Movement Of Turbine Drived By Medium And Formation Mechanism Of Axial Vacuum And Experimental Study In A New Type Of Flotation Device

After analyzing the working principle of existing mechanical agitation flotation machine and jet flotation machine, and combined with the working ways of water turbine, this paper proposes a new type of flotation machine. After having related understanding to the new-type flotation machine,than consider to design a type of stirring device for inspiration by using medium to drive impeller rotating (hereinafter referred to as the stirring device),by using multiple nozzle oblique impact impeller to drive impeller rotating. Under the action of high speed jet, the impeller is rotating in the new type of flotation machine, and vacuum negative pressure zone formed in the center area, and then takes air from the air inlet. Paper has designed and created the stirring device, and analyzed the feasibility of the stirring device from the theory perspective, and described the force of the impeller under the effect of jet and the relationship between impeller speed and the inspiratory capacity when impeller rotating, and at the same time, in order to understand its specific ways of working,also made some related experimental test. So paper has made thorough analysis to the work principle of stirring device on the basis of theory analysis and practice.This paper, by using Fluent software of computational fluid dynamics(CFD) software to make some related simulation on the impeller blade that stirring device for inspiration by using medium to drive impeller rotating has, and analyze the force and the ways of the jet flow impact on impeller blade from the perspective of computational fluid dynamics, and simulate the effect that jet impact on the blade and the local field of the impeller impacted by jet, making theoretical basis for further design and optimization of impeller. The main contents of the paper are as follows:1.Through design and create the stirring device, make sure its size of components, and test its effect of its working ways from experimental test, to explore its working advantages and disadvantages from experimental test perspective;2. On the basis of the theory of fluid mechanics knowledge, theoretical exploration was carried out on the mixing mechanism, and analyze that there is a linear relationship between the impeller speed and jet impact force under jet high speed pulp flow form the multiple nozzle, and analyze that there is also a linear relationship between impeller speed and inspiratory capacity, while it formatted a vacuum negative pressure zone in the center of the impeller when worked, and put forward a theoretical guidance for further change of the new-type flotation machine, and provide a theoretical basis for improving the impeller speed and inspiratory capacity;3. Through experimental test to verify the relationship between impeller rotating speed and inspiratory capacity of new flotation machine;4. Using computational fluid dynamics software, calculate and simulate the stirring device, regard the local interaction between jet and impeller as research object, and simulate the force of the impeller blade, and the distribution of local flow field caused by interaction between medium and jet export from jet nozzle, lay a foundation for deeply understanding the working of the new-type flotation machine.