A supercavitation centrifugal pump helical impeller

Abstract

The invention relates to a spiral impeller of a super-cavitation centrifugal pump. The impeller is mainly composed of a blade, a front impeller cover plate and a rear impeller cover plate. The technical scheme is as follows: a single spiral blade is adopted and the geometrical shape of the inlet of the blade is transformed to achieve the requirements of a super-cavitation blade; a groove is formed in the back surface of the single spiral blade and close to a suction port; an initial cavity is formed at the groove during running of the super-cavitation pump; and the initial cavity is capable forming a stable super cavity along the back surface of the blade, and the whole smooth and stable super cavity covers the back surface of the blade, so that the blade in the impeller is prevented from corrosion of cavitation under high-speed running, and the blade is prevented from wear, damage, destroy or bubbles due to solid particles during a running process.

Description

technical field [0001] The invention relates to a design method of main parts of a single-vane centrifugal pump, in particular to a design method of a spiral impeller structure of a supercavitation centrifugal pump. Background technique [0002] The single vane pump impeller can only have one vane from the impeller inlet to the impeller outlet, so there is also a curved flow path, which is suitable for transporting large particles or materials containing fibers, so it is used in many industries such as chemical industry, mining, food, construction, papermaking, etc. It is widely used in industrial processes. Sometimes the centrifugal pump transports high-concentration, corrosive salt-brine medium. For example, when the brine pump transports brine, due to the complex structure of the internal flow channel of the pump, when the brine passes through, it is inevitable that there will be fine particles of precipitation adsorbed on the impeller blades. On the surface, it becomes ...

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Problems solved by technology

However, the above-mentioned patents only mentioned the use of physical methods to prevent salt accumulation, and did not make structural improvements to reduce the corrosion of blades by high-concentration brine media

[0005] In view of the above-mentioned defects, the inventor invented "a supercavitation centrifugal pump helical impeller", which not only provides the design method of the single-blade supercavitation pump impeller helical blade, but also solves the problem of single-blade supercavitation pump impeller to a certain extent. The blades of the vane pump have the functions of drag reduction, corrosion resistance and efficiency enhancement, thus improving the performance instability of the single vane pump, stabilizing the fluid flowing into the impeller, improving the hydraulic efficiency of the single vane pump to a certain extent, and prolonging the use of the pump Life and maintenance intervals

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