Research On Comprehensive Performance Of Double Excitation Dynamic Balance Inertia Cone Crusher

The inertia cone crushe plays a vital role in secondary and tertiary crushing stages of granular materials,which is widely used in mining,highway,chemical industry,smelting,etc.With the development of crushing process towards “more crushing and less grinding”,the new requirements such as high efficiency,high quality and low cost are put forward for inertial cone crusher.However,the structural principle of inertial cone crusher causes the problems of large amplitude and high no-load energy consumption.In addition,there is a lack of in-depth research on simulation and performance optimization of load operation for inertial cone crusher.Only the test method can be used to control performance indexes,and the excessive pursuit of single index optimization has resulted in the decline of the comprehensive performance of the whole machine and the increase of R & D cost.This paper focuses on how to calculate the amplitude and energy consumption of the whole machine more accurately,the effective vibration and consumption reduction strategy,and the numerical simulation and performance optimization model.The numerical simulation of double excitation dynamic balance damping structure and operation performance is deeply studied through the combination of theoretical analysis,experiment and numerical simulation,which provides a theoretical basis for the development of new and efficient inertial cone crusher s and crushing technology.Based on the multi-body dynamic method,the dynamic model of the crusher is established,and the amplitude and vibration energy consumption are solved.The effects of exciter speed,nutation angle and fixed cone mass on the amplitude and energy consumption are discussed.The analysis shows that under the condition of large amplitude,increasing the fixed cone mass can reduce the amplitude and energy consumption.In addition,the increase of nutation angle and speed will increase the amplitude and energy consumption.A double excitation dynamic balance structure optimization strategy is proposed to eliminate the amplitude and energy consumption.The principle prototype shows that the structural optimization strategy can effectively reduce the amplitude and increase the crushing force.The multi-body dynamic model of dynamic balance crusher is established and compared with the amplitude and energy consumption of single excitation crusher.The results show that the amplitude,vibration energy consumption and mass of the dynamic balance crusher are reduced by 75%,80% and 50% respectively.In order to clarify the motion and crushing behavior of particles in the crushing chamber,the trajectory model is established through the combination of layered crushing characteristics and differential equations of falling modes.Using the trajectory model and the variation relationship of compaction bulk density of each layer,a calculation method of actual compression ratio is proposed,which can accurately represent the fragmentation degree in the crushing layer.A more accurate productivity calculation model considering the distribution of filling density in the layer is established,and the effects of rotating speed and nutation angle on the productivity of crusher are discussed.The analysis shows that the productivity will decrease with the increase of rotating speed or the decrease of nutation angle.A inter-particle breakage operation model is established based on selection,crushing and bulk density function.The model considers the influence of actual compression ratio,particle size distribution coefficient and particle size relative coefficient.The particle size distribution of crusher products is predicted by using the trajectory and breakage operation model in the chamber.The analysis shows that the increase of speed or nutation angle will effectively improve the particle size of crusher products.The functional relationship between crushing pressure and actual compression ratio and particle size distribution coefficient is clarified through the force test of inter-particle breakage behavior.The actual pressure distribution angle is introduced to obtain the load distribution on the moving cone surface,and the inter-particle breakage energy consumption suitable for inertial cone crusher.A calculation model of energy consumption is established for inertial cone crusher.Based on the material load distribution and the theoretical crushing force calculation model,a calculation method of nutation angle of inertial cone crusher considering the variation of working crushing force is proposed in this paper.Combined with the mathematical models of crusher productivity,particle size distribution and energy consumption,the comprehensive performance simulation of load operation of inertial cone crusher is realized.In addition,the iterative calculation method of curve cavity shape optimization of inertial cone crusher is modelled.Based on the augmented multiplier method,the multi-objective optimization problem of inertial cone crusher with constraints is modeled and numerically solved.Finally,the performance indexes before and after optimization are compared in the industrial test of GYP1200 crusher.The measured optimized production rate is increased by 26.6%,the calibrated discharge particle size is increased by 5.6% and the energy consumption power is reduced by 16.2%,so that the comprehensive performance of the crusher remains in the best state.