Bearing chamber pressurization system for a machine
US4497172A · kind A · utility
41Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1982 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Nov 30, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/23
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A bearing chamber pressurization system for a ducted fan gas turbine engine uses fan delivery air at relatively low pressure and temperature for bearing chamber pressurization. In order to avoid the possibility of a flow reversal in the pressurization air when the fan speed is reduced, a second higher pressure air supply from the core engine is made available under the control of a valve and pressure sensing device, and which comes into operation when the ratio of the bearing chamber pressure and the supply pressure reaches a pre-determined minimum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.