A seal apparatus for a rotary machine, including a plurality of sealing assembly segments surrounding a rotor element which is mounted for rotation about a longitudinal axis and has an outer surface. Each of the segments includes a shoe with one or more labyrinth teeth facing the outer surface and a
A seal apparatus for a rotary machine, including a plurality of sealing assembly segments surrounding a rotor element which is mounted for rotation about a longitudinal axis and has an outer surface. Each of the segments includes a shoe with one or more labyrinth teeth facing the outer surface and a shoe plate disposed downstream of the one or more labyrinth seal teeth and configured to generate an aerodynamic force between the shoe plate and the outer surface of the rotor element. The shoe is further configured to be flexible in a radial-axial plane in response to fluid film forces generated by interaction of the sealing assembly segment and the rotor element, and an axially-oriented beam spring connects the shoe to a stationary seal body.
대표청구항▼
1. A seal apparatus for a rotary machine, comprising: a rotor element which is mounted for rotation about a longitudinal axis and has an outer surface;a plurality of sealing assembly segments surrounding the rotor element, each of the segments comprising:a shoe including: one or more labyrinth seal
1. A seal apparatus for a rotary machine, comprising: a rotor element which is mounted for rotation about a longitudinal axis and has an outer surface;a plurality of sealing assembly segments surrounding the rotor element, each of the segments comprising:a shoe including: one or more labyrinth seal teeth facing the outer surface, the one or more labyrinth seal teeth terminating a small, predetermined distance from the outer surface and not contacting the outer surface, and an inner lip disposed at a distal end of the shoe and oriented perpendicular to the one or more seal teeth; anda shoe plate axially spaced from and disposed downstream of the one or more labyrinth seal teeth, the shoe plate not contacting the outer surface and being configured to generate an aerodynamic force between the shoe plate and the outer surface of the rotor element, wherein the shoe is further configured to be flexible in a radial-axial plane in response to fluid film forces generated by interaction of the sealing assembly segment and the rotor element;a stationary seal body, the seal body having forward and aft ends and an aft flange extending radially inwardly from the seal body near the aft end;an axially-oriented beam spring extending between an axially forward end and an axially rearward end, the beam spring having the axially rearward end joined to the aft flange and extending axially forward from the aft flange; anda beam interconnecting the shoe plate and the beam spring so as to prevent longitudinal tilting of the shoe plate, wherein the beam is axially-oriented, with a forward end joined to the axially forward end of the spring, and an aft end joined to the shoe plate, the beam extending generally parallel to the beam spring such that the beam and the beam spring collectively form a U-shape, wherein the beam, the shoe plate, and the beam spring are all part of a unitary whole. 2. The seal apparatus of claim 1 wherein the seal body comprises an annular array of segments. 3. The seal apparatus of claim 1 further including a secondary seal including a leaf contacting the seal body and the shoe at upstream ends thereof, so as to seal leakage therebetween while permitting relative movement of the seal body and the shoe. 4. A rotary machine apparatus, comprising: a rotor element mounted for rotation about a longitudinal axis, the rotor element having a cylindrical outer surface,an annular stationary seal body surrounding the rotor element, the seal body having forward and aft ends and an aft flange extending radially inwardly from the seal body near the aft end;an array of axially-oriented beam springs each extending between an axially forward end and an axially rearward end and further having the axially rearward end attached to the aft flange and extending axially forward from the aft flange;a shoe coupled to each of the beam springs, disposed between the rotor element and the seal body, each shoe comprising:an annular labyrinth seal tooth facing the outer surface, the annular labyrinth seal tooth terminating a small, predetermined distance from the outer surface, and an inner lip disposed at a distal end of the shoe and oriented perpendicular to the labyrinth seal tooth;a shoe plate axially spaced from and disposed downstream of the labyrinth seal tooth, the shoe plate not contacting the outer surface and being configured to generate an aerodynamic force between the shoe plate and the outer surface, wherein the shoe is further configured to be flexible in a radial-axial plane in response to fluid film forces generated by interaction of the shoe plate and the rotor element; anda beam interconnecting the seal tooth and the shoe plate so as to prevent longitudinal tilting of the shoe plate, wherein the beam is axially-oriented, with a forward end joined to the axially forward end of the spring, and an aft end joined to the shoe plate, the beam extending generally parallel to the beam spring so that the beam and the beam spring form a U-shape, wherein the beam, the shoe plate, and the beam spring are all part of a unitary structure. 5. The apparatus of claim 4 wherein the seal body comprises an annular array of segments. 6. The apparatus of claim 4 further including a secondary seal including a leaf contacting the seal body and the shoe at upstream ends thereof, so as to seal leakage therebetween while permitting relative movement of the seal body and the shoe. 7. The apparatus of claim 4 wherein: the outer surface includes a forward second and an aft section, with an aft-facing step defined therebetween;the labyrinth tooth is disposed opposite the forward section; andthe shoe plate is disposed opposite the aft section.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (35)
Dinc, Osman Saim; Demiroglu, Mehmet; Sarshar, Hamid Reza; Gladen, Paul; Hochhalter, Keith, Actuating mechanism for a turbine and method of retrofitting.
Fang, Biao; Turnquist, Norman Arnold; Sarshar, Hamid Reza; Aksit, Mahmut Faruk; Burnett, Mark Edward; Baily, Frederick George; Demiroglu, Mehmet, Seal carrier for a rotary machine and method of retrofitting.
Nakano,Takashi; Shirai,Hirokazu; Asada,Toshio; Nishimoto,Shin; Shinohara,Tanehiro; Uehara,Hidekazu, Shaft seal mechanism, shaft seal mechanism assembling structure and large size fluid machine.
Turnquist, Norman Arnold; Awtar, Shorya nmn; Gursoy, Mustafa; Varadarajan, Kartik Mangudi, Spring system designs for active and passive retractable seals.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.