The Simulation And Optimization Of The Loop Mechanism And The Connecting Mechanism Of The Elastic Shell

For Self-propelled artillery, the ammunition feeding machine is an important part of weapon system. It Mainly consists of the loop chain mechanism and the shell cushioning mechanism. Its main function is to store, select and buffer the shell. The movement performance of the loop chain mechanism affects the transmission precision of the shell and the service life of the mechanism. The performance of the shell cushioning mechanism has a direct impact on the cushioning effect. In this paper,ADAMS and AMESim are used to simulate and optimize the performance of the loop chain mechanism and the shell cushioning mechanism.First of all, the structure and the principle of the loop chain mechanism and the shell cushioning mechanism are analyzed deeply, and then the related parameters of the two mechanisms are calculated. According to the reducer ratio diagram, output speed and reduction ratio of the loop chain mechanism are calculated. Gear shifting pin teeth are computed with the speed of a circumferential force. Finally, the circumferential force substitution strength check type was used in the calculation of pin gear shaft and the gear bending strength and contact strength, to ensure that both meet the strength requirements. To pick spring mechanism according to the elastic structure diagram of mechanism is calculated, the maximum angle parameters of buffer stroke mechanism. By the above calculation is related to the mechanism, for the next step to prepare the simulation model parameters.Using software ADAMS to establish the simulation model of the loop chain mechanism, to measure the center displacement, pin gear and track force of the cartridge, so as to determine the existence of the mechanism in the process of motion.In order to observe the meshing condition of gear and pin gear and find the cause of the problem, the original model is converted to a single wheel drive model according to the transmission principle of the circular chain mechanism, The tooth profile equation is obtained by using the tooth profile equation to optimize the tooth profile,Then the gear wheel radius and the radius of addendum circle radius and the radius of addendum circle are solved by the involute tooth profile in the condition of no interference and coincidence degree, and the new involute gear is designed by the range of value. Finally, the optimization mechanism and the original mechanism are tested by simulation and experiment, in order to verify the performance of the optimized mechanism.Using ADAMS and AMESim to establish the mechanism of mechanical parts and hydraulic parts, through the interface to achieve the movement of the entire mechanism simulation. The buffer performance of the mechanism is obtained by the simulation results, and all the parameters affecting the performance of the mechanism are analyzed by the structure composition and the movement principle of the mechanism. Sensitivity analysis was used to analyze the sensitivity of the parameters,and the main parameters were found. A series of simulation experiments are carried out in the range of main parameters, and the optimal parameters are found by comparing the simulation results. The optimal parameters are obtained to reconstruct the mechanism. Finally, the buffer performance of the optimized mechanism is verified by experiments.