US 12,244,189 B2
Dynamoelectric machine having cooling of the slip ring system
Herbert Binder, Neuburg (DE); Georg Brunner, Bad Birnbach (DE); Nicole Devingtel, Fürstenzell (DE); Daniel Friedl, Fürstenzell (DE); Thomas Garhammer, Buechlberg (DE); Robert Gruber, Ruhstorf (DE); Lorenz Hraska, Triftern (DE); Oliver Memminger, Neuburg a. Inn (DE); Günther Ortmeier, Ruhstorf a. d. Rott (DE); Matthias Reisinger, Ruhstorf a. d. Rott (DE); Klaus Schifferer, Neuhaus am Inn (DE); and Markus Sentef, Ruhstorf (DE)
Assigned to Flender GmbH, Bocholt (DE)
Appl. No. 18/272,751
Filed by Flender GmbH, Bocholt (DE)
PCT Filed Jan. 11, 2022, PCT No. PCT/EP2022/050419
§ 371(c)(1), (2) Date Jul. 17, 2023,
PCT Pub. No. WO2022/152685, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 21152087 (EP), filed on Jan. 18, 2021.
Prior Publication US 2024/0162794 A1, May 16, 2024
Int. Cl. H02K 17/24 (2006.01); H02K 7/18 (2006.01); H02K 9/04 (2006.01); H02K 9/28 (2006.01); H02K 13/00 (2006.01)
CPC H02K 17/24 (2013.01) [H02K 7/183 (2013.01); H02K 9/04 (2013.01); H02K 9/28 (2013.01); H02K 13/003 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A dynamoelectric machine, in particular a double-fed asynchronous machine, said dynamoelectric machine comprising:
a stator;
a shaft;
a rotor interacting with the stator, said rotor being arranged fixedly on the shaft for conjoint rotation and comprising a winding system; and
a slip ring system designed to enable the winding system of the rotor to be contacted electrically and comprising a slip ring body including slip rings which are arranged axially behind one another and spaced apart from one another in an insulated manner and which are assigned to an electrical phase, said slip ring body being connected fixedly to the shaft for conjoint rotation and having between an inner side of the slip ring body and the shaft at least one section designed to form a cavity which is open axially on both sides and is designed as a circumferential cutout so that the slip ring body lies at least on two circumferentially running boundary elements which are spaced apart axially from one another and which are connected through shrink fit in one piece with an inside of the slip ring body and/or of the shaft,
wherein the shaft is designed at least in a region of the slip ring system as a hollow shaft which has a hollow shaft portion assigned to the slip ring system for routing feed lines to the winding system of the rotor, and
wherein axial recesses are provided on the cavity axially on an inside and axially on an outside for enabling introduction of a cooling medium flow axially into the cavity and discharge of the cooling medium flow into an outlet region, with first ones of the axial recesses being formed about an entire circumference of one of the two circumferentially running boundary elements for introduction of the cooling medium flow, and with second ones of the axial recesses being formed about an entire circumference of the other one of the two circumferentially running boundary elements for discharge of the cooling medium flow.