Built-in air cooling structure of motor

Abstract

The invention discloses a built-in air cooling structure of a motor. The built-in air cooling structure comprises an axial ventilating structure and radial ventilating structures, wherein axial ventilating structure and radial ventilating structures are communicated with each other and arranged in the motor. The axial air ventilating structure is composed of a stator and a rotor which are installed in a casing, the radial air ventilating structures are respectively arranged in the end covers at two ends of the casing, the end covers are double-flange components, the middle of the inner end face of the outer flange axially protrudes toward the side of the inner flange to form a bearing base, the inner flange is an annular component, and the outer flange is axially and integrally connected with the inner flange through the middle bearing base and a radial rib plate connected on the outer wall of the bearing base; and an air guiding casing is axially connected on the inner end face of the inner flange at the front end cover of the motor. The air guiding casing inhales cold air from the front end cover to cool the front end bearing, the stator, the rotor, the casing and the rear end bearing, and the air can flow out from the rear end cover. The built-in air cooling structure of the motor is large in ventilating section, large in ventilation quantity and good in cooling effect, particularly can effectively cool the front end bearing and can serve as a large-power motor air cooling structure.

Description

technical field [0001] The invention relates to a motor cooling structure, in particular to a motor air cooling structure. Background technique [0002] Ordinary motors generate a certain amount of heat during operation. If the heat cannot be discharged in time, it will accumulate and become harmful until it affects the service life of the motor. The existing technology has adopted cooling measures. Its structure is that the front and rear end covers of the motor are provided with axial through holes, and the inner end surface of the rear end cover is axially connected with a wind guide cover. The frustum-shaped wind guide cover has a siphon The function is to suck the external cold air into the motor from the ventilation hole set on the rear end cover wall, and the flow direction of the cold air is from the rear end to the front end until it flows out from the ventilation hole set on the front end cover wall. Take part of the heat to play a cooling effect. However, in the...

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Problems solved by technology

However, in the prior art, less cold air enters the motor, the flow speed is not fast, the heat taken away is limited, and the cooling effect is limited. For the motor with a large calorific value, the existing technology cannot meet the cooling requirements

[0003] There is a motor output shaft end at the front end bearing, and its load is greater than that of the rear end bearing, so its calorific value is greater than that of the rear end bearing. However, the air-cooled structure of the prior art can sufficiently cool the rear end bearing with a relatively small calorific value, while the air cooling structure of the prior art The cooling of the front-end bearing with relatively large heat is not enough, and the front-end bearing is prone to overheating damage due to insufficient cooling

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