Sufficient cooling and sealing structure of electric spindle

Abstract

The invention provides a sufficient cooling and sealing structure of an electric spindle. A stator spiral fluid channel is cut on the outer cylinder face of a cylindrical shell of a motor stator; theouter sides of the two ends of the stator spiral fluid channel, namely the combination face of the shaft end of the cylindrical shell of the motor stator and the shaft end of a stator water jacket achieves double radial sealing of the water cooling shaft end of the motor stator through first radial limiting grooves, first sealing rings in the first radial limiting grooves, second radial limiting grooves parallel to the first radial limiting grooves and second sealing rings in the second radial limiting grooves; and radial water leaking grooves which are parallel to the first radial limiting grooves and the second radial limiting grooves and are spaced with the first radial limiting grooves and the second radial limiting grooves by a certain distance are manufactured between the first radial limiting grooves and the second radial limiting grooves for double radial sealing of the shaft end of the motor stator. The sufficient cooling and sealing structure is compact in structure, superior in cooling and dust isolation effect and good in sealing; cooling liquid obtained after leakage of a sealing ring can be discharged out of an electric spindle shell in time; the overall frequency ofthe electric spindle is reduced while heat generated by high-speed rotation of the electric spindle is sufficiently brought away; and the service life of the electric spindle is prolonged.

Description

technical field [0001] The invention belongs to the technical field of electric spindle cooling, and in particular relates to a sufficient cooling and sealing structure for an electric spindle. Background technique [0002] At present, the electric spindle is a new technology that integrates the machine tool spindle and the spindle motor in the field of CNC machine tools. It has the advantages of compact structure, light weight, small inertia, low noise and fast response. However, since the electric spindle integrates the motor into the spindle unit, the motor is built-in, the casing is closed, and the speed is very high, the heat generated by the power loss of the motor and the heat generated by the friction of the front and rear bearings cannot be discharged in time, resulting in the formation of complex internal electric spindle. The temperature field makes the thermal and dynamic characteristics of the electric spindle worse, thus affecting the normal operation of the e...

AI Technical Summary

Problems solved by technology

Under the existing technology, the problems in the design of the cooling structure of the electric spindle are: 1. The cooling groove in the stator water jacket is designed as a linear through groove along the axial direction of the stator; the cooling area is limited; the cooling effect is not good; 3. Between the motor stator water jacket and the motor stator, a seal ring is used at the end of the motor stator shaft to achieve sealing; dustproof and cooling seals rely on a seal ring; once worn, the seal and waterproof The dust effect is affected at the same time; the frequency of fault maintenance is increased; the cooling and sealing effects need to be improved and improved

Images