Design method for space guide vane of single-tube vertical type long-shaft multistage pump

Abstract

The invention belongs to the technical field of multistage pumps, and relates to a design method for a space guide vane of a single-tube vertical type long-shaft multistage pump. The method involves aspace guide vane axial length L, a space guide vane attack angle delta alpha, a space guide vane blade warp angle phi, a space guide vane blade inlet excretion coefficient phi3, a space guide vane inlet setting angle alpha3, a space guide vane outlet external diameter D1, a space guide vane outlet internal diameter D2, a space guide vane inlet inner diameter D3, a space guide vane inlet outer diameter D4, a space guide vane outlet setting angle alpha4, a space guide vane back cover plate outlet circular bead radius R1, a space guide vane front cover plate outlet circular bead radius R2, a space guide vane front cover plate inlet circular bead radius R3, a space guide vane back cover plate inlet circular bead radius R4, a space guide vane blade number Z2, and the blade of the space guide vane is 791 alary. The design method for the space guide vane of the single-tube vertical type long-shaft multistage pump has the advantages that the space guide vane greatly improves the stability andhigh efficiency of pump operating, the service life and repair cycle of the pump are prolonged, good economic effects are provided, the method is conducive to the combination with a computer, and theparameterization design is more convenient.

Description

technical field [0001] The invention belongs to the technical field of multistage pumps, and in particular relates to a design method of space guide vanes for single-pipe vertical long-axis multistage pumps. Background technique [0002] The single-tube vertical long-axis multistage pump is a kind of centrifugal pump, which is improved on the basis of the submerged pump, so that its performance is much higher than that of the submerged pump, and at the same time, it makes the operation more stable. The pump can be used to transport clean water, rainwater, scale water, sewage, corrosive industrial wastewater, sea water and other liquids. It is widely used in water supply companies, sewage treatment plants, power plants, steel plants, mines, petrochemical and other industrial and mining enterprises, as well as municipal water supply and drainage, flood control and drainage projects, which greatly meets the needs of the domestic market. [0003] The suction inlet of the single...

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However, the patent mentioned above only illustrates the optimization scheme, and does not provide a perfect and accurate design formula

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