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Title: Comparative performance of squeeze film air journal bearings made of aluminium and copper
Authors: Wang, C
Keywords: single-layer piezoelectric actuator;squeeze film bearing;Reynolds equation;pressure leakage;mode shape;Al bearing and Cu bearing
Issue Date: 3-May-2012
Publisher: Springer-Verlag
Citation: International Journal of Advanced Manufacturing Technology, 2013, 65, pp. 57-66
Abstract: Two tubular squeeze film journal bearings, made from Al 2024 T3 and Cu C101, were excited by driving the single-layer piezoelectric actuators at a 75-V AC with a 75-V DC offset. The input excitation frequencies were coincident with the 13th modal frequency, at 16.32 and 12.18 kHz for the respective Al and Cu bearings, in order to produce a ‘triangular’ modal shape. The paper also provided a CFX model, used to solve the Reynolds equation and the equation of motion, to explain the squeeze film effect of an oscillating plate with pressure end leakage. The dynamic characteristics of both bearings were studied in ANSYS and then validated by experiments with respect to their squeeze film thickness and load-carrying capacity. It was observed that whilst both bearings did levitate a load when excited at mode 13, the Al bearing showed a better floating performance than Cu bearing. This is due to the fact that the Al bearing had a higher modal frequency and a greater amplitude response than the Cu bearing.
Description: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Copyright @ 2012 The Authors - The article can be accessed from the links below.
This article has been made available through the Brunel Open Access Publishing Fund.
ISSN: 0268-3768
Appears in Collections:Publications
Brunel OA Publishing Fund
Advanced Manufacturing and Enterprise Engineering (AMEE)

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