Water-cooled motor casing double-cooling-circuit structure

Abstract

The invention relates to a water-cooled motor casing double-cooling return circuit structure, a water-cooled cooling circuit is arranged in the inner layer of a motor casing, the water-cooled cooling circuit is composed of a water-cooled return circuit outer wall, a water-cooled return circuit inner wall and a second reinforcing rib, the water-cooled return circuit inner wall is arranged inside the water-cooled return circuit outer wall, a cooling water groove is formed between the water-cooled return circuit outer wall and the water-cooled return circuit inner wall, the cooling water groove is communicated with a water nozzle, an air-cooled cooling circuit is arranged in the outer layer of the motor casing, the air-cooled cooling circuit is composed of the water-cooled return circuit outer wall, the motor casing outer wall and a first reinforcing rib, the motor casing outer wall is arranged outside the water-cooled return circuit outer wall, aluminum alloy is squeezed to form a cantilever vent hole which is formed between the motor casing outer wall and the water-cooled return circuit outer wall, and a fan is arranged at one end of a rotor. An air-cooled and water-cooled double-cooling return circuit is arranged in the motor casing, air inside a motor is made to flow, heat of the rotor is transmitted to a water-cooled structural part through air flowing and taken away through cooling water of the water-cooled cooling circuit, heat dissipation capacity and cooling cability of the motor are improved, and loading ability of the motor is increased.

Description

technical field [0001] The invention belongs to the field of motor manufacturing, and relates to a double cooling circuit structure of a water-cooled motor shell, which is especially suitable for the production of special motor cooling shells. Background technique [0002] Existing water-cooled motors generally cool the motor by setting an S-shaped or spiral waterway structure in the casing, so that the cooling effect of the stator part of the motor is better, while the rotor part has a large thermal resistance due to the lack of air flow inside the motor and heat It is difficult to take away the cooling water through air conduction, so the temperature rise of the rotor will be much higher than that of the stator, which limits the increase in the load capacity of the motor. Generally, the cooling structure of the water-cooled motor casing is that there is only a single water-cooling cooling structure in the motor casing, and the heat of the stator is directly conducted to th...

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Problems solved by technology

[0002] Existing water-cooled motors generally cool the motor by setting an S-shaped or spiral waterway structure in the casing, so that the cooling effect of the stator part of the motor is better, while the rotor part has a large thermal resistance due to the lack of air flow inside the motor and heat It is difficult to take away the cooling water through air conduction, so the temperature rise of the rotor will be much higher than that of the stator, which limits the increase in the load capacity of the motor

Generally, the cooling structure of the water-cooled motor casing is that there is only a single water-cooling cooling structure in the motor casing. The heat of the stator is directly conducted to the cooling water through the inner wall of the water-cooling circuit, and a better cooling effect is achieved. However, since the air in the motor basically does not flow at this time, The air thermal resistance is very large, and it is difficult for the heat of the rotor to be transferred to the structural part of the water cooling circuit through the air, which limits the load capacity of the motor

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