Blade airfoil split self-adaptive adjustment two-way vertical shaft tubular pump and adjustment method thereof

Abstract

The invention provides a two-way vertical shaft tubular pump with blade airfoil halving self-adaptive adjustment and an adjusting method thereof.A guide blade of the tubular pump is divided into an adjusting blade with the adjustable direction and a fixed blade along the chord length, and the contact end face of the adjusting blade and the fixed blade is the connecting part of the adjusting blade and the fixed blade; the adjusting blade is fixed on the adjusting rotating shaft and rotates along with the adjusting rotating shaft, so that the azimuth angle between the adjusting blade and the fixed blade is changed. When the two-way vertical shaft tubular pump operates in the forward direction, the forward inlet angle alpha 3 of the adjusting blade is adjusted through the adjusting rotating shaft, the impeller outlet circular rector is eliminated, kinetic energy is converted into pressure energy, and the water flow state in the guide blade is made to be in uniform transition; when the tubular pump runs reversely, the reverse outlet angle alpha '3 of the adjusting blade is adjusted through the adjusting rotating shaft, the water flow at the outlet of the guide blade is induced to generate reverse prerotation, and the reverse prerotation is fully counteracted through the rotating operation of the impeller, so that the water flow at the outlet of the impeller is free of rotation.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and in particular relates to a two-way vertical well tubular flow pump and an adjustment method thereof for blade airfoil self-adaptive adjustment. Background technique [0002] The bidirectional vertical well tubular pump belongs to the type of low-lift pump device, which has the outstanding advantages of simple structure, straight flow path, and high device efficiency. The two-way vertical well tubular pump is mainly composed of inlet and outlet water channels, impeller sections, guide vane sections, shaft sections, etc. Usually, the water inlet and outlet channels lead the water flow from the inlet pool evenly to the pump inlet, and then lead the water flow from the pump outlet to the outlet pool smoothly; the impeller is an energy supply device, and its function is to directly transfer the mechanical energy of the prime mover to the fluid. In order to improve the static pressure ener...

AI Technical Summary

Problems solved by technology

When the tubular pump is running in the forward direction, the matching between the rear guide vane and the impeller is high, which can effectively eliminate the velocity circulation at the outlet of the impeller and ensure the forward operating efficiency of the device; when the tubular pump is running in the reverse direction, The relative positions of the guide vane and the impeller are exchanged, the rear guide vane becomes the front guide vane, and the positive inlet angle of the rear guide vane is α 3 (That is, the reverse outlet angle α' of the front guide vane 3 ) distorts the flow direction of the water entering the impeller chamber and deteriorates the flow state of the impeller section, and the outlet of the impeller is connected to the shaft, which cannot effectively eliminate the velocity circulation at the outlet of the impeller, resulting in a significant reduction in the efficiency of the device operating in reverse

[0004] It can be seen that the guide vane designed by the traditional method is difficult to match the bidirectional flow characteristics of the vertical shaft tubular pump, and its bidirectional hydraulic performance cannot meet the requirements of the vertical shaft tubular pump.

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