Monolithic shaft for cryogenic turbo machine, cryogenic turbo machine and method for manufacturing
AssigneeCryostar SAS
InventorAnny Murad-Bickard
Life of this patent
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Abstract
A monolithic shaft configured for use in a cryogenic turbo machine with an impeller to be mounted at the monolithic shaft, the monolithic shaft comprising an impeller part, at which said impeller is to be mounted, and a support part, wherein the monolithic shaft comprises or is made of a first material and a second material, wherein said first material and said second material differ from each other in ferromagnetic and/or cryogenic properties, wherein said impeller part comprises or is made of said first material, and said support part comprises or is made of said second material. The invention also relates to such cryogenic turbo machine and a method of manufacturing such monolithic shaft.
Claims17
A cryogenic turbo machine comprising:
- an impeller and a monolithic shaft,
- the monolithic shaft comprising an impeller part and a support part, and the impeller is mounted at the impeller part,
- wherein the monolithic shaft comprises a first material and a second material, wherein said first material and said second material differ from each other in ferromagnetic and/or cryogenic properties,
- wherein said impeller part comprises said first material, and said support part comprises said second material,
- wherein said first material and said second material are connected together by additive manufacturing, and
- wherein said first material comprises steel, a steel alloy, or a nickel-based alloy and wherein said second material comprises low alloy steel or a carbon steel, and
- the cryogenic turbo machine further comprising:
- (a) magnetic bearings, by which the monolithic shaft is supported in an axial and/or radial direction, or
- (b) an electric machine, said electric machine comprising at least part of the monolithic shaft as at least part of a rotor.
A cryogenic turbo machine comprising:
- an impeller,
- a monolithic shaft comprising an impeller part, at which said impeller is mounted, and a support part,
- the monolithic shaft comprises a first material and a second material, wherein said first material and said second material differ from each other in ferromagnetic and/or cryogenic properties,
- wherein said impeller part comprises said first material, and said support part comprises said second material, and
- wherein said first material comprises steel, a steel alloy, or a nickel-based alloy and wherein said second material comprises low alloy steel or a carbon steel,
- said cryogenic turbo machine further comprising an electric machine, said electric machine comprising at least part of the monolithic shaft as at least part of a rotor.
A monolithic shaft configured for use in a cryogenic turbo machine with an impeller to be mounted at the monolithic shaft, the monolithic shaft comprising:
- an impeller part, at which said impeller is to be mounted, and a support part,
- wherein the monolithic shaft comprises a first material and a second material, wherein said first material and said second material differ from each other in ferromagnetic and/or cryogenic properties,
- wherein said impeller part comprises said first material, and said support part comprises said second material, and
- wherein said first material comprises precipitation hardening stainless steel and said precipitation hardening stainless steel is quenched and/or double tempered precipitation hardening stainless steel, and
- wherein said second material comprises low alloy steel or a carbon steel.
Dependencies are inferred from the claim text.