Wear particle online monitoring device using filtering, centrifuge and adjacent capacitance

Abstract

The invention relates to a wear particle online monitoring device using filtering, centrifuge and adjacent capacitance. The wear particle online monitoring device using filtering, centrifuge and adjacent capacitance comprises a filter, a temperature control module, a magnetizing module, a mechanical centrifugal module, a rotary magnetic-field centrifugal module, an adsorption module, an adjacent capacitance particle monitoring module and a demagnetizing module, which are sequentially connected. The filter is a pressure pulse filter with the full-band hydraulic system. One end of the filter is provided with an oil inlet, and one end of the demagnetizing module is provided with an oil outlet. The wear particle online monitoring device can realize non-intruding and restraint-free monitoring by introducing the adjacent capacitance sensor technology based on capacitance edge effect. Through magnetization, mechanical centrifuge and the rotary magnetic-field centrifugal module, wear particles in oil can be magnetized and gathered to be large particles moving to the pipe wall and to be adsorbed by the adsorption module, so that intensity of output monitoring signals of the adjacent capacitance sensor is improved. Through the temperature control module and the adjacent capacitance sensor plate structure reasonably designed, noise can be suppressed, and the overall performance of the adjacent capacitance sensor-monitoring device can be optimized.

Description

【Technical field】 [0001] The invention relates to an on-line monitoring device for wear particles in hydraulic pipeline oil, in particular to a monitoring device for wear particles using hydraulic filtering, centrifugal and adjacent capacitance, 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 Authori...

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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