【作者】 尹跃峰；

【导师】 李大磊；

【作者基本信息】 郑州大学 ， 机械制造及其自动化， 2013， 硕士

【摘要】 物料的粉碎作业是许多基础工业部门不可缺少的工序之一,根据料层破碎原理研制新型节能高效破碎机,实现物料的多碎少磨,对于破碎机的发展具有重要意义。本文综述了国内外各种破碎设备的发展现状,并对破碎机强度和动态性能的研究作了分析,在充分调研和论证的基础上,借鉴同类采用料层粉碎原理的破磨设备确定了破碎机的破碎方案和破碎产能参数,总结已申报专利并应用到生产现场的碾压式平盘锥辊破碎机在使用中振动大、易出故障的原因,对其结构进行了改革性创新,设计出“一架压三辊”的独特架构,以及耐磨层便于固定的破碎锥辊和方便修整碾压盘面的车削装置,使得破碎机的稳定性能和维修难度大大改善。利用SolidWorks软件设计完成新型盘辊破碎机虚拟样机的总体结构设计,为后续关键件的静力学分析和动态性能研究奠定了基础。采用破碎功耗理论确定该破碎机的驱动功率,并对相应配套的的传动装置进行了设计计算,最大程度的降低功耗比。由于星形架在破碎机运行过程中承载着来自上部加载液压油缸和下方物料对锥辊的冲击载荷,其承载能力和动态性能对破碎机整体性能至关重要。本文应用ANSYS Workbench对星形架进行了有限元静强度分析,得出星形架在满载极限工况下的应力值和变形情况,结果表明星形架的强度和刚度富余很大,因此对星形架结构进行了改进设计并对改进结果作了验证；然后对已改进的星形架结构进行有限元模态分析,获得其前8阶固有频率和模态振型,并与破碎机自身的可能激励振源的固有频率进行对比,模态分析的结果反映了星形架各部分振动的强弱分布及其在相应模态下的弯曲变形、扭曲变形和弯扭复合变形等的振动响应,可为以后星形架结构的进一步改进设计提供参考依据。本论文关于该新型盘辊破碎机的研制及其关键部件性能的研究思路,对该破碎机性能的进一步提高具有非常重要的指导作用,同时也为其它同类型设备的研发奠定了一定的理论基础。更多还原

【Abstract】 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.更多还原