Analysis of the Coupled Lateral Torsional Vibration of a Rotor-Bearing System With a Misaligned Gear Coupling

Li, M.; Yu, Lie

doi:10.1006/jsvi.2000.3412

Cited by 62 publications

(31 citation statements)

References 9 publications

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“…Part of the difficulty may arise because the characteristics of misalign ment cover a range of situations and the resulting behaviour arises fro m a co mbination of physical process. Under the misaligned condition, a series of negative dynamic effects such as wear of bearing, bending deformation of shafts, rotor rub-impact and so on [2][3][4], would be induced during the motion process of equipment. The rotor unbalance contributed to the misalignment of the journal bearing is always existent [5].…”

Section: Introductionmentioning

confidence: 99%

“…Hu [9] studied a rig for testing lateral misalignment effects in a flexible rotor supported on three or more hydrodynamic journal bearings. The kinetic mechanism of the rotor system connected by the gear coupling and its faults physical properties were researched by Li [2] and Han [10] form the view point of kinemat ics when they are of misalignment. The dynamic and characteristics of vibration malfunction of various kinds of shaft misalign ment were discussed by Wang [11].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic characteristics of dual-rotor system with coupling faults of misalignment and rub-impact

Huang

2017

MATEC Web Conf.

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Abstract. According to fault problems of the rotor system local rubbing caused by mass eccentricity, a dynamic model for the dual-rotor system with coupling faults of misalignment and rub-impact was established. The dynamic behaviours of this system were investigated by using numerical integral method, as parallel and angular misalignment varied. Various nonlinear phenomena compressing periodic, threeperiodic and quasi-periodic motions are observed. The results reveal that the process of the rotor rub-impact is extremely complex and has some frequencies with large amplitude, especially at the 1/3X component. M eanwhile, quasi-periodic regions exhibit different configurations of attractors and the phenomenon of beat vibration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of dual-rotor system with coupling faults of misalignment and rub-impact

Huang

2017

MATEC Web Conf.

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“…In the rotor system, this state cannot be avoided. The fault caused by misalignment accounts for about 60% of the rotor system fault [1]. Domestic and foreign scholars have made a lot of research on the problem of the misalignment of the gear coupling.…”

Section: Introductionmentioning

confidence: 99%

Study on the meshing force of misaligned gear coupling

Hu¹,

Wang²,

Tan³

et al. 2017

Proceedings of the 2016 International Forum on Mechanical, Control and Automation (IFMCA 2016)

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Abstract. Gear couplings are used to transmit torque, and theoretically all teethes transmitted the same amount of torque and there is no difference in meshing force for each tooth. In practice, due to manufacturing and mounting errors, not all teeth transmit the same amount of torque, and then resulting in an uneven load between teeth and an over loading condition may occur. In this paper, a theoretical model of meshing force of gear coupling in misalignment and the finite element method was used to calculate the meshing force and its variation with the amount of misalignment. The calculated results and the simulation results were compared, and the reasons for the discrepancy were also analyzed. The results in this paper can provide a basis for further corrections to the theoretical model of meshing force of gear coupling in misalignment, and it may take a reference value for engineering applications.

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“…According to incompletely statistics, about 60% of faults in rotating machinery were caused by misalignment [1]. Under the misaligned condition, a series of negative dynamic effects such as bearing, abrasion and bending deformation of shaft, as well as rotor rub-impact [1][2][3], would be induced during the motion process of equipment.…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics of a hydraulic generator unit rotor system with parallel misalignment and rub-impact

et al. 2010

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The object of this research aims at the hydraulic generator unit rotor system. According to fault problems of the generator rotor local rubbing caused by the parallel misalignment and mass eccentricity, a dynamic model for the rotor system coupled with misalignment and rub-impact is established. The dynamic behaviors of this system are investigated using numerical integral method, as the parallel misalignment, mass eccentricity and bearing stiffness vary. The nonlinear dynamic responses of the generator rotor and turbine rotor with coupling faults are analyzed by means of bifurcation diagrams, Poincaré maps, axis orbits, time histories and amplitude spectrum diagrams. Various nonlinear phenomena in the system, such as periodic, three-periodic and quasi-periodic motions, are studied with the change of the parallel misalignment. The results reveal that vibration characteristics of the rotor system with coupling faults are extremely complex and there are some low frequencies with large amplitude in the 0.3-0.4× components. As the increase in mass eccentricity, the interval of nonperiodic motions will be continuously moved forward. It suggests that the reduction in mass eccentricity or increase in bearing stiffness could preclude nonlinear vibration. These might provide some important theory references for safety operating and exact identification of the faults in rotating machinery.

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Analysis of the Coupled Lateral Torsional Vibration of a Rotor-Bearing System With a Misaligned Gear Coupling

Cited by 62 publications

References 9 publications

Dynamic characteristics of dual-rotor system with coupling faults of misalignment and rub-impact

Dynamic characteristics of dual-rotor system with coupling faults of misalignment and rub-impact

Study on the meshing force of misaligned gear coupling

Vibration characteristics of a hydraulic generator unit rotor system with parallel misalignment and rub-impact

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