High-speed high-accuracy electric spindle based on spindle core heat pipe cooling

Abstract

The invention provides a high-speed high-accuracy electric spindle based on spindle core heat pipe cooling. The high-speed high-accuracy electric spindle comprises an electric spindle core, the front end of the electric spindle core is fixed to a front bearing assembly, the rear end of the electric spindle core is fixed to a rear bearing assembly, the front bearing assembly is connected with the front end of an electric spindle shell, the interior of the electric spindle shell is connected with an electric spindle stator and the rear bearing assembly, the rear end of the electric spindle shell is connected with a rear cover of a cooling cavity, a cooling cavity is formed by the rear bearing assembly and the rear cover of the cooling cavity , the tail end of the electric spindle core stretches deeply into the cooling cavity, the electric spindle core is provided with a spindle core cooling slot channel and sleeved with an electric spindle core sleeve, the tail end of the electric spindle core is connected with a sealing valve, and a clearance exists between the inner surface of the work segment of the middle of the electric spindle core sleeve and the outer surface of the electric spindle core. According to the high-speed high-accuracy electric spindle, efficient outputting of heat generated by the rotor part of the electric spindle is achieved through the phase change process of work media in the spindle core cooling slot channel and the clearance, the temperature of a spindle rotor is controlled, and machining accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of cooling of a high-speed and high-precision electric spindle, in particular to a high-speed and high-precision electric spindle based on shaft core heat pipe cooling. Background technique [0002] As the core component of high-speed and high-precision machine tools, the electric spindle is the key equipment for high-speed and high-precision machining. However, due to the limitations of structural factors such as the built-in electric spindle motor and the closed shell, the heat generated by the motor and the front and rear bearings cannot be exported in a timely and effective manner, thus forming a complex temperature field inside the electric spindle, causing thermal deformation of each component, resulting in its The size and the relative position between the components change, which in turn affects the machining accuracy of the spindle. According to statistics, in precision machining, the proportion of...

AI Technical Summary

Problems solved by technology

However, the problem of "high-pressure dynamic sealing" is involved in the implementation process. With the increase of the speed, the cooling cost increases sharply, and the system reliability also decreases sharply, which seriously restricts the popularization and application of this method.

Images