Spiral-flow type jet pump

Abstract

The invention relates to a spiral-flow type jet pump. The jet pump comprises a water inlet pipe, a spiral flow generator, a nozzle, a throat pipe, a water suction pipe, a diffusion pipe and a water outlet pipe. The jet pump is sequentially provided with the water inlet pipe, the spiral flow generator, the nozzle, the water suction pipe, the throat pipe, the diffusion pipe and the water outlet pipe from left to right. An adjustable type spiral flow generating device is arranged in front of the nozzle of the jet pump, and the incoming flow of the water inlet pipe is divided into a plurality of strands and enters the position close to the nozzle in the symmetrically-tangent direction so as to form a vortex, the flow of sucked liquid is accordingly increased, and the efficiency of the jet pump is improved. The spiral-flow type jet pump is simple in structure, easy to mount and low in cost. According to different working conditions of the jet pump, different spiral flow intensities can be adjusted, so that an optimal operating point is obtained.

Description

technical field [0001] The invention relates to a jet pump, in particular to a swirling jet pump. Background technique [0002] The jet pump uses liquid as the working medium, and through the turbulent diffusion of the fluid particles, it transfers energy to a fluid mechanical device of the pumped fluid; the jet pump is composed of a nozzle, a throat, a suction chamber and a diffusion tube; the jet pump The working liquid enters the nozzle driven by the power source, and due to the viscous effect between the jet and the air, the air near the nozzle is taken away, so that a negative pressure is formed near the nozzle, and the absorbed liquid is pressed into the suction chamber under the action of the external atmospheric pressure , and enter the throat together with the high-speed working liquid, the momentum exchange occurs between the two liquids in the throat, the working liquid transfers a part of the energy to the liquid, when the speed of the two liquids reaches the end...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the efficiency of the jet pump, many scholars have explored the optimal size of each structure of the jet pump to improve the efficiency of the jet pump, such as "Numerical Calculation of the Optimal Length of the Throat of the Jet Pump" in the Journal of Hydraulics (No. 10, 2003) Research on the optimal size of the throat, nuclear power engineering "Numerical Simulation of Optimum Throat and Nozzle Distance of Jet Pump" (No. 2, 2008) research on the optimal size of throat and mouth distance, Journal of Wuhan University Numerical simulation of the impact on jet pump performance" (No. 1, 2010) studies the optimal size of the nozzle eccentricity; but due to the limitation of the working principle of the jet pump, the optimization of the structure size of the ordinary jet pump can only find out the specific working conditions. In the case of the size corresponding to the highest efficiency, the actual efficiency has not been substantially improved

[0004] Therefore, many scholars improve the efficiency of the jet pump by improving the structure of the jet pump, such as the use of pulse jet (201210347306.5). to push the sucked fluid, thereby improving its efficiency; irrigation and drainage machinery "Numerical Simulation and PIV Measurement of Multi-nozzle Jet Pump Flow Field" (No. 1, 2009) proposed a multi-nozzle jet pump, multi-jet and sucked fluid Fully mix in the short throat, reduce the friction loss of the throat, improve the flow velocity distribution at the inlet of the diffuser, reduce the diffusion loss, and achieve the purpose of improving efficiency; however, the pulse jet pump needs to be installed at the inlet of the jet pump with high cost Hydraulic pulse generators, etc., while the nozzles of multi-nozzle jet pumps are difficult to process

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