IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0998383
(2004-11-29)
|
등록번호 |
US-7267525
(2007-09-11)
|
우선권정보 |
DE-103 55 738(2003-11-28) |
발명자
/ 주소 |
- Hiegemann,Michael
- Reigl,Martin
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
5 |
초록
▼
A rotor for a steam turbine for working steam and including at least two rotor parts welded to one another using a circumferential, annular weld zone, which is closed in the circumferential direction. A cooling channel system is formed in the rotor and has at least one inlet flow channel, at least o
A rotor for a steam turbine for working steam and including at least two rotor parts welded to one another using a circumferential, annular weld zone, which is closed in the circumferential direction. A cooling channel system is formed in the rotor and has at least one inlet flow channel, at least one outlet flow channel and at least one cooling channel. In order to simplify the integration of the cooling channel system in the rotor, the weld zone surrounds a cavity which forms a component of the cooling channel system and through which cooling steam flows.
대표청구항
▼
What is claimed is: 1. A rotor for a steam turbine for working steam extending along an axis of rotation, the rotor comprising: a first rotor part having a first axial end face and a first depression formed in the first axial end face; a second rotor part having a second axial end face and a second
What is claimed is: 1. A rotor for a steam turbine for working steam extending along an axis of rotation, the rotor comprising: a first rotor part having a first axial end face and a first depression formed in the first axial end face; a second rotor part having a second axial end face and a second depression formed in the second axial end face, the second rotor part disposed axially adjacent to the first rotor part so that the second axial end face faces the first axial end face, and welded to the first rotor part along the first and second axial end faces so that the first and second depressions form a cavity; an annular weld zone circumferentially surrounding the cavity and being closed in a circumferential direction; a cooling channel system formed in the rotor and including the cavity, the cooling channel system further including at least one inlet flow channel configured to receive cooling steam from the working steam at a region of an outer surface of the rotor, at least one outlet flow channel configured to pass the cooling steam to at least one cooling zone of the rotor, and at least one cooling channel disposed between the at least one inlet flow channel and the at least one outlet flow channel, the cooling steam flowing through the at least one cooling channel and the cavity. 2. The rotor as recited in claim 1, wherein the outlet flow channel passes the cooling steam through the at least one cooling zone. 3. The rotor as recited in claim 1, wherein the at least one cooling channel includes a first cooling channel that communicates with the at least one inlet flow channel and ends at the cavity and a second cooling channel that communicates with the at least one outlet flow channel and stains at the cavity. 4. The rotor as recited in claim 1, wherein the at least one cooling channel communicates with the at least one inlet flow channel and ends at the cavity, and wherein the at least one outlet flow channel starts at the cavity. 5. The rotor as recited in claim 1, wherein the at least one cooling channel communicates with the at least one outlet flow channel and starts at the cavity, and wherein the at least one inlet flow channel ends at the cavity. 6. The rotor as recited in claim 1, wherein the cooling channel is formed by the cavity, the at least one inlet flow channel ends at the cavity, and the at least one outlet flow channel starts at the cavity. 7. The rotor as recited in claim 1, wherein the at least one inlet flow channel extends in the first rotor part and the at least one outlet flow channel extends in the second rotor part. 8. The rotor as recited claimed in claim 1, wherein the second rotor part includes a further axial end face defining a further depression, the rotor further comprising: a third rotor part having a third axial end face and a third depression, the third rotor part disposed adjacent to the second rotor part so that the third axial end face faces toward the further axial end face, and welded to the second rotor part along the further and third axial end faces so as to form a further cavity; and a further weld zone circumferentially surrounding the further cavity, wherein the at least one cooling channel connects the cavity to the further cavity, wherein the at least one inlet flow channel ends at the cavity and the at least one outlet flow channel starts at the further cavity. 9. The rotor as recited in claim 8, wherein the at least one inlet flow channel extends in at least one of the first rotor part and the second rotor part, and wherein the at least one outlet flow channel extends in at least one of the third rotor part and the second rotor part. 10. The rotor as recited in claim 1, wherein the steam turbine is a single-flow machine and the at least one cooling zone includes a thrust balancing piston of the rotor. 11. The rotor as recited in claim 1, wherein the steam turbine is a two-flow machine having first and second flows of the steam and a plurality of turbine stages, and wherein the cooling steam is received in the at least one inlet flow channel at a first turbine stage from the first flow and wherein the at least one cooling zone includes at least a second turbine stage for the second flow. 12. The rotor as recited in claim 1, wherein the at least one cooling channel extends concentrically about the rotation axis. 13. The rotor as recited in claim 1, wherein the at least one cooling channel extends eccentrically with respect to the rotation axis and essentially parallel to the rotation axis. 14. The rotor as recited in claim 1, wherein the at least one inlet flow channel meets the cooling channel and extends in a direction with respect to the rotation axis that is one of an essentially radial direction, a diagonally concentric direction and a diagonally eccentric direction. 15. The rotor as recited in claim 14, wherein the at least one outlet flow channel meets the cooling channel and extends in a direction with respect to the rotation axis that is one of an essentially radial direction, a diagonally concentric direction and a diagonally eccentric direction. 16. The rotor as claimed claim 1, wherein the rotor is a drum rotor including a plurality of drums formed by the rotor parts. 17. A rotor for a steam turbine for working steam extending along axis of rotation, the rotor comprising: a first rotor part having a first axial end face defining a first depression; a second rotor part having a second axial end face defining a second depression, the second rotor part disposed adjacent to the first rotor part so that the second axial end face faces the first axial end face and the first and second depressions form a cavity; an annular weld zone at the first and second axial end faces circumferentially surrounding the cavity; a cooling channel system formed in the rotor and including the cavity, at least one inlet flow channel configured to receive cooling steam from the working steam at a region of an outer surface of the rotor and at least one outlet flow channel configured to pass the cooling steam to at least one cooling zone of the rotor, the cavity being disposed between the at least one inlet flow channel and the at least one outlet flow channel. 18. The rotor as recited in claim 17, wherein the cooling channel system further includes at least one cooling channel communicating with the at least one inlet flow channel, the at least one outlet flow channel, and the cavity. 19. The rotor as recited in claim 18, wherein the at least one cooling channel is disposed between the cavity and one of the at least one inlet flow channel and the at least one outlet flow channel. 20. The rotor as recited in claim 18, wherein the at least one cooling channel includes a first cooling channel disposed between the at least one inlet flow channel and the cavity and a second cooling channel disposed between the cavity and the at least one outlet flow channel.
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