| 摘要 |
FIELD: machine building.SUBSTANCE: invention relates to a method of aluminising inner surface of channel (10) of hollow structural element (1, 120, 130) of hydraulic machine and to hollow structural element (1, 120, 130) of hydraulic machine. Diffusion coating is applied by aluminising at least on internal surface of one channel (10) of structural element (1, 120, 130), wherein channel (10) comprises regions (4, 7) with different cross sections. Method comprises first application of diffusion coating by aluminising in area (7) with smaller cross section, providing a larger thickness of channel wall, and second application of diffusion coating by aluminising in area (4) with a large cross section, providing smaller bulge of channel wall as compared to said first application of coating. Source of aluminium used at said first aluminisation is NiAl(16), at second - NiAl (13).EFFECT: coolant flow rate adjustment is provided inside actively cooled structural elements.9 cl, 6 dwg |
