IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0654672
(2012-10-18)
|
등록번호 |
US-9238971
(2016-01-19)
|
발명자
/ 주소 |
- Casavant, Matthew Stephen
- Black, Kenneth Damon
- Johnson, David Martin
- Danescu, Radu Ioan
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
19 |
초록
▼
A device for directing gas impingement to an inner casing of a gas turbine may include a plate configured for attachment to the outer surface of the inner casing. The plate has a first surface opposing the inner casing when the plate is attached to an area of the inner casing and a second surface op
A device for directing gas impingement to an inner casing of a gas turbine may include a plate configured for attachment to the outer surface of the inner casing. The plate has a first surface opposing the inner casing when the plate is attached to an area of the inner casing and a second surface opposite the first surface. The plate defines a plurality of holes through the plate from the first surface to the second surface. The holes are arranged with a predetermined non-uniform distribution in the plate corresponding to a desired preferential impingement pattern for providing non-uniform heat transfer from the area during operation of the gas turbine so as to control temperature of the inner casing across the area. Various options and modifications are possible. Related gas turbine assemblies are also disclosed.
대표청구항
▼
1. A device for directing gas impingement to an inner casing of a gas turbine, the device comprising: a plate configured for attachment to the outer surface of the inner casing, the plate having a first surface opposing the inner casing when the plate is attached to an area of the inner casing, a se
1. A device for directing gas impingement to an inner casing of a gas turbine, the device comprising: a plate configured for attachment to the outer surface of the inner casing, the plate having a first surface opposing the inner casing when the plate is attached to an area of the inner casing, a second surface opposite the first surface and a flange that extends radially inwardly from the first surface towards the inner casing entirely about a perimeter of the plate, the plate defining a plurality of holes through the plate from the first surface to the second surface, the holes arranged with a predetermined non-uniform distribution in the plate corresponding to a desired preferential impingement pattern for providing non-uniform heat transfer from the area during operation of the gas turbine so as to control temperature of the inner casing across the area, wherein the flange is disposed within a slot defined within the outer surface of the inner casing forming a sealed cavity between the outer surface and the first surface. 2. The device of claim 1, further including a least one mounting assembly for attaching the plate to the inner casing. 3. The device of claim 2, wherein the mounting assembly is configured to attach the plate to the inner casing so that the plate can float relative to the inner casing area during operation of the gas turbine to account for changes in size of the inner casing during operation. 4. The device of claim 1, wherein the flange is seated in the slot of the inner casing and forms a flanged interface with the slot that is substantially airtight. 5. The device of claim 1, wherein the predetermined non-uniform distribution includes providing holes of differing sizes in different portions of the plate. 6. The device of claim 1, wherein the predetermined non-uniform distribution includes arranging holes such that different portions of the plate comprise holes than other portions of the plate. 7. The device of claim 1, wherein the predetermined non-uniform distribution includes having holes of different sizes disposed across the plate. 8. The device of claim 1, wherein the plate has two ends and a middle portion between the ends, the predetermined non-uniform distribution including providing a higher concentration of holes proximate at least one of the ends than in the middle portion. 9. The device of claim 1, wherein the plate has two ends and a middle portion between the ends, the predetermined non-uniform distribution including providing a larger holes proximate at least one of the ends than in the middle portion. 10. A gas turbine casing assembly comprising: an inner casing arranged around a central axis, the inner casing defining an opening therethrough in communication with an interior of the gas turbine;an outer casing arranged around the inner casing; andat least one plate attached to an outer surface of the inner casing, the plate having a first surface opposing the inner casing, a second surface opposite the first surface, and a flange that extends radially inwardly from the first surface towards the inner casing and that extends continuously about a perimeter of the plate, the plate defining a plurality of holes through the plate from the first surface to the second surface, the holes arranged with a predetermined non-uniform distribution in the plate corresponding to a desired preferential impingement pattern for providing non-uniform heat transfer from the area during operation of the gas turbine so as to control temperature of the inner casing across the area, the plate and inner casing defining a thermal control gas flow path from radially outside of the plate through the holes in the plate and then through the inner casing into the interior of the gas turbine, wherein the flange is disposed within a slot defined within the outer surface of the inner casing forming a sealed cavity between the outer surface and the first surface. 11. The gas turbine casing assembly of claim 10, further including a least one mounting assembly for attaching the plate to the inner casing. 12. The gas turbine casing assembly of claim 11, wherein the mounting assembly is configured to attach the plate to the inner casing so that the plate can float relative to the inner casing area during operation of the gas turbine to account for changes in size of the inner casing during operation. 13. The gas turbine casing assembly of claim 10, wherein the flange is seated within the slot and forms a flanged interface with the slot that is substantially airtight. 14. The gas turbine casing assembly of claim 10, wherein the predetermined non-uniform distribution includes providing holes of differing sizes in different portions of the plate. 15. The gas turbine casing assembly of claim 10, wherein the predetermined non-uniform distribution includes arranging holes such that different portions of the plate comprise more holes than other portions of the plate. 16. The gas turbine casing assembly of claim 10, wherein the predetermined non-uniform distribution includes having holes of different sizes disposed across the plate. 17. The gas turbine casing assembly of claim 10, further including a passageway for receiving thermal control gas from a compressor to a space between the outer casing and the inner casing. 18. The gas turbine casing assembly′ of claim 10, wherein the inner casing is formed of several inner casing sections and at least one of the plates is attached to each inner casing section. 19. A gas turbine comprising: a compressor section;a combustion section downstream from the compressor section; anda turbine section downstream from the combustion section, wherein the turbine section includes: an inner casing arranged around a central axis, the inner casing defining an opening therethrough in communication with an interior of the turbine section;an outer casing arranged around the inner casing; andat least one plate attached to an outer surface of the inner casing, the plate having a first surface opposing the inner casing, a second surface opposite the first surface and a flange that extends radially inwardly from the first surface towards the inner casing, and that extends continuously about a perimeter of the plate, the plate defining a plurality of holes through the plate from the first surface to the second surface, the holes arranged with a predetermined non-uniform distribution in the plate corresponding to a desired preferential impingement pattern for providing non-uniform heat transfer from the area during operation of the gas turbine so as to control temperature of the inner casing across the area, the plate and inner casing defining a thermal control gas flow path from radially outside of the plate through the holes in the plate and then through the inner casing into the interior of the turbine section, wherein the flange is disposed within a slot defined within the outer surface of the inner casing forming a sealed cavity between the outer surface and the first surface. 20. The gas turbine of claim 19, wherein the predetermined non-uniform distribution includes providing holes of differing sizes in different portions of the plate. 21. The gas turbine of claim 19, wherein the predetermined non-uniform distribution includes arranging holes such that different portions of the plate comprise more holes than other portions of the plate.
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