Bearing cooling arrangement for air cycle machine
US5113670A · kind A · utility
63Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1990 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Aug 3, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In air cycle machines with hydrodynamic bearings, the mass flow rate of coolant (36) passing through a series of bearings (32, 28, 30) is metered before the coolant passes through the final bearing (30). The final bearing operates at an internal pressure equivalent to that present in the region (72) into which coolant exhausts after exiting the final bearing. Since coolant in the final bearing is at the same pressure as air immediately downstream from the bearing, no rotating seal is required at the outlet of the bearing cooling flowpath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.