Hydraulic detachable coupling

Abstract

A hydraulic detachable coupling, which can transmit rated torque in a manner stable to vibrations, and can fully withstand abnormal torque. For this purpose, in a hydraulic detachable coupling ( 4 ) mounted detachably on a rotor ( 1 ) of a steam or gas turbine or other machine, a coupling sleeve ( 4 b ), which is fitted on a shaft end portion of a casing penetrating shaft ( 2 ) in the rotor ( 1 ), includes a taper hole portion ( 4 b - a ) which is interference-fitted on a taper shaft portion ( 2 a ) of the shaft end portion by a hydraulic pressure, and a straight hole portion ( 4 b - b ) having teeth ( 13 ) engaging a plurality of teeth ( 12 ) formed in a straight shaft portion ( 2 b ) of the shaft end portion, the taper hole portion ( 4 b - a ) and the straight hole portion ( 4 b - b ) being located adjacent to each other.

1 - 4 . (canceled) 
     
     
         5 . A hydraulic detachable coupling mounted detachably on a rotating shaft of a rotating machine, comprising:
 a coupling sleeve which is fitted on a shaft end portion of the rotating shaft,   the coupling sleeve including   an interference fit portion which is interference-fitted on an outer peripheral surface of the shaft end portion by a hydraulic pressure, and   an engagement portion which engages the outer peripheral surface of the shaft end portion at a plurality of locations in a circumferential direction, the interference fit portion and the engagement portion being located adjacent to each other, wherein the engagement portion is a straight hole portion having keyways formed therein, the keyways corresponding to a plurality of keyways formed in a straight shaft portion of the shaft end portion.   
     
     
         6 . The hydraulic detachable coupling according to  claim 5 , wherein one of the corresponding keyways is a groove of a rectangular cross section into which a square key is inserted, and other of the corresponding keyways are taper grooves of a semicircular cross section into which round taper keys are inserted. 
     
     
         7 . (canceled)