Preparation method of oil-resistant and high-temperature-resistant transformer sealing element

Abstract

The invention mainly relates to the technical field of transformer part processing, and discloses a preparation method of an oil-resistant and high-temperature-resistant transformer sealing element. The preparation method comprises the following steps: (1) adding hydrogenated butadiene-acrylonitrile rubber, polytetrafluoroethylene and polyether-ether-ketone into a reaction kettle to obtain a mixture A; (2) adding an accelerant and a cross-linking agent into the mixture A to obtain a mixture B; (3) adding graphene and an anti-aging agent into the mixture B, carrying out vacuum stirring, then adding modified nano titanium dioxide and high silica glass fibers, and continuously stirring the mixture to obtain a mixture C; (4) carrying out extrusion molding on the mixture C, and carrying out high-temperature vulcanization to obtain a vulcanized sealing element; and (5) cutting and trimming the vulcanized sealing element to obtain the transformer sealing element. According to the preparationmethod, the obtained transformer sealing element is high in strength, oil resistance and high temperature resistance, the sealing element can rapidly dissipate high temperature generated by the transformer, the fault frequency of the transformer is reduced, and the service life of the transformer and the sealing element is prolonged.

Description

technical field [0001] The invention mainly relates to the technical field of transformer parts processing, in particular to a method for preparing a seal for an oil-resistant and high-temperature-resistant transformer. Background technique [0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core); the main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic Saturated transformer), etc.; can be divided into: power transformers and special transformers (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, mine transformer, audio transformer, intermediate frequency transformer, high frequency transformer, impact transformer, instrument Transformers, electronic transformers, reactors, transformers, etc.); Tra...

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Problems solved by technology

[0002] The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core); the main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic Saturated transformer), etc.; can be divided into: power transformers and special transformers (electric furnace transformer, rectifier transformer, power frequency test transformer, voltage regulator, mine transformer, audio transformer, intermediate frequency transformer, high frequency transformer, impact transformer, instrument Transformers, electronic transformers, reactors, transformers, etc.); Transformers are devices that transform AC voltage, alternating current, and impedance. When an AC current passes through the primary coil, an AC magnetic field is generated in the iron core (or magnetic core). Through, the voltage (or current) is induced in the secondary coil; the transformer is composed of an iron core (or magnetic core) and a coil, and the coil has two or more windings, of which the winding connected to the power supply is called the primary coil, and the rest The winding is called the secondary coil; the transformer often fails during use, such as abnormal noise or leakage, but 95% of the leakage faults are caused by the aging of the seals, because the oil resistance of the current transformer seals In addition, high temperature will occur during the use of the transformer, which will accelerate the aging of the seal, causing the seal to harden, deform, crack and other aging phenomena, which will lead to leakage failure of the transformer, and the transformer is often exposed to higher voltage , the maintenance of the transformer has a high risk, and once the transformer fails, it will cause a large number of lines to fail to supply power, which will cause great inconvenience and loss to production or life, especially in the production process. Once the transformer fails, it will cause all If the machine stops, it will cause great economic losses. Therefore, improving the oil resistance and high temperature resistance of the seals can significantly reduce the number of transformer failures, which greatly facilitates production and life.

[0003] The existing patent document CN106883473A discloses a transformer rubber gasket and its preparation method, specifically disclosing that the preparation raw materials are nitrile rubber, chlorinated polyethylene, wood fiber, nano-titanium dioxide, reinforcing agent, anti-aging agent, accelerator, sulfur , zinc oxide, stearic acid, plasticizer and crosslinking agent, although the prepared rubber gasket has certain oil resistance and high temperature resistance, the performance is not very ideal, and it is only for heat insulation after exposure to high temperature. It cannot play a role in heat dissipation. The transformer will have a high temperature during operation. The accumulation of high temperature is difficult to dissipate. It will inevitably cause great damage to the transformer and its working components, resulting in shortened service life of the transformer. Therefore, not only To improve the oil resistance and high temperature resistance of the seal, it is also necessary to provide the heat dissipation function of the seal

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