Jet self-sucking centrifugal water pump

Abstract

The invention discloses a jet self-sucking centrifugal water pump. The pump comprises a pump body, a nozzle, a diffuser, an impeller, an inner pump cover, a guide blade, an outer pump cover, a pump shaft, a bracket and a motor, wherein the motor is directly connected with the bracket; the pump shaft is coaxially connected with the motor; the impeller is arranged at the end of the pump shaft; two sides of the impeller are provided with a centrifugal pump chamber structure through matching of the outer pump cover, the guide blade and the inner pump cover; the opened end of the pump body is connected with the outer pump cover in a sealed mode, so that a centrifugal pump chamber is accommodated in the pump body; axial through holes are uniformly distributed on the end face of the inner pump cover and communicated with a water outlet cavity of the pump body; the diffuser is connected between the inner pump cover and a clapboard in the sealed mode; the end of the diffuser, which is positioned at one end of a water sucking port, is coaxially provided with the nozzle to form a jet pump structure; and the outlet of the diffuser is positioned at the inlet of the impeller. A jet pump and a centrifugal pump are integrated to achieve performance complementation; the jet pump helps the centrifugal pump to self-suck, the self-sucking process is short, and self-sucking capability is high; andthe pump has an integrated structure and is not required to be additionally provided with a self-sucking device, so that matching cost is saved, and the pump is particularly suitable to be used as a marine pump.

Description

technical field [0001] The invention relates to a water pump structure, in particular to a jet type self-priming centrifugal water pump. Background technique [0002] Centrifugal water pumps are mainstream pump products and are widely used in conventional water delivery systems. From the structure itself, the self-priming ability of the centrifugal pump is very weak, and it is usually self-priming under the action of an additional self-priming device. The self-priming device of the existing centrifugal pump has a variety of structural forms, the simplest structure is a built-in return hole between the water outlet and the suction port of the pump body, and the medium flow output by the impeller after the centrifugal pump is started is partly diverted through the return hole To the suction port, part of the medium flow circulates in this way to promote the formation of negative pressure at the pump suction port to achieve self-priming. This structure sacrifices pump efficien...

AI Technical Summary

Problems solved by technology

The vacuum self-priming device has a compact structure, short self-priming time and strong self-priming ability, but it needs to be equipped with corresponding air compressors or vacuum pumps, thereby increasing the supporting power and increasing supporting costs

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