工程机械柴油机故障诊断技术（Fault diagnosis technology for diesel engine of construction machinery）.docVIP

工程机械柴油机故障诊断技术（Fault diagnosis technology for diesel engine of construction machinery） The fault diagnosis technology of construction machinery diesel engine The structure of 2011-06-21 16:49 diesel engine parts and auxiliary devices is more complex, more complicated, maintenance and repair work. This paper introduces the fault diagnosis technology of several engineering machinery diesel engine, for your reference. The structure of the diesel engine parts and auxiliary devices is more complex, more complicated, maintenance and repair work. This paper introduces the fault diagnosis technology of several engineering machinery diesel engine, for your reference. 1. the traditional diagnosis technology In the long-term practice, diesel engine parts and types of cognitive appear fault fault is various, and the method for eliminating the specific reasons are also different. From the technical route and means of implementation, the diesel engine fault diagnosis is usually applied to the traditional thermal parameter monitoring, grinding technology monitoring and vibration monitoring of grain. (1) thermal parameter monitoring? Thermal parameter monitoring is measured by diesel engine thermodynamic parameters, to determine the status of their work. Engine speed fluctuation caused by the fluctuation of crankshaft torque, the torque fluctuation and the cylinders of diesel engine ignition, the detection and study of speed fluctuation can be estimated in cylinder working pressure, and accordingly the relevant fault monitoring. (2) particle monitoring? Wear particle monitoring is the detection and analysis of diesel engine lubricating oil samples, take the comprehensive utilization of the oil test, ferrography analysis, spectral analysis and iron content examination means, diagnosis of diesel engine friction is abnormal wear, friction and fault judgement of diesel engine parts. (3) the sound and vibration monitoring? Sound and vibration monitoring through the monitoring of the dies