Water pump impeller for washing machine and its application

Abstract

The invention relates to a water pump impeller for a washing machine, which includes a second impeller capable of radially dispersing fluid at a first end and a first impeller capable of drawing fluid axially, the first impeller and the second impeller are the same Shaft arrangement; the second impeller includes a second central shaft and second blades, the second blades are at least two and arranged at intervals on the outer periphery of the second central shaft, and the outer diameter of the second central shaft gradually increases along the fluid flow direction to form The end cover, at least part of the edge of the second vane is connected to the inner end surface of the end cover. Since the first impeller is axial, the relative flow velocity of the water flow is the largest at the outer edge of the first impeller, and cavitation will first occur at the outer edge of the first impeller. When reaching the second impeller, the liquid near the central axis of the second impeller is subjected to centrifugal force The cavitation on the outer edge is compressed so that it can only move axially close to the outer edge, and the cavitation collapses in the high-pressure area formed at the upper end of the second impeller, which greatly limits the development of the cavitation and improves the flow rate and lift of the pump. Thereby, the cleaning effect is improved.

Description

technical field [0001] The invention relates to a water pump impeller used in a washing machine, in particular to a water pump impeller which can be used in washing machines for dishes, fruits and vegetables, etc. to improve the cleaning effect. Background technique [0002] Before the water pump works, the water pump and the water inlet pipe must be filled with water, and then rely on the high-speed rotating impeller to make the liquid gain energy under the action of inertial centrifugal force to increase its internal pressure. When the impeller rotates rapidly, the first blade promotes the water quickly Rotate, fly out of the impeller with the action of centrifugal force, after the water in the pump is thrown out, the central part of the impeller forms a vacuum area, and then the water from the water source enters the water inlet pipe under the action of atmospheric pressure (or water pressure) , so that the cycle is endless, and continuous pumping can be realized. Becaus...

AI Technical Summary

Problems solved by technology

However, since the first blades for axially drawing water and for centrifugal dispersion are integrally formed, and the first blade part for axially drawing water is relatively short, in the process of drawing water, when the cavitation carried in the liquid If it develops to a certain extent, it will affect the characteristics of the outer edge of the first blade and reduce the performance. This is because the liquid in the flow channel of the centrifugal first blade flows from the axial direction to the radial direction, and the density of the liquid is higher than that of the gas. Under the action of centrifugal force, the cavitation in the liquid is easy to separate, and expand rapidly to block the flow channel, so that the suction performance of the pump is sharply reduced, which in turn affects the flow rate of the water outlet.

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