Vacuum encapsulation technology for transformer

Abstract

The invention relates to a vacuum encapsulation technology for a transformer, which comprises the following steps: 1. an epoxy adhesive of A component and a device to be encapsulated are preheated in an oven for 2h to 4h, with the temperature of the oven set as 80 DEG C to 100 DEG C; 2. the epoxy adhesive of A component, which can be stirred after being preheated, is stirred; 3. after being stirred, the epoxy adhesive of A component is matched with an epoxy adhesive of B component according to a certain proportion, then mixed together and stirred fully; 4. the preheated device is taken out and the matched epoxy adhesives are poured into the shell of the device so as to lead the surface of the adhesives to reach the height of a wire wrap; 5. the device is put into a vacuum pump and vacuumized for 10 minutes; 6. the device is taken out and dried in the oven; 7. 2 hours later, the oven is opened to check whether the elasticity of the adhesive surface of the device is in a wiredrawing state; if so, a secondary encapsulation is conducted so as to cause the height of the adhesive surface of the device to meet the final requirements of drawings; and 8. after the secondary encapsulation, the device is sent into the oven again and dried. With the method of two times of encapsulations manually, the transformer after being encapsulated has no blister internally and is good in appearance, with electrical property up to the same level of the vacuum encapsulating machine.

Description

technical field [0001] The invention relates to a transformer production process, in particular to a transformer vacuum potting process. Background technique [0002] Traditional transformers mostly adopt the method of vacuum impregnation for moisture-proof and anti-corrosion treatment of transformers. With the wide application of transformers, in order to meet the harsher environmental requirements, a kind of potting transformer is branched out. When potting this kind of transformer, special vacuum potting equipment is generally used. When using a vacuum potting machine for potting, the A and B component epoxy adhesives are placed in vacuum tanks respectively, and the proportioning is mixed in a vacuum state. After the transformer is filled with glue in a vacuum state, it is dried and formed under normal atmospheric pressure. Since the whole process of infusion is carried out in a vacuum state, when the product is finished, the surface of the device is bright and almost n...

AI Technical Summary

Problems solved by technology

However, the one-time investment of this equipment needs about 2 million yuan, and it needs a variety of special supporting accessories. If the product is in the early stage of development or the company has insufficient funds, it will not be possible to realize the production of potting transformers as soon as possible.