Method for hydraulically optimizing centrifugal pump under working conditions based on loss

Abstract

The invention discloses a method for hydraulically optimizing a centrifugal pump under a plurality of working conditions based on loss, which comprises the following steps of: establishing a multi-working condition hydraulic optimization model of the centrifugal pump based on various loss formulae; establishing relationships among various loss coefficients, specific speeds and flows of the centrifugal pump at different specific speeds under the different working conditions by external characteristic experiments; compiling multi-working condition hydraulic optimization programs PCC.exe of the centrifugal pump by adopting Visual C++; integrating the PCC.exe by adopting iSIGHT, taking parameter values of single-point design as initial values, taking heads and power under the plurality of working conditions as constraint conditions, taking maximum efficiency under the plurality of working conditions as a target, and optimizing the centrifugal pump by adopting a global optimization algorithm or combination; and designing a multi-working condition hydraulic model by adopting PCAD according to an optimal solution set obtained in the optimization. The method has the advantages of not only performing multi-working condition hydraulic design on the centrifugal pump according to performance requirements under the plurality of working conditions, but also performing energy-saving alternation on the conventional centrifugal pump.

Description

technical field [0001] The invention belongs to the field of hydraulic optimization of centrifugal pumps, and in particular relates to a loss-based hydraulic optimization method for centrifugal pumps in multiple working conditions. Background technique [0002] At present, the traditional single-point method is generally used for hydraulic design of centrifugal pumps, which can only guarantee the performance at the design point, but cannot guarantee the performance under non-design conditions. With the development of the national economy, the design of many centrifugal pumps not only requires the performance of the design conditions to be guaranteed, but also has clear requirements for the performance of non-design conditions, such as nuclear power centrifugal pumps. This requires a multi-condition hydraulic design of the centrifugal pump. [0003] So far, there have been no literature reports on the multi-condition hydraulic design method of centrifugal pumps, and only som...

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Problems solved by technology

Journal of Drainage and Irrigation Mechanical Engineering "Hydraulic Design of Centrifugal Top-filling Pumps in Nuclear Power Stations with Multiple Conditions" (No. 3, 2010) proposed the technology of combining the optimal combination of various impeller hydraulic design schemes and the hydraulic design of impellers with multiple working conditions, and applied it to nuclear power plants. In the hydraulic design of the two-stage top-charging pump in multiple working conditions, but this technology is only a scheme optimization, and the influence of the main geometric parameters of the guide vane on the performance of the top-charging pump is not considered in the design process

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