JPH08140316A - Disassembling and cutting device of stator winding for rotating electric machine - Google Patents

Abstract

PURPOSE: To easily perform cutting operation of a stator winding by a method wherein a cutting device is mounted on a radial-direction movement device, an axial direction movement device and a circumferential direction movement device, and moved. CONSTITUTION: A plasma cutting device 11 used to cut a part in which an end part 4a of a stator winding 4 for a rotating electric machine is mounted on a radial direction position movement device 14. Since the radial direction position movement device 14 can be moved to the radial direction of a stator frame 1, it is mounted on an axial direction position movement device 13. The axial direction position movement device 13 is used to move the radial direction position movement device 14 to the axial direction of the stator frame 1. A circumferential direction position movement device 15, on this the axial direction position movement device 13 is mounted, moves the axial direction position movement device 13 to the circumferential direction of the stator frame 1. Thereby, the plasma cutting device 11 can be moved in three axial directions, i.e., the radial direction, the axial direction and the circumferential direction, of the stator frame 1. By this constitution, the disassembling and cutting operation of the stator winding can be performed easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for disassembling and cutting a stator winding of a rotating electric machine, which enables efficient disassembly and cutting of a stator winding.

[0002]

2. Description of the Related Art Generally, the structure of a stator of a rotary electric machine is shown in FIG.
It is as shown in. FIG. 2 is a partial cross-sectional view of a stator frame 1 formed in a cylindrical shape, in which a stator core 2 and a stator winding 4 are housed.

A plurality of slots 3 are formed in the stator core 2, and stator windings 4 are inserted into the slots 3. Furthermore, in order to fix the stator winding 2 in the slot 3, a stator winding wedge 5 is inserted in the groove of the slot 3.

Here, in recent years, there are increasing opportunities to renew the stator winding 4 in response to deterioration of the insulation performance of the stator winding 4 over time, and the stator is installed in each power plant. In this state, a method of updating only the stator winding 4 is often used.

To replace and update only the stator winding 4, first, the stator winding wedge 5 inserted into the slot 3 of the stator core 2 is disassembled. And after disassembling the stator winding wedge 5,
After cutting the end 4a of the stator winding 4, the stator winding 4 is pulled out from the slot 3.

As a cutting method in this case, manual work with a saw-tooth cutter using a dust collector is adopted. This is because cutting with a gas burner etc. can be done quickly, but there is a risk of fire due to combustion of insulating material and scattering of molten copper, and cutting with a rotary cutter causes the generation of chips with cutting. The problem of poor cutting efficiency due to the treatment of scattered objects and the clogging of the cutter has not been solved. For these reasons, cutting with a gas burner or cutting with a rotary cutter has not been adopted.

An outline of manual work by a saw-tooth cutter using this dust collector will be described below with reference to FIG. A wooden scaffold 6 is manufactured at the end of the stator frame 1. An operator rides on the wooden scaffold 6 and sequentially cuts the ends of the stator windings 4 one by one with a saw-tooth cutter 7 using a dust collector. Usually, two workers are provided on each side of the stator frame 1 and a total of four workers are engaged in this work. After the cutting work is completed, the stator winding 4 is sequentially withdrawn from the slot 3. After that, a new stator winding 4 is inserted into the slot 3.

[0008]

However, the work of cutting the stator winding requires a lot of manpower and time, and is a painstaking work. Further, since this work is performed in a narrow stator winding, the work posture is apt to be unnatural such as a middle waist and the like, which is very physically demanding.

[0009] The present invention is intended to enable a small number of people to perform a laborious and physically demanding work in such a narrow space as quickly as possible and with a small number of workers. An object of the present invention is to obtain a stator winding disassembling / cutting device for a rotating electric machine that can easily perform the disassembling and cutting work of the stator winding necessary for renewing the wire.

[0010]

According to a first aspect of the present invention, there is provided a plasma cutting device for cutting a portion of a rotating electric machine to which a stator winding end portion is attached, and a cylindrical fixing device equipped with the plasma cutting device. A radial position moving device movable in the radial direction of the child frame, an axial position moving device for mounting the radial moving device and moving the radial position moving device in the axial direction of the cylindrical stator frame, And a circumferential position moving device for mounting the axial position moving device and moving the axial position moving device in the circumferential direction of the cylindrical stator frame.

According to a second aspect of the present invention, the circumferential position moving device is fixed to one part of the rotating electric machine so that the plasma cutting device is located near the end of the stator winding in the first aspect of the invention. Have support for.

According to a third aspect of the present invention, one portion of the rotating electric machine to which the support according to the second aspect is attached is a stator frame.

The invention of claim 4 is the invention of claims 1 to 3.
A laser cutting device is used instead of the plasma cutting device in FIG.

[0014]

[Operation] The radial position moving device moves the plasma cutting device or the laser cutting device in the radial direction of the cylindrical stator frame, and the axial position moving device fixes the plasma cutting device or the laser cutting device in the cylindrical shape. It is moved in the axial direction of the child frame, and the plasma cutting device or the laser cutting device is moved in the circumferential direction of the cylindrical stator frame by the circumferential position moving device. As a result, the plasma cutting device or the laser cutting device can be accurately moved to the end of the stator winding to be cut.

Further, since the stator winding disassembling and cutting device is fixed to one part of the rotating electric machine, for example, the stator frame by the support, the positioning of the plasma cutting device or the laser cutting device becomes more accurate and the workability is improved. To do.

[0016]

EXAMPLE An example of the present invention will be described below. FIG. 1 is an explanatory view showing an embodiment of the present invention.

A plasma cutting device 11 for cutting a portion of the stator winding 4 of the rotating electric machine to which the end 4a is attached.
Are mounted on the radial position moving device 14. Radial position moving device 14 equipped with plasma cutting device 14
Is movable in the radial direction of the cylindrical stator frame 1. The radial movement device 14 is mounted on the axial position movement device 13.

That is, the axial position moving device 13 moves the radial position moving device 14 in the axial direction of the cylindrical stator frame 1, whereby the plasma cutting device 11 is moved.
Will be moved in the axial direction of the stator frame 1. The circumferential position moving device 15 is equipped with the axial position moving device 13 and moves the axial position moving device in the circumferential direction of the cylindrical stator frame 1. As a result, the circumferential position moving device 1
5 moves the plasma cutting device 11 in the circumferential direction of the stator frame 1.

Next, the circumferential position moving device 15 is fixed to a part of the rotary electric machine via the support so that the plasma cutting device 11 is located near the end 4a of the stator winding 4. That is, the supports 8 are attached to both ends of the stator frame 1 formed in a circular shape. This mounting is performed using a mounting tool 16 composed of machined screw holes and bolts.

A rotation driving device 9 using a motor or the like is attached to the support 8. Further, a reduction gear device 10 such as a gear is provided in association with the rotary drive device 9. A plasma cutting device 11 is mounted on the tip of the rotating disk 12 through the speed reducer 10.
The plasma cutting device 11 can be moved to any position by the position moving devices 13 to 15 in the axial longitudinal direction, the radial direction, and the circumferential direction. Each of these position moving devices 13 to 15 is configured as an integral support structure.

The operation of the stator winding disassembling and cutting apparatus according to the present invention constructed as above will be described below.
The stator winding disassembling and cutting apparatus according to the present invention is attached to both ends of the stator frame 1 by supports 8. The plasma cutting device 11 is moved to a position where the stator winding 4 is to be cut, and the axial longitudinal position changing device 13 and the radial direction changing device 14 are arranged.
Adjust and set by. After the position of the plasma cutting device 11 can be adjusted, the plasma cutting device 11 is operated to cut the position of the stator winding to be cut. The proper distance between the stator winding to be cut and the plasma cutting device is adjusted by adjusting the radial position converter 14.

When the cutting of one place is completed, the position in the radial direction is returned to the original position, the rotary drive device 9 is activated, the speed reducing device 10 is interlocked, and the circumferential position changing device 15 changes the circumferential position. Cut the stator winding of. By repeating this series of operations, the stator winding is disassembled and cut in the stator frame.

In the above description, the circumferential position moving device 1
Although 5 is attached to both ends of the stator frame 1 via the support, it is also possible to attach 5 in the stator core or at the ends of the stator core. A laser cutting device may be used instead of the plasma cutting device.

[0024]

According to the present invention, since the disassembly and cutting work of the stator winding is mechanized, the stator winding replacement work can be performed very quickly and efficiently. Further, since the plasma cutting device and the laser cutting device are used, the thermal energy is limited to a very narrow range, and there is no fear of expanding to other areas. Therefore, the cutting position can be surely cut, and the risk of spread of the insulating material can be avoided.

Further, the unnatural work posture such as the middle waist and the like associated with the work in a narrow place and the work that requires very physical strength and patience are improved. Especially, the rotating electric stator as in a power plant is improved. It is effective for winding renewal work.

In this way, the labor of disassembling and cutting the stator winding in the work of renewing the stator winding, which requires much time and manpower, can be saved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view of a stator frame accommodating a stator core and a stator winding in a conventional example.

FIG. 3 is an explanatory view of disassembly and cutting work of a stator winding according to a conventional example.

[Explanation of symbols]

 1 Stator Frame 2 Stator Iron Core 3 Slot 4 Stator Winding 5 Stator Winding Wedge 6 Wooden Scaffold 7 Sawtooth Cutter 8 Support 9 Rotation Drive Device 10 Speed Reducer 11 Plasma Cutting Device 12 Rotating Disc 13 Axial Position Movement Device 14 Radial position moving device 15 Circumferential position moving device 16 Mounting tool

Claims (4)

[Claims] 1. A stator winding disassembling and cutting apparatus for a rotating electric machine, wherein a stator iron core is housed in a stator frame formed into a cylindrical shape, and a stator winding wound around the stator iron core is disassembled and cut.
A plasma cutting device for cutting a portion of the rotating electric machine to which a stator winding end is attached, and a radial position movement capable of moving in a radial direction of the cylindrical stator frame equipped with the plasma cutting device. A device, and an axial position moving device for mounting the radial moving device and moving the radial position moving device in the axial direction of the cylindrical stator frame,
Fixing of a rotary electric machine, comprising: the axial position moving device; and a circumferential position moving device for moving the axial position moving device in a circumferential direction of the cylindrical stator frame. Sub winding disassembly and cutting device. 2. A support for fixing the circumferential position moving device to a part of the rotary electric machine so that the plasma cutting device is located near the end of the stator winding. The stator winding disassembling and cutting device for a rotating electric machine according to claim 1, characterized in that. 3. The stator winding disassembling and cutting apparatus for a rotary electric machine according to claim 2, wherein one portion of the rotary electric machine to which the support is attached is the stator frame. 4. An apparatus for disassembling and cutting a stator winding of a rotary electric machine according to claim 1, wherein a laser cutting device is used instead of the plasma cutting device.