FIELD: stator assembly.
SUBSTANCE: proposed stator assembly (22) for a gas turbine contains a stator ring (24) that runs around the longitudinal axis (A) and has an outer edge part (29) made with an annular groove (30), while the annular groove (30) defines boundary of the wall (34) located on the side of the front edge and the wall (35) located on the side of the back edge, while the wall (34) located on the side of the front edge is made with an annular radial surface (56) located on the side of the front edges, and with an annular axial surface (57) located on the side of the front edge. A plurality of stator blades (25) are located radially and attached next to each other to the outer edge part (29) of the stator ring (24) so as to close the annular groove (30) and form an annular cooling channel (32), each blade (25) of the stator contains a fin (38), an outer support element (29) and an inner support element (40) attached to the stator ring (24), while the inner support element (40) contains a platform (42) and a protrusion (43), located on the side of the front edge, and the protrusion (44) located on the side of the back edge, passing in the radial direction inward from the platform (42), while the protrusion (43), located on the side of the front edge, is connected to the wall (34) located on the side of the front edge, and the protrusion (44), located on the side of the back edge, is connected to the wall (35), located on the side of the back edge, while the protrusion (43), located on the side of the front edge, is connected to the wall (34), located on the side of the front edge, so as to leave the main radial gap (48) between the wall (34), located on the side of the front edge, and the platform (42) and form the surface (50) located on the side of the front edge of the protrusion (43), located on the side of the front edge. On the surface (50) of the protrusion (43) located on the side of the front edge, which is located on the side of the front edge, at least one main hole (55) for cooling is made, which is in fluid communication with the annular cooling channel (32). The wall (34), located on the side of the front edge, contains the main guiding ledge (59), protruding in the radial direction from the annular axial surface (57), located on the side of the front edge, and located in the axial direction opposite of at least one said main hole (55) for cooling.
EFFECT: minimizes the amount of sealing air and at the same time guarantees sufficient protection against thermal damage.
15 cl, 8 dwg
