微涡轮气体轴承测试技术研究进展

微涡轮发动机具有重量轻、尺度小、功率密度高、无需充电等优点，是微型机械设备动力源的最佳选择，具有良好的应用前景。微涡轮发动机的转子直径在十几毫米至几十毫米，设计转速一般在每分钟几十万转至一百万转以上，功率目标在100 W以内。超高速微轴承-转子系统的摩擦与润滑问题是微涡轮发动机面临的瓶颈，目前微涡轮发动机大都采用气体润滑轴承。本文对微涡轮发动机的研究现状进行了分类总结，并重点回顾了气体轴承测试系统的研究成果，对测试技术的发展趋势进行了展望。

Research Progress of Gas Bearing Test Technology for Micro turbine

Micro turbine engine has the advantages of light weight, small scale, high power density and no need of charging. It is the best choice of power source for micro mechanical equipment and has a good application prospect. The rotor diameter of micro turbine engine is in the range of more than 10 mm to dozens of mm. The design speed is generally from hundreds of thousands to more than one million rpm, and the power density target is within 100 W. The friction and lubrication problems of ultra-high speed micro bearing rotor system are the bottleneck of micro turbine engine. At present, gas lubricated bearings are mostly used in micro turbine engines. In this paper, the research status of micro turbine engine is classified and summarized, and the research results of gas bearing test system are reviewed, and the development trend of test technology is prospected.