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INNER CASING COOLING PASSAGE FOR DOUBLE FLOW TURBINE

  • US 20200131930A1
  • Filed: 10/26/2018
  • Published: 04/30/2020
  • Est. Priority Date: 10/26/2018
  • Status: Active Grant
First Claim
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1. A turbomachine structure, comprising:

  • a first inner casing including an inlet for a working fluid, a first flowpath segment, a second flowpath segment, a first axial end, and a second axial end, wherein the first flowpath segment and the second flowpath segment are oriented in opposing axial directions to one another, wherein the inlet is fluidly connected to both the first flowpath segment and the second flowpath segment, wherein the first flowpath segment exits through the first axial end, and wherein the second flowpath segment exits through the second axial end;

    a second inner casing surrounding the first inner casing, the second inner casing including a third flowpath segment and a fourth flowpath segment, wherein the third flowpath segment is fluidly connected to the first flowpath segment and the fourth flowpath segment is fluidly connected to the second flowpath segment;

    an extraction chamber defined between the first inner casing and the second inner casing adjacent the second axial end;

    a cooling passage defined between the first inner casing and the second inner casing and extending from the first axial end to the extraction chamber;

    a first extraction port positioned proximate to the first axial end and fluidly connected to the cooling passage and to the first flowpath segment at a location in the first flowpath segment having a first pressure; and

    a second extraction port positioned proximate to the second axial end and fluidly connected to the extraction chamber and to the second flowpath segment at a location in the second flowpath segment having a second pressure, wherein the second pressure is less than the first pressure.

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