Sealing apparatus and engine are provided. A sealing apparatus includes a first cover plate, a second cover plate spaced apart from the first cover plate, and a sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a f
Sealing apparatus and engine are provided. A sealing apparatus includes a first cover plate, a second cover plate spaced apart from the first cover plate, and a sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a first diaphragm member has a first stiffness and a second diaphragm member has a second stiffness that is different than the first stiffness. The sealing apparatus may be disposed in an engine.
대표청구항▼
1. A sealing apparatus comprising: a first cover plate;a second cover plate spaced apart from the first cover plate; anda sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a first diaphragm member has a first stiff
1. A sealing apparatus comprising: a first cover plate;a second cover plate spaced apart from the first cover plate; anda sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a first diaphragm member has a first stiffness and a second diaphragm member has a second stiffness that is different than the first stiffness. 2. The sealing apparatus of claim 1, wherein: the first diaphragm member includes a first outer diameter edge, a first inner diameter edge, a first band portion, and a first plurality of fingers, the first band portion is defined, in part, by the first outer diameter edge, and the first plurality of fingers is disposed circumferentially uniformly around the first diaphragm member and extends radially inwardly from the first band portion toward the first inner diameter edge;the second diaphragm member includes a second outer diameter edge, a second inner diameter edge, a second band portion, and a second plurality of fingers, the second band portion is defined, in part, by the second outer diameter edge, and the second plurality of fingers is disposed circumferentially uniformly around the second diaphragm member and extends radially inwardly from the second band portion toward the second inner diameter edge;a total number of fingers of the first plurality of fingers and a total number of fingers of the second plurality of fingers are equal to each other;a first finger outer end diameter of the first diaphragm member and a second finger outer end diameter of the second diaphragm member are not equal; andan inner diameter of the first diaphragm member and an inner diameter of the second diaphragm member are substantially equal. 3. The sealing apparatus of claim 1, wherein: the first diaphragm member includes a first outer diameter edge, a first inner diameter edge, a first band portion, and a first plurality of fingers, the first band portion is defined, in part, by the first outer diameter edge, and the first plurality of fingers is disposed circumferentially uniformly around the first diaphragm member and extends radially inwardly from the first band portion toward the first inner diameter edge;the second diaphragm member includes a second outer diameter edge, a second inner diameter edge, a second band portion, and a second plurality of fingers, the second band portion is defined, in part, by the second outer diameter edge, and the second plurality of fingers is disposed circumferentially uniformly around the second diaphragm member and extends radially inwardly from the second band portion toward the second inner diameter edge;each finger of the first plurality of fingers is substantially identical in configuration and has a first outer end, a first inner end, and a first length measured from the first outer end to the first inner end,each finger of the second plurality of fingers are substantially identical in configuration and has a second outer end, a second inner end, and a second length measured from the second outer end to the second inner end, andthe second length is not equal to the first length. 4. The sealing apparatus of claim 1, wherein a plurality of uniform gaps are formed between each finger of the first plurality of fingers, and each gap is narrower than each finger. 5. The sealing apparatus of claim 1, wherein: the first diaphragm member includes a first outer diameter edge, a first inner diameter edge, a first band portion, and a first plurality of fingers, the first band portion is defined, in part, by the first outer diameter edge, and the first plurality of fingers is disposed circumferentially uniformly around the first diaphragm member and extends radially inwardly from the first band portion toward the first inner diameter edge;the second diaphragm member includes a second outer diameter edge, a second inner diameter edge, a second band portion, and a second plurality of fingers, the second band portion is defined, in part, by the second outer diameter edge, and the second plurality of fingers is disposed circumferentially uniformly around the second diaphragm member and extends radially inwardly from the second band portion toward the second inner diameter edge;the first diaphragm member and the second diaphragm member are adjacent to each other;a first plurality of uniform gaps are formed between each finger of the first plurality of fingers,a second plurality of uniform gaps are formed between each finger of the second plurality of fingers, andthe first diaphragm member is clocked relative to the second diaphragm member such that each gap of the first plurality of uniform gaps in the first diaphragm member is at least partially blocked by a finger of the second plurality of fingers of the second diaphragm member. 6. The sealing apparatus of claim 1, further comprising: a first spacer disposed between the first cover plate and the sealing element; anda second spacer disposed between the second cover plate and the sealing element. 7. The sealing apparatus of claim 1, wherein: the at least two diaphragm members include a first outer diaphragm member, a second outer diaphragm member, and inner diaphragm members disposed between the first outer diaphragm member and the second outer diaphragm member, andstiffnesses of each successive diaphragm member decreases from the first outer diaphragm member to the second outer diaphragm member. 8. The sealing apparatus of claim 1, wherein: the at least two diaphragm members include a first outer diaphragm member, a second outer diaphragm member, and at least one inner diaphragm member disposed between the first outer diaphragm member and the second outer diaphragm member,the first stiffness of the first outer diaphragm member is greater than the second stiffness of at least one of the at least one inner diaphragm member; anda third stiffness of at least one of the at least one inner diaphragm members is less than a fourth stiffness of the second outer diaphragm member. 9. The sealing apparatus of claim 8, wherein the second stiffness and the third stiffness originate from a single inner diaphragm member. 10. The sealing apparatus of claim 8, wherein the second stiffness and the third stiffness originate from a first inner diaphragm member and a second inner diaphragm member, respectively. 11. An engine comprising: a stationary body;a seal rotor configured to rotate relative to the stationary body; anda sealing apparatus mounted to the stationary body to define a first cavity and a second cavity, the first cavity and the second cavity having different fluid pressures, the sealing apparatus including: a first cover plate mounted to the stationary body and extending toward the seal rotor;a second cover plate mounted to the stationary body and extending toward the seal rotor, the second cover plate spaced apart from the first cover plate; anda sealing element disposed between the first cover plate and the second cover plate and including at least two diaphragm members, wherein a first diaphragm member has a first stiffness and a second diaphragm member has a second stiffness that is different than the first stiffness. 12. The engine of claim 11, wherein: the first cavity has a fluid pressure that is greater than a fluid pressure of the second cavity;the first cover plate defines a portion of the first cavity; andthe second cover plate defines a portion of the second cavity. 13. The engine of claim 12, wherein: the first diaphragm member includes a first outer diameter edge, a first inner diameter edge, a first band portion, and a first plurality of fingers, the first band portion is defined, in part, by the first outer diameter edge, and the first plurality of fingers is disposed circumferentially uniformly around the first diaphragm member and extends radially inwardly from the first band portion toward the first inner diameter edge;the second diaphragm member includes a second outer diameter edge, a second diameter edge, a second band portion, and a second plurality of fingers, the second band portion is defined, in part, by the second outer diameter edge, and the second plurality of fingers is disposed circumferentially uniformly around the second diaphragm member and extends radially inwardly from the second band portion toward the second inner diameter edge;a total number of fingers of the first plurality of fingers and a total number of fingers of the second plurality of fingers are equal to each other;a first finger outer end diameter of the first diaphragm member and a second finger outer end diameter of the second diaphragm member are not equal; andan inner diameter of the first diaphragm member and an inner diameter of the second diaphragm member are substantially equal. 14. The engine of claim 13, wherein: each finger of the first plurality of fingers is substantially identical in configuration and has a first outer end, a first inner end, and a first length measured from the first outer end to the first inner end,each finger of the second plurality of fingers are substantially identical in configuration and has a second outer end, a second inner end, and a second length measured from the second outer end to the second inner end, andthe second length is not equal to the first length. 15. The engine of claim 13, wherein: the first diaphragm member and the second diaphragm member are adjacent to each other;a first plurality of uniform gaps are formed between each finger of the first plurality of fingers,a second plurality of uniform gaps are formed between each finger of the second plurality of fingers, andthe first diaphragm member is clocked relative to the second diaphragm member such that each gap of the first plurality of uniform gaps in the first diaphragm member is at least partially blocked by a finger of the second plurality of fingers of the second diaphragm member. 16. The engine of claim 13, further comprising: a first spacer disposed between the first cover plate and the sealing element; anda second spacer disposed between the second cover plate and the sealing element. 17. The engine of claim 11, wherein: the at least two diaphragm members include a first outer diaphragm member, a second outer diaphragm member, and inner diaphragm members disposed between the first outer diaphragm member and the second outer diaphragm member, anda stiffness of each successive diaphragm member decreases from the first outer diaphragm member to the second outer diaphragm member. 18. The engine of claim 11, wherein: the at least two diaphragm members include a first outer diaphragm member, a second outer diaphragm member, and inner diaphragm members disposed between the first outer diaphragm member and the second outer diaphragm member, andthe first stiffness of the first outer diaphragm member is greater than the second stiffness of at least one of the inner diaphragm members and a third stiffness of at least one of the inner diaphragm members is less than a fourth stiffness of the second outer diaphragm member.
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이 특허에 인용된 특허 (18)
Heydrich Hans (Phoenix AZ), Bidirectional finger seal.
Bouchard Joseph P. (Arundel ME) Long Merrell W. (North Waterboro ME), Method and apparatus for improving the airsealing effectiveness in a turbine engine.
Turnquist Norman Arnold ; Dinc Osman Saim ; Reluzco George Ernest ; Cornell Daniel Richard ; Cromer Robert Harold ; Robbins Kenneth Elmer ; Wolfe Christopher Edward, Steam turbine having a brush seal assembly.
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