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Prediction of the oil injection time of the FDBs in the HDD spindle motor with tied shaft by utilizing the kirchhoff's pressure law

Title
Prediction of the oil injection time of the FDBs in the HDD spindle motor with tied shaft by utilizing the kirchhoff's pressure law
Author
장건희
Issue Date
2015-06
Publisher
SPRINGER
Citation
Microsystem Technologies, June 2016, Volume 22, Issue 6, pp 1241–1247
Abstract
We propose a method to predict the oil injection time of fluid dynamic bearings (FDBs) with a tied shaft by applying Kirchhoff's pressure law. Since the oil is injected by capillary phenomenon, the volume flow rate can be calculated by utilizing Kirchhoff's pressure law. Then, we calculated the oil injection time of the FDBs with a tied shaft by dividing the volume flow rate by the clearance volumes of the journal bearing, the thrust bearing, and the recirculation channel (RC), respectively. We generated simulation models of the FDBs used in a 2.5aEuro(3) HDD spindle motor with a tied shaft. The total oil injection times of the FDBs with and without a RC were 0.302 and 0.335 s, respectively. Also, we verified the proposed method by measuring the oil injection time of FDBs with a RC. We applied the proposed method to predict and improve the oil injection time of the FDBs with a tied shaft due to the variation of major parameters affecting the oil injection time.
URI
http://link.springer.com/article/10.1007%2Fs00542-016-2840-4http://hdl.handle.net/20.500.11754/25589
ISSN
0946-7076; 1432-1858
DOI
10.1007/s00542-016-2840-4
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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