TURBINE WHEEL CONTROL STAGE OVERSHROUD SEAL HOLDER Russian patent published in 2002 - IPC

FIELD: steam turbines. SUBSTANCE: proposed holder consists of two halves with horizontal split and has ring ridge with pair of lugs on lower half for suspending the holder at horizontal split. It has also converging part with ellipsoidal surface extending beyond the limits of control stage and second pair of lugs at end of converging part on lower half of holder. Converging part creates axial force pressing ring ridge of holder to wall of slot in cylinder housing. Second pair of lugs provides stability of holder from swinging. EFFECT: provision of additional strengthening device whose efficiency dies not depend on turbine operating conditions. 2 cl, 3 dwg