JPS58119751A - Inserting device for coil and wedge in slot of magnetic core - Google Patents

Abstract

PURPOSE:To insert a coil and a wedge into the slot of a core without defect in a device which has blades, a stripper, a wedge guide and a wedge pusher by forming the stripper in special 2-stage shape. CONSTITUTION:A device is composed of blades 1, a wedge guide 2, a stripper 3, a wedge pusher 4 and a base 23. The blades 1 are disposed in the slot 9 of a core 6. The stripper 3 is coupled through a rod 5 to a hydraulic cylinder, and is constructed in two stages of stripper units 20, 21. The parts which corresponds to the slots for containing the coil 7 of the unit 20 is formed smaller than the bore of the core 6 and larger than the bore of the ring of the blades 1, and the part which corresponds to the other slot is formed substantially equal to the bore of the core 6, and the axial length is formed larger than the thickness of the laminated core 6. The periphery of the stripper 21 is larger than the bore of the core 6, and has notches to be engaged with the blades 1. Accordingly, the coil 7 and the wedge 8 can be inserted into the slot 9 without defect.

Description

[Detailed Description of the Invention] The present invention particularly aims to improve efficiency (energy saving) and reduce size and weight (
The present invention is suitable for use in a production line for electric motors and generators aimed at saving capital, and relates to a device for inserting coils and wedges into slots in the magnetic core of electric motors or generators.

An example of a conventional insertion device for inserting coils and wedges into the slots of the magnetic core of a rotating electric machine is the 3-phase 4-pole 36-slot C1.
FIGS. 1 to 6 show the insertion of one phase worth of coils for each phase of the concentrically wound coils of the stator. The conventional device will be described below with reference to these figures.

This insertion device has blade 1. It consists of a sea urchin/soji guide 2°, a 5% stripper, a 5% sea urchin pusher 4, and a base 23. A plurality of blades 1 are arranged in a ring shape according to the slot 9 of the magnetic core 6, one end of which is fixed to the base 23, and a wedge guide 2 is arranged in a ring shape outside the blade 1 (2). One end is fixed to the base 25. B) The II collar 3 is connected to a driving means such as a hydraulic cylinder (not shown) via a rod 5, and is arranged to slide along the inner surface of the blade 1. As shown in FIG. 28, the blade 1 fits into the groove 14 provided on the circumference 4 of the IJ collar 3. Sea urchin sodiputsha 4
It is disposed within the B% construction guide 2, and one end thereof is connected to a driving means such as a hydraulic shaft or the like shown in the figure, so that it slides along the above-mentioned guide 2.

Using this insertion device, the slot 9 of the iron core 6 is inserted into the slot 9 at the predetermined position A of the guide 2, and the coil 7 is set at the predetermined position of the blade 1. Next, the tooth part 12 of the magnetic core 6 is moved against the blade, the magnetic core 6 is inserted, the magnetic core 6 is fixed by a stator positioning device (not shown), and the stripper 3 is moved by driving the hydraulic cylinder. Then, as shown in FIG. 5, slide upward to push up the carp/L/7 and insert it into the slot 9. At the same time, the sea urchin and sear 8 are also inserted along the wedge guide 2 by a wedge pusher 4 connected to a hydraulic cylinder. Next, stripper 3
Then, by pulling back the wedge wedge 4 to its original position as shown in FIG.

The second phase coil is formed by pressing the first phase coil end in the outer diameter direction of the magnetic core 6 using a coil forming machine (not shown) in a separate process, and then forming the second phase coil at an electrical angle of 1 with respect to the first phase coil.
The slots are inserted 20 degrees apart as described above.

In addition, after the coil ends of the 3rd phase coil/l'i#11 phase coil and the 2nd phase coil V were press-formed as described above, they were offset by 120 degrees in electrical angle from the 2nd phase coil. Insert into the slot as described above.

In recent years, in rotating electric machines, there has been a demand for energy savings through increased efficiency and resource savings (cost reduction) through downsizing and weight reduction, and an effective means to meet these needs is to improve the space factor of conductors in stator slots. : It has become necessary.

There are two to three types of formulas for calculating the space factor of the conductor in the slot.

An example of this is shown in the following equation in FIG.

X100 (%) 1 for coil and sea urchin/soji insertion using conventional technology
Although there are some differences depending on the specifications of the rotating electric machine, when the slot conductor space factor exceeds about 60%, the following problems occur.

The conventional coil 7 and wedge 8 insertion device is shown in Fig. 28 (
As shown in FIG. 4 (28-281ilf plane view), the coil 7 and wedge 8 are simultaneously pressed into the slot 9 and inserted in the axial direction of the magnetic core 6 by the action of the stripper 3, so that the coil 7 and the wedge 8 are inserted in the axial direction of the magnetic core 6. Coil 7, slotted liner 10 due to increase in conductor space factor. An unreasonable load I11 is applied to the sea urchin and sea urchin 8, the magnetic core 6, etc., causing the following problems, resulting in decreased productivity and quality, and production becomes impossible.

) As shown in FIG. 8, the slot liner 1017
) The portion of the magnetic core 6 in contact with the end surface of the slot 9 may be damaged or broken.

('b) As shown in FIG. 9, the conductor 1 constituting the coil 7
A part of the value 1 may spill out of the z 8.

(C) As shown in FIG. 10, the sea urchin sear 8 is not fully inserted, and the sea urchin 8 is deformed and damaged.

(1) Damage or impressions occur on the conductor 11 (enamel wire) that constitutes the coil 7.

(e) If the magnetic core 6 deforms in the axial or radial direction, the value is 2.

(f) Blade 1 in m-load ML. 4. This may damage the hair of the stripper 3, etc.

The present invention has been made in view of the above points.

The purpose is to insert coils and wedges into the magnetic core slots of rotating electric machines, which have a higher conductor space factor in the slots, without causing any damage to each part.・The purpose is to obtain a device for inserting soji.

In the present invention, in order to reduce the load applied to each part when inserting the coil and wedge, the process for installing the coil and wedge is changed from the conventional one step to two steps.

That is, only the t coil is inserted into the slot from the axial direction of the iron core, but without filling the slot with conductor.

A portion of the conductor is placed between the blades outside the slot.

In addition, the inner diameter portion of the upper coil end is pressed in the outer diameter direction to make it easier to insert the wedge.

2. Do not press the coil into the slot from the radial direction of the iron core.
Insert the wedge into the slot from the axial direction of the iron core.

The above-mentioned two-step coil and wedge insertion device has a specially shaped stripper that allows it to operate with one slow motion axis and has a simple structure.

The following is an example of the present invention in the stator coil cited above in the conventional example! This will be explained with reference to FIGS. 11 to 17. This device has 1 blade, 1 sea urchin, 2 soji guides. It consists of a strike II collar 3, a wet pusher 4, and a base 23.

A plurality of blades 1 are arranged in a ring shape in accordance with the slots 9 of the iron core 6, and one end of the blades 1 is fixed to the base 25.

Further, a wedge guide 2 is arranged in a ring shape on the outside of the blade 1, and one end of the wedge guide 2 is fixed to a base. Blade 1 is
13 Fits into the groove 14 formed around the collar 3.

The stripper 3 is connected to a hydraulic cylinder (not shown) via a rod 5, and is arranged to slide along the inner surface of the blade 1.

This strip bar 5#'i has a two-stage structure of the first stripper part 20 and the second stripper part 21, and the shape of the peripheral part thereof is smoothly continuous in the axial direction.

The shape of the periphery of the first stripper part 20 is such that the part corresponding to the slot in which the coil inserted by the stripper is accommodated is smaller than the inner diameter of the magnetic core 6 and larger than the inner diameter of the ring of the blade 1, and the part corresponding to the slot in which the coil inserted by the stripper is accommodated is made larger than the inner diameter of the ring of the blade 1. The area is approximately equal to the inner diameter of the magnetic core 6. Further, the length of the first stripper portion 20 in the axial direction is at least greater than the stacking thickness of the magnetic core.

2nd step) 13 The periphery of the flange portion 21 has a notch that is larger than the inner diameter of the magnetic core and into which the blade iz is fitted.

Compared to the two, the shape and dimensions of the stripper 3 are significantly different, and accordingly, the blade 1. The length of the wedge guide 2, wedge detacher 4, etc. and the stroke of the hydraulic cylinder are increased by an amount corresponding to the stacking thickness of the magnetic core.

K inserts the coil 7 and the sea urchin strip 8 into the slot 9 of the magnetic core 6 using this insertion device by pulling down the stripper 3 below the blade 1 as shown in FIG. At the same time, set the coil 7 to the determined position of the blade 1 on the wedge guide 2.Next, align the teeth 12 of the magnetic core 6 with the blade 1, and move the magnetic core 6 onto the blade 1. 1, and the magnetic core 6 is fixed by a stator positioning device (not shown).

Stripper 5 T-111 by driving the hydraulic cylinder
As shown in FIG. 4, the coil 7 alone is pushed up by sliding upward and inserted into the slot 9 by the action of the first stripper part 20 of the stripper 3.

This ibis slot 9. Blade 1. The stripper 3 and the coil 7 are shown in FIG. 29 (29 in FIG. 14).
-29 sectional view), the conductor 1 constituting the coil 7
1 is located between the blades 1 outside the slot 9, and the inside of the slot 9 is not filled with the conductor 11, so that no unreasonable load is applied to each part such as the coil 7, slot liner 10, and iron core 6.

Next, with the rise of II tube 3, the above-mentioned 14th
After passing through the insertion process shown in the figure, the upper coil end 13 is removed toward the outside 11+ of the blade 1, as shown in FIG. From then on,
The upward movement of the coil 7 is eliminated.

In this state, the inner diameter part of the upper coil end 13 is press-formed in the outer diameter direction due to the action of the conical part 22 of the +3 collar part 2o and the first stripe part 2o, and the stripper While pressing the coil into the slot 9 by the action of the third Q x ) rl collar part 21, the wedge 8 is inserted into the slot 9 from the axial direction of the magnetic core 6 by pushing up the wet button 4. At this time, slot 9, blade 1°) +3 collar -3
And the aspect of the coil 7 is shown in the second section as the Z-28 cross section in FIG. 15.
The result is as shown in Figure 8.

Furthermore, as shown in FIG. 16, by sliding the stripper 3 and the sea urchin/sodide pusher 4 to a predetermined position above, the coil 7 is inserted into the slot/slot 9 while the inner diameter part of the upper coil end 13 remains press-formed. Insert the wedge 8 into the slot 7 while pressing.

Next, stripper 3 and wetsuit 4 are placed in the first
When the magnetic core 6 is removed from the blade 1 by returning it to its original position as shown in Figure 7, the work of installing the coil and wedge bridge is completed.

Note that the second phase coil is formed by pressing the coil end of the first phase coil in the outer diameter direction of the magnetic core 6 using a coil forming machine (not shown) in a separate process, and then applying electricity to the first phase coil. It is inserted as described above into the slots at an angle of 120°.

In addition, the third phase coil is inserted into the slot electrically offset by 120 degrees from the second phase coil after the coil ends of the first and second phase coils are press-molded as described above. be done.

With the above method, the coil 7 is pushed into the thrower 9 after the coil 7 stops moving in the axial direction within the slot 9 of the magnetic core 6, so that the load applied to each part of the insertion device is reduced compared to the conventional method. The weight is reduced compared to the example, and the coil and wedge can be inserted smoothly and easily.

Further, the shape of the coil end around the first stripper part 2o is changed by forming grooves as shown in FIGS. 18 and 19 as needed in the example shown in FIG. The contact area can be reduced to reduce frictional resistance, or the inner diameter of the magnetic core 6 can be made larger or smaller to adjust the amount of press forming of the coil end.

Further, in FIGS. 18 and 19, if the shape and dimensions of the groove are such that the blade 1tf can be fitted therein, the blade 1 can be placed as needed.

Another embodiment will be described with reference to FIGS. 20 and 21.

In contrast to the above-described embodiment, the part around a part of the first stripper that corresponds to the slot in which the coil inserted by the stripper is accommodated is approximately equal to the inner diameter of the ring of the blade. Slot 9 in the coil loading process in this case. The configuration of the blade 1, stripper 3, and coil 7 is as shown in FIG. Since the area outside the slot 9 is not filled with the conductor 11, the coil 7, the slot liner 10 and the magnetic core 6
The load s applied to each part is reduced compared to the above embodiment.

Furthermore, the shape of the coil end around the flange portion 2o of the first step I-11 can be configured as shown in FIG. Similarly, it is possible to reduce the frictional resistance against the coil, to adjust the amount of press molding of the end of the coil, and to additionally arrange blades.

Next, regarding another example @Figures 24 and 25
Illustrated in the diagram.

In contrast to the above-described embodiment, the inner diameter of the ring of the loca blade is smaller than that of the slot corresponding to the slot in which the coil inserted by the stripper is accommodated around a part of the first strike IJ collar. slot 9 in the coil insertion process in this case. Blade 1. 31 (a sectional view corresponding to FIG. 29 in the above embodiment), the -N of the conductor 11 constituting the coil 7 is connected to the blade 10 outside the slot 9. It is located on the inner diameter side of the ring between the blade and the slot.
Since the inside of the seat 9 is not filled with the conductor 11, the load applied to each part such as the coil 7, the slot/soliner 10, and the magnetic core 6 is further reduced than in the previous embodiment.

In addition, the shape of the area where the coil end is press-molded around the first stripper part '20 may be changed to the shape of the second stripper as necessary.
By configuring as shown in Fig. 6 or Fig. 27, the resistance of the busy coil is reduced by 0% as in the previous embodiment.
It is possible to adjust the amount of compression molding of the coil end, and it is also possible to add a blade to the 8th element.

As is clear from the above description, according to the present invention, the following effects can be expected in the production of a rotating electrical machine with a high slot conductor space factor.

) Compared to the conventional technology, the quality of the stator coil is improved, and it is possible to reduce the number of man-hours and materials due to the reduction in defects.

(6) This device has a simple structure and delicate operation in terms of functions, so it can reduce costs and machine failures.

(Q) It is possible to shorten the process by press forming the inner diameter part of the upper coil end at the same time as inserting the coil and sea urchin/soji.

(2) It can contribute to higher efficiency (energy saving) and smaller size and lighter weight (resource saving) of rotating electric machines.

(e) In this device, the shape of the stripper allows the product to be adapted to the specifications of the rotating electric machine.

Although the above embodiment describes a stator coil V with 3 phases, 4 poles, and 36 slots, the coils and wedges can be installed in the slots of the magnetic core in various specifications for single-phase armature windings and multi-phase armature windings. Needless to say, it can be applied to devices for insertion.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional device taken along line 1-11i1 in Figure 2; Figure 2 is a plan view of the conventional device; Figures 3, 4, 5, and Figure 6 shows conventional device I
Fig. 7 is a cross-sectional view of the slot/separate portion, and Fig. 8 is a perspective view showing damage where the slot liner contacts the slot end surface.
FIG. 9 is a sectional view of the slot and bottom part showing a state in which a part of the conductor constituting the coil has spilled out of the wedge, and FIG. 10 is a perspective view of the wedge part showing insufficient bridge insertion and deformation of the wedge. FIG. 11 is a sectional view taken along line 1'1-11 in FIG. 12 in an apparatus according to an embodiment of the present invention;
The figure is a plan view of an apparatus according to an embodiment of the present invention. 13, 14, 15, 16, and 17 are longitudinal sectional views showing the main steps of an apparatus according to an embodiment of the present invention, and FIGS. FIG. 20 is a sectional view taken along the line 20-20 of FIG. 21 in the device of the other embodiment, and FIG. Plan view of the device, II! 22 Figure EerE@ 25 Figure ha 20 Figure JI24 is a plan view showing each of the other embodiments shown in Fig. 25 is a plan view of another embodiment of the device, FIGS. 26 and 27 are plan views of other embodiments of the device of FIG. 24, and FIG. 28 is a plan view of another embodiment of the device of FIG. 4 and 15 taken along the line 28-28, FIG. 29 is a cross-sectional view taken from FIG. 14 taken along the line 29-29, and FIG. 30 is the λ diagram. 31 is a sectional view corresponding to FIG. 29 in FIG. 24, and FIG. 31 is a sectional view corresponding to FIG. 29 in FIG. 1 blade, 2: wafer 1 sodhi guide, 5: X) Soba-14: wafer pusher, 6: magnetic iron core. 7: coil, 8: wetsu a/', 9: slot 1 soto se 2 figure 3 figure 4 figure zu o'5I! l-111'' B figure 7 figure 8 figure arm 9 figure S lρ figure/Z figure 9 2 Ritsu/7 figure 78 figure 79 figure 20 sweet 2I figure appetizer 2Z figure 23 figure 25 figure middle 2 Otsu figure 27 figure procedural amendment (method) Display of the case 1988 Patent application No. -1859 Name of the invention Device for inserting carp V and wedge into the slot of the magnetic core Name of the person who amends the device Pl: '< 510) Manufactured by Hitachi Co., Ltd.
Author Name: 3 1) Shigeyo Katsu
Contents of amendments to application, specification, and drawings

Claims (1)

[Claims] An insertion device for inserting a pre-wound coil and a molded sea urchin into a slot of a magnetic iron core of a rotating electrical machine, the device comprising a multi-storage play that hooks and holds the coil. A ring constituted by a plurality of wedge guides, a ring configured by a plurality of wedge guides that hold sea urchin and sea urchin, and a strike guide guided so as to be able to move axially within the ring of this blade. The magnetic flc core is equipped with a wet pusher that is guided so as to be movable, and the magnetic core is pushed into the ring of the blade, wherein the stripper comprises the following three items. A device for inserting a coil and a wedge into a slot. (1) The stripper has a two-stage structure consisting of a part of the first stripper and a part of the second stripper, and is smoothly continuous in the axial direction. (2) [1 stripper] 1) The area surrounding a part of soba is as above) +39
The zeta value corresponds to the slot and width in which the coil inserted from the top is accommodated; Greater than thickness. (5) A part of the periphery of the second stripper has a notch that is larger than the inner diameter of the magnetic core and into which the blade is fitted.