Electric fluid pump and motor stator structure therefor

Abstract

The invention discloses an electric fluid pump and a motor stator structure therefor. The electric fluid pump comprises a pump case, a motor, and an impeller, wherein the motor and the impeller are disposed in the pump case. The impeller is in driving connection with the motor to be driven by the motor to rotate. The pump case is provided with a fluid inlet and a liquid outlet. The motor comprises a stator and a rotor, and an air gap is formed between the stator and the rotor. The stator comprises a stator core, and the stator core comprises a stator yoke and a plurality of tooth parts, wherein the tooth parts extend inwards in the radial direction along the stator yoke. Each tooth part is provided with a winding coil. The tooth parts comprise a plurality of first tooth parts and a plurality of second tooth parts, wherein the first and second tooth parts are alternately arranged in the peripheral direction. The external surface of the stator yoke is provided with flow guide trenches corresponding to the first tooth parts. The shapes of the first tooth part are different from the shapes of the second tooth parts, thereby enabling a magnetic circuit of the stator core to be distributed symmetrically.

Description

technical field [0001] The invention relates to a fluid pump, especially an electric fluid pump and its motor stator structure. Background technique [0002] Electric fluid pumps are widely used in the automotive industry, such as coolant pumps to provide coolant to the engine or fuel pumps to provide fuel to the engine. This type of electric fluid pump generally includes a pump housing, a motor mounted within the pump housing, and an impeller driven by the motor. Fluids such as coolant or fuel are driven by rotating impellers. [0003] The motor is the most critical element in this type of electric fluid pump. Basically, when the car is started, the motor must work all the time, so the motor is required to run stably, have high reliability, and have a long life. The parts most prone to failure in a motor are the bearings that support the rotation of the rotor. If the bearings are excessively worn, the motor will no longer function properly. One of the most important re...

AI Technical Summary

Problems solved by technology

In the actual process, it was found that this caused the radial force of the stator to be unbalanced, resulting in bearing wear, and had a certain impact on the life of the product

[0005] In addition, radial electromagnetic unbalanced forces can also cause excessive noise

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