IGNITION SYSTEM IN COMBUSTION CHAMBER OF GAS TURBINE ENGINE, COMPRISING SPARK PLUG OF SEMICONDUCTOR TYPE, COMBUSTION CHAMBER, COMPRISING SUCH SPARK PLUG AND GAS TURBINE ENGINE Russian patent published in 2013 - IPC F02C7/266 H01T13/06 

FIELD: engines and pumps.

SUBSTANCE: ignition system comprises a spark plug of semiconductor type in a shell, a tube rigidly connected with a combustion chamber of a gas turbine engine, a movable bushing and facilities for air direction for cooling of a spark plug semiconductor. The movable bushing provides for installation of a spark plug into the tube and perceives expansion of the spark plug perpendicular to its axis. The movable bushing comprises a cylindrical part, forming a circular cavity of the bushing with the spark plug for circulation of cooling air. The shell and semiconductor at its ends at the side of the combustion chamber form a circular cavity of the spark plug. The shell comprises holes in the area of the specified circular cavity of the spark plug, communicating with the circular cavity of the bushing, and holes on its surface facing the combustion chamber. Other inventions of the group relate to a combustion chamber, comprising the above ignition system, and a gas turbine engine, comprising such combustion chamber.

EFFECT: inventions make it possible to increase service life of a semiconductor spark plug.

4 cl, 3 dwg