• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (6): 215-223.doi: 10.3901/JME.2018.06.215

• 交叉与前沿 • 上一篇    下一篇

供油条件对挤压油膜阻尼器等效阻及周向位置阻尼的影响

周海仑1,2, 张明1, 成晓鸣3, 唐振寰3, 曹鹏3   

  1. 1. 沈阳航空航天大学航空航天工程学部 沈阳 110136;
    2. 辽宁省航空推进系统先进测试技术重点实验室 沈阳 110136;
    3. 中国航空动力机械研究所结构强度研究部 株洲 412002
  • 收稿日期:2017-02-08 修回日期:2017-10-23 出版日期:2018-03-20 发布日期:2018-03-20
  • 通讯作者: 周海仑(通信作者),男,1983年出生,博士,副教授,硕士研究生导师。主要研究方向为挤压油膜阻尼器、转子动力学和航空发动机整机振动。E-mail:hlzhou@nuaa.edu.cn
  • 作者简介:张明,男,1991年出生。主要研究方向挤压油膜阻尼器和航空发动机整机振动。E-mail:624132864@qq.com
  • 基金资助:
    国家自然科学基金(51505300)、航空科学基金(2014ZB54008)、辽宁省自然科技基金(2015020126)资助项目。

Effects of Oil Supply Conditions on Equivalent Damping and Circumferential Position Damping of Squeeze Film Damper

ZHOU Hailun1,2, ZHANG Ming1, CHENG Xiaoming3, TANG Zhenhuan3, CAO Peng3   

  1. 1. Faculty of Aerospace Engineering, Shenyang Aerospace University, Shenyang 110136;
    2. Liaoning Key laboratory of Advanced Test Technology for Aerospace Propulsion System, Shenyang 110136;
    3. China Aviation Power Plant Research Institute, Zhuzhou 412002
  • Received:2017-02-08 Revised:2017-10-23 Online:2018-03-20 Published:2018-03-20

摘要: 为研究供油条件对挤压油膜阻尼器减振特性的影响,利用计算流体力学软件进行阻尼器的建模和数值仿真模拟。为了保证数值模拟的正确性和合理性,借助于双向激励试验器,基于机械阻抗法获得油膜阻尼,与数值仿真结果进行对比验证。通过数值仿真,研究供油孔数量、供油孔横截面积、供油槽尺寸以及供油流量等对阻尼器等效阻尼和周向位置阻尼的影响。结果表明:由于受到供油孔处的供油压力影响,单孔供油阻尼器提供的阻尼随周向位置呈现近似简谐函数曲线的变化规律,多个对称分布的供油孔可以有效地抑制这种影响,含有三个或者四个对称供油孔的阻尼器,不同周向位置的阻尼在一个进动周期内几乎保持不变。对于供油槽较浅的情况,阻尼器的等效阻尼随着偏心率的增加呈现非线性增加的趋势;随着供油槽深度的增加,非线性增加的趋势逐渐减弱;而供油槽较深时,等效阻尼随着偏心率的增加先减小后增加。另外,阻尼器供油槽宽度和供油流量对阻尼器的阻尼特性也有着明显的影响。研究结果将为挤压油膜阻尼器的设计提供依据。

关键词: 供油条件, 挤压油膜阻尼器, 计算流体力学, 阻尼

Abstract: In order to study the effect of oil supply conditions on the damping characteristics of squeeze film damper, the damper modeling and numerical simulation are carried out by using computational fluid dynamics software. To ensure the correctness and rationality of the numerical simulation, the damping of the oil film is obtained by the bi-direction excitation rig based on the principle of mechanical impedance and compared with the numerical simulation results. The influence of the number of oil supply holes, the cross-sectional area of the oil supply hole, the size of the oil supply groove and the oil supply flow on the equivalent damping and circumferential damping of the damper are studied. The results show that, due to the influence of oil film pressure at the oil supply hole, the damping of the single hole oil supply damper presents the variation of the approximate harmonic function curve with the circumferential position, and the multiple symmetrically distributed feed holes can effectively suppress this effect. With three or four symmetrical feed holes in the damper, the damping of the different circumferential positions in one cycle is almost constant. For the shallow oil supply groove, the equivalent damping of the damper increases nonlinearly with the increasing of the eccentricity. When the oil supply groove is deep, the equivalent damping tends to decrease firstly and then increase with the increase of eccentricity. In addition, the damping characteristics of the damper are influenced by the width of the oil supply groove and the flow rate of the oil supply. The results will provide the basis for the design of squeeze film damper.

Key words: computational fluid dynamics, damping, oil supply conditions, squeeze film damper

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