Temperature rise control method for inclined surface oil pads of static pressure circular guide rail

Abstract

The invention provides a temperature rise control method for inclined surface oil pads of a static pressure circular guide rail. The temperature rise control method for the inclined surface oil pads of the static pressure circular guide rail comprises the following steps of determining a region generating periodic thermal influence according to a flow mechanism of an oil film of gaps between the adjacent oil pads on the static pressure circular guide rail; acquiring periodic thermal influence parameters of the static pressure circular guide rail, and calculating the periodic thermal influencecoefficient of the inclined surface oil pads of the static pressure circular guide rail in the region generating periodic thermal influence; then establishing an oil pad temperature rise control equation, calculating the temperature rise of the oil film of the inclined surface oil pads of the static pressure circular guide rail, and establishing an oil film temperature rise model of the inclined surface oil pads of the static pressure circular guide rail; and finally adjusting the oil supply temperature of a hydraulic system of the static pressure circular guide rail according to the oil filmtemperature rise model of the inclined surface oil pads of the static pressure circular guide rail. The temperature rise control method for the inclined surface oil pads of the static pressure circular guide rail is used for improving the machining performance and the running precision of a thrust bearing of the static pressure circular guide rail.

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...

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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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