Results 1 to 10 of about 283 (77)
Unstable outer cylinder whirl of concentric double rotating cylinder system
Mechanical Engineering Journal, 2023 This research investigates unstable outer cylinder whirl in a double rotating cylinder system, with both co- and counter-rotation, in which the axis of the outer cylinder is supported elastically in the radial direction and the axis of the inner cylinder
Fumitaka YOSHIZUMI, Masanori IRITANI
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Unstable inner cylinder whirl of concentric double rotating cylinder system
Mechanical Engineering Journal, 2022 This research investigated unstable inner cylinder whirl in a double rotating cylinder system in which the axis of the inner cylinder is supported elastically in the radial direction and the axis of the outer cylinder is fixed.
Fumitaka YOSHIZUMI, Masanori IRITANI
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Study on Thermal Unstable Vibration of Rotor under Journal Whirl with Large Amplitude in Journal Bearing [PDF]
International Journal of Rotating Machinery, 2020 To investigate the thermal unstable vibration caused by journal whirls with large amplitude in journal bearing, an analysis model of lubricant film thickness is established.
Qilong Hu, Min Zhu, Jiangang Yang
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Unstable simultaneous whirl of two cylinders in a concentric double rotating cylinder system
Mechanical Engineering JournalThis study investigated the unstable simultaneous whirl of two cylinders in a concentric double rotating cylinder system, with both co- and counter-rotation. The axes of both cylinders were radially elastically supported independently of each other.
Fumitaka YOSHIZUMI, Masanori IRITANI
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Unbalance-induced whirl of a rotor supported by oil-film bearings
Comptes Rendus. Mécanique, 2021 This paper presents a nonlinear stability analysis of an unbalanced rotor-bearing system using the numerical continuation method and the numerical integration method.
Sghir, Radhouane
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Analysis of the Turbulent Lubrication of a Textured Hydrodynamic Journal Bearing
Lubricants, 2023 In order to investigate the turbulent lubrication performance of a textured hydrodynamic journal bearing (THJB), a model of turbulent lubrication was established in this paper. The variations in the Reynolds number, oil film thickness, oil film pressure,
Yazhou Mao +3 more
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Applied Sciences, 2022 A sliding bearing system performs a critical function in a rotating machinery system and provides support for the rotating components. In this paper, a single-rotor experimental rig and a dual-rotor sliding bearing experimental rig were independently ...
Zhiguo Feng +3 more
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Simplified prediction of stability limit for oil film bearing rotor systems
Nihon Kikai Gakkai ronbunshu, 2020 Oil film bearings are often used in large rotating machinery because they have large load capacity and damping coefficients. They, however, generate fluid forces and cause unstable vibrations such as oil whirl and oil whip at high rotational speed ...
Yasuhisa SEKIGUCHI +3 more
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Effects of Cage Pocket Shapes on Dynamics of Angular Contact Ball Bearings
Tribology Online, 2020 The dynamic models of spherical and cylindrical pocket cages are established based on the dynamic wear simulation model of angular contact ball bearings, and the predicted results are in reasonable agreement with the experimental observations.
Shijin Chen +3 more
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Pump rotor 2 DOF reduced model and unstable onset speed evaluation
Nihon Kikai Gakkai ronbunshu, 2019 Because horizontal multi-stage pumps have journal bearings and a balancing piston with narrow gap, it is needed to prevent self-excited vibrations caused by fluid forces in these gaps. For the rotor system, because it is challenging to find the stability
Akira ARAI +2 more
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