US 12,241,475 B2
Radial impeller
Thomas Heigold, Gaisbach (DE); and Klaus Gundel, Kupferzell-Belzhag (DE)
Assigned to Nicotra Gebhardt GmbH, Waldenburg (DE)
Filed by Nicotra Gebhardt GmbH, Waldenburg (DE)
Filed on Oct. 14, 2022, as Appl. No. 17/966,255.
Claims priority of application No. 21202991 (EP), filed on Oct. 15, 2021.
Prior Publication US 2023/0124865 A1, Apr. 20, 2023
Int. Cl. F04D 29/24 (2006.01); F04D 29/30 (2006.01)
CPC F04D 29/24 (2013.01) [F04D 29/30 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A radial impeller, comprising: a cover plate with an inlet opening and a support plate, said plates being connected to one another by a vane ring having multiple vanes,
wherein said vanes each have two side edges opposite one another, one of which is connected to the cover plate and the other to the support plate,
wherein the side edges each extend between a vane inlet edge and a vane outlet edge which is opposite in a circumferential direction of the impeller,
wherein the vanes each have a hollow profile and have two vane halves delimiting a cavity between them which are applied to one another and are each connected to one another in the region of the vane inlet edge and the vane outlet edge by a welded connection,
wherein the vanes each have an inlet end region which tapers towards the vane inlet edge and which is formed by end portions of the two vane halves curved convexly on the outer faces of the vane halves facing away from one another, in such a manner that the inlet end region has a continuously curved outer contour extending over both vane halves,
wherein the vane inlet edge and the vane outlet edge of a respective vane have an arcuate profile starting from the cover plate in the direction of the support plate,
wherein the vanes are components which are separate from the cover plate and the support plate and are each connected in a region of their side edges to the cover plate and to the support plate by fastening measures that comprise a plug connection with elongate plug pins arranged on the vanes and mating plug elements in the form of receiving openings arranged on the cover plate and the support plate, and
wherein the elongated plug pins are arranged in alternate fashion and are alternating in a region of an outer face of a first of the two vane halves and an outer face of a second of the two vane halves.