RU33256U1 - Heat-resistant winding wire - Google Patents

Description

The utility model relates to cable technology, namely, heat-resistant winding wire structures intended for use as part of impregnated or compounded windings of electric motors, NPP etching equipment and other electrical products.

Known heat-resistant winding wire of the POZH-700 grade, containing a conductive core made of a brkhnb 0.4-0.25 or brkhnb 0.2-0.1 alloy, galvanically coated with an iron-nickel layer, and insulated with two layers of winding high-strength glass fibers, layer and surface impregnated with an organosilicate composition, varnished

organosilicon varnish (Heat-resistant winding wires. TU 16-505.395-72).

The specified technical solution is the closest to the proposed technical essence.

Its disadvantages include the shortage of alloys used for the manufacture of conductive wires, and their high cost, as well as the lack of service life at temperatures of 200-300 ° C.

The task was to develop the design of the winding wire with affordable and less expensive materials for the conductive conductors of the core, providing a service life at 200-300 ° C for 20-30 years.

The technical result is achieved by the fact that in a heat-resistant wire containing a conductive core, isolated by layers of a winding, surface and layer-by-layer isolated by an organosilicate composition or varnished

organosilicon varnish, the conductive core is made of copper wire with a galvanic coating of iron and nickel, applied in layers.

A utility model is shown in the drawing in the drawing, which shows the proposed wire in section.

The heat-resistant winding wire contains a conductive core 1 made of copper wire with galvanic coating, nickel-iron and a winding 2, laid in two layers, impregnated with an organosilicate composition and varnished

organosilicon varnish.

The following is evidence of the industrial applicability of the utility model.

For the manufacture of wire using materials that meet the technical specifications and standards:

glass thread - TU 6-48-05786904-119-92 or

organosilicate

composition - TU 84-725-78;

organosilicon

electrical insulating

varnish - GOST 16508-70 or

Electroplated coating on a copper wire is applied in accordance with the documentation approved in the established manner.

The wire is made by traditional technology, used in the manufacture of winding wires.

The application of winding 2 to the conductive core 1 is carried out on a horizontal glass winding machine according to the following process chain.

From the delivery drum, the bare wire (conductive core 1) enters the first bath with an organosilicate composition in which an adhesive layer of the composition is applied to the wire.

TU 6-48-117-94;

TU 6-02-1-012-89.

Then, in the first wrapper, the wire is wrapped in a first layer of glass fibers, which is impregnated in a second bath with an organosilicate composition and wrapped in a second wrapper with a second layer of glass fibers in the reverse direction of the winding. Next, the wire enters the traction device, and from it into the third bath with the organosilicate composition, where the second layer of glass fibers is impregnated. After that, the wire passes through the drying oven and is completely dried, and enters the receiving drum.

Coating of winding 2 is also carried out on a horizontal glass winding machine. The wire from the transferring device enters the traction devices Oi and from it into the bathtub with silicone varnish, where the winding is varnished. Then the wire passes through the furnace and enters the receiving drum.

The claimed heat-resistant winding wire has passed the tests for resistance to special factors (radiation resistance) established by GOST B 20.39.404-81. In the technical conditions for the wire of the brand POZH-700, the above tests are not provided.

The cost of the proposed wire is 50-60% lower than the cost of the wire of the brand POZH-700, and the service life of the wire at temperatures of 200-300 ° C is 20-30 years.

Claims (1)

Heat-resistant winding wire, containing a conductive core, insulated with two layers of winding from high-strength glass fibers, layerwise and surface impregnated with an organosilicate composition and varnished with organosilicon varnish, characterized in that the conductive core is made of a copper wire with a galvanic coating of iron and nickel deposited in layers.