EP0774077B2 - Pompe a circulation destinee a amener du carburant d'un reservoir au moteur a combustion interne d'un vehicule - Google Patents

Pompe a circulation destinee a amener du carburant d'un reservoir au moteur a combustion interne d'un vehicule Download PDF

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Publication number
EP0774077B2
EP0774077B2 EP96900265A EP96900265A EP0774077B2 EP 0774077 B2 EP0774077 B2 EP 0774077B2 EP 96900265 A EP96900265 A EP 96900265A EP 96900265 A EP96900265 A EP 96900265A EP 0774077 B2 EP0774077 B2 EP 0774077B2
Authority
EP
European Patent Office
Prior art keywords
impeller
rotation
blades
axis
flow pump
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
EP96900265A
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German (de)
English (en)
Other versions
EP0774077A1 (fr
EP0774077B1 (fr
Inventor
Klaus Dobler
Michael Huebel
Willi Strohl
Jochen Rose
Bernhard Blaettel
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
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Filing date
Publication date
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Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0774077A1 publication Critical patent/EP0774077A1/fr
Publication of EP0774077B1 publication Critical patent/EP0774077B1/fr
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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
    • F04D5/00—Pumps with circumferential or transverse flow
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/188—Rotors specially for regenerative pumps

Definitions

  • the invention relates to a flow pump for conveying fuel from a reservoir to the internal combustion engine of a motor vehicle according to the preamble of claim 1.
  • Such a flow pump is known from WO-A-92 00457.
  • This flow pump has a circulating in a pump chamber impeller, which has at least one axially directed end face a ring of circumferentially spaced-apart wings.
  • the impeller with the vane ring cooperates with an annular conveying channel for conveying the fuel.
  • the vanes when viewed in the radial direction with respect to the axis of rotation of the impeller, are arranged parallel to the axis of rotation of the impeller. Due to this arrangement of the wings no optimal delivery pressure and efficiency is achieved in the known flow pump.
  • a flow pump in which the impeller circulating in a pump chamber has at its end faces rings of vanes which cooperate with an annular conveying channel for conveying a medium.
  • the wings of the impeller are inclined in radial observation with respect to the axis of rotation of the impeller with respect to the axis of rotation such that they lead to the end face of the impeller out in the direction of rotation of the impeller. Due to this design of the impeller blades of the delivery pressure and the efficiency of the flow pump is improved, but still not optimal.
  • a flow pump is also known, in which the impeller circulating in a pump chamber has on its end faces rings of wings which cooperate with an annular conveying channel for conveying a medium.
  • the wings of the impeller are inclined in radial observation with respect to the axis of rotation of the impeller with respect to the axis of rotation such that they lead to the end face of the impeller out in the direction of rotation of the impeller.
  • a flow pump is known in which the wings of the impeller are radially inclined with respect to the axis of rotation of the impeller with respect to the axis of rotation inclined so that they lead to the front side of the impeller out in the direction of rotation of the impeller.
  • the wings rush with their radially outer ends opposite to their radial inner ends in the direction of rotation of the impeller ahead. Due to this arrangement of the wings an improved, but still no optimal delivery pressure and efficiency is achieved.
  • the flow pump according to the invention with the features of claim 1 has the advantage that are further improved by the formation of the wings with the starting from the radially inner ends to the radially outer ends toward increasing angle of delivery pressure and efficiency.
  • FIG. 1 shows a flow pump for conveying fuel from a reservoir to the internal combustion engine of a motor vehicle in a simplified representation
  • Figure 2 shows an enlarged view of a designated II in Figure 1 section II of the flow pump according to a first embodiment form
  • Figure 3 shows the impeller of the flow pump of FIG 2 in a cross section perpendicular to its axis of rotation
  • Figure 4 the impeller of the flow pump in a section along line IV-IV in Figure 3
  • Figure 6 the impeller 7 shows the impeller of the flow pump in a section along line VII-VII in Figure 6
  • Figure 8 shows the impeller of the flow pump according to a first embodiment in a side view in the direction of its axis of rotation considered
  • Figure 9 the Impeller in a section along line IX-IX in Figure 8
  • Figure 10 shows a modified embodiment of the impeller according to a second embodiment.
  • FIGS. 1-7 do not represent any embodiments of the invention.
  • FIG. 1 shows, in a simplified representation, an aggregate 10 which, in a common housing 12, comprises a flow pump 14 and a drive motor 15 for the flow pump 14.
  • the unit 10 is in a fuel tank 16 of a Motor vehicle arranged and the flow pump 14 sucks during operation of the unit 10 fuel from the reservoir 16 and promotes this via a pressure line 17 to the engine 18 of the motor vehicle.
  • the flow pump 14 has an impeller 22 rotating in a pump chamber 20, wherein the pump chamber 20 is limited in the direction of the axis of rotation 24 of the impeller 22 by a respective chamber wall 25,26.
  • the flow pump 14 is shown in fragmentary manner according to a first embodiment with reference to which the structure is explained as a so-called peripheral side channel pump.
  • the impeller 22 has at its two axially, that is, in the direction of its axis of rotation 24 directed end faces 28,29 each have a ring of in the circumferential direction of the impeller 22 at a distance from each other arranged wings 30. Between the wings 30 each groove-like spaces 31 are present and the wings 30 are formed substantially flat. The reason of the groove-like intermediate spaces 31 is formed rounded in the longitudinal axes containing the axis of rotation 24 viewed through the impeller 22, for example in the form of a circular section.
  • the wings 30 extend in the radial direction with respect to the axis of rotation 24 of the impeller 22 from a radially inner end 30a to a radially outer end 30b on the outer periphery of the impeller 22. In the direction of the axis of rotation 24 of the impeller 22, the wings 30 extend from one the wing rings of the two end faces 28,29 approximately in the middle of the axial width of the impeller 22 from each other separating web 33 to the end faces 28,29 of the impeller 22nd
  • the vanes of the impeller 22 cooperate with an annular conveying passage 34 formed in the pumping chamber 20 for conveying fuel.
  • the delivery channel 34 open at the beginning of a suction port 35 and at the end of a pressure port 36.
  • the fuel to be delivered flows through the Suction opening 35 in the delivery channel 34 and flows out of this under increased pressure through the pressure port 36 from.
  • the delivery channel 34 extends in the radial direction with respect to the axis of rotation 24 of the impeller 22 from the radially inner ends 30a of the vanes 30 to beyond the radially outer ends 30b thereof. In the direction of the axis of rotation 24 of the impeller 22, the delivery channel 34 extends beyond the end faces 28,29 of the impeller 22 also.
  • the delivery channel 34 is thus arranged in the direction of the axis of rotation 24 of the impeller 22 laterally adjacent to the wings 30 and also extends beyond the outer periphery of the impeller 22nd
  • the wings 30 are, as is clear in Figure 4, arranged obliquely so that they, starting from the web 33 to the respective end face 28,29 out, where the wings 30 end, in the direction of rotation 21 of the impeller 22 ahead. This means that the wings 30 are not arranged parallel to the axis of rotation 24 of the impeller 22, ie at right angles to the respective end face 28,29, but with the axis of rotation 24 a directed in the direction of rotation 21 of the impeller 22 angle ⁇ include.
  • the angle ⁇ is between 25 ° and 60 °, preferably between 30 ° and 55 °.
  • the flow pump 14 is shown according to a second embodiment, based on which the structure is explained as a so-called side channel pump.
  • the impeller 122 has in each case at its two axially directed end faces 128,129 on a ring of circumferentially of the impeller 122 spaced-apart wings 130, between which each groove-like spaces 131 are present.
  • the vanes 130 of the two end faces 128, 129 of the impeller 122 are separated from one another by a web 133 in the direction of the axis of rotation 24 of the impeller 122 and are interconnected at their radially outer ends 130b by a closed ring 140.
  • the web 133 may be formed continuously in the radial direction with respect to the axis of rotation 24 of the impeller 122, so that the two end faces 128,129 of the impeller 122 are completely separated from each other, or the web 133 may end in the radial direction in front of the ring 140, so that between web 133 and ring 140 in the region of the intermediate spaces 131 each have an opening 142 remains, through which the two end faces 128,129 of the impeller 122 communicate with each other.
  • each annular conveying channel 144 and 145 is formed, wherein the conveying channels 144,145 the respective rim of the wings 130 in the end faces 128,129 of the impeller 122 are formed opposite.
  • the one delivery channel 144 opens at the beginning of the suction port 135 and in the other delivery channel 145 opens at the end of the pressure port 136.
  • the two delivery channels 144,145 have over the outer periphery of the impeller 122, that is on the outer periphery of the ring 140 no connection with each other ,
  • the wings 130 are arranged obliquely as described in the first embodiment according to FIG 7, that these, starting from the web 133 to the respective end face 128,129 toward which the wings 130 end, in the direction of rotation 21 of the impeller 122 ahead.
  • This means that the wings 130 are not parallel are arranged to the rotational axis 24 of the impeller 122, but with the axis of rotation 24 a directed in the direction of rotation 21 of the impeller 122 angle ⁇ include.
  • the angle ⁇ is between 25 ° and 60 °, preferably between 30 ° and 55 °.
  • the impeller 222 of the flow pump 14 is a first one. Embodiment shown.
  • the flow pump 14 is formed here as in the second embodiment as a side channel pump and there are two apparent in Figure 5 delivery channels, each of the vane ring of one end face of the impeller 222 cooperates with a delivery channel.
  • the impeller 222 has at its two axially directed end faces 228,229 each a ring of circumferentially spaced-apart wings 230, between which each groove-like spaces 231 are present, the reason rounded, for example in the form of a circular section is formed.
  • the wings 230 are connected together at their radially outer ends 230b via a ring 240.
  • the edges 232 of the wings 230, with which they end at the respective end face 228,229 of the impeller, are not arranged radially with respect to the axis of rotation 24 of the impeller 222, but the edges 232 rush to the radially outer Ends 230 b of the wings 230 against their arrangement at the radially inner ends 230 a of the wings 230 in the direction of rotation 21 of the impeller 222 ahead.
  • the edges 232 of the wings 230 at the respective end face 228,229 of the impeller 222 extend from the radially inner ends 230a of the wings 230 to the radially outer ends 230b of the wings 230 rectilinearly.
  • the edges 232 are inclined at an angle ⁇ in the direction of rotation 21 of the impeller 222.
  • the angle ⁇ is between 20 ° and 45 °, preferably between 25 ° and 40 °.
  • the wings 230 are also arranged inclined so that they start in the direction of rotation starting from the web 233 separating the wings 230 of the two end faces 228, 229 from the respective end face 228, 229 at which the wings 230 terminate 21 of the impeller 222 ahead.
  • the wings 230 are not arranged parallel to the axis of rotation 24 of the impeller 222, but include with the axis of rotation 24 a directed in the direction of rotation 21 of the impeller 222 angle ⁇ .
  • the angle ⁇ is not constant over the course of the wings 230, starting from its radially inner end 230a to its radially outer end 230b.
  • the wings 230 form at the respective end face 228, 229 of the impeller 222 with the axis of rotation 24 an angle ⁇ E directed in the circumferential direction 21 of the impeller 222, between 25 ° and 50 °, in particular between 30 ° and 45 ° is.
  • the angle ⁇ E is about 37 °.
  • the wings 230 form on the respective end face 228, 229 of the impeller 222 with the axis of rotation 24 an angle ⁇ A directed in the direction of rotation 21 of the impeller 222, which is between 45 ° and 70 °, in particular between 54 ° and 65 ° °.
  • the angle ⁇ A is about 60 °.
  • the angle ⁇ increases linearly from the radially inner ends 230a of the wings 230 towards their radially outer ends 230b. Due to this increase in the angle ⁇ , starting from the radially inner ends 230a of the wings 230 to the radially outer ends 230b, the above-described in the direction of rotation 21 of the impeller 222 by the angle ⁇ vorgeneddle arrangement of the edges 232 of the wings 230 results in the area of their am Web arranged 233 inner ends of the wings 230 in cross-section perpendicular to the axis of rotation 24 of the impeller 222 viewed approximately radially with respect to the axis of rotation 24, so are not inclined as at its lying on the front edge 232.
  • the delivery pressure and the efficiency of the flow pump are further increased.
  • FIG. 10 shows a side view of a second exemplary embodiment as a variant of the impeller 322 of the flow pump according to the first exemplary embodiment.
  • the impeller 322 is substantially the same design as in the first embodiment, however, the edge 332, with the end of the blades 330 at the end face of the impeller 322, not straight but curved.
  • the edge 332 is arranged approximately radially with respect to the rotational axis 24 of the impeller 322 and the edge 332 extends to the radially outer ends 330b of the blades 330 continuously increasing in the direction of rotation 21 of the impeller 322.
  • the Angle ⁇ of the blades 330 with the axis of rotation 24 of the impeller 322 include starting from the radially inner ends 330 a of the blades 330 to their radially outer ends 330 b larger.
  • the increase in the size of the angle ⁇ is not linear as in the first embodiment but increases toward the radially outer ends 330 b of the wings 330 out.

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

Claims (7)

  1. Pompe à circulation pour transférer du carburant dans un réservoir (16) d'un moteur à combustion interne (18) d'un véhicule automobile, dans laquelle,
    - un rotor (322, 22) tournant dans une chambre de pompe (20), et ayant au moins sur une face frontale (228, 229) dirigée axialement, comporte une couronne d'ailettes (230, 330) écartées dans la direction périphérique, et coopérant avec un canal de transfert annulaire (34, 144, 145) pour transférer le carburant,
    - vues dans la direction radiale par rapport à l'axe de rotation (24) du rotor (222, 322) les ailettes (230, 330) sont inclinées par rapport à l'axe de rotation (24) pour que par rapport à au moins une face frontale dirigée axialement (228, 229) du rotor (222, 322) elles soient en avance dans la direction de circulation (21) du rotor (222, 322), et
    - sur au moins une face frontale dirigée axialement (228, 229) du rotor (222, 322), les ailettes (230, 330) ont leur extrémité radialement extérieure (230b, 330b) en avance par rapport à leur extrémité radialement intérieure (230a, 330a) dans la direction de circulation (21) du rotor (222, 322),
    caractérisée en ce que
    l'angle (α) d'inclinaison des ailettes (230, 330) par rapport à l'axe de rotation (24) du rotor (222, 322) augmente à partir de l'extrémité radiale intérieure (230a, 330a) des ailettes (230, 330) vers leur extrémité radiale extérieure (230b, 330b).
  2. Pompe à circulation selon la revendication 1,
    caractérisée en ce que
    les ailettes (230) forment avec l'axe de rotation (24) du rotor, (222) un angle (α) dirigé dans la direction de circulation (21) du rotor (222), compris entre 25° et 70°.
  3. Pompe à circulation selon la revendication 1,
    caractérisée en ce que
    les ailettes (230, 330) sur au moins une face frontale dirigée axialement (228, 229) du rotor (222, 322), partant de leur extrémité radiale intérieure (230a, 330a) sont inclinées par rapport à une disposition radiale théorique (250), dans la direction de circulation (21); d'un angle (β) compris entre 20° et 45°.
  4. Pompe à circulation selon la revendication 1,
    caractérisée en ce que
    dans la zone de leur extrémité radiale intérieure (230a, 330a), les ailettes (230, 330) sont inclinées d'un angle (αE) par rapport à l'axe de rotation (24) du rotor (222, 322), compris entre 25° et 50°, et
    dans la zone de leur extrémité radiale extérieure (230b, 330b) les ailettes (230, 330) sont inclinées d'un angle (αA) par rapport à l'axe de rotation (24) du rotor (222, 322), compris entre 45° et 70°.
  5. Pompe à circulation selon l'une des revendications 1 ou 4,
    caractérisée en ce que
    les ailettes (330) sont courbées à partir de leur extrémité radiale intérieure (330a) vers leur extrémité radiale extérieure (330b) dans la direction de circulation (21) du rotor (322).
  6. Pompe à circulation selon la revendication 5,
    caractérisée en ce que
    les ailettes (330) sont sensiblement radiales par rapport à l'axe de rotation (24) du rotor (322) dans la zone de leur extrémité radialement intérieure (330a).
  7. Pompe à circulation selon l'une des revendications précédentes,
    caractérisée en ce que
    - les extrémités radiales extérieures (230b, 330b) des ailettes (230, 330) sont reliées par un anneau fermé (240), et
    - le canal de transfert annulaire (145, 146) est réalisé dans une paroi (125, 126) qui délimite la chambre de pompe (20) dans la direction de l'axe de rotation (24) du rotor (222, 322) et ce canal s'étend dans la direction radialement par rapport à l'axe de rotation (24) entre l'extrémité radialement intérieure (230a, 330a) et l'extrémité radialement extérieure (230b, 330b) des ailettes (230, 330).
EP96900265A 1995-02-08 1996-01-10 Pompe a circulation destinee a amener du carburant d'un reservoir au moteur a combustion interne d'un vehicule Expired - Lifetime EP0774077B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19504079A DE19504079B4 (de) 1995-02-08 1995-02-08 Strömungspumpe zum Fördern von Kraftstoff aus einem Vorratsbehälter zur Brennkraftmaschine eines Kraftfahrzeugs
DE19504079 1995-02-08
PCT/DE1996/000024 WO1996024769A1 (fr) 1995-02-08 1996-01-10 Pompe a circulation destinee a amener du carburant d'un reservoir au moteur a combustion interne d'un vehicule

Publications (3)

Publication Number Publication Date
EP0774077A1 EP0774077A1 (fr) 1997-05-21
EP0774077B1 EP0774077B1 (fr) 2000-08-23
EP0774077B2 true EP0774077B2 (fr) 2006-04-05

Family

ID=7753421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900265A Expired - Lifetime EP0774077B2 (fr) 1995-02-08 1996-01-10 Pompe a circulation destinee a amener du carburant d'un reservoir au moteur a combustion interne d'un vehicule

Country Status (8)

Country Link
US (1) US5807068A (fr)
EP (1) EP0774077B2 (fr)
JP (1) JPH09511812A (fr)
KR (1) KR100382681B1 (fr)
CN (1) CN1071420C (fr)
BR (1) BR9605117A (fr)
DE (2) DE19504079B4 (fr)
WO (1) WO1996024769A1 (fr)

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Also Published As

Publication number Publication date
EP0774077A1 (fr) 1997-05-21
CN1145659A (zh) 1997-03-19
JPH09511812A (ja) 1997-11-25
CN1071420C (zh) 2001-09-19
EP0774077B1 (fr) 2000-08-23
DE19504079A1 (de) 1996-08-14
DE19504079B4 (de) 2004-11-04
BR9605117A (pt) 1997-10-07
KR100382681B1 (ko) 2003-08-21
US5807068A (en) 1998-09-15
DE59605787D1 (de) 2000-09-28
WO1996024769A1 (fr) 1996-08-15
KR970702436A (ko) 1997-05-13

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