| 摘要 |
A steam turbine has a single-shell turbine casing and specific inner casings arranged inside the turbine casing. The steam turbine has a turbine casing with an outer wall, a turbine shaft mounted rotatably about a turbine axis in the turbine casing, a first turbine part, and at least one second turbine part which is arranged downstream of the first turbine part in the axial direction of the turbine shaft, wherein the expansion direction for steam conducted through the steam turbine runs from the first turbine part to the second turbine part, wherein between the first turbine part and the second turbine part, a sealing shell is arranged on the turbine casing, in particular on the inner side of the outer wall for rotation therewith, the sealing shell being formed in a sealing manner with respect to the turbine shaft via sealing elements. |
| 主权项 |
1. A steam turbine, comprising
a turbine casing with an outer wall, a turbine shaft mounted rotatably about a turbine axis in the turbine casing, a first turbine part, and at least one second turbine part which is arranged downstream of the first turbine part in the axial direction of the turbine shaft, wherein the expansion direction for steam conducted through the steam turbine runs from the first turbine part to the second turbine part, between the first turbine part and the second turbine part, a sealing shell arranged on the turbine casing, said sealing shell being formed in a sealing manner with respect to the turbine shaft via sealing elements, in the first turbine part, a first inner casing is arranged rotationally symmetrically about the part and sealed with respect to the turbine shaft on the inner side of the outer wall, wherein the first inner facing has a first sealing region which is perpendicular or approximately perpendicular to the turbine axis and divides the first turbine part with respect to the expansion direction into a front part and a rear part, and has a first blade region which is parallel or approximately parallel to the turbine axis, a first guide vane blading is arranged on the inner wall of the first blade region which inner wall faces the turbine shaft, and a first rotor blading corresponding to the first guide vane blading arranged on the turbine shaft, in the second turbine part, a second inner casing is arranged rotationally symmetrically about the part with respect to the expansion direction into a front part and a rear part, and has a second blade region which is parallel or approximately parallel to the turbine axis, a second guide vane blading is arranged on the inner wall of the second blade region, which inner wall faces the turbine shaft, and a second rotor blading corresponding to the second guide vane blading is arranged on the turbine shaft, wherein the blade regions of the inner casings each extend of a from the respective sealing regions counter to the expansion direction, wherein fresh steam can be guided via at least one fresh steam line through the outer wall of the turbine casing and through the first blade region of the first inner casing into the region between the first blade region and the first sealing region, the turbine shaft and the first blading, wherein the sealing regions have, in the region facing the outer wall, respective openings through which steam can pass from the front part in each case into the respective rear part of the turbine parts, wherein cold steam can be guided out of the rear part of the first turbine part via at least one first intermediate steam line, wherein superheated steam can be guided via at least one second intermediate steam line through the outer wall of the turbine casing and through the second blade region of the second inner casing into the region between the second blade region and the second sealing region, the turbine shaft of the second blading, and wherein exhaust steam from the rear part of the second turbine part can be guided out of the turbine casing via at least one steam outlet line in the outer wall. |
