Brush Seal Patents (Class 277/355)
  • Publication number: 20130062834
    Abstract: An annular brush seal is disclosed including first and second annular clamp plates, each clamp plate including an opposed annular clamping surface, and a pack of radially extending bristles clamped between the clamping surfaces of the clamp plates. The clamping surface of at least one of the clamp plates is profiled, such that a separation between the clamping surfaces increases with decreasing radius. A brush seal is also disclosed including first and second clamp plates, each clamp plate including an opposed clamping surface, and a bristle pack clamped between the clamping surfaces of the clamp plates, wherein the clamping surface of at least one of the clamp plates includes a linear surface feature extending across the clamping surface and causing a step change in the profile of the clamping surface.
    Type: Application
    Filed: August 22, 2012
    Publication date: March 14, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: Gervas FRANCESCHINI
  • Patent number: 8393859
    Abstract: A card seal with an annular arrangement of cards that form the card seal, where the cards are interweaved and staggered to increase a sealing capability of the cards. The card seal is formed from leading edge cards staggered with trailing edge cards, and the cards have a thicker outer end and a thinner inner end where the interweaving occurs. Because of the varying thickness of the staggered cards, each card has a taper on the lower outer end that decreases from a high to a low on the inner side in order that a foot print for the card is constant across the bottom surface that floats on the rotating part.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: March 12, 2013
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Daniel R Dillon
  • Patent number: 8382119
    Abstract: A shaft seal serves to reduce leakage between a rotating shaft and a static shell. The shaft seal includes a plurality of compliant plate members, each having a root and a tip. The compliant plate members are secured to one of the static shell and the rotating shaft at their root in facing relation. The tips of the compliant plate members define a sealing ring between the static shell and the rotating shaft. An axial flow resistance member is disposed within the compliant plate members and serves as a harrier to axial leakage flow between the compliant plate members.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: February 26, 2013
    Assignee: General Electric Company
    Inventors: Shorya Awtar, Nikhil Kumar Verma
  • Patent number: 8382120
    Abstract: A seal assembly for a turbomachine includes a plurality of compliant plate members attached to an interior surface of a stationary housing. The compliant plate members define a sealing ring between the stationary housing and a rotor. Each of the compliant plate members comprises at least one slot therein. The seal assembly further includes at least one arcuate static ring attached to the interior surface of the stationary housing and extending radially into the at least one slot in the compliant plate members. Each of the at least one static ring extends circumferentially through and between a plurality of the compliant plate members. Finally, the seal assembly includes a vibration damper disposed adjacent to or provided on the plurality of compliant plate members. The vibration damper is configured to dampen vibration of the plurality of compliant plate members.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: February 26, 2013
    Assignee: General Electric Company
    Inventors: Hrishikesh Vishvas Deo, Norman Arnold Turnquist, Farshad Ghasripoor, William Edward Adis
  • Publication number: 20130042456
    Abstract: A self-lubricating brush seal assembly, for a power generation system and method of reducing air leakage in a power generation system including a plurality of self-lubricating members is provided. The plurality of self-lubricating members include a plurality of self-lubricating bristles, a plurality of cores sheathed in a self-lubricating braid, a plurality of cores having an outer diameter coated with self-lubricating material and a solid lubricating pack. The lubricating material is selected from graphite, hexagonal-boron nitrite (hBN), molybdenum disulfide (MoS2), tungsten disulfide (WS2), titanium nitride (TiN), titanium aluminum nitride (TiAlN), titanium carbonitride (TiCN), and combinations thereof.
    Type: Application
    Filed: August 17, 2011
    Publication date: February 21, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Krishnamurthy ANAND, Surinder Singh PABLA, Sundar AMANCHERLA, Paul MATHEW
  • Publication number: 20130043658
    Abstract: A brush seal assembly is provided, including a sealing surface, a side plate, a backing plate, a plurality of bristles, and a biasing member. The backing plate is selectively located in a stationary position and has at least one backing tooth and a backing tip. The backing tooth has a tooth surface and the backing tip has a tip surface. A tooth clearance is measured between the tooth surface and the sealing surface. A tip clearance is measured between the tip surface and the sealing surface. The tooth clearance is less than the tip clearance. The bristles are located between the side plate and the backing plate. The bristles include an end portion for sealing to the sealing surface. The biasing member exerts a biasing force upon the backing plate in a direction towards the sealing surface. The backing tooth is configured for selectively contacting the sealing surface.
    Type: Application
    Filed: August 15, 2011
    Publication date: February 21, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, Hemant Vinayak Gedam
  • Patent number: 8376367
    Abstract: A brush seal and a method for mounting a brush seal is disclosed. The brush seal includes a sealing element provided with a plurality of filaments or wires that are joined at a filament or wire end to form a filament or wire bundle and a clamp-like sealing housing for receiving and fixing the filament or wire end between a first and a second limb and for fixing the brush seal in a mounting recess of a housing. A free end of the filament or wire bundle of the sealing element is clamped between a partial area of an inner contour of the second limb that is adjacent to a region of an outlet opening of the mounting recess of the housing and an area of the outlet opening that is opposite from the partial area.
    Type: Grant
    Filed: January 20, 2009
    Date of Patent: February 19, 2013
    Assignee: MTU Aero Engines GmbH
    Inventor: Stefan Beichl
  • Publication number: 20130038022
    Abstract: According to one aspect of the invention, a seal assembly includes a mounting structure coupled to an inner static structure in a turbine. Further, the seal assembly includes a brush seal member coupled to the mounting structure, wherein the brush seal member includes a first end that is in sealing contact with a rotor and a second end in sealing contact with a stator and wherein the brush seal member includes a plurality of bristles.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 14, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Karimulla Shaik Sha
  • Patent number: 8366115
    Abstract: A brush seal includes a plurality of bristles aligned in parallel to form a brush pack having a first end and a second end, and a joint securing the brush pack together. The joint is located centrally between the first end and the second end such that both the first end and the second end of the brush pack can form a sealing surface.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: February 5, 2013
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Publication number: 20130022459
    Abstract: A seal assembly for a rotary machine is provided. The seal assembly includes multiple sealing device segments disposed intermediate to a stationary housing and a rotor. Each of the segments includes at least one plate and a sealing element. The seal assembly also includes multiple inter-segment gaps formed between the multiple sealing device segments. Further, for each pair of adjacent sealing device segments, at least one pair of adjacent plates includes one plate overlapping another plate at an inter-segment gap.
    Type: Application
    Filed: July 18, 2011
    Publication date: January 24, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Omprakash Samudrala, Christopher Edward Wolfe, Raymond Edward Chupp
  • Publication number: 20130020770
    Abstract: This invention relates to a method to improve the performance of standard brush seals for rotating shafts. This invention relates to a design that will lower manufacturing costs associated with standard brush seals for rotating shafts. This invention relates to a design that will improve wear characteristics of a standard brush seal. Specifically, the invention is intended to reduce manufacturing costs by combining the standard sealing element of a brush seal with the low cost materials and manufacturing methodologies of a carbon seal. Specifically, the invention is intended to lower the overall weight of the brush seal assembly, thereby improving the life of the brush sealing element and reducing the wear characteristics on both the seal element and the associated shaft.
    Type: Application
    Filed: July 18, 2011
    Publication date: January 24, 2013
    Inventors: Jimmie Wade Hamilton, Marc Wilburn Hickham, James Wallace Greene
  • Publication number: 20130001883
    Abstract: A brush seal includes a plurality of bristles aligned in parallel to form a brush pack having a first end and a second end, and a joint securing the brush pack together. The joint is located centrally between the first end and the second end such that both the first end and the second end of the brush pack can form a sealing surface.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 3, 2013
    Applicant: UNITED TECHNOLOGIES CORPORATION
    Inventor: Mark E. Addis
  • Publication number: 20120326393
    Abstract: A seal is provided having a bristle pack with a first layer of bristles and a second layer of bristles. The bristle pack has at least one segment end. The first layer of bristles is configured to substantially surround the second layer of bristles, and at least one of the first layer of bristles has a first diameter. The second layer of bristles are located substantially in a center portion of the bristle pack, and at least one of the second layer of bristles has a second diameter. The first diameter is larger than the second diameter, and the first layer of bristles located near the at least one segment end are configured to protect the second layer of bristles located near the at least one segment end.
    Type: Application
    Filed: June 27, 2011
    Publication date: December 27, 2012
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, JR., Michael John Bowman, William Edward Adis, Michael Dennis Mack, Kim James Clark
  • Publication number: 20120326392
    Abstract: A brush seal is provided having a brush housing having a back plate and a front plate, a first layer of bristles disposed adjacent to the back plate, where at least one of the first layer of bristles has a first diameter. A second layer of bristles are disposed adjacent to the first layer of bristles, and at least one of the second layer of bristles has a second diameter. A third layer of bristles are disposed adjacent to the second layer of bristles, and at least one of the third layer of bristles has a third diameter. The first diameter and the third diameter are larger than the second diameter.
    Type: Application
    Filed: June 27, 2011
    Publication date: December 27, 2012
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, JR., Michael John Bowman, William Edward Adis, Michael Dennis Mack, Kim James Clark
  • Patent number: 8333239
    Abstract: A burner with a casing seal is used to create a combustion cavity at a temperature sufficient to reservoir sand. The burner creates and sustains hot combustion gases at a steady state for flowing into and permeating through a target zone. The casing seal isolates the combustion cavity from the cased wellbore and forms a sealed casing annulus between the cased wellbore and the burner. Water is injected into the target zone, above the combustion cavity, through the sealed casing annulus. The injected water permeates laterally and cools the reservoir adjacent the wellbore, and the wellbore from the heat of the hot combustion gases. The hot combustion gases and the water in the reservoir interact to form a drive front in a hydrocarbon reservoir.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: December 18, 2012
    Assignee: Resource Innovations Inc.
    Inventors: Fred Schneider, Lynn P. Tessier
  • Patent number: 8328198
    Abstract: A brush seal and brush seal segment for use in a rotary device are provided. In one embodiment, the invention provides a brush seal comprising: a plurality of brush seal segments, each segment including: an arcuate fence; an arcuate backplate substantially circumferentially coextensive with the arcuate fence, the arcuate backplate including a first end and a second end; and a plurality of brush seal bristles between the arcuate backplate and the arcuate fence, the plurality of brush seal bristles being angled with respect to a radial axis of the arcuate backplate and at least one of the first end and the second end of the arcuate backplate; and a static member to which at least one of the plurality of brush seal segments is affixed.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: December 11, 2012
    Assignee: General Electric Company
    Inventors: William Edward Adis, Xiaoqing Zheng, Bernard Arthur Couture, Michael Dennis Mack
  • Patent number: 8317464
    Abstract: A reverse flow tolerant brush seal arrangement for restricting the transfer of a pressurized fluid between a first and a second chamber along a moving shaft. Opposing backing plates are provided to stiffen brush bristle alignment on the moving shaft. Differential pressure between the chambers is aided by spring biasing to seat axial movement of a sliding brush seal against one of the opposing backing plates for stiffening to maintain a design clearance with a shaft being sealed.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: November 27, 2012
    Assignee: General Electric Company
    Inventors: Rakesh V. Alamsetty, William E. Adis, Mahendra S. Mehra, Nestor Hernandez Sanchez, Rajasekar Natarajan, Akshay A. Datye
  • Publication number: 20120286476
    Abstract: The present application thus provides a retractable seal system for use between a high pressure side and a low pressure side of a turbine engine. The retractable seal system may include a seal positioned in a slot of a stationary component, a pressure balance pocket positioned about the seal, and a conduit in communication with the pressure balance pocket and the high pressure side.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Omprakash Samudrala, Siddarth Kumar, Gregory Crum, Karimulla Shaik Sha
  • Publication number: 20120288361
    Abstract: A brush seal for use between a rotating component and a stationary component in a turbomachine is disclosed. The brush seal according to embodiments of this invention includes a set of bristles having a fixed end and a free end, wherein the fixed end is attached to the rotating component with a mechanical clamping element and the free end extends towards the stationary component, and wherein the set of bristles are angled axially at an axial angle with respect to the rotating component. In one embodiment, the fixed end of the set of bristles are wrapped at least partially around a core element and the clamping element partially surrounds the core element and the fixed end of the set of bristles, wherein the clamping element secures the fixed end of the set of bristles within a circumferential groove in the rotating component.
    Type: Application
    Filed: July 20, 2012
    Publication date: November 15, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Guoqiang Lu, Mehmet Demiroglu, Binayak Roy, Deepak Trivedi, Xiaoqing Zheng
  • Publication number: 20120251290
    Abstract: An aspirating face seal includes a primary seal, a secondary seal, and a biasing device. The primary seal includes a first seal component and a second seal component. The first seal component is configured to be coupled to a rotor and rotatable with the rotor. The secondary seal includes a plurality of flexible elements and configured to be disposed between the second seal component and a stator housing. A biasing device is coupled to the second seal component such that the second seal component is biased along an axial direction away from the first seal component during a non-operating condition.
    Type: Application
    Filed: March 31, 2011
    Publication date: October 4, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Norman Arnold Turnquist, Rodrigo Rodriguez Erdmenger, Xiaoqing Zheng, Robbert Christiaan Pannekeet, Keith Michael Parker
  • Publication number: 20120251303
    Abstract: A brush seal for use between a rotating component and a stationary component in a turbomachine is disclosed. The brush seal according to embodiments of this invention include a set of bristles having a fixed end and a free end, wherein the fixed end is attached to the rotating component, and wherein the set of bristles are angled axially with respect to the rotating component.
    Type: Application
    Filed: March 28, 2011
    Publication date: October 4, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, William Edward Adis, Bernard Arthur Couture, JR., Michael Dennis Mack, Kristan Brice Sears
  • Patent number: 8272644
    Abstract: A card seal with an annular arrangement of leaf elements, where each leaf element has a T shape with an upper ear section and a leaf section extending from the ear section. the leaf elements each include a first raised portion and a second raised portion that form a cross, the raised portions allowing for air to pass to bend ends on the leaf sections to form a floating air seal and to limit leakage flow across the leaf elements from one side to the opposite side.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: September 25, 2012
    Assignee: Florida Turbine Technologies, Inc.
    Inventors: Wilho V Aho, Jr., Jack W Wilson, Jr., Vincent P Laurello
  • Patent number: 8265715
    Abstract: There are a first packing 31 and a second packing 32 for covering and sealing a first opening portion 11a and a second opening portion 12a other than a groove portion 31a and a groove portion 32a for leading an FPC 20. The first packing 31 and the second packing 32 wipe surfaces of the FPC 20 corning in and going out of the groove portion 31a and the groove portion 32a by sliding operation of a second frame 12.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: September 11, 2012
    Assignee: NEC Corporation
    Inventor: Takehiko Komiyama
  • Patent number: 8256575
    Abstract: Methods and systems for reducing a flow of ambient air into a bearing lubricating oil system are provided. The system includes a lubricating oil bearing cover that is stationary with respect to the bearing wherein the bearing is configured to support a portion of a rotatable machine shaft. The cover includes a first end cap extending radially inwardly towards the shaft such that a cavity surrounding the bearing is formed by the cover and the first end cap and a set of seal rings positioned substantially concentric with the shaft and forming a seal against lubricating oil flow. The seal rings include a plurality of wire bristles extending radially inwardly from the end cap wherein the wire bristles are configured to extend to a surface of the shaft when assembled and the bristles are configured to present a tortuous flow path to gas infiltrating the cavity.
    Type: Grant
    Filed: August 22, 2007
    Date of Patent: September 4, 2012
    Assignee: General Electric Company
    Inventor: Nathan Robert Berberich
  • Patent number: 8250756
    Abstract: A compliant plate seal arrangement manufacturing method is provided. A compliant plate seal manufacturing method includes assembling a plurality of t-shims and a plurality of spacer shims into a straight weld fixture, thereby forming a shim pack having a front and rear end and sides, welding the sides of the shim pack to a top plate, removing a portion of the weld fixture, removing the plurality of spacer shims, shaping the shim pack into a target diameter, and applying a radial flow plate to the leaf pack.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: August 28, 2012
    Assignee: General Electric Company
    Inventors: William Edward Adis, Bernard Arthur Couture, Jr., Hrishikesh Vishvas Deo, Sean Douglas Feeny, Michael Dennis Mack, Daniel Frederick Purdy, Norman Arnold Turnquist
  • Patent number: 8235392
    Abstract: The invention relates to a sealing arrangement for a non-hermetic seal of a gap (11) between a stator and a rotor with a brush seal (13), wherein the brush seal (13) has a bristle package (14) with several bristles (15), the bristles are wound about a core element (16) and fixed to the core element (16), wherein the brush seal (13) is disposed at least sectionally in an accommodating space, which is bounded by a supporting element (18) and a covering element (19), and wherein the bristles (15) have sealing bristle sections (21), which are at an angle to the bristle shafts (20) and the ends of which run against a sealing surface (22) of the rotor (12). According to the invention, the covering element (19) has a support surface (23) at an end adjacent to the sealing bristle sections (21), wherein the supporting surface (23) contacts the bristle shafts (20) in a defined, locally limited region, so that the radial mobility of the sealing bristle sections (21) is limited in the direction of the rotor (12).
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: August 7, 2012
    Assignee: MTU Aero Engines GmbH
    Inventors: Alfons Gail, Wilhelm Gräbeldinger, Alexander Rauschmeier
  • Publication number: 20120195741
    Abstract: A brush seal assembly for turbomachinery having a rotor can include a stationary seal component, a floating seal component coupled to the stationary seal component and circumferentially angled bristles arranged in a bristle pack, disposed in the floating seal component and extended axially with respect to the rotor.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Neelesh Nandkumar Sarawate, Norman Arnold Turnquist, William Edward Adis, Robert Gerard Baran, Rodrigo Rodriguez Erdmenger, Robbert Christiaan Pannekeet, Keith Michael Parker, Xiaoqing Zheng
  • Patent number: 8231340
    Abstract: A leaf seal 10 in a rotary machine is located between a higher pressure region 14 and a lower pressure region 16 of the machine. Blow-down forces are greater on the lower pressure side 16 of the leaf seal 10 than on its higher pressure side 14, resulting in greater inward deflection of the leaves 20 on the lower pressure side of the seal than on its higher pressure side, leading in turn to greater wear of the leaves and the contacting rotor surface 44 on the lower pressure side 16 of the seal. To counteract this, the free ends 36 of the leaves 20 can be given a tapered profile 42 to gradually reduce the length of each leaf 20 over its width ‘w’ from its higher pressure side 14 to its lower pressure side 16, so that the leaves 20 are free to deflect under the blow-down forces by the amount of their reduction in length (a maximum of ‘x’), before they contact the rotor surface.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: July 31, 2012
    Assignee: ALSTOM Technology Ltd.
    Inventor: Neil Howes
  • Publication number: 20120187635
    Abstract: A brush seal assembly including a pair of annular plates defining an annular slot between them and a radially outer chamber opening into the slot; and an annular brush seal having bristles and an enlarged portion at its outer periphery formed by welding the bristles together, the brush seal extending through the slot with its enlarged portion retained in the chamber wherein at least a portion of one of the plates has an extension thereof which is deformed over the other plate to hold the plates together to form the assembly characterised in th at one of the plates has a flat face in the region of the slot.
    Type: Application
    Filed: March 29, 2012
    Publication date: July 26, 2012
    Inventor: Peter Francis Crudgington
  • Publication number: 20120177483
    Abstract: A system includes a brush seal segment. The brush seal segment includes a movable support including a head, an extension, and a seal surface, wherein the head is configured to mount in a chamber. The brush seal segment also includes a brush coupled to the movable support along the seal surface, wherein the seal surface consists essentially of the brush. The brush seal segment also includes a biasing element coupled to the movable support, wherein the biasing element is configured to bias the movable support from a first position to a second position to increase a brush clearance in a space between the brush and a rotor, and the movable support is configured to move from the second position to the first position to decrease the brush clearance in response to a fluid flow from the space to the chamber.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 12, 2012
    Applicant: General Electric Company
    Inventors: Sulficker Ali, Saravana Bhava T., Seshu Kumar Mahankali, Xiaoqing Zheng
  • Patent number: 8205889
    Abstract: A method for assembling a rotary machine is provided. The method includes providing at least one seal assembly that includes at least one annular seal housing defined by a top wall, a front wall, and a rear wall, that are connected together such that a cavity is defined within the housing, coupling a plurality of flexible plates within the cavity such that the plates are axially-spaced from the front wall and the rear wall within the cavity, coupling at least one side plate to the at least one annular seal housing such that the at least one side plate is moveable with respect the front wall and the rear wall, and coupling the at least one sealing assembly within a rotary machine to facilitate sealing between a rotary component and a stator component.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: June 26, 2012
    Assignee: General Electric Company
    Inventors: Nikhil Kumar Verma, Jason Paul Mortzheim, Yogesh Sathe, Hrishikesh Vishvas Deo
  • Patent number: 8191898
    Abstract: A brush seal assembly including a pair of annular plates defining an annular slot between them and a radially outer chamber opening into the slot; and an annular brush seal having bristles and an enlarged portion at its outer periphery formed by welding the bristles together, the brush seal extending through the slot with its enlarged portion retained in the chamber wherein at least a portion of one of the plates has an extension thereof which is deformed over the other plate to hold the plates together to form the assembly characterized in that one of the plates has a flat face in the region of the slot.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: June 5, 2012
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventor: Peter Francis Crudgington
  • Publication number: 20120126484
    Abstract: The invention concerns a system for providing a seal between two volumes (V1, V2) delimited by a part (2A) mounted to rotate about an axis (A) and a stator (6), said system (S) including an annular brush seal (7) that comprises: a brush body (8) pivotally mounted in the stator; and fibers (10) fixed to the brush body and inclined at an angle ? relative to a plane (P) orthogonal to the rotation axis (A), wherein it includes means (11, 12) for adjusting the angle ? of the fibers (10) so as to be able to adjust precisely the clearance between the free end (10A) of the fibers and the rotary part (2A).
    Type: Application
    Filed: November 18, 2011
    Publication date: May 24, 2012
    Applicant: SNECMA
    Inventors: Nelson DOS SANTOS, Dominik Igel, Gérard Philippe Gauthier
  • Patent number: 8181965
    Abstract: The present invention relates to replaceable brush seal assemblies for use with turbines such as industrial gas turbines. In accordance with the present invention, a brush seal assembly comprises a flange, a brush seal mounted to the flange, and retainers preventing rotation of the brush seal relative to the flange. A method of repairing a brush seal having a back plate, side plate, and bristles is also disclosed. The method comprises the steps of removing the side plate and the bristles from the back plate, and securing a second brush seal to the back plate.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: May 22, 2012
    Assignee: United Technologies Corporation
    Inventor: Mark E. Addis
  • Publication number: 20120104700
    Abstract: A brush seal is disclosed that may include a spring-ioaded seal arrangement configured to conform to a wide range of sealing diameters along the length of a rotor of a turbomachine. In particular, the brush seal may be manufactured with free ends configured to overlap and provide a finite amount of radially expandable/contractible play and yet maintain an effective seal. Consequently, the same brush seal design may be used in a range of locations along a rotor length without the need to specifically manufacture separate brush seals for each variance in dimension.
    Type: Application
    Filed: June 23, 2010
    Publication date: May 3, 2012
    Applicant: Dresser-Rand Company
    Inventors: David J. Peer, Robert E. Kunselman
  • Patent number: 8167313
    Abstract: A brush seal assembly and method for sealing a turbine machine rotary member relative to a stationary member circumscribing the rotary member. The seal assembly includes a first compliant seal component disposed at a radially inward region of the stationary member in rubbing contact with a surface of the rotary member. The seal assembly also includes at least one hard seal element formed integrally with a carrier of the first compliant seal component, located a specified axial distance from the first compliant seal component.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: May 1, 2012
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, Andrew Greif
  • Patent number: 8162323
    Abstract: A leaf seal arrangement is provided in which within a housing there are edge portions to inter associate with non parallel chamfer edges in leaf seal elements. In such circumstances, deflection of the leaf seal elements in an outward direction or inward direction relative to a rotating shaft creates variation in a control gap X, XX between the edges and the chamfer edge. Such increase or decrease in the control gap X, XX adjusts the aerodynamic radial force that is presented to the leaf seal elements whereby those elements can be more accurately maintained at a desired leaf position for optimizing leakage while achieving better wear resistance performance.
    Type: Grant
    Filed: October 28, 2008
    Date of Patent: April 24, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Richard Nicholson, Terence Valentine Jones
  • Patent number: 8157266
    Abstract: A seal assembly for a regenerative heat exchanger can include a sealing member with a mounting base and a flexible contact portion having a contact edge that resiliently contacts a sector plate of the heat exchanger housing when the seal assembly is mounted to the heat exchanger. The seal assembly can also include a curvilinear support with a mounting section and a curved extended portion attached to the mounting section and having a predetermined curvature that gradually contacts the flexible contact portion as flexion of the flexible contact portion is increased, thereby gradually moving a flex point of the flexible contact portion toward the contact edge of the curvilinear support and gradually increasing a spring constant of the unsupported end of the flexible contact portion to resist further flexion of the flexible contact portion.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: April 17, 2012
    Assignee: Paragon Airheater Technologies, Inc.
    Inventors: Frank Klisura, Stephan Hastings
  • Publication number: 20120086172
    Abstract: A brush seal and brush seal segment for use in a rotary device are provided. In one embodiment, the invention provides a brush seal comprising: a plurality of brush seal segments, each segment including: an arcuate fence; an arcuate backplate substantially circumferentially coextensive with the arcuate fence, the arcuate backplate including a first end and a second end; and a plurality of brush seal bristles between the arcuate backplate and the arcuate fence, the plurality of brush seal bristles being angled with respect to a radial axis of the arcuate backplate and at least one of the first end and the second end of the arcuate backplate; and a static member to which at least one of the plurality of brush seal segments is affixed.
    Type: Application
    Filed: October 6, 2010
    Publication date: April 12, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoqing Zheng, William Edward Adis, Bernard Arthur Couture, JR., Michael Dennis Mack
  • Patent number: 8152462
    Abstract: A card seal with an annular arrangement of cards that are positioned within an annular groove of a casing, and a conical flexible seal is secured to the casing on the low pressure side of the cards. The cards and the flexible seal both includes slanted surfaces that interact during operation such that the flexible seal gap decreases with the rotor shaft and the cards are secured within the annular groove during assembly and installation of the card seal. The flexible seal blocks leakage through the cards and includes an axial extending inner end that can include an abradable material to allow for rub with the shaft while decreasing the gap to prevent leakage across the cards.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: April 10, 2012
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Gregory C Williams
  • Patent number: 8132815
    Abstract: A card seal with an annular arrangement of cards that form the card seal, where the cards each form an L-shape cross section with a wide front face and a narrow side face, where the side face has a constant width from a top end to a location greater than a mid-point, and from this point decreases in width to zero width at the bottom end. The side faces form a blockage against leakage flowing between adjacent cards in a cards seal assembly.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: March 13, 2012
    Assignee: Florida Turbine Technologies, Inc.
    Inventor: Daniel R Dillon
  • Patent number: 8118310
    Abstract: A brush seal including a bristle pack mounted in a holder, and having a free end for sealing with a member, a front plate for lying on a high pressure side of the seal and extending part way along the length of the bristle pack to a free end being spaced from the bristle pack characterized in that the front plate is formed for or carries a formation for reducing the influence of swirling fluid on the high pressure side on the bristle pack.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: February 21, 2012
    Assignee: Cross Manufacturing Company (1938) Limited
    Inventors: Peter Francis Crudgington, Aaron Bowsher
  • Publication number: 20120027582
    Abstract: A packing ring assembly for use between a rotating and a stationary component in a turbomachine is disclosed, the assembly including an arcuate packing ring casing, an arcuate packing ring segment positioned at least partially within the packing ring casing, and a resistance component configured to allow movement of the packing ring segment in an axial direction, relative to the rotating component, between a first and second position in response to a pressure condition. In one embodiment, the resistance component allows movement when the pressure condition comprises approximately 30% of the turbomachine load. Also disclosed is an altered surface topography of the rotating component to accommodate variable length teeth extending from the packing ring segment, such that when the packing ring segment is in the first position, a clearance between the packing ring segment and the rotating component is larger than when the packing ring segment is in the second position.
    Type: Application
    Filed: August 2, 2010
    Publication date: February 2, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rajasekar Natarajan, Rakesh Vamsi Alamsetty, Mahendra Singh Mehra, Nestor Hernandez Sanchez, Manikandan Srinivasan
  • Publication number: 20120025472
    Abstract: A labyrinth seal has a plurality of arcuate labyrinth seal segments 14 in which the confronting ends of adjacent arcuate labyrinth seal segments 14 have planar faces 26 which are oriented radially and axially but which are canted away from a strictly axial orientation 28 by a cant angle. A plurality of arcuate brush seal segments 16 may be retained in the plurality of arcuate labyrinth seal segments 14, thereby forming a combined labyrinth and brush seal.
    Type: Application
    Filed: May 19, 2011
    Publication date: February 2, 2012
    Inventors: Wilhelm Reiter, Christos Georgakis, Ivan Ramirez, Venkatesan Palaniappan
  • Publication number: 20120017594
    Abstract: A seal assembly (50, 60) for a gas turbine engine for controlling air flow between a diffuser (48) and rotor disks comprising first and second annular flange ends (52, 54) and an annular seal mid-section (56) between and operatively connected to the flange ends (52, 54). The first and second annular flange ends (52, 54) abut respective outer frame members (46) of the diffuser, whereby a fluid flow path is formed between the seal assembly (50, 60) and the rotor disks (42). The first and second end flanges (52, 54) are composed of a material having a coefficient of thermal expansion that is substantially the same as a coefficient of thermal expansion of the material of the outer frame members (46). In addition, the material of the seal mid-section (56) has a coefficient of thermal expansion that is different than that of the materials of the annular flange ends (52, 54) and outer frame members (46).
    Type: Application
    Filed: July 8, 2011
    Publication date: January 26, 2012
    Inventors: Christian Kowalski, Fan Zhang, Uwe Lohse, Robert W. Sunshine, Burkhard Voss
  • Patent number: 8100406
    Abstract: A gap 6 between a stationary component 2 and a rotating component 4 is sealed by means of a leaf seal comprising an array of leaves 8, 9. The leaves 8, 9 are disposed in pairs, comprising a higher curvature leaf 8 and a lower curvature leaf 9 which contact each other resiliently at their tips 12. The contact at the tips 12 provides a damping effect. As a result, the tips 12 of the leaves 8, 9 are relatively stable when subjected to an air flow F, enabling damaging flutter to be suppressed.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: January 24, 2012
    Assignee: Rolls-Royce PLC
    Inventor: Christopher Wright
  • Patent number: 8100404
    Abstract: In order to provide simpler manufacture and lift up and blow down control, leaf elements are provided which have profile edges arranged to associate with each other in order to create a ring carousel, either about the front or rear edge of a leaf seal arrangement. In such circumstances gas flow through the leaf seal arrangement encounters the profile edge in order to adjust leaf section position for appropriate sealing efficiency.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: January 24, 2012
    Assignee: Rolls-Royce PLC
    Inventor: David S Williams
  • Patent number: 8100405
    Abstract: A system for providing compliant rotating seals including a rotating portion that has one or more teeth extending radially from it, and a stationary portion that has a plurality of bristles extending radially from it. The one or more teeth rotatively engage the plurality of bristles creating a tortuous path between them that resists a leakage of gas or fluid through them.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: January 24, 2012
    Assignee: General Electric Company
    Inventors: Andrew Ray Kneeland, Eric David Roush
  • Patent number: 8082680
    Abstract: A shoe device secured to a syphon is disclosed for removing condensate from an internal surface of a rotating cylinder. The shoe device includes a shoe portion which is disposed adjacent to the internal surface of the rotating cylinder. The shoe portion defines a passageway having an upstream and a downstream end. The passageway permits a flow there through of the condensate from the internal surface of the rotating cylinder, through the upstream end of the passageway to the downstream end of the passageway. The shoe portion has a first and a second side, a surface extending between the first and second sides of the shoe portion. The surface is disposed adjacent to the internal surface of the cylinder. The shoe portion also has a leading and a trailing end and a face extending between the leading and trailing ends of the shoe portion. A clamp is secured to a distal end of the syphon and is connected to the shoe portion for clamping the shoe portion to the syphon.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: December 27, 2011
    Assignee: Kadant Inc.
    Inventors: Alan T Ives, Gregory L. Wedel
  • Patent number: 8066286
    Abstract: The invention relates to a multistage brush seal of a steam turbine that comprises several brushes which in turn comprise several bristles. A plurality of brushes are arranged next to each other and are configured different from each other with regard to the length of the bristles, or to the bristle thicknesses, or to the bristle rigidities, or to the lay angle of the bristles, or to the height of a first guard ring in front of or behind the brush seal in the flow direction, which delimits this brush seal, or to a gap between the bristles and an opposing surface.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: November 29, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Matthias Neef, Norbert Sürken, Karl Urlichs