摘要
在气体箔片轴承内添加压电陶瓷块和金属丝网块改进主动气体箔片轴承(AGFB)的结构,通过压电陶瓷块实现轴承径向预载的主动控制,同时通过金属丝网块提高轴承结构阻尼。首先,为了分析主动气体箔片轴承弹性结构的力学性能,提出耦合压电陶瓷块-金属丝网块子结构、波箔和顶箔的弹性结构力学模型;其次,采用耦合弹性结构力学模型和可压缩气体雷诺方程预测了主动气体箔片轴承的静态和动态特性;最后,针对不同参数对轴承动态性能的影响进行参数化讨论。结果表明:金属丝网块的过盈量和相对密度以及电压的增大均会导致轴承的动态直接刚度和阻尼系数增大,较小的名义间隙会导致轴承的动态直接刚度和阻尼系数较大。
The structure of active gas foil bearing(AGFB)is improved by adding piezoelectric ceramic blocks and metal mesh blocks into the bearing,the active control of radial preload of the bearing is realized by piezoelectric ceramic blocks,and the structural damping of the bearing is improved by metal mesh blocks.Firstly,in order to analyze the mechanical properties of elastic structure of AGFB,a mechanical model of elastic structure coupling piezoelectric ceramic blocks-metal mesh blocks substructure,bump foil and top foil is proposed.Secondly,the static and dynamic characteristics of AGFB are predicted by coupling mechanics model of elastic structure with compressible gas Reynolds equation.Finally,the influence of different parameters on dynamic characteristics of the bearing is discussed parametrically.The results show that the increase of interference and relative density of metal mesh blocks and voltage will lead to increase of dynamic direct stiffness and damping coefficient of the bearing,and the small nominal clearance will lead to large dynamic direct stiffness and damping coefficient of the bearing.
作者
关汗青
冯凯
GUAN Hanqing;FENG Kai(School of Mechanical Engineering,Hunan Institute of Engineering,Xiangtan 411104,China;College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)
出处
《轴承》
北大核心
2022年第10期76-85,共10页
Bearing
基金
湖南省自然科学基金青年项目(2022JJ40115)
湖南省教育厅重点科研项目(21A0450)。
关键词
滑动轴承
箔片轴承
气体动压轴承
压电陶瓷
金属丝网
静态特性
动态特性
plain bearing
foil bearing
aerodynamic bearing
piezoelectric ceramics
metal mesh
static characteristics
dynamic characteristics
