WO2018001608A1 - Electric machine - Google Patents

Electric machine Download PDF

Info

Publication number
WO2018001608A1
WO2018001608A1 PCT/EP2017/060754 EP2017060754W WO2018001608A1 WO 2018001608 A1 WO2018001608 A1 WO 2018001608A1 EP 2017060754 W EP2017060754 W EP 2017060754W WO 2018001608 A1 WO2018001608 A1 WO 2018001608A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
shoulder
fluid
fluid channel
machine according
Prior art date
Application number
PCT/EP2017/060754
Other languages
German (de)
French (fr)
Inventor
Thomas Winter
Zhengyu Liu
Markus Heidrich
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 WO2018001608A1 publication Critical patent/WO2018001608A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the invention is based on an electrical machine according to the preamble of the main claim.
  • An electric machine from JP 2015-122899A is already known, with a housing which comprises a stator with an electrical winding and has at least one frontal opening in which a bearing plate is arranged, which is a receptacle for a shaft bearing for supporting a rotor shaft and has a for the centering of the bearing plate relative to the housing provided and projecting into the housing shoulder.
  • the electrical winding of the stator forms at the end faces of the stator in each case a winding head which can be sprayed via openings of a fluid channel with a fluid.
  • the fluid channel is arranged as a separate line on the inner circumference of the housing and includes nozzles to spray the fluid of the fluid channel into the housing, in particular on the winding heads of the electrical winding.
  • the electrical machine according to the invention with the characterizing features of the main claim has the advantage that the manufacturing cost of the electric machine can be reduced by the fluid channel between the shoulder of the bearing plate and the housing is formed.
  • the measures listed in the dependent claims are advantageous
  • a groove is provided on the shoulder, which forms the fluid channel together with the inner circumference of the housing.
  • a groove may be provided on the inner circumference of the housing, which together with the Shoulder forms the fluid channel.
  • the fluid channel can be particularly easily integrated in the shoulder of the bearing plate, wherein the radially outwardly open groove through the wall of the inner circumference of the housing of the electric machine to the closed channel.
  • a press fit or clearance fit may be provided between the shoulder and the inner circumference of the housing such that the fluid channel is substantially dense.
  • a clearance fit between the shoulder and the inner periphery of the housing can be made such that there is a leakage gap through which fluid can escape from the fluid channel and thereby set a predetermined pressure in the fluid channel.
  • the shoulder of the bearing plate at least partially surrounds or surrounds the winding head of the electric machine, since the fluid in this way is particularly easy sprayable or sprayable on the winding head.
  • outlet openings of the fluid channel are arranged such that the fluid emerging from the outlet openings strikes the winding head. In this way, an effective and cost-effective cooling of the winding head is achieved.
  • the winding head has passage openings which are arranged such that the fluid exiting the outlet openings of the fluid channel during operation of the electric machine passes via the passage openings of the winding head onto the rotating rotor shaft or a rotor arranged on the rotor shaft.
  • the fluid is again thrown from the rotor shaft or the rotor from radially inside the winding head to the outside radially against the winding head, whereby an additional cooling effect is achieved.
  • the groove extends on the shoulder in the circumferential direction over a partial circumference or over the entire circumference of the shoulder.
  • Housing remote from the shoulder are arranged in the circumferential direction one behind the other, in particular at the same distance from each other. In this way, a homogeneous temperature distribution throughout the winding head is achieved. It is also advantageous if the fluid channel is connected via a connection channel with a fluid connection provided on the end plate.
  • the fluid connection can be arranged according to a first embodiment on the front side or according to a second embodiment at the periphery of the bearing plate.
  • Fig.l shows in section a simplified illustrated electric machine and Fig.2 an inventive bearing plate according to Fig.l.
  • Fig.l shows in section a simplified illustrated electrical machine.
  • the electric machine 1 has a housing 2, which comprises a stator 3 with an electrical winding 4 and has at least one end-side housing opening 5, on each of which a decker-shaped bearing plate 6 is arranged, which closes the respective housing opening 5 tightly.
  • a sealing means 7, in particular an O-ring, is provided between the bearing plate 6 and the housing 2.
  • the housing 2 is designed as a hollow cylinder with two housing openings 5 and two ceiling-shaped end shields 6.
  • the housing 2 could also be executed cup-shaped with a housing opening 5 and the housing opening 5 occlusive ceiling-shaped bearing plate 6.
  • the ceiling-shaped bearing plate 6 has a receptacle 9 for a shaft bearing 10 for supporting a rotor shaft 11 and provided for centering the bearing plate 6 and projecting into the housing 2 shoulder 12.
  • the shoulder 12 is formed for example as an annular circumferential shoulder. Alternatively, however, several shoulders 12 could be provided, which are spaced apart in the circumferential direction with respect to the housing 2.
  • balancing wheel 13.1 At the end faces of the rotor 13 in each case one in the axial direction projecting balancing wheel 13.1 is arranged in a permanent-magnet synchronous machine. In the case of an asynchronous machine, a short-circuit ring 13.1 projecting in the axial direction is provided on the front sides of the rotor 13 in each case.
  • the electrical winding 4 forms at the end faces of the stator 3 in each case a winding head 15 which can be sprayed via outlet openings 16 of a fluid channel 17 with a fluid, in particular oil, in order to achieve cooling of the winding head 15.
  • the housing 2 may have an oil drain opening 8 for discharging the
  • the outlet openings 16 are designed for example nozzle-shaped.
  • the fluid channel 17 is connected via a connecting channel 18 to a fluid port 20 provided on the end shield 6, which is provided, for example, by a fluid port 20, not shown
  • Fluid pump is supplied with fluid.
  • the fluid connection 20 may be arranged on the circumference or on the front side of the bearing plate 6.
  • the fluid channel 17 is formed on the shoulder 12 or on one of the shoulders 12 of the bearing plate 6.
  • the embodiment surrounds or surrounds the shoulder 12 of the respective bearing plate 6, the respective winding head 15 of the electric machine 1 at least partially, so that the outlet openings 16 of the fluid channel 17 from the
  • Outlet 16 can exiting fluid radially inwardly with respect to a rotor axis 14 of the rotor shaft 11 to the winding head 15.
  • the shoulder 12 of the bearing plate 6 is therefore arranged in the radial direction with respect to the rotor axis 14 outside of the winding head 15 and can extend into the region of the winding head 15 seen in the axial direction.
  • the outlet openings 16 of the fluid channel 17 may be aligned in the radial direction with respect to the rotor axis 14 or obliquely to the radial direction.
  • a groove 21 is provided which forms the fluid channel 17 together with the inner circumference of the housing 2.
  • the groove 21 extends on the shoulder 12 in the circumferential direction over part of the circumference or over the entire circumference of the shoulder 12
  • Dimensions of the groove 21, in particular the length of the groove 21 measured in the circumferential direction, as well as the number and the diameter of the outlet openings 16 can be designed so that optimum cooling of the winding head results for the respective application.
  • the outlet openings 16 of the fluid channel 17 are arranged on the side facing away from the housing 2 of the shoulder 12 in the circumferential direction one behind the other and open into the groove 21 ( Figure 2).
  • a press fit or a clearance fit may be provided between the shoulder 12 and the inner circumference of the housing 2 such that the fluid channel is substantially dense.
  • a clearance fit may be made such that there is a leakage gap 22 through which fluid can escape from the fluid channel and thereby set a predetermined pressure in the fluid channel 17.
  • the leakage gap 22 is to be designed such that the fluid of the fluid channel 17 exits substantially via the outlet openings 16 and not via the leakage gap 22.
  • the winding head 15 may have passage openings 23 which are arranged such that the fluid emerging from the outlet openings 16 of the fluid channel 17 passes via the passage openings 23 of the winding head 15 onto the rotor shaft 11 or the rotor 13. As a result, when the rotor shaft 11 rotates, the fluid is once again thrown onto the winding head 15 by the rotor shaft 11 or by the rotor 13 from radially inside the winding head 15, resulting in an additional cooling effect.
  • the passage openings 23 are arranged in the winding head 15 such that the fluid flowing through the passage openings 23 strikes the balancing disks 13.1 or the short-circuit ring 13.1 of the rotor 13 and thrown radially outward therefrom.
  • FIG. 2 shows an inventive end shield according to Fig.l.
  • the opposite of the electrical machine according to Fig.l constant or equivalent parts are indicated by the same reference numerals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Electric machines are known comprising a housing that encloses a stator with an electric winding and has at least one end-face opening in which an end shield is arranged having a receiving area for a shaft bearing for supporting a rotor shaft and a shoulder, said shoulder being provided for centering the end shield relative to the housing and protruding into the housing. The electric winding of the stator forms a winding head, which can be sprayed with a fluid via openings of a fluid channel, at each of the end faces of the stator. The fluid channel is arranged on the inner circumference of the housing as a separate line and comprises nozzles in order to spray the fluid of the fluid channel into the housing, in particular onto the winding heads of the electric winding. In the electric machine according to the invention, production costs of the electric machine are reduced. According to the invention, the fluid channel (17) is formed between the shoulder (12) of the end shield (6) and the housing (2).

Description

Beschreibung Titel  Description title
Elektrische Maschine  Electric machine
Stand der Technik Die Erfindung geht aus von einer elektrischen Maschine nach der Gattung des Hauptanspruchs. PRIOR ART The invention is based on an electrical machine according to the preamble of the main claim.
Es ist schon eine elektrische Maschine aus der JP 2015-122899A bekannt, mit einem Gehäuse, das einen Stator mit einer elektrischen Wicklung umfasst und zumindest eine stirnseitige Öffnung aufweist, in der ein Lagerschild angeordnet ist, das eine Aufnahme für ein Wellenlager zur Lagerung einer Rotorwelle und eine zum Zentrieren des Lagerschildes relativ zum Gehäuse vorgesehene und in das Gehäuse vorstehende Schulter aufweist. Die elektrische Wicklung des Stators bildet an den Stirnseiten des Stators jeweils einen Wickelkopf, der über Öffnungen eines Fluidkanals mit einem Fluid besprühbar ist. Der Fluidkanal ist als separate Leitung am Innenumfang des Gehäuses angeordnet und umfasst Düsen, um das Fluid des Fluidkanals in das Gehäuse, insbesondere auf die Wickelköpfe der elektrischen Wicklung, aufzusprühen.  An electric machine from JP 2015-122899A is already known, with a housing which comprises a stator with an electrical winding and has at least one frontal opening in which a bearing plate is arranged, which is a receptacle for a shaft bearing for supporting a rotor shaft and has a for the centering of the bearing plate relative to the housing provided and projecting into the housing shoulder. The electrical winding of the stator forms at the end faces of the stator in each case a winding head which can be sprayed via openings of a fluid channel with a fluid. The fluid channel is arranged as a separate line on the inner circumference of the housing and includes nozzles to spray the fluid of the fluid channel into the housing, in particular on the winding heads of the electrical winding.
Vorteile der Erfindung Die erfindungsgemäße elektrische Maschine mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, dass die Herstellungskosten der elektrischen Maschine verringert werden, indem der Fluidkanal zwischen der Schulter des Lagerschildes und dem Gehäuse ausgebildet ist. Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Advantages of the invention The electrical machine according to the invention with the characterizing features of the main claim has the advantage that the manufacturing cost of the electric machine can be reduced by the fluid channel between the shoulder of the bearing plate and the housing is formed. The measures listed in the dependent claims are advantageous
Weiterbildungen und Verbesserungen der im Hauptanspruch angegebenen Further developments and improvements specified in the main claim
elektrischen Maschine möglich. electric machine possible.
Gemäß einer vorteilhaften Ausführung ist an der Schulter eine Nut vorgesehen, die zusammen mit dem Innenumfang des Gehäuses den Fluidkanal bildet. Alternativ kann an dem Innenumfang des Gehäuses eine Nut vorgesehen sein, die zusammen mit der Schulter den Fluidkanal bildet. Nach der ersten Ausführung lässt sich der Fluidkanal besonders einfach in der Schulter des Lagerschildes integrieren, wobei die nach radial außen offene Nut durch die Wandung des Innenumfangs des Gehäuses der elektrischen Maschine zum geschlossenen Kanal wird. In radialer Richtung bezüglich einer Rotorachse gesehen kann zwischen der Schulter und dem Innenumfang des Gehäuses eine Presspassung oder Spielpassung derart vorgesehen sein, dass der Fluidkanal im wesentlichen dicht ist. Alternativ kann zwischen der Schulter und dem Innenumfang des Gehäuses eine Spielpassung derart ausgeführt sein, dass sich ein Leckagespalt ergibt, über den Fluid aus dem Fluidkanal austreten kann und dadurch ein vorbestimmter Druck in dem Fluidkanal eingestellt wird. According to an advantageous embodiment, a groove is provided on the shoulder, which forms the fluid channel together with the inner circumference of the housing. Alternatively, a groove may be provided on the inner circumference of the housing, which together with the Shoulder forms the fluid channel. After the first embodiment, the fluid channel can be particularly easily integrated in the shoulder of the bearing plate, wherein the radially outwardly open groove through the wall of the inner circumference of the housing of the electric machine to the closed channel. As seen in the radial direction with respect to a rotor axis, a press fit or clearance fit may be provided between the shoulder and the inner circumference of the housing such that the fluid channel is substantially dense. Alternatively, a clearance fit between the shoulder and the inner periphery of the housing can be made such that there is a leakage gap through which fluid can escape from the fluid channel and thereby set a predetermined pressure in the fluid channel.
Besonders vorteilhaft ist, wenn die Schulter des Lagerschildes den Wickelkopf der elektrischen Maschine zumindest teilweise umgibt bzw. umschließt, da das Fluid auf diese Weise besonders einfach auf den Wickelkopf sprüh-oder spritzbar ist. It is particularly advantageous if the shoulder of the bearing plate at least partially surrounds or surrounds the winding head of the electric machine, since the fluid in this way is particularly easy sprayable or sprayable on the winding head.
Außerdem vorteilhaft ist, wenn die Auslassöffnungen des Fluidkanals derart angeordnet sind, dass das aus den Auslassöffnungen austretende Fluid auf den Wickelkopf trifft. Auf diese Weise wird eine effektive und kostengünstige Kühlung des Wickelkopfes erreicht. It is also advantageous if the outlet openings of the fluid channel are arranged such that the fluid emerging from the outlet openings strikes the winding head. In this way, an effective and cost-effective cooling of the winding head is achieved.
Darüber hinaus vorteilhaft ist, wenn der Wickelkopf Durchlassöffnungen aufweist, die derart angeordnet sind, dass das bei Betrieb der elektrischen Maschine aus den Auslassöffnungen des Fluidkanals austretende Fluid über die Durchlassöffnungen des Wickelkopfes auf die sich drehende Rotorwelle oder einen auf der Rotorwelle angeordneten Rotor gelangt. Dadurch wird das Fluid von der Rotorwelle bzw. dem Rotor von radial innerhalb des Wickelkopfes nach radial außen nochmals gegen den Wickelkopf geschleudert, wodurch eine zusätzliche Kühlwirkung erreicht wird. Moreover, it is advantageous if the winding head has passage openings which are arranged such that the fluid exiting the outlet openings of the fluid channel during operation of the electric machine passes via the passage openings of the winding head onto the rotating rotor shaft or a rotor arranged on the rotor shaft. As a result, the fluid is again thrown from the rotor shaft or the rotor from radially inside the winding head to the outside radially against the winding head, whereby an additional cooling effect is achieved.
Weiterhin vorteilhaft ist, wenn die Nut an der Schulter in Umfangsrichtung über einen Teilumfang oder über den gesamten Umfang der Schulter verläuft. It is also advantageous if the groove extends on the shoulder in the circumferential direction over a partial circumference or over the entire circumference of the shoulder.
Sehr vorteilhaft ist es, wenn die Auslassöffnungen des Fluidkanals an der dem It is very advantageous if the outlet openings of the fluid channel at the
Gehäuse abgewandten Seite der Schulter in Umfangsrichtung hintereinander angeordnet sind, insbesondere mit gleichem Abstand zueinander. Auf diese Weise wird eine homogene Temperaturverteilung im gesamten Wickelkopf erzielt. Auch vorteilhaft ist, wenn der Fluidkanal über einen Anschlusskanal mit einem am Lagerschild vorgesehenen Fluidanschluss verbunden ist. Housing remote from the shoulder are arranged in the circumferential direction one behind the other, in particular at the same distance from each other. In this way, a homogeneous temperature distribution throughout the winding head is achieved. It is also advantageous if the fluid channel is connected via a connection channel with a fluid connection provided on the end plate.
Der Fluidanschluss kann nach einem ersten Ausführungsbeispiel an der Stirnseite oder nach einem zweiten Ausführungsbeispiel am Umfang des Lagerschildes angeordnet sein. The fluid connection can be arranged according to a first embodiment on the front side or according to a second embodiment at the periphery of the bearing plate.
Zeichnung drawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert. An embodiment of the invention is shown in simplified form in the drawing and explained in more detail in the following description.
Fig.l zeigt im Schnitt eine vereinfacht dargestellte elektrische Maschine und Fig.2 ein erfindungsgemäßes Lagerschild nach Fig.l. Fig.l shows in section a simplified illustrated electric machine and Fig.2 an inventive bearing plate according to Fig.l.
Beschreibung des Ausführungsbeispiels Description of the embodiment
Fig.l zeigt im Schnitt eine vereinfacht dargestellte elektrische Maschine. Fig.l shows in section a simplified illustrated electrical machine.
Die elektrische Maschine 1 weist ein Gehäuse 2 auf, das einen Stator 3 mit einer elektrischen Wicklung 4 umfasst und zumindest eine stirnseitige Gehäuseöffnung 5 hat, an der jeweils ein deckeiförmiges Lagerschild 6 angeordnet ist, das die jeweilige Gehäuseöffnung 5 dicht verschließt. Dazu ist ein Dichtmittel 7, insbesondere ein O- Ring, zwischen dem Lagerschild 6 und dem Gehäuse 2 vorgesehen. Nach dem The electric machine 1 has a housing 2, which comprises a stator 3 with an electrical winding 4 and has at least one end-side housing opening 5, on each of which a decker-shaped bearing plate 6 is arranged, which closes the respective housing opening 5 tightly. For this purpose, a sealing means 7, in particular an O-ring, is provided between the bearing plate 6 and the housing 2. After this
Ausführungsbeispiel ist das Gehäuse 2 hohlzylinderförmig ausgeführt mit zwei Gehäuseöffnungen 5 und zwei deckeiförmigen Lagerschilden 6. Alternativ könnte das Gehäuse 2 auch topfförmig ausgeführt sein mit einer Gehäuseöffnung 5 und einem die Gehäuseöffnung 5 verschließenden deckeiförmigen Lagerschild 6. Das deckeiförmige Lagerschild 6 hat jeweils eine Aufnahme 9 für ein Wellenlager 10 zur Lagerung einer Rotorwelle 11 und eine zum Zentrieren des Lagerschildes 6 vorgesehene und in das Gehäuse 2 vorstehende Schulter 12. Die Schulter 12 ist beispielsweise als ringförmig umlaufende Schulter ausgebildet. Alternativ könnten aber auch mehrere Schultern 12 vorgesehen sein, die in Umfangsrichtung bezüglich des Gehäuses 2 zueinander beabstandet sind. Auf der Rotorwelle 11 ist ein Rotor 13, beispielsweise als Rotorblechpaket, vorgesehen. An den Stirnseiten des Rotors 13 ist bei einer permanenterregten Synchronmaschine jeweils eine in axialer Richtung vorstehende Wuchtscheibe 13.1 angeordnet. Bei einer Asynchronmaschine ist an den Stirnseiten des Rotors 13 jeweils ein in axialer Richtung vorstehender Kurzschlussring 13.1 vorgesehen. Embodiment, the housing 2 is designed as a hollow cylinder with two housing openings 5 and two ceiling-shaped end shields 6. Alternatively, the housing 2 could also be executed cup-shaped with a housing opening 5 and the housing opening 5 occlusive ceiling-shaped bearing plate 6. The ceiling-shaped bearing plate 6 has a receptacle 9 for a shaft bearing 10 for supporting a rotor shaft 11 and provided for centering the bearing plate 6 and projecting into the housing 2 shoulder 12. The shoulder 12 is formed for example as an annular circumferential shoulder. Alternatively, however, several shoulders 12 could be provided, which are spaced apart in the circumferential direction with respect to the housing 2. On the rotor shaft 11, a rotor 13, for example, as a rotor laminated core, is provided. At the end faces of the rotor 13 in each case one in the axial direction projecting balancing wheel 13.1 is arranged in a permanent-magnet synchronous machine. In the case of an asynchronous machine, a short-circuit ring 13.1 projecting in the axial direction is provided on the front sides of the rotor 13 in each case.
Die elektrische Wicklung 4 bildet an den Stirnseiten des Stators 3 jeweils einen Wickelkopf 15 aus, der über Auslassöffnungen 16 eines Fluidkanals 17 mit einem Fluid, insbesondere Öl, besprühbar ist, um eine Kühlung des Wickelkopfes 15 zu erreichen. Das Gehäuse 2 kann eine Ölablauföffnung 8 zum Abführen des The electrical winding 4 forms at the end faces of the stator 3 in each case a winding head 15 which can be sprayed via outlet openings 16 of a fluid channel 17 with a fluid, in particular oil, in order to achieve cooling of the winding head 15. The housing 2 may have an oil drain opening 8 for discharging the
eingesprühten Fluids aufweisen. having sprayed fluid.
Die Auslassöffnungen 16 sind beispielsweise düsenförmig ausgeführt. Der Fluidkanal 17 ist über einen Anschlusskanal 18 mit einem am Lagerschild 6 vorgesehenen Fluidanschluss 20 verbunden, der beispielsweise von einer nicht dargestelltenThe outlet openings 16 are designed for example nozzle-shaped. The fluid channel 17 is connected via a connecting channel 18 to a fluid port 20 provided on the end shield 6, which is provided, for example, by a fluid port 20, not shown
Fluidpumpe mit Fluid versorgt wird. Der Fluidanschluss 20 kann am Umfang oder an der Stirnseite des Lagerschildes 6 angeordnet sein. Fluid pump is supplied with fluid. The fluid connection 20 may be arranged on the circumference or on the front side of the bearing plate 6.
Erfindungsgemäß ist vorgesehen, dass der Fluidkanal 17 an der Schulter 12 oder an einer der Schultern 12 des Lagerschildes 6 ausgebildet ist. According to the invention, it is provided that the fluid channel 17 is formed on the shoulder 12 or on one of the shoulders 12 of the bearing plate 6.
Nach dem Ausführungsbeispiel umgibt oder umschließt die Schulter 12 des jeweiligen Lagerschildes 6 den jeweiligen Wickelkopf 15 der elektrischen Maschine 1 zumindest teilweise, so dass die Auslassöffnungen 16 des Fluidkanals 17 das aus den According to the embodiment surrounds or surrounds the shoulder 12 of the respective bearing plate 6, the respective winding head 15 of the electric machine 1 at least partially, so that the outlet openings 16 of the fluid channel 17 from the
Auslassöffnungen 16 austretende Fluid nach radial innen bezüglich einer Rotorachse 14 der Rotorwelle 11 auf den Wickelkopf 15 leiten können. Die Schulter 12 des Lagerschildes 6 ist also in radialer Richtung bezüglich der Rotorachse 14 gesehen außerhalb des Wickelkopfes 15 angeordnet und kann in axialer Richtung gesehen in den Bereich des Wickelkopfes 15 hineinreichen. Die Auslassöffnungen 16 des Fluidkanals 17 können in radialer Richtung bezüglich der Rotorachse 14 oder schräg zur radialen Richtung ausgerichtet sein. Outlet 16 can exiting fluid radially inwardly with respect to a rotor axis 14 of the rotor shaft 11 to the winding head 15. The shoulder 12 of the bearing plate 6 is therefore arranged in the radial direction with respect to the rotor axis 14 outside of the winding head 15 and can extend into the region of the winding head 15 seen in the axial direction. The outlet openings 16 of the fluid channel 17 may be aligned in the radial direction with respect to the rotor axis 14 or obliquely to the radial direction.
Auf der dem Gehäuse 2 zugewandten Seite der Schulter 12 des Lagerschildes 6 ist eine Nut 21 vorgesehen, die zusammen mit dem Innenumfang des Gehäuses 2 den Fluidkanal 17 bildet. Die Nut 21 verläuft an der Schulter 12 in Umfangsrichtung über einen Teil des Umfangs oder über den gesamten Umfang der Schulter 12. Die Abmessungen der Nut 21, insbesondere die in Umfangsrichtung gemessene Länge der Nut 21, sowie die Anzahl und der Durchmesser der Auslassöffnungen 16 können so ausgelegt werden, dass sich für die jeweilige Anwendung eine optimale Kühlung des Wickelkopfes ergibt. Die Auslassöffnungen 16 des Fluidkanals 17 sind an der dem Gehäuse 2 abgewandten Seite der Schulter 12 in Umfangsrichtung hintereinander angeordnet und münden in die Nut 21 (Fig.2). On the housing 2 side facing the shoulder 12 of the bearing plate 6, a groove 21 is provided which forms the fluid channel 17 together with the inner circumference of the housing 2. The groove 21 extends on the shoulder 12 in the circumferential direction over part of the circumference or over the entire circumference of the shoulder 12 Dimensions of the groove 21, in particular the length of the groove 21 measured in the circumferential direction, as well as the number and the diameter of the outlet openings 16 can be designed so that optimum cooling of the winding head results for the respective application. The outlet openings 16 of the fluid channel 17 are arranged on the side facing away from the housing 2 of the shoulder 12 in the circumferential direction one behind the other and open into the groove 21 (Figure 2).
In radialer Richtung bezüglich der Rotorachse 14 gesehen kann zwischen der Schulter 12 und dem Innenumfang des Gehäuses 2 eine Presspassung oder eine Spielpassung derart vorgesehen sein, dass der Fluidkanal im wesentlichen dicht ist. Alternativ kann zwischen der Schulter 12 und dem Innenumfang des Gehäuses 2 eine Spielpassung derart ausgeführt sein, dass sich ein Leckagespalt 22 ergibt, über den Fluid aus dem Fluidkanal austreten kann und dadurch ein vorbestimmter Druck in dem Fluidkanal 17 eingestellt wird. Der Leckagespalt 22 ist derart auszuführen, dass das Fluid des Fluidkanals 17 im wesentlichen über die Auslassöffnungen 16 und nicht über den Leckagespalt 22 austritt. As seen in the radial direction with respect to the rotor axis 14, a press fit or a clearance fit may be provided between the shoulder 12 and the inner circumference of the housing 2 such that the fluid channel is substantially dense. Alternatively, between the shoulder 12 and the inner circumference of the housing 2, a clearance fit may be made such that there is a leakage gap 22 through which fluid can escape from the fluid channel and thereby set a predetermined pressure in the fluid channel 17. The leakage gap 22 is to be designed such that the fluid of the fluid channel 17 exits substantially via the outlet openings 16 and not via the leakage gap 22.
Der Wickelkopf 15 kann Durchlassöffnungen 23 aufweisen, die derart angeordnet sind, dass das aus den Auslassöffnungen 16 des Fluidkanals 17 austretende Fluid über die Durchlassöffnungen 23 des Wickelkopfes 15 auf die Rotorwelle 11 oder den Rotor 13 gelangt. Dadurch wird das Fluid bei drehender Rotorwelle 11 von der Rotorwelle 11 bzw. von dem Rotor 13 von radial innerhalb des Wickelkopfes 15 nach radial außen nochmals auf den Wickelkopf 15 geschleudert, wodurch eine zusätzliche Kühlwirkung erreicht wird. Nach dem Ausführungsbeispiel sind die Durchlassöffnungen 23 im Wickelkopf 15 derart angeordnet, dass das durch die Durchlassöffnungen 23 strömende Fluid auf die Wuchtscheiben 13.1 bzw. den Kurzschlussring 13.1 des Rotors 13 trifft und von dort nach radial außen geschleudert wird. The winding head 15 may have passage openings 23 which are arranged such that the fluid emerging from the outlet openings 16 of the fluid channel 17 passes via the passage openings 23 of the winding head 15 onto the rotor shaft 11 or the rotor 13. As a result, when the rotor shaft 11 rotates, the fluid is once again thrown onto the winding head 15 by the rotor shaft 11 or by the rotor 13 from radially inside the winding head 15, resulting in an additional cooling effect. According to the exemplary embodiment, the passage openings 23 are arranged in the winding head 15 such that the fluid flowing through the passage openings 23 strikes the balancing disks 13.1 or the short-circuit ring 13.1 of the rotor 13 and thrown radially outward therefrom.
Fig.2 zeigt ein erfindungsgemäßes Lagerschild nach Fig.l. Bei dem Lagerschild nach Fig.2 sind die gegenüber der elektrischen Maschine nach Fig.l gleichbleibenden oder gleichwirkenden Teile durch die gleichen Bezugszeichen gekennzeichnet. 2 shows an inventive end shield according to Fig.l. In the bearing plate according to Figure 2, the opposite of the electrical machine according to Fig.l constant or equivalent parts are indicated by the same reference numerals.

Claims

Ansprüche Expectations
Elektrische Maschine mit einem Gehäuse Electric machine with a housing
(2), das einen Stator (2), which has a stator
(3) mit einer elektrischen Wicklung (3) with an electrical winding
(4) umfasst und zumindest eine stirnseitige Gehäuseöffnung (4) includes and at least one front housing opening
(5) aufweist, an der ein Lagerschild (6) angeordnet ist, das eine Aufnahme (9) für ein Wellenlager (10) zur Lagerung einer Rotorwelle (11) und eine zum Zentrieren des Lagerschildes (6) vorgesehene und in das Gehäuse (2) vorstehende Schulter (12) aufweist, wobei die elektrische Wicklung (4) an den Stirnseiten des Stators (3) jeweils einen Wickelkopf (15) bildet, der jeweils über Auslassöffnungen (16) eines Fluidkanals (17) mit einem Fluid besprühbar ist, dadurch gekennzeichnet, dass der Fluidkanal (17) zwischen der Schulter (12) des Lagerschildes (6) und dem (5), on which a bearing plate (6) is arranged, which has a receptacle (9) for a shaft bearing (10) for supporting a rotor shaft (11) and one for centering the bearing plate (6) and is inserted into the housing (2 ) has a protruding shoulder (12), the electrical winding (4) forming a winding head (15) on the end faces of the stator (3), which can be sprayed with a fluid via outlet openings (16) of a fluid channel (17), thereby characterized in that the fluid channel (17) between the shoulder (12) of the end shield (6) and the
Gehäuse (2) ausgebildet ist. Housing (2) is formed.
Elektrische Maschine nach Anspruch 1, dadurch gekennzeichnet, dass an der Schulter (12) eine Nut (21) vorgesehen ist, die zusammen mit dem Innenumfang des Gehäuses (2) den Fluidkanal (17) bildet, oder dass an dem Innenumfang des Gehäuses (2) eine Nut (21) vorgesehen ist, die zusammen mit der Schulter (12) den Fluidkanal (17) bildet. Electrical machine according to claim 1, characterized in that a groove (21) is provided on the shoulder (12), which together with the inner circumference of the housing (2) forms the fluid channel (17), or that on the inner circumference of the housing (2 ) a groove (21) is provided which, together with the shoulder (12), forms the fluid channel (17).
Elektrische Maschine nach Anspruch 2, dadurch gekennzeichnet, dass in radialer Richtung bezüglich einer Rotorachse (14) gesehen zwischen der Schulter (12) und dem Innenumfang des Gehäuses (2) ein Leckagespalt (22) vorgesehen ist. 4. Elektrische Maschine nach einem der vorhergehende Ansprüche, dadurch Electrical machine according to claim 2, characterized in that a leakage gap (22) is provided between the shoulder (12) and the inner circumference of the housing (2), viewed in the radial direction with respect to a rotor axis (14). 4. Electrical machine according to one of the preceding claims, thereby
gekennzeichnet, dass die Schulter (12) des Lagerschildes marked that the shoulder (12) of the end shield
(6) den Wickelkopf (15) zumindest teilweise umgibt. (6) at least partially surrounds the winding head (15).
Elektrische Maschine nach einem der vorhergehende Ansprüche, dadurch gekennzeichnet, dass die Auslassöffnungen (16) des Fluidkanals (17) derart angeordnet sind, dass das aus den Auslassöffnungen (16) austretende Fluid auf den Wickelkopf (15) trifft. Electrical machine according to one of the preceding claims, characterized in that the outlet openings (16) of the fluid channel (17) are arranged such that the fluid emerging from the outlet openings (16) hits the winding head (15).
Elektrische Maschine nach einem der vorhergehende Ansprüche, dadurch gekennzeichnet, dass der Wickelkopf (15) Durchlassöffnungen (23) aufweist, die derart angeordnet sind, dass das aus den Auslassöffnungen(16) des Fluidkanals (17) austretende Fluid über die Durchlassöffnungen (23) des Wickelkopfes (15) auf die Rotorwelle (11) gelangt. Electrical machine according to one of the preceding claims, characterized in that the winding head (15) has passage openings (23) which are arranged such that the fluid emerging from the outlet openings (16) of the fluid channel (17) passes through the passage openings (23) of the Winding head (15) reaches the rotor shaft (11).
7. Elektrische Maschine nach einem der vorhergehende Ansprüche, dadurch gekennzeichnet, dass die Nut (21) an der Schulter (12) in Umfangsrichtung über einen Teilumfang oder über den gesamten Umfang der Schulter (12) verläuft. 7. Electrical machine according to one of the preceding claims, characterized in that the groove (21) on the shoulder (12) extends in the circumferential direction over a partial circumference or over the entire circumference of the shoulder (12).
8. Elektrische Maschine nach Anspruch 1, dadurch gekennzeichnet, dass die 8. Electrical machine according to claim 1, characterized in that the
Auslassöffnungen (16) des Fluidkanals (17) an der dem Gehäuse (2) abgewandten Seite der Schulter (12) in Umfangsrichtung hintereinander angeordnet sind und in die Nut (21) münden. Outlet openings (16) of the fluid channel (17) are arranged one behind the other in the circumferential direction on the side of the shoulder (12) facing away from the housing (2) and open into the groove (21).
9. Elektrische Maschine nach Anspruch 1, dadurch gekennzeichnet, dass der Fluidkanal (17) über einen Anschlusskanal (18) mit einem am Lagerschild (6) vorgesehenen Fluidanschluss (20) verbunden ist. 9. Electrical machine according to claim 1, characterized in that the fluid channel (17) is connected via a connection channel (18) to a fluid connection (20) provided on the end shield (6).
10. Elektrische Maschine nach Anspruch 8, dadurch gekennzeichnet, dass der Fluidanschluss (20) an der Stirnseite oder am Umfang des Lagerschildes (6) angeordnet ist. 10. Electrical machine according to claim 8, characterized in that the fluid connection (20) is arranged on the end face or on the circumference of the end shield (6).
PCT/EP2017/060754 2016-06-28 2017-05-05 Electric machine WO2018001608A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016211593.6A DE102016211593A1 (en) 2016-06-28 2016-06-28 Electric machine
DE102016211593.6 2016-06-28

Publications (1)

Publication Number Publication Date
WO2018001608A1 true WO2018001608A1 (en) 2018-01-04

Family

ID=58669809

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/060754 WO2018001608A1 (en) 2016-06-28 2017-05-05 Electric machine

Country Status (2)

Country Link
DE (1) DE102016211593A1 (en)
WO (1) WO2018001608A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108092451A (en) * 2018-01-10 2018-05-29 上海硅泰电子有限公司 The radiator structure of disc type electric machine
WO2022135696A1 (en) 2020-12-22 2022-06-30 Gkn Automotive Limited Electric motor with cooling arrangement and method for controlling a cooling arrangement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001621A1 (en) * 2008-05-07 2009-11-12 Robert Bosch Gmbh Electric machine with integrated housing cooling
US20100320851A1 (en) * 2009-06-17 2010-12-23 Deere & Company Internal oil cooling via housing end brackets for an electric machine
JP2015122899A (en) 2013-12-24 2015-07-02 シンフォニアテクノロジー株式会社 Rotary electric machine
DE102014219724A1 (en) * 2014-09-29 2016-03-31 Robert Bosch Gmbh Electric machine with cooling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001621A1 (en) * 2008-05-07 2009-11-12 Robert Bosch Gmbh Electric machine with integrated housing cooling
US20100320851A1 (en) * 2009-06-17 2010-12-23 Deere & Company Internal oil cooling via housing end brackets for an electric machine
JP2015122899A (en) 2013-12-24 2015-07-02 シンフォニアテクノロジー株式会社 Rotary electric machine
DE102014219724A1 (en) * 2014-09-29 2016-03-31 Robert Bosch Gmbh Electric machine with cooling

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108092451A (en) * 2018-01-10 2018-05-29 上海硅泰电子有限公司 The radiator structure of disc type electric machine
WO2022135696A1 (en) 2020-12-22 2022-06-30 Gkn Automotive Limited Electric motor with cooling arrangement and method for controlling a cooling arrangement
DE112020007883T5 (en) 2020-12-22 2023-10-12 Gkn Automotive Limited Electric motor with cooling arrangement and method for controlling a cooling arrangement

Also Published As

Publication number Publication date
DE102016211593A1 (en) 2017-12-28

Similar Documents

Publication Publication Date Title
EP2301137B1 (en) Electric machine having radial dividers for guiding cooling air
DE102014002278B4 (en) Cooling jacket with a slot unit through which a cooling medium flows, stator with a cooling jacket, and rotating electrical machine with a cooling jacket
DE112011103349B4 (en) Electrical machine coolant drain system and method
DE102014106361B4 (en) Stator of an electric motor with injected by injection molding resin
EP3289669B1 (en) Unenclosed electrical machine
DE102015218412A1 (en) Method for machining a rotor shaft of an electrical machine
WO2017162389A1 (en) Electric machine having a cooling device
WO2016050387A1 (en) Electrical machine with cooling
DE102010003013A1 (en) Method and system for a permanent magnet machine with a directly liquid cooled stator
DE102015100090A1 (en) Cooling of stator coils of an electrical machine
WO2006042832A1 (en) Housing of an electrical machine comprising cooling channels extending in a housing wall
EP2744079A2 (en) Rotor and electric motor
WO2018001608A1 (en) Electric machine
EP3355444B1 (en) Motor vehicle and rotor for an electric machine, an electric machine, in particular asynchronous machine for a motor vehicle
DE112021007923T5 (en) OIL-COOLED HOLLOW ROTARY SHAFT STRUCTURE AND OIL-COOLED ROTOR STRUCTURE
EP2470404B1 (en) Hydrodynamic machine, in particular a hydrodynamic retarder
AT518592A1 (en) HYDROPOWER GENERATOR AND METHOD FOR THE PRODUCTION AND OPERATION THEREOF
DE102019217510A1 (en) Rotor, electric machine and motor vehicle
WO2009135742A2 (en) Electric machine comprising a cooling unit
EP2933496B1 (en) Vacuum pump
WO2021219475A1 (en) Electric machine and method for producing same
WO2015018574A2 (en) Modular unit for a drive train of a motor vehicle
DE102019218719A1 (en) Electric machine and method of manufacturing the electric machine
WO2021160213A1 (en) Electrical drive device and drive arrangement
WO2024099706A1 (en) Rotor of an electric machine

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17721390

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17721390

Country of ref document: EP

Kind code of ref document: A1