A Microfabricated Spiral-Groove Turbopump Supported on Microball Bearings
A Microfabricated Spiral-Groove Turbopump Supported on Microball Bearings
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DOI：
10.1109/jmems.2009.2035525
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发表时间：
2010-02-01
影响因子：
2.7
通讯作者：
Ghodssi, Reza
中科院分区：
文献类型：
--
作者：
Waits, Christopher Mike;McCarthy, Matthew;Ghodssi, Reza
报道了一种微型涡轮泵的研制，这种泵能够以便携式发电所需的流量和压力输送液体燃料。该装置由径向入流微型涡轮驱动的螺旋槽粘性泵和新开发的封装微球轴承支撑组成。平面接触轴承滚道采用直径为285 μ m的440 C不锈钢微球。与以前的设计相比，对滚道几何形状的修改使微型涡轮机能够以高达87 000 r/min的速度重复运行，在超过6 h和380万转的情况下，性能变化可以忽略不计。已经证明了以水作为工作流体的泵送，流量为10-80 mL/h，压力上升至8.2 kPa。这是第一个采用封装微球轴承支撑机构的应用，使用接触轴承实现超过50 000 r/min的转速，并证明超过100万转的可靠运行。[2009-0123]
The development of a microfabricated turbopump that is capable of delivering liquid fuel with the flow rates and pressures required for portable power generation is reported. The device is composed of a spiral-groove viscous pump driven by a radial in-flow microturbine and supported using a newly developed encapsulated microball bearing. A planar-contact bearing raceway is employed using 285-mu m-diameter 440C stainless steel microballs. A modification to the raceway geometry, as compared to previous designs, has enabled repeatable operation of the microturbine at speeds up to 87 000 r/min, showing negligible variations in performance for over 6 h and 3.8 million revolutions. Pumping has been demonstrated with water as the working fluid for flow rates of 10-80 mL/h and pressures rises of up to 8.2 kPa. This is the first application to incorporate an encapsulated microball bearing support mechanism, to achieve rotational speeds in excess of 50 000 r/min using a contact bearing, and to demonstrate reliable operation of more than 1 million revolutions. [2009-0123]