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Stručni rad

https://doi.org/10.31534/engmod.2024.1.ri.06a

Performance of Multiscale Hydrodynamic Step Bearing with Inhomogeneous Surfaces

Shaojin Shao ; College of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu Province, CHINA
Yongbin Zhang ; College of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu Province, CHINA


Puni tekst: engleski pdf 360 Kb

verzije

str. 77-92

preuzimanja: 0

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Sažetak

In the hydrodynamic step bearing, when the lubricating film thickness is as low as the adsorbed layer thickness on the surface, the adsorbed layer effect on the bearing pressure should be evident. Different interactions can be formed between the fluid and the static surface, in the bearing inlet and outlet zones, respectively. In this paper, the multiscale calculation was made for the pressures generated in this type of step bearing when the continuum film exists between the adsorbed layers. The calculation outcomes show that the hydrodynamic pressures and loads of the bearing for the S(strong)-M(medium)-S(strong) and S(strong)-W(weak)-S(strong) fluid-bearing surface interaction types exceed significantly those for the S(strong)-S(strong)-S(strong) fluid-bearing surface interaction type if the bearing clearance in the outlet zone is smaller than 100nm (and over 20nm). The results indicate that for higher hydrodynamic pressures in the bearing, the interaction between the fluid and the static surface in the outlet zone is stronger than that in the inlet zone.

Ključne riječi

adsorbed layer; hydrodynamic pressure; hydrodynamic bearing; inhomogeneous surface; load-carrying capacity; multiscale

Hrčak ID:

317256

URI

https://hrcak.srce.hr/317256

Datum izdavanja:

30.6.2024.

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