气垫带式输送机机理及应用研究

【作者】 陈苏明；

【导师】 刘金华； 阮海北；

【作者基本信息】 武汉理工大学 ， 机械工程， 2002， 硕士

【摘要】 气垫带式输送机是一种新型连续输送设备。它用气室盘槽替换托辊，以气垫支承输送带，变输送带与托辊间的滚动摩擦为输送带与气垫间的滑动摩擦，具有运行平稳、耗能小、维修方便等优点。 尽管气垫机已被普遍使用。但迄今为止，对气垫机的气膜形成、盘槽形式、气孔分布等理论分析与研究还不够深入，只是在常规设计和试验的基础上进行设计制造，许多参数之间的关系还没能确定。近十几年来，国内外生产的气垫机都出现过由于主参数确定不合理引起输送效率不足，输送带摩擦盘槽等质量问题，给用户造成很大损失。因此对气垫机做进一步机理和应用研究是十分必要的。 本文对气垫机作了机理研究，描述了气垫机的结构型式及工作原理，对气垫机的主参数作了理论分析，根据平行平板间的径向流动理论，建立了计算模型，导出了计算公式，可作为气垫设计理论的依据；提出了气孔布置的原则：纵向孔间距相等较好，横向孔径不等为佳，横向孔排距可以相等，也可以不相等，但一般小于孔间距。气孔排数应为奇数，由中心两侧呈对称布置，孔径由中心向两旁逐渐减小。气孔布置还受输送效率、物料特性、运行速度、工作环境等因素的影响。在此基础上对风机的主参数、盘槽结构型式等进行了计算机优化设计。本文所研究的成果已应用于本人负责研究开发的、应用于大连港大窑湾散粮工程中的气垫机中，取得较理想的效果。更多还原

【Abstract】 Air-cushion conveyer is a new type uninterrupted transfer equipment, utilizing spiral-slot in the air chamber as a replacement for bracket. The cushion supports the convey belt, converting slide friction between the belt and the bracket into slide friction between the belt and the cushion. It features stable running, low power consumption, easy maintenance, etc.Nonetheless this kind of cushion-shape machine has been widely used, such theories as air layer formation, spiral-slot style, pores arrangement requires further analysis and research since the machines are only manufactured based on common, design and test so far and many relations among the data have been fixed yet. And a lot of quality problems have been reported in over 10 years application both nation-wide and worldwide, like insufficient convey efficiency, friction between convey belt and the slot, causing severe damages of the operator. And all these problems just arose out of unreasonable data setting. In this case, further mechanism and application research becomes crucially important.The article below deals with the mechanism research of this kind of machine, describing the structure and principle; theoretically analyzing the data to derive formula; tentatively proposing theory of radial flow between parallel plates for future design; pores arrangement, i.e., longitudinal pores are equally spaced, horizontal pores bore size is preferred unequal and rows distance can be either equal or not but generally smaller than pores distance, and rows shall be odd numbers and are arranged symmetrical from the center row and bore size reduces gradually from the center row. The arrangement shall also take transfer efficiency, conveyingmaterial features, conveying speed, surrounding environment, etc. into consideration. Plus, application research has also been made, key blower data have been designed by computed optimization, spiral-slot style is well chosen. Some practical application examples illustrate the air-cushion conveyer designed by myself, which has been in service in Dalian Dayaowan Scattered Provision Project.更多还原