• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    electric machine. the present invention relates to an electric machine that has a base body (1), a rotation axis (6) and a heat exchanger (10). the base body (1) comprises at least one stator (2). the cooling ducts (4) for a liquid cooling medium are arranged in the base body (1). the axis of rotation (6) is mounted on the base body (1) in such a way that the axis of rotation (6) can rotate about a rotary axis (5). the axis of rotation (6) is realized as a hollow axis through which the liquid cooling medium can flow. the heat exchanger (10) serves to vent the heat contained in the liquid cooling medium to the vicinity of the electric machine. the heat exchanger (10), the axis of rotation (6) and the cooling ducts (4) are fluidly connected to each other in pairs so that a closed circuit for the liquid medium is produced. a supply element (11) is arranged in a pattern rotatably fixed on the axis of rotation (6), said supply element being connected in the closed circuit to the liquid cooling medium and being used for circular mind force the liquid cooling medium as the axis of rotation (6) rotates around the axis of rotation (5) in the closed circuit for the liquid cooling medium
    公开号:BR112013018324B1
    申请号:R112013018324-1
    申请日:2011-12-13
    公开日:2020-10-06
    发明作者:Konrad Brandl；Vladimir Danov；Klaus Dennerlein；Bernd Gromoll；Jürgen Hofmann；Patryk Piotrowski；Andreas Schröter
    申请人:Siemens Aktiengesellschaft；
    IPC主号:
    专利说明:

    [001] The present invention relates to an electrical machine, - in which the electrical machine has a base body and a rotor shaft, - in which the base body comprises at least one stator, - in which the cooling elements for a liquid cooling medium are arranged on the base body, - where the rotor shaft is mounted on the base body in such a way that the rotor shaft can rotate about a rotating axis, - where the machine electric has a heat exchanger in addition to the base body and the rotor shaft, - in which the rotor shaft is realized as a hollow shaft comprising an inner tube through which the liquid cooling medium can flow, - in which the tube internal is opened at its front end and / or comprises radial probe holes or other radial recesses, - in which the heat exchanger serves to vent the heat contained in the liquid cooling medium to the vicinity of the electric machine, - in which the heat exchanger is fluidly connected to the rotor shaft in a la and to the cooling ducts on the other side, the rotor shaft is fluidly connected to the heat exchanger on the one side and to the cooling ducts on the other side and the cooling ducts are fluidly connected to the heat exchanger on the one side and to the rotor shaft on the other side so that a closed loop for the liquid medium is produced.
    [002] Such an electric machine is known, for example, from US 6,191,511 B1.
    [003] DE 10 2009 029 716 A1 describes an electric machine, in which a hydraulic oil is fed as a coolant to the rotor shaft at one axial end, the hydraulic oil is directed to the opposite side of the rotor and is then fed back to the axial end mentioned at the beginning cooling the stator and finally discharged from the electric machine. A supply element can be realized, for example, as a centrifugal pump arranged on the rotor shaft.
    [004] GB 2 357 377 A describes a combined pump-generator arrangement, in which a first part of the pumped medium branches off the main flow, is directed through the generator stator and fed back to the main flow. A second part of the pumped medium is branched from the main flow, directed initially through the stator and then through the generator's rotor shaft and then back again to the main flow.
    [005] With liquid cooling media, in particular water, substantially more efficient cooling of electrical machines is possible except with gaseous cooling media, in particular air. In many cases, therefore, electric machines are equipped with water cooling.
    [006] The purpose of the present invention is to design an electric machine of the type referred to in the introduction in such a way that an efficient cooling of the electric machine is carried out in a simple way.
    [007] The objective is achieved by an electric machine with the characteristics of the invention. Advantageous modalities of the electric machine are the subject matter of the embodiments.
    [008] According to the invention, a provision is made for an electrical machine of the type referred to in the introduction to be designed in such a way, - that the power element is arranged in a pattern rotatably fixed on the rotor shaft, said power element. power being connected in the closed circuit to the liquid cooling medium and being used to forcibly circulate the liquid cooling medium as the rotor axis rotates around the axis of rotation in the closed circuit to the liquid cooling medium, and- the medium liquid cooling fluid flows, due to forced circulation by the feed element, from the heat exchanger to the rotor shaft, flows axially into the inner tube, exits the inner tube at the end of the inner tube and into the intermediate space between the rotor shaft and the inner tube flows back in the opposite direction, flows from there to the cooling ducts and from there back to the heat exchanger.
    [009] Preferably, the supply element is connected between the rotor shaft and the cooling ducts in the closed circuit for the liquid cooling medium. Due to this measure, particularly simple structural modalities are possible in the realization of the supply element. In particular, a provision can be made for making the feed element, - that the feed element is designed as a blade wheel encircling the rotor shaft radially on the outside, feeding the liquid cooling medium radially outward, - that the supply element is surrounded by a supply housing arranged in a rotating pattern fixed on the base body, - that the rotor shaft has at least one radial opening in an area surrounded by the supply element, and- that the connection from the rotor shaft to the cooling ducts is formed as at least one connecting line going radially towards the feed housing.
    [0010] It is possible for the connection from the heat exchanger for the rotor shaft to be incorporated in such a way that the liquid cooling medium is axially supplied to the rotor shaft. This involvement is fluidly optimal.
    [0011] As an alternative, it is possible for the connection from the heat exchanger to the rotor shaft to be incorporated in such a way that the liquid cooling medium is supplied radially to the rotor shaft. This arrangement may be necessary in practice if the rotating part of a transmitting unit for a position, speed of revolution or acceleration-dependent signal is arranged on the rotor shaft.
    [0012] Additional advantages and details can be derived from the following description or exemplary modalities in conjunction with the drawings. These show, as main representations:
    [0013] Figure 1 an electric machine,
    [0014] Figure 2 is a schematic shape, a part of the electric machine in Figure 1, and
    [0015] Figure 3 is an alternative arrangement of the part of the electric machine in figure 1 shown in figure 2.
    [0016] According to figure 1, an electrical machine has a base body 1. The base body 1 comprises at least one stator 2. If appropriate, the base body 1 may comprise, in addition to stator 2, additional elements , such as a housing 3. As an alternative, the electrical machine can be arranged as an electrical machine without a housing. The cooling ducts 4 for a liquid cooling medium are arranged in the base body 1, whether in the stator 2 or in the housing 3 of the electric machine. The flow of the cooling medium in the cooling ducts 4 is indicated in figure 1 by corresponding arrows, which are drawn in figure 1 by the reference character A. the liquid cooling medium is, as a rule, water.
    [0017] Cooling ducts 4 can be arranged as required. For example, they can be formed as cooling ducts running axially. The term “axially” in this context, and also elsewhere, is in relation to the rotation axis 5 of the electric machine. It means a direction parallel to the axis of rotation 5.
    [0018] In the case of an axial stroke, the cooling ducts 4 can be cooling ducts 4, the inlet supply of the liquid cooling medium occurs at one axial end, and the supply outlet of the cooling medium occurs at the other end axial. As a rule, however, the supply inlet and the supply outlet of the liquid cooling medium occurs at the same axial end of the electrical machine.
    [0019] As an alternative to an axial stroke of the cooling ducts 4, the cooling ducts can run tangentially. The term “tangentially” is the same, in relation to the axis of rotation 5. It means a direction at a constant distance from the axis of rotation 5, around the axis of rotation 5.
    [0020] The precise mode of the cooling ducts 4 is not such as a subject matter of the present invention. Preferably, the cooling ducts 4 and their possible designs and arrangements are generally known in the prior art.
    [0021] The electrical machine still has a rotor shaft 6. The rotor shaft 6 is mounted on bearings 7 of the electrical machine. The rotor axis 6 can thus rotate about the axis of rotation 5.
    [0022] The rotor shaft 6 is formed according to figure 1 as a hollow shaft. The liquid cooling medium can likewise flow through it. This is indicated in figure 1 by arrows, which are provided with the reference character B.
    [0023] The rotor shaft 6 mode as a hollow shaft can be carried out as required. In principle, it is possible for the liquid cooling medium to be fed at one axial end of the rotor shaft 6 at the rotor shaft 6, and fed out at the other axial end. As a rule, however, such an arrangement is burdened by substantial disadvantages in other respects. As a general rule, therefore, the rotor shaft 6 has an inner tube 8, so that, as shown in figure 1, the liquid cooling medium initially flows axially in the inner tube 8, then emerges from the inner tube 8 at the end of the inner tube 8 and therefore flows back in the opposite direction, in the intermediate space between rotor shaft 6 and inner tube 8.
    [0024] The transition from the cooling medium of the inner tube 8 to the rotor shaft 6 can be arranged as required. For example, the inner tube 8, as shown in figure 1, can be opened at its end on the front side. As an alternative or in addition, the inner tube 8 can exhibit radial probe holes or other radial openings. The term "radial" in this context, as with the terms "axial" and "tangential", is related to the axis of rotation 5. The term "radial" designates a direction orthogonal to the axis of rotation 5, and specifically to the axis of rotation 5 to or from him.
    [0025] The axes of rotation 6 designated as hollow axes with an inner tube 8 located inside are known as such. Detailed explanations regarding the mode of the rotor shaft 6 are therefore not necessary.
    [0026] Due to the liquid cooling medium flowing through the rotor shaft 6, the rotor shaft 6 is cooled. Due to the cooling of the rotor shaft 6, a rotor 9 of the electric machine, arranged in a rotating pattern fixed on the rotor shaft 6, is indirectly cooled.
    [0027] The electric machine additionally displays a heat exchanger 10. The heat exchanger 10 serves to vent the heat contained in the liquid cooling medium to the surroundings, most of the time to ambient air.
    [0028] The heat exchanger 10 can be realized as required. The heat exchanger 10 is often designed as a finned radiator. Finned radiators are generally known as such with water-cooled car engines. The finned radiator can be arranged as required, alternatively horizontally or vertically. A fan can also be assigned to it, in order to optimize the cooling effect of the heat exchanger 10.
    [0029] If the electric machine has a fan, which is arranged in a pattern rotatingly fixed on the rotor shaft 6, it is also possible for the heat exchanger 10 to be located directly outside the base body 1 or integrated in a otherwise in the base body 1.
    [0030] The heat exchanger 10, rotor shaft 6, and the cooling ducts 4 are fluidly connected to each other in pairs. The heat exchanger 10 is therefore connected to the rotor shaft 6 on one side and to the cooling ducts 4 on the other side. Likewise, the rotor shaft 6 is connected to the heat exchanger 10 on the one hand and the cooling ducts 4 on the other side. Likewise, in a similar manner, the cooling ducts 4 are connected to the heat exchanger 10 on one side and to the rotor shaft 6 on the other side.
    [0031] In order to achieve a forced circulation of the liquid cooling medium, a supply element 11 is provided, which is connected in the closed cooling circuit to the liquid cooling medium. The feeding element 11 is arranged in a pattern rotatably fixed on the rotor shaft 6, according to figures 1 to 3, so that when the rotor shaft 6 rotates, it rotates in the same way. By means of the supply element 11, when the rotor shaft 6 rotates, the liquid cooling medium is forcibly circulated around the axis of rotation 5 in the closed circuit for the liquid cooling medium. The feed direction of the liquid cooling medium is preferably just as the liquid cooling medium, due to forced circulation, flows through the feed element 11 of the heat exchanger 10 to the rotor shaft 6, from the rotor shaft 6 to the cooling ducts 4, and from cooling ducts 4 back to the heat exchanger 10. Naturally, the liquid cooling medium, once it has flowed from the heat exchanger 10 to the rotor shaft 6, flows through the rotor shaft 6, before it flows into the cooling ducts 4. Likewise, the liquid cooling medium naturally flows through the cooling ducts 4 before it flows back to the heat exchanger 10.
    [0032] In principle, the supply element 11 can be connected at any desired point in the closed circuit to the liquid cooling medium. Preferably, the supply element 11, which corresponds to the representation in figures 1 to 3, is connected between the rotor shaft 6 and the cooling ducts 4 in the closed circuit for the liquid cooling medium. In this case, according to figures 1 to 3, in the mechanical-structural respect, the feeding element 11 can, in particular, be formed as a blade wheel, surrounding the rotor shaft 6 radially on the outside and feeding the liquid cooling means from radially inward to radially outward. The feeding element 11 in this embodiment is surrounded by a feeding housing 12, which is arranged in a pattern rotatably fixed to the base body 1. The rotor shaft 6, in this case, displays in an area that is surrounded by the feeding housing 12, at least one radial opening 13. In addition, in this case, there is a connection of the rotor shaft 6 to the cooling ducts 4, through which the liquid cooling medium flows from the axis of rotation 5 to the cooling ducts 4 , which is formed as a connecting line 14, which moves radially out of the feed housing 12.
    [0033] The connection of the heat exchanger 10 to the rotor shaft 6, or more precisely, as a rule for the inner tube 8, can be designed as required. The arrangement is fluidly optimal when the liquid cooling medium is conducted axially to the rotor shaft 6 corresponding to the representation in figure 2. In many cases, however, corresponding to the representation in figure 3, a transmitting unit 15 is provided, which serves to generate a position, speed of revolution or acceleration-dependent signal. For example, transmitting unit 15 can be designed as a solver or as an incremental transmitter or similar transmitting unit. In this case, an axial supply of the liquid cooling medium to the rotor shaft 6 is not possible. In this case, the supply of the liquid cooling medium to the rotor shaft 6, corresponding to the representation in figure 3, is not axial but rather radial.
    [0034] The present invention has many advantages. In particular, good thermal cooling of the electrical machine is achieved in a simple manner, without the need for an external cooling medium connection. The structural arrangement is also simple, reliable and almost maintenance-free.
    [0035] The description already mentioned serves exclusively to explain the present invention. The protection scope of the present invention must, on the contrary, be determined exclusively by the attached embodiments.
    权利要求:
    Claims (4)
    [0001]
    1. Electric machine, comprising a base body (1) comprising at least one stator (2) and cooling ducts (4) for a liquid cooling medium, a rotor shaft (6) mounted on the base body (1) for rotation about an axis of rotation (5), the rotor axis (6) is formed as a hollow shaft having a first axial end and a second axial end and comprising an inner tube (8) co-rotating with the hollow shaft and configured to flow the liquid cooling medium through it from the first axial end to the second axial end and, after that, it returns to the first axial end in an opposite direction in an intermediate space disposed between the rotor shaft (6) and the inner tube (8), the rotor shaft (6) having at least one radial opening (13) located at the first end, a feed element (11) co-rotating with the rotor shaft (6) and constructed as a blade wheel radially surrounding an external side of the rotor shaft (6 ) at the first axial end and transporting the liquid cooling medium radially outward from the intermediate space to the cooling ducts (4) so as to forcibly circulate the liquid cooling medium in the closed circuit as the rotor axis (6) rotates , a feed housing (12) arranged in a rotationally fixed manner on the base body (1) and having an internal space that is sealed against the rotor shaft (6) at the first axial end, with the feed housing (12) surrounding the supply element (11) and having an outlet connected to the cooling ducts (4) by means of at least one connection line (14) extending radially outwardly from the supply housing (12), the at least one radial opening (13) provides the liquid cooling medium inside the supply housing (12), characterized by the fact that it also comprises a heat exchanger (10) configured to transfer contained heat o in the liquid cooling medium to the vicinity of the electric machine, the heat exchanger (10), the rotor shaft (6) and the cooling ducts (4) being fluidly connected to each other in series, thus producing a circuit closed to the liquid cooling medium.
    [0002]
    2. Electric machine according to claim 1, characterized by the fact that due to forced circulation by the supply element (11), the liquid cooling medium flows from the heat exchanger (10) to the rotor shaft (6 ), from the rotor shaft (6) to the cooling ducts (4) and from the cooling ducts (4) back to the heat exchanger (10).
    [0003]
    Electric machine according to claim 1, characterized in that the heat exchanger (10) is fluidly connected to the rotor shaft (6) in such a way that the liquid cooling medium is fed axially to the rotor shaft ( 6).
    [0004]
    4. Electric machine according to claim 1, characterized by the fact that the heat exchanger (10) is fluidly connected to the rotor shaft (6) in such a way that the liquid cooling medium is fed radially to the rotor shaft ( 6).
    类似技术:
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    同族专利:
    公开号 | 公开日
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    RU2013134240A|2015-01-27|
    CN103283129A|2013-09-04|
    DE102010064010A1|2012-06-28|
    BR112013018324A2|2018-09-18|
    US20130270939A1|2013-10-17|
    CN103283129B|2016-02-17|
    RU2577773C2|2016-03-20|
    EP2633606A2|2013-09-04|
    US9431878B2|2016-08-30|
    WO2012084585A3|2013-01-31|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-07-16| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|
    2020-05-12| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-07-28| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-10-06| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 13/12/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010064010.7|2010-12-23|
    DE102010064010A|DE102010064010A1|2010-12-23|2010-12-23|Electric machine with closed, self-sufficient cooling medium circuit|
    PCT/EP2011/072518|WO2012084585A2|2010-12-23|2011-12-13|Electric machine with enclosed, autonomous cooling medium circuit|
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