Mounting a high pressure turbine nozzle in leaktight manner to one end of a combustion chamber in a gas turbine
First Claim
1. A gas turbine comprising:
- an annular combustion chamber having an inner wall and an outer wall;
a high pressure turbine nozzle having a plurality of stationary vanes distributed around an axis that coincides with the axis of the combustion chamber, the vanes having airfoils secured to inner and outer platforms in the form of juxtaposed ring sectors with inside faces defining between them a flow path through the turbine nozzle for the gas stream coming from the combustion chamber; and
connection means for mechanically connecting the turbine nozzle to downstream end portions of the inner and outer walls of the combustion chamber;
wherein;
the downstream end portions of the inner and outer walls of the combustion chamber are pressed against the inner and outer platforms respectively of the vanes of the turbine nozzle substantially all the way to the downstream ends of the platforms; and
the connection means are formed by substantially radial connection screws implanted in vane airfoils of the turbine nozzle, passing through holes formed in the end portions of the inner and outer walls of the combustion chamber.
4 Assignments
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Accused Products
Abstract
The downstream end portions of the inner and outer walls of the combustion chamber of the gas turbine are pressed against the inner and outer platforms respectively of the vanes of the high pressure turbine nozzle and they extend thereover substantially to the downstream end of the platforms, and the means for mechanically connecting the turbine nozzle to the downstream end portions of the combustion chamber walls are formed by connection screws implanted in the airfoils of the vanes of the turbine nozzle, passing through holes formed in the end portions of the combustion chamber walls. Thus, the downstream end portions of the combustion chamber walls contribute to preventing leakage from the gas stream at the interface between the chamber and the nozzle, and also along the nozzle.
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Citations
10 Claims
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1. A gas turbine comprising:
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an annular combustion chamber having an inner wall and an outer wall; a high pressure turbine nozzle having a plurality of stationary vanes distributed around an axis that coincides with the axis of the combustion chamber, the vanes having airfoils secured to inner and outer platforms in the form of juxtaposed ring sectors with inside faces defining between them a flow path through the turbine nozzle for the gas stream coming from the combustion chamber; and connection means for mechanically connecting the turbine nozzle to downstream end portions of the inner and outer walls of the combustion chamber; wherein; the downstream end portions of the inner and outer walls of the combustion chamber are pressed against the inner and outer platforms respectively of the vanes of the turbine nozzle substantially all the way to the downstream ends of the platforms; and the connection means are formed by substantially radial connection screws implanted in vane airfoils of the turbine nozzle, passing through holes formed in the end portions of the inner and outer walls of the combustion chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification