【作者】 张巧文；

【导师】 齐秀丽；

【作者基本信息】 山东科技大学 ， 机械制造及其自动化， 2008， 硕士

【摘要】 挠性摩擦传动是利用摩擦原理实现机械传动的一种重要形式,它具有结构简单、传动平稳、缓冲吸振、易实现远距离传输等特点,在工业生产中得到广泛应用。但由于挠性摩擦传动受摩擦副、接触特性及表面材料特性等多种因素的影响,容易出现打滑、蠕动、传动比不恒定等现象,甚至发生安全事故,因此研究摩擦传动对国民经济发展具有重要意义。本课题以重要的散料运输设备带式输送机为载体,目的在于通过传动滚筒覆层弹性体表面结构的研究实现增摩防滑的作用,改善运行安全状况,提高运输效率。论文在对已有的摩擦传动理论和滚筒的生产状况进行分析研究的基础上,提出了一种传动滚筒覆层弹性体表面结构设计的新思路。综合运用了非光滑表面(粗糙度)、结构仿生、真空吸附等理论,由壁虎脚掌良好的摩擦粘附性能得到启示,根据刚毛与蘑菇外形相似性进行改型,并联系真空吸盘吸附作用,经过合理的结构衍化、修改,形成独特的表面形态,即圆台形凹坑状的表面结构。利用MATLAB对该结构进行了数学建模和计算机模拟,运用UG进行了几何三维实体建模。采用有限元分析软件ABAQUS对所设计结构的摩擦性能进行仿真分析,经过比较得出研究设计的新型覆层结构具有一定增摩作用。通过研究表明从传动滚筒覆层弹性体表面结构入手研究摩擦表面接触特性对摩擦传动的影响是可行的,并且其研究成果对于摩擦传动理论和运输设备的进一步发展能起到重要作用,有利于国民经济的繁荣稳定。更多还原

【Abstract】 In the industrial production, flexibly frictional transmission is an important form of mechanical transmission making use of friction principle. It is widely used for its advantages of simple structure, steady transmission, buffering, vibration absorption, remote transmission and so on. However, the problems of slip, creeping, variable rate of transmission and even accidents often occur in flexibly frictional transmission due to the many factors affecting it such as friction pair, contact property, materials and so on. So the study on frictional transmission is of great significance to national economy.Based on bulk transportation equipment-belt conveyor, the research objective is to better the tribology performance of driving drum by research on surface structure of drum’s elastic coating, which can improve the safe operation condition and transportation efficiency.After analysis on existed frictional transmission theory and drum production development, a new thought is projected of surface structure design of drum’s elastic coating. On the base of concept of non-smooth surface (generalized roughness), bionic structure and vacuum absorption, enlightenment is derived from the friction and adhesion performance of gecko sole and modification of the sole seta’s structure is made according to the shape similarity with mushroom and vacuum sucker. Then a kind of coating structure of dent with truncated cone shape is finally designed after reasonable evolvement and modification. The computer simulation of final surface structure is made by MATLAB software based on Mathematical model built in this paper while the 3D model is built by UG software. The tribology performance of the new structure designed is simulated and analyzed by finite element software ABAQUS. It is proved that the new coating structure has effect on increasing friction force and improving tribology performance.The research shows that it is available to study on the effect of contact property of friction pair surface on frictional transmission. What is more, the product is of significant use for the further development of frictional transmission theory and transport equipment which is benefit to prosperity and stability of national economy.更多还原