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Barrier Film Between Journal and Axial Bearing

IP.com Disclosure Number: IPCOM000014827D
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2003-Jun-20

Publishing Venue

IBM

Abstract

A typical journal and axial bearing arrangement is shown in the above figure. The journal bearing 1 is pumping oil downward where the axial bearing 2 is pumping oil outward. Oil at corner 3 is pumped away from each other. The pumping strengths of the journal and axial bearings can never be identical due to tolerance and orientation of the spindle. There is a good chance for the oil to be redistributed in each start stop due to the pumping strength difference. Oil starvation in one of them will occur eventually. The solution is to coat the shaft 4 and sleeve 5 at the corner area 3 with barrier film. It will prevent oil be connected. Thus prevents oil redistribution. 1