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Lubricants 2018, 6(1), 22; https://doi.org/10.3390/lubricants6010022

Improvement of Thrust Bearing Calculation Considering the Convectional Heating within the Space between the Pads

1
GE Renewable Energy Hydro (Switzerland), Zentralstrasse 40, 5242 Birr, Switzerland
2
Institute of Tribology and Energy Conversion Machinery, TU Clausthal, Leibnizstrasse 32, 38678 Clausthal-Zellerfeld, Germany
3
Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland
*
Author to whom correspondence should be addressed.
Received: 14 August 2017 / Revised: 29 January 2018 / Accepted: 10 February 2018 / Published: 26 February 2018
(This article belongs to the Special Issue Friction and Lubrication of Sliding Bearings)
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Abstract

A modern thrust bearing tool is used to estimate the behavior of tilting pad thrust bearings not only in the oil film between pad and rotating collar, but also in the space between the pads. The oil flow in the space significantly influences the oil film inlet temperature and the heating of pad and collar. For that reason, it is necessary to define an oil mixing model for the space between the pads. In the bearing tool, the solutions of the Reynolds equation including a cavitation model, the energy equation and the heat transfer equation are done iteratively with the finite volume method by considering a constant flow rate. Both effects—laminar/turbulent flow and centrifugal force—are considered. The calculation results are compared with measurements done for a flooded thrust bearing with nominal eight tilting pads with an outer diameter of 180 mm. The heat convection coefficients for the pad surfaces mainly influence the pad temperature field and are adjusted to the measurement results. In the following paper, the calculation results for variable space distances, influence of different parameters on the bearing behavior and operating condition at high load are presented. View Full-Text
Keywords: hydrodynamic bearing; thrust bearing calculation; thrust bearing test rig; thrust tilting pad hydrodynamic bearing; thrust bearing calculation; thrust bearing test rig; thrust tilting pad
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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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Chmielowiec-Jablczyk, M.; Schubert, A.; Kraft, C.; Schwarze, H.; Wodtke, M.; Wasilczuk, M. Improvement of Thrust Bearing Calculation Considering the Convectional Heating within the Space between the Pads. Lubricants 2018, 6, 22.

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