METHOD TO MANUFACTURE LABYRINTH SEAL COMB, THERMOMECHANICAL PART AND GAS TURBINE ENGINE COMPRISING SUCH COMB Russian patent published in 2012 - IPC F16J15/447 F16J15/453 B22F3/00 B23K26/34 C23C4/12 

FIELD: machine building.

SUBSTANCE: method to manufacture a circular comb (10) for a labyrinth seal is characterised by formation of a protruding part of the comb (10) by serial application of layers onto a base (12). The following stages are carried out: a) a substrate (20) is made in the form of a solid of revolution around a longitudinal axis, with the base (12) of the circular comb (10), b) a spray nozzle (38) is installed as capable of displacement relative to the substrate (20), and is connected to the first source (35) of the first powdery material, which is identical to the substrate material, and the second source (45) of the second powdery material, c) used as connected with an optical head (34) of the laser source installed as capable of displacement relative to the substrate (20) to focus a laser beam at the point of the substrate surface (20), d) the optical head (34) and a nozzle (38) are adjusted along one and the same point of the surface of the base top (12) of the comb (10), e) the laser source and sources (35, 45) of the powdery material are activated, at the same time a molten pool is developed as localised at the level of the specified point, where a powdery material is sprayed, as a result a localised boss is created, f) the optical head (34) and the nozzle (38) are adjusted along another point of the surface of the base top (12), adjacent with the localised boss, and the stage e) is repeated to form a layer substantially along the entire width of the base top (12), g) at least one section of the protruding part of the comb (10) is formed by means of serial application of narrower and narrower layers in longitudinal direction on the base top (12). Each layer is produced as a result of performance of stages d) - e).

EFFECT: no necessity to do mechanical treatment, combs are produced with higher wear resistance.

13 cl, 4 dwg