JP2012085388A - Rotary electric machine and wind power generation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine that enables easy replacement of a rotary shaft support part.SOLUTION: A generator 1 (rotary electric machine) includes: a rotary shaft part 7b; a rotor 31 including a rotor core 32 and separably attached to the rotary shaft part 7b; a stator 21 including a stator core 22 disposed in radial opposition to the rotor core 32; and a bearing part 51 rotatably supporting the rotary shaft part 7b. The separation of the rotary shaft part 7b from the rotor 31 enables replacement of the bearing part 51 with the rotor core 32 and the stator core 22 kept opposed to each other.

Description

  The present invention relates to a rotating electrical machine and a wind power generator, and more particularly to a rotating electrical machine and a wind power generator having a rotating shaft portion.

  Conventionally, a rotating electrical machine having a rotating shaft portion is known (for example, see Patent Document 1). Patent Document 1 discloses a wind power generator provided with a generator (rotating electric machine) having a rotating shaft portion. The generator of this wind power generator is provided at one end of the rotating shaft on the side opposite to the side where the blades are provided. Here, the conventional generator as described in Patent Document 1 includes a rotor attached to the rotating shaft portion, a stator arranged to face the rotor, and a bearing that rotatably supports the rotating shaft portion. (Rotating shaft support part).

Japanese Patent Laid-Open No. 2005-382091

  However, in the conventional generator (rotating electric machine) as described above, when the bearing (rotating shaft support portion) is replaced, the rotating shaft portion supported by the bearing and the rotating shaft portion are attached together with the bearing. There is an inconvenience that a rotor having a large outer diameter needs to be removed from the generator. For this reason, in the conventional generator (rotating electrical machine) as described above, there is a problem that the bearing (rotating shaft support portion) cannot be easily replaced.

  The present invention has been made to solve the above-described problems, and one object of the present invention is to provide a rotating electrical machine and a wind power generator capable of easily exchanging a rotating shaft support. It is to be.

Means for Solving the Problems and Effects of the Invention

  To achieve the above object, a rotating electric machine according to a first aspect of the present invention includes a rotating shaft portion, a rotor core, a rotor that is separably attached to the rotating shaft portion, and a rotor core that faces the rotor core in a radial direction. A stator including a stator core to be disposed, and a rotation shaft support portion that rotatably supports the rotation shaft portion. The rotation shaft support portion is separated from the rotor so that the rotor core and the stator core face each other. Can be replaced.

  In the rotating electrical machine according to the first aspect of the present invention, as described above, by separating the rotating shaft portion from the rotor, the rotating shaft support portion is configured to be replaceable with the rotor core and the stator core facing each other. When replacing the rotating shaft support, the rotating shaft support can be replaced while the rotor core and the stator core are opposed to each other by separating the rotating shaft from the rotor. The rotating shaft support can be exchanged without being removed from the electric machine. Thereby, when exchanging the rotating shaft support, it is easier to replace the rotating shaft support compared to the case where it is necessary to remove the rotor having a large outer diameter together with the rotating shaft support from the rotating electrical machine. Can do.

  A wind turbine generator according to a second aspect of the present invention includes a generator including a rotating shaft portion and a blade connected to the rotating shaft portion of the generator. The generator includes a rotor core, and the rotating shaft. And a rotor having a stator core disposed so as to be opposed to the rotor core in a radial direction, and a rotating shaft support portion that rotatably supports the rotating shaft portion. By separating the parts, the rotary shaft support part can be exchanged in a state where the rotor core and the stator core face each other.

  In the wind turbine generator according to the second aspect of the present invention, as described above, by separating the rotating shaft portion from the rotor, the rotating shaft support portion is configured to be replaceable with the rotor core and the stator core facing each other. When replacing the rotating shaft support portion, the rotating shaft portion can be replaced with the rotor core and the stator core facing each other by separating the rotating shaft portion from the rotor. The rotating shaft support can be replaced without being removed from the generator. Thereby, when exchanging the rotating shaft support, it is easier to replace the rotating shaft support than when it is necessary to remove the rotor having a large outer diameter together with the rotating shaft support from the generator. It is possible to obtain a wind power generator equipped with a generator that can In particular, since the generator used in the wind turbine generator has a large rotor weight, the present invention is effective in that it is not necessary to remove the rotor from the generator when replacing the rotating shaft support.

It is a figure which shows the whole structure of the wind power generator provided with the generator by 1st Embodiment of this invention. It is the top view which looked at the state which removed the cover of the generator by 1st Embodiment of this invention from the back side (Z2 direction side). FIG. 4 is a partial cross-sectional view taken along line 400-400 in FIG. 2. It is the fragmentary sectional view which showed the state from which the rotor and rotating shaft part of the generator by 1st Embodiment of this invention were mutually separable. It is the fragmentary sectional view which showed the state by which the rotor of the generator by 1st Embodiment of this invention was fixed to the rotor fixing | fixed part. It is the fragmentary sectional view which showed the state by which the rotating shaft part of the generator by 1st Embodiment of this invention was extracted from the rotor. It is the fragmentary sectional view which showed the generator by 2nd Embodiment of this invention. It is the fragmentary sectional view which showed the state from which the rotor and rotating shaft part of the generator by 2nd Embodiment of this invention were mutually separable. It is the fragmentary sectional view which showed the state by which the rotating shaft part of the generator by 2nd Embodiment of this invention was extracted from the rotor. It is the fragmentary sectional view which showed the generator by the modification of 1st Embodiment of this invention. It is the fragmentary sectional view which showed the state by which the rotating shaft part of the generator by the modification of 1st Embodiment of this invention was extracted from the rotor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-3, the structure of the wind power generator 100 by 1st Embodiment of this invention is demonstrated. In addition, 1st Embodiment demonstrates the example which applies the rotary electric machine of this invention used for the wind power generator 100 to the generator 1. FIG.

  As shown in FIG. 1, the wind turbine generator 100 includes a generator 1, a speed increaser 2 to which the power generator 1 is attached, a nacelle 3 for housing the power generator 1 and the speed increaser 2, a rotor hub 4, The blade 5 and the tower (support column) 6 are configured. Further, the rotor hub 4 is attached to the rotary shaft portion 7. A plurality of blades 5 are attached to the rotor hub 4. The nacelle 3 is attached to the tower 6. The rotating shaft portion 7 is configured by connecting two rotating shaft portions 7 a and 7 b in the axial direction by the coupling portion 8.

  As shown in FIGS. 2 and 3, the generator 1 is capable of rotating the frame 11, the stator 21, the rotor 31, the cover 41 (see FIG. 3), the rotating shaft portion 7 b, and the rotating shaft portion 7 b. It is mainly comprised by the bearing part 51 (refer FIG. 3) to support. The bearing portion 51 is an example of the “rotary shaft support portion” in the present invention. Further, as shown in FIG. 3, the frame 11 is integrated with the side surface portion 12 formed in a cylindrical shape and the end portion on the side (Z1 direction side, front side) where the coupling portion 8 of the side surface portion 12 is disposed. And a front surface portion 13 that is formed as an example. As shown in FIGS. 2 and 3, a plurality of screw holes 121 are formed on the end surface of the side surface portion 12 opposite to the side where the coupling portion 8 is disposed (Z2 direction side, rear side). ing. As shown in FIG. 3, the plurality of screw holes 121 are configured such that bolts 61 for attaching the cover 41 to the frame 11 are screwed together. Further, as shown in FIG. 2, the plurality of screw holes 121 are arranged at substantially equal angular intervals in the circumferential direction. Further, as shown in FIG. 3, the front surface portion 13 is formed so as to extend inward in the radial direction from the end portion of the side surface portion 12, and is formed in a disk shape having an opening in the center portion.

  A cylindrical bracket 14 is integrally formed with the front surface portion 13 at the radially inner end of the front surface portion 13. The bracket 14 is formed so as to protrude on both the side (Z1 direction side, front side) on which the coupling portion 8 is disposed and the opposite side (Z2 direction side, rear side) with respect to the front surface part 13. . Further, the bracket 14 is formed with a plurality of through holes 141 extending in the axial direction (Z direction) of the rotary shaft portion 7b. The through hole 141 is configured such that a stat bolt 63 for attaching the bearing portion 51 to the bracket 14 can be inserted. Further, as shown in FIG. 2, the stat bolts 63 inserted into the plurality of through holes 141 are arranged at substantially equal angular intervals in the circumferential direction.

  Further, a rotor fixing portion 15 for fixing the rotor 31 when the bearing portion 51 is replaced is provided at a corner portion between the front surface portion 13 and the bracket 14. The rotor fixing portion 15 is formed in an annular shape. Further, the rotor fixing portion 15 is fixedly attached to the front surface portion 13 and the bracket 14 by welding inside the generator 1. A plurality of screw holes 151 are formed on the surface of the rotor fixing portion 15 on the side facing the rotor 31 (Z2 direction side). The plurality of screw holes 151 are arranged at substantially equal angular intervals in the circumferential direction, and are arranged at positions corresponding to later-described screw insertion holes 331 of the rotor 31. Further, the screw hole 151 is configured so that a bolt 65 described later used when the rotor 31 is fixed to the rotor fixing portion 15 can be screwed.

  The stator 21 is fixedly attached to the inner side surface of the side surface portion 12 of the frame 11. The stator 21 is composed of a stator core 22 having a flat cylindrical shape and a winding 23. Stator core 22 is made of, for example, laminated silicon steel plates. A plurality of slots (not shown) are provided on the inner peripheral surface of the stator core 22. The winding 23 is housed in a slot of the stator core 22. Further, the winding 23 is constituted by a plurality of windings capable of energizing, for example, a U-phase, V-phase, and W-phase three-phase current.

  The rotor 31 includes a rotor core 32, a disk-shaped rotor main body portion 33 disposed inside the rotor core 32 in the radial direction, and a permanent magnet 34 disposed on the outer peripheral portion of the rotor core 32. The rotor core 32 is formed in a flat cylindrical shape, and is disposed so as to face the stator core 22 in the radial direction (X direction). The rotor core 32 is made of, for example, laminated silicon steel plates. Further, the permanent magnet 34 is disposed in a portion of the rotor core 32 that faces the stator core 22.

  Further, the rotor body 33 has a plurality of screw insertion holes 331 extending in the axial direction (Z direction) of the rotating shaft 7b. As shown in FIG. 2, the plurality of screw insertion holes 331 are arranged at substantially equal angular intervals in the circumferential direction. The screw insertion hole 331 is configured such that a bolt 65 (described later) used when the rotor 31 is fixed to the rotor fixing portion 15 can be inserted. The disk-shaped rotor main body 33 has a circular opening 332 at the center. The rotation shaft 7b is inserted into the opening 332. Moreover, the opening part 332 has the internal diameter D1, as shown to FIG. 2 and FIG.

  As shown in FIG. 3, a step 333 is formed between the opening 332 of the rotor body 33 and the screw insertion hole 331. It is attached. Specifically, the stepped portion 333 is formed in a concave shape that is recessed in the forward direction (Z1 direction). A screw hole 333a into which the bolt 62 can be screwed is formed on the concave bottom surface (surface on the Z2 direction side) of the stepped portion 333. Moreover, the rotating shaft part 7b has the flange part 7c extended in a radial direction at the rear-end part on the opposite side (Z2 direction side) from the side by which the coupling part 8 is arrange | positioned. The flange portion 7c is formed with a plurality of screw insertion holes 7d extending in the axial direction (Z direction) of the rotating shaft portion 7b. The rotor 31 is configured such that the bolt 62 inserted into the screw insertion hole 7d is screwed into the screw hole 333a in a state where the flange portion 7c of the rotation shaft portion 7b is fitted in the stepped portion 333, whereby the rotation shaft portion 7b. It is attached to separably.

  The cover 41 has a disk shape and is configured to cover the rear side (Z2 direction side) of the generator 1. Further, as shown in FIG. 3, the cover 41 is configured to be screwed to the side surface portion 12 of the frame 11. Specifically, the cover 41 has a plurality of screw insertion holes 411 extending in the axial direction (Z direction) of the rotary shaft portion 7 b, and is formed on the side surface portion 12 of the frame 11 by bolts 61 inserted into the screw insertion holes 411. It is configured to be fixedly attached.

  The bearing portion 51 is configured to rotatably support the rotary shaft portion 7b in a cantilever manner. Moreover, the bearing part 51 is formed in the cylindrical shape so that the rotating shaft part 7b may be surrounded. Further, the bearing portion 51 is firmly fitted to the rotating shaft portion 7b. Further, as shown in FIG. 3, the cylindrical bearing portion 51 is disposed inside the cylindrical bracket 14 of the frame 11. A front bearing cover 511 and a rear bearing cover 512 are provided on the front side (Z1 direction side) and the rear side (Z2 direction side) of the bearing portion 51, respectively.

  Both the front bearing cover 511 and the rear bearing cover 512 are formed in an annular shape so as to surround the rotating shaft portion 7b. The front bearing cover 511 is arranged so as to cover substantially the entire front surface (surface in the Z1 direction) of the bearing portion 51, and is configured to restrict the bearing portion 51 from moving forward (Z1 direction). Yes. The rear bearing cover 512 is disposed so as to cover substantially the entire rear surface (surface in the Z2 direction) of the bearing portion 51, and is configured to restrict the bearing portion 51 from moving rearward (Z2 direction). Has been. Further, as shown in FIGS. 2 and 3, the rear bearing cover 512 has an outer diameter D <b> 2 that is smaller than the inner diameter D <b> 1 of the opening 332 of the rotor 31. Further, a screw insertion hole 511 a is formed in the front bearing cover 511 at a position corresponding to the through hole 141 of the bracket 14. The screw insertion hole 511a is configured such that a stat bolt 63 for fixing the bearing portion 51 to the frame 11 can be inserted. Further, the rear bearing cover 512 is fixed to the stat bolt 63. Further, the front bearing cover 511 and the rear bearing cover 512 are configured so as to firmly sandwich the bearing portion 51 from the front and rear directions by being tightened by the nut 64 from the front side (Z1 direction side) of the front bearing cover 511. ing. Thereby, the bearing portion 51 is fixedly attached to the frame 11. The rear bearing cover 512 is an example of the “mounting member” in the present invention.

  With the configuration as described above, in the generator 1 according to the first embodiment, when the rotating shaft portion 7b that is rotatably supported by the bearing portion 51 rotates, the rotor 31 together with the rotating shaft portion 7b is relative to the stator 21. It is configured to be rotated.

  Next, with reference to FIGS. 3-6, the replacement | exchange procedure of the bearing part 51 of the generator 1 by 1st Embodiment is demonstrated.

  First, as shown in FIG. 3, from the completed state of the generator 1 with the bearing portion 51 attached to the frame 11, the bolt 61 is removed and the cover 41 is removed as shown in FIG. While removing the tightened nut 64, the bolt 62 that connects the rotating shaft portion 7b and the rotor 31 to each other is removed. In this state, the rotor 31 is restricted from moving in the radial direction (X direction) because the flange portion 7c of the rotating shaft portion 7b is fitted into the stepped portion 333. On the other hand, the rotor 31 is separated from the rotating shaft portion 7b and is movable in the axial direction (Z direction). Further, since the nut 64 is removed, the front-side bearing cover 511 and the rear-side bearing cover 512 are released from tightening in the front-rear direction with respect to the bearing portion 51, so that the bearing portion 51 extends in the axial direction (Z direction). It can move. Further, the rotary shaft portion 7b can also be moved in the axial direction while being separated from the rotor 31.

  Next, as shown in FIG. 5, the bolt 65 is screwed into the screw hole 151 of the rotor fixing portion 15 through the screw insertion hole 331 of the rotor 31. Then, by tightening the bolt 65, the rotor 31 is fixed to the rotor fixing portion 15 so as to restrict the movement of the rotor 31 with respect to the frame 11. As a result, the rotor 31 is fixed to the frame 11 with the stator core 22 and the rotor core 32 facing each other. The bolt 65 is an example of the “fastening member” in the present invention.

  Then, as shown in FIG. 6, the rotating shaft part 7b is extracted from the opening part 332 of the rotor 31 on the opposite side (Z2 direction side, rear side) from the side where the coupling part 8 is disposed. At this time, the bearing portion 51 firmly fitted to the rotating shaft portion 7b is moved rearward (Z2 direction) through the opening 332 of the rotor 31 together with the rotating shaft portion 7b. Further, the rear bearing cover 512 pressed against the bearing 51 when the bearing 51 moves and the stat bolt 63 fixed to the rear bearing cover 512 also have the opening 332 together with the rotating shaft 7 b and the bearing 51. To move backward (Z2 direction). Thus, the bearing 51 can be extracted and replaced together with the rotating shaft 7b, the rear bearing cover 512 and the stat bolt 63 through the opening 332 of the rotor 31 in a state where the stator core 22 and the rotor core 32 face each other. Is possible.

  In the first embodiment, as described above, by separating the rotary shaft portion 7b from the rotor 31, the bearing portion 51 is configured to be replaceable in a state where the rotor core 32 and the stator core 22 face each other. Can be exchanged while the rotor shaft 32 b is separated from the rotor 31 and the rotor core 32 and the stator core 22 face each other, so that the rotor 31 having a large outer diameter can be generated. The bearing 51 can be exchanged without being removed from the machine 1. Thereby, when the bearing part 51 is replaced, the bearing part 51 can be easily replaced as compared with the case where it is necessary to remove the rotor 31 having a large outer diameter together with the bearing part 51 from the generator 1. it can. In particular, the generator 1 according to the first embodiment used in the wind power generator 100 has a large weight of the rotor 31, and therefore the present invention in which the rotor 31 does not need to be removed from the generator 1 when the bearing portion 51 is replaced is effective. .

  Moreover, in 1st Embodiment, while providing the opening part 332 in which the rotating shaft part 7b is inserted in the rotor 31 as mentioned above, the rotor core 32 and the stator core 22 are separated by separating the rotating shaft part 7b from the rotor 31. The bearing portion 51 is configured to be exchanged through the opening 332 of the rotor 31 in a state of facing each other. Thus, even in a state where the rotor core 32 and the stator core 22 face each other, the bearing portion 51 is easily moved from one side (Z1 direction side) to the other side (Z2 direction side) of the rotor 31 through the opening 332 of the rotor 31. Since it can be moved, the bearing part 51 can be replaced more easily.

  In the first embodiment, as described above, when the rotary shaft portion 7b is separated from the rotor 31 and extracted from the opening 332 of the rotor 31, the rotor core 32 and the stator core are moved together with the rotary shaft portion 7b. The bearing portion 51 is configured such that the bearings 22 are exchanged through the opening portion 332 of the rotor 31 in a state of facing each other. As a result, the bearing portion 51 can be easily moved from the one side (Z1 direction side) of the rotor 31 to the other side (Z2 direction side) together with the rotation shaft portion 7b simply by removing the rotation shaft portion 7b from the opening 332 of the rotor 31. Since it is moved, the bearing part 51 can be replaced more easily.

  In the first embodiment, as described above, the frame 11 to which the stator 21 is fixedly mounted and the rear bearing cover 512 for fixing the bearing portion 51 to the frame 11 are provided. The opening 332 of the rotor 31 is formed so as to have an inner diameter larger than the maximum radial length of the rear bearing cover 512. As a result, the opening 332 of the rotor 31 is formed in a shape that can pass through the rear bearing cover 512, so that the rear bearing cover 512 together with the bearing 51 is combined with the one side ( It can be moved from the Z1 direction side to the other side (Z2 direction side), and as a result, the bearing portion 51 can be replaced more easily.

  In the first embodiment, as described above, the rear bearing cover 512 is formed in an annular shape so as to surround the rotating shaft portion 7b, and the opening 332 of the rotor 31 is formed with the outer diameter of the rear bearing cover 512. The inner diameter D1 is larger than D2. Accordingly, the rear bearing cover 512 formed in an annular shape can be easily moved from one side (Z1 direction side) to the other side (Z2 direction side) of the rotor 31 through the opening 332. Even when the bearing cover 512 is formed in an annular shape, the bearing portion 51 can be replaced more easily.

  Moreover, in 1st Embodiment, the bearing part 51 is comprised so that the rotating shaft part 7b may be rotatably supported in the cantilever shape as mentioned above. Thus, even if the bearing unit 51 is the generator 1 configured to support the rotating shaft portion 7b in a cantilever manner, the bearing unit 51 can be replaced without removing the rotor 31 from the generator 1. The bearing portion 51 of the generator 1 in which the shaft portion 7b is supported in a cantilever manner can be easily replaced.

  In the first embodiment, as described above, the frame 11 to which the stator 21 is fixedly provided is provided, and the rotor 31 is fixed in a state where the rotor 31 is fixed so as to restrict the movement of the rotor 31 with respect to the frame 11. By separating the rotary shaft portion 7b from the bearing portion 51, the bearing portion 51 is configured such that the rotor core 32 and the stator core 22 are exchanged in a state of facing each other. Thereby, even when the rotating shaft portion 7b is separated from the rotor 31, the rotor 31 is fixed so as to restrict the movement of the rotor 31 with respect to the frame 11, so that the rotor core 32 and the stator core 22 are reliably opposed to each other. The state can be maintained. As a result, it is possible to suppress the rotor core 32 and the stator core 22 from being attracted to each other and colliding with each other when the rotating shaft portion 7b is replaced.

  Further, in the first embodiment, as described above, the rotor fixing portion 15 for fixing the rotor 31 is provided in the frame 11, and the rotor 31 is rotated from the rotor 31 with the bolts 65 fixed to the rotor fixing portion 15. By separating the shaft portion 7b, the bearing portion 51 is configured so that the rotor core 32 and the stator core 22 are exchanged while facing each other. As a result, even when the rotating shaft portion 7b is separated from the rotor 31, the rotor core 32 and the stator core 22 are easily maintained in a state of facing each other with a simple configuration in which the rotor 31 is fixed to the rotor fixing portion 15 with the bolt 65. Therefore, it is possible to easily suppress the rotor core 32 and the stator core 22 from being attracted to each other and colliding with each other when the rotating shaft portion 7b is replaced. Further, unlike the case where the rotor 31 is fixed to the frame 11 using a jig member or the like, it is not necessary to prepare a dedicated jig member when replacing the rotating shaft portion 7b.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. In the second embodiment, when the bearing 51 is replaced, unlike the first embodiment in which the rotor 31 is fixed to the rotor fixing portion 15 by the bolt 65, when the bearing 51 is replaced, A configuration in which the rotor 31 is fixed by connecting the frame 11 with the jig member 210 will be described. Note that in the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  The rotor core 32 of the generator 201 according to the second embodiment is provided with a plurality of screw holes 321. The screw hole 321 is formed on the rear side (Z2 direction side) surface of the rotor core 32, and is configured to be able to screw a bolt 261 described later. Unlike the generator 1 according to the first embodiment, the generator 201 according to the second embodiment is not provided with the rotor fixing portion 15 and is not formed with the screw insertion hole 331 in the rotor 31.

  Next, with reference to FIGS. 7-9, the replacement | exchange procedure of the bearing part 51 of the generator 201 by 2nd Embodiment is demonstrated.

  First, as shown in FIG. 7, the nut 64 fastened to the stat bolt 63 is removed from the completed state of the generator 201 with the bearing portion 51 attached to the frame 11 as shown in FIG. The bolt 62 that connects the portion 7b and the rotor 31 to each other is removed. In the second embodiment, the rotor 31 and the frame 11 are connected and fixed by the jig member 210. Specifically, the bolt 261 is screwed into the screw hole 321 of the rotor core 32 through the screw insertion hole 210 a of the jig member 210. Further, the bolt 262 is screwed into the screw hole 121 of the side surface portion 12 of the frame 11 through the screw insertion hole 210 b of the jig member 210. Then, by tightening the bolts 261 and 262, the frame 11 and the rotor core 32 are coupled and fixed so as to restrict the movement of the rotor 31 with respect to the frame 11. As a result, the rotor 31 is fixed to the frame 11 with the stator core 22 and the rotor core 32 facing each other.

  Then, as shown in FIG. 9, the rotating shaft part 7b is extracted from the opening part 332 of the rotor 31 on the opposite side (Z2 direction side, rear side) from the side where the coupling part 8 is disposed. At this time, the bearing 51, the rear bearing cover 512, and the stat bolt 63 are also moved rearward (Z2 direction) through the opening 332 of the rotor 31 together with the rotating shaft 7 b. Thus, the bearing 51 can be extracted and replaced together with the rotating shaft 7b, the rear bearing cover 512 and the stat bolt 63 through the opening 332 of the rotor 31 in a state where the stator core 22 and the rotor core 32 face each other. Is possible.

  In addition, the other structure of 2nd Embodiment is the same as that of the said 1st Embodiment.

  In the second embodiment, as described above, the rotor core 32 and the stator core 22 face each other by separating the rotary shaft portion 7b from the rotor 31 in a state where the rotor 31 is fixedly connected to the frame 11 by the jig member 210. The bearing portion 51 is configured to be replaced in a state. Even in the configuration of the second embodiment as described above, since the bearing portion 51 can be replaced without removing the rotor 31 having a large outer diameter from the generator 1, the bearing portion 51 can be easily replaced. Further, unlike the case of fixing the rotor 31 to the rotor fixing portion 15 with the bolt 65 as in the first embodiment, it is not necessary to provide the rotor fixing portion 15 on the frame 11 and screw insertion into which the bolt 65 is inserted. Since it is not necessary to provide a space for the hole 331 in the rotor 31, it is possible to suppress an increase in the weight of the frame 11 and the rotor 31, and as a result, it is possible to reduce the weight of the generator 1 as a whole. it can.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first and second embodiments, the example in which the rotating electrical machine (generator) of the present invention is applied to a wind power generator has been described, but the present invention is not limited thereto. You may apply the rotary electric machine (generator) of this invention to power generators other than a wind power generator, such as a hydroelectric power generator, for example.

  Moreover, in the said 1st and 2nd embodiment, although the example which applies the rotary electric machine of this invention to a generator was shown, this invention is not limited to this. You may apply the rotary electric machine of this invention to a motor.

  Moreover, in the said 1st and 2nd embodiment, although the example which forms the back side bearing cover as an attachment member of this invention in an annular | circular shape was shown, this invention is not limited to this. In the present invention, if the maximum length in the radial direction of the mounting member is smaller than the opening of the rotor, the mounting member may be partially disposed only at a position corresponding to the stat bolt.

  In the first embodiment, when the rotor is fixed to the rotor fixing portion, the bolt is connected via the screw insertion hole 331 different from the screw hole 333a into which the bolt 62 that connects the rotor and the rotating shaft portion is screwed together. Although the example of the structure fixed by 65 was shown, this invention is not limited to this. In the present invention, for example, when the rotor 31 is fixed to the rotor fixing portion 15, as shown in FIGS. 10 and 11, a screw hole 333c into which a bolt 361 for connecting the rotor 31 and the rotary shaft portion 7b to each other is screwed. It may be configured to be fixed by a bolt 362 (see FIG. 11) via

  Specifically, a screw insertion hole 307d having a diameter through which a bolt 362 for fixing the rotor 31 to the rotor fixing portion 15 can be passed is formed in the flange portion 7c of the rotating shaft portion 7b. A concave counterbore hole 333b having a diameter substantially the same as that of the screw insertion hole 307d is formed in a portion corresponding to the screw insertion hole 307d of the rotor body 33. The counterbore hole 333b has a depth capable of accommodating the head of the bolt 362. The rotor body 33 has a screw hole 333c extending forward (Z1 direction) from the counterbore hole 333b. The screw hole 333c penetrates the rotor body 33 in the axial direction (Z direction) and is configured to be screwable with the bolt 361. As shown in FIG. 10, the rotary shaft portion 7b is configured to be separably attached to the rotor 31 by screwing a bolt 361 inserted into the screw insertion hole 307d into the screw hole 333c. The screw hole 333c has a diameter smaller than the head of the bolt 362 and larger than the trunk. A screw hole 152 that can be screwed into the bolt 362 is formed in a portion corresponding to the screw hole 333 c of the rotor fixing portion 15. Moreover, the bolt 362 for fixing the rotor 31 to the rotor fixing | fixed part 15 consists of a hexagon socket head cap screw which has a hexagon socket in a head.

  Next, with reference to FIG. 10 and FIG. 11, the exchange procedure of the bearing part 51 of the generator 301 by the modification of 1st Embodiment is demonstrated. First, similarly to the first embodiment, after removing the bolt 61 and removing the cover 41, the nut 64 fastened to the stat bolt 63 is removed, and the bolt 361 for connecting the rotary shaft portion 7b and the rotor 31 to each other. Remove. Thereafter, in the modification of the first embodiment, the bolt 362 is inserted into the screw hole 333 c of the rotor 31 through the screw insertion hole 307 d of the rotating shaft portion 7 b. Then, as shown in FIG. 11, the bolt 362 is screwed into the screw hole 152 of the rotor fixing portion 15, and the head of the bolt 362 is stored in the counterbore hole 333b. Thereby, the rotor 31 is fixed to the rotor fixing portion 15. In this state, the rotating shaft part 7b is extracted from the opening part 332 of the rotor 31 on the side opposite to the side where the coupling part 8 is disposed (Z2 direction side, rear side). At this time, the bearing 51, the rear bearing cover 512, and the stat bolt 63 are also moved rearward (Z2 direction) through the opening 332 of the rotor 31 together with the rotating shaft 7 b. Thus, the bearing 51 can be extracted and replaced together with the rotating shaft 7b, the rear bearing cover 512 and the stat bolt 63 through the opening 332 of the rotor 31 in a state where the stator core 22 and the rotor core 32 face each other. Is possible.

  In this case, a bolt 362 for fixing the rotor 31 to the rotor fixing portion 15 can be inserted by diverting the screw hole 333c into which the bolt 361 for connecting the rotor 31 and the rotating shaft portion 7b to each other is screwed. Therefore, it is not necessary to provide the screw insertion holes for the bolts 361 and 362 separately.

1,201,301 Generator (Rotating electric machine)
5 Blade 7b Rotating shaft portion 11 Frame 15 Rotor fixing portion 21 Stator 22 Stator core 31 Rotor 32 Rotor core 51 Bearing portion (Rotating shaft support portion)
65 bolts (fastening members)
100 Wind Power Generator 210 Jig Member 332 Opening 512 Rear Bearing Cover (Mounting Member)

Claims (10)

A rotating shaft,
A rotor including a rotor core and separably attached to the rotating shaft;
A stator including a stator core disposed to face the rotor core in the radial direction;
A rotation shaft support portion that rotatably supports the rotation shaft portion,
A rotating electrical machine configured to be able to exchange the rotating shaft support portion in a state where the rotor core and the stator core face each other by separating the rotating shaft portion from the rotor. The rotor has an opening into which the rotating shaft is inserted;
The rotary shaft support portion is configured to be exchanged through an opening of the rotor in a state where the rotor core and the stator core face each other by separating the rotary shaft portion from the rotor. Item 2. The rotating electrical machine according to Item 1.   The rotating shaft support portion is moved with the rotating shaft portion when the rotating shaft portion is separated from the rotor and extracted from the opening of the rotor, so that the rotor core and the stator core face each other. The rotating electrical machine according to claim 2, wherein the rotating electrical machine is configured to be exchanged through an opening of the rotor. A frame to which the stator is fixedly attached;
An attachment member for fixedly attaching the rotating shaft support to the frame;
4. The rotating electrical machine according to claim 2, wherein the opening of the rotor has an inner diameter larger than a maximum length in a radial direction of the mounting member. The mounting member is formed in an annular shape so as to surround the rotating shaft portion,
The rotating electrical machine according to claim 4, wherein the opening of the rotor has an inner diameter larger than an outer diameter of the mounting member.   The rotary electric machine according to any one of claims 1 to 5, wherein the rotary shaft support portion is configured to support the rotary shaft portion in a cantilevered manner. A frame to which the stator is fixedly attached;
The rotor shaft and the stator core face each other by separating the rotary shaft portion from the rotor in a state where the rotor is fixed so as to restrict the movement of the rotor with respect to the frame. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is configured to be exchanged in a state.   The rotating shaft support portion is replaced with the rotor core and the stator core facing each other by separating the rotating shaft portion from the rotor in a state where the rotor is fixedly connected to the frame by a jig member. The rotating electrical machine according to claim 7, configured as described above. The frame includes a rotor fixing portion for fixing the rotor;
The rotating shaft support portion is exchanged in a state where the rotor core and the stator core face each other by separating the rotating shaft portion from the rotor in a state where the rotor is fixed to the rotor fixing portion by a fastening member. The rotating electrical machine according to claim 7, which is configured as follows. A generator including a rotating shaft portion;
A blade connected to the rotating shaft portion of the generator,
The generator is
A rotor having a rotor core and separably attached to the rotating shaft;
A stator having a stator core disposed to face the rotor core in the radial direction;
A rotation shaft support portion that rotatably supports the rotation shaft portion;
A wind turbine generator configured to be able to exchange the rotating shaft support portion in a state where the rotor core and the stator core face each other by separating the rotating shaft portion from the rotor.

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