GAS-DRIVEN TURBINES HIGH-TEMPERATURE STUD PINS REFRIGERATION METHOD AND DEVICE FOR ITS ACTUALIZATION Russian patent published in 2018 - IPC F01D5/18 

FIELD: electricity-producing industry.

SUBSTANCE: gas-driven turbine high-temperature stud pin refrigeration method comprises the cooling air supply to the internal cavities through the air ports with the punched holes in the wall and the cooling air supply from the air cavity. The air extraction goes from the compressor stage with the following extracted air direction for the gas-driven turbine high-temperature stud pin refrigeration. Upon that, the extracted air flow rate control is effected on account of the isolation valve adjustment on the lines of the air extraction from the compressor stage, and the extracted air temperature control is effected on account of the air extraction from the compressor stage. Further, the extracted air is transferred through the cylindrical connecting leg into the cylindrical metal tube of a minor diameter and then after the distribution in a volume the extracted air runs into the cooling cylindrical conduit, where the extracted air is supplied through the perforation hole in the cylindrical metal tube of a minor diameter into the cooling cylindrical conduit, where it removes a part of the heat from the internal surface of the external cylindrical tube of a greater diameter and the air heats up as consequence of the heat loss. At this time, the extracted air cools down the external cylindrical metal tube walls of a greater diameter, and further the air is forced out into the outlet cylindrical connecting leg and further either goes back into the gas-driven turbine cycle or to the atmosphere. The cooling cylindrical conduit is formed by two cylindrical metal tubes with bases that have the common normal axis. Along with this, the cylindrical metal tube of a minor diameter has the perforation hole and is linked to the cylindrical connecting leg, and the external cylindrical metal tube of a greater diameter is linked to the outlet cylindrical connecting leg.

EFFECT: enhancement of the operational life and reliability of the flanged joints packing of the gas-turbine plant casing and elimination of the leakage through the splits of the flanged joints packing of the gas-turbine plant in consequence of the thermal stress reduction on the connecting stud pin of the flanged joints without change of the gas-driven turbine composite member, the stud pins, the case and the gas-driven turbine flanged joints.

4 cl, 3 dwg