Patents by Inventor John Y. Xia

John Y. Xia 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).

  • Gas turbine with baffle reducing hot gas ingress into interstage disc cavity
    Patent number: 6558114
    Abstract: The subcavity between a stator seal assembly and the upstream rotor disc in the interstage disc cavity of a gas turbine is divided into a radially inward region and a radially outward region by an annular baffle that extends from the seal assembly partially across the subcavity toward the rotor disc. The volume of cooling air injected into the interstage disc cavity can be reduced to increase turbine efficiency because the baffle interrupts recirculation in the subcavity to confine ingress of the hot main gas flow to the radially outward region away from the rotor seals.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: May 6, 2003
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Joseph Theodore Tapley, John Y. Xia, Zhenhua Xiao