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: 10047865
    Abstract: Various embodiments include a rotor key member, along with a related assembly and steam turbine. Particular embodiments include a rotor key member for radially retaining a circumferential seal in a steam turbine rotor body, the rotor key member including: a main body sized to contact an axial face of the circumferential seal; and a hook extending from the main body in a direction axially away from the circumferential seal, the hook sized to substantially complement a corresponding shelf in the steam turbine rotor body to restrict movement of the circumferential seal relative to the steam turbine rotor body.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: August 14, 2018
    Assignee: General Electric Company
    Inventors: Steven Sebastian Burdgick, James Royce Howes, Sean Christopher Morrissey, Xiaoqing Zheng
  • Patent number: 10041367
    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: Grant
    Filed: December 12, 2013
    Date of Patent: August 7, 2018
    Assignee: General Electric Company
    Inventors: William Edmund Girzone, Xiaoqing Zheng
  • Publication number: 20180149022
    Abstract: A blade includes an airfoil, a stationary portion coupled to a radially inner end of the airfoil, and a leakage flow guide vane assembly coupled to the stationary portion. The leakage flow guide vane assembly includes a plurality of passages defined therein. The passages are oriented to induce a swirl velocity to a working fluid flowing through the passages.
    Type: Application
    Filed: November 30, 2016
    Publication date: May 31, 2018
    Inventors: Yu Wang, Sean Morrissey, Xiaoqing Zheng, Tao Guo
  • Patent number: 9963992
    Abstract: A seal for a rotary machine includes a flexible element extending circumferentially about a rotor and extending generally radially from a first end to a free second end. The flexible element is coupled proximate the first end for rotation with the rotor. The flexible element extends at substantially a first angle between at least an intermediate portion of the flexible element and the free second end when the rotor is operating at less than a critical speed, such that a clearance gap is defined between the free second end and a stationary portion. The seal also includes a retaining plate having a stop that orients the flexible element at a second angle proximate the free second end when the rotor is operating at equal to or greater than the critical speed, such that the flexible element forms a dynamic seal between the rotor and the stationary portion.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: May 8, 2018
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Michael Dennis Mack, Neelesh Nandkumar Sarawate, Deepak Trivedi
  • Patent number: 9926800
    Abstract: A seal includes a housing having a back plate and a front plate. A supporting bristle layer is disposed adjacent to the back plate, and bristles in the supporting bristle layer have a first diameter. A sealing bristle layer is disposed adjacent to the supporting bristle layer, and bristles in the sealing bristle layer have a second diameter. A shielding/protecting bristle layer is disposed adjacent to the sealing bristle layer, and bristles in the shielding/protecting bristle layer have a third diameter. The second diameter is smaller than both the first diameter and the third diameter.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: March 27, 2018
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, Jr., Michael John Bowman, William Edward Adis, Michael Dennis Mack, Kim James Clark
  • Publication number: 20180058241
    Abstract: A seal for a rotary machine includes a flexible element extending circumferentially about a rotating component and extending generally radially from a first end to a free second end. The flexible element is coupled proximate the first end for rotation with the rotating component. The seal also includes a retaining plate having a stop face that orients the flexible element at a first angle when the rotating component is operating at less than a critical speed and under the including of pressure loading, such that a clearance gap is defined between the free second end and a stationary component. The flexible element extends at substantially a second angle when the rotating component is operating at a speed greater than the critical speed, such that the flexible element forms a dynamic seal between the rotating component and the stationary component.
    Type: Application
    Filed: August 26, 2016
    Publication date: March 1, 2018
    Inventors: Neelesh Nandkumar Sarawate, Deepak Trivedi, Xiaoqing Zheng
  • Publication number: 20180051582
    Abstract: A brush seal has bristles with a free end sealing against a radially inward surface of a stationary component. The bristles are angled axially 15 degrees to 70 degrees, and circumferentially at an angle that is less than the axial angle. A retaining plate extends radially outward from the rotating component, and supports the bristles from centrifugal loading in an operative state of a turbomachine. A bristle shield extends radially outward along a length of the bristles, such that the bristle shield is configured to shield the bristles from flow during an operative state of the turbomachine. The bristles are located between the retaining plate and the bristle shield. A circumferential groove has a downstream side and an upstream side, and a side plate is attached to the upstream side. The fixed end of the bristles is attached to the upstream side of the groove by the side plate.
    Type: Application
    Filed: August 16, 2016
    Publication date: February 22, 2018
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Gene David Palmer, Michael Dennis Mack, David Bruce Knorr, Jason Lyn Bowers
  • Publication number: 20180003069
    Abstract: A turbomachine and a method of operating the turbomachine are disclosed. The turbomachine includes a stator, a rotor including a rotor bearing face, a face seal assembly, a first pressure cavity, and a second pressure cavity. The face seal assembly includes a seal ring including a seal bearing face, a first pressure cavity, and a plurality of isolated hydrostatic ports extending from the first pressure cavity to the seal bearing face. The face seal assembly is slidably coupled to the stator and defines a face seal clearance between the rotor and seal bearing faces. The second and third pressure cavities are defined by the stator, the rotor, and the face seal assembly. The third pressure cavity is disposed downstream of the second pressure cavity with reference to flow of a process fluid along the stator and rotor. The first pressure cavity is isolated from the second and third pressure cavities.
    Type: Application
    Filed: January 3, 2017
    Publication date: January 4, 2018
    Inventors: Rahul Anil Bidkar, Azam Mihir Thatte, Jifeng Wang, Xiaoqing Zheng, Edip Sevincer
  • Publication number: 20180003067
    Abstract: A turbomachine and a method of operating the turbomachine are disclosed. The turbomachine includes a stator, a rotor including a rotor bearing face, and a face seal assembly including a first segmented seal ring and a second segmented seal ring. The first segmented seal ring includes a plurality of joints and a first flat-contact surface and the second segmented seal ring includes a plurality of segment ends and a second flat-contact surface. One of the first and second segmented seal rings includes a seal bearing face. The second segmented seal ring is coupled to the first segmented seal ring such that the second flat-contact surface is in contact with the first flat-contact surface. The plurality of segment ends is circumferentially offset from the plurality of joints. The first segmented seal ring is slidably coupled to the stator and defines a face seal clearance between the rotor and seal bearing faces.
    Type: Application
    Filed: January 3, 2017
    Publication date: January 4, 2018
    Inventors: Rahul Anil Bidkar, Azam Mihir Thatte, Jifeng Wang, Xiaoqing Zheng, Edip Sevincer
  • Publication number: 20170218786
    Abstract: A steam turbine is provided. The steam turbine includes a housing, a first steam inlet configured to discharge a first steam flow within the housing, and a second steam inlet configured to provide a second steam flow. A rotor and stator are coupled to the housing and configured to form a first flow path therebetween 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 receive the second steam flow within the at least one root. The at least one root includes an angel wing configured to seal the second steam flow from the first flow path.
    Type: Application
    Filed: April 11, 2017
    Publication date: August 3, 2017
    Inventors: Sacheverel Quentin Eldrid, Thomas Joseph Farineau, Michael Earl Montgomery, Timothy Scott McMurray, Xiaoqing Zheng
  • Patent number: 9702261
    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: Grant
    Filed: December 6, 2013
    Date of Patent: July 11, 2017
    Assignee: General Electric Company
    Inventors: Sacheverel Quentin Eldrid, Thomas Joseph Farineau, Michael Earl Montgomery, Timothy Scott McMurray, Xiaoqing Zheng
  • Patent number: 9695705
    Abstract: Systems and methods for controlling a clearance between a rotor and a stator of a steam turbine during transient operations rely upon heating or cooling a shell support structure of the steam turbine that supports the stator of the steam turbine. Selectively heating or cooling the shell support structure makes it possible for thermal growth/contraction rates and magnitudes of the shell support structure to better match the thermal growth/contraction rates and magnitudes of a bearing support structure of the steam turbine during transient operations. As a result, the clearance between the rotor and the stator of the steam turbine can be maintained.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: July 4, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Edward Arthur Dewhurst, Edward J. Cooper, Hemanth Kumar
  • Patent number: 9683453
    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: Grant
    Filed: September 11, 2013
    Date of Patent: June 20, 2017
    Assignee: General Electric Company
    Inventors: Karimulla Shaik Sha, Prakash Rajagopal, Xiaoqing Zheng
  • Publication number: 20170159477
    Abstract: Various embodiments include a rotor key member, along with a related assembly and steam turbine. Particular embodiments include a rotor key member for radially retaining a circumferential seal in a steam turbine rotor body, the rotor key member including: a main body sized to contact an axial face of the circumferential seal; and a hook extending from the main body in a direction axially away from the circumferential seal, the hook sized to substantially complement a corresponding shelf in the steam turbine rotor body to restrict movement of the circumferential seal relative to the steam turbine rotor body.
    Type: Application
    Filed: December 7, 2015
    Publication date: June 8, 2017
    Inventors: Steven Sebastian Burdgick, James Royce Howes, Sean Christopher Morrissey, Xiaoqing Zheng
  • Patent number: 9611749
    Abstract: Embodiments of the present disclosure are directed toward a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring comprises a plurality of hydrodynamic pads extending from a sealing face of the stator ring, wherein each of the plurality of hydrodynamic pads is configured to hydrodynamically engage with a rotor ring.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 4, 2017
    Assignee: General Electric Company
    Inventors: Azam Mihir Thatte, Rahul Anil Bidkar, Xiaoqing Zheng
  • Publication number: 20170089215
    Abstract: A seal for a rotary machine includes a flexible element extending circumferentially about a rotor and extending generally radially from a first end to a free second end. The flexible element is coupled proximate the first end for rotation with the rotor. The flexible element extends at substantially a first angle between at least an intermediate portion of the flexible element and the free second end when the rotor is operating at less than a critical speed, such that a clearance gap is defined between the free second end and a stationary portion. The seal also includes a retaining plate having a stop that orients the flexible element at a second angle proximate the free second end when the rotor is operating at equal to or greater than the critical speed, such that the flexible element forms a dynamic seal between the rotor and the stationary portion.
    Type: Application
    Filed: September 29, 2015
    Publication date: March 30, 2017
    Inventors: Xiaoqing Zheng, Michael Dennis Mack, Neelesh Nandkumar Sarawate, Deepak Trivedi
  • Patent number: 9593589
    Abstract: An actuation system to control clearance in a turbomachine including a shaft bearing including at least one axially displaceable thrust bearing. The axially displaceable thrust bearing configured to axially displace a rotating component relative to a stationary component to control the clearance therebetween. The system further including a plurality of actuators coupled to the at least one axially displaceable thrust bearing and configured to actuate the at least one axially displaceable thrust bearing to control the clearance. The plurality of actuators is configured to deactivate a diametrically opposed actuator in the event of an actuator failure to maintain zero moment. In a topography network, each diametrically opposed actuator pair is coupled to a single control line. In an alternate topography network, alternating actuators are coupled to a single control line. In addition, a method of actuating a thrust bearing to control clearance in a turbomachine is disclosed.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: March 14, 2017
    Assignee: General Electric Company
    Inventors: Deepak Trivedi, Norman Arnold Turnquist, Xiaoqing Zheng, Murat Inalpolat
  • Publication number: 20170067344
    Abstract: Provided are a method of forming a rotating component. The method for forming a rotating component includes providing a rotor having an outer surface. A circumferential surface feature is formed on the outer surface of the rotor. The forming includes applying metallic material to the outer surface of the rotor to build up the circumferential surface feature on outer surface of the rotor to define at least one cooling passageway. A rotating component having a circumferential surface feature, a turbine system and an apparatus for forming the rotating component are also disclosed.
    Type: Application
    Filed: September 3, 2015
    Publication date: March 9, 2017
    Inventors: Fred Thomas WILLETT, JR., Xiaoqing ZHENG
  • Patent number: 9587501
    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: Grant
    Filed: November 11, 2013
    Date of Patent: March 7, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Rahul Anil Bidkar, Karimulla Shaik Sha, Azam Mihir Thatte
  • Patent number: 9587505
    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: Grant
    Filed: December 5, 2013
    Date of Patent: March 7, 2017
    Assignee: General Electric Company
    Inventors: Debabrata Mukhopadhyay, Xiaoqing Zheng