Fabrication of Key Components in Micro Turbine Engine by Using Micro Electrical Discharge Machining (EDM)
The key components of micro turbine engine including micro air bearing and an integrative micro-rotating shaft that connected with a micro-compressor and a turbine were designed and fabricated. Nickel alloy (GH4169) was chosen as the material due to its high temperature resistance, instead of traditional nonmetal material. They were machined by multiple microEDM technologies, such as micro-shaft with micro-EDM grinding, micro compressor and turbine with micro-EDM milling, and micro air bearing with micro wire electrical discharge machining. The surface quality and precision acquired by these methods was very good. The diameters of micro-compressor and turbine were both 2.8 mm, and the height of each blade was 0.4 mm, 0.2 mm of thickness. The shaft was 1.2 mm of diameter and 2.0 mm of length. The micro gas journal bearing had 18 wedges, and 1.28 mm of inner diameter. The height of each wedge was 40 μm. The maximum rotating speed of micro turbine was about 40,000 rpm.
Micro-EDM milling Micro turbine engine Gas bearing Micro-EDM grinding
Zhaoqi Zeng Yukui Wang Yinghuai Dong Zhenlong Wang
Key Laboratory of Micro-systems and Micro-structures Manufacturing (Harbin Institute of Technology), State Key Laboratory of Precision Measuring Technology and Instruments Centre of MicroNano Manufactu
国际会议
The 16th International Symposium on Electromachining(第16届国际电加工会议)
上海
英文
587-591
2010-04-19（万方平台首次上网日期，不代表论文的发表时间）