WO2016000930A1 - Compresseur électrique pour moteur à combustion interne - Google Patents

Compresseur électrique pour moteur à combustion interne Download PDF

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Publication number
WO2016000930A1
WO2016000930A1 PCT/EP2015/063184 EP2015063184W WO2016000930A1 WO 2016000930 A1 WO2016000930 A1 WO 2016000930A1 EP 2015063184 W EP2015063184 W EP 2015063184W WO 2016000930 A1 WO2016000930 A1 WO 2016000930A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
webs
internal combustion
housing
combustion engine
Prior art date
Application number
PCT/EP2015/063184
Other languages
German (de)
English (en)
Inventor
Sven Nigrin
Andreas Burger
Stefan Rothgang
Hendrik Ferner
Markus Von Scheven
Original Assignee
Pierburg 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 Gmbh filed Critical Pierburg Gmbh
Publication of WO2016000930A1 publication Critical patent/WO2016000930A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • 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
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
    • 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
    • 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
    • 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

Definitions

  • the invention relates to an electric compressor for an internal combustion engine with an electric motor having a radially inner rotor and a radially outer stator, a drive shaft on which the rotor of the electric motor is mounted, an impeller which is connected to the drive shaft and in one Flow space between an inlet and an outlet is arranged and a motor housing having a peripheral wall, on the inner surface of the stator of the electric motor with a plurality of evenly distributed over the circumference stator teeth is fixed by pressing.
  • Such electric compressors are used in modern internal combustion engines, in order to be able to provide a sufficient boost pressure in the short term, for example, in the event of sudden load increase demand.
  • these electric compressors in the region close to the idling either enable additional recompression to the exhaust-gas turbocharger or precompression for the latter, whereby the so-called turbocharger can be counteracted.
  • the use is possible as a single supercharger in the internal combustion engine.
  • the stators of such electric motors which are used to drive the compressor in the surrounding motor housing is pressed over the entire surface, resulting in a good durability of the connection, but at the same time leads to a transfer of all vibrations acting on the stator to the surrounding housing. Also, with this type of attachment, it is necessary to apply large forces to create the interference fit between the housing and the stator.
  • DE 10 2009 027 872 A1 proposes an electric motor with internal rotor and external stator, in which the stator is fastened in the surrounding housing via two substantially cylindrical decoupling rings arranged at its axial ends. In this way, although the contact surfaces between the stator and the housing are reduced, however, additional components for mounting are required, which increases the assembly effort and results in that an ideal concentric position of the stator to the rotor can not be ensured.
  • the stator is formed by a laminated core whose sheets have at its axial ends a larger outer diameter, so that the stator when installed in the surrounding housing only held over these axial ends becomes.
  • the space is filled either with air or with a damping mass.
  • the distance of the stator to the housing is in this filled with air or damping mass Section relatively large, so that heat generated in the stator can be dissipated through the housing poor, which is disadvantageous when using the electric motor as a drive for a high-speed compressor and can lead to thermal overload.
  • the surrounding housing is sensitive to radial vibrations.
  • the stator is guided over its entire length and yet the contact surfaces between the surrounding motor housing and the stator minimized.
  • the insertion of the stator during assembly is facilitated by these axial webs due to the smaller contact surfaces.
  • a large contact pressure for a secure attachment of the stator can be generated in the housing in the investment areas.
  • rotational movements of the stator due to the magnetic forces are reliably avoided.
  • the webs are linear on the stator or the surrounding peripheral wall. In this way, the abutment surfaces are minimized, thereby increasing the contact pressure per unit area of attachment and minimizing the area for transmitting vibrations.
  • the webs are distributed uniformly over the circumference, whereby the forces acting on the stator or the motor housing by the pressing forces cancel each other, so that occurring bending moments are avoided.
  • the webs are arranged between the stator teeth. It has been found that occurring vibrations of the stator, especially in the area of the teeth, are generated and transmitted from the stator teeth via the return ring. By this offset to the stator teeth, these vibrations are not completely transferred to the housing, whereby the noise is additionally attenuated.
  • the webs are formed on the inner surface of the peripheral wall.
  • these webs are easy to produce without additional parts time or assembly costs.
  • the demolding of the motor housing from the mold is not complicated.
  • the strength and rigidity of the motor housing is increased by the webs, so that the motor housing can be made with lower wall thicknesses, which in turn leads to a lower weight.
  • the joining of the stator in the housing can be carried out with little force.
  • the webs are formed on the outer surface of the stator.
  • the position of the webs is already fixed to the stator teeth in the manufacture of the stator, so that an alignment of the stator to the housing in the circumferential direction is eliminated. Also in this embodiment no additional components are needed.
  • a damping material can be arranged between the webs. Although this increases the contact surface, but without vibrations are transmitted. As a result, the heat dissipation from the stator to the housing can be improved when using a good heat conducting material as a damping material.
  • an electric compressor for an internal combustion engine in which the stator of the electric motor is decoupled from the surrounding motor housing, that significantly fewer vibrations are transmitted from the stator to the motor housing, whereby the noise emissions minimized and thus meets the acoustic requirements of such a compressor can be.
  • a connection to the heat dissipation via the motor housing can still be achieved.
  • the number of components and the assembly and manufacturing costs remain low.
  • joining forces are reduced during assembly and, if necessary, the strength of the motor housing is increased without having to increase the wall thicknesses.
  • FIG. 1 shows a side view of an electric compressor according to the invention in a sectional view.
  • FIG. 2 shows a perspective view of the motor housing of the compressor of FIG. 1.
  • Figure 3 shows an enlarged view of a cross section through the motor housing of the compressor shown in Figure 1 in a sectional view.
  • the electric compressor consists of a housing 10, which is composed of a total of four housing parts.
  • a stator 14 of an electric motor 16 is pressed.
  • This stator 14 cooperates in a known manner with a rotor 18 which is fixedly mounted on a drive shaft 20.
  • the drive shaft 20 is connected via a first bearing 22, which is arranged in a first bearing receptacle 24, which is formed centrally on the motor housing 12, and a second bearing 26, which is arranged in a second bearing receptacle 28, which is formed centrally on an electronics housing 30 stored.
  • the motor housing 12 and electronics housing 30 define an engine compartment 32 in which the entire electric motor 16 is received.
  • an impeller 34 of the electric compressor is arranged in a flow space 36, which is bounded by a flow housing 38 and a first radially extending to the drive shaft 20 bottom 40 of the motor housing 12.
  • the flow housing 38 which is fastened to the motor housing 12, has a spiral channel 42 into which the gas flowing in via an inlet 44 formed on the flow housing 38 is conveyed by means of the impeller 34. In the spiral channel 42, this gas is compressed until it leaves the flow space 36 and the spiral channel 42 via an outlet 46 likewise formed on the flow housing 38.
  • This cylindrical projection 54 is, as can be seen in particular in Figure 2, connected via ribs 62 with a motor space 32 radially bounding and extending from the bottom 40 axially in the direction of the electronics housing 30 extending cylindrical peripheral wall 64, on the inside of the stator 14 is pressed ,
  • the motor housing 12 has six evenly distributed over the circumference ribs 62, which are each arranged offset to winding heads 66 on the stator teeth 68 of the stator 14 and thus each project centrally into a space between the winding heads 66.
  • stator 14 has a constant diameter which is slightly larger than the distance between two of these webs 70 on the radially opposite sides of the peripheral wall 64 and slightly smaller than the diameter of the regions of the peripheral wall 64, where no web 70 is formed. Accordingly, the pressing of the stator 14 takes place during assembly and thus its attachment in the motor housing 12 exclusively on the evenly distributed over the circumference six Webs 70, which, like the ribs 62 viewed in the circumferential direction are arranged between the stator teeth 68 and abut against the radial outer surface of the stator 14.
  • the contact surface is as small as possible, so that only a line contact between the webs 70 and the radial outer surface of the stator 14 is formed. In the other areas, the outer surface of the stator 14 to the surrounding peripheral wall 64 at a small distance.
  • a helically extending around the peripheral wall partition wall 72 is formed, against the radial outer side of an axially extending cylindrical peripheral wall 74 of the electronics housing 30 is applied in that between the turns of the partition 72, a coolant channel 76 is formed, which is flowed through by a coolant.
  • the circumferential wall 64 of the motor housing 12 is surrounded over the entire axial extent of the stator 14 from the coolant channel 76, so that the heat generated in the stator 14 can be dissipated via the coolant despite the gap between the outer surface of the stator 14 and the inner surface of the peripheral wall 64.
  • the gap can also be filled with a good heat-conducting damping material.
  • the axial end of the peripheral wall 64 is disposed in an annular receiving opening 80 which is formed radially between the peripheral wall 74 and a cylindrical projection 82 of the electronics housing 30.
  • This cylindrical projection 82 of the electronics housing 30, as well as the peripheral wall 64 of the motor housing 12 via six second, radially and axially extending ribs 86, which in turn are formed in extension of the webs 70 and thus axially opposite to the ribs 62, with an axially in the engine compartment 32 facing second cylindrical projection 88 is connected.
  • This serves as a second bearing receptacle 24 for the second bearing 26 and is integral with a second radially extending bottom 90, from which also the peripheral wall 74 and the cylindrical projection 82 extend axially.
  • the ribs 86 are formed as annular projections 92 having an inner through-opening 94, through each of which a winding end of each winding head 66 extends to the opposite side of the bottom 90.
  • a board 96 is arranged, which contains the control electronics, so that the coil ends can be connected directly to the board 96 and the winding heads 66 can be powered via the board 96 with power to drive the electric motor 16.
  • the circuit board 96 is located in an electronics compartment 98 which is radially bounded by an outer wall 100 that extends 90 from the bottom 90 to the peripheral wall 74 and is axially closed by a cover 102.
  • the embodiment of the motor housing 12 and the electronics housing 30 with the ribs 62, 86 and the webs 70 a very good rigidity of the housing 10 and the bearing receivers 24, 28 is achieved, even at rotational speeds of the impeller 34 of up to 100,000 RPM, the resulting axial and radial forces, which are still transmitted to the housing 10, are absorbed by this and a constant concentricity of the rotor 18 and the stator 14 are ensured during operation.
  • the mounting of the stator 14 in the motor housing 12 is also simplified compared to known designs by the small contact surfaces. Nevertheless, a very firm connection is created, since 70 high contact forces act on the stator 14 in the region of the webs.
  • the webs can also be formed on the outer circumference of the stator, whereby their angular position would also be fixed to the stator teeth. It would also be conceivable to use additional components as a bridge. Other design changes of the compressor or the distribution of the housing are of course also conceivable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne des compresseurs électriques destinés à des moteurs à combustion interne équipés d'un moteur électrique (16) qui comporte un rotor radialement intérieur (18) et un stator radialement extérieur (14), d'un arbre d'entraînement (20) sur lequel le rotor (18) du moteur électrique (16) est fixé, d'un rotor (34) qui est relié à l'arbre d'entraînement (20) et qui est disposé dans un espace d'écoulement (36) entre une entrée (44) et une sortie (46) et d'un boîtier de moteur (12) comportant une paroi périphérique (64) à la surface intérieure de laquelle le stator (14) du moteur électrique (16), pourvu d'une pluralité de dents de stator (68) réparties uniformément sur la périphérie, est fixé par enfoncement. Selon l'invention, pour réduire les émissions sonores dirigées vers l'extérieur, une pluralité de nervures (70), s'étendant dans la direction axiale et permettant de fixer le stator (14) dans le boîtier de moteur (12), sont formées entre la surface intérieure de la paroi périphérique (64) et une surface radiale extérieure du stator (14).
PCT/EP2015/063184 2014-07-02 2015-06-12 Compresseur électrique pour moteur à combustion interne WO2016000930A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102014109256.2 2014-07-02
DE102014109256 2014-07-02
DE102015106652.1A DE102015106652A1 (de) 2014-07-02 2015-04-29 Elektrischer Verdichter für eine Verbrennungskraftmaschine
DE102015106652.1 2015-04-29

Publications (1)

Publication Number Publication Date
WO2016000930A1 true WO2016000930A1 (fr) 2016-01-07

Family

ID=59009119

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/063184 WO2016000930A1 (fr) 2014-07-02 2015-06-12 Compresseur électrique pour moteur à combustion interne

Country Status (2)

Country Link
DE (1) DE102015106652A1 (fr)
WO (1) WO2016000930A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049994A1 (fr) * 2016-04-11 2017-10-13 Valeo Systemes De Controle Moteur Compresseur electrique avec circuit de refroidissement
EP3232543A1 (fr) * 2016-04-15 2017-10-18 Bühler Motor GmbH Moteur de pompe comprenant un pot d'entrefer
US10502124B2 (en) * 2017-01-18 2019-12-10 Mahle International Gmbh Exhaust gas turbocharger comprising adjusting device
WO2021019058A1 (fr) * 2019-07-31 2021-02-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Carter moteur et procédé de fabrication d'un carter moteur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017100181A1 (de) 2017-01-06 2018-07-12 Pierburg Gmbh Elektromotor zum Antrieb eines elektrischen Verdichters für eine Verbrennungskraftmaschine sowie Verfahren zur Montage eines Stators eines derartigen Elektromotors
JP2019161798A (ja) * 2018-03-09 2019-09-19 本田技研工業株式会社 回転電機の冷却構造体
EP3667087B1 (fr) * 2018-12-13 2022-12-07 Grundfos Holding A/S Ensemble de pompe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070210669A1 (en) * 2006-03-10 2007-09-13 Hiroshi Fukasaku Electric motor and method of manufacturing the same
JP2009033860A (ja) * 2007-07-26 2009-02-12 Asmo Co Ltd 回転電機
JP2014075900A (ja) * 2012-10-04 2014-04-24 Mitsubishi Electric Corp 回転電機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009027872A1 (de) 2009-07-21 2011-01-27 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Anordnung zur akustischen Entkopplung eines Stators eines Elektromotors
DE102012209589A1 (de) 2012-06-06 2013-12-12 Robert Bosch Gmbh Stator für eine elektrische Maschine und Baugruppe, die den Stator umfasst

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070210669A1 (en) * 2006-03-10 2007-09-13 Hiroshi Fukasaku Electric motor and method of manufacturing the same
JP2009033860A (ja) * 2007-07-26 2009-02-12 Asmo Co Ltd 回転電機
JP2014075900A (ja) * 2012-10-04 2014-04-24 Mitsubishi Electric Corp 回転電機

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049994A1 (fr) * 2016-04-11 2017-10-13 Valeo Systemes De Controle Moteur Compresseur electrique avec circuit de refroidissement
WO2017178748A1 (fr) * 2016-04-11 2017-10-19 Valeo Systemes De Controle Moteur Compresseur électrique avec circuit de refroidissement moulé
EP3232543A1 (fr) * 2016-04-15 2017-10-18 Bühler Motor GmbH Moteur de pompe comprenant un pot d'entrefer
CN107299903A (zh) * 2016-04-15 2017-10-27 标立电机有限公司 具有隔离罐的泵马达
CN107299903B (zh) * 2016-04-15 2020-07-10 标立电机有限公司 具有隔离罐的泵马达
US10502124B2 (en) * 2017-01-18 2019-12-10 Mahle International Gmbh Exhaust gas turbocharger comprising adjusting device
WO2021019058A1 (fr) * 2019-07-31 2021-02-04 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Carter moteur et procédé de fabrication d'un carter moteur

Also Published As

Publication number Publication date
DE102015106652A1 (de) 2016-01-07

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