JP2011155805A - Method and device for detaching winding conductor of rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for detaching a winding conductor of a rotary electric machine, which directly give drawing force to the winding conductor in a stator core slot. <P>SOLUTION: A wedge plate is engaged with a wedge groove of the slot from which a wedge has been removed. One end of a jack device is fixed to a radial direction inner face of the winding conductor to be detached, with nails and a fixed plate. The other end of the jack device is coupled to the wedge plate engaged with the wedge groove. The jack device is operated and the winding conductor is detached from the slot in a radial direction in the winding conductor detaching method/device of the rotary electric machine. The winding conductor in the slot is directly drawn out and detaching work can be performed in short time. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for removing a winding conductor of a rotating electric machine, and more particularly to a method and an apparatus for removing a winding conductor inserted in each slot of a stator core of the rotating electric machine.

  In a large rotating electrical machine used in a power plant or the like, when the insulation performance of the stator winding is deteriorated, a wedge-shaped coil is used to remove the winding conductor from the stator slot when the stator winding is updated. There has been a dismantling device in which a member is inserted between winding conductors and a wire is placed on the winding conductor and pulled off (for example, see Patent Document 1). There has also been proposed a device in which the end of the stator winding is hit with a hammer and vibrations due to the impact are applied to the entire stator winding to remove the winding conductor from the slot (see, for example, Patent Document 2).

JP-A-9-74724 Japanese Patent Laid-Open No. 10-191599

  Such a conventional stator winding dismantling apparatus inserts a wedge-shaped tool from the outside of the end face of the stator core, and the winding in the stator core slot of a large rotating electrical machine such as a generator. Since the length dimension of the wire conductor is as long as several meters, in order to apply a pulling force to the winding conductor in the middle part of the stator core, the long winding conductor is pulled out from the end face part to the center part of the stator core sequentially. It was necessary to push the wedge-shaped tool while applying force, which required time and labor. Similarly, even with pulling by hammer swing, it took time and labor to pull out the winding conductor from the stator slot.

  Accordingly, an object of the present invention is to obtain a winding conductor removal method and apparatus for a rotating electrical machine that can directly apply a drawing force to a winding conductor in a slot of a stator core.

  According to this invention, in order to remove the winding conductor of the coil wound around the slotted core of the rotating electrical machine from the slot, the step of cutting and removing the coil end of the winding conductor; Removing the wedge held in the slot from the wedge groove, fitting the wedge plate into the wedge groove, attaching one end of the jack device to the radially inner surface of the winding conductor to be removed, and the wedge groove A rotation comprising: a step of connecting the other end of the jack device to the wedge plate fitted in a step; and a step of operating the jack device to remove the winding conductor from the slot in a radial direction. An electric wire winding conductor removal method is obtained.

  Further, according to the present invention, there is provided a winding removal device used for removing a winding conductor of a coil wound around a slotted core of a rotating electrical machine from the slot, and the radial inside of the winding conductor to be removed at one end. A winding conductor of a rotating electrical machine comprising: a jack device attached to a side surface; and a wedge plate that is fitted in a wedge groove of the slot and held in a radial direction and attached to the other end of the jack device A removal device is obtained.

  According to the method and apparatus for removing a winding conductor of a rotating electrical machine of the present invention, it is possible to perform the removing operation in a short time by applying a pulling force in the radial direction directly to the winding conductor in the slot of the stator core.

It is sectional drawing which shows the winding conductor removal method and apparatus of the rotary electric machine of Embodiment 1 of this invention. It is a perspective view of the winding conductor removal apparatus of the rotary electric machine of FIG. It is a perspective view which shows the winding conductor removal method and apparatus of the rotary electric machine of Embodiment 2 of this invention.

  Embodiments of the present invention will be described below.

Embodiment 1 FIG.
1 and 2, the winding conductor removing device for a rotating electrical machine according to the present invention includes a winding conductor 4 of a coil 3 inserted and wound in a slot 2 of a slotted core 1 which is a stator core of the rotating electrical machine. Is a winding removal device used for removing the wire from the slot 2. The core 1 has a hollow cylindrical shape as a whole, and a plurality of slots 2 extending in the axial direction are provided on the inner peripheral surface, and a wedge groove 5 is provided at the radially inner end of the slot 2. In the wedge groove 5, a wedge 6 for holding the winding conductor 4 is inserted. In order to remove the winding conductor 4 from the slot 2 of the core 1 of the rotating electrical machine, the winding conductor removing device for the rotating electrical machine of the present invention is attached to the core 1 as shown in FIGS. Before this, if necessary, the coil end portion (not shown) of the winding conductor 4 is cut off so that only the linear winding conductor 4 remains in the slot 2. The work is easy, and it is convenient to carry out the removed winding conductor 4 from the core 1.

  The winding conductor removing device for a rotating electrical machine according to the present invention includes a jack device 8 attached to the radially inner side surface 7 of the winding conductor 4 to be removed at one end, and a core 1 in the wedge groove 5 by fitting into the wedge groove 5. And a wedge plate 9 attached to the other end of the jack device 8 so as not to move in the radial direction. The illustrated jack device 8 includes a fixed plate 11 attached to one end of the winding conductor 4 on the radially inner side surface 7 using a nail 10 at one end.

  The jack device 8 is connected to a cylinder device 13 having a rod 12 attached to a radially inner side surface 7 of the winding conductor 4 to be removed via a fixing plate 11 and is connected to the cylinder device 13 at one end. A link mechanism 14 connected between the slot 2 into which the winding conductor 4 to be removed at the end is inserted and the slot 2 adjacent to the circumferential direction in the slot 2 is provided. The link mechanism 14 includes two arm members 15 fixed to the cylinder device 13 and extending on the opposite side in the radial direction, a leg member 17 pivotally attached to the tip of the arm member 15 with a pivot pin 16, and a leg member 17. And a universal joint 18 for connecting the wedge plate 9 to each other. Since the link mechanism 14 includes the universal joint 18, it can cope with a case where the relative position fluctuates due to the model of the rotating electrical machine or due to the movement of the winding conductor 4 during the detaching operation. Further, the arm member 15 is provided with several connecting holes 19 through which the pivot pin 16 is passed, and the position of the pivot pin 16 that couples the arm member 15 and the leg member 17 can be changed as necessary. It is like that.

  The wedge plate 9 is a short plate member having substantially the same cross-sectional shape as the wedge 6, and is attached to the link mechanism 14 of the jack device 8 via a universal joint 18. The wedge plate 9 has a slightly smaller cross-sectional dimension than the wedge 6 and is preferably held in the wedge groove 5 but can be easily inserted and removed.

  The fixing plate 11 includes a substantially rectangular mounting plate 20, a screw hole 21 provided in the center of the mounting plate 20, and nail holes 22 provided in the mounting plate 20 on both sides of the screw hole 21. In the illustrated example, the screw hole 22 is provided by a nut 23 fixed to the mounting plate 20 by welding or the like. Since the tip of the rod 12 of the cylinder device 13 is coupled to the screw hole 21 of the nut 23 by screw engagement, the rod 12 can be easily attached to and detached from the fixed plate 11. A nail 10 is inserted into the nail hole 22 of the fixing plate 11 and is driven into the winding conductor 4 to firmly fix the mounting plate 20 to the radially inner side surface of the winding conductor 4 by nail fastening.

  In the present invention, the term “nail” means a metal nail, spike (dog nail), and staple (fastening) that can be fixed by being driven into a winding conductor 4 that is usually composed of a plurality of insulated copper wires. Means nails). In order to remove the winding conductor 4, the fixing plate 11 is not used, but the screw hole 21 can be directly provided in the winding conductor 4 so that the rod 12 can be screw-engaged. It can also be fixed to the winding conductor 4 with a nail, an adhesive or the like. However, in order to perform the removal operation of the winding conductor 4 quickly, it is most preferable to fix the nail 10 by driving the nail 10 into the winding conductor 4 by striking.

  Using the winding conductor removing device for a rotating electrical machine, the winding conductor removing method for the rotating electrical machine of the present invention is executed, and the winding conductor of the coil wound around the slotted core of the rotating electrical machine is removed from the slot. In order to remove, the coil end (not shown) of the winding conductor 4 is first cut and removed. By this step, the linear winding conductor 4 provided in the axial direction in the slot of the core 1 is left in the inserted state. Next, the wedge 6 holding the winding conductor 4 in the slot 2 is removed from the wedge groove 5 so that the radially inner side surface 7 of the winding conductor 4 is exposed from the inner diameter side opening of the slot 2.

  Next, for example, 2 to 4 jack devices 8 are arranged at approximately equal intervals with a linear winding conductor 4 having a length of 5 to 8 m at an interval of about 1 to 2 m. Install the winding conductor removal device. At this time, the wedge plate 9 that connects the cylinder device 13 side, which is the other end of the jack device 8, is disposed in the slot 2 adjacent to the slot 2 in which the winding conductor 4 to be removed is inserted in the circumferential direction. is there. At this time, the wedge plate 9 of the jack device 8 is inserted and fitted into the wedge groove 5 from the end face of the core 1 and shifted to an appropriate position by shifting it in the axial direction to apply hydraulic pressure to the cylinder device 13 of each jack device 8. Make piping for. By this step, the cylinder device 13 side, which is the other end of the jack device 8, is connected to the wedge plate 9 fitted in the wedge groove 5 via the link mechanism 14.

  Further, a rod 12 which is one end of the jack device 8 is attached to the radially inner side surface 7 exposed from the slot 2 of the winding conductor 4 to be removed by using the fixed plate 11. That is, the mounting plate 20 of the fixing plate 11 is fixed to the radially inner side surface 7 of the winding conductor 4 by the nail 10, and the screw portion at the tip of the rod 12 is screwed into the screw hole 21 of the nut 23 of the fixing plate 11. Removably attach. If necessary, the position of the rod 12 with respect to the cylinder device 13 is adjusted by the rotation of the screw rod, the position of the pivot pin 16 between the arm member 15 and the leg member 17 of the link mechanism 14 is adjusted, and each jack device. By adjusting between 8, the force by the plurality of jack devices 8 can simultaneously act on the winding conductor 4. Further, the order of execution of the steps described above does not have to be the order described, and the work procedure can be appropriately changed according to the actual work situation.

  In this state, if the jack device 8 is operated by applying hydraulic pressure by a hydraulic device (not shown), the rod 12 can pull the winding conductor 4 from the slot 2 in the radial direction by the fixing plate 11 and be removed. Once the winding conductor 4 starts to move, it becomes a dynamic frictional resistance and can be pulled out with a relatively light force. When the winding conductor 4 is pulled out, the weight of the winding conductor 4 is supported and held by a support base (not shown) or the like, and all the jack devices 8 are removed, and then the drawn winding conductor 4 is used as the core. Removed from the inner surface of 1 by moving in the direction of one end surface.

  The slot 2 of the core 1 contains two winding conductors 4 on the radially inner upper opening and the rear lower opening. After the upper opening is pulled out, the lower winding conductor 4 is the same. And then pull it out. About the attachment dimension difference at this time, the positional relationship of the cylinder apparatus 13 and the rod 12 of the jack apparatus 8 can be adjusted with adjustment mechanisms, such as a full screw bolt. By repeating such a series of operations, the winding conductors 4 contained in the numerous slots 2 of the core 1 can be sequentially pulled out and removed for disassembly.

Embodiment 2. FIG.
In the winding conductor removal device for a rotating electrical machine shown in FIG. 3, the jack device 8 is removed from the cylinder device 13 that operates with liquid pressure having a rod 12 attached to the winding conductor 4 to be removed, and the cylinder device 13 is removed. A tension wire mechanism 24 connected between the power winding conductor 4 and the wedge plate 9 disposed in the slot 2 radially opposed to the slot 2 in which the winding conductor 4 to be removed is inserted; Yes.

  In the illustrated example, the tensioning mechanism 24 has a fixing plate 11 fixed by a nail 10 to a winding conductor 4 to be removed at one end (lower end in FIG. 3), and can be connected to the winding conductor 4. The first part connected to the cylinder device 13 at the other end (upper end in FIG. 3), and connected to the cylinder device 13 at one end (lower end in FIG. 3) and to be removed at the other end (upper end in FIG. 3) The winding conductor 4 is divided into a second portion connected to a wedge plate 9 disposed in the slot 2 diametrically opposed to the slot 2 in which the winding conductor 4 is inserted, and the cylinder device 13 is inserted therebetween. ing. When the winding conductor 4 is removed using this removing device, the wedge plate 9 connecting the other end of the jack device 8 is connected to the slot 2 in which the winding conductor 4 to be removed is inserted. It is arranged in the slot 2 at a position facing the opposite side in the radial direction of the core 1.

  The first portion of the tensioning mechanism 24 has a wire 26 and a fixing plate 11, and the wire 26 has an annular portion 27 at one end and is attached to a hook 28 of the fixing plate 11 connected to the winding conductor 4. It is designed to be detachable. The fixed plate 11 has a mounting plate 20 provided with a nail hole 22 so as to be fixed to the radially inner side surface 7 of the winding conductor 4 by the nail 10 in the same manner as the fixed pre-rate shown in FIGS. Instead of the nut 23 having the screw hole 21, a hook 28 is provided. An annular portion 29 is also provided at the other end of the wire 26, and the annular portion 29 is connected to the tip of the rod 12 of the cylinder device 13 by a fastening fitting 30.

  The second portion of the tensioning mechanism 24 is a length adjustment mechanism of the tensioning mechanism 24 having the lever block 31. The lever block 31, a metal fitting 32 that detachably connects the lever block 31 to the wedge plate 9, and the lever block And a connecting fitting 33 for connecting 31 to the upper end, which is the other end of the cylinder device 13.

  In order to remove the winding conductor 4 from the slot 2 by using such a winding conductor removing device for a rotating electrical machine, the same processes as those shown in FIGS. Can be removed. That is, if necessary, the coil end of the winding conductor 4 is cut and removed, the wedge 6 holding the winding conductor 4 in the slot 2 is removed from the wedge groove 5, and the wedge plate 9 is fitted into the wedge groove 5. One end of the jack device 8 is attached to the radially inner side surface 7 of the winding conductor 4 to be removed, the other end of the jack device 8 is connected to the wedge plate 9 fitted in the wedge groove 5, and the jack device 8 is operated. Thus, the winding conductor 4 is removed from the slot 2 in the radial direction. When attaching one end of the jack device 8 to the winding conductor 4 to be removed, the fixing plate 11 is fixed to the radially inner side surface 7 with the nail 10 and the one end of the jack device 8 is detachably attached to the fixing plate 11. Is desirable. Moreover, it is desirable to arrange the wedge plate 9 that connects the other end of the jack device 8 in the slot 2 that is radially opposed to the slot 2 in which the winding conductor 4 to be removed is inserted.

  In this way, by applying hydraulic pressure to the cylinder device 13 of the jack device 8 and operating a plurality of jack devices 8 for pulling out simultaneously, the winding conductor 4 can be pulled out from the slot 2 in the radially inward direction of the core 1. it can. When the winding conductor 4 is pulled out, the weight of the winding conductor 4 is supported and held in the core 1 by a support base (not shown) or the like installed in advance, and a plurality of jacking devices 8 for extraction are provided. After removing all, the removed winding conductor 4 is moved from the inner surface of the core 1 toward one end surface and carried out.

  By doing so, it is only necessary to insert one wedge plate 9 into the jacking device 8 for drawing, and the weight of the winding conductor 4 that has come out of the slot 2 of the core 1 is applied to the jacking device 8. Therefore, the jack device 8 can be easily removed and removed, and in this respect, the workability is better than that of the first embodiment described above.

  The apparatus illustrated and described above is merely an example, and various modifications are possible, and the features of each specific example can be used altogether or selectively combined. For example, the order of each step of the winding conductor removal method for a rotating electrical machine of the present invention can be changed as appropriate, and an appropriate one should be selected according to the situation at the site or the model and size of the rotating electrical machine. Can do. In the embodiment shown in FIG. 3, the cylinder device 13 is directly connected to the wedge plate 9 or the fixed plate 11, and the wire 26 (first portion) of the tensioning mechanism 24 and the lever block 31 that is a length adjusting mechanism. It is also possible to directly connect (second part).

  The present invention is applicable to a winding conductor removal method and apparatus for a rotating electrical machine.

  1 slotted core, 2 slots, 3 coils, 4 winding conductors, 5 wedge grooves, 6 wedges, 7 radial inner surfaces, 8 jack devices, 9 wedge plates, 10 nails, 11 fixing plates, 12 rods, 13 cylinder devices , 14 Link mechanism, 15 Arm member, 16 Pivoting pin, 17 Leg member, 18 Universal joint, 19 Connecting hole, 20 Mounting plate, 21 Screw hole, 22 Nail hole, 23 Nut, 24 Tension mechanism, 26 Wire, 27 , 29 annular part, 28 hook, 30, 33 fastening bracket, 31 lever block, 32 bracket.

Claims (9)

To remove the winding conductor of the coil wound around the slotted core of the rotating electrical machine from the slot,
Cutting and removing the coil end of the winding conductor;
Removing the wedge holding the winding conductor in the slot from the wedge groove;
A step of fitting a wedge plate into the wedge groove;
Attaching one end of the jack device to the radially inner surface of the winding conductor to be removed;
Connecting the other end of the jack device to the wedge plate fitted in the wedge groove;
And a step of detaching the winding conductor from the slot in a radial direction by operating the jack device.   The step of attaching one end of the jack device to the winding conductor to be removed includes fixing the fixing plate to the radially inner side surface with a nail, and removably attaching one end of the jack device to the fixing plate. The method for removing a winding conductor of a rotating electric machine according to claim 1.   2. The step of disposing the wedge plate for connecting the other end of the jack device in a slot adjacent to the slot in which the winding conductor to be removed is inserted in the circumferential direction. Or the winding conductor removal method of the rotary electric machine of 2.   2. The step of disposing the wedge plate for connecting the other end of the jack device in a slot radially opposed to a slot in which the winding conductor to be removed is inserted. Or the winding conductor removal method of the rotary electric machine of 2. A winding removal device used to remove a winding conductor of a coil wound around a slotted core of a rotating electrical machine from the slot,
A jack device attached to the radially inner side surface of the winding conductor to be removed at one end;
A winding conductor removing device for a rotating electrical machine, comprising: a wedge plate that is fitted in a wedge groove of the slot and held in a radial direction and attached to the other end of the jack device.   6. The winding conductor removing device for a rotating electrical machine according to claim 5, wherein the jack device is provided with a fixing plate attached to the one end using a nail on a radially inner side surface of the winding conductor.   A cylinder device in which the jack device operates with liquid pressure having a rod attached to the winding conductor to be removed, and a slot connected to the cylinder device at one end and into which the winding conductor to be removed is inserted at the other end The winding conductor removal of the rotary electric machine of Claim 5 or 6 provided with the link mechanism connected between the said wedge plates arrange | positioned at the slot adjacent to the circumferential direction with respect to apparatus.   The winding conductor removing device for a rotating electric machine according to claim 7, wherein the link mechanism includes a universal joint.   A cylinder device in which the jack device operates with liquid pressure having a rod attached to the winding conductor to be removed, and a slot in which the winding conductor to be removed and the winding conductor to be removed are inserted. A winding conductor detaching device for a rotating electrical machine according to claim 5 or 6, further comprising a wire drawing mechanism connected to the wedge plate arranged in a slot opposed to the radial direction. .

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