Optimum Design of a Saw-Tooth-Shaped Dental Air-Turbine using Design of Experiment
Optimum Design of a Saw-Tooth-Shaped Dental Air-Turbine using Design of Experiment
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DOI：
10.1007/s12541-014-0329-6
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发表时间：
2014-02-01
影响因子：
1.9
通讯作者：
Song, Dong Joo
中科院分区：
文献类型：
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作者：
Juraeva, Makhsuda;Ryu, Kyung Jin;Song, Dong Joo
空气涡轮高速手机用于牙科切割已有40多年的历史。空气涡轮是牙科手机的主要部件。高压空气进入涡轮机并撞击叶片以驱动涡轮机转子。利用有限元分析软件Ansys CFX，研究了叶片结构对空气涡轮优化设计的影响。研究的目的是找到一种优化设计的空气涡轮叶片结构，以增加扭矩。采用试验设计方法对水轮机进行了优化设计。以叶尖宽度和叶片夹角为设计变量，通过改变涡轮叶片的形状来分析空气涡轮内部的气流情况。用Minitab生成涡轮的变量，并用扭矩进行评估。得到了不同叶片形状下的压力分布和扭矩分布，并进行了分析。通过方差分析，分析了设计变量对空气透平性能的影响。通过比较不同涡轮叶片的扭矩值，对叶片形状进行了优化。当叶片顶端宽度为0.2 mm，叶片夹角为80度时，得到了最优设计变量。
Air turbine high-speed handpieces have been used in dental cutting for more than 40 years. The air turbine is main part of the dental handpiece. High-pressure air enters the turbine and strikes the blades to drive the turbine rotor. The effects of the air-turbine blade configuration were investigated for the optimum air-turbine design by using ANSYS CFX. The objective of the research was to find an optimum design of the air-turbine blade configuration to increase the torque. Design of Experiments was used for the optimization process of the turbine. The airflow inside the air turbine was analyzed by changing the shape of the turbine blade using the blade tip width and angle of the turbine blade as the design variables. The variables of the turbine were generated by Minitab and evaluated by the torque. The pressure distribution and torque were obtained and analyzed for each blade shape. The influences of the design variables on the air-turbine performance were analyzed by Analysis of Variance. The blade shape was optimized by comparing the torque values of the various turbine blades. The optimum design variables were found when the blade tip width and angle of the blade were 0.2 mm and 80 degrees, respectively.