EP1420166B1 - Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel - Google Patents
Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel Download PDFInfo
- Publication number
- EP1420166B1 EP1420166B1 EP20030405738 EP03405738A EP1420166B1 EP 1420166 B1 EP1420166 B1 EP 1420166B1 EP 20030405738 EP20030405738 EP 20030405738 EP 03405738 A EP03405738 A EP 03405738A EP 1420166 B1 EP1420166 B1 EP 1420166B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- flange
- sealing
- pressure
- housing
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 50
- 239000007788 liquid Substances 0.000 claims description 9
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 239000013535 sea water Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 239000003566 sealing material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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
- 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
-
- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- 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
Definitions
- the invention relates to a high-pressure centrifugal pump in a pot housing with a pressure lid and a use of this pump.
- the pot housing pump is usually a multi-stage centrifugal pump in the the wheels "in line” (ie in series) or "back to back” on the shaft are arranged.
- This pump can generate high pressures.
- the rule is a drive unit on the low pressure side to the shaft coupled.
- On the opposite side is the case through the Pressure lid completed.
- the pressure lid has a flange, with the against the internal pressure, i. the pressure of a pumped liquid is sealed.
- a pot-type pump of the "back to back" type which has two multi-stage, comprises centrifugal pumps arranged on a common shaft.
- the object of the invention is to provide a pump with a sealing To provide pressure lid, in which the seal remains leak-free. These The object is achieved by the defined in claim 1 pump.
- the high pressure centrifugal pump in a pot housing includes a Pressure lid (3).
- This has a flange with a flange, with the pressure cap on a frontal and annular sealing surface of a Housing is secured by screwing.
- the flange is through the Screwing on elastically deformed.
- the sealing surface of the housing is in Area of a base zone of the flange on this with a second Sealing surface in contact.
- the two sealing surfaces are in front of the Screwing on two at least approximately radially extending conical or annular surfaces. These two surfaces close a small angle ⁇ , which is in relation to a central axis outside opens. After screwing the flange are thanks to that elastic deformations, the two sealing surfaces pressed together and Thus, the angle between the sealing surfaces is equal to zero.
- a pot housing pump 1 as shown in Fig. 1 is a pump of the type "back to back". It contains in a housing 2, a first part of the pump 1a and a second pump part 1b, which are offset by a common shaft 10 right or left in rotation. The drive end is indicated by an arrow 100 indicating the rotation. From a suction nozzle 21 at the drive end, a liquid to be conveyed passes through channels 11 in the sub-pump 1a, from which the liquid is transported at a mean pressure p L (200 to 500 bar) via further channels 12a, 12b to the drive remote end of the shaft, where it is deflected by a pressure cap 3 in the sub-pump 1b. After being transported through the second sub-pump 1b, the liquid exits from a centrally arranged discharge nozzle 22 out of the pump 1, wherein it has a final pressure of between approximately 400 and 1000 bar.
- a pump of the "in-line” type which comprises only one centrifugal pump and in which the discharge nozzle is arranged at the end, ie at the pressure cover.
- the pressure lid must seal against a pressure p L of 1000 bar.
- the pressure cover 3 of the pump 1 has - see also Fig. 2 - a flange with a flange 4, which has a sealing function.
- the pressure lid 3 carries in a profiled passage opening 31 a terminal Shaft bearings.
- Installed in the pressure cap 3 is an axial thrust relief device and a shaft seal, with the one Liquid leakage into the environment is minimized by a pressure reduction.
- the pressure cap 3 is on an end face and annular sealing surface 20 of the housing 2 screwed.
- the flange 4 is elastically deformed when screwed so that the sealing surface 20 of the Housing 2 in the region of a base zone of the flange 4 on this with a second sealing surface 40 is in contact.
- the two sealing surfaces 20, 40 lie before screwing on two at least approximately radially extending conical or annular surfaces, these two surfaces according to the invention include a small angle ⁇ with respect to a central axis 101 opens to the outside: see Fig. 3. Between the two sealing surfaces 20, 40 is thus a conical gap. The angle ⁇ this conical gap is a maximum of 1 °. After unscrewing the Flange 4 on the housing 2 are thanks to the elastic deformation of Flange 4, the two sealing surfaces 20, 40 pressed against each other: the conical gap is closed; the angle ⁇ between the sealing surfaces 20, 40 is zero in this state.
- the sealing surface 20 of the housing 2 closes with the central axis 101 or with an angle ⁇ to this parallel straight line.
- the second Sealing surface 40 encloses according to an angle ⁇ .
- the sum of three angles ⁇ , ⁇ and ⁇ is 180 °.
- the sealing surface 20 of the housing 2 contains at least one annular groove 25, wherein in each annular groove 25 a seal - in particular an O-ringseinfe employers is.
- the sealing ring is with a dot-dashed circle 5 ' indicated.
- a contact pressure p F of the flange 4 is largest there and decreases with increasing radius r: see the diagram on the right side of FIG. 4, in which the pressure curve within the contact area, namely the base zone of the flange 4, is shown.
- a liquid-permeable gap between the sealing surfaces 20, 40 is so narrow that the material of the sealing ring 5 can not be extruded into these spaces. So that the flange 4 does not lift off, the contact pressure p F must be sufficiently large with respect to the liquid pressure p L. The larger the angle ⁇ is chosen, the larger is p F in the contact area. It is therefore possible to specify the contact pressure p F so that the flange 4 can not lift off.
- the pressure cover 3 or its flange 4 can be formed so that at an internal pressure of up to 1000 bar - or more - the two sealing surfaces 20, 40 remain in the base zone of the flange 4 in contact.
- two concentric annular grooves 25 with sealing rings. 5 provided (not shown). Between the two annular grooves 25 can Sensor can be arranged with the liquid due to leakage could flow through the seal located further inside, is registrable.
- the second sealing surface 40 does not necessarily have to be on a conical surface lie; It can also be slightly bulged (convex).
- the housing 2 and / or the pressure cover 3 is usually made of a metallic material, in particular forged steel.
- the inventive pump can be used to pump water or a aqueous solution - especially seawater - at a pressure of at least 500 bar are used.
- the pressure can also be up to 1000 bar or more.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1
- Seitenansicht einer Topfgehäusepumpe,
- Fig. 2
- Längsschnitt durch einen Druckdeckel und einen Teil des Gehäuses der in Fig. 1 dargestellten Pumpe,
- Fig. 3
- Details zu einer erfindungsgemässen Pumpe im Bereich der Dichtflächen zwischen Druckdeckel und Gehäuse und
- Fig. 4
- Details zu Druckkräften, die im Bereich der in Fig. 3 dargestellten Dichtung auftreten.
Claims (9)
- Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel (3), der eine Flanschpartie mit einem Flansch (4) aufweist, mit dem der Druckdeckel auf eine stirnseitige und ringförmige Dichtfläche (20) eines Gehäuses (2) durch Aufschrauben befestigt ist, wobei der Flansch durch das Aufschrauben elastisch verformt ist, die Dichtfläche des Gehäuses im Bereich einer Basiszone des Flansches auf diesem mit einer zweiten Dichtfläche (40) in Kontakt steht, dadurch gekennzeichnet dass, die beiden Dichtflächen (20, 40) vor dem Zusammenschrauben auf zwei zumindest angenähert radial sich erstreckenden Kegel- oder Ringflächen liegen und diese beiden Flächen einen kleinen Winkel χ einschliessen, der sich bezüglich einer Zentralachse (101) nach aussen öffnet, so dass nach dem Aufschrauben des Flansches dank dessen elastischen Verformungen die beiden Dichtflächen aufeinander gepresst sind und somit der Winkel zwischen den Dichtflächen gleich Null ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Dichtfläche (20) des Gehäuses (2) mit der Zentralachse (101) einen Winkel α, die zweite Dichtfläche (40) einen Winkel β einschliessen, wobei die Summe der drei Winkel α, β und χ 180° beträgt und α vorzugsweise ein rechter Winkel ist.
- Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Dichtfläche (20) des Gehäuses (2) mindestens eine Ringnut (25) enthält, wobei in jede Ringnut eine Dichtung (5) - insbesondere ein O-Ring - eingelegt ist.
- Pumpe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass durch den Kontakt der beiden Dichtflächen (20, 40) jede Ringnut (25) mit der aufliegenden zweiten Dichtfläche (40) eine weitgehend geschlossene Kammer bildet, so dass ein Eintreten von Flüssigkeit in diese Kammer möglich, jedoch ein Austreten von Dichtungsmaterial durch Extrusion verhindert ist.
- Pumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass zwei konzentrische Ringnuten (25) mit Dichtungsringen (5) vorgesehen sind und dass zwischen den Ringnuten ein Sensor zur Registrierung einer Leckage durch die innen liegende Dichtung angeordnet ist.
- Pumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Druckdeckel (3) so ausgebildet ist, dass bei einem Innendruck von bis zu 1000 bar oder mehr die beiden Dichtflächen (20, 40) in der Basiszone des Flansches in Kontakt bleiben.
- Pumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die zweite Dichtfläche (40) leicht konvex ausgebildet ist.
- Pumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Gehäuse (2) und/oder der Druckdeckel (3) aus metallischem Material, insbesondere geschmiedetem Stahl, hergestellt sind.
- Verwendung einer Pumpe (1) gemäss einem der Ansprüche 1 bis 8 zur Förderung von Wasser oder einer wässrigen Lösung - insbesondere Meerwasser - bei einem Druck von mindestens 500 bar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20030405738 EP1420166B1 (de) | 2002-11-12 | 2003-10-14 | Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02405971 | 2002-11-12 | ||
EP02405971 | 2002-11-12 | ||
EP20030405738 EP1420166B1 (de) | 2002-11-12 | 2003-10-14 | Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1420166A1 EP1420166A1 (de) | 2004-05-19 |
EP1420166B1 true EP1420166B1 (de) | 2005-09-07 |
Family
ID=32178700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20030405738 Expired - Lifetime EP1420166B1 (de) | 2002-11-12 | 2003-10-14 | Hochdruck-Kreiselpumpe in einem Topfgehäuse mit einem Druckdeckel |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1420166B1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008062917A1 (de) | 2008-12-23 | 2010-07-01 | J. Eberspächer GmbH & Co. KG | Flanschverbindung |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3118386A (en) * | 1964-01-21 | Multi-stage centrifugal pump | ||
US2281631A (en) * | 1939-10-06 | 1942-05-05 | Worthington Pump & Mach Corp | Centrifugal pump |
CH669979A5 (de) * | 1986-04-30 | 1989-04-28 | Sulzer Ag |
-
2003
- 2003-10-14 EP EP20030405738 patent/EP1420166B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1420166A1 (de) | 2004-05-19 |
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