EP0797737A1 - Carter de pompe centrifuge avec carter interieur en plastique - Google Patents

Carter de pompe centrifuge avec carter interieur en plastique

Info

Publication number
EP0797737A1
EP0797737A1 EP95941672A EP95941672A EP0797737A1 EP 0797737 A1 EP0797737 A1 EP 0797737A1 EP 95941672 A EP95941672 A EP 95941672A EP 95941672 A EP95941672 A EP 95941672A EP 0797737 A1 EP0797737 A1 EP 0797737A1
Authority
EP
European Patent Office
Prior art keywords
housing
centrifugal pump
inner housing
extension
pump according
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.)
Granted
Application number
EP95941672A
Other languages
German (de)
English (en)
Other versions
EP0797737B1 (fr
Inventor
Armin Renneisen
Axel Riel
Frank Schwaab
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
Publication of EP0797737A1 publication Critical patent/EP0797737A1/fr
Application granted granted Critical
Publication of EP0797737B1 publication Critical patent/EP0797737B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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. However, there are applications in which a pumped medium can damage the metallic material due to its aggressiveness. Pump housings made of plastic are suitable for conveying media of this type, since, in addition to their high resistance to aggressive media, they also enable inexpensive production. Pump cases made entirely of plastic have prevailed for applications that are subject to low pressure loads. In those applications, however, in which the pump housing is exposed to greater external or internal pressure loads, the plastic housing is reinforced by an outer metallic housing. This counteracts the property of the plastic to flow under the influence of pressure loads.
  • a pump housing is known, the outer housing of which is designed to be divided in the axial direction of a drive shaft, the part plane running through the pressure port and the suction port.
  • This design allows the molding production of an inner housing made of plastic, which is provided with already molded suction and pressure ports.
  • the inner housing In the area of a housing cover, the inner housing has a radially projecting collar.
  • Corresponding bundles are also located at the end of the suction and pressure ports. These collars are used to fix the inner housing and at the same time form a seal for flanges of pressure lines or housing covers to be fastened to them. Because plastics are subject to shrinkage and within the pump housing If changing pressures prevail, additional measures are required to ensure that the inner housing is securely seated.
  • the invention is based on the problem of minimizing the deformation behavior of a plastic inner housing under the influence of pressure or temperature. This problem is solved according to the features of claim 1.
  • the inner housing With the attachment of a radial extension in the area of the housing division, the inner housing is fixed relative to the outer housing.
  • the effect of temperature changes on the inner housing, which cause a change in length of the inner housing, can be significantly reduced.
  • the previous solutions, which provide for the fixing of an inner housing by means of collars acting as sealing surfaces on the housing faces, have a considerable axial distance between these collars. Under the influence of temperature and the resulting changes in length, the inner housing may be deformed.
  • the solution according to the invention provides for the inner housing to be fixed in the region of a housing division running transversely to the shaft axis.
  • the inner housing part surrounding an impeller has an outer projecting extension, which is defined in the region of the housing division between the two parts of the outer housing.
  • Embodiments of the invention which are described in claims 2 and 3, define the area in which the extension is arranged on the inner housing. This is usually the central area of the housing section that a
  • Impeller wrapped Depending on the size of the pump to be used, the position of the extension in the middle area can vary somewhat in order to match the partial level of a pressure port.
  • the further refinements of the invention describe the shape and mounting of the extension. It can be designed as a circumferential annular element or as projecting sections arranged in sections.
  • the shape of the above extension depends on the manner in which the counter surfaces can be produced in the area of the partial plane of the outer housing. This depends on the technical equipment available from a manufacturer.
  • Fig. 1 shows a section through a lined centrifugal pump
  • Fig. 2 is a view of a partial housing surface with an inserted inner housing
  • Fig. 3 is a partial view of an inner housing with a separate insert
  • Partial plane 1 is perpendicular to the drawing plane. It extends transversely to the shaft axis 2, through the pressure port 3 and forms a joining zone for housing parts 4, 5 which, when assembled, form an outer housing.
  • the housing part 4 here has a suction port 6 and the housing part 5 serves to receive the outer housing closing pressure cover 7.
  • the housing parts 4, 5 and the pressure cover 7 are held together with a plurality of connecting elements 8, here screw elements, distributed over the circumference of the outer housing.
  • An abutment 10 for a shaft seal 11 is attached in the area of a bushing for the shaft 9.
  • the housing part 5 of the outer housing has a groove 12, in which an extension 13 of an inner housing 14 engages.
  • this groove 13 can be provided on only one or on both housing parts 4, 5.
  • the inner housing 14 shown here is formed in one piece, this being dependent on the material used in each case. In the case of a soft, resilient material, the molded sealing surface 15 can be pushed into the suction nozzle 6 during assembly. A different design solution is used for materials that do not allow such deformation.
  • a liner 16 attached to the pressure cover 7 serves to close the inner housing 14, a sealing ring 17 effectively preventing the escape of liquid.
  • Fig. 2 which corresponds to a section along line A - A of Fig. 1, shows a view of the housing part 4 with inserted inner housing 14. In the left half of the picture, a circumferential extension 13 is shown, while in the right half of the picture several segment-like or Extentions 13 arranged in a sector are shown.
  • the extension 13 can also be designed as an insert. This could be a one-part or multi-part component, which can, for example, also be molded into the inner housing 14.
  • Mounts 16 formed on the housing part 4 have receptacles 17 for the housing parts 4, 5 holding means holding together. In the simplest form, these are threaded holes for fastening screws or bolts.
  • FIG. 3 shows an embodiment of an extension 13 which at the same time acts as a reinforcing element for the inner housing 14.
  • the extension 13 is part of a separate insert.
  • the part of the extension 13 which engages in the plastic of the inner housing 14 can be of different shapes. What is important is a shape that hinders the movement of the inner housing 14.
  • a ring element 18 with a T-shaped cross section is shown here by way of example. Its part enclosed by the material of the inner housing can additionally reinforce the wall surface against deformation. To improve the connection, it is also possible to provide a plurality of openings 19.
  • a projecting web then serves as an extension 13 for fixing the inner housing 14 between the parts 4, 5 of the outer housing.

Landscapes

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

Abstract

L'invention concerne un carter de pompe centrifuge en deux parties, lequel est pourvu d'un carter intérieur de garnissage. Ce dernier comporte un prolongement saillant avec lequel il est fixé dans un plan de séparation du carter extérieur de pompe centrifuge.
EP95941672A 1994-12-16 1995-12-05 Carter de pompe centrifuge avec carter interieur en plastique Expired - Lifetime EP0797737B1 (fr)

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 (fr) 1994-12-16 1995-12-05 Carter de pompe centrifuge avec carter interieur en plastique

Publications (2)

Publication Number Publication Date
EP0797737A1 true EP0797737A1 (fr) 1997-10-01
EP0797737B1 EP0797737B1 (fr) 1999-03-10

Family

ID=6536059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95941672A Expired - Lifetime EP0797737B1 (fr) 1994-12-16 1995-12-05 Carter de pompe centrifuge avec carter interieur en plastique

Country Status (4)

Country Link
EP (1) EP0797737B1 (fr)
DE (2) DE4444968A1 (fr)
DK (1) DK0797737T3 (fr)
WO (1) WO1996018822A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10415589B2 (en) 2013-12-06 2019-09-17 Ksb Aktiengesellschaft Plastic pump housing consisting of an inner casing, an outer casing and filling material therebetween
WO2021109625A1 (fr) * 2019-12-06 2021-06-10 广州市拓道新材料科技有限公司 Corps de pompe en céramique

Families Citing this family (7)

* Cited by examiner, † Cited by third party
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

Family Cites Families (7)

* 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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9618822A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10415589B2 (en) 2013-12-06 2019-09-17 Ksb Aktiengesellschaft Plastic pump housing consisting of an inner casing, an outer casing and filling material therebetween
WO2021109625A1 (fr) * 2019-12-06 2021-06-10 广州市拓道新材料科技有限公司 Corps de pompe en céramique

Also Published As

Publication number Publication date
WO1996018822A1 (fr) 1996-06-20
DE59505330D1 (de) 1999-04-15
DK0797737T3 (da) 2000-06-05
EP0797737B1 (fr) 1999-03-10
DE4444968A1 (de) 1996-06-20

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