Thermodynamic modeling and thermal design method of high-speed dynamic pressure lubrication precision spindle

Abstract

The invention provides a thermodynamic modeling and thermal design method of a high-speed dynamic pressure lubrication precision spindle, which comprises the following steps: step 1, conducting three-dimensional digital modeling of the high-speed dynamic pressure lubrication precision spindle; 2, calculating that heating power of the main heat source of the high-speed dynamic pressure lubricationprecision spindle; 3, calculating that main heat transfer coefficients of the high-speed dynamic pressure lubricate precision spindle; 4, conducting thermodynamic modeling of a high-speed dynamic pressure lubrication precision spindle; 5, calculating sensitivity of parameters of a high-speed dynamic pressure lubricate precision spindle. Through adoption of the thermodynamic design method of the high-speed dynamic pressure lubrication precision spindle structure provided by the invention, the thermodynamic modeling and the thermal state design accuracy of the high-speed dynamic pressure lubrication precision spindle structure can be greatly improved, and the design period can be shortened. The method is not convenient for the forward design of high-speed machining machine, and also improvesthe success rate of one-time design.

Description

technical field [0001] The invention relates to a high-speed dynamic pressure lubrication precision spindle thermodynamic modeling and thermal design technology, which belongs to the field of numerical control machine tool design. Background technique [0002] CNC machine tools are developing in the direction of high speed and high precision, and the industry has higher and higher requirements for the thermal performance of high-speed processing machine tools. High-speed dynamic pressure lubricated precision spindles are widely used in precision grinding processes due to their high rigidity, high stability, and high precision. However, the spindle speed is high, the lubricating oil generates a lot of heat, and the thermal deformation of the spindle system caused by the temperature rise cannot be ignored. Establishing the thermodynamic model of the high-speed dynamic pressure lubrication precision spindle, carrying out the thermodynamic analysis of the spindle and the spindl...

AI Technical Summary

Problems solved by technology

Due to the friction and shearing effect of the oil film, the temperature of the lubricating oil is constantly rising from entering the bearing bush to flowing out, resulting in a continuous decrease in its viscosity, and the inlet temperature of the lubricating oil is determined by the friction power consumption of the bearing and the flow rate of the circulating pump of the lubricating oil , which makes it difficult to calculate the friction loss of the dynamic pressure bearing

So far, there is no complete calculation theory of dynamic pressure bearing friction power consumption at home and abroad, and it is still impossible to establish a thermodynamic model for high-speed dynamic pressure lubrication precision spindles, and talk about the thermal design technology of high-speed dynamic pressure lubrication precision spindles

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