JP2019083606A - Rotary electric machine, stator core and assembly method of stator - Google Patents

Abstract

To prevent occurrence of mutual positional deviation of inner clampers and respective electromagnetic steel sheets of a rotary electric machine when the electromagnetic steel sheets are laminated and clamped.SOLUTION: A rotary electric machine comprises a rotor, a stator and two bearings. The stator includes a stator core and a stator winding. The stator core has: a plurality of electromagnetic steel sheets where openings having a plurality of teeth are formed on an inner side in a radial direction; two sets of inner clampers 130 for holding the plurality of teeth from both sides in an axial direction; and two outer clampers 140 which are arranged on an outer side in the axial direction of the two sets of inner clampers 130 and hold the plurality of electromagnetic steel sheets in the axial direction via the two sets of inner clampers 130. The two sets of inner clampers 130 have a plurality of inner clamper pieces 130a disposed adjacently in a peripheral direction. In the two outer clampers 140, the two sets of inner clampers 130 and the plurality of electromagnetic steel sheets, assembly pin holes for penetrating assembly pins are formed in a plurality of common positions with intervals in the peripheral direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotating electrical machine, a stator core, and a method of assembling the stator.

  In a rotary electric machine, in the rotor core and the stator core, iron loss due to eddy current contributes to heat generation and causes reduction in efficiency.

  For this reason, a laminated core structure is generally used in which a disc-shaped lamination steel plate having an opening at the center is made in the axial direction and made of a ferromagnetic material for the rotor core and the stator core in the rotating electrical machine, This suppresses the flow of current in the axial direction.

  The stator core is disposed radially outward of the rotor core via an air gap, and is formed in a cylindrical shape as a whole. Further, a plurality of slots extending in the axial direction at intervals in the circumferential direction are formed on the radial inner surface of the stator core. Each slot houses a conductor of a stator winding.

  In order to form such a stator core, concave portions corresponding to the respective slots are formed along the central opening in each laminated electromagnetic steel sheet. As a result, the stator core is formed with the tooth portions sandwiched between the adjacent slots. The electromagnetic steel plates stacked in the axial direction are held by a thick inner clamper or the like disposed at both ends in the axial direction, and maintain an integral shape (see Patent Document 1).

  The inner clamper axially holds the teeth formed on the magnetic steel sheet. In addition, the outer clamper clamps the lamination steel plates that are stacked in the axial direction via the inner clamper from both sides in the axial direction.

Patent No. 5002671

  The inner clamper and the outer clamper are usually manufactured by gas cutting or the like because they are thick.

  On the other hand, although not carried out conventionally, temporarily, after storing the conductor for stator winding in each slot, after inserting a weir in each slot including an inner clamper, the end parts of all weirs are put together Even if there is a demand to do such cutting, it is difficult with the manufacturing accuracy of the conventional inner clamper. That is, in a large-sized rotary electric machine, it is difficult to collectively process the entire inner clamper by laser cutting or the like due to the restriction of equipment.

  If no consideration is given, the width of each of the tooth pressers is narrower than that of each of the teeth of the stator core, and since the structure as a whole is a single circle, the inner clamper and the magnetic steel sheet are usually The relative position does not have to be arranged with much accuracy. However, in the case where the wedge is to be penetrated including the inner clamper on the axially outer side of the magnetic steel sheet as described above, it is necessary to accurately arrange the fan-shaped parts of the inner clamper.

  In addition, when the magnetic steel sheets are laminated and tightened from both sides in the axial direction, it is also necessary to be aware of the possibility that positional deviations may occur inside the stator core.

  Then, this invention aims at preventing generation | occurrence | production of the mutual positional offset of an inner side clamper and each electromagnetic steel plate at the time of lamination | stacking of an electromagnetic steel plate of a rotary electric machine, and clamping.

  In order to achieve the above-mentioned object, the present invention provides a rotor having an axially extending and rotatably supported rotor shaft, a rotor core attached to the radially outer side of the rotor shaft, and an air gap And a plurality of electromagnetic steel plates provided so as to surround the radially outer side of the rotor core and having an opening having a plurality of tooth portions on the inner side in the radial direction, and restraining the plurality of tooth portions from both sides in the axial direction A cylindrical fixing comprising a set of inner clampers, and two outer clampers disposed axially outside the two sets of inner clampers and axially restraining the plurality of electromagnetic steel plates via the two sets of inner clampers. The rotor shaft is supported on both sides of the rotor shaft in the axial direction with the rotor core interposed between the stator having the iron core and the stator winding penetrating in the axial direction in the stator core. Two And a bearing, wherein each of the two sets of inner clampers includes a plurality of inner clamper pieces arranged adjacent to each other in a circumferential direction, the two outer clampers, and the second set of two outer clampers. Each of the set of inner clampers and the plurality of electromagnetic steel plates has an assembly pin hole for penetrating the assembly pin at a plurality of common positions spaced apart from each other in the axial direction as viewed in the axial direction , It is characterized.

  The present invention also includes a rotor, a cylindrical stator core provided radially outward of the rotor core via an air gap, and a stator winding axially penetrating inside the stator core. A stator core of a rotating electrical machine comprising a stator and two bearings, wherein a plurality of electromagnetic steel plates having openings formed with a plurality of tooth portions on the inner side in the radial direction, and the plurality of tooth portions on both axial sides And two outer clampers disposed axially outward of the two inner clampers and axially pressing the plurality of electromagnetic steel plates via the two inner clampers, Each of the two sets of inner clampers has a plurality of inner clamper pieces arranged adjacent to each other in the circumferential direction, and each of the two sets of inner clampers and the plurality of electromagnetic steel plates are viewed in the axial direction Circumferentially spaced apart from each other Assembly pin holes for passing the assembly pin of the position is formed, characterized in that.

  Further, according to the present invention, there is provided a method of assembling a stator of a rotary electric machine, comprising the steps of: inserting a plurality of assembling pins in a first outer clamper; and installing the first outer clamper; Placing the respective inner clamper pieces on the first outer clamper in such a manner that the assembly pins pass through the assembly pin holes of the inner clamper pieces; and electromagnetic steel sheet on the first inner clamper; By sequentially mounting the electromagnetic steel plates such that the assembly pins are passed through the assembly pin holes of the electromagnetic steel plates, a second inner clamper and a second outer clamper, and a plurality of tightening rods Integrating the stator iron core by tightening from both sides of the first outer clamper and the second outer clamper, and And having the steps of: attaching a stator core in a frame.

  According to the present invention, it is possible to prevent the occurrence of mutual positional deviation between the inner clamper and each of the electromagnetic steel plates at the time of stacking and tightening of the electromagnetic steel plates of the rotary electric machine.

It is a longitudinal cross-sectional view which shows the structure of the rotary electric machine which concerns on 1st Embodiment. It is a top view which shows the laminated structure of the electromagnetic steel sheet of the stator core of the rotary electric machine which concerns on 1st Embodiment. It is the side view which looked at the stator core of rotation electrical machinery concerning a 1st embodiment from one end of the direction of an axis. It is a fragmentary side view showing composition of a stator core of rotation electrical machinery concerning a 1st embodiment. FIG. 5 is a partial side view of FIG. 4 showing details of the periphery of stator teeth of the rotary electric machine according to the first embodiment; The stator core of the rotary electric machine which concerns on 1st Embodiment WHEREIN: When the modification of an outer side clamper is used, it is the side view seen from one end part of the axial direction of a stator core. It is a flowchart which shows the procedure of the assembling method of the stator core of the rotary electric machine which concerns on 1st Embodiment. It is a perspective view which shows the assembling condition of a stator core in the assembling method of the stator of the rotary electric machine which concerns on 1st Embodiment. It is a flowchart which shows the procedure of the stator core assembly method of the rotary electric machine which concerns on 2nd Embodiment. It is a perspective view which shows the assembled condition of a stator core in the assembly method of the stator of the rotary electric machine which concerns on 2nd Embodiment.

  Hereinafter, with reference to the drawings, a rotary electric machine, a stator, and a method of assembling the stator according to the present invention will be described. Here, parts that are the same as or similar to each other are given the same reference numerals, and duplicate explanations are omitted.

First Embodiment
FIG. 1 is a longitudinal sectional view showing the configuration of the rotary electric machine according to the first embodiment. The rotary electric machine 200 has a rotor 10, a stator 20, a frame 60, two bearings 63, and two bearing brackets 65.

  The rotor 10 is mounted at a position where the rotor shaft 11 extends in the axial direction and is rotatably supported by the two bearings 63, and the position radially sandwiched by the two bearings 63 radially outside the rotor shaft 11. And a rotor core 12.

  The stator 20 has a cylindrical stator core 100 and a stator winding 22. The stator core 100 is provided so as to surround the radially outer side of the rotor core 12 via the rotor core 12 and the air gap 18. The radially inner surface of the stator core 100 is formed with a plurality of groove-shaped stator slots 102 (FIG. 4) extending in the axial direction and spaced apart from one another in the circumferential direction. The stator winding 22 has a plurality of stator winding conductors 22a (FIG. 5). A plurality of stator winding conductors 22 pass through these stator slots 102 and extend on both axial sides to be connected to each other or to external wiring.

  The stator core 100 has a laminated structure 110, two sets of inner clampers 130 each having a plurality of inner clamper pieces 130a (FIG. 3), and two outer clampers 140.

  The laminated structure 110 has a plurality of electromagnetic steel sheets 120 laminated in the axial direction. In the laminated structure 110, a plurality of ducts (not shown) which are radial flow paths are formed at intervals in the axial direction. The laminated structure 110 is sandwiched between two sets of inner clampers 130 disposed on both axial sides thereof, and each of the two sets of inner clampers 130 is formed of two outer clampers 140 disposed on its axially outer side. It is sandwiched by each.

  A plurality of clamping rods 170 axially penetrate and clamp the laminated structure 110 in which the two outer clampers 140 and the two inner clampers 130 and the plurality of electromagnetic steel plates 120 are laminated. The clamping rod 170 has a rectangular cross section, and the shape of the clamping rod through hole 146 formed in the outer clamper 140 through which the clamping rod 170 passes is also rectangular (see FIG. 4). Both ends of the tightening rod 170 are fixed to the outer clamper 140 by welds 171. The tightening rod 170 may be a combination of a long rod having a screw formed in a region projecting outward of each of the outer clampers 140 provided on both axial sides and a combination of nuts on both sides, or a bolt at one end. It may be a combination of a bolt and a nut having a head and an external thread formed on the opposite side. The clamping rods 170 are spaced from one another in the circumferential direction (see FIG. 3 for the arrangement of the clamping rod through holes 146 formed in the outer clamper 140 through which the clamping rods 170 pass).

  The frame 60 is disposed radially outward of the stator 20 and accommodates the rotor core 12 and the stator 20. The stator 20 is fixed to the frame 60. Each of the two bearing brackets 65 is attached to both axial ends of the frame 60. Each of the two bearing brackets 65 fixedly supports each of the two bearings 63.

  FIG. 2 is a plan view showing a laminated structure of the electromagnetic steel sheets of the stator core of the rotary electric machine according to the first embodiment. The plurality of electromagnetic steel sheets 120 are punched, for example, by the same type of press, and all have the same shape and size. Each electromagnetic steel sheet 120 is a ferromagnetic disc having a circular opening at the center.

  A plurality of notches are formed on the inner side in the radial direction of each of the electromagnetic steel sheets 120, and a plurality of stator slots 102 are formed in the laminated structure 110 in which the electromagnetic steel sheets 120 are laminated. The plurality of stator slots 102 are circumferentially spaced from one another and axially penetrate the stator core 100. Stator teeth 103 are formed by stator slots 102 adjacent to each other in the circumferential direction.

  Further, a plurality of grooves are formed on the radially outer side of each of the electromagnetic steel plates 120, and a plurality of fastening rod notches 116 are formed in the laminated structure 110 in which the electromagnetic steel plates 120 are laminated. The plurality of fastening rod notches 116 are circumferentially spaced from each other, and axially penetrate the stator core 100.

  Further, in each of the electromagnetic steel sheets 120, a plurality of holes are formed circumferentially spaced from each other, and the stator core 100 is penetrated in the axial direction in the laminated structure 110 in which the electromagnetic steel sheets 120 are laminated. A plurality of assembling pin holes 115 are formed.

  FIG. 3 is a side view of the stator core as viewed from one end in the axial direction. An inner clamper 130 is disposed at the back of the outer clamper 140.

  The outer clamper 140 is an annular thick disc coaxial with the laminated structure 110 and having a circular opening 141 at its center. The radially inner portion is tapered so as to be thinner in the radial direction toward the opening 141.

  The inner clamper 130 is a thick disc coaxially arranged with the laminated structure 110. The inner clamper 130 is divided into six inner clamper pieces 130a circumferentially adjacent to each other, as shown in FIG.

  A circular opening is formed at the center of the inner clamper 130, and a plurality of radially extending tooth portion retainers 132 are formed in the opening at intervals in the circumferential direction. The circumferential angular position of the tooth presser 132 substantially coincides with the circumferential angular position of the stator tooth 103, and the shape and size of the tooth press 132 are the shape and size of the stator tooth 103. And substantially match. Each tooth presser 132 is axially outside of the stator tooth 103 and axially compresses the stator steel 103 in the axial direction, that is, the electromagnetic steel plate 120 sandwiched between the outer tooth pressers 132 in the axial direction. It is suppressed as you do.

  The respective tooth portion retainers 132 and the like of the inner clamper piece 130a are formed by processing using a laser or the like. Although FIG. 3 shows the case where the inner clamper 130 is divided into six inner clamper pieces 130a, the number of divisions is the size of the entire inner clamper 130 and the dimensional size of the processing apparatus using a laser or the like. It may be determined in consideration of the acceptance ability and the like.

  Each of the two sets of inner clampers 130 disposed on both axial outer sides of the stator core 100 is a thick disk disposed coaxially with the stator core 100. The outer clamper 140 is concentric with the inner clamper 130 and extends radially outward from the inner clamper 130. Specifically, the outer diameter of the outer clamper 140 is larger than the outer diameter of the inner clamper 130. The opening 141 of the outer clamper 140 is smaller than the outer diameter of the inner clamper 130. Further, the opening 141 of the outer clamper 140 is larger than the envelope circle of the radially outermost portion 131 a (FIG. 4) of the notch 131 of the inner clamper 130. The edge of the opening 141 of the outer clamper 140 is tapered such that its thickness decreases towards the opening, ie, radially inward.

  A plurality of tightening rod through holes 146 for penetration of the tightening rod 170 (FIG. 1) are formed at radial positions of the outer clamper 140 corresponding to the outer periphery of the inner clamper 130 at intervals in the circumferential direction. There is. Further, in the portion of the inner clamper 130 overlapping the tightening rod through holes 146 of the outer clamper 140, a plurality of tightening rod cutouts 136 for penetrating the tightening rods 170 are formed. Further, similar to the inner clamper 130, the laminated structure 110 is also formed with a clamping rod notch 116 for penetration of the clamping rod 170.

  Further, the outer clamper 140 and the outer clamper 140 in the annular range in which the outer clamper 140 and the inner clamper 130 overlap in the radial direction are spaced apart from each other in the circumferential direction at positions radially inward of the tightening rod through holes 146. A plurality of assembly pin holes 145 for penetration (FIG. 8) are formed. A plurality of assembly pin holes 135 for penetration of the assembly pins 160 are similarly formed in a portion of the inner clamper 130 overlapping the assembly pin holes 145 of the outer clamper 140.

  In FIG. 3, as the case where the fastening rod 170 has a rectangular cross section, the case where the fastening rod through hole 146 is rectangular is shown. The clamping rod is not limited to the rectangular cross section, but may be a circular cross section or a polygonal cross section.

  A plurality of clamping rod notches 136 are formed in the outer edge of the inner clamper 130 corresponding to the clamping rod through holes 146.

  In the outer clamper 140, a plurality of assembling pin holes 145 are formed circumferentially spaced from each other in a range where the inner clamper 130 and the outer clamper 140 overlap. Further, a plurality of assembly pin holes 135 are formed in the inner clamper 130 at positions respectively corresponding to the assembly pin holes 145 of the outer clamper 140.

  FIG. 4 is a partial side view showing the configuration of the stator core. In the assembled state of the stator 20, a part of the circumferential direction of the external appearance seen from the axial direction outer side of the stator 20 is shown. That is, the situation is shown in which the outer side clamper 140, the inner side clamper 130, and the laminated structure 110 in which the electromagnetic steel plates 120 are laminated at the back are overlapped from the front side.

  As shown in FIG. 4, the electromagnetic steel plates 120 constituting the laminated structure 110 and the inner clamper 130 have substantially the same shape and dimensions. Here, “substantially identical” means identical in design, and different from each other in terms of manufacturing and assembly accuracy. Therefore, the stator teeth 103 of the laminated structure 110 and the teeth press 132 of the inner clamper 130 overlap in the axial direction. Similarly, the plurality of assembly pin holes 135 and the plurality of clamping rod notches 136 of the inner clamper 130 are axially viewed with the assembly pin holes 115 and the clamping rod notches 116 formed in each electromagnetic steel plate 120 respectively. Overlap.

  In FIG. 4, for convenience of explanation, the assembly pin holes 135 and the assembly pin holes 115 shown by broken lines are displayed larger than the assembly pin holes 145 shown by solid lines, but substantially, that is, within the range of manufacturing error. , The same diameter. The diameter of the assembly pin 160 is set in consideration of this manufacturing error.

  FIG. 5 is a partial side view of FIG. 4 showing details of the periphery of the stator teeth. The front side of FIG. 5 is the inner clamper 130, and the back is the laminated structure 110 of the electromagnetic steel sheet 120.

  A stator winding conductor 22a of a stator winding 22 is axially penetrated and installed in a stator slot 102 formed in the laminated structure 110 and a notch 131 formed in the inner clamper 130.

  An axially extending plate-like ridge 150 is provided on the radially inner side of the stator winding conductor 22a in order to hold the stator winding conductor 22a. In order to fix the weir 150, the stator teeth 103 of the laminated structure 110 are provided with recesses 102b on both sides in the circumferential direction near the slot opening 102a. The wedge 150 is supported by arranging the edge of the both sides in the recessed part 102b which mutually opposes.

  FIG. 5 shows the case where the size of the tooth portion retainer 132 of the inner clamper 130 is smaller than that of the stator tooth portion 103 of the laminated structure 110 within the range of manufacturing and assembly accuracy. That is, the case where the difference d1 of the width in the circumferential direction and the difference d2 of the lengths in the radial direction are positive is shown. The laminated structure 110 and the inner clamper 130 are formed so as to be able to accommodate the stator winding conductor 22a and the ridge 150, when the difference d1 and the difference d2 are either positive or negative. . That is, in consideration of the maximum value of the absolute values of the difference d1 and the difference d2 in manufacturing and assembling accuracy, the connecting dimensions with the stator winding conductor 22a and the weir 150 are set.

  Also, the difference between the inner diameters of the assembly pin hole 115 of the laminated structure 110, the assembly pin hole 135 of the inner clamper 130, and the assembly pin hole 145 of the outer clamper 140 and the outer diameter of the clamping rod 170 (FIG. 1) The value of the gap which causes a deviation when being biased is a value sufficiently smaller than the deviation (absolute value of the differences d1 and d2) between the tooth portion retainer 132 of the inner clamper 130 and the stator slot 102.

  FIG. 6 is a side view of the stator core of the stator core of the rotary electric machine according to the first embodiment as viewed from one end in the axial direction when a modification of the outer clamper is used.

  In the case of the modified example shown in FIG. 6, the outer clamper 140a is substantially rectangular as a whole, and is indented at two corners corresponding to the locations where the legs (not shown) are provided. The outer clamper 140 a has an outer edge connected to the frame 60, so the outer shape corresponds to the shape of the inner surface of the frame 60.

  In this modification of the outer clamper 140, the radial position at which the tightening rod through hole 146a is formed is outside the outer edge of the inner clamper 130 in the radial direction. For this reason, in the inner clamper 130 and the laminated structure 110, the notch for the tightening rod 170 to pass through is not formed. The other points are the same as in the case of the outer clamper 140.

  In the case of a large electric rotating machine, the dimensions of the outer clampers 140 and 140a also increase, but the processing of the opening 141 of the outer clampers 140 and 140a is the same as the processing for the tooth portion retainer 132 of the inner clamper 130 as described above. Since accuracy is not required, it can be processed by ordinary gas cutting or the like. In addition, drilling of the plurality of assembly pin holes 145 (FIG. 4) of the outer clamper 140 is also performed after positioning in the X and Y coordinates with reference to the corner portion P as shown in FIG. Is possible.

  FIG. 7 is a flowchart showing the procedure of the method of assembling the stator core of the rotary electric machine according to the first embodiment. Hereinafter, one of the two outer clampers 140 is referred to as a first outer clamper 140 and the other outer clamper 140 is referred to as a second outer clamper 140. Similarly, of the two sets of inner clampers 130, one inner clamper 130 is called a first inner clamper 130, the other inner clamper 130 is called a second inner clamper 130, and the inner clamper piece 130a is similarly Called 1 and 2 inner clamper pieces 130a.

  At the beginning of the procedure, the preparation step is advanced (step S10). Step S10 has steps S11 to S13.

  That is, the central opening 141, the plurality of assembly pin holes 145, and the tightening rod through holes 146 are formed in the first and second outer clampers 140 (step S11). In addition, the plurality of tooth pressers 132, the plurality of assembly pin holes 135, and the plurality of fastening rod notches are formed on the plurality of first and second inner clamper pieces 130a which are components of the first and second inner clampers 130. Form 136 (step S12). Further, each of the plurality of electromagnetic steel plates 120 is processed to form the stator slot 102 of the laminated structure 110, the assembly pin hole 115 and the notch 116 for the clamping rod, and the recess 102b of the stator slot 102 Step S13). Here, the steps S11 to S13 do not have to be in any relation with each other.

  FIG. 8 is a perspective view showing the assembled state of the stator core in the method of assembling the stator of the rotary electric machine according to the first embodiment. The following steps S20 to S40 are for explanation, and FIG. 8 shows the state in step S40.

  After the preparation step of step S10 is completed, with the plurality of assembly pins 160 penetrating through the first outer clamper 140, the first outer clamper 140 with the axially outer surface facing downward is the first The outer clamper 140 is placed on a flat surface such as a surface plate (step S20). In FIG. 8 of the assembly pin holes 145 of the outer clamper 140 and the assembly pin holes 135 of the inner clamper 130, the assembly pins 160 pass through four places. Although FIG. 8 shows the case where circumferentially spaced clamping rods 170 are passed through at four places in the circumferential direction for the sake of clarity, illustration of the other clamping rods 170 is omitted, but all inner clampers are shown. The tightening rod 170 is made to penetrate at least two places in each of the pieces 130 a.

  In addition, since the head of a bolt protrudes below the outer clamper 140 when the assembly pin 160 is, for example, in a bolt shape, a spacer (not shown) or the like is provided between the outer clamper 140 and a platen to absorb this. May be installed. Here, the assembly pin 160 penetrating the first outer clamper 140 is vertically upright.

  Next, the plurality of first inner clamper pieces 130a constituting the first inner clamper 130 are superimposed on the first outer clamper 140 while passing the assembly pin 160 through the assembly pin hole 135 (step S30).

  Next, the electromagnetic steel plates 120 are sequentially mounted (step S40). That is, the assembly pin holes 115 formed in the electromagnetic steel sheet 120 are made to pass through the assembly pin 160 in accordance with the plurality of assembly pins 160 erected in the vertical direction, and the electromagnetic steel sheets 120 are stacked one by one. The electromagnetic steel plate 120 is also laminated on the first inner clamper 130 or the electromagnetic steel plate 120 mounted on the first inner clamper 130 while passing through the assembly pin 160 in the assembly pin hole 115. Here, the electromagnetic steel plates 120 to be laminated at one time may be a single sheet unit or a plurality of sheet units.

  Although FIG. 8 illustrates the plurality of electromagnetic steel plates 120 above the inner clamper 130 for the convenience of description, in practice the electromagnetic steel plates 120 are stacked directly on the inner clamper 130. Further, in FIG. 8, for convenience of explanation, the assembly pin 160 is shown to be long in the axial direction, but it is sufficient if there is a length necessary for the assembly operation.

  Thereafter, it is determined whether the total number of electromagnetic steel sheets 120 has been mounted (step S50). If it is determined that the total number of electromagnetic steel sheets 120 is not mounted (NO in step S50), step S40 and subsequent steps are repeated.

  If it is determined in step S50 that the total number of electromagnetic steel sheets 120 has been mounted (YES in step S50), the second inner clamper 130 is mounted by mounting the entire second inner clamper piece 130a, and then the second The outer clamper 140 is mounted (step S60).

  Next, the plurality of tightening rods 170 are respectively inserted and tightened, and the stator and stator core 100 are integrated by welding at both ends, for example (step S70). Once integrated, the assembly pins 160 may be cut at the outer surface of the first and second outer clampers 140 and remain in the stator core 100. Alternatively, it may be removed.

  The stator core 100 integrated by the clamping rod 170, that is, the integrated electromagnetic steel plate 120, the first and second inner clampers 130, and the first and second outer clampers 140 are mounted in the frame 60 ( Step S80).

  According to the above-described configuration and assembly procedure, for example, even if there is a gap between the adjacent inner clamper pieces 130a, each of the inner clamper pieces 130a is positioned at a regular position. As a result, it is possible to minimize the absolute value of the deviation (the differences d1 and d2 in FIG. 2) between the tooth presser 132 (FIG. 6) of the inner clamper 130 and the stator teeth 103. Thereby, in the state after assembling stator core 100, inner clamper 130 and outer clamper 140, insertion of stator winding conductor 22a into stator slot 102 and insertion of ridge 150 into recess 102b are hindered. It will not be done.

  When the wedge 150 is inserted into the recess 102b, the stator teeth 103 are mechanically coupled in the circumferential direction, so that the stator teeth 103 are less likely to vibrate even when the wedge 150 is cut. Do. Thus, the treatment, i.e. cutting, of the axial projection of the weir 150 from the inner clamper 130 takes place after all weir 150 has been inserted.

  As described above, in the rotating electrical machine according to the first embodiment, the inner clamper 130 can be accurately manufactured, processed, and precisely assembled at a predetermined position, even for a large machine. it can. As a result, it is possible to minimize the occurrence of mutual displacement between the inner clamper and each electromagnetic steel sheet at the time of lamination and tightening of the electromagnetic steel sheets 120 for lamination of the rotary electric machine 200.

  Also, as a method of processing the end of the weir provided to close the radial inner opening of each slot after housing the conductor for the stator winding in each slot, through the inner clamper 130 and the laminated structure 110, After inserting a weir into each slot from the axial outside, it becomes possible to cut the ends of all weirs at once. That is, when cutting the end of the weir, a load such as a bending force is applied to the stator teeth 103, but since the weir also exists on the inner clamper 130, the rigidity increases. Since deformation at the time of cutting is reduced, it is advantageous in securing accuracy.

Second Embodiment
FIG. 9 is a flowchart showing the procedure of the method of assembling the stator core of the rotary electric machine according to the second embodiment. This embodiment is a modification of the first embodiment. In the second embodiment, in the first embodiment, step S40 of sequentially mounting the electromagnetic steel plates 120 and step S50 of determining whether all the electromagnetic steel plates 120 are mounted or not have different steps. .

  That is, after step S30, first, a part of the electromagnetic steel plates 120 is mounted (step S110). Further, the remaining electromagnetic steel plates 120 are put together to form a laminated structure 110 (step S120). Here, if step S120 is after step S13 (FIG. 7) of preparation step S10, the anteroposterior relationship with step S10 (other than step S13) to step S110 does not matter. After step S110 and step S120, the laminated structure 110 is mounted (step S130). Step S60 and subsequent steps are the same as in the first embodiment.

  In addition, the formation of the laminated structure 110 in step S120 is a method of inserting a jig and aligning the notch portions of the respective electromagnetic steel plates 120 corresponding to the stator slots 102 in the axial direction from the central axis side of the laminated structure 110 Can be used.

  FIG. 10 is a perspective view showing an assembled state of a stator core in a method of assembling a stator of a rotary electric machine according to a second embodiment. The state in step S130 is shown.

  In the method of assembling the stator according to the second embodiment as described above, it is not necessary to sequentially mount the electromagnetic steel plates 120 one by one, and therefore, compared to the method of assembling the stator in the first embodiment. , Assembly time can be shortened.

Other Embodiments
While 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 horizontal rotary electric machine in which the rotor shaft 11 is horizontal is described as an example, but a vertical rotary electric machine may be used.

  Furthermore, the embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. The embodiments and the modifications thereof are included in the invention described in the claims and the equivalents thereof as well as included in the scope and the gist of the invention.

  DESCRIPTION OF SYMBOLS 10 ... Rotor, 11 ... Rotor shaft, 12 ... Rotor core, 18 ... Air gap, 20 ... Stator, 22 ... Stator winding, 22a ... Stator winding conductor, 60 ... Frame, 63 ... Bearing, 65 ... Bearing bracket, 100: stator core, 102: stator slot, 102a: slot opening, 102b: recess, 103: stator teeth, 104: stator inner surface, 110: laminated structure, 115: assembling pin hole, 116: ... Notches for clamping rods, 120: electromagnetic steel plates, 130: inner clampers, 130a: inner clamper pieces, 131: notches, 132: teeth holding parts, 132a: root portions, 135: assembling pin holes, 136: cutting for clamping rods Notch, 140, 140a: outer clamper, 141: opening, 145: assembled pin hole, 146, 146a: tightening rod through hole, 15 ... wedge, 160 ... assembled pin, 170 ... clamping rod 171 ... weld, 200 ... rotary electric machine

Claims (4)

A rotor having an axially extending and rotatably supported rotor shaft, and a rotor core mounted radially outward of the rotor shaft;
A plurality of electromagnetic steel plates provided so as to surround the radially outer side of the rotor core via an air gap, and having openings formed with a plurality of tooth portions on the inner side in the radial direction, and the plurality of tooth portions from both axial directions A cylindrical shape provided with two sets of inner clampers to be restrained, and two outer clampers disposed axially outside of the two sets of inner clampers and axially holding the plurality of electromagnetic steel plates via the two sets of inner clampers. A stator having a stator core and a stator winding axially passing through the stator core;
Two bearings that support the rotor shaft on each side of the rotor shaft in an axial direction sandwiching the rotor core;
A rotating electric machine equipped with
Each of the two sets of inner clampers has a plurality of inner clamper pieces arranged circumferentially adjacent to each other,
Each of the two outer clampers, the two sets of inner clampers, and the plurality of electromagnetic steel plates are penetrated by assembling pins at a plurality of common positions mutually spaced in the circumferential direction as viewed in the axial direction. Pin holes for assembly are formed,
A rotating electrical machine characterized by A stator having a rotor, a cylindrical stator core provided radially outward of the rotor core via an air gap, and a stator winding axially passing through the stator core; A stator core of a rotating electrical machine having two bearings,
A plurality of electromagnetic steel plates in which an opening having a plurality of teeth is formed radially inward,
Two sets of inner clampers that hold the plurality of teeth from both sides in the axial direction, and an outer side in the axial direction of the two sets of inner clampers, hold the plurality of electromagnetic steel plates in the axial direction via the two sets of inner clampers Outer clamper,
Equipped with
Each of the two sets of inner clampers has a plurality of inner clamper pieces arranged circumferentially adjacent to each other,
Each of the two sets of inner clampers and the plurality of electromagnetic steel plates are provided with assembly pin holes for penetrating assembly pins at a plurality of common positions spaced apart from each other in the axial direction as viewed in the axial direction ing,
A stator core of a rotating electrical machine characterized by A method of assembling a stator of a rotating electric machine,
Penetrating the plurality of assembly pins through the first outer clamper and installing the first outer clamper;
Installing the first inner clamper on the first outer clamper such that each inner clamper piece constituting the first inner clamper passes the assembly pin through the assembly pin hole of the inner clamper piece; When,
After the first inner clamper installing step, the electromagnetic steel sheet is sequentially mounted on the first inner clamper by passing the assembly pin through the assembly pin hole of the electromagnetic steel sheet. Loading step,
Mounting a second inner clamper and a second outer clamper after the electromagnetic steel plate mounting step;
Unifying the stator iron core with a plurality of tightening rods from both sides of the first outer clamper and the second outer clamper;
Attaching the integrated stator core in the frame;
A method of assembling a stator, comprising: The electromagnetic steel plate mounting step is
An electromagnetic steel sheet that forms a laminated structure of electromagnetic steel sheets by collectively laminating the remaining electromagnetic steel sheets obtained by removing some of the plurality of electromagnetic steel sheets from the whole of the electromagnetic steel sheets on the first inner clamper. Layering step,
After the first inner clamper installing step, an electromagnetic steel plate individual mounting step of mounting the plurality of electromagnetic steel sheets of the part on the first inner clamper one by one.
Mounting the laminated structure after the electromagnetic steel sheet lamination step and the electromagnetic steel plate individual mounting step;
The method of assembling the stator according to claim 3, comprising:

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