IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0632152
(2009-12-07)
|
등록번호 |
US-8568090
(2013-10-29)
|
발명자
/ 주소 |
- Guo, Tao
- Slepski, Jonathon E.
- Koza, Kenneth M.
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
3 |
초록
▼
A system for removing moisture from a steam/water mixture engaging a stationary component of a steam turbine. The system includes an airfoil located within a flow path of a steam turbine. The airfoil is configured for removing moisture from a steam/water mixture traveling in the flow path. To this e
A system for removing moisture from a steam/water mixture engaging a stationary component of a steam turbine. The system includes an airfoil located within a flow path of a steam turbine. The airfoil is configured for removing moisture from a steam/water mixture traveling in the flow path. To this end, the airfoil includes a cavity in flow communication with the steam path through at least one inlet and outlet opening, near the leading and trailing edge of the airfoil, respectively. Moisture and steam are extracted from the surface through the inlet openings, the steam and water are separated in the cavity, the separated water flows towards the bottom end, and the dry steam flows through the outlet opening and returns to the steam path. The dry steam blowing out of the trailing edge reduces the size of secondary droplets, and thereby prevents erosion.
대표청구항
▼
1. A system for removing moisture from a steam/water mixture engaging a stationary component of a steam turbine, the system comprising: an airfoil disposed in a group of airfoils located within a flow path of a steam turbine, wherein the airfoil is configured for removing moisture from a steam/water
1. A system for removing moisture from a steam/water mixture engaging a stationary component of a steam turbine, the system comprising: an airfoil disposed in a group of airfoils located within a flow path of a steam turbine, wherein the airfoil is configured for removing moisture from a steam/water mixture traveling in the flow path, the airfoil comprising: first and second longitudinal ends and an outer peripheral wall that integrates the first and second longitudinal ends, wherein the first and second longitudinal ends and the outer peripheral wall collectively define: a leading edge, a trailing edge, a suction-side face, and a pressure-side face;an extraction cavity laterally extending between a portion of the leading edge and a portion of the trailing edge, wherein the extraction cavity comprises an inlet opening in flow communication with the flow path, and an outlet opening in flow communication with the flow path; anda cavity configured for substantially separating the steam/water mixture into steam and water, wherein the cavity longitudinally extends within a portion of the airfoil; the cavity comprising a top end integrated with the extraction cavity, and a bottom end configured for allowing water to exit the airfoil;wherein operatively as the steam/water mixture travels in the flow path, the inlet opening draws in a portion of the steam/water mixture, then a pressure drop across the leading edge and the trailing edge allows for the portion of the steam/water mixture to enter the cavity, and densities of the steam and water allow for the water to separate from the steam, wherein the water then flows towards the bottom end, and the steam flows through the outlet opening and returns to the steam path. 2. The system of claim 1, wherein the inlet opening is located on a portion of the leading edge. 3. The system of claim 2, wherein the outlet opening is located on a portion of the trailing edge. 4. The system of claim 1, further comprising multiple inlet openings. 5. The system of claim 1, further comprising multiple outlet openings. 6. The system of claim 1, further comprising a moisture drain integrated with the bottom end of the cavity. 7. The system of claim 6, further comprising a moisture draining system configured for removing the water from the airfoil. 8. The system of claim 1, wherein the inlet opening is located on the pressure side of the airfoil. 9. The system of claim 8, wherein the outlet opening is located on the trailing edge of the airfoil. 10. The system of claim 1 further comprising a swirling mechanism adapted for separating the water from the steam. 11. A system for removing water from a steam/water mixture engaging a stationary component of a steam turbine, the system comprising: an airfoil disposed in a group of airfoils located within a flow path of a steam turbine, wherein the airfoil is configured for removing moisture from a steam/water mixture traveling in the flow path, the airfoil comprising: first and second longitudinal ends and an outer peripheral wall that integrates the first and second longitudinal ends, wherein the first and second longitudinal ends and the outer peripheral wall collectively define: a leading edge, a trailing edge, a suction-side face, and a pressure-side face;an extraction cavity laterally extending between a portion of the leading edge and a portion of the trailing edge, wherein the extraction cavity comprises an inlet opening in flow communication with the flow path, and an outlet opening in flow communication with the flow path; wherein the inlet opening is located on a portion of the leading edge; andwherein the outlet opening is located on a portion of the trailing edge; anda cavity configured for substantially separating the steam/water mixture into steam and water, wherein the cavity longitudinally extends within a portion of the airfoil; the cavity comprising a top end integrated with the steam extraction cavity, and a bottom end configured for allowing water to exit the airfoil;wherein operatively as the steam/water mixture travels in the flow path, the inlet opening draws in a portion of the steam/water mixture, then a pressure drop across the leading edge and the trailing edge allows for the portion of the steam/water mixture to enter the cavity, and densities of the steam and water allow for the water to separate from the steam, wherein the water then flows towards the bottom end, and the steam flows through the outlet opening and returns to the steam path. 12. The system of claim 11, further comprising at least two inlet openings, wherein the at least two inlet openings comprise a plurality of discrete holes communicating with the flow path. 13. The system of claim 11, further comprising at least two outlet openings, wherein the at least two outlet openings comprise a plurality of discrete holes communicating with the flow path. 14. The system of claim 11, further comprising a water drainage system integrated with the bottom end of the cavity, wherein the water drainage system is configured for removing the water from the airfoil. 15. The system of claim 14, further comprising multiple airfoil groups, wherein each group comprises a stage. 16. The system of claim 15, wherein the cavity associated with each stage comprises a size relative to an estimated amount of water content within the steam/water mixture at each stage. 17. The system of claim 16, wherein the water drainage system of each stage is integrated and operatively discharges the fluid to a common receiver. 18. The system of claim 11, wherein the inlet opening is adjacent the pressure side of the airfoil. 19. The system of claim 18, wherein the outlet opening is adjacent the trailing edge of the airfoil. 20. The system of claim 11, a swirler adapted for separating the water from the steam, wherein a portion of the swirler is located within the cavity.
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