Reduction gear assembly and a gas turbine engine
US5107676A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Jun 8, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N7/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A turbofan gas turbine engine (10) comprises a fan rotor (32) driven by a core engine (11) via a shaft (36) and a reduction gear (38). A lubricant source (63) is arranged to supply lubricant to the reduction gear (38) to lubricate gear teeth and bearings (52) in the reduction gear (38). An annular collector (76) is positioned coaxially around the reduction gear (38) and is secured to the fan rotor (32) and is driven by the reduction gear (38). The annular collector (76) is arranged to collect lubricant leaving the reduction gear (38) on its inner surface. A number of static scoops (82) collect lubricant from adjacent the inner surface of the annular collector (76) to return the lubricant to valves (86). The valves (86) allow the lubricant to return to the lubricant source (63) in normal operation. If the lubricant source (63) fails to supply lubricant to the reduction gear (38) the valve (86) returns the lubricant to the reduction gear (38) to allow the reduction gear (38) to operate for a period of time without a supply of lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.