Research On The Parameter Matching Of The Drive And Dynamic Sealing Structure Of A New Type Of Rotary Automaton

Based on the background of a new type of revolving automatic mechanical,which is preresearched by a certain country,this paper analyzes the sealing property of the gunpowder gas produced in the launching process of a new type of revolving automatic mechanical.First of all,combined with the current research situation at home and abroad,this paper analyzes the working principle and interior ballistic characteristics of the revolving automatic mechanical and its key components.According to the working principle and the main interior ballistics process of the revolving automatic mechanical,the sealing problems existing in the automaton are analyzed.Based on gas dynamics and one-dimensional quasi-steady theory,the sealing model of revolving automatic mechanical is established on the basis of classical interior ballistics.At the same time,the influence of the relevant structural parameters of the rotary bushing on the seal at the bore of the revolving automatic mechanical is analyzed by the method of numerical calculation,and the relevant rules of the rotary bushing seal are obtained.Furthermore,the temperature parameter is introduced,and the influence of thermal deformation of different parts on the bore seal is considered in the case of different firing numbers.combined with related experiments,the correctness of the theoretical analysis is verified.Secondly,on the premise of fully grasping the structure and working principle of the air guide chamber of the revolving automatic mechanical,by calculating the relevant structural parameters of the air guide chamber of the revolving automatic mechanical,the relationship between the air guide hole diameter,the initial piston volume,the length of the air guide hole from the bottom of the chamber and the pressure in the chamber is determined.Based on the relevant parameters of the air guide chamber,the sealing model of the air guide chamber is established by using the bonding space theory and the quasi-steady theory,and through the analysis of the relevant structural parameters of the piston,the influence of the structural parameters of the piston groove on the seal of the air guide chamber is obtained.At the same time,the influence of the deformation between piston and chamber wall under different temperature difference on the seal of air guide chamber is studied,and the relationship between temperature and seal and the reasonable range of seal gap are determined.In addition,the initial velocities of projectiles with different sealing structures are calculated.And compared with the actual initial velocity.It provides a way to solve the problem of low initial velocity of projectile caused by gunpowder gas leakage.Finally,in order to solve the practical engineering problems,a virtual prototype model is established based on the analysis of the driving relationship of automata.The driving relationship between piston and drive rod in air guide chamber with different clearance is also analyzed.On the basis of the driving relationship obtained by the virtual prototype,the impact strength of the piston and the driving rod in the air guide chamber at different clearances is analyzed,and the reasonable gap between the driving rod and the piston is determined.Also,the fatigue life of commutator is analyzed.it provides a certain reference significance and engineering application value for the further design and improvement of the driving structure of the revolving automatic mechanical.