An axial flow pump impeller guide cone

Abstract

The invention relates to an axial flow pump, in particular to an axial flow pump impeller water-guiding cone. The axial flow pump impeller water-guiding cone comprises a water-guiding cone, impeller blades, a wall face of an impeller chamber, an impeller hub body and a pump shaft. The axial flow pump impeller water-guiding cone is characterized in that the water-guiding cone is arranged at the front portion of an axial flow pump impeller, and a contracting line of the water-guiding cone adopts a fitting curve, so that uniform flowing of fluid in a flow passage of the water-guiding cone is realized. The axial flow pump impeller water-guiding cone has the advantages that velocity-weighted average swirl angle at the outlet section of the water-guiding cone can be decreased, the axial velocity equilibrium of distribution at the outlet section of the water-guiding cone is improved, and the hydraulic efficiency of the impeller is improved.

Description

technical field [0001] The invention relates to an axial flow pump, in particular to an axial flow pump impeller water guide cone. Background technique [0002] Axial flow pump is a very widely used hydraulic mechanical device. It has a wide range of applications in irrigation and drainage, urban water supply and drainage, sewage and long-distance water supply. The impeller of a common axial flow pump includes the following parts: impeller hub body, The blade installed on the impeller hub body, the water guide cone installed at the end of the impeller hub body; the impeller hub, the blade and the water guide cone together form the impeller. In order to ensure that the axial flow pump impeller is in an ideal working state, it is generally required The water flow is evenly distributed, and the inflow has no pre-swirl, etc.; adding a water guide cone at the front of the impeller of the axial flow pump can accelerate the water flow evenly before entering the impeller, and provid...

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Problems solved by technology

[0002] Axial flow pump is a very widely used hydraulic mechanical device. It has a wide range of applications in irrigation and drainage, urban water supply and drainage, sewage and long-distance water supply. The impeller of a common axial flow pump includes the following parts: impeller hub body, The blade installed on the impeller hub body, the water guide cone installed at the end of the impeller hub body; the impeller hub, the blade and the water guide cone together form the impeller. In order to ensure that the axial flow pump impeller is in an ideal working state, it is generally required The water flow is evenly distributed, and the inflow has no pre-swirl, etc.; adding a water guide cone at the front of the impeller of the axial flow pump can accelerate the water flow evenly before entering the impeller, and provide the impeller with an evenly distributed inflow without pre-swirl. At the same time, the design is reasonable The water guide cone plays an important role in improving the quality of the inlet flow field of the axial flow pump, improving the uniformity and stability of the velocity; at present, there are few reports on the research on the water guide cone of the axial flow pump impeller, and the research of domestic and foreign scholars mainly focuses on the axial flow pump impeller. Research on the water inlet conditions of flow pumps; Zhu Honggeng, Yuan Shouqi et al. studied the influence of elbow-shaped water inlet channels on the hydraulic performance of vertical axial flow pumps; The hydraulic characteristics of the water channel have been studied, so it is of practical significance to design an excellent water guide cone to provide more uniform and stable inflow conditions for the axial flow pump impeller

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