A method for controlling the temperature rise of the oil pad on the inclined surface of the hydrostatic circular guide rail

Abstract

The invention provides a method for controlling the temperature rise of an oil pad on a slope of a static pressure circular guide rail. The steps are as follows: according to the flow mechanism of the oil film in the gap between adjacent oil pads on the static pressure circular guide rail, determine the area where periodic heat is affected; obtain the static pressure The periodic heat influence parameters of the circular guide rail, and calculate the periodic heat influence coefficient of the oil pad on the slope of the static pressure circular guide rail in the area where the periodic heat influence occurs; then establish the control equation for the temperature rise of the oil pad and calculate the oil film on the slope oil pad of the static pressure circular guide rail For temperature rise, the temperature rise model of the oil pad oil film on the inclined surface of the static pressure circular guide rail is established; finally, the oil supply temperature of the hydraulic system of the static pressure circular guide rail is adjusted according to the temperature rise model of the oil pad oil film on the inclined surface of the static pressure circular guide rail. The invention is used for improving the processing performance and running precision of the static pressure circular guide rail thrust bearing.

Description

technical field [0001] The invention belongs to the technical field of static pressure guide rail control, and in particular relates to a method for controlling the temperature rise of an inclined-plane oil pad of a static pressure circular guide rail. Background technique [0002] At present, large-scale CNC processing equipment has higher and higher requirements on the load-carrying capacity, machining accuracy and operation stability of the worktable. Among them, the static pressure guide rail supporting the worktable is one of the key devices in large-scale numerical control equipment. The hydrostatic guide rail is to input the lubricating oil with a certain pressure into the oil chamber of the guide rail surface through the throttle to form a bearing oil film, so that the guide rail surfaces are in a pure liquid friction state. [0003] The use of sloped oil pads in the static pressure circular guide can properly improve the bearing capacity of the static pressure beari...

AI Technical Summary

Problems solved by technology

[0003] The use of sloped oil pads in the static pressure circular guide can properly improve the bearing capacity of the static pressure bearing, but when the shear flow of the static pressure circular guide is greater than the differential pressure flow, there will be a problem of thermal influence between adjacent oil pads , the current hydrostatic circular guide rail oil supply equipment does not consider the problem of thermal influence, and the temperature of its oil supply is constant. When the turntable rotates faster, the thermal influence between adjacent oil pads will be more serious, which will lead to lubrication problems. Failure directly affects the machining accuracy of parts

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