static-pressure sliding seats on basis of fluid-solid coupling effect

Abstract

The invention discloses a method for calculating working performance of static-pressure sliding seats on the basis of a fluid-solid coupling effect. The method comprises the following steps of: (1) analyzing stress condition of a static-pressure sliding seat according to an actual working condition, and establishing a sliding seat stress analysis sketch map; (2) simplifying the sliding seat to a thin plate model and an oil pad model according to a thin plate deformation theory and a basic structure size of the static-pressure sliding seat; (3) calculating pressure distribution and oil film thickness change of the static-pressure sliding seat oil pad model, and establishing an equation; (4) calculating deformation condition of the static-pressure sliding seat thin plate model under the action of external force, and obtaining a deflection function of the static-pressure sliding seat thin plate model; (5) establishing a sliding seat-oil pad fluid-solid coupling model through a mutual coupling relationship between sliding seat deformation and the oil film thickness change, and establishing a dynamic balance equation of the sliding seat-oil pad fluid-solid coupling model; and (6) dynamically analyzing the working performance of the static-pressure sliding seat under the actual working condition by utilizing matlab software so as to finally obtain fluid-solid coupling effect-based working performance valuation of the static-pressure sliding seat under the actual working condition.

Description

technical field [0001] The invention relates to a calculation method for the working performance of a static pressure sliding seat based on the fluid-solid coupling between the sliding seat and an oil pad, and belongs to the field of mechanical design and manufacturing. Background technique [0002] The static pressure slide seat is a key part of the precision ultra-precision heavy-duty high-end CNC machine tool. It supports the heavy-duty machine tool and drives the entire gantry frame to perform linear motion. Due to the advantages of low friction, high load capacity and high motion precision, the static pressure slide seat has been widely used in various heavy machinery parts manufacturing industries. The research on hydrostatic sliding seat abroad is earlier, the products have covered all parts, and there are mature manufacturing technologies and products. Although the domestic research is a bit late, under the trend of reform and opening up, we have vigorously introduc...

AI Technical Summary

Problems solved by technology

However, since the sliding seat is not only subjected to the gravity of the column, beam, slide plate, ram and various parts, but also the overturning moment of the upper structural parts during the movement of the sliding seat, the sliding seat itself will deform

In the previous design calculations, the sliding seat was simplified as a rigid body, and the influence of the mutual coupling between the deformation of the sliding seat itself and the change of the oil film thickness on the working performance of the sliding seat was ignored.

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