Position correcting tool for lower-layer lead of strip coil

Abstract

The utility model relates to the technical field of water turbine stator coil installation, and discloses a strip coil lower layer lead wire position correction tool which comprises a correction straight plate and a position correction block, the position correction block is vertically connected to the side edge of the correction straight plate, the correction straight plate is used for being embedded into a stator iron core groove, and the position correction block is connected with the correction straight plate. And the end part of the calibration block is used for positioning a lead head of the lower-layer coil. The whole structure is simple, the universality is high, and the lead head at the lower coil end of the strip coil is corrected to reach the accurate position.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine stator coil technical field, concretely relates to a strip coil lower layer lead wire alignment tool. BACKGROUND

[0002] The stator coil used in large hydro-generator unit is strip coil, as shown in Figure 1 and Figure 2 , a single strip coil is divided into upper end, lower end and straight section. The assembly of strip coil is divided into upper layer and lower layer, the straight section is embedded in the stator core slot, and the lead wire heads of the upper and lower layer coils are required to be on the same straight line, so as to facilitate the assembly of the insulation box.

[0003] Chinese patent document CN107925289B discloses a stator coil, a stator equipped with the stator coil, and a rotary electric machine equipped with the stator, wherein a stator coil is inserted into a slot of a stator of a rotary electric machine, and the stator coil is characterized by being connected by a plurality of segment coils, the segment coils have an insulating film portion covered by an insulating film, and the insulating film portion of the segment coil at the coil end portion is provided with a slit or a recess.

[0004] The prior art has the following disadvantages: due to the large included angle between the upper and lower ends of the strip coil and the straight section, the coil end portion is deformed after hot pressing and forming, and the deformation of the coil end portion is caused by long-time overlapping stacking, hoisting, transportation and the self-weight of the coil end portion. If the deformed coil is embedded in the stator slot, the position of the end lead wire head cannot meet the design requirements. For a long time, workers bind the coil end portion according to their feelings during embedding, and the lead wire heads of the upper and lower layer coils are often misaligned, so that the strip coil end head welding straight, inclined and head sleeve and the sleeve straight, inclined insulation box cannot be in place, and the product quality cannot meet the requirements. UTILITY MODEL CONTENTS

[0005] The utility model discloses a strip coil lower layer lead wire alignment tool, which solves the technical problem of misalignment of the lower layer lead wire head of the strip coil.

[0006] In order to be suitable for strip coils of different sizes, the bottom of the alignment block is provided with a detachable coil positioning block.

[0007] Preferably, the bottom of the alignment block is provided with a connecting groove, and the coil positioning block can be inserted into the connecting groove.

[0008] In order to be suitable for different size stator core slots, the side of the correction straight plate is detachably provided with a widening strip, which increases the width of the correction straight plate.

[0009] In order to facilitate replacement of the widening strip, the side of the correction straight plate is provided with a widening groove, the widening strip is inserted into the widening groove, and the widening strip protrudes from the side of the correction straight plate.

[0010] Preferably, the widening strip is bonded to the side of the correction straight plate.

[0011] In order to improve positioning accuracy and avoid left and right looseness of the correction straight plate, two widening grooves and widening strips are arranged on the side of the correction straight plate.

[0012] In order to avoid positioning inaccuracy caused by the gap between the upper and lower coils, a positioning support plate is arranged below the correction straight plate, and the size of the positioning support plate is the size of the gap between the upper and lower coils.

[0013] The utility model has the following beneficial effects:

[0014] 1, the utility model discloses a correction strip formula coil lower layer coil end portion's lead head reaches accurate position, and the position of strip formula coil outlet segment is guaranteed after the positioning of lower layer coil's lead head, and the centripetal effect is very good, and the offline quality is greatly improved, and reliable guarantee is provided for the subsequent welding straight, inclined and head cover and the sleeve into straight, inclined insulation box, and the internal quality and appearance are greatly improved.

[0015] 2, the utility model discloses simple whole structure, and the versatility is strong, is applicable to different size strip formula coil and stator core slot, and the production cost is low, and simple and convenient to use. DRAWINGS

[0016] Figure 1 It is the schematic diagram of strip formula coil;

[0017] Figure 2 It is the side view of Figure 1 .

[0018] Figure 3 It is the schematic diagram of strip formula coil lower layer lead position correction tool embodiment of the utility model;

[0019] Figure 4 It is the schematic diagram of correction straight plate and position correction block;

[0020] Figure 5 It is the side view of Figure 4 .

[0021] Figure 6 It is the top view of Figure 5 .

[0022] Figure 7 This is a schematic diagram illustrating the use of the strip coil lower layer lead alignment tool of this utility model;

[0023] Figure 8 This is a schematic diagram illustrating the use of the strip coil lower lead alignment tool of this utility model. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The reference numerals in the accompanying drawings include: 1. Straightening plate; 2. Positioning block; 3. Stator core slot; 4. Lower coil; 5. Lead end; 6. Connecting slot; 7. Coil positioning block; 8. Widening slot; 9. Widening strip; 10. Positioning support plate; 11. Strip coil; 12. Straight segment; 13. Upper coil; 14. Stator core.

[0026] Example 1

[0027] like Figures 1-8 As shown, a strip coil lower lead alignment tool includes a straight alignment plate 1 and an alignment block 2. The alignment block 2 is vertically connected to the bottom of one end of the straight alignment plate 1. The straight alignment plate 1 is used to be embedded in the stator core slot 3. The end of the alignment block 2 is used to position the lead head 5 of the lower coil 4.

[0028] The bottom of the alignment block 2 is provided with a detachable coil positioning block 7, and the bottom of the alignment block 2 is provided with a connecting groove 6, into which the coil positioning block 7 can be inserted.

[0029] The straightening plate 1 has two widening slots 8 and two widening strips 9 on the same side. The widening strips 9 are inserted into the widening slots 8 and protrude from the side of the straightening plate 1. The protruding part is used to widen the width of the straightening plate 1 to accommodate different stator core slots 3. Of course, the widening strips 9 can also be glued to the side of the straightening plate 1.

[0030] A positioning support plate 10 is provided below the straightening plate 1. The size of the positioning support plate 10 is the gap size between the upper and lower coils 4, in order to avoid inaccurate positioning caused by the gap between the upper and lower coils 4.

[0031] The method is used to firstly sink the lower coil 4 of the bar coil 11 into the stator core slot 3, then embed the positioning support plate 10 into the stator core slot 3, install the positioning tool on the positioning support plate 10, align the end surface of the stator core 14 on the correction straight plate 1 with the positioning line, adjust the position to align the lower coil 4 with the end surface of the stator core 14, move the lower end of the lower coil 4 at this time, align the end surface of the lead head 5 with the D surface of the positioning tool, control the extension of the lower end of the lower coil 4, align the top surface of the lead head 5 with the bottom surface of the positioning block 2, determine the distance from the top surface of the lead head 5 to the center of the generator, and the end lead head 5 of the lower coil 4 is determined to reach the accurate position, then fasten the end of the lower coil 4 with the dacron rope and bind it on the fixed end hoop. The upper end of the lower coil 4 is positioned and bound firmly by using the same method.

[0032] The above is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field and has the ability to apply the conventional experimental means before the date, the ordinary skilled in the art can improve and implement the present scheme under the inspiration of the present application combined with their own ability, some typical known structures or known methods should not be an obstacle for the ordinary skilled in the art to implement the present application. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode in the specification can be used to explain the content of the claims.

Claims

1. A bar coil lower layer lead alignment tool characterized by, The application relates to a correction straight plate and a position correction block, wherein the position correction block is vertically connected to the side of the correction straight plate, the correction straight plate is embedded into a stator core slot, and the end of the position correction block is used for positioning the lead head of a lower layer coil.

2. The strip coil lower layer lead alignment tool of claim 1, wherein: The bottom of the position correction block is provided with a detachable coil positioning block.

3. The strip coil lower layer lead alignment tool of claim 2, wherein: The bottom of the position correction block is provided with a connecting groove, and the coil positioning block is inserted into the connecting groove.

4. The strip coil lower layer lead alignment tool of claim 3, wherein: The side of the correction straight plate is detachably provided with a widening strip.

5. The bar coil lower layer lead alignment tool of claim 4, wherein: The side of the correction straight plate is provided with a widening groove, the widening strip is inserted into the widening groove, and the widening strip protrudes from the side of the correction straight plate.

6. The bar coil lower layer lead alignment tool of claim 4, wherein: The widening strip is bonded to the side of the correction straight plate.

7. The bar coil lower layer lead alignment tool of claim 5, wherein: The side of the correction straight plate is provided with two widening grooves and widening strips.

8. The strip coil lower leg lead alignment tool of any of claims 1-7, wherein: A positioning support plate is arranged below the correction straight plate, and the size of the positioning support plate is the size of the gap between upper and lower layer coils.

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