Connection device for making a connection between a turbomachine nozzle and a feed enclosure for feeding cooling fluid to injectors
View Patent ↗A connection device between a nozzle and a feed enclosure for feeding cooling fluid to at least one injector in a turbomachine, the device comprises at least one bushing having open axial ends engaged in orifices in a wall of the nozzle and in a wall of the feed enclosure, together with retaining means for retaining the bushing axially, the retaining means being formed to project from an outer cylindrical surface of the bushing between the axial ends of the bushing and at a distance from said ends.
1. A connection device between a nozzle and a feed enclosure for feeding at least one cooling fluid injector in a turbomachine, the device comprising at least one bushing slidably mounted via its open axial ends in orifices in a wall of the nozzle and in a wall of the feed enclosure, and also retaining means for retaining the bushing axially, said retaining means comprising an outer annular collar projecting from a cylindrical outer surface of the bushing between the axial ends of the bushing and at a distance from said ends, wherein the bushing is made up of two tubular elements each having an annular rim at one end, the two annular rims being pressed one against the other and being united to form said outer annular collar of the bushing.
2. A connection device according to claim 1 , wherein the outer annular collar is of radial size that is greater than a radial size of the orifices in which the ends of the bushing are engaged.
3. A connection device according to claim 1 , wherein the bushing is obtained by mechanical deformation or machining.
4. A connection device according to claim 1 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially inside the nozzle.
5. A connection device according to claim 4 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially outside the nozzle, and wherein the bushings disposed radially outside and radially inside the nozzle are identical.
6. A connection device according to claim 4 , wherein an elastic sealing gasket of annular shape is mounted in the feed enclosure between the edge of the orifice feeding the bushing and a rear or downstream plate.
7. A connection device according to claim 1 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially outside the nozzle.
8. A connection device according to claim 7 , wherein the bushing is engaged in an intermediate bushing fixed in an orifice formed in a wall of the feed enclosure, said intermediate bushing being shaped in such a manner as to be capable of being put into place and/or removed after the bushing has been put into place.
9. A connection device according to claim 1 , wherein the end of each bushing opening out into the feed enclosure is far enough away from the wall of the enclosure to avoid increasing head losses in the fluid passing via the bushing.
10. A connection device between a nozzle and a feed enclosure for feeding at least one cooling fluid injector in a turbomachine, the device comprising at least one bushing slidably mounted via its open axial ends in orifices in a wall of the nozzle and in a wall of the feed enclosure, and also retaining means for retaining the bushing axially, said retaining means comprising an outer annular collar projecting from a cylindrical outer surface of the bushing between the axial ends of the bushing and at a distance from said ends,
wherein the bushing comprises a tubular element having an annular washer fitted thereon and secured thereto to form said outer annular collar, the bushing being mechanically deformed to engage material from the bushing in an annular groove formed in a cylindrical inside surface of the washer.
11. A connection device according to claim 10 , wherein the outer annular collar is of a radial size that is greater than a radial size of the orifices in which the ends of the bushing are engaged.
12. A connection device according to claim 10 , wherein the bushing is obtained by mechanical deformation or machining.
13. A connection device according to claim 10 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially inside the nozzle.
14. A connection device according to claim 13 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially outside the nozzle, and wherein the bushings disposed radially outside and radially inside the nozzle are identical.
15. A connection device according to claim 13 , wherein an elastic sealing gasket of annular shape is mounted in the feed enclosure between the edge of the orifice feeding the bushing and a rear or downstream plate.
16. A connection device according to claim 10 , wherein the bushing establishes communication between the nozzle and a feed enclosure disposed radially outside the nozzle.
17. A connection device according to claim 16 , wherein the bushing is engaged in an intermediate bushing fixed in an orifice formed in a wall of the feed enclosure, said intermediate bushing being shaped in such a manner as to be capable of being put into place and/or removed after the bushing has been put into place.
18. A connection device according to claim 10 , wherein the end of each bushing opening out into the feed enclosure is far enough away from the wall of the enclosure to avoid increasing head losses in the fluid passing via the bushing.
19. A connection device according to claim 10 , wherein, in an axial direction, a gap is present between the annular collar and an adjacent surface such that the bushing is permitted to slide in the axial direction by a limited amount with respect to the nozzle and feed enclosure.
20. A connection device according to claim 10 , wherein the annular washer includes a chamfer on one side.