Flameproof submersible electric pump for dual-cooling efficient mining

Abstract

The invention relates to a flameproof submersible electric pump for dual-cooling efficient mining. According to the flameproof submersible electric pump, an oil-immersed motor as well as a water and oil resistant winding wire are adopted; a closed ring-shaped pressure regulating capsule is arranged in the inner cavity of the motor; a dual-cooling structure that strong water cooling in the outer cavity of the motor and self-circulation oil cooling in the inner cavity of the motor are combined is adopted for motor cooling; a mixed flow blade structure is arranged in front of the inlet of an impeller, a turbulent-flow-free balancing axial thrust technology is adopted for the inlet of the impeller, and no axial thrust balancing hole is formed, so as to solve the problem of liquid flow turbulence at the inlet of the impeller as well as effectively improve the axial thrust balancing effect and the pumping efficiency; and an electric pump shaft is in rolling bearing connection with an upper bearing seat and a lower bearing seat, so as to eliminate the phenomenon of eccentric abrasion caused by an improper electric pump mounting position. The flameproof submersible electric pump provided by the invention has the beneficial effects of being simple in structure, high in reliability, strong in practicability, efficient, and good in heat dissipation performance; furthermore, the flameproof submersible electric pump is simple to mount and wide in using range, and can be operated under various working conditions; and wastewater is pumped thoroughly, the total head is prevented from overloading, and the service life of the flameproof submersible electric pump is long.

Description

technical field [0001] The invention belongs to the field of drainage equipment in the irrigation and drainage industry, in particular to a dual-cooling high-efficiency mining explosion-proof submersible pump. Background technique [0002] There are two types of motors used in flameproof mine submersible pumps: dry motors and flooded motors. Since the dry motor is not allowed to enter water, it has strict requirements on the sealing of the electric pump, the protection level of the motor is high, its structure is complex, the manufacturing cost is high, and the reliability is unstable. The water-immersed motor does not have too strict requirements on sealing, and its reliability is relatively high. However, due to the use of water-lubricated sliding bearings, the radial clearance of the bearings is large, and it should be run upright. The effect of sagging leads to eccentric wear, which makes it difficult to guarantee product performance, and reduces reliability and service...

AI Technical Summary

Problems solved by technology

Dry-type motors are not allowed to enter water, so they have strict requirements on the sealing of electric pumps, high protection level requirements for motors, complex structures, high manufacturing costs, and unstable reliability.

The water-immersed motor does not have too strict requirements on sealing, and its reliability is relatively high. However, due to the use of water-lubricated sliding bearings, the radial clearance of the bearings is large, and it should be run upright. The effect of sagging leads to eccentric wear, which makes it difficult to guarantee product performance, and reduces reliability and life

Images