초록 ▼

A diaphragm for an axial flow fluid machine comprising inner and outer walls for defining an annular fluid flow passage therebetween, a blade lattice having a plurality of stationary blades disposed in the fluid flow passage, each of the blades having a concave side surface and a convex side surface

A diaphragm for an axial flow fluid machine comprising inner and outer walls for defining an annular fluid flow passage therebetween, a blade lattice having a plurality of stationary blades disposed in the fluid flow passage, each of the blades having a concave side surface and a convex side surface, adjacent two stationary blades defining an inter-blade fluid flow path together with the inner and outer walls, a suction port open to a first portion of the fluid flow path adjacent to the concave side surface and the inner or outer wall to suck the fluid therefrom, a blowoff port open to blow off the fluid to a second portion of the fluid flow path adjacent to the inner or outer wall and at which the pressure is lower than that at the first portion, and a passageway for communicating between the suction port and the blowoff port, thereby reducing the secondary flow loss and the blade configuration loss in the blade lattice.

대표청구항 ▼

A diaphragm for an axial flow fluid machine, comprising inner and outer diaphragm walls defining therebetween an annular fluid flow passage, a blade lattice having a plurality of stationary blades disposed in said fluid flow passage, each of said blades having a concave side surface and a convex sid

A diaphragm for an axial flow fluid machine, comprising inner and outer diaphragm walls defining therebetween an annular fluid flow passage, a blade lattice having a plurality of stationary blades disposed in said fluid flow passage, each of said blades having a concave side surface and a convex side surface, adjacent stationary blades defining therebetween an inter-blade fluid flow path together with said inner and outer diaphragm walls, a suction port means in the inner diaphragm wall open to a first pOrtion of said inter-blade fluid flow path adjacent to said concave side surface and said inner diaphragm wall to suck the fluid therefrom, a blowoff port means in the inner diaphragm wall open to blow off the fluid to a second portion of an adjacent inter-blade fluid flow path adjacent to said convex side surface and the inner diaphragm wall and at which the pressure is lower than that at said first portion, and a passageway means for communicating between said suction port means and said blowoff port means, wherein a portion of the main fluid flow flowing through the inter-blade fluid flow path is sucked through said suction port means and is blown off from said blowoff port means into the adjacent inter-blade fluid flow path to suppress a cross flow flowing from the concave side surface of the stationary blade toward the convex side surface of the adjacent stationary blade.