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| Number | Title | Issue Date |
| 7963525 | Hydrodynamic circumferential seal system for large translations A circumferential seal system for sealing a high pressure region from a low pressure region separated by a runner with an outer circumferential surface and a seal ring disposed about the outer circumferential surface is described. The seal system includes a pluralit... | 06/21/2011 |
| 7770895 | Segmented seal portion and assembly A segment of a seal assembly for sealing a higher pressure area from a lower pressure area is disclosed. The segment comprises a radial external surface, a radial internal surface for sealing against a rotating member, a transverse groove for maintaining a pressure ... | 08/10/2010 |
| 7717433 | Dynamic seal assembly A dynamic seal assembly for a rotating member comprising a first split housing carrying a first split seal, a second split housing carrying at least one second split seal, each split seal being resiliently closed so that sealing contact is maintained when the rotati... | 05/18/2010 |
| 7631879 | “L” butt gap seal between segments in seal assemblies Disclosed herein is a seal assembly for a rotary machine having a plurality of arcuate segments and at least one seal. The plurality of arcuate segments are arrayed in an annulus and have butt joints, each of the arcuate segments has a radially outermost surface and... | 12/15/2009 |
| 7367567 | Low leakage finger seal A seal for an exhaust duct includes a metal mesh member sandwiched between an outer plate and an inner plate. The seal includes a plurality of flexible members defined by a plurality of slots in both the inner and outer plates. The flexible members provide for expan... | 05/06/2008 |
| 7287956 | Removable abradable seal carriers for sealing between rotary and stationary turbine components The turbine includes a diaphragm having a seal carrier mounted in opposition to seal teeth carried by the rotary component. The seal carrier includes a seal face having a coating of abradable material enabling the rotary component to abrade the material from the sea... | 10/30/2007 |
| 7252291 | Mechanical seal having a single-piece, perforated mating ring A mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) with reduced contact surface temperature, reduced contact surface wear, or inc... | 08/07/2007 |
| 7238001 | Seal arrangement The present invention relates to a seal arrangement in which a substantially labyrinth type seal is utilised between a rotating component and a stationary component such as a housing. An edged fin of the seal arrangement incorporates a slot nozzle or a slot nozzle i... | 07/03/2007 |
| 7216871 | Non-contacting seal for rotating surfaces A non-contacting seal for sealing in high temperature applications includes at least one segment having an inner pad with a hydrodynamic/hydrostatic lift-off geometry enabling the seal to run in a non-contact mode, and at least one finger spring supported on the pad... | 05/15/2007 |
| 7186074 | Axial flow stream turbines A drum-type rotor carries an annular row of moving blades having root portions held within a slot in the periphery of the rotor. A turbine casing surrounds the rotor and carries a static blade assembly with an annular row of static blades which, together with the an... | 03/06/2007 |
| 7168708 | Brush seal designs for turbines and similar rotary apparatus A seal segment for a turbine is provided having labyrinth teeth and a brush seal disposed along the labyrinth teeth. A plurality of the segments for a seal ring. The segments are separable from each other so that the seal can retract. Each segment has two ends, each... | 01/30/2007 |
| 7152864 | Seal assembly It is disclosed a seal assembly (5) which comprises a layered structure. It consists of a first layer (9, 12) of a base material, a second layer (10) of thermal insulating material on top of the base material and a third layer (11, 12) of... | 12/26/2006 |
| 7125223 | Method and apparatus for turbomachine active clearance control An apparatus for providing active clearance control between blade tips and seals in a turbomachine comprising: a first stator carrier segment, with stator seals centripetally disposed on it; a second stator carrier segment located along a same circumference as the f... | 10/24/2006 |
| 7066470 | Active seal assembly A seal assembly includes an annular hanger having a supporting ledge. An arcuate seal segment includes an outer rail mounted on the ledge and supporting an inner seal. An arcuate carrier is mounted between the hanger and the rail, and includes a piston mounted in a ... | 06/27/2006 |
| 7032903 | Brush-seal designs for turbines and similar rotary apparatus A seal segment for a turbine is provided having labyrinth teeth and a brush seal disposed along the labyrinth teeth. A plurality of the segments for a seal ring. The segments are separable from each other so that the seal can retract. Each segment has two ends, each... | 04/25/2006 |
| 7004475 | Flow dam design for labyrinth seals to promote rotor stability A method and apparatus for reducing steam swirl in a steam turbine. A plurality of seal segments (14) are circumferentially juxtaposed to form a seal ring (12) encircling the turbine shaft (10), each seal segment (14) supporting a plurali... | 02/28/2006 |
| 6976680 | Shaft seal structure and turbine The shaft seal structure is based on a leaf seal that includes springs, disposed between the stator blades and the leaf seal ring, to force the leaf seal ring away from the rotation shaft, and pressure guiding grooves for guiding the fluid pressure, through a bounda... | 12/20/2005 |
| 6962482 | Turbine shroud segment A shroud segment for being incorporated in a gas turbine engine having a turbine case and a rear turbine case connected with a rear end of the turbine case so as to suppress influence of hot combustion gas on the turbine case and the rear turbine case, is provided w... | 11/08/2005 |
| 6935634 | Steam turbine packing spring A packing spring for a steam turbine comprising a flat, elongated spring body of specified length, width and thickness dimensions; a flange at one end of the main spring body; and at least one bend in the main spring body, located substantially midway along the leng... | 08/30/2005 |
| 6932350 | Windback labyrinth seal that accommodates a pressure differential for rotating shafts A segmented labyrinth seal (10) having a windback configuration formed around a rotatable shaft for preventing leakage of oil from a bearing housing having a first face (22) and a second face (23). An exterior cylindrical surface (19) and... | 08/23/2005 |
| 6811154 | Noncontacting finger seal An annular finger seal is adapted to be interposed between a high pressure upstream region and a lower pressure downstream region to provide noncontact sealing along a rotatable member. The finger seal comprises axially juxtaposed downstream and upstream finger elem... | 11/02/2004 |
| 6805356 | Brush seal and brush seal device One brush seal unit is piled on another one in such a manner that thin beams of the one brush seal unit overlap the slits of the another brush seal unit easily using their positioning sections in order to improve sealing ability. The pitches at the positioning secti... | 10/19/2004 |
| 6742783 | Seal segment for a turbine A seal segment (66) as described for a seal segment ring (64) of a turbine (16) in a gas turbine engine (10). The seal segment (66) has an inner surface (70) adapted to face the turbine blades (36) in use. Path means ... | 06/01/2004 |
| 6722850 | Endface gap sealing of steam turbine packing seal segments and retrofitting thereof Spline seals are disposed in circumferentially registering slots of adjacent arcuate sealing segments disposed in grooves of the casing of a steam turbine about a rotor. The spline seals extend in the gap between the endfaces of the segments and minimize or preclude... | 04/20/2004 |
| 6715766 | Steam feed hole for retractable packing segments in rotary machines A packing segment for an annular seal ring assembly for use in a hot gas path of a turbomachine, includes a sealing face mounting a plurality of axially spaced sealing teeth; a necked-in center portion radially outward of the sealing face; and a mounting portion rad... | 04/06/2004 |
| 6695316 | Apparatus and methods for supporting a retractable packing ring A rotary machine has stationary upper and lower housings with circumferential grooves and a rotatable component, as well as annular sealing segments movable toward and away from the rotating components between large and small clearance positions. To preve... | 02/24/2004 |
| 6651986 | Retractable packing ring lower half segment retaining key and method for retaining retractable packing ring lower half segment A rotary machine has a stationary component with circumferential grooves and a rotatable component, as well as annular packing or sealing ring segments movable toward and away from the rotating component. To prevent circumferential displacement of the low... | 11/25/2003 |
| 6648332 | Steam turbine packing casing horizontal joint seals and methods of forming the seals Spline seals are formed at the joints between packing casing shells in a steam turbine having high pressure and intermediate pressure turbine sections sealing between the high pressure and intermediate pressure regions on opposite axial sides of the packi... | 11/18/2003 |
| 6637751 | Supplemental seal for the chordal hinge seals in a gas turbine In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner band of the nozzle segment... | 10/28/2003 |
| 6637752 | Supplemental seal for the chordal hinge seal in a gas turbine In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of the nozzle segment... | 10/28/2003 |
| 6637753 | Supplemental seal for the chordal hinge seals in a gas turbine In a gas turbine having a chordal hinge seal between an inner rail of each nozzle segment and an annular axially facing sealing surface of a nozzle support ring, a supplemental seal is disposed between the support ring and inner rail of each nozzle segmen... | 10/28/2003 |
| 6588764 | Segmented labyrinth seal assembly and method A segmented labyrinth seal assembly and method according to which a plurality of arcuate segments extend around a rotating shaft with the shaft being engaged by a sealing portion of each segment, thus sealing against the movement of fluid in an axial dire... | 07/08/2003 |
| 6572114 | Seal ring for steam turbine A seal ring provided between a rotating portion and a fixed portion in a rotating machine of steam turbine and the like is improved to accurately carry out predetermined movement so as to not cause deterioration of sealing performance. The seal ring is sp... | 06/03/2003 |
| 6572115 | Actuating seal for a rotary machine and method of retrofitting A seal assembly is provided for a rotary machine wherein the rotary machine comprises a rotor and a casing. The rotor comprises a generally longitudinally-extending axis. The casing is generally coaxially aligned with the axis. The casing circumferentiall... | 06/03/2003 |
| 6502823 | Actuating seal carrier for a turbine and method of retrofitting A seal assembly is provided for a rotary machine wherein the rotary machine comprises a rotor and a casing. The rotor comprises a generally longitudinally-extending axis wherein the casing is generally coaxially aligned with the axis. The casing circumfer... | 01/07/2003 |
| 6471213 | Seal structure for gas turbine A seal ring separating surface for a gas turbine, which sets a shape of an end portion in the separation surface to a cutting surface and reduces the leaking amount of sealing air. A seal ring holding ring (1) fixes brush seals (3, 4) on an upstream side ... | 10/29/2002 |
| 6460857 | Brush seal segment end bristle protection and flexibility maintenance device and methods of forming the segment A brush seal segment includes a plurality of bristles disposed between a pair of backing plates. The bristles are welded to one another adjacent their proximal ends and to the edges of the backing plates remote from the bristle tips. An end plate is welde... | 10/08/2002 |
| 6367806 | Seal arrangement for a rotary machine such as a turbine A seal arrangement for a rotary machine, such as a turbine, includes a main seal segment such as a labyrinth seal segment, a brush seal segment disposed in a slot in the main seal segment and having a layer of bristles secured between upstream and downstr... | 04/09/2002 |
| 6318728 | Brush-seal designs for elastic fluid turbines Disclosed are improved spillstrip and packing rings, and packing ring segments employing novel brush elements for use in forming seals in axial flow elastic fluid machines, and compressor and turbine machines containing the same.... | 11/20/2001 |
| 6250640 | Brush seals for steam turbine applications A number of sealing segments 20 mounts a brush seal about a rotor. The tips of the brush seal 46 are maintained out of contact with the rotor surface throughout the entire operating range of the turbomachinery. Thus, the increase in temperature resultant ... | 06/26/2001 |
