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Inertia effects in a multilobe conical bearing lubricated with a couple stress fluid

Walicka A., Walicki E., Jurczak P.

International Journal of Applied Mechanics and Engineering

2019

Vol. 24, no. 2

439--451

In this paper, a multilobe conical bearing is analyzed. A lubricant modelled by a couple stress fluid flows In the bearing clearance . The Galerkin method is used to determine the mechanical parameters of multilobe journal bearings. An example of a two-lobe conical bearing is discussed in detail. The inertia of the flowing lubricant is taken into account in the analysis. It has been found that the increase of the couple stress generates an increase the pressure in the clearance.

Mechanical parameters of the curvilinear squeeze film bearing lubricated by a Gecim-Winer fluid

Walicka A., Walicki E.

International Journal of Applied Mechanics and Engineering

2017

Vol. 22, no. 2

465--473

Based upon a Gecim-Winer fluid flow model, a curvilinear squeeze film bearing is considered. The equations of motion are given in a specific coordinates system. After general considerations on the Gecim-Winer fluid flow these equations are used to derive the Reynolds equation. The solution of this equation is obtained by a method of successive approximation. As a result one obtains formulae expressing the pressure distribution and load-carrying capacity. The numerical examples of the Gecim-Winer fluid flow in gaps of two simple bearings: radial and spherical are presented.

Mechanical parameters of the squeeze film curvilinear bearing lubricated with a Prandtl fluid

Walicka A., Walicki E.

International Journal of Applied Mechanics and Engineering

2016

Vol. 21, no. 4

967--978

Based upon a Prandtl fluid flow model, a curvilinear squeeze film bearing is considered. The equations of motion are given in a specific coordinate system. After general considerations on the Prandtl fluid flow these equations are used to derive the Reynolds equation. The solution of this equation is obtained by a method of successive approximation. As a result one obtains formulae expressing the pressure distribution and load-carrying capacity. The numerical examples of the Prandtl fluid flow in gaps of two simple bearings are presented.

Mechanical Parameters for a Multilobe Conical Bearing Lubricated with a Couple-Stress Fluid

Walicka A., Walicki E., Jurczak P., Wojnarowski J.

Machine Dynamics Research

2015

Vol. 39, No. 4

43-54

In this paper a solution to the problem of mechanical parameters of a multilobe journal bearing is presented. The problem is solved by the Galerkin method after assuming that the bearing is lubricated with a couple-stress fluid. An example of a two-lobe bearing is discussed in detail. It was found that the presence of couple-stresses affects considerably an increase in the film pressure.