Semi-open type water pump and washing machine to which water pump is applied

Abstract

The invention relates to a semi-open type water pump. The semi-open type water pump comprises a shell and an impeller. A water inlet is formed in the first side wall of the shell, a water outlet is formed in the second side wall of the shell, and a containing cavity for containing the upper portion of the impeller is formed in the position, corresponding to the water inlet, in the shell. The upperportion of the impeller at least comprises a first shaft located in the center, an end cover covering the upper end of the first shaft, and first blades distributed on the lower wall face of the endcover at intervals and arranged around the periphery of the first shaft. The upper wall face of the end cover is arranged close to the inner top wall of the containing cavity, and a gap is formed between the upper wall face of the end cover and the inner top wall of the containing cavity. According to the semi-open type water pump structure, the lower portion of the impeller is of an open type structure exposed out of the shell, the upper portion of the impeller is arranged in the shell, and the upper end of the impeller is sealed; and through the arrangement of the end cover, vortexes formedbetween the upper end of the impeller and the inner top wall of the containing cavity can be avoided, energy losses are reduced, work applied to fluid is improved, thus, the flow speed of effluent ofa spraying arm is increased, and then the washing effect is improved.

Description

technical field [0001] The present invention relates to the technical field of fluid power conveying structures, and specifically refers to a semi-open water pump. The present invention also relates to a cleaning machine using the above water pump. 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. Bec...

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Problems solved by technology

However, although the straight blades on the upper section of the open impeller have better fluid passage, the efficiency is low, and vortices are easily generated between the upper end of the impeller and the spray arm, causing energy loss and affecting the flow rate of the spray arm. Affect cleaning effect

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