Design of debris sensor based on toroidal uniform magnetic field
Aiming at the problems that the traditional inductive wear particle sensor has small flow,the magnetic induction intensity of the monitoring area is low,and the gradient is large,a debris sensor based on toroidal uniform magnetic field is designed.Through the design of the toroidal oil flow channel,an uniform radial magnetic field is generated in the monitoring area.At the same time,the relationship between the cross-sectional area of the magnetic circuit and the magnetic induction intensity of the sensor is analyzed,and the influence of different magnetic pole cross-sectional shapes on the magnetic induction intensity is compared,the structural optimization of the sensor is completed.It is concluded that the usage of wedge-shaped magnetic poles can effectively improve the utilization rate of the magnetic field.Ansys software is used to build a three-dimensional finite element model of the sensor,and the static magnetic field and transient characteristics of the sensor are revealed.Using a single debris without oil experiment,comparing and analyzing the experimental results and the output characteristics of the simulation structure,the effectiveness of the sensor is verified.Experimental results show that the sensor can detect 0.28mm ferromagnetic debris using a low magnification amplifier.The sensor has higher sensitivity than the existing sensors.
wear particle monitoringtoroidal magnetic fieldmagnetoresistanceinduced voltage
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维普
