JP2018098854A - Stator, rotary electric machine, and method for assembling stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator capable of improving the workability of assembling work while positional displacement of an inner frame is prevented, and provide a rotary electric machine having the stator.SOLUTION: A stator 20 comprises: an outer frame 30 which includes a first lower wall part 31 having an annular first recessed portion 35 formed on an upper surface 31a thereof, a first support member 33, and a first upper wall part 34 provided to the first support member 33; an inner frame 40 which includes a second lower wall part 41 fixed into the first recessed portion 35 and having a first space S1 formed relative to an inner peripheral surface 35a of the first recessed portion 35, a second support member 43, and an annular second upper wall part 44 provided to the second support member 43 so as to be disposed inside the first upper wall part 34 and having a second space S2 formed relative to an inner peripheral surface 34b of the first upper wall part 34; and a first spacer 51 which is disposed in the first space S1.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a stator having an outer frame and an inner frame, a rotating electric machine having the stator, and a method for assembling the stator.

  As a rotary electric machine, a vertical water turbine generator is known in which a rotor and a stator are arranged in a posture in which the axis is parallel to the vertical direction, and the rotor is rotated by a water turbine. In such a stator of a vertical water turbine generator, a stator winding impregnated with a stator core and an insulating material is fixed to a frame having an annular plate constituting an upper end portion and a lower end portion. Moreover, this frame is known to have a structure having an outer frame constituting a radially outer portion and an inner frame fixed in the outer frame (see, for example, Patent Document 1).

  In addition, in order to improve the cooling performance of the stator winding, the insulating material is not impregnated only in the stator winding but in the integrated body of the inner frame, the stator core, and the stator winding. Impregnation is performed. By impregnating this integral with an insulating material, the insulating material is interposed between the stator winding and the stator core, and the heat generated in the stator winding is conducted to the stator core by the insulating material. The child winding is efficiently cooled.

  The integrated structure of the inner frame, the stator iron core, and the stator winding configured as described above is fixed to the outer frame in, for example, a building serving as a place where the generator is installed. Specifically, the upper wall portion of the inner frame is fitted into the upper wall portion of the outer frame, and the lower wall portion of the inner frame is engaged with the lower wall portion of the outer frame by a so-called stamp structure. And these upper wall parts and lower wall parts are fixed by welding.

Japanese Utility Model Publication No.59-30591

  The above-described stator having the outer frame and the inner frame has the following problems. That is, it is difficult to completely remove the insulating material adhering to the upper and lower walls of the inner frame, and the remaining insulating material makes it difficult to insert the inner frame into the outer frame. There is a problem of poor workability.

  In order to solve this problem, the gap between the upper wall portion of the inner frame and the upper wall portion of the outer frame is increased, and the gap between the lower wall portion of the inner frame and the lower wall portion of the outer frame is increased. Although it is conceivable, there is a possibility that the position of the inner frame is shifted when the inner frame is welded to the outer frame by increasing the gap.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stator capable of improving the workability of assembling work while preventing displacement of the inner frame, and a rotating electrical machine having the stator.

In order to solve the above problems and achieve the object, the stator and the rotating electric machine of the present invention are configured as follows.
As one aspect of the present invention, the stator is formed in an annular shape, and a first lower wall portion in which an annular first recess is formed in a range from the inner peripheral surface to the midway portion in the radial direction of the upper surface, A first support part provided on the upper surface, an outer frame formed in an annular shape and having a first upper wall part supported by the first support part, and placed in the first recess part An annular second lower wall portion having a first gap between the inner surface of the first recess portion, a second support portion provided on the upper surface of the second lower wall portion, An inner frame having an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion, and disposed in the first gap; A first spacer in contact with the lower wall portion and the second lower wall portion.

  As one aspect of the present invention, the rotating electrical machine is formed in an annular shape, and a first lower wall portion in which an annular first recess is formed in a range of a midway portion in the radial direction from the inner peripheral surface to the upper surface, A first support part provided on the upper surface, an outer frame formed in an annular shape and having a first upper wall part supported by the first support part, and placed in the first recess part An annular second lower wall portion having a first gap between the inner surface of the first recess portion, a second support portion provided on the upper surface of the second lower wall portion, An inner frame having an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion, and disposed in the first gap; And a first spacer that contacts the lower wall portion and the second lower wall portion, and a rotor disposed inside the stator.

  As one aspect of the present invention, the stator assembling method includes a first lower part that is formed in an annular shape and in which an annular first recess is formed in a range from the inner peripheral surface to the middle part in the radial direction of the upper surface. A wall portion, a first support portion provided on the upper surface, and an outer frame formed in an annular shape and having a first upper wall portion supported by the first support portion are fixed to an installation place, and are annular The second lower wall portion, the second support portion provided on the upper surface of the second lower wall portion, and supported by the second support portion and disposed inside the first upper wall portion. An inner frame having an annular second upper wall portion is inserted into the outer frame through the inside of the first upper wall portion, and the second lower wall portion is inserted into the first recess portion from above. And adjusting the position of the inner frame so as to be coaxial with the outer frame, and the inner peripheral surface of the first recess and the second bottom A first spacer is installed in a first gap between the outer peripheral surface of the first portion to fix the inner frame to the outer frame in a radial direction, and the upper surface of the first recess and the second lower wall portion Weld the bottom surface of

  It is possible to provide a stator capable of improving the workability of assembling work while preventing the displacement of the inner frame, a rotating electric machine having the stator, and a method for assembling the stator.

Sectional drawing which shows the principal part structure of the generator which concerns on one Embodiment of this invention. Sectional drawing which shows the principal part of the stator used for the generator. Sectional drawing which shows the principal part of the same stator. The top view which shows the same stator. Sectional drawing which shows the circumferential direction end of the outer frame structure part of the stator. The top view which shows the principal part of the same stator.

  A generator 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a cross-sectional view showing a main configuration of the generator 10. FIG. 2 is a cross-sectional view showing a main part of the stator 20 of the generator 10. FIG. 3 is a cross-sectional view showing a main part of the stator 20. Specifically, FIG. 3 shows the first gap S1 and the vicinity thereof. FIG. 4 is a plan view showing the stator 20. FIG. 5 is a cross-sectional view showing one circumferential end of the outer frame constituting portion 37 of the stator 20. FIG. 6 is a plan view showing a main part of the stator 20. Specifically, FIG. 6 shows the first gap S1 and the vicinity thereof.

  The generator 10 is an example of a rotating electrical machine. As shown in FIG. 1, the generator 10 is a vertical water turbine generator in which, for example, the axes of the stator 20 and the rotor 60 are arranged in a posture parallel to the vertical direction V, and the rotor 60 is rotated by a water turbine. It is. The vertical direction V is set with the direction in which gravity acts as the downward direction. The generator 10 is driven by a stator 20 fixed to the installation place 1 where the generator 10 is installed, a rotor 60 disposed in the stator 20, a rotating shaft 70 fixed to the rotor 60, and hydraulic power. Thus, a water wheel that rotates the rotary shaft 70 is provided. A center line C is set at the installation location 1 where the generator 10 is installed. In the manufacturing process, the generator 10 is installed at a position where the axis of the stator 20 is coaxial with the center line C, and is installed at a position where the axis of the rotor 60 is coaxial with the center line C. The center line C is parallel to the vertical direction V.

  As shown in FIG. 2, the stator 20 is fixed to the frame 21 having the lower wall portion 21 a and the upper wall portion 21 b, the annular stator core 23 fixed to the frame 21, and the stator core 23. A plurality of stator windings 24 are provided.

  Specifically, the frame 21 includes an outer frame 30 that forms a portion from the outer edge to the middle portion in the radial direction, an inner frame 40 that forms a portion from the middle portion in the radial direction to the inner edge, and the outer frame 30 and A plurality of first spacers 51 and a plurality of second spacers 58 are disposed between the inner frames 40.

  The outer frame 30 has an annular first lower wall portion 31 constituting a part of the lower wall portion 21a, a plurality of first support members 33 fixed to the upper surface 31a of the first lower wall portion 31, and a plurality of The first support member 33 has an annular first upper wall portion 34 which is fixed to the upper end of the first support member 33 and constitutes a part of the upper wall portion 21b.

  The first lower wall portion 31 constitutes the lower wall portion of the outer frame 30. The first lower wall portion 31 is formed in an annular plate shape. The first lower wall portion 31 is fixed at the position of the installation place 1 whose axis is coaxial with the center line C. As shown in FIG. 3, an annular first recess 35 having a rectangular cross section is formed on the upper surface 31 a of the first lower wall portion 31 in a range from the inner peripheral surface 31 b to the midway portion in the radial direction. Yes.

  In the present embodiment, the first recess 35 is formed on the inner peripheral portion of the upper surface 31a. The inner peripheral surface 35 a of the first recess 35 is smaller in diameter than the outer diameter of the first lower wall portion 31. The inner diameter of the first recess 35 is the diameter of the inner peripheral surface 35a. The first lower wall portion 31 is formed, for example, by fixing a pair of semi-annular first lower wall portion constituting members 32 via a plate member 38 described later.

  The plurality of first support members 33 are fixed side by side in the circumferential direction at a portion radially outward from the first recess 35 of the upper surface 31a. The plurality of first support members 33 extend in the axial direction.

  The first upper wall portion 34 is fixed to the upper ends of the plurality of first support members 33. The first upper wall portion 34 is formed in an annular plate shape. The first upper wall portion 34 constitutes an upper wall portion by being fixed to the plurality of first support members 33. The first upper wall portion 34 is arranged coaxially with the first lower wall portion 31. The first upper wall portion 34 is formed, for example, by fixing a pair of semi-annular first upper wall portion constituting members 34a via a plate member 38 described later.

  As shown in FIG. 5, the plate member 38 is formed in a plate shape extending from one circumferential end of the first upper wall constituting member 34 a to the upper surface of the first lower wall constituting member 32. The upper wall constituting member 34 a is fixed to one end in the circumferential direction and the first support member 33. The plate member 38 is disposed on the radially outer side of the first recess 35. The plate member 38 has a plurality of holes 39 penetrating the plate member 38. The hole 39 is formed so that a bolt can be arranged. The pair of outer frame components 37 are fastened and fixed by a bolt disposed in the hole 39 and a nut screwed into the bolt.

  In this way, the outer frame constituting portion 37 is formed by an integral body having the first lower wall constituting member 32 and the first upper wall constituting member 34a. The outer frame 30 is configured by a pair of outer frame constituting portions 37 being fixed by the bolts through holes 39 of a pair of plate members 38 that are opposed to each other. At this time, the circumferential end surfaces of the pair of first lower wall portion constituting members 32 are in contact with each other. In the present embodiment, the first lower wall portion 31 is formed in an annular shape by connecting a pair of first lower wall portion constituting members 32 via a plate member 38. However, the first lower wall portion 31 is not limited to being configured by combining a plurality of members like the pair of first lower wall portion constituting members 32. In another example, the first lower wall portion 31 may be formed from one annular member. The first upper wall portion 34 is formed in an annular shape by connecting a pair of first upper wall portion constituting members 34 a via a plate member 38. However, the first upper wall portion 34 is not limited to being configured by combining a plurality of members such as the pair of first upper wall portion constituting members 34 a and the plate member 38. In another example, the first upper wall portion 34 may be formed from one annular member.

  As shown in FIG. 2, the inner frame 40 has a plurality of second lower walls 41 that are fixed to an annular second lower wall 41 that constitutes a part of the lower wall 21 a and an upper surface 42 of the second lower wall 41. The upper support member 43 and the second support member 43 have an annular second upper wall portion 44 that is fixed to the upper ends of the second support member 43 and constitutes a part of the upper wall portion 21b.

  The second lower wall portion 41 constitutes a lower end wall portion of the inner frame 40. The second lower wall portion 41 is formed in an annular plate shape that is thicker than, for example, the first lower wall portion 31. The thickness of the second lower wall portion 41 is not limited to being thicker than the thickness of the first lower wall portion 31. The second lower wall portion 41 has its axis centered coaxially with the center line C. As shown in FIG. 3, the outer diameter of the second lower wall portion 41 is larger than the inner diameter of the first lower wall portion 31 and smaller than the inner diameter of the first recess portion 35. The second lower wall portion 41 and the first lower wall portion 31 are a first portion in which a first spacer 51 can be disposed between the outer peripheral surface 41a and the inner peripheral surface 35a of the second lower wall portion 41. There is a gap S1.

  The outer diameter of the second lower wall portion 41 and the inner diameter of the first recess portion 35 are described later attached to the inner frame 40 when the second lower wall portion 41 is placed on the first recess portion 35. The insulating material is set to a diameter that does not interfere with the ridge between the inner circumferential surface 35a of the first recess 35 and the radially outer portion of the upper surface 31a. .

  Mounted on a part of the upper surface 36 of the first recess 35 in the range from the outer peripheral surface 41a of the second lower wall portion 41 to the midway portion in the radial direction of the lower surface 45 of the second lower wall portion 41. A second recess 46 having a rectangular cross section is formed. The second recessed portion 46 is formed coaxially with the second lower wall portion 41. The 2nd dent part 46 is formed in the outer peripheral part of the lower surface 45, for example. The outer diameter of the outer peripheral surface 46 a of the second recessed portion 46 is smaller than the inner diameter of the first lower wall portion 31. The outer diameter of the second recess 46 is the diameter of the outer peripheral surface 46a.

  The outer peripheral surface 46 a of the second recess 46 has a gap S <b> 3 between it and the inner peripheral surface 31 b of the first lower wall portion 31. The outer peripheral surface 46a has a smaller diameter than the outer peripheral surface 41a. The outer diameter of the second recessed portion 46 and the inner diameter of the first lower wall portion 31 are set such that the second lower wall portion 41 is placed when the second lower wall portion 41 is placed on the first recessed portion 35. An insulating material, which will be described later, attached to the first and second recesses 35 is set to a diameter that does not interfere with a ridge between the upper surface 36 of the first recess 35 and the inner peripheral surface 31b of the first lower wall 31. The lower surface 47 is fixed to the upper surface 36 of the first recess 35 by welding.

  As shown in FIG. 2, the second support member 43 extends in the axial direction. The second support member 43 can support the second upper wall portion 44 on the second lower wall portion 41, and is formed so that the stator core 23 can be fixed. Specifically, a plurality of second support members 43 are fixed to the upper surface 42 of the second lower wall portion 41 so as to be spaced apart at equal intervals in the circumferential direction. A stator core 23 is disposed inside the plurality of second support members 43. That is, the stator core 23 is fixed by the radially inner ends of the plurality of second support members 43 coming into contact with the outer peripheral surface of the annularly formed stator core 23. In addition to the second support member 43, another support portion that can fix the stator core 23 may be formed.

  The second upper wall portion 44 is fixed to the upper ends of the plurality of second support members 43. The second upper wall portion 44 is formed in an annular plate shape that is thicker than, for example, the first upper wall portion 34. The second upper wall portion 44 is not limited to being thicker than the first upper wall portion 34. The second upper wall portion 44 constitutes the upper wall portion of the inner frame 40 by being fixed to the plurality of second support members 43.

  The second upper wall portion 44 is disposed coaxially with the second lower wall portion 41. The outer diameter of the second upper wall portion 44 is smaller than the inner diameter of the first upper wall portion 34. The outer peripheral surface 44a of the second upper wall portion 44 and the inner peripheral surface 34b of the first upper wall portion 34 have a second gap S2 between which the second spacer 58 can be disposed. The inner diameter of the first upper wall portion 34 and the outer diameter of the second upper wall portion 44 are determined so that the insulating material attached to the inner frame 40 when the inner frame 40 is inserted into the outer frame 30 The diameter is set so as not to interfere with the ridge between the inner peripheral surface 34 b of the portion 34 and the upper surface 34 c of the first upper wall portion 34.

The plurality of first spacers 51 are disposed in the first gap S1. The plurality of first spacers 51 are spaced apart in the circumferential direction. The plurality of first spacers 51 are, for example, rectangular parallelepiped blocks, as shown in FIG. The plurality of first spacers 51 come into contact with the inner peripheral surface 35a of the first recess 35 and the outer peripheral surface 41a of the second lower wall portion 41 so that the second lower wall portion 41 is centered on the center line C. As shown in FIGS. 3 and 6, the plurality of first spacers 51 formed so as to be radially fixed at positions coaxial with each other include a bottom surface 52, a top surface 56, and an inner peripheral surface 35a when installed. An outer surface 53 that faces the outer peripheral surface 41 a when installed, and a pair of side surfaces 55 that are continuous with the outer surface 53 and the upper surface 56. In the plurality of first spacers 51, the bottom surface 52 is placed on the upper surface 36 of the first recess 35, and the ridge 57 between the outer surface 53 and the side surface 55 is the inner peripheral surface 35 a of the first recess 35. The inner surface 54 is in contact with the outer peripheral surface 41 a of the second lower wall portion 41.

  The plurality of second spacers 58 are arranged in the second gap S2, as shown in FIG. The second spacer 58 is a wedge that can be inserted into the second gap S2 from above. Since the plurality of second spacers 58 are inserted into the second gap S2, the second upper wall portion 44 is fitted inside the first upper wall portion 34 via the second spacer 58. The first upper wall portion 34 and the second upper wall portion 44 are fixed.

  The second spacer 58 has a curved surface 58a that faces the inner peripheral surface 34b and a curved surface 58b that contacts the outer peripheral surface 44a. The cross section of the second spacer 58 is formed in a triangular shape in which the length between the curved surface 58a and the curved surface 58b decreases toward the tip. The curved surface 58a is formed as a curved surface along the inner peripheral surface 34b. Specifically, the curved surface 58a has a radius of curvature at one end where the length between the curved surface 58b and the curved surface 58b is the longest is larger than the curvature radius of the inner peripheral surface 34b, and the length between the curved surface 58b and the curved surface 58b is the smallest. The radius of curvature at the end is formed so that the radius of curvature of the inner peripheral surface 34b is also small. Further, the curvature radius of the other end of the curved surface 58a having the smallest length between the curved surface 58b is the same as or slightly larger than the curvature radius of the curved surface 58b. The center of curvature of the curved surface 58a is coaxial with the center of curvature of the inner peripheral surface 34b when the second spacer 58 is installed in the second gap S2. The radius of curvature of the curved surface 58a gradually decreases from one end to the other end. The curved surface 58a formed in this way contacts the ridge between the inner peripheral surface 34b and the upper surface 34c of the first upper wall portion 34.

  The curved surface 58b is formed as a curved surface along the outer peripheral surface 44a. Specifically, the curved surface 58b has a radius of curvature that is the same as or slightly larger than the radius of curvature of the outer peripheral surface 44a. The curved surface 58b formed in this manner is in surface contact with the outer peripheral surface 44a. Note that the center of curvature of the curved surface 58b is coaxial with the curved surface 58a, and when the second spacer 58 is installed in the second gap S2, it is coaxial with the outer peripheral surface 44a. The curved surface 58a and the curved surface 58b of the second spacer 58 are not limited to being formed as described above. In another example, the curved surface 58a and the curved surface 58b may be formed as curved surfaces having the same radius of curvature and having the center of curvature as the same axis. In this case, the curvature radii of the curved surface 58a and the curved surface 58b may be the same as or slightly larger than the diameter of the outer peripheral surface 44a. Alternatively, the second spacer 58 may be formed in a wedge shape in which the surface facing the inner peripheral surface 34b and the surface facing the outer peripheral surface 44a are flat.

  The stator core 23 is arranged inside a plurality of second support members 43 arranged in the circumferential direction of the inner frame 40 and is fixed by the plurality of second support members 43. The stator core 23 has, for example, a structure in which a plurality of stacked iron core plates are sandwiched between a pair of presser plates. In the present embodiment, a presser plate 23 a that supports the upper end of the stator core 23 and a second lower wall portion 41 that supports the lower end of the stator core 23 are used as the pair of presser plates. That is, the second lower wall portion 41 is also used as a press plate. The stator winding 24 is fixed to the stator core 23 as shown in FIG. The stator winding 24 is configured to generate an alternating current by the rotation of the rotor 60.

  As shown in FIG. 1, the rotor 60 has an axis centered coaxially with the center line C. The rotating shaft 70 is disposed coaxially with the rotor 60. As the rotating shaft 70 rotates, the rotor 60 rotates integrally.

An example of the conveyance of the stator 20 configured as described above to the installation location and an example of the assembly operation of the stator 20 will be described.
The stator 20 is transported to the installation location in a state where the integrated body of the inner frame 40, the stator core 23, and the stator winding 24 is separated from the outer frame 30. The outer frame 30 is transported to the installation place 1 in a state where the outer frame constituting unit 37 is separated.

  The inner frame 40, the stator core 23, and the stator winding 24 are transported after being assembled together at the factory and impregnated with an insulating material such as varnish. Specifically, the stator winding 24 is fixed to the stator core 23, and the integrated body of the stator core 23 and the stator winding 24 is fixed between the second support members 43 of the inner frame 40. Then, the inner frame 40, the stator core 23, and the stator winding 24 assembled together are impregnated with an insulating material such as varnish. As an example of means for impregnation, vacuum impregnation is used. When the impregnation operation is completed, a removal operation for removing unnecessary insulating material is performed. The unnecessary insulating material is, for example, an insulating material that does not contribute to the insulation of the stator winding 24 or an insulating material that is not interposed between the stator winding 24 and the stator core 23.

  In the installation place 1, the pair of outer frame components 37 are fastened with bolts and nuts to form the outer frame 30. The outer frame 30 is fixed at a position where its axis coincides with the center line C of the installation location.

  The integrated body of the inner frame 40, the stator core 23, and the stator winding 24 is fixed to the outer frame 30 after the outer frame 30 is fixed to the installation place 1, for example. Specifically, the inner frame 40 is inserted from above through the inside of the first upper wall portion 34 of the outer frame 30 and placed on the first recess 35 of the first lower wall portion 31.

  When the second lower wall portion 41 of the inner frame 40 is placed on the upper surface 36 of the first recess 35, the axis of the inner frame 40 is coaxial with the center line C of the installation location 1. That is, the position of the inner frame 40 is adjusted so as to be coaxial with the outer frame 30. When this adjustment is completed, the plurality of first spacers 51 are installed in the first gap S1. Specifically, the plurality of first spacers 51 are in contact with the inner peripheral surface 35 a of the first recess 35, the upper surface 36 of the first recess 35, and the outer peripheral surface 41 a of the second lower wall portion 41. Let

  By installing the plurality of first spacers 51 as described above, the inner frame 40 is fixed in a radial direction at a position where the axial center is coaxial with the center line C. Next, the second spacer 58 is inserted into the second gap S2. By inserting the second spacer 58 into the second gap S2, the inner frame 40 is fixed to the outer frame 30 in the radial direction at a position where the axis is coaxial with the center line C.

  When the plurality of first spacers 51 and the plurality of second spacers 58 are installed and the inner frame 40 is fixed to the outer frame 30 in the radial direction, the second recess 46 of the second lower wall portion 41 The lower surface 47 is fixed to the upper surface 36 of the first recessed portion 35 of the first lower wall portion 31 by welding. By fixing the second lower wall portion 41 and the first lower wall portion 31, the assembly work of the stator 20 is completed.

  The generator 10 configured as described above has a first gap between the inner peripheral surface 35a of the first recessed portion 35 of the first lower wall portion 31 and the outer peripheral surface 41a of the second lower wall portion 41. S1 and a second gap S2 between the inner peripheral surface 34b of the first upper wall portion 34 and the outer peripheral surface 44a of the second upper wall portion 44, thereby forming the outer peripheral surface 41a and the outer peripheral surface 44a. Even if the insulating material is adhered, the inner frame 40 can be smoothly inserted into the outer frame 30.

  Further, by installing the first spacer 51 and the second spacer 58, it is possible to prevent the position of the inner frame 40 from shifting when the first lower wall portion 31 and the second lower wall portion 41 are welded. . From these things, the generator 10 can improve the workability | operativity of the assembly operation | work of the stator 20, preventing the position of the inner frame 40 shifting.

  Furthermore, since the second spacer 58 is formed in a wedge shape, the second spacer 58 can be attached only by inserting the second spacer 58 into the second gap S2. Workability can be improved.

  In the present embodiment, the first spacer 51 is formed in advance according to the assumed size of the first gap S1, but is not limited thereto. The first spacer 51 may be formed larger than the assumed first gap S1 so that the size of the first spacer 51 can be adjusted. By forming the first spacer 51 large, the first spacer 51 can be adjusted in accordance with the first gap S1, for example, by cutting the ridge 57. Similarly, the second spacer 58 may be formed slightly larger than the assumed second gap S2. The size of the second spacer 58 may also be adjusted by shaving.

  Moreover, although the generator 10 has the 2nd spacer 58, it is not limited to this. When the position shift of the inner frame 40 can be prevented with only the first spacer 51, the second spacer 58 may not be used.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.

  DESCRIPTION OF SYMBOLS 10 ... Generator (rotary electric machine), 20 ... Stator, 21 ... Frame, 21a ... Lower wall part, 21b ... Upper wall part, 23a ... Holding plate, 23 ... Stator iron core, 24 ... Stator winding, 30 ... Outer frame, 31 ... first lower wall portion, 31a ... upper surface, 31b ... inner peripheral surface, 32 ... first lower wall portion constituting member, 33 ... first support member (first support portion), 34 ... 1st upper wall part, 34a ... 1st upper wall part structural member, 34b ... inner peripheral surface, 34c ... upper surface, 35 ... 1st recessed part, 35a ... inner peripheral surface, 36 ... upper surface, 37 ... outer frame Component part, 38 ... Plate member, 39 ... Hole, 40 ... Inner frame, 41 ... Second lower wall part, 41a ... Outer peripheral surface, 42 ... Upper surface, 43 ... Second support member (second support part), 44 ... second upper wall portion, 44a ... outer peripheral surface, 45 ... lower surface, 46 ... second recessed portion, 46a ... outer peripheral surface, 47 ... lower surface, 51 ... first space 52 ... bottom surface, 53 ... outer surface, 54 ... inner surface, 55 ... side surface, 56 ... upper surface, 57 ... ridge, 58 ... second spacer, 58a ... curved surface, 58b ... curved surface, 60 ... rotor, 70 ... rotation Axis, S1 ... first gap, S2 ... second gap, S3 ... third gap, C ... centerline, V ... vertical direction.

In order to solve the above problems and achieve the object, the stator and the rotating electric machine of the present invention are configured as follows.
As one aspect of the present invention, the stator is formed in an annular shape, and a first lower wall portion in which an annular first recess is formed in a range from the inner peripheral surface to the midway portion in the radial direction of the upper surface, A first support part provided on the upper surface, an outer frame formed in an annular shape and having a first upper wall part supported by the first support part, and placed in the first recess part is, the first gap is closed between the inner peripheral surface of the first recess, the second lower wall portion of the annular fixed to the upper surface of the first recess, the second under the An inner frame comprising a second support portion provided on an upper surface of the wall portion, and an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion. And a first spacer disposed in the first gap and in contact with the inner peripheral surface of the first recess and the second lower wall.

As one aspect of the present invention, the rotating electrical machine is formed in an annular shape, and a first lower wall portion in which an annular first recess is formed in a range of a midway portion in the radial direction from the inner peripheral surface to the upper surface, A first support part provided on the upper surface, an outer frame formed in an annular shape and having a first upper wall part supported by the first support part, and placed in the first recess part is, the first gap is closed between the inner peripheral surface of the first recess, the second lower wall portion of the annular fixed to the upper surface of the first recess, the second under the An inner frame comprising a second support portion provided on an upper surface of the wall portion, and an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion. When disposed in the first gap, a first spacer in contact with the inner peripheral surface and the second lower wall portion of the first recess portion, it is fixed to the frame Comprising a stator core, a stator winding which is fixed to the stator core, wherein the frame, the stator core, and, one piece of the stator windings fixed insulating material is impregnated And a rotor disposed inside the stator at a position coaxial with an axis of the stator.

As one aspect of the present invention, the stator assembling method includes a first lower part that is formed in an annular shape and in which an annular first recess is formed in a range from the inner peripheral surface to the middle part in the radial direction of the upper surface. A wall portion, a first support portion provided on the upper surface, and an outer frame formed in an annular shape and having a first upper wall portion supported by the first support portion;
An annular second lower wall portion, a second support portion provided on the upper surface of the second lower wall portion, and supported by the second support portion and disposed inside the first upper wall portion. A stator iron core, a stator winding, and an inner frame , each having an annular second upper wall portion and impregnated with an insulating material, are passed through the inside of the first upper wall portion into the outer frame. The second lower wall portion is placed on the first recess portion from above, and the position of the inner frame is adjusted to be coaxial with the outer frame, and the first recess portion is adjusted. inner to the first gap between the circumferential surface and the outer circumferential surface of the second lower wall portion by installing a first spacer fixing the frame in a radial direction to the outer frame, the first of The upper surface of the recess is welded to the lower surface of the second lower wall.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the embodiments may be appropriately combined as much as possible, and in that case, the combined effect can be obtained. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the column of the effect of the invention Can be obtained as an invention.
The invention described in the initial claims of the present application will be appended below.
[1]
A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame formed in an annular shape and having a first upper wall portion supported by the first support portion;
An annular second lower wall portion that is placed in the first dent portion and has a first gap between the inner peripheral surface of the first dent portion and an upper surface of the second lower wall portion. An inner frame including a second support portion provided, an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion;
A first spacer disposed in the first gap and in contact with the first lower wall portion and the second lower wall portion;
A stator comprising:
[2]
The second upper wall portion has a second gap with the inner peripheral surface of the first upper wall portion,
A second spacer disposed in the second gap and in contact with the first upper wall and the second upper wall;
The stator according to [1].
[3]
A stator core fixed to the inner frame, and a stator winding fixed to the stator core;
[1] The stator according to [1], wherein the integral body of the inner frame, the stator core, and the stator winding is impregnated with an insulating material.
[4]
A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame which is formed in an annular shape and includes a first upper wall portion supported by the first support portion; and an inner periphery of the first recess portion, which is placed on the first recess portion. An annular second lower wall portion having a first gap with the surface, a second support portion provided on an upper surface of the second lower wall portion, and supported by the second support portion, An inner frame having an annular second upper wall portion disposed inside the first upper wall portion; and the first lower wall portion and the second lower wall disposed in the first gap. A first spacer in contact with the part, and a stator comprising:
A rotor disposed inside the stator;
A rotating electrical machine.
[5]
A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame that is formed in an annular shape and includes a first upper wall portion supported by the first support portion, and is fixed to an installation location.
An annular second lower wall portion, a second support portion provided on the upper surface of the second lower wall portion, and supported by the second support portion and disposed inside the first upper wall portion. An inner frame having an annular second upper wall portion is inserted into the outer frame through the inside of the first upper wall portion;
The second lower wall portion is placed on the first recess portion from above,
Adjust the position of the inner frame to be coaxial with the outer frame,
A first spacer is installed in a first gap between the inner peripheral surface of the first recess and the outer peripheral surface of the second lower wall portion to fix the inner frame to the outer frame in the radial direction. And
The upper surface of the first recessed portion and the lower surface of the second lower wall portion are welded.
How to assemble the stator.

Claims (5)

A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame formed in an annular shape and having a first upper wall portion supported by the first support portion;
An annular second lower wall portion that is placed in the first dent portion and has a first gap between the inner peripheral surface of the first dent portion and an upper surface of the second lower wall portion. An inner frame including a second support portion provided, an annular second upper wall portion supported by the second support portion and disposed inside the first upper wall portion;
A first spacer disposed in the first gap and in contact with the first lower wall portion and the second lower wall portion;
A stator comprising: The second upper wall portion has a second gap with the inner peripheral surface of the first upper wall portion,
The stator according to claim 1, further comprising: a second spacer disposed in the second gap and in contact with the first upper wall portion and the second upper wall portion. A stator core fixed to the inner frame, and a stator winding fixed to the stator core;
2. The stator according to claim 1, wherein an integral body of the inner frame, the stator iron core, and the stator winding is impregnated with an insulating material. A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame which is formed in an annular shape and includes a first upper wall portion supported by the first support portion; and an inner periphery of the first recess portion, which is placed on the first recess portion. An annular second lower wall portion having a first gap with the surface, a second support portion provided on an upper surface of the second lower wall portion, and supported by the second support portion, An inner frame having an annular second upper wall portion disposed inside the first upper wall portion; and the first lower wall portion and the second lower wall disposed in the first gap. A first spacer in contact with the part, and a stator comprising:
A rotor disposed inside the stator;
A rotating electrical machine. A first lower wall portion formed in an annular shape and having an annular first recessed portion formed in a range from the inner peripheral surface to a radially intermediate portion of the upper surface, and a first support portion provided on the upper surface And an outer frame that is formed in an annular shape and includes a first upper wall portion supported by the first support portion, and is fixed to an installation location.
An annular second lower wall portion, a second support portion provided on the upper surface of the second lower wall portion, and supported by the second support portion and disposed inside the first upper wall portion. An inner frame having an annular second upper wall portion is inserted into the outer frame through the inside of the first upper wall portion;
The second lower wall portion is placed on the first recess portion from above,
Adjust the position of the inner frame to be coaxial with the outer frame,
A first spacer is installed in a first gap between the inner peripheral surface of the first recess and the outer peripheral surface of the second lower wall portion to fix the inner frame to the outer frame in the radial direction. And
A method for assembling a stator, wherein the upper surface of the first recessed portion and the lower surface of the second lower wall portion are welded.