STEAM-TURBINE CONTROL VALVE Russian patent published in 1998 - IPC

FIELD: controlling steam discharge through steam turbine. SUBSTANCE: control valve has guide sleeve, rod passed though the latter, cup with cylindrical skirt and annular collar in its end for lifting the cup, bushing with annular collar placed in cup skirt so that its annular collar is above that provided on rod tip to make rod impart lifting force through this annular collar to that of bushing and through the latter to valve cup. Spline ridges are provided on bushing end opposite to annular collar; corresponding spline slots are made in annular collar of cup skirt which form, together with spline ridges of bushing, axial turning joint. Guide sleeve has spline slots which lock this joint against relative turning of its members. EFFECT: improved repairability independent of operating time of valve. 3 dwg