Numerical and experimental study of a rotor–bearing–seal system

Cheng, Ming; Meng, Guang; Jing, Jianping

doi:10.1016/j.mechmachtheory.2006.04.010

Cited by 32 publications

(11 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…rotor-seal system were investigated using Muszynska's dynamic force model of the seal fluid [5]. Cheng [6] had analyzed the complicated non-linear vibrations of a rotor-bearing-seal system using a model considering non-linear oil-film forces and Muszynska's seal forces. The conventional model with eight parameters was developed by Muszynska's model at certain extent.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Flow Induced Vibration in a Rotor-Seal System

Zhang

Liu

Chu

2011

Shock and Vibration

View full text Add to dashboard Cite

Flow induced vibration is an important factor affecting the performance of the rotor-seal system. From the point of view of flow induced vibration, the nonlinear models of the rotor-seal system are presented for the analysis of the fluid force, which is induced by the interaction between the unstable fluid flow in the seal and the vibrating rotor. The nonlinear characteristics of flow induced vibration in the rotor-seal system are analyzed, and the nonlinear phenomena in the unbalanced rotor-seal system are investigated using the nonlinear models. Various nonlinear phenomena of flow induced vibration in the rotor-seal system, such as synchronization phenomenon and amplitude mutation, are reproduced.

show abstract

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Flow Induced Vibration in a Rotor-Seal System

Zhang

Liu

Chu

2011

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…, I 6 are integrals, which are presented in Appendix 2. The quadratic parts of the fluid film forces F x,2 ; F y,2 (25) can be presented in the following form:…”

Section: Problem Formulation and The Equations Of Motionsmentioning

confidence: 99%

“…They analyzed the Lyapunov exponents of chaotic attractors. Periodic and quasiperiodic motions of a rotor-bearing-seal coupled system are analyzed in [25]. The dynamic analysis of the rotor-bearing system accounting the rub-impact between rotor and stator is presented in [26].…”

mentioning

confidence: 99%

Nonlinear dynamics of one disk asymmetrical rotor supported by two journal bearings

Аврамов

Borysiuk

2011

Nonlinear Dyn

View full text Add to dashboard Cite

Asymmetrical one disk rotor interacting with fluid films of short journal bearings is considered. Gyroscopic moments acting on a disk are taken into account. The forces of the journal bearing fluid film are derived analytically. The system of four nonlinear ordinary differential equations is obtained to study the rotor vibrations. The origination of self-sustained vibrations of rotor is studied by means of Shaw-Pierre nonlinear modes. The harmonic balance method is applied to study the self-sustained vibrations with large amplitudes.

show abstract

“…Recently the demand for more powerful and efficient rotating machinery has led to higher operating speed and working pressure, which results in the need of reliable components such as bearings and seals. Not only in bearing, but also in seals, the shaft motion can induce rotor dynamic forces that may lead to self-excited vibration of the shaft [1]. With the increase in the rotating speed, the performances of the rotor system are significantly influenced by the characteristics of the seal [2].…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of a cracked rotor-bearing-seal system

Huang

2019

MATEC Web Conf.

View full text Add to dashboard Cite

With the structural parameters of the rotation machinery increased, the seal fluid induced force imposed on the rotor will significantly increase. Taking a cracked rotor-bearing-seal system as object the non-linear dynamic behaviours of the coupled system are investigated using numerical integration method. For the crack in shaft, the segmented switch function is applied to express the process of the crack's opening and closing in rotation, and the cross stiffness originated from crack is considered. Various nonlinear phenomena compressing periodic, quasi-periodic and chaotic motions in the rotor system are analysed. The research results show that the unstable form of the rotor system is Hopf bifurcation when the crack depth is smaller. The influence to the response of the system increased along with the crack depth, the unstable form of the coupled system is period-doubling bifurcation. The seal clearance has an important impact on stability of the cracked rotor system. In other words, the fluid induced force can reduce the periodic responses of the rotor. It is indicated that this study can contribution to a further understanding of the nonlinear of such a rotor-bearing system with crack and seal.

show abstract

Numerical and experimental study of a rotor–bearing–seal system

Cited by 32 publications

References 12 publications

Dynamic Characteristics of Flow Induced Vibration in a Rotor-Seal System

Dynamic Characteristics of Flow Induced Vibration in a Rotor-Seal System

Nonlinear dynamics of one disk asymmetrical rotor supported by two journal bearings

Dynamic response of a cracked rotor-bearing-seal system

Contact Info

Product

Resources

About