An axial supporting structure for press-fitting of an impeller for a motor

Abstract

The invention discloses an axial supporting structure for press-fitting of an impeller for a motor. The structure comprises a motor assembly; the bottom of the motor assembly is equipped with a rear end cover; a motor shaft is arranged at an axial center of the motor assembly; and a surface of the motor shaft is provided with a rotor coil; a first ball bearing sleeves one end of the surface of themotor shaft; a second ball bearing sleeves the other end of the surface of the motor shaft; the second ball bearing is supported on a stepped surface inside the rear end cover; the bottom of the rearend cover is provided with a bottom flange cover; a bottom cover of the bottom flange cover is a flat structure; and the axis portion of the surface of the bottom cover is provided with a protrusion;the shape of the protrusion is cylindrical; the axis of the protrusion is the same as the axis of the motor shaft; and the periphery of the protrusion is provided with a concave ring which is conductive to plastic deformation of the bottom cover when the impeller is press-fitted. Through design of the flange bottom cover, the support for the shaft end in the impeller press-fitting process can beincreased, thereby effectively avoiding the damage to an internal bearing of the motor. The invention is a very good innovative scheme, and has a market popularization prospect.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an axial support structure for press-fitted impellers of a motor and a method for using the same. Background technique [0002] A motor is a device that converts electrical energy into mechanical energy. It uses energized coils to generate a rotating magnetic field and acts on the rotor to form a magnetoelectric force rotating torque. Motors are divided into DC motors and AC motors according to the different power sources used. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors. The motor is mainly composed of a stator and a rotor. The direction of the current-carrying wire in the magnetic field is related to the direction of the current and the direction of the magnetic field line (magnetic field direction). The working principle of the motor is that the magnetic field acts on the force of the current to make the motor r...

AI Technical Summary

Problems solved by technology

[0003] The blower will generate a certain pressure in the axial direction during the process of press-fitting the impeller. For motors using ball bearings, this axial pressure will cause the internal balls of the ball bearings to wear, so that after the press-fitting impeller is installed, the motor In the actual operation, the bearing will produce a series of problems such as noise, and even affect the service life of the bearing. There are deficiencies and cannot meet the needs of social development.

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