CN109712802B - Penetrating chain type binding method for cake-shaped coil - Google Patents
Penetrating chain type binding method for cake-shaped coil Download PDFInfo
- Publication number
- CN109712802B CN109712802B CN201910121345.5A CN201910121345A CN109712802B CN 109712802 B CN109712802 B CN 109712802B CN 201910121345 A CN201910121345 A CN 201910121345A CN 109712802 B CN109712802 B CN 109712802B
- Authority
- CN
- China
- Prior art keywords
- coil
- contraction
- band
- cake
- winding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a method for through chain type binding of a cake-shaped coil, wherein a contraction band is pulled out in advance by a length which is several times of the axial height of the coil before the coil is wound, the contraction band is upwards folded to the upper end part of the coil from the lower end part of the coil and is temporarily fixed at a bent part, the coil cake of the coil is wound in sequence, the contraction band of which the inner side is connected with a contraction band coil is pulled out while winding, binding thread holes are reserved until all the coil cakes are wound, the contraction band reserved at the lower part is sequentially penetrated upwards to the contraction band thread holes reserved during winding and is penetrated through the contraction band bent part temporarily fixed before winding, and then the contraction band thread holes reserved during winding are sequentially penetrated downwards; and sequentially tightening the contraction bands connected with the contraction band wire coil from the bottom, rewinding the rest of the contraction bands on the contraction band wire coil, and cutting off the contraction bands from the binding ending part to finish binding. The invention has good stability and strong short-circuit resistance, improves the working efficiency, does not waste the contraction band and saves the cost.
Description
Technical Field
The invention belongs to the technical field of transformer manufacturing, relates to winding and reinforcement of a transformer coil, and particularly relates to a cake-type coil penetrating chain type binding method.
Background
The transformer coil is composed of a conducting wire and an insulating part. The insulating part forms the main insulation and the longitudinal insulation of the coil to form a cooling oil duct; the wire with turn insulation is combined with the insulator according to the design requirement and wound into coils with various structures, such as: pancake coil, cylinder coil.
When the transformer is in operation, the coil is required to be capable of withstanding various overvoltage and overcurrent tests under the condition of long-term continuous use of rated voltage and rated current. Such as operation and lightning overvoltages, over-currents and overvoltages caused by sudden short circuits in the electricity network and the corresponding electromagnetic forces generated, without insulation breakdown, local overheating, deformation or destruction. Therefore, the coil is the most critical cardiac component of the transformer. It should have sufficient dielectric strength, mechanical strength, heat resistance and good heat dissipation conditions, while also having reasonable manufacturability and economy.
The shrink band can produce the shrink deformation after the heating, uses the shrink band to ligature according to certain mode to the cake before the coil toasts, toasts at the coil later stage and finishes, and the shrink band can produce the shrink deformation to the cake of the position that will need to consolidate firmly ties together, when the electromagnetic action effect acts on, can be better prevent that the wire from shifting and warping.
In order to enhance the mechanical strength of the coil, shrink bands are used for chain binding at the positions of the head end, the tail end, the coil head and the like of the coil. Special products, coils may even require through chain tying in the axial direction in order to ensure strength.
In the prior art, the chain type binding of the coil is generally performed after the cake-type coil is wound and pre-pressed and before the mold is lifted, as shown in fig. 1, the chain type binding is a structural schematic diagram of the transformer coil during the binding of the cake-type coil in the prior art. Through the small frock of insulating cardboard finished piece, come out shrink area hook from a and b gap, because the gap is little, and invisible, so the operation degree of difficulty is big, work efficiency is low. At the moment, the cake-shaped coil 1 is already installed on the winding die 3, when the cake-shaped coil is bound in a chain manner, the whole cake needs to be bound in the radial direction, and at least 6-8 cakes need to be bound in the axial direction. The inner diameter side of the coil in the radial direction is tightly attached to the hard paper tube 2 and the winding former 3, and a gap of about 3 mm is reserved between the wire cake in the axial direction. The contraction belt needs to pass through the gaps for binding, so that the operation difficulty is high, and time and labor are wasted; and need cut shrink area one section in advance at every ligature, leave enough surplus to guarantee ligature process convenient operation, the ligature is accomplished, often every position ligature position remains more than 1m long shrink area, and these remaining short shrink areas are difficult to use on follow-up product, produce great waste.
Disclosure of Invention
Aiming at the technical problems of high construction difficulty and much waste of excess materials of a contraction band in the original cake-type coil chain type binding process, the invention provides an improved method. The technical scheme adopted by the invention is as follows:
a method for cake-type coil through-penetrating chain-type binding comprises the steps that before a coil is wound, a contraction band is pulled out in advance by the length which is several times of the axial height of the coil, the contraction band is folded upwards from the lower end of the coil and temporarily fixes a bent part, the coil cake of the coil is wound in sequence, the contraction band, the inner side of which is connected with a contraction band coil, is pulled out outwards while being wound, binding thread holes are reserved until all the coil cakes are wound, the contraction band reserved at the lower part is sequentially penetrated upwards to the contraction band thread holes reserved during winding and penetrates through the temporarily fixed contraction band bent part before winding, and then the contraction band thread holes reserved during winding are sequentially penetrated downwards;
and sequentially tightening the contraction bands connected with the contraction band wire coil from the bottom, winding the rest contraction bands on the contraction band wire coil again after the contraction bands are received from the top, and cutting off the contraction bands from the binding ending part to finish binding. The method specifically comprises the following steps:
and 5, tightening the rest of the contraction band once to finish binding.
Preferably, during the winding in step 2, care is taken that the inner shrink band is between the stay and the cake and that the shrink band cannot be pressed.
Preferably, any one of the reserved shrink tape threading holes in the winding process cannot be lost in the threading process in the step 3.
The invention has the beneficial effects that:
1. the original binding method is changed, the contraction band can completely penetrate through the wire cake during binding, and the wire cake is tightened after winding is finished, so that the wire cake is bound into a whole, and the wire cake binding device is good in stability and strong in short circuit resistance.
2. The whole contraction band is reserved in the coil according to the binding requirement in advance, so that the working process is optimized, and the working efficiency is improved.
3. During winding, the shrinkage belt is pulled out without manual hooking, so that time is saved, and winding efficiency is improved.
4. Because the used whole contraction band is not cut off after being tightened, the surplus can be withdrawn onto the whole contraction band wire coil, the contraction band is not wasted, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a transformer coil structure during cake-type coil binding in the prior art;
FIG. 2 is a schematic view of the shrink tape structure of step 1 of an embodiment of the present invention;
FIG. 3 is a schematic view of the shrink tape structure of step 2 of an embodiment of the present invention;
FIG. 4 is a schematic view of the shrink tape structure of step 3 of an embodiment of the present invention;
FIG. 5 is a schematic view of the shrink tape structure of step 4 of an embodiment of the present invention;
in the figure, 1-cake type coil, 2-hard paper cylinder, 3-winding former, 4-contraction band wire coil and 5-contraction band, a is the distance between the wire cake and the hard paper cylinder, and b is the distance between the wire cake and the wire cake.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
A method for cake-shaped coil penetrating chain type binding comprises the following steps:
And 2, winding a coil No. 1 cake (namely a first cake), temporarily shortening the residual shrinkage band 5 with the length of two times reserved after the shrinkage band 5 penetrates out from the lower part of the No. 1 cake, dragging the shrinkage band 5 which is close to the innermost side of the winding mold and is connected with a shrinkage band wire coil 4, rotating the shrinkage band wire coil 4 to lengthen the shrinkage band 5, placing the double-folded shrinkage band on the upper part of the No. 1 cake, and reserving a threading hole. And continuously winding the coil, repeatedly dragging the contraction band 5 which is connected with the contraction band coil disk 4 at the innermost side once the coil is wound, bending the contraction band above the coil, reserving a thread hole, repeating the process until all the coil is wound according to the drawing requirements, and paying attention to the fact that the contraction band 5 cannot be squeezed between the stay and the coil when the inner contraction band 5 is wound. The rest of the middle wire cakes need to be pulled out except that the upper part of the last cake 1 needing to be bound does not need to be pulled out. Fig. 3 is a schematic diagram of a shrink band structure in step 2 according to an embodiment of the present invention.
And 3, sequentially penetrating a contraction band 5 with the length of twice reserved at the lower part from the lower part of the first cake to a contraction band threading hole reserved during winding upwards, penetrating through the last threading hole at the upper part, penetrating through the upper part of the coil cake, penetrating through a contraction band bending part temporarily fixed at the upper end part of the coil before winding, returning from the upper part of the coil cake, sequentially penetrating downwards through the contraction band threading hole reserved during winding again until penetrating through the threading hole at the lowest part. When the two parts are penetrated, any reserved contraction belt threading hole during winding cannot be lost. Fig. 4 is a schematic diagram of the structure of the shrink tape in step 3 according to an embodiment of the present invention.
Whole coil generally can all exceed 10 cakes, and the sketch map does not draw all line cakes according to the drawing, to the many coils of needs ligature line cake number, the shrink area of the last cut ending of general condition is worn 10 cakes from the through wires hole and is pulled tightly the wire-outlet, and the fixed effect of end of a thread can be better a little. For better visualization, the embodiment of the invention is illustrated as a threading method through 4 line cakes. Fig. 5 is a schematic diagram of the structure of the shrink tape in step 4 according to an embodiment of the present invention.
And 5, tightening the rest of the contraction band once according to the method to finish the binding.
Each box in the figure represents a cross section of one wire, and a general pancake coil is formed by a plurality of wires in the horizontal direction, and the wires on the same layer form a wire cake. Seen in cross-section as if the individual tortillas were stacked. The purpose of chain ligature is exactly to consolidate radial wire and the relative position of wire, guarantees under the effect of electromagnetic force that the wire can not collapse from the primary importance, and the relative position keeps unchangeable to guaranteed everywhere insulating distance unchangeable, can not cause because of the distance is got closer and is caused discharge.
The method of the invention can also be adapted to spiral coils, other types of coils, and similar structures can also be adopted if necessary, and such simple and flexible embodiments are included in the protection scope of the invention.
The above examples are only for illustrating the technical solutions and technical features of the present invention, and it should be understood that, for those skilled in the art, modifications or changes to other coil binding methods can be made according to the above descriptions without departing from the technical principles of the present invention, and such modifications or changes should fall within the protection scope of the present invention.
Claims (3)
1. A method for cake-type coil through-penetrating chain-type binding is characterized in that a contraction band is pulled out in advance by the length which is several times of the axial height of a coil before the coil is wound, the contraction band is folded upwards from the lower end part of the coil and temporarily fixes a bent part, the coil cake of the coil is wound in sequence, the contraction band of which the inner side is connected with a contraction band coil is pulled out while winding, binding thread holes are reserved until all the coil cakes are wound, the contraction band reserved at the lower part sequentially penetrates upwards to the contraction band thread holes reserved during winding and penetrates through the contraction band bent part temporarily fixed before winding, and then sequentially penetrates downwards through the contraction band thread holes reserved during winding;
sequentially tightening the contraction bands connected with the contraction band wire coil from the bottom, winding the rest of the contraction bands on the contraction band wire coil again after the contraction bands are taken up from the top, and cutting off the contraction bands from the binding ending part to finish binding;
the method specifically comprises the following steps:
step 1, before winding a coil, hanging a multi-coil contraction belt coil plate on a coil mould in advance according to the requirement of the number of binding lanes of a drawing, drawing the contraction belt by a length which is four times of the axial height of the coil, bending the contraction belt which is drooped at the innermost side close to a winding mould to the upper end part of the coil at the lower end part of the coil, bending the contraction belt to the lower end part of the coil downwards, temporarily fixing the bending point at the upper end part of the coil, and temporarily shortening the residual double length by naturally drooping;
step 2, winding a coil first cake, and temporarily shortening the remaining shrinkage band with the length twice that of the first cake after the shrinkage band penetrates out of the lower part of the first cake; dragging a contraction belt which is close to the innermost side of the winding mold and is connected with a contraction belt line disc, rotating the contraction belt line disc to lengthen the contraction belt, placing the double-folded contraction belt on the upper part of the first cake, and reserving a threading hole; continuously winding the coil cakes, repeatedly dragging the contraction band which is connected with the contraction band coil at the innermost side when one coil is wound, bending the upper part of the coil cake, reserving a threading hole, and repeating the steps until all the coil cakes are wound according to the requirements of the drawing;
step 3, sequentially enabling the contraction band with the length of twice reserved at the lower part to upwards penetrate through the reserved contraction band threading holes in the winding process from the lower part of the first cake, penetrate through the last threading hole in the upper part, penetrate through the upper part of the coil cake, penetrate through the temporarily fixed contraction band bending part at the upper end part of the coil before the winding process, return from the upper part of the coil cake, sequentially downwards penetrate through the reserved contraction band threading holes in the winding process again until the contraction band threading holes at the lowest part penetrate through the threading holes;
step 4, sequentially tightening the contraction bands of the threading holes from the lower part of the coil until the last threading hole is tightened; reserving too long a contracted band after the contraction is tightened when 4-10 cakes are remained on the upper part, sequentially transferring the contracted band from the 4 th to the 10 th to the last cake, withdrawing the redundant contracted band into a contracted band wire coil, reserving a length slightly longer than the axial height of 4-10 cakes, cutting the contracted band to penetrate into the contracted band of the remained 4-10 cakes, and tightening the remained 4-10 cakes to finish binding; if the number of the wire cakes to be bound is less than 4, cutting off the contraction band, directly passing through all reserved wire holes downwards, and gradually tightening the wire holes to complete binding;
and 5, tightening the rest of the contraction band once to finish binding.
2. The method of claim 1 wherein the step 2 of winding is performed with care that the inner shrink band is between the stay and the cake and the inner shrink band is not pinched.
3. The method for cake-shaped coil through chain type binding according to claim 2, wherein any one of the reserved shrink band threading holes in the winding process cannot be lost in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910121345.5A CN109712802B (en) | 2019-02-19 | 2019-02-19 | Penetrating chain type binding method for cake-shaped coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910121345.5A CN109712802B (en) | 2019-02-19 | 2019-02-19 | Penetrating chain type binding method for cake-shaped coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109712802A CN109712802A (en) | 2019-05-03 |
| CN109712802B true CN109712802B (en) | 2020-12-22 |
Family
ID=66264447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910121345.5A Active CN109712802B (en) | 2019-02-19 | 2019-02-19 | Penetrating chain type binding method for cake-shaped coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109712802B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3760315A (en) * | 1970-12-07 | 1973-09-18 | Bbc Brown Boveri & Cie | Electrical coil with spacing bands |
| US3796237A (en) * | 1971-09-14 | 1974-03-12 | Opti Holding Ag | Tape-supported slide-fastener and method of making same |
| CN102158020A (en) * | 2011-04-18 | 2011-08-17 | 重庆德马变频电机研发制造有限公司 | Binding technology for mush winding motor end part |
| CN102170207A (en) * | 2011-05-05 | 2011-08-31 | 湘潭电机股份有限公司 | Method for lashing end of stator coil of three-phase asynchronous motor |
| CN103474230A (en) * | 2013-09-06 | 2013-12-25 | 合肥鑫伟电力设备有限公司 | Sectional cylindrical coil winding process |
| CN105957709A (en) * | 2016-07-19 | 2016-09-21 | 中变集团上海变压器有限公司 | Winding method for oval multi-layer coil of transformer |
| CN106205979A (en) * | 2016-08-26 | 2016-12-07 | 吴江变压器有限公司 | A kind of Transformer Winding lifts one's head binding structure |
| CN107887154A (en) * | 2016-09-30 | 2018-04-06 | 特变电工沈阳变压器集团有限公司 | A kind of transformer spiral winding coiling technology for binding |
-
2019
- 2019-02-19 CN CN201910121345.5A patent/CN109712802B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3760315A (en) * | 1970-12-07 | 1973-09-18 | Bbc Brown Boveri & Cie | Electrical coil with spacing bands |
| US3796237A (en) * | 1971-09-14 | 1974-03-12 | Opti Holding Ag | Tape-supported slide-fastener and method of making same |
| CN102158020A (en) * | 2011-04-18 | 2011-08-17 | 重庆德马变频电机研发制造有限公司 | Binding technology for mush winding motor end part |
| CN102170207A (en) * | 2011-05-05 | 2011-08-31 | 湘潭电机股份有限公司 | Method for lashing end of stator coil of three-phase asynchronous motor |
| CN103474230A (en) * | 2013-09-06 | 2013-12-25 | 合肥鑫伟电力设备有限公司 | Sectional cylindrical coil winding process |
| CN105957709A (en) * | 2016-07-19 | 2016-09-21 | 中变集团上海变压器有限公司 | Winding method for oval multi-layer coil of transformer |
| CN106205979A (en) * | 2016-08-26 | 2016-12-07 | 吴江变压器有限公司 | A kind of Transformer Winding lifts one's head binding structure |
| CN107887154A (en) * | 2016-09-30 | 2018-04-06 | 特变电工沈阳变压器集团有限公司 | A kind of transformer spiral winding coiling technology for binding |
Non-Patent Citations (1)
| Title |
|---|
| 电机绕线转子铁心表面无纬带的绑扎;杨青;《电机与控制应用》;20111231(第10期);第47-50页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109712802A (en) | 2019-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109712802B (en) | Penetrating chain type binding method for cake-shaped coil | |
| CN101226819A (en) | Method for coiling iron-core transformer winding using cuprum aluminum composite conductor and winding thereof | |
| US3928832A (en) | Transformer winding with helically wound layers of a tape-like conductor | |
| US2166841A (en) | Coil | |
| CN209471817U (en) | A kind of inexpensive resistance to shorting loop construction of transformer | |
| CN101388278A (en) | Three-phase oil immersion electric power transformer | |
| CN201215757Y (en) | Three-phase oil immersion electric power transformer | |
| CN201112083Y (en) | Iron-core transformer winding | |
| RU200839U1 (en) | High-frequency minelayer reactor | |
| JP2000012346A (en) | Insulation structure of transformer coil | |
| RU2721375C1 (en) | High-frequency hailer reactor | |
| CN204242779U (en) | A kind of bifilar helix ring type transformer | |
| CN208385126U (en) | Transformer and coil block | |
| CN203481012U (en) | Novel coil tapping joint of 10kV oil-immersed-type power transformer | |
| CN209418169U (en) | The conducting wire of for transformer winding and a kind of transformer | |
| JP2760687B2 (en) | Litz wire and its manufacturing method | |
| JPH097852A (en) | Winding for transformer use and winding thereof | |
| CN210837425U (en) | Foil-strip type low-voltage double-split winding transformer | |
| RU2065631C1 (en) | Transformer and its manufacturing process | |
| US6709615B2 (en) | Method of manufacturing a comb for winding coils of a disk wound transformer | |
| CN205959745U (en) | Transformer winding odd ligature structure | |
| CN110660575B (en) | Coil outer stay binding method | |
| CN212230219U (en) | Cake-type coil capable of eliminating local bulge and reducing insulation distance | |
| CN108847331A (en) | A kind of transformer and coil block | |
| CN212084677U (en) | Seven-core aluminum transposition electromagnetic wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |