Patents by Inventor Ketsu KO

Ketsu KO 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).

  • Steam turbine seal clearance adjusting method
    Patent number: 11828185
    Abstract: A steam turbine includes a rotary shaft, a blade provided on an outer peripheral surface of the rotary shaft, a casing covering the rotary shaft and the blade from an outer peripheral side, a vane provided on an inner peripheral surface of the casing, and a seal device including a seal ring provided between the outer peripheral surface and the vane and a position adjusting portion configured to adjust a position of the seal ring in a radial direction. A seal clearance adjusting method includes a measurement step of measuring a length of the seal ring in the radial direction from a predetermined reference position as a reference length, a preparation step of preparing an unused seal ring, and an adjustment step of adjusting a length of the unused seal ring from the reference position to be the reference length by the position adjusting portion.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: November 28, 2023
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shunsuke Mizumi, Ketsu Ko, Juichi Kodera, Masayuki Kayahara
  • STEAM TURBINE SEAL CLEARANCE ADJUSTING METHOD, AND STEAM TURBINE
    Publication number: 20220235667
    Abstract: A steam turbine includes a rotary shaft, a blade provided on an outer peripheral surface of the rotary shaft, a casing covering the rotary shaft and the blade from an outer peripheral side, a vane provided on an inner peripheral surface of the casing, and a seal device including a seal ring provided between the outer peripheral surface and the vane and a position adjusting portion configured to adjust a position of the seal ring in a radial direction. A seal clearance adjusting method includes a measurement step of measuring a length of the seal ring in the radial direction from a predetermined reference position as a reference length, a preparation step of preparing an unused seal ring, and an adjustment step of adjusting a length of the unused seal ring from the reference position to be the reference length by the position adjusting portion.
    Type: Application
    Filed: May 28, 2020
    Publication date: July 28, 2022
    Inventors: Shunsuke MIZUMI, Ketsu KO, Juichi KODERA, Masayuki KAYAHARA