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WO2012038213A2 - Pompe à moteur électrique - Google Patents

Pompe à moteur électrique Download PDF

Info

Publication number
WO2012038213A2
WO2012038213A2 PCT/EP2011/064998 EP2011064998W WO2012038213A2 WO 2012038213 A2 WO2012038213 A2 WO 2012038213A2 EP 2011064998 W EP2011064998 W EP 2011064998W WO 2012038213 A2 WO2012038213 A2 WO 2012038213A2
Authority
WO
WIPO (PCT)
Prior art keywords
pump
permanent magnets
rotor
electric motor
fluid
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.)
Ceased
Application number
PCT/EP2011/064998
Other languages
German (de)
English (en)
Other versions
WO2012038213A3 (fr
Inventor
Alexander Fuchs
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 WO2012038213A2 publication Critical patent/WO2012038213A2/fr
Publication of WO2012038213A3 publication Critical patent/WO2012038213A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to a pump with an electric motor according to the
  • the preamble of claim 1 a method of manufacturing a pump with electric motor according to the preamble of claim 1 1 and a
  • fuel pumps are used to deliver fuel to an internal combustion engine.
  • Electric motor of the pump includes a stator and a rotor with
  • Receiving unit at least one arranged on the receiving unit Bulge has.
  • the bulge is formed in particular as a groove and the magnetic unit is a permanent magnet.
  • Pump according to the invention with electric motor in particular for a motor vehicle, for conveying a fluid, comprising an impeller with conveying elements, of which a rotational movement about a rotation axis is executable, an existing on the impeller working space, an electric motor with a stator and a rotor, wherein the rotor is provided with permanent magnets, a
  • the impeller are arranged with the conveying elements and the electric motor within the housing and preferably the pump is integrated in the electric motor or vice versa, by the rotor is formed by the impeller, wherein the permanent magnets on the rotor are completely enclosed by an encapsulation fluid-tight and / or the permanent magnets made of a fuel-resistant material, for. B. SmCo, are constructed.
  • the permanent magnets on the rotor are completely enclosed by the encapsulation, so that thereby the permanent magnets are fluid-tight of the fluid to be delivered, in particular fuel, for. As diesel or gasoline, are separated. As a result, no fuel can get to the permanent magnets and the
  • Permanent magnets could be made of a material with strong magnetic
  • NdFeB neodymium, iron, boron
  • Permanent magnets with strong magnetic properties are used for a sufficient power of the pump with electric motor and it can be promoted as fluids to be pumped fluid and thereby take the permanent magnets in the operation of the pump with electric motor no harm.
  • the thickness of the encapsulation is at least 70%, 50%, 30%, 20%, 10%, 5%, 3%, 2% or 1% of the maximum Expansion of the permanent magnets.
  • the encapsulation thereby does not constitute a coating with a very thin layer thickness.
  • the encapsulation is not a coating of nickel or a nickel-copper-nickel alloy. Due to the greater thickness of the encapsulation can thus the
  • Permanent magnet are permanently protected from the fluid to be delivered.
  • the permanent magnets are arranged in recesses, in particular in blind holes or in through holes, of the rotor.
  • the permanent magnets are enclosed with adhesive as encapsulation, and preferably the permanent magnets are glued to the rotor with the adhesive.
  • the permanent magnets are on the rotor in z. B. positively and / or non-positively and / or materially attached.
  • the adhesive can also in addition to the encapsulation of the
  • Permanent magnets are used, so that the adhesive has two functions, namely the establishment of a connection or fixation between the
  • Permanent magnet and the rotor and the function of the encapsulation of the permanent magnets and the associated shielding with respect to the fluid to be delivered takes over.
  • the permanent magnets are enclosed with a plastic encapsulation as encapsulation.
  • the permanent magnets with the encapsulation are fixed non-positively on the rotor.
  • the permanent magnets with the encapsulation are positively secured to the rotor.
  • the encapsulation has at least one form fit geometry, for. As a locking lug or a nipple with hole, and the rotor has at least one Gegenform gleichgeometrie, z. As a catch for latching the locking lug or a rod for insertion into the bore of the nipple, so that thereby the permanent magnets
  • the encapsulation is at least partially formed by the rotor.
  • the encapsulation consists at least partially, in particular completely, of metal.
  • the permanent magnets in the recesses in particular in the blind holes or through holes, arranged and the recesses are fluid-tightly closed by at least one lid, in particular the blind holes are each from a lid or the through holes are each fluid-tightly sealed by two covers, in particular by the Lid welded to the rotor.
  • the lid made of metal and
  • the lids are welded fluid-tight with the rotor.
  • Recesses which are each closed by at least one lid, additionally surrounded by a plastic encapsulation or materially secured by adhesive to the rotor.
  • Inventive method for producing a pump with an electric motor for conveying a fluid
  • steps: available provide an impeller with conveyor elements, provide a housing, provide an electric motor with a stator and a rotor for driving the pump, wherein the rotor is provided with permanent magnets, wherein the impeller is arranged with the conveying elements and the electric motor within the housing , Mounting the impeller with
  • a fuel-resistant material eg. B. SmCo
  • the permanent magnets are encapsulated with plastic to produce the encapsulation and then the
  • Permanent magnets with the encapsulation made of plastic in recesses, in particular in blind holes or through holes, introduced and fixed the rotor.
  • Permanent magnets are encapsulated with the adhesive fluid-tight and the
  • Permanent magnets are adhesively attached to the rotor with the adhesive.
  • the permanent magnets in the recesses in particular blind holes or through holes, introduced the rotor and then the recesses are each closed with at least one lid, in particular the blind holes are fluid-tight, each with a lid or the through holes are fluid-tight with two lids closed, so that the permanent magnets are encapsulated by the rotor and the lids fluid-tight.
  • Inventive high-pressure injection system for an internal combustion engine in particular for a motor vehicle, comprising a high-pressure pump, a high-pressure rail, an electric feed pump for conveying a fuel from a fuel tank to the high-pressure pump, wherein the electric Pre-feed pump is designed as a pump described in this patent application.
  • the stator comprises a soft magnetic core, in particular a laminated core, windings as electromagnets and preferably electrical contact elements.
  • permanent magnets are integrated in the impeller, so that the rotor is formed by the impeller.
  • the conveying elements are blades or teeth of a gear.
  • the pump is a gear pump, in particular internal gear pump.
  • the impeller forms the rotor and / or on or in the impeller, the permanent magnets are arranged or integrated, d. H.
  • the pump is integrated in the electric motor or vice versa.
  • the pump is integrated in the electric motor or vice versa, preferably, the pump and the electric motor are inseparable units.
  • the rotor is partially made of sheet metal plates.
  • the metal plates are surrounded by an insulating layer. The insulation around the metal plates and the formation of the rest of the rotor made of sheet metal plates has the task that no or only very small eddy currents occur in the rotor.
  • the rotor is at least partially, in particular completely made of sintered steel.
  • the pump with electric motor comprises a
  • the pump is an external gear pump or a centrifugal pump or a vane cell pump.
  • the pump with, preferably integrated, electric motor comprises a, preferably electronic, control unit for controlling the energization of the electromagnets.
  • the pump is a turbomachine.
  • metal for.
  • the delivery rate of the electrical feed pump can be controlled and / or regulated.
  • FIG. 1 is a highly schematic view of a high-pressure injection system
  • FIG. 2 is a perspective view of a prefeed pump without housing u a stator
  • FIG. 3 is an exploded view of the prefeed pump of FIG. 2,
  • FIG. 4 shows a partial section of the rotor in a first embodiment with a permanent magnet
  • 5 shows a partial section of the rotor in a second embodiment with a permanent magnet
  • 6 is a partial section of the rotor in a third embodiment with a permanent magnet and a permanent magnet
  • Fig. 7 is a partial section of the rotor in a fourth embodiment
  • FIG. 10 is a view of a motor vehicle.
  • FIG. 1 shows a pump arrangement 1 of a high-pressure injection system 2.
  • An electric prefeed pump 3 promotes fuel from a fuel tank 41 through a fuel line 35 fuel. Subsequently, the fuel is conveyed from the electric prefeed pump 3 to a high-pressure pump 7.
  • the high-pressure pump 7 is of an internal combustion engine 39 by means of a
  • the electric prefeed pump 3 has an electric motor 4 and a pump 5 (FIGS. 2 and 3).
  • the electric motor 4 of the pump 5 is integrated into the pump 5 and further, the electric prefeed pump 3 at the
  • High pressure pump 7 arranged directly.
  • the high-pressure pump 7 delivers fuel under high pressure, for example, a pressure of 1000, 3000 or 4000 bar, through a high pressure fuel line 36 to a high pressure rail 42. From the high pressure rail 42 of the fuel under high pressure from an injector 43 a combustion chamber, not shown
  • Fuel tank 41 returned.
  • the porting openings 28 (FIG. 2) of the electric prefeed pump 3 are without an external connection to the high-pressure pump 7 connected.
  • the mounting position of the electric prefeed pump 3 to the high-pressure pump 7 is chosen to the effect that by short
  • Pre-feed pump 3 a fuel filter 38 is installed.
  • the electric motor 4 (FIGS. 2 and 3) of the electric prefeed pump 3 is operated with three-phase current or alternating current and can be controlled and / or regulated in power.
  • the three-phase current or alternating current for the electric motor 4 is provided by a power electronics, not shown, from a DC voltage network of a vehicle electrical system of a motor vehicle 40.
  • the electric prefeed pump 3 is thus an electronically pumped prefeed pump 3rd
  • the electric prefeed pump 3 has a housing 8 with a housing pot 10 and a housing cover 9 (FIG. 3). Within the housing 8 of the prefeed pump 3, the pump 5 as internal gear 6 and
  • Gear pump 26 and the electric motor 4 is arranged.
  • the housing pot 10 is provided with a recess 56.
  • the electric motor 4 has a stator 13 with windings 14 as electromagnets 15 and a soft iron core 45 as a soft magnetic core 32, which is formed as a laminated core 33.
  • the pump 5 is positioned as an internal gear pump 6 with an internal gear 22 with an internal gear ring 23 and an external gear 24 with an external gear ring 25.
  • the inner and outer gear 22, 24 thus represents a gear 20 and an impeller 18 and the inner and outer toothed ring 23, 25 have teeth 21 as conveying elements 19.
  • a working space 47 is formed between the inner and outer gear 22, 24, a working space 47 is formed.
  • permanent magnets 17 are installed, so that the external gear 24 also forms a rotor 16 of the electric motor 4.
  • the electric motor 4 is thus integrated into the pump 5 or vice versa.
  • the electromagnets 15 of the stator 13 are alternately energized, so that due to the on the
  • Electromagnet 15 resulting magnetic field of the rotor 16 and the
  • External gear 24 is set in a rotational movement about a rotation axis 27.
  • electrical contact elements 34 are arranged, which serve to energize the electromagnets 15.
  • the contact elements 34 are after assembly in the recess 56 of the housing pot 10th
  • the housing cover 9 serves as a bearing 1 1 or thrust bearing 1 1 or slide bearing 1 1 for the inner or outer gear 22, 24. Further, in the housing cover 9, a suction port opening 29 and a pressure porting opening 30, each as
  • the fluid to be delivered namely fuel
  • the pressure port opening 30 the fuel flows out of the prefeed pump 3 again.
  • the housing pot 9 and the housing cover 10 each have three holes 46, in which screws not shown for
  • Fig. 4 is a first embodiment of the rotor 16 and des
  • the external gear 24 has a plurality of recesses 48, in each of which the permanent magnet 17 is arranged. Due to the sectional formation in Fig. 4, only one recess 48 is shown, which is designed as a blind hole 49. Within the blind hole 49 of the permanent magnet 17 is enclosed by an encapsulation 31 of adhesive 51 completely fluid-tight. In this case, when conveying the fluid with the pump 5 with electric motor 4, the external gear 24 is surrounded by fuel 55 as a fluid to be conveyed. Due to the complete and fluid-tight enclosure of the permanent magnet 17 with the encapsulation 31 of adhesive 51 of the
  • Permanent magnet 17 is a strong permanent magnet 17 and consists of NdFeB (neodymium, iron and boron), which would oxidize upon contact with the fuel, thereby reducing the magnetic properties.
  • the encapsulation 17 of adhesive 51 also serves to firmly attach the permanent magnets 17 in the blind holes 49 of the external gear 24 by means of gluing.
  • a second embodiment of the external gear 24 is shown.
  • the recess 48 is here not formed as a blind hole 49 but as a through hole 50.
  • the encapsulation 31 is made of adhesive and is used in addition to the fluid-tight enclosure 31 of
  • a third embodiment of the external gear 24 is shown with the permanent magnet 17.
  • the permanent magnets 17 are inserted into an injection mold and then encapsulated with thermoplastic material.
  • Permanent magnets 17 are thus completely fluid-tight by a
  • Plastic injection 52 is pressed into the through holes 50.
  • the encapsulations 31 have a slight oversize with respect to the through-holes 50 as a plastic encapsulation 52, so that the permanent magnets 17 with the plastic encapsulation 52 are thereby frictionally connected to the impeller 18 or the external gear 24, ie. H. are trapped in the
  • Plastic extrusion 52 are also trapped in blind holes 49 of the external gear 24 (not shown).
  • a fourth embodiment of the external gear 24 is shown with the permanent magnet 17.
  • the external gear 24 is formed with a plurality of blind holes 49 as recesses 48.
  • the external gear 24 is formed with a plurality of blind holes 49 as recesses 48.
  • blind holes 49 each sealed fluid-tight with a lid 53.
  • the covers 53 are connected by means of a fluid-tight weld 54 cohesively with the outer gear 24.
  • the permanent magnets 17 are thus initially introduced into the blind holes 49, Subsequently, materially connected by means of the adhesive 51 with the impeller 18 and subsequently sealed the blind holes 49 each with the lid 53 fluid-tight.
  • a fifth embodiment of the external gear 24 and the rotor 16 is shown with the permanent magnet 17.
  • the permanent magnet 17 essentially only the differences to the fourth
  • the permanent magnets 17 are arranged in through holes 50 as recesses 48.
  • a through hole 50 is closed by two lids 53 and the lid 53 are each with a completely circumferential weld 54 with the
  • the through hole 50 is like the blind hole 49 in the
  • Embodiment of FIG. 7 closed fluid-tight and the
  • Outer gear 24 and the two covers 53 thus form the encapsulation 31 for fluid-tight sealing of the permanent magnets 17 with respect to the rotor 55 surrounding the fuel 55.
  • the permanent magnets 17 by means of the adhesive 51 is materially connected to the external gear 24 ,
  • a sixth embodiment of the rotor 16 is shown.
  • the rotor 16 has a plurality of through holes 50.
  • Through holes 50 are not closed at its two ends and within the through hole 50 is a respective permanent magnets 17 are connected by means of adhesive 51 to the external gear 24. It is the
  • Permanent magnets 17 are not completely enclosed by the adhesive 51, so that the fuel 55 at the end portions of the permanent magnets 17 can come into contact with the permanent magnet 17.
  • Permanent magnets 17 consists of a fuel-resistant material, for. B. SmCo (samarium, cobalt), so that even with a contact of the fuel 55 with the permanent magnet 17 no damage or a reduction of the magnetic forces of the permanent magnet 17 occur.
  • B. SmCo sinarium, cobalt
  • Permanent magnets 17 analogously arranged as in the embodiment of FIG. 9 in a blind hole 49 and thereby by means of adhesive 51 with the External gear 24 is connected, wherein the adhesive 51 does not completely surround the permanent magnets 17.
  • the permanent magnet 17 consists of fuel-resistant material, so that no damage to the permanent magnet 17 is formed in a contact between the fuel 55 and the permanent magnet 17th in this embodiment, not shown.

Landscapes

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

Abstract

Pompe à moteur électrique, notamment pour un véhicule à moteur, destinée à la circulation d'un fluide et comportant une roue à aubes qui est dotée d'éléments de refoulement et effectue un mouvement de rotation autour d'un axe de rotation, un espace de travail disposé sur la roue à aubes (18), un moteur électrique avec un stator et un rotor (16), le rotor (16) étant pourvu d'aimants permanents (17), un carter (8), la roue à aubes (18) avec les éléments de refoulement et le moteur électrique étant montés dans le carter, et la pompe étant de préférence intégrée dans le moteur électrique ou inversement, le rotor (16) étant formé par la roue à aubes (18). Selon l'invention, les aimants permanents (17) du rotor (16) sont totalement confinés de manière étanche aux fluides par un blindage (31) et/ou les aimants permanents (17) sont constitués d'un matériau résistant au carburant, par ex. SmCo.
PCT/EP2011/064998 2010-09-23 2011-08-31 Pompe à moteur électrique Ceased WO2012038213A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010041234 DE102010041234A1 (de) 2010-09-23 2010-09-23 Pumpe mit Elektromotor
DE102010041234.1 2010-09-23

Publications (2)

Publication Number Publication Date
WO2012038213A2 true WO2012038213A2 (fr) 2012-03-29
WO2012038213A3 WO2012038213A3 (fr) 2012-05-24

Family

ID=44532866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/064998 Ceased WO2012038213A2 (fr) 2010-09-23 2011-08-31 Pompe à moteur électrique

Country Status (2)

Country Link
DE (1) DE102010041234A1 (fr)
WO (1) WO2012038213A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014154388A1 (fr) * 2013-03-27 2014-10-02 Robert Bosch Gmbh Pompe dotée d'un moteur électrique
DE102017217937A1 (de) * 2017-10-09 2019-04-11 Zf Friedrichshafen Ag Sekundärelement für eine elektrische Maschine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3540232A1 (fr) * 2018-03-14 2019-09-18 Sulzer Management AG Pompe centrifuge comportant des moyens d'équilibrage, disque d'équilibrage et procédé d'équilibrage des forces axiales de la pompe centrifuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052870A1 (de) 2005-10-28 2007-05-03 Temic Automotive Electric Motors Gmbh Elektrische Maschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3582789B2 (ja) * 2002-10-01 2004-10-27 セイコーインスツルメンツ株式会社 モータ装置用永久磁石、モータ装置、及び着磁方法
JP2007205246A (ja) * 2006-02-01 2007-08-16 Toyota Motor Corp ウォータポンプおよびハイブリッド車両
WO2009126853A2 (fr) * 2008-04-11 2009-10-15 Cooper Standard Automotive, Inc. Ensemble rotor comprenant un ensemble de noyaux d'aimants frittés
JP2010130884A (ja) * 2008-12-01 2010-06-10 Mitsubishi Electric Corp 回転電機及び回転電機の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005052870A1 (de) 2005-10-28 2007-05-03 Temic Automotive Electric Motors Gmbh Elektrische Maschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014154388A1 (fr) * 2013-03-27 2014-10-02 Robert Bosch Gmbh Pompe dotée d'un moteur électrique
CN105143674A (zh) * 2013-03-27 2015-12-09 罗伯特·博世有限公司 具有电马达的泵
JP2016514787A (ja) * 2013-03-27 2016-05-23 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 電動モータを備えるポンプ
DE102017217937A1 (de) * 2017-10-09 2019-04-11 Zf Friedrichshafen Ag Sekundärelement für eine elektrische Maschine

Also Published As

Publication number Publication date
WO2012038213A3 (fr) 2012-05-24
DE102010041234A1 (de) 2012-03-29

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