The direction of the cooling air flowing in the motor, […]
The direction of the cooling air flowing in the motor, the air cooling system can be divided into three types: radial, axial and mixed (diameter, axial); the radial ventilation system facilitates the use of components on the rotor that can generate wind pressure, thus obtaining A wide range of applications. The axial ventilation system facilitates the installation of larger diameter fans for increased ventilation. The main disadvantage is that the cooling is uneven in the axial direction and it is not convenient to utilize the blasting action of the upper parts of the rotor. The axial ventilation system is generally only used in small and medium-sized DC motors in China.
In fact, the so-called radial or axial ventilation system is only a major aspect of the cooling effect of the cooling medium in the motor, and a purely radial or axial ventilation system is relatively rare. Hybrid ventilation systems have both axial and radial channels, but tend to be more of a type. Large DC motors are mostly axial-based hybrid systems, and radial-based hybrid systems are widely used in turbo generators.
According to the cooling air is first passed through the heating part of the motor, then through the fan, or vice versa, the system using air cooling can be divided into two types: suction type and press-in type.