同心与非同心挤压油膜阻尼器减振特性对比试验研究  

Comparative Experimental Investigation on Vibration Attenuating Characteristics of Concentric and Non-concentric Squeeze Film Damper

作　　者：冯义 邓旺群 刘文魁 袁胜 胡廷勋 FENG Yi;DENG Wangqun;LIU Wenkui;YUAN Sheng;HU Tingxun(AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,Hu'nan,China;Key Laboratory of Aero-engine Vibration Technology,Aero Engine Corporation of China,Zhuzhou 412002,Hu'nan,China)

机构地区：[1]中国航发湖南动力机械研究所,湖南株洲412002 [2]中国航空发动机集团航空发动机振动技术重点实验室,湖南株洲412002

出　　处：《机械科学与技术》2023年第6期978-984,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：航空科学基金项目(2013ZB08001)。

摘　　要：针对某小型涡扇发动机低压转子的减振设计问题,开展同心与非同心挤压油膜阻尼器(SFD)的减振特性对比试验研究。设计了与发动机低压转子主体结构和动力特性一致的低压模拟转子,在高速旋转试验器上,分别对带同心SFD与非同心SFD的低压模拟转子进行全转速范围内的动力特性试验,研究了油膜供油压力与不平衡量大小对SFD减振特性的影响。结果表明:非同心SFD会使转子系统临界转速降低;油膜供油压力对非同心SFD减振特性的影响比同心SFD更显著;同心SFD可承受比非同心SFD更大的转子不平衡量,但在较小的不平衡量范围内,非同心SFD的减振效果更好。In order to solve the vibration reduction design problem of low-pressure rotor of a small turbofan engine,a comparative experimental investigation on the vibration attenuating characteristics of concentric and non-concentric squeeze film dampers(SFD)was carried out.A low-pressure simulated rotor which is consistent with the main structure and dynamic characteristics of low-pressure rotor was designed.On a high-speed rotating tester,the dynamic characteristics of low-pressure simulated rotor with concentric SFD and non-concentric SFD were tested in the full speed range,and the effects of oil film supply pressure and unbalance on the vibration attenuating characteristics of SFD were studied.Theexperimental results show that non-concentric SFD will reduce the critical speed of rotor system.Compared with concentric SFD,the damping characteristics of non-concentric SFD are more sensitive to the oil film supply pressure.Concentric SFD can withstand greater unbalance than non-concentric SFD,but non-concentric SFD has better vibration reduction effect in a small range of unbalance.

关 键 词：涡扇发动机 挤压油膜阻尼器 减振特性 高速转子 

分 类 号：V231.96[航空宇航科学与技术—航空宇航推进理论与工程]