Place of Origin : Jiangsu, China (Mainland)
Brand Name : WONDERY
Supply Ability : 100 Sets per Year
Packaging Details : DULY PACKED AND SUITABLE FOR SEA TRANSPORTATION
MOQ : 1 Set
Price : Negotiable
Model Number : VPI
Certification : CE
Delivery Time : 60 Days
Payment Terms : L/C, T/T
Name : Vacuum pressure impregnation equipment
Motors to be treated : HV and LV motor windings
Impregnation tank diameter : 900MM to 5000MM
Working pressure : 0.6Mpa or above
Impregnation tank material : 345R steel
Vacuum degree : -5000Pa to -100Pa
Motor Windings Varnish Vacuum Pressure Impregnation Equipment Max Dia 5000 mm
The VPI series vacuum varnish impregnation machine impregnates the workpieces in a sealed tank
under a certain pressure,which forces the impregnant to immerse more completely into the gaps of the
workpieces. The vacuum impregnation process equipment is specially used for impregnation of windings of
high voltage motors, traction motors, special motors, anti explosion pump motors, magnetic motors,
and transformers. The windings after impregnation in VPI equipment have an improved insulation performance,
a reduced surface temperature, an improved mechanical strength, a reduced fault rate, a better anti-moisture
capacity, and a long service life.
The impregnating tank cover is opened and closed with the help of a hydraulic mechanism. The signal is
feedback through non-contact proximity switch. The tank cover opening angle follows the rule that the top
point of the opened cover passes over the inner wall of the impregnating tank.
The impregnating tank is equipped with a level transmitter.
The impregnating tank is equipped with an over-pressure alarm, and a pressure safety device.
The impregnating tank is designed with one anti-explosion peephole light and one observation window.
The impregnating tank of the vacuum pressure impregnation equipment is sealed by a silicon rubber ring.
When the impregnating tank cover is opened, the tank has safety interlock mechanism.
The impregnating tank is a vertical type.
The impregnation tank is equipped with a infrared camera so as to check the working performance of the tank.
3. Process flow of vacuum pressure impregnation process:
VPI process flow: pre drying and dehumidification → entering the impregnating tank → vacuum suction →
vacuum impregnation → pressure impregnation → resin retrun → pressure relieft and resin dripping→
parts out of the vacuum impregnation tank → curing and drying
4. Technical Parameters
|Model||Diameter of Impregnation Tank||Nominal Volume of Impregnating Tank||Vacuum Degree||Working Pressure||Floor Area|
Note: PLC automatic control. The equipment is in the vertical type. Horizontal type can also be supplied
if thus requested by the customer
The company mainly supplies the following products: VPI series vacuum pressure impregnation equipment,
FGH vacuum impregnation drying machine, vacuum impregnation pressurized impregnation equipment,
water-curtain type paint spraying chamber, assembly conveyance line, energy-saving drying ovens, baking
ovens, and others.The above products are widely used for impregnation treatment of windings of motors,
electrical equipment, high voltage motors, traction motors, special motors, pump motors, magnetic motors,
and transformers. The equipment is a newly energy-saving equipment, which greatly improves product quality,
reduces production cost, and strengthens competitiveness.
5.Process application of vacuum pressure impregnation process (VPI) for motors
Comparison: obviously, VPI is far superior to other dipping and impregnating processes in terms of resin
penetration and impregnation. It is suitable for large windings, multi-layer windings and other applications with
high voltage winding requirements. In theory, the application of VPI, vacuum and pressure can be done quite
high, of course, the cost is also high. In the application experiment and practical work, it is found that the
vacuum environment can produce a large number of bubbles and a large amount of liquid mist in the impregnating
varnish when a vacuum impregnating varnish at a certain temperature condition reaches a corresponding "critical"
vacuum when the vacuum is below a certain absolute pressure value. That is, the phenomenon of "foaming" and
"atomization" occurs. "Foaming" causes a large number of holes in theresinsolution, which will hinder the infiltration.
"Atomization" causes a large amount of solvent or diluent to escape, which will affect the curing. In principle,
pressurization is to make theresinliquid easier to enter the filling gap. In fact, there is an atmospheric pressure
in theresinconveying process. If the wettability of the capillary in the insulating structure has been balanced,
increasing the pressure has no obvious effect on the filling of the whole insulating structure, unless the increased
pressure is maintained during curing. Therefore, the effective way to increase the filling is to reduce the viscosity
of the resin, reduce the gap of the insulating structure and improve the capillary effect, rather than increasing the
pressure. According to the test of "viscosity and pressure on penetration rate", the data show that when the viscosity
ofresinsolution is large, increasing the pressure has a great effect on the filling speed, and when the viscosity of resin solution
is small, the effect of increasing the pressure on the filling speed is not significant. However, the viscosity ofresinsolution
has a very significant impact on the filling speed, which is inversely proportional. It can be seen that in the application of
VPI process, it is blind and useless to emphasize and simply pursue high vacuum or high pressure. The result will affect
the impregnation efficiency and even destroy the impregnation quality.
Motor Windings Varnish Vacuum Pressure Impregnation Equipment Max Dia 5000 mm Images