Ventilating channel structure on rotor of high-speed motor

Abstract

The invention discloses a ventilating channel structure on a rotor of a high-speed motor. The ventilating channel structure comprises a rotor core, ventilating trough plates and a plurality of ventilating through vanes, wherein the rotor core is formed by overlapping a plurality of groups of rotor punching plates; each ventilating trough plate is arranged between every two adjacent groups of rotor punching plates; the plurality of ventilating trough vanes are fixed on the ventilating trough plates; a plurality of teeth are placed on the external circular surfaces of the ventilating trough plates; a connecting convex bubble and a pair of positioning flanges are respectively arranged on the surface, connected with each ventilating trough vane, of each ventilating trough plate and on the center line of each tooth; a connecting gap corresponding to each connecting convex bubble on each ventilating trough plate is formed on the side surface, connected with each ventilating trough plate, of each ventilating trough vane; and the ventilating trough vanes are clamped between the pair of positioning flanges, then buckled to the connecting bubbles on the ventilating trough plates through the connecting gaps, and finally fixed on the ventilating through plates in a spot welding way. By adopting the ventilating channel structure on the rotor of the high-speed motor, the risk that the ventilating trough vanes are thrown out of the rotor core can be effectively eliminated, and thereby the safety of the motor in running is greatly improved.

Description

technical field [0001] The invention relates to an air channel structure on the rotor of a high-speed motor. Background technique [0002] The rotor of a high-speed motor includes a rotor stamping 10 laminated with a rotor core 1 , a rotor shaft 12 at the center of the rotor core 1 , and rotor pressure rings 11 at both ends of the rotor core 1 . Usually, when the rotor core 1 is laminated, the rotor punches 10 are divided into several groups, and air passages 2 are provided between every adjacent two groups of rotor punches 10 (see figure 1 ), when the motor is running, the heat generated by the motor is transferred out through these air passages 2, so that the temperature rise of the motor is controlled within a safe operating range. Usually, the ventilation channel is composed of a ventilation slot plate 21 and a ventilation slot plate 22. The shape of the ventilation slot plate 21 is similar to that of the rotor punch 10. Tooth 20 ((see figure 2 ); ventilation slots 2...

AI Technical Summary

Problems solved by technology

Because there is no positioning function on the ventilation slot plate 21, the ventilation slot plate 22 is easy to deviate from the center line 200 of the tooth. If it is an asynchronous motor used for 2-pole 60Hz high-speed rotation, the ventilation slot plate and the ventilation slot plate adopt the above-mentioned fixing method. When the motor rotates at a speed of up to 3600 (rev / min), due to too much centrifugal force, there is a risk that the ventilation slots will fly out of the rotor core, which will affect the safe operation performance of the motor

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