滚筒式茶叶杀青机导叶板螺旋运动模型研究

Investigation on Guide Vane Motion Model for Cylinder Tea Fixation Machine Based on Logarithm Spiral Line

为减少滚筒式杀青机中螺旋导叶板设计的盲目性,缩短设计周期,提高设计精度,分析了对数螺旋线的螺旋角对滚筒式杀青机生产均匀性的影响规律。在导叶板螺旋运动分析基础上,提出了分段设计导叶板的方法,并采用流体分析软件Fluent对滚筒杀青机筒内流场进行仿真分析。通过研究杀青叶在仿真固定螺旋升角与分段设计的导叶板在杀青机稳定工作时的受热状况,以及杀青叶在滚筒中的推送情况,验证了分段设计导叶板结构可以有效提高绿茶的杀青品质。

Fixation is one of the key processes in green tea manufacturing, and in the cylinder fixation machine, the guide vane has important role on pushing and throwing the fixing tea leaves, which showed a great influence on the tea taste. In this paper, the helix rise angle of guide vane in tea cylinder fixation machine was analyzed based on the logarithm spiral line, which showed great influence on the uniformity of green tea production. The Fluent software is used to do simulations under the fixing leaves heating condition and pushing situation in the cylinder tea fixation machine under the fixed and subsectional design helix rise angles, respectively. With the simulations, the subsectional design structure can effectively improve the green tea quality. This analysis can guide the design in the cylinder fixation machine, to shorten the design cycle, and to improve the design accuracy.