WO2019185211A1 - Electric media flow machine for a compressor and/or a turbine - Google Patents

Electric media flow machine for a compressor and/or a turbine Download PDF

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Publication number
WO2019185211A1
WO2019185211A1 PCT/EP2019/051427 EP2019051427W WO2019185211A1 WO 2019185211 A1 WO2019185211 A1 WO 2019185211A1 EP 2019051427 W EP2019051427 W EP 2019051427W WO 2019185211 A1 WO2019185211 A1 WO 2019185211A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
flow
rotor
media
inner sleeve
Prior art date
Application number
PCT/EP2019/051427
Other languages
German (de)
French (fr)
Inventor
Michael Baeuerle
Thomas Fruehschuetz
Dalton De Paula CAVALCANTI
Linus FERLINZ
Ralph Glemser
Maximilian AURACHER
Frank Gottwald
Rene Schepp
Joerg Mayer
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 WO2019185211A1 publication Critical patent/WO2019185211A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/02—Drives of pumps; Varying pump drive gear ratio
    • F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
    • F02B39/10—Non-mechanical drives, e.g. fluid drives having variable gear ratio electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
    • F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • 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
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/40—Engines with pumps other than of reciprocating-piston type with rotary pumps of non-positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Electric medium-flow machine for a compressor and / or a turbine in particular an exhaust gas turbocharger of an internal combustion engine, with a housing having a media inlet and a media outlet, with a rotatably mounted in the housing shaft, with a rotatably mounted on the shaft rotor and with a housing fixed stator, the one
  • stator teeth extending through the outer sleeve at least as far as the inner sleeve, the inner sleeve and the outer sleeve being the only ones which carry a plurality of flow channels through the stator
  • the invention relates to a compressor and / or a turbine, in particular exhaust gas turbocharger, with a housing and with a rotatably mounted in the housing shaft on which at least one compressor or turbine wheel is rotatably mounted, and with an electric media stream machine, one on the shaft rotatably mounted rotor and a stator fixed to the stator, wherein the stator has a drive winding and a plurality of radially inwardly projecting stator teeth.
  • Turbochargers in particular exhaust gas turbochargers, are used, in particular in motor vehicle construction, to increase the air charge in cylinders of an internal combustion engine in order to increase the power of the internal combustion engine.
  • exhaust gas turbochargers are used, which are driven by the exhaust gas flow of the internal combustion engine.
  • Exhaust gas turbocharger provided with an electric machine to drive the shaft of the exhaust gas turbocharger, on which a compressor wheel and a turbine wheel are arranged rotationally fixed.
  • the otherwise delayed boost pressure buildup can be significantly accelerated.
  • the stator usually has an annular stator yoke and radially inwardly protruding from the stator yoke stator teeth, which in
  • stator teeth Seen circumferentially spaced from each other evenly distributed.
  • the stator teeth are usually wrapped by a multi-phase drive winding, wherein by energizing the phases of the
  • the rotating drive magnetic field is generated, through which the rotatably mounted by the shaft rotor is driven with a predetermined torque.
  • the rotor expediently has at least one
  • stator surrounding the rotor and statorfest arranged inner sleeve and a coaxially arranged, the inner sleeve enclosing, outer sleeve, present, which together with the stator teeth more
  • the flow channels are bounded laterally by outer sleeve, inner sleeve and the through the outer sleeve at least up to the inner sleeve, possibly also through the inner sleeve extending therethrough stator teeth.
  • a cap is also disposed which merges into the inner sleeve, or the inner sleeve extends upstream of the rotor also frontally with the rotor, to penetration of medium into the media gap, which is present radially between the stator teeth and the rotor prevent.
  • the electric medium flow machine with the features of claim 1 has the advantage that an advantageous embodiment of the medium in the compressor or the turbine is present, because the shape of the media flow machine leads to an early homogenization of the medium flowing through. As a result, the media flow machine can be positioned closer to the compressor wheel or turbine wheel, whereby the stability of the rotor run of the media flow machine is favored. Due to the targeted change of the flow-through cross-section of the flow channels in the flow direction is also the
  • Flow rate of the medium influenced so that the operation of the compressor and / or the turbine can be further optimized.
  • the radial distance between outer sleeve and inner sleeve changes in its axial extension.
  • the radial distance between Outer sleeve and inner sleeve and thus the flow cross section of the respective flow channel thus changes in the flow direction of the medium.
  • the distance between the outer sleeve and inner sleeve increases the respective
  • the inner sleeve is cone-shaped. This results in a simple change in cross section along the flow path when the outer sleeve does not have the same cone shape as the inner sleeve. This is in a simple and cost-effective way of changing
  • the outer sleeve is cylindrical.
  • the jacket wall of the outer sleeve extends axially parallel to the axis of rotation of the rotor. This results in the change in cross section solely by the conically shaped inner sleeve and optionally by a change in the width of the stator teeth in the radial direction.
  • the cylindrical outer sleeve has the advantage that the drive winding is completely outside the flow channel and is protected by the outer sleeve from the medium. In this case, the drive winding preferably reaches up to the outer sleeve and thus ensures in
  • Axial extent that between outer sleeve and drive winding is always the same distance and the drive winding is produced as usual.
  • the outer sleeve is conical in order to change the flow cross-section of the flow channels, wherein then the inner sleeve is preferably cylindrical.
  • the principle is reversed. This results in the advantage of a cylindrical and thus simply designed rotor.
  • the inner sleeve is conical, preferably also the rotor, which is located in the inner sleeve, formed conical, so that in particular completely fills the interior of the inner sleeve, thereby ensuring maximum efficiency of the media stream machine.
  • the rotor has at least one cone-shaped
  • the cone shape is always oriented in such a way that the cone of the inner sleeve, and in particular that of the rotor, tapers in the flow direction. As a result, the enlargement of the flow channels is ensured in the flow direction. If the cone is formed on the outer sleeve, then the tip of the cone faces the
  • the radial length of the stator teeth increases in the flow direction of the medium, in particular such that a radial distance between the stator teeth and permanent magnets in the flow direction is constant or nearly constant. Due to the cone shape, in particular of the rotor, it follows that the radial extent of the stator teeth
  • Permanent magnet or the rotor changes in the flow direction.
  • the stator teeth are tracked the shape of the rotor seen radially in the flow direction.
  • the stator teeth at the outlet of the flow channel have a larger stator teeth at the outlet of the flow channel.
  • the stator has a plurality of axially abutting stator lamellae, the stator-forming radially projecting stator tooth sections of the stator lamellae in FIG
  • Media stream machine is therefore preferably a slat stator.
  • This is characterized in that a plurality of stator blades, which are formed substantially annular disk-shaped, are axially abutting each other to form the total stator.
  • Each stator blade has one
  • Stator croquabites which projects radially inwardly to form a stator tooth in the overall structure with adjacent Statortechnikaboughen respectively.
  • stator tooth sections are formed differently long, the radial tracking of the stator teeth in the flow direction of the particular conical permanent magnets in a simple and inexpensive manner can be realized. This results in a
  • stator tooth sections or yoke sections of the stator are preferably over the axial length in the
  • the rotor is a the
  • Permanent magnet comprehensive and rotatably connected to the rotor rotor sleeve.
  • the rotor sleeve protects the permanent magnet from the medium and at the same time secures the position of the permanent magnet on the rotor, in that the rotor sleeve provides the permanent magnets with a radial contact surface which securely supports the permanent magnet even at high rotational speeds.
  • the turbine according to the invention and / or the compressor according to the invention are characterized by the inventive design of
  • Media stream machine off This results in the already mentioned advantages.
  • Media inlet and media outlet are in particular part of the housing of the turbine and / or compressor.
  • the media flow machine itself is preferably arranged without a housing in the flow channel of the housing of the turbine or of the compressor, so that the housing of the turbine and / or compressor forms the housing of the media flow machine.
  • Figure 2 is an axial plan view of the media flow machine
  • Figure 3 is a simplified sectional view through the media stream machine.
  • FIG. 1 shows in a simplified longitudinal sectional view a
  • Exhaust gas turbocharger 1 which has a compressor 2 and a turbine 3.
  • the compressor 2 has a compressor wheel 4, which is arranged rotatably on a shaft 5.
  • the shaft 5 is itself rotatable in a housing 6 of the
  • Exhaust gas turbocharger 1 stored.
  • a turbine 7 of the turbine 3 is rotatably connected to the shaft 5.
  • Compressor 4 compressed fresh air supplied and the internal combustion engine is supplied.
  • the rotatable mounting of the shaft 5 in the housing 6 can be realized in different ways. According to a first embodiment
  • the shaft 5 is rotatably supported by at least two bearings 8 and 9 in the housing 6.
  • bearings 8 and 9 are 8.9 two
  • Rolling element bearing available.
  • one of the rolling element bearing is designed as Axialskysky Ratios.
  • the bearing 8 is designed as a magnetic bearing, and the bearing 9, which serves as a thrust bearing, as WälzShoreslager.
  • the compressor 2 regardless of the exhaust stream of
  • Media stream machine 10 has. This is presently integrated into the compressor 2, wherein a rotor 11 of the media flow machine 10 is rotatably mounted on the end remote from the turbine 7 end of the shaft 5. A cooperating with the rotor 11 stator 12 is fixed to the housing fixed in the leading to the compressor impeller 4 flow channel 13 of the coaxial with the rotor 11
  • Exhaust gas turbocharger 1 is arranged.
  • FIG. 2 shows a simplified plan view of the media flow machine 10.
  • the stator 12 has an annular stator yoke 14, of which several are distributed uniformly over the circumference of the stator yoke 14
  • Stator teeth 15 protrude radially inwardly and point in the direction of the rotor 11.
  • the stator teeth 15 end radially spaced from the rotor 11, so that between the stator teeth 15 and the rotor 11 each have an axial air gap 16 remains.
  • the stator 12 is provided with an in particular multi-phase drive winding 17, as shown for example in FIG.
  • the drive winding 17 may be formed as a wound over the stator winding or a radially plugged onto the stator teeth 15 winding, in particular consisting of a plurality of coils, wherein on each stator tooth at least one coil is pushed, such as in the not yet published
  • the media stream machine 10 further comprises a device 18, which is adapted to the flow behavior of the conveyed by the exhaust gas turbocharger 1 medium, ie in particular the fresh air, through the
  • the device 18 has an inner sleeve 19 assigned to the rotor 11, whose inner diameter is larger than the rotor 11, so that it is accommodated in the inner sleeve 19, as shown for example in FIG. 2, and lies without contact in this, so that the rotor 11 is wear-free can rotate within the inner sleeve 19.
  • the Inner sleeve 19 is fixed to the stator 12, so that the inner sleeve 19 is fixed to the housing.
  • the device 18 further has an outer sleeve 20, which is arranged coaxially to the rotor 11 or to the axis of rotation of the shaft 5 and has an inner diameter which is greater than the outer diameter of the inner sleeve 19, so that the outer sleeve 20 radially outwardly spaced from the inner sleeve 19th is attached to the stator 12, in particular to the stator teeth 15.
  • radial support struts which are each integrally connected to inner sleeve 19 and outer sleeve 20, wherein the retaining struts are arranged and formed in particular corresponding to the stator teeth 15, so that the support struts are arranged according to the distribution of the stator teeth 15 and in the final assembly position each axially overlap one of the stator teeth 15, at least in the region of the flow channels 21, in particular upstream.
  • the retaining struts have a flow-optimized profile in order to minimize the pressure medium on the stator teeth 15
  • the outer ring 20 has an outer diameter which is smaller than the
  • stator yoke 14 Inner diameter of the stator yoke 14 so that between the outer ring 20 and stator yoke 14 free spaces between the adjacent stator teeth 15, in which the stator winding 17 is arranged or formed.
  • the drive winding 17 is protected from the medium, but is still cooled over the sleeve.
  • stator teeth 15 extend through the outer sleeve 20 through to the inner sleeve 19, so that between inner sleeve 19, stator teeth 15 and
  • Flow channels 21 in particular form the only flow paths through which the medium can penetrate the media flow machine 10.
  • the rotor 11 is associated with a cover cap upstream, which covers the rotor 11 upstream and in particular designed flow optimized to direct the medium into the flow channels 21.
  • the media path thus does not lie radially between the stator tooth and the rotor, but is provided by the flow channels 21 in the stator 12 itself, so that the medium flows completely through the stator 12. This results in a particularly advantageous stator cooling and the deposition of magnetic and / or magnetizable particles on the rotor is prevented or at least substantially avoided.
  • the outer sleeve 20 is cylindrical, so that it extends in total coaxially or in the flow direction parallel to the axis of rotation of the shaft 5 or the rotor 11, as shown in particular in FIG.
  • FIG. 3 shows, in a perspective longitudinal section, the media stream machine 10 in a detailed view.
  • the rotor 11 has a permanent magnet 22, which rests in a rotor sleeve 23.
  • the permanent magnet 22 is designed conical, wherein the tip of the cone shape is in the flow direction of the medium, as shown by an arrow.
  • the medium flows through a media inlet 24 of the housing 6 into the exhaust gas turbocharger 1, flows through the media stream machine 10, as described above, and leaves the exhaust gas turbocharger 1 by a
  • the rotor sleeve 23 is also conical and corresponds to the cone shape of the permanent magnet 22, so that the rotor sleeve 23 tapers in the flow direction.
  • the rotor sleeve radially surrounds the permanent magnet, so that it is encased by the rotor sleeve 23.
  • the rotor sleeve 23 supports the permanent magnet even at high speeds, so that its arrangement is secured in the exhaust gas turbocharger 1.
  • Parallel to the conical shape of the rotor sleeve 23 and the rotor 11 extends the inner sleeve 19, which is also cone-shaped.
  • the stator 12 is made of a plurality of stator blades 26, which abut each other axially and are disc-shaped.
  • the stator lamellae 26 each have a yoke section 27, which forms the stator yoke 14, and a stator tooth section 28, which forms the respective stator tooth 15 with adjacent stator tooth sections 28 of the stator lamellae 26.
  • Stator tooth portions 28 are of different lengths formed such that the distance between the Stator leopardabêten 28 to the rotor 11 is constant or nearly constant (in the flow direction). This ensures that, despite the conical shape of the permanent magnet 22 or of the rotor 11, an at least substantially constant media gap 16 remains in the flow direction.
  • the radial distance between inner sleeve 19 and outer sleeve 20 changes in the flow direction such that the flow cross-section of the flow channels 21 increases in the flow direction.
  • the radial distance LI is smaller than the radial distance L2 at the channel outlet 30 of the respective flow channel 21.
  • the cross section of the media-flow area of the media stream machine 10 changes over the active part length of the machine in
  • the cross section is increased in the flow direction. This results in a particularly early homogenization of the medium, so that the media stream machine 10 is particularly close to the
  • Compressor 4 is positionable in the housing 6, wherein also the stability of the rotor run is favored. Furthermore, the change in the flooded cross section in the flow direction leads to a change in the flow velocity, so that a desired speed profile can be achieved by a targeted change in the flow cross section. According to an alternative embodiment, not shown here, it is also conceivable, the flow cross-section in
  • the Outer sleeve 20 is conically shaped to achieve the cross-sectional change of the flow channels 21.

Abstract

The invention relates to an electric media flow machine (10) for a compressor (2) and/or a turbine (3), in particular a turbocharger (1) of an internal combustion engine, comprising a housing (6) having a media inlet (24) and a media outlet (25), comprising a shaft (5) mounted rotatably in the housing (6), comprising a rotor (11) arranged on the shaft (5) for conjoint rotation therewith, and comprising a stator (12), which is fixed to the housing and has a plurality of radially inwardly protruding stator teeth (15), comprising an inner sleeve (19) surrounding the rotor (11) circumferentially and an outer sleeve (20) arranged coaxially in relation to the rotor (11). Owing to the stator teeth (15) extending through the outer sleeve (20) at least as far as the inner sleeve (19), the inner sleeve (19) and the outer sleeve (20), a plurality of flow channels (21) leading through the stator (12) are formed as sole flow-through paths through the media flow machine (10) for the medium flowing from the media inlet (24) to the media outlet (25). The radial distance between the outer sleeve (20) and inner sleeve (19) and thus a flow-through cross section of the flow channels (21) changes over the axial extension of said channels.

Description

Beschreibung  description
Titel title
Elektrische Medienstrommaschine für einen Verdichter und/oder eine Turbine  Electric medium flow machine for a compressor and / or a turbine
Elektrische Medienstrommaschine für ein Verdichter und/oder eine Turbine, insbesondere eines Abgasturboladers einer Brennkraftmaschine, mit einem einen Medieneinlass und einen Medienauslass aufweisenden Gehäuse, mit einer in dem Gehäuse drehbar gelagerten Welle, mit einem drehfest an der Welle angeordneten Rotor und mit einem gehäusefesten Stator, der eine Electric medium-flow machine for a compressor and / or a turbine, in particular an exhaust gas turbocharger of an internal combustion engine, with a housing having a media inlet and a media outlet, with a rotatably mounted in the housing shaft, with a rotatably mounted on the shaft rotor and with a housing fixed stator, the one
Antriebswicklung und mehrere radial nach innen vorstehende Statorzähne aufweist, mit einer den Rotor umfangsseitig koaxial umgebenden Innenhülse und einer koaxial zum Rotor angeordneten Außenhülse, wobei durch die Having drive winding and a plurality of radially inwardly projecting stator teeth, with a coaxial surrounding the rotor inner sleeve and a coaxial with the rotor outer sleeve, wherein through the
beziehungsweise zwischen den sich durch die Außenhülse zumindest bis zur Innenhülse erstreckenden Statorzähne, die Innenhülse und die Außenhülse mehrere durch den Stator führende Strömungskanäle als einzige or between the stator teeth extending through the outer sleeve at least as far as the inner sleeve, the inner sleeve and the outer sleeve being the only ones which carry a plurality of flow channels through the stator
Durchströmungswege durch die Medienstrommaschine für das vom Flow paths through the media flow machine for the from
Medieneinlass zum Medienauslass strömende Medium gebildet sind. Media inlet to the media outlet flowing medium are formed.
Ferner betrifft die Erfindung ein Verdichter und/oder eine Turbine, insbesondere Abgasturbolader, mit einem Gehäuse und mit einer in dem Gehäuse drehbar gelagerten Welle, auf welcher zumindest ein Verdichterrad oder Turbinenrad drehfest angeordnet ist, und mit einer elektrischen Medienstrommaschine, die einen auf der Welle drehfest angeordneten Rotor und einen gehäusefesten Stator aufweist, wobei der Stator eine Antriebswicklung und mehrere radial nach innen vorstehende Statorzähne aufweist. Furthermore, the invention relates to a compressor and / or a turbine, in particular exhaust gas turbocharger, with a housing and with a rotatably mounted in the housing shaft on which at least one compressor or turbine wheel is rotatably mounted, and with an electric media stream machine, one on the shaft rotatably mounted rotor and a stator fixed to the stator, wherein the stator has a drive winding and a plurality of radially inwardly projecting stator teeth.
Stand der Technik State of the art
Medienstrommaschinen und Abgasturbolader der oben genannten Art sind aus dem Stand der Technik bereits bekannt. So offenbart beispielsweise die Media power machines and exhaust gas turbochargers of the above type are already known from the prior art. For example, the
Offenlegungsschrift DE 10 2014 210 451 Al einen Turbolader mit einer integrierten elektrischen Medienstrommaschine. Turbolader, insbesondere Abgasturbolader, werden insbesondere im Kraftfahrzeugbau dazu genutzt, die Luftfüllung in Zylindern einer Brennkraftmaschine zu erhöhen, um die Leistung der Brennkraftmaschine zu steigern. Häufig werden dazu Abgasturbolader eingesetzt, die vom Abgasstrom der Brennkraftmaschine angetrieben werden. Darüber hinaus ist es bekannt, einen Turbolader elektromotorisch zu Offenlegungsschrift DE 10 2014 210 451 Al a turbocharger with a integrated electric media stream machine. Turbochargers, in particular exhaust gas turbochargers, are used, in particular in motor vehicle construction, to increase the air charge in cylinders of an internal combustion engine in order to increase the power of the internal combustion engine. Frequently, exhaust gas turbochargers are used, which are driven by the exhaust gas flow of the internal combustion engine. In addition, it is known to electromotive a turbocharger
unterstützen, sodass unabhängig von einem Abgasstrom der support, so that regardless of an exhaust gas flow of
Brennkraftmaschine angesaugte Frischluft verdichtet und dem Internal combustion engine sucked fresh air compressed and the
Verbrennungsmotor mit erhöhtem Ladedruck zugeführt werden kann. Auch eine Kombination beider Varianten ist bereits bekannt. Dabei wird ein Internal combustion engine with increased boost pressure can be supplied. A combination of both variants is already known. This is a
Abgasturbolader mit einer elektrischen Maschine versehen, um die Welle des Abgasturboladers, auf welcher ein Verdichterrad sowie ein Turbinenrad drehfest angeordnet sind, anzutreiben. Hierdurch kann beispielsweise der ansonsten zeitlich verzögerte Ladedruckaufbau maßgeblich beschleunigt werden. Exhaust gas turbocharger provided with an electric machine to drive the shaft of the exhaust gas turbocharger, on which a compressor wheel and a turbine wheel are arranged rotationally fixed. As a result, for example, the otherwise delayed boost pressure buildup can be significantly accelerated.
Die Realisierung der elektromotorischen Unterstützung durch eine The realization of electromotive assistance by a
Medienstrommaschine hat den Vorteil, dass die motorische Unterstützung besonders bauraumsparend in den Turbolader integrierbar ist, weil die angesaugte Frischluft durch einen zwischen Rotor und Stator der Media flow machine has the advantage that the motor support can be integrated particularly space-saving in the turbocharger, because the sucked fresh air through a between rotor and stator of the
Medienstrommaschine gebildeten Medienspalt geführt wird. Damit ist die Medienstrommaschine in den Strömungsverlauf bauraumsparend integrierbar. Außerdem gibt sich dadurch der Vorteil, dass Rotor und Stator der Media stream machine formed media gap is performed. Thus, the media stream machine can be integrated in the flow path space-saving. In addition, there is the advantage that the rotor and stator of the
Medienstrommaschine durch den Luftstrom gekühlt werden. Medium flow machine to be cooled by the air flow.
Der Stator verfügt üblicherweise über ein kreisringförmiges Statorjoch sowie radial nach innen von dem Statorjoch vorstehende Statorzähne, die in The stator usually has an annular stator yoke and radially inwardly protruding from the stator yoke stator teeth, which in
Umfangsrichtung gesehen beabstandet voneinander gleichmäßig verteilt angeordnet sind. Die Statorzähne sind üblicherweise von einer mehrphasigen Antriebswicklung umwickelt, wobei durch Bestromen der Phasen der Seen circumferentially spaced from each other evenly distributed. The stator teeth are usually wrapped by a multi-phase drive winding, wherein by energizing the phases of the
Antriebswicklung mittels einer dafür vorgesehenen Leistungselektronik das drehende Antriebsmagnetfeld erzeugt wird, durch welches der durch die Welle drehbar gelagerte Rotor mit einem vorgebbaren Drehmoment angetrieben wird. Der Rotor weist dabei zweckmäßigerweise zumindest einen Drive winding by means of a dedicated power electronics, the rotating drive magnetic field is generated, through which the rotatably mounted by the shaft rotor is driven with a predetermined torque. The rotor expediently has at least one
Permanentmagneten auf, der mit dem drehenden Magnetfeld zusammenwirkt. Aus der oben bereits genannten Offenlegungsschrift ist es außerdem bekannt, eine Einrichtung vorzusehen, welche zur Strömungsoptimierung dient und dazu den Statorzähnen, die in den Medienspalt zwischen Rotor und Stator Permanent magnet, which cooperates with the rotating magnetic field. From the above-mentioned published patent application, it is also known to provide a device which is used for flow optimization and to the stator teeth in the media gap between the rotor and stator
hineinragen, und an welchen das zu fördernde Medium vorbeiströmt, ein strömungsoptimiertes Profil, insbesondere ein tropfenförmiges Profil verleiht. protrude, and at which the medium to be conveyed flows past, gives a flow-optimized profile, in particular a teardrop-shaped profile.
Aus der noch nicht veröffentlichten Patentanmeldung DE 10 2017 207 532 ist es außerdem bekannt, den Medienstrom nicht durch den Medienspalt zwischen den Statorzähnen und dem Rotor zu führen, sondern durch den Stator hindurch.From the not yet published patent application DE 10 2017 207 532 it is also known not to guide the media flow through the media gap between the stator teeth and the rotor, but through the stator.
Dazu sind im Stator eine den Rotor umschließende und statorfest angeordnete Innenhülse sowie eine koaxial dazu angeordnete, die Innenhülse einschließende, Außenhülse, vorhanden, die zusammen mit den Statorzähnen mehrere For this purpose, in the stator surrounding the rotor and statorfest arranged inner sleeve and a coaxially arranged, the inner sleeve enclosing, outer sleeve, present, which together with the stator teeth more
Strömungskanäle durch den Stator hindurch formen. Die Strömungskanäle werden dabei seitlich durch Außenhülse, Innenhülse und die sich durch die Außenhülse hindurch zumindest bis zu der Innenhülse, gegebenenfalls auch durch die Innenhülse hindurch erstreckenden Statorzähne begrenzt. Optional ist stromaufwärts des Rotors außerdem eine Abdeckkappe angeordnet, die in die Innenhülse übergeht, oder die Innenhülse erstreckt sich stromaufwärts des Rotors auch stirnseitig mit dem Rotor, um ein Eindringen von Medium in den Medienspalt, der radial zwischen den Statorzähnen und dem Rotor vorliegt, zu verhindern. Form flow channels through the stator. The flow channels are bounded laterally by outer sleeve, inner sleeve and the through the outer sleeve at least up to the inner sleeve, possibly also through the inner sleeve extending therethrough stator teeth. Optionally, upstream of the rotor, a cap is also disposed which merges into the inner sleeve, or the inner sleeve extends upstream of the rotor also frontally with the rotor, to penetration of medium into the media gap, which is present radially between the stator teeth and the rotor prevent.
Offenbarung der Erfindung Disclosure of the invention
Die elektrische Medienstrommaschine mit den Merkmalen des Anspruchs 1 hat den Vorteil, dass eine vorteilhafte Ausbildung des Mediums in dem Verdichter oder der Turbine vorliegt, weil die Gestalt der Medienstrommaschine zu einer frühen Homogenisierung des durchströmenden Mediums führt. Dadurch ist die Medienstrommaschine näher zu dem Verdichterrad oder Turbinenrad hin positionierbar, wodurch die Stabilität des Rotorlaufs der Medienstrommaschine begünstigt wird. Durch die gezielte Veränderung des durchströmten Querschnitts der Strömungskanäle in Strömungsrichtung wird außerdem die The electric medium flow machine with the features of claim 1 has the advantage that an advantageous embodiment of the medium in the compressor or the turbine is present, because the shape of the media flow machine leads to an early homogenization of the medium flowing through. As a result, the media flow machine can be positioned closer to the compressor wheel or turbine wheel, whereby the stability of the rotor run of the media flow machine is favored. Due to the targeted change of the flow-through cross-section of the flow channels in the flow direction is also the
Strömungsgeschwindigkeit des Mediums beeinflusst, sodass der Betrieb des Verdichters und/oder der Turbine weiter optimierbar ist. Erfindungsgemäß ist hierzu vorgesehen, dass sich der radiale Abstand zwischen Außenhülse und Innenhülse in ihrer Axialerstreckung verändert. Der radial Abstand zwischen Außenhülse und Innenhülse und damit der Durchströmungsquerschnitt des jeweiligen Strömungskanals verändert sich somit in Strömungsrichtung des Mediums. Flow rate of the medium influenced so that the operation of the compressor and / or the turbine can be further optimized. According to the invention, it is provided that the radial distance between outer sleeve and inner sleeve changes in its axial extension. The radial distance between Outer sleeve and inner sleeve and thus the flow cross section of the respective flow channel thus changes in the flow direction of the medium.
Gemäß einer bevorzugten Weiterbildung der Erfindung vergrößert sich der Abstand zwischen Außenhülse und Innenhülse und damit der jeweilige According to a preferred embodiment of the invention, the distance between the outer sleeve and inner sleeve and thus increases the respective
Durchströmungsquerschnitt der Strömungskanäle in Strömungsrichtung des Mediums, das von dem Medieneinlass durch die Medienstrommaschine zu dem Medienauslass strömt. Das Medium, das normalerweise vom Medieneinlass zu dem Medienauslass strömt, gibt somit die Strömungsrichtung vor. Entlang dieser Strömungsrichtung vergrößert sich nun der Abstand zwischen Außenhülse und Innenhülse, sodass mit zunehmendem Strömungsweg der Querschnitt des Strömungsvolumens ebenfalls zunimmt. Dadurch wird die Flow cross-section of the flow channels in the flow direction of the medium, which flows from the media inlet through the media flow machine to the media outlet. The medium that normally flows from the media inlet to the media outlet thus dictates the direction of flow. Along this direction of flow, the distance between outer sleeve and inner sleeve now increases, so that the cross section of the flow volume also increases as the flow path increases. This will be the
Strömungsgeschwindigkeit des Mediums reduziert und eine frühzeitige Flow rate of the medium is reduced and an early
Homogenisierung des Mediums, insbesondere stromaufwärts des Verdichterrads erreicht. Homogenization of the medium, in particular achieved upstream of the compressor wheel.
Bevorzugt ist die Innenhülse konusförmig ausgebildet. Dadurch ergibt sich eine einfache Querschnittsveränderung entlang des Strömungswegs, wenn die Außenhülse nicht die gleiche Konusform wie die Innenhülse aufweist. Hierdurch ist in einfacher und kostengünstiger Art und Weise der sich verändernde Preferably, the inner sleeve is cone-shaped. This results in a simple change in cross section along the flow path when the outer sleeve does not have the same cone shape as the inner sleeve. This is in a simple and cost-effective way of changing
Querschnitt in Strömungsrichtung realisierbar. Cross-section in the flow direction feasible.
Bevorzugt ist die Außenhülse zylinderförmig ausgebildet. Damit verläuft die Mantelwand der Außenhülse axial parallel zur Rotationsachse des Rotors. Damit ergibt sich die Querschnittsveränderung allein durch die konisch geformte Innenhülse und optional durch eine Veränderung der Breite der Statorzähne in radialer Richtung. Die zylinderförmige Außenhülse hat den Vorteil, dass die Antriebswicklung vollständig außerhalb des Strömungskanals liegt und durch die Außenhülse vor dem Medium geschützt ist. Dabei reicht die Antriebswicklung bevorzugt bis an die Außenhülse heran und gewährleistet somit in Preferably, the outer sleeve is cylindrical. Thus, the jacket wall of the outer sleeve extends axially parallel to the axis of rotation of the rotor. This results in the change in cross section solely by the conically shaped inner sleeve and optionally by a change in the width of the stator teeth in the radial direction. The cylindrical outer sleeve has the advantage that the drive winding is completely outside the flow channel and is protected by the outer sleeve from the medium. In this case, the drive winding preferably reaches up to the outer sleeve and thus ensures in
Axialerstreckung, dass zwischen Außenhülse und Antriebswicklung stets der gleiche Abstand besteht und die Antriebswicklung wie üblich herstellbar ist. Axial extent that between outer sleeve and drive winding is always the same distance and the drive winding is produced as usual.
Gemäß einer alternativen Ausführungsform ist die Außenhülse konisch ausgebildet, um den Strömungsquerschnitt der Strömungskanäle zu verändern, wobei dann die Innenhülse bevorzugt zylinderförmig ausgebildet ist. In diesem Fall ist das Prinzip also umgekehrt. Hierbei ergibt sich der Vorteil eines zylindrischen und damit einfach gestalteten Rotors. According to an alternative embodiment, the outer sleeve is conical in order to change the flow cross-section of the flow channels, wherein then the inner sleeve is preferably cylindrical. In this case, the principle is reversed. This results in the advantage of a cylindrical and thus simply designed rotor.
Insbesondere dann, wenn die Innenhülse konisch ausgebildet ist, ist bevorzugt auch der Rotor, der in der Innenhülse liegt, konusförmig ausgebildet, sodass dieser insbesondere den Innenraum der Innenhülse vollständig ausfüllt und dadurch eine maximale Effizienz der Medienstrommaschine gewährleistet. In particular, when the inner sleeve is conical, preferably also the rotor, which is located in the inner sleeve, formed conical, so that in particular completely fills the interior of the inner sleeve, thereby ensuring maximum efficiency of the media stream machine.
Bevorzugt weist der Rotor dazu mindestens einen konusförmigen Preferably, the rotor has at least one cone-shaped
Permanentmagneten auf. Die Konusform ist dabei insbesondere stets derart ausgerichtet, dass der Konus der Innenhülse und insbesondere auch der des Rotors in Strömungsrichtung spitz zulaufen. Hierdurch wird die Vergrößerung der Strömungskanäle in Strömungsrichtung gewährleistet. Ist der Konus an der Außenhülse ausgebildet, so weist die Spitze des Konus entgegen der Permanent magnets on. In particular, the cone shape is always oriented in such a way that the cone of the inner sleeve, and in particular that of the rotor, tapers in the flow direction. As a result, the enlargement of the flow channels is ensured in the flow direction. If the cone is formed on the outer sleeve, then the tip of the cone faces the
Strömungsrichtung, um die Vergrößerung des Strömungskanals in Flow direction to increase the flow channel in
Strömungsrichtung zu erreichen. To achieve flow direction.
Gemäß einer bevorzugten Weiterbildung der Erfindung nimmt die radiale Länge der Statorzähne in Strömungsrichtung des Mediums zu, insbesondere derart, dass ein radialer Abstand zwischen Statorzähnen und Permanentmagnete in Strömungsrichtung konstant oder nahezu konstant ist. Aufgrund der Konusform, insbesondere des Rotors, ergibt sich, dass die Radialerstreckung des According to a preferred embodiment of the invention, the radial length of the stator teeth increases in the flow direction of the medium, in particular such that a radial distance between the stator teeth and permanent magnets in the flow direction is constant or nearly constant. Due to the cone shape, in particular of the rotor, it follows that the radial extent of the
Permanentmagneten beziehungsweise des Rotors sich in Strömungsrichtung verändert. Um zu vermeiden, dass dadurch in Axialrichtung unterschiedliche Magnetkräfte zwischen Rotor und Stator wirken, werden die Statorzähne der Form des Rotors radial in Strömungsrichtung gesehen nachgeführt. Damit weisen die Statorzähne am Austritt des Strömungskanals eine größere Permanent magnet or the rotor changes in the flow direction. In order to avoid that in the axial direction different magnetic forces between the rotor and stator act, the stator teeth are tracked the shape of the rotor seen radially in the flow direction. Thus, the stator teeth at the outlet of the flow channel have a larger
Radialerstreckung auf als am Eintritt des jeweiligen Strömungskanals, wenn der Rotor konusförmig ausgebildet ist, sodass sich der Abstand zwischen Radial extent on than at the inlet of the respective flow channel, when the rotor is cone-shaped, so that the distance between
Außenhülse und Innenhülse wie zuvor beschrieben vergrößert. Durch dieses Nachführen der Statorzähne wird weiterhin ein vorteilhafter Betrieb der elektrischen Medienstrommaschine gewährleistet. Insbesondere ist dazu der radiale Abstand zwischen Statorzähnen und Permanentmagneten konstant oder nahezu konstant, in Längserstreckung beziehungsweise Strömungsrichtung gesehen, gewählt. Gemäß einer bevorzugten Weiterbildung der Erfindung weist der Stator mehrere axial aneinander anliegende Statorlamellen auf, wobei die die Stator bildenden radial vorstehenden Statorzahnabschnitte der Statorlamellen in Outer sleeve and inner sleeve enlarged as described above. By this tracking of the stator teeth an advantageous operation of the electric media stream machine is further ensured. In particular, the radial distance between the stator teeth and permanent magnets is constant or nearly constant, seen in the longitudinal direction or flow direction selected. According to a preferred development of the invention, the stator has a plurality of axially abutting stator lamellae, the stator-forming radially projecting stator tooth sections of the stator lamellae in FIG
Strömungsrichtung unterschiedlich lang ausgebildet sind. Der Stator der Flow direction are formed differently long. The stator of the
Medienstrommaschine ist also bevorzugt ein Lamellenstator. Dieser zeichnet sich dadurch aus, dass eine Vielzahl von Statorlamellen, die im Wesentlichen ringscheibenförmig ausgebildet sind, axial aneinander angelegt werden, um den Gesamtstator zu bilden. Jede Statorlamelle weist dabei einen Media stream machine is therefore preferably a slat stator. This is characterized in that a plurality of stator blades, which are formed substantially annular disk-shaped, are axially abutting each other to form the total stator. Each stator blade has one
Statorzahnabschnitt auf, der radial nach innen vorsteht, um im Gesamtgefüge mit benachbarten Statorzahnabschnitten jeweils einen Statorzahn zu bilden. Statorzahnabschnitt which projects radially inwardly to form a stator tooth in the overall structure with adjacent Statorzahnabschnitten respectively.
Dadurch, dass die Statorzahnabschnitte unterschiedlich lang ausgebildet sind, ist die radiale Nachführung der Statorzähne in Strömungsrichtung an den insbesondere konisch ausgebildeten Permanentmagneten in einfacher und kostengünstiger Art und Weise realisierbar. Dadurch ergibt sich ein  Characterized in that the stator tooth sections are formed differently long, the radial tracking of the stator teeth in the flow direction of the particular conical permanent magnets in a simple and inexpensive manner can be realized. This results in a
stufenförmiger Verlauf der Statorzahnspitzen, wodurch ein nahezu konstanter Abstand zwischen Statorzahn und Permanentmagnet in Strömungsrichtung gewährleistet ist. Die spulenumwickelten Statorzahnabschnitte beziehungsweise Jochabschnitte des Stators sind bevorzugt über die axiale Länge in den stepped course of the Statorzahnspitzen, whereby a nearly constant distance between the stator tooth and permanent magnet is ensured in the flow direction. The coil-wound stator tooth sections or yoke sections of the stator are preferably over the axial length in the
Statorlamellen bei zylindrischer Außenhülse identisch ausgeführt. Stator blades with cylindrical outer sleeve identical.
Weiterhin ist bevorzugt vorgesehen, dass der Rotor eine dem Furthermore, it is preferably provided that the rotor is a the
Permanentmagneten umfassende und drehfest mit dem Rotor verbundene Rotorhülse aufweist. Die Rotorhülse schützt den Permanentmagneten vor dem Medium und sichert gleichzeitig die Lage des Permanentmagneten an dem Rotor, indem die Rotorhülse den Permanentmagneten eine radiale Anlagefläche bietet, die auch bei hohen Drehzahlen den Permanentmagneten sicher lagert. Permanent magnet comprehensive and rotatably connected to the rotor rotor sleeve. The rotor sleeve protects the permanent magnet from the medium and at the same time secures the position of the permanent magnet on the rotor, in that the rotor sleeve provides the permanent magnets with a radial contact surface which securely supports the permanent magnet even at high rotational speeds.
Die erfindungsgemäße Turbine und/oder der erfindungsgemäße Verdichter zeichnen sich durch die erfindungsgemäße Ausbildung der The turbine according to the invention and / or the compressor according to the invention are characterized by the inventive design of
Medienstrommaschine aus. Es ergeben sich hierdurch die bereits genannten Vorteile. Medieneinlass und Medienauslass sind dabei insbesondere Bestandteil des Gehäuses von Turbine und/oder Verdichter. Die Medienstrommaschine selbst ist bevorzugt gehäuselos in dem Strömungskanal des Gehäuses der Turbine beziehungsweise des Verdichters angeordnet, sodass das Gehäuse von Turbine und/oder Verdichter das Gehäuse der Medienstrommaschine (mit-)bildet. Weitere Vorteile und bevorzugte Merkmale und Merkmalskombinationen ergeben sich insbesondere aus dem zuvor Beschriebenen sowie aus den Ansprüchen. Im Folgenden soll die Erfindung anhand der Zeichnung näher erläutert werden.Media stream machine off. This results in the already mentioned advantages. Media inlet and media outlet are in particular part of the housing of the turbine and / or compressor. The media flow machine itself is preferably arranged without a housing in the flow channel of the housing of the turbine or of the compressor, so that the housing of the turbine and / or compressor forms the housing of the media flow machine. Further advantages and preferred features and combinations of features emerge in particular from the previously described and from the claims. In the following, the invention will be explained in more detail with reference to the drawing.
Dazu zeigen Show this
Figur 1 einen Abgasturbolader mit einer vorteilhaften Medienstrommaschine, 1 shows an exhaust gas turbocharger with an advantageous media stream machine,
Figur 2 eine axiale Draufsicht auf die Medienstrommaschine und Figure 2 is an axial plan view of the media flow machine and
Figur 3 eine vereinfachte Schnittdarstellung durch die Medienstrommaschine. Figure 3 is a simplified sectional view through the media stream machine.
Figur 1 zeigt in einer vereinfachten Längsschnittdarstellung einen FIG. 1 shows in a simplified longitudinal sectional view a
Abgasturbolader 1, der einen Verdichter 2 sowie eine Turbine 3 aufweist. Der Verdichter 2 weist ein Verdichterrad 4 auf, das auf einer Welle 5 drehfest angeordnet ist. Die Welle 5 ist selbst drehbar in einem Gehäuse 6 des Exhaust gas turbocharger 1, which has a compressor 2 and a turbine 3. The compressor 2 has a compressor wheel 4, which is arranged rotatably on a shaft 5. The shaft 5 is itself rotatable in a housing 6 of the
Abgasturboladers 1 gelagert. An einem von dem Verdichterrad 4 abgewandten Ende der Welle 5 ist außerdem ein Turbinenrad 7 der Turbine 3 drehfest mit der Welle 5 verbunden. Wenn das Turbinenrad 7 vom Abgas einer Exhaust gas turbocharger 1 stored. In addition, at a side remote from the compressor 4 end of the shaft 5, a turbine 7 of the turbine 3 is rotatably connected to the shaft 5. When the turbine 7 from the exhaust of a
Brennkraftmaschine angeströmt und dadurch angetrieben wird, wird damit das Verdichterrad 4 ebenfalls in eine Drehbewegung versetzt, sodass dem Internal combustion engine is flown and thereby driven, so that the compressor 4 is also placed in a rotary motion, so that the
Verdichterrad 4 zugeführte Frischluft verdichtet und der Brennkraftmaschine zugeführt wird. Compressor 4 compressed fresh air supplied and the internal combustion engine is supplied.
Die drehbare Lagerung der Welle 5 in dem Gehäuse 6 kann auf unterschiedliche Arten realisiert werden. Gemäß einem ersten Ausführungsbeispiel ist The rotatable mounting of the shaft 5 in the housing 6 can be realized in different ways. According to a first embodiment
vorgesehen, dass die Welle 5 durch wenigstens zwei Lager 8 und 9 in dem Gehäuse 6 drehbar gelagert ist. Vorzugsweise sind als Lager 8,9 zwei provided that the shaft 5 is rotatably supported by at least two bearings 8 and 9 in the housing 6. Preferably, as a bearing are 8.9 two
Wälzkörperlager vorhanden. Zur axialen Lagerung der Welle 5 kann auch vorgesehen sein, dass eines der Wälzkörperlager als Axialwälzkörperlager ausgebildet ist. Rolling element bearing available. For the axial bearing of the shaft 5 can also be provided that one of the rolling element bearing is designed as Axialwälzkörperlager.
Alternativ und gemäß dem in Figur 1 gezeigten Ausführungsbeispiel ist vorgesehen, dass das Lager 8 als Magnetlager ausgebildet ist, und das Lager 9, das als Axiallager dient, als Wälzkörperlager. Damit insbesondere der Verdichter 2 unabhängig vom Abgasstrom der Alternatively and according to the embodiment shown in Figure 1 it is provided that the bearing 8 is designed as a magnetic bearing, and the bearing 9, which serves as a thrust bearing, as Wälzkörperlager. Thus, in particular, the compressor 2 regardless of the exhaust stream of
Brennkraftmaschine antreibbar ist, sodass jederzeit eine hohe Zylinderluftfüllung in den Zylindern der Brennkraftmaschine erreicht werden kann, ist vorliegend außerdem vorgesehen, dass der Abgasturbolader 1 eine elektrische Internal combustion engine can be driven, so that at any time a high cylinder air filling in the cylinders of the internal combustion engine can be achieved, is presently also provided that the exhaust gas turbocharger 1, an electric
Medienstrommaschine 10 aufweist. Diese ist vorliegend in den Verdichter 2 integriert, wobei ein Rotor 11 der Medienstrommaschine 10 drehfest auf dem von dem Turbinenrad 7 abgewandten Ende der Welle 5 angeordnet ist. Ein mit dem Rotor 11 zusammenwirkender Stator 12 ist koaxial zu dem Rotor 11 gehäusefest in dem zu dem Verdichterrad 4 führenden Strömungskanal 13 des Media stream machine 10 has. This is presently integrated into the compressor 2, wherein a rotor 11 of the media flow machine 10 is rotatably mounted on the end remote from the turbine 7 end of the shaft 5. A cooperating with the rotor 11 stator 12 is fixed to the housing fixed in the leading to the compressor impeller 4 flow channel 13 of the coaxial with the rotor 11
Abgasturboladers 1 angeordnet. Exhaust gas turbocharger 1 is arranged.
Figur 2 zeigt eine vereinfachte Draufsicht auf die Medienstrommaschine 10. Der Stator 12 weist ein kreisringförmiges Statorjoch 14 auf, von welchem mehrere gleichmäßig über den Umfang des Statorjochs 14 verteilt angeordnete FIG. 2 shows a simplified plan view of the media flow machine 10. The stator 12 has an annular stator yoke 14, of which several are distributed uniformly over the circumference of the stator yoke 14
Statorzähne 15 radial nach innen vorstehen und in Richtung des Rotors 11 weisen. Die Statorzähne 15 enden radial beabstandet zu dem Rotor 11, sodass zwischen den Statorzähnen 15 und dem Rotor 11 jeweils ein axialer Luftspalt 16 verbleibt. Stator teeth 15 protrude radially inwardly and point in the direction of the rotor 11. The stator teeth 15 end radially spaced from the rotor 11, so that between the stator teeth 15 and the rotor 11 each have an axial air gap 16 remains.
Der Stator 12 ist mit einer insbesondere mehrphasigen Antriebswicklung 17 versehen, wie beispielsweise auch in Figur 1 gezeigt. Die Antriebswicklung 17 kann als eine über den Stator gewickelte Wicklung oder eine radial auf die Statorzähne 15 aufgesteckte Wicklung, insbesondere bestehend aus mehreren Spulen, ausgebildet sein, wobei auf jeden Statorzahn wenigstens eine Spule aufgeschoben ist, wie beispielsweise in der noch nicht veröffentlichten The stator 12 is provided with an in particular multi-phase drive winding 17, as shown for example in FIG. The drive winding 17 may be formed as a wound over the stator winding or a radially plugged onto the stator teeth 15 winding, in particular consisting of a plurality of coils, wherein on each stator tooth at least one coil is pushed, such as in the not yet published
Patentanmeldung DE 10 2017 207 532 beschrieben. Patent Application DE 10 2017 207 532 described.
Die Medienstrommaschine 10 weist weiterhin eine Einrichtung 18 auf, die dazu ausgebildet ist, das Strömungsverhalten des von dem Abgasturboladers 1 geförderten Mediums, also insbesondere der Frischluft, durch die The media stream machine 10 further comprises a device 18, which is adapted to the flow behavior of the conveyed by the exhaust gas turbocharger 1 medium, ie in particular the fresh air, through the
Medienstrommaschine 10 hindurch zu optimieren. Dazu weist die Einrichtung 18 eine dem Rotor 11 zugeordnete Innenhülse 19 auf, deren Innendurchmesser größer ist als der Rotor 11, sodass dieser in der Innenhülse 19 aufgenommen ist, wie beispielsweise in Figur 2 gezeigt, und berührungsfrei in dieser liegt, sodass der Rotor 11 verschleißfrei innerhalb der Innenhülse 19 rotieren kann. Die Innenhülse 19 ist an dem Stator 12 befestigt, sodass die Innenhülse 19 gehäusefest vorliegt. Media stream machine 10 through optimize. For this purpose, the device 18 has an inner sleeve 19 assigned to the rotor 11, whose inner diameter is larger than the rotor 11, so that it is accommodated in the inner sleeve 19, as shown for example in FIG. 2, and lies without contact in this, so that the rotor 11 is wear-free can rotate within the inner sleeve 19. The Inner sleeve 19 is fixed to the stator 12, so that the inner sleeve 19 is fixed to the housing.
Die Einrichtung 18 weist weiterhin eine Außenhülse 20 auf, die koaxial zum Rotor 11 beziehungsweise zur Drehachse der Welle 5 angeordnet ist und einen Innendurchmesser aufweist, der größer ist als der Außendurchmesser der Innenhülse 19, sodass die Außenhülse 20 radial nach außen beabstandet zu der Innenhülse 19 an dem Stator 12, insbesondere an den Statorzähnen 15 befestigt ist. The device 18 further has an outer sleeve 20, which is arranged coaxially to the rotor 11 or to the axis of rotation of the shaft 5 and has an inner diameter which is greater than the outer diameter of the inner sleeve 19, so that the outer sleeve 20 radially outwardly spaced from the inner sleeve 19th is attached to the stator 12, in particular to the stator teeth 15.
Insbesondere verlaufen von der Innenhülse 19 zu der Außenhülse 20 radiale Haltestreben, die jeweils einstückig mit Innenhülse 19 und Außenhülse 20 verbunden sind, wobei die Haltestreben insbesondere korrespondierend zu den Statorzähnen 15 angeordnet und ausgebildet sind, sodass die Haltestreben entsprechend der Verteilung der Statorzähne 15 angeordnet sind und in der Endmontageposition jeweils einen der Statorzähne 15 zumindest im Bereich der Strömungskanäle 21, insbesondere stromaufwärts, axial überdecken. In particular, extending from the inner sleeve 19 to the outer sleeve 20 radial support struts, which are each integrally connected to inner sleeve 19 and outer sleeve 20, wherein the retaining struts are arranged and formed in particular corresponding to the stator teeth 15, so that the support struts are arranged according to the distribution of the stator teeth 15 and in the final assembly position each axially overlap one of the stator teeth 15, at least in the region of the flow channels 21, in particular upstream.
Vorzugsweise weisen die Haltestreben dabei ein strömungsoptimiertes Profil auf, um das Medium möglichst druckverlustarm an den Statorzähnen 15 Preferably, the retaining struts have a flow-optimized profile in order to minimize the pressure medium on the stator teeth 15
vorbeizuführen. passing out.
Der Außenring 20 weist ein Außendurchmesser auf, der kleiner als der The outer ring 20 has an outer diameter which is smaller than the
Innendurchmesser des Statorjochs 14, sodass zwischen Außenring 20 und Statorjoch 14 Freiräume zwischen den benachbarten Statorzähnen 15 bestehen, in welchen die Statorwicklung 17 angeordnet oder ausgebildet ist. Durch die Außenhülse 20 ist die Antriebswicklung 17 vor dem Medium geschützt, wird aber dennoch über die Hülse gekühlt. Inner diameter of the stator yoke 14 so that between the outer ring 20 and stator yoke 14 free spaces between the adjacent stator teeth 15, in which the stator winding 17 is arranged or formed. By the outer sleeve 20, the drive winding 17 is protected from the medium, but is still cooled over the sleeve.
Die Statorzähne 15 erstrecken sich durch die Außenhülse 20 hindurch bis zu der Innenhülse 19, sodass zwischen Innenhülse 19, Statorzähnen 15 und The stator teeth 15 extend through the outer sleeve 20 through to the inner sleeve 19, so that between inner sleeve 19, stator teeth 15 and
Außenhülse 20 mehrere Strömungskanäle 21 gebildet sind, durch welche das Medium durch die Medienstrommaschine 10 hindurchströmt. Die Outer sleeve 20 a plurality of flow channels 21 are formed through which the medium flows through the media flow machine 10. The
Strömungskanäle 21 bilden insbesondere die einzigen Strömungswege, durch welche das Medium die Medienstrommaschine 10 durchdringen kann. Flow channels 21 in particular form the only flow paths through which the medium can penetrate the media flow machine 10.
Vorzugsweise ist dazu dem Rotor 11 eine Abdeckkappe stromaufwärts zugeordnet, welche den Rotor 11 stromaufwärts überdeckt und insbesondere strömungsoptimiert ausgebildet ist, um das Medium in die Strömungskanäle 21 zu lenken. Preferably, the rotor 11 is associated with a cover cap upstream, which covers the rotor 11 upstream and in particular designed flow optimized to direct the medium into the flow channels 21.
Im Unterschied zu herkömmlichen Medienspaltmaschinen liegt der Medienweg somit nicht radial zwischen Statorzahn und Rotor, sondern wird durch die Strömungskanäle 21 in dem Stator 12 selbst bereitgestellt, sodass das Medium vollständig durch den Stator 12 hindurchströmt. Hierdurch erfolgt eine besonders vorteilhafte Statorkühlung und das Ablagern von magnetischen und/oder magnetisierbaren Partikeln auf dem Rotor wird verhindert oder zumindest im Wesentlichen vermieden. In contrast to conventional media splitting machines, the media path thus does not lie radially between the stator tooth and the rotor, but is provided by the flow channels 21 in the stator 12 itself, so that the medium flows completely through the stator 12. This results in a particularly advantageous stator cooling and the deposition of magnetic and / or magnetizable particles on the rotor is prevented or at least substantially avoided.
Gemäß dem vorliegenden Ausführungsbeispiel ist die Außenhülse 20 zylinderförmig ausgebildet, sodass sie sich insgesamt koaxial beziehungsweise in Strömungsrichtung parallel zur Drehachse der Welle 5 oder des Rotors 11 erstreckt, wie insbesondere in Figur 1 ersichtlich. According to the present embodiment, the outer sleeve 20 is cylindrical, so that it extends in total coaxially or in the flow direction parallel to the axis of rotation of the shaft 5 or the rotor 11, as shown in particular in FIG.
Figur 3 zeigt hierzu in einer perspektivischen Längsschnittdarstellung die Medienstrommaschine 10 in einer Detailansicht. FIG. 3 shows, in a perspective longitudinal section, the media stream machine 10 in a detailed view.
Der Rotor 11 weist einen Permanentmagneten 22 auf, der in einer Rotorhülse 23 einliegt. Der Permanentmagnet 22 ist dabei konusförmig ausgebildet, wobei die Spitze der Konusform in Strömungsrichtung des Mediums liegt, wie durch einen Pfeil gezeigt. Das Medium strömt durch einen Medieneinlass 24 des Gehäuses 6 in den Abgasturbolader 1 ein, durchströmt die Medienstrommaschine 10, wie zuvor beschrieben, und verlässt den Abgasturbolader 1 durch einen The rotor 11 has a permanent magnet 22, which rests in a rotor sleeve 23. The permanent magnet 22 is designed conical, wherein the tip of the cone shape is in the flow direction of the medium, as shown by an arrow. The medium flows through a media inlet 24 of the housing 6 into the exhaust gas turbocharger 1, flows through the media stream machine 10, as described above, and leaves the exhaust gas turbocharger 1 by a
Medienauslass 25 des Gehäuses 6 stromabwärts des Verdichters 2, wobei der Medienauslass 25 hier in Figur 1 nur angedeutet ist. Media outlet 25 of the housing 6 downstream of the compressor 2, wherein the media outlet 25 is indicated here in Figure 1 only.
Die Rotorhülse 23 ist ebenfalls konisch ausgebildet und entspricht dabei der Konusform des Permanentmagneten 22, sodass auch die Rotorhülse 23 in Strömungsrichtung spitz zuläuft. Die Rotorhülse umgibt den Permanentmagneten radial, sodass dieser von der Rotorhülse 23 ummantelt ist. Die Rotorhülse 23 stützt dabei den Permanentmagneten auch bei hohen Drehzahlen, sodass dessen Anordnung in dem Abgasturbolader 1 gesichert ist. Parallel zu der Konusform der Rotorhülse 23 beziehungsweise des Rotors 11 verläuft die Innenhülse 19, die ebenfalls konusförmig ausgebildet ist. The rotor sleeve 23 is also conical and corresponds to the cone shape of the permanent magnet 22, so that the rotor sleeve 23 tapers in the flow direction. The rotor sleeve radially surrounds the permanent magnet, so that it is encased by the rotor sleeve 23. The rotor sleeve 23 supports the permanent magnet even at high speeds, so that its arrangement is secured in the exhaust gas turbocharger 1. Parallel to the conical shape of the rotor sleeve 23 and the rotor 11 extends the inner sleeve 19, which is also cone-shaped.
Der Stator 12 ist aus einer Vielzahl von Statorlamellen 26 gefertigt, die axial aneinander anliegen und scheibenförmig ausgebildet sind. Die Statorlamellen 26 weisen dabei jeweils einen Jochabschnitt 27 auf, der das Statorjoch 14 bildet, sowie einen Statorzahnabschnitt 28, der mit benachbarten Statorzahnabschnitten 28 der Statorlamellen 26 den jeweiligen Statorzahn 15 bildet. Die The stator 12 is made of a plurality of stator blades 26, which abut each other axially and are disc-shaped. The stator lamellae 26 each have a yoke section 27, which forms the stator yoke 14, and a stator tooth section 28, which forms the respective stator tooth 15 with adjacent stator tooth sections 28 of the stator lamellae 26. The
Statorzahnabschnitte 28 sind unterschiedlich lang derart ausgebildet, dass der Abstand zwischen den Statorzahnabschnitten 28 zu dem Rotor 11 konstant oder nahezu konstant ist (in Strömungsrichtung). Damit ist gewährleistet, dass trotz der konischen Form des Permanentmagneten 22 beziehungsweise des Rotors 11 ein in Strömungsrichtung zumindest im Wesentlichen gleichbleibender Medienspalt 16 verbleibt. Stator tooth portions 28 are of different lengths formed such that the distance between the Statorzahnabschnitten 28 to the rotor 11 is constant or nearly constant (in the flow direction). This ensures that, despite the conical shape of the permanent magnet 22 or of the rotor 11, an at least substantially constant media gap 16 remains in the flow direction.
Weil die Außenhülse 20, wie zuvor bereits erwähnt, zylinderförmig ausgebildet ist, verändert sich der radiale Abstand zwischen Innenhülse 19 und Außenhülse 20 in Strömungsrichtung derart, dass der Durchströmungsquerschnitt der Strömungskanäle 21 in Strömungsrichtung zunimmt. Am Kanaleintritt 29 ist der radiale Abstand LI kleiner als der radiale Abstand L2 am Kanalaustritt 30 des jeweiligen Strömungskanals 21. Because the outer sleeve 20, as already mentioned, is cylindrical, the radial distance between inner sleeve 19 and outer sleeve 20 changes in the flow direction such that the flow cross-section of the flow channels 21 increases in the flow direction. At the channel inlet 29, the radial distance LI is smaller than the radial distance L2 at the channel outlet 30 of the respective flow channel 21.
Damit verändert sich der Querschnitt des mediendurchflossenen Bereichs der Medienstrommaschine 10 über die Aktivteil länge der Maschine in Thus, the cross section of the media-flow area of the media stream machine 10 changes over the active part length of the machine in
Strömungsrichtung, wobei vorliegend der Querschnitt in Strömungsrichtung vergrößert wird. Dadurch erfolgt eine besonders frühe Homogenisierung des Mediums, sodass die Medienstrommaschine 10 besonders nahe zu dem Flow direction, in the present case, the cross section is increased in the flow direction. This results in a particularly early homogenization of the medium, so that the media stream machine 10 is particularly close to the
Verdichterrad 4 in dem Gehäuse 6 positionierbar ist, wobei außerdem auch die Stabilität des Rotorlaufs begünstigt wird. Des Weiteren führt die Veränderung des durchfluteten Querschnitts in Strömungsrichtung zu einer Veränderung der Strömungsgeschwindigkeit, sodass durch eine gezielte Veränderung des Durchströmungsquerschnitts ein gewünschter Geschwindigkeitsverlauf realisierbar ist. Gemäß einem alternativen Ausführungsbeispiel, hier nicht dargestellt, ist es auch denkbar, den Durchströmungsquerschnitt in Compressor 4 is positionable in the housing 6, wherein also the stability of the rotor run is favored. Furthermore, the change in the flooded cross section in the flow direction leads to a change in the flow velocity, so that a desired speed profile can be achieved by a targeted change in the flow cross section. According to an alternative embodiment, not shown here, it is also conceivable, the flow cross-section in
Strömungsrichtung zu verkleinern oder aufzuweiten und zu verkleinern oder andersherum. Auch ist es denkbar, dass anstelle der Innenhülse 19 die Außenhülse 20 konisch geformt ist, um die Querschnittsveränderung der Strömungskanäle 21 zu erreichen. Reduce flow direction or widen and shrink or vice versa. It is also conceivable that instead of the inner sleeve 19, the Outer sleeve 20 is conically shaped to achieve the cross-sectional change of the flow channels 21.
Insgesamt ergibt sich hieraus ein Abgasturbolader 1 mit einer Overall, this results in an exhaust gas turbocharger 1 with a
Medienstrommaschine, die ein vorteilhaftes Strömungsverhalten des Mediums stromaufwärts des Verdichters 2 gewährleistet. Medium flow machine, which ensures an advantageous flow behavior of the medium upstream of the compressor 2.

Claims

Ansprüche claims
1. Elektrische Medienstrommaschine (10) für ein Verdichter (2) und/oder eine Turbine (3), insbesondere eines Abgasturboladers (1) einer 1. Electric medium flow machine (10) for a compressor (2) and / or a turbine (3), in particular an exhaust gas turbocharger (1) one
Brennkraftmaschine, mit einem einen Medieneinlass (24) und einen Internal combustion engine, with a fluid inlet (24) and a
Medienauslass (25) aufweisenden Gehäuse (6), mit einer in dem Gehäuse (6) drehbar gelagerten Welle (5), mit einem drehfest an der Welle (5) angeordneten Rotor (11) und mit einem gehäusefesten Stator (12), der eine Antriebswicklung (17) und mehrere radial nach innen vorstehende Statorzähne (15) aufweist, mit einer den Rotor (11) umfangsseitig umgebenden Innenhülse (19) und einer koaxial zum Rotor (11) angeordneten Außenhülse (20), wobei durch die sich durch die Außenhülse (20) zumindest bis zur Innenhülse (19) erstreckenden Statorzähne (15), die Innenhülse (19) und die Außenhülse (20) mehrere durch den Stator (12) führende Strömungskanäle (21) als einzige Durchströmungswege durch die Medienstrommaschine (10) für das vom Medieneinlass (24) zum Medienauslass (25) strömende Medium gebildet sind, dadurch gekennzeichnet, dass sich der radiale Abstand zwischen Außenhülse (20) und Innenhülse (19) und dadurch ein Durchströmungsquerschnitt der Strömungskanäle (21) in ihrer Axialerstreckung verändert. Media outlet (25) having housing (6), with a rotatably mounted in the housing (6) shaft (5) with a rotatably on the shaft (5) arranged rotor (11) and with a housing fixed stator (12) having a Drive winding (17) and a plurality of radially inwardly projecting stator teeth (15), with the rotor (11) circumferentially surrounding the inner sleeve (19) and a coaxial with the rotor (11) arranged outer sleeve (20), through which through the outer sleeve (20) at least up to the inner sleeve (19) extending stator teeth (15), the inner sleeve (19) and the outer sleeve (20) a plurality of the stator (12) leading flow channels (21) as the only flow paths through the media flow machine (10) for the medium flowing from the media inlet (24) to the media outlet (25) are formed, characterized in that the radial distance between outer sleeve (20) and inner sleeve (19) and thereby a flow cross-section of the flow channels (21) in ih changed axial extension.
2. Elektrische Medienstrommaschine nach Anspruch 1, dadurch gekennzeichnet, dass sich der Abstand zwischen Außenhülse (20) und 2. Electric medium flow machine according to claim 1, characterized in that the distance between the outer sleeve (20) and
Innenhülse (19) und dadurch der Durchströmungsquerschnitt der Inner sleeve (19) and thereby the flow area of the
Strömungskanäle (21) in Strömungsrichtung des Mediums vergrößert. Flow channels (21) increases in the flow direction of the medium.
3. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Innenhülse (19) konusförmig ausgebildet ist. 3. Electric medium flow machine according to one of the preceding claims, characterized in that the inner sleeve (19) is cone-shaped.
4. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Außenhülse (20) zylinderförmig ausgebildet ist. 4. Electric medium flow machine according to one of the preceding claims, characterized in that the outer sleeve (20) is cylindrical.
5. Elektrische Medienstrommaschine nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Außenhülse (20) konusförmig und die Innenhülse (19) insbesondere zylinderförmig ausgebildet ist. 5. Electric medium flow machine according to one of claims 1 to 3, characterized in that the outer sleeve (20) is cone-shaped and the inner sleeve (19) is in particular cylindrical.
6. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (11) zumindest einen konusförmig ausgebildeten Permanentmagneten (22) aufweist. 6. Electric media stream machine according to one of the preceding claims, characterized in that the rotor (11) has at least one cone-shaped permanent magnet (22).
7. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (11) eine den 7. Electric medium flow machine according to one of the preceding claims, characterized in that the rotor (11) has a
Permanentmagneten (22) umfassende und drehfest mit der Welle (5) verbundene Rotorhülse (23) aufweist, die korrespondierend zu dem Having permanent magnet (22) and rotatably connected to the shaft (5) connected rotor sleeve (23) corresponding to the
Permanentmagneten (22) konusförmig ausgebildet ist. Permanent magnet (22) is cone-shaped.
8. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die radiale Länge der 8. Electric medium flow machine according to one of the preceding claims, characterized in that the radial length of the
Statorzähne (15) in Strömungsrichtung des Mediums verändert. Statorzähne (15) changed in the flow direction of the medium.
9. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die radiale Länge der 9. Electric medium flow machine according to one of the preceding claims, characterized in that the radial length of the
Statorzähne (15) in Strömungsrichtung derart verändert, dass ein radialer Abstand zwischen Statorzähnen (15) und dem Permanentmagnet (22) des Rotors (11) in Strömungsrichtung konstant oder nahezu konstant ist. Statorzähne (15) in the flow direction changed such that a radial distance between the stator teeth (15) and the permanent magnet (22) of the rotor (11) in the flow direction is constant or nearly constant.
10. Elektrische Medienstrommaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Stator (12) mehrere axial aneinander anliegende Statorlamellen (26) aufweist, wobei die Statorzähne (15) bildende radial vorstehende Statorzahnabschnitte (28) der Statorlamellen (26) in Strömungsrichtung unterschiedlich lang ausgebildet sind. 10. Electric medium flow machine according to one of the preceding claims, characterized in that the stator (12) has a plurality of axially adjacent stator blades (26), the stator teeth (15) forming radially projecting stator tooth sections (28) of the stator blades (26) in the flow direction different are long trained.
11. Turbine (3) und/oder Verdichter (2), insbesondere Abgasturbolader (1), mit einem einen Medieneinlass (24) und einen Medienauslass (25) aufweisenden Gehäuse (6) und mit einer in dem Gehäuse (6) drehbar gelagerten Welle (5), auf welcher zumindest ein Verdichterrad (4) oder Turbinenrad (7) drehfest angeordnet ist, und mit einer elektrischen Medienstrommaschine (10), die einen auf der Welle (5) drehfest angeordneten Rotor (11) und einen gehäusefesten Stator (12) aufweist, wobei der Stator (12) eine Antriebswicklung (17) zum Erzeugen eines Antriebsmagnetfelds aufweist, gekennzeichnet durch die Ausbildung der Medienstrommaschine (10) nach einem oder mehreren der Ansprüche 1 bis 10. 11. Turbine (3) and / or compressor (2), in particular exhaust gas turbocharger (1), with a housing having a media inlet (24) and a media outlet (25) housing (6) and with a rotatably mounted in the housing (6) shaft (5), on which at least one compressor wheel (4) or turbine wheel (7) is arranged rotationally fixed, and with an electric media flow machine (10) having a rotatably mounted on the shaft (5) rotor (11) and a housing fixed Stator (12), wherein the stator (12) has a drive winding (17) for generating a drive magnetic field, characterized by the formation of the media flow machine (10) according to one or more of claims 1 to 10.
PCT/EP2019/051427 2018-03-27 2019-01-22 Electric media flow machine for a compressor and/or a turbine WO2019185211A1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2072824A2 (en) * 2007-12-20 2009-06-24 SycoTec GmbH & Co. KG Electric motor or generator
WO2011014934A1 (en) * 2009-08-03 2011-02-10 Atlas Copco Airpower Turbocompressor system
US8550793B2 (en) * 2007-05-24 2013-10-08 Lindenmaier Ag Fastening of rotor magnets on the shaft of a compressor arrangement
DE102014210451A1 (en) 2014-06-03 2015-12-03 Robert Bosch Gmbh Turbocharger with electric machine
WO2017094426A1 (en) * 2015-12-03 2017-06-08 三菱重工業株式会社 Electric motor support mechanism, compressor, and supercharger
DE102017207532A1 (en) 2017-05-04 2018-11-08 Bosch Mahle Turbo Systems Gmbh & Co. Kg Electric media splitting machine for a compressor and / or a turbine, turbocharger and / or turbine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8550793B2 (en) * 2007-05-24 2013-10-08 Lindenmaier Ag Fastening of rotor magnets on the shaft of a compressor arrangement
EP2072824A2 (en) * 2007-12-20 2009-06-24 SycoTec GmbH & Co. KG Electric motor or generator
WO2011014934A1 (en) * 2009-08-03 2011-02-10 Atlas Copco Airpower Turbocompressor system
DE102014210451A1 (en) 2014-06-03 2015-12-03 Robert Bosch Gmbh Turbocharger with electric machine
WO2017094426A1 (en) * 2015-12-03 2017-06-08 三菱重工業株式会社 Electric motor support mechanism, compressor, and supercharger
DE102017207532A1 (en) 2017-05-04 2018-11-08 Bosch Mahle Turbo Systems Gmbh & Co. Kg Electric media splitting machine for a compressor and / or a turbine, turbocharger and / or turbine

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