Method for monitoring wear particles on line by virtue of filtration, electromagnetic centrifugation and adjacent capacitance

Abstract

The invention relates to a method for monitoring wear particles on line by virtue of filtration, electromagnetic centrifugation and adjacent capacitance. The wear particles are monitored on line sequentially through a filter, a temperature control module, a magnetization module, a cyclone centrifugation module, a rotating magnetic field centrifugation module, an adsorption module, an adjacent capacitance particle monitoring module and a demagnetization module, wherein an oil inlet is formed in one end of the filter; an oil outlet is formed in one end of the demagnetization module. According to the method, a capacitance edge effect-based adjacent capacitance sensor technology is introduced to implement nonintrusive and unconstrained monitoring of the wear particles; the wear particles in oil are magnetized and aggregated into large particles through the magnetization, cyclone centrifugation and rotating magnetic field centrifugation modules, move to the vicinity of tube walls and are adsorbed by the adsorption module, so that the output monitoring signal strength of an adjacent capacitance sensor is improved; by the temperature control module and a reasonably designed adjacent capacitance sensor plate layer structure, noise is suppressed, and the overall performance of an adjacent capacitance sensor monitoring device is optimized.

Description

【Technical Field】 [0001] The invention relates to an online monitoring method for wear particles in hydraulic pipeline oil, in particular to an online monitoring method for wear particles using filtering, electromagnetic centrifugation and adjacent capacitors, and belongs to the technical field of hydraulic systems. 【Background technique】 [0002] The wear particles in the oil of the hydraulic system can not only cause abrasive wear on the moving pair, but also block the relative movement of the moving pair and cause the control component to malfunction. Statistics at home and abroad show that 70% of hydraulic machinery failures are caused by oil particle pollution. Therefore, online monitoring of wear particles in oil has become one of the important ways to reduce wear and hydraulic system failures. [0003] Capacitive sensors are used in machine oil pollution monitoring because of their convenient production and low cost. Patent Document 1 (Chinese Invention Patent Authorizatio...

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Problems solved by technology

The distance between the excitation plate and the receiving plate of the capacitive sensor is limited by the diameter of the hydraulic pipe. Due to the relatively large diameter of the hydraulic pipe, the sensitivity of the sensor is not ideal.

[0005] At the same time, the violent fluctuation of the fluid in the online monitoring equipment of the wear particles in the prior art will lead to large fluctuations in the monitoring data and lead to monitoring failure

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