JPH0993879A - System and method for assembling stator coil of electric rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system and a method for assembling a stator coil with a small number of workers as a light work while avoiding the dangerous work. SOLUTION: A stator frame 1 is turned to the fixing slot position of a stator coil 4 by means of rotating units 5a, 5b and the stator coil 4 is mounted on a truck section 30 using a permanent scaffold 7a before the truck section 30 is guided on a rail section 50 to the inlet of stator frame 1. The truck section 30 then departs the rail section 50 and travels through the stator frame 1 to deliver the mounting stator coil 4 to a slot inserting section where the stator coil 4 is inserted into the slot of a stator core and fixed in place.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator coil assembling apparatus and an assembling method for inserting a stator coil of a rotary electric machine into a slot in a stator core.

[0002]

2. Description of the Related Art For example, assembling a stator coil of a turbine generator, which is a rotating electric machine, requires a large number of strokes.
In particular, inserting a heavy stator coil into a slot in the stator core requires a lot of work.

FIG. 13 shows the structure of the stator of the rotating electric machine, and FIG. 14 shows the external shape of the stator coil. In FIG. 13, a stator iron core 2 is provided inside a stator frame 1, and a plurality of slots 3 are formed in the stator iron core 2. The lower stator coil 4b is inserted into the slot 3, and the upper stator coil 4a is further inserted therein. The upper stator coil 4a and the lower stator coil 4b are provided on the outside of the slot 3
A wedge 8 for fixing the inside is provided in the groove of the slot 3.

FIG. 15 shows a manual assembly of a stator coil by a large number of workers. First, FIG.
As shown in (a), the stator frame 1 is set on the rolling device 5 centered in the dustproof chamber in the factory. At this time, the rolling ring 13 that comes into contact with the rolling roller 11 of the rolling device 5 is attached to the stator frame 1 in advance. Next, the temporary scaffold 7 is assembled according to the height of the stator frame 1 set on the rolling device 5, and the assembly work place for the stator coil 4 is installed. Then, when the temporary scaffold 7 is completed, the stator coil 4 is transported in a state of being placed on the coil holder 6 and is carried into the vicinity of the temporary scaffold 7 in the dustproof chamber.

After the above preparations are completed, the stator coils 4 are sequentially carried into the stator core 2 by hand, and the stator coil 4 shown in FIG.
As shown in FIG. 5B, the stator coil 4 is inserted into the slot 3 inside the stator core 2 inside the stator frame 1.

When the coil inserting device 9 is used, the stator frame 1 is set according to the installation position of the coil inserting device 9, as shown in FIG. That is, the stator frame 1 is set so that the guide beam 10 penetrates into the stator frame 1, and the guide beam 10 is supported by the columns 14. Then, as in the case of manual work, the temporary scaffold 7 is assembled according to the height of the stator frame 1 set on the rolling device 5,
An assembly workshop for the stator coil 4 is set up. Temporary scaffold 7
When completed, the stator coil 4 is carried in a state of being placed on the coil holder 6 and carried into the vicinity of the temporary scaffold 7 in the dustproof chamber.

After the above preparation is completed, the stator coil 4 is successively carried into the stator core 2 by the hoist 12 along the guide beam 10 of the coil inserting device 9. Then, the stator coil 4 is inserted into the slot 3 inside the stator core 2.

[0008]

However, in the case of assembling with the stator coil assembling apparatus 9 of FIG. 16, a guide beam 10 having a length exceeding 10 m penetrates through the stator core 2 as a guide of the coil inserting apparatus 9. It requires a setup to
Setup work is very difficult to handle.

Further, the total length of the stator frame 1 which can be applied from the coil inserting device 9 is limited by this beam length, and an obstacle when the guide beam 10 carries the stator coil 4 into the stator core 2. Therefore, there is a problem that the length of the applicable coil end portion is restricted.

Further, the clamp supporting the linear portion of the stator coil 4 cannot be easily disengaged, and it is very difficult to handle when inserting it into the slot 3.

In the case of manually assembling the stator coil 4 shown in FIG. 15, several workers are required to reach the inner diameter of the stator core 2 which is a narrow space of φ1 m to φ1.5 m and a maximum mass of 15
Since the work of inserting the stator coil 4 into the slot 3 while holding the stator coil 4 of about 0 kg by the side and inserting the stator coil 4 into the slot 3, the work is unnatural in terms of physical strength and is dangerous.

An object of the present invention is to provide a stator coil assembling apparatus and a stator coil assembling method which can avoid dangerous work and can be carried out by a small number of people in light work.

[0013]

According to a first aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine, comprising: a trolley part for carrying a stator coil into a stator frame of the rotary electric machine; and a stator core installed in the stator frame. A slot insertion part that inserts the stator coil into the slot and attaches it,
A rail portion that guides the truck portion to the inlet portion of the stator frame, a rolling device that rotates the stator frame so that the truck portion is guided to the mounting slot position of the stator coil, and a stator that is provided at both ends of the stator frame. It has a permanent scaffold for carrying out the work of mounting the stator coil to be inserted into the frame on the truck.

The stator frame is rotated to the mounting slot position of the stator coil by the rolling device, the stator coil is mounted on the truck portion on the permanent scaffold, and the truck portion is guided by the rail portion to the inlet portion of the stator frame. Then, the truck section leaves the rail section and travels inside the stator frame to pass the mounted stator coil to the slot insertion section. The slot insertion part is installed by inserting the stator coil into the slot of the stator core.

According to a second aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the first aspect, wherein
It is configured by connecting a plurality of carriages. This allows
The number of transport carriages to be connected is selected according to the length of the stator coil, and the stator coil is inserted into the stator frame.

According to a third aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the second aspect of the invention, wherein the carriage is a first wheel for traveling on a rail portion and a first wheel for traveling inside the stator frame. And two wheels. As a result, the first wheel travels along the rail portion and the second wheel
The wheels run inside the stator frame.

According to a fourth aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the second or third aspect of the present invention, wherein the carrier trucks located at both ends of the carriage portion have a stator coil when the stator coil is conveyed. Is provided with an end portion support portion for holding the end portion. As a result, the end portion of the stator coil is fixed and mounted on the carriage portion and conveyed.

According to a fifth aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the first to fourth aspects, wherein the slot insertion portion includes a chain block for supporting the stator coil in the stator core, and a slot. And a wedge for inserting the chain block into the stator core to suspend it.

The chain block is fixed with a wedge, the stator coil is hung on the chain block, and the work is inserted into the slot in the stator frame.

According to a sixth aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the first to fifth aspects of the invention, wherein the rail portion is housed inside the permanent scaffold and is fixed above the permanent scaffold when used. A rail and a movable rail which is connected to the fixed rail and is provided at an inlet portion of the stator frame, and in which a carriage portion is inserted after the stator coil is inserted into the stator frame and the carriage portion is retracted to the outside of the stator frame and then folded. .

After the trolley part carries in the stator coil and retracts, the movable rail is folded to secure a working space in the stator frame.

According to a seventh aspect of the present invention, in the stator coil assembling apparatus for a rotary electric machine according to the sixth aspect of the invention, the fixed rail provided below the fixed rail and housed inside the permanent scaffold is lifted to a position above the permanent scaffold. In addition, a lifting mechanism for adjusting the inner diameter of the stator core to a predetermined position is provided.

The lifting mechanism lifts the fixed rail housed in the permanent scaffold during its use. At that time, the ascending / descending position is adjusted to a predetermined position of the inner diameter of the stator iron core to smoothly insert the stator coil of the carriage.

According to an eighth aspect of the present invention, there is provided a stator coil assembling apparatus for a rotary electric machine according to the sixth or seventh aspect, wherein the stator coil is fixed inside one of the permanent scaffolds provided at both ends of the stator frame. The rails are stored and the other permanent scaffold can be moved. This allows
In the case of stator frames of different sizes, the other permanent scaffold is moved to install the permanent scaffold at both ends of the stator frame.

According to a ninth aspect of the present invention, there is provided a stator coil assembling method for a rotary electric machine, wherein a stator coil inserted into a slot of a status iron core provided in a stator frame of the rotary electric machine is mounted on a carriage, and the stator coil is mounted. The truck is carried into the stator frame, the stator coil is hung from the chain block supported in the stator core, the truck is retracted outside the stator frame, and then the stator coil is inserted into the slot. is there.

[0026]

Embodiments of the present invention will be described below. FIG. 1 is an external perspective view of a stator coil assembly apparatus of the present invention. A rolling device 5 for rotating the stator frame 1 is installed in the dustproof chamber in which the stator coil assembly device is installed.
And a first permanent scaffold 7a and a second permanent scaffold 7b are installed. The first permanent scaffold 7a is fixed and the second
The permanent scaffold 7b is mobile.

The second permanent scaffold 7b is movable on the movable scaffold rails 15, and the stator frame 1
Move according to the length of. Also, the second permanent scaffold 7
b is used as a tool storage space or a component storage space during the assembly work of the stator coil 4.

At both ends of the stator frame 1, rolling rings 13a and 13b for mounting and rotating on the rolling devices 5a and 5b at the both ends are added, and these rolling rings 13a and 13b are used. It is in contact with the rolling rotors 11a and 11b of the rolling devices 5a and 5b. The drive source of the rolling device 5 is attached to only one side, and the other side is a driven side without a drive source. That is, the rolling device 5a is on the driving side, and the rolling device 5b is on the driven side. By this rolling device 5, the stator frame 1 is arbitrarily rotationally adjusted to the position of the slot 3 where the work of inserting the stator coil is easy.

On the upper surface of the first permanent scaffold 7a, there are provided a coil holder 6 on which the stator coil 4 is mounted and a rail portion 50 which serves as a guide when the carriage portion 30 travels outside the stator frame 1. ing. Further, the permanent scaffold 7a is provided with two post-type jib cranes 22, and a coil suspension beam 23 is set on the post-type jib crane 22. The coil suspension beam 23 moves the stator coil 4 from the coil holder 6 It is configured to be loaded on the carrier vehicle 30. That is, the stator coil 4 of the coil holder 6 is the post-type jib crane 22, and the stator coil 4 is mounted on the truck unit 30 located on the rail unit 50. The truck unit 30 travels on the rail unit 50 and the stator coil 4 Is conveyed into the stator core 2.

Next, the coil inserting device 9 is roughly divided into three.
It consists of individual components. A trolley portion 30 that carries the coil 4 and conveys it to the inside of the stator core 2, a rail portion 50 that serves as a guide when the trolley portion 30 travels outside the stator frame 1, and a coil 4 from the trolley portion 30 inside the stator core 2. The slot insertion portion supports the suspension slot 3 until it is inserted. The slot insertion part is not shown in FIG. 1 because it is provided inside the stator frame 1. Hereinafter, these will be described.

First, FIG. 2 shows a schematic side view of the carriage unit 30. The carriage unit 30 is configured by connecting a plurality of transport carriages 29a to 29d. The respective carriages 29 are connected by a carriage connecting arm 40, and the carriages 29a and 29d located at both ends of the carriage unit 30 hold the end portion 4A of the stator coil 4 when carrying the stator coil 4. The unit support unit 28 is provided. The end portion support portion 28 is configured by attaching the rotating arm 42 to the tip end portion of the end portion support arm 41, and the end portion 4A of the stator coil 4 is formed.
Is fixed to the rotating arm 42 with a fixing band 43.

FIG. 3 is a detailed view of the carriage 29. The greatest feature of the carriage unit 30 is that each transport carriage 29 has a first wheel 32 (hereinafter referred to as a caster 32) for traveling along the rail portion 50 and a second wheel 33 for traveling within the stator core 2. There are two types of wheels (hereinafter referred to as rubber tire 33). These wheels are attached to both sides of a base 31 having a modified concave shape. The casters 32 are housed in a caster box 34.
It should be noted that by making the central portion of the base 31 concave, a larger space can be created when running inside the stator core 2.

Further, when the carriage unit 30 is traveling, the carrier carriage 29
Caster 3 for running the rail part 50 so that it does not meander.
2 is provided with a cam follower 38 that regulates the lateral direction. On the other hand, the rubber tire 33 for traveling inside the stator core 2 includes
A tilting angle is set toward the center of the carriage 29.
Then, when the transport carriage 29 travels on the rail portion 50,
A fall prevention guide 39 is provided so as not to fall due to an unbalanced load of the coil 4 to be loaded.

Since a plurality of the carriages 29 are used, a carriage connecting arm 40 for connecting the carriages 29 is provided. This dolly connecting arm 40
Is supported by a clamp 36 via a clamp base 35 provided on the upper part of the caster box 34, and is fixed by a clamp lever 37.

An end supporting portion 28 for supporting the coil end portion 4A is provided on the transport carriage 29a at the front end and the transport carriage 29d at the rear end. The end portion support arm 41 of the end portion support portion 28 is
The fixing position of the end portion support arm 41 is adjusted so that the rotating arm 42 contacts the inside of A, and as shown in FIG. 2, the rotating arm 42 and the end portion 4A of the stator coil 4 are wound and supported by the fixed band 43. To do. The fixing band 43 is not shown in FIG.

Next, after the stator coil 4 has been conveyed into the stator core 2, the fixing band 43 is taken out, the lock pin 44 is pulled out, and the rotary arm 42 is rotated about the rotary pin 45 toward the end portion support arm 41. Rotate. As a result, the bogie portion 30 can be retracted to the outside of the stator core 2 by avoiding the end portion 4A of the suspended stator coil 4.

FIG. 4 is a diagram showing the relationship between two types of wheels when the transport carriage 29 of the carriage unit 30 is running. FIG. 4A shows the case where the rail unit 50 is running, and FIG. ) Indicates the case of traveling inside the stator core 2 inside the stator frame 1. That is, in FIG. 4A, the transport carriage 29 of the carriage unit 30 travels on the casters 32 on the rail portion 50 outside the stator frame 1 and falls due to an eccentric load of the cam follower 38 and the coil 4 that regulates the lateral direction. The caster 32 travels on the rail portion 50 while being guided by the fall prevention guide 39 for avoiding it. On the other hand, FIG.
In the inside of the stator core 2 inside the stator frame 1, the rubber tire 33 runs along the inner circumference of the stator core 2 inside the stator frame 1 while being guided by the fall prevention guide 39.

Next, details of the slot insertion portion of the coil insertion device 9 are shown in FIG. The slot insertion portion includes a chain block 24 for supporting the stator coil 4 inside the stator core 2, a wedge 21 for suspending the chain block 24 inside the stator core 2, and a pulley attached to the hook tip of the chain block 24. 25 and a nylon sling 26 that holds the coil.

The chain block 24 is suspended by inserting the wedge 21 into the groove of the slot 3 and supports the stator coil 4 carried by the carrier carriage 29 of the carriage unit 30 by the nylon sling 26.

FIG. 6 shows the procedure for inserting the stator coil 4 into the slot 3. As shown in FIG. 6A, first,
After the stator coil 4 is transferred to the inside of the stator core 2 by the transfer carriage 29 of the carriage 30, the wedge 21 is moved to the upper slot 3
The chain block 24 is hung from the wedge 21, and the stator coil 4 is hung from the carriage portion 30 by the pulley 25 and the nylon sling 26. Then, the carriage 30 is retracted to the outside of the stator frame 1.

Next, as shown in FIG. 6 (b), the end portion 4A of the stator coil 4 is rotated in a predetermined direction by the manual labor of the operator. Then, as shown in FIG. 6C, the coil 4 is inserted into the slot 3. In this case, since the number of slots 3 inside the stator core 2 is an even number, the slot 3 for suspending the chain block 24 and the slot 3 for inserting the stator coil 4 always exist on the opposite faces passing through the center.

Here, as described above, the permanent scaffold 7a is equipped with two post-type jib cranes 22, and the coil suspension beam 23 is set to load the stator coil 4 from the coil holder 6 onto the carrier 30. This post-type jib crane 22 and the chain block 24 of the coil insertion portion can be operated simultaneously for each of the two used for work, so that one person can lift and lower the coil 4 by one person. . That is, since the post type jib crane 22 and the chain block 24 lift and lower the coil 4 with respect to the end portions 4A at both ends of the stator coil 4, one person can work.

Next, the rail portion 50 of the coil inserting device 9 is shown in FIG. The rail portion 50 serves as a guide when the carriage portion 30 travels outside the stator frame 1, and also allows the operator to move the carriage portion 3 from the permanent scaffold 7a to the vicinity of the stator core 2.
It will be a walking scaffold for pushing 0. Rail part 50
Has a fixed rail 51 and a movable rail 52. The fixed rail 51 is housed inside the permanent scaffold 7a, and when it is used, it is lifted to the upper surface of the permanent scaffold 7a by a lifting mechanism.

The elevating mechanism provided under the fixed rail 51 is composed of a screw jack 60 for elevating and lowering the fixed rail, and an up-and-down guide 65 for guiding vertical movement at that time. A reinforcing guide is provided accordingly. Although not shown, this lifting mechanism is constructed by being incorporated in a pedestal that supports these screw jacks 60, upper and lower guides 65, and reinforcing guides.

When the fixed rail 51 is lifted and lowered by the lifting mechanism,
This is performed by rotating the motor 61. Motor 61
Rotation of the drive shaft 6 is transmitted to the gearbox 62.
It is transmitted to each screw jack 60 via 3 and is raised and lowered. That is, the power of the motor 61 is divided into two by the gear box 62 and transmitted to the four screw jacks 60 via the shaft 63, and the four jacks are simultaneously operated so that they can move up and down while maintaining parallelism. Reference numeral 64 in FIG. 7 is a gear limit switch.

The raising / lowering operation of the rail portion 50 is shown in FIG. As an initial setup, the rail portion 50 is moved up and down so that the tip of the fixed rail 51 is located below the inner diameter of the stator core 2. And the fixed rail 51
The movable rail 52 is attached to the tip of the. The foldable movable rail 52 will be described later.

Here, even if the dimensions of the stator frame 1 change, since the rolling rings 13 attached to the outside of the stator frame 1 have the same outer diameter, the center of rotation of the stator frame 1, that is, The center height of the inner diameter of the stator core 2 is always constant. As a result, the amount of change in the working space can be reduced to only the radius difference between the inner diameters of the stator iron cores 2 and all the inner diameters of the stator iron cores 2 within the ascending / descending range can be accommodated.

Further, as described above, the elevating mechanism is incorporated in the pedestal and can be housed in the permanent scaffold 7a together with the bogie unit 30 except for the coil assembling work. When storing, the movable rail 52 is removed from the fixed rail 51, and only the fixed rail 51 is lowered from the upper surface of the permanent scaffold 7a. The removed movable rail 52 is separately delivered.

As shown in FIG. 9A, a hinged lid 16 which is divided into two parts in the longitudinal direction is attached to the opening of the upper part of the fixed scaffold 7a where the fixed rail 51 moves up and down.
As shown in (b), the rail part 50 is released only when moving up and down,
It can be closed regardless of the position of the rail portion 50. That is, the hinged lid 16 is provided with the cutout portion 17 so that the guide of the screw jack 60, the upper and lower guides 65, or the reinforcing guide can be projected above the permanent scaffold 7a. This allows the lid 1
Even if 6 is closed, it does not interfere with each guide.
It is also possible to place 0 above the permanent scaffold 7a.

By installing the lid 16, when the rail portion 50 is above the permanent scaffold 7a when the stator coil 4 is inserted, the work can be facilitated by approaching the rail portion 50, and the operation can be performed only when the coil is inserted. Can be made into a flat scaffold by closing the lid 16 after the rail part 50 is housed in the permanent scaffold 7a. Therefore, this permanent scaffold 7a can be used for multiple purposes.

Next, the movable rail 52 is the fixed rail 51.
Is provided at the inlet of the stator frame 1 so as to be foldable. The movable rail 52 is folded after the carriage portion 30 inserts the stator coil 4 into the stator frame 1 and the carriage portion 30 retreats to the outside of the stator frame 1. This is because the movable rail 52 located at the inlet of the stator frame 1 becomes an obstacle when the stator coil 4 is inserted into the slot 3 or when the coil fixing work after the stator coil 4 is inserted.

The folding of the movable rail 52 is performed by using a hydraulic cylinder 59 and a link mechanism 49 as shown in FIG. The movable rail 52 includes a first rail piece 68, a second rail piece 69, and a third rail piece 70, and the link mechanism 49 has a first link 53, a second link 54, and a third link 55. , And the first rotary shaft 56,
It comprises a second rotating shaft 57 and a third rotating shaft 58.
Then, the first rail 68 and the second rail 69 are
The second rail 69 and the third rail 70 are connected to each other by a rotating shaft 73. The second rotating shaft 57 is attached to the slider 71, and is slid along the linear guide 72 as the slider 71 moves. Below, movable rail 5
The operation procedure of No. 2 will be described. (1) By pushing out the hydraulic cylinder 59, the second rail piece 69 connected at the rod tip of the hydraulic cylinder 59 is pushed, and the fifth rotary shaft 7 of the third rail piece 70 is pushed.
The second rail piece 69 is lifted with 4 as a fulcrum. (2) By the second rail piece 69 starting to rotate,
The second link 54, which is connected by the slider 71 on the lower surface of the second rail piece 69 and the second rotation shaft 57, starts the rotational movement about the third rotation shaft 58 of the third link 55. . (3) The second rotating shaft 57 on the other side of the second link 54
Pulls the slider 71 to move the slider over the linear guide 72 to the third position.
Exercise to the link 55 side. (4) The linear movement of the slider 71 causes the first link connected to the second link 54 and the second rotary shaft 57.
The link 53 rotates about the first rotation shaft 56. (5) The first rail 53 connected to the first rotating shaft 56 is rotated by the first link 53 and is pulled toward the second rotating shaft 57 by the moving amount of the slider 71. The piece 68 is broken in parallel with the second rail piece 69 connected to the fourth rotation shaft 73, and the fourth rotation shaft 73 is broken.
A rotational movement is performed around the first link 53 side (downward).

By the flow of the above series of operations, the first rail piece 68 and the second rail piece 69 perform a folding operation and move to the position shown by the alternate long and two short dashes line in FIG. 10 with respect to the third rail piece 70. Stand up. Due to the folding function of the movable rail 52, the coil fixing work can be performed without any trouble in parallel with the coil inserting work.

A hydraulic circuit for operating the movable rail 52 is shown in FIG. The hydraulic circuit is composed of a hydraulic unit 75, a solenoid valve 76, a check valve 77, a slot valve 78, and a hose that connects the hydraulic cylinder 59 to each other. The components other than the hydraulic cylinder 59 are attached to the pedestal of the rail portion 30, and the hydraulic cylinder 5 below the movable rail 52.
The hose connected to 9 is a fixed rail 51 and a movable rail 52.
It can be separated by a coupler provided between and.

In this way, the movable rail is folded after the trolley portion 30 carries in and retracts the stator coil, thereby securing a working space in the stator frame 1.

Next, referring to FIG. 12, the stator coil 4 is attached to the stator frame 1 by the stator coil assembling apparatus described above.
3 is a flowchart showing an operation when inserting into a slot 3 of a stator core 2 inside.

First, the stator coil 4 is mounted on the trolley part 30 by the post type jib crane 22 from the coil yard 6 provided on the upper surface of the permanent scaffold 7a (S1). The bogie portion 30 having the stator coil 4 mounted thereon travels on the rail portion 50 of the permanent scaffold 7a, conveys the stator coil 4 to the inlet portion of the stator frame 1, and further the stator frame 1
Inside, the rail 50 is removed and the rubber tire 33 travels to convey the stator coil 4 to the mounting position (S).
2).

Next, the worker suspends the chain block 24 of the slot insertion portion in the slot groove with the wedge 21 (S
3). Then, the worker transfers the stator coil 4
Are transferred from the carriage unit 30 to the chain block 24 and suspended on the chain block 24 (S4).

Thereafter, the carriage 30 is made to stand by from the inside of the stator core 2 of the stator frame 1 to the outside (S).
5). At the same time, the movable rail 52 is folded, and in this state, the worker rotates the end portion 4A of the stator coil 4 to insert the stator coil 4 into the lower slot 3 (S6). Then, the stator coil 4 into which the temporary wedge is driven and inserted is fixed (S7). Next, chain block 2
4 is removed, and the stator frame 1 is rotated by the rolling device 5 (S8). Then, the operation from step S1 to step S8 is repeated until the attachment of the stator coil 4 is completed (S9, S10).

As described above, according to the embodiment of the present invention, since a plurality of transport carriages 29 are connected and used, even if the total length of the stator coil 4 changes, the transport carriage 29 is changed.
This can be easily dealt with by changing the interval between the two or changing the carriage 29.

Further, since two types of wheels are adopted for the transport carriage 29 of the carriage unit 30, it becomes possible to travel inside the stator core 2 only by the carriage unit 30. Therefore, since the guide beam penetrating the inside of the stator iron core 2 is not required, the setup work into the stator frame 1 is not necessary, and the stator coil 4 is conveyed in the stator iron core 2. You can increase the effective space of time.

Further, since the rubber tires 33 of the carriage 29 are inclined at different angles, the same carriage portion 30 can travel inside the stator frame 1 even when the inner diameters of the stator cores are different.

Since the movable rail 52 at the tip of the rail can be folded, the coil slot insertion work can be performed without any trouble. In addition, the permanent scaffold 7a is provided with a notchable lid 16 provided with a notch for the purpose of being placed by an operator.
Is provided to enable various operations near the rail portion 50. Further, when the working device is housed in the permanent scaffold and the lid 16 is closed, a wide and flat working place can be obtained, so that a more versatile working scaffold can be realized in addition to the coil insertion work. .

Next, when suspending the coil, two chain blocks 24 are simultaneously operated. By changing the operation pendant of the chain block 24 to a unique one,
Two units can be operated at the same time, and one person can work.

By using one of the permanent scaffolds 7 as a moving type, it is possible to cope with a change in the total length of the stator frame 1. In addition, the operator is freed from the work of directly feeling a large mass such as carrying and supporting the coil, and mechanized manual work performed by a large number of people, thereby saving labor and manpower.

In the embodiment of the present invention described above, the trolley part 30 is housed in the permanent scaffold 7a.
When the height of the rail is low, it is possible to remove the trolley part 30 from the rail part 50 and separately deliver it to the lower part of the permanent scaffold 7a from the rail part 50.

At this time, by preparing a roller conveyor or the like under the permanent scaffold 7a, it is possible to move the permanent scaffold 7a from the upper part to the lower part and improve the setup such as storage.

Further, in the above-mentioned embodiment, although the truck 30 uses human power, the wheels are rotated by a power source for movement, for example, a motor, or the truck 30 is attached to the outside. It is also possible to reduce the burden on the worker for carrying work by pulling it with a winch or the like.

[0069]

As described above, according to the present invention, the stator coil is carried from the work place outside the stator frame to the inside of the stator iron core by mounting the stator coil on the carriage. Therefore, the guide beam penetrating the inside of the stator iron core, which has been a hindrance factor so far, is eliminated, and workability is improved.

When inserting the stator coil into the slot in the stator core, the chain block is hung by using a coil fixing wedge, and the stator coil is hung from the carriage that has been conveyed into the stator core. After that, since the carrier truck is retracted to the outside of the frame and inserted into the slot, the operator is freed from the severe working conditions that have been conventionally performed inside the narrow stator frame.

Furthermore, since the working device can be housed in the permanent scaffold when assembling the stator coil other than the work of inserting the stator coil, the upper surface of the permanent scaffold can be used for multiple purposes.

[Brief description of drawings]

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

FIG. 2 is a side view of the carriage unit according to the embodiment of the present invention.

FIG. 3 is a perspective view of a carrier truck of a truck unit according to the embodiment of the present invention.

4A and 4B are explanatory diagrams of a traveling state of the carrier vehicle according to the embodiment of the present invention, FIG. 4A shows a state of traveling on a rail portion, and FIG. 4B shows traveling inside of a stator core. It shows the state.

FIG. 5 is a schematic diagram showing a slot insertion portion according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a slot insertion work procedure in the embodiment of the present invention.

FIG. 7 is a perspective view of a rail portion according to the embodiment of the present invention.

FIG. 8 is a schematic diagram showing an elevating operation of the rail portion according to the embodiment of the present invention.

FIG. 9 is an explanatory view of an opening of a permanent scaffold according to an embodiment of the present invention, FIG. 9 (a) shows a lid of the opening, and FIG. 9 (b) shows a fixed rail stored in the permanent scaffold. The case where the lid is opened and taken out is shown.

FIG. 10 is an explanatory diagram of a movable rail of a rail portion according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram of a hydraulic circuit used in the movable rail portion according to the embodiment of the present invention.

FIG. 12 is a flowchart showing an operation of inserting a stator coil in the embodiment of the present invention.

FIG. 13 is an explanatory view showing a state after assembly of the stator coil.

FIG. 14 is an explanatory diagram showing an external shape of a stator coil.

FIG. 15 is an explanatory diagram showing a conventional manual insertion work of a stator coil.

FIG. 16 is an explanatory view showing a work of inserting a stator coil by a conventional coil inserting device.

[Explanation of symbols]

 1 Stator Frame 2 Stator Iron Core 3 Slot 4 Stator Coil 5 Rolling Device 6 Coil Stand 7a First Permanent Scaffold 7b Second Permanent Scaffold 7 Temporary Scaffold 8 Wedge for Fixing Stator Coil 9 Coil Inserting Device 10 Guide Beam 11 Rolling Moving roller 12 Lifting bogie 13 Rolling ring 14 Strut 15 Rail for moving scaffolding 16 Lid 17 Notch 21 Chain block lifting wedge 22 Post type jib crane 23 Coil suspension beam 24 Chain block 25 Pulley 26 Nylon sling 28 End support 29 Transport cart 30 Truck part 31 Base 32 Castor 33 Rubber tire 34 Caster box 35 Clamp stand 36 Clamp 37 Clamp lever 38 Cam follower 39 Fall prevention guide 40 Cargo connecting arm 41 Coil end support 42 rotation arm 43 fixed band 44 lock pin 45 rotation pin 49 link mechanism 50 rail portion 51 fixed rail 52 movable rail 53 first link 54 second link 55 third link 56 first rotation shaft 57 second Rotary shaft 58 third rotary shaft 59 hydraulic cylinder 60 screw jack 61 motor 62 miter gear box 63 drive shaft 64 gear limit switch 65 upper and lower guides 68 first rail 69 second rail 70 third rail 71 slider 72 linear Guide 73 Fourth rotating shaft 74 Fifth rotating shaft 75 Hydraulic unit 76 Solenoid valve 77 Check valve 78 Slot valve

Claims (9)

[Claims] 1. A trolley part for carrying a stator coil into a stator frame of a rotating electric machine, a slot insertion part for inserting and mounting the stator coil in a slot of a stator core provided in the stator frame, and a dolly part. A rail portion that guides to an inlet portion of the stator frame, a rolling device that rotates the stator frame so that the carriage portion is guided to a mounting slot position of the stator coil, and both end portions of the stator frame. And a permanent scaffolding for carrying out the work of mounting the stator coil to be inserted into the stator frame on the carriage portion. 2. The stator coil assembling apparatus for a rotary electric machine according to claim 1, wherein the carriage unit is configured by connecting a plurality of transport carriages. 3. The carrier according to claim 2, further comprising a first wheel for traveling on the rail portion and a second wheel for traveling on the inside of the stator frame. Rotor coil stator coil assembling device. 4. The transport carriages located at both ends of the carriage portion are provided with end portion support portions for holding the end portions of the stator coil when the stator coil is transported. The stator coil assembling apparatus for a rotary electric machine according to claim 2 or claim 3. 5. The slot insertion portion includes a chain block for supporting the stator coil in the stator core, and a wedge inserted in the slot for suspending the chain block in the stator core. The stator coil assembling apparatus for a rotary electric machine according to any one of claims 1 to 4, wherein 6. The rail part includes a fixed rail that is housed inside the permanent scaffold and is lifted to an upper surface of the permanent scaffold when used, and the trolley provided at an inlet part of the stator frame connected to the fixed rail. 6. The stator of a rotating electric machine according to claim 1, wherein a portion is formed by inserting the stator coil into the stator frame, and the carriage portion is a movable rail that is folded after being retracted to the outside of the stator frame. Coil assembly device. 7. An elevating mechanism provided below the fixed rail, for lifting the fixed rail housed inside the permanent scaffold to a position above the permanent scaffold, and adjusting the fixed rail to a predetermined position of the inner diameter of the stator core. The stator coil assembling apparatus for a rotary electric machine according to claim 6, wherein. 8. The fixed rail is housed inside one of the permanent scaffolds provided at both ends of the stator frame, and the other permanent scaffold is movable. The stator coil assembling apparatus for a rotary electric machine according to claim 6 or 7. 9. A stator coil, which is inserted into a slot of a status iron core provided inside a stator frame of a rotating electric machine, is mounted on a truck unit, and the truck unit mounted with the stator coil is conveyed into the stator frame, A rotation characterized in that the stator coil is suspended from a chain block supported in the stator core, and the bogie portion is retracted to the outside of the stator frame, and then the stator coil is inserted into the slot. Electric motor stator coil assembly method.