【作者】 程胜文；

【导师】 杨光；

【作者基本信息】 武汉理工大学 ， 机械设计及理论， 2003， 硕士

【摘要】 碾米工业是我国粮油工业的重要组成部分，碾米机械作为粮食加工机械中的主要机械之一，对产品的要求主要是加工出的成品米表面光洁、碎米少、含糖、含糠、含谷量低，出米率高、电耗低以及安全、可靠耐用等。要达到以上要求，对于国产碾米机最主要的问题之一就是碾米机主轴的动平衡问题。碾米机主轴部分是碾米机械的关键部件，其结构形状比较复杂，存在多处原始的动不平衡因素，正是由于这种动不平衡造成了碾米机的振动加剧、噪声增加、成米精度差，而且还加剧了零件的磨损，降低了产品的使用寿命。因此，对碾米机主轴部件进行动力学分析，解决碾米机的动平衡问题，对我国的碾米机制造业有着重要的理论意义和实用价值。 本文首先综合介绍了分析、计算转子振动及振动机理的方法，并利用临界转速的有限元法，采用ANSYS软件对PM15—抛光米机主轴进行了动力学分析，得出了该机型主轴的动力特性及振动状态。并针对碾米机在使用过程中主轴轴承寿命的离散性，分析了影响轴承寿命的因素。同时，利用动平衡解耦原理对碾米机主轴的去重积进行理论分析和计算。最后，对碾米机主轴部件的动平衡工艺进行了分析。更多还原

【Abstract】 Rice mill industry is the important component of our national provision Industry. Rice mill is one of the master machines of the art factitious machine. The output are required that the rice surface is ganoids, the fractional rice, rice bran , rice sugar and grain is the minimum, the machine are required highly efficiency. In order to adjust the request, the major problem is that, the dynamic balancing of the Rice mill shaft is not resolved. Rice mill shaft as the important component of the machine, have some original not dynamic balancing on its complicated structure. It leads to the machine become more vibration, yawp, abrasion, shortening parts" life and low precision. So based on the kinetic analysis of the Rice mill shaft, to resolve the dynamic balancing problem, it has very important theory and practicality signification for the rice mill manufacturing.In this paper, there are introducing the analysis and calculate of the rotor vibration theory. The shaft kinetic analysis of PM15-GM (Rice mill) is done by ANSYS 5.7, its structural dynamic character and vibration state is calculated. In allusion to the default that the bearing life is shorten during using, it is specially researched to the bearing life calculation theory and the method which is to increase the bearing life. On the other hand, the reducing theory by dynamic balancing anti-coupling principle is researched in the page.At last, this paper analysis the dynamic balancing, technics of the rice mill shafts.更多还原