• 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:
    12 ÅÅMMâNQEÅWSå. A magnetic bearing corrugation (100) comprising a permanent migraine (110), which is levitated on a riotic body without a single-flow migration, and a simple identification of permanent migration (110) are described. The magnetic bearing structure (100) comprises a longitudinal permanent bearing (110) arranged on one side of a linear bearing shaft (29), which circular ring bearing (110) is inclined in a direction parallel to an outer shaft (said axis). 120) mounted on one side of said permanent magnet (110), and a conductor (136) mounted on an external fire of said coil (126), which conductor (130) is used to form a megnelfaltebeiwe. According to the configuration, when an additional bias voltage is not applied to the coil (120) which is moliterated in the magnetic bearing (100), a relational spasm is delivered according to the magnetic field (110), and a magnetic directional permanent magnet (110) is parallel to an axial direction. hosrotation axis (20), thus enabling simple magnetization of and improving the performance of the magnetic bearing (100).
    公开号:SE536808C2
    申请号:SE1251050
    申请日:2011-03-10
    公开日:2014-09-09
    发明作者:Cheol Hoon Park；Sang-Kyu Choi；Sang Yong Ham；Dong-Won Yun
    申请人:Korea Mach & Materials Inst；
    IPC主号:
    专利说明:

    536 808 biasing force is applied to the rotating body in accordance with a load caused by the rotating body. A permanent magnet as well as an electromagnet are used to form the magnetic biasing force. To divide the paths of the magnetic fields of the electromagnet and the permanent magnet, a magnetic bearing structure has been proposed to use a method of providing a donut shaped permanent magnet between a pair of electromagnets.
    In the case of a magnetic bearing of the above construction, the direction of magnetization of the donut-shaped permanent magnet must be perpendicular to the axis direction of the rotating body, that is, the permanent magnet must be magnetized in a radial direction thereof. However, the magnetization process is difficult and the production efficiency of the magnetic bearings may deteriorate. Therefore, a magnetic bearing structure needs to be provided to easily magnetize the permanent magnet while the magnetic field paths of the permanent magnet and the electromagnet are divided.
    The above information described in the background piece is only for the purpose of improving the understanding of the background of the invention and may therefore contain information which does not belong to what is generally known in this country for the person skilled in the art.
    Summary of the Invention The present invention has been made in the aim of providing a magnetic bearing structure for dividing the paths of the magnetic fields of an electromagnet and a permanent magnet for preventing interference with its paths and for providing a simple magnetization of the permanent magnet, and a turbomachine comprising the same .
    An exemplary embodiment of the present invention provides a magnetic bearing structure comprising: an annular permanent magnet arranged on one side of a rotation shaft, said annular permanent magnet being magnetized in a direction parallel to an axis direction of said rotation axis; a conductor mounted on an outer side 106 of the permanent magnet, which conductor is used to form a magnetic field path; and a coil mounted inside the conductor.
    The magnetic bearing structure further comprises a support which is in contact with said permanent magnet and is connected thereto, said magnetic field path caused by said permanent magnet being formed by said axis of rotation of said support.
    The axis of rotation further comprises a rotation plate, said magnetic field path being formed by said rotation plate.
    A non-magnetic material is filled in an empty space formed inside said conductor.
    A gap is formed between said rotation plate and said conductor.
    Another embodiment of the present invention provides a turbo engine comprising: a housing; a rotation shaft mounted inside said housing; a power transmitter coupled to said axis of rotation, which power transmitter transmits power; and a magnetic bearing mounted on said axis of rotation, said magnetic bearing comprising: an annular permanent magnet arranged on one side of said axis of rotation, said annular permanent magnet enclosing said axis of rotation; a conductor mounted on an outer side of said permanent magnet, which conductor is used to form a magnetic field path; and a coil mounted inside said conductor, said permanent magnet being magnetized in a direction parallel to an axis direction of said axis of rotation.
    The turbomachine further comprises a rotary plate coupled to said rotary shaft, a magnetic field path of said permanent magnet being formed by said rotary plate.
    A gap is formed between said rotation plate and said conductor.
    The turbomachine further comprises a support which is in contact with said permanent magnet and is connected thereto, a magnetic field path caused by said permanent magnet being formed by said axis of rotation of said support. The turbomachine further comprises a rotation plate coupled to said axis of rotation, a magnetic field path of said permanent magnet being formed by said rotation plate.
    A gap is formed between said rotation plate and said conductor.
    A non-magnetic material is filled in an empty space formed inside said conductor.
    According to the embodiments of the present invention, the magnetic field paths of the electromagnet and the permanent magnet are divided, an additional bias current is not applied to the electromagnet by the pre-magnetization field caused by the permanent magnet, and the magnetization direction of the permanent magnet corresponds to the axis direction of the rotating body. stored.
    Brief Description of the Drawings Fig. 1 is a cross-sectional view of a turbomachine having a magnetic bearing structure according to an exemplary embodiment of the present invention.
    Fig. 2 is a cross-sectional view of a magnetic screen bearing shown in Fig. 1.
    Fig. 3 and Fig. 4 are cross-sectional views of a magnetic bearing according to another exemplary embodiment of the present invention.
    Fig. 5 and Fig. 6 are cross-sectional views of a drive device of a magnetic law. Detailed Description Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
    Fig. 1 shows a cross-sectional view of a turbomachine 1 with a magnetic bearing construction according to an exemplary embodiment of the present invention. 536 808 The turbocharger 1 according to an exemplary embodiment of the present invention comprises a housing 10, a rotary shaft 20, a power transmitter 30, and a magnetic bearing 100. The turbocharger 1 comprises a universal turbocharger used in a general machine tool, and comprises especially a small turbo engine.
    The housing 10 provides a space for receiving the axis of rotation 20, and the axis of rotation 20 covers a case in which the axis of rotation is driven while set to be perpendicular and a case in which the axis of rotation is driven while being set to be horizontal. The power transmitter 30 comprises a commonly used motor and the power transmitter 30 may be arranged inside or outside the housing 10.
    The magnetic bearing 100 is arranged on one side of the axis of rotation 20 while supporting the axis of rotation on the side.
    The magnetic bearing 100 includes a permanent magnet 110, a coil 120, and a conductor 130. A further detailed description now follows with reference to Fig. 2 to Fig. 4. Fig. 2 shows a cross-sectional view of a magnetic sight bearing 100 further comprising a support 140; Fig. 3 shows a cross-sectional view of a modified exemplary variation in which a position of a coil 120 is changed in an exemplary embodiment shown in Fig. 2, and Fig. 4 shows a cross-sectional view of a magnetic screen bearing 100 without the support 140.
    The permanent magnet 110 is of the ring type, and it is arranged on one side of the axis of rotation 20. A magnetic circuit for biasing the axis of rotation 20 is formed by the permanent magnet 110 while an additional current affecting the bias of the axis of rotation 20 is not supplied so that the axis of rotation 20 flows. Fig. 2 and Fig. 3 show a magnetic field generated by the permanent magnet 110. It is exemplified in this case that a rotation plate 21 is further arranged at the rotation shaft 20 and that the rotation plate 21 levitates, or that the rotation shaft 20 and the rotation plate are formed in one piece and that they levitate . The rotation shaft 20 or the rotation plate 21 is also made of a conductor.
    In this case, the magnetization direction of the permanent magnet 110 is set to be parallel to the axis direction of the axis of rotation 20. That is, the N-polarity or S-polarity does not continue to the axis of rotation due to the magnetization of the permanent magnet 110, so compared to the 536 808 the magnetic bearing having another permanent magnet which is magnetized perpendicular to the direction of the axis of rotation does not become a formation of the magnetic field which affects the bias of the axis of rotation 20 generated by the permanent magnet 110 symmetrically. However, the fact that the permeability of the conductor 130 is good and that the generation of the pre-magnetization field does not become symmetrical generally does not significantly affect the levitation of the axis of rotation 20 or the rotation plate 21 caused by the pre-magnetization field of the permanent magnet 110.
    Therefore, a bias flux formed by the permanent magnet 110 passes through the rotation shaft 20 or the rotation plate 21 and the conductor 130, it returns to the permanent magnet 100, and the rotation shaft 20 or the rotation plate 21 levitates.
    The coil 120 is arranged on one side of the permanent magnet 110.
    The coil 120 is exemplified to be arranged outside the permanent magnet 110 and to have an annular shape for enclosing the axis of rotation 20, but the shape is not limited thereto. That is, it may be formed as a pair facing each other with respect to the axis of rotation 20. The current flows to the coil 120 to generate a magnetic field to control the levitation position of the axis of rotation 20 or the rotation plate 21. That is, when the position of the axis of rotation 20 or the rotation disk 21 changes in the axis direction, a direction or magnitude of the current changes to control the position change in the axis direction of the rotation axis 20 or the rotation plate 21. A detailed drive device will be described later.
    A conductor 130 which influences the formation of a magnetic field path is arranged outside the coil 120 and the permanent magnet 110. The conductor 130 influences the formation of magnetic field paths, to bias the axis of rotation 20 or the rotation plate 21, which is generated by the permanent magnet 110 and the magnetic field to control the change of rotation axis 20. 21, which is generated by the coil 120. A gap is formed between the conductor 130 and the rotation plate 21. That is, in general, a sensor 40 for sensing the gap is provided inside or outside the magnetic bearing 100, when the gap changes depending on the sensor 40, changes the magnitude or direction of the current supplied to the coil 120 to maintain the gap within a predetermined range and to control the change of position of the axis of rotation 20 or the plate of rotation 21.
    The magnetic bearing 100 further includes a support 140. The support 140 is exemplified so that it is in contact with the permanent magnet 110 and is connected to it. The support 140 is desirably formed by a conductor. The support 140 is in contact with the permanent magnet 110 and is connected to it, and the magnetization direction of the permanent magnet 110 is parallel to the axis direction of the rotation shaft 20, so that the N-polarity or S-polarity caused by the magnetization is in contact with the support 140. In this case, the magnetic field path generated by the permanent magnet 110 formed by the rotation shaft 20 or the rotation plate 21 through the support 140. In this case, a shape of the magnetic field which affects the bias of the rotation shaft 20 and formed by the permanent magnet 110 does not become symmetrical. However, in a manner similar to that described above, the fact that the formation of the pre-magnetization field does not become symmetrical generally does not significantly affect the levitation of the axis of rotation 20 or the rotation plate 21 caused by the pre-magnetization field of the permanent magnet 110.
    When the support 140 is provided, a gap is also formed between the conductor 130 and the rotating plate 21. That is, in general, the sensor 40 for sensing the gap acts on the magnetic bearing 100, and when the gap changes depending on the sensor 40, the magnitude or direction of the current changes. which is fed to the spool 120 to maintain the gap within a predetermined range and to control the change of position of the rotation shaft 20 or the rotation plate 21.
    As shown in Fig. 3, the permanent magnet 110 is arranged in the space inside the conductor 130, the support 140 is arranged thereon, and the coil 120 is arranged thereon. The function of the coil 120 in this case corresponds to the above description.
    Furthermore, by using the above constituent elements, an empty space is formed which is enclosed by the coil 120, the conductor 130, and the support (140, the support 140 being replaceable with a rotating plate 21), and it is desirable to fill the empty space with a non-rotating element. magnetic material such as Cu or Al. Similar to conductor 130, the filled non-magnetic material is used to form the magnetic field path and to support the coil 120. A drive device of a turbomachine 1 using a magnetic bearing structure 100 according to the present invention will now be used. described with reference to Fig. 2, Fig. 5 and Fig. 6. The drive unit comprising the support 140 will be described by way of example, and the drive case with the support 140 operates according to the same principle.
    The magnetic bearing 100 is used for the rotation shaft 20, and in this case it is desirable that the rotation shaft 20 for example comprises the rotation plate 21 and for the magnetic bearing 100 to be used for the rotation plate 21. In this case, the rotation plate 21 is formed by a conductor.
    When the magnetic bearing 100 is used for the rotation plate 21, as shown in Fig. 2, the rotation plate 21 levitates by means of the magnetic field generated by the permanent magnet 110. In this case, the magnetization direction of the permanent magnet 110 is parallel to the axis direction of the rotation shaft 20. symmetrically. The formation does not significantly affect the levitation of the rotating plate 21.
    When the rotation shaft 20 rotates in operation of the turbomachine 1, the rotation plate 21 rotates, and in this case the rotation plate 21 rotates while the position changes in the shaft direction. Therefore, the position change of the rotary plate 21 needs to be controlled within a predetermined range. In general, the position change of the rotation plate 21 can be controlled by detecting a movement of the rotation plate 21 by means of the sensor 40 attached to the inside or outside of the magnetic bearing 100.
    As the rotating plate 21 moves downward in the drawing as shown in Fig. 5, the magnetic field formed by the permanent magnet 110 is increased or decreased by the magnetic field formed by the coil 120, the magnitude or direction of the current flowing in the coil 120 being controlled so that the direction of the magnetic field going down may be larger than the magnetic field going up, and the rotation plate 21 is moved up.
    As the rotating plate 21 moves upward in the drawing, as shown in Fig. 6, the magnetic field formed by the permanent magnet 110 is increased or decreased by the magnetic field formed by the coil 120, the magnitude or direction of the current flowing in the coil 120 being controlled so that the direction of The upward magnetic field 536 808 may be larger than the downward magnetic field, and the rotation plate 21 is moved downward.
    By controlling the position of the rotation plate 21 as described, the space between the rotation plate 21 and the conductor 130 is maintained within a predetermined range.
    However, since this invention has been described in connection with what are presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the described embodiments, but is intended to cover various modifications and corresponding devices included in the inventive concept, and the scope of the appended claims.
    Therefore, the scope of the present invention should not be construed as being limited to the exemplary embodiments described herein, and should be defined by the appended claims and equivalents thereof.
    权利要求:
    Claims (6)
    [1]
    A magnetic bearing structure (100) comprising: an annular permanent magnet (110) disposed on one side of a rotary shaft (20) comprising a rotating plate (21), said annular permanent magnet (110) being magnetized in a direction parallel to an axis direction of said axis of rotation (20); a conductor (130) mounted on an outer side of said permanent magnet (110), which conductor (130) is used to form a magnetic field path; a coil (120) mounted inside the conductor (130); characterized by a support (140) which is in contact with the N-polarity or an S-polarity of said permanent magnet (110) and is connected thereto, and said magnetic field path caused by said permanent magnet (110) is formed by said rotating plate (21) of said support (140).
    [2]
    The magnetic bearing structure (100) of claim 1, wherein a non-magnetic material is filled in an empty space formed within said conductor (130).
    [3]
    A magnetic bearing structure (100) according to claim 1 or 2, wherein a gap is formed between said rotation plate (21) and said conductor (130).
    [4]
    A turbomachine (1) comprising: a housing (10); a rotation shaft (20) comprising a rotation plate (21) mounted inside said housing (10); a power transmitter (30) coupled to said axis of rotation (20), which power transmitter (30) transmits power; and a magnetic bearing (100) mounted on said axis of rotation (20), said magnetic bearing (100) comprising: an annular permanent magnet (110) disposed on one side of said axis of rotation (20) and magnetized in a direction parallel to a axis direction of said axis of rotation (20); 536 808 a conductor (130) mounted on an outer side of said permanent magnet (110), which conductor (130) is used to form a magnetic field path; a coil (120) mounted inside said conductor (130); characterized by a support (140) which is in contact with the N-polarity or an S-polarity of said permanent magnet (110) and is connected thereto, and said magnetic field path caused by said permanent magnet (110) is formed by said rotating plate (21) of said support (140).
    [5]
    A turbomachine (1) according to claim 4, wherein a gap is formed between said rotary plate (21) and said conductor (130).
    [6]
    A turbomachine (1) according to claim 4 or 5, wherein a non-magnetic material is filled in an empty space formed inside said conductor (130). 11
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    KR20100021869A|KR101166854B1|2010-03-11|2010-03-11|Magnetic bearing structure and turbo machine having the same|
    PCT/KR2011/001676|WO2011112019A2|2010-03-11|2011-03-10|Magnetic bearing and turbo equipment|
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