Main vibration and vibration isolation mechanism of a vibration mill with two-level partial blocks

To break through bottleneck problems that materials were agglomerate and not refined in current ultrafine pulverization operations,main vibration and vibration isolation mechanism of a vibration mill with two-level partial blocks under strongly nonlinear excitation were analyzed.The variable pitch rubber coating composite spring with nonlinear hard-features was used in the main vibration system of the model machine whose stiffness could change along with the change of vibration intensity to meet the requirements of energy-saving and stable.The canvas rubber ring composite spring with high internal damping was adopted in the vibration isolation system,so that most of the high vibration intensity transmitted by the main vibration spring could be absorbed by the vibration isolation system.The time domain curve of acceleration and power spectrum curve showed the absorption of high vibration intensity and the nonlinear effect of vibration isolation.This study solved some problems of gathering super-fine particles and grain refinement,and broke through the status that the super-fine grinding of super-hard powder remained at the micron level.An achievement was obtained with the input particle size of d(0.5)=10μm while the output particle size of d(0.5)=0.172μm.