Optimal circumferential inclination angle determination method influencing lubricating performance of static and dynamic pressure oil pad

Abstract

The invention relates to a research on the influence of the circumferential inclination angle of a new static pressure mixing hydrostatic support structure on the lubricating performance under different loads, so as to better realize the dynamic and static pressure mixing lubrication, to achieve the effect of preventing friction failure and ensuring the high speed and heavy static pressure, and high-precision stable operation of high-speed heavy-load hydrostatic bearing is ensured. The methjod comprises: comprehensively considering and analyzing influence of a temperature field, a pressure field and a flow field to obtain the optimal circumferential inclination angle of the oil pad under different extreme working conditions when the lubricating performance is optimal; Under the extreme working conditions of no load and 12t load, through oil film pressure fields with different circumferential inclination angles of the static and dynamic pressure oil pad, temperature fields and flow fields, generating an average temperature curve and an average pressure curve for comparative analysis; obtaining circumferential inclination angle to be 0.002 degrees when the extreme working conditionis no-load, and when the extreme working condition is 12t, and the circumferential inclination angle is 0.0025 degrees, the average temperature of the system being the lowest, the average pressure being the highest, the number of times of shearing oil particles in a flow field being the lowest, and the comprehensive lubricating performance being the best; and finally, analyzing the circumferentialinclination angle under other extreme working conditions when the lubricating property is optimal through the method.

Description

technical field [0001] The invention relates to a study on the influence of the oil pad circumferential inclination angle on the lubrication performance of a new type of static and dynamic pressure mixed static pressure support structure under different loads, so as to better realize the dynamic and static pressure mixed lubrication, achieve the effect of preventing friction failure, and ensure high-speed and heavy-duty lubrication. Loaded static pressure support with high precision and stable operation. Background technique [0002] Due to its many advantages, hydrostatic thrust bearings have become the core components of large-scale numerical control equipment in national key industries such as large-scale machinery, aerospace, ships, and national defense and military industries. With the development of science and technology, the requirements for its bearing capacity and precision are getting higher and higher in the manufacturing process. When the hydrostatic thrust bear...

AI Technical Summary

Problems solved by technology

Under high-speed and heavy-load conditions, the oil film shears and heats up and the supporting oil film is under great pressure. The thickness of the oil film between the workbench and the oil pad becomes thinner, boundary lubrication is formed between the friction pairs, and even direct friction between the workbench and the oil pad occurs. , leading to frequent occurrence of tribological failures

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