Research On Firing Mechanism Of The Long-distance Aerodynamic Extinguishing Cannon

At present,the basic equipment to extinguish forest fires lies in a weak link. An equipment is needed urgently,which have lower cost,high-performance,better cross-country mobility,can climb a certain degree of slope by oneself,and can achieve a comprehensive long-range fire-fighting for inaccessible forest fires.The long-distance aerodynamic extinguishing cannon is an effective tool to fulfill the task.Optimization design,Adams simulation and finite element analysis are performed in this paper.The international and domestic development of the firing mechanism is introduced.In accordance with the viewpoint of the system theory,through the system analysis and system design method,the factors and methods of suitability analysis and design about the firing mechanism are presented.The feasible project of the firing mechanism is put forward.The structure design is performed with UG.The multi-objective optimization design is presented with the help of MATLAB optimization toolbox.The objective function of multi-objective optimization design leasts force of the claw's end,movement distance of the claw and volume of the cam.The aim is to reduce the force of claw, the volume of cam and the movement distance of claw,thus multi-objective optimization design can deal with the interference problem between the claw and fire bomb in the fire-fighting process well.Through ADAMS software,the claw and cam of the firing mechanism parametric modeling and dynamic simulation analysis are carried out.The simulation results give the spring damper coefficient,relationship of the impact force between the claw and cam,and verify the pressure angle of cam.Through the finite element analysis software PATRAN,the important parts of the firing mechanism is conducted the mechanical analysis.The stress distributing graph,aberration nephogram are obtained,which can provide the basis for the design of the firing mechanism components.