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Full-Text Articles in Mechanical Engineering
On-Line Wear Debris Detection In Lubricating Oil For Condition Based Health Monitoring Of Rotary Machinery, Li Du, Jiang Zhe
On-Line Wear Debris Detection In Lubricating Oil For Condition Based Health Monitoring Of Rotary Machinery, Li Du, Jiang Zhe
Dr. Jiang Zhe
Condition based monitoring has become essential in maintaining and extending the health of high-speed rotating and reciprocating machinery. One effective approach to detect signs of potential failure of a rotating or reciprocating machine is to examine the wear debris in its lubricating oil. Recent patents and research articles on on-line wear debris detection in lubricating oil are reviewed in this paper, including electrical impedance detection, acoustic detection, optical detection, pressure detection, online x-ray spectrography, resonant frequency detection, and electrostatic charge detection. Advantages and limitations of each detection method are discussed.
A High Throughput Inductive Pulse Sensor For Online Oil Debris Monitoring, Li Du, Jiang Zhe
A High Throughput Inductive Pulse Sensor For Online Oil Debris Monitoring, Li Du, Jiang Zhe
Dr. Jiang Zhe
A high throughput inductive pulse sensor based on inductive Coulter counting principle for detecting metallic wear debris in lubrication oil is presented. The device detects the passage of metallic debris by monitoring the inductance change of a two-layer planar coil with a meso-scale fluidic pipe crossing its center, which is designed to attain high throughput without sacrificing the sensitivity. The testing results using iron and copper particles ranging in size from 50 to 150 μm have demonstrated that the device is capable of detecting and distinguishing ferrous and non-ferrous metallic debris in lubrication oil with a high throughput.