JP7065047B2 - Rotating machine, stator restraint structure, and how to assemble the rotating machine - Google Patents

Description

The present invention relates to a rotary electric machine, a stator restraint structure, and a method for assembling the rotary electric machine.

The rotary electric machine includes a rotor shaft extending in the axial direction and a rotor having a rotor core attached to the radial outer side thereof, and a cylindrical stator core provided on the radial outer side of the rotor core and its radial direction. It includes a stator having a stator winding that penetrates the inner portion in the axial direction, and a frame that is arranged radially outside the stator core and houses the rotor core and the stator.

Some rotary electric frames have a frame bottom plate, a frame side plate, and a frame end plate as outer plate portions, and are formed in a box shape. The frame end plates provided at both ends in the axial direction are formed with openings into which rotors can be inserted and bearing brackets for supporting bearings can be attached. The rotor shaft is rotatably supported by these bearings on both sides of the rotor core.

Japanese Unexamined Patent Publication No. 2000-50538

In a rotary electric machine, during its operation, the rotation of a rotor magnetic pole having a magnetic attraction causes an annular vibration in which the stator deforms into an elliptical shape in a plane in the direction perpendicular to the axis (see Patent Document 1). .. The electromagnetic vibration that causes this annulus vibration has a frequency twice the power supply frequency because it is caused by the electromagnetic force between the poles of the stator.

Further, even at the time of assembling at the time of manufacturing the rotary electric machine, there is a problem that a dedicated assembling device is required for inserting and attaching the stator.

Therefore, it is an object of the present invention to suppress the transmission of the electromagnetic vibration of the stator to the frame and to improve the assembling workability.

In order to achieve the above object, the rotary electric machine according to the present invention includes a rotor having a horizontally extending rotor shaft and a rotor core attached to the radially outer side of the rotor shaft.
A stator having a stator core arranged radially outside the rotor core, a stator winding penetrating the stator core, a stator restraint structure for statically supporting the stator, and the stator. , A frame interposed so as to surround the rotor core and the outside of the stator restraint structure, two bearings rotatably supporting the rotor shaft on both sides of the rotor core, and the frame. A rotary electric machine provided with two bearing brackets that are statically supported and statically support each of the bearings, wherein the frame has a frame bottom plate and an end plate opening formed at an axially spaced distance from each other. It has two frame end plates arranged and two frame side plates extending in the axial direction and facing each other across the stator restraint structure to form a box shape together with the frame bottom plate and the frame end plate. , The stator restraint structure is axially spaced apart from each other and has at least two stator support frames that support the stator so as to surround the stator and in a direction parallel to the axis of rotation. A plurality of connecting rods extending to connect the stator support frames to each other are provided, the stator support frame is connected to the frame by the frame bottom plate, and each of the stator support frames has a lower end. The stator is combined with the stator lower support frame by being coupled to the frame bottom plate and supporting the stator from below, and the stator lower support frame by being coupled to each other. The stator lower support frame and the fixing in a state where there is a clearance between the stator upper holding frame that is sandwiched from above and below and statically supports the stator, and the stator lower support frame and the stator upper holding frame. It is characterized by having a bolt for connecting the child upper holding frame .

Further, the stator restraint structure according to the present invention is interposed so as to surround the stator, the stator, the stator, the stator core and the stator restraint structure on the outside, and the frame bottom plate and the end plate opening. The two frame end plates are formed and arranged at intervals in the axial direction, and the frame bottom plate and the frame end plate, which extend in the axial direction and face each other with the stator restraint structure in between, form a box shape. It is a stator restraint structure that statically supports the stator of a rotary electric machine provided with a frame having two frame side plates to be formed, two bearings, and two bearing brackets, and is spaced apart from each other in the axial direction. At least two stator support frames that are arranged to support the stator so as to surround the stator, and a plurality of connections that extend in a direction parallel to the rotation axis and connect the stator support frames to each other. The stator support frame comprises a rod, and the stator support frame is connected to the frame by the frame bottom plate, and each of the stator support frames has a lower end coupled to the frame bottom plate and the stator is connected from below. The stator upper support frame that supports the stator and the stator upper support frame that supports the stator statically by sandwiching the stator from above and below in combination with the stator lower support frame by connecting to the stator lower support frame and the stator lower support frame. Having a frame and a bolt for connecting the stator lower support frame and the stator upper restraint frame with a clearance between the stator lower support frame and the stator upper restraint frame. It is characterized by.

Further, the method of assembling the rotary electric machine according to the present invention is the method of assembling the rotary electric machine, in which the lower support frame attaching step for attaching the stator lower support frame to the frame bottom plate of the frame and the lower support frame attachment. After the step, the stator is mounted on the stator lower support frame, and after the mounting step, the stator lower support frame and the stator upper restraint frame are connected by the bolt. It is characterized by having a restraint step of restraining the stator by the stator upper holding frame .

According to the present invention, it is possible to suppress the transmission of the electromagnetic vibration of the stator to the frame and improve the assembly workability.

It is a vertical sectional view which shows the structure of the rotary electric machine which concerns on 1st Embodiment. It is a perspective view which shows the structure of the frame of the rotary electric machine which concerns on 1st Embodiment. FIG. 2 is a cross-sectional view taken along the line III-III of FIG. 2 showing a configuration of a frame of a rotary electric machine according to a first embodiment. It is a flow figure which shows the procedure of the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a perspective view which shows the state at the time of insertion of the stator in the assembly method of the rotary electric machine which concerns on 1st Embodiment. It is a perspective view which shows the structure of the frame of the rotary electric machine which concerns on 2nd Embodiment. It is a flow diagram which shows the procedure of the assembly method of the rotary electric machine which concerns on 2nd Embodiment.

Hereinafter, the rotary electric machine according to the embodiment of the present invention will be described with reference to the drawings. Here, common reference numerals are given to parts that are the same as or similar to each other, and duplicate description is omitted.

[First Embodiment]
FIG. 1 is a vertical sectional view showing a configuration of a rotary electric machine according to an embodiment. The rotary electric machine 200 includes a rotor 10, a stator 20, a bearing 30, a frame 100, and a cooler 60.

The rotor 10 has a rotor shaft 11 extending horizontally in the rotation axis direction (hereinafter referred to as an axial direction), and a cylindrical rotor core 12 attached to the radial outer side of the rotor shaft 11.

The rotor shaft 11 is rotatably supported by bearings 30 on both sides of the rotor core 12 in the axial direction. A coupling portion 11a for coupling with a coupling target is provided at one end of the rotor shaft 11. An inner fan 15 is attached to the rotor shaft 11 at a portion between the bearing 30 on the coupling portion 11a side and the rotor core 12. The inner fan 15 may be provided between the bearing 30 on the opposite side and the rotor core 12.

The stator 20 has a cylindrical stator core 21 provided on the radial outer side of the rotor core 12 via a gap 18, and a rotary shaft that is radially inside the stator core 21 at a distance from each other. It has a plurality of stator windings 22 that penetrate through a slot (not shown) formed to extend in the direction.

The frame 100 surrounds the stator 20 and the rotor core 12 in the downward, lateral, and axial end directions so as to accommodate them. The stator 20 is mounted on the frame bottom plate 111 that constitutes the bottom of the frame 100. A circular end plate opening 112a is formed in the frame end plate 112, which is a portion on both sides of the frame 100 in the axial direction. In particular, the end plate opening 112a on the side where the inner fan 15 is provided is formed to have a diameter through which the inner fan 15 can pass when the rotor 10 is inserted into the stator 20 from the outside in the axial direction.

A bearing bracket 40 is attached to each frame end plate 112 so as to close the end plate opening 112a. The bearing bracket 40 statically supports the bearing 30.

The upper part of the frame 100 is open, and a cooler 60 is provided above the frame 100. The cooler 60 has a plurality of cooling pipes 61 and a cooler cover 62 for accommodating the plurality of cooling pipes 61. The space inside the frame 100s, which is the space inside the frame 100, and the space inside the cover 62a, which is the space inside the cooler cover 62, communicate with each other by the cooler inlet opening 63 and the cooler outlet opening 64. The cooler inlet opening 63 is formed above the inner fan 15. Further, the cooler outlet opening 64 is formed above the inner fan 15 on the opposite side of the rotor core 12 in the axial direction.

FIG. 2 is a perspective view showing the configuration of the frame of the rotary electric machine according to the first embodiment, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG.

The frame 100 has a frame bottom plate 111, two frame end plates 112, and two frame side plates 113 connecting between the two frame end plates 112. The frame 100 is formed by these elements into a square box shape with an open upper part. As described above, a circular end plate opening 112a is formed in each frame end plate 112.

The frame bottom plate 111 is horizontally installed so as to be in close contact with the foundation of the rotary electric machine 200. A stator restraint structure 120 is mounted on the frame bottom plate 111.

The stator restraint structure 120 has two stator support frames 121 arranged at intervals in the direction of rotation axis, and a plurality of connecting rods 122 connecting them. The number of stator support frames 121 is not limited to two, and may be three or more.

A circular support frame opening 121a is formed in each stator support frame 121. The diameter of the support frame opening 121a corresponds to the outer diameter of the stator 20. That is, when the stator 20 is press-fitted in the axial direction (see FIG. 5), the stator 20 is formed so as to be insertable and have a diameter such that the stator 20 and the stator support frame 121 are substantially in close contact with each other. Has been done.

The lower ends of the stator support frames 121 are attached to the frame bottom plate 111, respectively. Installation is by welding. It should be noted that a mechanical method such as providing a flange at the lower end of the stator support frame 121, attaching a stud bolt to the frame bottom plate 111, and mechanically connecting with a nut provided to prevent loosening may be used.

The horizontal width of the stator support frame 121 is formed to be smaller than the horizontal width of the frame end plate 112. The stator support frame 121 is connected to the frame 100 only by the frame bottom plate 111. That is, the stator restraint structure 120 is coupled only to the frame bottom plate 111.

The connecting rod 122 is formed with one or more detent holes 122a in the longitudinal direction. The detent holes 122a formed in one connecting rod 122 are formed so as to penetrate in the direction of the stator 20 in parallel with each other. A female screw is formed in the detent hole 122a and screwed with the detent bolt 122b. In FIG. 3, the detent bolt 122b is displayed only for one connecting rod 122, but the same applies to the other connecting rod 122.

The stator support frame 121 has a first partial deformation mode that bends in the rotation axis direction (x direction in FIG. 2) with the lower end connected to the frame bottom plate 111 as a restraining portion. Further, the stator support frame 121 has a second partial deformation mode in which the lower end is used as a restraining portion and is twisted in the direction around the central axis (Φ direction in FIG. 3) in the vertical direction (z direction in FIG. 3). The rigidity of the stator support frame 121 for these deformation modes is determined by the material, shape, and dimensions of the stator support frame 121, and is particularly greatly dependent on the plate thickness.

Also in the stator restraint structure 120 composed of two stator support frames 121 and a plurality of connecting rods 122 connecting them, the lower end, that is, the lower end of the stator support frame 121 is used as a restraint portion, and the upper side thereof moves in the x direction. It has a total deformation mode of the above and a second total deformation mode by the second partial deformation mode of the stator support frame 121. Further, the rigidity of the stator restraint structure 120 for the first overall deformation mode and the second overall deformation mode of the stator restraint structure 120 is determined by the combination of the rigidity of the stator support frame 121 and the rigidity of the connecting rod 122. The rigidity of the connecting rod 122 is determined by the material and the shape / dimensions.

Therefore, the natural frequency and the degree of energy absorption of the stator restraint structure 120 can be adjusted by, for example, changing the plate thickness of the stator support frame 121 and the cross-sectional dimensions of the connecting rod 122.

FIG. 4 is a flow chart showing a procedure of an assembling method of a rotary electric machine according to the first embodiment.

First, the rigidity of the stator restraint structure 120 is set (step S01). The target rigidity of the stator restraint structure 120 is set from the natural frequency range that avoids the rotation of the rotor 10 and the resonance with the electromagnetic vibration of the stator 20 and the degree of desired energy absorption. do. Next, the plate thickness of the stator support frame 121 and the cross-sectional dimensions of the connecting rod 122 are adjusted so as to achieve the target rigidity.

On the other hand, the stator 20 is assembled (step S02). That is, the stator winding 22 is incorporated in the stator core 21.

Further, the frame 100 is assembled (step S03). That is, the frame bottom plate 111, the frame end plate 112, and the frame side plate 113 are integrated.

Next, the stator restraint structure 120 is attached to the frame 100 (step S04). That is, the lower end of the stator support frame 121 of the stator restraint structure 120 is connected to the frame bottom plate 111 of the frame 100 by welding or mechanical means. At this time, the connecting rod 122 is attached to the stator support frame 121 after the two stator support frames 121 are fixed. The connecting rod 122 may be attached to the two stator support frames 121 in advance, and the stator restraint structure 120 may be integrally assembled, and then the lower end of the stator support frame 121 may be coupled to the frame bottom plate 111.

The context of the procedure of step S03 and step S04 and step S02 does not matter. That is, step S03 and step S04 may be performed before step S02, or both may be performed in parallel.

Next, in preparation for the installation of the stator 20 in the frame 100, the axial direction of the frame 100 is set in the vertical direction (step S05). That is, the frame 100 to which the stator restraint structure 120 is attached and integrated with the stator restraint structure 120 is rotated 90 degrees so that the direction corresponding to the axial direction in the state where the rotor 10 is inserted faces the vertical direction. To.

Next, the stator 20 is inserted into the stator constraint structure (step S06). FIG. 5 is a perspective view showing a state when the stator is inserted in the method of assembling the rotary electric machine according to the first embodiment. Only a part of the stator winding 22 is displayed.

The frame 100 integrated with the stator restraint structure 120 has a frame end plate 112 at the uppermost portion, and two stator support frames 121 which are vertically separated from each other below the frame end plate 112.

The stator 20 in which the stator winding 22 is incorporated and integrated into the stator core 21 is suspended in the vertical direction in the axial direction, and is inserted into the frame 100 from above.

At this time, since the diameter of the end plate opening 112a formed in the frame end plate 112 is larger than the outer diameter of the stator 20, the stator 20 first passes through the end plate opening 112a. Next, the stator 20 is inserted into the support frame opening 121a formed in the upper stator support frame 121.

The passage of the stator 20 through the support frame opening 121a is performed by pushing the stator 20 downward using a jig (not shown). The jig is formed so that the end face of the stator core 21 can be pushed without interfering with the stator winding 22.

Next, the axial direction of the frame 100 is returned to the horizontal direction (step S07). That is, although the posture of the frame 100 was changed in step S05, the posture of the frame 100 into which the stator 20 is inserted is returned to the original horizontal direction.

Next, the stator 20 is detented (step S08). Specifically, the detent bolt 122b is screwed into the detent hole 122a formed in the connecting rod 122, and the outer surface of the stator core 21 is pressed from the radial outside toward the rotation center direction. Also, if necessary, prevent the bolts from loosening. A pin may be used instead of the detent bolt.

The stator 20 is forcibly inserted into the stator support frame 121 of the stator restraint structure 120 so as to rotate around the rotation axis applied to the stator 20 during the operation of the rotary electric machine 200. It acts on the side that restrains the stator 20 against the rotational force. Normally, the frictional force between the stator 20 and the stator support frame 121 can sufficiently resist the rotational force. By attaching the detent bolt 122b to the connecting rod 122 as described above, it is possible to further secure a margin of the ability to counter the rotational force.

Next, the rotor 10 is inserted into the stator 20 in the frame 100 (step S09). That is, the rotor 10 in which the rotor core 12 is attached to the rotor shaft 11 and integrated is inserted into the stator 20. At this time, the rotor 10 is inserted into the stator 20 with the side to which the inner fan 15 is not attached as the head from the rotor core 12.

According to the present embodiment described above, the stator 20 is fixedly supported by the stator restraint structure 120, and the rigidity of the stator restraint structure 120 is determined by the plate thickness of the stator support frame 121 and the connecting rod 122. It can be adjusted by changing the cross-sectional shape and the like.

Further, the stator restraint structure 120 is coupled only to the frame bottom plate 111, and the energy of vibration generated in the stator 20 is transmitted to the stator restraint structure 120, and a part thereof is consumed by the stator restraint structure 120. After that, the energy is transferred to the frame bottom plate 111. The frame bottom plate 111 is in close contact with the foundation, and most of the energy transmitted to the frame bottom plate 111 is transmitted and diffused through the foundation.

As a result, the vibration generated in the stator 20 is hardly transmitted to, for example, the frame end plate 112, and does not cause the vibration of the bearing 30. Therefore, the vibration of the rotor 10 in the radial direction from the center of the rotation axis is suppressed.

In the conventional structure in which the stator core is press-fitted into the stator support frame, a load is applied to the stator support frame when the stator core is press-fitted. Therefore, the rigidity is increased by connecting the stator support frame to the frame. As a result, the vibration of the stator core is transmitted to the frame.

Further, in the conventional method of inserting the stator core into the stator support frame in the vertical installation or the method of inserting the stator core in the horizontal installation, processing is required to ensure accuracy after assembling the iron core. And also requires welding skills. In particular, in a two-pole machine, the number of parts is large in order to have a structure that does not transmit vibration.

On the other hand, in the press-fitting method according to the present embodiment, the insertion of the stator is completed in the step of performing detenting work at several places after the press-fitting step, so that workability and productivity are improved and the cost is reduced. Can be done.

As described above, in the rotary electric machine 200, it is possible to suppress the transmission of the electromagnetic vibration of the stator to the frame and improve the assembly workability.

[Second Embodiment]
FIG. 6 is a perspective view showing the configuration of the frame of the rotary electric machine according to the second embodiment. Only a part of the stator winding 22 is displayed.

The second embodiment is a modification of the first embodiment. That is, the rotary electric machine 200 in the second embodiment has a stator restraint structure 130 different from the stator restraint structure 120 in the first embodiment. As will be described later, in the present embodiment, the diameter of the end plate opening 112a does not have to be a diameter through which the inner fan 15 can pass, even on the side where the inner fan 15 is provided. In other respects, it is the same as the first embodiment.

The stator restraint structure 130 has two stator lower support frames 131, two stator upper restraint frames 132, and a plurality of connecting rods 133 that connect the two stator upper restraint frames 132 to each other. In addition, three or more stator lower support frames 131 and stator upper restraint frames 132 may be provided. Each of the stator lower support frame 131 and the stator upper restraint frame 132 constitutes the stator support frame 135.

The upper opening 132a of each stator upper holding frame 132 and the lower opening 131a of the stator lower support frame 131 are the stator core 21 when the stator upper holding frame 132 and the stator lower support frame 131 are connected to each other. Form a circular opening with a diameter corresponding to the outer diameter of. That is, the stator support frame 135 has a circular opening having a diameter corresponding to the outer diameter of the stator core 21.

Flange 131b is provided at each of the two upper ends of the stator lower support frame 131, and flange 132b is provided at each of the two lower ends of the stator upper holding frame 132. The stator lower support frame 131 and the stator upper restraint frame 132 are coupled to each other by, for example, connecting the flange 131b and the flange 132b with bolts (not shown).

In the stator restraint structure 130, only the stator lower support frame 131 is coupled to the frame 100. That is, the lower end of the stator lower support frame 131 is welded or mechanically fixed on the frame bottom plate 111.

The connecting rod 133 connects the two stator upper holding frames 132 to each other. The connecting rod 133 may be further provided for connecting the two stator lower support frames 131.

Although not shown, the connecting rod 133 is formed with a detent hole for the stator 20 as in the connecting rod 122 in the first embodiment.

FIG. 7 is a flow chart showing the procedure of the method of assembling the rotary electric machine according to the second embodiment. The differences from the first embodiment will be described below.

After assembling the frame 100 in step S02, the stator lower support frame 131 is attached to the frame 100 (step S11). Specifically, the lower end of the stator lower support frame 131 is attached to the frame bottom plate 111 by welding or mechanically.

After assembling the stator in step S02 and attaching the stator lower support frame 131 in step S11, the stator 20 is mounted on the stator lower support frame 131 (step S12). In this case, the stator 20 can be mounted by suspending the stator 20 from the opening above the frame 100 onto the stator lower support frame 131 with the axial direction horizontal.

Next, the stator 20 is restrained by the stator upper holding frame 132 (step S13). That is, the stator 20 is moved up and down by connecting the flange 131b of the stator lower support frame 131 and the flange 132b of the stator upper holding frame 132 and connecting the stator lower support frame 131 and the stator upper holding frame 132. It is pinched and restrained from.

Next, the stator 20 is detented (step S08). After that, it is the same as the first embodiment. In order to further secure the ability to withstand the rotational force on the stator 20, the flange 131b and the flange 132b are in a state where the stator 20 is sandwiched from above and below by the stator lower support frame 131 and the stator upper holding frame 132. Even if a clearance is created between the stator and the stator core 21, the frictional force between the stator lower support frame 131 and the stator upper restraint frame 132 and the stator core 21 is further increased by the tension of the bolts that connect the two. good.

In the present embodiment as described above, the same effect as that of the first embodiment can be obtained in reducing the vibration of the frame 100 due to the vibration of the stator 20 in the rotary electric machine 200.

Further, in assembling the rotary electric machine 200, it is possible to obtain a method in which the handling process of the frame 100 is small.

[Other embodiments]
Although the embodiments of the present invention have been described above, the embodiments are presented as examples and are not intended to limit the scope of the invention. For example, in the embodiment, the case of a horizontally-mounted fully enclosed fan-shaped rotary electric machine in which the rotor shaft extends in the horizontal direction is shown, but in the case of a vertical-mounted fully enclosed external fan-shaped rotary electric machine in which the rotor shaft extends in the vertical direction. There may be.

Further, the embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments and variations thereof are included in the scope of the invention described in the claims and the equivalent scope thereof, as are included in the scope and gist of the invention.

10 ... rotor, 11 ... rotor shaft, 11a ... coupling part, 12 ... rotor core, 15 ... inner fan, 18 ... gap, 20 ... stator, 21 ... stator core, 22 ... stator winding, 30 ... bearing, 40 ... bearing bracket, 60 ... cooler, 61 ... cooling pipe, 62 ... cooler cover, 62a ... cover inner space, 63 ... cooler inlet opening, 64 ... cooler outlet opening, 100 ... frame, 100s ... Space in the frame, 111 ... Frame bottom plate, 112 ... Frame end plate, 112a ... End plate opening, 113 ... Frame side plate, 120 ... Stator restraint structure, 121 ... Stator support frame, 121a ... Support frame opening, 122 ... Connecting rod , 122a ... Anti-rotation hole, 122b ... Anti-rotation bolt, 130 ... Stator restraint structure, 131 ... Stator lower support frame, 131a ... Lower opening, 131b ... Flange, 132 ... Stator upper restraint frame, 132a ... Upper opening , 132b ... Flange ... 133 ... Connecting rod, 135 ... Stator support frame, 200 ... Rotor

Claims (3)

A rotor having a rotor shaft extending in the horizontal direction and a rotor core attached to the radial outer side of the rotor shaft, and a rotor.
A stator having a stator core arranged radially outside the rotor core and a stator winding penetrating the stator core, and
A stator restraint structure that statically supports the stator,
With a frame interposed around the stator, the rotor core and the stator constraint structure so as to surround them.
Two bearings that rotatably support the rotor shaft on both sides of the rotor core,
Two bearing brackets that are statically supported by the frame and statically support each of the bearings,
It is a rotary electric machine equipped with
The frame has a frame bottom plate, two frame end plates having end plate openings formed and arranged at intervals in the axial direction, and the frame extending in the axial direction and facing each other with the stator restraint structure interposed therebetween. It has a frame bottom plate and two frame side plates forming a box shape together with the frame end plate.
The stator restraint structure
At least two stator support frames that are axially spaced apart from each other and support the stator so as to surround the stator.
A plurality of connecting rods extending in a direction parallel to the axis of rotation to connect the stator support frames to each other,
Equipped with
The stator support frame is connected to the frame by the frame bottom plate.
Each of the stator support frames
A stator lower support frame whose lower end is coupled to the frame bottom plate to support the stator from below,
A stator upper holding frame that holds the stator from above and below in combination with the stator lower support frame by being coupled to the stator lower support frame and statically supports the stator.
A bolt that connects the stator lower support frame and the stator upper restraint frame with a clearance between the stator lower support frame and the stator upper restraint frame, and
A rotary electric machine characterized by having . The rotor, the stator, the stator, the rotor core, and the stator are interposed so as to surround them on the outside of the restraint structure, and the frame bottom plate and the end plate opening are formed and arranged at an axial distance from each other. A frame having two frame end plates extending in the axial direction and facing each other across the stator restraint structure, and two frame side plates forming a box shape together with the frame end plate. It is a stator restraint structure for statically supporting the stator of a rotary electric machine provided with two bearings and two bearing brackets.
At least two stator support frames that are axially spaced apart from each other and support the stator so as to surround the stator.
A plurality of connecting rods extending in a direction parallel to the axis of rotation to connect the stator support frames to each other,
Equipped with
The stator support frame is connected to the frame by the frame bottom plate.
Each of the stator support frames
A stator lower support frame whose lower end is coupled to the frame bottom plate and supports the stator from below,
A stator upper holding frame that holds the stator from above and below in combination with the stator lower support frame by being coupled to the stator lower support frame and statically supports the stator.
A bolt that connects the stator lower support frame and the stator upper restraint frame with a clearance between the stator lower support frame and the stator upper restraint frame, and
Stator restraint structure characterized by having . The method for assembling a rotary electric machine according to claim 1.
A lower support frame mounting step for mounting the stator lower support frame to the frame bottom plate of the frame, and
After the lower support frame mounting step, a mounting step for mounting the stator on the stator lower support frame and a mounting step.
After the mounting step, a restraint step of restraining the stator by the stator upper restraint frame by connecting the stator lower support frame and the stator upper restraint frame with the bolt .
A method of assembling a rotary electric machine, which is characterized by having.

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