A Centrifugal Pump Containing a Rotor Integrated Vane Axial Flux Permanent Magnet Motor

Abstract

The invention discloses a centrifugal pump containing a rotor integrated vane axial flux permanent magnet motor. The centrifugal pump includes a machine shell and an axial flux permanent magnet synchronous motor installed in the machine shell. The machine shell includes a stator machine shell and a rotor machine shell, and the axial flux permanent magnet motor includes a stator and a rotor. The stator includes a stator core and a coil, and the rotor includes a rotor yoke, a bushing and a permanent magnet. The rotor constitutes an impeller of the centrifugal pump simultaneously. The permanent magnet is embedded in the bushing in an interference-fit mode and serves as a single vane of the centrifugal pump impeller. During operation, a stator winding is energized to generate a rotating magnetic field which interacts with the permanent magnetic field on the impeller to drive the impeller to rotate. During the process, a fluid medium flows through a flow channel between the vanes, and the pressure is increased. The centrifugal pump has the advantages of small axial size, small number of parts, and high power density. Meanwhile, the fluid medium is used to cool heat generating parts of the motor to ensure that the centrifugal pump can be used in extreme environments. The problem of wind noise caused by the thin-walled vanes of traditional centrifugal pumps is further solved.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to a centrifugal pump with a rotor-integrated vane axial flux permanent magnet motor, which belongs to the technical field of motors and fluid machinery. Background technique [0002] With the continuous acceleration of the electrification process of vehicles, the use of electric drive in vehicle subsystems has gradually become the mainstream. Among them, motor-driven pump and fan systems account for a large proportion. In order to increase the cruising range, electric vehicles require each subsystem to have a high power density, and at the same time, it should operate stably when the ambient temperature changes greatly. At the same time, the overall reliability index of the vehicle is higher, and reducing the number of components in each subsystem is an important direction to improve reliability, reduce assembly workload and labor costs. [0003] Secondly, electric vehicles require the drivi...

AI Technical Summary

Problems solved by technology

The system volume of these two fixing methods is large, especially the axial dimension, which is not easy to install in electric vehicles

Larger volume reduces power density and efficiency of pump and fan systems

At the same time, there are many system components, the sealing is difficult, and the reliability is reduced

On the other hand, the torque pulsation of the drive motor in the existing pumps and fans is relatively large, and the vibration and noise problems caused by this are difficult to solve

When the vibration of the motor is transmitted to the impeller, it will further increase the wind noise generated by the impeller

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