At present,the mixing process of solid propellants mainly relies on experience,and lacks the safety assessment com-bining the mechanical properties of the mixing system with the ignition mechanism of energyrtic materials.According to the theory of friction-induced ignition of energy-containing materials and referring to the decomposition reaction mechanism,a safety assessment method of the mixing process based on the friction ignition model was proposed,and a computational model was established to simu-late and study the influence of the friction heat-generating process on the ignition time.The calculation method of friction energy was determined,and the formula of mixing friction energy and mixer paddle speed was derived and established by combining the structur-al parameters and process parameters of the mixer,so that the friction energy was taken as an evaluation index of the safety of the mixing process.The friction energy of the corresponding mixing process was calculated by using the actual production data of medi-um-sized mixer,and the data of explosion process of a certain type of mixer was used for checking;finally,the friction energy of me-dium-sized mixer was used to derive the process parameters of large-scale mixer,and the reliability verification experiments of the process parameters of the large-scale mixer were carried out.The results show that:the torque values deduced from the friction energy formula are all less than the safe torque value of 2521.91 N·m.Under different load conditions,the actual torque values detected are all less than the safe torque value of 11593.44 N·m of the large mixer,and the actual friction energy of the large mixer is close to the friction energy of the medium-sized mixer.The maximum friction energy is 2089.06 W/m2,which verifies the reliability of the process parameter derivation method.The mixing friction energy calculation method provides a new reference for the safe and efficient formulation of mixing process parameters and production of propellants.
国家科技期刊平台
NSTL
万方数据
