文档介绍：摘要
齿轮箱是机械设备中广泛使用的重要部件,它的损伤和失效常常导致传动系统或整机的故障,从而导致重大安全事故。因此,作为动力传递核心的齿轮箱装置的故障诊断受到了越来越多的重视。而研究表明,齿轮箱故障的60%是由齿轮本体失效造成的,基于此,本文对齿轮故障的类型和形成原因,齿轮箱的振动机理、振动模型、齿轮箱故障信号所表现出的振动特征进行了研究,还对齿轮箱的故障诊断方法进行了归纳总结,并将所研究的诊断方法应用于齿轮箱故障诊断试验验证。通过对正常齿轮、断齿齿轮时域波形、频谱特征研究证明了不管齿轮是否有故障存在,其频谱中都会有啮合频率存在。同时通过对断齿故障齿轮的滤波、解调和功率谱分析验证了断齿齿轮的频谱特征为啮合频率及其谐频周围形成以轴的旋转频率为调制频率的边频带。
关键词:齿轮箱故障诊断振动机理实验验证
Abstract
The gear box is an important part in the mechanical device which has the widespread use. Its damage and fault always cause the transmission system or plete machine to breakdown ,and thus a significant incident will occur that is far from safety. Therefore, the failure diagnosis of the gearbox which is the core of the power transmissioas has been more and more valuesd . What’s more , studies indicated that 60% of the gear box’s failure is expired by the gear itself .Based on what was said above, this article is mainly about the types and the resons of the gearbox’s failure, the vibration characteristic and vibration model of the gearbox, the act of the sigal es out of the vibration when there is fault in a gearbox , and also the summary of the diagnosis method. At last, experiment has been conducted on the health gear , the chipped gear and the missed a tooth-gear. Then applied the theary that is studied above to the data processing . The result shows that no matter whether there is fault on the gear, the meshing frequency always exists. Meanwhile, by using filter、demodulation and power spectrum to the analysis of the missed tooth-gear, we can also see that the side-band frequencies exists around the meshing frequency and its multiple frequencies.
Key word: Gearbox Fault detection The mechanism of vibration Experiment
目录
第一章 绪论 1
1
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: 1
[6][7][8]: 5
: 7
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第二章 齿轮箱故障形式及原因分析 9
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2. 1