Differential diagnosis of spall vs. cracks in the gear tooth fillet region: Experimental validation
Differential diagnosis of spall vs. cracks in the gear tooth fillet region: Experimental validation
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DOI：
10.1016/j.ymssp.2008.08.015
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发表时间：
2009-04
影响因子：
8.4
通讯作者：
H. Endo;R. Randall;C. Gosselin
中科院分区：
文献类型：
--
作者：
H. Endo;R. Randall;C. Gosselin
本文提出了一种区分诊断两种类型的局部齿轮齿故障的技术：剥落和裂纹的齿轮齿圆角区域。这些故障可能有非常不同的故障，但现有的诊断技术只能检测到局部牙齿故障的存在，而不能区分剥落和裂纹。利用静态和动态仿真模型研究了剥落和裂纹对齿轮组件性能的影响。利用静态分析模型，比较了一对啮合齿轮由于齿根圆角裂纹（TFC）和齿侧剥落引起的运动学变化。这两种故障引起的传输误差（TE）变化的差异揭示了它们的特征。齿裂纹的影响取决于齿刚度的变化，而层裂的影响主要由断层的几何形状决定。以前曾提出一种探测层裂的方法[M. EL Badaoui，J. Antoni，F.张文龙，基于移动倒谱积分的齿轮剥落检测与定位，机械系统与信号处理，15（5）（2001）873-885; M. EL Badaoui，V. Cahouet，F. Guillet，J. DanieleP. Velex，齿轮系统中局部齿缺陷的建模和检测，ASME学报，123（2001）422-430]，使用倒频谱检测信号中的负回波（从进入和离开剥落），并成功地对模拟振动信号进行了鉴别诊断。虽然实验研究的结果显示出一些差异，从模拟研究的结果，鉴别诊断成功地进行了基于本文提出的技术。进一步的调查显示，非线性齿轮啮合行为，这是造成差异的实验和模拟模型的结果。
This paper presents a technique to differentially diagnose two types of localized gear tooth faults: a spall and a crack in the gear tooth fillet region. These faults could have very different prognoses, but existing diagnostic techniques only detect the presence of localized tooth faults without being able to differentiate between a spall and a crack. The effects of spalls and cracks on the behaviour of gear assemblies were studied using static and dynamic simulation models. Changes in the kinematics of a pair of meshing gears due to a gear tooth fillet crack (TFC) and a tooth flank spall were compared using a static analysis model. The difference in the variation of the transmission error (TE) caused by the two faults reveals their characteristics. The effect of a tooth crack depends on the change in stiffness of the tooth while the effect of a spall is dominantly determined by the geometry of the fault. A technique has previously been proposed to detect spalls [M. EL Badaoui, J. Antoni, F. Guillet, J. Daniere, Use of the moving cepstrum integral to detect and localize tooth spalls in gears, Mechanical System and Signal Processing, 15 (5) (2001) 873–885; M. EL Badaoui, V. Cahouet, F. Guillet, J. Daniere P. Velex, Modelling and detection of localized tooth defects in geared systems, Transaction of ASME, 123 (2001) 422–430], using the cepstrum to detect a negative echo in the signal (from entry into and exit from the spall) and successfully performed differential diagnosis on the simulated vibration signals. While the result of the experimental study showed some differences from the result of the simulation study, the differential diagnosis was successfully performed based on the technique presented in this paper. Further investigation revealed non-linear gearmesh behaviour which was causing differences in the experimental and simulation model results.