Vacuum Pressure Impregnation Machine (VPI)
Extend the life and operation of your motor -- Choose a motor that utilizes vacuum pressure impregnation to protect and maintain void-free electrical windings.
1. What is VPI (Vacuum Pressure Impregnation)?
Vacuum Pressure Impregnation (VPI) is a process that uses vacuum and pressure to seal porous materials with varnish or resin. The process is used primarily for high-voltage motors and generators to fill gaps in materials to create a void free insulation in various devices.
Industrial electromechanical equipment is designed for durability to provide reliable function and increased longevity, but age, temperature, and environmental factors can degrade porous metals over time. The process of impregnation seals porous materials with varnish or resin, improving the function and longevity of equipment.
2. The Benefits of VPI
· Modifications or custom-assembly to meet specific need
· Properly sized Impregnator and Storage Tank lowers operating costs by reducing costly resin inventories, Chiller load requirements, Inert gas consumption, and improving cycle times
· Quality and cost control over manufacturing and assembly
· Eliminates delays, re-work, costly mistakes arising from the use of several subcontractors
· Deeper resin penetration
· Void-free insulation that minimizes corona, improves heat transfer and provides greater bond strength
· Protects against moisture, dirt and corrosive chemicals
· Results in longer life for the motor rewinds, boosting the shop's reputation for quality work
3. Technical parameters of vacuum impregnation machine
|
Model |
YC-VPI-900 |
YC-VPI-1000 |
YC-VPI-1200 |
YC-VPI-1400 |
YC-VPI-1600 |
YC-VPI-1800 |
|
VPI Tank size(mm) (diameter * height) |
Φ900*900 |
Φ1000*1000 |
Φ1200*1200 |
Φ1400*1400 |
Φ1600*1600 |
Φ1800*1800 |
|
Heating Power (Kw) |
12 |
15 |
21 |
27 |
33 |
40.5 |
|
Vacuum Degree (Mpa) |
-0.098 |
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|
Pressure (Mpa) |
Custom design |
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|
Fan Power(Kw) |
0.75 |
1.5 |
3 |
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|
Vacuum pump power (Kw) |
1.5 |
3 |
5.5 |
7.5 |
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|
Dimensions(L*W) mm |
3600*1800 |
3700*1800 |
4200*2200 |
4500*2200 |
In bulk 16m² |
In bulk 18m² |
|
Weight (T) |
2 |
2.5 |
2.8 |
3.2 |
4.5 |
6 |
Note: above is the standard type of our VPI equipment. We can custom design to customers’ requirements.
4. General process of VPI
YICHENG specializes in vacuum pressure impregnation equipment manufacturing, which is more effective than traditional dip-and-bake methods and is better suited to high voltage motors and generators. Our basic vacuum pressure impregnation motor repair process comprises several steps.
· Pre-heating
Workpieces are placed in an oven and get heating up to allow moisture to evaporate. This helps the resin better penetrate the material.
· Dry Vacuuming
Workpieces are removed from the oven and place it into a vacuum chamber, which removes air and any remaining moisture.
· Filling
The impregnation chamber is filled with resin, coating the part and filling in all the gaps and pores in workpiece.
· Wet Vacuuming
Vacuum levels are reduced and hold it for a set period of time.
