Abstract: The turbomachine assembly includes a first turbomachine having an inlet, an outlet and a rotary shaft, a second turbomachine having an inlet, an outlet and a rotary shaft, a transfer duct fluidly connecting the outlet of the first turbomachine to the inlet of the second turbomachine, and a casing housing the turbomachines and the transfer duct; the turbomachines are located adjacent to each other so that the outlet of the second turbomachine is close to the outlet of the first turbomachine and the inlet of the second turbomachine is remote from the outlet of the first turbomachine; the outlet of the second turbomachine has an end portion shaped like a cochlea (i.e. a spiral duct); the transfer duct has an annular shape, and surrounds the end portion of the outlet of the second turbomachine.

Abstract: A compressor end head for providing a thermal barrier to a mechanical seal includes an inner end head having an inner end head opening, inner end head grooves in the inner end head opening, configured to place and seal an end portion of a compressor shaft; and an outer end head having an outer end head opening configured to enclose the inner end head.

Abstract: A compressor end head for providing a thermal barrier near a mechanical seal includes an inner end head and an outer end head. The outer end head includes an opening in the center for enclosing the inner end head, an outlet and grooves alongside surfaces radially adjacent the opening. The inner end head has an opening in the center, an inlet, grooves in the opening for enclosing an end portion of a compressor shaft and a flow path along an outer surface.

Abstract: A fuel supply system is provided having a first fuel gas compressor configured to be driven by a motor and a second fuel gas compressor configured to be driven by a shaft of a gas turbine system. The first fuel gas compressor and the second fuel gas compressor are configured to supply a pressurized fuel flow to a combustor of the gas turbine system, and the first fuel gas compressor and the second fuel gas compressor are coupled to one another in series.

Abstract: A set of impellers that are axially adjacent to each other and that have respective axial through holes are assembled. At least a first and a second axial tie rods are used. At least one connection element being axially adjacent to two impellers respectively at its two sides and having an axial through hole is provided. The connection element is used for securing, at one side of its axial through hole, an end of the first axial tie rod and, at the other side of its axial through hole, an end of the second axial tie rod. Typically, the connection element is one of the impellers of the set.

Abstract: The turbomachine comprises a stationary component, a rotary component, rotatingly supported in the stationary component, and a sealing arrangement between the rotary component and the stationary component. A cooling arrangement is further provided, which is configured and designed for delivering a cooling fluid to the sealing arrangement and removing heat therefrom.

Abstract: A magnetic bearing comprising a stator magnetic circuit secured to a stationary support device, the stator magnetic circuit comprising at least one coil and a ferromagnetic body placed in a protective annular support, the protective annular support leaving uncovered a surface of the ferromagnetic body and a surface of the at least one coil. The bearing also comprises at least one annular plug placed on the surface of the at least one coil which is left uncovered by the protective annular support, and the annular plug and the surface of the ferromagnetic body which is left uncovered by the protective annular support are coated by a protective layer.

Abstract: An impeller wheel assembly for a radial rotating machine, comprises a bladed hub portion of an impeller wheel, with a first radially outward facing, fluid deflecting surface having a curvature profile designed to deflect an axial fluid flow into a radial centrifugal flow, and comprising a deflector portion with a second radially outward facing, fluid deflecting surface. The second radially outward facing surface has a curvature profile designed to deflect a radial centripetal fluid flow into an axial fluid flow.

Abstract: A rotating machine comprises a shaft, a casing, at least one main magnetic bearing connected to the shaft for rotatably supporting said shaft inside the casing, at least one first and one second auxiliary rolling bearings positioned between the shaft and the casing to support axial and radial loads, and first and second axial abutment means positioned on the shaft to transmit axial loads to inner rings of the rolling bearings. The machine further comprises a spacer axially positioned between facing faces of the inner rings of said rolling bearings for the transmission of the axial loads between said inner rings, and at least a first axial retaining means positioned on the casing and located axially between facing faces of the outer rings for the transmission of the axial loads between at least one of said outer rings and the casing.

Abstract: A magnetic bearing assembly for a rotary machine having a rotor shaft, comprising a stator magnetic circuit secured to a stationary support element and comprising at least one body of ferromagnetic material and at least one coil, both being fitted in a protective annular housing leaving uncovered a surface of revolution of said ferromagnetic body and a surface of revolution of said one coil, the magnetic bearing assembly comprising an annular thrust collar secured to the rotor shaft and radially extending towards the stator magnetic circuit by a radial portion, said radial portion facing the uncovered surfaces of said ferromagnetic body and said one coil. The annular thrust collar comprises at least one flow channel.

Abstract: A rotating machine comprises a shaft, a casing, at least one main magnetic bearing connected to the shaft for rotatably supporting the shaft inside the casing, at least one auxiliary radial rolling bearing and at least one auxiliary axial rolling bearing which are disposed between the shaft and the casing to respectively support radial loads only and axial loads only.

Abstract: A magnetic bearing assembly for a rotary machine, having a rotor circuit and a stator magnetic circuit secured to a stationary support element having at least one body of ferromagnetic material and at least one coil, both being fitted in a protective annular housing leaving uncovered a surface of revolution of said ferromagnetic body and a surface of revolution of said one coil facing a surface of revolution of the rotor circuit. The bearing assembly comprises at least one row of blades secured on the rotor circuit.

Abstract: A jacketed magnetic bearing for a rotary machine having a rotor. The jacketed magnetic bearing comprises a stator magnetic circuit secured to a stationary support device, the stator magnetic circuit comprising at least one coil and a ferromagnetic body placed in a metallic protective enclosure. Said protective enclosure comprises an annular support and an annular jacket, the annular support and the annular jacket being welded together. The annular jacket comprises magnetic material and is coated by a protective layer.

Abstract: An impeller for a turbo-machine is provided. The impeller includes a metallic base having a back surface and a front surface opposite to the back surface; at least one blade extending on the front surface of the metallic base; a composite shroud attached to the at least one blade such that plural closed paths are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and a connector configured to attach the composite shroud to the metallic base or the at least one blade.

Abstract: A centrifugal compressor for processing a wet gas. The centrifugal compressor includes: a casing; and least one compressor stage comprising at least one impeller rotatingly arranged in the casing and provided with an impeller hub and a plurality of impeller blades, each impeller blade having a suction side and a pressure side. The at least one compressor stage comprises at least one droplet breaking arrangement configured for promoting breakup of liquid droplets flowing through the compressor stage.

Abstract: A multi-stage compressor is described, comprising a rotor having a plurality of axially stacked impellers and a tie rod extending through the stacked impellers and holding the impellers together. A gas compression path extends from a compressor inlet to a compressor outlet and through the impellers. A flow channel is provided between the tie rod and the stacked impellers. The flow channel develops along at least a portion of the tie rod. Hot gas is diverted from the compression path and flows through the flow channel to heat the tie rod during startup of the compressor.

Abstract: A centrifugal compressor including: a casing; at least one impeller supported for rotation in the casing and provided with a hub, a shroud and an impeller eye; an impeller-eye sealing arrangement, for sealing the impeller in the region of said impeller eye. The centrifugal compressor further includes at least one cooling-medium portlocated at the impeller-eye sealing arrangement, arranged for delivering a cooling medium around the impeller eye.

Abstract: An impeller for a turbo-machine and is provided. The impeller includes a metallic base having a central hole, a back surface and a front surface opposite to the back surface; at least one blade extending on the front surface of the metallic base; a composite shroud attached to the at least one blade such that plural closed paths or vanes are formed by the front surface of the metallic base, the at least one blade and the composite shroud; and a connector configured to attach the composite shroud to the metallic base or the at least one blade.

Abstract: A compressor end head for providing a thermal barrier near a mechanical seal includes an inner end head and an outer end head. The outer end head includes an opening in the center for enclosing the inner end head, an outlet and grooves alongside surfaces radially adjacent the opening. The inner end head has an opening in the center, an inlet, grooves in the opening for enclosing an end portion of a compressor shaft and a flow path along an outer surface.

Abstract: Systems and methods for attaching one or more impellers to a shaft and attaching composite rings to a back and front lip on each impeller to secure the impellers for high angular velocity operation. The composite rings are constructed of a material that provides a greater specific strength and greater specific stiffness relative to the material of the impellers. In multi-impeller assemblies, an impeller spacer is attached between each pair of impellers.