Detection device and detection method for ferromagnetic abrasive grains in liquid oil

Abstract

The invention puts forward a detection device and detection method for ferromagnetic abrasive grains in liquid oil. The device comprises a detection unit and a processor unit. The detection unit includes: a quartz crystal sensor that is disposed in the shell to divide the shell into a detection cavity and an oil holding cavity; a magnet disposed in the detection cavity; a main control board that is disposed in the detection cavity and is connected to the processor unit. The main control board is used for detecting the vibration signal of the quartz crystal sensor's quartz wafer, and the processor unit acquires the content of ferromagnetic abrasive grains in the to-be-detected oil according to the corresponding relationship of the vibration signal and the content of ferromagnetic abrasive grains in the to-be-detected oil. According to the detection device involved in the embodiment of the invention, the magnet attracts ferromagnetic abrasive grains in the to-be-detected oil to the upper surface of the quartz crystal sensor's first electrode, and performs mutual attraction with the ferromagnetic abrasive grains through magnetic force to change quartz wafer, and by means of the correlation curve of the quartz wafer's vibration variation quantity and the ferromagnetic grain content, the content of ferromagnetic abrasive grains in the to-be-detected oil can be obtained finally.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a detection device and a detection method for ferromagnetic abrasive grains in liquid oil. Background technique [0002] The vast majority of mechanical parts are made of ferrous materials. In actual mechanical operation, due to the occurrence of friction and wear, the material on the moving surface usually falls off in the form of wear particles and melts into the lubricating oil. The mechanical wear process is generally divided into three stages, namely, running-in wear, stable wear and severe wear. The normal operation of machinery usually occurs stable wear, and its wear amount is small. When the wear rate of the material increases suddenly, especially when the large-size ferromagnetic abrasive particles appear in the lubricating oil, it often indicates the occurrence of severe wear. If it is not repaired in time, it will cause failure. Detecting the content of ferromagnetic abrasi...

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Problems solved by technology

Although the offline detection method can obtain high detection accuracy, the process is cumbersome and the analysis cycle is too long

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