Optimization of the bearing surface of the sliding bearing according to the bearing capacity parameter taking into account the dependence of the lubricant viscosity on pressure and temperature

2018 ◽  
pp. 66-72
Author(s):  
D. Hasianova ◽  
◽  
M. Mukutadze ◽  
Keyword(s):  
Bearing Capacity ◽  
Bearing Surface ◽  
Sliding Bearing ◽  
Lubricant Viscosity

Bearing profile of sliding tribological systems

2021 ◽  
pp. 53-56
Author(s):  
Keyword(s):  
Hydrodynamic Lubrication ◽  
Surface Profile ◽  
Experimental Methods ◽  
Hydrodynamic Characteristics ◽  
Bearing Surface ◽  
Tabular Data ◽  
Sliding Bearing ◽  
Friction Process ◽  
Operational Characteristics ◽  
Wide Range

The main contours of the bearing surfaces of friction pairs with hydrodynamic lubrication are considered. Analysis of tabular data and graphs obtained by experimental methods made it possible to establish additional parameters of influence on the hydrodynamic characteristics of the friction process and the operational characteristics of tribological systems, in a wide range of load-speed modes. Keywords: sliding bearing, hydrodynamics, bushing, bearing surface, profile, circle, ellipse, wavy contour, wear. [email protected]

scholarly journals Applications of the Theory of Continuous Oil Film Lubrication of a Radial Sliding Bearing for Three Combined Conditions

2016 ◽  
Vol 8 (2) ◽  
pp. 22
Author(s):  
Jingyuan Li ◽  
Zifeng Li
Keyword(s):  
Bearing Capacity ◽  
Rotation Speed ◽  
Rotating Shaft ◽  
Sliding Bearing ◽  
Load Bearing ◽  
Sleeve Bearing ◽  
Oil Film ◽  
Neck Rotation ◽  
Rotating Load ◽  
Film Lubrication

<p class="1Body">The theory of lubrication of a radial sliding bearing is extended to three cases: the shaft neck rotation and bush rotation bearing, the rotating load bearing, and the floating sleeve bearing. For the bearing with rotating shaft neck and rotating bush, fixing the observer at the bushing can enable the determination, in a simple and more accurate manner, of the bearing capacity of the bearing with the rotating load. As long as a rotating load exists, whirl exists; if the shaft rotation speed is 2 times the load rotation speed, then the eccentricity reaches the maximum.</p>

scholarly journals Computational Model for Radial Plain Bearing with Non-Circular Bearing Surface Profile and Fusible Coating on Shaft Surface

2021 ◽  
Vol 2096 (1) ◽  
pp. 012023
Author(s):  
M A Mukutadze ◽  
M V Novakovich ◽  
N S Zadorozhnaya
Keyword(s):  
Bearing Capacity ◽  
Mechanical Energy ◽  
Surface Profile ◽  
Energy Dissipation Rate ◽  
Flow Equation ◽  
Zero Approximation ◽  
Plain Bearing ◽  
Bearing Surface ◽  
First Approximation ◽  
Friction Parameters

Abstract The paper presents a study based upon: a Newtonian fluid flow equation (“thin layer”), a continuity equation, and an equation of the molten-profile radius for a shaft coated with a fusible metal alloy; considering a mechanical energy dissipation rate formula, the authors produced an asymptotic and accurate automodel solution for the zero approximation (melting ignored) and first approximation (adjusted for melting) of a radial plain bearing featuring a fusible metal coating and a bearing profile adapted to the specific friction parameters. The paper further presents analytical dependencies describing the molten surface radius, velocity and pressure fields for zero and first approximation. Besides, it determines the key operating parameters of the frictional couple, the bearing capacity, and the friction. It also shows how the parameters arising from the melting of the surface affect the bearing capacity and friction where the bearing surface profile is adapted to the specific conditions of friction.

INFLUENCE OF MACRO AND MICRO DEFLECTIONS ON LOADING CAPACITY, FLOW RATE AND ENERGY CHARACTERISTICS OF FLUID FRICTION BEARINGS

2020 ◽  
Vol 6 ◽  
pp. 106-113
Author(s):  
S.V. MAYOROV ◽  
A.V. GORIN ◽  
I.V. RODICHEVA ◽  
I.G. USIKOVA
Keyword(s):  
Mathematical Model ◽  
Bearing Capacity ◽  
Numerical Solution ◽  
Flow Rate ◽  
Reynolds Equation ◽  
Loading Capacity ◽  
Fluid Friction ◽  
Sliding Bearing ◽  
Energy Characteristics ◽  
Friction Bearings

The influence of technological deviations on the performance of fluid friction bearings is considered. A mathematical model of a hydrodynamic sliding bearing is presented, based on a joint numerical solution of the Reynolds equation and additional relations to take into account the microroughness of the bearing surfaces. Analysis of the numerical results made it possible to assess the effect of roughness on the bearing capacity, consumption and energy characteristics of fluid friction bearings.

scholarly journals Elastic deformation of the bearing surface of a radial sliding bearing turbocharger

2013 ◽  
Vol 6 (7(66)) ◽  
pp. 53
Author(s):  
Віктор Іванович Кравцов ◽  
Мирослав Васильович Кіндрачук ◽  
Олександр Леонідович Діденко ◽  
Абады Мехрдад Садегіджалал
Keyword(s):  
Elastic Deformation ◽  
Bearing Surface ◽  
Sliding Bearing

scholarly journals Load Distribution Behaviour of Bored Pile in Various Soil Formation: Rock Socket in Limestone, Schist and Sandstone

2016 ◽  
Vol 77 (2) ◽  
Author(s):  
Fazela Mustafa ◽  
Yasmin Ashaari ◽  
Aminuddin Baki
Keyword(s):  
Bearing Capacity ◽  
Skin Friction ◽  
Load Distribution ◽  
Soil Formation ◽  
Bearing Surface ◽  
Empirical Methods ◽  
Bored Pile ◽  
Different Types ◽  
Very High ◽  
Distribution Behaviour

Rock socketed bored pile is a solution when the load from the structure is very high and/or accessible bearing surface hasan inadequate bearing capacity. The study is based on instrumented bored pile socketing into different types of rock namely.limestone, schist and sandstone at three sites. The result for three (3) test piles namely PTP1, UTP-1 and TP2 shows most of the load are resisted by friction rather than end bearing at the pile working load. The load apportioned to end bearing at higher loads varies for the three test piles. Comparison of observed mobilised skin friction in the rocks with empirical methods indicates that prediction values from Williams and Pells [1] over design for two out of the three test piles and that by Hovarth [2] are under design for two out of the three test piles.

The Effect of Lubricant Viscosity-Temperature Characteristics on the Performance of Plain Journal Bearings

2005 ◽  
Author(s):  
Waldemar M. Dmochowski ◽  
Martin N. Webster
Keyword(s):  
Operating Temperature ◽  
Viscosity Index ◽  
Journal Bearings ◽  
Total Power ◽  
Power Losses ◽  
Bearing Surface ◽  
Temperature Characteristics ◽  
Synthetic Base Stocks ◽  
Lubricant Viscosity ◽  
Bearing Friction

Experimental and analytical results of bearing friction loss, operating temperature, and oil gap thickness are presented comparing performance characteristics of bearings operating with the different lubricants. The lubricants were blended using a variety of mineral and synthetic base stocks to achieve a range of viscosity-temperature characteristics. The results show that the test bearings running with higher viscosity index (VI) lubricants generated slightly lower bearing surface temperatures than those generated using a low VI lubricant. The high VI lubricant also reduced the total power losses by up to 10%. These gains are achieved with little or no change in the minimum oil film thickness.

Heat Effects in Lubricating Films

1944 ◽  
Vol 11 (2) ◽  
pp. A72-A76
Author(s):  
A. C. Hagg
Keyword(s):  
Heat Flow ◽  
Temperature Dependence ◽  
Heat Generation ◽  
Simple Shear ◽  
Shearing Stress ◽  
Bearing Surface ◽  
Oil Film ◽  
Analytical Results ◽  
Heat Effects ◽  
Lubricant Viscosity

Abstract Heat effects in lubricating films are analyzed on the basis of simple shear of the lubricant, Reynolds logarithmic formula relating lubricant viscosity and temperature, and an equation relating the heat generation and heat flow in the film. The film-temperature dependence on velocity is determined, and the result is used to obtain the shearing stress and shearing rates. The formulas thus derived are useful in analyzing the performance of oil-film bearings. Experiments have been carried out with measurement of shaft- and bearing-surface temperatures, as well as friction; the tests support the analytical results. An approximate means for judging the importance of film heating in a given case in terms of velocity and lubricant viscosity is suggested.

Effects of Lubricant Viscosity-Temperature Relationship on the Capacity of Sliding Bearing

2013 ◽  
Vol 365-366 ◽  
pp. 1185-1189
Author(s):  
Xiao Fei Dong ◽  
Bin Lin ◽  
Guan Wei Zhang
Keyword(s):  
Experimental Data ◽  
Bearing Capacity ◽  
High Speed ◽  
Temperature Relationship ◽  
Sliding Bearings ◽  
Maximum Stiffness ◽  
Load Carrying ◽  
Water Based ◽  
Fluent Software ◽  
Lubricant Viscosity

Depending on the experimental data of Water-based lubricant viscosity-temperature relationship, this paper adopts Fluent software to analyze how lubricant viscosity-temperature relationship affects load-carrying properties of hybrid sliding bearings. The results show that lubricants will rise obviously when hybrid sliding bearings are in high speed, which will greatly affect bearing capacity and stiffness of bearings. The maximum stiffness of hybrid sliding bearings appears when the eccentricity is from 0.4 to 0.5. This conclusion is dramatically different from bearing capacity number ignored lubricant viscosity-temperature relationship.

Design and Fabrication of the Lubricating Dimple of the Headface Sliding Bearing with Phyllotactic Pattern

2013 ◽  
Vol 658 ◽  
pp. 367-371 ◽  
Author(s):  
Yu Shan Lu ◽  
Hong Peng Liu
Keyword(s):  
Experimental Results ◽  
Bearing Surface ◽  
Sliding Bearing ◽  
Phyllotactic Pattern ◽  
Uv Lithography ◽  
Analytical Results

In order to improve the lubricating performance of the headface sliding bearing, a new kind of the bionic headface sliding bearing, which has defined lubricating dimple pattern, has been designed based on the phyllotactic theory, and fabricated with UV lithography method and electrolytic technology. A electrolytic experiment of the dimple has been done and analyzed about the influence of the electrolytic time to the electrolytic depth against the different phyllotactic parameters. The analytical results indicate that the phyllotactic parameters influence the lubricating dimple arrangement configuration, so as to improve lubricating performance of the bearing. The increasing diameter of the dimple and the decreasing phyllotactic parameter c can increase the density of the lubricating dimple. Electrolytic experimental results show that the reasonable electrolytic fabricating can reduce the faults of defined lubricating dimple arrangement on the bearing surface.

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