| 发明名称 | System of compact contra-rotating propellers | ||
| 摘要 | A system of contra-rotating propellers for an aircraft jet engine, including: a free power turbine; a first and second propeller, contra-rotating, the first propeller being placed in a predetermined direction relative to the second propeller, each including a hub, an outer ferrule, and coupling arms linking the two; and a casing inserted between the free turbine and the propellers, the propellers arranged in the predetermined direction relative to the casing and the free turbine arranged in the opposite direction relative to the casing, the casing including a casing extension in the given direction, rotatably supporting the hub of the propeller. The coupling arms extend in the opposite direction, radially towards the outside. | ||
| 申请公布号 | US9057326(B2) | 申请公布日期 | 2015.06.16 |
| 申请号 | US201013148404 | 申请日期 | 2010.02.11 |
| 申请人 | SNECMA | 发明人 | Charier Gilles Alain;Gallet Francois |
| 分类号 | F02C3/067;F01D1/24;F04D19/02;F02C7/36;F02K3/072 | 主分类号 | F02C3/067 |
| 代理机构 | Oblon, McClelland, Maier & Neustadt, L.L.P. | 代理人 | Oblon, McClelland, Maier & Neustadt, L.L.P. |
| 主权项 | 1. A system of contra-rotating propellers for an aircraft jet engine, comprising: a power free turbine; a first propeller and a second propeller, contra-rotating configured to be rotated around a longitudinal axis of the system of propellers, the first propeller being placed in a downstream direction relative to the second propeller, each of the first and second propellers comprising a hub centered on the longitudinal axis, an outer ferrule being arranged concentrically thereto and participating in an outward radial definition of a main annular tunnel, and coupling arms linking the outer ferrule to the hub; a mechanical transmission device driven by the power free turbine and driving the first and second propellers; and a casing inserted between the power free turbine and the first and second propellers, the first and second propellers being arranged in the downstream direction relative to the casing and the power free turbine being arranged in an upstream direction relative to the casing, the casing including a casing extension extending in the downstream direction, the casing extension rotatably supporting the hub of at least one of the propellers, wherein the coupling arms of the second propeller extend in the upstream direction and radially outward. | ||
| 地址 | Paris FR | ||