Double suction type suction pipe non-uniform incoming flow actively controlling axial flow pump

Abstract

The invention provides a double suction type suction pipe non-uniform incoming flow actively controlling axial flow pump. The double suction type suction pipe non-uniform incoming flow actively controlling axial flow pump comprises a pump body, an impeller, and guide vanes, a double suction type elbow is mounted at an inlet of a pump body, the double suction type elbow comprises two inlets and anoutlet, and the two inlets are symmetrically distributed according to the center of the outlet; the outlet is connected with the inlet of the pump body; and the flow adapted vanes are distributed on the inner walls of the inlets. The flow adapted vanes comprise upper flow adapted vanes and adjustable flow vane devices, the plurality of upper flow adapted vanes are equidistantly distributed on theupper sides of the inner walls of the inlets of the double suction type elbow in the radial direction, and the adjustable flow vane devices are arranged on the lower sides of the inner walls of the inlets of the double suction type elbow and used for changing the axial velocity, the radial velocity, and the absolute inflow angle of a fluid entering the inlets; and a non-uniform incoming flow actively controlling device arranged in the elbow is used for distorting the axial velocity, the radial velocity, and the absolute inflow angle of the inlet of the axial flow pump, a non-uniform incoming flow is adjusted, and thus the pump performance of the axial flow pump is improved.

Description

technical field [0001] The invention relates to the field of fluid mechanical engineering, in particular to an axial flow pump for active control of non-uniform incoming flow in a double-suction suction pipe. Background technique [0002] At present, in practical engineering applications, various types of pumps may have non-uniform inlet velocity distribution, which will have a certain degree of influence on the performance of the pump. There have been many related studies in this regard. Wang Fujun and others studied the coupling characteristics of the elbow-shaped water inlet channel and the axial flow pump, and found that the flow velocity distribution on the pump inlet section was not uniform, and pointed out that the coupling effect between the water inlet channel and the pump was obvious, and the internal flow mechanism of the pump caused by the coupling of the two In-depth research is necessary. Through numerical calculations, Shi Weidong et al. compared and analyzed...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the inlet flow channel under the condition of non-uniform flow at the inlet will distort the inlet velocity of the axial flow pump, which will cause problems such as pre-swirl, local flow separation and cavitation, and also lead to the head of the axial flow pump , The torque is reduced, which affects the performance of the axial flow pump

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