Immersible pump

Abstract

The invention discloses an immersible pump which solves the problem that an existing immersible pump is easily damaged as a motor rotor is often subjected to a relatively large axial force. A technical scheme is as follows: the immersible pump comprises a water pump housing, a motor and a control box arranged coaxially, wherein the control box is coupled to one end of a motor housing, a controlleris arranged in the control box, a water pump shaft is arranged in the water pump housing, a coupling rack is coupled to the other end of the motor housing, the coupling rack is hollow, a transmissionshaft is coupled in the coupling rack in a penetrating manner, one end of the transmission shaft is circumferentially fixedly and axially movably coupled to the motor shaft, and the other end of thetransmission shaft is in transmission coupling to the water pump shaft; an inward shoulder is arranged in the coupling rack, a protruding outward structure is arranged on the outer circumferential surface of the transmission shaft, the outward structure and the motor shaft are separately arranged on two opposite sides of the inward shoulder, the outward structure and the inward shoulder are overlapped on the coupling rack radially, and the inward shoulder supports the transmission shaft axially through the outward structure.

Description

technical field [0001] The present invention relates to a submersible pump which, in use, submerges below the surface of the water. Background technique [0002] The structural form of the submersible pump is cylindrical, and a water pump shaft is arranged in the water pump casing, and the water pump shaft is arranged in the axial direction of the water pump casing. The water pump shaft is provided with a helical structure, and the water pump shaft is directly connected to the motor shaft. Driven by the motor shaft, the water pump shaft rotates, and the helical structure on the water pump shaft pushes water toward the upper side. When the water pump shaft pushes the water, the water exerts a reaction force on the water pump shaft, and the magnitude of the reaction force is proportional to the head of the water pump. In the actual application process, the water flow will continue to change, and the reaction force on the pump shaft is in the process of dynamic change, which i...

AI Technical Summary

Problems solved by technology

However, the relative circumferential rotation between the rotor and the stator of the motor is required to be smooth, and the structure of the motor cannot well adapt to the continuous oscillation of this reaction force. The motor in the existing submersible pump has a short service life and is easily damaged.

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