Lubricating oil sample analysis
The lubricating oil circulates in the mining machinery and equipment, carrying a large amount of information on the operating state of the parts, which can be used to prompt the type, location and extent of the wear of the parts in the machine for fault diagnosis and working condition monitoring. At present, commonly used lubricating oil sample analysis methods include oil sample spectrometry, magnetic plug inspection and oil sample iron spectrum analysis. Among them, oil sample iron spectrum analysis method is the most widely used and most promising lubricant sample analysis method. The basic principle is that the oil sample is diluted on a glass test tube or a glass piece according to a certain operation step, and is passed through a strong magnetic field. Under the action of the magnetic force, the distances of the abrasive grains of different sizes can be different, according to the abrasive grains in the oil sample. The condition of the precipitation to determine the extent of wear of the part. The morphology of the residue was observed by optical or electron microscopy, and the composition of the abrasive grains was judged by an optical microscope. In this way, the iron spectrum analysis can provide four kinds of information on the quantity, particle size, shape and composition of the abrasive particles, and is more suitable for detecting wear particles with a particle size of 10~50μm.
The magnetic plug inspection method is a simple and effective method. It is inserted into the pipeline of the lubrication system with a magnetic plug, collects the abrasive grains in the oil, and directly observes the size, quantity and shape of the abrasive particles with the naked eye, and judges the parts. The state of wear. This method is suitable for the detection of oil samples with abrasive grains larger than 50 μm. This method is also an important means of detecting mining machinery and equipment, and has been used in some departments because of the large size of abrasive grains in the later stages of wear of machine parts.
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