Designing method for hydraulic power of space guide-blade centrifugal pump

Abstract

The invention discloses a designing method for hydraulic power of a space guide-blade centrifugal pump. An impeller hydraulic structure comprises a front cover plate, blades and a rear cover plate. The method comprises the following steps: (1) according to a given impeller geometric parameter as well as the flow rate, lift and rotation velocity value, solving a calculation method of the space guide-blade shaft surface hydraulic design parameters and a control algorithm of a guide-blade shaft surface shape and blade mold-line bezier curve on the basis of a binary flow theory; carrying out the hydraulic optimization design for space guide blades according to the method; (2) controlling streamlines on the upper cover plate shaft surface and streamlines on the shaft surface of the lower cover plate of the space blades by adopting a ternary Bezier curve equation, and adjusting the shaft surface streamlines on the basis of the variation rule of a guide-blade shaft surface flowing area; (3) controlling the vane mold-line arrangement angle distribution principle of the space blades by adopting a quartic Bezier curve equation; (4) adopting the data obtained in the steps (1) to (3) as dimensional parameters of the centrifugal pump space blades, and manufacturing the centrifugal pump space blades meeting the design requirement. The designed space blade can reduce the hydraulic loss in the vanes, improve the flowing situation inside the blade and improve the operation stability and hydraulic efficiency of the centrifugal pump.

Description

technical field [0001] The invention belongs to the field of hydraulic design methods of centrifugal pumps, in particular to a hydraulic design method of space guide vane centrifugal pumps, which is mainly used for fast and effective hydraulic design of space guide vanes of centrifugal pumps, speeding up product development cycles and reducing development costs; at the same time, through Optimize the flow area of ​​the space guide vane and the placement angle of the blade, reduce the hydraulic loss in the space guide vane, further improve the efficiency of the hydraulic model, and meet the energy-saving requirements. Background technique [0002] The space guide vane, located behind the impeller, together with the impeller constitutes the flow-passing part of the centrifugal pump. Space guide vanes are widely used in deep well centrifugal pumps and guide vane mixed flow pumps. The main function of the space guide vane is to collect the liquid at the outlet of the impeller a...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the existing space guide vane design method has the following disadvantages: 1) relying too much on the experience of designers and the selection of relevant experience coefficients, resulting in long product development cycles and high costs; 2) It is impossible to quickly and effectively control the shape of the blade axial surface and the placement angle of the blade profile, resulting in a large hydraulic loss in the space guide vane flow channel and low efficiency

Images