CN1428797A - Method for making oblique end ring of transformer - Google Patents
Method for making oblique end ring of transformer Download PDFInfo
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- CN1428797A CN1428797A CN 01145317 CN01145317A CN1428797A CN 1428797 A CN1428797 A CN 1428797A CN 01145317 CN01145317 CN 01145317 CN 01145317 A CN01145317 A CN 01145317A CN 1428797 A CN1428797 A CN 1428797A
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- insulating board
- transformer
- insulating
- thickness
- end circle
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Abstract
The present invention discloses a method for making skew-coil of transformer. It adopts rivetting method to rivet several layers of insulating paper board and make them into the invented skew-coil, it can de not use insulation paint, at the same time adopts the measures of moistening with water and rolling circle, etc. so that it can use singl-layer large-thickness insulating paper board to make the skew-coil which does not produce creepage, and can greatly reduce local discharge value and can prevent neutral-point discharge.
Description
Method for making oblique end ring of transformer disclosed in this invention belongs to transformer insulated technology field.
Oblique end ring of transformer is the important insulating element of transformer, is enclosed within the two ends of transformer pressure regulation winding during use, its role is to constitute the stayed surface of pressure regulation winding overhang, strengthens the pressure regulation mechanical Strength for Winding, and the while is as the overhang insulation of winding.The splay end circle is an annular opening insulating paper cylinder, it is trapezoidal to launch to be approximately flat square from opening part, trapezoidal upward base and bottom are bent to together, through round as a ball measure, make trapezoidal cardboard bend to tubular, trapezoidal right-angle side constitutes a circular end surface of splay end circle, trapezoidal hypotenuse constitutes another spirality end face, difference according to design, trapezoidal upward base can be smooth the butt joint with the bottom, also can be the superimposed overlap joint of part, and interface is unfixing, can open, be referred to as the opening of splay end circle.
Oblique end ring of transformer thickness is generally more than 6 millimeters, and bonding the forming of insulating board of generally adopting 0.5 to 2 millimeter of multilayer at present for convenience of description, is necessary simply to introduce its traditional handicraft.
At first select the number of plies and every layer thickness of insulating board for use according to the thickness of splay end circle, its thickness should be considered the insulating varnish thickness that brushes in the subsequent technique, select mold according to splay end circle internal diameter then, one side at the insulating board of choosing brushes insulating varnish, and insulating varnish thickness is 0.08 to 0.10 millimeter, natural airing, then according to the blanking of each layer of splay end circle development size, if the splay end circle is to select bonding the forming of n layer insulating board for use, during blanking, the length of run of each layer insulating board is calculated according to following formula:
l
n＝2π(r+δ
1+δ
2+…+δ
n)-A
In the formula, l
nBe n layer length of run,
R is a splay end circle inside radius,
δ
nBe the insulating board thickness of n layer,
A is the width of splay end circle opening.
After the blanking with each layer insulating board successively according to the hand of spiral of splay end circle on mold, the one side direction that makes each layer insulating board be brushed with insulating varnish keeps identical, and after curing processing, insulating varnish makes each layer insulating board glued together, after be organized into type, promptly finish the making of splay end circle.Above method has more detailed description at " transformer fault and repairing " (China Machine Press's publication) chapter 5 the 6th joint.
This method shortcoming is:
1, manufacturing procedure is more loaded down with trivial details, insulating varnish thickness is wayward, and thickness error is big, and the insulating varnish nature airing and the process of curing consume the plenty of time;
2, owing to adopt bonding the forming of multilayer insulation paperboard grade (stock) insulating varnish, insulating varnish easily causes creepage phenomenon attached to splay end circle end face, and the partial discharge of transformer value is increased, and accident increases;
3, the end circle causes thickness direction to shrink through super-dry, adopts between the bonding couch board of insulating varnish and is prone to delamination splitting or bulge phenomenon.
The objective of the invention is to design a kind of new oblique end ring of transformer manufacture craft, simplify procedure, shorten process time, the end face of eliminating the splay end circle is creepage, solves quality problems such as dried delamination splitting and bulge.
The inventive method realizes as follows:
1. select the insulating board number of plies and every layer thickness according to the thickness of splay end circle, and according to the blanking of each layer development size;
2. to the evenly wet water in insulating board two sides;
3. the round as a ball one-tenth insulating paper cylinder of insulating board behind the water will wet;
4. the insulating paper cylinder after round as a ball is wrapped up on mold, and tightened up, and it is dry to put into drying room with belt tensioner;
5. the hand of spiral of dried each layer insulating paper cylinder according to the splay end circle is nested in together, the use clamping device clamps, spiral end face and circular end surface along the splay end circle are evenly punched, in insulated bolt riveting hand-hole, each layer insulating paper cylinder is riveted together, the part on finishing insulated bolt bared end circle surface makes end circle flush.
By above step as can be known, the inventive method does not need to use insulating varnish, thereby avoids the problem of insulating varnish THICKNESS CONTROL difficulty, reduced splay end circle thickness error greatly, and the creepage phenomenon of having avoided insulating varnish to cause, there is not insulating varnish nature airing process simultaneously, saved the plenty of time; Owing to insulating board has been carried out wet water, round as a ball processing, and has adopted riveting process, make that adopting thicker insulating board to make the splay end circle becomes possibility, reduce the insulating board number of plies, can simplify operating process greatly, increase the mechanical strength of splay end circle.
Fig. 1: the expanded view of insulating board blanking
Fig. 2, the simple and easy round as a ball schematic diagram of insulating board
Fig. 3, oblique end ring of transformer riveted joint schematic diagram
With reference to the accompanying drawings and in conjunction with example the present invention is further described below.
1, the oblique end ring of transformer insulating board that is suitable for selecting for use has common insulating board, T4 insulating board or high density insulating board, is the best with the high density insulating board wherein.Because the present invention has adopted the method for riveted joint, should select thick slightly insulating board when therefore selecting materials, and can reduce the cardboard number of plies on the one hand, raise the efficiency, and cardboard is when thin, and the riveted joint effect is undesirable, therefore should select for use thickness in monolayer at 2 millimeters and above insulating board.As splay end circle thickness is 10 millimeters, and then can select two layers of thickness is 5 millimeters insulating board; As splay end circle thickness is 11 millimeters, and then can select one deck thickness is 5 millimeters, and another layer thickness is 6 millimeters a insulating board.Can certainly select more multi-layered insulating board for use, selecting materials of the inventive method is not limited to above compound mode.
Press the blanking of each layer of splay end circle development size, it is trapezoidal that insulating board is approximately flat square shown in Figure 1 after the blanking, each layer insulating board length, and promptly trapezoidal height still calculates according to following formula:
l
n＝2π(r＋δ
1+δ
2+…+δ
n)-A
δ wherein
nBe the insulating board thickness of n layer, do not consider insulating varnish thickness.
2, an amount of water is sprayed at the insulating board two sides uniformly.The purpose of wet water is the plasticity of reinforced insulation cardboard, makes insulating board be convenient to round as a ball moulding.For guaranteeing the insulation property of splay end circle, should use pure water, as distilled water.The wet water yield should be an amount of, and is excessive as the wet water yield, then increases the dry run time in the subsequent technique, not enough as the wet water yield, because insulating board is very hard, is not easy to round as a ball moulding.
Better embodiment of the present invention adopts the film or the other materials of good sealing effect to seal a period of time up for safekeeping the insulating board behind the wet water, and the purpose of sealing up for safekeeping is to make moisture fully to be penetrated in the insulating board.With the difference of insulating board thickness, the time of sealing up for safekeeping is different in size, generally should seal up for safekeeping 12 hours or the longer time.
3, the insulating board that will wet after the water treatment carries out round as a ball.The simple hand method for rolling circle also can adopt spheronizator round as a ball as shown in Figure 2.
4, select suitable mold according to splay end circle internal diameter, the insulating paper cylinder after round as a ball is enclosed within on the mold, tighten up, send into the drying room oven dry then with belt tensioner.
5, after the oven dry, according to the splay end circle hand of spiral each layer insulating paper cylinder is nested in together, make the register of each layer insulating paper cylinder, clamp with clamping device (1), evenly punch according to certain distance along spiral end face (2) and circular end surface (3), with in insulated bolt (4) the riveting hand-hole, the part that will expose the paper web surface then cuts out, and makes it to flush with the insulating paper cylinder surfaces externally and internally then.Insulated bolt is preferably used the threaded bar of the wooden one-tenth of lamination, make to rivet more firmly between each layer, and insulation effect is good.
Splay end circle after the riveted joint can be done further finishing according to actual needs, is bridging type as splay end circle open design, then can carry out the slope with electric planer at opening part and handle, and makes overlap thickness even.The not all splay end circle of this procedure is all necessary.
Process of the present invention is compared with conventional method, can save the closely time of half; By In in the market thick insulating board from the unit thickness low price, and in this method Middle insulated paint is dispensable, so the inventive method can reduce material cost greatly. In addition, The splay end circle that the inventive method is produced can be not creepage, the shelf depreciation value reduced greatly, in avoiding The property point discharge, the quality index such as the levels of precision of its thickness, mechanical strength all improve a lot.
Claims (4)
1, a kind of method for making oblique end ring of transformer is characterized in that comprising following technical process:
1. select the insulating board number of plies and every layer thickness according to the thickness of splay end circle, and according to the blanking of each layer development size;
2. to the evenly wet water in insulating board two sides;
3. the round as a ball one-tenth insulating paper cylinder of insulating board behind the water will wet;
4. the insulating paper cylinder after round as a ball is wrapped up on mold, and tightened up, and it is dry to put into drying room with belt tensioner;
5. the hand of spiral of dried insulating paper cylinder according to the splay end circle is nested in together, use clamping device (1) to clamp, spiral end face (2) and evenly punching of circular end surface (3) along the splay end circle, in insulated bolt (4) riveting hand-hole, each layer insulating paper cylinder is riveted together, the part on finishing insulated bolt bared end circle surface makes end circle flush.
2, method for making oblique end ring of transformer as claimed in claim 1, should select thickness in monolayer when it is characterized in that selecting materials for use is 2 millimeters and above insulating board.
3, method for making oblique end ring of transformer as claimed in claim 1, it is characterized in that also comprising following technical process: the insulating board behind the water that will wet adopts the film or the other materials of good sealing effect to seal a period of time up for safekeeping, and moisture is penetrated in the insulating board more fully.
4, method for making oblique end ring of transformer as claimed in claim 1 is characterized in that insulated bolt (4) specifically is that threaded lamination wooden stick constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01145317 CN1428797A (en) | 2001-12-28 | 2001-12-28 | Method for making oblique end ring of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01145317 CN1428797A (en) | 2001-12-28 | 2001-12-28 | Method for making oblique end ring of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1428797A true CN1428797A (en) | 2003-07-09 |
Family
ID=4678126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01145317 Pending CN1428797A (en) | 2001-12-28 | 2001-12-28 | Method for making oblique end ring of transformer |
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| Country | Link |
|---|---|
| CN (1) | CN1428797A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236832B (en) * | 2007-12-05 | 2010-09-29 | 中国西电电气股份有限公司 | A making technology for end ring |
| CN101934603A (en) * | 2010-08-03 | 2011-01-05 | 湖南广信电工科技股份有限公司 | Production process of insulating paper screw |
| CN102368436A (en) * | 2011-11-10 | 2012-03-07 | 保定天威集团有限公司 | Moulding process of diagonal end ring of transformer and special mould |
| CN102682976A (en) * | 2012-06-11 | 2012-09-19 | 泰州新源电工器材有限公司 | Step dislocation laminating method for processing transformer insulation end rings |
| CN103077820A (en) * | 2012-12-31 | 2013-05-01 | 湖南广信电工科技有限公司 | Production process of coiling type pressure-regulating oblique end ring |
| CN103117159A (en) * | 2013-02-28 | 2013-05-22 | 山东达驰电气有限公司 | Large oil-immersed transformer insulated end ring and manufacturing technology thereof |
| CN103123861A (en) * | 2013-03-01 | 2013-05-29 | 山东达驰电气有限公司 | Transformer body laminated board treatment technology |
| CN103187155A (en) * | 2011-12-30 | 2013-07-03 | 洛阳恒光特种变压器有限公司 | Layered voltage regulation coil |
| CN114571799A (en) * | 2022-03-04 | 2022-06-03 | 潍坊汇胜绝缘技术有限公司 | Preparation method of high-thickness large-size coiled electrostatic ring framework |
-
2001
- 2001-12-28 CN CN 01145317 patent/CN1428797A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101236832B (en) * | 2007-12-05 | 2010-09-29 | 中国西电电气股份有限公司 | A making technology for end ring |
| CN101934603A (en) * | 2010-08-03 | 2011-01-05 | 湖南广信电工科技股份有限公司 | Production process of insulating paper screw |
| CN101934603B (en) * | 2010-08-03 | 2013-07-17 | 湖南广信电工科技股份有限公司 | Production process of insulating paper screw |
| CN102368436A (en) * | 2011-11-10 | 2012-03-07 | 保定天威集团有限公司 | Moulding process of diagonal end ring of transformer and special mould |
| CN103187155A (en) * | 2011-12-30 | 2013-07-03 | 洛阳恒光特种变压器有限公司 | Layered voltage regulation coil |
| CN102682976B (en) * | 2012-06-11 | 2015-02-18 | 泰州新源电工器材有限公司 | Step dislocation laminating method for processing transformer insulation end rings |
| CN102682976A (en) * | 2012-06-11 | 2012-09-19 | 泰州新源电工器材有限公司 | Step dislocation laminating method for processing transformer insulation end rings |
| CN103077820A (en) * | 2012-12-31 | 2013-05-01 | 湖南广信电工科技有限公司 | Production process of coiling type pressure-regulating oblique end ring |
| CN103117159A (en) * | 2013-02-28 | 2013-05-22 | 山东达驰电气有限公司 | Large oil-immersed transformer insulated end ring and manufacturing technology thereof |
| CN103117159B (en) * | 2013-02-28 | 2016-03-02 | 山东达驰电气有限公司 | Large Oil immersion insulating end ring of transformer and manufacture craft thereof |
| CN103123861A (en) * | 2013-03-01 | 2013-05-29 | 山东达驰电气有限公司 | Transformer body laminated board treatment technology |
| CN103123861B (en) * | 2013-03-01 | 2016-04-20 | 山东达驰电气有限公司 | A kind of transformer body pressing plate treatment process |
| CN114571799A (en) * | 2022-03-04 | 2022-06-03 | 潍坊汇胜绝缘技术有限公司 | Preparation method of high-thickness large-size coiled electrostatic ring framework |
| CN114571799B (en) * | 2022-03-04 | 2023-11-24 | 潍坊汇胜绝缘技术有限公司 | Preparation method of high-thickness large-size rolled electrostatic ring framework |
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| WD01 | Invention patent application deemed withdrawn after publication |