Continuous oval coil reverse section winding tool

Abstract

The utility model relates to a continuous oval coil reverse section winding tool which comprises a plurality of layers of oval plate assemblies arranged on the outer sides of supporting strips on an insulating cylinder in a sleeved mode, the widths of all the layers of oval plate assemblies are sequentially increased from top to bottom to form a step shape, and the bottom layer of oval plate assembly located on the lowermost layer is arranged at the upper end of a coil section. The top layer elliptical plate assembly located on the uppermost layer comprises a top layer long-axis arc plate, a top layer short-axis arc plate and a top layer bottom transition arc plate, wherein the top layer long-axis arc plate and the top layer short-axis arc plate are fixedly arranged, and the top layer bottom transition arc plate is movably arranged. The width of the top layer bottom transition arc plate is gradually reduced. According to the utility model, the continuous elliptical coil reverse section can be quickly wound, and the winding quality can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer manufacturing, in particular to a continuous elliptical coil reverse-segment winding tool. Background Art

[0002] In the prior art, the elliptical coil is generally wound in a single spiral structure, and when a high-current spiral coil is wound in parallel with dozens or even hundreds of wires, a "K" transposition method is used between the wires to limit the circulating current. However, this cannot completely eliminate the circulating current in the winding, and the mechanical properties of the "K" transposition part are poor.

[0003] The continuous coil can be used in large-capacity power transformers because of its good mechanical properties, but its winding method is different from that of the spiral winding. The continuous winding is composed of two adjacent wire segments to form a unit, and the two adjacent segments are commonly known as "reverse segment" and "positive segment". The "positive segment" is the wire wound from the inner diameter side of the winding to the outer diameter side. Its winding is relatively simple. Usually, as the machine tool rotates, the employee can hold the wire to complete it. The "reverse segment" is the wire wound from the outer diameter side of the winding to the inner diameter side of the winding. It cannot be completed directly by rotating the machine tool. Generally, a temporary coil must be wound, and then the positive segment is turned into a reverse segment by turning the wire. However, the reverse segment winding of the coil in the prior art is mainly for conventional circular coil structures, and the continuous elliptical coil reverse segment winding method is still under further exploration.

[0004] The Chinese invention patent with the authorization announcement number CN105957709B discloses a method for winding a transformer elliptical multilayer coil, which first bends the start of the wire to 90 degrees, then sparsely wraps and ties the end insulation tape made of cardboard strips on the first turn of the wire, then puts the start into the notch of the baffle of the winding mold, and temporarily fixes the start on the winding mold with a shrink tape; winds the first turn of the innermost turn of the wire, while winding, evenly place 4 to 6 tensioning tapes along the circumference under the wire, and use the tensioning tape to tie the first turn of the wire and the end insulation together in an eight-shaped binding method, turn the tensioning tape up when winding the second turn of the wire, and turn the tensioning tape down when winding the third turn of the wire, press it under other wires and tighten it. However, this method is mainly for improving the mechanical strength of the coil, and it starts winding from the innermost first turn of the wire, not for reverse winding from outside to inside. Utility Model Content

[0005] The utility model aims to provide a continuous elliptical coil reverse segment winding tool, which can realize the rapid winding of the continuous elliptical coil reverse segment and ensure the winding quality.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A continuous elliptical coil reverse segment winding tool includes multiple layers of elliptical plate components sleeved on the outside of each support bar on an insulating cylinder, and the width of each layer of the elliptical plate components increases from top to bottom to form a stepped shape, wherein the bottom elliptical plate component located at the bottom layer is arranged at the upper end of the coil segment, and the top elliptical plate component located at the top layer includes a fixed top long-axis arc plate and a top short-axis arc plate and a movably arranged top bottom transition arc plate, and the width of the top bottom transition arc plate gradually decreases.

[0008] The bottom elliptical plate assembly comprises bottom long-axis arc plates arranged on both sides of the long axis of the elliptical cross section of the insulating cylinder and bottom short-axis arc plates arranged on both sides of the short axis of the elliptical cross section of the insulating cylinder.

[0009] A plurality of intermediate elliptical plate assemblies are arranged between the top elliptical plate assembly and the bottom elliptical plate assembly, and each intermediate elliptical plate assembly includes intermediate long-axis arc plates arranged on both sides of the long axis of the elliptical cross-section of the insulating cylinder and intermediate short-axis arc plates arranged on both sides of the short axis of the elliptical cross-section of the insulating cylinder.

[0010] The intermediate long-axis arc plates in each layer of the intermediate elliptical plate assembly are stacked and fixed on the corresponding bottom long-axis arc plates in order from bottom to top and from wide to narrow, and the intermediate short-axis arc plates in each layer of the intermediate elliptical plate assembly are stacked and fixed on the corresponding bottom short-axis arc plates in order from bottom to top and from wide to narrow;

[0011] The top-layer long-axis arc plate is fixedly arranged on the corresponding middle long-axis arc plate in the uppermost middle elliptical plate assembly, the top-layer short-axis arc plate is fixedly arranged on the corresponding middle short-axis arc plate in the uppermost middle elliptical plate assembly, and the top-layer bottom-position transition arc plate is movably arranged on the corresponding middle short-axis arc plate in the uppermost middle elliptical plate assembly.

[0012] The radial width dimension M1 of the top-layer major axis arc plate and the top-layer minor axis arc plate is the width dimension of a single wire segment of the coil × the radial number of coil windings; the maximum radial width dimension M1max of the top-layer bottom-position transition arc plate is the width dimension of a single wire segment of the coil × the radial number of coil windings, and the minimum radial width dimension M1min of the top-layer bottom-position transition arc plate is the bottom position of the reverse segment end.

[0013] Each layer of the elliptical plate assembly includes a plurality of arc plates, and gaps S are provided between adjacent arc plates.

[0014] The advantages and positive effects of the utility model are:

[0015] 1. During the winding of the utility model, the conductor can be quickly wound along the outer diameter side of each layer of the elliptical plate assembly of the reverse-segment winding tooling, and the size and specification design of each layer of the elliptical plate assembly can ensure the reverse-segment winding quality.

[0016] 2. The top elliptical plate assembly of the utility model is provided with a movable top bottom transition arc plate with a gradually decreasing width to guide the conductor to transition to the bottom position of the reverse section on the inner diameter side of the coil, and it is also convenient to use the subsequent transposition bending tool to make a bottom "S" bend in the conductor at the bottom position of the reverse section.

[0017] 3. The utility model can design arc plates of elliptical plate components with a series of universal sizes according to the inner and outer diameters and radial specifications of coils of products with different voltage levels, thereby improving the flexibility of use and the scope of application of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the utility model.

[0019] Figure 2 for Figure 1 AA view in

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the middle and bottom elliptical plate components.

[0021] Figure 4 for Figure 1 The schematic diagram of the structure of the first intermediate elliptical plate assembly,

[0022] Figure 5 for Figure 1 The schematic diagram of the structure of the second intermediate elliptical plate assembly,

[0023] Figure 6 for Figure 1 Schematic diagram of the structure of the top elliptical plate assembly.

[0024] Figure 7 The following is a schematic diagram of the size relationship of the elliptical coil to be wound.

[0025] Figure 8 It is a schematic diagram of the use state of the utility model.

[0026] Among them, 1 is the top elliptical plate assembly, 101 is the top bottom transition arc plate, 102 is the top major axis arc plate, 103 is the top minor axis arc plate, 2 is the second intermediate elliptical plate assembly, 201 is the second intermediate major axis arc plate, 202 is the second intermediate minor axis arc plate, 3 is the first intermediate elliptical plate assembly, 301 is the first intermediate major axis arc plate, 302 is the first intermediate minor axis arc plate, 4 is the bottom elliptical plate assembly, 401 is the bottom major axis arc plate, 402 is the bottom minor axis arc plate, 5 is the mounting hole, 6 is the coil segment, 7 is the support bar, 8 is the insulating tube, and 9 is the shrinkage belt. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] like Figures 1 to 8 As shown, the reverse winding tool of the utility model includes a plurality of layers of elliptical plate components which are sleeved on the outer sides of each support bar 7 on the insulating tube 8 and whose width increases from top to bottom to form a stepped shape, wherein Figure 6 As shown, the top elliptical plate assembly 1 located at the top layer includes a fixed top long axis arc plate 102 and a top short axis arc plate 103 and a movable top bottom transition arc plate 101. The two top long axis arc plates 102 are arranged on both sides of the elliptical long axis, and the top bottom transition arc plate 101 is arranged on one side of the elliptical short axis, and the top short axis arc plate 103 is arranged on the other side. The width of the top bottom transition arc plate 101 gradually decreases, and as shown in FIG. Figures 3 to 5 As shown, the remaining layers of elliptical plate components include long-axis arc plates arranged on both sides of the elliptical long axis and short-axis arc plates arranged on both sides of the elliptical short axis.

[0029] like Figures 1 to 8 As shown, the reverse segment winding tool of the present invention includes, in addition to the top elliptical plate assembly 1, a bottom elliptical plate assembly 4 and a multi-layer intermediate elliptical plate assembly, wherein during winding, as shown in FIG. Figure 8 As shown, each support bar 7 on the insulating tube 8 is provided with a coil segment 6 on the outside, and the bottom elliptical plate assembly 4 is provided on the upper end of the coil segment 6. Figure 2 As shown, each layer of the intermediate elliptical plate components are stacked on the bottom layer elliptical plate component 4 in order from bottom to top and from wide to narrow, and the top layer elliptical plate component 1 is arranged on the upper side of the uppermost intermediate elliptical plate component.

[0030] like Figure 3 and Figure 8 As shown, when the reverse winding tooling of the utility model is assembled, the two bottom long-axis arc plates 401 of the bottom elliptical plate assembly 4 are arranged on both sides of the long axis of the elliptical cross section of the insulating tube 8 and are arranged close to the support bar 7, and the two bottom short-axis arc plates 402 of the bottom elliptical plate assembly 4 are arranged on both sides of the short axis of the elliptical cross section of the insulating tube 8 and are arranged close to the support bar 7. The middle long-axis arc plates in the middle elliptical plate assemblies of each layer are stacked and fixed on the corresponding bottom long-axis arc plates in the order from bottom to top and from wide to narrow. 401 and is arranged close to the support bar 7, the intermediate short-axis arc plates in each layer of the intermediate elliptical plate components are stacked in sequence from bottom to top and from wide to narrow and fixed on the corresponding bottom short-axis arc plate 402 and are arranged close to the support bar 7, the top long-axis arc plate 102 in the top elliptical plate component 1 is fixed on the corresponding intermediate long-axis arc plate in the uppermost intermediate elliptical plate component, and the top short-axis arc plate 103 in the top elliptical plate component 1 is fixed on the corresponding intermediate short-axis arc plate in the uppermost intermediate elliptical plate component, and as Figure 1 As shown, the top-bottom transition arc plate 101 is movably arranged on the corresponding middle short-axis arc plate in the uppermost middle elliptical plate assembly.

[0031] like Figures 1 to 8 As shown, in one embodiment of the utility model, the reverse winding tooling group includes a first intermediate elliptical plate assembly 3 (including a first intermediate long-axis arc plate 301 and a first intermediate short-axis arc plate 302) and a second intermediate elliptical plate assembly 2 (including a second intermediate long-axis arc plate 201 and a second intermediate short-axis arc plate 202), and the bottom elliptical plate assembly 4, the first intermediate elliptical plate assembly 3, the second intermediate elliptical plate assembly 2 and the top elliptical plate assembly 1 are stacked from bottom to top. Figure 7 As shown, assuming that the inner diameter of the long axis of the elliptical coil to be wound is a, the outer diameter of the long axis is A, the inner diameter of the short axis is b, and the outer diameter of the short axis is B, then the specific size requirements of each layer of the elliptical plate assembly are as follows:

[0032] like Figure 3 As shown, the overall inner diameter of the bottom elliptical plate component 4 is equal to the inner diameter of the coil, wherein the overall long axis inner diameter of the bottom elliptical plate component 4 is also a, and the overall short axis inner diameter is also b;

[0033] The radial width dimension M4 of each arc plate of the bottom elliptical plate assembly 4 = (width dimension of a single wire segment of the coil × radial number of coil windings) × 4;

[0034] The overall outer diameter of the bottom elliptical plate assembly 4 = the inner diameter of the coil + M4×2, wherein the overall major axis outer diameter A4 of the bottom elliptical plate assembly 4 = a + M4×2, and the overall minor axis B4 = b + M4×2;

[0035] The thickness of each arc plate of the bottom elliptical plate assembly 4 is equal to the height of the coil wire.

[0036] like Figures 4-5 As shown, the inner diameter of the first intermediate elliptical plate assembly 3 and the second intermediate elliptical plate assembly 4 as a whole is also equal to the inner diameter of the coil;

[0037] The radial width dimension M3 of each arc plate of the first intermediate elliptical plate assembly 3 = (width dimension of a single wire segment of the coil × radial number of coil windings) × 3; the radial width dimension M2 of each arc plate of the second intermediate elliptical plate assembly 2 = (width dimension of a single wire segment of the coil × radial number of coil windings) × 2;

[0038] The overall outer diameter of the first intermediate elliptical plate assembly 3 = the inner diameter of the coil + M3×2, wherein the overall long axis outer diameter A3 of the first intermediate elliptical plate assembly 3 = a+M3×2, and the overall short axis B3 = b+M3×2; the overall outer diameter of the second intermediate elliptical plate assembly 2 = the inner diameter of the coil + M2×2, wherein the overall long axis outer diameter A2 of the second intermediate elliptical plate assembly 2 = a+M2×2, and the overall short axis B2 = b+M2×2;

[0039] The thickness of each arc plate of the first intermediate elliptical plate assembly 3 and the second intermediate elliptical plate assembly 4 is equal to the height of the coil wire.

[0040] like Figure 6 As shown, the inner diameter of the top elliptical plate assembly 1 as a whole is also equal to the inner diameter of the coil;

[0041] The radial width dimension M1 of the top long-axis arc plate 102 and the top short-axis arc plate 103 of the top elliptical plate assembly 1 = the width dimension of a single wire segment of the coil × the radial number of coil windings;

[0042] The maximum radial width dimension M1max of the top bottom transition arc plate 101 of the top elliptical plate assembly 1 is equal to M1, which is the width dimension of a single wire segment of the coil × the number of radial windings of the coil, and the minimum radial width dimension M1min>2mm;

[0043] The overall outer diameter of the top elliptical plate assembly 1 = the inner diameter of the coil + M1×2, wherein the overall major axis outer diameter of the top elliptical plate assembly 12 is A1 = a + M1×2, and the overall minor axis dimension is B1 = b + M1×2;

[0044] The thickness of each arc plate of the top elliptical plate assembly 1 is equal to the height of the coil wire.

[0045] like Figures 1 to 8 As shown, a gap S is provided between adjacent plates in each layer of the elliptical plate assembly.

[0046] like Figures 1 to 8 As shown, in each layer of the elliptical plate assembly, except for the top layer bottom transition arc plate 101, the arc plates are all provided with mounting holes 5 for connecting the upper and lower plates.

[0047] like Figure 1 As shown, a shrinkage belt 9 is provided at the end of the reverse-segment winding tooling.

[0048] The winding method of the utility model comprises the following steps:

[0049] Step 1: Assemble the reverse winding tooling. Figures 1 to 8 Taking the embodiment shown as an example, during assembly, the arc plates of the bottom elliptical plate assembly 4 are first enclosed into an elliptical shape and mounted on the outside of the struts 7 on the insulating tube 8, and each arc plate is arranged at the upper end of the coil segment 6. Then, the arc plates of the first intermediate elliptical plate assembly 3 are respectively placed on the corresponding arc plates in the bottom elliptical plate assembly 4 and fixed, and then the arc plates of the second intermediate elliptical plate assembly 2 are respectively placed on the corresponding arc plates in the first intermediate elliptical plate assembly 3 and fixed, and finally, the arc plates in the top elliptical plate assembly 1 are placed on the corresponding arc plates in the second intermediate elliptical plate assembly 2, where Figure 3As shown, the top long-axis arc plate 102 and the top short-axis arc plate 103 are fixed, and the top bottom transition arc plate 101 is movably arranged.

[0050] Step 2: When winding the reverse section, the conductor that transitions from the positive section "S" bend is wound from bottom to top in sequence, close to the outer diameter side of each layer of the elliptical plate assembly. When the conductor is wound along any layer of the elliptical plate assembly to the number of 7 struts specified in the drawing, the conductor rises to the outer diameter side of the upper layer of the elliptical plate assembly and continues to be wound. During winding, the conductor is maintained in tension through a conductor output device, thereby ensuring that the conductor is in close contact with the outer diameter side of the elliptical plate assembly. The conductor output device is a well-known technology in the art, such as a conductor reel that uses a motor to drive the wire.

[0051] by Figures 1 to 8 Taking the illustrated embodiment as an example, the conductor transitioning from the positive section "S" bend is first wound close to the outer diameter side of the bottom elliptical plate component 4 to the number of 7 strut spacings specified in the drawing, then rises upward to the outer diameter side of the first intermediate elliptical plate component 3, and is wound close to the outer diameter side of the first intermediate elliptical plate component 3 to the number of 7 strut spacings specified in the drawing, then rises upward to the outer diameter side of the second intermediate elliptical plate component 2, and is wound close to the outer diameter side of the second intermediate elliptical plate component 2 to the number of 7 strut spacings specified in the drawing, and finally rises upward to the outer diameter side of the top elliptical plate component 1, and is wound close to the outer diameter side of the top elliptical plate component 1 to the number of 7 strut spacings specified in the drawing.

[0052] Step three: When the wire is wound to the top-layer bottom transition arc plate 101 position in the top-layer elliptical plate assembly 1, the wire transitions along the top-layer bottom transition arc plate 101 to the reverse-segment bottom position on the inner diameter side of the coil, wherein the top-layer bottom transition arc plate 101 with the minimum radial width dimension M1min is the reverse-segment bottom position, i.e., the bottom "S" bend position.

[0053] Step 4: Use the transposition bending tool to make a bottom "S" bend in the conductor at the bottom position of the reverse section. This is a working technique in this field.

[0054] Step 5: Flip the newly wound coil and remove the reverse segment winding tooling by pulling out the shrink band 9, and then the newly wound coil segment falls freely to form a segment reverse pancake.

[0055] In order to ensure the ovality of the wound coil, all arc plates are processed in one step by a CNC machining center, and the materials used are laminated wood or laminated paperboard.

Claims

1. A continuous elliptical coil reverse winding tool, characterized in that: The invention comprises a plurality of elliptical plate assemblies which are sleeved on the outer sides of the supporting bars (7) on the insulating cylinder (8), and the width of each elliptical plate assembly increases from top to bottom to form a stepped shape, wherein the bottom elliptical plate assembly (4) located at the bottom is arranged at the upper end of the coil segment (6), and the top elliptical plate assembly (1) located at the top comprises a top long-axis arc plate (102) and a top short-axis arc plate (103) which are fixedly arranged, and a top bottom transition arc plate (101) which is movably arranged, and the width of the top bottom transition arc plate (101) gradually decreases.

2. The continuous elliptical coil reverse winding tooling according to claim 1 is characterized in that: The bottom elliptical plate assembly (4) comprises bottom long-axis arc plates (401) arranged on both sides of the long axis of the elliptical cross section of the insulating cylinder (8) and bottom short-axis arc plates (402) arranged on both sides of the short axis of the elliptical cross section of the insulating cylinder (8).

3. The continuous elliptical coil reverse winding tool according to claim 2, characterized in that: A plurality of intermediate elliptical plate assemblies are provided between the top elliptical plate assembly (1) and the bottom elliptical plate assembly (4), and each layer of the intermediate elliptical plate assembly comprises intermediate long-axis arc plates arranged on both sides of the long axis of the elliptical cross section of the insulating cylinder (8) and intermediate short-axis arc plates arranged on both sides of the short axis of the elliptical cross section of the insulating cylinder (8).

4. The continuous elliptical coil reverse winding tool according to claim 3, characterized in that: The intermediate long-axis arc plates in each layer of the intermediate elliptical plate assembly are stacked and fixed on the corresponding bottom long-axis arc plate (401) in order from bottom to top and from wide to narrow, and the intermediate short-axis arc plates in each layer of the intermediate elliptical plate assembly are stacked and fixed on the corresponding bottom short-axis arc plate (402) in order from bottom to top and from wide to narrow; The top long-axis arc plate (102) is fixedly mounted on the corresponding middle long-axis arc plate in the uppermost middle elliptical plate assembly, the top short-axis arc plate (103) is fixedly mounted on the corresponding middle short-axis arc plate in the uppermost middle elliptical plate assembly, and the top bottom transition arc plate (101) is movably mounted on the corresponding middle short-axis arc plate in the uppermost middle elliptical plate assembly.

5. The continuous elliptical coil reverse winding tool according to claim 1, characterized in that: The radial width dimension M1 of the top long-axis arc plate (102) and the top short-axis arc plate (103) is the width dimension of a single wire segment of the coil × the number of radially wound coils; the maximum radial width dimension M1max of the top bottom transition arc plate (101) is the width dimension of a single wire segment of the coil × the number of radially wound coils; the minimum radial width dimension M1min of the top bottom transition arc plate (101) is the bottom position of the reverse segment end.

6. The continuous elliptical coil reverse winding tool according to claim 1, characterized in that: Each layer of the elliptical plate assembly includes a plurality of arc plates, and gaps S are provided between adjacent arc plates.

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