Motor with cooling circulation function, pump assembly and motor shaft

Abstract

The invention provides a motor with a cooling circulation function, and the motor comprises a motor shaft, a stator, a shielding part which is disposed between the motor shaft and the stator, and a housing which has a length extending in the axial direction, limits the internal space of the motor, and separates the internal space of the motor from the external environment. The motor shaft comprises a channel located in the motor shaft, a first through hole and a second through hole, the first through hole and the second through hole are formed in the wall of the motor shaft and axially spaced from each other, and the channel is in fluid communication with the inner space of the motor through the first through hole and the second through hole. The shell comprises a third through hole and a fourth through hole which are formed in the wall of the shell and are axially spaced from each other, and the internal space of the motor is in fluid communication with the external environment through the third through hole and the fourth through hole. The invention further provides a pump assembly and a motor shaft of the motor with the cooling circulation function.

Description

technical field [0001] The present application relates to a motor, in particular to a motor with a cooling cycle function; in addition, to a pump assembly including such a motor with a cooling cycle function, for example, a deep well pump assembly including a multi-stage pump unit. Background technique [0002] Pump assemblies, such as deep well pump assemblies, generally include two main parts: at least one pump for transporting a working medium (typically a fluid such as water) from one location to another; and for supplying pump components powered motor. [0003] During the working process, on the one hand, the motor generates a lot of heat. Excessive high temperature will greatly shorten the service life of the motor, and may even be damaged by sudden burning during a certain use; on the other hand, the motor sliding bearing will also generate a certain amount of heat in the case of continuous operation, which will affect the use of the sliding bearing. life, so this h...

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Problems solved by technology

[0006] However, the cooling device related to the motor disclosed in the prior art is complex in design and cumbersome in structure, which is too heavy for the pump assembly, especially the miniaturized deep well pump assembly, which increases the difficulty of installation and construction on the one hand. Economical costs, on the other hand are often prone to breakdowns, leading to inconveniences

[0007] In addition, the lubrication problem of the motor sliding bearing has not been completely solved, and it is expected to design a motor structure to at least further solve this problem

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