Loading...
Please wait, while we are loading the content...
Similar Documents
The chevron foil thrust bearing: improved performance through passive thermal management and effective lubricant mixing
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bruckner, Robert |
| Copyright Year | 2013 |
| Description | An improved foil thrust bearing is described that eliminates or reduces the need for forced cooling of the bearing foils while at the same time improves the load capacity of the bearing, enhances damping, provides overload tolerance, and eliminates the high speed load capacity drop-off that plagues the current state of the art. The performance improvement demonstrated by the chevron foil thrust bearing stems from a novel trailing edge shape that splays the hot lubricant in the thin film radially, thus preventing hot lubricant carry-over into the ensuing bearing sector. Additionally, the chevron shaped trailing edge induces vortical mixing of the hot lubricant with the gas that is naturally resident within the inter-pad region of a foil thrust bearing. The elimination of hot gas carry-over in combination with the enhanced mixing has enabled a completely passive thermally managed foil bearing design. Laboratory testing at NASA has confirmed the original analysis and reduced this concept to practice. |
| File Size | 230791 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20140010151 |
| Archival Resource Key | ark:/13960/t1hj1hs9g |
| Language | English |
| Publisher Date | 2013-09-08 |
| Access Restriction | Open |
| Subject Keyword | Foil Bearing Gas Bearing Thrust Bearing Cooling Lubricants Thrust Bearings Trailing Edges Shapes Temperature Control Reynolds Equation Turbine Engines Foil Bearings Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
