CN2085554U

CN2085554U - Energy-saving drying type transformer and reactance

Info

Publication number: CN2085554U
Application number: CN 91206470
Authority: CN
Inventors: 广治平
Original assignee: Beijing Scientific And Technical Development & Exchanging Centre
Current assignee: Beijing Scientific And Technical Development & Exchanging Centre
Priority date: 1991-04-24
Filing date: 1991-04-24
Publication date: 1991-09-25

Abstract

The utility model relates to a transformer and a reactor in novel structure, wherein, iron cores of the transformer and the reactor are in the structure of the shape like the Chinese character ' pin '; a cutting sleeve is arranged between a high voltage coil winding and a yoke. Therefore, compared with traditional and planar core construction, the yoke can be saved by 43.3%; the electromagnetic property is good. Due to that the cutting sleeve is used to fix a high-voltage coil, the structure between a high-voltage coil and a low-voltage is an air passage without supporting strips; creepage bridges between high and low main insulation is prevented; a path for heat dissipation is enlarged. The utility model has the advantages of low noise, high safety, high adaptability, good electricity saving effect, etc. and is suitable for the power supply networks in agriculture and industries and of cities.

Description

Energy-saving drying type transformer and reactance

The utility model relates to power system device, belongs to improved dry-type transformer and reactor.

Present existing dry reactor mostly is to belong to the plane core structure, and the transformer of this structure exists core volume big, the problem that energy consumption is high; Simultaneously because mostly coil windings is to adopt " going back the oxygen casting type " technology, form the epoxide resin insulating barrier, aging and when it because winding conductor is in operation when expanding with heat and contract with cold mechanism, and crack, destroy main insulation and cause the explosion accident of high pressure winding to take place.Traditional transformer is except that having above-mentioned shortcoming, and it is poor also to have a heat dispersion, weakness such as main insulation difference between high-voltage coil and low-voltage coil.

The purpose of this utility model provides a kind of rational in infrastructure, and energy consumption is low, safe and reliable high-performance dry-type transformer and reactor.

The utility model core structure characteristics are: the iron core general structure is " product " font, the iron core silicon steel structure adopts 45 ° of full bias seams in core portion, not punching of silicon steel sheet, guarantee lower no-load loss, iron core is not have the colligation of the glass fiber impregnated insulation resin glue of latitude with KH-550 to reinforce, assurance structural strength height can reduce noise again.

The utility model winding construction characteristics: the winding general structure is " product " font, the winding conducting wire skin has the glass layer of high insulation resistance synthetic resin gum dipping, winding also scribbles the special insulation stop-off lacquer outward and closes processing layer, is used for uvioresistant, anti-aging, protection against the tide etc.Not only designed necessary main insulating structure between high pressure winding and the iron yoke, and the cutting ferrule that adopts the high insulation resistance material to make isolates, the isolated high-voltage winding is to the main insulation of iron yoke on the one hand, on the other hand the fixing locus of high pressure winding.

The utility model can be saved yoke 43.3% than the plane iron core, and and S ₇The type oil-immersed type transformer is compared, simple electric energy expense of saving, it in 10 years the full payment of recoverable the utility model transformer investment, because cutting ferrule is arranged between high pressure winding and the iron yoke, so exempted traditional stay structure, avoid the creepage bridge of main insulation between high-low pressure, this no stay air passage structure has also enlarged heat dissipation channel.Noise is low during the work of this device, be generally less than 50 decibels, and can explosive combustion, because winding is to adopt copper electromagnetic wire, and the impregnated glass fiber enhancement layer is arranged, can bear very high overload capacity, the mechanical strength height, be adapted to high temperature, wet environment, range of capacity exists: the 10KV grade is 30～5000KVA; The 35KV grade is 50～10000KVA.

The drawing explanation:

Fig. 1. the cutaway view of iron core and winding

1. 3.45 ° of full bias seams of post iron part 2. yoke parts

Fig. 2. the cutaway view of winding

1. go up cutting ferrule 2. high pressure windings 3. low pressure windings

4. there are not 5. times cutting ferrules of stay air flue, 6. iron yokes

Fig. 3. the utility model structural representation

High-low pressure winding of the present utility model all adopts " immersion-type " advanced technologies, the high insulation resistance synthetic resin gum electrical strength of dipping usefulness was soaked back 24 hours, more than every millimeter industrial frequency withstand voltage 40KV, its dielectric constant is 10 times of air, more than 2 times of transformer oil, and the high pressure winding adopts copper electromagnetic wire, structure can adopt cartridge type in parallel or two kinds of forms of segmentation coiling, the former does not have potential difference by interlayer, and latter's interlayer potential difference is very low, and winding is safe and reliable on internal structure.The main insulation of winding adopts glass fabric and the high strength glass fiber dipping high-performance rubber polymer of handling through KH-550, and the sealing first time is carried out in the coiling while flooding.On this basis, carry out V.P.I again and handle, be i.e. the vacuum pressed insulation processing.Its dielectric voltage withstand grade can reach identical electric pressure oil-immersed type transformer level fully, and the winding mechanical strength is higher than more than the twice of oil-immersed type transformer winding.The high-low pressure winding carries out uvioresistant, anti-aging, insulating varnish sealing processing again on the basis of above-mentioned processing.

The utility model iron core material is selected the DQ147-35 cold-reduced silicon sheet for use.

The utility model environment for use: temperature-25～+ 45 ℃, height above sea level is below 1000 meters, and relative humidity is any.

Claims

A kind of transformer and reactor of being made up of iron core and coil is characterized in that:

(1) the iron core general structure is " product " font, and the iron core silicon steel sheet adopts 45 ° of full bias seam structures in core portion, and silicon steel sheet does not have punching, and the iron core skin is the back-up coat that KH-550 does not have latitude glass fiber tape impregnating resin insulating cement;

(2) the winding general structure is " product " font, and winding can adopt two kinds of versions of cartridge type in parallel or segmentation coiling, and the winding conducting wire skin is the fiberglass insulation that is impregnated with the high insulation resistance synthetic resin gum; Between high pressure winding and iron yoke, be provided with the cutting ferrule made from high voltage insulating materials up and down, be used for isolated high-voltage winding and iron yoke, guarantee main insulating structure, make simultaneously and form no stay structure between the high-low pressure winding.