Efficient asymmetric guide blade body matched with annular pumping chamber

Abstract

The invention discloses an efficient asymmetric guide blade body matched with an annular pumping chamber. The guide blade body consists of blades (1) and a cover plate (2), wherein the guide blade body is installed between an impeller (3) and the annular pumping chamber (4); the blades (1) are fixed on the cover plate (2) and asymmetrically arranged in a circumferential direction; with a first blade as a starting point, in the rotating direction of the impeller, the included angle between the outlet edge of an adjacent blade and the outlet edge of a previous blade is theta, is related to the number of the blades, and is gradually increased from 2 degrees to 50 degrees; a sum of all the included angles is 3600 degrees; an optimal installing angle between a radius of the outlet edge of the first blade and an outlet central line of the annular pumping chamber is 0-150 degrees; inlet and outlet installing angles, wrap angles and other structural parameters of all the blades are the same; and the asymmetric structure is applicable to design of a cylindrical radial guide blade and a twisted spatial guide blade. The asymmetric guide blade body improves hydraulic matching performance of the impeller and the pumping chamber, thus improving the efficiency and the running stability of a pump.

Description

technical field [0001] The invention relates to a high-efficiency asymmetric guide vane body matched with an annular pressurized water chamber, belonging to the field of fluid machinery. Background technique [0002] The guide vane body is a device widely used in water pumps. In some water pumps, due to structural and design reasons, it is often necessary to design the pressurized water chamber into an annular structure. Due to the low matching characteristics of the annular pressurized water chamber and the impeller, the fluid in the annular pressurized water chamber produces a large hydraulic loss, resulting in The pump is less efficient. The guide vane body can collect and transport the liquid flowing from the impeller to the downstream, and convert the kinetic energy of part of the liquid flow into pressure energy, eliminating the rotation of the liquid flow and significantly improving the pump efficiency. The traditional guide vane blades adopt a structure uniformly a...

AI Technical Summary

Problems solved by technology

The current research focuses on the vane body whose blades are evenly arranged along the circumference. The performance of the guide vane has not been studied from the arrangement structure of the blades, so as to further improve the efficiency of the guide vane body and the matching performance with the impeller and the pressure water chamber.

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