一种液压油磨粒检测新方法研究

Research on a novel method for detection of wear debris in hydraulic oil

液压油中的磨粒含有大量有关液压零部件磨损的重要信息,对磨粒的检测可有效预防液压系统的故障。针对电感式磨粒传感器对非铁磁性金属磨粒的检测能力较弱的缺点,本文提出了一种集成式磨粒检测装置,包括一个电容式传感器和一个电感式传感器。电容式传感器可对液压油中的气泡和金属颗粒实现区分检测,电感传感器可对液压油中的铁磁性和非铁磁性磨粒进行区分检测。通过结合比较电感和电容两个传感单元的检测结果,可实现对液压油中的气泡,铁磁性和非铁磁性金属颗粒的高精度检测。所设计的传感装置能够检测并区分80μm气泡,30μm铁颗粒和45μm铜颗粒。电容式传感器和电感式传感器的集成有效地弥补了两种检测方法各自的不足,这种多种传感器融合的方式对提高磨粒检测装置的检测精度具有重要的意义。

Wear debris in the hydraulic oil contains a lot of important information about the wear of hydraulic components.The detection of wear debris can prevent hydraulic system failures effectively.The inductive sensor has the shortcoming of weak ability to detect non-ferromagnetic metal particles.To solve this problem,this paper proposes an integrated wear debris detection device,which consists of a capacitive sensor and an inductive sensor.The capacitive sensor can distinguish the air bubbles and metal particles in hydraulic oil.The inductive sensor can distinguish the ferromagnetic and non-ferromagnetic metal particles in hydraulic oil.By combining the detection results of two sensors,air bubbles,ferromagnetic and non-ferromagnetic metal particles can be detected with a high sensitivity.The designed wear debris detection device in this study can detect and distinguish 80μm air bubbles,30μm iron particles and 45μm copper particles.The integration of the capacitive sensor and the inductive sensor compensates for the shortcomings of the two detection methods effectively.The combination of multiple types of sensors is of great significance for improving the detection accuracy of the wear debris detection device.