WO2024022810A1 - Rotor having a coolant channel for an electric machine - Google Patents

Rotor having a coolant channel for an electric machine Download PDF

Info

Publication number
WO2024022810A1
WO2024022810A1 PCT/EP2023/069256 EP2023069256W WO2024022810A1 WO 2024022810 A1 WO2024022810 A1 WO 2024022810A1 EP 2023069256 W EP2023069256 W EP 2023069256W WO 2024022810 A1 WO2024022810 A1 WO 2024022810A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
lateral surface
sheet metal
laminated core
sheet
Prior art date
Application number
PCT/EP2023/069256
Other languages
German (de)
French (fr)
Inventor
Matthias Kohlhauser
Birgit Lipp
Angelina Ingeborg Topar
Original Assignee
Magna powertrain gmbh & co kg
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 Magna powertrain gmbh & co kg filed Critical Magna powertrain gmbh & co kg
Publication of WO2024022810A1 publication Critical patent/WO2024022810A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
    • 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
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium

Definitions

  • the present invention relates to a rotor for an electrical machine comprising a rotor shaft, a laminated core fixedly arranged on the rotor shaft, the laminated core having at least two laminated metal segments which are lined up in an axial direction with respect to an axis of rotation of the rotor, and at least one with respect to the axis of rotation of the Rotor axially extending coolant channel, wherein the coolant channel is at least partially delimited by a lateral surface of the rotor shaft and an inner lateral surface of the laminated core.
  • Electrical machines of the type mentioned above are used to convert energy from electrical to mechanical energy and vice versa and are often used as motors and/or generators in the field of automotive technology.
  • Electrical machines include a fixed stator and a movable rotor, with the rotor in the most common design of an electrical machine being rotatably mounted within an annular or hollow cylindrical stator.
  • a cooling device is usually provided which cools the parts of the electrical machine to be cooled.
  • Cooling Technology In which axial cooling channels are formed directly through the rotor shaft and a rotor laminated core that is permanently arranged on the rotor shaft.
  • the laminated core of the rotor usually has several laminated metal segments, which in turn comprise several individual electrical sheets. Depending on the “stacking process”, the electrical sheets of a sheet segment are crimped or glued to one another. The individual sheet metal segments are “just” stacked together. Due to the tolerance position, the resistance during the pressing process, the springback effect of the sheet metal segments and also the fanning out during operation of the rotor, air gaps arise between the sheet metal segments of the sheet metal package. When “Reverse Rotor Cooling Technology” is used, these air gaps lead to radial leaks, causing the coolant to be ejected radially during operation.
  • the rotor according to the invention for an electrical machine comprises a rotor shaft, a laminated core fixedly arranged on the rotor shaft, the laminated core having at least two laminated metal segments which are lined up in an axial direction with respect to an axis of rotation of the rotor, and at least one that extends axially with respect to the axis of rotation of the rotor Coolant channel, wherein the coolant channel is at least partially delimited by a lateral surface of the rotor shaft and an inner lateral surface of the laminated core.
  • the laminated core of the rotor and thus the individual laminated segments are essentially hollow cylindrical and have an inner lateral surface facing the lateral surface of the rotor shaft and an outer lateral surface facing away from the lateral surface of the rotor shaft.
  • At least one circumferential sealing element is arranged on the axial end faces of the sheet metal segments, in the axial direction between the sheet metal segments and in the radial direction between the lateral surface of the rotor shaft and an outer lateral surface of the laminated core.
  • At least one spacer element is formed or arranged on the axial end faces of the sheet metal segments, in the axial direction between the sheet metal segments and in the radial direction between the sealing element and the outer lateral surface of the laminated core.
  • the sheet metal segments each have at least two sheets, the sheets each having an embossing, namely at least one depression and an elevation, the individual sheets within a sheet metal segment being lined up axially in such a way that the elevation of a sheet into the recess of one further sheet metal engages, the sheet metal segments being positioned on the rotor shaft rotated relative to one another at an angle about the axis of rotation, so that an elevation of a sheet of one sheet metal segment does not reach into the recess of a sheet of another sheet metal segment and thus forms the spacer element.
  • the sealing element is preferably annular.
  • the annular sealing element is formed by a sealing cord or an O-ring.
  • the sealing element can be designed as a sprayed-on seal.
  • the sprayed seal is preferably made of a thermoplastic elastomer.
  • Fig. 1 shows a cross section of a first embodiment variant of a rotor.
  • Fig. 2 shows schematically a side view of a rotor with a
  • Sheet metal package comprising two sheet metal segments according to FIG. 1.
  • Fig. 3 shows a cross section of a second embodiment variant of a rotor.
  • Fig. 4 shows schematically a side view of a rotor with a laminated core comprising two sheet metal segments according to Fig. 3.
  • FIG. 1 shows a cross section of a rotor 1 in a first embodiment variant.
  • Fig. 2 shows schematically the rotor 1 from Fig. 1 in a side view.
  • FIG. 3 shows a cross section of a rotor 1 in a second embodiment variant.
  • Fig. 4 shows schematically the rotor 1 from Fig. 3 in a side view.
  • the rotor 1 comprises a rotor shaft 2 with a non-circular, namely polygonal, cross section and a substantially hollow cylindrical laminated core 3 which is fixedly arranged on the rotor shaft 2 (Fig. 1 - Fig. 4).
  • the rotor shaft 2 is guided through the central opening of the hollow cylindrical laminated core 3 of the rotor 1.
  • the laminated core 3 comprises two essentially hollow cylindrical sheet metal segments 4a, 4b.
  • the sheet metal segments 4a, 4b are lined up in an axial direction with respect to a rotation axis 5 of the rotor 1 (Fig. 2, Fig. 4).
  • the direction specification “axial” therefore corresponds to a direction along or parallel to the axis of rotation 5 of the rotor 1.
  • the direction specification “radial” corresponds to a direction normal to the axis of rotation 5 of the rotor 1.
  • the rotor shaft 2 of the rotor 1 has a lateral surface 7.
  • the hollow cylindrical laminated core has an inner lateral surface 8 facing the lateral surface 7 of the rotor shaft 2 and an outer lateral surface 10 facing away from the lateral surface 7 of the rotor shaft 2.
  • the rotor 1 also has four coolant channels 6a, 6b, 6c, 6d that run axially with respect to the axis of rotation 5 of the rotor 1, the coolant channels 6a, 6b, 6c, 6d each passing through a lateral surface 7 of the rotor shaft 2 and the inner lateral surface 8 of the laminated core 3 is limited.
  • At least one annularly circumferential sealing element 11 is arranged on the axial end faces 9 of the sheet metal segments 4a, 4b, in the axial direction between the sheet metal segments 4a, 4b and in the radial direction between the lateral surface 7 of the rotor shaft 2 and an outer lateral surface 10 of the laminated core 3
  • the sheet metal segments 4a, 4b each have several sheets.
  • the sealing element 11 shown in the first embodiment variant is formed by a sprayed-on seal made of a thermoplastic elastomer (Fig.
  • the sealing element 11 shown in the second embodiment variant is formed by a sealing cord (Fig. 3, Fig. 4).
  • At least one spacer element 12 is formed.
  • the sheets of the respective laminated core 4a, 4b each have an embossing.
  • An embossed sheet of metal shows as an embossing several depressions and several elevations 13.
  • An increase 13 requires a depression or vice versa.
  • the individual sheets are strung together to form a sheet segment 4a, 4b in such a way that the elevation 13 of one sheet engages in the recess of another sheet.
  • the sheet metal segments 4a, 4b are positioned on the rotor shaft 2 rotated at an angle about the axis of rotation 5 (FIG. 4), so that the elevations 13 of a sheet of a sheet metal segment 4a do not reach into the respective recesses of a sheet of another sheet metal segment 4b and these Elevations 13 each form spacer elements 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

Proposed is a rotor (1) for an electric machine, comprising a rotor shaft (2), a laminated core (3) arranged fixedly on the rotor shaft (2), wherein the laminated core (3) has at least two lamination segments (4a, 4b) which are next to each other in an axial direction in relation to an axis of rotation (5) of the rotor (1), and at least one coolant channel (6a, 6b, 6c, 6d) which extends axially in relation to the axis of rotation (5) of the rotor (1), wherein the coolant channel (6a, 6b, 6c, 6d) is delimited at least in part by a lateral surface (7) of the rotor shaft (2) and an inner lateral surface (8) of the laminated core (3), wherein at least one encircling sealing element (11) is arranged on axial faces (9) of the lamination segments (4a, 4b), between the lamination segments (4a, 4b) as viewed in an axial direction and between the lateral surface (7) of the rotor shaft (2) and an outer lateral surface (10) of the laminated core (3) as viewed in a radial direction.

Description

Rotor mit einem Kühlmittelkanal für eine elektrische Maschine Rotor with a coolant channel for an electric machine
Gebiet der Erfindung Field of invention
Die vorliegende Erfindung betrifft einen Rotor für eine elektrische Maschine umfassend eine Rotorwelle, ein auf der Rotorwelle fest angeordnetes Blechpaket, wobei das Blechpaket zumindest zwei Blechsegmente aufweist, die in einer bezüglich einer Rotationsachse des Rotors axialen Richtung aneinandergereiht sind, sowie zumindest einen bezüglich der Rotationsachse des Rotors axial verlaufenden Kühlmittelkanal, wobei der Kühlmittelkanal zumindest bereichsweise durch eine Mantelfläche der Rotorwelle und eine innere Mantelfläche des Blechpakets begrenzt ist. The present invention relates to a rotor for an electrical machine comprising a rotor shaft, a laminated core fixedly arranged on the rotor shaft, the laminated core having at least two laminated metal segments which are lined up in an axial direction with respect to an axis of rotation of the rotor, and at least one with respect to the axis of rotation of the Rotor axially extending coolant channel, wherein the coolant channel is at least partially delimited by a lateral surface of the rotor shaft and an inner lateral surface of the laminated core.
Stand der Technik State of the art
Elektrische Maschinen der oben genannten Art dienen der Energiewandlung von elektrischer in mechanischer Energie und umgekehrt und werden als Motor und/oder Generator vielfach im Bereich der Kraftfahrzeugtechnik eingesetzt. Electrical machines of the type mentioned above are used to convert energy from electrical to mechanical energy and vice versa and are often used as motors and/or generators in the field of automotive technology.
Elektrische Maschinen umfassen einen feststehenden Stator und einen beweglichen Rotor, wobei der Rotor in der gängigsten Bauform einer elektrischen Maschine drehbar innerhalb eines ringförmig bzw. hohlzylinderförmig ausgebildeten Stators gelagert ist. Electrical machines include a fixed stator and a movable rotor, with the rotor in the most common design of an electrical machine being rotatably mounted within an annular or hollow cylindrical stator.
Elektrische Maschinen erzeugen aufgrund des dielektrischen Verlusts während ihres Betriebs Wärme, was zum einen eine Verschlechterung des Wirkungsgrads der elektrischen Maschine bewirkt und zum anderen einen zuverlässigen Betrieb der elektrischen Maschine über ihre Lebensdauer negativ beeinflusst. Deshalb ist in Antriebsanordnungen mit elektrischen Maschinen in der Regel eine Kühlvorrichtung vorgesehen, die die zu kühlenden Teile der elektrischen Maschine kühlt. Due to the dielectric loss, electrical machines generate heat during their operation, which, on the one hand, causes a deterioration in the efficiency of the electrical machine and, on the other hand, negatively affects the reliable operation of the electrical machine over its service life. Therefore In drive arrangements with electrical machines, a cooling device is usually provided which cools the parts of the electrical machine to be cooled.
Konventionelle Kühlungen für elektrische Maschinen bedienen sich eines zirkulierenden gasförmigen oder flüssigen Kühlmittels, das aufgrund seiner Wärmekapazität die Wärme aufnimmt und diese abtransportiert. Das Kühlmittel zirkuliert beispielsweise in einem Gehäuse der elektrischen Maschine oder in einer als Hohlwelle ausgeführten Rotorwelle. Ein weiteres Konzept zur Kühlmittelführung stellt die „Reverse Rotor Cooling Technology“ dar, bei der axiale Kühlkanäle direkt durch die Rotorwelle und ein auf der Rotorwelle fest angeordnetes Blechpaket des Rotors ausgebildet werden. Conventional cooling systems for electrical machines use a circulating gaseous or liquid coolant, which absorbs heat and transports it away due to its heat capacity. The coolant circulates, for example, in a housing of the electrical machine or in a rotor shaft designed as a hollow shaft. Another concept for coolant routing is “Reverse Rotor Cooling Technology”, in which axial cooling channels are formed directly through the rotor shaft and a rotor laminated core that is permanently arranged on the rotor shaft.
Das Blechpaket des Rotors weist in der Regel mehrere Blechsegmente auf, die wiederum mehrere einzelne Elektrobleche umfassen. Abhängig vom „Stacking- Verfahren“ sind die Elektrobleche eines Blechsegments zueinander vercrimpt oder verklebt. Die einzelnen Blechsegmente sind zueinander „nur“ gestapelt. Aufgrund der Toleranzlage, dem Widerstand beim Aufpressprozess, dem Rückfedereffekt der Blechsegmente und auch dem Auffächern im Betrieb des Rotors ergeben sich zwischen den Blechsegmenten des Blechpakets Luftspalte. Bei Anwendung der „Reverse Rotor Cooling Technology“ führen diese Luftspalte zu radialen Undichtigkeiten, wodurch das Kühlmittel im Betrieb radial ausgeschleudert wird. The laminated core of the rotor usually has several laminated metal segments, which in turn comprise several individual electrical sheets. Depending on the “stacking process”, the electrical sheets of a sheet segment are crimped or glued to one another. The individual sheet metal segments are “just” stacked together. Due to the tolerance position, the resistance during the pressing process, the springback effect of the sheet metal segments and also the fanning out during operation of the rotor, air gaps arise between the sheet metal segments of the sheet metal package. When “Reverse Rotor Cooling Technology” is used, these air gaps lead to radial leaks, causing the coolant to be ejected radially during operation.
Zusammenfassung der Erfindung Summary of the invention
Es ist eine Aufgabe der Erfindung einen verbesserten Rotor für eine elektrische Maschine darzustellen. It is an object of the invention to provide an improved rotor for an electrical machine.
Dieser Bedarf kann durch den Gegenstand der vorliegenden Erfindung gemäß dem unabhängigen Anspruch 1 gedeckt werden. Vorteilhafte Ausführungsformen der vorliegenden Erfindung sind in den abhängigen Ansprüchen beschrieben. This need can be met by the subject matter of the present invention according to independent claim 1. Advantageous embodiments of the present invention are described in the dependent claims.
Der erfindungsgemäße Rotor für eine elektrische Maschine umfasst eine Rotorwelle, ein auf der Rotorwelle fest angeordnetes Blechpaket, wobei das Blechpaket zumindest zwei Blechsegmente aufweist, die in einer bezüglich einer Rotationsachse des Rotors axialen Richtung aneinandergereiht sind, sowie zumindest einen bezüglich der Rotationsachse des Rotors axial verlaufenden Kühlmittelkanal, wobei der Kühlmittelkanal zumindest bereichsweise durch eine Mantelfläche der Rotorwelle und eine innere Mantelfläche des Blechpakets begrenzt ist. The rotor according to the invention for an electrical machine comprises a rotor shaft, a laminated core fixedly arranged on the rotor shaft, the laminated core having at least two laminated metal segments which are lined up in an axial direction with respect to an axis of rotation of the rotor, and at least one that extends axially with respect to the axis of rotation of the rotor Coolant channel, wherein the coolant channel is at least partially delimited by a lateral surface of the rotor shaft and an inner lateral surface of the laminated core.
Das Blechpaket des Rotors und somit die einzelnen Blechsegmente sind im Wesentlichen hohlzylinderförmig ausgebildet und weisen eine der Mantelfläche der Rotorwelle zugewandte innere Mantelfläche und eine der Mantelfläche der Rotorwelle abgewandte äußere Mantelfläche auf. The laminated core of the rotor and thus the individual laminated segments are essentially hollow cylindrical and have an inner lateral surface facing the lateral surface of the rotor shaft and an outer lateral surface facing away from the lateral surface of the rotor shaft.
An den axialen Stirnflächen der Blechsegmente, in axialer Richtung zwischen den Blechsegmenten und in radialer Richtung zwischen der Mantelfläche Rotorwelle und einer äußeren Mantelfläche des Blechpakets, ist gemäß der vorliegenden Erfindung zumindest ein umlaufendes Dichtelement angeordnet. According to the present invention, at least one circumferential sealing element is arranged on the axial end faces of the sheet metal segments, in the axial direction between the sheet metal segments and in the radial direction between the lateral surface of the rotor shaft and an outer lateral surface of the laminated core.
Besonders bevorzugt ist an den axialen Stirnflächen der Blechsegmente, in axialer Richtung zwischen den Blechsegmenten und in radialer Richtung zwischen dem Dichtelement und der äußeren Mantelfläche des Blechpakets, zumindest ein Abstandhalterelement ausgebildet oder angeordnet. Particularly preferably, at least one spacer element is formed or arranged on the axial end faces of the sheet metal segments, in the axial direction between the sheet metal segments and in the radial direction between the sealing element and the outer lateral surface of the laminated core.
In einer besonders bevorzugten Ausführungsvariante der vorliegenden Erfindung weisen die Blechsegmente jeweils zumindest zwei Bleche auf, wobei die Bleche jeweils eine Prägung, nämlich zumindest eine Vertiefung und eine Erhöhung aufweisen, wobei die einzelnen Bleche innerhalb eines Blechsegments derart axial aneinandergereiht sind, dass die Erhöhung eines Bleches in die Vertiefung eines weiteren Bleches greift, wobei die Blechsegmente zueinander um einen Winkel um die Rotationsachse verdreht auf der Rotorwelle positioniert sind, so dass eine Erhöhung eines Bleches eines Blechsegments nicht in die Vertiefung eines Bleches eines weiteren Blechsegments greift und so das Abstandhalterelement ausbildet. In a particularly preferred embodiment variant of the present invention, the sheet metal segments each have at least two sheets, the sheets each having an embossing, namely at least one depression and an elevation, the individual sheets within a sheet metal segment being lined up axially in such a way that the elevation of a sheet into the recess of one further sheet metal engages, the sheet metal segments being positioned on the rotor shaft rotated relative to one another at an angle about the axis of rotation, so that an elevation of a sheet of one sheet metal segment does not reach into the recess of a sheet of another sheet metal segment and thus forms the spacer element.
Das Dichtelement ist vorzugsweise ringförmig ausgebildet. The sealing element is preferably annular.
Das ringförmige Dichtelement ist durch eine Dichtschnur oder einen O-Ring ausgebildet. The annular sealing element is formed by a sealing cord or an O-ring.
Weiterhin kann das Dichtelement als eine aufgespritzte Dichtung ausgeführt sein. Furthermore, the sealing element can be designed as a sprayed-on seal.
Die aufgespritzte Dichtung ist vorzugsweise aus einem thermoplastischen Elastomer gefertigt. The sprayed seal is preferably made of a thermoplastic elastomer.
Kurzbeschreibung der Zeichnungen Brief description of the drawings
Die Erfindung wird im Folgenden beispielhaft unter Bezugnahme auf die Zeichnungen beschrieben. The invention is described below by way of example with reference to the drawings.
Fig. 1 zeigt einen Querschnitt einer ersten Ausführungsvariante eines Rotors. Fig. 1 shows a cross section of a first embodiment variant of a rotor.
Fig. 2 zeigt schematisch eine Seitenansicht eines Rotors mit einemFig. 2 shows schematically a side view of a rotor with a
Blechpaket umfassend zwei Blechsegmente gemäß Fig. 1. Sheet metal package comprising two sheet metal segments according to FIG. 1.
Fig. 3 zeigt einen Querschnitt einer zweiten Ausführungsvariante eines Rotors. Fig. 4 zeigt schematisch eine Seitenansicht eines Rotors mit einem Blechpaket umfassend zwei Blechsegmente gemäß Fig. 3. Fig. 3 shows a cross section of a second embodiment variant of a rotor. Fig. 4 shows schematically a side view of a rotor with a laminated core comprising two sheet metal segments according to Fig. 3.
Detaillierte Beschreibung der Erfindung Detailed description of the invention
In Fig. 1 ist ein Querschnitt eines Rotors 1 in einer ersten Ausführungsvariante dargestellt. Fig. 2 zeigt schematisch den Rotor 1 aus Fig. 1 in einer Seitenansicht. 1 shows a cross section of a rotor 1 in a first embodiment variant. Fig. 2 shows schematically the rotor 1 from Fig. 1 in a side view.
In Fig. 3 ist ein Querschnitt eines Rotors 1 in einer zweiten Ausführungsvariante dargestellt. Fig. 4 zeigt schematisch den Rotor 1 aus Fig. 3 in einer Seitenansicht. 3 shows a cross section of a rotor 1 in a second embodiment variant. Fig. 4 shows schematically the rotor 1 from Fig. 3 in a side view.
Im Folgenden werden die gemeinsamen technischen Merkmale der beiden Ausführungsvananten beschreiben. Auf für die jeweilige Ausführungsvariante spezifische Merkmale wird danach eingegangen. The common technical features of the two versions are described below. Features specific to each embodiment variant will then be discussed.
Der Rotor 1 umfasst eine Rotorwelle 2 mit einem nicht-kreisförmigen, nämlich polygonen, Querschnitt und ein auf der Rotorwelle 2 fest angeordnetes, im Wesentlichen hohlzylinderförmiges Blechpaket 3 (Fig. 1 - Fig. 4). Die Rotorwelle 2 ist durch die zentrale Öffnung des hohlzylinderförmigen Blechpakets 3 des Rotors 1 geführt. The rotor 1 comprises a rotor shaft 2 with a non-circular, namely polygonal, cross section and a substantially hollow cylindrical laminated core 3 which is fixedly arranged on the rotor shaft 2 (Fig. 1 - Fig. 4). The rotor shaft 2 is guided through the central opening of the hollow cylindrical laminated core 3 of the rotor 1.
Das Blechpaket 3 umfasst zwei im Wesentlichen hohlzylinderförmige Blechsegmente 4a, 4b. Die Blechsegmente 4a, 4b sind in einer in Bezug auf eine Rotationsachse 5 des Rotors 1 axialen Richtung aneinandergereiht (Fig. 2, Fig. 4). The laminated core 3 comprises two essentially hollow cylindrical sheet metal segments 4a, 4b. The sheet metal segments 4a, 4b are lined up in an axial direction with respect to a rotation axis 5 of the rotor 1 (Fig. 2, Fig. 4).
Die Richtungsangabe „axial“ entspricht somit einer Richtung entlang oder parallel zu der Rotationsachse 5 des Rotors 1 . Die Richtungsangabe „radial“ entspricht einer Richtung normal zu der Rotationsachse 5 des Rotors 1 . Die Rotorwelle 2 des Rotors 1 weist eine Mantelfläche 7 auf. Das hohlzylinderförmige Blechpaket weist eine der Mantelfläche 7 der Rotorwelle 2 zugewandte innere Mantelfläche 8 und eine der Mantelfläche 7 der Rotorwelle 2 abgewandte äußere Mantelfläche 10 auf. The direction specification “axial” therefore corresponds to a direction along or parallel to the axis of rotation 5 of the rotor 1. The direction specification “radial” corresponds to a direction normal to the axis of rotation 5 of the rotor 1. The rotor shaft 2 of the rotor 1 has a lateral surface 7. The hollow cylindrical laminated core has an inner lateral surface 8 facing the lateral surface 7 of the rotor shaft 2 and an outer lateral surface 10 facing away from the lateral surface 7 of the rotor shaft 2.
Der Rotor 1 weist zudem vier bezüglich der Rotationsachse 5 des Rotors 1 axial verlaufende Kühlmittelkanäle 6a, 6b, 6c, 6d auf, wobei die Kühlmittelkanäle 6a, 6b, 6c, 6d jeweils durch eine Mantelfläche 7 der Rotorwelle 2 und die innere Mantelfläche 8 des Blechpakets 3 begrenzt ist. The rotor 1 also has four coolant channels 6a, 6b, 6c, 6d that run axially with respect to the axis of rotation 5 of the rotor 1, the coolant channels 6a, 6b, 6c, 6d each passing through a lateral surface 7 of the rotor shaft 2 and the inner lateral surface 8 of the laminated core 3 is limited.
An den axialen Stirnflächen 9 der Blechsegmente 4a, 4b, in axialer Richtung zwischen den Blechsegmenten 4a, 4b und in radialer Richtung zwischen der Mantelfläche 7 Rotorwelle 2 und einer äußeren Mantelfläche 10 des Blechpakets 3, ist zumindest ein ringförmig umlaufendes Dichtelement 11 angeordnet At least one annularly circumferential sealing element 11 is arranged on the axial end faces 9 of the sheet metal segments 4a, 4b, in the axial direction between the sheet metal segments 4a, 4b and in the radial direction between the lateral surface 7 of the rotor shaft 2 and an outer lateral surface 10 of the laminated core 3
(Fig. 1 - Fig. 4). Die Blechsegmente 4a, 4b weisen jeweils mehrere Bleche auf. (Fig. 1 - Fig. 4). The sheet metal segments 4a, 4b each have several sheets.
Das in der ersten Ausführungsvariante dargestellte Dichtelement 11 ist durch eine aufgespritzte Dichtung aus einem thermoplastischen Elastomer ausgebildet (Fig. The sealing element 11 shown in the first embodiment variant is formed by a sprayed-on seal made of a thermoplastic elastomer (Fig.
1 , Fig. 2). 1, Fig. 2).
Das in der zweiten Ausführungsvariante dargestellte Dichtelement 11 ist durch eine Dichtschnur ausgebildet (Fig. 3, Fig. 4). The sealing element 11 shown in the second embodiment variant is formed by a sealing cord (Fig. 3, Fig. 4).
In der zweiten Ausführungsvariante des Rotors 1 gemäß Fig. 3 und Fig. 4 ist an den axialen Stirnflächen 9 der Blechsegmente 4a, 4b, in axialer Richtung zwischen den Blechsegmenten 4a, 4b und in radialer Richtung zwischen dem Dichtelement 11 und der äußeren Mantelfläche 10 des Blechpakets 3, zumindest ein Abstandhalterelement 12 ausgebildet. Die Bleche des jeweiligen Blechpakets 4a, 4b weisen jeweils eine Prägung auf. Ein geprägtes Blech weist als Prägung mehrere Vertiefungen und mehrere Erhöhungen 13 auf. Eine Erhöhung 13 bedingt dabei jeweils eine Vertiefung bzw. umgekehrt. Die einzelnen Bleche sind dabei derart zu einem Blechsegment 4a, 4b aneinandergereiht, dass die Erhöhung 13 eines Bleches in die Vertiefung eines weiteren Bleches greift. Die Blechsegmente 4a, 4b sind zueinander um einen Winkel um die Rotationsachse 5 verdreht auf der Rotorwelle 2 positioniert (Fig. 4), so dass die Erhöhungen 13 eines Bleches eines Blechsegments 4a nicht in die jeweiligen Vertiefungen eines Bleches eines weiteren Blechsegments 4b greifen und diese Erhöhungen 13 so jeweils Abstandhalterelemente 12 ausbilden. In the second embodiment variant of the rotor 1 according to FIGS Laminated core 3, at least one spacer element 12 is formed. The sheets of the respective laminated core 4a, 4b each have an embossing. An embossed sheet of metal shows as an embossing several depressions and several elevations 13. An increase 13 requires a depression or vice versa. The individual sheets are strung together to form a sheet segment 4a, 4b in such a way that the elevation 13 of one sheet engages in the recess of another sheet. The sheet metal segments 4a, 4b are positioned on the rotor shaft 2 rotated at an angle about the axis of rotation 5 (FIG. 4), so that the elevations 13 of a sheet of a sheet metal segment 4a do not reach into the respective recesses of a sheet of another sheet metal segment 4b and these Elevations 13 each form spacer elements 12.
Bezuqszeichenliste Reference character list
1 Rotor 1 rotor
2 Rotorwelle 2 rotor shaft
3 Blechpaket 3 sheet metal package
4a, 4b Blechsegment 4a, 4b sheet metal segment
5 Rotationsachse 5 axis of rotation
6a, 6b, 6c, 6d Kühlmittelkanal 6a, 6b, 6c, 6d coolant channel
7 Mantelfläche der Rotorwelle 7 lateral surface of the rotor shaft
8 Innere Mantelfläche des Blechpakets8 Inner lateral surface of the laminated core
9 Axiale Stirnflächen der Blechsegmente9 Axial end faces of the sheet metal segments
10 Äußere Mantelfläche des Blechpakets10 Outer surface of the laminated core
11 Dichtelement 11 sealing element
12 Abstandhalterelement 12 spacer element
13 Erhöhung 13 increase

Claims

Patentansprüche Rotor (1 ) für eine elektrische Maschine umfassend eine Rotorwelle (2), ein auf der Rotorwelle (2) fest angeordnetes Blechpaket (3), wobei das Blechpaket (3) zumindest zwei Blechsegmente (4a, 4b) aufweist, die in einer bezüglich einer Rotationsachse (5) des Rotors (1) axialen Richtung aneinandergereiht sind, sowie zumindest einen bezüglich der Rotationsachse (5) des Rotors (1 ) axial verlaufenden Kühlmittelkanal (6a, 6b, 6c, 6d), wobei der Kühlmittelkanal (6a, 6b, 6c, 6d) zumindest bereichsweise durch eine Mantelfläche (7) der Rotorwelle (2) und eine innere Mantelfläche (8) des Blechpakets (3) begrenzt ist, wobei an axialen Stirnflächen (9) der Blechsegmente (4a, 4b), in axialer Richtung zwischen den Blechsegmenten (4a, 4b) und in radialer Richtung zwischen der Mantelfläche (7) der Rotorwelle Claims Rotor (1) for an electrical machine comprising a rotor shaft (2), a laminated core (3) fixedly arranged on the rotor shaft (2), the laminated core (3) having at least two laminated segments (4a, 4b) which are in one respect an axis of rotation (5) of the rotor (1) are lined up in the axial direction, and at least one coolant channel (6a, 6b, 6c, 6d) which runs axially with respect to the axis of rotation (5) of the rotor (1), wherein the coolant channel (6a, 6b, 6c, 6d) is limited at least in some areas by a lateral surface (7) of the rotor shaft (2) and an inner lateral surface (8) of the laminated core (3), whereby on axial end faces (9) of the sheet metal segments (4a, 4b), in the axial direction between the sheet metal segments (4a, 4b) and in the radial direction between the lateral surface (7) of the rotor shaft
(2) und einer äußeren Mantelfläche (10) des Blechpakets (3), zumindest ein umlaufendes Dichtelement (11) angeordnet ist. Rotor (1 ) nach Anspruch 1 , d a d u r c h g e k e n n z e i c h n e t , dass an den axialen Stirnflächen (9) der Blechsegmente (4a, 4b), in axialer Richtung zwischen den Blechsegmenten (4a, 4b) und in radialer Richtung zwischen dem Dichtelement (11) und der äußeren Mantelfläche (10) des Blechpakets (2) and an outer lateral surface (10) of the laminated core (3), at least one circumferential sealing element (11) is arranged. Rotor (1) according to claim 1, so that on the axial end faces (9) of the sheet metal segments (4a, 4b), in the axial direction between the sheet metal segments (4a, 4b) and in the radial direction between the sealing element (11) and the outer Lateral surface (10) of the laminated core
(3), zumindest ein Abstandhalterelement (12) ausgebildet oder angeordnet ist. Rotor (1 ) nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , dass die Blechsegmente (4a, 4b) jeweils zumindest zwei Bleche umfassen, wobei die Bleche eine Prägung, nämlich zumindest eine Vertiefung und eine Erhöhung (13) aufweisen, wobei die einzelnen Bleche innerhalb eines Blechsegments (4a, 4b)derart axial aneinandergereiht sind, dass die Erhöhung (13) eines Bleches in die Vertiefung eines weiteren Bleches greift, wobei die Blechsegmente (4a, 4b) zueinander um einen Winkel um die Rotationsachse (5) verdreht auf der Rotorwelle (2) positioniert sind, so dass eine Erhöhung (13) eines Bleches eines Blechsegments (4a) nicht in die Vertiefung eines Bleches eines weiteren Blechsegments (4b) greift und so das Abstandhalterelement (12) ausbildet. (3), at least one spacer element (12) is formed or arranged. Rotor (1) according to claim 2, characterized in that the sheet metal segments (4a, 4b) each comprise at least two sheets, the sheets having an embossing, namely at least one depression and one elevation (13). have, the individual sheets within a sheet metal segment (4a, 4b) being lined up axially in such a way that the elevation (13) of one sheet engages in the recess of another sheet, the sheet metal segments (4a, 4b) relative to one another at an angle about the axis of rotation (5) are positioned twisted on the rotor shaft (2) so that an elevation (13) of a sheet of a sheet segment (4a) does not engage in the recess of a sheet of another sheet segment (4b) and thus forms the spacer element (12).
4. Rotor (1) nach Anspruch 1 , 2 oder 3, d a d u r c h g e k e n n z e i c h n e t , dass das Dichtelement (11) ringförmig ist. 4. Rotor (1) according to claim 1, 2 or 3, characterized in that the sealing element (11) is annular.
5. Rotor (1 ) nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass das Dichtelement (11 ) eine Dichtschnur ist. 5. Rotor (1) according to one of claims 1 to 4, characterized in that the sealing element (11) is a sealing cord.
6. Rotor (1 ) nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass das Dichtelement (11 ) ein O-Ring ist. 6. Rotor (1) according to one of claims 1 to 4, characterized in that the sealing element (11) is an O-ring.
7. Rotor (1 ) nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , dass das Dichtelement (11) eine aufgespritzte Dichtung ist. 7. Rotor (1) according to one of claims 1 to 4, characterized in that the sealing element (11) is a sprayed-on seal.
8. Rotor (1 ) nach Anspruch 7, d a d u r c h g e k e n n z e i c h n e t , dass die aufgespritzte Dichtung aus einem thermoplastischen Elastomer besteht. 8. Rotor (1) according to claim 7, so that the sprayed seal consists of a thermoplastic elastomer.
PCT/EP2023/069256 2022-07-25 2023-07-12 Rotor having a coolant channel for an electric machine WO2024022810A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022207569.2 2022-07-25
DE102022207569.2A DE102022207569B4 (en) 2022-07-25 2022-07-25 Rotor with a coolant channel for an electric machine

Publications (1)

Publication Number Publication Date
WO2024022810A1 true WO2024022810A1 (en) 2024-02-01

Family

ID=87312172

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/069256 WO2024022810A1 (en) 2022-07-25 2023-07-12 Rotor having a coolant channel for an electric machine

Country Status (2)

Country Link
DE (1) DE102022207569B4 (en)
WO (1) WO2024022810A1 (en)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220904A (en) * 1983-05-31 1984-12-12 Yaskawa Electric Mfg Co Ltd Forming method for iron core
US20110000079A1 (en) * 2006-02-08 2011-01-06 Kenichiro Fukumaru Rotor Manufacturing Method
US20140054985A1 (en) * 2011-02-24 2014-02-27 Andritz Ritz Gmbh Internally exicted synchronous motor comprising a permanent magnet rotor with multiple corrosion protection
US20150318770A1 (en) * 2012-11-02 2015-11-05 Volkswagen Aktiengesellschaft Polymer-based layer structure with an oleophobic/hydrophobic surface, and electric machine comprising such a layer structure
DE102017214486A1 (en) * 2017-08-21 2019-02-21 Zf Friedrichshafen Ag Stackable heat sink module
EP3234968B1 (en) * 2014-12-16 2019-04-10 Fraunhofer Gesellschaft zur Förderung der Angewand Method for producing a device having a three-dimensional magnetic structure
CN208955865U (en) * 2019-04-24 2019-06-07 新誉轨道交通科技有限公司 Ex 'e' motor and its rotor structure
EP3514926A1 (en) * 2018-01-18 2019-07-24 voestalpine Automotive Components Dettingen GmbH & Co. KG Method for connecting sheet metal to a stack of sheets
US20210060917A1 (en) * 2018-01-18 2021-03-04 voestalpine Automotive Components Dettingen GmbH & Co. KG Method for connecting lamination parts
CN112470366A (en) * 2018-07-25 2021-03-09 蒂森克虏伯股份公司 Rotor, electric motor, method for producing a rotor, and use of a rotor and an electric motor
DE102019133532A1 (en) * 2019-12-09 2021-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor for an electrical machine, electrical machine, motor vehicle
US20220231558A1 (en) * 2019-05-21 2022-07-21 Schaeffler Technologies AG & Co. KG Rotor with an optimized rotor laminate geometry for fluid guidance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE103236C (en)
US925271A (en) 1906-08-31 1909-06-15 Allis Chalmers Core-spacing member for dynamo-electric machines.
JP2002325394A (en) 2001-04-26 2002-11-08 Nissan Motor Co Ltd Armature
US20130278091A1 (en) 2010-12-22 2013-10-24 Ihi Corporation Rotary machine
DE102013010249A1 (en) 2013-06-13 2014-12-18 Kienle + Spiess Gmbh Stator / rotor plate for stator / rotor packages of generators and electric motors, stator / rotor assembly with such a stator / rotor plate and method for producing a stator / rotor plate
DE102017128312A1 (en) 2017-11-29 2019-05-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor arrangement for an electric motor

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220904A (en) * 1983-05-31 1984-12-12 Yaskawa Electric Mfg Co Ltd Forming method for iron core
US20110000079A1 (en) * 2006-02-08 2011-01-06 Kenichiro Fukumaru Rotor Manufacturing Method
US20140054985A1 (en) * 2011-02-24 2014-02-27 Andritz Ritz Gmbh Internally exicted synchronous motor comprising a permanent magnet rotor with multiple corrosion protection
US20150318770A1 (en) * 2012-11-02 2015-11-05 Volkswagen Aktiengesellschaft Polymer-based layer structure with an oleophobic/hydrophobic surface, and electric machine comprising such a layer structure
EP3234968B1 (en) * 2014-12-16 2019-04-10 Fraunhofer Gesellschaft zur Förderung der Angewand Method for producing a device having a three-dimensional magnetic structure
DE102017214486A1 (en) * 2017-08-21 2019-02-21 Zf Friedrichshafen Ag Stackable heat sink module
EP3514926A1 (en) * 2018-01-18 2019-07-24 voestalpine Automotive Components Dettingen GmbH & Co. KG Method for connecting sheet metal to a stack of sheets
US20210060917A1 (en) * 2018-01-18 2021-03-04 voestalpine Automotive Components Dettingen GmbH & Co. KG Method for connecting lamination parts
CN112470366A (en) * 2018-07-25 2021-03-09 蒂森克虏伯股份公司 Rotor, electric motor, method for producing a rotor, and use of a rotor and an electric motor
CN208955865U (en) * 2019-04-24 2019-06-07 新誉轨道交通科技有限公司 Ex 'e' motor and its rotor structure
US20220231558A1 (en) * 2019-05-21 2022-07-21 Schaeffler Technologies AG & Co. KG Rotor with an optimized rotor laminate geometry for fluid guidance
DE102019133532A1 (en) * 2019-12-09 2021-06-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor for an electrical machine, electrical machine, motor vehicle

Also Published As

Publication number Publication date
DE102022207569A1 (en) 2024-01-25
DE102022207569B4 (en) 2024-02-08

Similar Documents

Publication Publication Date Title
WO2013075783A2 (en) Electrical machine
DE112014007129T5 (en) A stator core for a rotary electric machine, a rotary electric machine, and a method of manufacturing a rotary electric machine
DE2936020A1 (en) ELECTRIC MACHINE
DE10153578A1 (en) AC generator for vehicles with permanent magnets in the rotor and method for producing the same
WO2021069132A1 (en) Electrical machine with bypass cooling duct
DE102015225946A1 (en) Rotating electric machine for a vehicle
DE112006003837T5 (en) DC motor
WO2019215097A1 (en) Mehtod for producing a winding for a stator of an electrical machine and electrical machine
DE102014217289A1 (en) Winding arrangement and method for producing a winding arrangement
WO2024022810A1 (en) Rotor having a coolant channel for an electric machine
DE102016223084A1 (en) Slat for a rotor or stator of an electric machine and rotor or stator with the slat
DE2027923A1 (en) Dynamo-electric machine
EP4191838A1 (en) Rotor for an electric machine having a radial cooling channel in the laminated core
DE102020109482B4 (en) A method for producing a stator for an electrical machine, a corresponding stator and a method for operating an electrical machine, a corresponding stator and a method for operating an electrical machine
EP1850463B1 (en) Method and device for manufacturing welded connections on the conductors of an electric machine
DE102020207913A1 (en) Stator of an electrical machine having an end winding cooling
DE102020122523A1 (en) Cooled rotor of an electrical machine
DE102010003246A1 (en) Transverse flux machine, has hydraulic terminal elements supplying and discharging medium and arranged such that hydraulic terminal elements are made to flow by cooling medium provided parallel to axis of rotation
EP3276797A1 (en) Rotor for an electric rotating machine
DE102020109980A1 (en) Electric machine stator and electric machine
WO2010069715A2 (en) Machine with a bearing device
DE102020200197A1 (en) Electric machine with a guide element
WO2024149505A1 (en) Permanent magnet rotor for an electric machine and method for producing such a rotor
WO2019171219A1 (en) Rotor unit and electric motor
EP4191839A1 (en) Rotor for an electric machine having an axial cooling channel in a laminated core

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: 23741673

Country of ref document: EP

Kind code of ref document: A1