Study on the Dynamic Characteristics of a Water-lubricated Pump Bearing : 1st Report, Cylindrical Bearing under High Ambient Pressure

Kanki, Hiroshi; Ozawa, Yutaka; Oda, Takanobu; Kawakami, Takashi

doi:10.1299/jsme1958.29.1824

Cited by 3 publications

(1 citation statement)

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“…Kanki et al [5] used a special testing system to determine the dynamic characteristics of water lubricated bearings by applying sinusoidal excitation forces in the x-and y-directions (perpendicular to the rotor axis) by means of hydraulic actuators and measuring the journal displacement to determine the transfer function. They used two methods: (a) the first provided for the application of excitation force with phase difference of 90 deg in the x and y directions and (b) by applying the excitation forces at two different frequencies in the x and y directions simultaneously.…”

Section: Introductionmentioning

confidence: 99%

A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory

Snyder

Braun

2019

Lubricants

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A general, CFD-based frequency response method for obtaining the dynamic coefficients of hydrodynamic bearings is presented. The method is grounded in experimental parameter identification methods and is verified for an extremely long, slider bearing geometry as well as short and long journal bearing geometries. The influence of temporal inertia on the dynamic response of the bearings is discussed and quantified through the inclusion of added mass coefficients within the mechanical models of the hydrodynamic bearing films. Methods to separate the dynamic stiffness into static stiffness and added mass contributions are presented and their results compared. Harmonic perturbations are applied to the bearings at varying frequencies to determine the frequency dependence of the dynamic coefficients and to facilitate the decomposition of the dynamic stiffness into its constituents. Added mass effects are shown to be significant for the extremely long slider bearing geometry and negligible for the short and long journal bearing geometries under operating conditions motivated by those typical of marine bearings.

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Section: Introductionmentioning

confidence: 99%

A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory

Snyder

Braun

2019

Lubricants

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A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Babu

Raj²,

Lakshmanan

2015

J. mech.

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The journal bearings are used to support high-speed rotors in turbo machinery which often operate above the rotor first bending critical speed. This bearing provide both lateral support and dynamic coefficients: Stiffness, damping, and mass terms, related to machine vibrations. The various methods of identifying journal bearing dynamic characteristics, from measured data, obtained from different measurement systems, are reviewed. The various approaches to the bearing identification problem are discussed. The various data processing methods in the time and frequency domains are presented. Also, vibration and condition monitoring techniques are presented. In this review, the relative strengths and weaknesses of bearing are presented and developments and trends in improving bearing measurements are documented. Future trends of journal bearing are discussed.

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Rotordynamic Analysis of Submerged Motor Pumps : Influence of Long Seal on the Stability of Fluid Machinery

Kanemori¹,

Iwatsubo²

1994

JSME international journal. Ser. C, Dynamics, control, robotics

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Study on the Dynamic Characteristics of a Water-lubricated Pump Bearing : 1st Report, Cylindrical Bearing under High Ambient Pressure

Cited by 3 publications

References 0 publications

A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory

A CFD-Based Frequency Response Method Applied in the Determination of Dynamic Coefficients of Hydrodynamic Bearings. Part 1: Theory

A Review on Application of Dynamic Parameters of Journal Bearing for Vibration and Condition Monitoring

Rotordynamic Analysis of Submerged Motor Pumps : Influence of Long Seal on the Stability of Fluid Machinery

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