NOZZLE-RETAINING DEVICE FOR TURBINE, RETAINING NOZZLE IN CARRIER GROOVE ON HORIZONTAL JOINT SURFACE BETWEEN UPPER AND LOWER CARRIER HALF PARTS WITHOUT INTERRUPTING RADIAL MOUNTING OF NOZZLE

摘要

PURPOSE: A nozzle-retaining device for a turbine is provided to retain a nozzle in a carrier groove on a horizontal joint surface between upper and lower carrier half parts without interrupting the radial mounting of the nozzle. CONSTITUTION: A nozzle-retaining device for a turbine comprises a cylindrical nozzle carrier half part having a groove(27) of a shape opening toward the radial inside of an arch shape terminating at both ends of each joint surface(16); plural nozzles each including an airfoil(17) and an outer base(20) received in the groove as a shape corresponding to the shape of the groove; and a key slot(38) formed to one end of the groove in one horizontal joint surface. One of the nozzles of one horizontal joint surface in the groove of the carrier half part has a notch extended toward the radial inside of one joint surface and formed in the outer base. A key(40) in the key slot is fixed to the carrier half part and is combined to the notch of one nozzle and the nozzle is retained in the carrier half part.