EP0797737B1 - Kreiselpumpengehäuse mit innengehäuse aus kunststoff - Google Patents
Kreiselpumpengehäuse mit innengehäuse aus kunststoff Download PDFInfo
- Publication number
- EP0797737B1 EP0797737B1 EP95941672A EP95941672A EP0797737B1 EP 0797737 B1 EP0797737 B1 EP 0797737B1 EP 95941672 A EP95941672 A EP 95941672A EP 95941672 A EP95941672 A EP 95941672A EP 0797737 B1 EP0797737 B1 EP 0797737B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- case
- centrifugal pump
- housing
- extension
- inner case
- 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
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
- F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
-
- 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
- F04D29/02—Selection of particular materials
- F04D29/026—Selection of particular materials especially adapted for liquid pumps
-
- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
Definitions
- the invention relates to a centrifugal pump according to the preamble of claim 1.
- Centrifugal pump housings are usually made of a metallic material. It However, there are applications in which a medium is due to its Aggressiveness can damage the metallic material. For such Pump media made of plastic are suitable because they in addition to its high resistance to aggressive media, also one enable inexpensive production. For low loads due to compressive forces Use cases have been made entirely of plastic Pump housing enforced. In those applications, however, where the pump housing is exposed to major external or internal pressure loads is, the plastic housing is reinforced by an outer metallic housing. This is the property of the plastic, under the influence of Flow pressures counteracted.
- a pump housing is known, the outer housing of which is one in the axial direction Drive shaft is formed divided, the part plane through the pressure port and the suction pipe runs.
- This design allows the molding production of a made of plastic inner housing, which with already molded suction and pressure port is provided. Has in the area of a housing cover the inner housing via a radially protruding collar.
- Corresponding covenants are also at the end of the suction and pressure ports. These covenants serve the Fixing the inner housing and at the same time form a seal for it fastening flanges of pressure lines or housing covers.
- a corresponding solution only with a housing division transverse to the drive axis, shows DE-B 20 01 267. Since plastics are subject to shrinkage, and within alternating pressures prevail in the pump housing are additional Measures for the secure installation of the inner housing are required.
- a water jet propulsion system for ships is known from US Pat. No. 5,346,363, in which only in the impeller area a partial plastic lining between the flanges is jammed.
- a spiral space downstream of the impeller consists of metal and is not resistant to aggressive media. If improper The ring-shaped part of the clamped between flanges can be assembled Lining will be destroyed.
- US-A 2 110 079 shows a centrifugal pump for conveying media containing sand. It has a metallic inner housing for wear purposes.
- One for Assembly of the metallic inner housing is necessary by a Sealing cord sealed. When assembling parts of the sealing cord are in radial grooves open to the outside are pressed. After the wear-related Destruction of the inner housing, the seal is destroyed, so that on the radial Grooves create a leak that acts as a closure indicator for an operator serves. If a leak occurs, the inner housing must be replaced.
- a such a solution is only conditionally tolerable when pumping water.
- a slurry pump is known, the outer housing encased a rubber lining.
- the rubber lining consists of two with theirs Face-to-face half-shells. In the area of these end faces are additional flanges arranged together with the flanges of the Outer housing pressed together in a joint joint are.
- the tightness of such pumps is due to the area of application low requirements, as a possible leak is only an indicator of represents a renewal of the lining.
- the invention is based on the problem of the deformation behavior of a To minimize plastic inner housing under pressure or temperature influences. This problem is solved according to the features of claim 1.
- the solution according to the invention provides for reducing the deformations Definition of the inner housing in the area of a transverse to the shaft axis Housing division before.
- the inner housing part surrounding an impeller has a outer projecting extension, which in the area of the housing division between the both parts of the outer housing is fixed.
- the division of the outer housing runs at one single-stage centrifugal pump with axial suction and radial pressure nozzle through the pressure port.
- the inner housing can then molded or molded pressure nozzle lining be. Another one is available for the suction nozzle lining constructive solution.
- Embodiments of the invention that in claims 2 and 3 define the area in which the Extent is arranged on the inner housing. It is common the middle area of that housing section, the one Impeller wrapped. Depending on the size of the pump to be used, the location of the extension in the central area can be somewhat vary to with the sub-level of a pressure port agree.
- the further configurations of the invention describe the shape and holding the extension. It can be circulating annular element or arranged in sections projecting sections be designed.
- the shape of the The above extent depends on the way with which the counter surfaces in the area of the partial plane of the Outer housing can be produced. This depends on the at a manufacturer of existing technical equipment.
- the invention is based on the example of a one-stage Centrifugal pump shown, but not limited to.
- the Partial plane 1 is perpendicular to the drawing plane. she runs transverse to the shaft axis 2, through the pressure port 3 and forms a joining zone for housing parts 4, 5, which are assembled Form the outer housing.
- the housing part 4 has a suction port 6 and the Housing part 5 serves to receive the outer housing closing pressure cover 7. With several over the circumference of the outer housing arranged distributed connecting elements 8, here screw elements, the housing parts 4, 5 and Pressure cover 7 held together. In the area of an implementation for the shaft 9 is an abutment 10 for a shaft seal 11 attached.
- the housing part 5 of the Outer housing via a groove 12 into which an extension 13 of an inner housing 14 engages.
- this groove 13 on only one or on both housing parts 4, 5 to be appropriate.
- the inner housing 14 shown here is formed in one piece, this depends on the particular Material used. With a soft compliant Material can the molded sealing surface 15 in a Assembly to be pushed into the suction nozzle 6. With materials, that do not allow such a deformation finds one other constructive solution application.
- a lining 16 attached to the pressure cover 7 serves the purpose Closure of the inner housing 14, wherein a sealing ring 17th effectively prevents fluid leakage.
- the protruding extension acts as a for the inner housing 14 Fixed camp. Instead of the previously used for the deformation calculation width B used is only the distance from the Extension 13 to use the end points of the width B. This makes the inner housing 14 considerably more resistant against changes in shape due to temperature influences.
- FIG. 2 which is a section along line A - A of FIG. 1st corresponds to, shows a view of the housing part 4 with inserted inner housing 14.
- the extension 13 can also as Insert to be formed. This could be a one or be a multi-part component, which, for example, in the Inner housing 14 can be molded with.
- molded brackets 16 On the housing part 4 molded brackets 16 have receptacles 17 for the Housing parts 4, 5 holding fasteners together. In the In the simplest form, these are threaded holes for fastening Screws or bolts.
- FIG. 3 shows an embodiment of an extension 13 shown, which for the inner housing 14 simultaneously as Reinforcing element acts.
- the extension 13 is here Part of a separate insert.
- the one in the Plastic of the inner housing 14 engaging part of the Extension 13 can be of different shapes. Important is an obstacle to the movement of the inner housing 14 Shape.
- An example is a T-shaped one in cross section Ring element 18 shown. Its from the material of the inner casing enclosed part can additionally reinforce the Effect wall surface against deformation. For improvement the connection it is also possible to have a variety of openings 19 to attach.
- a protruding web then serves as an extension 13 for fixing the inner housing 14 between the parts 4, 5 of the outer case.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1
- einen Schnitt durch eine ausgekleidete Kreiselpumpe, die
- Fig. 2
- eine Ansicht auf eine Gehäuseteilfläche mit eingelegtem Innengehäuse und die
- Fig. 3
- eine Teilansicht auf ein Innengehäuse mit separatem Einlegeteil
Claims (6)
- Kreiselpumpe mit einem Laufrad zur Förderung aggressiver Medien, mit einem kräfteübertragenden, mindestens zweiteiligen Außengehäuse (4, 5) und einem flüssigkeitsführenden, aus Kunststoff bestehenden einteiligen Innengehäuse (14), das Innengehäuse (14) mit einer radial vorstehenden Erstreckung (13) am Außengehäuse anliegt und in einer Gehäuseteilung (1) festgelegt ist, das Innengehäuse (14) durch eine deckelartige Auskleidung (16) dichtend verschlossen ist, das Innengehäuse (14) und die deckelartige Auskleidung (16) alle mit dem Fördermedium in Kontakt tretenden Oberflachen des Außengehäuses (4, 5) abdecken und das Außengehäuse (4, 5) eine quer zu einer Wellenachse (2) verlaufende Gehäuseteilung aufweist, dadurch gekennzeichnet, daß die Gehäuseteilung des Außengehäuses (4, 5) in einer durch den Druckstutzen (3) verlaufenden Teilebene (1) liegt und daß die radiale Erstreckung (13) im mittleren Bereich einer das Laufrad umgebenden äußeren Umfangsfläche des einteiligen Innengehäuses (14) angeordnet ist.
- Kreiselpumpe nach Anspruch 1, dadurch gekennzeichnet, daß sich der mittlere Bereich des Innengehäuses (14) über maximal 50 % der im Bereich des Außendurchmessers feststellbaren Breite (B) des Innengehäuses (14) erstreckt.
- Kreiselpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die am Innengehäuse (14) vorstehende Erstreckung (13) ein- oder mehrteilig ist.
- Kreiselpumpe nach Anspruch 3, dadurch gekennzeichnet, daß die vorstehende Erstreckung (13) des Innengehäuses (14) in der Teilebene (1) der Gehausetellung eingeklemmt ist.
- Kreiselpumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die vorstehende Erstreckung (13) das Innengehäuse (14) im Außengehäuse (4, 5) positioniert.
- Kreiselpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Erstreckung (13) als ein- oder mehrteiliges Einlegeteil (16) ausgebildet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4444968A DE4444968A1 (de) | 1994-12-16 | 1994-12-16 | Kreiselpumpengehäuse mit Innengehäuse aus Kunststoff |
DE4444968 | 1994-12-16 | ||
PCT/EP1995/004782 WO1996018822A1 (de) | 1994-12-16 | 1995-12-05 | Kreiselpumpengehäuse mit innengehäuse aus kunststoff |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0797737A1 EP0797737A1 (de) | 1997-10-01 |
EP0797737B1 true EP0797737B1 (de) | 1999-03-10 |
Family
ID=6536059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95941672A Expired - Lifetime EP0797737B1 (de) | 1994-12-16 | 1995-12-05 | Kreiselpumpengehäuse mit innengehäuse aus kunststoff |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0797737B1 (de) |
DE (2) | DE4444968A1 (de) |
DK (1) | DK0797737T3 (de) |
WO (1) | WO1996018822A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013225065A1 (de) | 2013-12-06 | 2015-06-11 | Ksb Aktiengesellschaft | Pumpengehäuse in Kunststoffbauweise |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29703739U1 (de) * | 1997-03-01 | 1998-08-13 | H. Wernert & Co. oHG, 45476 Mülheim | Radialpumpe für aggressive Flüssigkeiten |
US6988870B2 (en) * | 2004-01-27 | 2006-01-24 | Weir Slurry Group, Inc. | Casing for a centrifugal pump |
ES1067274Y (es) * | 2008-02-05 | 2008-08-01 | Bombas Psh S A | Bomba centrifuga de flujo mixto para piscinas |
CN102374199A (zh) * | 2011-11-18 | 2012-03-14 | 宜兴市宙斯泵业有限公司 | 耐腐耐磨离心泵蜗壳 |
DE102012108354B4 (de) | 2012-09-07 | 2016-05-12 | Herborner Pumpenfabrik J. H. Hoffmann Gmbh & Co. Kg | Pumpe und Protektor für Pumpe |
KR101427791B1 (ko) * | 2013-01-07 | 2014-08-08 | (주)플로닉스 | 플라스틱 펌프 제조방법 |
CN105570183A (zh) * | 2015-12-10 | 2016-05-11 | 安徽凯特泵业有限公司 | 汽车制造喷漆工艺用离心泵 |
CN112922902A (zh) * | 2019-12-06 | 2021-06-08 | 广州市拓道新材料科技有限公司 | 一种陶瓷泵体 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2110079A (en) * | 1937-04-13 | 1938-03-01 | Clyde A Butler | Sand pump |
DE1879536U (de) * | 1963-05-08 | 1963-09-19 | Ruhrkunststoff G M B H | Kreiselpumpe. |
US3551067A (en) * | 1969-01-22 | 1970-12-29 | Duriron Co | Lined corrosion resistant pump |
SE428957B (sv) * | 1975-06-02 | 1983-08-01 | Warman Int Ltd | Invendigt fodrat hogtryckspumphus |
US4722664A (en) * | 1981-06-05 | 1988-02-02 | The Duriron Company, Inc. | Lined corrosion resistant pump |
DE3916915A1 (de) * | 1989-05-24 | 1990-11-29 | Abs Pumpen Ag | Pumpengehaeuse |
US5346363A (en) * | 1993-04-23 | 1994-09-13 | Outboard Jet - Trutol Bearings, Inc. | Liner for a water jet propulsion pump |
-
1994
- 1994-12-16 DE DE4444968A patent/DE4444968A1/de not_active Withdrawn
-
1995
- 1995-12-05 DK DK95941672T patent/DK0797737T3/da active
- 1995-12-05 EP EP95941672A patent/EP0797737B1/de not_active Expired - Lifetime
- 1995-12-05 DE DE59505330T patent/DE59505330D1/de not_active Expired - Lifetime
- 1995-12-05 WO PCT/EP1995/004782 patent/WO1996018822A1/de active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013225065A1 (de) | 2013-12-06 | 2015-06-11 | Ksb Aktiengesellschaft | Pumpengehäuse in Kunststoffbauweise |
WO2015082679A1 (de) | 2013-12-06 | 2015-06-11 | Ksb Aktiengesellschaft | Kunststoff-pumpengehäuse, das aus einer innenschale und einer aussenschale besteht, mit füllmaterial dazwischen |
DE102013225065B4 (de) * | 2013-12-06 | 2016-04-14 | Ksb Aktiengesellschaft | Pumpengehäuse in Kunststoffbauweise |
Also Published As
Publication number | Publication date |
---|---|
DK0797737T3 (da) | 2000-06-05 |
DE59505330D1 (de) | 1999-04-15 |
WO1996018822A1 (de) | 1996-06-20 |
DE4444968A1 (de) | 1996-06-20 |
EP0797737A1 (de) | 1997-10-01 |
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