WO2017000987A1 - Pompe à liquide électrique pour véhicule - Google Patents

Pompe à liquide électrique pour véhicule Download PDF

Info

Publication number
WO2017000987A1
WO2017000987A1 PCT/EP2015/064797 EP2015064797W WO2017000987A1 WO 2017000987 A1 WO2017000987 A1 WO 2017000987A1 EP 2015064797 W EP2015064797 W EP 2015064797W WO 2017000987 A1 WO2017000987 A1 WO 2017000987A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid pump
cover part
vehicle liquid
motor
pump
Prior art date
Application number
PCT/EP2015/064797
Other languages
German (de)
English (en)
Inventor
Stephan Schreckenberg
Original Assignee
Pierburg Pump Technology 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 Pierburg Pump Technology Gmbh filed Critical Pierburg Pump Technology Gmbh
Priority to EP15734339.3A priority Critical patent/EP3317951A1/fr
Priority to PCT/EP2015/064797 priority patent/WO2017000987A1/fr
Publication of WO2017000987A1 publication Critical patent/WO2017000987A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • 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
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/163—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at only one end of the rotor

Definitions

  • the invention relates to an electrical motor vehicle liquid pump (motor vehicle fluid pump), in particular a motor vehicle coolant pump, comprising a pump unit and a motor unit, the pump unit having a fluid channel with at least one inlet and one outlet and one usually arranged with a drive shaft in the fluid channel coupled fluid conveying element for conveying a liquid, such as a paddle wheel, and the motor unit for driving the fluid conveying element has a brushless drive motor with a rotatably mounted motor rotor and a fixed motor stator,
  • Such electric motor vehicle liquid pumps are well known from the prior art and serve in particular as a coolant, fuel or lubricant pump.
  • the drive motor of such liquid pumps is often designed as a so-called canned motor, in which the motor rotor is arranged in a wet space, which is surrounded by coolant, fuel or lubricant.
  • a shielding of the electrical engine components is mitteis a split tube body, which separates the inner wet space of an outer dry space, in which, for example, electrical components, such as stator coils, are arranged.
  • Such motor rotors are therefore also referred to as wet runners.
  • Such a canned motor pump is known for example from DE 103 01 613 AI.
  • the liquid located in the wet space can cause drag losses on the motor rotor due to the resistance in moving the Motor rotor by the standing liquid and lead to increased corrosion on the motor rotor.
  • Object of the present invention is therefore to provide a motor vehicle liquid pump, in which the drag losses and corrosion are minimized, so that an increase in the efficiency and the life of the pump are possible. Furthermore, a relatively easy to install vehicle liquid pump to be created, which is inexpensive to produce.
  • the motor rotor has a cup-shaped housing body which limits the motor rotor circumferentially and at least on an axial Stirnselte over the entire surface to the outside.
  • the housing body thus forms part of the motor rotor and is rotatably connected thereto.
  • the housing body may form an outer skin of the motor rotor, which may in particular have a continuous or gap-free and substantially elevation-free outer circumferential surface, so that the drag and friction losses during rotation of the Motor rotor can be minimized.
  • frictional losses due to gaps or depressions between the magnets can be completely ruled out and thus the running properties of the motor rotor can be significantly improved and the efficiency of the pump can be increased.
  • the housing body can serve as a seal of the motor rotor or the motor-rotor components located within the housing body with respect to a wet space in which the motor rotor can be arranged.
  • the housing body has, in particular, a thin-walled cylinder section, which is arranged coaxially to the drive shaft and is closed at one axial end by a thin-walled disk, so that a pot or cup is formed.
  • This pot-shaped housing body can be slid axially during assembly in a relatively simple manner to a free end of the motor rotor, in particular one or more arranged on the motor rotor rotor components, such as magnets.
  • the inside of the housing body can in this case rest against the rotor components.
  • the housing body may be pressed or shrunk onto the rotor components.
  • On the unclosed side of the cylinder portion of the housing body may rest against a drive shaft paragraph or a separately formed lid, be pushed or pushed onto this, so that a complete seal of the engine-rotor components is possible with respect to an ambient space.
  • the housing body may be pushed with its cylinder portion on one of the pump unit facing end side or on one of the pump unit facing away from the motor rotor. It has proven to be advantageous that the housing body, the motor rotor on one of Pump unit facing away from the axial end surrounds. As a result, the housing body can be pushed or removed onto the motor rotor even in a mounted state of the motor unit on the pump unit, which is advantageous in particular during repairs or recycling of the pump.
  • Housing body on one of the pump unit facing end side of the motor rotor preferably has a separately formed housing cover.
  • the housing body can be closed by the housing cover on the aforementioned end face of the motor rotor.
  • the housing cover may be disc-shaped and in particular rotatably connected to the housing body. The housing cover thus rotates with the motor rotor in this case and forms part of the motor rotor.
  • the housing body is pushed axially onto the housing cover, so that the housing body surrounds the housing cover radially.
  • the housing body may also be pressed onto the housing cover and / or adhesively bonded thereto. Thereby, a complete sealing of the transition point between the housing body and the housing cover can be provided in a relatively simple manner.
  • the housing cover is formed at least in two parts and has a radially inwardly arranged first cover part and a radially outer separate separate second cover part.
  • the two cover parts are preferably round, coaxial with each other and sealingly connected to each other on a circumferential path.
  • the second cover part may have a central opening or recess in which the first cover part is inserted.
  • the recess is formed in particular round and has a diameter which is smaller or the same size as the outer diameter of the first cover part. Consequently, that can second cover part may be formed as an annular disc, which can be pushed or slipped on the first cover part.
  • the second cover part can be fixed radially and / or axially to the first cover part with a web or an undercut.
  • a seal can be provided at the transition point between the first cover part and the second cover part so that a complete fluidic seal is possible.
  • the first cover part has an outer diameter which corresponds to about half of the outer diameter of the second cover part, so that the pump can be constructed relatively compact.
  • the first cover part has a central opening through which the drive shaft extends.
  • the opening is formed in particular round and has a diameter which corresponds approximately to the diameter of the drive shaft in the plane or the seat of the first cover part.
  • the housing cover! or the first cover part may thus be formed as an annular disc, which can be pushed onto the drive shaft.
  • a seal may be provided, so that a complete fluidic seal is made possible.
  • the first cover part preferably has a receiving device for an axial plain bearing disc.
  • the receiving device may in particular be arranged on the housing body facing away from the front side surface of the first cover part.
  • the motor rotor can be stored axially in a relatively simple and space-saving manner, so that the liquid pump can be made compact and relatively inexpensive manufactured.
  • the first cover part is pressed onto the drive shaft or marrum ft and thus forms part of the motor rotor.
  • the housing cover can be sealed particularly well with respect to the housing body and the fluid pump can be constructed relatively compact.
  • the first cover part and the second cover part can be made of the same material.
  • the first cover part is made of a solid material, for example of steel
  • the second cover part is made of an elastic material, for example of an elastomer.
  • the second cover part can be designed to be completely elastic, so that the housing body can be flushed over the elastic second cover part in a relatively simple manner.
  • the second cover part at the transition parts to the first cover part and / or the housing body develop a sealing effect or serve as a seal.
  • the second cover part in an outer peripheral region on a circumferential and axially projecting in the direction of the pump unit web or collar.
  • the web is advantageously made in one piece with the second cover part and in particular forms the radial end of the second cover part.
  • the web can thus serve as a seal relative to the housing body in a relatively simple manner, so that a complete seal of the interior relative to the surroundings of the motor rotor is made possible.
  • a sealing lip may be arranged on the radial peripheral surface, which consists of a plurality of circumferential elevations or projections, which are arranged one behind the other in the axial direction and in each case radially outward protrude.
  • the elevations may be tapered radially outwardly tapered or chamfered on both sides, so that in combination with an inner side surface of the housing body, against which the seal is applied, a relatively good seal can be made.
  • the seal may in particular be formed integrally with the second cover part.
  • the second cover part in an outer peripheral region at a transition from an outer peripheral surface to an axial, in particular the housing body facing end face on a circumferential chamfer.
  • the housing body can be pushed or pushed over the outer edge or the outer peripheral surface of the second cover part in a relatively simple manner, so that the assembly is simplified.
  • the second cover part has at least one stiffening element.
  • the second cover part in particular during production from an elastomer, can be held in its shape and yet be elastic.
  • the second cover part in particular, with a pressure difference between an encapsulated interior of the motor rotor and the surroundings of the motor rotor, it may be advantageous for the second cover part to be held in the desired shape by means of a stiffening element.
  • the stiffening element is an annular steel insert.
  • the steel insert may be inserted in an outer circumferential region in the second cover part and completely surrounded by the second cover part, in particular when designing the second cover part made of an elastomer.
  • the second cover part protect the steel insert from corrosion.
  • the stiffening element is a separately formed spring ring.
  • the spring ring can - especially in the design of the second cover part made of an elastomer - on an outer peripheral portion of the second cover part, in particular a web, rest and bias the second cover part radially outward against the housing body. This allows a particularly good seal at the transition point between the second cover part and the housing body are made possible.
  • the motor rotor has a magnetic body coupled to a drive shaft, wherein the magnetic body is surrounded by the housing body on the circumferential side and at least on an axial end face.
  • the term "magnetic bodies * is understood to present each magnetic or magnetizable body, in particular a permanent magnet, ferromagnet or other magnetic or magnetizable body.
  • the magnetic body is made of copper, nickel or neodymium.
  • the magnet body may have a magnet carrier and at least one permanent magnet arranged on the magnet carrier.
  • the magnetic carrier for example, be a so-called sheet package, which has recesses for receiving the permanent magnets.
  • the motor stator for driving the motor rotor can have a plurality of stator coils which can be energized and which are advantageously arranged radially around the motor rotor. This allows the drive shaft, on the For example, permanent magnets are arranged to be driven in a relatively simple manner.
  • the motor unit comprises a canned body which separates a wet area, in which the motor rotor is arranged, from a dry area, in which the motor stator is arranged.
  • FIG. 1 shows schematically a longitudinal section of an electrical fluid pump with a first embodiment of a motor-rotor encapsulation
  • FIG. 2 schematically shows a first embodiment of a housing cover of an electric fluid pump for motor-rotor encapsulation
  • FIG. 3 schematically shows a second embodiment of a housing cover of an electric liquid injection pump for motor-rotor encapsulation.
  • an electric vehicle liquid pump 1 is shown in longitudinal section.
  • the liquid pump 1 serves in the present case as a coolant pump for supplying a vehicle drive motor, for example an internal combustion engine, and further units, such as a battery, an electric motor, a charge air cooler, etc. with a liquid coolant, for example with cooling water.
  • the liquid pump 1 can be divided axially into a pump unit 2 and a motor unit 3.
  • the pump unit 2 essentially comprises a fluid channel 20 through which the cooling water can flow, the cooling water flowing through an inlet 21 into the fluid channel 20 and flowing out of the fluid channel 20 through an outlet 22.
  • a pump Conveying element 23 is arranged, which is presently designed as a pump impeller.
  • the pump delivery element 23 is mounted on a drive shaft 4 which is driven by a drive motor 30 located in the motor unit 3, in particular an electric motor. As a result, the drive shaft 4 extends from the pump unit 2 into the motor unit 3.
  • the motor unit 3 or the drive motor 30 comprises a motor motor 5 and a motor stator 6 arranged around the motor rotor 5.
  • the drive motor 30 is designed as a so-called canned drive motor which has an internal coolant space 31 and an external drying space 32 , The coolant chamber 31 and the drying chamber 32 are separated by a substantially cylindrically shaped canned body 33 from each other.
  • the motor rotor 5 is magnetically excited by one or more magnetic bodies 50 arranged on a magnet carrier 51, in particular permanent magnets 50a, 50b, and is set in rotation by circulating magnetic fields which are generated by energizable stator coils 60a, 60b.
  • the motor rotor 5 has a capsule element 55 in the form of a housing body 7 with a housing cover 8, whereby an encapsulated motor-rotor space or interior 54 of the capsule element 55 is separated from the coolant space 31.
  • the coolant flowing through the coolant chamber 31 can not enter the encapsulated engine rotor chamber 54.
  • the permanent magnets 50a, 50b arranged on the drive shaft 4 and the magnetic carrier 51 are located in the encapsulated motor-type rotor 54.
  • the housing body 7 is cup-shaped or cup-shaped and has in particular a cylinder portion 71 and a cylinder portion 71 on one side closing bottom 72.
  • the housing body 7 is arranged on the motor rotor 5 such that the housing body 7 in the cylinder section 71, the permanent magnets 50 a, 50 b, the magnetic carrier 51 and at least partially the drive shaft 4th completely radially surrounds.
  • the bottom 72 of the housing body 7 delimits the permanent magnets 50a, 50b, the magnet carrier 51 and the drive shaft 4 on an end face 52 facing away from the pump unit 2.
  • the housing body 7 lies at least in the cylinder section 71 and at the bottom 72 with one inside each close to the magnets 50a, 50b.
  • the housing body 7 is pressed onto the magnets 50a, 50b and thus fixed relative to the drive shaft.
  • the motor rotor 5 can have a virtually gap-free peripheral surface, so that the motor rotor 5 can rotate in the wet region essentially without drag losses or resistance torques.
  • the magnets 50a, 50b and the magnetic carrier 51 can be protected from corrosion.
  • the housing cover 8 seals the encapsulated motor rotor surface 54 on a side facing the pump unit 2, in particular an end face 53 of the magnet carrier 51, with respect to the coolant space 31.
  • the housing cover 8 sits as accurately as possible radially between the drive shaft 4 and the cylinder portion 71 of the housing body 7.
  • the housing cover 8 can be pushed onto the drive shaft 4 and / or be pressed.
  • the bottom 72 then abuts on a side facing away from the pump unit 2, in particular an end face 52 of the magnet carrier 51, on the magnet carrier 51 and / or on the drive shaft 4.
  • the housing cover 8 has a radially inner first cover part 81 and a radially outer separate second cover part 82 over the radial extent thereof. Both cover parts 81, 82 are formed round and fixed to one another at a transition point, which is arranged substantially in the region of half the total diameter of the housing cover 8.
  • the first cover part 81 is presently made of a solid material, for example made of steel, and is rotatably connected to the drive shaft 4.
  • the first cover part 81 has a centric Opening 80, with which the first cover part 81 is pressed onto the drive shaft 4 or marrum ft, so that the drive shaft 4 extends through the opening 80. It is not shown, however, can be provided that on the drive shaft 4 in addition a step is formed, on which the first cover part 81 bears axially.
  • a receiving device 83 is arranged for an axial slide bearing disc, not shown, the Axiai Gleitiagerusion may in particular be part of a thrust bearing, so that by this arrangement of the motor rotor 5 , . the drive shaft 4 can be stored at least axially.
  • the second cover part 82 is in the present case made of an elastic material, for example of an elastomer, and is rotatably connected to the first cover part 81.
  • the second cover part 82 is formed as a sleeve which is slipped over a shoulder formed thereon for fixing to the first Deckelteii 1.
  • the second cover! 82 can be bent in a relatively simple manner at least in the axial direction due to its elasticity, so that a mounting of the system is relatively simple.
  • the second cover part 82 has a peripheral web 85 which protrudes axially in the direction of the pump unit 2.
  • This web 85 serves to stiffen and / or seal the housing cover 8 relative to the housing body 7.
  • 85 different accessories can be arranged on the web, which are shown in more detail in Figures 2 to 4.
  • a stiffening element 9 may be embedded in the second cover part 82 in the circumferential region 84.
  • the stiffening element 9 may be a ring or a profile made of a solid material such as steel.
  • the elastic second cover part 82 can be stiffened in its shape at least in this area, and in particular when a pressure difference occurs at the two axial end faces of the second cover part 82 remain dimensionally stable.
  • the second cover part 82 from the housing body 7 axially slips off in the direction of the pump unit 2 and thus removes a disposed on an outer peripheral surface 86 in the personallysberelch 84 radial seal 87 of the second cover member 82 relative to the housing body 7.
  • the radial seal 87 is illustrated again in FIG. 2.
  • a sealing lip is arranged on the radial peripheral surface 86, which is integrally formed with the second cover part 82 and consists of a plurality of peripheral elevations or projections which are arranged one behind the other in the axial direction and respectively protrude radially outside.
  • the second cover part 82 has an encircling chamfer 89 between the peripheral surface 86 and an axial end face 88 facing away from the pump unit 2.
  • the housing cover 8 in particular the second cover part 82, as shown in Figure 3 - in the outer peripheral region 84 in addition via a clamp or springs ng 91 radially outward against the Zyiinderabrough 71 of the housing body 7 to be biased.
  • the housing cover 8 is pushed onto the drive shaft 4.
  • the housing body 7 via the magnets 50a, 50b pushed and fixed, for example by means of a press fit to the magnets 50a, 50b.
  • the housing body 7 can be pushed with the open cylindrical end over the second cover part 82 of the housing cover 8. Due to the elasticity of the second cover part 82, this can be done in a relatively simple catfish. Subsequently, the second cover part 82, for example, by means of the spring ring 89 biased radially outward on the housing body 7 out.

Landscapes

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

Abstract

L'invention concerne une pompe à liquide (1) électrique pour véhicule, comprenant une unité pompe (2) et une unité moteur (3), l'unité pompe (2) présentant un canal de fluide (20) qui abrite un élément d'acheminement de fluide (23), et l'unité moteur (3) présentant un moteur d'entraînement sans balai (30), pourvu d'un rotor (5) monté rotatif et d'un stator (6) fixe, et ceci aux fins d'entraînement de l'élément d'acheminement de fluide (23) . Pour augmenter la durée de vie et le rendement de la pompe à liquide, le rotor (5) présente un corps carter (7) en forme de pot, lequel corps carter délimite le rotor (5) entièrement vers l'extérieur au niveau de sa périphérie et d'au moins sur une face frontale axiale (52, 53).
PCT/EP2015/064797 2015-06-30 2015-06-30 Pompe à liquide électrique pour véhicule WO2017000987A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15734339.3A EP3317951A1 (fr) 2015-06-30 2015-06-30 Pompe à liquide électrique pour véhicule
PCT/EP2015/064797 WO2017000987A1 (fr) 2015-06-30 2015-06-30 Pompe à liquide électrique pour véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/064797 WO2017000987A1 (fr) 2015-06-30 2015-06-30 Pompe à liquide électrique pour véhicule

Publications (1)

Publication Number Publication Date
WO2017000987A1 true WO2017000987A1 (fr) 2017-01-05

Family

ID=53514171

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/064797 WO2017000987A1 (fr) 2015-06-30 2015-06-30 Pompe à liquide électrique pour véhicule

Country Status (2)

Country Link
EP (1) EP3317951A1 (fr)
WO (1) WO2017000987A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504994A2 (fr) * 1991-03-20 1992-09-23 Gold Star Co. Ltd Moteur électrique à rotor noyé pour une pompe
EP1209799A2 (fr) * 2000-11-23 2002-05-29 WILO GmbH Palier axial pour le rotor d'une machine électrique
EP1533883A1 (fr) * 2003-11-18 2005-05-25 SISME IMMOBILIARE S.p.A. Rotor à aimant permanent à assemblage rapide pour moteurs électriques et procédé de fabrication d'un tel rotor
DE102013210726A1 (de) * 2013-06-10 2014-12-11 Robert Bosch Gmbh Naßbetriebener Anker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0504994A2 (fr) * 1991-03-20 1992-09-23 Gold Star Co. Ltd Moteur électrique à rotor noyé pour une pompe
EP1209799A2 (fr) * 2000-11-23 2002-05-29 WILO GmbH Palier axial pour le rotor d'une machine électrique
EP1533883A1 (fr) * 2003-11-18 2005-05-25 SISME IMMOBILIARE S.p.A. Rotor à aimant permanent à assemblage rapide pour moteurs électriques et procédé de fabrication d'un tel rotor
DE102013210726A1 (de) * 2013-06-10 2014-12-11 Robert Bosch Gmbh Naßbetriebener Anker

Also Published As

Publication number Publication date
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