SEPARATOR STAGE Russian patent published in 1995 - IPC

FIELD: turbomechanical engineering. SUBSTANCE: separator stage has nozzle assembly with nozzle blades and running-blade assembly with shroud having moisture-discharge slots, set of main running blades whose concave airfoil surface opposes rotation of running-blade assembly, as well as set of additional blades of smaller height fixed on shroud. Additional blades are of curvilinear shape mounted upstream of main blades along steam flow with concave airfoil surface oriented in direction of rotation of running-blade assembly. Additional blades are arranged so that their exit edges are downstream of entrance edges of main blades and clearance is formed between main and additional blades. EFFECT: improved design. 2 dwg