Research On Micro-Reserve Power Activation Mechanism

With the continuous update of industrial technology,the situation of modern war is more and more complicated,more and more technologies are widely used in the military field in the world,the destruction and killing ability of modern weapons is increasing,and the battlefield space is becoming more three-dimensional and multi-dimensional,so the development of small grenade has become an important research field of various countries.Micro fuze and fuze power activation mechanism directly determine the killing ability of ammunition.Therefore,this paper takes the special type grenade as the background,mainly focuses on the traditional fuze power supply and activation mechanism of large volume,weak ability to perceive the environment and need to be in high overload conditions and other shortcomings.In this paper,a new power activation mechanism is designed on the basis of lightweight,miniaturization and low overload.The mechanism integrates the mechanical activation part with the reserve chemical power supply,reducing the overall size of the power supply and the activation mechanism to a certain extent.The reaction discharge between the electrolyte and the electrode pile after the liquid storage cylinder is used as the activation basis,and the resistance of the inertia spring is used to identify the load during service processing and the load under the launching condition.Realize the activation mechanism to the external environment perception ability.In order to provide the theoretical basis of the activation mechanism,the working principle of the micro power supply activation mechanism is studied in this paper,and the model of the micro reserve power supply activation mechanism is established combining with the corresponding technical requirements and mode of action requirements.The activation mechanism is analyzed theoretically and calculated by simulation and Adams dynamic simulation analysis is used.According to the position and motion of each part inside the activation mechanism,the motion pair and the constraint pair between each part were defined.The dynamic simulation was carried out in the backseat environment with 1000 g rear acceleration and the reliability under the drop overload environment.ANSYS finite element analysis was used to calculate the stress distribution and breakage of liquid storage cylinder under discharge overload.The dynamic test of the activation mechanism was carried out through the impact test method,and the impact test platform was used to simulate the overload environment of the projectile during the actual launch.It was verified that the power activation mechanism could reliably release the safety under the condition of 1000 g rear-loading,which met the requirements of the reliable release insurance of the activation mechanism.From 1.5m to soft and hard targets respectively,the activation mechanism did not appear to release the insurance,and the liquid storage bottle did not break,which verified the security of the activation mechanism’s service handling.The reliability of chemical battery was tested by static discharge chemical test.