CN101819859A

CN101819859A - Iron winding core for shell transformer and method

Info

Publication number: CN101819859A
Application number: CN201010181848A
Authority: CN
Inventors: 李支柱; 王�锋; 吴正文
Original assignee: WEIHAI KDPOWER SWITCH CO Ltd
Current assignee: Weihai Huatong Switching Equipment Co., Ltd.
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2010-09-01

Abstract

The invention discloses an iron winding core for a shell transformer and a manufacturing method. The iron core has rectangular iron winding cores, and the number of the iron winding cores is two; the two iron winding cores are bond together by using a binding belt and cured by using epoxy resin, and staggered windings are sleeved on the periphery of the binding belt; and a notch is formed above the binding belt on the two rectangular iron winding cores respectively, and the two notches are distributed symmetrically. The iron winding core for the shell transformer has the advantages of good maintainability, low reluctance, great reduction of no-load loss and extremely low noise; the iron winding core is mechanically wound so as to save the labor force and improve the production efficiency; the iron winding core is integral, so the iron winding core is easy to fix and wedge; and the iron winding core has high space factor and saves materials.

Description

Iron winding core for shell transformer and method

Technical field

The present invention relates to a kind of transformer with the volume iron core, relate in particular to a kind of iron winding core for shell transformer and manufacture method that is used on the electric furnace, belong to electrical equipment technical field.

Background technology

At present, the furnace transformer on the market adopts folded core structure, and in use there is following defective in this kind structure:

1, it is poor to keep in repair row, during use, will keep in repair this coil in case the coil of a certain phase goes wrong, and whole transformer all gets stripping and re-assembly, is equivalent to restart to adorn a transformer, break and the workload of resetting very big.

2, because adopt folded core structure, every layer has 12 seams, there are several seams in whole iron core, the magnetic resistance of magnetic circuit has been strengthened in this space, the high magnetic conduction direction that adds the direction of local area magnetic circuit and silicon strip is inconsistent, thereby cause the no-load transformer electric current big, no-load loss is big, and the iron core noise is big.

Need personnel numerous when 3, lamination is made, workload is big, and production efficiency is low.

4, the wedging complex process between wedging between iron core and the mailbox and iron core and the coil.

Summary of the invention

In order to solve the problem that the folded existing maintenanceability of core type transformer is poor, the iron core noise big, lamination productivity ratio lowly reaches the wedging complex process, the invention provides a kind of iron winding core for shell transformer and manufacture method.

The technical solution adopted in the present invention is: a kind of iron winding core for shell transformer, and iron core becomes rectangle for the volume iron core, and the number of volume iron core is two; Two volume binding straps with special use unshakable in one's determination bundle and are cured with epoxy resin, are with the alternating expression winding in the periphery of binding strap; Be equipped with an otch respectively above binding strap on two rectangle volume iron cores, two otch become symmetry to distribute.

Make the method for iron winding core for shell transformer, its making step is:

1, utilizes specific plant equipment that silicon strip is rolled into rectangle volume iron core, and carry out annealing in process;

2, utilize two rectangle volume iron cores spooling binding strap to bundle, and the binding part is cured (other parts are not solidified);

3, utilize the volume iron core that is cured hoisting equipment to be put on the special customized frock; Utilize laser knife to do two otch in certain location;

4, utilize frock that two volume iron cores are separated from incision, be inserted in the alternating expression winding from open incision then;

5, utilize frock the otch back firm welding that resets, and volume iron core uncured other parts all are cured.

Shell type transformer has many advantages, and such as having the performance that good tolerance overvoltage is impacted, anti-short circuit capability is strong; The coil good cooling results, overload capacity is strong; Impedance is low; Lead-in wire is short and be easy to impedance balance; Leakage field is connected with the closed-loop path, and supplementary load loss are little etc.The present invention has also overcome the shortcoming that folded iron core mechanism causes except that the advantage that keeps shell type transformer:

1, maintenanceability is good, and which damages just keep in repair which phase mutually, need not remove entirely, and just with maintenance, workload is few.

2, coiled core significantly reduces the air-gap in the magnetic circuit, and magnetic resistance is very low, and the direction of magnetic circuit is consistent with the high magnetic conduction direction of silicon strip, and the no-load current of transformer is significantly reduced, and no-load loss reduces greatly.Because coiled core becomes the nature tightening state, twine closely in addition and be cured, thereby noise is extremely low again.

3, the volume iron core has been saved the labour by mechanical coiling, has improved production efficiency.

4, the volume iron core is an integral body, and fixedly wedging is easy.

5, volume iron core occupation efficiency height is saved material.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

Fig. 1 is a rectangular coiled core schematic diagram of the present invention.

Structural representation when Fig. 2 is solidified togather for two rectangles volume iron core of the present invention.

Fig. 3 is for being put in the volume iron core that is cured on the special tooling and the view after assigned address cuts out otch with laser knife.

Fig. 4 is inserted in the configuration state schematic diagram of alternating expression winding for the volume iron core that is cured is opened from otch from open otch.

Fig. 5 is the combining structure schematic diagram of volume iron core and winding.

Fig. 6 puts into the schematic diagram that a fuel tank becomes a single-phase transformer for the volume iron core after making up with winding.

Fig. 7 is for putting into the structural representation that a fuel tank becomes a three-phase transformer to three volume iron cores.

Embodiment

As Fig. 3, Fig. 4, shown in Figure 5, the present invention is made up of two rectangle volume iron cores 1, binding strap 2 and alternating expression windings 5.Being equipped with 3, two otch of an otch respectively above binding strap 2 on two rectangle volume iron cores 1 becomes symmetry to distribute.

Concrete manufacture method of the present invention, its step is as follows:

1, utilizes specific plant equipment that the rectangle that silicon strip is rolled into is as shown in Figure 1 rolled up iron core 1, and carry out annealing in process;

2, as shown in Figure 2, utilize two rectangle volume iron cores 1 spooling special-purpose binding strap 2 to bundle, and the binding part is cured (other parts are not solidified) with epoxy resin;

3, as shown in Figure 3, utilize the volume iron core 1 that is cured hoisting equipment to be put on the special customized frock 4; Utilize laser knife to do two otch 3 respectively in certain location;

4, as shown in Figure 4, utilize frock 4 that two volume iron cores 1 are separated from incision, be inserted in alternating expression winding 5 from open incision then;

5, as shown in Figure 5, the otch 3 back firm welding that resets, and volume iron core 1 uncured other parts all being cured with epoxy resin, is the present invention with regard to having obtained a combination of rolling up iron core and winding like this.

As shown in Figure 6, the volume iron core of making is put in the fuel tank 6, has just constituted a single-phase transformer, be applicable to the large capacity electric stove transformer.As shown in Figure 7, the furnace transformer of centering low capacity can be put in 3 volume iron cores and can form a three-phase shell-type volume iron core furnace transformer in the large tank.

Claims

1. an iron winding core for shell transformer comprises iron core, it is characterized in that: described iron core becomes rectangle for the volume iron core, and the number of volume iron core is two; Two volume iron cores bundle and are cured with epoxy resin with binding strap, are with the alternating expression winding in the periphery of binding strap; Be equipped with an otch respectively above binding strap on two rectangle volume iron cores, two otch become symmetry to distribute.

2. method of making iron winding core for shell transformer, its making step is:

1), utilize specific plant equipment that silicon strip is rolled into rectangle volume iron core, and carry out annealing in process;

2), utilize two rectangles volume iron cores of spooling binding strap to bundle, and the binding part is cured (other parts are not solidified);

3), utilize the volume iron core that is cured hoisting equipment to be put on the special customized frock; Utilize laser knife to do two otch in certain location;

4), utilizing frock to roll up iron cores to two separates from incision, is inserted in the alternating expression winding from open incision then;

5), utilize frock the otch back firm welding that resets, and volume iron core uncured other parts all are cured.