电磁磨粒检测中气泡对铜颗粒信号的影响特性分析

Characterization of the Influence of Bubbles on Copper Particle Signal in Electromagnetic Abrasive Detection

三线圈式电磁磨粒传感器在油液在线监测中应用广泛,而油液中的气泡对铜颗粒的检测极易造成干扰,定量分析气泡在颗粒检测时的影响规律将有助于提高电磁磨粒传感器的检测精度。基于电磁磨粒检测中的磁耦合效应,分别研究了气泡间隙、气泡大小、气泡位置以及气泡数量对铜颗粒检测的影响特性,并以大管径通道(?38 mm)电磁磨粒传感器为对象进行仿真和试验。结果表明,气泡与铜颗粒间隙越大,铜颗粒信号幅值越小,影响范围(0.52~10.31)%;气泡尺寸增大铜颗粒信号幅值也增大,气泡直径为20 mm和25 mm时影响分别是3.07%和5.47%;气泡与铜颗粒中心连线与传感器中心轴线的夹角越大,检测影响越小,影响范围(0.4~5.6)%;气泡数量越多干扰越大,单气泡和双气泡的影响程度分别是5.66%和8.74%。

Three-coil electromagnetic abrasive sensor is widely used in oil online monitoring,and the bubbles in the oil are easy to interfere with the detection of copper particles,and the quantitative analysis of the influence of bubbles in particle detection will help to improve the detection accuracy of electromagnetic abrasive sensors.Based on the magnetic coupling effect in the detection of electromagnetic abrasive particles,the influence characteristics of bubble gap,bubble size,bubble position and number of bubbles on the detection of copper particles were studied,and the electromagnetic abrasive sensor with large diameter channel(∅38 mm)was simulated and tested.The results show that the larger the gap between the bubble and the copper particles,the smaller the signal amplitude of the copper particles,and the influence range is(0.52~10.31)%.The signal amplitude of copper particles also increased when the bubble size increased,and the influence of bubble diameter was 3.07%and 5.47%when the bubble diameter was 20 mm and 25 mm,respectively.The larger the angle between the center line of the bubble and the copper particle and the center axis of the sensor,the smaller the detection impact,and the influence range is(0.4~5.6)%;The greater the number of bubbles,the greater the disturbance,and the influence degree of single and double bubbles was 5.66%and 8.74%,respectively.