Propeller module for an aero gas turbine engine
US4688995A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1986 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Feb 25, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB64C11/306
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A propeller module for an aero gas turbine engine comprises two contra-rotating propellers driven by a reduction gearbox positioned axially between the propellers. Pitch change mechanisms operated by a pitch change power unit are provided to change the pitch of the propeller blades. The pitch change power unit is positioned in the hub of the second multi-bladed propeller and is remote from the first multi-bladed propeller. The first and second pitch change mechanisms are mounted on the reduction gearbox. The first pitch change mechanism comprises first pitch change gears which are rotatably mounted on a carrier of the reduction gearbox by spindles which extend axially through planet gears of the gearbox. The second pitch change mechanism comprises second pitch change gears rotatably mounted on the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.