摘要
为了改善密封-转子系统流体激振问题,提出了一种结构新颖的整体式挤压油膜阻尼器(ISFD)。基于ISFD建立了密封-转子系统的动力学模型,并搭建了该系统的实验台,探究了ISFD对转子动力学特性的影响规律;对比了一定工况条件下,刚性支承和ISFD支承密封-转子系统的振动幅值变化;分别开展了不同转速和不同偏心率条件下,密封-转子系统响应变化的实验研究。研究结果表明:在不同工况条件下,与刚性支承相比,ISFD支承密封-转子系统的振动幅值降低幅度达到40%~70%,并且ISFD使转子的轴心轨迹由复杂的形状变成趋近于椭圆形;ISFD对转子不平衡力和流体激振力引起的振动均有良好的抑制效果,可以有效地抑制转子-密封系统的流体激振。
In order to improve the fluid-excited vibration problem of the seal-rotor system,a novel integrated squeeze film damper(ISFD)was proposed.Based on ISFD,a dynamic model of the seal-rotor system was established and an experimental platform of the system was built to explore the influence of ISFD on the dynamic characteristics of the rotor.During the experiment,the vibration amplitude changes of the rigid support and ISFD support seal-rotor system were compared under certain working conditions.The experimental researchs on the response changes of the seal-rotor system under different speed and different eccentricity conditions were carried out.The experimental results show that under different working conditions,comparing with rigid supports,the vibration amplitude of ISFD support seal-rotor system is reduced by 40%~70%,and ISFD makes the axis trajectory of the rotor approach from a complex shape to oval.It can be seen that ISFD has a good suppression effect on the vibration caused by the rotor imbalance force and the fluid excitation force,and effectively suppresses the fluid excitation of the rotor-sealing system.
作者
闫伟
何立东
亢嘉妮
贾兴运
张翼鹏
YAN Wei;HE Li-dong;KANG Jia-ni;JIA Xing-yun;ZHANG Yi-peng(College of Mechanical and Electrical Engineering,Beijing Universityof Chemical Technology,Beijing 100029,China)
出处
《机电工程》
CAS
北大核心
2021年第1期42-48,共7页
Journal of Mechanical & Electrical Engineering
基金
国家科技重大专项资助项目(2017-Ⅳ-0010-0047)
中国博士后科学基金资助项目(2020M670113)
中央高校基本科研业务费专项资金资助项目(JD2003)。
关键词
流体激振力
振动控制
整体式挤压油膜阻尼器
动力学特性
fluid exciting force
vibration control
integral squeeze film damper(ISFD)
dynamic characteristics
