EP2029895A1 - Pompe polyphasique compacte - Google Patents
Pompe polyphasique compacteInfo
- Publication number
- EP2029895A1 EP2029895A1 EP07731306A EP07731306A EP2029895A1 EP 2029895 A1 EP2029895 A1 EP 2029895A1 EP 07731306 A EP07731306 A EP 07731306A EP 07731306 A EP07731306 A EP 07731306A EP 2029895 A1 EP2029895 A1 EP 2029895A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel
- blades
- channel
- channels
- machine according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D31/00—Pumping liquids and elastic fluids at the same time
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/181—Axial flow rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/181—Axial flow rotors
- F04D29/183—Semi axial flow rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
Definitions
- the present invention relates to the field of multiphase pumps for compressing a mixture of gas and possibly viscous liquid.
- the current rotodynamic multiphase pumps consist of the succession of several compression stages, typically from five to fifteen stages.
- Each stage is composed of a movable element, called a wheel or spinning wheel, and a fixed element called a rectifier.
- the inlet and the outlet of each element are axial, which, by the very nature of this geometry, gives these pumps a privileged operating range corresponding to low values of the pressure gain per stage in the range of relatively high flow rates. .
- This type of pump is therefore particularly well suited for high power compression stations.
- the pressure gain of such pumps can be increased by increasing the number of stages or by increasing the speed of rotation, which, depending on the type of application, can unfortunately lead to problems of size or reliability of the machines. on industrial sites.
- the present invention provides a multiphase rotodynamic pump which notably enables the compression of mixtures of gases and liquids in an operation area previously reserved for pumps of the double screw type or progressante cavity (Moineau pumps), while s 1 freeing problems inherent to positive displacement pumps.
- the device according to the invention is a pump which can be multi-stage whose movable wheels comprise a small number of blades and have a quasi-axial inlet and a semi-radial outlet.
- the present invention relates to a rotodynamic machine for compressing a multiphasic fluid comprising at least one gaseous phase and one liquid phase.
- the machine according to the invention comprises at least one wheel rotatable about an axis and mounted in a housing and at least one fixed wheel secured to the housing.
- Said movable wheel comprises a hub provided with at least two blades so as to form at least two channels delimited by the hub, the housing and two of said blades. And said channels having a centrifugal part.
- the rotodynamic machine according to the invention is characterized in that the length of one of the channels defined as the ratio between the volume of a channel and the maximum orthoradial area of said channel is between 10 cm and 20 cm, the area orthoradial being measured between the leading edge and the trailing edge of the blades of the moving wheel in a plane perpendicular to the axis of rotation, and in that the ratio between the area of the largest channel orthoradial section and the area of the smallest channel orthoradial section is less than or equal to 3, preferably less than or equal to 2.
- the moving wheel may have at least three channels, said channels having an orthoradial section of between 2 cm 2 minimum and 30 cm 2 maximum.
- the moving wheel may have n equidistant blades distributed in the peripheral direction on an angular sector between 2 ⁇ / n radians and 4 ⁇ / n radians.
- the angle ⁇ formed, in a tangential plane, by the projected tangent line to the mean direction of a channel of the moving wheel and the axis of rotation may be greater than 60 °, preferably 70 °.
- the internal radius of the casing measured at the trailing edge of the blades of said movable wheel may be greater than said radius measured at the leading edge of the blades of said moving wheel.
- the angle ⁇ formed in a meridian plane by the projected tangent line to the mean direction of a channel of the moving wheel and the axis of rotation may vary from a value between -20 ° to + 20 ° to leading edge of the blades of the moving wheel to a value between 0.1 ° and 70 ° at the trailing edge of the blades of the moving wheel.
- the thickness of the blades of the moving wheel, measured in a plane perpendicular to the axis of rotation may be minimum at a radius less than 0.9 times the largest radius of the moving wheel measured in said plane.
- the machine according to the invention may comprise a plurality of mobile wheels attached to the same rotation shaft.
- the fixed wheel may comprise a hub provided with at least two blades and the distance between the blades of the moving wheel and the blades of the fixed wheel, is limited to a maximum value of 6 millimeters.
- the channels of a fixed wheel delimited by the hub, the casing and the walls of the blades may have a centrifugal part and a centripetal part.
- Fixed wheels may have at least twice as many channels as moving wheels.
- the pump according to the invention achieves compression performance similar to that of axial multiphase pumps, but with a rotation speed reduced by about 30%.
- FIG. 1 represents, in axial section, a pump according to the invention
- FIG. 2 is a developed view of the trace resulting from the intersection of the blades of a moving wheel with a surface of revolution
- FIG. 3 represents, in axial section, a moving wheel
- the pump shown in axial section in FIG. 1 comprises at least one compression cell according to the invention.
- the pump members are mounted inside the casing 1 and around the rotating shaft 2 about the axis AA 1 .
- the fluid to be compressed is introduced into the pump via the inlet orifice 3.
- the circulation of the fluid introduced through the orifice 3 is adapted to the pump by a first wheel 5 which is fixed with respect to the casing 1,
- the total energy of the fluid is increased by means of the compression cell composed by the mobile wheel 6 and the fixed wheel or rectifier 7.
- the mobile wheel 6 is rotated by the shaft 2.
- the rectifier 7 is fixed by 1.
- the vanes or blades of the wheels 6 and 7 are shown diagrammatically in FIG. 2.
- the vanes 20 are fixed on the hub 8 in rotation with the wheel 6. There is a gap between the end of the vanes 20 of the wheel. wheel 6 and the casing 1, allowing this wheel to turn freely in the casing 1 still.
- the n blades 20 of a wheel 6 preferably extend over an angular portion equal to at least ⁇ radians.
- vanes of the wheel 6 overlap partially so as to form channels in which the pumped fluid is forced to flow during a fraction of the rotation during its passage through the moving wheel 6.
- the fixed wheel 7 is provided of vanes 21 integral with the hub 9 of the wheel 7 and the casing 1.
- a moving wheel 6 therefore has a number of channels equal to the number of its blades 20.
- These channels have a specific shape. More specifically, the inner radius of the channel, that is to say the outer radius of the hub 8 of the wheel 6, and the outer radius of the channel, that is to say the inner radius of the casing 1 at the level of the wheel 6, gradually increase from the inlet to the outlet of the wheel 6.
- the height of the fluid section that is to say the span of the blades 20, measured in the plane perpendicular to the axis the rotation of the pump, between the hub 8 and the casing 1 is low and gradually decreases, from the inlet to the outlet of the wheel.
- the passage section in a channel increases so as to overcome a too great deceleration of the fluid during its passage in the moving wheel 6.
- the section of a channel of a moving wheel 6 can be defined by the features presented hereinafter.
- the orthoradial section Sr of the channels is the area defined by the intersection between an interaubes channel of the wheel 6 with a plane perpendicular to the axis of rotation AA 'of the wheel.
- the orthogonal section Sf of the channels is the area defined by the intersection between a channel interaubes and a plane perpendicular to the mean direction of the channel at the point considered.
- the sections Sf are a good approximation of the normal sections offered to the fluid flowing in the channel between two successive blades of the wheel 6.
- Figure 2 shows the geometric layout of the blades 20 on the developed surface of a revolution envelope.
- the axis z represents the direction of the axis of rotation AA 1 and the axis R ⁇ represents the peripheral direction which is perpendicular to the axis AA 1 .
- FIG. 2 shows the planes containing the orthoradial Sr and orthogonal Sf sections of a channel.
- ⁇ is the angle formed in the meridian plane (plane defined by the radius and the axis of rotation A-A ') by the projected the straight line ⁇ tangent to the mean direction of the channel and the axis of rotation AA 'and, respectively, ⁇ is the angle formed in the tangential plane (plane defined by the peripheral direction and the axis of rotation A-
- ⁇ on the meridian plane or on the tangential plane is carried out in a direction perpendicular to the plane considered.
- FIG. 2 represents an angle ⁇ formed by the line ⁇ and the axis of rotation.
- FIG. 3 which shows a mobile wheel 6 viewed in an axial section, the angle ⁇ formed by the line ⁇ and the axis of rotation can be read.
- the angle ⁇ can be greater than 60 °, preferably 70 °, between the leading edge and the trailing edge of the wheel vane 6.
- the angle ⁇ can be limited in the regions close to the inlet and the outlet of the wheel 6.
- the leading edge of the vanes of the wheel 6 is placed in an area where ⁇ is included between -20 degrees and +20 degrees in order to obtain a substantially axial directional flow at the entrance of the wheel.
- ⁇ is included between -20 degrees and +20 degrees in order to obtain a substantially axial directional flow at the entrance of the wheel.
- ⁇ can be between 0.1 degrees and 70 degrees in order to avoid purely centrifugal flows at the exit of the moving wheels.
- the area of the sections Sr and Sf varies so as to offer the gas-liquid mixture flowing through the wheel 6, channels of suitable length and equivalent hydraulic diameter.
- the compression performance of the gas and liquid mixtures is optimized in a Sr and Sf variation range of between 2 cm 2 and 30 cm 2 , preferably between 2 cm 2 and 20 cm 2 , any point located between the inlet section and the outlet section of the wheel 6.
- Suitable characteristics for the Sr and Sf sections can be obtained by choosing judiciously, on the one hand, the number and thickness of the blades and, on the other hand, the shape of the fluid vein in the meridian plane.
- the thickness of the blades 20 is defined so as to confer orthogonal sections of oblong shape to the channels of the wheel 6.
- This geometry makes it possible to improve the mixing of a two-phase fluid in the channels of the moving wheel.
- Different geometries are shown in Figures 4 to 7 and listed in a nonlimiting manner and only by way of examples of possible embodiments of the blades of the movable wheel 6 of the multiphase pump according to the invention.
- Figures 4 to 7 show blade profiles located between the hub 8 and the casing 1, seen in a plane perpendicular to the axis of rotation AA 1 .
- the minimum thickness of the profiles is indicated by the reference E. In FIGS.
- FIG. 6 represents a blade profile with a thin foot without connection fillet from the blade to the hub 8.
- the minimum thickness E is located at the connection of the blade to the hub 8.
- these geometries can be defined by means of a law of thickness of the blade in the radial direction.
- This law of thickness in the radial direction makes it possible to define the surface of the blades in all points from a law of nominal thickness of the blade established for example, but in a nonlimiting manner, as a function of the geometrical coordinate ( z / L) to the end of the blades or the hub.
- the fluid circulates in channels delimited by the hub 9, the casing 1 and the blades 21.
- the machine according to the invention It is important to minimize the diffusion of the flows in the non-vanes between the moving wheels and the fixed wheels.
- inter-blade channels of the wheel 7 having original shapes.
- the fixed wheel has a triple curvature vane. More specifically, an inter-blade channel of the wheel 7 comprises a first centrifugal portion, followed by a second centripetal portion.
- the inner radius of the channel that is to say the outer radius of the hub of the wheel 7 and the outer radius of the channel, that is to say the inner radius of the casing 1 increase, then on the second part, the radius of the hub and the radius of the casing gradually decrease.
- the wingspan increases progressively from the entrance to the exit of the fixed wheel 7
- the section of a channel of the wheel 7 can be defined analogously to the moving wheel channels 6.
- the trailing edge of the vanes of the wheel 6 is located at a distance el from the leading edge of the vanes of the wheel 7.
- the trailing edge of the vanes of the wheel 7 is situated at a distance e2 from the edge of the wheel. attack of the blades of the next wheel.
- these distances el and e2, commonly called gaps are constant over the height of the blading.
- all the gaps can be in the range [0.1 mm; 6 mm].
- the pump according to the invention may comprise a plurality of compression cells arranged successively along the shaft 2.
- the pressurized fluid After passing through the different compression cells, the pressurized fluid is discharged from the pump via the discharge orifice 4.
- the multiphase pump according to the invention finds a favorable application in the compression of mixtures of gas and liquid whose viscosity can be significant. It is therefore an attractive solution for the compression of petroleum effluents, especially for heavy crudes.
- the semi-radial multiphase pump also called mixed, can be used on land, on isolated oil fields or in deep sea underwater version, and more generally on isolated sites requiring low maintenance.
- the pump according to the invention is also attractive for applications on offshore platforms.
- its use, with a relatively low rotational speed can allow the use of a fixed speed motor, significantly less expensive and more reliable than variable speed drive systems.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Fuel-Injection Apparatus (AREA)
- Valve Device For Special Equipments (AREA)
- Rotary Pumps (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0603377A FR2899944B1 (fr) | 2006-04-18 | 2006-04-18 | Pompe polyphasique compacte |
| PCT/FR2007/000641 WO2007119010A1 (fr) | 2006-04-18 | 2007-04-17 | Pompe polyphasique compacte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2029895A1 true EP2029895A1 (fr) | 2009-03-04 |
| EP2029895B1 EP2029895B1 (fr) | 2010-10-06 |
Family
ID=37499224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07731306A Active EP2029895B1 (fr) | 2006-04-18 | 2007-04-17 | Pompe polyphasique compacte |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8221067B2 (fr) |
| EP (1) | EP2029895B1 (fr) |
| AT (1) | ATE483915T1 (fr) |
| DE (1) | DE602007009677D1 (fr) |
| FR (1) | FR2899944B1 (fr) |
| NO (1) | NO339603B1 (fr) |
| WO (1) | WO2007119010A1 (fr) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1401868B1 (it) | 2010-08-31 | 2013-08-28 | Nuova Pignone S R L | Turbomacchina con stadio a flusso misto e metodo. |
| FR3010463B1 (fr) * | 2013-09-11 | 2015-08-21 | IFP Energies Nouvelles | Impulseur de pompe polyphasique avec des moyens d'amplification et de repartition d'ecoulements de jeu. |
| EP3312432B1 (fr) | 2016-10-19 | 2021-06-23 | IFP Energies nouvelles | Diffuseur pour dispositif de compression de fluide, comprenant au moins une aube avec ouverture |
| FR3137164B1 (fr) | 2022-06-24 | 2024-07-19 | Ifp Energies Now | Système et procédé de compression de dioxyde de carbone avec compression polyphasique et pompe supercritique |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1554591A (en) * | 1923-07-14 | 1925-09-22 | Oliver Immanuel Alvin | Deep-well turbine pump |
| JPS62206082A (ja) * | 1986-03-01 | 1987-09-10 | 株式会社 松井色素化学工業所 | 線状体の製造方法 |
| US5071317A (en) * | 1990-06-04 | 1991-12-10 | Alan Leach | Centrifugal pump having a unitary one-piece diffusion casing and a unitary one piece turbine impeller unit |
| US5562405A (en) * | 1994-03-10 | 1996-10-08 | Weir Pumps Limited | Multistage axial flow pumps and compressors |
| FR2748533B1 (fr) * | 1996-05-07 | 1999-07-23 | Inst Francais Du Petrole | Systeme de pompage polyphasique et centrifuge |
| US6595746B1 (en) * | 1998-04-24 | 2003-07-22 | Ebara Corporation | Mixed flow pump |
| FR2782755B1 (fr) * | 1998-09-02 | 2000-09-29 | Inst Francais Du Petrole | Turmomachine polyphasique a melange de phases ameliore et methode associee |
| US6547514B2 (en) * | 2001-06-08 | 2003-04-15 | Schlumberger Technology Corporation | Technique for producing a high gas-to-liquid ratio fluid |
| SE525219C2 (sv) * | 2003-05-15 | 2004-12-28 | Volvo Lastvagnar Ab | Turboladdarsystem för en förbränningsmotor där båda kompressorstegen är av radialtyp med kompressorhjul försedda med bakåtsvepta blad |
| US7241104B2 (en) * | 2004-02-23 | 2007-07-10 | Baker Hughes Incorporated | Two phase flow conditioner for pumping gassy well fluid |
| GB2417053B (en) * | 2004-08-11 | 2006-07-12 | Rolls Royce Plc | Turbine |
-
2006
- 2006-04-18 FR FR0603377A patent/FR2899944B1/fr not_active Expired - Fee Related
-
2007
- 2007-04-17 WO PCT/FR2007/000641 patent/WO2007119010A1/fr not_active Ceased
- 2007-04-17 DE DE602007009677T patent/DE602007009677D1/de active Active
- 2007-04-17 US US12/297,503 patent/US8221067B2/en active Active
- 2007-04-17 AT AT07731306T patent/ATE483915T1/de not_active IP Right Cessation
- 2007-04-17 EP EP07731306A patent/EP2029895B1/fr active Active
-
2008
- 2008-10-23 NO NO20084463A patent/NO339603B1/no unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007119010A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20090311094A1 (en) | 2009-12-17 |
| US8221067B2 (en) | 2012-07-17 |
| ATE483915T1 (de) | 2010-10-15 |
| WO2007119010A1 (fr) | 2007-10-25 |
| FR2899944B1 (fr) | 2012-07-27 |
| FR2899944A1 (fr) | 2007-10-19 |
| EP2029895B1 (fr) | 2010-10-06 |
| DE602007009677D1 (de) | 2010-11-18 |
| NO20084463L (no) | 2008-11-10 |
| NO339603B1 (no) | 2017-01-09 |
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