Fastening a combustion chamber inside its casing
View Patent ↗A combustion chamber module includes a combustion chamber attached to a casing. The downstream end of the outer wall of the combustion chamber is secured to an annular connection part having fastener tabs directed in an upstream direction, each tab end being engaged in a hook-forming groove of the casing.
1. A combustion chamber module comprising an annular combustion chamber and an outer casing, the combustion chamber being attached to the outer casing, wherein the downstream end of an outer wall of said combustion chamber is secured to an annular connection part that includes a plurality of fastener tabs directed radially outwards and upstream, wherein each portion of each tab is engaged in a hook-forming groove that is laterally open in a downstream direction and that is secured to the inside wall of the casing, wherein each end portion of each tab includes a projection situated at a distance from the end of the tab, said projection being in contact with said radially outermost surface of the groove or the inside surface of said casing, and wherein said fastener tabs are shaped in such a manner that, when cold, clamping is exerted between said projection of each tab and the radially outermost surface of the groove or the inside surface of said casing.
2. A combustion chamber module according to claim 1 , wherein said fastener tabs are regularly distributed circumferentially.
3. A combustion chamber module according to claim 2 , wherein said fastener tabs are eighteen in number.
4. A combustion chamber module according to claim 1 , wherein the inside wall of said casing is provided with a plurality of individualized hook-forming grooves distributed circularly so as to correspond with respective ones of said fastener tabs, each groove receiving the end of one fastener tab.
5. A combustion chamber module according to claim 1 , wherein the inside wall of the casing is provided with a single groove that is continuous and annular, and that has the ends of all of the fastener tabs engaged therein.
6. A combustion chamber module according to claim 5 , wherein the ends of all of the fastener tabs are united by a ring that is engaged in said continuous groove.
7. A turbomachine including a combustion chamber module according to claim 1 .
8. A combustion chamber module according to claim 1 , wherein said projection is in contact with said radially outermost surface of the groove, and wherein said fastener tabs are shaped in such a manner that, when cold, clamping is exerted between said projection of each tab and the radially outermost surface of the groove.
9. A module according to claim 1 , wherein said projection being in contact with the inside surface of said casing, and wherein said fastener tabs are shaped in such a manner that, when cold, clamping is exerted between said projection of each tab and the inside surface of said casing.
10. A module according to claim 1 , wherein the tabs are secured to the casing without any bolts.
11. A combustion chamber module comprising an annular combustion chamber and an outer casing, the combustion chamber being attached to the outer casing, wherein the downstream end of an outer wall of said combustion chamber is secured to an annular connection part that includes a plurality of fastener tabs directed radially outwards and upstream, and wherein each tab end that is engaged in a hook-forming groove that is laterally open in a downstream direction and that is secured to the inside wall of the casing, wherein the end of each tab is shaped with a groove that is open in an upstream direction and that co-operates with a corresponding one of said grooves of said casing.
12. A combustion chamber module according to claim 11 , wherein said tabs are shaped so that, when cold, clamping is exerted between the radially outermost surface of the groove of each tab and the radially innermost surface of the corresponding groove of said casing.
13. A combustion chamber module according to claim 11 , wherein said fastener tabs are regularly distributed circumferentially.
14. A combustion chamber module according to claim 13 , wherein said fastener tabs are eighteen in number.
15. A combustion chamber module according to claim 11 , wherein the inside wall of said casing is provided with a plurality of individualized hook-forming grooves distributed circularly so as to correspond with respective ones of said fastener tabs, each groove receiving the end of one fastener tab.