Study on the vibration control method of a turboshaft engine rotor based on piezoelectric squeeze film damper oil film clearance

IF 1 4区工程技术 Q4 ENGINEERING, MECHANICAL Mechanical Sciences Pub Date : 2023-05-17 DOI:10.5194/ms-14-237-2023

Qingxiong Lu, ChaoĀ Li, Yangyang Zhang, H. Fang, G. Bin

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Abstract

Abstract. In the complex environment of the battlefield and dust weather, hard objects including birds, bullets, sand and others will inevitably cause impact damage to the compressor blades of turboshaft engines. The damage will further result in fatigue vibration of the gas generator rotor and catastrophic accidents such as excessive engine vibration and even crash. The relation between oil film clearance of dampers and damping of rotor systems as well as the damping and vibration amplitude of a rotor system are analyzed. The functional relation between oil film clearance and vibration amplitude is derived. Taking the gas generator rotor of a certain turboshaft engine as an example, the rotor dynamic model of a gas generator rotor with oil film bearing clearance is constructed, and the vibration response of the rotor system under different oil film clearances is analyzed. A new type of squeeze film damper (SFD) structure with piezoelectric-driven split pads is innovatively designed, and the vibration control system of the gas generator rotor is built. In addition, experimental research on rotor fault vibration control under different oil film clearances is carried out. The results show that, within a certain range, when oil film clearance decreases, amplitude will decrease. Under the experimental conditions, when the driving voltage of the piezoelectric actuator is adjusted from 0 to 70 V, the oil film clearance decreases from 156 to 118 µm. Then, the vibration amplitude decreases and gradually reaches stability after 0.036 s, and the vibration amplitude of the rotor system decreases by 12 %. When the driving voltage of the piezoelectric actuator is adjusted to 150 V, the oil film clearance decreases to 76 µm, and the vibration amplitude of the rotor system decreases by 28 %. When the new SFD adopts a piezoelectric-driven split-pad structure, the structure can adjust quickly the oil film clearance online so as to control the vibration of the rotor system. The research results can provide a technical reference for the vibration control of turboshaft engine rotor systems.

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基于压电挤压油膜阻尼器油膜间隙的涡轴发动机转子振动控制方法研究

摘要在战场和沙尘天气的复杂环境中，鸟类、子弹、沙子等坚硬物体不可避免地会对涡轴发动机的压气机叶片造成冲击损伤。这种损坏将进一步导致燃气发电机转子的疲劳振动和发动机过度振动甚至碰撞等灾难性事故。分析了阻尼器油膜间隙和转子系统阻尼的关系，以及转子系统阻尼和振幅的关系。推导了油膜间隙与振幅之间的函数关系。以某涡轴发动机燃气发生器转子为例，建立了具有油膜轴承间隙的燃气发生器转子动力学模型，分析了不同油膜间隙下转子系统的振动响应。创新性地设计了一种新型的压电驱动分裂片挤压油膜阻尼器（SFD）结构，并建立了气体发生器转子的振动控制系统。此外，还对不同油膜间隙下的转子故障振动控制进行了实验研究。结果表明，在一定范围内，当油膜间隙减小时，振幅会减小。在实验条件下，当压电激励器的驱动电压从0调节到70时 V、油膜间隙从156减小到118 µm。然后，振幅减小，并在0.036之后逐渐达到稳定 s、转子系统的振幅减小了12 %. 当压电执行器的驱动电压调整到150时 V、油膜间隙降至76 µm，转子系统的振幅减小28 %. 当新型SFD采用压电驱动的分离垫结构时，该结构可以在线快速调整油膜间隙，从而控制转子系统的振动。研究结果可为涡轴发动机转子系统的振动控制提供技术参考。

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来源期刊

Mechanical Sciences ENGINEERING, MECHANICAL-

CiteScore

2.20

自引率

7.10%

发文量

审稿时长

29 weeks

期刊介绍： The journal Mechanical Sciences (MS) is an international forum for the dissemination of original contributions in the field of theoretical and applied mechanics. Its main ambition is to provide a platform for young researchers to build up a portfolio of high-quality peer-reviewed journal articles. To this end we employ an open-access publication model with moderate page charges, aiming for fast publication and great citation opportunities. A large board of reputable editors makes this possible. The journal will also publish special issues dealing with the current state of the art and future research directions in mechanical sciences. While in-depth research articles are preferred, review articles and short communications will also be considered. We intend and believe to provide a means of publication which complements established journals in the field.