Submersible pump

Abstract

The invention discloses a submersible pump, comprising a motor and a water pump arranged on the motor, as well as a short shaft in coaxial transmission connection with the power output shaft of the motor and the power input shaft of the water pump, and a hollow housing arranged at the periphery of the power output shaft of the motor, wherein the hollow housing is located on and coaxially and fixedly connected with the motor housing through the housing at the top of the motor and a positioning convex edge which coaxially projects from the power output shaft; an annular lug is arranged in the hollow housing; and a thrust bearing is assembled through ejection between the upper end face of the annular lug and the short shaft. The submersible pump is characterized in that axial force applied to the motor output shaft in the work of the submersible pump is transferred to the hollow housing, and finally borne by the motor housing as the hollow housing is fixedly connected with the motor housing, so that the friction of the bottom thrust disc of the motor with the graphite bearing is reduced and the service life of the motor is prolonged; and a temperature controlled switch arranged beside the winding of the motor is employed to effective prevent the winding of the motor from being burnt down.

Description

technical field [0001] The invention relates to a submersible pump. Background technique [0002] The bottom of the motor used in the existing submersible pump is installed with a thrust plate and a graphite bearing. The thrust plate rotates at high speed with the motor shaft. The graphite bearing can slow down the friction of the thrust plate on the motor base. This accelerates the wear of the thrust disc and the graphite bearing, which easily causes the thrust disc to directly rub against the motor housing, increases the load on the motor, and even burns the motor in severe cases. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a submersible pump that can prolong the practical life of the motor. [0004] In order to solve the above problems, the present invention adopts the following technical solutions: a submersible pump, including a motor, a water pump arranged on the motor, and a short shaft coaxially connected wi...

AI Technical Summary

Problems solved by technology

[0002] The bottom of the motor used in the existing submersible pump is installed with a thrust plate and a graphite bearing. The thrust plate rotates at high speed with the motor shaft. The graphite bearing can slow down the friction of the thrust plate on the motor base. Accelerates the wear of the thrust plate and graphite bearing, which may easily cause the thrust plate to directly rub against the motor shell, increase the load on the motor, and even burn the motor in severe cases

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