High-power Electric Spindle Rotor Inner Heat Pipe Cooling Device for Aeronautical Component Processing

Abstract

The invention provides a high-power electric spindle rotor internal heat pipe cooling device for machining aviation components, including a broach rod located in the electric spindle, an inner fluid channel shaft, an annular internal heat pipe body, a tie rod press block heat pipe cooling assembly, and an internal cooling Rotary joint; a sealed cavity is formed between the shaft core and the annular inner heat pipe body, and a plurality of capillary grooves are arranged along the outer wall of the annular inner heat pipe and the inner wall of the shaft core, the sealed cavity is evacuated, and low-temperature heat pipe medium is injected into the sealed cavity , the shaft core and the annular inner heat pipe body constitute an annular heat pipe; the two ends of the inner fluid channel shaft are respectively placed in the inner cavity of the inner cooling rotary joint and the inner cavity of the broach bar; the inner cooling rotary joint, the inner fluid channel shaft, the drawing rod Cooling passages are set on the cutter bar and the heat pipe cooling assembly of the tie rod pressing block, and the inner wall of the heat pipe cooling assembly of the tie rod pressing block is provided with a cooling groove; heat-conducting glue is added between the joint surface of the heat pipe cooling assembly of the tie rod pressing block and the annular inner heat pipe body. The invention can realize stable cooling inside the shaft core.

Description

technical field [0001] The invention belongs to the technical field of aviation component processing, and in particular relates to a high-power electric spindle rotor internal heat pipe cooling device for processing aviation components. Background technique [0002] The machining allowance of the existing aerospace structural parts is particularly large, and the allowance even reaches more than 80% of the material; the power of the spindle is high, the speed is high, the heat generated during the processing is large, and the cutting efficiency is high. Especially for the rare earth permanent magnet synchronous electric spindle, the shaft core and the motor rotor are integrated, and the temperature rise of the rotor will cause the thermal elongation of the spindle and affect the machining accuracy. The existing method of cooling the electric spindle is mainly to cool the stator and bearing of the motor, while the cooling of the rotor is a difficult problem in the industry. ...

AI Technical Summary

Problems solved by technology

[0003] Even in the small number of existing cooling methods for the motor rotor, most of them adopt the method of forming a cooling channel outside the shaft core and passing in cooling water for cooling. Although such a cooling method can solve the cooling problem of a small number of motor rotors, However, the rotor of this cooling method must be equipped with a rotor sleeve, which is not suitable for the cooling of the main shaft rotor without a rotor sleeve. More importantly, the cooling of the rotor outside the shaft core is very easy to affect the insulation of the electrical part. At the same time, liquid cooling Unsteady flow of medium and large diameter of external cooling groove of shaft core will affect high-speed dynamic balance performance

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