Abrasion particle monitoring method based on magnetic field centrifugation, electric shock hammer adsorption and adjacent capacitance

Abstract

The invention relates to an abrasion particle monitoring method based on magnetic field centrifugation, electric shock hammer adsorption and adjacent capacitance. According to the abrasion particle monitoring method, online monitoring of abrasion particles is conducted sequentially through a temperature control module, a magnetization module, a rotating magnetic field centrifugation module, an adsorption module, an adjacent capacitive particle monitoring module and a demagnetization module. An oil inlet is formed in one end of the temperature control module. The adsorption module is specifically a homopolar adjacent type adsorption ring provided with an electric shock hammer. According to the abrasion particle monitoring method, an adjacent capacitance sensor technique based on the capacitance fringe effect is introduced, so that non-invasion unconstrained monitoring of the abrasion particles is achieved; the abrasion particles in the oil are magnetized and aggregated into big particles through the magnetization module and the rotating magnetic field centrifugation module, move to the position near the pipe wall, and are adsorbed by the adsorption module, and thus the intensity of a monitoring signal output by an adjacent capacitance sensor is increased; and through the temperature control module and the reasonable design of the structure of an adjacent capacitance sensor polar plate layer, noise is restrained, 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 method for wear particles in hydraulic pipeline oil, in particular to a method for monitoring wear particles using magnetic field centrifugation, 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 ...

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.

Images