Prediction method and system for full characteristic curve of centrifugal pump

By constructing a prediction method for the full characteristic curve of centrifugal pumps based on Euler's equations and similarity laws, identifying characteristic operating points and establishing mapping relationships, the problems of large errors and poor adaptability in the prediction of the full characteristic curve of centrifugal pumps in the prior art are solved, and accurate performance prediction under complex operating conditions is achieved.

CN122132664APending Publication Date: 2026-06-02YANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
YANGZHOU UNIV
Filing Date
2026-01-31
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies cannot accurately reflect performance changes under complex operating conditions when predicting the full characteristic curve of centrifugal pumps, and lack consideration of dynamic factors such as speed, head ratio, and torque ratio, resulting in large prediction errors, especially poor adaptability under new designs or special operating conditions.

Method used

By constructing a theoretical energy transfer relationship based on the Euler equation, determining undetermined coefficients by combining similarity laws, and using the measured curves of known specific speeds to perform coordinate transformation and continuity analysis, characteristic operating points are identified, a mapping relationship between head ratio and torque ratio is established, the undetermined coefficients are corrected, and the full characteristic curves of the target centrifugal pump under different operating conditions are generated.

Benefits of technology

It achieves accurate prediction of centrifugal pump performance under different operating conditions, maintaining theoretical consistency while possessing good engineering applicability, thus overcoming the limitation of the applicability of traditional methods.

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Abstract

This invention provides a method for predicting the full characteristic curve of a centrifugal pump, relating to the field of centrifugal pump performance prediction technology. First, based on the Euler equation and similarity law of centrifugal pumps, a theoretical energy transfer relationship is constructed, and undetermined coefficients characterizing the theoretical operating conditions are obtained, giving the full characteristic curve prediction a physical basis and avoiding the limitations of purely empirical fitting. Next, measured full characteristic curves of centrifugal pumps with known specific speeds are introduced as samples. Through coordinate transformation and feature point identification, feature parameters are extracted, and a mapping relationship between these parameters and the specific speed is established, accurately depicting the curve morphology changes under different specific speeds. Finally, the theoretical undetermined coefficients and empirical undetermined coefficients corrected for specific speed are integrated, and the head and torque data of the target pump are continuously calculated for the entire flow rate, making the predicted curve both theoretically consistent and engineeringly applicable.
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