Wear particle detecting method adopting electrification, electric control loop adsorption and adjacent capacitance

Abstract

The invention relates to a wear particle detecting method adopting electrification, electric control loop adsorption and adjacent capacitance. Wear particle online monitoring is carried out by virtue of a temperature control module, an electrification module, an electric field centrifugal module, an adsorption module, an adjacent capacitance particle monitoring module and a demagnetizing module; one end of the temperature control module is provided with an oil inlet; and the adsorption module is specifically a homopolar adjacent type adsorption ring. According to the wear particle detecting method, an adjacent capacitance sensor technology based on a capacitance edge effect is introduced, so that non-intrusive and non-restriction monitoring of the wear particles is realized; wear particles in an oil liquid are polymerized into large particles by electrification and electrical field centrifugation and are moved to positions near a tube wall for being adsorbed by the adsorption module, so that output monitoring signal strength of the adjacent capacitance sensor is improved; and by virtue of the temperature control module and a reasonably designed polar plate structure of the adjacent capacitance sensor, noises are restrained, and the overall performance of the adjacent capacitor sensor monitoring device is optimized.

Description

【Technical field】 [0001] The invention relates to an on-line monitoring method for wear particles in hydraulic pipeline oil, in particular to a detection method for wear particles using electrification, electric control ring 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...

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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.

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