Innovative Passive Magnetic Thrust Bearings for High-Speed Turbomachinery

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$749,696.00
Award Year:
2011
Program:
STTR
Phase:
Phase II
Contract:
N00014-11-C-0470
Agency Tracking Number:
N10A-037-0752
Solicitation Year:
2010
Solicitation Topic Code:
N10A-T037
Solicitation Number:
2010.A
Small Business Information
Mainstream Engineering Corporation
200 Yellow Place, Pines Industrial Center, Rockledge, FL, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
175302579
Principal Investigator:
Thomas Lasko
PI/Mechanical Engineer
(321) 631-3550
tml@mainstream-engr.com
Business Contact:
Michael Rizzo
CFO
(321) 631-3550
mar@mainstream-engr.com
Research Institution:
University of Colorado at Boulder
Ryan Starkey
ECOT 634 Engineering Center
Campus Box 429
Colorado, CO, 80309-
(303) 735-4900
Nonprofit college or university
Abstract
In miniature gas turbines for UAV applications, traditional bearings exhibit a typical lifetime of only 25 hours due to excessive axial loading. Mainstream proposed a passive permanent magnet thrust bearing to alleviate this problem and increase service life to over 1000 hours. Since this type of bearing is non-contacting, it can operate at very high rotational speeds with minimal heat generation and extended operating life. Mainstream"s Phase I design highlighted the advantages of using passive magnetic bearings for this application: Non-contact operation Sufficient force capacity Sufficient stiffness to maintain axial tolerance Size similar to traditional bearings These advantages have been shown through both simulation and static testing. The tests of the prototype demonstrated a 201 N load capacity, meeting the project goals. The remaining tests in Phase II will show how these bearings perform at high rotational speeds and in a gas turbine environment. Upon the conclusion of Phase II, passive magnetic bearings will prove to be a viable solution for UAV miniature turbines and other military and commercial applications.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government