Lubrication Analysis of Floating Ring Bearings Considering Floating Ring Heat Transfer

Li, Jiaqi; Ni, Jimin; Qi-wei, Wang

doi:10.4271/2016-01-0485

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…The geometric and operating parameters are given in the work of Li et al (2017) for a turbocharger FRB; ring deformation is considered in their work as well. Inputting the parameters into the computational procedure, the results are compared in Table 3.…”

Section: Validation Of Theoretical Modelsmentioning

confidence: 99%

Influence of floating ring elastic deformation on ring equilibrium and minimum film thickness for a hydrodynamic/hydrostatic floating ring bearing

Yang,

Hou,

et al. 2023

ILT

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Purpose The floating ring generates elastic deformation as the film pressure for high-speed floating ring bearings (FRBs). The purpose of this study is to investigate the influence of ring elastic deformation on the performance of a hydrodynamic/hydrostatic FRB, including floating ring equilibrium and minimum film thickness. Design/methodology/approach The finite element method and finite difference method are used to solve thermohydrodynamic (THD) lubrication models, including the Reynolds equation, energy equation and temperature–viscosity equation. The deformation matrix method is applied to solve the elastic deformation equation, and then the deformation distribution, floating ring equilibrium and minimum film thickness are investigated. The maximum pressure is compared with the published article to verify the mathematical models. Findings The deformation value increases with the growth of shaft speed; owing to elastic deformation on the film reaction force and friction moment, the ring achieves equilibrium at a new position, and the inner eccentricity increases while the ring-shaft speed ratio declines. The minimum film thickness declines with the growth of inlet temperature, and the outer film tends to rupture considering elastic deformation at a higher temperature. Originality/value The floating ring elastic deformation is coupled with the THD lubrication equations to study ring deformation on the hydrodynamic/hydrostatic FRB lubrication mechanism. The elastic deformation of floating ring should be considered to improve analysis accuracy for FRBs. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2023-0139/

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Section: Validation Of Theoretical Modelsmentioning

confidence: 99%

Influence of floating ring elastic deformation on ring equilibrium and minimum film thickness for a hydrodynamic/hydrostatic floating ring bearing

Yang,

Hou,

et al. 2023

ILT

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“…Specifically, as the speed increased, the speed ratio would firstly rise rapidly and then fall gradually, indicating that there was an optimum speed range for the sleeve [9]. Li et al researched the lubricating property of the floating sleeve in high-speed and light-load condition and mainly discussed the influence of thermal elastic deformation on the lubricating property of the floating sleeve [10].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Research on the Floating‐Sleeve Bearing Applied in Roller‐Cone Bit

Yang

Cheng³

2019

Shock and Vibration

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In oil and gas drilling, the roller-cone bit and the hybrid bit configured with roller cones are two commonly used rock-breaking tools; however, service lives of the bits are limited by the sliding bearings therein. In order to improve the performance and reliability of the bearing in the roller cone, a novel bearing with a floating sleeve is researched in this paper. Firstly, motion characteristics of the bearing are researched, and motion relations between the elements in the bearing are analyzed, respectively. Then, on the basis of the motion relations, three motion statuses of the float sleeve are clarified, including the sleeve start to rotate, the sleeve rotates stably with the pushing force exerted by the rollers, and the sleeve rotates stably with the opposing force exerted by the rollers. At last, bearing performances in three different conditions are respectively tested in the experiment. The results, with the specific speed value being in the range of 0.375∼0.833 and the average value in 0.613∼0.618, show that the sleeves with 6∼12 rollers are able to start and rotate stably under 5 kN radial load, indicating that the sleeves can be started to rotate and work stably, whereas, for the sleeve with less than 4 rollers, the specific speed value varies in the large range of 0∼1.176, indicating that this sleeve cannot rotate stably in the bearing. This research revealed that the amount of rollers is an important factor that determines whether the sleeve is able to float stably in the bearing; therefore, roller quantity should be focused in the bearing design to optimize its performance.

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“…Thermal effect has long been assumed to be the cause of the decrease in speed ratio. 10–13 San Andres and Kerth 11 solve lumped energy equation with viscous heat generation and consider convective heat transfer between fluid and solid to predict the temperature-dependent viscosity.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of subsynchronous vibration in floating ring bearings

Wang

Ren

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part J:

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Floating ring bearings are popular among turbochargers due to their simplicity and reliability. The disappearance of subsynchronous vibration with the increase of shaft speed in a low oil-supplied pressure floating ring bearing is reported by Hatakenaka and Yanai. This finding may help eliminate the noise and decrease the loss of turbochargers. This work aims to explain this phenomenon in the low oil-supplied floating ring bearing using computational fluid dynamic. Steady computational fluid dynamic calculation is conducted to validate the effect of air entrainment. Transient computational fluid dynamic calculation method with mesh motion method is established. The subsynchronous vibration of the shaft can be obtained by discrete Fourier transform analysis. The results are validated by comparing them with those in the literature. It is found that the disappearance of the subsynchronous vibration is the result of the change in lubricant properties caused by the air entrainment.

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Lubrication Analysis of Floating Ring Bearings Considering Floating Ring Heat Transfer

Cited by 7 publications

References 16 publications

Influence of floating ring elastic deformation on ring equilibrium and minimum film thickness for a hydrodynamic/hydrostatic floating ring bearing

Influence of floating ring elastic deformation on ring equilibrium and minimum film thickness for a hydrodynamic/hydrostatic floating ring bearing

Theoretical and Experimental Research on the Floating‐Sleeve Bearing Applied in Roller‐Cone Bit

Numerical investigation of subsynchronous vibration in floating ring bearings

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