高速双透平与四磁盘同轴结构轴系振动特性试验研究
发布时间：2018-10-15 15:24
【摘要】：在动静压混合气体润滑轴承支承的双透平与四磁盘同轴结构的涡轮膨胀发电机试验台上,研究气体轴承-转子系统动力学特性。通过轴心轨迹、频率耦合三维图和频谱图,分析系统非线性行为特征,结合转子系统的结构对飞升现象进行分析。结果表明:该轴承-转子系统由于采用气浮轴承,在一定供气压力下,出现半速涡动、气膜振荡的典型振荡现象,并在某一转速时出现飞升现象。出现飞升的原因是由于设备结构中采用了阻尼低的气体轴承以及两端涡轮结构,使其在工频、分频能量转化时转换成了转子转速,导致转子转速的急剧增加。通过调节振动特性和控制涡轮供气流量等措施可抑制飞升。
[Abstract]:The dynamic characteristics of gas bearing-rotor system were studied on a turbo-expansion generator test-bed with a coaxial structure of two turbines and four disks supported by a hybrid gas lubricated bearing with static and static pressure. The nonlinear behavior of the system is analyzed by means of the axis locus, the frequency coupling 3D diagram and the spectrum chart. The rise phenomenon is analyzed with the structure of the rotor system. The results show that the bearing-rotor system has a typical oscillation phenomenon of half-speed vortex and film oscillation under a certain supply pressure due to the use of air bearing and the phenomenon of flying at a certain speed. The reason for the rise is that the gas bearing with low damping and the turbine structure at both ends are used in the structure of the equipment, which converts the rotor speed into the rotor speed when the power frequency and frequency division energy are converted, which results in the rapid increase of the rotor speed. By adjusting the vibration characteristics and controlling the flow rate of the turbine, the rise can be restrained.
【作者单位】： 华北电力大学能源动力与机械工程学院;中国科学院工程热物理研究所;
【基金】：国家科技支撑计划项目(2012BAA11B02)
【分类号】：TH133.3
本文编号：2272966
[Abstract]:The dynamic characteristics of gas bearing-rotor system were studied on a turbo-expansion generator test-bed with a coaxial structure of two turbines and four disks supported by a hybrid gas lubricated bearing with static and static pressure. The nonlinear behavior of the system is analyzed by means of the axis locus, the frequency coupling 3D diagram and the spectrum chart. The rise phenomenon is analyzed with the structure of the rotor system. The results show that the bearing-rotor system has a typical oscillation phenomenon of half-speed vortex and film oscillation under a certain supply pressure due to the use of air bearing and the phenomenon of flying at a certain speed. The reason for the rise is that the gas bearing with low damping and the turbine structure at both ends are used in the structure of the equipment, which converts the rotor speed into the rotor speed when the power frequency and frequency division energy are converted, which results in the rapid increase of the rotor speed. By adjusting the vibration characteristics and controlling the flow rate of the turbine, the rise can be restrained.
【作者单位】： 华北电力大学能源动力与机械工程学院;中国科学院工程热物理研究所;
【基金】：国家科技支撑计划项目(2012BAA11B02)
【分类号】：TH133.3
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