Analysis of Static and Dynamic Load on Hydrostatic Bearing with Variable Viscosity and Pressure
TLDR
In this paper, the authors used the Reynolds equation and boundary conditions were changed for various parameters such as temperature distribution, viscosity variation and radial load to design a bearing with high stiffness, damping characteristic and lubrication inertia.Abstract:
Hydrostatic bearing finds wide application in machine tools with various technologies because of their high stiffness and damping characteristic. The environmental conditions, such as low and/or high temperatures, dust and dirt, moisture and unusual mounting conditions, can also affect a bearing's performance adversely. Therefore, both mechanical and environmental factors may affect the choice of a bearing and its performance. For high speed applications it is necessary to have design data including the effect of rotational lubricant inertia.The objective of the study is to design a hydrostatic bearing with following properties such as high stiffness, damping characteristic and lubrication inertia. In the present study Reynolds equation is used and boundary conditions are changed for various parameters such as temperature distribution, viscosity variation and radial load. The simulated results were analyzed in detail and found that increasing the viscosity of hydrostatic thrust bearing under specific conditions when both surfaces are rotated, the wear and tear are minimized and life time has been increased. This will be of great use in high speed applications.read more
Citations
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References
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Journal ArticleDOI
Experimental assessment of hydrostatic thrust bearing performance
TL;DR: In this article, the performance characteristics of hydrostatic thrust bearing were evaluated using a test rig and a specially devised computer program using an iterative technique has been adopted to compute numerically the pressure distribution and predict other performance characteristics.
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Angled Injection—Hydrostatic Bearings Analysis and Comparison to Test Results
Luis San Andrés,Dara W. Childs +1 more
TL;DR: In this paper, a bulk flow model for predicting the static performance and force coefficients of hybrid bearings with angled orifice injection is presented. But the analysis reveals that the fluid momentum exchange at the orifice discharge produces a pressure rise in the hydrostatic recess which retards the shear flow induced by journal rotation, and thus, reduces cross-coupling forces.
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Experimental Versus Theoretical Characteristics of a High-Speed Hybrid (Combination Hydrostatic and Hydrodynamic) Bearing
TL;DR: In this paper, a high speed test facility designed and installed at Texas A&M to study water lubricated journal bearings has been successfully used to test statically an orifice compensated five-recess-hybrid (combination hydrostatic and hydrodynamic) bearing for two radial clearance configurations.
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The combined effects of the centripetal inertia and the surface roughness on the hydrostatic thrust spherical bearings performance
TL;DR: In this article, the surface roughness and the predominant centripetal inertia terms due to the shaft rotation of the externally pressurized thrust spherical bearings are dealt with. But the bearing surfaces are assumed to have randomly distributed roughness, and an optimum design based on minimum power losses, minimum flow rate and optimal restrictor dimensions is theoretically examined.
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Bulk-Flow Analysis of Hybrid Thrust Bearings for Process Fluid Applications
TL;DR: In this article, a bulk-flow analysis for prediction of the static load performance and dynamic force coefficients of high speed, angled injection orifice-compensated, hybrid (hydrostatic/hydrodynamic) thrust bearings is presented.