Electric motor used for wet-type operation pump and assembly method

Abstract

The invention relates to an electric motor used for a pump, in particular to an electric motor used for a wet-type operation pump. The electric motor used for the wet-type operation pump comprises a stator 1, a casing pipe 2 and a rotor 3 which is combined with a rotating shaft 4 into a whole, wherein one end of the rotating shaft 4 is used as an energy output end of the electric motor, and the casing pipe 2 is located between the stator 1 and the rotor 3. The rotor 3 is located in the casing pipe 2, and the casing pipe 2 enables the space of the rotor 3 to be sealed relative to the space of the stator 1. The stator 1 and the casing pipe 2 are in an integrated seamless-connection structure. According to the assembly method of the electric motor used for the wet-type operation pump, the casing pipe 2 is directly molded on the stator 1 in an injection mode with injection molding technology adopted, and then the rotor 3 is arranged in the casing pipe 2. According to the electric motor used for the wet-type operation pump and the assembly method, on the premise of ensuring the strength of the casing pipe, an air gap between the stator and the rotor is effectively reduced, and the operation efficiency of the electric motor used for the wet-type operation pump is improved. Besides, the manufacturing technology is simple, and the cost is low.

Description

[0001] This application is a divisional application of the applicant's original application. The application date of the original application is September 9, 2011, the application number is 201110267300.2, and the title of the invention is "a motor and assembly method for a wet-running pump". technical field [0002] The invention relates to a motor for a pump, in particular to a motor for a wet-running pump, and also relates to an assembly method for the motor for a wet-running pump. Background technique [0003] The pump is a machine that transports fluid or pressurizes the fluid. Its working principle is to transmit the mechanical energy generated by the pump motor or other external energy to the fluid to increase the energy of the fluid. It is mainly used to transport fluids including water, oil, acid and alkali, Emulsions, suspensions, and liquid metals, etc. Pump motors generally include dry-running pump motors and wet-running pump motors. The dry-running pump motor r...

AI Technical Summary

Problems solved by technology

Although this structure reduces the air gap between the stator and the rotor to a certain extent and improves the magnetic force between the stator and the rotor, the preparation process of the sleeve is complicated and the cost is high. When the magnetic strip made in the direction is soaked in a high temperature transport fluid for a long time, due to the temperature characteristics of the plastic material, it is easy to produce a gap caused by cold shrinkage, and there is a risk that the fluid will infiltrate into the stator and cause damage to the motor

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