Results 221 to 230 of about 43,617 (260)

Lubrication at Extreme Pressures with Mineral Oil Films

Journal of Applied Physics, 1951
Intact mineral oil films at average pressures ranging from 86,000 to 215,000 psi and at high rates of shear have been obtained using a bearing consisting of the contact area between crossed axis steel cylinders. Intact films have also been maintained at low rates of shear and lower pressures using a bearing consisting of a sphere in a spherical shell ...
O. H. Clark, W. W. Woods, J. R. White
openaire   +1 more source

Applications of automatic control to pressurized oil film bearings

Wear, 1962
Expressions for the load-carrying capacity, stiffness and damping rate of pressurized oil film bearings are derived and expressed in terms of the variables available to the designer By adding a simple automatic flow valve, operated by pressure feed-back, the pressurized oil film exhibits infinite stiffness to steady normal loads.
J. K. Royle, R. B. Howarth, A. L. Caseley-Hayford   +2 more
openaire   +2 more sources

Rheology of Oil Films at High Contact Pressures

Nature, 1972
WE report here a new approach to studying the shear behaviour of thin films of oil under conditions of elastohydrodynamic lubrication such as arise at points of contact in ball bearings or between gear teeth. During its passage through the contact the oil is rapidly compressed to pressures in the region of 104 bar and then sheared by the sliding motion
K. L. JOHNSON, A. D. ROBERTS
openaire   +1 more source

Fiber Bragg grating based oil film pressure measurement in journal bearings

2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2018
Ye Tian, Quan Chai, Tao Tan
exaly   +2 more sources

Pressurized Oil Squeeze Film Dampers

Journal of Lubrication Technology, 1980
A pressurized oil squeeze film damper supporting a rigid rotor mounted in antifriction bearings is investigated. Orifice and inherent feed inlets are examined, and it is shown that the clearance determines the inlet resistance for a groove or slot. The film stiffness and damping forces are determined as a function of the restrictor coefficient, rotor ...
openaire   +1 more source

Study on Oil Film and Pressure Distribution of Micro-EHL

Journal of Tribology, 1992
Micro-EHL problems of line contact have been solved by Newton-Raphson method. The results are given from the zero roughness amplitude to the value higher than the film thickness in the smooth surface solution. With the increase of the roughness amplitude, cavitations may be found inside the contact region.
Huang Ping, Wen Shizhu
openaire   +1 more source

Measurement of Oil-Film Pressure in Engine Bearings Using a Thin-Film Sensor

Tribology Transactions, 2002
Editor's Note: Anyone who thinks that STLE isn't on the cutting edge of MEMS technology should read this paper. In it, the authors have measured oil pressures which occur in main and connecting rod bearings using vacuum deposited thin film pressure sensors measuring less than a millimeter wide and just a few microns thick. Their careful work shows that
Yuji Mihara, Tsuneo Someya
openaire   +1 more source

Disjoining Pressure and Film Tension in Comb−Graft Copolymer-Stabilized Oil Films

Langmuir, 1999
Thin, supported decane films stabilized with comb−graft copolymers were studied as models of polymeric surfactant stabilized water-in-oil emulsions.
M. R. Anklam, D. A. Saville, R. K. Prud'homme   +2 more
openaire   +1 more source

Embedded Optical Sensor for Oil Film Pressure Measurements in Journal Bearings

Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1, 2008
The oil film pressure is one of the essential functional parameters in journal bearings. Until now, the oil film pressure has been estimated by theoretical calculations, since the measurement of oil film pressure has been a demanding or even unfeasible task in journal bearings, especially in bearings carrying dynamic loads. In this study a new approach
Ronkainen, Helena, Valkonen, Antti, Kapulainen, Markku, Varjus, Simo, Hokkanen, Ari, Stuns, Ingmar, Virtanen, Juha, Martikainen, Juhani   +7 more
openaire   +2 more sources

Pressure Distribution in Squeeze Film Dampers with Oil Hole Feed

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 1994
To improve the damping capability of squeeze film dampers, oil hole feed rather than circumferential groove feed is a practical proposition. However, circular orbit response can no longer be assumed, significantly complicating the design analysis. This paper details a feasible transient solution procedure for such dampers, with particular emphasis on ...
P Y P Chen, E J Hahn
openaire   +1 more source