gas turbine engine

Abstract

The present invention provides a gas turbine engine that can absorb changes in pipe length due to thermal expansion. [Solution] A gas turbine engine according to one embodiment comprises a rotating shaft extending in the front-rear direction, a plurality of bearings supporting the rotating shaft, an engine assembly including a compressor, a combustor, and a turbine arranged from front to rear along the rotating shaft, and at least one pipe for guiding lubricant or air, the pipe including an outer fixed pipe fixed to the engine assembly, an inner fixed pipe fixed to the engine assembly radially inward of the rotating shaft than the outer fixed pipe, and a bellows pipe connecting the outer fixed pipe and the inner fixed pipe.

Claims

1. A rotation axis extending in the front-to-back direction, At least one bearing supporting the aforementioned rotating shaft, An engine assembly including a compressor, combustor, and turbine arranged along the aforementioned rotating shaft, A combustion gas flow path that guides the combustion gas to the turbine, The combustion gas passage includes at least one pipe that penetrates radially and guides a lubricant or air, The aforementioned piping is An outer fixing pipe that is fixed to the engine assembly, An inner fixing pipe is fixed to the engine assembly radially inward from the outer fixing pipe, and the inner fixing pipe is fixed to the engine assembly at a position radially inward from the rotation shaft. A gas turbine engine comprising a bellows tube located radially outward from the combustion gas flow path, connecting the outer fixed pipe and the inner fixed pipe, and absorbing the thermal expansion of the piping.

2. The gas turbine engine according to claim 1, wherein the at least one pipe includes a lubricant supply pipe for guiding a lubricant.

3. The gas turbine engine according to claim 2, wherein the lubricant supply pipe leads to a lubricant for lubricating the rearmost of the at least one bearing.

4. The gas turbine engine according to claim 2 or 3, wherein the lubricant supply pipe is located between the compressor and the rearmost bearing of the at least one bearing in the front-rear direction.

5. The aforementioned gas turbine engine is a twin-shaft gas turbine engine. The rotating shaft includes a low-pressure shaft and a high-pressure shaft that is arranged on the same axis as the low-pressure shaft and is rotatable relative to the low-pressure shaft. The at least one bearing includes a plurality of first bearings supporting the low-pressure shaft and a plurality of second bearings supporting the high-pressure shaft, The gas turbine engine according to claim 2 or 3, wherein the lubricant supply pipe is positioned between the rearmost of the plurality of first bearings and the rearmost of the plurality of second bearings in the front-rear direction.

6. The engine assembly includes a seal air supply space that communicates with the bearing space in which the at least one bearing is located. The gas turbine engine according to claim 1 or 2, wherein the at least one piping includes a seal air supply pipe that leads compressed air into the seal air supply space.

7. The aforementioned piping is in a straight line, The aforementioned inner fixing pipe is A first engaging portion is provided on the outer circumferential surface of the inner fixing pipe, and is capable of engaging with the engaged portion of the engine assembly by rotating it about the center line of the inner fixing pipe. The gas turbine engine according to claim 1 or 2, further comprising a second engaging portion disposed on the inner circumferential surface of the inner fixing tube and capable of engaging with a rotating tool for rotating the inner fixing tube about the center line of the inner fixing tube.

8. The engine assembly includes a bearing housing that secures the inner fixing tube and holds the at least one bearing, The gas turbine engine according to claim 1 or 2, wherein the bearing housing includes an inlet connected to the inner fixed pipe, an outlet opening into a bearing space in which at least one bearing is arranged, and a lubricant flow path connecting the inlet and the outlet and guiding the lubricant flowing in from the inlet to the outlet.

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