A Hydrostatic Thrust Bearing Device for Reducing Hot Oil Carryover

Abstract

The invention discloses a hydrostatic thrust bearing device for reducing hot oil carrying. In order to solve the problem of temperature rise of an oil film caused by hot oil carrying between oil padsin a hydrostatic thrust bearing, an oil scraping plate structure easy to remove and change is mounted on a traditional hydrostatic thrust bearing base, and the traditional plane oil scraping surface is changed into a curved oil scraping surface, thus the heat dissipation area of oil liquid and the hot oil scraped by the oil scraping plate are increased, the hot oil carried between two adjacent oilpads is reduced, the temperature rise of the oil liquid is effectively relieved, and thermal deformation of a machine tool is prevented; meanwhile, the circumferential width of the left and right ends of an oil sealing edge of the oil pad is of an asymmetric structure, the side with greater circumferential width inclines downward, then a dynamic pressure is formed by use of a wedge shape betweenthe inclined plane of the oil pad and a rotary table guide rail so as to compensate for the hydrostatic loss of the lubricating oil, thus the rigidity and the bearing capacity of the oil film are improved, the problem of lubrication failure of the hydrostatic thrust bearing is solved, and high-precision and high-efficiency work of the whole machine tool is guaranteed.

Description

technical field [0001] The invention relates to a static pressure thrust bearing device which reduces hot oil carrying, and belongs to the technical field of hydrostatic pressure of heavy-duty static pressure machine tools. Background technique [0002] In recent years, my country's equipment manufacturing industry has developed rapidly. Due to its superiority in reliability, vibration resistance, work efficiency, and machining accuracy, static pressure support technology has been more and more applied to heavy CNC equipment. The in-depth study of hydrostatic thrust bearings promotes the continuous development of heavy-duty machining and manufacturing. The oil film stiffness of the oil pad on the ordinary hydrostatic thrust bearing base is limited. Under the condition of high speed and heavy load, it is easy to cause the temperature of the oil film in the gap to rise, the viscosity of the lubricating oil to decrease, and the thickness of the oil film to become thinner, result...

AI Technical Summary

Problems solved by technology

The oil film stiffness of the oil pad on the ordinary hydrostatic thrust bearing base is limited. Under the condition of high speed and heavy load, it is easy to cause the temperature of the oil film in the gap to rise, the viscosity of the lubricating oil to decrease, and the thickness of the oil film to become thinner, resulting in local oil film rupture and dry friction. , and then the phenomenon of oil film lubrication failure occurs, and the length of machine tool operation life and the level of machining accuracy are determined by the oil film performance of the oil pad on the hydrostatic thrust bearing base

In addition, the increase of the temperature of the oil film in the oil pad will cause thermal deformation of the machine tool and reduce the machining accuracy, which is not allowed in engineering, and part of the reason for the temperature rise of the oil film in the oil pad is often overlooked by people. The effect of oil film hot oil carrying, that is, under a certain speed condition, when the net flow direction of the oil sealing edge on both sides of the circumferential direction of a single oil pad is consistent with the direction of the workbench, no lubricating oil flows out from the oil sealing edge on one side, and the heat will accumulate with the The lubricating oil flows to the other side to seal the oil edge, passes through the oil return tank to the next oil pad, and so on, the heat is continuously carried between the oil pads, causing the heat to be unable to spread and accumulate continuously, eventually leading to an increase in the temperature of the oil film

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