PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 10

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  curvilinear thrust bearing
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Effects of Hindrance Factors on a Squeeze Film of a Porous Bearing Lubricated With a Dehaven Fluid
Walicka A., Walicki E., Jurczak P., Falicki J.
Machine Dynamics Research
|
2018
|
Vol. 42, No. 1
15--33
EN
In the paper the influence of the hindrance factors on the pressure distribution and loadcarrying capacity of a curvilinear thrust porous bearing is discussed. The equations of motion of a pseudo-plastic fluid of DeHaven are used to derive the Reynolds equation. The general considerations on the flow in a bearing clearance were presented. The analytical considerations on the flow in a thin porous layer composed of capillaries were also presented. Two models of the porous region were used, e.g.: capillary tube with constant cross-section and capillary tube with variable cross-section with rectilinear generatrices. Next, using the Morgan-Cameron approximation the modified Reynolds equation was obtained. As a result the formulae expressing pressure distribution and load-carrying capacity were obtained. Thrust radial bearing with a squeeze film of DeHaven fluid was considered as an example.
2
Content available remote Pressure distribution in the hydrostatic thrust bearing lubricated by a generalized second grade lubricant of a power-law type
Walicka A.
International Journal of Applied Mechanics and Engineering
|
2011
|
Vol. 16, no 4
1225-1235
EN
The flow of a generalized second grade lubricant of a power-law type in a clearance of the thrust curvilinear bearing is considered. To solve this problem the boundary layer equations expressed for axially symmetric case in a curvilinear orthogonal coordinate system connected with one of the bearing surfaces by used. The method of averaging inertia and viscoplastic terms is used to find the solution of the boundary layer equations. As a result the formula for pressure distribution is obtained. Examples the lubricant flow in step and spherical hydrostatic bearings are given.
3
Content available remote Pressure distribution in a curvilinear thrust hydrostatic bearing lubricated by a Herschel-Bulkley fluid
Walicka A., Falicki J.
International Journal of Applied Mechanics and Engineering
|
2008
|
Vol. 13, no 2
543-552
EN
The flow of a Herschel-Bulkley fluid in a curvilinear thrust hydrostatic bearing is considered. The bearing is modeled by two curvilinear surfaces with common axis of symmetry. The flow in the bearing clearance is considered with inertia effect. Using the averaged inertia method the closed-form solution to the equations of motion is obtained. A step bearing is discussed as an example.
4
Content available remote Inertia effects in thrust curvilinear hydrostatic bearing lubricated by a Casson fluid
Walicka A., Falicki J.
International Journal of Applied Mechanics and Engineering
|
2008
|
Vol. 13, no 2
553-562
EN
Many lubricants demonstrate non-Newtonian behaviours. Rheological measurements indicate that the flows of these lubricants may by modeled as the flows of a Casson fluid. In this paper theoretical aspects of hydrodynamic lubricantion of a curvilinear thrust bearing lubricated by a Casson fluid are considered. The effects of inertia forces on the pressure distribution are examined by using the method of averaged inertia. As examples step and spherical bearings are discussed.
5
Content available remote Inertia effects in a thrust curvilinear hydrostatic bearing lubricated by a Vočadlo fluid
Walicka A., Falicki J.
International Journal of Applied Mechanics and Engineering
|
2008
|
Vol. 13, no 3
817-828
EN
Many lubricants demonstrate non-Newtonian behaviours. Rheological measurements indicate that some flows of these lubricants may by modelled as the flows of a Vočadlo fluid. In this paper theoretical aspects of hydrostatic lubrication of a curvilinear thrust bearing lubricated by a Vočadlo fluid are considered. The bearing is modeled by two surfaces of revolution having a common axis of symmetry.The effects of inertia of a longitudinal flow of the Vočadlo lubricant on the pressure distribution in a bearing clearance are examined by using the method of averaged inertia. As examples step and spherical bearings are discussed.
6
Content available remote Performance of a thrust bearing lubricated by a Bingham ferromagnetic lubricant
Walicka A., Wilewski B.
International Journal of Applied Mechanics and Engineering
|
2004
|
Vol. 9, no spec.
345-352
EN
The effects of centrifugal inertia forces on the pressure distribution in the curvilinear thrust bearing lubricated by a ferromagnetic viscoplastic lubricant of a Bingham type are examined. The examples of flows in the bearing modelled by and two concentric spheres are considered. The results obtained show that ferrofluid inertia forces and magnetization have significant effects on the pressure distributions and on the load-capacity.
7
Content available remote Inertia effect in the curvilinear thrust bearing lubricated by a power-law ferrofluid
Walicka A., Wilewski B.
International Journal of Applied Mechanics and Engineering
|
2004
|
Vol. 9, no spec.
337-344
EN
The effects of centrifugal inertia forces on the pressure distribution in the curvilinear thrust bearing lubricated by a power-law ferrofluid are examined. The examples of flows in the bearings modelled by two disks and two concentric spheres are considered. The results obtained show that ferrofluid inertia forces and magnetization have significant effects on the pressure distributions.
8
Content available remote Effect of lubricant inertia and wall conductance on the pressure distribution in MHD thrust bearings
Walicki E., Walicka A.
Tribologia
|
2002
|
nr 6
1691-1701
EN
Steady laminar MHD flow of a viscous Newtonian fluid in the bearing clearance modelled by two co-axial surfaces of revolution is considered. To solve this problem the MHD thin layer equations are used and exspressed in the curvilinear orthogonal coordinate system x, ..., y. The influence of wall conductance and inertia of rotating fluid on the flow field is analyzed.
PL
Rozważono ciągły magnetohydrodynamiczny (MHD) przepływ laminarny lepkiej cieczy newtonowskiej w szczelinie łożyska modelowanej przez dwie współosiowe powierzchnie. Przy rozwiązaniu problemu wykorzystano równania dla cienkiej warstwy MHD i wyrażono je w krzywoliniowym układzie współrzędnych x, u, y. Przeprowadzono analizę wpływu przewodności ścianki oraz bezwładności obracającego się płynu na pole przepływu.
9
Pressure distribution in a curvilinear bearing lubricated by viscoelastic fluid of Rivlin-Ericksen
Walicka A., Walicki E.
Applied Mechanics and Engineering
|
1999
|
Vol. 4, no spec.
73-80
EN
A flow of a viscoelastic fluid of Rivlin-Ericksen in a clearance of a thrust curvilinear bearing was considered. The equations of motion in thin layers presented in the orthogonal curvilinear coordinate system were solved by a method of averaged inertia. As a result the formula for pressure distribution was obtained. Examples of a flow between two disks and two concentric spherical surfaces were given.
10
Inertia effects of viscoplastic lubricant in curved squeeze film
Walicki E., Walicka A., Falicki J.
Applied Mechanics and Engineering
|
1999
|
Vol. 4, no spec.
99-108
EN
The influence of inertia effect on the pressure distribution in a curvilinear thrust bearing with a viscoplastic squeeze film is considered. To solve this problem the boundary layer equations are used. The method of integral approaches is applied and the formulae expressing the pressure distribution are obtained. This distribution for Ostwald - de Waele, Bingham and Herschel - Bulkley fluids in the clearance between two disks is discussed in detail. It is found that the pressure increases with an increase of inertia effects and decreases with a decrease of the flow behaviour index N.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.