A centrifugal compressor plug welded impeller and a welding method thereof

Abstract

The present application relates to a kind of centrifugal compressor impeller, specifically a kind of centrifugal compressor plug welding impeller and welding method thereof, to solve the technical problems of long processing cycle and high manufacturing cost when narrow impeller of existing structure is formed by spark machining, the present application includes wheel cover, wheel disc and blade, wheel cover is provided with plug welding groove corresponding with blade cooperation;Plug welding groove includes wide slot and narrow slot, which are oppositely arranged and connected at the bottom, the opening of wide slot is located on the side of wheel cover away from blade, the opening of narrow slot is located on the side of wheel cover close to blade, the width of wide slot is greater than the width of narrow slot;The end surface of blade is close to the surface of wheel cover close to blade side;Define the thickness of blade as d, the opening width of narrow slot as Y;Blade is welded with wheel cover by plug welding groove;When d<3mm, d>Y, and the end surface of blade overlaps on both sides of narrow slot opening, when d=3mm, dY, and blade is located between the two edges of narrow slot opening, and there is a gap between the two edges.

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