EP1906029B1 - Pompe centrifuge avec boîtier intérieur et extérieur - Google Patents

Pompe centrifuge avec boîtier intérieur et extérieur Download PDF

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Publication number
EP1906029B1
EP1906029B1 EP06120910A EP06120910A EP1906029B1 EP 1906029 B1 EP1906029 B1 EP 1906029B1 EP 06120910 A EP06120910 A EP 06120910A EP 06120910 A EP06120910 A EP 06120910A EP 1906029 B1 EP1906029 B1 EP 1906029B1
Authority
EP
European Patent Office
Prior art keywords
outer casing
centrifugal pump
joining face
casing
outlet
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.)
Not-in-force
Application number
EP06120910A
Other languages
German (de)
English (en)
Other versions
EP1906029A1 (fr
Inventor
Willem Cornelis De Ronde
Cornelis Albert Van Der Neut
Hasan Hüseyin Bugdayci
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.)
IHC Holland lE BV
Original Assignee
IHC Holland lE BV
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 IHC Holland lE BV filed Critical IHC Holland lE BV
Priority to AT06120910T priority Critical patent/ATE452295T1/de
Priority to EP06120910A priority patent/EP1906029B1/fr
Priority to DE602006011162T priority patent/DE602006011162D1/de
Priority to CN200710182198XA priority patent/CN101220817B/zh
Publication of EP1906029A1 publication Critical patent/EP1906029A1/fr
Application granted granted Critical
Publication of EP1906029B1 publication Critical patent/EP1906029B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/4286—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber

Definitions

  • the invention relates to a centrifugal pump, comprising an inner casing, an outer casing surrounding the inner casing in a fluid tight way, said outer casing having an inlet at an axial end and a tangentially oriented outlet at its circumference, and said outer casing comprising at least two outer casing parts which can be joined to each other in a fluid tight way along a joining face.
  • centrifugal pump Such a centrifugal pump is generally known.
  • This centrifugal pump has an impeller which is rotatably mounted within the inner casing, and a shaft connected to the impeller.
  • the shaft extends out of the outer casing, and can be driven by a motor.
  • the inner casing comprises a tangentially oriented outflow nozzle. This outflow nozzle is received in the corresponding outlet of the outer casing.
  • the outer casing of this centrifugal pump consists of two outer casing halves, i.e. the two outer casing parts form two symmetrical cup-shaped parts. These outer casing halves each have an end face provided with flanges, which can be bolted together in a fluid tight way. The joining face of the clamped outer casing halves extends centrally between them. Because of this configuration, the loads exerted on the outer casing can be dissipated effectively.
  • the joining face between the two casing parts also divides the outlet of the outer casing into two halves.
  • the outlet of the outer casing also comprises an outlet flange at its end face, which flange is intended for being bolted together with a flange of a discharge pipe.
  • the central joining face between the two outer casing halves meets the joint between the clamped flanges of the outlet and discharge tube.
  • there is a relatively high risk of leakage If the two outer casing halves and/or the flanges of the outlet and discharge pipe are not precisely joint together perpendicularly, a small slit will be present, which can jeopardize the fluid tight connection between the outer casing parts and the discharge pipe.
  • WO 2005/024243 which is considered as the closest prior art to the subject-matter of claim 1, discloses a pump housing assembly which includes a pump casing and a liner.
  • the pump casing includes at least two parts which are adapted to be connected together in an assembled position.
  • the pump casing has opposed front and rear sides.
  • the two parts of the pump casing when in the assembled position have a common junction region which is disposed within one or more planes which pass through the front and rear sides of the pump casing when in the assembled position.
  • the object of the invention is to provide a centrifugal pump, wherein the risk of leakage is reduced.
  • said joining face extends along at least two planes that are oriented at an angle with respect to each other, said joining face running continuously outside of the tangentially oriented outlet at the circumference of the outer casing.
  • the joining face runs alongside of the tangentially oriented outlet at the circumference of the outer casing, i.e. the joining face does not intersect with the outlet.
  • the tangentially oriented outlet at the circumference of the outer casing is situated as a whole in one of the casing parts.
  • One casing part is provided with an integral outlet.
  • An outlet flange delimiting the outlet can therefore be uninterrupted. It is then possible to bolt the flange of a discharge pipe securely together with the outlet flange in a leakproof manner.
  • a centrifugal pump which comprises an outer casing that is provided with a cup-shaped outer casing part and a covering plate for closing the outer casing part.
  • the outer casing part has such great dimensions that it fully receives the inner casing of the centrifugal pump.
  • This outer casing part comprises a flange at its side end, which is bolted together with the covering plate.
  • the outlet of the outer casing then completely extends within the outer casing part, which reduces the risk of leakage.
  • the joining face between the outer casing part and the covering plate is flat, i.e. it does not extend in at least two planes that are oriented at an angle with respect to each other.
  • the covering plate as a whole is thus situated on a side of the outer casing, so that the strength of the outer casing is unevenly distributed. It may therefore be required to reinforce the outer casing, which increases the manufacturing costs.
  • the joining face comprises a central section which substantially coincides with a central plane of the outer casing.
  • the outer casing has a width extending in the axial direction.
  • the width of the outer casing will be defined by the distance between the outer side surfaces of the outer casing parts.
  • the joining face extends partially along half of this width. As a result, the strength of the outer casing is relatively well distributed.
  • the joining face between the two outer casing parts comprises a side section which extends adjacent to the outlet of the outer casing.
  • This side section of the joining face at least partially extends along a side of the outer casing thus circumventing the outlet of the outer casing, so that the flange of the outlet can be integrally formed.
  • the side section of the joining face runs substantially parallel to central section.
  • the side section and the central section are both parallel to the central plane of the outer casing.
  • the joining face may comprise a connecting section which extends between the central section and the side section of the joining face.
  • the central section and the side section of the joining face are connected to each other by means of the connecting section.
  • the connecting section is inclined with respect to the central plane of the outer casing.
  • the joining face is formed by three partial faces, i.e. the central section, the connecting section and the side section.
  • the central section of the joining face is located substantially in the central plane of the outer casing, i.e. the outer casing parts have substantially the same width on either side of the central section.
  • the side section of the joining face extends in a plane that is at a distance from the central plane, such that the side section does not intersect with the outlet of the outer casing.
  • the plane of the side section may be inclined with respect to the central plane.
  • the connecting section of the joining face extends in a plane oriented at an angle with respect to the planes of the central section and side section.
  • the connecting section connects the central section and side section together.
  • the joining face can be constructed in a different manner.
  • the joining face may comprise a connecting section that extends in two different planes that are inclined with respect to each other.
  • these planes may be separated, i.e. the connecting section forms two connecting sections. This depends, for example, on the location of the outlet.
  • both outer casing parts may be generally cup-shaped. In that case, they may both have a flange at an end face, said flanges being connected to each other in a fluid tight way. It is noted that the casing parts can also be connected to each other in a fluid tight way in various other ways. For example, the casing parts can be clamped together or snap-fitted to each other.
  • the pump may comprise an impeller which is rotatably mounted within the inner casing, and a shaft connected to the impeller, said shaft extending out of the outer casing at its axial end opposite the inlet.
  • the outer casing comprises a shaft cover through which the shaft extends in a fluid tight way.
  • the outer casing comprises an inlet cover through which an inlet tube part extends.
  • the centrifugal pump shown in figures 1-3 comprises a housing 1, which consists of an inner casing 2 and an outer casing 3.
  • the inner casing 2 is mounted within the outer casing 3, i.e. the outer casing 3 surrounds the inner casing 2 as a whole.
  • the inner casing 2 usually consists of a hard, wear-resistant material, for example hardened steel or cast iron.
  • the materials which are transported through the centrifugal pump e.g. materials which have been obtained through dredging or mining operations, may comprise highly abrasive components. Furthermore, such materials may comprise lumps of material which may lead to impact forces while being transported through the inner casing 2. Additionally, pressure surges may occur within the inner casing 2 when performing dredging or mining operations.
  • the centrifugal pump, in particular the inner casing 2 is subjected to wear.
  • the outer casing 3 intends to reduce this risk.
  • the outer casing 3 has been designed to contain any materials which may be flung out of a ruptured inner casing 2.
  • the outer casing 3 comprises a material which is well fit for accommodating impacts and the like.
  • the material of the outer casing 3 preferably comprises a tough and yieldable material, which is also fit for maintaining the overpressure within the outer casing 3.
  • the outer casing 3 is made of, for example, plastic.
  • the inner casing 2 of the centrifugal pump forms a spiral casing.
  • the inner casing 2 has an an inlet 20 at an axial end and a tangentially oriented outlet 21 at its circumference.
  • the outlet 21 forms a nozzle or spout.
  • the inner casing 2 comprises an impeller 4 that is mounted on a shaft 5, which is rotatably supported with respect to a frame 7 by means of the bearing arrangement 6. Thus the impeller 4 can rotate within the inner casing 2.
  • the outer casing 3 comprises a shaft cover 10 which by means of the sealing, which is known per se, is sealed with respect to the shaft 5.
  • the shaft cover is usually referred to as water chamber.
  • an inlet tube (not shown) can be connected, known per se as well.
  • the outer casing 3 of the centrifugal pump has an inlet 22 at an axial end and a tangentially oriented outlet 23 at its circumference.
  • the inlet 22 is aligned with the inlet 20 of the inner casing 2, while the outlet 23 corresponds to the outlet nozzle 21 of the inner casing 2.
  • the inner casing 2 can rise to e.g. 40 atm, the inner casing can be supported from the outside by pressurising the internal space of the outer casing 3.
  • the outer casing 3 comprises a pressure connection 13 by means of which an overpressure can be maintained which, for example, amounts to about 80% of the overpressure within the inner casing 2.
  • the outer casing 3 consists of two outer casing parts 14, 15.
  • the casing parts 14, 15 are both cup-shaped having a rim portion 18.
  • the rim portion 18 provides a certain inherent stifness to the casing parts 14, 15.
  • the outer casing part 14 has a flange 16, while the outer casing part 15 is provided with a corresponding flange 17. These flanges 16, 17 can be joined together in a leakproof manner, e.g. using bolts.
  • the flanges 16, 17 define a joining face of the outer casing parts 14, 15.
  • the outer casing parts 14, 15 and their flanges 16, 17 are designed such that this joining face extends along at least two intersecting planes that are oriented at an angle with respect to each other. In other words, the joining face between the outer casing parts 14, 15 is not flat - it contains at least one twist.
  • the cup-shaped outer casing parts 14, 15 of the outer casing 3 are non-symmetrical with respect to the central plane A of the outer casing 3.
  • the joining face between the outer casing parts 14, 15 of this exemplary embodiment comprises a central section 25 which substantially coincides with the central plane A of the outer casing 3, i.e. the central section 25 is located at half of the width w of the outer casing 3.
  • the joining face is thus situated at least partially symmetrically with respect to the central plane. This is beneficial for the stifness of the outer casing 3.
  • the joining face further comprises a side section 27 which extends adjacent to the outlet 23 of the outer casing 3.
  • the side section 27 is inclined with respect to the vertical.
  • the upper connecting line of the side section 27 at the top of the outer casing 3, adjacent to the outlet 23, is substantially parallel to central section 25 (see figure 1 ). From there the side section 27 forms an oblique section that runs inwardly downwards. The side section 27 then continues into the central section 25 (see figure 3 ).
  • the outlet 23 of the outer casing 3 extends only in the outer casing part 14.
  • the flange 16 of the outer casing part 14 can therefore also extend continuously around the outlet 23 of the outer casing 3.
  • the flange 16 delimiting the outlet 23 of the outer casing 3 is uninterrupted. This enables a reliable leakproof connection to an outlet tube (not shown).
  • the joining face also has a connecting section 26 which extends between the central section 25 and the side section 27 of the joining face (see figure 1 ).
  • the connecting section 26 is inclined with respect to the central plane of the outer casing 3.
  • the outer casing 3 Since the joining face between the outer casing parts 14, 15 is devised around the outlet 23 of the outer casing 3, while a portion of the joining face remains in the central plane of the outer casing 3, the outer casing 3 enables attachment of an outlet tube in a leakproof manner and has sufficient stifness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (10)

  1. Pompe centrifuge comprenant un carter intérieur (2), un carter extérieur (3) entourant ledit carter intérieur (2) de manière étanche aux fluides, ledit carter extérieur (3) comportant une admission (22) à une extrémité axiale et, sur sa circonférence, une sortie (23) orientée tangentiellement, et ledit carter extérieur (3) comprenant au moins deux parties (14, 15) pouvant être reliées l'une à l'autre de manière étanche aux fluides, le long d'une surface de liaison, caractérisée par le fait que ladite surface de liaison s'étend le long d'au moins deux plans orientés en décrivant un angle l'un vis-à-vis de l'autre ; et par le fait que ladite surface de liaison offre un tracé continu à l'extérieur de la sortie (23) orientée tangentiellement, sur la circonférence du carter extérieur (3).
  2. Pompe centrifuge selon la revendication 1, dans laquelle la surface de liaison englobe une région centrale (25) coïncidant sensiblement avec un plan médian du carter extérieur (3).
  3. Pompe centrifuge selon la revendication 1 ou 2, dans laquelle la surface de liaison englobe une région latérale (27) dont l'étendue est adjacente à la sortie (23) du carter extérieur (3).
  4. Pompe centrifuge selon la revendication 3, dans laquelle la région latérale (27) de la surface de liaison s'étend, pour l'essentiel, parallèlement à la région centrale (25).
  5. Pompe centrifuge selon la revendication 3 ou 4, dans laquelle la surface de liaison englobe au moins une zone de jonction (26) qui s'étend entre la région centrale (25) et la région latérale (27) de ladite surface de liaison.
  6. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle les parties (14, 15) du carter extérieur présentent, l'une et l'autre, une configuration générale en coupelle et possèdent une bride (16, 17) à une face extrême, lesdites brides (16, 17) étant reliées mutuellement d'une manière étanche aux fluides.
  7. Pompe centrifuge selon l'une des revendications précédentes, dans laquelle un raccord (13) est prévu pour entretenir une surpression à l'intérieur du carter extérieur (3).
  8. Pompe centrifuge selon l'une des revendications précédentes, ladite pompe comprenant une hélice (4) montée à rotation à l'intérieur du carter intérieur (2), et un arbre (5) relié à ladite hélice (4), ledit arbre (5) s'étendant hors du carter extérieur (3) à son extrémité axiale opposée à l'admission (22).
  9. Pompe centrifuge selon la revendication 8, dans laquelle le carter extérieur (3) englobe un couvercle (8) d'arbre, traversé par l'arbre (5) d'une manière étanche aux fluides.
  10. Utilisation d'une pompe centrifuge conforme à l'une des revendications précédentes.
EP06120910A 2006-09-19 2006-09-19 Pompe centrifuge avec boîtier intérieur et extérieur Not-in-force EP1906029B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT06120910T ATE452295T1 (de) 2006-09-19 2006-09-19 Kreiselpumpe mit innen- und aussengehäuse
EP06120910A EP1906029B1 (fr) 2006-09-19 2006-09-19 Pompe centrifuge avec boîtier intérieur et extérieur
DE602006011162T DE602006011162D1 (de) 2006-09-19 2006-09-19 Kreiselpumpe mit Innen- und Aussengehäuse
CN200710182198XA CN101220817B (zh) 2006-09-19 2007-09-19 具有内壳体和外壳体的离心泵及其应用

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06120910A EP1906029B1 (fr) 2006-09-19 2006-09-19 Pompe centrifuge avec boîtier intérieur et extérieur

Publications (2)

Publication Number Publication Date
EP1906029A1 EP1906029A1 (fr) 2008-04-02
EP1906029B1 true EP1906029B1 (fr) 2009-12-16

Family

ID=37877300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06120910A Not-in-force EP1906029B1 (fr) 2006-09-19 2006-09-19 Pompe centrifuge avec boîtier intérieur et extérieur

Country Status (4)

Country Link
EP (1) EP1906029B1 (fr)
CN (1) CN101220817B (fr)
AT (1) ATE452295T1 (fr)
DE (1) DE602006011162D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11885345B2 (en) 2019-04-05 2024-01-30 Ihc Holland Ie B.V. Pump

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2005810C2 (en) 2010-12-03 2012-06-05 Ihc Syst Bv Centrifugal pump and a double bent rotor blade for use in such a centrifugal pump.
NL2008180C2 (en) 2012-01-25 2013-07-29 Ihc Holland Ie Bv Pump and a method of manufacturing such a pump.
EP3225843B1 (fr) * 2016-03-30 2019-05-08 Damen Dredging Equipment B.V. Pompe à boue
WO2022150871A1 (fr) * 2021-01-16 2022-07-21 Weir Slurry Group, Inc. Chemise principale pour une pompe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110079A (en) * 1937-04-13 1938-03-01 Clyde A Butler Sand pump
US5127800A (en) * 1984-03-20 1992-07-07 Baker Hughes Incorporated Flow-stabilizing volute pump and liner
CN2103674U (zh) * 1991-08-07 1992-05-06 谢文化 抽砂专用的泵
US7329094B2 (en) * 2002-09-19 2008-02-12 Dü{umlaut over ( )}chting Pumpen Maschinenfabrik GmbH & Co. KG Production of machine parts provided with a mineral casting
TWI350887B (en) * 2003-09-04 2011-10-21 Weir Minerals Australia Ltd Pump housing assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11885345B2 (en) 2019-04-05 2024-01-30 Ihc Holland Ie B.V. Pump

Also Published As

Publication number Publication date
CN101220817B (zh) 2012-07-04
DE602006011162D1 (de) 2010-01-28
EP1906029A1 (fr) 2008-04-02
CN101220817A (zh) 2008-07-16
ATE452295T1 (de) 2010-01-15

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