Numerical Simulation of Magnetic Fluid Lubrication

Wang, Li Jun; Yan, X.; Li, Fei Hu; Dong, Zi Xin

doi:10.4028/www.scientific.net/amr.154-155.1498

Cited by 3 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of small slide-roll ratios (s = 0.02-0.5), this curve basically maintains flat on the bottom, as shown in Figure 14b. Similar inclination phenomenon can also be found in literature [20]. The larger slide-roll ratio implies larger relative sliding velocity between the matching surfaces, in which case the higher film temperature rise occurs at the outlet.…”

Section: At Varied Slide-roll Ratiosupporting

confidence: 87%

“…Besides, the detailed expressions of r=h ð Þ e , h e , h 0 e , r e , r 0 e and r 00 e are given by Yang and Wen [20,21].…”

Section: Governing Equationsmentioning

confidence: 99%

“…In detail, z ¼ z=h aims for the plate A (lower solid) when Àh t z 0, for the lubricant film when 0 z h, and for the ellipsoid B (upper solid) when h z h + h t . Here, h t is equal to 3.15a [20], in which the boundary locations are regarded as sufficiently far from the oil-solid interfaces. Below this value, the solid temperature is not change along the film thickness direction.…”

Section: Solution Schemementioning

confidence: 99%

See 2 more Smart Citations

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

Meng

Sheng

Cheng³

et al. 2021

Mechanics & Industry

View full text Add to dashboard Cite

A non-Newtonian thermal elastohydrodynamic lubrication (TEHL) model for the elliptic contact is established, into which the inertia forces of the lubricant is incorporated. In doing so, the film pressure and film temperature are solved using the associated equations. Meanwhile, the elastic deformation is calculated with the discrete convolution and fast Fourier transform (DC-FFT) method. A film thickness experiment is conducted to validate the TEHL model considering the inertia forces. Further, effects of the inertia forces on the TEHL performances are studied at different operation conditions. The results show that when the inertia forces are considered, the central and minimum film thicknesses increase and film temperature near the inlet increases obviously. Moreover, the inertial solution of the central film thickness is closer to the experimental result compared with its inertialess value.

show abstract

Section: At Varied Slide-roll Ratiosupporting

confidence: 87%

“…Besides, the detailed expressions of r=h ð Þ e , h e , h 0 e , r e , r 0 e and r 00 e are given by Yang and Wen [20,21].…”

Section: Governing Equationsmentioning

confidence: 99%

Section: Solution Schemementioning

confidence: 99%

See 1 more Smart Citation

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

Meng

Sheng

Cheng³

et al. 2021

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

“…The multigrid method utilised the W ‐cycle, and the steps involved in obtaining a converged solution are reported elsewhere 32 . The elastic deformation was calculated using the multilevel multi‐integration method 32 . Six levels of grids were used for the calculation of the pressure and film thickness.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the oil film stiffness was calculated based on the dynamic load and the centre oil film thickness, and the values obtained by the above two methods were compared:

k_{c} = \frac{\partial F_{p}}{\partial h_{c}} = \frac{\partial F_{g}}{\partial h_{c}}

where h c is the centre oil film thickness 32 . The position of h c is displayed in Figure 3:

h_{c} = 11.9 α^{0.4} {(η_{0} U)}^{0.74} E^{' - 0.14} R^{0.46} W^{- 0.13}

…”

Section: The Model Of Ehlmentioning

confidence: 99%

Analysis of lubricating performance for involute spur gear under vibration

Jian

Wang

Zhang

et al. 2020

Lubrication Science

View full text Add to dashboard Cite

In order to investigate the dynamic characteristics of an oil film under vibration, the dynamic model of an involute gear system was established based on the dynamics theory. The vibration and lubrication characteristics of the gear system were analysed in detail. Furthermore, based on the numerical solution of lubrication, a model of oil film stiffness was established. The dynamic characteristics of the oil film were verified by calculating the oil film stiffness. It was found that both oil film pressure and thickness manifested certain dynamic characteristics under vibration. Moreover, the intensities of oscillation amplitude and frequency were different under different loads and rotating speeds. The oil film stiffness gradually decreased and increased, respectively, with the increasing rotating speed and load. Therefore, for a heavy-duty high-speed gear system, the coupling effect of vibration and lubrication should be considered.

show abstract

Transient elastohydrodynamic lubrication analysis of spur gears running-in considering effects of solid particles and surface roughness

Huang

Wang

2016

Industrial Lubrication and Tribology

View full text Add to dashboard Cite

Purpose – This paper aims to investigate the mechanism of spur gears running-in and to solve the lubrication problems of teeth running-in. Design/methodology/approach – The elastohydrodynamic lubrication (EHL) model considering solid particles was established by applying multi-grid and multiple-grid integration methods to the numerical solution. Findings – In the region where debris settle, transient pressure increases sharply, and a noticeable increase in the running-in load causes a remarkable increase in both the centre and maximum pressures and a slight increase in the minimum film thickness. Roughness wavelength makes a considerable difference to the minimum film thickness at double-to-single tooth transient. A considerable increase in rotation velocity can cause a remarkable reduction in both the centre and maximum pressures but an amazing increase in the minimum film thickness. The effects of roughness amplitude on the maximum pressure are considerably distinct. Research limitations/implications – Research on EHL of spur gears in the running-in process considering solid particles, surface roughness and time-variant effect is meaningful to practical gears running-in. Thermal effect can be included in the next study. Practical implications – The analysis results can be applied to predict and improve lubrication performance of the meshing teeth. Social implications – The aim is to reduce gears’ manufacture and running-in costs and improve economic performance. Originality/value – The EHL model that considers solid particles was established. The Reynolds equation was deduced taking the effects of solid particles into account. The EHL of spur gears running-in was investigated considering the time-variant effect, surface roughness, running-in load and rotation speed.

show abstract

Numerical Simulation of Magnetic Fluid Lubrication

Cited by 3 publications

References 11 publications

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

Effect of fluid inertia force on thermal elastohydrodynamic lubrication of elliptic contact

Analysis of lubricating performance for involute spur gear under vibration

Transient elastohydrodynamic lubrication analysis of spur gears running-in considering effects of solid particles and surface roughness

Contact Info

Product

Resources

About