FIELD: machine building.
SUBSTANCE: invention relates to engineering and can be used in structures of gas turbine engines and steam turbines. Non-contact finger seal comprises annular plates with slots forming flexible fingers with movable platforms, and two thickened solid case discs with annular spacers fastened together along the outer diameter by rivets. In one of the case discs piezo actuators are connected to a power supply connected to a controller connected to a movable platform sensor.
EFFECT: technical result is reduced volume of gas leaks and increased life of the non-contact finger seal due to active control of movements by flexible moving platforms, which helps to prevent self-oscillation and improve the seal efficiency.
1 cl, 2 dwg
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