Patent ID: 6036438
Filing Date: 2000-03-14
Classification: F01D,Y10S

Abstract:
A turbine nozzle comprising:an annular diaphragm inner ring disposed coaxially with a predetermined axis;an annular diaphragm outer ring disposed coaxially with the diaphragm inner ring so as to define an annular fluid passage between the diaphragm inner ring and the diaphragm outer ring; anda plurality of nozzle blades arranged in a circumferential arrangement in the fluid passage between the diaphragm inner ring and the diaphragm outer ring and each blade having a root and a tip located respectively at the diaphragm inner ring side and the diaphragm outer ring side;wherein the nozzle blades are curved so that the ratio S/T, where S is the minimum distance between the trailing edge of each nozzle blade and back surface of the nozzle blade adjacent to the former nozzle blade, and T is the pitch of the nozzle blades, is a minimum at a middle portion of the nozzle blade,and wherein the middle portion of each nozzle blade has a section dislocated in a flowing direction of a fluid which flows through the fluid passage relative to the root section and the tip section of the blade with respect to an axial direction.