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).

  • 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: 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
  • 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
  • Publication number: 20170051620
    Abstract: Embodiments of the present disclosure are directed toward a face seal including a stator ring configured to be disposed about a rotor of a turbine, wherein the stator ring includes a first ring segment and a second ring segment which are circumferentially split and configured to cooperatively form the stator ring, and bearing elements disposed between the first and second ring segments and configured to enable relative axial motion between the first and second ring segments at interfaces between the first and second ring segments. The stator ring further includes hydrodynamic surface features on surfaces of the first and second ring segments configured for facing the rotor, wherein the hydrodynamic surface features comprise Y-shaped grooves each comprising a stem portion extending from a middle region of stator ring and splitting into inner and outer branches extending towards inner and outer diameters of the stator ring and terminating prior to the inner and outer diameters.
    Type: Application
    Filed: November 8, 2016
    Publication date: February 23, 2017
    Inventors: Azam Mihir Thatte, Karimulla Shaik Sha, Rahul Anil Bidkar, Xiaoqing Zheng
  • Patent number: 9574453
    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: Grant
    Filed: January 2, 2014
    Date of Patent: February 21, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Thomas Joseph Farineau, Sacheverel Quentin Eldrid, Jason L. Bowers
  • Patent number: 9540942
    Abstract: A shaft sealing system and method are disclosed for a high or intermediate pressure turbine section having a rotating member including a shaft and a stationary member surrounding the rotating member and defining a steam flow path. The shaft sealing system comprises at least one seal disposed about each of a first end and a second end of the shaft; and a connection line for conducting steam from the first turbine section to a downstream portion of the turbine. The downstream portion of the turbine is one of a low pressure section and a condenser, and has a lower pressure than both of the first turbine section and ambient pressure conditions.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: January 10, 2017
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Daniel Robert Coffey, Guoqiang Lu, John Richard Powers, Steven Paul Scarlata, Christopher David Suttles
  • Patent number: 9534502
    Abstract: Embodiments of the present disclosure are directed toward a face seal including a stator ring configured to be disposed about a rotor of a turbine, wherein stator ring comprises a first ring segment and a second ring segment configured to cooperatively form the stator ring, wherein the first and second ring segments are circumferentially split and have at least one bearing element disposed between the first and second ring segments, and wherein the at least one bearing element is configured to enable relative axial motion between the first and second ring segments at interfaces between the first and second ring segments.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: January 3, 2017
    Assignee: General Electric Company
    Inventors: Azam Mihir Thatte, Karimulla Shaik Sha, Rahul Anil Bidkar, Xiaoqing Zheng
  • Patent number: 9528384
    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: Grant
    Filed: June 27, 2011
    Date of Patent: December 27, 2016
    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: 20160298482
    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: Application
    Filed: June 21, 2016
    Publication date: October 13, 2016
    Applicant: General Electric Company
    Inventors: Xiaoqing Zheng, Bernard Arthur Couture, JR., Michael John Bowman, William Edward Adis, Michael Dennis Mack, Kim James Clark
  • Patent number: 9435217
    Abstract: A seal assembly for sealing between a rotating component and a stationary component in a turbomachine. The seal assembly includes a plurality of radially inwardly projecting, axially spaced teeth extending from the stationary component, wherein at least one of the plurality of teeth has at least one axially extending hole therethrough. Axial flow of an operating fluid through the holes acts as an air-curtain to interrupt swirl flow in a seal cavity, therefore reducing steam force that could act to destabilize rotordynamics.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: September 6, 2016
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Daniel Mark Brown, Jason Winfred Jewett, Fred Thomas Willett, Jr.
  • Patent number: 9394800
    Abstract: Various embodiments include a turbomachine including a swirl-inhibiting seal. In various particular embodiments, a turbomachine includes: a rotor section having sets of axially disposed blades; a diaphragm section at least partially surrounding the rotor section, the diaphragm section including a set of nozzles positioned between adjacent sets of axially disposed blades, wherein the set of nozzles includes at least one nozzle having: a base section coupled to the diaphragm section; a blade coupled to the base section; and a radial tip section coupled to a radial end of the blade, the radial tip section including an axially extending flange having a slot extending therethrough for controlling fluid flow within the turbomachine.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: July 19, 2016
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Jason Winfred Jewett, Richard James Miller, Jr.
  • Patent number: 9388698
    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: Grant
    Filed: November 13, 2013
    Date of Patent: July 12, 2016
    Assignee: General Electric Company
    Inventors: Xiaoqing Zheng, Sanjay Chopra, Thomas Joseph Farineau, Tai Joung Kim, Richard James Miller, Jr.