System for monitoring wear particles on line by virtue of hydraulic filtration, centrifugation and adjacent capacitance

Abstract

The invention relates to a system for monitoring wear particles on line by virtue of hydraulic filtration, centrifugation and adjacent capacitance. A filter, a temperature control module, a magnetization module, a mechanical centrifugation module, a rotating magnetic field centrifugation module, an adsorption module, an adjacent capacitance particle monitoring module and a demagnetization module of the system are sequentially connected, wherein an oil inlet is formed in one end of the filter; an oil outlet is formed in one end of the demagnetization module, and the demagnetization module consists of a residual magnetism sensor and a demagnetizer. According to the system, 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, mechanical 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 on-line monitoring device for wear particles in hydraulic pipeline oil, in particular to an on-line monitoring system for wear particles using hydraulic filtering, centrifugal and adjacent capacitors, and belongs to the technical field of hydraulic systems. 【Background technique】 [0002] The wear particles in the hydraulic system oil can not only cause abrasive wear of the kinematic pair, but also hinder the relative movement of the kinematic pair, resulting in malfunction of the control components. Statistics at home and abroad show that 70% of hydraulic machinery failures come from particle pollution of oil. Therefore, on-line 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 the pollution monitoring of machine oil because of their convenient fabrication and low cost. Patent Document 1 (Chinese Invention Patent...

AI Technical Summary

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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