An impeller inlet edge optimization method for improving the shutoff head of a centrifugal pump

By modeling the impeller and optimizing its fluid dynamics, the problems of insufficient head at the shut-off point and unstable flow field caused by unreasonable blade inlet edge design were solved, and the centrifugal pump was able to operate with high performance and high stability under all operating conditions.

CN122407571APending Publication Date: 2026-07-17GUANGYI PUMP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGYI PUMP CO LTD
Filing Date
2026-04-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing centrifugal pump blade inlet side design lacks systematic optimization, resulting in insufficient head at the shut-off point, unstable flow field, and severe cavitation, making it difficult to meet the requirements of full-condition operation.

Method used

By modeling the impeller and applying the fluid dynamics control equations to optimize the blade inlet edge position, CFX-Pre software was used for steady-state calculations and mesh independence verification. The blade inlet edge was adjusted to increase the head at the shut-off point and improve the flow field distribution.

Benefits of technology

It achieves precise optimization of the blade inlet edge position, increases the head at the shut-off point, improves the flow field distribution in the flow channel, alleviates cavitation, and ensures stable operation of the centrifugal pump under all operating conditions.

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Abstract

The application discloses an impeller inlet edge optimization method for improving the dead point head of a centrifugal pump, and comprises the following steps: S1, determining a basic size of the impeller; S2, making an axial plane projection distribution map according to the basic size; S3, determining a fluid dynamics control equation; S4, constructing a model for calculating a fluid domain, which comprises an inlet section, the impeller and a volute; S5, adopting corresponding mesh division modes for different components and locally encrypting; S6, adopting CFX-Pre software to perform steady-state calculation, and selecting a Shear Stress Transport turbulent flow model; S7, performing mesh independence verification; and S8, judging whether the design requirement is met or not, and if not, modifying the blade inlet edge and repeating the relevant steps, so that the dead point head is effectively improved, the flow field distribution in the flow passage is improved, the cavitation phenomenon is relieved, the stable operation of the centrifugal pump under full working conditions is ensured, and a reliable research scheme reference for improving the dead point head of the centrifugal pump is provided.
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