Centrifugal pump flow guiding mechanism

Abstract

The invention relates to a centrifugal pump flow guiding mechanism which comprises a cylindrical shell, a top plate, a central hole and vertical bosses, wherein the upper end of the cylindrical shell is provided with the top plate; the top plate is provided with the central hole; the periphery of the central hole is provided with the vertical bosses; the center height of the top plate is higher than the edge of the top plate; a spiral type flow guiding plate is arranged below the top plate in the circumferential direction; a bottom plate is arranged below the spiral type flow guiding plate; the upper edge and lower edge of the spiral type flow guiding plate are respectively welded together with the top plate and the bottom plate; and the diameter of the bottom plate is less than that of the cylindrical shell, and the lower end of the cylindrical shell protrudes below the bottom plate, so that a space serving as a water inlet is formed between the outer end of the spiral type flow guiding plate and the vertical wall of the cylindrical shell. The structure characteristics of the centrifugal pump flow guiding mechanism is structurally characterized in that a water blocking cylinder is arranged above the top plate; the diameter of the lower end of the water blocking cylinder is greater than that of each vertical boss; and when the water inlets of the previous level of impeller are arranged on the vertical bosses, the upper end of the water blocking cylinder is higher than water outlets at the periphery of the previous level of the impeller. By adopting the flow guiding mechanism, the working efficiency of a vertical multi-level centrifugal pump can be improved, and the centrifugal pump flow guiding mechanism is suitable for the connection of two adjacent impellers of the vertical multi-level centrifugal pump.

Description

technical field [0001] The invention relates to a water pump, in particular to a flow guiding mechanism used to connect two adjacent impellers of a vertical multistage centrifugal pump. Background technique [0002] It is known in the water pump production industry that in the water supply system of some high-rise buildings, in order to keep the pressure of the water supply of the top floor residents constant, the common method is to use a booster pump to pressurize the water supply system. The booster pump is a vertical multi-stage centrifugal pump. This vertical multistage centrifugal pump contains a cylinder with more than two impellers and a flow guiding mechanism for connecting two adjacent impellers. When working, the motor drives all the impellers to rotate. At present, the diversion mechanism used on the vertical multistage centrifugal pump includes a cylindrical casing with a top plate on the upper end of the cylindrical casing. There is a central hole on the top ...

AI Technical Summary

Problems solved by technology

When working, part of the water pumped out of the outlet of the lower impeller is sucked by the inlet of the upper impeller, and the other part is thrown to the inner wall of the cylindrical casing and then falls to the top plate of the cylindrical casing and continues to flow along the outer wall of the cylindrical casing. It flows to the bottom of the cylinder of the vertical multistage centrifugal pump, so that all the water pumped out of the outlet of the lower impeller cannot enter the interior of the upper impeller.

Therefore, the vertical multistage centrifugal pump adopting this flow guide mechanism has low working efficiency.

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