混合动力挖掘机动力系统轴系模态分析  

Shaft Modal Analysis of Power System of Hybrid Power Excavators

作　　者：黄中华 谢雅[1] 邓奕[1] 高宏伟[1] 

机构地区：[1]湖南工程学院机械工程学院 [2]中南大学机电工程学院

出　　处：《工程机械》2012年第11期25-28,2,共4页Construction Machinery and Equipment

基　　金：教育部重点项目(212123);湖南省教育厅重点项目(11A026)

摘　　要：通过有限元计算分别获取柴油机轴系和电动机轴系的前10阶模态频率及振型。在此基础上,通过有限元计算获取混合动力系统轴系的前10阶模态频率及振型。计算结果表明:与普通动力系统相比,由于电动机的接入,混合动力系统轴系各阶模态频率有所下降,但高于电动机轴系各阶模态频率。下降的主要原因是电动机轴系的各阶模态频率明显低于柴油机轴系。对混合动力系统轴系的振动信号进行试验测试和分析。测试结果表明:振动信号的能量集中在X方向和Y方向,表明振动信号主要由弯曲振动产生。振动信号的频谱中出现了动力系统轴系的5阶和6阶模态频率,表明振动信号主要来源于电动机转子的弯曲振动。We through finite element computation had got top 10 grades of modular frequency and vibration mode, respectively, for the diesel engine shaft series and the motor shaft series. Thereon, we through finite element computation had got top 10 grades of modular frequency and vibration mode, respectively, for the mixed power shaft series. Computation results show that as compared with common power systems there is a decrease of individual modular frequencies in the mixed power shaft series as a result of the electric motor insertion, but higher than that of the electric motor shaft series. Such a decrease is mainly because of grades of modular frequency in the electric motor shaft series are obviously higher than that of the diesel engine shaft series, which was followed by a trial test and analysis of the vibration signals at the mixed power shaft series. Test results show that signal energy concentrates in the X direction and Y direction and tell that the vibration signal is mainly created by the bending vibration. Frequency spectrum of the vibration signal witnessed 5th-grade and 6th grade modular frequency in shaft series of the power system and tells that the vibration signal comes mainly from rotor of the electric motor.

关 键 词：混合动力挖掘机 动力系统 模态分析 轴系 

分 类 号：TH133.3[机械工程—机械制造及自动化] TU621[建筑科学—建筑技术科学]