CENTRIFUGAL COMPRESSOR WITH LEAKAGE-FREE DIFFUSER BLADES AND METHOD OF ASSEMBLING A CENTRIFUGAL COMPRESSOR

A centrifugal compressor (100) comprises a rotor (103, 104, 105) with a plurality of impellers (104, 105) and a stator (101, 102, 106, 107, 108, 109, 110) with at least a first diaphragm (106), a second diaphragm (107, 108), a diffuser defined between a shroud side of a downstream portion (106) of the first diaphragm and a hub side of a upstream portion (107) of the second diaphragm, and a plurality of diffuser blades (110) inside the diffuser; each diffuser blade (110) has a tip portion, a base portion and an airfoil portion; the diffuser blades (110) are located between the downstream portion (106) of the first diaphragm and the upstream portion (107) of the second diaphragm; the base portion (HOB) of the diffuser blades (110) is integrated in or mounted directly or indirectly to the upstream portion (107) of the second diaphragm, and the tip portion (HOT) of the diffuser blades (110) abuts against the downstream portion (106) of the first diaphragm; alternatively, the base portion (130B ...

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.

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).

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).

BEARING SYSTEM AND TURBO MACHINE HAVING ROTATABLE BUSH

The present invention relates to a bearing system and a turbo machine having a rotatable bush. The bearing system (600) comprises: a fluid bearing (610); a shaft (620) having a solid portion (624); and a bush (630) positioned about the solid portion (624) and in front of a pad of the fluid bearing (610) or pads (612). The bush (630) includes: a hollow portion (632); and a plurality of support elements (634) for securing the hollow portion (632) of the bush (630) to the solid portion (624) of the shaft (620). COPYRIGHT KIPO 2018 ...

METHOD FOR STABILIZING TRANSVERSAL OSCILLATIONS OF A ROTOR

A method for stabilizing transversal oscillations of a rotor including the steps of acquiring a first signal representing a value of transversal oscillations of a rotor; estimating a value of a thermal gradient from the first signal; computing a value of an actuation parameter from the value of thermal gradient; emitting an actuation signal representing the value of the actuation parameter.

METHOD FOR UNIFORMING TEMPERATURE IN A SHAFT SUPPORTED BY A FLUID BEARING, BEARING SYSTEM AND TURBOMACHINE

The method is used for uniforming temperature in a shaft supported by a fluid bearing during rotation of the shaft; a journal portion of the shaft is located inside the fluid bearing; at least one passage is provided inside the shaft at least along the journal portion so to cross it; at least one flow of heat-exchange fluid is established in the at least one passage; the method allows to overcome the problems due to the “Morton effect”. A bearing system implementing the method is advantageously used in a turbomachine.

Method for uniforming temperature in a shaft supported by a fluid bearing, bearing system and turbomachine

The method is used for uniforming temperature in a shaft supported by a fluid bearing during rotation of the shaft; a journal portion of the shaft is located inside the fluid bearing; at least one passage is provided inside the shaft at least along the journal portion so to cross it; at least one flow of heat-exchange fluid is established in the at least one passage; the method allows to overcome the problems due to the “Morton effect”. A bearing system implementing the method is advantageously used in a turbomachine.

CENTRIFUGAL COMPRESSOR WITH LEAKAGE-FREE DIFFUSER BLADES AND METHOD OF ASSEMBLING A CENTRIFUGAL COMPRESSOR

A centrifugal compressor includes a rotor with a plurality of impellers and a stator with at least a first diaphragm, a second diaphragm, a diffuser, and a plurality of diffuser blades inside the diffuser; each diffuser blade has a tip portion, a base portion and an airfoil portion; and are located between the downstream portion of the first diaphragm and the upstream portion of the second diaphragm; the base portion of the diffuser blades is integrated in or mounted to the upstream portion of the second diaphragm, and the tip portion of the diffuser blades abuts against the downstream portion of the first diaphragm; alternatively, the base portion of the diffuser blades is integrated in or mounted to the downstream portion of the first diaphragm, and the tip portion of the diffuser blades abuts against the upstream portion of the second diaphragm.

Bearing system with a rotary bush and turbomachine

The bearing system includes a fluid bearing, a shaft with a solid portion, and a bush located around the solid portion and in front of pad or pads of the fluid bearing; the bush includes a hollow portion and a plurality of supporting elements that fix the hollow portion of the bush to the solid portion of the shaft.

Method for stabilizing transversal oscillations of a rotor

A method for stabilizing transversal oscillations of a rotor including the steps of acquiring a first signal representing a value of transversal oscillations of a rotor; estimating a value of a thermal gradient from the first signal; computing a value of an actuation parameter from the value of thermal gradient; emitting an actuation signal representing the value of the actuation parameter.

CONNECTORS FOR CONDUITS

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween. 1. A connector to be provided at a terminal end of a breathing conduit , the connector comprising:a body, the body comprising a first end and a second end, the body internally defining a lumen for the passage of gas therethrough between each of the first and second ends,the first end, in use, being engaged or engageable with the terminal end of the breathing conduit or a component to be associated with the terminal end of the breathing conduit, andthe second end, in use, to be engaged or engageable with another connector, andwherein an internal surface of the body comprises one or more internal connection features configured for connection with said another connector which may be received internally therein, andwherein an external surface of the body comprises one or more external alignment feature(s) configured for aligning said connector or another connector into an externally aligned connection therebetween2. The connector of claim 1 , wherein one or more external visual aid(s) is/are configured for claim 1 , in use claim 1 , providing an externally visible guide for alignment of said connector or another connector into an ...

Method for stabilizing transversal oscillations of a rotor

A method for stabilizing transversal oscillations of a rotor including the steps of acquiring a first signal representing a value of transversal oscillations of a rotor; estimating a value of a thermal gradient from the first signal; computing a value of an actuation parameter from the value of thermal gradient; emitting an actuation signal representing the value of the actuation parameter.

SWIVEL CONNECTOR

A connector is described that may be configured to connect between a first tube and a second tube. The connector has an internal component and an external component. The external component has a first end and a second end. The first end has an external taper and an internal coupling face that may be configured to interact with the first tube and the second end may be configured to interact with the second tube. The internal component may be configured to rotate independently to the external component. The external component has a gripping region to aid the user in disconnection of the connector. An attachment mechanism may attach the second tube to the internal component. 1. A connector for a medical tube or a breathing tube for a respiratory assistance system , comprising:an internal component and an external component,wherein the internal component has a first end and a second end, and the external component has a corresponding a first end and a second end,the first end of the external component comprising an external coupling face and an internal coupling face, andthe second end of the internal component comprising an attachment mechanism configured to attach to a tube, andwherein the internal component is configured to rotate independently to the external component.2. A connector as claimed in claim 1 , wherein the external component is a unitary or monolithic or single-piece construction.3. A connector as claimed in claim 1 , wherein the external component is a two-piece construction claim 1 , said construction comprising a first piece and a second piece provided in a permanent attachment arrangement with each other once attached to each other.4. A connector as claimed in claim 1 , wherein the external component comprises a gripping region.5. A connector as claimed in claim 1 , wherein the external coupling face is configured to connect to a first coupling interface and the internal coupling face is configured to connect to a second coupling interface.6. A ...

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 , ...

BREATHING ASSISTANCE APPARATUS

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage. 1. A bearing mount for supporting a bearing , the bearing mount comprising:an annular body,a collar extending concentrically with the annular body and outwardly from the annular body, the collar having a narrower outer diameter than an outer diameter of the annular body forming a recess between the annular body and the collar,a central bore extending through the annular body and the collar, the central bore having a wall and a ledge extending radially inwardly from the wall of the central bore,the ledge being disposed near one end of the central bore and the collar being disposed near another end of the central bore,wherein the bearing mount is arranged to receive the bearing in the central bore such that the bearing is radially supported by the inner surface of the bearing mount, and axially supported by the ledge, andwherein at least part of the bearing mount is arranged to flex or resiliently deform when a force is applied to the bearing mount to reduce the amount of the force that is translated to the bearing.2. A bearing mount according to claim 1 , wherein the at least part of the bearing mount is arranged to flex or resiliently deform such that the collar moves in a direction generally parallel to the bearing rotational axis when the force is applied to the bearing mount.3. A bearing mount according to claim 1 , wherein the at least part of the bearing mount is arranged to flex or resiliently deform when a force is applied to the bearing mount such that the force translated to the bearing retained in the central bore ...

BREATHING ASSISTANCE APPARATUS

There is provided an apparatus for delivering a flow of gas having a controller, a housing defining a gasflow passage, a motor with an impeller to deliver gas through the gasflow passage, and a flexible printed circuit electrically connected to the motor for electrically connecting the motor to the controller. There is also provided an apparatus for delivering a flow of gas having a housing defining a gasflow passage. The gas flowing through the gasflow passage is a high concentration oxygen gas. The apparatus has a motor with windings and an impeller to deliver gas through the gasflow passage, and an elastomeric shield to pneumatically isolate the windings from the gasflow passage. 1. A blower for an apparatus for delivering a flow of gas , the blower comprising:a casing including at least one casing ledge and at least one flexible or resilient member,a stator including a first stator ledge and a second stator ledge,wherein the at least one casing ledge supports the first stator ledge, and the at least one flexible or resilient member supports the second stator ledge.2. The blower of claim 1 , further comprising:a casing cap operatively connected to the casing, anda vibration isolating member located between the stator and the casing cap arranged to bias the stator in a direction towards the first stator ledge.3. The blower of claim 2 , wherein the vibration isolating member is compressible.4. The blower of claim 2 , wherein the vibration isolating member comprises an elastomeric material.5. The blower of claim 4 , wherein the elastomeric material is silicone.6. The blower of claim 1 , wherein the at least one flexible or resilient member is configured to flex beyond a periphery of the stator to allow removal of the stator from the casing.7. The blower of claim 1 , wherein the casing includes a top casing and a bottom casing claim 1 , which engage around their respective peripheries claim 1 , with a partition between the top casing and the bottom casing.8. The ...

Breathing assistance apparatus

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage.

Breathing assistance apparatus

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage.

Breathing assistance apparatus

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage.

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).

Connectors for conduits

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween.

Connectors for conduits

Connectors for conduits

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween.

Connectors for conduits

【課題】有用な選択肢を提供するコネクタ、または複数のコネクタのシステムを提供すること。【解決手段】本発明は、呼吸導管の終端部と直接、またはそれと関連する構成要素を介してのいずれかで、流体連通または係合して設けられるコネクタに関する。少なくとも一実施形態では、コネクタは、第１の端部および第２の端部、および端部間にガスを通過させるための内部ルーメンを有する本体を含む。第１の端部は、導管の終端部と、またはそれと関連する構成要素と係合可能である。第２の端部は別のコネクタと係合可能である。第２の端部にある本体の内面は、内部に受け入れられる別のコネクタと接続するための内部接続特徴を含む。本体の外面は、コネクタまたは別の接続を、それらの間を接続するために、位置合わせされた向きに位置合わせするための１つ以上の外部位置合わせ特徴を含む。【選択図】図２１

Swivel connector

A connector is described that may be configured to connect between a first tube and a second tube. The connector has an internal component and an external component. The external component has a first end and a second end. The first end has an external taper and an internal coupling face that may be configured to interact with the first tube and the second end may be configured to interact with the second tube. The internal component may be configured to rotate independently to the external component. The external component has a gripping region to aid the user in disconnection of the connector. An attachment mechanism may attach the second tube to the internal component.

Breathing assistance apparatus

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage.

Leje med puder med kølende mikrokanaler deri, og fremgangsmåde

A bearing with pads having cooling micro-channels therein, and method

The bearing has a housing and a plurality of pads coupled with the housing. The pads form bearing surfaces facing a shaft receiving space. The pads are provided with cooling micro-channels formed therein, adapted to circulate lubrication fluid and improve heat removal.

Bearing with pads having cooling micro-channels therein, and method

The bearing has a housing and a plurality of pads coupled with the housing. The pads form bearing surfaces facing a shaft receiving space. The pads are provided with cooling micro-channels formed therein, adapted to circulate lubrication fluid and improve heat removal.

Method for uniforming temperature in a shaft supported by a fluid bearing, bearing system and turbomachine

The method is used for uniforming temperature in a shaft (610) supported by a fluid bearing (620) during rotation of the shaft (610); a journal portion (611) of the shaft (610) is located inside the fluid bearing (620); at least one passage (614) is provided inside the shaft (610) at least along the journal portion (611) so to cross it; at least one flow of heat-exchange fluid (HEF) is established in the at least one passage (614) and the or each passage (614) is defined by a corresponding groove covered by a sleeve (616). The method allows to overcome the problems due to the "Morton effect". A bearing system (600) implementing the method is advantageously used in a turbomachine.

Method for uniforming temperature in a shaft supported by a fluid bearing, bearing system and turbomachine

The method is used for uniforming temperature in a shaft (610) supported by a fluid bearing (620) during rotation of the shaft (610); a journal portion (611) of the shaft (610) is located inside the fluid bearing (620); at least one passage (614) is provided inside the shaft (610) at least along the journal portion (611) so to cross it; at least one flow of heat-exchange fluid (HEF) is established in the at least one passage (614) and the or each passage (614) is defined by a corresponding groove covered by a sleeve (616). The method allows to overcome the problems due to the "Morton effect". A bearing system (600) implementing the method is advantageously used in a turbomachine.

sistema de mancal e turbomáquina

trata-se de um sistema de mancal (600) que compreende um mancal fluido (610), uma haste (620) com uma porção sólida (624) e uma bucha (630) localizada em volta da dita porção sólida (624) e na frente do coxim ou coxins (612) do mancal fluido (610); a bucha (630) compreende uma porção oca (632) e uma pluralidade de elementos de sustentação (634) que fixam a porção oca (632) da bucha (630) à porção sólida (624) da haste (620).

Connector for a breathing circuit

Connector for a breathing circuit

Metodo per stabilizzare le oscillazioni trasversali di un rotore.

Method for stabilizing transversal oscillations of a rotor

A method for stabilizing transversal oscillations of a rotor (2) comprises the steps of acquiring a first signal (S_vib) representing a value of transversal oscillations of a rotor (2); estimating a value of a thermal gradient (Grad_T) from the first signal (S_vib); computing a value of an actuation parameter (P_act) from the value of thermal gradient (Grad_T); emitting an actuation signal (S_act) representing the value of the actuation parameter.

Method for stabilizing transversal oscillations of a rotor

A method for stabilizing transversal oscillations of a rotor (2) comprises the steps of acquiring a first signal (S_vib) representing a value of transversal oscillations of a rotor (2); estimating a value of a thermal gradient (Grad_T) from the first signal (S_vib); computing a value of an actuation parameter (P_act) from the value of thermal gradient (Grad_T); emitting an actuation signal (S_act) representing the value of the actuation parameter.

Breathing assistance apparatus

An apparatus for delivering a flow of gas having: a controller; a housing defining a gas-flow passage flowing a high concentration oxygen gas; a motor with windings, resilient bearing mounts and an impeller to deliver the gas through the gas-flow passage; a flexible printed circuit electrically connecting the motor to the controller and sensor system; and an elastomeric shield to pneumatically isolate the windings from the gas-flow passage.

A bearing with pads having cooling micro-channels therein, and method

The bearing has a housing and a plurality of pads coupled with the housing. The pads form bearing surfaces facing a shaft receiving space. The pads are provided with cooling micro-channels formed therein, adapted to circulate lubrication fluid and improve heat removal.

Connectors for conduits

Connectors for conduits

Breathing assistance apparatus

There is provided an apparatus for delivering a flow of gas having a controller, a housing defining a gasflow passage, a motor with an impeller to deliver gas through the gasflow passage, and a flexible printed circuit electrically connected to the motor for electrically connecting the motor to the controller. There is also provided an apparatus for delivering a flow of gas having a housing defining a gasflow passage. The gas flowing through the gasflow passage is a high concentration oxygen gas. The apparatus has a motor with windings and an impeller to deliver gas through the gasflow passage, and an elastomeric shield to pneumatically isolate the windings from the gasflow passage.

Connectors for conduits

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween.

Connectors for conduits

This invention relates to connectors to be provided into fluid communication or engagement either directly with, or via a component to be associated with, a terminal end of a breathing conduit. In at least one embodiment, the connector comprises a body having a first end and a second end, and an internal lumen for the passage of gas between the ends. The first end engageable with a terminal end of a conduit or a component to be associated therewith. The second end engageable with another connector. An internal surface of the body at the second end comprises internal connection features for connection with another connector to be received internally therein. An external surface of the body comprises one or more external alignment feature(s) for aligning the connector or another connection into an aligned orientation for connection therebetween.

compressor centrífugo e método de montagem de um compressor centrífugo

trata-se de um compressor centrífugo (100) que compreende um rotor (103, 104, 105) com uma pluralidade de impulsores (104, 105) e um estator (101, 102, 106, 107, 108, 109, 110) com pelo menos um primeiro diafragma (106), um segundo diafragma (107, 108), um difusor definido entre um lado de revestimento de uma porção a jusante (106) do primeiro diafragma e um lado de concentrador de uma porção a montante (107) do segundo diafragma, e uma pluralidade de lâminas de difusor (110) no interior do difusor; cada lâmina de difusor (110) tem uma porção de ponta, uma porção de base e uma porção de aerofólio; as lâminas de difusor (110) estão localizadas entre a porção a jusante (106) do primeiro diafragma e a porção a montante (107) do segundo diafragma; a porção de base (110b) das lâminas de difusor (110) é integrada ou montada diretamente ou indiretamente na porção a montante (107) do segundo diafragma, e a porção de ponta (110t) das lâminas de difusor (110) fica em contiguidade contra a porção a jusante (106) do primeiro diafragma; alternativamente, a porção de base (130b) das lâminas de difusor (130) é integrada ou montada diretamente ou indiretamente na porção a jusante (106) do primeiro diafragma, e a porção de ponta (130t) das lâminas de difusor (130) fica em contiguidade contra a porção a montante (107) do segundo diafragma.

Centrifugal compressor with leakage-free diffuser blades and method of assembling a centrifugal compressor

A centrifugal compressor (100) comprises a rotor (103, 104, 105) with a plurality of impellers (104, 105) and a stator (101, 102, 106, 107, 108, 109, 110) with at least a first diaphragm (106), a second diaphragm (107, 108), a diffuser defined between a shroud side of a downstream portion (106) of the first diaphragm and a hub side of a upstream portion (107) of the second diaphragm, and a plurality of diffuser blades (110) inside the diffuser; each diffuser blade (110) has a tip portion, a base portion and an airfoil portion; the diffuser blades (110) are located between the downstream portion (106) of the first diaphragm and the upstream portion (107) of the second diaphragm; the base portion (HOB) of the diffuser blades (110) is integrated in or mounted directly or indirectly to the upstream portion (107) of the second diaphragm, and the tip portion (HOT) of the diffuser blades (110) abuts against the downstream portion (106) of the first diaphragm; alternatively, the base portion (130B) of the diffuser blades (130) is integrated in or mounted directly or indirectly to the downstream portion (106) of the first diaphragm, and the tip portion (130T) of the diffuser blades (130) abuts against the upstream portion (107) of the second diaphragm.