Abstract: This liquid/gas separator for centrifugal motor compressor includes a sump internally equipped with at least one gas separator stage suitable to separate a gaseous phase from a liquid phase accepted in the sump entry. The sump internally includes a compartment in which the gaseous phase is separated by a separator stage, and in which is assembled by a compressor stage of the motor compressor.

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: Embodiments of the present invention provide a magnetic bearing system comprising an axial bearing rotating flywheel arranged so as to magnetically interact with at least one fixed axial stop. The system includes a cooling fluid path configured so as to send the flow to the flywheel in a direction of flow being in a substantially radial plane relative to the axis of rotation of the flywheel.

Abstract: An auxiliary turbomachinery shaft-support system including a first assembly configured to axially support the shaft, the first assembly including a rotating disc having a part shaped to be torsionally coupled to the shaft, and a stator including at least one pad including at least one elastic component coupled with the pads and urging it in the direction of a disc sliding surface.

Abstract: A motorcompressor unit includes a first motor driving the rotation of a rotor and a compression stage including a bladed impeller mounted on a driven shaft, the rotation of which is driven by the rotor. Also, common casing is gastight with respect to fluid handled by the motorcompressor unit, where the compression stage and the first motor are mounted in the common casing. The compression stage also includes a regulating member that regulates the angle at which the fluid flows to or from the bladed impeller, and a second motor that controls the regulating member, the second motor being mounted in the common casing.

Abstract: A compressor unit is disclosed comprising at least a first motor driving in rotation at least one impeller of a compression stage, having at the outlet of the impeller a diffuser designed to centrifugally channel the gases coming from the impeller, and having a centripetal return channel downstream of the diffuser. The return channel includes at least one movable blade portion that, when moved, can vary a tangential component of the speed of the gases coming from the return channel.

Abstract: A compressor for a motor-compressor set, comprising, on a rotating shaft, a balancing piston, a set of bladed wheels, a rear cavity of the piston adjacent to the balancing piston on a side opposite to the set of bladed wheels, a regulation valve suitable for coupling the rear cavity to the input of the set of bladed wheels, a suction pressure chamber coupled to the input of the set of bladed wheels, the rear cavity being arranged between the balancing piston and the suction pressure chamber. The compressor comprises a discharge pressure chamber arranged between the rear cavity of the piston and the suction pressure chamber, the discharge pressure chamber being coupled via a discharge line to a discharge area between the set of bladed wheels and the balancing piston.

Abstract: An impeller designed to be mounted on a rotary shaft includes: a basic rim provided with blades protruding on one surface of the basic rim, and a hub capable of being coupled to the basic rim and to the rotary shaft. In certain embodiments, the impeller includes an annular plate and the hub, where the annular plate and the basic rim are configured to interact together so as to hold the basic rim axially and to maintain a freedom of radial deformation of the basic rim relative to the hub and to the annular plate.

Abstract: A centrifugal compressor unit includes a driving means for rotatably driving a rotor, and at least one compressor including a statoric body and an arrangement of blade wheels mounted on a shaft which is rotatably driven by the rotor in the statoric body. The group formed by the motor and/or each compressor being mounted in a common housing is sealed from the gas used by the compressor. The compressor unit also includes an arrangement of active bearings for axially and radially guiding the rotor and the driven shaft, and a means for cooling the driving means and the guiding bearings by withdrawing the gas used by the compressor at the outlet of a first compression stage. The cooling means includes a set of internal conduits for supplying the driving means and the bearings with cooling gas. The cooling gas flow in the motor and the cooling gas flow in the bearing is separated and then converge upstream of the first compression stage.

Abstract: A rotor structure is provided. The rotor structure includes a plurality of wheels, a main axial tie rod passing through the plurality of wheels and a first shaft and a second shaft each attached to one extremity of the main tie rod, wherein the main tie rod and the bore of an end wheel in contact with one of the first and second shafts delimit a hydraulic chamber configured to receive a hydraulic fluid, and wherein the main tie rod, the hydraulic chamber and the end wheel form an internal hydraulic tension device configured to preload the main tie rod.

Abstract: A diaphragm for the compression stage of a compressor includes least one set of through passages extending between two mutually opposite faces of the diaphragm, so as to create a flow of gas between the opposite faces depending on a pressure difference prevailing on either side of the diaphragm.

Abstract: A motor compressor unit (1) comprises a motor (3) and a compressor (2) which are mounted in a common housing (4) sealed against the gas to be compressed. The motor (3) comprises a rotor (39) rotatably connected to a rotor (38) of the compressor (2). The rotor (38) of the compressor comprises a main shaft (11) and a connecting shaft (21) coaxial with the main shaft, the connecting shaft being placed at least partly inside the main shaft (11) so as to be radially spaced from the main shaft (11) and comprising a coupling zone (15) for coupling with the main shaft (11).

Abstract: A compressor unit is disclosed comprising at least a first motor driving in rotation at least one impeller of a compression stage, having at the outlet of the impeller a diffuser designed to centrifugally channel the gases coming from the impeller, and having a centripetal return channel downstream of the diffuser. The return channel includes at least one movable blade portion that, when moved, can vary a tangential component of the speed of the gases coming from the return channel.

Abstract: One aspect of the invention provides a centrifugal compressor unit (1) comprising a first motor (3), at least one compressor (2) comprising a drive shaft (9) driven by the rotor (12) of the first motor (3) and a set of impellers (5, 6, 7, 8) mounted on the drive shaft (9). The first motor (3) and the compressor (2) are mounted in a gas-tight common housing (26) operated by the compressor unit (1). The rotor (12) of the first motor (3) and the drive shaft (9) are connected by a flexible coupling (24) placed in the housing (26). The compressor unit includes a second motor (4) that is placed in the housing and of which the rotor (13) is connected to the drive shaft (9) by a second flexible coupling (25).

Abstract: The invention provides an impeller designed to be mounted on a rotary shaft. The impeller comprises a basic rim provided with blades protruding on one surface of the basic rim, and a hub capable of being coupled to the basic rim and to the rotary shaft. In certain embodiments, the impeller comprises an annular plate and the hub, the plate and the basic rim are configured to interact together so as to hold the basic rim axially and to maintain a freedom of radial deformation of the basic rim relative to the hub and to the plate.

Abstract: This motorcompressor unit comprises at least one motor driving the rotation of a rotor and at least one compression stage comprising a set of bladed impellers mounted on a driven shaft the rotation of which is driven by the rotor, the assembly consisting of the motor and the or each compressor being mounted in a common casing that is gastight with respect to the gas handled by the compressor unit. At least one of the compression members comprises at least one aerodynamic member (13) for regulating the angle at which the gas handled by the said stage flows and a motor (16) for controlling the regulating member (13) mounted in the common casing.

Abstract: A motor compressor unit (1) comprises a motor (3) and a compressor (2) which are mounted in a common housing (4) sealed against the gas to be compressed. The motor (3) comprises a rotor (39) rotatably connected to a rotor (38) of the compressor (2). The rotor (38) of the compressor comprises a main shaft (11) and a connecting shaft (21) coaxial with the main shaft, the connecting shaft being placed at least partly inside the main shaft (11) so as to be radially spaced from the main shaft (11) and comprising a coupling zone (15) for coupling with the main shaft (11).

Abstract: Centrifugal compressor unit (1) comprising a first motor (3), at least one compressor (2) comprising a drive shaft (9) driven by the rotor (12) of the first motor (3) and a set of impellers (5, 6, 7, 8) mounted on the drive shaft (9), the assembly consisting of the motor (3) and the compressor (2) being mounted in a gas-tight common housing (26) operated by the compressor unit (1), the rotor (12) of the first motor (3) and the drive shaft (9) being connected by a flexible coupling (24) placed in the housing (26). The compressor unit comprises a second motor (4) which is placed in the housing and of which the rotor (13) is connected to the drive shaft (9) by a second flexible coupling (25).

Abstract: This compressor unit comprises a motor (34) and at least one compressor (44) comprising a driven shaft (54) driven by the rotor of the motor and bladed wheels fitted on the driven shaft (54), the assembly composed of the motor and the compressor being installed in a common casing (55) leak tight to the gas manipulated by the compressor unit. The rotor and the driven shaft are connected through a flexible coupling (72) placed in the casing.

Abstract: A seal for a rotary compressor comprises a casing, at least one assembly having a rotating seal face ring which rotates as one with a sleeve intended to be mounted on a shaft of the compressor and of a stationary seal face ring mounted on the casing, the seal face rings being urged to press against one another via their rubbing face. The seal design further incorporates fluid circulation for heating leaks of compressible fluid conveyed by the compressor that occur between the seal face rings, this fluid circulation being formed in the casing and extending at least partially downstream of the seal face rings with respect to the direction of flow of the fluid stream.