On-line wear particle monitoring equipment adopting electrification, electric shock hammer adsorption and adjacent capacitance

Abstract

The invention relates to on-line wear particle monitoring equipment adopting electrification, electric shock hammer adsorption and adjacent capacitance. A temperature control module, an electrification module, an electric field centrifugation module, a mechanical centrifugation module, an adsorption module, an adjacent capacitance particle monitor module and a demagnetization module of the equipment are sequentially connected; one end of the temperature control module is provided with an oil liquid inlet; the adsorption module particularly is homopolar adjacent type adsorption rings with electric shock hammers. According to the equipment, non-intrusive and unconstrained wear particle monitoring is achieved by introducing an adjacent capacitance sensor technique based on a capacitance edge effect; through the electrification module, the electric field centrifugation module and the mechanical centrifugation module, wear particles in oil liquid are aggregated into large particles and move to the positions near the tube wall to be adsorbed by the adsorption module, so that the output monitoring signal intensity of an adjacent capacitance sensor is improved; by arranging the temperature control module and reasonably designing the structure of a polar plate layer of the adjacent capacitance sensor, noise is inhibited, and the whole performance of an adjacent capacitance sensor monitoring device is optimized.

Description

【Technical field】 [0001] The invention relates to an online monitoring device for wear particles in hydraulic pipeline oil, in particular to an online monitoring device for wear particles using electrification, electric hammer 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 Inventi...

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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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