Development Of New Star-shaped Plate-rolling Crusher And The Characteristic Research Of Its Critical Component

The crushing process of materials is an indispensable process of many basic industry department, so it is of great significance for the development of the crushers to develop new types of energy-saving and highly efficient crusher to realize the more crushing and less grinding target of the crushing materials.This thesis summarized the current development situation of various crushing equipment at home and abroad, and analyzed the research on the strength and dynamic performance of the crusher. On the basis of fully research and demonstration of the crushers, the crushing project and parameters of the crusher were fixed, referring the material layer crushing principle of similar grinding equipment. Analyzing the reason of vibration and breakdown of roller-type plate-and-cone-roller crusher already applied for patent and being in application, we made a reformational innovation on the structure of crusher and designed the unique structure that a star-shaped frame pressed three crushing rollers. In the meanwhile, the wear-proof layers of cone crushing roller were easily fixed and the turning device made the plate turning conveniently. The above all structures made the stability performance and maintenance difficulty of the crusher get greatly improved. Using Solid Works software to design the overall structure of the virtual prototype of the new kind plate-rolling crusher laid a foundation for the subsequent static analysis and the dynamic performance study of the critical component. It applied the theory of broken power consumption to determine the driving power of the crusher and designed the corresponding transmission device. Because the star-shaped frame bore the upper load from the hydraulic oil cylinder and the impact load during the materials and the cone rollers at the bottom, its bearing capacity and the dynamic performance were essential for the crusher performance. This thesis performed a finite element analysis on the static strength of the star-shaped frame by ANSYS Workbench software to get the stress and deformation distribution. The results indicated that the strength and stiffness of star-shaped frame was more than enough, so we made an optimization for the star-shaped frame structure and verified the results of improvement. Then the finite element modal analysis of the optimized star-shaped frame was made, obtaining the first eight orders natural frequencies and vibration mode shapes which were compared with the natural frequencies of the possible incentive vibration sources in crusher itself The results of modal analysis reflected the vibration distribution in different parts of star-shaped frame and its vibration response such as deformation, distortion and compound deformation under the corresponding mode, which could provide some references for the future structure optimization of star-shaped frame.The research thoughts about the development of the new plate-rolling crusher and its critical components’performance played a key role in guiding to improve the performance of this crusher, also provided some theoretical basis for the development of other similar equipment.