Novel fully-tubular electric submerged pump with shaft incapable of transferring torque

Abstract

The invention relates to a novel fully-tubular electric submerged pump with a shaft incapable of transferring torque; a submerged motor adopts wet stator winding structure, the impeller of a water pump is arranged in the inner cavity of a motor rotor, the vanes of the impeller are integrally welded with the inner circle of the motor rotor assembly by silicon steel plates through stacking, a radial bearing and a bidirectional thrust bearing are arranged in the inner seal bearing cavity of the motor rotor with the impeller, the motor rotor with the impeller is rotational and the shaft cannot rotate, and the inner rotational bearing cavity adopts dynamic seal structure. The invention has the beneficial effects that: the winding wire improve the electric insulation intensity of the electric submerged motor, so the reliability of the whole pump is improved, the vanes of the impeller are integrally welded with the inner circle of the motor rotor assembled by silicon steel plates through stacking to reduce the outer diameter of the motor rotor and improve the motor efficiency, the strength and rigidity requirements for the shaft are greatly reduced, the reliability is improved, the dynamic seal structure is compact and the seal effect is good, the axial length also can be reduced to realize compact structure, and the material consumption is also reduced.

Description

technical field [0001] The invention relates to a through-flow submersible electric pump, in particular to a novel full-through-flow submersible electric pump whose shaft does not transmit torque. Background technique [0002] At present, the water pump and the motor of the common tubular submersible pumps on the market are coaxial. The motor is a dry submersible motor. The pumped water flows through the outer wall of the motor to the outlet channel, which has nothing to do with the inside of the motor. Ordinary tubular submersible pumps have the following disadvantages: poor reliability, the motor chamber is easy to enter water, and it is easy to cause winding burnout; due to the limitation of the diameter of the motor, there is a diffusion angle at the water outlet of the pump, which causes a certain diffusion loss and affects the performance of the pump. Efficiency; the submersible electric pump has a long axial length, the length is 2100-6300mm, and it is not easy to ins...

AI Technical Summary

Problems solved by technology

Ordinary tubular submersible pumps have the following disadvantages: poor reliability, the motor chamber is easy to enter water, and it is easy to cause winding burnout; due to the limitation of the diameter of the motor, there is a diffusion angle at the water outlet of the pump, which causes a certain diffusion loss and affects the performance of the pump. Efficiency; the axial length of the submersible electric pump is long, the length is 2100-6300mm, and it is not easy to install as a gate pump; the structure is complex and difficult to maintain

Images