Face seal with locally compliant hydrodynamic pads
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-011/00
F01D-001/04
F01D-025/22
출원번호
US-0226617
(2014-03-26)
등록번호
US-9611749
(2017-04-04)
발명자
/ 주소
Thatte, Azam Mihir
Bidkar, Rahul Anil
Zheng, Xiaoqing
출원인 / 주소
General Electric Company
대리인 / 주소
Agosti, Ann M.
인용정보
피인용 횟수 :
0인용 특허 :
16
초록▼
Embodiments of the present disclosure are directed toward a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is con
Embodiments of the present disclosure are directed toward a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is configured to hydrodynamically engage with a rotor ring.
대표청구항▼
1. A system, comprising: a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is configured to hydrodynamically engag
1. A system, comprising: a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is configured to hydrodynamically engage with a rotor ring,wherein each of the plurality of pads is disposed in a respective recess formed in the sealing face of the stator ring,wherein each of the plurality of pads is biased toward the rotor ring by a plurality of springs extending from the respective recess to the respective pad. 2. The system of claim 1, wherein the pad springs comprise coil springs or bellow springs. 3. The system of claim 1, wherein each of the plurality of hydrodynamic pads comprises at least one hydrodynamic surface profile or treatment. 4. The system of claim 3, wherein the at least one hydrodynamic surface profile or treatment comprises a spiral groove. 5. A system, comprising: a steam turbine; anda face seal of the steam turbine, comprising: a rotor ring coupled to a rotor of the steam turbine; anda stator ring coupled to a stationary housing of the steam turbine, wherein the stator ring comprises a plurality of pads configured to extend from a sealing face of the stator ring and engage with the rotor ring,wherein each of the plurality of pads is disposed in a respective recess formed in the sealing face of the stator ring,wherein each of the plurality of pads is biased toward the rotor ring by a plurality of springs extending from the respective recess to the respective pad and allowing a first translational degree of freedom in an axial direction, a second rotating degree of freedom in a circumferential direction, and a third rotating degree of freedom in a radial direction. 6. The system of claim 5, wherein at least one of the plurality of the springs of each of the plurality of pads is coupled to a center of the respective pad. 7. The system of claim 5, wherein each of the plurality of pads is spaced equidistantly about a circumference of the stator ring. 8. A turbine, comprising: a rotor;a stationary housing disposed about the rotor; anda face seal disposed about the rotor, comprising: a rotor ring coupled to the rotor; anda stator ring coupled to the stationary housing, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring to the rotor ring,wherein each of the hydrodynamic pads comprises a plurality of hydrodynamic surface treatments each comprising a spiral groove extending from a first side of the hydrodynamic pad facing an inner diameter of the stator ring to an opposing second side of the hydrodynamic pad facing an outer diameter of the stator ring. 9. The turbine of claim 8, wherein the stator ring comprises a backing portion coupled to the stationary housing, and the stator ring is configured to hydrodynamically engage with the rotor ring. 10. The turbine of claim 9, wherein the stator ring is biased toward the rotor ring by a spring extending between the backing portion and the stator ring. 11. The turbine of claim 10, wherein each of the plurality of hydrodynamic pads is disposed in a respective pocket formed in the stator ring. 12. The turbine of claim 11, wherein each of the plurality of hydrodynamic pads is biased towards the rotor ring by a respective pad spring disposed between the respective pocket and the respective pad. 13. A turbine, comprising: a rotor;a stationary housing disposed about the rotor; anda face seal disposed about the rotor, comprising: a rotor ring coupled to the rotor; anda stator ring coupled to the stationary housing, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring to the rotor ring,wherein the stator ring comprises a backing portion coupled to the stationary housing, and the stator ring is configured to hydrodynamically engage with the rotor ring,wherein the stator ring is biased toward the rotor ring by a spring extending between the backing portion and the stator ring,wherein each of the plurality of hydrodynamic pads is disposed in a respective pocket formed in the stator ring, andwherein each of the plurality of hydrodynamic pads is biased towards the rotor ring by four respective pad springs disposed between the respective pocket and the respective pad, wherein each of the four respective pad springs is disposed at a corner of the respective pad. 14. The turbine of claim 13, wherein each of the hydrodynamic pads comprises at least one hydrodynamic surface treatment. 15. The turbine of claim 13, wherein the plurality of hydrodynamic pads is spaced equidistantly about the circumference of the stator ring. 16. The turbine of claim 13, where the plurality of hydrodynamic pads is radially positioned equally spaced along the stator ring.
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이 특허에 인용된 특허 (16)
Lipschitz Abraham (Warwick RI), Bi-directional, non-contact face seal.
Goldswain Ian M. (Woodlands Park GBX) Hignett Martin W. D. B. (Chiswick GBX), Mechanical seal containing a sealing face with grooved regions which generate hydrodynamic lift between the sealing face.
McNickle Alan D. (Sellersville PA) Hwang Mingfong (Lansdale PA) Pope Adam N. (Cincinnati OH), Seal for sealing an incompressible fluid between a relatively stationary seal and a movable member.
Radosav Jon J. (Des Plaines) Evans Thomas A. (Schaumburg) Dudek David M. (Palatine) Wieser Russell G. (Vernon Hills) Atwater Brian J. (Chicago) Eisbrenner Robert J. (Glenview IL), Split mechanical face seal.
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