JP2013053733A - Magnetic gear device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic gear device capable of supporting a structure well in balance.SOLUTION: The device includes: an input side magnetic gear 2 provided by directing a magnetic force generation surface, which is arranged around an axis line of an input rotation shaft 1, toward the outside in a radial direction; an output side magnetic gear 3 provided by directing a magnetic force generation surface, which is arranged by coaxially surrounding the input side magnetic gear 2, toward the inner side in the radial direction so as to oppose the magnetic force generation surface of the input side magnetic gear 2; a plurality of magnetic path members 4 made of electromagnetic steel, which are circumferentially arranged and fixed between the opposing magnetic force generation surfaces of the input side magnetic gear 2 and the output side magnetic gear 3; and an output rotation shaft 5 connected with the input rotation shaft 1 of the output side magnetic gear 3 and to the end of the opposite side in the axial direction. Further, the device includes first and second support mechanisms 6, 7 for possibly supporting the relative movement in the circumferential direction, while suppressing the relative movement in the radial direction, between the input side magnetic gear 2 and the output side magnetic gear 3, and between the output side magnetic gear and the magnetic path member 4, respectively, at the side end of the output rotation shaft 5 of the input side magnetic gear 2, the output side magnetic gear 3 and the magnetic path member 4.

Description

  The present invention relates to a magnetic gear device that transmits torque by magnetic attraction and repulsion of a magnet.

  As a reduction gear, a gear device capable of relatively easily transmitting with high efficiency is widely used. However, there is a magnetic gear device that transmits torque by magnetic attraction / repulsion of a magnet.

  As a prior art of a magnetic gear device, for example, a plurality of magnetic bars that transmit magnetism are arranged annularly between an inner ring magnetic gear and an outer ring magnetic gear arranged concentrically, and torque input to the inner ring magnetic gear is used as an outer ring magnetic gear. (See Patent Document 1 etc.).

U.S. Pat. No. 3,378,710

  In the magnetic gear device structured as in the above prior art, an input / output rotary shaft or the like is connected to the device, and the inner ring magnetic gear, the outer ring magnetic gear, the magnetic bar, etc. are supported in a state of being relatively rotatable in the circumferential direction. Torque must be transmitted in the state. In addition, a structure such as a magnet or a magnetic bar used in the magnetic gear device is inevitably heavy due to the characteristics of a substance having characteristics necessary for the magnetic gear device. Therefore, it is very important for the support structure that supports these structures to support the structure that is a heavy object in a balanced manner. However, the above prior art does not mention support structures such as an inner ring magnetic gear, an outer ring magnetic gear, and a magnetic bar in the magnetic gear device, and there is a need for improvement in this respect.

  This invention is made | formed in view of the above, and aims at providing the magnetic gear apparatus which can support a structure with sufficient balance.

  In order to achieve the above object, the present invention provides a first rotating shaft and a plurality of magnets arranged in a circumferential direction on an iron core connected to one end of the first rotating shaft and provided around the axis of the first rotating shaft. The first magnetic gear provided with the generated magnetic force generation surface facing outward in the radial direction and the first magnetic gear are coaxially enclosed, and a plurality of magnets are arranged in a circumferential direction on an iron core provided around the axis. A second magnetic gear provided radially inward so that the magnetic force generation surface faces the magnetic force generation surface of the first magnetic gear; and between the opposing magnetic force generation surfaces of the first magnetic gear and the second magnetic gear A plurality of magnetic path members made of electromagnetic steel fixed in a circumferential direction so as to be interposed between the magnetic poles of the first magnetic gear and the second magnetic gear, and the first rotating shaft of the second magnetic gear. And a second rotating shaft connected to the axially opposite end on the axis of the first rotating shaft, The first magnetic gear and the second magnetic gear are provided at the second rotating shaft side end portions, and suppress the relative movement in the radial direction between the first magnetic gear and the second magnetic gear in the circumferential direction. A first support mechanism that supports the relative movement of the second magnetic gear, and a diameter of the second magnetic gear and the magnetic path member provided at the second rotating shaft side end of the second magnetic gear and the magnetic path member. And a second support mechanism that supports relative movement in the circumferential direction while suppressing relative movement in the direction.

  According to the present invention, the structure can be supported with a good balance.

It is a figure which shows schematically the magnetic gear apparatus which concerns on one embodiment of this invention, and is sectional drawing in a surface perpendicular | vertical to a rotating shaft. It is a figure showing roughly the magnetic gear device concerning one embodiment of the present invention, and is a sectional view in the field containing a rotating shaft. It is an expanded sectional view which shows the refrigerant | coolant flow path part in FIG. 1 with the periphery structure. It is sectional drawing which shows roughly the structure of the axial direction of the refrigerant flow path part of FIG. It is a figure which shows the initial stage of the assembly process of a magnetic gear apparatus. It is a figure which shows the 1st step of the assembly process of a magnetic gear apparatus. It is a figure which shows the 2nd step of the assembly process of a magnetic gear apparatus. It is a figure which shows the last stage of the assembly process of a magnetic gear apparatus. It is a figure which shows a mode that the bearing member is removed in the exchange process of the bearing member of a magnetic gear apparatus. It is a figure which shows a mode that the bearing member in the replacement | exchange process of the bearing member of a magnetic gear apparatus is attached. It is the schematic which shows the gas turbine generator provided with the magnetic gear apparatus which concerns on one embodiment of this invention.

(1) Device Configuration An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 11 is a diagram schematically illustrating a gas turbine generator including the magnetic gear device 100 according to the present embodiment.

  In FIG. 11, the gas turbine generator includes a compressor 90 that compresses intake air to generate compressed air, a combustor 91 that combusts and mixes compressed air and fuel from the compressor 90, and a combustor 91. A turbine 92 that is rotationally driven by the combustion gas, an intermediate shaft 93 that connects the turbine 92 and the compressor 90, and transmits the rotation of the turbine 92 to the compressor 90, and is connected to the compressor 90. A magnetic gear device that is connected to the input rotary shaft 1 that is driven to rotate by the rotation of 93, the input rotary shaft 1 and the output rotary shaft 5, and that converts the input rotational speed to the input rotary shaft 1 and outputs it to the output rotary shaft 5. 100 and a generator 94 that is connected to the output rotating shaft 5 and generates electric power according to the rotational speed of the output rotating shaft 5. The input rotary shaft 1, the output rotary shaft 5, and other rotary shafts are arranged coaxially and are rotatably supported by a plurality of bearings 95 and a thrust bearing (not shown).

  1 and 2 are diagrams schematically showing a magnetic gear device 100 according to an embodiment of the present invention. FIG. 1 is a cross-sectional view in a plane perpendicular to a rotation axis, and FIG. 2 is a plane including the rotation axis. FIG.

  1 and 2, a magnetic gear device 100 includes a substantially cylindrical input-side magnetic gear 2, a substantially cylindrical output-side magnetic gear 3 disposed so as to surround the input-side magnetic gear 2 coaxially, A plurality of magnetic path members 4 disposed between the input side magnetic gear 2 and the output side magnetic gear 3 are provided. The magnetic path member 4 is held by a magnetic path member holder 41 described later. The magnetic path member 4 including the input side magnetic gear 2, the output side magnetic gear 3, and the magnetic path member holder 41 is arranged so as to be separated from each other in the radial direction, and is configured not to come into contact by rotational driving. . The input side magnetic gear 2 is coaxially connected to the input rotary shaft 1 at one axial end thereof. Similarly, the output side magnetic gear 3 is coaxially connected to the output rotation shaft 5 at the other axial end (one end opposite to the input rotation shaft 1). That is, the input rotary shaft 1 and the output rotary shaft 5 are coaxially arranged, and the input side magnetic gear 2 and the output side magnetic gear 3 are coaxially arranged.

  The input side magnetic gear 2 includes a shaft center portion 21 provided along the axis of the input rotary shaft 1, an iron core 25 disposed so as to cover the outer periphery of the shaft center portion 21, and a circumferential direction in the iron core 25. And a plurality of magnets 24 embedded side by side. The iron core 25 is formed by laminating thin plate members (for example, silicon steel plates) insulated from each other in the axial direction. Each of the plurality of magnets 24 is formed by laminating thin plate-shaped permanent magnets insulated from each other in the axial direction, and is disposed so as to extend in the axial direction along the axial center portion 21. The plurality of magnets 24 are arranged such that the magnetic poles (N pole 24a and S pole 24b) are oriented in the circumferential direction, and the same poles of adjacent magnets 24 face each other in the circumferential direction. In the input side magnetic gear 2, the magnetic lines of force of the adjacent magnets 24 do not go to the opposite side having the same polarity, and most of the magnetic lines of force act radially outward. That is, in the input side magnetic gear 2, the outer peripheral surface (radially outer surface) is a magnetic force generating surface. As described above, the input-side magnetic gear 2 is provided with a magnetic force generation surface in which a plurality of magnets 24 are arranged in the circumferential direction on the iron core 25 provided around the axis of the input rotation shaft 1 so as to face radially outward.

  The output side magnetic gear 3 is formed in a substantially cylindrical shape and is arranged coaxially with the input side magnetic gear 2, an iron core 33 arranged so as to cover the inner periphery of the outer structure part 31, and an iron core 33 and a plurality of magnets 32 embedded side by side in the circumferential direction. The iron core 33 is formed by laminating thin plate members (for example, silicon steel plates) insulated from each other in the axial direction. Each of the plurality of magnets 32 is formed by laminating thin plate-shaped permanent magnets that are insulated from each other in the axial direction, and is disposed so as to extend in the axial direction along the outer structure portion 31. The plurality of magnets 32 are arranged such that the magnetic poles (N pole 32a and S pole 32b) are directed in the circumferential direction, and the same poles of adjacent magnets 32 face each other in the circumferential direction. In the output side magnetic gear 3, the magnetic lines of force of the adjacent magnets 32 do not go to the opposite side having the same polarity, and most of the magnetic lines of force act radially inward. That is, in the output side magnetic gear 3, the inner peripheral surface (the radially inner surface) serves as a magnetic force generating surface. Thus, the output-side magnetic gear 3 is provided so as to surround the input-side magnetic gear 2 coaxially, and has a magnetic force generation surface in which a plurality of magnets 32 are arranged in the circumferential direction on an iron core 33 provided around the axis. The magnetic gear 2 is provided radially inward so as to face the magnetic force generation surface of the magnetic gear 2.

  The magnetic path member 4 is a resin-made magnetic path (for example, FRP: Fiber Reinforced Plastics, which is a nonmetallic material) formed coaxially between the opposing magnetic force generation surfaces of the input side magnetic gear 2 and the output side magnetic gear 3. By being held by the member holder 41, a plurality are arranged in the circumferential direction. In the magnetic path member holder 41, a plurality of holes extending in the axial direction are provided at equal intervals in the circumferential direction, and thin plate-like electromagnetic steel members insulated from each other are laminated in the holes in the axial direction. The magnetic path member 4 is formed to extend in the axial direction. As a result, the magnetic path member 41 is circumferentially disposed between the magnetic poles of the input side magnetic gear 2 and the output side magnetic gear 3 between the opposing magnetic force generation surfaces of the input side magnetic gear 2 and the output side magnetic gear 3. Are arranged side by side.

  Here, the details of the magnetic gear device 100 will be further described with reference to FIGS. 3 and 4 in addition to FIG. 2. 3 is an enlarged view showing a connecting portion between the magnetic gear and the rotating shaft in FIG. 2, and FIG. 4 is an enlarged view showing a supporting mechanism portion in FIG.

  The input rotating shaft 1 has a flange structure portion 1a at an end portion on the input side magnetic gear 2 side. The flange structure portion 1a is configured to have the same diameter as that of the input side magnetic gear 2, and is formed so as not to come into contact with other members even when the input rotary shaft 1 and the input side magnetic gear 2 are rotated. Yes. The input rotary shaft 1 is connected to the input side magnetic gear 2 by coupling the flange structure portion 1a from the axial direction to the shaft center portion 21 of the input side magnetic gear 2 with a plurality of bolts 1b. Moreover, the magnet 24 and the iron core 25 are hold | maintained from the axial direction because the flange structure part 1a is couple | bonded with the axial center part 21 of the input side magnetic gearwheel 2. FIG.

  The input side magnetic gear 2 has an end structure portion 2 a at the end opposite to the input rotation shaft 1. The end structure portion 2a is coupled to the shaft center portion 21 of the input side magnetic gear 2 by a plurality of bolts 2b from the axial direction. By coupling the end structure portion 2a to the shaft center portion 21 of the input side magnetic gear 2, the magnet 24 and the iron core 25 are held from the axial direction.

  The output rotating shaft 5 has a flange structure portion 5a at an end portion on the output side magnetic gear 3 side. The flange structure portion 5a is configured to have the same diameter as that of the output side magnetic gear 3, and is formed so as not to come into contact with other members even when the output rotary shaft 5 and the output side magnetic gear 3 are rotated. Yes. The output rotating shaft 5 is connected to the output side magnetic gear 3 by coupling the flange structure portion 5a to the outer structure portion 31 of the output side magnetic gear 3 with a plurality of bolts 5b from the axial direction. Moreover, the magnet 32 and the iron core 33 are hold | maintained from the axial direction because the flange structure part 5a is couple | bonded with the outer structure part 31 of the output side magnetic gearwheel 3. FIG.

  The output-side magnetic gear 3 has an end structure portion 3 a at the end opposite to the output rotation shaft 5. The end structure portion 3a is coupled to the outer structure portion 31 of the output side magnetic gear 3 by a plurality of bolts 3b from the axial direction. By coupling the end structure portion 3a to the outer structure portion 31 of the output side magnetic gear 3, the magnet 32 and the iron core 33 are held from the axial direction.

  The magnetic path member 4 has a holding structure 43 at the end on the input rotary shaft 1 side. The holding structure 43 is coupled to the magnetic path member holder 41 of the magnetic path member 4 by a plurality of bolts 43b from the axial direction. Since the holding structure 43 is coupled to the magnetic path member holder 41 of the magnetic path member 4, the magnetic path member 4 is held from the axial direction. The holding structure 43 is fixed to a base 99 (see FIG. 8 and the like) provided in the gas turbine generator with a plurality of bolts 99b. Thus, the magnetic path member 4 and the magnetic path member holder 41 are disposed between the magnetic poles of the input side magnetic gear 2 and the output side magnetic gear 3 between the opposing magnetic force generation surfaces of the input side magnetic gear 2 and the output side magnetic gear 3. Arranged and fixed in the circumferential direction so as to intervene. In addition, the magnetic path member 4 has an end structure portion 4a at an end portion on the output rotating shaft 5 side. The end structure portion 4a is coupled to the magnetic path member holder 41 with a plurality of bolts 4b from the axial direction. By connecting the end structure portion 4a to the magnetic path member holder 41, the magnetic path member 4 is held from the axial direction.

  As shown in FIGS. 2 to 4, the magnetic gear device 100 is provided at the output rotary shaft 5 side ends of the input side magnetic gear 2 and the output side magnetic gear 3, and the input side magnetic gear 2 and the output side magnetism are provided. The first support mechanism 6 that supports relative movement in the circumferential direction while suppressing relative movement in the radial direction with respect to the gear 3, and the magnetic path member 4 including the output side magnetic gear 3 and the magnetic path member holder 41. A second support mechanism 7 provided at an end of the output rotating shaft 5 and supporting the relative movement in the circumferential direction while suppressing the relative movement in the radial direction between the output side magnetic gear 3 and the magnetic path member 4; It has.

  The first support mechanism 6 includes a support protrusion 61 provided along the axis at the end of the input side magnetic gear 2 on the output rotation shaft 5 side (that is, the end structure portion 2 a), and the input of the output rotation shaft 5. A support recess 61 is provided at the end of the side magnetic gear 2 so that the support protrusion 61 can be inserted from the axial direction, and a radial gap between the support protrusion 61 and the support recess 62 is provided to extend in the circumferential direction. And a bearing member 63.

  The support protrusion 61 is formed so that the outer diameter on the tip side (the output rotating shaft 5 side, the right side in FIGS. 2 to 4) becomes smaller with the stepped portion 61 a as a boundary. Further, the bearing member 63 is formed so that its inner diameter matches the outer diameter of the front end side of the support protrusion 61. And the bearing member 63 is inserted from the front end side of the support protrusion 61 to the step part 61a, and the movement to the input side magnetic gear 2 side of an axial direction is restrict | limited by the step part 61a.

  The support recess 62 is formed so that its inner diameter matches the outer diameter of the pairing member 63. Moreover, the support recessed part 62 is formed so that the inner diameter of the back side (the output rotating shaft 5 side, the left side in FIGS. 2 to 4) becomes small with the stepped part 62a as a boundary. The bearing member 63 is inserted from the opening side (input side magnetic gear 2 side) of the support recess 62 to the stepped portion 62a, and the stepped portion 62a restricts the movement of the bearing member 63 toward the output rotating shaft 5 in the axial direction.

  Dimensions such as the axial length of the support protrusion 61, the position of the stepped portion 61a, the depth of the support recessed portion 62 in the axial direction, the position of the stepped portion 61a, the width of the bearing member 63 in the axial direction, etc. Are set so that the input side magnetic gear 2 and the output rotating shaft 5 having no contact with each other.

  The second support mechanism 7 includes a support projection 71 provided so as to project in an annular shape around the axis at the output rotation shaft 5 side end portion (that is, the end structure portion 4a) of the magnetic path member 4, and an output A support recess 72 provided on the input side magnetic gear 2 side end of the rotary shaft 5 so as to extend in an annular shape around the axis so that the support projection 71 can be inserted from the axial direction, and the support projection 71 and the support recess And a bearing member 73 provided so as to extend in the circumferential direction in the radial gap of 72.

  The support protrusion 71 is formed so that the outer diameter (that is, the outer diameter of the annular support protrusion 71) on the tip side (the output rotation shaft 5 side, the right side in FIGS. 2 to 4) is reduced with the stepped portion 71 a as a boundary. ing. Further, the bearing member 73 is formed so that the inner diameter thereof matches the outer diameter of the front end side of the support protrusion 71. And the bearing member 73 is inserted from the front end side of the support protrusion 71 to the level | step-difference part 71a, and the movement to the input side magnetic gear 2 side of an axial direction is restrict | limited by the level | step-difference part 71a.

  The support recess 72 is formed so that its inner diameter matches the outer diameter of the pairing member 73. The support recess 72 has an inner diameter (that is, the diameter of the inner wall on the radially outer side of the annular support recess 72) on the back side (the output rotation shaft 5 side, the left side in FIGS. 2 to 4) with respect to the stepped portion 72a. Is formed to be small. And the bearing member 73 is inserted from the opening side (input side magnetic gear 2 side) of the support recessed part 72 to the level | step-difference part 72a, and the movement to the output rotating shaft 5 side of an axial direction is restrict | limited by the level | step-difference part 72a.

  Dimensions such as the axial length of the support protrusion 71, the position of the stepped portion 71a, the depth of the support recessed portion 72 in the axial direction, the position of the stepped portion 71a, the width of the bearing member 73 in the axial direction, etc. Are set so that the magnetic path member 4 and the output rotating shaft 5 having no contact with each other.

  As described above, the magnetic path member 4 including the input side magnetic gear 2, the output side magnetic gear 3, and the magnetic path member holder 41 constituting the magnetic gear device 100 is obtained by the first support mechanism 6 and the second support mechanism 7. Further, by suppressing the relative movement in the radial direction, the shift of the central axis is suppressed, and the relative movement in the circumferential direction is supported.

  In each of the input side magnetic gear 2 and the output side magnetic gear 3, the plurality of magnets 24 and 32 on the magnetic force generation surface are weight-calculated and arranged so that the center of gravity in the plane perpendicular to the axis is on the axis. That is, in each of the input side magnetic gear 2 and the output side magnetic gear 3, the weights of the magnets 24 and 32 are measured before the placement, and the center of gravity by the magnets 24 and 32 is on the axis, that is, the center of rotation. Be placed. Further, on the outer side in the axial direction of the flange portion 1a of the input rotation shaft 1, the end structure portion 2a of the input side magnetic gear 2, the end structure portion 3a of the output side magnetic gear 3, and the flange portion 5a of the output rotation shaft 5, A plurality of balance weights 1c, 2c, 3c, 5c are arranged. By adjusting the positions of the balance weights 1c, 2c, 3c, 5c in the circumferential direction and the radial direction, fine adjustment of the rotation balance adjusted by the arrangement of the magnets 24, 32 can be performed.

(2) Principle of Operation Here, the relationship between the rotational speeds of the input rotary shaft 1 and the output rotary shaft 5 of the magnetic gear device 100 will be described.

  The relationship between the rotational speed of the input rotary shaft 1 (input-side magnetic gear 2) and the rotational speed of the output rotary shaft 5 (output-side magnetic gear 3) of the magnetic gear device 100 is the logarithm of polarity on the magnetic force generation surface of the input-side magnetic gear 2. And the ratio of the logarithm of polarity on the magnetic force generating surface of the output side magnetic gear 3. In other words, the relationship between the rotational speed of the input rotary shaft 1 and the rotational speed of the output rotary shaft 5 is determined by the ratio of the polar logarithm of the magnet 24 of the input side magnetic gear 2 and the polar logarithm of the magnet 32 of the output side magnetic gear 3. That is. That is, the rotational speed (input rotational speed) of the input rotary shaft 1 is Nin, the polar logarithm of the magnet 24 provided on the input side magnetic gear 2 is Xin, the rotational speed (output rotational speed) of the output rotary shaft 5 is Nout, and output. When the polarity logarithm of the magnet 32 provided in the side magnetic gear 3 is Xout, the relationship between the input rotation speed Nin and the output rotation speed Nout is expressed by the following formula 1.

Nin: Nout = Xout: Xin (Formula 1)
For example, as shown in the present embodiment (see FIG. 1), if the polarity logarithm of the magnet 24 is 7 and the polarity logarithm of the magnet 32 is 17, the ratio between the input rotation speed Nin and the output rotation speed Nout is 17: 7

  The transmittable torque between the input side magnetic gear 2 and the output side magnetic gear 3 increases as the volumes of the magnets 24 and 32 increase. At that time, the iron cores 25 and 33 and the magnetic path member 4 need to have dimensions that do not cause magnetic saturation. When the number of magnetic path members 4 is the sum of the polar logarithm of the magnetic force generation surface of the input side magnetic gear 2 and the polar logarithm of the magnetic force generation surface of the output side magnetic gear 3, the output rotation from the input rotary shaft 1 The torque that can be transmitted to the shaft 5 is the maximum (maximum value). This knowledge is obtained by simulation using Fourier analysis or the like. For example, as in the present embodiment, when the polarity logarithm of the magnetic force generation surface of the input side magnetic gear 2 is 7 and the polarity logarithm of the magnetic force generation surface of the output side magnetic gear 3 is 17, the number of the magnetic path members 4 Is 24, the torque that can be transmitted between the input side magnetic gear 2 and the output side magnetic gear 3 becomes the maximum (maximum value).

(3) Assembly Process Next, the assembly process of the magnetic gear device 100 configured as described above will be described with reference to the drawings. 5-8 is a figure which shows the assembly process of a magnetic gear apparatus.

  As shown in FIG. 5, in the assembly process, first, the output-side magnetic gear 3 to which the output rotation shaft 5 is connected is placed on the base 80 with the output rotation shaft 5 side facing downward so that the axis is vertical. . In the output-side magnetic gear 3, the flange structure portion 5a of the output rotating shaft 5 is coupled to the outer structure portion 31 with a plurality of bolts 5b in advance, the magnet 32 and the iron core 33 are disposed, and the end structure portion 3a is connected to the plurality of bolts. The rotation balance is adjusted by the balance weights 3c, 5c and the like.

  Next, the bearing member 73 is fitted into the support concave portion 72 of the output rotating shaft 5 constituting the second support mechanism 7, and the magnetic path member 4 is output with the end structure portion 4a facing downward so that the axis is vertical. The support protrusion 71 constituting the second support mechanism 7 is inserted into the side magnetic gear 3 and inserted into the bearing member 73. The magnetic path member 4 is arranged in advance by connecting the end structure portion 4a to the magnetic path member holder 41 with a plurality of bolts 4b.

  Subsequently, the bearing member 63 is fitted into the support recess 62 of the output rotation shaft 5 constituting the first support mechanism 6.

  Next, as shown in FIG. 6, the magnetic path member including the magnetic path member 4 with the input side magnetic gear 2 connected to the input rotary shaft 1 facing the end structure portion 2a downward so that the axis is vertical. Inserted into the holder 41, the support protrusion 61 constituting the first support mechanism 6 is inserted into the bearing member 63. In the input-side magnetic gear 2, the flange structure portion 1a of the input rotary shaft 1 is coupled to the shaft center portion 21 in advance by a plurality of bolts 1b, the magnet 24 and the iron core 25 are disposed, and the end structure portion 2a is connected to the plurality of bolts. The rotation balance is adjusted by the balance weights 1c, 2c, etc.

  Next, as shown in FIG. 7, the holding structure 43 is coupled to the magnetic path member holder 41 of the magnetic path member 4 by a plurality of bolts 43b.

  Next, as shown in FIG. 8, the holding structure 43 of the magnetic gear device 100 is fixed to the base 99 provided in the gas turbine generator with a plurality of bolts 99b, and the output rotating shaft 5 is connected to the generator 94 side. The input rotary shaft 1 is connected to the turbine 92 side.

(4) Replacement Process The replacement process of the bearing members 63 and 73 of the magnetic gear device 100 configured as described above will be described with reference to the drawings. 9 and 10 are diagrams showing a replacement process of the bearing member of the magnetic gear device.

  As shown in FIG. 9, in the replacement process of the bearing members 63 and 73, first, the input rotating shaft 1 and the output rotating shaft 5 of the magnetic gear device 100 are removed from the gas turbine generator, and further the magnetic gear device 100 is held. The structural portion 43 is removed from the base portion 99 and placed on the base 81 so that the axis is horizontal.

  Next, the plurality of bolts 5b connecting the flange structure portion 5a to the outer structure portion 31 of the output side magnetic gear 3 are removed. Subsequently, the floating bolt 82 is inserted into the bolt hole through which the bolt 5b of the flange structure 5a is passed. In this state, the output rotary shaft 5 is moved in the axial direction while maintaining the positional relationship in which the output rotary shaft 5, the magnetic path member 4 (magnetic path member holder 41), and the input side magnetic gear 3 are concentric. Further, the bearing members 63 and 73 are moved in the axial direction and removed.

  Thereafter, new bearing members 63 and 73 are inserted and attached in the axial direction, and the output rotating shaft 5, the magnetic path member 4 (magnetic path member holder 41), and the input side magnetic gear 3 are connected using the floating bolt 82. Inserting from the axial direction while maintaining the concentric positional relationship. Subsequently, the flange structure 5a is coupled to the outer structure 31 of the output side magnetic gear 3 by the bolt 5b, and the output rotating shaft 5 is connected. Thereby, replacement | exchange can be implemented, without damaging the bearing members 63 and 73. FIG. And the holding structure part 43 of the magnetic gear apparatus 100 is attached to the base 99, and the input rotating shaft 1 and the output rotating shaft 5 are attached to a gas turbine generator.

  Needless to say, the above assembly process and replacement process are carried out by installing eyebolts or the like on each component as necessary and transporting them using equipment such as a crane.

(5) Device Operation The operation of the present embodiment configured as described above will be described.

  When the compressor 90 and the turbine 92 are started and the input rotary shaft 1 is rotationally driven, the input-side magnetic gear 2 of the magnetic gear device 100 is rotationally driven. The magnetic force generating surface of the input side magnetic gear 2 and the magnetic force generating surface of the output side magnetic gear 3 are magnetically meshed with each other via the magnetic path member 4. Specifically, when the input-side magnetic gear 2 rotates relative to the magnetic path member 4, the opposing surfaces of the magnetic path members 4 that face the input-side magnetic gear 2 and the output-side magnetic gear 3 become N-pole or S-pole. Magnetized alternately. In this way, the output side magnetic gear 3 is rotationally driven in the circumferential direction by the magnetic attractive force or repulsive force acting between the magnetized magnetic path member 4 and the magnetic force generating surface of the output side magnetic gear 3. That is, the magnetic gear device 100 transmits the rotational power of the input rotary shaft 1 to the output rotary shaft 5 by causing the magnetic path member 4 to function like a planetary gear.

(6) Effects The effects of the present embodiment configured as described above will be described.

  As a reduction gear, a gear device capable of relatively easily transmitting with high efficiency is widely used. However, there is a magnetic gear device that transmits torque by magnetic attraction / repulsion of a magnet. As a prior art of a magnetic gear device, for example, a plurality of magnetic bars that transmit magnetism are arranged annularly between an inner ring magnetic gear and an outer ring magnetic gear arranged concentrically, and torque input to the inner ring magnetic gear is used as an outer ring magnetic gear. There is something to communicate to. In the magnetic gear device having the structure as in the prior art, an input / output rotary shaft or the like is connected to the device, and the inner ring magnetic gear, the outer ring magnetic gear, the magnetic bar, and the like are supported so as to be relatively rotatable in the circumferential direction. Torque must be transmitted in the state. In addition, a structure such as a magnet or a magnetic bar used in the magnetic gear device is inevitably heavy due to the characteristics of a substance having characteristics necessary for the magnetic gear device. Therefore, it is very important for the support structure that supports these structures to support the structure that is a heavy object in a balanced manner. However, the above prior art does not mention support structures such as an inner ring magnetic gear, an outer ring magnetic gear, and a magnetic bar in the magnetic gear device, and there is a need for improvement in this respect.

  On the other hand, in the embodiment of the present invention, the first support mechanism 6 is provided at the end of the input side magnetic gear 2 and the output side magnetic gear 3 on the output rotating shaft 5 side, and the input side magnetic gear 2 and the output side magnetic gear 2 are arranged. Supporting the relative movement in the circumferential direction while suppressing the relative movement in the radial direction with the gear 3, and supporting the output side magnetic gear 3 and the magnetic path member 4 on the output rotation shaft 5 side end portion. Since the mechanism 7 is provided and configured to support the relative movement in the circumferential direction while suppressing the relative movement in the radial direction between the output side magnetic gear 3 and the magnetic path member 4, in the magnetic gear device, The structure can be supported with a good balance.

1 Input rotation axis (first rotation axis)
2 Input side magnetic gear (first magnetic gear)
3 Output side magnetic gear (second magnetic gear)
4 Magnetic path member 5 Output rotating shaft (second rotating shaft)
6 Support mechanism (first support mechanism)
7 Support mechanism (second support mechanism)
21 Axis center part 24, 32 Magnet 25, 33 Iron core 41 Magnetic path member holder 43 Holding part 80, 81 Base 82 Floating bolt 90 Compressor 91 Combustor 92 Turbine 93 Intermediate shaft 94 Generator 95 Bearing 99 Base 100, 100A Magnetic gear apparatus

Claims (4)

A first rotation axis;
A first magnetic gear connected to one end of the first rotating shaft, and having a magnetic force generating surface in which a plurality of magnets are arranged in a circumferential direction on an iron core provided around the axis of the first rotating shaft and facing radially outward; ,
A magnetic force generating surface that is provided coaxially around the first magnetic gear and has a plurality of magnets arranged in a circumferential direction on an iron core provided around an axis thereof has a diameter so as to face the magnetic force generating surface of the first magnetic gear. A second magnetic gear provided toward the inner side in the direction;
Made of electromagnetic steel fixedly arranged in the circumferential direction so as to be interposed between the magnetic poles of the first magnetic gear and the second magnetic gear between the opposing magnetic force generation surfaces of the first magnetic gear and the second magnetic gear. A plurality of magnetic path members;
A second rotating shaft connected on an axis of the first rotating shaft to an end of the second magnetic gear opposite to the first rotating shaft in the axial direction;
Provided at the second rotating shaft side end of the first magnetic gear and the second magnetic gear, in the circumferential direction while suppressing the relative movement of the first magnetic gear and the second magnetic gear in the radial direction. A first support mechanism that supports the relative movement of the first support mechanism;
The second magnetic gear and the magnetic path member are provided at the second rotating shaft side ends, and the relative movement in the circumferential direction is suppressed while suppressing the relative movement in the radial direction between the second magnetic gear and the magnetic path member. A magnetic gear device comprising a second support mechanism for supporting movement. The magnetic gear device according to claim 1,
The first support mechanism includes:
A first support protrusion provided along the axis at the second rotating shaft side end of the first magnetic gear;
A first support recess provided so that the first support protrusion can be inserted from an axial direction at an end of the second rotation shaft on the first magnetic gear side;
A magnetic gear device comprising a bearing member provided to extend in a circumferential direction in a radial gap between the first support protrusion and the first support recess. The magnetic gear device according to claim 1 or 2,
The second support mechanism includes
A second support protrusion provided so as to protrude in an annular shape around an axis at the end of the magnetic path member on the second rotating shaft side;
A second support recess provided to extend annularly around an axis so that the first support protrusion can be inserted from the axial direction at the end of the second rotating shaft on the first magnetic gear side;
A magnetic gear device comprising: a bearing member provided to extend in a circumferential direction in a radial gap between the second support protrusion and the second support recess. The magnetic gear device according to claim 1,
A magnetic gear device comprising weights disposed on both axial ends of the first and second magnetic gears for balancing the rotation of the first and second magnetic gears.

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