NOUFERROUS METALLURGICAL EQUIPMENT

Gas-liquid breaking hammer is a large and efficient mining impact crushing equipment, which is widely used in non-ferrous mining, marine engineering and construction fields. At present, in the mining process of magnesium ore, which affected by the geological and construction conditions, the gas-liquid breaking hammer has the problems of insufficient crushing impact force, low hammering frequency and low power utilization. This paper optimizes the design of the structure and hydraulic system, analyzes the relationship between the performance parameters of the hydraulic cylinder rise and the strike stage by the dynamic model of the hydraulic system, and the parameters of the various operating conditions have been simulated and analyzed by AMEsim on the gas-liquid breaking hammer. The results show that the model of the gas-liquid breaking hammer can solve the curves of velocity, displacement, impact energy, pressure of the hydraulic cylinder with time in the rise and strike stages, and the optimized hydraulic system can effectively improve the crushing impact force and hammering frequency. When the oil supply capacity and stroke length are unchanged, based on the single factor control variable method, it can be concluded that the velocity and impact force of the gas-liquid break increase with the increase of the initial pressure of the nitrogen chamber, and decrease with the increase of the initial volume; the hammering frequency increases with the increase of the initial volume of the nitrogen chamber, and decreases with the increase of the initial pressure.