High-speed multiphase flow gas-dissolving pump

Abstract

The invention discloses a high-speed multiphase flow gas-dissolving pump which belongs to the field of fluid machinery. The pump comprises a pump body, a pump cover arranged on the pump body and an impeller arranged in the pump body, wherein a closed pump cavity is formed between the pump body and the pump cover; closed runners are formed between the impeller and the pump body and between the impeller and the pump cover; a grove is arranged on the pump cover; one end of the blade of the impeller is provided with a ring matched with the groove; a running gap e is arranged between the impeller blade and the pump cover; a running space is arranged between a front cover plate of the impeller and the pump body; and a ring structure is sealed between the front cover plate of the impeller and the pump body. In the invention, gas is smashed in the pump cavity runners, dissolved into media in a disperse state and exhausted along with the media, thus the gas cannot be preservedin the runners of the pump body to guarantee the stability and the reliability of multiphase flow media delivery under the condition of different gas contents; and the rotation speed of a motor ranges from 3,000r / mi to 7,000r / min, and the maximum gas content of deliverable media can reach 30 percent, thus the gas can reach a highly disperse state and is mixed with the media and delivered out along with the media. The pump has the advantages of simple structure and convenience for mounting, use and maintenance.

Description

technical field [0001] The invention relates to the field of fluid machinery, especially hydraulic components and structures through special research, which are used to transport mixed multi-phase flow media with a gas content of 10%-30%, and a high-speed blade type with a speed range of 3000-7000r / min. Pump. Background technique [0002] When the existing centrifugal pump contains 5% gas, it cannot work due to the occurrence of cut-off. In many processes and some major equipment, it is necessary to pump media containing up to 30% gas, and the parameters still belong to the category of centrifugal pumps. Such as dissolved air flotation, dissolved air process, neutralization process, rust removal, denitrification of wastewater, ozonation treatment of drinking water, reuse of heavy water and wastewater, special military products, etc. all require media that can pump up to 30% of the air. [0003] For the existing closed impeller vane pump, when the gas-containing medium passe...

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Problems solved by technology

[0006] Aiming at the defects that the existing centrifugal pump cannot work when it contains more than 5% gas, the speed of the existing multiphase flow pump is not high, and the weight is heavy and the volume is large, the present invention aims to provide a high-speed multiphase flow dissolved air pump, which simultaneously solves the problem of It solves the problems of dissolved gas and high speed, and can meet the needs of various gas-liquid processes, military products, and urban water supply and drainage.

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