Patents by Inventor Xiaoqing Zheng

Xiaoqing Zheng 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).

  • Patent number: 9121297
    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: Grant
    Filed: March 28, 2011
    Date of Patent: September 1, 2015
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, William Edward Adis, Bernard Arthur Couture, Jr., Michael Dennis Mack, Kristan Brice Sears
  • Patent number: 9109459
    Abstract: A self-cleaning hydrodynamic face seal for use with a rotary machine is provided. The hydrodynamic face seal includes a seal ring having a radially-extending seal face. In addition, the hydrodynamic face seal includes at least one brush coupled to the seal ring. The at least one brush includes a plurality of flexible elements extending away from the radially-extending seal face of the face seal ring.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: August 18, 2015
    Assignee: General Electric Company
    Inventors: Shaik Karimulla Sha, Xiaoqing Zheng, Azam Mihir Thatte
  • Publication number: 20150184529
    Abstract: A steam turbine is provided. The steam turbine includes a housing and a steam inlet configured to discharge a primary steam flow within the housing. A stator is coupled to the housing and a rotor is coupled to the housing and located within the stator. The rotor and the stator are configured to define a primary flow path there between and in flow communication with the primary steam flow. The steam turbine includes a seal assembly coupled to the housing. The seal assembly includes a packing head and a plurality of seals. The packing head is configured to define a cooling flow path in flow communication with the rotor and configured to discharge a cooling steam flow toward the rotor. An anti-swirl device is coupled to the seal assembly and located between the rotor and the packing head.
    Type: Application
    Filed: January 2, 2014
    Publication date: July 2, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Sacheverel Quentin Eldrid, Jason L. Bowers
  • Publication number: 20150167486
    Abstract: A first aspect of the invention provides an axially faced seal system for a radial tip of a turbine component, the system comprising: a stationary turbine component; a rotating turbine component; and a seal ring mounted to the stationary turbine component, the seal ring extending axially to the rotating turbine component and engaging the rotating turbine component on a side surface, wherein the side surface of the rotating turbine component is on a continuous, rotating mating ring having a 360 degree arc.
    Type: Application
    Filed: December 12, 2013
    Publication date: June 18, 2015
    Applicant: General Electric Company
    Inventors: William Edmund Girzone, Xiaoqing Zheng
  • Publication number: 20150159497
    Abstract: A steam turbine is provided. The steam turbine includes a housing and a steam inlet coupled in flow communication to the housing which is configured to discharge a first steam flow within the housing. A stator is coupled to the housing and includes plurality of vanes. A rotor is coupled to the housing and located within the stator, wherein the rotor and the stator are configured to form a first flow path there between and in flow communication with the first steam flow. The rotor includes a plurality of blades coupled to the rotor, at least one root of the plurality of blades has a first side, a second side and a passageway coupled in flow communication to the first side and the second side. The passageway is configured to define a second flow path in flow communication with the first flow path and to discharge a second steam flow within the at least one root.
    Type: Application
    Filed: December 6, 2013
    Publication date: June 11, 2015
    Applicant: General Electric Company
    Inventors: Sacheverel Quentin Eldrid, Thomas Joseph Farineau, Michael Earl Montgomery, Timothy Scott McMurray, Xiaoqing Zheng
  • Publication number: 20150159498
    Abstract: A seal arrangement between radially-opposed rotating and stationary components in a turbomachine includes a first rotating component, a second stationary component, and a brush seal located radially therebetween. The brush seal has an axially-extending portion secured to the second stationary component, and an inwardly-extending portion extending across a gap between the first and second components. An inner ring portion of the second stationary component is located radially inward of, and in engagement with the axially-extending portion and at least part of the inwardly-extending portion of the brush seal, wherein an end of the axially-extending portion of the brush seal remote from the inwardly-extending portion is sandwiched between a pair of side rails fixed between the inner ring portion and an outer ring portion of the second stationary component.
    Type: Application
    Filed: December 5, 2013
    Publication date: June 11, 2015
    Applicant: General Electric Company
    Inventors: Debabrata MUKHOPADHYAY, Xiaoqing Zheng
  • Publication number: 20150130137
    Abstract: A self-cleaning hydrodynamic face seal for use with a rotary machine is provided. The hydrodynamic face seal includes a seal ring having a radially-extending seal face. In addition, the hydrodynamic face seal includes at least one brush coupled to the seal ring. The at least one brush includes a plurality of flexible elements extending away from the radially-extending seal face of the face seal ring.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Shaik Karimulla Sha, Xiaoqing Zheng, Azam Mihir Thatte
  • Publication number: 20150130138
    Abstract: An aspirating face seal for use with a rotary machine includes a rotating seal ring including a radially outer surface that includes an oblique portion. A stationary seal ring is coupled proximate the rotating seal ring such that a first gap is defined therebetween. The stationary seal ring is movable along a centerline axis of the rotary machine between an open position and a sealed position, and includes an extension member that extends across the first gap. An auxiliary seal includes at least one seal tooth that includes a seal tooth tip. The at least one seal tooth extends radially inward from the extension member such that a second gap is defined between the seal tooth tip and the oblique portion.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Norman Arnold Turnquist, Michael Dennis Mack, Rahul Anil Bidkar, Azam Mihir Thatte
  • Publication number: 20150132116
    Abstract: A hydrodynamic face seal ring for use in a rotary machine includes a support ring having at least two support ring segments and a radially-extending, first face. The support ring is configured to releasably couple to an inner surface of an outer casing of the rotary machine. The face seal ring also includes a sealing ring substantially concentric with the support ring. The sealing ring includes at least two sealing ring segments and a radially-extending, second face. The sealing ring is releasably coupled to the support ring such that the first face is mated against the second face.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Roderick Mark Lusted, Azam Mihir Thatte, Christopher David Suttles
  • Publication number: 20150132107
    Abstract: Embodiments of the invention relate generally to rotor cooling and, more particularly, to a stator member having at least one passage for the delivery of cooling steam to a bucket root. In one embodiment, the invention provides a turbine comprising: a rotor including a first bucket root; and a stator member having: a rotor bore within which at least a portion of the rotor is disposed; a facing end adjacent to the first bucket root of the rotor; a plurality of seals within the rotor bore for sealing against the rotor, the plurality of seals including a first seal nearest the facing end and a second seal adjacent to the first seal; and a plurality of passages, each extending from a surface of the rotor bore at a point between the first seal and the second seal and extending through the facing end.
    Type: Application
    Filed: November 13, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Sanjay Chopra, Thomas Joseph Farineau, Tai Joung Kim, Richard James Miller, Jr.
  • Publication number: 20150130142
    Abstract: A seal ring assembly for use with a rotary machine that includes an axis of rotation includes a seal housing comprising a secondary sealing surface and a secondary seal assembly coupled to the seal housing. The secondary seal assembly includes a seal ring coupled to the seal housing, wherein the seal ring is configured to form a secondary seal with the secondary sealing surface. The secondary seal assembly also includes at least one protection ring positioned upstream from the seal ring. The secondary seal assembly is configured to be biased along the axis such that biasing the at least one protection ring facilitates removing debris from at least a portion of the secondary sealing surface over which the seal ring travels during biasing.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 14, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Rahul Anil Bidkar, Karimulla Shaik Sha, Azam Mihir Thatte
  • Publication number: 20150071771
    Abstract: An inter-stage seal for a turbomachine includes a sealing member extending from a first end to a second end through an intermediate portion having a sealing surface, a first mounting member extending from a first end portion coupled to the sealing member adjacent the first end to a second, cantilevered end portion having a first rotor mounting element, and a second mounting member extending from a first end portion coupled to the sealing member adjacent the second end to a second, cantilevered end portion having a second rotor mounting element.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Revanth Krishna Nallam
  • Publication number: 20150071766
    Abstract: Systems and devices configured to reduce thermal design clearances (e.g., between stationary nozzles connected to the inner casing and rotor buckets connected to the rotor) in turbines by actively controlling casing movements and/or locations during turbine operation are disclosed. In one embodiment, a clearance management system includes: a first inner casing support arm shaped to connect to an inner casing of a turbine and extend through an outer casing of the turbine; a seal system disposed about the first inner casing support arm and configured to connect to the outer casing; and a set of actuators disposed on a turbine foundation of the turbine and connected to the first inner casing support arm, the set of actuators located external to the outer casing and configured to adjust a position of the inner casing relative to the outer casing via manipulation of the first inner casing support arm.
    Type: Application
    Filed: September 11, 2013
    Publication date: March 12, 2015
    Applicant: General Electric Company
    Inventors: Karimulla Shaik Sha, Prakash Rajagopal, Xiaoqing Zheng
  • Publication number: 20150040567
    Abstract: A turbine assembly is disclosed herein. The turbine assembly may include a rotor with at least one bucket extending radially therefrom. The turbine assembly also may include a stator assembly positioned adjacent to the at least one bucket. Moreover, the turbine assembly may include a seal assembly. The seal assembly may include a first flange extending in a substantially axial direction from the at least one bucket. The seal assembly also may include a second flange extending from the stator assembly in the substantially axial direction opposite the first flange. The second flange may include at least one protuberance projecting towards the first flange.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Applicant: General Electric Company
    Inventors: Guoqiang Lu, Xiaoqing Zheng, Jong Youn Pak
  • Patent number: 8936247
    Abstract: A seal assembly for sealing a stationary component and a rotating component including a seal tooth mating surface for mating with a seal tooth, the seal tooth mating surface including a plateau portion for sealingly receiving the seal tooth during a steady-state operation of the seal assembly and a first concave portion adjacent to the plateau portion for receiving the seal tooth with a clearance during a first non-steady-state operation of the seal assembly, wherein the seal tooth is coupled to one of the stationary component and the rotating component and the seal tooth mating surface is coupled to the other of the stationary component and the rotating component.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: January 20, 2015
    Assignee: General Electric Company
    Inventor: Xiaoqing Zheng
  • Patent number: 8932001
    Abstract: Certain embodiments of the invention may include systems, methods and apparatus for providing a labyrinth seal. In an example embodiment, a method is provided for sealing a flow path between a stationary element and a rotating element of a turbomachine. The method can include disposing at least one fixture on an inner surface of a stationary element associated with the turbomachine; disposing a packing ring linked via a spring element to the fixture wherein the packing ring comprises at least one bore; and disposing, according to a predetermined profile, a plurality of interdigitated packing ring teeth and rotor teeth intermediate to the packing ring and the rotating element; wherein the bore, packing ring teeth, and rotor teeth, cooperate to counter a moment associated with one or more axial forces.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: January 13, 2015
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Hrishikesh Deo, Binayak Roy
  • Patent number: 8919780
    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: November 13, 2012
    Date of Patent: December 30, 2014
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, William Edward Adis, Bernard Arthur Couture, Jr., Michael Dennis Mack
  • Patent number: 8920835
    Abstract: A paliperidone double-layered osmotic pump controlled release tablet and the preparation method thereof are disclosed. The double-layered osmotic pump controlled release tablet comprises a rigid membrane, a push layer, a drug layer, an isolation layer and an aesthetic coating, wherein the rigid membrane contains a semi-permeable polymer, a porogen and/or a plasticizer and has one or more drug release orifices on one end, the push layer comprises an expanding material, an osmotic agent, a binder, a colorant and a lubricant, the drug layer contains a pharmaceutically active ingredient, a hydrophilic polymer, an osmotic agent, a colorant, a lubricant and an antistatic agent, the isolation layer is located between the inner surface of the rigid membrane and the push layer, and contains a hydrophilic polymer. The paliperidone double-layered osmotic pump controlled release tablet shows an increasing drug release rate at early stage and keeps a constant drug release rate at later stage.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: December 30, 2014
    Assignees: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, QILU Pharamceutical Co., Ltd.
    Inventors: Yong Gan, Chunliu Zhu, Qingmin Yang, Jingyi Wang, Xiaoqing Zheng, Li Gan, Xinxin Zhang
  • Patent number: 8858166
    Abstract: Systems and devices for substantially fluidly isolating portions of a rotary machine are disclosed. In one embodiment, a seal assembly for a rotary machine includes: a complementary set of seal segments configured relative one another so as to form a substantially continuous body with butt gaps between the seal segments, the segments including: a head flange; and an axial neck connected to the head flange, wherein the axial neck extends radially inboard and includes an axial slot formed substantially there through; and at least one butt gap seal element, wherein the at least one butt gap seal element includes an axial flange and a radial flange, the axial flange disposed within the axial slots of adjacent seal segments; and the radial flange extending radially inboard from the axial slots to a proximity of the rotary machine substantially forming a barrier to axial flow through the butt gap.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: October 14, 2014
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, Jr., Mehmet Demiroglu, Gregory Leonard Diantonio, Daniel Edward Jordy
  • Publication number: 20140225326
    Abstract: The present application provides for a brush seal system for use about a rotor of a rotary machine. The brush seal system may include a number of brush seal segments, with each of the brush seal segments having a number of bristles, and one or more of the brush seal segments including an elliptical profile so as to vary a clearance between the brush seal segments and the rotor.
    Type: Application
    Filed: April 15, 2014
    Publication date: August 14, 2014
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Mehmet Demiroglu, Michael Dennis Mack, Guoqiang Lu