EP0353611B1 - Pompe centrifuge à construction en céramique - Google Patents

Pompe centrifuge à construction en céramique Download PDF

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Publication number
EP0353611B1
EP0353611B1 EP89113769A EP89113769A EP0353611B1 EP 0353611 B1 EP0353611 B1 EP 0353611B1 EP 89113769 A EP89113769 A EP 89113769A EP 89113769 A EP89113769 A EP 89113769A EP 0353611 B1 EP0353611 B1 EP 0353611B1
Authority
EP
European Patent Office
Prior art keywords
centrifugal pump
impeller
housing
housing walls
lateral
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
EP89113769A
Other languages
German (de)
English (en)
Other versions
EP0353611A3 (en
EP0353611A2 (fr
Inventor
Salvatore Scianna
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.)
KSB AG
Original Assignee
KSB AG
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 KSB AG filed Critical KSB AG
Priority to AT89113769T priority Critical patent/ATE94952T1/de
Publication of EP0353611A2 publication Critical patent/EP0353611A2/fr
Publication of EP0353611A3 publication Critical patent/EP0353611A3/de
Application granted granted Critical
Publication of EP0353611B1 publication Critical patent/EP0353611B1/fr
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
    • F04D29/4286—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
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous

Definitions

  • the invention relates to a centrifugal pump according to the preamble of the main claim.
  • GB-PS 14 926 discloses a centrifugal pump for conveying media containing solids, in which replaceable and adjustable wear walls were used for the first time. Here adjustment means are used, with the help of which the wear walls can be moved back and forth in the axial direction. This enables the setting of a Sufficiently tight gap between rotating impeller and stationary wear wall, which does not hinder the impeller rotation.
  • the invention has for its object to develop a centrifugal pump from simply constructed ceramic elements, which ensure safe and trouble-free operation with a compact design.
  • This object is achieved in accordance with the characterizing part of the main claim.
  • impellers of one or both sides of the open type the latter also being known as a vane or star impeller.
  • These impellers are in contact with the axial blade end faces located in the area of the axial impeller end faces. Due to the disc-shaped design of the impellers, extremely simple manufacture of the impellers is possible. Furthermore, the side surfaces abutting the impellers are also disc-shaped, which enables simple machining of the surfaces that are sealingly adjacent to one another and sliding on one another. As a result of this constructive solution, there is no longer a wheel side space in these centrifugal pumps.
  • the impeller In contrast to the so-called side channel pumps, in which the impeller rotates with tight play between profiled and specially designed side surfaces and there is also an exchange of momentum, in the solution according to the invention the impeller with its axial end faces, like a mechanical seal, is sealing against the side of the housing. Due to the pumping medium located in the area of the sliding surfaces and the use of ceramic materials, long-lasting and low-wear pump operation is possible with abrasive, erosive or corrosive pumping media.
  • the embodiments of the invention described in claims 4 to 6 relate to a suction opening which is known per se and is usually arranged in the region of the pump shaft; furthermore a bearing for the pump shaft provided in the suction opening, for example held by struts.
  • the through hole for the pump shaft in the housing wall opposite the suction opening can be formed directly as a shaft bearing. In contrast to the previously known solutions, this ensures a minimal shaft overhang and the impeller-shaft connection only requires an appropriately designed, form-fitting connection for torque transmission.
  • a housing wall can be part of a pot-shaped step housing which covers or accommodates the impeller. Outlet openings for the pumped medium are contained within the stage housing part surrounding the impeller. A housing wall closing the stage housing would ensure the contact between the impeller and the housing walls.
  • housing walls provided with a collar extending in the axial direction are used.
  • centrifugal pump which in its simplest design consists, as it were, of three ceramic disk-shaped elements, with a sliding rotating central disk being arranged between two outer stationary disks, has considerable advantages.
  • These disk-shaped elements can be produced in the simplest way as ceramic components and are very wear-resistant, chemically resistant, corrosion-resistant and, in addition to high mechanical strength, also have very good sliding properties.
  • the inside of the pump can Wheel side friction, the gap losses and the axial thrust load can be avoided. In addition to the long service life that is now possible, while at the same time being cost-effective, a very quick conversion is possible in the event of a repair.
  • Fig. 1 shows a single-stage centrifugal pump of radial design in section.
  • a connecting flange 3 of a suction line is attached directly.
  • Inside the housing 1 there is a suction-side, side housing wall 4 which is prevented from rotating by a projection 5 in the housing 1 attached to the circumference is secured. Sealing rings 6 inserted into grooves in the housing serve for sealing or pressing.
  • the suction-side housing wall 4 is provided here in the region of its outer diameter with a collar 7 which extends in the axial direction and which envelops an impeller 8 without a cover plate and a pressure-side housing wall 9. In the area of the pressure port 2, the collar 7 has appropriately designed flow openings for the pumped medium.
  • Another example of the anti-rotation device is shown using the example of the pressure-side housing wall 9, namely with the aid of a simple pin 12.
  • the suction-side housing wall 4 has a suction opening 13 in the area of the pump shaft 12, which is simultaneously provided with a bearing 14 for the pump shaft 12.
  • FIG. 2 shows a multi-stage pump, the flow-influencing parts of which consist of disk-shaped ceramic elements.
  • Disc-shaped housing walls 17 are arranged within an outer housing 1 between the impellers 16 of the first and second stage and are provided with flow paths 18 ensuring overflow between the individual pump stages.
  • the housing walls 17 shown can consist of a disk-shaped element with ribs attached thereon, extending in the axial direction, or in a corresponding manner machined grooves exist.
  • the flow paths 18 are formed between the ribs or from the grooves.
  • the axial end faces of the ribs each abut the rear cover disk of the impeller 16 in front.
  • the housing walls 17 are secured against rotation by appropriately designed projections 19 resting in the housing 1.
  • a pressure side housing wall 20 is formed on the pressure side.
  • the connection between the impellers 8 from FIGS. 1 and 16 from FIG. 2 and the pump shaft 12 takes place through a shaping of the pump shaft, for example with a polygonal cross section.
  • the through hole for the pump shaft 12 made in the housing wall 20 is here also as a ceramic shaft bearing 21 educated.
  • FIG. 3 shows a double-flow design.
  • the upper half of the figure shows two disk-shaped open and ceramic impellers 8, between which a cutting disk 22, also disk-shaped and rotating with the shaft 12, is arranged.
  • the lower half of the picture shows a one-piece double-flow impeller 23, which is disc-shaped in an open design.
  • a closed design of the wheels is also possible.
  • FIG. 4 shows a top view of an impeller 8, as is used for example in FIG. 1. It consists of blades 25 arranged radially and integrally formed with a hub 24, it being possible without further ado to give the blades 25 a curved course. In any case, the possible bucket loading must be reconciled with the permissible material stress.
  • the hub 24 has a triangular polygon for transmitting the torque as a cross-sectional profile. With the blade edges 26 pointing in the axial direction, the impeller slides along the housing walls.
  • FIG. 5 shows the suction-side housing wall 4 according to FIG. 1.
  • the suction opening 13 is divided here by two webs 27 which hold a bearing 14 for the pump shaft within the suction opening 13.
  • a projection 5 is formed on the outer circumference, which lies in a corresponding recess in the housing.
  • the impeller cover disks slide along the adjacent housing walls.
  • the housing 1, the suction and / or pressure ports from ceramic, or to provide them with a ceramic coating when using a different material.

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

Claims (12)

  1. Pompe centrifuge de construction centrifuge dont les éléments de conduite et/ou de refoulement de l'écoulement sont en matériaux céramiques caractérisée en ce qu'une ou plusieurs roues (8, 16, 23) en forme de disque assurent l'étanchéisation et glissent avec leurs faces frontales axiales sur des paroies latérales (4, 9, 17, 20) placées à l'intérieur d'un boîtier (1), bloquées contre la rotation ainsi que recouvrant la roue (8, 16, 23) et dans laquelle un ou des dispositifs de pression contre les paroies du boîtier agissent.
  2. Pompe centrifuge selon la revendication 1 caractérisée en ce que des roues (16, 23) ouvertes d'un côté avec leurs arêtes (26) d'aubes latérales situées dans la zone des faces frontales axiales ainsi qu'avec un disque de revêtement arrière glissent le long des paroies (4, 9, 17, 20) latérales opposées du boîtier en assurant l'étanchéisation.
  3. Pompe centrifuge selon la revendication 1 caractérisée en ce des roues de construction ouvertes des deux côtés (8, 23) avec les arêtes d'aubes (26) situées latéralement dans la zone des faces frontales axiales assurent l'étanchéisation et glissent le long des paroies (4) latérales opposées du boîtier.
  4. Pompe centrifuge selon les revendications 1 à 3 caractérisée en ce qu'au moins une des paroies (4) latérales du boîtier présente une ouverture d'aspiration (13) connue pour une roue (8) en forme de disque.
  5. Pompe centrifuge selon la revendication 4 caractérisée en ce que l'ouverture d'aspiration (13) présente un palier (14) pour l'axe d'une pompe (12).
  6. Pompe centrifuge selon les revendications 1 à 5 caractérisées en ce qu'un alésage percé dans la paroie du boîtier (9, 20) forme le palier (21) pour l'arbre de la pompe (12).
  7. Pompe centrifuge selon les revendications 1 à 6 caractérisée en ce que les paroies latérales du boîtier (4, 9, 17, 20) sont bloquées contre la rotation dans un boîtier (1) les englobant.
  8. Pompe centrifuge selon les revendications 1 à 7 caractérusée en ce que des dispositifs de pression (11) font avancer une ou plusieurs paroies latérales (4, 9, 17, 20) du boîtier, bloquées pour empêcher la rotation, contre la roue ou les roues (8, 16, 23).
  9. Pompe centrifuge selon une ou plusieurs des revendications 1 à 8 caractérisée en ce qu'une paroie (4) latérale du boîtier bloquée pour ne pas tourner est un élément d'un boîtier à étages en forme de pot.
  10. Pompe centrifuge selon une ou plusieurs des revendications 1 à 9 caractérisée en ce qu'une paroie (4) latérale du boîtier bloquée pour ne pas tourner est équipée d'une colerette (7) recouvrant totalement ou en partie la roue (8) et s'avançant dans le sens axial.
  11. Pompe centrifuge selon la revendication 10 caractérisée en ce que la colerette (7) recouvre la roue (8) et/ou une seconde paroie latérale (9) du boîtier.
  12. Pompe centrifuge selon une ou plusieurs des revendications 1 à 11 caractérisée en ce que, dans les pompes de construction à plusieurs étages, des voies d'écoulement (18) pour le liquide de refoulement sont placées dans les paroies du boîtier (17) et/ou entre les paroies latérales voisines du boîtier.
EP89113769A 1988-08-04 1989-07-26 Pompe centrifuge à construction en céramique Expired - Lifetime EP0353611B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89113769T ATE94952T1 (de) 1988-08-04 1989-07-26 Kreiselpumpe keramischer bauart.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826472 1988-08-04
DE3826472A DE3826472A1 (de) 1988-08-04 1988-08-04 Kreiselpumpe keramischer bauart

Publications (3)

Publication Number Publication Date
EP0353611A2 EP0353611A2 (fr) 1990-02-07
EP0353611A3 EP0353611A3 (en) 1990-07-18
EP0353611B1 true EP0353611B1 (fr) 1993-09-22

Family

ID=6360217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89113769A Expired - Lifetime EP0353611B1 (fr) 1988-08-04 1989-07-26 Pompe centrifuge à construction en céramique

Country Status (3)

Country Link
EP (1) EP0353611B1 (fr)
AT (1) ATE94952T1 (fr)
DE (1) DE3826472A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004159A1 (de) * 2004-01-28 2005-08-25 Sachtleben Chemie Gmbh Einsatz von statisch und dynamisch druck- und biegebeanspruchten keramischen Bauteilen als Druckentlastungselemente in Pumpen

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1256730B (it) * 1992-12-16 1995-12-15 Lowara Spa Pompa multistadio di tipo sommerso, provvista di elementi interni modulari in materiali antiusura.
DE4319616A1 (de) * 1993-06-14 1994-12-15 Wilo Gmbh Tauchmotorpumpe
GB2458526A (en) * 2008-02-05 2009-09-30 Ion Associates Ltd Moulded footwear with ventilating grooves
DE102020006364A1 (de) 2020-10-16 2022-04-21 KSB SE & Co. KGaA Kreiselpumpe mit einem Pumpengehäuse und einem Druckdeckel
CN113153756A (zh) * 2021-04-20 2021-07-23 合肥精创科技有限公司 一种渣浆泵用耐磨陶瓷过流件及其制备方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2461835A (en) * 1949-02-15 Double-acting centrifugal pump
GB131563A (fr) * 1900-01-01
GB189814926A (en) * 1898-07-07 1899-02-04 Henry Bernoulli Barlow An Improved Centrifugal Pump.
US640345A (en) * 1899-09-29 1900-01-02 George Alfred Wilberforce Centrifugal pump.
US1128822A (en) * 1913-02-11 1915-02-16 Sparks Withington Co Centrifugal pump.
DE689618C (de) * 1936-11-07 1940-03-28 Karl Plischke tark erwaermten Maschinenteilen
US2775945A (en) * 1953-08-27 1957-01-01 Reda Pump Company Sand resistant pump
US3089423A (en) * 1960-11-25 1963-05-14 Union Carbide Corp Corrosive resistant pump
US3801226A (en) * 1970-08-28 1974-04-02 Goulds Pumps Pump impeller
FR2290133A6 (fr) * 1973-02-09 1976-05-28 Materiel Processing Internal Pompe centrifuge
DE7526215U (de) * 1975-08-19 1976-04-08 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Pumpe mit korrosionsfester auskleidung
DE2556931C3 (de) * 1975-08-21 1980-03-20 Mitsui Kinzoku Engineering Service Co., Ltd. Abwasserpumpe
DE3334786A1 (de) * 1982-12-24 1984-07-05 Klöckner-Humboldt-Deutz AG, 5000 Köln Kreiselpumpe
DE3413930A1 (de) * 1984-04-13 1985-10-31 Friedrichsfeld Gmbh, Steinzeug- Und Kunststoffwerke, 6800 Mannheim Kreiselpumpe
FR2588323B1 (fr) * 1985-10-09 1990-02-23 Ngk Insulators Ltd Pompe centrifuge a entrainement magnetique
US4741668A (en) * 1987-10-13 1988-05-03 Hughes Tool Company Centrifugal pump stage with abrasion resistant impeller hub

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004004159A1 (de) * 2004-01-28 2005-08-25 Sachtleben Chemie Gmbh Einsatz von statisch und dynamisch druck- und biegebeanspruchten keramischen Bauteilen als Druckentlastungselemente in Pumpen

Also Published As

Publication number Publication date
EP0353611A3 (en) 1990-07-18
EP0353611A2 (fr) 1990-02-07
ATE94952T1 (de) 1993-10-15
DE3826472A1 (de) 1990-02-08

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