Theoretical and Experimental Study of Spindle Ball Bearing Nonlinear Stiffness

Madoliat, Reza; Ghanati, Mohammad Faraji

doi:10.1017/jmech.2013.48

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…Paper [6] is aimed at theoretical and experimental study of spindle ball bearing nonlinear stiffness.…”

Section: 2 Literature Reviewmentioning

confidence: 99%

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Pavlenko¹,

Demyanenko²,

Edl³

et al. 2018

JES

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This article dials with the refinement of the mathematical and computational models of the oxidizer turbopump rotor considering bearing gaps, axial preloading, compliance of the housing parts and the effect of rotation. The loading scheme consists of four substeps is proposed considering preliminary displacement of the outer cage, axial displacement as a result of the support deformation due to the axial preloading force, radial displacement due to the support deformation, as well as centrifugal forces of inertia caused by rotation of the rotor with an inner cage. Modelling of contacts interactions using ANSYS software is carried out according to the appropriate models of contact behaviour. The contact areas between the rolling elements, inner and outer cases are obtained. The contact angle is determined. Isosurfaces of axial and radial displacements for the bearing supports are built. Nonlinear stiffness of bearing supports is determined as the tangent of the angle of inclination for the curve "radial loadradial displacement". The proposed approach, which used for designing turbopump units for liquid rocket engines, will allow refining the reliable mathematical and computational models of rotor dynamics for turbopump units and providing appropriate computer simulation of forced oscillations of the rotor systems for given permissible residual imbalances considering nonlinear stiffness characteristics of bearing supports.

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“…Paper [6] is aimed at theoretical and experimental study of spindle ball bearing nonlinear stiffness.…”

Section: 2 Literature Reviewmentioning

confidence: 99%

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Pavlenko¹,

Demyanenko²,

Edl³

et al. 2018

JES

View full text Add to dashboard Cite

show abstract

“…New non-invasive techniques, such as acoustic study, are trying to improve predictive maintenance [21,23], but involve environmental problems. The approach by spectral analysis of the vibrations is the most widespread technique, but it requires several control points and daily monitoring, resulting in a large cost in terms of time and personnel [20].…”

Section: Introductionmentioning

confidence: 99%

Evaluation procedure for blowing machine monitoring and predicting bearing SKFNU6322 failure by power spectral density

Gutiérrez¹,

Garrido²,

Dávila³

et al. 2021

Eksploatacja i Niezawodność – Maintenance and Reliability

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This work shows the results of the comparative study of characteristic frequencies in terms of Power Spectral Density (PSD) or RMS generated by a blower unit and the SKFNU322 bearing. Data is collected following ISO 10816, using Emonitor software and with speed values in RMS to avoid high and low frequency signal masking. Bearing failure is the main cause of operational shutdown in industrial sites. The difficulty of prediction is the type of breakage and the high number of variables involved. Monitoring and analysing all the variables of the SKFNU322 bearing and those of machine operation for 15 years allowed to develop a new predictive maintenance protocol. This method makes it possible to reduce from 6 control points to one, and to determine which of the 42 variables is the most incidental in the correct operation, so equipment performance and efficiency is improved, contributing to increased economic profitability. The tests were carried out on a 500 kW unit of power and It was shown that the rotation of the equipment itself caused the most generating variable of vibrational energy.

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Modeling and prediction of spindle dynamic precision using the Kriging-based response surface method with a novel sampling strategy

et al. 2022

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Theoretical and Experimental Study of Spindle Ball Bearing Nonlinear Stiffness

Cited by 10 publications

References 8 publications

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Comprehensive Approach for Identification of Nonlinear Stiffness Characteristics of Bearing Supports for the Oxidizer Turbopump of the Liquid Rocket Engine

Evaluation procedure for blowing machine monitoring and predicting bearing SKFNU6322 failure by power spectral density

Modeling and prediction of spindle dynamic precision using the Kriging-based response surface method with a novel sampling strategy

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