Water-lubricated spiral groove bearing heating power calculation method and electric spindle thermal design method

Abstract

The invention provides a thermal design method for a high-speed water-lubricated dynamic pressure spiral groove bearing motorized spindle. The thermal design method comprises the following steps that 1, the heating power of a main heat source of the high-speed water-lubricated dynamic pressure spiral groove bearing motorized spindle and the heat exchange coefficient of each heat exchange surface are calculated; step 2, establishing a thermodynamic model of the high-speed water-lubricated dynamic-pressure spiral groove bearing motorized spindle, and performing performance analysis; and 3, determining design parameters of the high-speed water-lubricated dynamic-pressure spiral groove bearing electric spindle according to a performance analysis result in the step 2. According to the thermodynamic modeling and thermal design method for the high-speed water-lubricated dynamic pressure spiral groove bearing motorized spindle structure, an effective means is provided for thermodynamic modeling and thermal state design of the high-speed water-lubricated dynamic pressure spiral groove bearing motorized spindle structure, forward design of the motorized spindle is facilitated, the one-time design success rate is increased, and the design efficiency is improved. The design period is shortened.

Description

technical field [0001] The invention relates to a high-speed water-lubricated dynamic pressure spiral groove bearing electric spindle thermodynamic modeling and thermal design technology, which belongs to the field of numerical control machine tool design. Background technique [0002] The water-lubricated bearing motorized spindle has outstanding advantages such as high rotation accuracy, long life, and good thermal stability, and is one of the research hotspots in the field of high-speed machining tools. It should be noted that water-lubricated hydrostatic bearing electric spindles rely on expensive high-pressure water supply equipment, which seriously restricts the engineering application of this type of electric spindles in the field of machine tools. The water-lubricated dynamic pressure spiral groove bearing does not require high-pressure water supply equipment, has a simple structure and low cost; in addition, compared with ordinary water-lubricated dynamic pressure b...

AI Technical Summary

Problems solved by technology

The calculation of the heating power of the water film of the spiral groove bearing under high-speed working conditions needs to consider the influence of shear and pressure difference at the same time; in addition, the spiral groove of the spiral groove bearing is herringbone and logarithmic Calculation of power consumption and temperature rise brings difficulties

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