Results 211 to 220 of about 3,089 (261)
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On the Lubricating Mechanism of Roller Skew in Cylindrical Roller Bearings
Tribology Transactions, 2013Skewing is the motion of a roller as it turns about an axis normal to the roller–race interface in cylindrical roller bearings. With a special coordinate transformation technique, complete numerical solutions for the finite line elastohydrodynamic lubrication (EHL) contact formed between a roller and races were obtained to investigate the lubricating ...
Xiaoling Liu, Peiran Yang
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Electron beam lithography on cylindrical roller
Microelectronic Engineering, 2010We developed a nano-structure fabrication technology over a cylindrical roller using electron beam lithography (EBL) and a specimen rotation apparatus. The high-resolution patterning is done on a cylindrical roller specimen and it is achieved by controlling the thickness of photo-resistance (PR) and dosage of the electron beam (EB).
Shih Chun Tseng +4 more
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An Experimental Investigation of Cylindrical Roller Bearings Having Annular Rollers
Journal of Lubrication Technology, 1976This study deals with an experimental investigation of a cylindrical roller bearing having annular rollers. Comparisons are made with a solid roller bearing having the same configuration and dimensions. Radial deformations and load distribution between rollers are measured under static load and compared with numerical solutions.
A. Suzuki, A. Seireg
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Geometry design and machining of roller gear cams with cylindrical rollers
Mechanism and Machine Theory, 1994Abstract This paper derives equations for the surface geometry of roller gear cams with cylindrical rollers based on coordinate transformation, differential geometry, and theory of conjugate surfaces. Mathematical expressions for the principal curvatures and directions and the pressure angles are also presented.
Hong-Sen Yan, Hsin-Hung Chen
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An Analytical Investigation of Cylindrical Roller Bearings Having Annular Rollers
A S L E Transactions, 1967Cylindrical roller bearings with annular rollers may be advantageous in applications where weight, lubrication, and speed are major considerations in the operation of the bearing. This discussion describes an analytical technique whereby the effects of the elastic and Hertzian distortions of the hollow rollers are considered in the determination of the
T. A. Harris, S. F. Aaronson
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Effect of Varying the Number of Rollers on Dynamics of a Cylindrical Roller Bearing
Volume 8: 26th Conference on Mechanical Vibration and Noise, 2014In present paper, nonlinear dynamic model has been developed for cylindrical roller bearings. The Hertzian contact theory is used to derive a two degree of freedom model which considers nonlinearity due to clearance. The nonlinear dynamic behaviour of cylindrical roller bearing has been studied with varying number of rollers supporting load.
Aditya Sharma, M. Amarnath, P. K. Kankar
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Tribology International, 2022
Abstract A new model for cylindrical roller bearings, capable of deterministically handling lubrication and misalignment situations, is developed by coupling a quasi-static model and a finite line-contact EHL solver. Numerical results of internal load, pressure, and film thickness between rollers and raceways as well as bearing stiffness are obtained
Liangwei Qiu +3 more
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Abstract A new model for cylindrical roller bearings, capable of deterministically handling lubrication and misalignment situations, is developed by coupling a quasi-static model and a finite line-contact EHL solver. Numerical results of internal load, pressure, and film thickness between rollers and raceways as well as bearing stiffness are obtained
Liangwei Qiu +3 more
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Misalignment Effects in Cylindrical Roller Bearings
Applied Mechanics and Materials, 2014All cylindrical-rollers profiles exhibit severe discontinuities in the end chamfer zones; the ZB profile includes two more at the common points of the crowned radius and straight line, Fig. 1.
Marcelin Benchea +2 more
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Cage Instabilities in Cylindrical Roller Bearings
Journal of Tribology, 2004A six-degree-of-freedom model was developed and used to simulate the motion of all elements in a cylindrical roller bearing. Cage instability has been studied as a function of the roller-race and roller-cage pocket clearances for light-load and high-speed conditions.
Niranjan Ghaisas +2 more
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Lubrication of cylindrical rollers with surface corrugations
Wear, 1972Abstract The paper shows how the wavelength of corrugations on a cylindrical roller strongly influences its hydrodynamic properties. It is further shown how these properties, as the wavelength decreases, tend towards those obtained by the authors' probabilistic roughness theory.
K. Tønder, H. Christensen
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