Vacuum Impregnation of Motor , Vacuum Impregnation Process for
Transformers
1. What is vacuum impregnation process?
The vacuum impregnation process can be used for insulation
impregnation treatment of electrical coils such
as micro motors, transformers, power transformers, etc. It can
improve the permeability of insulation paint,
increase filling rate, and thus improve the overall mechanical
strength, insulation strength, moisture and
mold resistance of electrical coils.
Vacuum impregnation equipment, also known as varnish vacuum
impregnation machine or vacuum pressure
impregnation machine (VPI). The principle is to place the workpiece
to be processed in a vacuum container,
and by vacuuming, remove moisture, air, and other volatile
substances from the workpiece, and then fill the
gaps with insulating materials.
2. Varnish Vacuum Impregnation Equipment Technical Parameters
Vacuum Impregnation Tank: Tank size: Φ500-5000mm (customized) Materials used: (according to pressure vessel standards). Head: 16MnR. Barrel: 16MnR. Flange: Q235-B forging. Working pressure: 0.6MPa (controllable and adjustable). Working vacuum:100Pa (adjustable) Hydraulic tank lid opening and closing mechanism with safety
interlink; Resin return method: bottom resin return. Pressurizing medium: could be nitrogen or compressed air; Installation form: vertical. |
Resin Storage System for VPI system: Size: dia500-5000mm (customized) Materials used: Head: Q235-B; Cylinder: Q235-B; flange: Q235-B; Working vacuum: - 0.095 Mpa, installation form: vertical; Stirrer: 25-36rpm; Heating and cooling function (via thermal oil) |
| Vacuum system, 1 set |
| Vacuum buffer system, 1 set |
| Resin filtration system, 1 set |
| Return resin system, 1 set |
Hydraulic system Design pressure 16MPa, working pressure ≤12MPa. |
| Thermal oil heating system, 1 set |
| Control system, 1 set |
3. Commissioning
The motor coil vacuum impregnation machine is ready tested before
delivery, and all units of the equipment is already
installed on an overall base plate for vacuum impregnation
equipment with diameter less than 1000mm. After receipt of
the machine, the machine is ready to use when power is connected.
For varnish vacuum impregnation system with diameter bigger than
1000mm, we would send our engineers to the customer’s
site for installation and commissioning.
