Design method for spiral single-channel non-blocking centrifugal pump impeller

Abstract

The invention provides a design method for a spiral single-channel non-blocking centrifugal pump impeller. The impeller is applicable to the fields of sewage treatment, channel cleanout, silt dredging and the like. The design formula of main geometric dimension parameters of the impeller is provided, wherein the parameters include the major diameter D of an outlet of the impeller, the diameter Dj of an inlet of the impeller, the radius Rs of a rear cover board of the impeller, the inclination angle a of the outlet edge of the impeller, the width b of the outlet edge of the impeller, the blade wrap angle phi and the blade outlet mounting angle beta. The spiral single-channel non-blocking centrifugal pump impeller designed according to the method can improve the condition of flowing of multiphase flow media in the impeller, and the conveying capacity and stability of the non-blocking pump impeller can be improved on the condition of conveying media containing large-grained objects prone to being wound.

Description

technical field [0001] The patent of the present invention relates to a design method of a spiral single-channel non-clogging pump impeller, specifically, a non-clogging pump impeller design method suitable for conveying medium containing large particles and flexible objects. Background technique [0002] Non-clogging centrifugal pump is a special type of centrifugal pump for conveying multiphase flow medium. When conveying medium containing large particles or flexible materials, the impeller of ordinary non-clogging centrifugal pump is prone to clogging and jamming. Especially in the occasions of municipal sewage discharge, dredging and sediment transportation, unbreakable large particles of impurities and long strips of flexible materials are prone to blockage when passing through the impeller flow channel, and flexible materials with complex shapes are easily entangled on the blades. Or the edge of the impeller, resulting in the instability of the impeller operation and i...

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Problems solved by technology

[0002] Non-clogging centrifugal pump is a special type of centrifugal pump for conveying multiphase flow medium. When conveying medium containing large particles or flexible materials, the impeller of ordinary non-clogging centrifugal pump is prone to clogging and jamming.

Especially in the occasions of municipal sewage discharge, dredging and sediment transportation, unbreakable large particles of impurities and long strips of flexible materials are prone to blockage when passing through the impeller flow channel, and flexible materials with complex shapes are easily entangled on the blades. Or the edge of the impeller, resulting in the instability of the impeller operation and internal flow, and even the impeller stuck phenomenon

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