Housing for a gas turbine, aircraft engine, and a process for operating a gas turbine
A housing for a gas turbine is disclosed. At least one wall element is housed on the housing so as to move, which limits a flow channel of the housing in the radial direction from a rotational axis of a rotor of the gas turbine toward the exterior. The housing includes at least one variably adjustable guide blade which extends through the wall element into the flow channel. The wall element can be moved between a sealing setting, in which the wall element makes contact at least in a partial area of a side of a blade leaf of the guide blade facing toward the wall element, and an open setting, in which the blade leaf and the wall element are spaced some distance apart from one another. A gas turbine as well as a process for operating a gas turbine is also disclosed.
1. A housing for a gas turbine, comprising:
a wall element movably disposed on the housing, wherein the wall element limits a flow channel of the housing in a radial direction from a rotational axis of a rotor of the gas turbine; and
a variably adjustable guide blade which extends through the wall element into the flow channel;
wherein the wall element defines an opening and wherein a blade disk of the guide blade is disposed in the opening;
wherein the wall element is movable between a sealing setting in which the wall element makes contact with at least a partial area of a side of a blade leaf of the guide blade facing toward the wall element and an open setting in which the blade leaf and the wall element are spaced apart.
2. The housing according to claim 1 , wherein the wall element is movable between the sealing setting and the open setting by a fluid under pressure.
3. The housing according to claim 2 , further comprising:
a pressure supply line, wherein the fluid under pressure is supplyable by the pressure supply line; and
a pressure relief line, wherein the fluid under pressure is dischargeable by the pressure relief line.
4. The housing according to claim 3 , wherein the pressure supply line and/or the pressure relief line includes a valve.
5. The housing according to claim 1 , wherein the wall element is retained on a housing element by a bearing.
6. The housing according to claim 1 , further comprising a sealing element disposed between the wall element and an adjacent housing element.
7. The housing according to claim 6 , wherein the wall element is retained on a housing element by a bearing and wherein the sealing element is arranged on a side of the wall element opposite from the bearing.
8. The housing according to claim 1 , wherein a surface of the wall element adjoining the flow channel and the blade disk of the guide blade are essentially connected flush with one another in the sealing setting.
9. The housing according to claim 1 , wherein the wall element and the guide blade are fastened to one another with friction contact in the sealing setting.
10. The housing according to claim 1 , further comprising a stop element which limits a movement of the wall element into the sealing setting and/or into the open setting.
11. A gas turbine comprising a housing according to claim 1 .
12. A method for operating a gas turbine having a housing according to claim 1 , comprising the step of:
moving the wall element between the sealing setting and the open setting.
13. The method according to claim 12 , further comprising the steps of:
moving the wall element into the open setting;
adjusting the guide blade; and
moving the wall element into the sealing setting.
14. A housing for a gas turbine, comprising:
a wall element movably disposed on the housing, wherein the wall element limits a flow channel of the housing in a radial direction from a rotational axis of a rotor of the gas turbine;
a variably adjustable guide blade which extends through the wall element into the flow channel;
wherein the wall element is movable between a sealing setting in which the wall element makes contact with at least a partial area of a side of a blade leaf of the guide blade facing toward the wall element and an open setting in which the blade leaf and the wall element are spaced apart;
wherein the wall element is movable between the sealing setting and the open setting by a fluid under pressure;
a pressure supply line, wherein the fluid under pressure is supplyable by the pressure supply line; and
a pressure relief line, wherein the fluid under pressure is dischargeable by the pressure relief line;
wherein a drain-off channel of the pressure relief line has a larger cross-section than an access channel of the pressure supply line.