Axial flow pump capable of controlling eddy current and improving performance

Abstract

The invention discloses an axial flow pump capable of controlling eddy current and improving performance. The axial flow pump comprises a pump body and a driving shaft arranged in the pump body, wherein blades are sequentially arranged on the driving shaft along the flowing direction of fluid. The axial flow pump is characterized in that the blades are wing-shaped blades, active jet flow cavities recessed into the blades from suction surfaces are arranged in the blades along the extension direction, an opening, located on the suction surface, of the active jet flow cavity is a jet flow outlet, the active jet flow cavity is provided with a jet flow inlet penetrating through one side wing end of the blade in the extension direction, and the jet flow inlet is communicated with an active jet flow source; and a rectifying pin which is located between the jet flow inlet and the jet flow outlet and used for prolonging a fluid flowing path is arranged in the active jet flow cavity in a protruding manner, and the overflowing area in the active jet flow cavity is gradually reduced in the fluid flowing direction. The vortex area of the surface of the blade is reduced, the lift coefficient of the blade is improved, the working efficiency of the axial flow pump is improved, fluid distribution is more uniform, the cavitation erosion phenomenon in the axial flow pump is prevented, and the working noise of the axial flow pump is reduced.

Description

technical field [0001] The invention relates to the field of machinery, in particular to an axial flow pump which controls vortex flow and improves performance. Background technique [0002] Axial flow pumps rely on the force generated by the blades of the rotating impeller on the liquid to transport the liquid along the axial direction. There are several types of vertical, horizontal, inclined and through-flow pumps. In environments such as hydraulic transportation. [0003] Under the condition of high-speed rotation of the central shaft, the fluid is transported by the blades from the lower inlet to the upper outlet. The hydraulic characteristics of the blades largely determine the efficiency of the axial flow pump. When the fluid passes through the blades of traditional axial flow pumps, complex and unstable flows such as a large number of vortexes, boundary layer separation, and cloud cavitation will appear on the blade surface, resulting in poor lift-drag characterist...

AI Technical Summary

Problems solved by technology

When the fluid passes through the blades of traditional axial flow pumps, complex and unstable flows such as a large number of vortexes, boundary layer separation, and cloud cavitation will appear on the blade surface, resulting in poor lift-drag characteristics of the blades and insufficient work efficiency to meet the current requirements. industry needs

Moreover, under the actual working conditions of the axial flow pump, the central shaft is rotating at high speed, and the fluid uniformity of the axial flow pump is often poor and the distribution is not uniform enough. Therefore, when it is operated in this state for a long time, it is easy to form cavitation and damage the axial flow. The wall surface of the pump blade induces vibration and noise, which seriously affects its performance, so it needs to be solved urgently

Images