CONTROL VALVE OF STEAM TURBINE Russian patent published in 2011 - IPC F16K1/06 F01D17/10 

FIELD: machine building.

SUBSTANCE: here is disclosed control valve of steam turbine consisting of steam box, cover with rod passing through, heat protecting screen and journal box of valve. Also, in the cover there are installed guiding bushings for the rod. The heat protecting screen is positioned in the steam box; with its collar it is arranged between parting planes of the steam box and cover. In a lower part of the heat protecting screen there is made a clamp. A spline bushing over the journal box of the valve stops the valve inside the journal box from rotation under effect of steam flow. The journal box of the valve and the spline bushing are sliding fit inside the heat protecting screen with a gap and are pressed between the clamp and the cover of the valve. The clamp can be made, for example, as a split retaining ring inserted into a response slot of the protecting screen.

EFFECT: assembly-disassembly of valve at assembly and repair; reliability of structure at turbine operation eliminating fastening elements with pins, threads and other methods, owing to which there is essentially decreased labour input at assembly and repair of valve; improved repair ability of valve and efficiency of turbine at continuous service in whole.

2 cl, 2 dwg