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为解决多跨转子系统通过临界转速时振动过大的问题,搭建双跨和三跨转子实验台,设计了新型转子动力吸振器,在轴上安装转子动力吸振器,模拟转子试车过程。通过基于转速的开关控制,在线控制转子动力吸振器中电磁铁的吸合状态,使其固有频率在2个频率之间切换,其中1个频率高于转子工作转速对应的频率,另1个频率与转子临界转速对应频率一致。对双跨转子和三跨转子轴系进行了带有开关控制的转子动力吸振器振动控制研究。结果表明,转子动力吸振器不仅能够在线抑制双跨转子和三跨转子轴系通过临界转速时的剧烈振动,还能避免使用传统动力吸振器给转子轴系带来2个新的共振峰的弊端,使转子系统在全转速范围内都能保持较低振动水平。
In order to solve the problem of excessive vibration when the multi-rotor system passes the critical speed, a double-span and three-span rotor test bench is set up. A new type of rotor dynamic vibration absorber is designed. The rotor dynamic vibration absorber is installed on the shaft to simulate the rotor test process. Through the speed-based switch control, the on-line control of the electromagnet pull-in state of the rotor dynamic vibration absorber causes its natural frequency to switch between two frequencies, one of which is higher than the corresponding speed of the rotor working speed and the other one of the frequencies Corresponding to the critical speed of the rotor corresponding frequency. The vibration control of the rotor dynamic vibration absorber with on-off control is studied for the double-rotor and the third-rotor. The results show that the rotor dynamic vibration absorber can not only suppress the in-line vibration of the double-rotor and the three-span rotor shaft at the critical speed, but also avoid the disadvantages of using the traditional dynamic vibration absorber to bring two new formant to the rotor shaft , So that the rotor system can maintain a low vibration level in the whole speed range.