Research on Temperature Sensing Fault of a Certain Type of Lubricating Oil Temperature Sensor
Aiming to the temperature sensing fault phenomenon(abnormal signal output)of a certain type of lubri-cating oil temperature sensor,the fault location and fault mode analysis of the lubricating oil temperature sensor are car-ried out through disassembly and X-ray methods.The fault point is identified as the temperature sensing component,and the fault mode is open circuit.By using the fault tree method to analyze the factors that may cause open circuit faults in temperature sensing components one by one,the following conclusion can be drawn:during the welding process,the high temperature is transmitted along the inner lead to the thin film component,which results in the reinforcement resin of the component to burn or expand severely due to heating.It also causes the loosening and detachment of the reinforce-ment resin and lead wires,poor contact between the lead wires and the metal film,and ultimately causing the tempera-ture sensing component to open circuit after high temperature or temperature cycling.Based on the analysis of failure mechanisms and experiments,the analysis and positioning of the open circuit problem in the temperature sensing compo-nent of this type of lubricating oil temperature sensor are accurate,and the improvement measures are effective.
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