Motor air cooling structure and horizontal motor

Abstract

The invention provides a motor air cooling structure. An air gap between a stator and a rotor is a wedge-shaped one, a small port of the wedge-shaped air gap is arranged at the low temperature side of the rotor, and a big port of the wedge-shaped air gap is arranged at the high temperature side of the rotor. By adopting the motor air cooling structure provided by the invention, the wedge-shaped air gap is formed between the stator and the rotor, cooling temperature uniformity and cooling efficiency of the stator and the rotor are improved, and structure is simple. Besides, the invention provides a horizontal motor with the air cooling structure, and the horizontal motor has higher work efficiency and work stability compared with a motor with an air cooling structure in the prior art.

Description

technical field [0001] The invention relates to the technical field of motor cooling, in particular to a motor wind cooling structure. In addition, the present invention also relates to a horizontal motor with the above air cooling structure. Background technique [0002] The development of electric motors has driven mankind into the era of electrification. After a hundred years of development, electric motors have been widely used in industrial and agricultural production, transportation, national defense, commercial and household appliances, and medical electrical equipment. The motor mainly includes a stator (stationary part), a rotor (rotating part), and an intermediate space (air gap) between the stator and the rotor. The rotor rotates at a high speed relative to the stator used to generate a magnetic field, forming an electromagnetic torque on the rotary shaft, and then Drive the drive equipment connected to the rotary shaft to move, and the air gap is the path of the...

AI Technical Summary

Problems solved by technology

[0006] In the above cooling system, when the motor is running, there is a temperature difference between the inner surface of the stator and the outer surface of the rotor, and the fluid particles in the air gap will move relative to each other under the action of buoyancy, and flow radially from the high temperature surface to the low temperature surface. Surface, that is to produce natural convection, this natural convection is only heat exchange between components, for the wind cooling method in which axial through holes are set in the front bearing cover and rear end cover in the prior art, it will affect the axial flow of cold air Direct flow, resulting in uneven cooling temperature, affecting the cooling effect

In the prior art, the air gap of the motor is only used as a magnetic field path and does not belong to the cooling structure of the motor. The stator and rotor completely rely on the cooling system to achieve cooling purposes. There are local blind areas for the cooling of the stator and rotor ends, and the temperature is uneven. The cooling efficiency is low, and problems such as broken bars of the rotor bars often occur

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