Results 81 to 90 of about 137 (128)
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Effect of surface waviness on the static performance of aerostatic journal bearings
Tribology International, 2016Abstract A numerical study of the effect of the bearing surface waviness on the performance of aerostatic journal bearings is presented. The finite difference method (FDM) and an iterative procedure are proposed to solve Reynolds equation and derive the air film pressure distribution.
Baorui Wang +2 more
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Precision Engineering, 2010
Abstract The stiffness of various geometric designs of aerostatic journal bearings for high-speed spindles was investigated under different operating conditions. First, the stiffness of the front and rear journal bearings was evaluated experimentally using the relationship of force and displacement at different supply pressures (6–9 bar). A numerical
Y S Chen
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Abstract The stiffness of various geometric designs of aerostatic journal bearings for high-speed spindles was investigated under different operating conditions. First, the stiffness of the front and rear journal bearings was evaluated experimentally using the relationship of force and displacement at different supply pressures (6–9 bar). A numerical
Y S Chen
exaly +2 more sources
Static performance of the aerostatic journal bearing with grooves
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2019Aerostatic bearings are widely employed in precision machines due to their properties of low friction, low heat conduction, and long-life operation. In this work, static performance of the journal bearing with rectangular grooves is investigated numerically. The effect of geometrical parameters such as axial groove length [Formula:
Xinglong Chen, James K Mills, Gang Bao
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Analysis of the Dynamic Characteristics of the Aerostatic Journal Bearings
Applied Mechanics and Materials, 2014This paper investigates the dynamic characteristics of the aerostatic journal bearing, the rotation center of which is not the center of the journal length. The Finite Difference Method (FDM) and the perturbation method are employed to calculate the stiffness and damping coefficients.
Chun Dong Xu +2 more
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Investigation on backflow phenomenon in the aerostatic journal bearing
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2019In this work, the backflow phenomenon exhibited in the gas journal bearings is investigated. The effect of operational parameters such as eccentricity ratio ɛ, axial velocity of the bearing v z , misalignment angles [Formula: see text] and [Formula: see text] on the backflow behavior, and ...
Xinglong Chen, Gang Bao, James K Mills
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On the modelling of hybrid aerostatic-gas journal bearings
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2011Gas journal bearings have been increasingly adopted in modern turbo-machinery applications as they meet the demands of operation at high rotational speeds, in clean environment, and with great efficiency. Due to the fact that gaseous lubricants, typically air, have much lower viscosity than more conventional oils, carrying capacity and dynamic ...
S Morosi, I F Santos
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Numerical investigation of the performance of aerostatic journal bearings
SPIE Proceedings, 2016The current study presents a detailed theoretical analysis on the performance of aerostatic journal bearings. The dimensionless Reynolds equation is derived and discretized by the finite difference method. An iterative procedure is adopted to get the air film pressure distribution.
Xinkuan Wang +4 more
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Effect of manufacturing errors on the performance of aerostatic journal bearings
Wear, 1981Abstract The results of a theoretical analysis of the effect of manufacturing errors on the performance of aerostatic journal bearings is reported. Investigations carried out to study the influence of (a) geometrical form errors such as ovality, lobing and cylindricity and (b) roughness patterns such as one-dimensional longitudinal roughness and two ...
PANDE, SS, SOMASUNDARAM, S
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Designing the Partially Porous Journal Bearings of an Aerostatic Spindle
Applied Mechanics and Materials, 2017The aerostatic journal bearings are widely used in ultra-precision machine tools. Due to remarkable ability of the porous medium in flow restriction, the porous aerostatic journal bearings are better than other types of aerostatic bearings in load carrying capacity, stiffness, damping and dynamic stability.
Te Yen Huang +2 more
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Analysis of tapered-land hybrid aerostatic journal bearings
Wear, 1982Abstract Results of the analysis of hybrid (aerostatic and aerodynamic) taperedland ournal bearings are presented. For a known bearing geometry, the Reynolds equation is reduced to a set of partial differential equations by using a first-order perturbation method. These differential equations are solved by a finite-difference numerical technique. The
PANDE, SS, SOMASUNDARAM, S
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