Motor front-mounted type submersible tubular pump

Abstract

The invention discloses a motor front-mounted type submersible tubular pump. The motor front-mounted type submersible tubular pump comprises a diffusing tube, a guide blade body, an impeller housing,an impeller component, a water charging horn-shaped tube, a flexible sealing part, a sealed short tube, a planetary reducer, a submersible motor, a wire discharging device, a water charging tube and aflow guide cap. The submersible tubular pump disclosed by the invention effectively reduces diffusion loss caused by a large diffusion angle of the guide blade body so that the efficiency of the submersible tubular pump is improved, the efficiency of a pump section of the submersible tubular pump is the same as the efficiency of a traditional tubular pump; meanwhile the planetary reducer is adopted; the submersible motor is designed as a high-speed motor so that the size of the submersible motor is greatly reduced; and thus the diameter, the size and the weight of the submersible tubular pumpare reduced, so the friction loss of the water charging tube is reduced and the efficiency of the submersible tubular pump is improved.

Description

technical field [0001] The invention belongs to the technical field of submersible electric pumps, and in particular relates to a motor front-mounted submersible tubular pump. Background technique [0002] Most of the large pumping stations for irrigation, water diversion and drainage in the plain areas of our country are low-lift pumping stations. For example, the design lift of the east route of the South-to-North Water Diversion Project is 1.7-90m, of which 6 are below 3m, accounting for 8%, and 57 pumping stations are about 6m , accounting for 76%. In addition, in recent years, the pumping stations in the urban flood control projects and water environment improvement projects that the country has vigorously developed are mostly low-lift pumping stations. These pumping stations have the characteristics of low head and large flow. It has a great influence on the efficiency of the pump device, so the selection of the pump device type is very important in the design. [000...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that the submersible motor has a large volume (generally its diameter is much larger than the diameter of the impeller), which will hinder the smoothness of the pumped water flow and cause a relatively large diffusion loss.

This is also an important reason why the efficiency of submersible axial flow pumps is lower than that of traditional axial flow pumps.

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