WO1999041504A1 - Förderaggregat für kraftstoff - Google Patents
Förderaggregat für kraftstoff Download PDFInfo
- Publication number
- WO1999041504A1 WO1999041504A1 PCT/DE1999/000343 DE9900343W WO9941504A1 WO 1999041504 A1 WO1999041504 A1 WO 1999041504A1 DE 9900343 W DE9900343 W DE 9900343W WO 9941504 A1 WO9941504 A1 WO 9941504A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delivery unit
- permanent magnet
- fuel delivery
- impeller
- unit according
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/048—Arrangements for driving regenerative pumps, i.e. side-channel 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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0646—Units comprising pumps and their driving means the pump being electrically driven the hollow pump or motor shaft being the conduit for the working fluid
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/278—Surface mounted magnets; Inset magnets
Definitions
- the invention relates to a fuel delivery unit of the type defined in the preamble of claim 1.
- a delivery unit of this type for delivering fuel from a fuel tank to an internal combustion engine of a motor vehicle (WO 95/25885)
- the delivery pump and the electric motor for driving it are arranged in a housing next to one another.
- the impeller which is equipped with vanes or impeller blades on its circumference, is non-rotatably seated on a shaft of the rotor or rotor, which carries a rotor or armature winding which is grooved and which rotates in a stator or stator covered with permanent magnet segments. Power is supplied to the armature winding via a one on the rotor shaft
- Commutator or commutator and two current brushes resting radially on the commutator under spring pressure.
- the fuel delivery unit according to the invention with the characterizing features of claim 1 has the advantage that by combining the rotating parts of the delivery unit, that is, the impeller of the feed pump and the rotor of the electric motor, to a single part a very - 2 -
- the conveyor unit can be made very flat, that is to say with an extremely small axial dimension.
- the increasing outside diameter of the conveyor unit in connection with the usual design of the conveyor unit is not only not a disadvantage, but also opens up the possibility for additional measures to improve the efficiency of the conveyor unit. Dispensing with the commutator and current brushes means that brush wear is eliminated, so that the service life of the conveyor unit is increased.
- the electric motor is designed as a DC motor, the necessary commutation of the current in the stator winding is carried out electronically.
- the cylindrical pump chamber is delimited by two radially extending, axially spaced side walls and a peripheral wall connecting the two side walls along their circular periphery.
- the impeller is opposite the side walls with a gap distance, and the inner surface of the stator formed by a grooved laminated core forms the peripheral wall of the pump chamber.
- the impeller has a plurality of axially open, spaced apart from one another in the circumferential direction
- Vane chambers delimiting radial impeller blades, which are interconnected by an outer ring.
- the permanent magnets are attached to the outer ring and are preferably made of plastic ferrites when the conveyor unit is made of plastic. - 3 -
- plastic-bonded rare earth magnets can be used, which are preferably embedded in the plastic matrix of the impeller.
- Sidewall of the pump chamber formed a groove-like side channel open to the pump chamber concentrically to the impeller axis with an interrupter web remaining between the side channel end and the side channel beginning, based on the flow direction.
- the beginning of the side channel of at least one side channel stands with a suction opening and the end of the side channel with one
- Drainage channels are present.
- Fig. 1 shows a longitudinal or meridialsch itt of the conveyor unit, the section in the upper half of the illustration by the trained - 4 -
- Fig. 2 is a plan view of an impeller from above
- Fig. 3 is a plan view of the impeller from Fig. 1
- Fig. 4 is an oblique section through the impeller 3 along the line
- the delivery unit shown schematically in FIG. 1 serves to deliver fuel from a reservoir to the internal combustion engine of a motor vehicle.
- the delivery unit is usually arranged in connection with a filter bowl as a so-called tank installation unit in the fuel tank or fuel tank of the motor vehicle.
- the delivery unit has a delivery pump 11 designed as a flow or side channel pump and an electric motor 12 driving the delivery pump 11.
- Feed pump 11 and electric motor 12 are accommodated in a common housing 13.
- the structure and operation of the feed pump 11 is known and described for example in DE 4020 521 AI.
- a pump chamber 14 is formed in the housing 13 and is delimited in the axial direction by two radially extending, axially spaced side walls 141, 142 and in the circumferential direction by a peripheral wall 143 connecting the two side walls 141, 142 along their circular periphery.
- a pump or impeller 16 is arranged in the pump chamber 14 and sits on a shaft 17 in a rotationally fixed manner.
- the shaft 17 is received with two shaft ends in two bearings 18, 19 which are formed in the two side walls 141, 142.
- the axis of the shaft 17 is colinear with the impeller axis 161 and the axis of the pump chamber 14.
- the impeller 16 has a large number of circumferentially spaced, radial impeller blades in 20, of which only two can be seen in the drawing.
- the impeller blades 20 are connected to one another by an outer ring 21.
- Two impeller blades 20 delimit between them a blade chamber 22 which is axially open.
- the impeller 16 lies opposite the side walls 141, 142 at a gap distance, and the outer ring 21 encloses a radial gap with the peripheral wall 143 of the pump chamber 14.
- each side wall 141, 142 of the pump chamber 14 a groove-like side channel 23 or 24 is formed, which is open towards the pump chamber 14 and is arranged concentrically to the impeller axis 161 and an interrupter web remains in the circumferential direction almost over 330 ° from the beginning of a side channel.
- the side channel start 231 and 241 of the side channels 23, 24 can be seen in the lower sectional view.
- the side channel end is offset by approximately 330 ° circumferential angle.
- Each side channel 23, 24 is connected via a radially aligned inflow channel 25 or 26 to a suction opening 27 of the delivery unit.
- the side channel ends of the two side channels 23, 24, which cannot be seen here, are each connected to a pressure port of the delivery unit via an outlet channel.
- the side channel ends of the two side channels 23, 24, which cannot be seen here, are each connected to a pressure port of the delivery unit via an outlet channel.
- only the side channel beginning 231 of the side channel 23 is connected to an inflow channel 25 and only the side channel end of the side channel 24 is connected to an outflow channel.
- the inflow channel 26 on the right in the sectional view is omitted, and the
- side channel 24 shows a cross section, as indicated by dashed lines in the drawing.
- the inflow channels 25, 26 can be arranged axially, but the radial alignment has the advantage of lower flow losses and can be easily implemented because of the relatively large outer diameter of the delivery unit.
- the electric motor 12 which is designed with a so-called internal pole rotor, has a stator 28 and a rotor 29 in a known manner, which is integrated into the impeller 16 of the feed pump 11 in order to achieve an extremely flat design of the feed unit. Its magnetic poles are formed by permanent magnet segments 30 which are fastened on the outer ring 21 of the impeller 16. In order to achieve a favorable magnetic inference, the outer ring 21 is preferably made of servo-magnetic material.
- the stator 28 is arranged as a grooved laminated core 31 coaxially to the impeller axis 161 in the housing 13 such that the inner ring surface of the laminated core 31 forms the peripheral wall 143 of the pump chamber 14.
- An armature winding 32 is usually arranged in the grooves of the laminated core 31, of which only the two end winding ends 321 and 322 and the two connecting lines 323 and 324 can be seen in the schematic drawing.
- the electric motor 12 is commutated electronically.
- the impeller 16 of the feed pump 11 is made of plastic, there is a manufacturing advantage if the permanent magnet segments 30 are made of plastic or are plastic-bonded rare earth magnets.
- FIG. 2 shows the impeller 16 from FIG. 1 in an oblique view from above.
- the impeller blades 20 from FIG. 1 are not shown here in this FIG. 2 in a depression 34 which runs in a circular shape around the impeller axis 161.
- cavities 36 arranged on a circumference 35 of the impeller 16 are shown.
- the cavities 36 in this impeller 16 extend over its entire thickness.
- Permanent magnets 37 are located in the cavities 36. These are preferably made from a hard ferrite magnet.
- the permanent magnets 37 are inserted in a positive manner in the cavities 36.
- a permanent magnet 37 has a conical shape. This is repeated as a negative in the design - 7 -
- the conical shape has the advantage that when the impeller 16 rotates, the centrifugal forces ensure that a clamping force is formed or strengthened between the permanent magnets 37 and the adjacent webs 38. In this way, the higher the rotational speed of the impeller 16, the more firmly the permanent magnets 37 are held.
- these can also have a different external shape, for example in the form of stair treads, a spherical or barrel-like section or else a cylinder section. The selected shape, however, in interaction with the webs 38, should be able to transfer the centrifugal force
- FIG. 3 shows the impeller 16 from FIG. 2 in a top view.
- the permanent magnets 37 can have a circumferential length Lu on the circumference 35 which is sufficient for sufficient acceleration due to the electromagnetic interaction forces with the stator.
- a radial length L R of the permanent magnet 37 is preferred, which is in a ratio of L U / L R between 0J5 and 3.5 with the circumferential length Lu. This has the advantage of avoiding demagnetizing effects between the permanent magnets 37.
- 3 shows three permanent magnets 37.1, 37.2, 37.3.
- a first permanent magnet 37.1 and a third permanent magnet 37.3 have the same pole orientation, while the second permanent magnet 37.2 lying between them has an opposite polarity. Due to the - 8th -
- the aim is to achieve a friction angle Reib R of 2 to 12 °.
- An angle of around 3 ° to 5 ° is preferred. This makes it possible to further increase the extremely high degree of utilization of the circumference 35 for the provision of the permanent magnets 37.
- the cone-like shape of the permanent magnets 37 enables them to hold in the cavities 36 according to a further development, without having to be glued there. This in turn saves one work step.
- the material which forms the cavities 36 is preferably chosen to be elastic or plastic, for example to set a slight press fit. A clamping force is then inevitably formed between the permanent magnets 37 and the dimensions of the cavities 36. Such a press fit also allows the permanent magnets 37 to be easily installed in the impeller 16 to form the rotor and the impeller 16 as an installation part.
- Fig. 4 shows the impeller 16 of Fig. 3 in a cross section along the
- FIG. 5 shows, based on FIG. 4, a second impeller with a stop 40. If, for example, the second impeller 39 is manufactured first, the permanent magnets 37 need only be inserted into the respective cavities up to the stop 40 in a subsequent step. This must of course be designed so that the formation of side channels, as shown in Fig. 1, is not hindered.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99913069A EP0974009A1 (de) | 1998-02-12 | 1999-02-09 | Förderaggregat für kraftstoff |
BR9904863-9A BR9904863A (pt) | 1998-02-12 | 1999-02-09 | Meio de transporte para combustìvel |
US09/402,069 US6220826B1 (en) | 1998-02-12 | 1999-02-09 | Fuel delivery unit |
JP54090099A JP2001522434A (ja) | 1998-02-12 | 1999-02-09 | 燃料のための搬送装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19805777A DE19805777A1 (de) | 1998-02-12 | 1998-02-12 | Förderaggregat für Kraftstoff |
DE19805777.6 | 1998-02-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999041504A1 true WO1999041504A1 (de) | 1999-08-19 |
Family
ID=7857526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/000343 WO1999041504A1 (de) | 1998-02-12 | 1999-02-09 | Förderaggregat für kraftstoff |
Country Status (6)
Country | Link |
---|---|
US (1) | US6220826B1 (de) |
EP (1) | EP0974009A1 (de) |
JP (1) | JP2001522434A (de) |
BR (1) | BR9904863A (de) |
DE (1) | DE19805777A1 (de) |
WO (1) | WO1999041504A1 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10026490A1 (de) * | 2000-05-27 | 2001-11-29 | Bosch Gmbh Robert | Förderaggregat für Kraftstoff |
DE10111837B4 (de) * | 2001-03-13 | 2005-09-29 | Robert Bosch Gmbh | Kraftstoffzumesssystem für eine Brennkraftmaschine mit einem Hochdruckpumpen (HDP)-Modul |
TW561226B (en) * | 2001-09-25 | 2003-11-11 | Matsushita Electric Ind Co Ltd | Ultra-thin pump and cooling system including the pump |
DE10356078A1 (de) * | 2003-12-01 | 2005-06-23 | Siemens Ag | Motor für eine Kraftstoffpumpe |
DE502005010177D1 (de) * | 2005-07-29 | 2010-10-14 | Siemens Ag | Permanentmagnetrotor für eine bürstenlose elektrische Maschine |
DE102009045028A1 (de) * | 2009-09-25 | 2011-03-31 | Robert Bosch Gmbh | Pumpe mit Elektromotor |
DE102013223818A1 (de) * | 2013-11-21 | 2015-05-21 | Robert Bosch Gmbh | Maschinenkomponente für eine elektrische Maschine |
EP4439933A1 (de) * | 2023-03-29 | 2024-10-02 | Wirthwein SE | Rotor |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2697986A (en) * | 1952-04-05 | 1954-12-28 | Jr James M Meagher | Axial flow glandless impeller pump |
US3500755A (en) * | 1968-05-17 | 1970-03-17 | Crane Co | Combined drag pump and electric motor |
EP0013157A1 (de) * | 1978-12-26 | 1980-07-09 | The Garrett Corporation | Permanentmagnetische Rotoren, insbesondere für dynamoelektrische Maschinen |
US4973872A (en) * | 1988-10-07 | 1990-11-27 | Emerson Electric Co. | Dynamoelectric machine rotor assembly with improved magnet retention stucture |
DE4020521A1 (de) | 1990-06-28 | 1992-01-02 | Bosch Gmbh Robert | Peripheralpumpe, insbesondere zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges |
WO1995025885A1 (de) | 1994-03-18 | 1995-09-28 | Robert Bosch Gmbh | Kraftstoffpumpe |
US5545017A (en) * | 1993-12-07 | 1996-08-13 | Robert Bosch Gmbh | Unit for delivering fuel from a supply tank to the internal combustion engine of a motor vehicle |
US5641276A (en) * | 1992-02-26 | 1997-06-24 | Magnet-Motor Gesellschaft Fur Magnetmotorische Technik Mbh | Electric pump for environmentally hazardous material |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3640657A1 (de) * | 1986-11-28 | 1988-06-09 | Heinz Turbanisch | Pumpe fuer fluessige medien |
US5112200A (en) * | 1990-05-29 | 1992-05-12 | Nu-Tech Industries, Inc. | Hydrodynamically suspended rotor axial flow blood pump |
US5659217A (en) * | 1995-02-10 | 1997-08-19 | Petersen; Christian C. | Permanent magnet d.c. motor having a radially-disposed working flux gap |
-
1998
- 1998-02-12 DE DE19805777A patent/DE19805777A1/de not_active Ceased
-
1999
- 1999-02-09 BR BR9904863-9A patent/BR9904863A/pt not_active IP Right Cessation
- 1999-02-09 WO PCT/DE1999/000343 patent/WO1999041504A1/de not_active Application Discontinuation
- 1999-02-09 EP EP99913069A patent/EP0974009A1/de not_active Withdrawn
- 1999-02-09 JP JP54090099A patent/JP2001522434A/ja active Pending
- 1999-02-09 US US09/402,069 patent/US6220826B1/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2697986A (en) * | 1952-04-05 | 1954-12-28 | Jr James M Meagher | Axial flow glandless impeller pump |
US3500755A (en) * | 1968-05-17 | 1970-03-17 | Crane Co | Combined drag pump and electric motor |
EP0013157A1 (de) * | 1978-12-26 | 1980-07-09 | The Garrett Corporation | Permanentmagnetische Rotoren, insbesondere für dynamoelektrische Maschinen |
US4973872A (en) * | 1988-10-07 | 1990-11-27 | Emerson Electric Co. | Dynamoelectric machine rotor assembly with improved magnet retention stucture |
DE4020521A1 (de) | 1990-06-28 | 1992-01-02 | Bosch Gmbh Robert | Peripheralpumpe, insbesondere zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges |
US5641276A (en) * | 1992-02-26 | 1997-06-24 | Magnet-Motor Gesellschaft Fur Magnetmotorische Technik Mbh | Electric pump for environmentally hazardous material |
US5545017A (en) * | 1993-12-07 | 1996-08-13 | Robert Bosch Gmbh | Unit for delivering fuel from a supply tank to the internal combustion engine of a motor vehicle |
WO1995025885A1 (de) | 1994-03-18 | 1995-09-28 | Robert Bosch Gmbh | Kraftstoffpumpe |
Also Published As
Publication number | Publication date |
---|---|
JP2001522434A (ja) | 2001-11-13 |
DE19805777A1 (de) | 1999-08-26 |
EP0974009A1 (de) | 2000-01-26 |
US6220826B1 (en) | 2001-04-24 |
BR9904863A (pt) | 2000-09-26 |
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