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航空学报  2013 

滑油系统全流量磨粒在线监测静电传感技术研究

DOI: 10.7527/S1000-6893.2013.0316, PP. 1786-1794

Keywords: 航空发动机,润滑系统,在线监测,数学模型,空间灵敏度

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Abstract:

在滑油系统全流量磨粒在线静电监测中,针对缺乏与实际物理模型相一致的数学模型以及深入地分析,建立了较准确的数学模型。对信号采集电路的分析表明带不同极性电荷的磨粒经过静电感应区域时输出的感应电压变化不同,从而确定带电磨粒的极性。同时,引入空间灵敏度概念,对带电磨粒的位置、传感器的轴向长度与径向半径3个影响因素分别进行了研究,所得空间灵敏度曲线彼此印证,进而说明了所建数学模型的准确性。为了证实所建立的数学模型与实际的滑油系统全流量磨粒在线监测数据的一致性,设计了仿真监测试验平台,试验结果表明,虽然监测到的静电感应信号夹杂着噪声,但与理论分析的理想电压输出相似,并且可以判断磨粒所带电荷的极性。

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