EP3242039A1 - Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle - Google Patents

Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle Download PDF

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Publication number
EP3242039A1
EP3242039A1 EP17159213.2A EP17159213A EP3242039A1 EP 3242039 A1 EP3242039 A1 EP 3242039A1 EP 17159213 A EP17159213 A EP 17159213A EP 3242039 A1 EP3242039 A1 EP 3242039A1
Authority
EP
European Patent Office
Prior art keywords
pump
pump housing
housing
cover
pump cover
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.)
Withdrawn
Application number
EP17159213.2A
Other languages
German (de)
English (en)
Inventor
Paul Skljarow
Reinhard Dittmann
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3242039A1 publication Critical patent/EP3242039A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps 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
    • F04D29/406—Casings; Connections of working fluid 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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative 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
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F05D2260/36—Retaining components in desired mutual position by a form fit connection, e.g. by interlocking

Definitions

  • the invention relates to a delivery unit according to the preamble of the main claim.
  • the disadvantage is that, as a result of the local deformations of the pump housing, deformations may also occur on the side of the pump cover facing the pump chamber, depending on the tool generating the deformations, which may affect the clearance for the impeller arranged in the pump chamber.
  • the delivery unit according to the invention with the characterizing features of the main claim has the advantage that deformations on the pump cover, in particular in the pump chamber, are avoided by the cut edges are each arched to your indentation.
  • the deformation of the pump housing is achieved by radially with respect to the pump axis dipping into the pump housing tools, the underside curved arched inwards.
  • the indentation generating tool is correspondingly formed with a tapered tool tip.
  • the indentations in the direction of the pump axis are pointed, triangular or semicircular. According to the advantageous embodiment, spatially seen result tetrahedral indentations.
  • the indentations are provided in the region of a flange of the pump housing.
  • the curling ensures that a prestressing force is built up between the pump cover and an intermediate housing. At the same time, the pump cover is centered.
  • this biasing force is further enhanced.
  • the indentations also serve to maintain this preload force at all operating temperatures and throughout the product life.
  • Fig.1 shows a three-dimensional partial view of a delivery unit with indentations according to the invention for attachment of a pump cover.
  • the delivery unit serves to convey a fluid.
  • the delivery unit is designed as an electric fuel pump.
  • the delivery unit comprises a cylindrical or pot-shaped pump housing 1 with an end opening 2, in which a pump cover 4 occluding the opening 2 is arranged.
  • the pump cover 4 is fixed and secured within the pump housing 1 in the axial direction with respect to a pump axis 7 of the delivery unit. This is achieved by crimping, ie bending over the edge of the opening 2 and through a plurality of local indentations 10 on the pump housing 1 distributed over the circumference of the pump housing 1, which are produced by local deformation of the pump housing 1 by means of corresponding tools 8.
  • a tool 8 is after Figure 3 pressed into the material of the pump housing 1 at the corresponding position in the radial direction with respect to the pump axis 7 and penetrates with a predetermined depth into the material and deforms this plastically.
  • the pump housing 1 is locally severed at the indentations 10 each at a cutting edge 12.
  • the indentations 10 are in the region of the flange 9 of the pump housing. 1
  • Fig.2 shows a sectional view of the delivery unit after Fig.1 with a recess according to the invention.
  • an intermediate housing 3 and the opening 2 closing the pump cover 4 are arranged in the opening 2 of the pump housing 1. Between the pump cover 4 and the intermediate housing 3, a pump chamber 5 is enclosed, in which an impeller 6 is rotatably mounted for fluid delivery.
  • the recesses 10 engage behind a shoulder 11 of the pump cover 4 and each have a tapered, the shoulder 11 of the pump cover 4 facing base.
  • the recesses 10 are formed, for example tetrahedral, wherein the shoulder 11 of the pump cover 4 facing triangular Area of the hollow tetrahedron is the base area.
  • the base can also be pointed, semi-circular or semi-oval.
  • the pump cover 4 is pressed by the indentations 10 of the pump housing 1 in the axial direction with respect to the pump axis 7 against the intermediate housing 3, wherein the intermediate housing 3 is supported on the pump housing 1, for example on a shoulder 15 of the pump housing 1. In this way, the between the Pump cover 4 and the intermediate housing 3 formed pump chamber 5 sealed.
  • the shoulder 11 of the pump cover 4 has, for example, a bevel 13 on the side facing away from the pump chamber 5 in order to ensure a certain prestressing force acting on the pump cover 4.
  • the cut edges 12 are arched in each case towards their indentation 10. In this way, the overlap between the pump housing 1 and the pump cover 4 is reduced, so that the mechanical loads on the pump cover 4 and thus also its deformation can be reduced.
  • FIG 3 shows three views of the tool for producing the indentations according to the invention Fig.1 and Fig.2 ,
  • the tool 8 has a longitudinal extension and at its free end a dome 16, which is pressed into the pump housing 1.
  • the dome 16 is executed pointed or rounded.
  • the tool 8 is curved inwards.
  • the top 16 has at the bottom 17 at its foremost end a flattening or chamfer 18.
  • the height H of the tool 8 thereby increases from the foremost tip 19 in the direction of the other end until a constant height H is reached.
  • the inwardly directed curvature of the tool 8 on its underside 17 generates a corresponding outwardly facing curvature at the cutting edge 12 of the respective indentation 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP17159213.2A 2016-05-03 2017-03-03 Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle Withdrawn EP3242039A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016207595.0A DE102016207595A1 (de) 2016-05-03 2016-05-03 Förderaggregat

Publications (1)

Publication Number Publication Date
EP3242039A1 true EP3242039A1 (fr) 2017-11-08

Family

ID=58228030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17159213.2A Withdrawn EP3242039A1 (fr) 2016-05-03 2017-03-03 Fixation d'un couvercle de pompe par des encoches formées dans une paroi de carter, lesdites encoches engageant un épaulement du couvercle

Country Status (2)

Country Link
EP (1) EP3242039A1 (fr)
DE (1) DE102016207595A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293288A (en) * 1979-02-05 1981-10-06 Weber Industries, Inc. Submersible pump housing
DE19528181A1 (de) 1995-08-01 1997-02-06 Bosch Gmbh Robert Peripheralpumpe, insbesondere zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeuges

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293288A (en) * 1979-02-05 1981-10-06 Weber Industries, Inc. Submersible pump housing
DE19528181A1 (de) 1995-08-01 1997-02-06 Bosch Gmbh Robert Peripheralpumpe, insbesondere zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeuges

Also Published As

Publication number Publication date
DE102016207595A1 (de) 2017-11-09

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