不同轴瓦结构滑动轴承-转子系统的稳定性  

Stability of bearing-rotor system with different bearing structures

作　　者：李梦暄[1] 吴价[1] 郑水英[2] 应光耀 刘淑莲[4] 

机构地区：[1]浙江大学现代制造工程研究所,浙江杭州310027 [2]浙江大学化工机械研究所,浙江杭州310027 [3]国网浙江省电力公司电力科学研究院,浙江杭州310014 [4]浙江科技学院机械与汽车工程学院,浙江杭州310023

出　　处：《浙江大学学报（工学版）》2017年第11期2239-2248,共10页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51275452)

摘　　要：针对可倾瓦滑动轴承稳定性机理研究方法不完善的问题,提出可倾瓦滑动轴承三维润滑流场计算方法.该方法基于计算流体动力学软件FLUENT、结合自行开发的动网格算法可对可倾瓦滑动轴承三维润滑流场进行瞬态计算,与转子动力学计算耦合可以得到可倾瓦滑动轴承-多圆盘转子系统在不同转速下的轴心轨迹.对可倾瓦滑动轴承-多圆盘转子系统进行不同转速下的振动试验,测试轴颈的振幅以及涡动中心的偏移情况.结果表明,相比常规固定瓦滑动轴承(圆柱、椭圆和三油楔轴承),可倾瓦滑动轴承得到的轴心轨迹幅值更小、涡动中心沿载荷作用方向下沉更低且偏位角几乎为零,试验结果与理论计算吻合一致.A three-dimensional（3 D）lubrication flow field calculation method of tilting-pad journal bearings（TPJBs）was presented in order to solve the problem that the stability mechanism research method of TPJBs is not perfect at present.The calculation method was based on CFD software FLUENT and a selfdeveloped dynamic mesh updating algorithm could be used for transient calculations of 3 Dlubrication flow field of TPJBs.When coupled with rotor dynamics calculations,shaft center whirl orbits of TPJB-multidisc rotor system under different rotational speeds could be calculated.Vibration tests of the TPJB-multidisc rotor system under different rotational speeds were conducted on a test rig in order to obtain vibration of the shaft and drift of the shaft center.Results show that TPJBs have smaller amplitude,lower whirling center along load direction and almost negligible attitude angle compared to conventional fixed sliding surface journal bearings（cylinder,ellipse,and three oil wedge bearings）.The experimental results accorded with the theoretical results.

关 键 词：计算流体动力学 FLUENT 可倾瓦滑动轴承 流固耦合 轴心轨迹 

分 类 号：TH113[机械工程—机械设计及理论]