平行齿轮箱及行星齿轮箱是机械设备的重要传动部件,也是故障频发部件。基于实验分析,对比研究平行齿轮箱和行星齿轮箱局部故障的特征提取方法。应用Compact—RIO采集齿轮箱的实时振动信号.运用共振解调技术.成功提取平行齿轮箱齿轮断齿故障的特征频率。对于行星齿轮断齿故障,其振动传递路径复杂.信号非平稳、非线性程度严重,共振解调技术提取不到其故障特征频率。对此,应用EEMD技术对故障信号进行分解,避免了传统的EMD技术带来的模式混叠.成功提取故障的特征频率。
The parallel gearbox and planetary gearbox are important transmission components of me- chanical equipment, such as wind turbine, and it breaks down frequently. Based on the experimental research method, the feature extraction method of parallel gear and planetary gear is studied eon- trastively. Firstly real-time vibration signal on gearbox is acquired with Compact-RIO. Then the char- acteristic frequency of tooth-broken gear in parallel gearbox is extracted with resonance demodulation. For the signal of teeth-broken gear in planetary gearbox, the transfer path of vibration is complex, the signal is seriously non-stationary and non-linear, resonance demodulation fails to extract the character- istic frequency. Finally EEMD technology for signal decomposition is used to avoid the aliasing caused by traditional EMD mode, successfully extract the fault characteristic frequency.