Effect of G-type integral squeeze film damper on the dynamic characteristics in rotor system

IF 0.7 4区工程技术 Q4 ENGINEERING, AEROSPACE International Journal of Turbo & Jet-Engines Pub Date : 2022-03-21 DOI:10.1515/tjj-2021-0046

Wei Yan, Lidong He, Gang Zhu, Xingyun Jia

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引用次数: 1

Abstract

Abstract To solve the problems of the nonlinear damping force in the traditional squeeze film damper (SFD), a novel structure of G-type integral squeeze film damper (GISFD) based on ISFD is proposed for the first time. The finite element model and test rig of the ball bearing-rotor system are established to explore the influence of GISFD and ISFD on the dynamic characteristics of the unbalanced rotor system. The results show that both GISFD and ISFD can change the critical speed of the rotor system, reduce the bending strain energy of the shaft, and reduce the bearing dynamic load of the rotor system. Through comparison, it is found that the effect of GISFD is more obvious. The experimental results show that, compared with the unbalanced rotor system without damper, the peak-peak value of amplitude in the rotor system with GISFD and ISFD at 3000 rpm is reduced by 25.53 and 15.81%. The amplitude in the disk at the first-order critical speed is effectively reduced, and the reduction range reach 52.01 and 35.44%, respectively. GISFD has a more significant effect of suppressing unbalanced vibration, and has superior vibration damping performance when compared with ISFD.

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g型整体挤压膜阻尼器对转子系统动态特性的影响

摘要针对传统挤压膜阻尼器阻尼力非线性的问题，首次提出了一种基于ISFD的新型g型积分挤压膜阻尼器结构。建立了滚珠轴承-转子系统的有限元模型和试验台，探讨了GISFD和ISFD对不平衡转子系统动态特性的影响。结果表明，GISFD和ISFD都能改变转子系统的临界转速，降低轴的弯曲应变能，降低转子系统的轴承动载荷。通过对比发现，GISFD的效果更为明显。实验结果表明，与不加阻尼器的不平衡转子系统相比，加了GISFD和ISFD的转子系统在3000 rpm时的幅值峰值分别降低了25.53%和15.81%。在一阶临界转速下，盘内幅值有效减小，幅度分别达到52.01和35.44%。GISFD对不平衡振动的抑制效果更为显著，与ISFD相比具有更优越的减振性能。

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来源期刊

International Journal of Turbo & Jet-Engines 工程技术-工程：宇航

CiteScore

1.90

自引率

11.10%

发文量

审稿时长

6 months

期刊介绍： The Main aim and scope of this Journal is to help improve each separate components R&D and superimpose separated results to get integrated systems by striving to reach the overall advanced design and benefits by integrating: (a) Physics, Aero, and Stealth Thermodynamics in simulations by flying unmanned or manned prototypes supported by integrated Computer Simulations based on: (b) Component R&D of: (i) Turbo and Jet-Engines, (ii) Airframe, (iii) Helmet-Aiming-Systems and Ammunition based on: (c) Anticipated New Programs Missions based on (d) IMPROVED RELIABILITY, DURABILITY, ECONOMICS, TACTICS, STRATEGIES and EDUCATION in both the civil and military domains of Turbo and Jet Engines. The　International Journal of Turbo & Jet Engines　is devoted to cutting edge research in theory and design of propagation of jet aircraft. It serves as an international publication organ for new ideas, insights and results from industry and academic research on thermodynamics, combustion, behavior of related materials at high temperatures, turbine and engine design, thrust vectoring and flight control as well as energy and environmental issues.