Wear particle online monitoring device adopting rotational flow centrifugation, adsorption and adjacent capacitance

Abstract

The invention relates to a wear particle online monitoring device adopting rotational flow centrifugation, adsorption and adjacent capacitance. A temperature control module, a magnetizing module, a mechanical centrifugation module, a rotary magnetic field centrifugation module, an adsorption module, an adjacent capacitance particle monitoring module and a demagnetizing module of the monitoring device are sequentially connected. An oil liquid inlet is formed in one end of the temperature control module. The mechanical centrifugation module is a rotational flow centrifugation module. The adjacent capacitance sensor technology based on the capacitance edge effect is introduced, and wear particles are monitored without invasion or restriction. By means of the electrification module, the mechanical centrifugation module and the rotary magnetic field centrifugation module, the wear particles in oil liquid are magnetized and aggregated into large particles, move to the position close to the pipe wall and are adsorbed by the adsorption module, so that the intensity of monitoring signals output by an adjacent capacity sensor is improved. By means of the temperature control module and the adjacent capacitance sensor pole plate layer structure designed reasonably, noise is restrained, and the overall performance of the monitoring device of the adjacent capacitance sensor 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 device for wear particles using swirl centrifugation, adsorption 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.

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