CN2594945Y

CN2594945Y - Core of dry transformer

Info

Publication number: CN2594945Y
Application number: CN 02250273
Authority: CN
Inventors: 陈浩泉
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-13
Filing date: 2002-12-13
Publication date: 2003-12-24
Anticipated expiration: 2012-12-13

Abstract

The utility model relates to an iron core of a dry transformer. The utility model is provided with the iron core (1) which is composed of laminated silicon-steel sheets, and a pulling strap (2) is wound on a core column of the iron core. The utility model is characterized in that the pulling strap is provided with a connecting port (5) for pulling apart definite spaces, the end of the pulling strap at both sides of the connecting port is respectively provided with a transverse mould core (4) of the pulling strap, and the two mould cores (4) of the pulling strap are connected into integration through screw bolts (3) which are respectively positioned at the both sides of the pulling strap. The pulling strap on the core column of the iron core of the utility model can be tensioned through the screw bolts on the both ends of the mould cores of the pulling strap, and the pulling strap can be adjusted and tensioned after baking and solidifying; therefore, the iron core is reliably fastened, and noise in the process of operation is reduced.

Description

A kind of dry-type transformer iron core

Technical field

The utility model belongs to a kind of dry-type transformer iron core.

Background technology

The be in operation noise that produces of dry-type transformer mainly is that the magnetostriction that silicon steel sheet produces during by the iron core excitation causes, the size of iron core diameter, magnetic flux density and iron core manufacturing process have a direct impact noise of transformer, wherein in manufacturing process, the fastening degree of iron core is unreliable, the noise that produces in the time of can making core vibration is propagated out by coupled object, directly causes the increasing of noise.Prior art is to the fixing method that all adopts colligation to solidify of dry-type transformer iron core, promptly use no latitude viscous glass silk ribbon take-up strap outside iron core, add again and cure, because the coefficient of thermal expansion and contraction of no latitude viscous glass silk ribbon is littler than the coefficient of thermal expansion and contraction of silicon sheet core, tend to after curing cause between silk ribbon and the iron core and produce air gap, destroy firm degree, and because the no latitude viscous glass silk ribbon after curing has been bonded on the iron core, can not be again again around, it is fastening fully to cause iron core not obtain.

Summary of the invention

The technical problems to be solved in the utility model provides the good dry-type transformer iron core of a kind of fastening degree.

The technical scheme that addresses the above problem is (referring to implementing illustration): the utility model is provided with the iron core of being made up of the lamination silicon steel sheet (1), be wound with drawstring (2) on the iron core stem stem, it is characterized in that: described drawstring is provided with the connectivity port (5) of drawing back a determining deviation, the drawstring end of both sides, connectivity port is equipped with horizontal drawstring core rod (4) respectively, and two drawstring core rods (4) are connected as a single entity by the bolt (3) that lays respectively at the drawstring both sides.

Drawstring on the utility model iron core stem stem can be strained by the bolt on its two ends drawstring core rod, and can regulate tension once again by bolt after baked and cured, makes iron core fastening reliably, reduces operating noise.

Description of drawings

Fig. 1, the utility model example structure schematic diagram

Fig. 2, drawstring shown in Figure 12 structural representations

The A of Fig. 3, Fig. 2 is to the structure for amplifying schematic diagram

Fig. 4, drawstring core rod 4 structural representations

1-iron core 2-drawstring 3-bolt 4-drawstring core rod 5-connectivity port 6-screw

Specific embodiments

The embodiment explanation

The drawstring end at these 5 places, routine drawstring connectivity port is enclosed within on the drawstring core rod 4, and drawstring core rod two ends are respectively equipped with bolt hole 6, two bolts 3 and pass the screw of two drawstring core rods, 4 corresponding end respectively, and two drawstring core rods are connected as a single entity.

This routine manufacturing process is:

1, adjusts the position of two drawstring core rods 4, and make its spacing from about less than the about 20mm of iron core stem stem section girth;

2, twining the drawstring 2 of glass fibre material between two drawstring core rods 4, is about 1.5～2mm until drawstring thickness;

3, tie up iron core 1 stem stem (because its length is less than the iron core section girth, so can produce connectivity port 5) with drawstring 2, the place passes the screw 6 of two drawstring core rod 4 corresponding end respectively with two bolts 3 in the connectivity port, and tension drawstring 2 tights a bolt;

4, iron core is put into drying oven, under the temperature of 120～150 ℃ of furnace temperature, cured 4～6 hours, drawstring is solidified;

5, fastening bolt is strained the drawstring after the curing once again.

This example is the dry-type transformer iron core of 800KVA, and its noise of national Specification must not surpass 64 decibels, and not using the utility model constructed products noise is 53 decibels, and the noise of present embodiment only is 43 decibels, far below national standard and like product.

Claims

1, a kind of dry-type transformer iron core, be provided with the iron core of forming by the lamination silicon steel sheet (1), be wound with drawstring (2) on the iron core stem stem, it is characterized in that: described drawstring is provided with the connectivity port (5) of drawing back a determining deviation, the drawstring end of both sides, connectivity port is equipped with horizontal drawstring core rod (4) respectively, and two drawstring core rods (4) are connected as a single entity by the bolt (3) that lays respectively at the drawstring both sides.

2, dry-type transformer iron core according to claim 1 is characterized in that: the drawstring end that described drawstring connectivity port (5) is located is enclosed within on the drawstring core rod (4).