JP3774025B2 - Stator coil insertion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator coil insertion device that inserts a coil into a stator in a large capacity generator and a large capacity motor.
[0002]
[Prior art]
Generally, a large-capacity generator cuts a groove in a stator core formed by stacking thin iron plates, and a stator coil is inserted into the groove. Two coils are inserted in the groove of the stator core, the coil installed on the bottom side of the groove is called a bottom coil, and the coil installed on the upper side (inlet side) of the groove is called an upper coil. . The stator core grooves are arranged at regular intervals over the entire circumference in the circumferential direction, and a rotor is installed inside and inside the stator core via a gap. Generally, when a stator coil piece is assembled in the stator core groove, the operation is performed with the rotor removed.
[0003]
A notch is provided near the gap side of the iron core groove, and a wedge is inserted to firmly fix the coil, thereby preventing the top and bottom coils from coming out of the groove. Further, the wedge prevents vibration due to electromagnetic force acting on the coil.
[0004]
In the stator coil, an eddy current flows due to magnetic flux incident on the conductor, and loss occurs. In order to reduce this loss, the stator coil is usually formed by bundling thin conductor wires called strands and firmly fixing them with an insulator. Normally, when the stator coil is wound around the stator core , the coil pieces are first sequentially placed in the groove, and then the coil pieces are connected to each other at the end of the coil piece.
[0005]
By the way, as a method of placing this stator coil piece in the core groove, the conventional method is that many workers enter the inside from the outside of the generator with the coil piece, and all the workers lift the coil piece by hand. Inserted into the core groove. At that time, especially in the case of a large-capacity generator , since the inner diameter of the stator core is large, it is very difficult to place the stator coil piece accurately and without damage in the iron core groove located on the upper side, and the working time is also extremely long. It was hanging on.
[0006]
In addition, a method using a robot has been proposed as a method of placing the stator coil piece in the groove. A method is adopted in which the stator coil pieces are grasped independently by four robots and the arms holding the coils are extended and inserted into the iron core grooves. In this method , it is difficult to move the four robots synchronously, and it is difficult to quickly bring the coil pieces placed outside the generator into the generator. In addition, since four robots hold one coil piece at the same time , the stator coil piece could be bent or distorted and damaged even if it was not moved accurately in synchronization. Incidentally, it includes JP-A-62-81953 as this type of device.
[0007]
[Problems to be solved by the invention]
As described above, according to the conventional example, when the stator coil piece is manually placed in the stator core groove, particularly when the stator coil piece is inserted into the groove located in the upper part of the core, the coil is installed accurately and quickly without damaging the coil. To do that, it required a very large number of people and took a very long time. If the work is performed by a small number of people, there is a risk that the insulator of the coil will be greatly deteriorated by scratching the stator coil piece or bending the coil. Furthermore, even in a method using a plurality of robots, it is difficult to synchronize the operations of these robots, and eventually the stator coil pieces are bent or distorted, and the insulator is damaged.
[0008]
The purpose of the present invention does not require a great deal of effort, the insulator and without damaging, providing stator coil insertion apparatus capable of automatically inserted in the groove of the stator core of the stator coil pieces There is.
[0009]
[Means for Solving the Problems]
To achieve the above object , the present invention provides a rail extending over the inside and outside of the stator core, a moving mechanism that is guided by the rail and moves inside and outside the stator core, and a fixed mechanism provided in the moving mechanism. a rotation mechanism portion that rotates in a circumferential direction of the child core, and lifting means for lifting the radial direction of the stator core disposed on the rotary mechanism, the stator core for holding the stator coil pieces provided in the lifting unit facing the coupling holding mechanism extending in the longitudinal direction, and the coil pushing portion to push the stator coil pieces provided in the connection holding mechanism in the groove portion of the stator core, the coil pieces held by the connection holding mechanism to said groove stator coil inserted with a coil insertion apparatus and a control unit for operating the coil pusher for inserting then the coil elements in said groove with operating the rotary mechanism so as to Than is provided with the equipment.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to FIGS.
[0011]
The stator coil insertion device according to the present embodiment uses a plurality of coil insertion devices 1. As shown in FIG. 3, each coil insertion device 1 is arranged in the longitudinal direction on the inner peripheral side of the stator core 2. The ring-shaped stator core 2 has a plurality of grooves 3 on the inner peripheral side. The outer peripheral side of the stator core 2 is supported on the rotary unit 4 can Rukoto rotates with Ru to rotate the rotary unit 4 the stator core 2 in the circumferential direction. On the contrary, you may make it rotate by giving a driving force to the stator core 2 in the state supported by the rotation part 4 . The rotating unit 4 is mounted on a support base 4B installed on the floor surface 4A. The coil insertion device 1 rotates in the arrow direction θ on the inner peripheral side of the stator core 2 and is configured as follows.
[0012]
The support bracket 5 is provided with four central legs 6 and both side legs 7 at the front and rear, and a wheel 8 is attached to the lower end of each leg. Central leg 6 because they are inserted into the rail 9 laid over the inside and outside of the stator core 2, the coil insertion device 1 can be moved in and out of the stator core 2. Since both side legs 7 adjacent to the center leg 6 are engaged with the groove portion 3 and moved , the coil insertion device 1 is supported in the circumferential direction . When the coil insertion device 1 enters the inside of the stator core 2 from the outside, the wheels 8 of the both side legs 7 naturally come into contact with the vicinity of the corners of the groove portion 3, so that the lateral position of the device is accurately determined and actively The rollover of the coil insertion device 1 is prevented. Each of these legs, a telescopic mechanism 10 for example a hydraulic device is provided, to the vicinity of the groove should pay stator coil pieces 11, expansion mechanism and 10 Gasing condensation, adjust the height of each leg carrying the stator coil pieces 11 is doing.
[0013]
A rotating shaft 14 is rotatably supported between the support metal 5 and the support arm 13 inserted in the support metal 5, and the support arm 13 rotates with the rotation shaft 14 in the left-right direction, that is, in the circumferential direction. Fitting or the gear 15 to the rotary shaft 14 projecting from the support arms 14 Are What rotary gear 17 meshes with the main shaft 16. The rotating gear 17 is provided in a motor 18, for example, a DC motor. When the motor 18 rotates, the rotation of the main shaft 16 is transmitted to the rotating gear 17 and the gear 15, and the rotating shaft 14 also rotates in the same direction. It can rotate in the circumferential direction together with the shaft 14 and can be held at an arbitrary angle.
[0014]
The upper end of the support arm 13 is provided with a lifting means 19, fitting the piston rod 21 into the cylinder 20 constituting the elevating unit 19, is communicated with the hydraulic pipe 22 at both ends of the cylinder 20, the middle of the hydraulic pipes 22 the hydraulic pump 23 arranged in the arrow direction 1Y piston rod 21 flows through the oil pressure in the direction of the arrow, moves to 2Y. The control unit 24 switches the hydraulic direction of the hydraulic pump 23. A connection holding rod 25 and a holding portion 26 are provided in the middle and at the tip of the piston rod 21. The holding part 26 holds and releases the stator coil piece 11. The connection holding rod 25 extends in the longitudinal direction of the stator coil piece 11 and is connected to the piston rod 21 of the adjacent coil insertion device 1 as shown in FIG . The coupling holding rod 25 is provided with a plurality of coil pushing portions 27 at positions different from the holding portion 26, and supports the longitudinal direction of the stator coil pieces 11 at a predetermined interval .
[0015]
Next, the case where the stator coil piece 11 is fitted into the groove 3 by the plurality of coil insertion devices 1 will be described.
[0016]
The wheels 8 of the plurality of coil insertion devices 1 are engaged with the rails 9 extending outside the stator core 2, and the stator coil pieces 11 are gripped by the holding portions 26 of the coil insertion devices 1 in this state. Then, the upper end of the coil pushing portion 27 of the connection holding rod 25 is abutted against the stator coil piece 11 and held in the longitudinal direction at a predetermined interval to prevent the fixed coil piece 11 from drooping or bending . In this state, moving each coil insertion apparatus 1 connected by the connection holding rod 25, is positioned on the inner diameter side of the stator core 2. Thereafter, the motor 18 is rotated to transmit the rotation of the main shaft 16 to the rotating gear 17 and the gear 15 to rotate the rotating shaft 14 . As the rotary shaft 14 rotates, the support arm 13 rotates in the circumferential direction, stops rotating at the position of the groove 3 where the stator coil piece 11 is to be inserted, and is held at that position . Thus, in order to stop the support arm 13 at a predetermined position, a plurality of groove numbers are stored in the storage unit of the control unit 24, and the groove portion of the stator coil piece 11 to be inserted in advance by the operator. By inputting the number, the rotation angle of the motor 18 is determined, and the support arm 13 can be stopped at the insertion groove 3A of the stator coil piece 11 to be inserted.
[0017]
After the support arm 13 at a position corresponding to the insertion groove 3A is stopped by command of the control unit 24, the hydraulic pump 23 flows through the oil pressure in the direction of the arrow 2Y, and the piston rod 21 is above the temperature, the coil pusher 27 It pushes up the stator coil pieces 11 of the holding portion 26 is inserted into the insertion groove 3A by. Thereafter, the stator coil piece 11 inserted, by kicking Attach the wedge notch cut in the groove, is fixed so as not to jump out of the insertion groove 3 A.
[0018]
After inserting the stator coil pieces 11 in the insertion groove 3A, according to an instruction from the control unit 24, the hydraulic pump 23 and above the hydraulic Te switched to flow in the opposite direction to please descending the piston rod 21 in the arrow direction 1Y .
[0019]
Thus, rise and fall of the piston rod 21 is divided line control unit 24. The support arm 13 is rotated from the groove 3 of inserting the stator coil pieces 11 to the insertion groove 3A, after rotating to the insertion groove 3A rise of the piston rod 21, the stator coil piece 11 into the insertion groove 3 A The insertion and the subsequent lowering of the piston rod 21 are stored in the storage unit of the control unit 24, and the motor 18 and the hydraulic pump 23 are driven by a command from the control unit 24 .
[0020]
By the way, in the said Example, the support metal fitting 5 which has the center leg 6 and the both-sides leg 7 corresponds to the moving mechanism of this invention, and was provided with the rotating shaft 14, the gear 15, the main shaft 16, the rotating gear 17, and the motor 18. The support arm 13 corresponds to the rotation mechanism unit of the present invention. Furthermore, it goes without saying that the connection holding rod 25 corresponds to the connection holding mechanism of the present invention.
[0021]
Since it comprised as mentioned above, according to a present Example , the following effects can be achieved.
[0022]
(1) Since only setting a moving mechanism for moving in and out of the stator core, without requiring a great deal of labor, quickly the stator coil pieces 11 and smoothly, be transported into the interior of the stator core can, it is unnecessary to add excessive vibration in the stator coil pieces 11.
[0023]
(2) By providing a positioning mechanism including a control unit 24 having a storage unit that controls the rotation angle of the motor 18 and stores the groove unit number, the groove unit 3 of the stator core 2 in which the stator coil piece 11 should be accommodated, it is possible to accurately grasp without mistaking, reliably and safely the stator coil pieces 11 may automatically incorporate it into the groove portion without applying impact.
[0024]
(3) By providing the connection holding rod 25 is connected holding mechanism, without significantly deforming the stator coil piece 11, without damaging the insulation, automatically the groove portion 3 of the stator core 2 Can be inserted accurately and safely.
[0025]
(4) The stator coil piece 11 can be brought from the outside to the inside of the stator core 2 so that the stator coil piece 11 can be accurately, safely and quickly placed in the groove portion 3. Work man-hours can be greatly reduced.
[0026]
In another embodiment of the present invention shown in FIG. 4, the rotating shafts 14 of the respective coil insertion devices 1 are connected to each other, and as a result, it is possible to prevent the rotational deviation of the respective support arms 13. The stator coil piece 11 can be accurately inserted into the groove 3 over the entire length .
[0027]
【The invention's effect】
Thus, if the stator coil insertion device of the present invention is used , the stator coil piece can be automatically inserted into the groove portion of the stator core without damaging the insulator without requiring much labor. I can .
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an entire stator coil insertion device according to an embodiment of the present invention.
FIG. 2 is a partial perspective view of the stator coil insertion device of FIG.
FIG. 3 is a side sectional view of the stator coil insertion device shown in FIGS.
FIG. 4 is a side sectional view of a stator coil insertion device according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Coil insertion apparatus, 2 ... Stator iron core, 3 ... Groove part, 4 ... Rotation part, 5 ... Support metal fitting, 11 ... Stator coil piece, 13 ... Support arm, 14 ... Rotating shaft , 16 ... Main shaft, 18 ... Motor , 19: lifting means, 21 ... piston rod, 25 ... coupling holding rod, 26 ... holding part, 27 ... coil pushing part.

Claims (4)

Rail extending over the inside and outside of the stator core, a moving mechanism guided by the rail to move in and out of the stator core, and a rotating mechanism provided in the moving mechanism and rotating in the circumferential direction of the stator core When a lifting means for lifting the radial direction of the stator core disposed on the rotary mechanism, a coupling holding mechanism extending in the longitudinal direction of the stator core to hold the stator coil pieces provided in the lifting means, the coupling a coil pusher which pushes the stator coil pieces provided in the holding mechanism to the groove portion of the stator core, the coil pieces held by the connection holding mechanism actuates the rotation mechanism so as to face the groove A stator coil insertion device comprising a coil insertion device including a control unit that operates the coil push-out unit to insert the coil piece into the groove . 2. The stator coil insertion device according to claim 1 , wherein the connection holding mechanism is connected to lifting means of a plurality of coil insertion devices. 2. The stator coil insertion device according to claim 1 , wherein the connection holding mechanism is connected to lifting means of a plurality of coil insertion devices , and the rotation mechanism portions of the coil insertion devices are connected to each other.   The said moving mechanism has a some leg engaged with the said rail and the said groove part, Each of these legs is provided with the expansion-contraction mechanism which adjusts the height of a leg. 3. The stator coil insertion device according to 3.

Images