同心与非同心挤压油膜阻尼器减振特性对比试验研究

冯义; 邓旺群; 刘文魁; 袁胜; 胡廷勋

doi:10.13433/j.cnki.1003-8728.20220085

同心与非同心挤压油膜阻尼器减振特性对比试验研究

doi: 10.13433/j.cnki.1003-8728.20220085

冯义^1,,
邓旺群^{1, 2, ,},
刘文魁¹,
袁胜¹,
胡廷勋¹

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

基金项目: 航空科学基金项目（2013ZB08001）

详细信息

作者简介:
冯义（1997−），硕士研究生，研究方向为航空发动机结构强度与振动，fengyi2101@163.com

通讯作者:
邓旺群，研究员，博士生导师，博士，hnzzdwq@163.com

中图分类号: V231.96
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- 被引次数: 0
出版历程
- 收稿日期: 2021-10-27
- 刊出日期: 2023-06-25

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

FENG Yi^1
,,
DENG Wangqun^{1, 2
, ,},
LIU Wenkui¹,
YUAN Sheng¹,
HU Tingxun¹

1.
AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, Hu' nan, China
2.
Key Laboratory of Aero-engine Vibration Technology, Aero Engine Corporation of China, Zhuzhou 412002, Hu' nan, China

摘要

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。
- 涡扇发动机 /
- 挤压油膜阻尼器 /
- 减振特性 /
- 高速转子
Abstract: 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.
- turbofan engine /
- squeeze film damper /
- vibration attenuating characteristics /
- high speed rotor

HTML全文

图 1 低压模拟转子结构简图

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图 2 同心型SFD结构简图

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图 3 鼠笼弹支的三维图

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图 4 非同心SFD结构简图

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图 5 非同心SFD的三维图

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图 6 转子安装及测试示意图

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图 7 转子在高速旋转试验器上的安装照片

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图 8 同心/非同心SFD-转子系统的动力特性对比

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图 9 3种供油压力下非同心SFD-转子系统的不平衡响应

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图 10 3种供油压力下同心SFD-转子系统的不平衡响应

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图 11 不同不平衡量下非同心SFD-转子系统的不平衡响应

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图 12 不同不平衡量下同心SFD-转子系统的不平衡响应

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表 1 前3阶临界转速试验值

测点	非同心临界转速/（r·min⁻¹）			同心临界转速/（r·min⁻¹）
测点	1阶	2阶	3阶	1阶	2阶	3阶
D₁	3699	7089	11160	4120	7028	11431
D₂	3699	7089	11280	4120	7028	11431
D₃	3761	6009	11160	4120	7028	11431
D₄	不明显	6517	11160	4120	7416	11463
平均值	3720	6676	11190	4120	7125	11439

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表 2 第3阶临界转速下的转子挠度

状态	转子挠度/μm
状态	0 g·mm	12.58 g·mm	20.57 g·mm	64.09 g·mm	108.46 g·mm
非同心SFD	226	258	260	310	496
同心SFD	434	452	470	484	517

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表 3 第3阶临界转速下的转子挠度增长变化量

状态	转子挠度变化量/μm
状态	0 ~ 12.58 g·mm	0 ~ 20.57 g·mm	0 ~ 64.09 g·mm	0 ~ 108.46 g·mm
非同心SFD	32	34	84	270
同心SFD	18	36	47	83

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