Induction type oil abrasive particle detection device

Abstract

The invention provides an induction type oil abrasive particle detection device which comprises an induction type detection assembly, the induction type detection assembly comprises a detection pipeline and a contrast pipeline which are parallel to each other, an induction coil and a contrast coil are respectively wound on the detection pipeline and the contrast pipeline, a coil excitation assembly is arranged on one side of the induction type detection assembly, the coil excitation assembly comprises a magnet exciting coil, an iron core and two magnetic pole plates, the magnet exciting coil is wound on the iron core, the two magnetic pole plates are located at the two ends of the iron core respectively, and an air gap is formed between the magnet exciting coil and the induction type detection assembly; the device further comprises a differential noise reduction circuit which is used for carrying out differential processing on an abrasive particle signal acquired by the induction coil and a noise signal acquired by the contrast coil. Based on the induction type abrasive particle detection method, differential processing is carried out on abrasive particle signals of the induction coil and the contrast coil through the differential noise reduction circuit, the signal-to-noise ratio of the abrasive particle signals can be increased, the noise reduction effect is achieved, and then the accuracy of the detection result is improved.

Description

technical field [0001] The invention relates to the technical field of equipment oil system fault detection, in particular to an induction type oil abrasive particle detection device. Background technique [0002] The main cause of mechanical equipment failure is the failure of parts, and the wear and tear of parts is the most common and main form of parts. For most of the mechanical equipment, the lubrication system has become an essential component. In a lubrication system, in addition to the functions of lubrication and cooling, the flowing lubricant also carries a large amount of effective information on the wear intensity and wear mode of mechanical equipment. When the equipment wears abnormally, the concentration of abrasive particles in the oil will increase significantly, and the particle size will suddenly increase to more than 100 microns. If the lubricating oil is not replaced in time, the particle size and concentration will gradually increase. Malfunctions can...

AI Technical Summary

Problems solved by technology

When the equipment wears abnormally, the concentration of abrasive particles in the oil will increase significantly, and the particle size will suddenly increase to more than 100 microns. If the lubricating oil is not replaced in time, the particle size and concentration will gradually increase. will malfunction and cause the device to stop working

[0003] The detection sensitivity of the existing inductive oil abrasive particle detection device is not high, and the effective detection area is small. For example, the publication number is CN109738338A, which is a Chinese invention patent named as a large-diameter lubricating oil line metal particle detection device and its detection method. The device in this patent uses an excitation unit on one side of the detection pipeline to generate a high-gradient magnetic field at the air gap between the two magnetic pole plates and then cooperate with the detection coil to measure the oil abrasive particles in the detection pipeline. This one-sided excitation inductive oil wear detection device provides low excitation strength, low detection sensitivity, small effective detection range, and cannot realize large flow detection, and the obtained signal has a low signal-to-noise ratio, and the detection results are not accurate enough

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