TURBOMACHINE WITH A COOLED COUPLING GUARD

A coupling guard for a rotating member comprising a shell surrounding the rotating member, a plenum disposed in the shell, at least an injection tube for injecting a cooling gas and an outlet for discharging the cooling gas, wherein the injection tube extends through the plenum from a first axial opening proximal to the shell to a second axial opening proximal to the rotating member, the injection tube having a leading edge which first contacts the gas circulating in the plenum and a trailing edge opposite to the leading edge, the second opening having a first portion orthogonal to the axis of the injection tube and a second portion across the trailing edge, adjacent to the first portion and parallel to the axis of the injection tube. 1. A rotating machine comprising a rotating member and a coupling guard , the coupling guard comprising:a shell surrounding the rotating member,a plenum disposed in the shell; andat least an injection tube for injecting a cooling gas and an outlet for discharging the cooling gas so that rotation of the rotating member draws cooling gas through the injection tube and into the plenum,wherein the cooling gas circulates through the plenum substantially circularly or spirally to cool the shell before the cooling gas exhausts through the outlet; andwherein the injection tube extends radially through the plenum from a first opening proximal to the shell to a second opening proximal to the rotating member, the injection tube having a leading edge which first contacts the cooling gas circulating in the plenum and a trailing edge opposite to the leading edge, the second opening having a first portion oriented substantially tangentially and substantially parallel to the circulation direction of the cooling gas and a second portion oriented substantially radially and substantially orthogonal to the circulation direction of the cooling gas.2. The coupling guard according to claim 1 , wherein the first portion faces in a direction concurrent to the ...

METHODS AND SYSTEMS FOR CONTROLLING TURBOCOMPRESSORS

A method for regulating a turbocompressor to prevent surge, is described. The method comprises the following steps: providing at least one surge limit line of turbocompressor; continuously determining an actual value of a corrected speed of the turbocompressor; continuously determining at least a maximum admissible pressure ratio on the surge limit line, corresponding to the actual value of the corrected speed; continuously determining an actual pressure ratio; acting upon an antisurge arrangement, if the actual pressure ratio is equal to or higher than the maximum admissible pressure ratio. 1. A method for regulating a turbocompressor to prevent surge , comprising the following steps:providing at least one surge limit line and/or at least one choke line of said turbocompressor;determining continuously an operating point of the compressor measuring a processing gas temperature at a compressor inlet, the rotary speed of the compressor, a delivery pressure value and a suction pressure value;continuously determining an actual value of a corrected speed of the turbocompressor, the corrected speed being proportional to a ratio of the rotary speed to a square root of the processing gas temperature;continuously determining at least a maximum admissible pressure ratio on said surge limit line and/or at least a minimum admissible pressure ratio on said choke line, corresponding to the actual value of the corrected speed;continuously determining an actual pressure ratio, equal to a ratio between the delivery pressure value and the suction pressure value; andacting upon an antisurge arrangement to recirculate a fraction of a the compressed gas in the compressor through a suction line, if the actual pressure ratio is equal to or higher than the maximum admissible pressure ratio or equal to or lower than the minimum admissible pressure ratio.2. The method of claim 1 , further comprising the step of calculating a surge parameter defined as a ratio ofthe maximum admissible ...

ROTATING MACHINERY WITH ADAPTIVE BEARING JOURNALS AND METHODS OF OPERATING

A method for operating a rotating machinery comprising a rotor, a rotor shaft, and at least one journal bearing supporting the rotor shaft is disclosed. The bearing comprises a bearing housing, a bearing surface in the bearing housing, a sleeve torsionally and axially fitted on the shaft, and a lubrication oil film filling a clearance between the outer surface of the sleeve and the bearing surface. The method comprises the step of modifying the clearance by modifying a radial dimension of the outer surface of the sleeve as a function of a rotation speed of the shaft. 1. A method for operating a rotating machinery comprising a rotor , a rotor shaft , and at least one journal bearing supporting said rotor shaft and comprised of a bearing housing , a bearing surface in said bearing housing , a sleeve torsionally and axially fitted on the shaft , said sleeve having an outer surface facing said bearing surface and an inner surface facing the shaft , and a lubrication oil film filling a clearance between the outer surface of the sleeve and the bearing surface; said method comprising the step of modifying said clearance by modifying a radial dimension of the outer surface of the sleeve as a function of a rotation speed of the shaft.2. The method of claim 1 , wherein said step of modifying the clearance comprises the steps of: increasing a rotation speed of the shaft from a first rotation speed to a second rotation speed claim 1 , reducing said clearance while increasing the rotation speed.3. The method of claim 2 , wherein said step of increasing the rotation speed between the first rotation speed and the second rotation speed comprises crossing at least one critical rotation speed of the rotor.4. The method of claim 1 , wherein the step of modifying the clearance comprises the steps of: reducing the rotation speed of the shaft from a second rotation speed to a first rotation speed; and increasing said clearance while reducing the rotation speed.5. The method of claim 4 , ...

COMPRESSOR, SEAL GAS DELIVERY, AND METHOD

A seal gas delivery system for an end seal on a turbo machine rotor shaft includes a seal gas passageway for delivering a seal gas to the end seal and a seal gas distributor for receiving at least a portion of the seal gas from the seal gas passageway, the seal gas distributor having a plurality of holes for distributing the seal gas about the rotor shaft during turbo machine standstill; the holes are located on a cylindrical surface and are typically arranged all around said rotor shaft, preferably regularly all around said rotor shaft. 1. A seal gas delivery system for an end seal on a turbo machine rotor shaft , the seal gas delivery system comprising:a seal gas passageway for delivering a seal gas to the end seal;a seal gas distributor for receiving at least a portion of the seal gas from the seal gas passageway, the seal gas distributor comprising a plurality of holes for distributing the seal gas about the rotor shaft during turbo machine standstill,wherein the holes are located on a cylindrical surface.2. The seal gas delivery system of claim 1 , wherein the holes are arranged circularly.3. The seal gas delivery system of claim 1 , wherein the holes are arranged around the rotor shaft.4. The seal gas delivery system of claim 1 , wherein the holes are spaced apart relative to a circumferential surface of the rotor shaft.5. The seal gas delivery system of claim 1 , wherein the holes are spaced apart relative to a longitudinal surface of the rotor shaft.6. The seal gas delivery system of claim 1 , wherein each of the holes defines an axis and the axis is at a non-zero angle relative to a radial line extending from a longitudinal axis of the rotor shaft through a center of the each of the holes.7. The seal gas delivery system of claim 6 , wherein a labyrinth seal is disposed proximately of the end seal claim 6 , and the seal gas distributor further comprises a ring portion extending from the labyrinth seal.8. The seal gas delivery system of claim 5 , wherein the ...

A TURBOMACHINERY GASKET AND A TURBOMACHINERY PROVIDED WITH SAID GASKET

A turbomachinery gasket comprising at least a first curved elongated element having a coupling part configured to cooperate with a tubular assembly in order to keep the gasket in position on the tubular assembly, and an outer surface configured to seal against an outer casing provided to house the tubular assembly, the first curved elongated element comprising a first and a second free end, the first free end providing a first protruding lip and the second free end providing a second protruding lip, the first protruding lip being configured to overlap with the second protruding lip of the first curved elongated element or with a second protruding lip of a second elongated element functionally identical to the first one, so that, when the gasket is in use, a seal in that part of the gasket having said protruding lips is granted. 1. A turbomachinery gasket comprising:at least a first curved elongated element having a coupling part configured to cooperate with a tubular assembly in order to keep the gasket in position on the tubular assembly, andan outer surface configured to seal against an outer casing to house the tubular assembly, the first curved elongated element comprising a first and a second free end, the first free end comprising a first protruding lip and the second free end comprising a second protruding lip, the first protruding lip being configured to overlap with the second protruding lip of the first curved elongated element or with a second protruding lip of a second elongated element functionally identical to the first one, so that, when the gasket is in use, a seal in that part of the gasket having said protruding lips is obtained.2. The turbomachinery gasket of claim 1 , further comprising a plurality of curved elongated elements functionally identical each other claim 1 , that claim 1 , when assembled claim 1 , form a sealing ring.3. The turbomachinery gasket of claim 1 , wherein the first coupling part is configured to cooperate in undercut manner ...

DRY GAS SEAL

A dry gas seal for sealing the shaft of a turbomachinery, provided with means for the continuous health monitoring of the dry gas seal comprising one or more sensors adapted to measure strains and/or loads induced to the primary ring of the dry gas seal and/or strains induced to one or more of the elastic elements coupled to the primary ring and/or adapted to measure displacements of the primary ring or of an element coupled to the primary ring, for an early detection of failure of the seal, thus enabling main failures early detection capability and proactive maintenance actions. 1. A dry gas seal for sealing the shaft of a turbomachinery , the seal comprising:a mating ring configured to be coupled to the shaft of the turbomachinery to rotate at shaft rotational speed;a primary ring that seals against the mating ring, the primary ring configured to be anti-rotationally coupled to a static part of the turbomachinery; andone or more elastic elements preloaded to push the primary ring against the mating ring,wherein one or more sensors are provided, said one or more sensors being adapted to measure strains and/or loads induced to the primary ring and/or to one or more of the elastic elements and/or displacements of the primary ring or of an element coupled to the primary ring for an early detection of failure of the seal.2. The seal according to claim 1 , wherein the primary ring is configured to be anti-rotationally coupled with a retainer through an anti-rotational system comprising one or more anti-rotational pin or lug claim 1 , the sensors comprising a load sensor coupled to one or more of such anti-rotational pin or lug to detect torques induced to the primary ring.3. The seal according to claim 1 , wherein sensors comprise an axial vibration sensor to detect axial movements of the primary ring and/or the retainer towards/from the mating ring.4. The seal according to claim 1 , wherein the elastic element or elements are coupled to the primary ring through an ...

A turbomachinery gasket and a turbomachinery provided with said gasket

A turbomachinery gasket (20) comprising at least a first curved elongated element having a coupling part (22) configured to cooperate with a tubular assembly (30) in order to keep the gasket (20) in position on the tubular assembly (30), and an outer surface configured to seal against an outer casing provided to house the tubular assembly (30), the first curved elongated element comprising a first and a second free end, the first free end providing a first protruding lip and the second free end providing a second protruding lip, the first protruding lip being configured to overlap with the second protruding lip of the first curved elongated element or with a second protruding lip of a second elongated element functionally identical to the first one, so that, when the gasket is in use, a seal in that part of the gasket having said protruding lips is granted.

Methods and systems for controlling turbocompressors

A method for regulating a turbocompressor to prevent surge, is described. The method comprises the following steps: providing at least one surge limit line (SLL) of turbocompressor (21); continuously determining an actual value of a corrected speed (Nc) of the turbocompressor (21); continuously determining at least a maximum admissible pressure ratio (PRmax) on the surge limit line, corresponding to the actual value of the corrected speed; continuously determining an actual pressure ratio (PR); acting upon an antisurge arrangement, if the actual pressure ratio is equal to or higher than the maximum admissible pressure ratio.

Rotating machinery with adaptive bearing journals and methods of operating

A method for operating a rotating machinery comprising a rotor, a rotor shaft (1), and at least one journal bearing (5) supporting the rotor shaft (1) is disclosed. The bearing (5) comprises a bearing housing (7), a bearing surface in the bearing housing, a sleeve (13) torsionally and axially fitted on the shaft (1), and a lubrication oil film filling a clearance between the outer surface of the sleeve (13) and the bearing surface. The method comprises the step of modifying the clearance by modifying a radial dimension of the outer surface of the sleeve (13) as a function of a rotation speed of the shaft (1).

Turbomachine with a cooled coupling guard

A coupling guard (1) for a rotating member (15) comprises: a shell (11) surrounding the rotating member (15), a plenum (25) disposed in the shell (11), at least an injection tube (12) for injecting a cooling gas and an outlet (13) for discharging the cooling gas, wherein said injection tube (12) extends through said plenum (25) from a first axial opening (31) proximal to said shell (11) to a second axial opening (32) proximal to said rotating member (15), said injection tube (12) having a leading edge (41) which first contacts the gas circulating in the plenum and a trailing edge (42) opposite to the leading edge (41), said second opening (32) having a first portion (32a) orthogonal to the axis (X) of said injection tube (12) and a second portion (32b) across said trailing edge (42), adjacent to said first portion (32a) and parallel to the axis (X) of said injection tube (12).

Dry gas seal

A dry gas seal (30) for sealing the shaft (14) of a turbomachinery, provided with means for the continuous health monitoring of the dry gas seal (30) comprising one or more sensors adapted to measure strains and/or loads induced to the primary ring (36) of the dry gas seal (30) and/or strains induced to one or more of the elastic elements coupled to the primary ring (36) and/or adapted to measure displacements of the primary ring (36) or of an element coupled to the primary ring (36), for an early detection of failure of the seal (30), thus enabling main failures early detection capability and proactive maintenance actions.

Dry gas seal

A dry gas seal for sealing the shaft of a turbomachinery, provided with means for the continuous health monitoring of the dry gas seal comprising one or more sensors adapted to measure strains and/or loads induced to the primary ring of the dry gas seal and/or strains induced to one or more of the elastic elements coupled to the primary ring and/or adapted to measure displacements of the primary ring or of an element coupled to the primary ring, for an early detection of failure of the seal, thus enabling main failures early detection capability and proactive maintenance actions.

Compressor, seal gas delivery, and method.

Un sistema de suministro de gas de sellado para un sello extremo en el eje de rotor de una turbomáquina, incluye un pasaje de gas de sellado (122) para suministrar un gas de sellado al sello extremo, y un distribuidor de gas de sellado (140) para recibir por lo menos una porción del gas de sellado desde el pasaje de gas de sellado (122), el distribuidor de gas de sellado (140) tiene una pluralidad de agujeros (160) para distribuir el gas de sellado alrededor del eje de rotor (120) durante una parada de la turbomáquina; los agujeros se localizan en una superficie cilíndrica y típicamente están dispuestos en todo alrededor de dicho eje del rotor, de preferencia de manera regular en todo el derredor de dicho eje del rotor.

Rotating machinery with adaptive bearing journals and methods of operating

A method for operating a rotating machinery comprising a rotor, a rotor shaft, and at least one journal bearing supporting the rotor shaft is disclosed. The bearing comprises a bearing housing, a bearing surface in the bearing housing, a sleeve torsionally and axially fitted on the shaft, and a lubrication oil film filling a clearance between the outer surface of the sleeve and the bearing surface. The method comprises the step of modifying the clearance by modifying a radial dimension of the outer surface of the sleeve as a function of a rotation speed of the shaft.

Compressor, seal gas delivery, and method

A seal gas delivery system for an end seal on a turbo machine rotor shaft includes a seal gas passageway (122) for delivering a seal gas to the end seal and a seal gas distributor (140) for receiving at least a portion of the seal gas from the seal gas passageway (122), the seal gas distributor (140) having a plurality of holes (160) for distributing the seal gas about the rotor shaft (120) during turbo machine standstill; the holes are located on a cylindrical surface and are typically arranged all around said rotor shaft, preferably regularly all around said rotor shaft.

Balance piston for a centrifugal compressor

Rotating machinery with adaptive bearing journals and methods of operating

A method for operating a rotating machinery comprising a rotor, a rotor shaft (1), and at least one journal bearing (5) supporting the rotor shaft (1) is disclosed. The bearing (5) comprises a bearing housing (7), a bearing surface in the bearing housing, a sleeve (13) torsionally and axially fitted on the shaft (1), and a lubrication oil film filling a clearance between the outer surface of the sleeve (13) and the bearing surface. The method comprises the step of modifying the clearance by modifying a radial dimension of the outer surface of the sleeve (13) as a function of a rotation speed of the shaft (1).

Turbomachine with a cooled coupling guard

A coupling guard for a rotating member comprising a shell surrounding the rotating member, a plenum disposed in the shell, at least an injection tube for injecting a cooling gas and an outlet for discharging the cooling gas, wherein the injection tube extends through the plenum from a first axial opening proximal to the shell to a second axial opening proximal to the rotating member, the injection tube having a leading edge which first contacts the gas circulating in the plenum and a trailing edge opposite to the leading edge, the second opening having a first portion orthogonal to the axis of the injection tube and a second portion across the trailing edge, adjacent to the first portion and parallel to the axis of the injection tube.

Sealing system with extra pressure protection, machine and method

The sealing system (100) for a rotary shaft (190) of a machine is configured to separate a first zone (110) surrounding a first portion (191) of the rotary shaft (190) and a second zone (120) surrounding a second portion (192) of the rotary shaft (190). The sealing system (100) comprises a sealing member (130), located between the first portion (191) of the rotary shaft (190) and the second portion (192) of the rotary shaft (190), and a support member (135), which supports the sealing member (130). The support member (135) is configured to perform a movement at least in an axial direction due to a pressure difference between the first zone (110) and the second zone (120), and to close a gap (150), defined between the sealing system (100), in particular between the sealing member (130), and the rotary shaft (190), when the pressure difference is higher than a predetermined value.

Dry gas seal

Sistema di tenuta con protezione contro le sovrappressioni, macchina e metodo

Tørgastætning

Pistone di bilanciamento per compressori centrifughi con tenuta a cellette a gioco divergente

Balanseringsstempel for sentrifugalkompressorer

Sealing system with extra pressure protection, machine and method

The sealing system (100) for a rotary shaft (190) of a machine is configured to separate a first zone (110) surrounding a first portion (191) of the rotary shaft (190) and a second zone (120) surrounding a second portion (192) of the rotary shaft (190). The sealing system (100) comprises a sealing member (130), located between the first portion (191) of the rotary shaft (190) and the second portion (192) of the rotary shaft (190), and a support member (135), which supports the sealing member (130). The support member (135) is configured to perform a movement at least in an axial direction due to a pressure difference between the first zone (110) and the second zone (120), and to close a gap (150), defined between the sealing system (100), in particular between the sealing member (130), and the rotary shaft (190), when the pressure difference is higher than a predetermined value.