High-humidity-resistant insulating sheath material for transformer and preparation method thereof

Abstract

The invention discloses a high-humidity-resistant insulating sheath material for a transformer and a preparation method thereof. The sheath material is prepared from the following raw materials in parts by weight: 80-100 parts of tetrafluoroethylene-propylene rubber, 25-35 parts of ethylene-propylene-diene monomer, 10-15 parts of nitrile rubber, 3-6 parts of zinc oxide, 2-4 parts of magnesium oxide, 1-2 parts of stearic acid, 1.5-2.5 parts of dibutyltin dilaurate, 2-4 parts of palm wax, 20-30 parts of carbon black N990, 10-15 parts of dibutyl phthalate, 5-10 parts of paraffin oil, 15-25 parts of alumina silicate, 10-15 parts of nanometer diatomite, 4-8 parts of a composite filling material, 2-3 parts of bismaleimide, 3-5 parts of insoluble sulphur, 1-1.5 parts of promoter TETD, 1-2 parts of antiager 4010 and 1-2 parts of an antioxidant. The sheath material of the invention employs the rubber main material with relatively good ozone resistance, and also employs the antioxidant, the composite filling material and the like with good ozone resistance in the formula, so that the sheath material is improved in high humidity resistance and ozone resistance while the good insulating performance and the physical mechanical properties of the sheath material are guaranteed.

Description

technical field [0001] The invention relates to a high-humidity resistant insulating sheath material for a transformer and a preparation method thereof, belonging to the technical field of sealing materials. Background technique [0002] The transformer insulating sheath is used for the shielding insulation protection of the surface of the transformer bus bridge tube parent, which can effectively prevent the exposed transformer bus bridge from being accidentally touched by humans, small animals such as birds and animals or foreign objects. Electrical accidents caused by condensation flashover, pollution flashover, and icicle sticky snow, and prevent power outage accidents caused by salt spray, acid rain, and chemical gas corrosion that damage the inlet and outlet lines of transformers. Various equipment of the transformer will produce different degrees of discharge phenomenon when it is running in humid air, and ozone will be generated along with the discharge phenomenon. Th...

AI Technical Summary

Problems solved by technology

Various equipment of the transformer will produce different degrees of discharge phenomenon when it is running in humid air, and ozone will be generated along with the discharge phenomenon. The transformer insulation sheath will be prone to aging and cracking due to long-term ozone pollution, resulting in short circuit, Leakage, power failure and other accidents, resulting in huge economic losses

Images