Motor fan impeller

Abstract

The invention discloses a motor fan impeller which comprises a front cover plate and a rear cover plate which are sequentially arranged in the axial direction. A hub is fixedly arranged between the front cover plate and the rear cover plate, and a plurality of blades are sequentially and fixedly arranged on the hub in the circumferential direction. An air inlet is formed in the center of the front cover plate, and an air outlet channel is formed between every two adjacent blades, so that air can enter through the air inlet in the axial direction and then flow out through the air outlet channels in the radial direction. In the airflow direction, each blade sequentially comprises an inlet structure and an outlet structure; each inlet structure is of a plane symmetrical structure, and the symmetrical plane is the plane where the rotating center line of the hub is located; and in each outlet structure, at least part of the circumferential end face is a deformation face, and the deformation face gradually deviates from the corresponding symmetrical plane in the airflow direction. Due to the fact that the deformation faces are arranged on the outlet structures, compared with straight blades in the prior art, the circumferential expansion trend of airflow channels can be slowed down, and the through-flow efficiency of a fan can be improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor fan impeller. Background technique [0002] Self-ventilated double-rotating motors usually use a self-ventilating fan that rotates coaxially with the motor to drive the air flow in the frame to enhance the convective heat dissipation effect between the air in the frame and the stator and rotor of the motor, and improve the overall cooling efficiency of the motor. Self-ventilating fans usually have the airflow characteristics of axial air inlet and radial air outlet, mainly relying on the work of fan blades and centrifugal force to achieve the purpose of boosting air and driving air flow, so this kind of fan is a centrifugal fan. A type of fan. [0003] Different from the traditional centrifugal fan, the installation angle of the self-ventilating double-rotation motor centrifugal fan blade is zero, which is to ensure that the ventilation effect of the fan is exactly the sa...

AI Technical Summary

Problems solved by technology

At the same time, the radial arrangement of the fan blades makes the shape of the end surface of the fan flow channel obvious, such as figure 1 The air inlet shown is narrow, the air outlet is wide, and the gas flow path gradually widens from the inlet to the outlet at a constant speed, which also causes the wall adhesion between the gas and the blade to gradually deteriorate with the airflow movement, and the outlet Generally, obvious air separation and outlet recirculation area will be formed nearby, which will cause outlet blockage and affect fan flow efficiency

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