WIND-ZCJ Trickle Impregnation Machine Vacuum Pressure Impregnation

Small Frame Stator Varnish Impregnation Machine Dipping Depth Below 300mm WIND-ZCJ

Application:

This series of equipment is a vacuum impregnation process after injecting the impregnating liquid, and

then applying a certain pressure on the container. It is mainly used for the insulation treatment of coil

windings of transformers, high voltage motors, etc. The impregnation cylinder belongs to the 'pressure

vessel'.

VPI is the abbreviation of Vacuum Pressure Impregnation process. It is to pre-bake the workpiece after

cooling, placed in a vacuum environment, remove the air and volatiles inside the coil of the workpiece,

rely on the vacuum in the paint liquid gravity and coil capillary action, and the use of dry compressed air

or inert gas, to lift The impregnated varnish after the vacuum exerts a certain pressure, so that the

varnish penetrates quickly and fills the inner layer of the insulating structure. The dripping process of the

workpiece is carried out in the impregnating can, using the "hot air flow - vacuum - hot air flow" drying

process, so that the workpieces are continuously completed in the same dipping lacquer cylinder, the

workpiece pre-bake - vacuum low temperature dehumidification - vacuum ( Pressure) impregnation - paint

dripping - bottom cleaning - low temperature drying - vacuum assisted solvent recovery - high

temperature curing process. The entire processing cycle saves time and effort, greatly reduces the labor

intensity of workers, improves the labor environment, and saves a large amount of insulating paint and

power resources.

VPI's process is generally: pre-bake dehumidification → into the tank → vacuum exhaust → vacuum

impregnation → pressure impregnation → pressure lacquer → pressure relief lacquer → back lacquer

→ curing dry.

Due to the simple structure of the dipping and baking paint cylinder, the VPI is more suitable for the

insulation treatment of various large-scale high-voltage coils, multi-layer homogenous yoke coils, and

high-demanding large-scale windings and other high-voltage coils with complicated structures. After being

processed by the VPI process, the insulation performance is good, the temperature rise is reduced, the

efficiency is increased, the mechanical strength is increased, loosening of the operation process is

solved, short circuit and other insulation failures are prevented, the moisture resistance is improved, and

the service life is prolonged. However, VPI is still an insulation treatment process for gaps.