WO2009024476A1 - Multiphasenpumpe - Google Patents
Multiphasenpumpe Download PDFInfo
- Publication number
- WO2009024476A1 WO2009024476A1 PCT/EP2008/060409 EP2008060409W WO2009024476A1 WO 2009024476 A1 WO2009024476 A1 WO 2009024476A1 EP 2008060409 W EP2008060409 W EP 2008060409W WO 2009024476 A1 WO2009024476 A1 WO 2009024476A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- hollow shaft
- shaft extension
- hollow
- pump according
- Prior art date
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
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
-
- 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
Definitions
- the invention relates to a multiphase pump according to the preamble of claim 1 for the promotion of mixtures containing multiple phases.
- the blade has a profile formed by intersecting it with the surface of a cylinder coaxial with the impeller, the angle of inclination of the profile to the axial direction decreasing continuously from the leading edge of the blade to the trailing edge.
- the profile has essentially no curvature in the immediate vicinity of the leading edge, with the slope of a curve of the blade profile curvature continuously increasing as a function of the axial distance from the leading edge as the distance from the leading edge increases.
- the impellers of multiphase pumps typically have a relatively large inner diameter (see, for example, FIGS. 2A and 2B of GB-A-1 561 454).
- hollow shafts are therefore usually required, since the lower mass of the hollow shafts increases the natural frequency and the limit to instability. Because of the large inner diameter of the wheels, the hollow shaft is normally provided with shaft extensions which have a smaller diameter so that the bearings and the seals which seal the shaft extensions with respect to the pump housing can be made smaller.
- the shaft approaches with the
- Hollow shaft are connected.
- the shaft projections which were previously designed as a shaft journal, shrunk into the hollow shaft with simultaneous axial abutment of the shaft journal in the hollow shaft.
- the shrink joint there were always problems with the stability of the compound. These are on the one hand in the material to be used for the shaft (austenitic steel or duplex steel) justified, in which under the constant load of the shrink joint creep of the material and thus a loosening of the connection can not be excluded.
- the problems are caused by manufacturing difficulties. Tolerances and uneven cooling over the circumference can lead to a non-uniform shrink connection with reduced load capacity.
- Another disadvantage of the shrink connection is the insufficient sealing of the hollow shaft relative to the mixture to be conveyed. Due to the penetration of liquid into the hollow shaft, the advantage of the lower mass can be at least partially nullified.
- the object of the invention is to provide a multi-phase pump with a hollow shaft, which is provided with shaft extensions, which are stably connected to the hollow shaft, and which can be easily sealed against the hollow shaft.
- the multiphase pump according to the invention for conveying mixtures which contain a plurality of phases comprises at least one impeller, a hollow shaft on which the impeller is arranged and at least one shaft extension which in each case has a shaft extension with a shaft diameter smaller in diameter than the hollow shaft and a connection part connect at least one shaft extension piece with the hollow shaft.
- a flange is formed on the connecting part of the shaft extension piece, which is connected to a front side and / or surface of the hollow shaft. The flange formed on the connecting part can be connected to one of the end faces and / or surfaces of the hollow shaft, for example by means of a plurality of screws and / or threaded bolts.
- the multi-phase pump comprises on one side of the hollow shaft a shaft extension with a shaft extension and a connecting part, on which a flange is formed, which is connected to an end face and / or surface of the hollow shaft, and on the other side of the hollow shaft a directly on the same formed shaft approach with a relation to the hollow shaft smaller shaft diameter.
- the multi-phase pump comprises two shaft extension pieces, each having a connecting part, on which a flange is formed, which is connected to one end face and / or surface of the hollow shaft.
- the shaft extension piece or pieces each comprise one or more centering elements in order to center the shaft extension piece or pieces relative to the hollow shaft.
- the centering element (s) may, for example, project into the hollow shaft, whereby the shaft extension piece (s) may occasionally be centered on an inner side or surface of the hollow shaft.
- the multiphase pump may include one or more bearings on a case-by-case basis, such as one or more radial bearings and / or thrust bearings for rotatably supporting the shaft (s), and / or a pump housing and one or more seals, for example, one or more mechanical seals. to seal the shaft or shoulders with respect to the pump housing.
- the multiphase pump according to the invention has the advantage that a secure connection between shaft extension piece and hollow shaft is ensured by flanging the shaft extension piece on an end face and / or surface of the hollow shaft.
- the flanging of the shaft lug also allows a simple seal between the shaft shoulder and the hollow shaft, for example by means of an O-ring seal.
- Fig. 1 shows an embodiment of a multi-phase pump according to the present invention
- Fig. 2 is a detail view of the shaft connection of the
- the multi-phase pump 1 for conveying mixtures containing multiple phases, with at least one impeller 5.1, 5.2, a hollow shaft 2, on which the impeller is arranged and at least one shaft extension piece 10 is equipped.
- the shaft extension 10 includes a shaft extension 12, 12.2 with a relative to the hollow shaft smaller shaft diameter and a connecting part 11 to connect the at least one shaft extension piece with the hollow shaft.
- a respective flange 11 a is formed on the connecting part 11 of the shaft extension piece 12, 12.2, which is connected to a front side and / or surface 2 a of the hollow shaft 2.
- the end face may, for example, as shown in Figures 1 and 2, the entire end face include or only a part thereof.
- the impeller or impellers 5.1, 5.2 each comprise one or more blades, which may have an entry angle between, for example, 2 ° and 50 °, in particular between 4 ° and 25 °, and an exit angle which, for example, may be between the entry angle and 60 °, in particular between the entry angle and 25 °.
- the outer diameter of the flange 11 a can, as shown in Figures 1 and 2, are substantially the same size as the outer diameter of the hollow shaft 2 is selected. However, it is occasionally also possible to choose the outer diameter of the flange larger or smaller than the outer diameter of the hollow shaft 2. If necessary, a pressure element, such as a pressure plate, can be provided, with which the flange can be pressed against an end face of the hollow shaft. This is particularly advantageous if the outer diameter of the flange is smaller than the outer diameter of the hollow shaft. Independently of this, a larger outer diameter and / or a flange than the remaining hollow shaft can be provided on the hollow shaft at least on one side. This is especially beneficial if the
- Hollow shaft is made comparatively thin-walled and the strength of the connection between the flange 11 a of the connecting part 11 and one of the end faces and / or surfaces 2a of the hollow shaft is critical.
- the formed on the connecting part 11 flange 11 a for example, by means of several screws and / or threaded bolts 13.1, 13.2 be connected to one of the end faces and / or surfaces 2a of the hollow shaft. If a pressure element, such as a pressure plate, is present, with which the flange 11 a of the connecting part is pressed against an end face and / or surface of the hollow shaft, the pressure element be connected by means of screws and / or threaded bolts 13.1, 13.2 with one of the end faces and / or surfaces 2a of the hollow shaft.
- a pressure element such as a pressure plate
- the multi-phase pump comprises two shaft extension pieces 10, each having a connecting part 11, on which a flange 11a is formed, which is connected to one end face and / or surface 2a of the hollow shaft 2.
- a shaft extension piece 10 with a shaft extension 12.2 on only one side of the hollow shaft 2 and to provide a shaft extension 12.1 formed directly on the hollow shaft with a shaft diameter smaller than the hollow shaft on the other side ,
- the shaft extension piece 10 each comprise one or more centering elements 11 b in order to center the shaft extension piece with respect to the hollow shaft 2.
- the centering or the elements may protrude, for example, in the hollow shaft, wherein the
- Wellenansatz choir can occasionally be centered on an inner side or surface 2b of the hollow shaft 2.
- a fine machining can be provided for the inside or surface 2b of the hollow shaft, for example, by the inside or surface is additionally turned off to ensure proper centering of the shaft extension piece.
- a centering for example, as shown in Figures 1 and 2, a short centering bolt may be provided, which is fitted into the hollow shaft.
- a seal 14 is provided in each case between the shaft extension piece or pieces 10 and the hollow shaft 2 in order to seal the shaft extension piece or pieces relative to the hollow shaft.
- the seal may, for example, as shown in Fig. 2, be provided between the centering part 11 b and the inside or surface 2b of the hollow shaft 2 or additionally or alternatively between the flange 11 a of the connecting part 11 and one of the end faces and / or - surfaces 2a of the hollow shaft. If the seal between the centering part 11 b and the inside or surface 2b of the hollow shaft is provided, then a fine machining of the inside or surface, as already described in connection with the centering of the shaft extension piece was advantageous to improve the seal.
- seals comparatively favorable elastomeric seals, such as O-ring seals, are used, since the temperature at the sealing point both in the production and in operation of the multiphase pump are limited and are usually below 100 0 C.
- the multiphase pump 1 may comprise one or more guide elements 4.1, 4.2 on a case-by-case basis.
- a guide element 4.1, 4.2 is provided in each case after an impeller 5.1, 5.2, which forms a pump and / or compression stage together with the preceding impeller.
- the multi-phase pump may include one or more stages, for example four stages as shown in FIG. In the longitudinal section shown in Fig. 1 wheels and vanes are shown in each case only in the upper part of the multiphase pump shown, while in the lower part of the corresponding axially symmetrical images of the wheels and vanes have been omitted.
- the multi-phase pump comprises case by case one or more bearings, for example one or more radial bearings 9.1, 9.2 and / or thrust bearings 9.3 to rotatably support the shaft extension or lugs 12.1, 12.2, and / or a pump housing 3 and one or more Seals, which are not shown in Fig. 1, for example, one or more mechanical seals, throttle gaps with labyrinths, throttle gaps with radial sealing rings, with quench seals, floating ring seals, brush seals or packages to seal the one or more Wellenan arrangementsi 2.1, 12.2 relative to the pump housing 3.
- the pump housing 3 is typically provided with an inlet 7 and an outlet 8.
- the described multiphase pump for conveying mixtures containing multiple phases thanks to the hollow shaft allows stable operation even with a large inner diameter of the wheels and allows thanks to the shaft extensions or the use of bearings and seals with respect to the hollow shaft reduced diameter, which is beneficial to both the manufacturing as well as the maintenance cost low.
- the flanging of the respective shaft extension piece on an end face of the Hollow shaft also allows a secure connection and a simple seal between shaft extension piece and hollow shaft.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08787005A EP2191143A1 (de) | 2007-08-17 | 2008-08-07 | Multiphasenpumpe |
BRPI0814744-2A BRPI0814744A2 (pt) | 2007-08-17 | 2008-08-07 | bomba de fases múltiplas |
US12/673,149 US20110182756A1 (en) | 2007-08-17 | 2008-08-07 | Multi-Phase Pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07114550 | 2007-08-17 | ||
EP07114550.2 | 2007-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009024476A1 true WO2009024476A1 (de) | 2009-02-26 |
Family
ID=38852784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/060409 WO2009024476A1 (de) | 2007-08-17 | 2008-08-07 | Multiphasenpumpe |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110182756A1 (de) |
EP (1) | EP2191143A1 (de) |
BR (1) | BRPI0814744A2 (de) |
WO (1) | WO2009024476A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010044464A1 (de) * | 2010-09-06 | 2012-03-08 | Hackforth Gmbh | Welle zum Übertragen von Drehmomenten |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2918763A1 (de) * | 1979-05-09 | 1981-01-22 | Kraftwerk Union Ag | Lageranordnung fuer laeufer elektrischer maschinen, insbesondere fuer einen laeufer eines turbogenerators mit supraleitender feldwicklung |
FR2684149A1 (fr) * | 1991-11-27 | 1993-05-28 | Jeumont Schneider | Palier, notamment pour pompe ou turbine. |
US5253977A (en) * | 1990-12-14 | 1993-10-19 | Technicatome Societe Technique Pour L'energie Atomique | Multistage pump for two-phase effluents |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH250727A (de) * | 1945-12-10 | 1947-09-15 | Sulzer Ag | Trommelläufer für Turbomaschinen. |
DE3019864C2 (de) * | 1980-05-23 | 1982-05-27 | Kraftwerk Union AG, 4330 Mülheim | Generatorläufer, insbesondere Turbogeneratorläufer, mit supraleitender Erregerwicklung |
US5199325A (en) * | 1991-09-12 | 1993-04-06 | Dana Corporation | Electronic shift or clutch actuator for a vehicle transmission |
US6083108A (en) * | 1998-05-07 | 2000-07-04 | General Electric Co. | Collapsible and relatively rotatable drive shaft |
DE50206223D1 (de) * | 2001-10-22 | 2006-05-18 | Sulzer Pumpen Ag | Wellenabdichtungsanordnung für eine Pumpe zur Förderung heisser Fluide |
-
2008
- 2008-08-07 EP EP08787005A patent/EP2191143A1/de not_active Ceased
- 2008-08-07 WO PCT/EP2008/060409 patent/WO2009024476A1/de active Application Filing
- 2008-08-07 BR BRPI0814744-2A patent/BRPI0814744A2/pt not_active IP Right Cessation
- 2008-08-07 US US12/673,149 patent/US20110182756A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2918763A1 (de) * | 1979-05-09 | 1981-01-22 | Kraftwerk Union Ag | Lageranordnung fuer laeufer elektrischer maschinen, insbesondere fuer einen laeufer eines turbogenerators mit supraleitender feldwicklung |
US5253977A (en) * | 1990-12-14 | 1993-10-19 | Technicatome Societe Technique Pour L'energie Atomique | Multistage pump for two-phase effluents |
FR2684149A1 (fr) * | 1991-11-27 | 1993-05-28 | Jeumont Schneider | Palier, notamment pour pompe ou turbine. |
Non-Patent Citations (1)
Title |
---|
See also references of EP2191143A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010044464A1 (de) * | 2010-09-06 | 2012-03-08 | Hackforth Gmbh | Welle zum Übertragen von Drehmomenten |
Also Published As
Publication number | Publication date |
---|---|
US20110182756A1 (en) | 2011-07-28 |
BRPI0814744A2 (pt) | 2011-07-12 |
EP2191143A1 (de) | 2010-06-02 |
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