权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Research on Surface Failure Mechanism and Failure Prediction and Diagnosis of Surface Modified Gears

表面修形齿轮表面失效机理及失效预测诊断研究

基本信息

批准号：
10555052
负责人：
YOSHIDA Akira
金额：
$ 7.68万
依托单位：
OKAYAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555052/
关键词：
Gear Surface Modification Wear Friction Tooth Surface Failure Prediction Diagnosis Wavelet Transform 歯面損傷

项目摘要

This research is a further research to clarify the surface failure mechanism and the failure prediction and diagnosis of the surface modified gears. In this research, electroless Ni-P alloy plating, sulphurizing, Sn plating with thermal diffusion and ion-nitriding were employed as surface modification. Wear characteristics, rolling contact fatigue behavior and gear performance of these surface modified specimens were examined under oil lubrication and in vacuum. These experimental results were discussed using the analytical results by BEM, wavelet transform and so on.The rolling contact fatigue strength of the surface modified roller was higher than that of the roller without surface modification. The contact stress of the roller coated with modified layer having lower elastic modulus was lower than that of the roller without surface modification. It could be considered that the higher rolling contact strength by the surface modification was mainly due to the lower contact stress by th … More e surface modification. The friction coefficient of electroless Ni-P plated, Sn plated and surphurized gear sets was lower than that of non-coated gear set in vacuum. The change in the tooth profile of these gears was well corresponding to the change in the tooth root strain wave.By the roller test for the failure prediction and diagnosis of pitting and spalling, it could be said that the pitting failure and the spalling failure can be separately predicted by considering both the magnitude of the forced displacement between the contact rollers and the pattern of the wavelet map. Concerning the prediction and diagnosis of gear surface failure by the wavelet transform of the dynamic characteristics of the gear, it could be clarified that the failed tooth can be determined by the vibration data of the gear box and the failure position on tooth flank may be determined by the data of dynamic tooth root strain. The wavelet transform analysis was more usefull than the FFT analysis for the diagnosis of the gear failure. Less

本研究为进一步阐明表面修饰齿轮的表面失效机理及失效预测与诊断提供了理论依据。本研究采用化学镀Ni-P合金、硫化、热扩散镀锡和离子氮化等方法进行表面改性。研究了表面改性试样在油润滑和真空条件下的磨损特性、滚动接触疲劳行为和齿轮性能。利用边界元法、小波变换等分析结果对实验结果进行了讨论。表面改性后的轧辊轧制接触疲劳强度高于未表面改性的轧辊。弹性模量较低的涂覆改性层的辊体接触应力低于未涂覆改性层的辊体。可以认为，表面改性提高轧制接触强度的主要原因是表面改性降低了接触应力。真空条件下，化学镀Ni-P、镀Sn和表面镀锡的齿轮组摩擦系数均低于未镀镍的齿轮组。这些齿轮的齿形变化与齿根应变波的变化很好地对应。通过滚子试验对点蚀和剥落故障进行预测和诊断，可以认为，结合接触滚子间的强迫位移大小和小波图的模式，可以分别预测点蚀和剥落故障。利用齿轮动态特性的小波变换对齿轮表面故障进行预测和诊断，可以通过齿轮箱的振动数据确定故障齿，通过动态齿根应变数据确定齿侧故障位置。小波变换分析比FFT分析更有利于齿轮故障的诊断。少