IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0392555
(2009-02-25)
|
등록번호 |
US-8172528
(2012-05-08)
|
우선권정보 |
JP-2008-050931 (2008-02-29) |
발명자
/ 주소 |
- Kawakami, Hiroshi
- Iwai, Yasunori
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
One aspect of the present invention provides a steam turbine comprising a rotor and a casing that installs the rotor inside, wherein the casing comprises an upper-half section and a lower-half section, which are coupled with each other by an upper-half flange and a lower-half flange thereof, wherein
One aspect of the present invention provides a steam turbine comprising a rotor and a casing that installs the rotor inside, wherein the casing comprises an upper-half section and a lower-half section, which are coupled with each other by an upper-half flange and a lower-half flange thereof, wherein the upper-half section includes: a semi-cylindrical wrapper plate extending in an axial direction of the rotor, end plates coupled with the wrapper plate, each of the end plate is disposed perpendicular to the rotor, wherein at least one of axial ends of the wrapper plate includes a wrapper plate projecting portion that projects from the corresponding end plates in the axial direction, and a first end plate reinforcing rib disposed on the outside surfaces of the end plates in a peripheral direction of the inner periphery of the wrapper plate; and a plurality of second end plates reinforcing ribs disposed radially on the outside surfaces of the end plates, wherein the second end plates reinforcing ribs couple the wrapper plate projecting portion with the first end plate reinforcing rib.
대표청구항
▼
1. A steam turbine comprising: a rotor; anda casing that installs the rotor inside, the casing comprising:an upper-half section; anda lower-half section, the upper half-section coupled with the lower-half section by an upper-half flange of the upper-half section and a lower-half flange of the lower-
1. A steam turbine comprising: a rotor; anda casing that installs the rotor inside, the casing comprising:an upper-half section; anda lower-half section, the upper half-section coupled with the lower-half section by an upper-half flange of the upper-half section and a lower-half flange of the lower-half section, wherein the upper-half section includes:a semi-cylindrical wrapper plate extending in an axial direction of the rotor;end plates coupled with the wrapper plate, each of the end plates being disposed perpendicular to the rotor, wherein at least one of axial ends of the wrapper plate includes a wrapper plate projecting portion that projects from the corresponding end plates in the axial direction;a first end plate reinforcing rib disposed on the outside surfaces of the end plates in a peripheral direction of an inner periphery of the wrapper plate; anda plurality of second end plates reinforcing ribs disposed radially on outside surfaces of the end plates, wherein the second end plates reinforcing ribs couple the wrapper plate projecting portion with the first end plate reinforcing rib,wherein the wrapper plate projecting portion is coupled with the upper-half flange, the upper-half flange including an upper-half flange projecting portion provided at a coupling position of the wrapper plate projecting portion and the upper-half flange, the upper-half flange projecting portion projecting in a direction along the wrapper plate projecting portion. 2. The steam turbine according to claim 1, wherein the upper-half section further includes first wrapper plate reinforcing ribs disposed on the outside surface of the wrapper plate, the first wrapper plate reinforcing ribs being provided, in the axial direction, at the wrapper plate projecting portion, and the second end plates reinforcing ribs. 3. The steam turbine according to claim 2, wherein the end plates include an end plate projecting portion that projects from the wrapper plate in a radial direction of the rotor, the first wrapper plate reinforcing ribs coupling the end plate projecting portion with the wrapper plate projecting portion. 4. The steam turbine according to claim 3, wherein the upper-half section further includes a second wrapper plate reinforcing rib disposed on an outside surface of the wrapper plate in parallel with the end plates. 5. The steam turbine according to claim 1, wherein the upper-half flange projecting portion is provided in both sides along the wrapper plate projecting portion. 6. The steam turbine according to claim 1, wherein the upper-half flange projecting portion further includes a plurality of flange bolt holes so as to fasten the upper-half section to the lower-half section. 7. The steam turbine according to claim 1, wherein the lower-half section further includes: a lower-half flange coupled with the upper-half flange of the upper-half section; and a leg plate reinforcing rib provided on an outside surface of the lower half section at a position of the lower-half flange. 8. A steam turbine comprising: a rotor; anda casing that installs the rotor inside, the casing comprising:an upper-half section; anda lower-half section, the upper half-section coupled with the lower-half section by an upper-half flange of the upper-half section and a lower-half flange of the lower-half section, wherein the upper-half section includes:a semi-cylindrical wrapper plate extending in an axial direction of the rotor;end plates coupled with the wrapper plate, each of the end plates being disposed perpendicular to the rotor, wherein at least one of axial ends of the wrapper plate includes a wrapper plate projecting portion that projects from the corresponding end plates in the axial direction;a first end plate reinforcing rib disposed on the outside surfaces of the end plates in a peripheral direction of an inner periphery of the wrapper plate; anda plurality of second end plates reinforcing ribs disposed radially on outside surfaces of the end plates, wherein the second end plates reinforcing ribs couple the wrapper plate projecting portion with the first end plate reinforcing rib,wherein the first end plate reinforcing rib is coupled with the upper-half flange, the upper half-flange including an upper half-flange projecting portion provided at a coupling position of the first end plate reinforcing rib and the upper-half flange, the upper-half flange projecting portion projecting in a direction along the first end plate reinforcing rib. 9. The steam turbine according to claim 8, wherein the upper-half flange projecting portion is provided in both sides along the first end plate reinforcing rib. 10. The steam turbine according to claim 8, wherein the upper-half flange projecting portion further includes a plurality of flange bolt holes so as to fasten the upper-half section to the lower-half section. 11. The steam turbine according to claim 8, wherein the lower-half section further includes: a lower-half flange coupled with the upper-half flange of the upper-half section; and a leg plate reinforcing rib provided on an outside surface of the lower half section at a position of the lower-half flange. 12. A steam turbine comprising: a rotor: anda casing that installs the rotor inside, the casing comprising:an upper-half section; anda lower-half section, the upper half-section coupled with the lower-half section by an upper-half flange of the upper-half section and a lower-half flange of the lower-half section, wherein the upper-half section includes:a semi-cylindrical wrapper plate extending in an axial direction of the rotor;end plates coupled with the wrapper plate, each of the end plates being disposed perpendicular to the rotor, wherein at least one of axial ends of the wrapper plate includes a wrapper plate projecting portion that projects from the corresponding end plates in the axial direction;a first end plate reinforcing rib disposed on the outside surfaces of the end plates in a peripheral direction of an inner periphery of the wrapper plate; anda plurality of second end plates reinforcing ribs disposed radially on outside surfaces of the end plates, wherein the second end plates reinforcing ribs couple the wrapper plate projecting portion with the first end plate reinforcing rib,wherein an end plate projecting portion is coupled with the upper-half flange, the upper half-flange including an upper-half flange projecting portion provided at a coupling position of the end plate projecting portion and the upper-half flange, the upper-half flange projecting portion projecting in a direction along the end plate projecting portion. 13. The steam turbine according to claim 12, wherein the upper-half flange projecting portion is provided in both sides along the end plate projecting portion. 14. The steam turbine according to claim 12, wherein the upper-half flange projecting portion further includes a plurality of flange bolt holes so as to fasten the upper-half section to the lower-half section. 15. The steam turbine according to claim 12, wherein the lower-half section further includes: a lower-half flange coupled with the upper-half flange of the upper-half section; and a leg plate reinforcing rib provided on an outside surface of the lower half section at a position of the lower-half flange. 16. A steam turbine comprising: a rotor; anda casing that installs the rotor inside, the casing comprising:an upper-half section; anda lower-half section, the upper half-section coupled with the lower-half section by an upper-half flange of the upper-half section and a lower-half flange of the lower-half section, wherein the upper-half section includes:a semi-cylindrical wrapper plate extending in an axial direction of the rotor;end plates coupled with the wrapper plate, each of the end plates being disposed perpendicular to the rotor, wherein at least one of axial ends of the wrapper plate includes a wrapper plate projecting portion that projects from the corresponding end plates in the axial direction;a first end plate reinforcing rib disposed on the outside surfaces of the end plates in a peripheral direction of an inner periphery of the wrapper plate; anda plurality of second end plates reinforcing ribs disposed radially on outside surfaces of the end plates, wherein the second end plates reinforcing ribs couple the wrapper plate projecting portion with the first end plate reinforcing rib,wherein a second wrapper plate reinforcing rib is coupled with the upper-half flange, the upper-half flange including an upper half flange projecting portion provided at a coupling position of the second wrapper plate reinforcing rib and the upper-half flange, the upper-half flange projecting portion projecting in a direction along the second wrapper plate reinforcing rib. 17. The steam turbine according to claim 14, wherein the upper-half flange projecting portion is provided in both sides along the second wrapper plate reinforcing rib. 18. The steam turbine according to claim 14, wherein the upper-half flange projecting portion further includes a plurality of flange bolt holes so as to fasten the upper-half section to the lower-half section. 19. The steam turbine according to claim 14, wherein the lower-half section further includes: a lower-half flange coupled with the upper-half flange of the upper-half section; and a leg plate reinforcing rib provided on an outside surface of the lower half section at a position of the lower-half flange.
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