Mechanical-sealing type submersible motor

Abstract

The invention provides a mechanical-sealing type submersible motor. The mechanical-sealing type submersible motor comprises a water feeding section, an upper bearing, a stator assembly, a rotor assembly and a lower bearing, wherein the rotor assembly is arranged in the motor; the stator assembly is arranged at the outer side of the rotor assembly; the water feeding section is arranged at the top part of the motor; the upper bearing is arranged under the water feeding section; the lower bearing is arranged at the bottom part of the motor; a first mechanical seal is arranged at the middle part of the water feeding section; a second mechanical seal is arranged at the lower part of an upper bearing seat of the upper bearing; and a third mechanical seal is arranged at the upper part of an upper bearing seat of the lower bearing. The mechanical-sealing type submersible motor provided by the invention has the advantages that the mechanical seals are arranged at the two ends of the upper bearing and the upper end of the lower shaft, so that water can be effectively prevented from entering a bearing chamber; and the bearings operate in anhydrous lubricating grease, so that the service lives of the bearings can be effectively prolonged.

Description

technical field [0001] The invention relates to a water conservancy machine, in particular to a motor of a submersible electric pump for pumping water. Background technique [0002] Submersible electric pump is a commonly used machine tool for farmland irrigation, waterlogging, fish pond water supply and drainage, etc. It has the characteristics of wide use and large quantity. The submersible motor is the power part of the submersible pump, and the submersible pump seal is usually divided into two parts: electrical seal and bearing seal. In the wet submersible motor, the sealing of these two parts has been successfully solved. Many domestic submersible pump factories produce a single wet submersible motor matching pump section. The electrical seal and bearing seal of the wet submersible motor are independent. If the bearing seal fails, It only causes the lubricating water of the water-lubricated bearing to enter the sand, and the rolling bearing lubricated by grease or thin...

AI Technical Summary

Problems solved by technology

[0003] But at present, the bearing adopts the sealing method of the skeleton oil seal, and the sealing effect is poor. Water easily enters the bearing chamber through the space between the skeleton oil seal and the shaft, and mixes with the lubricating grease in the bearing chamber, which affects the service life of the bearing.

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