EP1178214A1 - Kreiselpumpe - Google Patents
Kreiselpumpe Download PDFInfo
- Publication number
- EP1178214A1 EP1178214A1 EP01116365A EP01116365A EP1178214A1 EP 1178214 A1 EP1178214 A1 EP 1178214A1 EP 01116365 A EP01116365 A EP 01116365A EP 01116365 A EP01116365 A EP 01116365A EP 1178214 A1 EP1178214 A1 EP 1178214A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- chamber
- chamber pot
- pump according
- pot
- 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
Images
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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
- F04D29/4266—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps made of sheet metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
Definitions
- the present invention relates to a centrifugal pump for conveying a fluid, consisting of a Housing with an inlet and an outlet with an impeller, which is in a chamber a drive shaft is rotatably supported, the chamber being formed from at least two parts, between which at least one sealing element is arranged, which seals the chamber interior.
- centrifugal pumps are generally used for lifting, emptying, filling, circulation or conveying of liquids.
- the impellers generally consist of a disc-shaped one Basic body, on one side of which walls are applied, which mostly form spiral channels.
- the liquid in the impeller channels is centrifugal displaced to the outside and experiences an increase in pressure and speed.
- negative pressure in the inner area leads to a uniform suction of the Conveying fluids through the suction opening.
- the undesirable speed increase in pumps is in general in a subordinate system with, for example, gradually widening channels or also converted into pressure energy in a vane-free annular space.
- At high pressure levels there are several stages of the same type, each consisting of an impeller and a bladeless annular space, connected in series, which are flowed through in sequence by the funding.
- the chamber pot has a substantially central bore through which the conveyed medium can leave the first chamber pot and get into the second chamber pot. Again there is an impeller arranged for a pressure difference between radially inside Areas and radially outer areas.
- the one emerging from the first chamber pot The medium is then conveyed in the same way by the second impeller due to the centrifugal force transported to the outside and then runs again on the bottom wall of the second chamber pot radially inwards and passes through the central opening of the second chamber pot.
- the one described The course continues for each subsequent stage of the centrifugal pump.
- Sealing elements e.g. B. in the form of O-rings, arranged between two adjacent chamber pots.
- the sealing elements perform a double function, namely a support and sealing function.
- the tin pots are placed on top of one another and pressed together for so long until the sealing ring takes on its sealing function.
- centrifugal pumps with closed impellers are already available as well as covered return stage blading. Although this measure can the efficiency can be brought into an acceptable range, the manufacture of closed Impellers and a covered return stage blading is very costly and time consuming.
- Another embodiment of a known centrifugal pump provides a support ring that between neighboring chamber pots is arranged and takes on an additional support function.
- the O-ring is "chambered". That is, the O-ring is from the support ring, the outer wall of the inner chamber pot and the inner wall of the outer chamber pot. This measure can reduce the influence of geometric tolerances of the sealing element, but cannot be completely prevented.
- pumps in the high-sterile area are not manufactured from rolled steel, but essentially Parts turned from solid, so that open wheels can be used. This way of making however, is very complex and, above all, expensive.
- the present invention is therefore based on the object of providing an inexpensive centrifugal pump To make available, which allows the use of open wheels and if necessary also in the Sterile area can be used.
- a chamber-forming part has a stop has, on which the other chamber-forming part is supported, the distance between the two chamber-forming Parts defined by the support connection.
- the sealing element no support function, but only a sealing function.
- the distance from chamber to chamber (package size) is only defined by the chamber-forming elements, but not by the sealing element.
- the distance between the impeller and Adjacent non-rotating chamber walls can be chosen to be very small without the risk of Collision of the impeller on the chamber walls occurs. Open impellers can therefore be used without reducing the efficiency.
- An embodiment is particularly preferred in which the stop lies outside of through the sealing element sealed volume is arranged.
- the pumped medium can therefore not come into contact with the support connection, so that this connection is not a problem for the high demands of sterile technology, as it is outside the Volume of the medium is.
- sealing element is arranged such that it comes into contact with the fluid during operation of the centrifugal pump.
- the sealing element preferably not chambered, as is the case, for example, in the embodiment described above was the case with an additional support ring.
- the pumped medium can then freely up to reach the O-ring, but it can also flow freely from the sealing ring, and the pump can be cleaned without residue.
- a particularly useful centrifugal pump is designed in several stages, with each stage having a chamber has, in each of which an impeller is arranged.
- the pump performance of the centrifugal pump can be significantly increased through the multi-level training.
- impellers are open. It will open under understood that the impeller channels have a substantially U-shaped cross section. Through the Open design of the impellers can have closed surfaces with a very low surface roughness can be achieved because welds can be ground and polished so that the high requirements of sterile technology can be met. The centrifugal pump can then be used as a sterile centrifugal pump be used.
- An advantageous embodiment of the present invention provides that the chambers from one Housing wall and a chamber pot, from a first chamber pot and the bottom of a second Chamber pot or from the bottom of a chamber pot, a support element and a housing wall be formed.
- the chamber of the first stage generally becomes the pump housing wall and a first chamber pot.
- the following stages have chambers each made up of a chamber pot and the bottom of the chamber pot of the previous stage become.
- the last stage can either consist of two chamber pots placed next to each other be or from the bottom of the chamber pot of the previous stage and a support element and the housing wall.
- This package design has the advantage that the individual chambers are essentially identical Parts can be made. Impellers and chamber pots are then simply alternated the drive shaft mounted inside the pump housing.
- An embodiment is particularly expedient in which the chamber pots are made of deep-drawn sheet metal are made.
- the chamber pot preferably has a substantially circular cross section and one Pot bottom, the pot bottom having an essentially central bore.
- the central hole serves to direct the medium into the next chamber pot or the next stage.
- the return blading is used, among other things, to swirl the impeller outwards and provide it with a swirl Collect the medium and direct it towards the central opening. In doing so, the Spiral return blading converts the swirl of the pumped medium into kinetic energy.
- An embodiment in which the chamber pot is curved inwards is particularly preferred Floor. This is of great advantage in terms of flow technology. Especially in sterile technology it is very advantageous if the centrifugal pump is designed such that it is at least in an assembly orientation is self-draining.
- the curvature of the chamber pot is helpful here. This is because the pump according to the invention becomes such oriented that the chamber pots are arranged with the bottom upwards, then flows to the Switch off the centrifugal pump at the inclined medium that is still in the pump housing Surfaces of the chamber pot inwards and can get into the previous pump stage. Then it flows on the preferably also inclined side of the impeller, which has no blading has, again axially outwards, until it hits the outer surface of the chamber pot underneath hits and is guided radially inwards again until it reaches the previous pump stage.
- the chamber pot wall is preferably designed such that it has a stop on its outside having. On the inside, however, it preferably has a circumferential groove. This groove serves the sealing element, for. B. an O-ring.
- the chamber pot wall is particularly preferably designed such that it increases with increasing axial distance from the bottom wall preferably expanded in steps. This happens in the way that the upper edge of the chamber pot wall has an inner diameter which is approximately the outer diameter of the lower section corresponds to the chamber pot wall of the previous section. Therefore, the chamber pot with its outwardly widening section over the chamber pot bottom another chamber pot.
- the extended section is dimensioned that he hits the stop of the chamber pot underneath.
- the centrifugal pump exists of a housing 9, an intake manifold 1 and an outlet opening 2. Inside the housing 9 are three impellers 3, 3 ', 3 "mounted on a shaft 13. Between the impellers 3, 3', 3" are chamber pots 4, 4 'arranged.
- the chamber pots 4, 4 ' are made of deep-drawn sheet metal with a thickness of made about 4 mm.
- the impellers 3, 3 ', 3 “have a spiral wall 6 on one side that form the impeller channels.
- the chamber pots 4, 4 ' have on the inside of the pot bottom also a spiral wall 7, which serves as return blading.
- the rotation of the first impeller 3 results in the area of the first impeller 3 shows a pressure difference between radially inner regions and radially outer regions. This leads to the fact that the medium is pumped through the intake 1 centrally into the centrifugal pump is sucked in. Due to the rotation of the first impeller 3, the medium is pumped due to the centrifugal force transported radially outwards.
- the fluid that is set in motion leaves in a radial direction Outward direction of the first impeller 3 and reaches the annular region 14, in which none Blades are arranged. In this area, the kinetic energy of the pumped medium is converted into a Pressure difference converted.
- the pumped medium now moves axially in the direction of the arrow in FIG. 1 and thus reaches the area of the bottom of the chamber pot 4. Since the medium is pumped through the Rotation of the impeller 3 is provided with a twist, it is due to the spiral return blading 7 added.
- the return blading uses the swirl of the pumped medium to guide the pumped medium radially inwards along the inner wall of the chamber pot 4.
- the Chamber pot 4 has a central bore 12 through which the medium to the second impeller 3 'can reach.
- the impeller 3 'already belongs to the second stage of the centrifugal pump. The functional one The process is repeated for each individual level. After the fluid has passed all stages has passed, it is discharged through the outlet opening 2 from the pump.
- the chamber pots 4, 4 have an extraordinary Form that is made clear in connection with FIGS. 2a and 2b below.
- the chamber pot 4 has been made from a deep-drawn sheet metal.
- the Chamber pot consists of a bottom and a cylindrical wall.
- the cylindrical wall of the chamber pot 4 has a step-like extension.
- the stop 10 is thereby formed.
- the inner wall of the chamber pot 4 is also expanded yourself.
- a circumferential groove 11 is made in the wall, that of the receptacle of the O-ring 5 is used. This special shape of the cylindrical wall ensures the composite State for a defined distance between adjacent chamber pots 4, 4 '.
- the sealing and support function according to the invention will now be illustrated with reference to FIG. 1.
- the first chamber pot 4 has a chamber wall that widens.
- an O-ring 5 is used in the Groove 11 of the chamber wall of the first chamber pot 4 in the Groove 11 of the chamber wall of the first chamber pot 4 .
- the upper extended Edge of the side wall of the chamber pot is supported on the housing 9.
- the O-ring 5 is already compressed between the housing wall 9 and the chamber pot 4, so that it performs its sealing function. Nevertheless, the distance between chamber bottom 4 and Housing 9 is not determined by the O-ring 5, but only by the axial length of the side wall sections of the chamber pot 4.
- the side wall of the second chamber pot 4 On the outer wall of the chamber pot 4 is due to the expansion the side wall a protrusion 10 arose, which serves as a stop for the upper end of the next Chamber pot 4 'is used. Its side wall also has an extension, so that the side wall of the second chamber pot 4 'has an inner diameter in the upper region which is approximately that Corresponds to the outer diameter of the lower region of the side wall of the first chamber pot. Therefore can the side wall of the second chamber pot 4 'sleeve-like over the side wall of the first Chamber pot 4 are pushed until the outer edge 15 of the side wall of the second chamber pot 4 'on the stop 10 of the side wall of the first chamber pot 4.
- the chamber pot 4 ' is dimensioned so that in this state the O-ring 5 between the first and second chamber pot 4 or 4 'is already loaded so that it performs its sealing function. Again, it is essential that the distance between the two chamber pots 4 and 4 'is not of geometric tolerances of the sealing element 5 depends, but clearly by the metallic contact of the outer End of the side wall of a chamber pot at the stop 10 is determined.
- the one shown here Embodiment the last stage has no chamber pot. Instead, there is a support element 8 provided that, however, at least on its inside expands in a similar way to the chamber pots 4, 4 'do. As a result, the sealing and supporting function of various parts also becomes effective in the third stage accepted. While the support function from the defined metallic contact between the Support element 8 and the stop 10 of the second chamber pot 4 'is given, the sealing function met by the compressed O-ring 5.
- 4 ' is the spiral return blading 7 appropriate.
- the number of return blades should be be equal to the number of blades on the impeller. Since the spiral blades 7 are welded without gaps However, every bucket is associated with a corresponding effort and expense. Extensive tests have surprisingly shown that, even with a large number of Paddles in the impeller, only four return blades lead to a very good result.
- the following method is preferably used in the production of the chamber pot 4, 4 '.
- a sheet blank with the final shape is drawn from 4 mm thick stainless steel sheet.
- the return blades preferably four, are welded into the pre-drawn blank and in the seam area by grinding and polishing to the desired surface quality brought.
- the round blank prepared in this way, together with the welded-on blades, is placed in a second deep-drawing processing step drawn into the final contour.
- all surfaces can be arranged freely accessible and are therefore gap-free and with a surface roughness of less than or equal to 0.8 to 0.4 ⁇ m produced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Reciprocating Pumps (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
- Fig. 1
- eine Schnittansicht durch eine erfindungsgemäße dreistufige Kreiselpumpe und
- Fig. 2a und Fig. 2b
- eine Schnittansicht und eine Draufsicht des Blechtopfes von Fig. 1.
Claims (17)
- Kreiselpumpe zum Befördern eines Fluids bestehend aus einem Gehäuse (9) mit einer Eingangs- und einer Ausgangsöffnung (1, 2) mit einem Laufrad (3, 3', 3"), das in einer Kammer auf einer Antriebswelle (13) drehbar gelagert ist, wobei die Kammer aus mindestens zwei Teilen gebildet wird, zwischen denen ein Dichtelement (5) angeordnet ist, das den Kammerinnenraum abdichtet, dadurch gekennzeichnet, daß ein kammerbildendes Teil einen Anschlag (10) aufweist, an dem sich das andere kammerbildende Teil abstützt, so daß der Abstand der beiden kammerbildenden Teile durch die Abstützverbindung definiert ist.
- Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß der Anschlag (10) außerhalb des durch das Dichtelement (5) abgedichteten Volumens angeordnet ist.
- Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Dichtelement (5) so angeordnet ist, daß es während des Betriebes der Kreiselpumpe mit dem Fluid in Kontakt tritt.
- Kreiselpumpe nach Anspruch 3, dadurch gekennzeichnet, daß das Dichtelement (5) offen liegt, d. h. nicht gekammert ist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Kreiselpumpe mehrstufig ist, wobei jede Stufe eine Kammer aufweist, in der jeweils ein Laufrad (3, 3', 3") angeordnet ist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Laufrad (3, 3', 3") ein offenes Laufrad (3, 3', 3") ist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Kreiselpumpe eine Sterilkreiselpumpe ist.
- Kreiselpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Kammern aus einer Gehäusewand (9) und einem Kammertopf (4, 4'), aus einem ersten Kammertopf (4') und dem Boden eines zweiten Kammertopfes (4) oder aus dem Boden eines Kammertopfes (4'), einem Stützelement (8) sowie einer Gehäusewand (9) gebildet werden.
- Kreiselpumpe nach Anspruch 8, dadurch gekennzeichnet, daß zumindest ein Kammertopf (4, 4') aus tiefgezogenem Blech hergestellt ist.
- Kreiselpumpe nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß der Kammertopf (4, 4') einen im wesentlichen kreisförmigen Querschnitt und einen Topfboden aufweist, wobei der Topfboden eine im wesentlichen zentrale Bohrung (12) hat.
- Kreiselpumpe nach Anspruch 10, dadurch gekennzeichnet, daß an der Innenseite des Kammertopfbodens eine vorzugsweise offene Rückführbeschaufelung (7) angeordnet ist.
- Kreiselpumpe nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, daß der Kammertopf (4, 4') einen nach innen gewölbten Boden aufweist.
- Kreiselpumpe nach Anspruch 12, dadurch gekennzeichnet, daß die Kreiselpumpe selbstentleerend ist.
- Kreiselpumpe nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, daß die die Seitenwand des Kammertopfes an ihrer Außenseite den Anschlag (10) aufweist.
- Kreiselpumpe nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß die Kammertopfwand an ihrer Innenseite eine umlaufende Nut (11) aufweist.
- Kreiselpumpe nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, daß sich die im wesentlichen zylindrische Seitenwand des Kammertopfes ausgehend vom Kammertopfboden und etwa auf halber axialer Höhe stufenartig erweitert.
- Kreiselpumpe einem der Ansprüche 8 bis 16, dadurch gekennzeichnet, daß die radiale Erweiterung etwa der Wandstärke der Kammertopfwand entspricht, so daß der erweiterte Abschnitt hülsenartig auf den nicht erweiterten Abschnitt eines benachbarten Kammertopfes aufschiebbar ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK01116365T DK1178214T3 (da) | 2000-07-08 | 2001-07-06 | Centrifugalpumpe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10033402A DE10033402A1 (de) | 2000-07-08 | 2000-07-08 | Kreiselpumpe |
DE10033402 | 2000-07-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1178214A1 true EP1178214A1 (de) | 2002-02-06 |
EP1178214B1 EP1178214B1 (de) | 2005-05-11 |
Family
ID=7648361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01116365A Expired - Lifetime EP1178214B1 (de) | 2000-07-08 | 2001-07-06 | Kreiselpumpe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1178214B1 (de) |
AT (1) | ATE295481T1 (de) |
DE (2) | DE10033402A1 (de) |
DK (1) | DK1178214T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105952683A (zh) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | 卧式水泵的泵头结构 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10200579B4 (de) * | 2002-01-09 | 2013-06-06 | Hilge Gmbh & Co. Kg | Selbstansaugende Kreiselpumpe |
EP2677175A1 (de) | 2012-06-19 | 2013-12-25 | Lothar Reckert | Mehrstufiges Radialgebläse |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0492575A1 (de) * | 1990-12-25 | 1992-07-01 | Ebara Corporation | Zwischenstufengehäuse für eine Pumpe aus Metallblech und Verfahren zu dessen Herstellung |
US5201633A (en) * | 1990-04-24 | 1993-04-13 | Pompes Salmson | Vertical centrifugal hydraulic pump assembly |
EP0916850A1 (de) * | 1997-11-13 | 1999-05-19 | Sulzer Pumpen AG | Gehäuse für Aggregate mit einem Fluid von hohem Druck |
EP0936356A1 (de) * | 1998-02-13 | 1999-08-18 | CALPEDA S.p.A. | Selbstansaugende Strahlpumpe mit Durchflusskontrollvorrichtung |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT369515B (de) * | 1979-06-12 | 1983-01-10 | Garvenswerke Pumpen Motoren Un | Pumpe und verfahren zum einbau eines dichtringes in eine pumpe |
DE4400289C2 (de) * | 1994-01-07 | 2001-07-05 | Ksb Ag | Kreiselpumpe |
-
2000
- 2000-07-08 DE DE10033402A patent/DE10033402A1/de not_active Withdrawn
-
2001
- 2001-07-06 DK DK01116365T patent/DK1178214T3/da active
- 2001-07-06 DE DE50106176T patent/DE50106176D1/de not_active Expired - Lifetime
- 2001-07-06 AT AT01116365T patent/ATE295481T1/de not_active IP Right Cessation
- 2001-07-06 EP EP01116365A patent/EP1178214B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5201633A (en) * | 1990-04-24 | 1993-04-13 | Pompes Salmson | Vertical centrifugal hydraulic pump assembly |
EP0492575A1 (de) * | 1990-12-25 | 1992-07-01 | Ebara Corporation | Zwischenstufengehäuse für eine Pumpe aus Metallblech und Verfahren zu dessen Herstellung |
EP0916850A1 (de) * | 1997-11-13 | 1999-05-19 | Sulzer Pumpen AG | Gehäuse für Aggregate mit einem Fluid von hohem Druck |
EP0936356A1 (de) * | 1998-02-13 | 1999-08-18 | CALPEDA S.p.A. | Selbstansaugende Strahlpumpe mit Durchflusskontrollvorrichtung |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105952683A (zh) * | 2016-05-31 | 2016-09-21 | 浙江南元泵业有限公司 | 卧式水泵的泵头结构 |
Also Published As
Publication number | Publication date |
---|---|
ATE295481T1 (de) | 2005-05-15 |
DK1178214T3 (da) | 2005-08-01 |
DE10033402A1 (de) | 2002-01-24 |
EP1178214B1 (de) | 2005-05-11 |
DE50106176D1 (de) | 2005-06-16 |
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