Groove suction vane for pump

Abstract

The invention discloses a groove suction vane for a pump, which comprises a vane integrated with an impeller hub of the pump into a whole by fixation, and 1 to 3 grooves are arranged on the vane. Blocked fluid in a boundary layer is sucked by using the grooves, and a new boundary layer is also formed on the back of the grooves and can bear the counter pressure gradient of the fluid without separation. The sucking grooves designed and arranged according to the invention can radically eliminate the separation. As no separation zone exists, the pressure resistance can be greatly reduced. The groove suction vane realizes improving the performance of the pump in a larger operating range.

Description

technical field [0001] The invention relates to the technical field of pumps, in particular to a pump grooved flow vane. Background technique [0002] When the traditional pump is running, the best flow conditions can be obtained by adjusting the angle of attack of the flow. However, studies have shown that the angle of attack of the incoming flow significantly affects the performance of the pump, and at the same time it is easy to cause unfavorable flow separation. Such as figure 1 As shown, the angle of attack of the incoming flow causes the separation of the boundary layer of the moving blade, and the resulting vortex region is one of the most important factors causing energy loss. To analyze this phenomenon in detail: figure 2 As shown, the viscous friction stagnates the forward movement of the fluid, and the pressure also blocks the forward movement of the fluid, the fluid particle decelerates continuously, and finally stops at point S. The stopped fluid accumulate...

AI Technical Summary

Problems solved by technology

However, studies have shown that the angle of attack of incoming flow significantly affects the performance of the pump, and at the same time it is easy to cause unfavorable flow separation

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