某烟草加香加料机的设计与仿真研究

【作者】 王栋梁；

【导师】 周克栋；

【作者基本信息】 南京理工大学 ， 机械设计及理论， 2011， 硕士

【摘要】 烟草的加香加料是卷烟生产过程中的一道重要工序,是改善卷烟吸味品质和保持卷烟风格的重要保证,而加香加料机的性能直接决定着烟叶在加香加料过程中的物性变化(如破碎率、温湿度)、烟叶受料受液的均匀性,以及料液的使用效率等。本文对目前国内外广泛使用的德国KAS加香加料机进行了详细的研究调查,分析了其存在的缺陷,并在其基础上创造性地提出了立式气动混合的新方案,设计了完整的设备结构,针对气动混合原理的可行性进行了原理样机的设计、制造、实验及仿真研究,具体工作如下：(1)总体方案设计通过对KAS加香加料机及一些传统混合机械、食品加工机械的研究,提出了以气动混合方式代替原KAS机机械混合的方式进行加香加料的总体方案,确定了气动混合加香加料机的功能模块及工作流程；详细设计了加香加料机的各个功能模块子系统,主要包括进出料系统、筒体、布风系统、加香加料系统、热风循环系统等；应用流态化原理和气力输送原理计算确定设备的总体参数。(2)试验样机的设计及试验研究针对气动混合加香加料的可行性研究进行了试验样机的工程设计与研制,开展了相应的试验研究工作；根据流场的仿真计算结果与分析结果研究了两种不同孔板开孔方式对筒内气流的影响；根据在试验中发现的问题,分析了试验样机出现不良气泡特性的原因,提出了试验样机布风室的改进措施,并通过理论计算和实验验证了所提改进措施的有效性。(3)片状颗粒两相流场的数值模拟由于片状颗粒两相流理论尚不成熟,本文探索性地将颗粒轨道模型应用于片状颗粒两相流场的研究,用形状系数对片状颗粒进行了修正,并采用双耦合计算方式进行了颗粒轨道的确定,仿真结果与试验结果吻合良好。本文通过原理样机研制、试验研究与数值仿真相结合的研究方法探索了立式气动混合加香加料的技术途径,原理具有可行性,研究成果为进一步实施工程样机奠定了良好的技术基础。更多还原

【Abstract】 The casing and flavoring is a very important processing procedure of the cigarette production because it is the guarantee of the cigarette smoking quality and style, and the performance of the casing and flavoring machine is the key to the physical change (such as the breakage percentage, temperature and humidity) and the uniformity of the casing and flavoring as well as the use efficiency of flavor liquid during the process. In this article, a detailed investigation of the Germany KAS widely used presently was made, and its defects were analyzed. Based on the above work, a new type scheme of vertical air mixing was proposed, and the complete device structure was designed. Besides, a test prototype was designed and made, and the feasibility of the air mixing manner was simulated and verified.The specific works as follows:(1) Design of overall schemeA new type of vertical air mixing program was proposed based on the researches on the traditional mixed machinery and food processing machinery, the detailed function parts was designed, mainly including the in-out tobacco system, cylinder, air distribution system, casing and flavoring system and hot air circulation system. Additionally, the general parameters of the machine were calculated with fluidized bed principle and pneumatic conveying theory.(2) Design and researches on test prototypeA test prototype was designed and manufactured, and the corresponding experiments were carried out. The feasibility of the air mixing manner was verified. A contrast of two different orifices was made based on the simulation and analysis of the flow field. Besides, an analysis of poor bubble characteristics was made based on the problems found in the experiment, and an improvement of the air distribution room was made and the effect of the improvement was proved both in the theoretical calculations and experiments.(3) Simulation of the flaky particles-air two-phase flow fieldThe DPM model was used for the researches on flaky particles-air two-phase flow field as there was no mature theory for it. The shape factor was used to correct the calculation, and the orbit of the flaky particles in the air flow field was determined with double coupling, the simulation result was in good agreement with experiment result.In this paper, theory and experimental studies are carried out on the feasibility of the new type of vertical air mixing manner, the results showed that it has feasibility. The studies established the foundation for the development of the engineering prototype.更多还原