EP2148990B1 - Dispositif de transport - Google Patents

Dispositif de transport Download PDF

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Publication number
EP2148990B1
EP2148990B1 EP08735656A EP08735656A EP2148990B1 EP 2148990 B1 EP2148990 B1 EP 2148990B1 EP 08735656 A EP08735656 A EP 08735656A EP 08735656 A EP08735656 A EP 08735656A EP 2148990 B1 EP2148990 B1 EP 2148990B1
Authority
EP
European Patent Office
Prior art keywords
elevation
impeller
conveying
pump chamber
suction
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
EP08735656A
Other languages
German (de)
English (en)
Other versions
EP2148990A1 (fr
Inventor
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 EP2148990A1 publication Critical patent/EP2148990A1/fr
Application granted granted Critical
Publication of EP2148990B1 publication Critical patent/EP2148990B1/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
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings

Definitions

  • the invention relates to a winning order according to the preamble of the main claim.
  • a plurality of elevations are provided radially within its delivery channel, which set a predetermined axial gap between the end wall and the impeller and act as a bearing of the impeller.
  • the impeller is aligned parallel to the end walls. This parallel alignment of the impeller in the pump chamber can only be achieved by a very precise shaping of the lid of the pump chamber, so that the production costs are relatively high.
  • a delivery unit which has a degassing opening in the interruption area.
  • DE 42 43 544 A1 It is known to provide recesses in the radial direction inside the delivery channel and in the interruption region, which form a labyrinth seal.
  • US 4,715,777 A discloses all the features of the preamble of claim 1, a Forderaggregat is known, which provides an increase in the form of a projection in the interruption area.
  • the redesignagregat invention with the characterizing features of the main claim has the advantage that a simple storage of the impeller is achieved by in the Interrupt area is provided at least one increase. In this way, a very stable, constant axial position of the impeller in the pump chamber sets.
  • the elevation is lenticular, hump-shaped or hill-shaped, since these forms are particularly effective and easy to manufacture.
  • the elevation has a height of between 5 ⁇ m and 50 ⁇ m, in particular between 10 ⁇ m and 15 ⁇ m, since in this way optimum efficiency of the delivery unit is achieved.
  • the one end wall is formed on a suction cover and the other end wall on a pressure cover, wherein the two covers enclose the pump chamber, since the pump chamber is particularly easy to produce in this way.
  • the suction cover and / or the pressure lid is made of plastic, since the lid are thereby produced by injection molding.
  • the increase can be particularly easy to manufacture with the injection molding, without additional post-processing and with low tolerance requirements. But other materials would be conceivable in which the pump cover can be produced without forming and post-processing effort.
  • Fig.1 shows a delivery unit, in which the invention could find application.
  • the delivery unit serves to convey liquid, for example fuel, from a storage container to a consumer, for example an internal combustion engine.
  • the delivery unit may be both a flow pump or as well as a positive displacement pump.
  • the delivery unit has a pump housing 1 with at least one input channel 2 and an output channel 3.
  • the input channel 2 of the delivery unit is connected for example via a suction line 4 to a reservoir 5, in which, for example, fuel is stored.
  • the output channel 3 is connected via a pressure line 8, for example with an internal combustion engine 9.
  • the pump housing 1 has a pump chamber 10, in which a rotor 11 rotates about a pump axis 12 in a rotating manner.
  • the pump chamber 10 is delimited by two end walls 17, 18 lying opposite one another in the direction of the pump axis 12, and by a circumferential wall 19 in the radial direction with respect to the pump axis 8.
  • the rotor 11 serves to convey liquid and builds up a predetermined pressure downstream of the pump chamber 10.
  • the rotor 11 is designed as a turbine runner and is driven via a drive shaft 15 by an actuator 16, for example an electric motor.
  • the rotor 11 and the drive shaft 15 are positively connected to each other by the rotor 11 has a driving opening 22, in which the drive shaft 15 protrudes positively.
  • the positive connection results, for example, in that the drive shaft 15 has at least one flattening 23 on its end section facing the rotor 11, which in each case interacts in a form-fitting manner with a driver section 24 of the driver opening 22.
  • the rotor 11 is mounted on the drive shaft 15, for example, such that it is axially movable between the end walls 17,18.
  • the impeller 11 has conveying blades 27 which cooperate with at least one delivery channel 28 of the pump chamber 10 in a known manner, so that adjusts a delivery with pressure build-up.
  • the impeller 11 at both end faces a ring of conveying blades 27, which are formed closed radially outward.
  • the conveyor blades 27 may also be provided only on one side and / or be designed to be open radially outward.
  • Each ring of conveying blades 27 is associated with a delivery channel 28 in the pump chamber 10.
  • each a delivery channel 28 is provided which is arranged in each case at approximately the same radial distance from the pump axis 12 as the associated ring of conveying blades 27th
  • the end wall 17 is formed on a suction cover 29 and the end wall 18 on a pressure cover 30, wherein the two covers 29,30 include the pump chamber 10.
  • the suction cover 29 has the input channel 2, which opens into the delivery channel 28 of the suction cover 29.
  • the pressure cover 30 faces the actuator 16 and also has a delivery channel 28, which is flow-connected to the output channel 3 via a pump chamber outlet 31.
  • Fig.2 shows a sectional view of the pump chamber 14 along the line II-II in Fig.1 in the direction of the suction cover.
  • the at least one delivery channel 28 of the suction cover 29 and / or pressure cover 30 is arranged in each case in a circle around the pump axis 12, wherein the circular segment formed by the delivery channel 28 is not closed and the radius of the delivery channel is approximately constant.
  • the suction side End of the conveying channel 28 is thereby spaced from its pressure-side end in the circumferential direction of the conveying channel 28, so that between the suction-side end and the pressure-side end, an interruption region 34 is formed.
  • the inlet channel 2 opens into the suction-side end of the conveying channel 28 of the suction cover 29 and the pump chamber outlet 31 into the pressure-side end of the conveying channel 28 of the pressure lid 30.
  • At least one elevation 35 is provided in the interruption region 34 of the suction cover 29 or the pressure cover 30, which elevation is increased or elevated relative to the associated end wall 17, 18.
  • the elevation 35 is rounded and, for example, lenticular, hump-shaped or hill-shaped. Considering the elevation 35 in the axial direction with respect to the pump axis 12, the elevation 35 has, for example, a circular, oval, rectangular, square, polygonal or any other shape.
  • the elevation 35 has, for example, a height H between 5 ⁇ m and 50 ⁇ m, preferably between 10 ⁇ m and 15 ⁇ m.
  • the increase 35 according to the invention is provided exclusively on one of the two covers 29, 30, according to the exemplary embodiment on the suction cover 29.
  • the at least one elevation 35 is arranged such that an oblique position of the impeller 11 with respect to the pump axis 12 or the relevant end wall 17, 18 results.
  • a hydrodynamic bearing of the axially movable impeller 11 is achieved, so that automatically sets a predetermined axial position of the impeller 11 in the pump chamber 10 during operation of the originallyagregates.
  • liquid is drawn into the axial gap between the impeller 11 and the elevation 35, so that a liquid cushion is formed, which reduces the friction between the solids.
  • the effect of the increase 35 as hydrodynamic bearing is improved by the inclination of the impeller 11, since in this way a wedge-shaped fluid cushion is formed.
  • the suction cover 29 and / or the pressure cover 30 are made for example of plastic by means of an injection molding process, whereby the increase 35 according to the invention can be produced very easily and inexpensively.
  • the demands on the manufacturing tolerances are very low.
  • Figure 3 shows a sectional view of the elevation 35 along the line III-III in Fig.2 ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Discharge By Other Means (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)

Claims (8)

  1. Dispositif de transport comprenant une chambre de pompe, dans laquelle est montée à rotation une roue mobile qui présente des aubes de transport, qui coopèrent avec au moins un canal de transport prévu dans la chambre de pompe, qui s'étend depuis une extrémité côté aspiration jusqu'à une extrémité côté pression, et qui est disposé en forme de cercle, l'extrémité côté pression étant espacée par rapport à l'extrémité côté aspiration dans la direction périphérique par rapport au canal de transport de telle sorte qu'entre l'extrémité côté aspiration et l'extrémité côté pression soit formée une région d'interruption, caractérisé en ce que dans la région d'interruption (34) est prévu au moins un rehaussement (35), la chambre de pompe (10) étant limitée dans la direction axiale par rapport à un axe de pompe (12) par deux parois frontales (17, 18), dans lesquelles est réalisé l'au moins un canal de transport (28), le rehaussement (35) étant rehaussé par rapport à la paroi frontale (17, 18), le rehaussement (35) étant disposé de telle sorte que l'on obtienne une position oblique de la roue mobile (11) par rapport à l'axe de la pompe (12) ou à la paroi frontale (17, 18).
  2. Dispositif de transport selon la revendication 1, caractérisé en ce que le rehaussement (35) est arrondi.
  3. Dispositif de transport selon la revendication 1, caractérisé en ce que le rehaussement (35) est en forme de lentille, de renflement, ou de saillie.
  4. Dispositif de transport selon la revendication 1, caractérisé en ce que le rehaussement (35) présente une hauteur comprise entre 5 µm et 50 µm.
  5. Dispositif de transport selon la revendication 1, caractérisé en ce que le rehaussement (35) présente une hauteur comprise entre 10 µm et 15 µm.
  6. Dispositif de transport selon la revendication 1, caractérisé en ce que l'une des parois frontales (17) est réalisée sur un couvercle d'aspiration (29) et l'autre paroi frontale (18) sur un couvercle de pression (30), les deux couvercles (29, 30) renfermant la chambre de pompe (10).
  7. Dispositif de transport selon la revendication 6, caractérisé en ce que le rehaussement (35) est réalisé exclusivement dans la région d'interruption (34) du couvercle d'aspiration (29) ou du couvercle de pression (30).
  8. Dispositif de transport selon la revendication 1, caractérisé en ce que le couvercle d'aspiration (29) et/ou le couvercle de pression (30) sont fabriqués en plastique.
EP08735656A 2007-04-20 2008-04-01 Dispositif de transport Not-in-force EP2148990B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007018820A DE102007018820A1 (de) 2007-04-20 2007-04-20 Förderaggregat
PCT/EP2008/053884 WO2008128858A1 (fr) 2007-04-20 2008-04-01 Dispositif de transport

Publications (2)

Publication Number Publication Date
EP2148990A1 EP2148990A1 (fr) 2010-02-03
EP2148990B1 true EP2148990B1 (fr) 2011-08-31

Family

ID=39471888

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08735656A Not-in-force EP2148990B1 (fr) 2007-04-20 2008-04-01 Dispositif de transport

Country Status (7)

Country Link
EP (1) EP2148990B1 (fr)
CN (1) CN101668952B (fr)
AT (1) ATE522724T1 (fr)
BR (1) BRPI0806102A2 (fr)
DE (1) DE102007018820A1 (fr)
RU (1) RU2458252C2 (fr)
WO (1) WO2008128858A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD142817A3 (de) * 1978-12-19 1980-07-16 Lothar Wagner Mehrstufige seitenkanalpumpe
US4715777A (en) * 1985-09-18 1987-12-29 Walbro Corporation Lateral channel supply pump
JP3107438B2 (ja) * 1992-01-14 2000-11-06 三菱電機株式会社 電動燃料ポンプ
US5248223A (en) * 1992-06-09 1993-09-28 Walbro Corporation Fuel pump with anti-reversion inlet
DE4243544C2 (de) 1992-12-22 2003-04-17 Bosch Gmbh Robert Kraftstofförderpumpe
DE4343078B4 (de) 1993-12-16 2007-09-13 Robert Bosch Gmbh Aggregat zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine
DE19634900A1 (de) * 1996-08-29 1998-03-05 Bosch Gmbh Robert Strömungspumpe
RU9267U1 (ru) * 1998-09-09 1999-02-16 Лепеха Анатолий Иванович Многоступенчатая роторно-вихревая машина
DE102004005224A1 (de) * 2004-02-03 2005-08-18 Robert Bosch Gmbh Förderaggregat

Also Published As

Publication number Publication date
DE102007018820A1 (de) 2008-10-23
WO2008128858A1 (fr) 2008-10-30
BRPI0806102A2 (pt) 2011-08-30
RU2009142691A (ru) 2011-06-10
ATE522724T1 (de) 2011-09-15
CN101668952A (zh) 2010-03-10
CN101668952B (zh) 2012-11-28
EP2148990A1 (fr) 2010-02-03
RU2458252C2 (ru) 2012-08-10

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