Parameter Analysis of an Intershaft Dual-Rotor with the Application of Squeeze Film Dampers

Huizheng Chen,Shun Zhong,Zhenyong Lu,Xiyu Liu,Yushu Chen,Yong-Feng Yang

doi:10.1155/2021/7182260

Huizheng Chen, Shun Zhong + Show 4 more

Open Access

https://doi.org/10.1155/2021/7182260

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Abstract

The squeeze film damper is usually adopted in the rotor system to suppress the vibrating motion of the rotor system. In this work, not only are the physical parameters of the squeeze film damper analyzed but also the system parameters, like the number of squeeze film dampers used and squeeze film damper implementation positions, are analyzed. The amplitude-frequency curves are obtained by conducting the simulation of a dual-rotor, intershaft, and oil film force concatenated model. Through the analysis and comparisons of the results, the vibration suppression effects of the squeeze film damper with different parameter configurations are analyzed and summarized. This work contributes to further optimization and dynamical analysis work on rotor systems with the application of the squeeze film damper.

Highlights

Among various types of aeroengines [1,2,3], turbofan engines are relatively common and draw much research attention [4,5,6,7,8,9]. e typical structure of turbofan engines is a dual-rotor structure with a low-pressure rotor and a high-pressure rotor
In most of the dual-rotor designs, the high- and the low-pressure rotors are connected by intershaft bearings [10, 11]. e nonlinear factor introduced by the intershaft leads the research on dual-rotor system to be more complex
Shaik and Dutta [12, 13] purposed a close form solution to find the nonlinear tuning parameters of symmetric/asymmetric rotor-squeeze film damper system. ey dealt with the development of a close form solution to find the stability of flexible symmetric horizontal rigid and tuned flexible rotor mounted on hydrodynamic bearing with squeeze film damper system

Summary

Introduction

Among various types of aeroengines [1,2,3], turbofan engines are relatively common and draw much research attention [4,5,6,7,8,9]. e typical structure of turbofan engines is a dual-rotor structure with a low-pressure rotor and a high-pressure rotor. In most of the dual-rotor designs, the high- and the low-pressure rotors are connected by intershaft bearings [10, 11]. Ma et al [16] emphasized the comparative analysis of the influence of SFD on the nonlinear dynamic behavior of the dual-rotor system supported by rolling bearings. E high-pressure rotor is connected directly with the base by a rolling bearing and an elastic structure at the left end and through an intershaft bearing at the other end with the low-pressure shaft. Nb. If the horizontal and vertical displacement components of the inner and outer rings of the bearing are xi, xo, yi, and yo, respectively, the radial position relationship between the journal and each roller is δi xi − xo􏼁cos ci + yi − yo􏼁sin ci − δ0,.

Parameter Analysis

N zFbx zx1

Conclusions and Discussions

Conflicts of Interest