Novel hydrostatic pressure thrust bearing device

Abstract

The invention belongs to the field of bearings, and particularly discloses a novel hydrostatic pressure thrust bearing device. The novel hydrostatic pressure thrust bearing device comprises a rotary workbench, a thrust bearing and a main shaft mechanism, wherein the rotary workbench is horizontally arranged on the upper surface of the thrust bearing and fixedly connected with a main shaft; the thrust bearing is provided with an annular oil cavity, an oil return groove, an oil supply hole which is in communication with the annular oil cavity, and an oil return hole which is in communication with the oil return groove; the main shaft mechanism comprises the main shaft and a cross rolling coupling; the main shaft penetrates the thrust bearing and is matched with the thrust bearing through twoparallel cylindrical roller bearings; the upper end of the main shaft is connected with the rotary workbench, and the lower end of the main shaft is connected with the cross rolling coupling; the cross rolling coupling comprises an upper transmission seat, a lower transmission seat and a transmission disc positioned between the upper transmission seat and the lower transmission seat; and the transmission disc is in sliding fit with the upper transmission seat and the lower transmission seat through four roller cam guide apparatuses which are distributed on the upper surface and the lower surface of the transmission disc in a cross manner. The novel hydrostatic pressure thrust bearing device has the advantages of being high in rotation precision, small in friction coefficient and good in stability.

Description

technical field [0001] The invention belongs to the field of bearings, and more specifically relates to a novel hydrostatic thrust bearing device. Background technique [0002] In recent years, hydrostatic bearings have become the main structural form of motion bearing systems for high-end manufacturing equipment. The hydrostatic bearing kinematic pair is a sliding bearing kinematic pair that supports the load by means of the hydrostatic pressure input between the supporting working surfaces. Due to the condition of pure fluid lubrication during the movement, the friction coefficient between the moving parts is extremely small, so it has good supporting characteristics. [0003] Under heavy load conditions, the temperature of the oil film of the hydrostatic thrust bearing will increase with the increase of the rotating speed of the table, and at the same time, the hydrostatic bearing will be deformed and the characteristics of the oil film will be reduced. Patent CN2013102...

AI Technical Summary

Problems solved by technology

However, this patent does not consider the change of oil film thickness and the influence of temperature rise effect on the bearing support characteristics, it is difficult to realize the adjustment of oil film thickness, and it is difficult to ensure the support performance of the bearing, and the rotation accuracy is low

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