A multi-condition hydraulic design method for guide vane centrifugal pumps

Abstract

The invention discloses a multiple-working-condition hydraulic design method for a guide vane type centrifugal pump. The multiple-working-condition hydraulic design method for the guide vane type centrifugal pump mainly comprises the following steps that specific speed solution is conducted on the design working conditions of the guide vane type centrifugal pump, and the design working condition with the specific speed as an intermediate specific speed is selected and designed; multiple-scheme design is conducted on an impeller and guide vanes through an experiment design method, and the CFturbo style is adopted; mesh generation is conducted on a model, numerical simulation is conducted on a scheme through CFX, the lift and the efficiency value are read, and function fitting is conducted between the lift and a flow; function fitting is conducted between the lift and the flow of a design parameter point, the coefficient of a fitting function is used as a design goal, input main geometrical parameters are used as input values, an approximate response model is established through the Kriging model, rapid computation is conducted on the approximate response model through a multiple-target genetic algorithm, and then the optimal value is obtained. By the adoption of the multiple-working-condition hydraulic design method for the guide vane type centrifugal pump, the requirement for multiple-working-condition hydraulic design of the guide vane type centrifugal pump can be met; the multiple-working-condition hydraulic design method for the guide vane type centrifugal pump can also be used for multiple-working-condition hydraulic design of other guide vane type centrifugal pumps.

Description

technical field [0001] The invention relates to the field of multi-working-condition operation design of rotating machinery, in particular to a multi-working-condition hydraulic design method for a guide vane centrifugal pump. Background technique [0002] The centrifugal pump hydraulic components of guide vane centrifugal pump are composed of impeller, guide vane and volute. Its wide application has played an important role in the rapid development of industry, agriculture and nuclear power, which is currently highly valued. Guide vane centrifugal pumps tend to operate at deviations from the design point, which greatly reduces the efficiency and service life of guide vane centrifugal pumps, especially for nuclear power pumps. At present, the design of the pump is mainly for a single design working condition (the working condition is that the pump works and runs at a set flow rate to achieve the required head and efficiency), without considering the situation of the off-desi...

AI Technical Summary

Problems solved by technology

At present, the design of the pump is mainly designed for a single design condition (the working condition is that the pump works and runs at a set flow rate to achieve the required lift and efficiency), without considering the off-design condition

As a result, when the centrifugal pump operates in other design conditions, the efficiency is low, and huge vibration and noise are generated, which affects the operating life of the pump.

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