Gap seal in blades of a turbomachine

Details Gap seal in blades of a turbomachine Gap seal in blades of a turbomachine

2008-03-28

2011-10-25

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Including thermal expansion joint

Circumferentially spaced nozzle or stator segments

C415S191000, C415S228000, C415S110000

Reexamination Certificate

active

08043050

ABSTRACT:
A gap seal (9) radially seals a gap (8) which extends axially and radially between two blades (1, 2) of a turbomachine which are adjacent in the circumferential direction (3). The two blades (1, 2) have, in each case, an axially extending longitudinal slot (10, 11), which is open towards the gap (8), on its respective blade root (6, 7). A band-form or strip-form sealing element (12) engages with its longitudinal sides (13, 14) in the two longitudinal slots (10, 11) and bridges the gap (8). The one blade (1) has a projection (15) on its blade root (6), which projects from the blade root (6) in the circumferential direction (3) and extends in the circumferential direction (3) and radially, at least in the region of the respective longitudinal slot (10), and bridges an axial longitudinal end of the gap (8) in the process. The other blade (2) has a step-shaped recess (16) on its blade root (7), complementary to the projection (15) of the one blade (1) and in which the projection engages. The projection (15) has a transverse slot (17) which extends in the circumferential direction (3) and is open towards the gap (8). The sealing element (12) engages with an end face (18) in the transverse slot (17).

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