EP1178214B1 - Kreiselpumpe - Google Patents

Kreiselpumpe Download PDF

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Publication number
EP1178214B1
EP1178214B1 EP01116365A EP01116365A EP1178214B1 EP 1178214 B1 EP1178214 B1 EP 1178214B1 EP 01116365 A EP01116365 A EP 01116365A EP 01116365 A EP01116365 A EP 01116365A EP 1178214 B1 EP1178214 B1 EP 1178214B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
pot
chamber
pump according
impeller
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.)
Expired - Lifetime
Application number
EP01116365A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1178214A1 (de
Inventor
Heinz Rust
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilge GmbH and Co KG
Original Assignee
Philipp Hilge & Co KG GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Philipp Hilge & Co KG GmbH filed Critical Philipp Hilge & Co KG GmbH
Priority to DK01116365T priority Critical patent/DK1178214T3/da
Publication of EP1178214A1 publication Critical patent/EP1178214A1/de
Application granted granted Critical
Publication of EP1178214B1 publication Critical patent/EP1178214B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 intake and an outlet opening with an impeller in a chamber a drive shaft is rotatably mounted, wherein the chamber is 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 promotion of liquids.
  • the wheels are generally made of a disk-shaped Main body, on one side of which walls are applied, which usually form spiral-shaped channels.
  • centrifugal pumps the necessary pressure difference under the influence of a continuous flow process reached.
  • the liquid located in the impeller channels by the Zentrifugafkraft displaced to the outside and experiences a pressure and speed increase.
  • resulting negative pressure in the inner area leads to a uniform suction of Delivery fluid through the suction port.
  • the undesirable in pumps speed increase is in general in a downstream system with, for example, gradually expanding channels or converted into pressure energy in a paddle-free annulus.
  • At high pressure levels be several similar stages, each consisting of impeller and shovelless annulus, connected in series, which are flowed through in sequence by the conveyor.
  • the rotating first impeller is the medium now transported radially outwards. All wheels are essentially of a shovelless surrounded annular gap in which forms a higher pressure. This causes the Fluid on the back of the impeller on the bottom wall of the chamber pot radially to is guided inside.
  • the chamber pot has a substantially central bore through which the subsidized medium can leave the first chamber pot and enters the second chamber pot. Also there is again an impeller arranged for a pressure difference between the radially inner Areas and radially outward areas provides.
  • the emanating from the first chamber pot Transfer medium is then 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 inward and passes through the central opening of the second chamber pot.
  • the described Course continues for each subsequent stage of the centrifugal pump.
  • the O-ring is "chambered". That is, the O-ring is made of the support ring, the outer wall the inner chamber pot and the inner wall of the outer chamber pot encased.
  • US 5,201,633 describes a cast construction of a centrifugal pump which is completely sealless is executed between the step components. A seal is done only by means of O-rings on Outer sheath.
  • EP 0 492 575 A1 discloses an interstage housing for a metal sheet Pump shown. Two elements are there sealed against each other via an O-ring, where the O-ring is arranged in a corresponding chamber. Because of the chamber arrangement it is it is not possible for the fluid to contact the o-ring during operation of the centrifugal pump.
  • the present invention is therefore based on the object, a cost-effective centrifugal pump for To make available, which allows the use of open wheels and possibly also in the Sterile area can be used.
  • this object is achieved by a centrifugal pump with the features of claim 1 solved.
  • the sealing element no support function, but only sealing function.
  • the distance from chamber to chamber (package size) only defined by the chamber-forming elements, but not by the sealing element.
  • the chamber-forming Elements can be made very accurately, the distance between impeller and adjacent non-rotating chamber walls are very small, without the risk of Collision of the impeller on the chamber walls arises. It can therefore be used open wheels be, without it comes to a reduction of the efficiency.
  • the sealing element is arranged so that it during operation of the centrifugal pump with the fluid in Contact kicks.
  • the sealing element is not chambered, as for example in the case described above Embodiment with an additional support ring was the case.
  • the pumped medium then unhindered to reach the O-ring, but it can also be unhindered again drain from the sealing ring, and a cleaning of the pump can be done without residue.
  • the fluid can not come into contact with the support connection, so that this connection represents no problem for the high requirements of the sterile technology, since it is outside of the Delivery medium volume is.
  • a particularly useful centrifugal pump is designed in multiple stages, each stage a chamber has, in each of which an impeller is arranged.
  • the pumping power of the centrifugal pump can be increased significantly by the multi-level training.
  • At least a part of the wheels is open. It is under open understood that the impeller channels have a substantially U-shaped cross-section.
  • the centrifugal pump can then be used as a sterile centrifugal pump be used.
  • An expedient embodiment of the present invention provides that the chambers of a Housing wall and a chamber pot, from a first chamber pot and the bottom of a second Kammertopfes or from the bottom of a chamber pot, a support element and a housing wall be formed.
  • the chamber of the first stage is generally the pump housing wall and a first chamber pot formed.
  • the following stages have chambers, each formed from a chamber pot and the bottom of the chamber pot of the previous stage become.
  • the last stage can either also be formed from two stacked chamber pots 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 of substantially identical Parts can be produced. Impellers and chamber pots are then simply alternately on the drive shaft mounted within the pump housing.
  • the chamber pot preferably has a substantially circular cross-section and a Pot bottom, wherein the bottom of the pot has a substantially central bore.
  • the central hole serves to guide the fluid to the next chamber pot or to the next stage.
  • the return blading serves, among other things, to the vortexed from the impeller and provided with a twist Collect fluid and direct it towards the central opening. It is by the helical feedback blading the swirl of the pumped medium converted into kinetic energy.
  • the chamber pot an inwardly curved Floor has. This is fluidly of great advantage.
  • the centrifugal pump is designed such that it is at least in a mounting orientation is self-emptying.
  • the pump of the invention is so oriented that the chamber pots are arranged with the bottom up, so flows after the Turn off the centrifugal pump still located in the pump housing fluid to the inclined Surfaces of the chamber pot inwards and can thus reach the previous pump stage. Then it flows on the preferably also inclined side of the impeller, no blading has, again axially outward, until it touches the outer surface of the lower chamber pot and at this again is guided radially inward until it reaches the previous pump stage.
  • the chamber pot wall is preferably designed such that it has a stop on its outer side having. On the inside, however, it preferably has a circumferential groove. This groove serves to seal the sealing element, z. B. an O-ring record.
  • the chamber pot wall is formed such that they increase with increasing axial distance from the bottom wall preferably extended stepwise. This happens in the way that the upper edge of the chamber pot wall has an inner diameter which is approximately the outer diameter the lower portion of the chamber pot wall of the previous section corresponds. Therefore, the chamber pot with its outwardly widening section on the chamber pot bottom another chamber pot to be pushed.
  • the extended section is dimensioned that he meets the stop of the chamber pot below.
  • Fig. 1 is a section through a centrifugal pump according to the invention is shown.
  • the centrifugal pump exists from a housing 9, an intake 1 and an outlet opening 2.
  • the chamber pots 4, 4 ' are made of deep-drawn sheet metal with a thickness of made about 4 mm.
  • the wheels 3, 3 ', 3 have on their one side a spiral wall. 6 on, which 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 a return blading.
  • the rotation of the first impeller 3 is formed in the region of the first impeller 3 a pressure difference between radially inner regions and radially outer regions.
  • the conveying medium via the intake manifold 1 centrally in the centrifugal pump is sucked in.
  • the rotation of the first impeller 3 the conveying medium is due to the centrifugal force transported radially outwards.
  • the agitated fluid leaves in radial Outward direction, the first impeller 3 and reaches the annular portion 14 in which no Shovels are arranged. In this area, the kinetic energy of the pumped medium in a Pressure difference converted.
  • the conveying medium now moves axially in the direction of the arrow in FIG. 1 and thus enters the region of the bottom of the chamber pot 4. Since the fluid through the Rotation of the impeller 3 is provided with a twist, it is by the spiral pollletonschaufelung 7 recorded.
  • the return blading makes use of the swirl of the pumped medium, to guide the fluid along the inner wall of the chamber pot 4 radially inward.
  • Of the Chamber pot 4 has a central bore 12 through which the fluid to the second impeller 3 'can get.
  • the impeller 3 'already belongs to the second stage of the centrifugal pump.
  • the functional Process repeats for each individual level. After the pumped medium all stages has passed through, it is discharged through the outlet port 2 from the pump.
  • the chamber pots 4, 4 ' have an extraordinary Shape, which is made clear in the following with reference to FIGS. 2a and 2b.
  • the chamber pot 4 has been produced from a deep-drawn sheet metal.
  • Kammertopf consists of a bottom and a cylindrical wall.
  • the cylindrical wall of the chamber pot 4 has a step-like extension. On the outside wall thereby forms the stop 10.
  • the inner wall of the chamber pot 4 expands yourself.
  • a circumferential groove 11 is inserted into the wall, the recording of the O-ring 5 is used.
  • This particular form of cylindrical wall ensures in the composite Condition 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 which widens.
  • an O-ring 5 is inserted in the Groove 11 of the chamber wall of the first chamber pot 4.
  • the upper one 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 chamber pot 4, so that he perceives his sealing function.
  • the distance between chamber pot bottom 4 and Housing 9 is not determined by the O-ring 5, but only by the axial length of the side wall portions of the 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 he perceives 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 last stage has no chamber pot. Instead, a support element 8 provided, but at least on its inside expanded similarly, as the chamber pots 4, 4 'do. As a result, in the third stage, the sealing and supporting function of different parts accepted. While the support function of the defined metallic contact between the Support element 8 and the stop 10 of the second chamber pot 4 'is given, the sealing function fulfilled by the compressed O-ring 5.
  • the medium can under the influence of gravity on this Side of the impeller flow radially outward and then to the bottom of the underlying Chamber pot 4, 4 'meet. The process described is repeated until the medium to be pumped back into the intake 1 passes.
  • 4 ' is the spiral-shaped return blading 7 appropriate.
  • the number of return blades should be be equal to the number of blades of the impeller. Since the spiral-shaped blades welded 7 gap-free However, with each shovel, a corresponding work and cost commitment is required. Extensive tests have surprisingly shown that, even with a large number of Shovels in the impeller, only four return vanes lead to a very good result.
  • the following method is preferably used. First, a sheet metal blank with the final shape is pulled out of 4 mm thick stainless steel sheet. Thereafter, the return blades, preferably four pieces, are welded into the drawn round blank and in the seam area by means of grinding and polishing to the desired surface quality brought. Finally, the thus prepared round blank, together with the welded blades in pulled a second deep-drawing process gear in 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 microns produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)
EP01116365A 2000-07-08 2001-07-06 Kreiselpumpe Expired - Lifetime EP1178214B1 (de)

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 EP1178214A1 (de) 2002-02-06
EP1178214B1 true 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 (da)
AT (1) ATE295481T1 (da)
DE (2) DE10033402A1 (da)
DK (1) DK1178214T3 (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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
FR2661218B1 (fr) * 1990-04-24 1992-07-31 Salmson Pompes Ensemble de pompe centrifuge verticale.
US5318403A (en) * 1990-12-25 1994-06-07 Ebara Corporation Interstage casing for a pump made of sheet metal and method of manufacturing the same
DE4400289C2 (de) * 1994-01-07 2001-07-05 Ksb Ag Kreiselpumpe
EP0916850A1 (de) * 1997-11-13 1999-05-19 Sulzer Pumpen AG Gehäuse für Aggregate mit einem Fluid von hohem Druck
ITVI980028A1 (it) * 1998-02-13 1999-08-13 Calpeda A Spa Pompa autodescante ad eiettore con dispositivo di controllo del flusso

Also Published As

Publication number Publication date
ATE295481T1 (de) 2005-05-15
DE50106176D1 (de) 2005-06-16
DE10033402A1 (de) 2002-01-24
DK1178214T3 (da) 2005-08-01
EP1178214A1 (de) 2002-02-06

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