Patents by Inventor Norman Arnold Turnquist

Norman Arnold Turnquist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20030059298
    Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a sealing surface on a rotatable component radially outwardly of the rotor surface. The contact between the brush seal and sealing surface lies along an axially upstream projecting flange of an annular platform such that heat generated by frictional contact between the bristles and the sealing surface has minimal effect on the rotor surface and hence rotor dynamics. A backup labyrinth seal is provided between the web and platform. Additionally, axially upstream projecting flanges are provided on the downstream buckets and which flanges are spaced radially outwardly of the rotor surface and lie in registration with the diaphragm web. Labyrinth teeth seal between the diaphragm web and the bucket flanges serving as a backup seal.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 27, 2003
    Inventors: Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Norman Arnold Turnquist, Bruce William Brisson, David Alan Caruso
  • Publication number: 20030052457
    Abstract: The present invention, in one embodiment, provides a low leakage sealing system comprising a pipe for directing the flow of a fluid medium and a housing surrounding the pipe. The housing is spaced radially outward of the pipe defining an annular space. A sealing assembly, comprising an inner seal, outer seal and a final seal are disposed in a spaced relationship in an axial direction in the annular space so as to reduce leakage flow therethrough that is created by the flowing fluid medium pressure. In addition, a ledge is disposed downstream from the sealing assembly and the final seal.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 20, 2003
    Inventors: Norman Arnold Turnquist, Wei-Ming Chi
  • Patent number: 6517314
    Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and axial projecting platforms on bucket dovetails at a location spaced radially outwardly of the outer diameter of the rotor. The downstream axially adjacent bucket dovetails also have platforms serving as complementary sealing surfaces to labyrinth teeth formed on the web. By locating the combined labyrinth and brush seal radially outwardly of the outer diameter of the shaft, thermal bowing of the rotor is eliminated. By providing backup labyrinth seals at the same radial location, axial thrust loads are eliminated in the event of brush seal failure.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 11, 2003
    Assignee: General Electric Company
    Inventors: Mark Edward Burnett, Norman Arnold Turnquist, Christopher Edward Wolfe, Bruce William Brisson, Fredrick George Baily, David Alan Caruso
  • Patent number: 6502823
    Abstract: 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 circumferentially surrounds and is radially spaced apart from the rotor wherein the casing comprises an inner circumferential channel generally coaxially aligned with the rotor. The seal assembly comprises a plurality of seal segments disposable in a circumferential array in the channel so as to be movable between radially inward and radially outward positions. In addition, the seal assembly comprises a plurality of displacement apparatuses comprising at least one fluid inlet and configured for urging apart the seal segments upon introduction of a fluid medium in the fluid inlet. Each of the seal segments comprises an end having at least one of the displacement apparatuses circumferentially disposed thereon.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: January 7, 2003
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Mehmet Demiroglu
  • Publication number: 20020192074
    Abstract: The present invention provides, in one embodiment, an annular turbine seal for disposition in a turbine between a rotatable component having an axis of rotation and a turbine housing about the same axis of rotation. The turbine seal has a plurality of arcuate seal carrier segments that have an abradable portion secured to the seal carrier segments. In addition, at least one spring is disposed on the seal carrier segment to exert a force and maintain the seal carrier segment adjacent to the rotatable component.
    Type: Application
    Filed: June 18, 2001
    Publication date: December 19, 2002
    Inventors: Norman Arnold Turnquist, Mahmut Faruk Aksit, Farshad Ghasripoor, Raymond Edward Chupp
  • Publication number: 20020190474
    Abstract: A plurality of packing ring segments are provided in a stationary component and about a rotating shaft. Each packing ring segment includes a brush seal insert and a plurality of labyrinth seal teeth along a concave sealing face thereof. Each segment is formed of a pair of components which, in assembly, have a split line through a slot receiving the brush seal insert. The brush seal insert includes a pair of narrow strips or rods welded to outer ends of the bristle pack and is bendable to a range of diameters. By forming forward and backing surfaces defining the slot integral with the components, the width of the bristle slot and the gap between the bristle pack and the forward surface can be readily manufactured and obtained.
    Type: Application
    Filed: June 19, 2001
    Publication date: December 19, 2002
    Inventors: Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett
  • Patent number: 6460857
    Abstract: 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 welded to the end faces of the backing plates at each of the opposite ends of the segment. Each end plate terminates at approximately one-half the length of the bristles along the end face to prevent the bristles from bending circumferentially and axially during handling while maintaining substantially uniform flexibility of the bristles throughout the entire length of the segment.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: October 8, 2002
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Frederick George Baily, Christopher Edward Wolfe
  • Patent number: 6454270
    Abstract: A low leakage sealing system is provided between a steam pipe and a housing comprised of a pair of shells and a nozzle box movable relative to one another. The sealing system includes large and small diameter sealing rings engaging the pipe and shells or nozzle box and a secondary sealing element disposed between the sealing rings and one of the pipe and shells or nozzle box. The sealing elements comprise frustoconical elements having curved end surfaces forming primary seals with the sealing rings and the housing. In another form, the sealing system includes annular carrier elements having radially opening cavities for receiving sealing rings engageable with the pipe and housing, respectively. The carrier elements are axially spaced from a plurality of sealing rings to provide the low leakage sealing system.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: September 24, 2002
    Assignee: General Electric Company
    Inventors: Wei-Ming Chi, Norman Arnold Turnquist, Christopher Edward Wolfe, Mark Arne Florin, Mahmut Faruk Aksit
  • Patent number: 6439844
    Abstract: The adjoining edges of bucket covers are sealed one to the other. A brush seal projecting from a stationary shroud overlies the bucket covers. A joint at which the adjacent covers sealingly engage each other precludes radial outflow of high pressure fluid into bristles of the brush seal, preventing radial and axial deflection of the bristles and consequent failure of the bristles. The joints between the covers may comprise lap or tongue-and-groove joints.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: August 27, 2002
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Lawrence D. Willey, Christopher Edward Wolfe
  • Patent number: 6435513
    Abstract: A brush seal is comprised of arcuate seal segments having ends cut in a radial direction with bristles “canted” at an approximate 45° angle relative to radii of the segments, leaving triangular regions adjacent one end of each segment devoid of bristles at the segment interfaces. The brush seals are retrofit into conventional labyrinth seals with the backing plate for the bristles comprising a labyrinth tooth profile extending fully 360° about the seal, including those areas where bristles are not present. The sealing capacity is not substantially degraded, while affording significant sealing improvements over conventional labyrinth seals. Additionally, when retrofit into labyrinth seals with radial movement, the individual labyrinth seal segments are free to move radially independently of one another during transients.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: August 20, 2002
    Assignee: General Electric Company
    Inventors: David Robert Skinner, Bharat S. Bagepalli, Robert Harold Cromer, Osman Saim Dinc, Norman Arnold Turnquist, Christopher Edward Wolfe
  • Patent number: 6431827
    Abstract: A diaphragm has an annular groove formed of deep and shallow grooves with the deep groove opening into the shallow groove. A combination spill strip/brush seal is disposed in the groove. The brush seal comprises a pair of flexible bars secured to the proximal ends of the brush bristles by welding and is received in the shallow groove and a recess in an axial face of the spill strip. The spill strip has base portions extending into the deep groove. The combination spill strip/brush seal is secured in the annular groove by peening material of the diaphragm into the spill strip/brush seal combination. The brush seal may be used with different diameters of spill strips and diaphragm grooves.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: August 13, 2002
    Assignee: General Electric Company
    Inventors: Christopher Edward Wolfe, Norman Arnold Turnquist, Frederick George Baily, David Robert Skinner
  • Publication number: 20020081195
    Abstract: A diaphragm has an annular groove formed of deep and shallow grooves with the deep groove opening into the shallow groove. A combination spill strip/brush seal is disposed in the groove. The brush seal comprises a pair of flexible bars secured to the proximal ends of the brush bristles by welding and is received in the shallow groove and a recess in an axial face of the spill strip. The spill strip has base portions extending into the deep groove. The combination spill strip/brush seal is secured in the annular groove by peening material of the diaphragm into the spill strip/brush seal combination. The brush seal may be used with different diameters of spill strips and diaphragm grooves.
    Type: Application
    Filed: December 21, 2000
    Publication date: June 27, 2002
    Inventors: Christopher Edward Wolfe, Norman Arnold Turnquist, Frederick George Baily, David Robert Skinner
  • Publication number: 20020071764
    Abstract: The adjoining edges of bucket covers are sealed one to the other. A brush seal projecting from a stationary shroud overlies the bucket covers. A joint at which the adjacent covers sealingly engage each other precludes radial outflow of high pressure fluid into bristles of the brush seal, preventing radial and axial deflection of the bristles and consequent failure of the bristles. The joints between the covers may comprise lap or tongue-and-groove joints.
    Type: Application
    Filed: December 11, 2000
    Publication date: June 13, 2002
    Applicant: General Electric Company
    Inventors: Norman Arnold Turnquist, Lawrence D. Willey, Christopher Edward Wolfe
  • Patent number: 6367806
    Abstract: 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 downstream plates of the brush seal segment, and at least one passage radially formed through the main seal segment to communicate a balancing pressure from a pressure source located exteriorly of an outer periphery of the main seal segment to a cavity defined in the downstream plate of the brush seal segment at a downstream side of the layer of bristles of the brush seal segment.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: April 9, 2002
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Osman Saim Dinc, George Ernest Reluzco, Robert Harold Cromer, Martin Francis O'Connor, David Robert Skinner, Christopher Edward Wolfe
  • Patent number: 6308958
    Abstract: An arrangement and method for radially positioning a brush seal relative to a rotor provides a main seal segment having a slot open toward the rotor and an interior ledge facing away from the rotor, a brush seal segment in the slot and having an exterior shoulder facing toward the rotor and overlying the interior ledge such that the brush seal segment can move radially relative to the main seal segment and rotor and the exterior shoulder can move toward and away from the interior ledge, a shim disposed and establishing a minimum spacing between the interior ledge and the exterior shoulder, and set screws tightened into spaced threaded holes in the main seal segment forcing the exterior shoulder against the shim and to the minimum spacing from the interior ledge so as to prevent radial floating of the brush seal segment in the slot.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: October 30, 2001
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Christopher Edward Wolfe
  • Patent number: 6286211
    Abstract: A method for making a brush-tooth seal, such as a brush-tooth seal which is attachable to a turbine stator, includes obtaining a seal carrier having a groove and having seal teeth and obtaining a brush seal having bristles with tips. The brush seal is engaged in the groove and then attached to the seal carrier. Then, the tips of the bristles of the attached and engaged brush seal are cut, such as with an electric discharge machining (EDM) wire, at a predetermined distance from the longitudinal axis of the seal carrier.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: September 11, 2001
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Osman Saim Dinc, Frederick George Baily, Robert Harold Cromer, Lawrence Edward Rentz, Christopher Edward Wolfe
  • Patent number: 6260269
    Abstract: A method for overhauling a steam turbine to increase its power without increasing its overall length. Existing seal assemblies containing seals other than brush seals are replaced with longitudinally-shorter replacement seal assemblies having only brush seals. An existing turbine section, such as a high-pressure turbine section, is replaced with a longitudinally-longer replacement turbine section having additional stages (i.e., additional rows of rotating buckets or blades).
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: July 17, 2001
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Osman Saim Dinc, George Ernest Reluzco, Daniel Richard Cornell, Robert Harold Cromer, Kenneth Elmer Robbins, Christopher Edward Wolfe
  • Patent number: 6261057
    Abstract: An arrangement and method for accurately radially locating a brush seal relative to a rotor provides a labyrinth seal segment having a slot open toward the rotor and defining an interior ledge facing away from the rotor, a brush seal segment inserted in the slot and having an exterior shoulder facing toward the rotor and overlying the interior ledge of the labyrinth seal segment such that the brush seal segment can move radially relative to the labyrinth seal segment and rotor and the shoulder of the brush seal segment can move toward and away from the interior ledge of the labyrinth seal segment, and set screws tightened into spaced apart threaded holes in the labyrinth seal segment forcing the shoulder of the brush seal segment against the ledge of the labyrinth seal segment so as to prevent radial floating of the brush seal segment relative to the labyrinth seal segment.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: July 17, 2001
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Frederick George Baily, Lawrence Edward Rentz
  • Publication number: 20010007384
    Abstract: A brush seal is comprised of arcuate seal segments having ends cut in a radial direction with bristles “canted” at an approximate 45° angle relative to radii of the segments, leaving triangular regions adjacent one end of each segment devoid of bristles at the segment interfaces. The brush seals are retrofit into conventional labyrinth seals with the backing plate for the bristles comprising a labyrinth tooth profile extending fully 360° about the seal, including those areas where bristles are not present. The sealing capacity is not substantially degraded, while affording significant sealing improvements over conventional labyrinth seals. Additionally, when retrofit into labyrinth seals with radial movement, the individual labyrinth seal segments are free to move radially independently of one another during transients.
    Type: Application
    Filed: February 26, 2001
    Publication date: July 12, 2001
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: David Robert skinner, Bharat S. Bagepalli, Robert Harold Cromer, Osman Saim Dine, Norman Arnold Turnquist, Christopher Edward Wolfe
  • Patent number: 6257586
    Abstract: A brush seal is comprised of arcuate seal segments having ends cut in a radial direction with bristles “canted” at an approximate 45° angle relative to radii of the segments, leaving triangular regions adjacent one end of each segment devoid of bristles at the segment interfaces. The brush seals are retrofit into conventional labyrinth seals with the backing plate for the bristles comprising a labyrinth tooth profile extending fully 360° about the seal, including those areas where bristles are not present. The sealing capacity is not substantially degraded, while affording significant sealing improvements over conventional labyrinth seals. Additionally, when retrofit into labyrinth seals with radial movement, the individual labyrinth seal segments are free to move radially independently of one another during transients.
    Type: Grant
    Filed: April 15, 1997
    Date of Patent: July 10, 2001
    Assignee: General Electric Co.
    Inventors: David Robert Skinner, Bharat S. Bagepalli, Robert Harold Cromer, Osman Saim Dinc, Norman Arnold Turnquist, Christopher Edward Wolfe