Simulation And Optimization Of Snow Remover On Multi-Function Electric Vehicle

Aiming at the recent trends of development for miniaturization, mechanization and handiness of snow remover, the objective which take electric vehicle as traction to drive snow remover is proposed. Snow remover is made up of snow collection, centrifugal fan and canister aimed at throwing snow. The motion of snow particles in the snow collection and centrifugal fan is researched by theoretical analysis. Three-dimension model of snow remover is established by CREO. Such kinds of performance parameters including efficiency of cleaning snow and practical flow are analyzed and calculated. The feasibility of snow remover is verified, which means the reasonable relationship between velocity of electric vehicle and thickness of cleaning snow has been found out.To make the structure of snow remover main parts more reasonable, the parameters of optimizing snow collection are got by original design qualitatively and quantitatively. Through the static analysis, the optimized values of helical blade’s screw pitch and thickness are confirmed. The strength and rigidity of helical blade are further guaranteed. Through pre-stressed modal analysis, the reasonable range of helical blade’s rotary speed is obtained. The important theoretical basis for avoiding resonance will be provided in the future.The characteristic of flow field in the volute is analyzed and the back flow is observed. The static pressure sharply increasing and snow blocking centrifugal fan are lead by volute its own diffusion. In terms of the velocity of fluid near rear cover is bigger than its near impeller centre and front disk, back flow is remarkably suppressed. The snow flow in outlet decreasing and velocity of snow particles in outlet sharply increasing are result from increasing impeller inlet diameter. With the increasing of impeller inlet diameter, the raising of velocity of snow particles in outlet is hindered by snow flow remarkably decreasing in outlet. Enlarging blade outlet angle is not useful to modify flow field structure in impeller, but decreasing blade outlet angle will be beneficial to optimize phenomenon——the velocity of snow particles is unequally distributed in impeller. Some defects in original design are determined by research results. Many references and advises about optimizing and modifying centrifugal fan are provided in the future.