CN86102072A - Make the method for molded winding - Google Patents

Abstract

A kind of method made from the molded winding of thermosetting resin.This method is used the coiling cylinder that a kind of that freely is changed by a plurality of circumferential sizes that can make tube, work radially forms with a bar of arranged in co-axial alignment and is wrapped in thin slice on the tube and removably affixed with the external cylindrical surface of tube.Making die joint on the outer surface of thin slice handles.Again insulator and electric conductor alternately are wrapped in by the predetermined number of plies on the outer cylinder surface of thin slice to form winding.Thermosetting resin is poured in the winding of such formation, again winding is done as a whole the heating so that hardening of resin, thereby obtain the winding of a solid resin moulded moulding.

Description

Make the method for molded winding

The present invention relates to a kind of method of making molded winding, this molded winding is used for electric induction equipment such as transformer, reactor, static.

Up to this point, in method known, that be used for making resin moulded moulding winding, lead such as aluminum steel and copper cash and insulating material be alternately be wrapped in as on the cylindrical barrel of line core assembly so that make winding assembly, then thermosetting resin is poured in the Manufactured winding assembly.Then, the heating winding assembly is made resin moulded moulding winding so that make hardening of resin.This known method uses the cylindrical metal mould as above-mentioned coiling cylinder.This metal die is to be made of the die blade of making according to the fixed dimension of internal diameter that will seek out and length, and fits together by seal member.Then one pair of wooden model is inserted in the chamber of metal die.This wooden mold has the outer peripheral face of taper, thereby they can be separated with metal die easily.This metal die is pulled on the driving shaft of coil winding machine by its wooden model.

Yet this known method involves a problem, promptly makes the molded winding of different size and need prepare the metal die of different size and wooden model.So not only can increase the mould of making different size and the cost of model, but also need do the management work such as a lot of moulds and model are preserved and taken care of.In addition, when the size of the winding that will make changes, with regard to a large amount of labour and time assembly jig and the models of needsization.Thereby, before the actual making of setting about winding, need a very long time.

In publication number is 5848/1970 Japan Patent, a kind of method has been proposed, in this method, in order to reduce the quantity of making the required mould of molded winding,

The external insulation part of winding uses as the mould of casting resin.Yet this known method is not to the in addition any consideration of the quantity that reduces the mould that constitutes the coiling cylinder.

Therefore, the purpose of this invention is to provide a kind of method of making molded winding, in this method, reduced and prepared the coiling cylinder and make needed labour of winding and time, thereby improved the production efficiency of molded winding.

For this purpose, the invention provides a kind of method of making molded winding, in this method, lead and at least one insulator are wrapped on the columniform coiling cylinder with the predetermined number of plies, then thermosetting resin is poured in conductor layer and the insulating barrier, by heating it is solidified again, thereby make the molded winding of hard, feature of the present invention comprises the steps:

Prepare a general coiling cylinder with a plurality of bars, this tube bar is disposed in a kind of mode that makes the coiling drum have variable circumferential size, more this general cylinder is installed with predetermined circumferential size;

Then, an elastic sheet looping on general coiling cylinder, removably is fixed on this thin slice on the coiling cylinder again;

Outer surface at the thin slice of looping on general coiling cylinder carries out the die joint processing; Then;

Insulator and lead alternately are wrapped on the outer cylinder surface of thin slice from level to level, make molded winding in view of the above.

According to this method, the circumferential size of coiling cylinder can freely be adjusted, and thin slice is dismountable with being connected of cylinder that wind the line, thereby can make the winding fuse that has molded required continuous outer cylinder surface like a dream.In addition, can unload and make winding and thin slice to separate with thin slice from the coiling cylinder winding easily.

After in conjunction with the accompanying drawings most preferred embodiment being carried out following description, of the present invention above-mentioned and

Other purposes, feature and advantage will become more obvious.

Fig. 1 and Fig. 2 are respectively the front view and the end views of coiling cylinder, and the winding on the coiling cylinder is made according to method of the present invention;

Fig. 3 is the end view of the general coiling cylinder that adopted among the embodiment represented among Fig. 1;

Fig. 4 and Fig. 5 are the partial side view and the front views of the winding made of another embodiment according to method of the present invention;

Fig. 6 is the end view according to a part section of the molded winding of embodiment represented among Fig. 4 and Fig. 5;

Fig. 7 and Fig. 8 are the profiles of the different winding that can make according to method of the present invention;

Fig. 9 is the perspective view that is used for the lead of the represented winding of Fig. 8.

Fig. 1 and Fig. 2 represent the winding made at the coiling cylinder according to embodying method of the present invention. In the step of the manufacture method of illustrated this winding, make an inner insulating layer [21] on the face of cylinder of general coiling cylinder [1] earlier, then a winding [22] is become to be wrapped on this layer inner insulating layer [21] spiral yarn shapedly. As will be appreciated that by following description, general coiling cylinder is to consist of in the mode that a kind of permission is adjusted the circumferential size of coiling cylinder, thin slice [2] looping upward and with it is fixed at coiling cylinder [1], thereby can make the coiling cylinder have continuous external peripheral surface.

This general coiling cylinder [1] has and is suitable for the central shaft [10] that the driving shaft (not shown) with coil winding machine couples, and has radially a plurality of and be configured in coaxially central shaft [10] tube bar [12] on every side. Size according to the diameter of the winding that will make is done suitably to select to the quantity of these bars [12], and these bars are joined

Put in order to form the external cylindrical surface of coiling cylinder [1]. As will be appreciated that by the Fig. 3 that represents coiling cylinder formation details, this central shaft [10] has threaded portion [11] on certain axial length, have a slide block [14] to slide in the above, the handle [13] that engages with threaded portion [11] can move along the axle of central shaft [10] when rotating. Slide block [14] is connected with handle [13] in order to slide block can be slidably reciprocated along central shaft along with the rotation of handle [13]. Each root tube bar is by connecting rod [15], and [16] and [17] are connected on the central shaft [10]. These connecting rods [15], [16] be connected with support component on being fixed on central shaft [10] with the support component at the two ends of slide block [14] respectively on separately end pivoting formula ground with [17], and be connected with the two ends of each bar [12] pivotally at the other end separately. Assembling to connecting rod is such, and namely when handle [13] rotated, slide bar [14] moved relative to central shaft [10], thereby makes a bar [12] by connecting rod [15], and [16] and [17] move radially, and changes accordingly the circumferential size of coiling cylinder [1]. General coiling cylinder and the structure of coil winding machine can be to be that the disclosed coiling cylinder of the specification of 4061,289 United States Patent (USP) is identical with coil winding machine with the patent No., and this patent has transferred the application's applicant. Therefore, in order to make description for simplicity, omitted in this article and related to further describing of coiling cylinder and coil winding machine.

State that as top the external cylindrical surface of general coiling cylinder [1] is to be limited by a plurality of tube bars [12] of separately being settled in a circumferential direction. Therefore, except the situation that the tube bar is arranged to minimum barrel dliameter, between adjacent cartridges bar [12], all leave certain circumference space, this can cause that the resin that is liquefied by heating flows to the coiling cylinder by the space in molded process, this is nonconforming, therefore, obviously just can not directly carry out molded operation at the coiling cylinder. At the insulating materials such as glass fibre that adopts the pre-soaked mistake of thermosetting resin as pre impregnated material

The time, the direct lead on general coiling cylinder and can make winding have polygonal cross section through the insulating materials of pre-preg. So also can make preimpregnation material hang down into space between the bar, and cause insulating with low quality. For this reason, according to the present invention a kind of thin slice looping with suitable hardness is consisted of dismountable being fixedly connected with on general reel and with reel, so just formed a kind of fuse with continuous outer cylinder surface.

In the present embodiment, thin slice [2] is to make according to the size that is enough to topped coiling cylinder [1], thin slice [2] looping diameter according to the coiling cylinder [1] of the diameter of the winding that will make configuration around, then in the end fixed mode with thin slice [2] thin slice removably is fixed up such as a kind of heat-resisting resin bonding band (referring to Fig. 1) by employing again. After this, process by applying a kind of parting compound such as the outer cylinder surface to thin slice [2] and making winding carry out suitable somatotype with a kind of die joint film. This thin slice [2] should have suitable hardness, because excessive hardness can make the end resilience of thin slice, thus the smooth surface of infringement cylindrical core, same, too little hardness can not provide core rod needed intensity. Therefore, this thin slice is preferably made with the stainless steel of 0.2 to 1.0 millimeter thickness or the thin slice that contains the polymerization insulating materials of tetrafluoroethene compound film. For consideration economically, can suitably use heat-resisting insulation resin pressboard, are significantly equivalent other materials but also can adopt those professionals to the art.

To describe carrying out part in the method for making winding with the coiling core that mode was provided of foregoing description below.

As the first step, with a kind of preimpregnation material of partial coagulation, namely a kind of by glass fibre or by the band looping of epoxy resin impregnated mistake on thin slice [2], meanwhile, power by the coil winding machine (not shown) makes the rotation of coiling cylinder, can be made into thus the inner insulating layer [21] of predetermined thickness. Secondly, on predetermined axial region and with predetermined

The number of plies twines to form a winding to lead [22]. Between the adjacent layer of lead [22] is inferior, lay at least the interlayer insulating film of one deck such as insulating paper, its objective is for isolation that the induced voltage between the adjacent conductor layer is insulated. Again, make an external insulation layer according to the mode identical with making inner insulating layer [21] at the outer surface of coil.

Then, top made winding is put in the drying oven together with coiling cylinder [1], and according to suitable method it is heated. As the result of heating, interlayer insulating film is dried, consist of internal layer and outer insulation originally the thermoset resin of part substantially solidified fully. Thereby the inside and outside face of cylinder of winding is fixed. The internal layer that solidifies, outer insulation are used as the mould of casting resin, and the thermosetting resin that will be sticking shape is inserted two axial port of winding. Then, make as a whole winding and again be put in the drying oven heating in order to carry out solidifying of second stage, in this course, resin and internal layer, outer insulation and interlayer insulating film in two axial port of winding are bonding, thereby have made a complete molded winding. After the solidifying of second stage, general coiling cylinder [1] is made radial contraction, and from by deviating from the made cylinder of thin slice [2]. Then, throw off the end [3] of thin slice [2], and thin slice [2] is made radial contraction, thereby it is separated with molded winding. Can carry out easily this separation by means of processing at the die joint on the surface of thin slice [2].

In described embodiment, when winding also is fixed on the coiling cylinder [1], carry out first and second stages to hardening of resin. Yet this way is not unique, and solidifying also of second stage can be carried out after winding is unloaded from the coiling cylinder again. In the later case, after the outside that makes winding by solidifying of phase I and inner circular cylinder are fixing, with a kind of with the similar mode of top described mode winding disengagement from coiling cylinder [1] and thin slice [2]. The heat that then will be sticking shape

Thermosetting resin is filled into two axial ends of the winding that has disassembled, and winding is heated in order to thermosetting resin is solidified again. This improved method is compared with the embodiment that has described, can the more convenient two ends that the thermosetting sticky matter are filled into winding.

In the foregoing embodiments, inside and outside insulating barrier is made by preimpregnation material. Yet this way is not unique, and for the mode of again thermosetting resin being inserted after making at winding, the present invention is suitable for too. Indicated as Fig. 4, in this mode, winding [30] is fabricated on the coiling cylinder according to the mode of aforesaid embodiment, and this winding has an inner insulation layer [31], conductor layer [32], interlayer insulating film [35] and outer insulation [34]. The insulator of the insulating effect that one of reference number [35] expression guarantees to reach satisfied between each layer of lead at two axial end places of lead. Therefore, each overhang insulation layer has filled up the space between the end of insulating barrier between adjacent two layers, and this interlayer insulating film is designed to slightly exceed the axial end of conductor layer [32]. After winding [30] was made, the coiling cylinder was made radial contraction, then deviate from from the cylindrical inner chamber that is made of thin slice [2], but thin slice [2] is because having rebound performance, so still keep in touch with winding. Secondly, support component [5] and [6] are put in the chamber of thin slice [2] in order to it is propped up thin slice [2]. Again secondly,, press among Fig. 6 representedly, end formed plate [7] is placed on two axial end touching positions with winding [30], and with connecting rod [8] they is fixed. Then, thermosetting resin [9] is inserted in the winding [30] between the end formed plate [7], simultaneously, thin slice [2] is used as molded fuse. Make hardening of resin by heating again. Thereby, by inserting the mode of thermosetting resin after making at winding [30], also can utilize method of the present invention to make molded winding.

Although as long as the winding size is smaller, do not use end forming board [7] can make yet

Must reach gratifying degree with resin bonding, but had better aforesaid, utilize preimpregnation material also to adopt this end formed parts [7] in as the embodiment of inside and outside insulating barrier.

Fig. 7 and Fig. 8 represent the molded structure that can make with method provided by the present invention. The structure that represented molded winding [40] has among Fig. 7 basically structure with the winding of being described in conjunction with Fig. 4 [30] is identical, that is to say, this structure is by inner insulation layer [41], conductor layer [42], interlayer insulating film [43], outer insulation [44] and overhang insulation layer [45] consist of. Yet winding [40] and winding [30] are distinguishing, and in winding [40], conductor layer [42] is thread by leading of the cross section with flat pattern.

On the other hand, the structure that represented lead has among Fig. 8 is: it is by inner insulation layer [51], conductor layer [52], and insulator [53] and [54] and outer insulator [55] consisted of between layer was interior. In this mode, conductor layer [52] also is thread by leading of the cross section with flat pattern. Yet the structure of represented winding [40] is distinguishing in the arrangement of interlayer insulating film [53], [54] and overhang insulation layer [56] among winding [50] and Fig. 7. In other words, in winding [50], each overhang insulation layer is made of one-sided insulating sticky ligament, and this adhesive tape is by more bonding with a side of conductor layer [52] after folding continuously. This insulating sticky ligament is to add that by the one side to insulating paper suitable binding agent makes. Interlayer insulating film [53] and [54] are made of insulating paper, and this insulating paper has separately enough big width and covers this part conductor layer [52] between the end insulating barrier [56], and has the width that equates with conductor layer. This structure of winding [50] is so that the overhang insulation layer of conductor layer is simple for production, and can reduce the processing step of making winding. In addition, can between resin and overhang insulation layer, reach higher dielectric strength, from

And make molded winding more sturdy and durable.

As will be appreciated that by foregoing description, according to method of the present invention, molded winding is by adopting a kind of coiling cylinder and a kind of disconnectable laminar coiling fuse of processing through die joint by changing circumferential size to be made. Therefore, this method has following advantages:

(1). the reel of being regulated by the internal diameter that adopts the winding that a barrel dliameter can be as required and looping thin slice on the coiling cylinder, that be complementary with the size of coiling cylinder, so that might make the molded winding of various sizes. And, can reduce significantly the manufacturing cost of making molded winding.

(2) even if. need to produce the winding of different size, also can shorten needed time before the processing winding. And, can also like a dream winding be disassembled from the coiling cylinder, thereby also just greatly reduce the processing step of making winding.

(3). because can freely dispose the diameter of coiling core, also just obviously enlarged the design freedom of molded winding.

(4) fixed in the mode of winding close contact because of thin slice, so that can be used as the mould fuse, uses thin slice, even so winding is carried out the molded this method after disassembling from the coiling cylinder again, also can obtain a kind of not only closely but also firm winding.

Although the present invention is described by special term, but it should be emphasized that herein, described embodiment is a kind of schematic explanation, might make a variety of changes and improve under the condition that does not break away from the scope of the invention, scope of the present invention is only limited by following claim.

Claims (12)

1, a kind of method of making molded winding, in this method, one lead and at least one insulator are pressed predetermined number of plies looping on columniform coiling cylinder, then thermosetting resin is poured in conductor layer and the insulating barrier, by heating thermosetting resin is solidified again, the invention is characterized in that the step that said method comprises is:

(a) prepare a kind of general coiling cylinder, it has a plurality of bars, and this tube bar is disposed with a kind of method that makes above-mentioned coiling cylinder possess variable circumferential size, and above-mentioned general cylinder can be formed predetermined circumferential size,

(b) resilient thin slice is wrapped in the top of above-mentioned general cylinder and above-mentioned thin slice removably is fixed on the above-mentioned coiling cylinder,

(c) on the outer surface of the above-mentioned thin slice of looping on above-mentioned general coiling cylinder, carry out die joint and handle, and

(d) above-mentioned insulator and above-mentioned lead alternately in layer are wrapped on the cylindrical outer surface of above-mentioned thin slice, thereby make molded winding.

2, according to the method described in the claim 1, it is characterized in that, comprise like this some steps: make inner insulating layer and external insulation layer by twining in advance the insulator of making impregnation process with thermosetting resin, then, after winding finishes, to the heating of the winding on above-mentioned coiling cylinder, thereby above-mentioned internal layer, outer insulation are done solidifying of phase I.

3, according to the method described in the claim 2, it is characterized in that, comprise like this some steps: after the solidifying of above-mentioned phase I, thermosetting resin is filled between the internal layer, outer insulation of above-mentioned winding, then heat, thereby above-mentioned winding is done solidifying of second stage making as a whole above-mentioned winding.

4, according to the method described in the claim 2, it is characterized in that, comprise some steps like this: after the above-mentioned phase I, make above-mentioned general cylinder make radial contraction, above-mentioned winding is disassembled from above-mentioned general cylinder, then disassemble from thin slice again, thermosetting resin is filled between above-mentioned internal layer in the winding, the outer insulation, to doing as a whole above-mentioned winding heating, above-mentioned winding is done solidifying of second stage again with this.

5, according to the method described in the claim 1, it is characterized in that comprising some steps like this: after the coiling step is finished, above-mentioned coiling cylinder is shunk, then winding is disassembled from above-mentioned general coiling cylinder together with above-mentioned thin slice, thermosetting resin is filled in the above-mentioned winding, again above-mentioned winding is done as a whole the heating, make a solid molded winding with this.

According to the method described in the claim 1, it is characterized in that 6, above-mentioned thin slice is a kind of Thin Stainless Steel steel disc with the thickness between 0.2 millimeter to 1.0 millimeters.

According to the method described in the claim 1, it is characterized in that 7, above-mentioned thin slice is a kind of profiled sheeting that contains the polymerization insulating material of tetrafluoroethene compound film.

According to the method described in the claim 1, it is characterized in that 8, above-mentioned thin slice is a kind of heat-resisting pressed sheet.

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