The Analysis Of Deformational Characteristics Of Impeller At High Revs

The function of the air turbine pump is to transfer the energy of working medium andcompressed air into mechanical energy, which can support the pump with dynamic force. Theflux of water possesses of pressure. The pressed water flows through the launch water tank intolaunch pipe，then driving object to leave the pipe. Thus, the specialty of launching is very quickand prompted, but meanwhile offers great power to ensure the object in the pipe obtain therequired velocity and get out in just few seconds. Because of the short launching process, theprime motor-turbine-must mount up to rating rev at very short time. In this process, the turbineis always in a variable working condition. The quick changing of working condition requires ahigh quality of the impeller in turbine. The material of impeller must meet the requirements ofintensity, rigidity and stability. If the turbine impeller engenders unrecoverable plasticdeformation, which can decrease the space of top impeller and pipe, the impeller may interferewith the inner wall and then lay serious hidden danger. Therefore, the analysis of deformationalcharacteristics of impeller at high revs is tied to the safety and reliability of the entire launchingsystem. In this way, the research program of this paper is of great theoretical importance andrealistic value.Actually, the working condition of the impeller must below the rating rev. Once it exceeds therating rev, plastic deformation would occur, whose significant character is beyond retrieve. Thus,this paper focuses on working out the deformational area and deformation potential energy,analyzing deformational characters when plastic deformation occurs, and coming into referenceto reliably choosing different impeller according to various working conditions.This paper investigates on the deformational character of the impeller when exceeding ratingrevs. through the gained deformational characters, we can attain how much the deformation andstrain would be. This research program plans to use mathematic method to figure out how thedistortional trait works and how it destroys the reliability of the impeller, that is, reasonablypredigesting model and restrain, establishing equilibrium equations, geometric equations andconstitutive equations, and analyzing the deformational characters. With this understanding, we can use functional analysis and extreme value to investigate energy strait such as strain energyand energy dissipation. After that, we can use simulation software such as ANSYS to set up finiteelement model and dynamic simulation to obtain the calculated results. At last, throughexperiments, we can attain the data we need for comparison, which we can use to validate therationality of the established model. We can in turn perfect the predigesting model and attainmore accurate outcomes. Through comparison with ANSYS results, we can find evidence toback up the modeling process. The conclusion can be our reference to design proper impellers invarious working conditions.