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.
[1] 刘晓东, 汤周斌. 茶叶杀青机与制茶品质特点[J]. 广西农学报, 2006, 23(3): 22.
[2] Ying-Jie Chen, Ping-Chung Kuo, Mei-Lin Yang, et al. Effects of baking and aging on the changes of phenolic and volatile compounds in the preparation of old Tieguanyin oolong teas[J]. Food Research International, 2013, 53(2): 732-743.
[3] 周国义, 魏鼎福. 茶叶杀青机的发展及特点[J]. 现代农机, 2013(2): 38-39.
[4] 权启爱. 我国茶叶机械化的发展现状与展望[J]. 中国茶叶, 2006(6): 4-6.
[5] 权启爱. 茶叶杀青机的类别及其性能[J]. 中国茶叶, 2006(4): 12-13.
[6] 孙少华, 张文斌, 张龙全, 等. 茶叶杀青没备比较研究[J]. 中国农机化, 2010, 47-50.
[7] 吴卫国, 谢昌余. 茶叶电热滚筒杀青机的研究[J]. 中国茶叶加工, 2009(1): 30-31.
[8] Zheng Zhenyao, Dong Jiyang, Zhong Chen.Process control for the tea baking[C]// The 14th International Conference on Mechatronics and Machine Vision in Practice. Xiamen: IEEE. 2007: 18-22. DOI: 10.1109/MMVIP.2007.4430707.
[9] Zheng Zhenyao, Cao Zhikai, Jiang Qingyin, et al. Application of vector frequency converters in tea baking time contro[J]. Chinese Journal of Scientific Instrument, 2005, 25: 868-869, 872.
[10] 石怀荣, 芮延年. 新型锥体式花生碎壳机构的设计[J]. 农机化研究, 2011, 33:111-114.
[11] 丁乔, 张国安, 申建英. 螺旋挖沟机中变导程正螺旋面的算法研究[J]. 东北农业大学学报, 2004, 35(1): 55-57.
[12] 刘平安. 锥齿轮螺旋千斤顶设计[J]. 机械设计与研究, 1996, 2: 35-36.
[13] 龚琦. 茶叶杀青界面条件研究[J]. 茶叶机械杂志, 1997(4): 2-4.
[14] 郝朝会, 孙传祝, 苏夏侃. 自适应模糊PID控制在茶叶杀青机中的应用[J]. 农机化研究, 2013(2): 201-204.
[15] 高霞. 条形茶叶加工机械的作业质量指标与评价[J]. 安徽农学通报, 2013, 19(20): 108-109.
浙公网安备 33019902000101号 
