Patent ID: 6758652
Filing Date: 2004-07-06
Classification: F01D,F05D

Abstract:
An apparatus for choking the control stage of a steam turbine, the apparatus comprising:a closure mechanism capable of closing at least one nozzle of a turbine, said at least one nozzle facing a final section of a feed pipe of said turbine, and a control mechanism capable of controlling said closure mechanism, said control mechanism capable of causing said closure mechanism to assume a rest position and a working position, said closure mechanism configured to close at least one nozzle in the vicinity of the final section of said feed pipe, wherein the closure mechanism comprises at least one wall movable between said rest position and said working position, wherein said wall is in contact with delimitation elements delimiting the inlet section of said at least one nozzle, and wherein said at least one wall defines a closure surface parallel to the direction of displacement of said wall from said rest position to said working position.