Magnetic flux leakage detection of bearing roller microcracks
-
摘要: 针对目前使用广泛的GCr15高碳铬轴承滚子，提出了微细裂纹漏磁检测方法。运用COMSOL有限元软件仿真分析滚子微细裂纹的漏磁场特性，研究了磁化参数、裂纹尺寸对信号的影响，选用隧道磁电阻传感器（TMR）拾取信号。由于TMR在强背景磁场下容易超量程饱和，提出了一种测点区域近零磁场调控的TMR测磁方法。设计了线圈电磁磁化的偏置检测探头，建立测点区域自适应近零磁场环境，通过试验对比分析了探头偏置前后检测信号的幅值、信噪比等特征参数，结果表明探头性能得到了优化。Abstract: Aiming at the widely used GCr15 high-carbon chromium bearing rollers, a micro-crack magnetic flux leakage detection method was proposed. COMSOL finite element software was used to simulate and analyze the leakage magnetic field characteristics of roller micro-cracks, and the influence of magnetization parameters and crack size on the signal was studied. Tunneling magnetoresistance sensor (TMR) was used to pick up the signal. Since TMR is prone to over-range saturation under strong background magnetic field, a TMR magnetometry method with near-zero magnetic field regulation in the measuring point region was proposed. The offset detection probe with electromagnetic magnetization of the coil was designed, and the self-adaptive near-zero magnetic field environment of the measuring point area was established. The amplitude and signal-to-noise ratio of the detection signal before and after the probe offset were compared and analyzed through experiments, which showed that the performance of the probe was optimized.
-
Keywords:
- microcrack /
- flux leakage detection /
- near-zero magnetic field /
- adaptive regulation /
- TMR
-
-
[1] 李洁,杨兴旺.浅析我国轴承制造技术的现状及其发展趋势[J].广东蚕业,2018,52(4):45. [2] 刘桥方,严枫.我国轴承制造技术的现状及其发展趋势[J].轴承,2005(6):42-45,11. [3] ODANOVIC Z,RISTIVOJEVIC M,MILOSEVIC-MITIC V.Investigation into the causes of fracture in railway freight car axle[J].Engineering Failure Analysis,2015,55:169-181.
[4] 吴小亮.平直钢管磁性无损检测关键技术研究[D].武汉:华中科技大学,2006. [5] ZBROWSKI A,MATECKI K.The use of computed tomography to analyse ginding smudges and subsurface defects in roller bearing rings[J].Strojniški Vestnik-Journal of Mechanical Engineering,2014,60(11):709-715.
[6] 吴景.基于机器视觉的轴承滚子表面缺陷检测系统[D].杭州:浙江大学,2018. [7] 李旭.轴承滚子表面缺陷涡流检测系统研究[D].长春:长春理工大学,2020. [8] SI-CHAIB M O,DJELOUAH H,NOUR A.Study of shear ultrasonic waves propagating in materials under static uniaxial loadings:simulation,shear waves,acoustoelasticity,mechanical stresses,materials[J].Strain,2011,47:134-143.
[9] 张杰,王宇,陈亮.铁路车辆轴承圆柱滚子非相关磁痕形貌分析[J].哈尔滨轴承,2019,40(3):24-25,37. [10] YI C,LIN J,ZHANG W,et al.Faults diagnostics of railway axle bearings based on IMF's confidence index algorithm for ensemble EMD[J].Sensors,2015,15(5):10991-11011.
[11] 苏俊宏,刘胜利.圆柱型高精密零件表面缺陷检测及形貌分析[J].激光与光电子学进展,2014,51(4):154-158. [12] 冯搏,伍剑波,邱公喆,等.高速漏磁检测方法的发展[J].无损检测,2021,43(2):57-63.
计量
- 文章访问数: 9
- HTML全文浏览量: 0
- PDF下载量: 6
下载:
