초록 ▼

The de-icing device is intended for the vane (10) of the inlet guide wheel (4) of a turbojet (2), comprising a fixed part (12) arranged on the upstream side and a mobile flap (18) arranged on the downstream side, in which said fixed part ( 12) comprises a trailing edge (16) substantially in the shap

The de-icing device is intended for the vane (10) of the inlet guide wheel (4) of a turbojet (2), comprising a fixed part (12) arranged on the upstream side and a mobile flap (18) arranged on the downstream side, in which said fixed part ( 12) comprises a trailing edge (16) substantially in the shape of a "U", with one of the branches (162) being located on the intrados side (I) and the other branch (164) being located on the extrados side (E). It comprises at least one emission window (202), oriented substantially along an upstream-downstream direction, and arranged along the branch (162) of the "U" located on the intrados side (I) of the trailing edge (16). The inlet guide wheel (4) vane (10) is equipped with at least such a de-icing device. The aircraft engine (2) comprises at least one vane (10) equipped with such a de-icing device.

대표청구항 ▼

The invention claimed is: 1. A de-icing device for a vane (10) of an inlet guide wheel (4) of a turbojet (2), said vane (10) comprising a fixed part (12) arranged on the upstream side and an associated mobile flap (18) arranged on the downstream side, and said fixed part (12) comprising a hollow bo

The invention claimed is: 1. A de-icing device for a vane (10) of an inlet guide wheel (4) of a turbojet (2), said vane (10) comprising a fixed part (12) arranged on the upstream side and an associated mobile flap (18) arranged on the downstream side, and said fixed part (12) comprising a hollow body ( 13) and a trailing edge (16), for which the profile is substantially in the shape of a "U", with the branches (162, 164) extending substantially in the downstream direction, one of the branches (162) being located on the intrados side (I) and the other branch (164) being located on the extrados side (E), characterized in that it comprises at least one emission window (202), oriented substantially along an upstream-downstream direction, and arranged only along the branch (162) of the "U" located on the intrados side (I) of the trailing edge (16) of the fixed part (12), said emission window (202) being obtained by putting a ribbed plate (152) into contact with said branch ( 162) of the "U". 2. A de-icing device according to claim 1, characterized in that at least one of the emission windows (202) has a constant and prismatic cross-section. 3. A de-icing device according to claim 1, characterized in that at least one of the emission windows (202) has a constant cross-section inclined upwards. 4. A de-icing device according to claim 1, characterized in that at least one of the emission windows (202) has a constant cross-section inclined downwards. 5. A de-icing device according to claim 1, characterized in that at least one of the emission windows (202) has a variable cross-section. 6. A de-icing device according to claim 5, characterized in that said variable cross-section is in the shape of a fish tail. 7. A de-icing device according to claim 1, characterized in that when a branch (162) of the "U" forming the trailing edge ( 16) of the fixed part (12) comprises at least two emission windows (202), said emission windows (202) are uniformly distributed along said branch (162). 8. A de-icing device according to claim 1, characterized in that said ribbed plate (152) is obtained by cutting and stamping operations from a flat plate. 9. A de-icing device according to claim 1, said mobile flap (18) being capable of pivoting about a substantially radial direction (22) starting from a central hub (8) through a central pivot (24) and a peripheral pivot (26), characterized in that it also comprises through perforations (206), substantially along an upstream-downstream direction, the bottom ( 15) of the "U" forming the trailing edge (16) of the fixed part (12), said perforations (206) being located at least in a zone (156, 158) located substantially facing one of said pivots (24, 26), during operation. 10. A de-icing device according to claim 1, characterized in that it also comprises means (300, 400) of conveying hot air to a casing (6) of the inlet guide wheel (4) from a compression stage (920) on the downstream side of said inlet guide wheel (4). 11. A de-icing device according to claim 10, characterized in that said hot air conveyance means (300, 400) comprise a collector (300), arranged circumferentially around said casing ( 6). 12. A de-icing device according to claim 11, characterized in that said hot air conveyance means (300, 400) also comprise at least one conveyance duct (400) that connects said compression stage (920) to said collector (300). 13. A vane (10) of an inlet guide wheel (4) of a turbojet (2), of the type comprising a fixed part (12) and a mobile flap (18) capable of pivoting about a substantially radial direction (22) starting from a central hub (8), characterized in that it is provided with a de-icing device according to claim 1. 14. An aircraft engine (2), characterized in that it comprises an inlet guide wheel (4) equipped with vanes (10) according to claim 13. 15. An aircraft engine (2), characterized in that it comprises at least one de-icing device according to claim 1. 16. A de-icing device for a vane (10) of an inlet guide wheel (4) of a turbojet (2), said vane (10) comprising a fixed part (12) arranged on the upstream side and an associated mobile flap (18) arranged on the downstream side, and said fixed part (12) comprising a hollow body ( 13) and a trailing edge (16), for which the profile is substantially in the shape of a "U", with the branches (162, 164) extending substantially in the downstream direction, one of the branches (162) being located on the intrados side (I) and the other branch (164) being located on the extrados side (E), characterized in that it comprises at least one emission window (202), oriented substantially along an upstream-downstream direction, and arranged along the branch (162) of the "U" located on the intrados side (I) of the trailing edge (16) of the fixed part (12), said emission window (202) being obtained by putting a ribbed plate (152) into contact with said branch ( 162) of the "U", and in that it also comprises at least one emission window (204) oriented substantially along an upstream-downstream direction, and arranged along the branch (164) of the "U" located on the extrados side (E) of the trailing edge (16) of the fixed part (12), said emission window (204) being obtained by putting a ribbed plate (154) into contact with said branch ( 164) of the "U". 17. A de-icing device according to claim 16, characterized in that at least one of the emission windows (202, 204) has a constant and prismatic cross-section. 18. A de-icing device according to claim 16, characterized in that at least one of the emission windows (202, 204) has a constant cross-section inclined upwards. 19. A de-icing device according to claim 16, characterized in that at least one of the emission windows (202, 204) has a constant cross-section inclined downwards. 20. A de-icing device according to claim 16, characterized in that at least one of the emission windows (202, 204) has a variable cross-section. 21. A de-icing device according to claim 20, characterized in that said variable cross-section is in the shape of a fish tail. 22. A de-icing device according to claim 16, characterized in that when a branch (162, 164) of the "U" forming the trailing edge (16) of the fixed part (12) comprises at least two emission windows (202, 204), said emission windows (202, 204) are uniformly distributed along said branch (162, 164). 23. A de-icing device according to claim 16, characterized in that said ribbed plate (152, 153) is obtained by cutting and stamping operations from a flat plate. 24. A de-icing device according to claim 16, said mobile flap (18) being capable of pivoting about a substantially radial direction (22) starting from a central hub (8) through a central pivot (24) and a peripheral pivot (26), characterized in that it also comprises through perforations (206), substantially along an upstream-downstream direction, the bottom ( 15) of the "U" forming the trailing edge (16) of the fixed part (12), said perforations (206) being located at least in a zone (156, 158) located substantially facing one of said pivots (24, 26), during operation. 25. A de-icing device according to claim 16, characterized in that it also comprises means (300, 400) of conveying hot air to a casing (6) of the inlet guide wheel (4) from a compression stage (920) on the downstream side of said inlet guide wheel (4). 26. A de-icing device according to claim 25, characterized in that said hot air conveyance means (300, 400) comprise a collector (300), arranged circumferentially around said casing ( 6). 27. A de-icing device according to claim 26, characterized in that said hot air conveyance means (300, 400) also comprise at least one conveyance duct (400) that connects said compression stage (920) to said collector (300). 28. A De-icing device according to claim 16, characterized in that the emission window(s) (202) located on the intrados side (I) and the emission window(s) (204) located on the extrados side (E) are arranged facing each other. 29. A de-icing device according to claim 16, characterized in that the emission window(s) (202) located on the intrados side (I) and the emission window(s) (204) located on the extrados side (E) are staggered from each other. 30. A vane (10) of an inlet guide wheel (4) of a turbojet (2), of the type comprising a fixed part (12) and a mobile flap (18) capable of pivoting about a substantially radial direction (22) starting from a central hub (8), characterized in that it is provided with a de-icing device according to claim 16. 31. An aircraft engine (2), characterized in that it comprises an inlet guide wheel (4) equipped with vanes (10) according to claim 30. 32. An aircraft engine (2), characterized in that it comprises at least one de-icing device according to claim 16.