CN201489975U - Dry type transformer for railway vehicle - Google Patents

Abstract

The utility model discloses a dry type transformer for a railway vehicle. The transformer comprises an iron core, a primary winding, a transformer body assembling and an outgoing line, wherein an interlayer and the end part of the winding are provided with insulation layers; the winding is wholly wrapped with a plurality of layers of insulation materials; the iron core and the winding are wholly dipped with lacquer after being assembled; the whole winding except the insulated interlayer and end part is wrapped with an insulation material; and the winding and the iron core are wholly dipped with lacquer after being assembled. The lacquer-dipped insulation material of the transformer winding and the outgoing line structure ensure waterproofness of the transformer, so that the transformer can work in damp and watery environment and can operate for a short time if completely submerged in water; and meanwhile, the transformer has good quake resistance because of the special iron core structure and the whole lacquer dipping process.

Description

Dry type transformer for railway vehicle

Technical field

The utility model relates to a kind of dry type transformer for railway vehicle.

Background technology

Existing dry type transformer for railway vehicle generally adopts the immersion-type dry-type transformer, this transformer comprises iron core, the low pressure winding, high pressure winding etc., iron core is made of stem and yoke, the low pressure winding is enclosed within on the stem unshakable in one's determination, the high pressure winding is sleeved on the low pressure winding, be provided with insulating barrier between winding layers, winding coil adopts vacuum pressure impregnation, transformer can have the ability and the resistance to elevated temperatures of bearing short circuit more by force like this, but the waterproof of this transformer and resistance to shock are relatively poor, and the rail vehicle transformer is in extreme service conditions work, in environment with water, be to save vehicle interior space, transformer even directly be suspended on the below of vehicle chassis, vibration is violent, attacked by moisture content, if when having water droplet directly to spill to splash transformer on one's body, may cause the damage of transformer, even damage other electric equipment of vehicle.

Summary of the invention

The purpose of this utility model provides a kind of good waterproof performance and the good dry type transformer for railway vehicle of shock resistance.

For achieving the above object, the technical solution adopted in the utility model is: a kind of dry type transformer for railway vehicle, this transformer comprises iron core, primary and secondary winding, the assembling of device body and lead-out wire, be connected with the transformer outgoing cable on the lead-out wire of described winding, the interlayer and the end of described winding are provided with insulating barrier, the integral body of described winding is enclosed with multi-layer insulation, and described iron core, described winding assemble the whole dipping lacquer in back.

The lead-out wire of described winding and described transformer outgoing cable connection are enclosed with watertight composition.

Because the utility model has adopted above technical scheme, its advantage is as follows: on the winding except interlayer and overhang insulation, the also wrap insulate material on the whole of winding, after winding and iron core assemble, whole dipping lacquer, the insulating material that soaked lacquer of Transformer Winding and the water resistance that the lead-out wire structure has guaranteed transformer, can be operated in the environment with water, also can move in short-term when being immersed in the water fully, simultaneously, distinctive core construction and whole paint-dipping process make the transformer anti-seismic performance also fabulous.

Description of drawings

Accompanying drawing 1 is a schematic diagram of the present utility model;

Accompanying drawing 2 is the enlarged drawing at I place in the accompanying drawing 1;

Accompanying drawing 3 is along the cutaway view of A-A direction in the accompanying drawing 1;

Accompanying drawing 4 is the utility model core construction schematic diagram.

Embodiment

Further set forth the utility model below in conjunction with accompanying drawing.

A kind of dry type transformer for railway vehicle, this transformer body comprise iron core, primary and secondary winding, the assembling of device body and lead-out wire structure.Transformer is a kind of static electric equipment, it is by the effect of electromagnetic induction, the AC energy of a kind of voltage or circuit is transformed into the identical another kind of voltage of frequency or the AC energy of circuit, transformer is realized energy between two circuit by electromagnetic induction, so it must have circuit and two essential parts of magnetic circuit.As circuit is the different and windings insulated from each other of the two or several numbers of turn, as magnetic circuit is a closed core, winding and the form that is provided with unshakable in one's determination have a variety of, iron core comprises stem and iron yoke, the unshakable in one's determination main heart type structure that adopts of general power transformer, it is with A, B, the winding of C three-phase is placed on respectively on three core limbs, three core limbs are by last, following two iron yokes couple together, constitute closed magnetic circuit, unshakable in one's determination 8 material adopts the orientation silicon steel sheet, and full bias seam is considered the safety of transportation when transformer is loaded on the vehicle and attractive in appearance, unshakable in one's determination 8 wedge angle is removed, as shown in Figure 4.Be to strengthen transformer overall mechanical strength and resistance to shock, core section adopts rectangle, the perforate of iron yoke, and with drawing screw rod to strain, whole again dipping lacquer behind the mounting coil.Winding 5 is to be formed by the insulated conductor coiling, and insulated conductor adopts NOMEX paper bag copper cash, for the ease of insulation, the low pressure winding is near core limb, and the high pressure winding is enclosed within the outside of low pressure winding, and the interlayer of winding 5 is provided with insulating barrier 7, as depicted in figs. 1 and 2, the integral body of winding 5 is enclosed with multi-layer insulation 6, and insulating material 6 has good impregnability, in Fig. 1 and 2, winding adopts layer insulation on the one hand, on the other hand, at vertical wrapped multiple insulating material 5 of winding, every layer of insulating material 5 is along the circumferential extension of winding coil, wrap the integral body of winding coil, unshakable in one's determination, winding assembles the whole dipping lacquer in back, adopts vacuum pressure impregnation, after device body drying is thorough, the device body is put into impregnating vessel, this moment, impregnating vessel did not coat with lacquer, and then impregnating vessel was vacuumized, and added lacquer again in impregnating vessel, the device body is dipping lacquer on one side, on one side impregnating vessel is vacuumized, wait lacquer not have device after one's death, stop impregnating vessel being vacuumized, add malleation, can quicken lacquer like this and enter insulation and waterproof, after the lacquer drip-dry, advance the stove-drying lacquer and get final product.Whole wrap insulate material on winding coil, after winding coil and iron core assemble, whole dipping lacquer, the insulating material that soaked lacquer of Transformer Winding has guaranteed the water resistance of Transformer Winding, it can be operated in the environment with water, also can move in short-term when being immersed in the water fully, simultaneously, distinctive core construction and whole paint-dipping process make the transformer anti-seismic performance also fabulous.

Consideration for waterproof, except wrap insulate material on coil and to the whole dipping lacquer of device body, the lead-out wire 1 and transformer outgoing cable 4 connections of winding are enclosed with watertight composition 2, the lead-out wire 1 of winding is the former line NOMEX of a coil paper bag copper cash, skin at copper cash is enclosed with insulating material and waterproof material, and then be connected by joint 3 with transformer outgoing cable 4, on joint 3, be enclosed with watertight composition 2, as shown in Figure 3, electric wire exposed when the lead-out wire 1 that can prevent winding was connected with transformer outgoing cable 4, cause that circuit damages after bumping water, watertight composition 2 encases the whole outer surface of joint 3, and extend one section along the length direction of lead-out wire 1 and outgoing cable 4, the one section lead-out wire 1 that makes watertight composition 2 cover to join with joint 3 and the outer surface of one section outgoing cable 4 have so fully guaranteed the lead-out wire 1 of winding and the waterproof safety of transformer outgoing cable 4 connections.

Claims (2)

1. dry type transformer for railway vehicle, this transformer comprises iron core, primary and secondary winding, the assembling of device body and lead-out wire, be connected with the transformer outgoing cable on the lead-out wire of described winding, the interlayer and the end of described winding are provided with insulating barrier, it is characterized in that: the integral body of described winding is enclosed with multi-layer insulation, and described iron core, described winding assemble the whole dipping lacquer in back.

2. dry type transformer for railway vehicle according to claim 1 is characterized in that: the lead-out wire of described winding and described transformer outgoing cable connection are enclosed with watertight composition.

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