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Lubricants 2018, 6(3), 71; https://doi.org/10.3390/lubricants6030071

A Simulation Study for the Design of Membrane Restrictor in an Opposed-Pad Hydrostatic Bearing to Achieve High Static Stiffness

1
Department of Thermal Energy Conversion Technology, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu 31057, Taiwan
2
Department of Power Mechanical Engineering, National Tsing Hua University, 101, Sec. 2, Guang Fu Rd., Hsinchu 30013, Taiwan
*
Author to whom correspondence should be addressed.
Received: 17 July 2018 / Revised: 15 August 2018 / Accepted: 17 August 2018 / Published: 21 August 2018
(This article belongs to the Special Issue Fluid-Film Lubrication)
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Abstract

The effects of a membrane restrictor’s design parameters on the performance of a hydrostatic opposed-pad bearing are presented in this article. Compared to the single-pad bearing, the opposed-pad bearing can perform much better in terms of static stiffness over a wider load range. It is also found that, for small bearing eccentricity, the optimal design restriction ratio of 0.25 still results in high bearing stiffness even if the dimensionless stiffness of membrane is not the optimal value of 1.33. Furthermore, decreasing the ratio of the upper effective area to the lower effective area generally increases the applicable working range of the bearing. Additionally, for high loading demands, the chance for further improvement of bearing performance by employing different design parameter for each pad is examined. Finally, a design procedure for designing the membrane restrictor for an opposed-pad bearing to achieve high static stiffness is given. View Full-Text
Keywords: fluid film bearing; hydrostatic bearing; opposed-pad bearing; membrane restrictor; diaphragm controlled restrictor fluid film bearing; hydrostatic bearing; opposed-pad bearing; membrane restrictor; diaphragm controlled restrictor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Lai, T.-H.; Lin, S.-C. A Simulation Study for the Design of Membrane Restrictor in an Opposed-Pad Hydrostatic Bearing to Achieve High Static Stiffness. Lubricants 2018, 6, 71.

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