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: 20080061513
    Abstract: A shaft seal reduces leakage between a rotating shaft such as a rotor and a stator. The shaft seal or shingle seal includes a plurality of compliant-plate members attached to the stator in facing relation. The compliant-plate members define a sealing ring between the stator and the rotating shaft. Each of the compliant-plate members includes a plurality of shingles, where adjacent compliant-plate members are disposed relative to each other such that the shingles are at least partially staggered in a direction of axial leakage.
    Type: Application
    Filed: September 12, 2006
    Publication date: March 13, 2008
    Applicant: General Electric Company,
    Inventors: Shorya Awtar, William Edward Adis, Mark William Kowalczyk, Norman Arnold Turnquist
  • Publication number: 20080042365
    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 the static shell 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 barrier to axial leakage flow between the compliant plate members.
    Type: Application
    Filed: August 15, 2006
    Publication date: February 21, 2008
    Applicant: General Electric Company
    Inventors: Shorya Awtar, Norman Arnold Turnquist
  • Publication number: 20070295402
    Abstract: A gas supply and pressure control system delivers controlled pressurized gas according to an electrical command. The system includes a gas supply sub-system outputting a continuous high-pressure gas supply. A pressure control sub-system is provided in fluid communication with the gas supply sub-system and receives the continuous high-pressure gas supply. The pressure control sub-system provides a modulated pressure to a downstream volume, such as actuators for active seals in a turbomachinery environment, based on the electrical command.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Applicant: General Electric Company
    Inventors: Shorya Awtar, David Stephen Bielawa, Mark Edward Burnett, Frederick George Baily, Norman Arnold Turnquist, Kripa Kiran Varanasi
  • Publication number: 20070292258
    Abstract: An actuation pressure control system effects actuation of adjustable seal segments between stationary and rotating turbomachinery members. At least one actuator is coupled with each of the adjustable seal segments and controls a position of the seal segments, respectively. A pressure system is disposed within the turbomachinery that measures or estimates ambient pressure representing an actuator back pressure acting against the actuator. A pressure regulator via a controller pressurizes the actuator to a level sufficient for a desired seal operation and controls actuator pressure based on the actuator back pressure.
    Type: Application
    Filed: June 19, 2006
    Publication date: December 20, 2007
    Applicant: General Electric Company
    Inventors: Darrin Glen Kirchhof, William Charles Below, Mark Edward Burnett, Frederick George Baily, Shorya Awtar, Norman Arnold Turnquist
  • Patent number: 7255929
    Abstract: The invention provides spray coatings to achieve circumferentially non-uniform seal clearances in turbomachines. In steam and gas turbines it is desirable to assemble the machines with elliptical seal clearances to compensate for expected casing distortion, rotordynamics or phenomena that cause circumferentially non-uniform rotor-stator rubs. The claimed invention allows the casing hardware to be fabricated round, and a spray coating is applied to the radially inner surface such that the coating thickness varies circumferentially, providing the desired non-uniform rotor-stator clearance during assembly.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: August 14, 2007
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Mark William Kowalczyk, Farshad Ghasripoor
  • Patent number: 7229246
    Abstract: A compliant seal assembly for a rotating machine is provided. The seal assembly includes a static member, a movable member and a biasing member. The static member is rigidly fixed to the machine at its fore and aft ends. The movable portion has a first sealing surface configured to seal against a rotating member and a rear surface, which may be exposed to a fluid pressure to urge the first sealing surface toward a sealing position with the rotating member. The static and the movable members further include sealing surfaces at their fore, aft and end faces to seal against leakage of gas between the static and the movable members. The biasing member is configured to support the movable member on the static member and to urge the movable member away from the sealing position so as to reduce force on the rotating member during contact of the rotating member with the first sealing surface of the movable member.
    Type: Grant
    Filed: September 30, 2004
    Date of Patent: June 12, 2007
    Assignee: General Electric Company
    Inventors: Farshad Ghasripoor, Shorya Awtar, Norman Arnold Turnquist, Biao Fang, Carl Anthony Flecker, III, James William Stegmaier, Glenn Herbert Nichols, James Charles Przytulski, Kurt Grover Brink, Richard Cohen Lykins, Jeffrey Reid Thyssen, Mahmut Faruk Aksit
  • Patent number: 7125223
    Abstract: 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 first stator carrier segment, also with stator seals centripetally disposed on it; a shell that adjustably houses the first stator carrier segment and the second carrier segment; at least one displacement apparatus in operable communication with at least one stator carrier segment and configured to position the at least one stator carrier segment to provide active clearance control to the stator seals disposed on the at least one stator carrier segment.
    Type: Grant
    Filed: September 30, 2003
    Date of Patent: October 24, 2006
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Hamid Reza Sarshar, Biao Fang, Mehmet Demiroglu, Bernard Arthur Couture, Clement Gazzillo, Edip Sevincer
  • Patent number: 7066470
    Abstract: 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 bore. The bore is selectively pressurized to deploy the piston between the hanger and rail for temporarily retracting the seal segment from an adjacent rotor component.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: June 27, 2006
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Biao Fang, Osman Saim Dinc, Hamid Reza Sarshar, Mehmet Demiroglu, Mark Edward Burnett, Frederick George Baily, Mahmut Faruk Aksit, Ahmad Safi, Richard Robert Larsen
  • Patent number: 6969231
    Abstract: A sealing assembly for disposition in a rotary machine is disposed between a rotary component and a stationary component of the rotary machine. The sealing assembly includes at least one sealing strip affixed by caulking to one of the rotary and stationary components. An abradable portion is disposed on another of the rotary and stationary components and is positioned radially opposite to the at least one sealing strip. The abradable portion includes a thermal spray coated material, and the thermal spray coated material includes Cobalt, Nickel, Chromium, Aluminum, Yttrium (CoNiCrAlY) and further includes a material selected from the group consisting of hexagonal boron nitride, a thermoset polymer, and combinations thereof.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: November 29, 2005
    Assignee: General Electric Company
    Inventors: Farshad Ghasripoor, Norman Arnold Turnquist, Bernard Arthur Courture, Ronald Wayne Korzun
  • Patent number: 6951339
    Abstract: A brush seal is provided between static components of a turbine. The turbine flowpath has an inlet spaced from another the inner web of the first stage nozzle. A brush seal is disposed between the two static components to minimize leakage flow to the packing casing region. The bristles of the brush seal are preloaded to fill any gap between the static components caused by distortion or out-of-roundness of the opposed surfaces being sealed. A side plate may contact the opposed sealing surface, increasing the pressure capability of the brush seal and minimizing overall seal leakage by providing the minimum possible flow area restricted solely by the bristles.
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: October 4, 2005
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Huseyin Kizil, Kamlesh Mundra
  • Patent number: 6935634
    Abstract: 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 length dimension of the spring body.
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: August 30, 2005
    Assignee: General Electric Company
    Inventors: Lei Zuo, Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett, Biao Fang
  • Patent number: 6920794
    Abstract: A vibration control system for a rotary machine having a rotor, includes a sensor disposed within the rotary machine for sensing vibration of the rotor, a vibration damping device disposed within the rotary machine for imparting a reaction force to the rotor, and a controller arranged in operable communication with the sensor and the vibration damping device. The controller is adapted to receive a sensor signal from the sensor and to send a control signal to the vibration damping device for damping the vibration of the rotor.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: July 26, 2005
    Assignee: General Electric Company
    Inventors: Huageng Luo, Norman Arnold Turnquist, Imdad Imam
  • Patent number: 6854735
    Abstract: Multistage brush seals are made by initially specifying designs thereof for collectively sharing a differential pressure along an adjacent land subject to relative rotation with the seals. The seals are modified to share the loading without blowdown therefrom. The seals are further modified to ensure rotational stability with the land. The seals are built and tested under pressure to determine pressure blowdown thereof. And then, the seals are again modified to share the pressure loading under blowdown. In this way, the seals share the load in situ under the effects of blowdown.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: February 15, 2005
    Assignee: General Electric Company
    Inventors: Hamid Reza Sarshar, Norman Arnold Turnquist, Osman Saim Dinc
  • Publication number: 20040222596
    Abstract: 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 length dimension of the spring body.
    Type: Application
    Filed: May 8, 2003
    Publication date: November 11, 2004
    Inventors: Lei Zuo, Norman Arnold Turnquist, Frederick George Baily, Mark Edward Burnett, Biao Fang
  • Patent number: 6790001
    Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: September 14, 2004
    Assignee: General Electric Company
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
  • Patent number: 6786487
    Abstract: An actuated seal assembly for controlling flow in a fluid path in turbomachinery comprising a seal and a seal carrier coupled to the seal is provided. A displacement apparatus is coupled to the seal carrier for positioning the seal so as to control the flow in the fluid path. In addition, a drive system is provided for powering the displacement apparatus.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: September 7, 2004
    Assignee: General Electric Company
    Inventors: Osman Saim Dinc, Norman Arnold Turnquist, Mehmet Demiroglu, Hamid Reza Sarshar, Ahmad Safi, Mahmut Faruk Aksit, Roger Neal Johnson, Anthony Holmes Furman, Imdad Imam, Gerald Burt Kliman, James Hopkins, Richard Robert Larsen, David Michael Prowse, Steven Wayne Russell
  • Publication number: 20040126225
    Abstract: A sealing assembly for disposition in a rotary machine is disposed between a rotary component and a stationary component of the rotary machine. The sealing assembly includes at least one sealing strip affixed to one of the rotary and stationary components. An abradable portion is disposed on another of the rotary and stationary components and is positioned radially opposite to the at least one sealing strip.
    Type: Application
    Filed: December 31, 2002
    Publication date: July 1, 2004
    Applicant: GENERAL ELECTRIC GRC
    Inventors: Farshad Ghasripoor, Norman Arnold Turnquist, Bernard Arthur Courture, Ronald Wayne Korzun
  • Publication number: 20040101403
    Abstract: In a steam turbine high pressure end seal region, brush seals are provided between first and second pressure regions having a pressure drop in excess of the sealing capacity of an individual brush seal. To use brush seals between the first and second regions, one or more intermediate pressure regions are maintained at a substantially fixed predetermined pressure between the first and second pressure regions. Brush seals are interposed between adjacent pressure regions whereby the pressure drop between adjacent pressure regions is within the sealing capacity of the individual brush seal disposed between the adjacent pressure regions.
    Type: Application
    Filed: November 22, 2002
    Publication date: May 27, 2004
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Christopher Edward Wolfe, Frederick George Baily, Daniel Richard Cornell
  • Publication number: 20040100035
    Abstract: 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 bore. The bore is selectively pressurized to deploy the piston between the hanger and rail for temporarily retracting the seal segment from an adjacent rotor component.
    Type: Application
    Filed: July 31, 2003
    Publication date: May 27, 2004
    Inventors: Norman Arnold Turnquist, Biao Fang, Osman Saim Dinc, Hamid Reza Sarshar, Mehmet Demiroglu, Mark Edward Burnett, Frederick George Baily, Mahmut Faruk Aksit, Ahmad Safi, Richard Robert Larsen
  • Publication number: 20040094900
    Abstract: A brush seal is provided between static components of a turbine. The turbine flowpath has an inlet spaced from another the inner web of the first stage nozzle. A brush seal is disposed between the two static components to minimize leakage flow to the packing casing region. The bristles of the brush seal are preloaded to fill any gap between the static components caused by distortion or out-of-roundness of the opposed surfaces being sealed. A side plate may contact the opposed sealing surface, increasing the pressure capability of the brush seal and minimizing overall seal leakage by providing the minimum possible flow area restricted solely by the bristles.
    Type: Application
    Filed: November 15, 2002
    Publication date: May 20, 2004
    Inventors: Norman Arnold Turnquist, Mark Edward Burnett, Huseyin Kizil, Kamlesh Mundra