Multi-working-condition optimization design method for spatial guide vane of rotary vane type mixed flow pump

Abstract

The invention discloses a multi-working-condition optimization design method for a spatial guide vane of a rotary vane type mixed flow pump. The method comprises the following steps: directly selecting three key geometrical parameters, namely an inlet placement angle, a guide vane diffusion angle and a guide vane wrap angle which influence the hydraulic performance of a spatial guide vane as optimization variables; taking the weighted average highest efficiency of the rotary vane type mixed flow pump under the three impeller blade placement angles as an optimization target and adopting a weight factor; establishing an optimized mathematical model for the rotating vane type mixed flow pump under multiple working conditions of spatial guide vanes; optimized mathematical model established, establishing a function relational expression between the optimization target and the optimization variable by using a multiple regression analysis method; according to the method, the function relationof the rotating vane type mixed flow pump space guide vane is optimized, the function relation is solved by combining a genetic algorithm, the combination of three optimized variables optimized underone set of multiple working conditions is obtained, after multi-working-condition optimization is conducted, the adaptability of the rotating vane type mixed flow pump space guide vane to the impeller vane placement angle is improved, and the hydraulic performance of the mixed flow pump under multiple working conditions is improved.

Description

technical field [0001] The invention belongs to the optimization technology applied to the hydraulic performance of the guide vane, relates to a rotary vane mixed flow pump, in particular to a multi-working condition optimization design method for the space guide vane of the rotary vane mixed flow pump, so as to comprehensively improve its performance in different working conditions. Hydraulic performance under operation. Background technique [0002] As a pump type integrating centrifugal pump and axial flow pump, the mixed flow pump has the advantages of high head, large flow rate and wide high efficiency area, and can also improve the hump phenomenon. For large mixed-flow pumps, the adjustable or non-adjustable vane placement angle of the pump impeller has become a sign of the advanced structure of the pump, and the form and structure of the vane adjustment are becoming more and more perfect and diverse. see figure 1 The blade-adjustable mixed-flow pump impeller structu...

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Problems solved by technology

However, this type of pump also has some shortcomings: when the working conditions change (when the placement angle of the impeller blades changes), the matching degree between the original guide vane design and the impeller decreases, and the hydraulic performance deteriorates accordingly. In view of this situation, It is necessary to develop a new guide vane optimization design method suitable for rotary vane mixed flow pumps

However, at present, there is only an optimal design method for mixed-flow pumps with non-adjustable blades (that is, under fixed impeller blade placement angles), while for rotary vane mixed-flow pumps (impeller blade placement angle changes), no corresponding optimal design method has been proposed.

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