an electric pump

Abstract

The invention discloses an electric pump, which comprises a pump body and a motor, wherein the motor comprises a rotating shaft, an inner cavity of the motor and a motor unit contained in the inner cavity of the motor; the motor unit comprises an inner stator and an outer rotor, the outer rotor comprises magnetic steel and a support, the support is a cylinder provided with a center hole, and the center hole of the cylinder upwards protrudes to form a convex ring; the cylinder covers the inner stator, the magnetic steel is arranged between the inner ring wall of the cylinder and the outer sidewall of the inner stator, and the magnetic steel is fixedly connected to the inner ring wall of the cylinder; the convex ring tightly covers the rotating shaft. The electric pump adopts the outer rotor structure and the inner stator structure and has the advantages of small volume, light weight, high efficiency, energy saving and capabilities of greatly reducing the material cost and the volume of the electric pump.

Description

technical field [0001] In particular, the invention relates to an electric pump. Background technique [0002] Traditional electric pumps such as figure 1 As shown, it includes a pump body 1' and a motor 2', and the motor 2' part includes a front end cover 24', a rear end cover 25', a rotating shaft 21', an outer stator 231' and an inner rotor 232'; the part of the motor 2' is an outer An asynchronous motor with a stator 231 and an inner rotor 232' structure. [0003] However, the structure of the outer stator and inner rotor of the existing permanent magnet motor, the magnetization method of the magnet steel and the formed magnetic force lines are as follows: figure 2 As shown, the magnetic force lines form a loop through the rotor yoke. In order to ensure the performance of the motor, it is necessary to use materials with good magnetic permeability to process the rotor yoke, so the rotor yoke has a certain thickness and uses a lot of materials. [0004] The existing el...

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Problems solved by technology

[0003] However, the structure of the outer stator and inner rotor of the existing permanent magnet motor, the magnetization method of the magnet steel and the formed magnetic force lines are as follows: figure 2 As shown, the magnetic field lines form a loop through the rotor yoke. In order to ensure the performance of the motor, it is necessary to use materials with good magnetic permeability to process the rotor yoke. Therefore, the rotor yoke has a certain thickness and uses more materials.

[0004] The existing electric pumps all install rotating fan blades on the non-driving end of the motor 2' to supply air to the base to dissipate heat. The electric pump motor 2' of this structure is bulky and heavy; and the traditional electric pump base 11' The motor and the 2' front end cover are two independent parts, and the whole electric pump is extremely bulky

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