WO2020229112A1 - Fluid pipe for a cooling water system of electric vehicles, electric vehicle and use of a fluid pipe - Google Patents

Fluid pipe for a cooling water system of electric vehicles, electric vehicle and use of a fluid pipe Download PDF

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Publication number
WO2020229112A1
WO2020229112A1 PCT/EP2020/061178 EP2020061178W WO2020229112A1 WO 2020229112 A1 WO2020229112 A1 WO 2020229112A1 EP 2020061178 W EP2020061178 W EP 2020061178W WO 2020229112 A1 WO2020229112 A1 WO 2020229112A1
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WO
WIPO (PCT)
Prior art keywords
fluid line
cooling water
wall surface
fluid
fluid pipe
Prior art date
Application number
PCT/EP2020/061178
Other languages
German (de)
French (fr)
Inventor
Hannes Clasen
Daniel Kintea
Original Assignee
Norma Germany Gmbh
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Application filed by Norma Germany Gmbh filed Critical Norma Germany Gmbh
Publication of WO2020229112A1 publication Critical patent/WO2020229112A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/006—Rigid pipes specially profiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/121—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting specially profiled cross sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the invention relates to a fluid line for a cooling water system of electric vehicles, an electric vehicle with such a fluid line and a use of such a fluid line.
  • fluid lines are used to transport cooling water between the various components of the electric vehicle. Due to the limited capacity of the energy storage systems, energy losses in the components of the electric vehicles should be avoided as far as possible. In fluid lines, energy losses can arise from the friction of the flowing fluid inside the fluid line, so that a pump that pumps the fluid through the fluid line has an increased energy requirement. It can therefore be seen as an object of the invention to provide a fluid line for an electric vehicle which brings about reduced friction between the fluid and the fluid line.
  • the fluid line for a cooling water system of electric vehicles, the fluid line having a flow channel for cooling water, which extends along a longitudinal axis of the Fluidlei device, and a line wall element with an inner wall surface, wherein the inner wall surface is arranged on the flow channel, is provided according to the invention that the inner wall surface comprises at least one rib element, the rib element extending from the inner wall surface into the flow channel.
  • the invention provides an element with which the tangential propagation of eddies in the flow of the fluid is reduced.
  • vortices arranged transversely to the direction of flow are reduced in the fluid flowing along the rib element and the overall level of turbulence is reduced.
  • This has the effect that the friction in the fluid is reduced, so that the friction losses in the fluid are reduced.
  • the pressure loss can thus be reduced, since in this way a pump can pump the fluid through the fluid line with little expenditure of energy, so that an energy saving is achieved.
  • This increases the range of the electric vehicle due to the energy of the energy store not being used by the pump.
  • the rib element can be produced in an inexpensive extrusion process during the production of the fluid line. In this way, the internal friction of the fluid in the fluid line can be reduced in a cost-effective manner.
  • Other manufacturing processes can also be used, such as B. laser structuring, embossing, or machining processes, etc.
  • the at least one rib element extends along the longitudinal axis on the inner wall surface.
  • the inner wall surface can have a multiplicity of rib elements, for example. In this way, the friction can be reduced in a larger area of the fluid.
  • the plurality of rib elements can be arranged distributed over the entire inner wall surface of the fluid line, so that a reduction in the friction in the fluid flowing through the flow channel is brought about on the entire inner wall surface.
  • the rib elements can be arranged in a circumferential direction around the longitudinal axis at a same distance from one another.
  • a reduction in friction in the fluid that is homogeneously distributed over the inner wall surface can thus take place. This favors a standardization of the flow velocity of the fluid along the inner wall surface, so that eddies in the fluid flow are reduced.
  • the rib elements can have a height in a direction perpendicular to the circumferential direction which is smaller than a distance between two rib elements.
  • the at least one rib element can have an angular, preferably triangular, cross-sectional shape in the circumferential direction. Ideally, the rib elements have no width and a very sharp edge.
  • the at least one rib element can alternatively have a cornerless cross-sectional shape in the circumferential direction.
  • the cooling water system has the fluid line.
  • 2 a-c show a schematic representation of various examples of rib elements
  • FIG. 3 shows a schematic representation of an electric vehicle.
  • a fluid line 10 for a cooling water system of electric vehicles is shown.
  • the fluid line 10 extends along a longitudinal axis 16.
  • the fluid line 10 further comprises a flow channel 14 for cooling water, which also extends along the longitudinal axis 16, as shown in the sectional view in Figure 1b.
  • the flow channel 14 is delimited by a line wall element 11 with an inner wall surface 18.
  • the Lei processing wall element 1 1 extends around the longitudinal axis 16 around.
  • the line wall element 11 also extends along the longitudinal axis 16 of the fluid line 10.
  • the inner wall surface 18 adjoins the flow channel 14 and delimits the flow channel 14 against the line wall element 11. Furthermore, the inner wall surface 18 has at least one rib element 12. According to FIG. 1 a, the inner wall surface 18 has a plurality of rib elements 12. Each rib element 12 extends from the inner wall surface 18 into the flow channel 14 and also extends along the longitudinal axis 16 on the inner wall surface 18. Channels are thus formed between the rib elements 12 that guide the fluid flowing in the flow channel 14 on the inner wall surface 18.
  • the rib elements 12 have a width 22 in a circumferential direction 20 around the longitudinal axis 16 and a height 32 in a direction perpendicular to the circumferential direction or a radial direction.
  • the height 32 is smaller than a distance 24 between two Rip penimplantation 12 formed.
  • the rib elements 12 are 20 ⁇ m in the circumferential direction the longitudinal axis 16 is all arranged at a distance 24 from one another and the result is a homogeneous distribution of the rib elements 12 in the circumferential direction 20.
  • the rib elements 12 can have an angular shape in a cross section along the circumferential direction 20 around the longitudinal axis 16 according to FIGS. 2a and 2b.
  • a rib element 12 has a square cross-sectional shape.
  • a rib element 12 alternatively has a triangular cross-sectional shape.
  • the rib member 12 has a minimum width and a sharp edge at the apex of the triangular cross-sectional shape. It should not be ruled out that the cross-sectional shape of a rib element 12 can have a shape with more than four corners.
  • the rib elements can have a cornerless shape in a cross section along the circumferential direction 20 around the longitudinal axis 16 according to FIG. 2c.
  • the cross-sectional shape of the rib element 12 can be designed as a half-wave according to FIG. 2c.
  • other cornerless cross-sectional shapes are also possible.
  • any cross-sectional shape of a rib element 12 can already be produced during the production of the fluid line 10.
  • the fluid line 10 can be produced, for example, by means of an extrusion process.
  • an extrusion tool is used for the flow channel 18 which has a geometry which forms the rib elements 12 on the inner wall surface 18 of the fluid line 10.
  • the rib elements 12 can be formed on the inner wall surface 18 during the extrusion of the fluid line 10. This accelerates and simplifies the production of the fluid line 10 with the rib elements 12 on the inner wall surface 18.
  • the rib elements 12 have the effect that eddies in a fluid which flows through the flow channel 14 cannot propagate on the inner wall surface 18 transversely to the circumferential direction 20. This reduces eddies in the flowing fluid and the Turbulenzni level drops. This lowers the resistance in the flowing fluid caused by the internal friction in the flowing fluid. A pressure drop in the fluid line 10 is thus reduced.
  • the fluid line 10 is used in a cooling water system 28 of an electric vehicle 26. This is shown in FIG.
  • An electric vehicle 26 includes a component 30 to be cooled, in the form of an accumulator, a computer and / or a Electric motor can be formed.
  • the electric vehicle 26 further comprises a cooling water system 28 with a pump which pumps the fluid through the fluid line 10.
  • the cooling water system 28 furthermore has the fluid line 10, the fluid line 10 connecting the cooling water system 28 to the component 30 to be cooled. Cooling water can thus be conducted from the cooling water system 28 to the component 30 to be cooled by means of the fluid line 10 in order to cool the component 30 to be cooled. Likewise, by means of a direct fluid line 10, the cooling water used can be passed from the component 30 to be cooled to the cooling water system 28 in order to close the cooling water circuit.
  • the energy consumption of the pump is reduced so that electrically operated vehicles in particular consume less energy, which increases the range of these vehicles.
  • the invention is not restricted to one of the embodiments described above, but can be modified in many ways.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The invention relates to a fluid pipe (10) for a cooling water system of electric vehicles, the fluid pipe (10) having a flow channel (14) for cooling water which extends along a longitudinal axis (16) of the fluid pipe (10), and a pipe wall element (11) having an inner wall surface (18). The inner wall surface (18) is arranged on the flow channel (14), the inner wall surface (18) having at least one rib element (12), and the rib element (12) extending from the inner wall surface (18) into the flow channel (14). By means of the invention, a fluid pipe (10) for an electric vehicle (26) is provided, which fluid pipe causes reduced friction between the fluid and the fluid pipe (10).

Description

Fluidleitung für ein Kühlwassersystem von elektrischen Fahrzeugen, Elektrisches Fahrzeug und Verwendung einer Fluidleitung Fluid line for a cooling water system of electric vehicles, electric vehicle and use of a fluid line
Die Erfindung betrifft eine Fluidleitung für ein Kühlwassersystem von elektrischen Fahrzeugen, ein elektrisches Fahrzeug mit einer derartigen Fluidleitung und eine Verwendung einer derarti gen Fluidleitung. The invention relates to a fluid line for a cooling water system of electric vehicles, an electric vehicle with such a fluid line and a use of such a fluid line.
In Kühlsystemen von elektrischen Fahrzeugen werden Fluidleitungen genutzt, um Kühlwasser zwischen den verschiedenen Komponenten des elektrischen Fahrzeugs zu transportieren. Auf Grund der begrenzten Kapazität der Energiespeichersysteme sollen Energieverluste in den Komponenten der elektrischen Fahrzeuge so weit möglich vermieden werden. In Fluidleitungen können dabei Energieverluste durch die Reibung des strömenden Fluids im Inneren der Fluid leitung entstehen, so dass eine Pumpe, die das Fluid durch die Fluidleitung pumpt, einen erhöh ten Energiebedarf aufweist. Als Aufgabe der Erfindung kann daher angesehen werden, eine Fluidleitung für ein elektrisches Fahrzeug bereitzustellen, die eine verringerte Reibung zwischen dem Fluid und der Fluidleitung bewirkt. In cooling systems of electric vehicles, fluid lines are used to transport cooling water between the various components of the electric vehicle. Due to the limited capacity of the energy storage systems, energy losses in the components of the electric vehicles should be avoided as far as possible. In fluid lines, energy losses can arise from the friction of the flowing fluid inside the fluid line, so that a pump that pumps the fluid through the fluid line has an increased energy requirement. It can therefore be seen as an object of the invention to provide a fluid line for an electric vehicle which brings about reduced friction between the fluid and the fluid line.
Hauptmerkmale der Erfindung sind in den Ansprüchen 1 , 8 und 9 angegeben. Ausgestaltungen sind Gegenstand der Ansprüche 2 bis 7. Main features of the invention are set out in claims 1, 8 and 9. Refinements are the subject of claims 2 to 7.
Bei einer Fluidleitung für ein Kühlwassersystem von elektrischen Fahrzeugen, wobei die Fluid leitung einen Strömungskanal für Kühlwasser, der sich entlang einer Längsachse der Fluidlei tung erstreckt, und ein Leitungswandelement mit einer Innenwandfläche aufweist, wobei die In nenwandfläche an dem Strömungskanal angeordnet ist, ist erfindungsgemäß vorgesehen, dass die Innenwandfläche mindestens ein Rippenelement aufweist, wobei das Rippenelement sich von der Innenwandfläche in den Strömungskanal erstreckt. In a fluid line for a cooling water system of electric vehicles, the fluid line having a flow channel for cooling water, which extends along a longitudinal axis of the Fluidlei device, and a line wall element with an inner wall surface, wherein the inner wall surface is arranged on the flow channel, is provided according to the invention that the inner wall surface comprises at least one rib element, the rib element extending from the inner wall surface into the flow channel.
Die Erfindung stellt mit dem Rippenelement an der Innenwandfläche ein Element bereit, mit dem die tangentiale Ausbreitung von Wirbeln in der Strömung des Fluids vermindert wird. Damit werden quer zur Strömungsrichtung angeordnete Wirbel im an dem Rippenelement entlang strömenden Fluid vermindert und das Gesamtturbulenzniveau reduziert. Dies bewirkt, dass die Reibung in dem Fluid verringert wird, so dass die Reibungsverluste im Fluid reduziert werden. Damit kann der Druckverlust verringert werden, da auf diese Weise eine Pumpe das Fluid mit geringem Energieaufwand durch die Fluidleitung pumpen kann, so dass eine Energieersparnis bewirkt wird. Dies erhöht die Reichweite des elektrischen Fahrzeugs auf Grund der nicht von der Pumpe verwendeten Energie des Energiespeichers. Weiter kann das Rippenelement wäh rend der Herstellung der Fluidleitung in einem kostengünstigen Extrusionsverfahren hergestellt werden. Damit kann auf kostengünstige Weise eine Reduktion der inneren Reibung des Fluids in der Fluidleitung bewirkt werden. Dabei können auch andere Herstellungsverfahren verwendet werden, wie z. B. Laserstrukturieren, Einprägen, oder spanende Verfahren, etc. With the rib element on the inner wall surface, the invention provides an element with which the tangential propagation of eddies in the flow of the fluid is reduced. In this way, vortices arranged transversely to the direction of flow are reduced in the fluid flowing along the rib element and the overall level of turbulence is reduced. This has the effect that the friction in the fluid is reduced, so that the friction losses in the fluid are reduced. The pressure loss can thus be reduced, since in this way a pump can pump the fluid through the fluid line with little expenditure of energy, so that an energy saving is achieved. This increases the range of the electric vehicle due to the energy of the energy store not being used by the pump. Furthermore, the rib element can be produced in an inexpensive extrusion process during the production of the fluid line. In this way, the internal friction of the fluid in the fluid line can be reduced in a cost-effective manner. Other manufacturing processes can also be used, such as B. laser structuring, embossing, or machining processes, etc.
Dabei kann vorgesehen sein, dass sich das mindestens eine Rippenelement entlang der Längs achse an der Innenwandfläche erstreckt. It can be provided that the at least one rib element extends along the longitudinal axis on the inner wall surface.
Dies vereinfacht die Herstellung des Rippenelements in Kombination mit der Fluidleitung weiter. Weiter kann die Innenwandfläche beispielsweise eine Vielzahl von Rippenelementen aufwei- sen. Auf diese Weise kann die Reibung in einem größeren Bereich des Fluids gesenkt werden. Die Vielzahl von Rippenelementen kann dabei über die gesamte Innenwandfläche der Fluidleitung verteilt angeordnet sein, so dass an der gesamten Innenwandfläche eine Reduktion der Rei bung in dem durch den Strömungskanal fließenden Fluid bewirkt wird. This further simplifies the manufacture of the rib element in combination with the fluid line. Furthermore, the inner wall surface can have a multiplicity of rib elements, for example. In this way, the friction can be reduced in a larger area of the fluid. The plurality of rib elements can be arranged distributed over the entire inner wall surface of the fluid line, so that a reduction in the friction in the fluid flowing through the flow channel is brought about on the entire inner wall surface.
Die Rippenelemente können in einer Umfangsrichtung um die Längsachse herum in einem glei chen Abstand zu einander angeordnet sein. The rib elements can be arranged in a circumferential direction around the longitudinal axis at a same distance from one another.
Damit kann eine über die Innenwandfläche homogen verteilte Verminderung der Reibung in dem Fluid erfolgen. Dies begünstigt eine Vereinheitlichung der Strömungsgeschwindigkeit des Fluids entlang der Innenwandfläche, so dass Wirbel in der Fluidströmung vermindert werden. A reduction in friction in the fluid that is homogeneously distributed over the inner wall surface can thus take place. This favors a standardization of the flow velocity of the fluid along the inner wall surface, so that eddies in the fluid flow are reduced.
Weiter können die Rippenelemente in einer senkrechten Richtung zur Umfangsrichtung eine Höhe aufweisen, die kleiner als ein Abstand zwischen zwei Rippenelementen ist. Furthermore, the rib elements can have a height in a direction perpendicular to the circumferential direction which is smaller than a distance between two rib elements.
Dabei kann das mindestens eine Rippenelement in Umfangsrichtung eine eckige, vorzugsweise eine dreieckige Querschnittsform aufweisen. Idealerweise weisen die Rippenelemente keine Breite und eine sehr scharfe Kante auf. The at least one rib element can have an angular, preferably triangular, cross-sectional shape in the circumferential direction. Ideally, the rib elements have no width and a very sharp edge.
Das mindestens eine Rippenelement kann alternativ in Umfangsrichtung eine eckenlose Quer schnittsform aufweisen. The at least one rib element can alternatively have a cornerless cross-sectional shape in the circumferential direction.
Weiter ist bei einem elektrischen Fahrzeug umfassend ein Kühlwassersystem und eine Fluidlei tung nach der oben angeführten Beschreibung vorgesehen, dass das Kühlwassersystem die Fluidleitung aufweist. Furthermore, in an electric vehicle comprising a cooling water system and a fluid line according to the description given above, it is provided that the cooling water system has the fluid line.
Vorteile und Wirkungen sowie Weiterbildungen des elektrischen Fahrzeugs ergeben sich aus den Vorteilen und Wirkungen sowie Weiterbildungen der oben beschriebenen Fluidleitung. Es wird daher in dieser Hinsicht auf die vorangegangene Beschreibung verwiesen. Advantages and effects and further developments of the electric vehicle result from the advantages and effects and further developments of the fluid line described above. Reference is therefore made in this regard to the preceding description.
Weiter ist eine Verwendung einer Fluidleitung nach oben angeführten Beschreibung in einem Kühlwassersystem eines elektrischen Fahrzeugs vorgesehen. Vorteile und Wirkungen sowie Weiterbildungen der Verwendung der Fluidleitung ergeben sich aus den Vorteilen und Wirkungen sowie Weiterbildungen der oben beschriebenen Fluidleitung. Es wird daher in dieser Hinsicht auf die vorangegangene Beschreibung verwiesen. Furthermore, a use of a fluid line according to the description given above is provided in a cooling water system of an electric vehicle. Advantages and effects as well as further developments in the use of the fluid line result from the advantages and effects and further developments of the fluid line described above. Reference is therefore made in this regard to the preceding description.
Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus dem Wortlaut der Ansprüche sowie aus der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnungen. Es zeigen: Further features, details and advantages of the invention emerge from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:
Fig. 1 a, b eine schematische Darstellung der Fluidleitung in verschiedenen Ansichten; 1 a, b show a schematic representation of the fluid line in different views;
Fig. 2 a-c eine schematische Darstellung verschiedener Beispiele von Rippenelementen; 2 a-c show a schematic representation of various examples of rib elements;
und and
Fig. 3 eine schematische Darstellung eines elektrischen Fahrzeugs. 3 shows a schematic representation of an electric vehicle.
In Figur 1a ist eine Fluidleitung 10 für ein Kühlwassersystem von elektrischen Fahrzeugen dar gestellt. Die Fluidleitung 10 erstreckt sich entlang einer Längsachse 16. Weiter umfasst die Flu idleitung 10 einen Strömungskanal 14 für Kühlwasser, der sich ebenfalls entlang der Längs achse 16 erstreckt, wie in der Schnittdarstellung in Figur 1 b dargestellt ist. Der Strömungskanal 14 wird von einem Leitungswandelement 11 mit einer Innenwandfläche 18 begrenzt. Das Lei tungswandelement 1 1 erstreckt sich dabei um die Längsachse 16 herum. Weiter erstreckt sich das Leitungswandelement 1 1 entlang der Längsachse 16 der Fluidleitung 10. In Figure 1a, a fluid line 10 for a cooling water system of electric vehicles is shown. The fluid line 10 extends along a longitudinal axis 16. The fluid line 10 further comprises a flow channel 14 for cooling water, which also extends along the longitudinal axis 16, as shown in the sectional view in Figure 1b. The flow channel 14 is delimited by a line wall element 11 with an inner wall surface 18. The Lei processing wall element 1 1 extends around the longitudinal axis 16 around. The line wall element 11 also extends along the longitudinal axis 16 of the fluid line 10.
Die Innenwandfläche 18 grenzt an den Strömungskanal 14 an und begrenzt den Strömungska nal 14 gegen das Leitungswandelement 1 1. Weiter weist die Innenwandfläche 18 mindestens ein Rippenelement 12 auf. Gemäß Figur 1 a weist die Innenwandfläche 18 dabei eine Vielzahl von Rippenelementen 12 auf. Jedes Rippenelement 12 erstreckt sich von der Innenwandfläche 18 in den Strömungskanal 14 und erstreckt sich ebenfalls entlang der Längsachse 16 an der In nenwandfläche 18. Zwischen den Rippenelementen 12 werden damit Kanäle gebildet, die das im Strömungskanal 14 strömende Fluid an der Innenwandfläche 18 führen. The inner wall surface 18 adjoins the flow channel 14 and delimits the flow channel 14 against the line wall element 11. Furthermore, the inner wall surface 18 has at least one rib element 12. According to FIG. 1 a, the inner wall surface 18 has a plurality of rib elements 12. Each rib element 12 extends from the inner wall surface 18 into the flow channel 14 and also extends along the longitudinal axis 16 on the inner wall surface 18. Channels are thus formed between the rib elements 12 that guide the fluid flowing in the flow channel 14 on the inner wall surface 18.
Die Rippenelemente 12 weisen in einer Umfangsrichtung 20 um die Längsachse 16 herum wei ter eine Breite 22 auf und in einer senkrechten Richtung zur Umfangsrichtung bzw. einer radia ler Richtung eine Höhe 32 auf. Die Höhe 32 ist kleiner als ein Abstand 24 zwischen zwei Rip penelementen 12 ausgebildet. Dabei sind die Rippenelemente 12 in Umfangsrichtung 20 um die Längsachse 16 herum alle im Abstand 24 zueinander angeordnet und es ergibt sich eine homogene Verteilung der Rippenelemente 12 in Umfangsrichtung 20. The rib elements 12 have a width 22 in a circumferential direction 20 around the longitudinal axis 16 and a height 32 in a direction perpendicular to the circumferential direction or a radial direction. The height 32 is smaller than a distance 24 between two Rip penelemente 12 formed. The rib elements 12 are 20 μm in the circumferential direction the longitudinal axis 16 is all arranged at a distance 24 from one another and the result is a homogeneous distribution of the rib elements 12 in the circumferential direction 20.
Die Rippenelemente 12 können in einem Querschnitt entlang der Umfangsrichtung 20 um die Längsachse 16 gemäß den Figuren 2a und 2b eine eckige Form aufweisen. Gemäß Figur 2a weist ein Rippenelement 12 eine viereckige Querschnittsform auf. Gemäß Figur 2b weist ein Rippenelement 12 alternativ eine dreieckige Querschnittsform auf. Idealerweise umfasst das Rippenelement 12 eine minimale Breite und eine scharfe Kante an der Spitze der dreieckigen Querschnittsform. Dabei sei nicht ausgeschlossen, dass die Querschnittsform eines Rippenele ment 12 eine Form mit mehr als vier Ecken aufweisen kann. The rib elements 12 can have an angular shape in a cross section along the circumferential direction 20 around the longitudinal axis 16 according to FIGS. 2a and 2b. According to Figure 2a, a rib element 12 has a square cross-sectional shape. According to FIG. 2b, a rib element 12 alternatively has a triangular cross-sectional shape. Ideally, the rib member 12 has a minimum width and a sharp edge at the apex of the triangular cross-sectional shape. It should not be ruled out that the cross-sectional shape of a rib element 12 can have a shape with more than four corners.
Alternativ können die Rippenelemente in einem Querschnitt entlang der Umfangsrichtung 20 um die Längsachse 16 gemäß Figur 2c eine eckenlose Form aufweisen. Die Querschnittsform des Rippenelements 12 kann gemäß Figur 2c dabei als eine Halbwelle ausgebildet sein. Je doch sind auch weitere eckenlose Querschnittsformen möglich. Alternatively, the rib elements can have a cornerless shape in a cross section along the circumferential direction 20 around the longitudinal axis 16 according to FIG. 2c. The cross-sectional shape of the rib element 12 can be designed as a half-wave according to FIG. 2c. However, other cornerless cross-sectional shapes are also possible.
Jegliche Querschnittsform eines Rippenelements 12 lässt sich bereits während der Produktion der Fluidleitung 10 hersteilen. Dabei kann die Fluidleitung 10 zum Beispiel mittels eines Extrusi onsverfahrens hergestellt werden. Dabei wird ein Extrusionswerkzeug für den Strömungskanal 18 verwendet, das eine Geometrie aufweist, die die Rippenelemente 12 an der Innenwandflä che 18 der Fluidleitung 10 ausformt. Damit können die Rippenelemente 12 an der Innenwand fläche 18 während der Extrusion der Fluidleitung 10 ausgeformt werden. Dies beschleunigt und vereinfacht die Herstellung der Fluidleitung 10 mit den Rippenelementen 12 an der Innenwand fläche 18. Any cross-sectional shape of a rib element 12 can already be produced during the production of the fluid line 10. The fluid line 10 can be produced, for example, by means of an extrusion process. In this case, an extrusion tool is used for the flow channel 18 which has a geometry which forms the rib elements 12 on the inner wall surface 18 of the fluid line 10. Thus, the rib elements 12 can be formed on the inner wall surface 18 during the extrusion of the fluid line 10. This accelerates and simplifies the production of the fluid line 10 with the rib elements 12 on the inner wall surface 18.
Die Rippenelemente 12 bewirken, dass Wirbel in einem Fluid, das durch den Strömungskanal 14 strömt, sich quer zur Umfangsrichtung 20 nicht an der Innenwandfläche 18 ausbreiten kön nen. Damit werden Verwirbelungen in dem strömenden Fluid verringert und das Turbulenzni veau sinkt. Dies senkt den Widerstand in dem strömenden Fluid, der durch die innere Reibung in dem strömenden Fluid bewirkt wird. Damit wird ein Druckabfall der Fluidleitung 10 vermindert. The rib elements 12 have the effect that eddies in a fluid which flows through the flow channel 14 cannot propagate on the inner wall surface 18 transversely to the circumferential direction 20. This reduces eddies in the flowing fluid and the Turbulenzni level drops. This lowers the resistance in the flowing fluid caused by the internal friction in the flowing fluid. A pressure drop in the fluid line 10 is thus reduced.
Die Fluidleitung 10 wird in einem Kühlwassersystem 28 eines elektrischen Fahrzeugs 26 ver wendet. Dies ist in Figur 3 dargestellt. Dabei umfasst ein elektrisches Fahrzeug 26 einen zu kühlende Komponente 30, die in Form eines Akkumulators, eines Rechners und/oder eines Elektromotors ausgebildet sein kann. Weiter umfasst das elektrische Fahrzeug 26 ein Kühlwas sersystem 28 mit einer Pumpe, die das Fluid durch die Fluidleitung 10 pumpt. The fluid line 10 is used in a cooling water system 28 of an electric vehicle 26. This is shown in FIG. An electric vehicle 26 includes a component 30 to be cooled, in the form of an accumulator, a computer and / or a Electric motor can be formed. The electric vehicle 26 further comprises a cooling water system 28 with a pump which pumps the fluid through the fluid line 10.
Das Kühlwassersystem 28 weist weiter die Fluidleitung 10 auf, wobei die Fluidleitung 10 das Kühlwassersystem 28 mit der zu kühlenden Komponente 30 verbindet. Damit kann Kühlwasser mittels der Fluidleitung 10 von dem Kühlwassersystem 28 zu der zu kühlenden Komponente30 geleitet werden, um die zu kühlende Komponente 30 zu kühlen. Ebenso kann mittels einer wei teren Fluidleitung 10 das genutzte Kühlwasser von der zu kühlenden Komponente 30 zu dem Kühlwassersystem 28 geleitet werden, um den Kühlwasserkreislauf zu schließen. The cooling water system 28 furthermore has the fluid line 10, the fluid line 10 connecting the cooling water system 28 to the component 30 to be cooled. Cooling water can thus be conducted from the cooling water system 28 to the component 30 to be cooled by means of the fluid line 10 in order to cool the component 30 to be cooled. Likewise, by means of a direct fluid line 10, the cooling water used can be passed from the component 30 to be cooled to the cooling water system 28 in order to close the cooling water circuit.
Mittels des durch die Fluidleitung 10 bereitgestellten verringerten Widerstands zwischen dem Fluid und der Innenwandfläche wird der Energieverbrauch der Pumpe gesenkt, so dass gerade elektrisch betriebene Fahrzeuge weniger Energie verbrauchen, was eine Erhöhung der Reich weite dieser Fahrzeug bewirkt. Die Erfindung ist nicht auf eine der vorbeschriebenen Ausführungsformen beschränkt, sondern in vielfältiger Weise abwandelbar. By means of the reduced resistance between the fluid and the inner wall surface provided by the fluid line 10, the energy consumption of the pump is reduced so that electrically operated vehicles in particular consume less energy, which increases the range of these vehicles. The invention is not restricted to one of the embodiments described above, but can be modified in many ways.
Sämtliche aus den Ansprüchen, der Beschreibung und der Zeichnung hervorgehenden Merk male und Vorteile, einschließlich konstruktiver Einzelheiten, räumlicher Anordnungen und Ver- fahrensschritten, können sowohl für sich als auch in den verschiedensten Kombinationen erfin dungswesentlich sein. All of the features and advantages arising from the claims, the description and the drawing, including structural details, spatial arrangements and process steps, can be essential to the invention both individually and in a wide variety of combinations.
Bezu gszei chen l iste References to symbols
10 Fluidleitung 10 fluid line
11 Leitungswandelement 11 Pipe wall element
12 Rippenelement 12 rib element
14 Strömungskanal 14 flow channel
16 Längsachse 16 longitudinal axis
18 Innenwandfläche 18 interior wall surface
20 Umfangsrichtung 20 circumferential direction
22 Breite 22 width
24 Abstand 24 distance
26 elektrisches Fahrzeug 26 electric vehicle
28 Kühlwassersystem 28 Cooling water system
30 Energiespeicher 30 energy storage
32 Höhe 32 height

Claims

Patentans prüche Patent claims
1. Fluidleitung für ein Kühlwassersystem von elektrischen Fahrzeugen, wobei die Fluidlei tung (10) einen Strömungskanal (14) für Kühlwasser, der sich entlang einer Längsachse (16) der Fluidleitung (10) erstreckt, und ein Leitungswandelement (11) mit einer Innen wandfläche (18) aufweist, wobei die Innenwandfläche (18) an dem Strömungskanal (14) angeordnet ist, dadurch gekennzeichnet, dass die Innenwandfläche (18) mindestens ein Rippenelement (12) aufweist, wobei das Rippenelement (12) sich von der Innenwandflä che (18) in den Strömungskanal (14) erstreckt. 1. Fluid line for a cooling water system of electric vehicles, wherein the Fluidlei device (10) has a flow channel (14) for cooling water, which extends along a longitudinal axis (16) of the fluid line (10), and a line wall element (11) with an inner wall surface (18), wherein the inner wall surface (18) is arranged on the flow channel (14), characterized in that the inner wall surface (18) has at least one rib element (12), the rib element (12) extending from the inner wall surface (18) ) extends into the flow channel (14).
2. Fluidleitung nach Anspruch 1 , dadurch gekennzeichnet, dass sich das mindestens eine Rippenelement (12) entlang der Längsachse (16) an der Innenwandfläche (18) erstreckt. 2. Fluid line according to claim 1, characterized in that the at least one rib element (12) extends along the longitudinal axis (16) on the inner wall surface (18).
3. Fluidleitung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Innenwandflä che (18) eine Vielzahl von Rippenelementen (12) aufweist. 3. Fluid line according to claim 1 or 2, characterized in that the Innenwandflä surface (18) has a plurality of rib elements (12).
4. Fluidleitung nach Anspruch 3, dadurch gekennzeichnet, dass die Rippenelemente (12) in einer Umfangsrichtung (20) um die Längsachse (16) herum in einem gleichen Abstand (24) zu einander angeordnet sind. 4. Fluid line according to claim 3, characterized in that the rib elements (12) are arranged in a circumferential direction (20) around the longitudinal axis (16) at an equal distance (24) from one another.
5. Fluidleitung nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die Rippenelemente (12) in Umfangsrichtung (20) eine Höhe (32) aufweisen, die kleiner als ein Abstand (24) zwischen zwei Rippenelementen (12) ist. 5. Fluid line according to claim 3 or 4, characterized in that the rib elements (12) in the circumferential direction (20) have a height (32) which is smaller than a distance (24) between two rib elements (12).
6. Fluidleitung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das min destens eine Rippenelement (12) in Umfangsrichtung (20) eine eckige, vorzugsweise dreieckige, Querschnittsform aufweist. 6. Fluid line according to one of claims 1 to 5, characterized in that the min least one rib element (12) in the circumferential direction (20) has an angular, preferably triangular, cross-sectional shape.
7. Elektrisches Fahrzeug umfassend ein Kühlwassersystem (28) und eine Fluidleitung (10) nach einem der vorhergehenden Ansprüche, wobei das Kühlwassersystem (28) die Flu idleitung (10) aufweist. 7. An electric vehicle comprising a cooling water system (28) and a fluid line (10) according to any one of the preceding claims, wherein the cooling water system (28) has the fluid line (10).
8. Verwendung einer Fluidleitung (10) nach einem der vorhergehenden Ansprüche in einem Kühlwassersystem (28) eines elektrischen Fahrzeugs (26). 8. Use of a fluid line (10) according to one of the preceding claims in a cooling water system (28) of an electric vehicle (26).
PCT/EP2020/061178 2019-05-10 2020-04-22 Fluid pipe for a cooling water system of electric vehicles, electric vehicle and use of a fluid pipe WO2020229112A1 (en)

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DE102019112213.9 2019-05-10

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