滑油磨粒复合传感器结构优化设计

发布时间：2018-05-27 02:31

本文选题：复合传感器 + 电感传感器　；参考：《中国民航大学》2015年硕士论文

【摘要】：油液监测是监测航空发动机健康状况的重要方法之一。多数航空发动机故障是由零部件异常磨损造成的,异常磨损产生的磨粒较大,由此为实现故障诊断及预警可以对滑油中的大磨粒进行监测,通过传感器输出信号来判定磨损类型与位置,进而得出发动机健康状况。现有的传感器测量范围窄,本文基于对电感和电容传感器的研究,提出了监测范畴更广的新型复合传感器。首先利用ANSYS有限元分析软件分别对三线圈电感传感器和三环极板差动电容传感器进行建模分析。然后通过对不同磨粒的大小、位置、材质等属性和传感器自身的结构参数,比如宽度、厚度、间距等,进行仿真验证,得出传感器输出特性,并优化了传感器结构。最后提出复合式传感器,对三种复合方案仿真实验,对比分析各方案的优缺点,得出最优方案。仿真结果证明复合式传感器的感应电压可以达到mV级,监测电容达pF级。复合式传感器可以监测导电类和非导电类、铁磁性与非铁磁性磨粒,不仅扩大了监测范围,为故障诊断与评估提供可靠依据,还为信息融合提供可能,以上实验结果证明了复合传感器的可行性和科研价值。
[Abstract]:Oil monitoring is one of the important methods to monitor the health status of aeroengine. Most aero-engine faults are caused by abnormal wear of parts and components, and the abrasive particles produced by abnormal wear are larger. Therefore, in order to realize fault diagnosis and early warning, the large abrasive particles in the oil can be monitored. The wear type and position are determined by the sensor output signal, and then the engine health condition is obtained. The existing sensors have a narrow range of measurements. Based on the research of inductance and capacitance sensors, a new type of composite sensors with wider monitoring scope is proposed in this paper. Firstly, the three-coil inductance sensor and the three-ring pole plate differential capacitance sensor are modeled and analyzed by ANSYS finite element analysis software. Then the output characteristics of the sensor are obtained and the sensor structure is optimized by simulating the properties of different abrasive particles such as size position and material quality and the structural parameters of the sensor such as width thickness spacing and so on. Finally, a composite sensor is proposed, and the optimal scheme is obtained by comparing and analyzing the advantages and disadvantages of each scheme. The simulation results show that the inductive voltage of the composite sensor can reach MV level and the monitoring capacitance reaches PF level. Composite sensors can monitor conductive and non-conductive abrasive particles, ferromagnetic and non-ferromagnetic abrasive particles, which not only expand the monitoring scope and provide reliable basis for fault diagnosis and evaluation, but also provide the possibility for information fusion. The experimental results above prove the feasibility and scientific research value of the composite sensor.
【学位授予单位】：中国民航大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：V263.6;TP212

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