US 11,990,815 B2
Canned rotodynamic flow machine for a molten salt nuclear reactor and an active magnetic bearing for use in a flow machine for a molten salt nuclear reactor
Aslak Stubsgaard, Copenhagen K (DK); Thomas Jam Pedersen, Copenhagen K (DK); and Thomas Steenberg, Copenhagen K (DK)
Assigned to Copenhagen Atomics A/S, Kastrup (DK)
Appl. No. 18/016,862
Filed by Copenhagen Atomics A/S, Kastrup (DK)
PCT Filed Jul. 29, 2021, PCT No. PCT/DK2021/050251
§ 371(c)(1), (2) Date Jan. 18, 2023,
PCT Pub. No. WO2022/022792, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. PA202070505 (DK), filed on Jul. 31, 2020; and application No. PA202070506 (DK), filed on Jul. 31, 2020.
Prior Publication US 2023/0246534 A1, Aug. 3, 2023
Int. Cl. H02K 44/06 (2006.01); H02K 3/12 (2006.01); H02K 5/128 (2006.01); H02K 7/09 (2006.01); H02K 7/14 (2006.01)
CPC H02K 44/06 (2013.01) [H02K 3/12 (2013.01); H02K 5/128 (2013.01); H02K 7/09 (2013.01); H02K 7/14 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A canned rotodynamic flow machine (1) configured for operating with a molten salt or a cover gas working fluid at temperatures above 500° C., said canned rotodynamic flow machine (1) comprising:
an impeller (6) arranged in a volute (3),
said volute (3) having an inlet (4) for said working fluid and an outlet (5) for said working fluid,
an induction or reluctance motor or generator comprising a stator (10) and a rotor (8),
a can (18) in the form of a containment shell which separates a working fluid area from a dry area containing the stator (10), with the rotor (8) arranged in the working fluid area,
said rotor (8) being operably coupled to said impeller (6),
said stator (10) comprising stator windings for inducing a magnetic field that penetrates the rotor (8),
said stator windings being distributed in slots (11) arranged in said stator (10),
the part of the stator windings inside said slots (11) is formed by one or more electrically conductive solid bars (12),
wherein each solid bar (12) extends no more than once through a slot (11), and wherein
said solid bars (12) are positioned inside said slots (11) by at least two spacers (13) that space the surface of said solid bars (12) from the surface of said slots (11) and create a void between the surface of solid bars (12) and the surface of said slots (11) for electrically insulating said one or more electrically conductive solid bars (12) from said stator (10).