Vacuum liquid pressure impregnation device and impregnation method

Abstract

The invention discloses a vacuum liquid pressure impregnation (VLPI) device and an impregnation method. The device comprises a paint storage tank, a paint soaking tank, a vacuum set, an external pressurizing assembly, an evacuating assembly, and an internal circulation assembly. The vacuum set and the evacuating assembly are both connected to the paint soaking tank. The paint storage tank is connected to the paint soaking tank through the external pressurizing assembly. One end of the internal circulation assembly is connected to the paint storage tank, and the other end is connected to the external pressurizing assembly. The method comprises the following steps: step one, carrying out vacuum dehumidifying; step two, performing vacuum paint soaking; step three, carrying out liquid pressure impregnation; step four, dripping paint; and step five, taking out workpiece. The provided device and method have the advantages that the pressure increasing is rapid and stable, the impregnation effect and product quality are high, and the paint filtering frequency is reduced.

Description

technical field [0001] The present invention mainly relates to dipping treatment technology, in particular to a vacuum hydraulic dipping device and dipping method (VLPI). Background technique [0002] Vacuum impregnation equipment can be used for insulation impregnation treatment of electrical coils such as various types of motors, transformers, power transformers, etc. It can improve the penetration ability of insulating varnish and increase the filling rate, thereby improving the overall mechanical strength, insulation strength and moisture-proof of electrical coils. Mildew and other properties. The principle is to place the workpiece to be processed in a vacuum container, remove moisture, air and other volatile substances in the workpiece by vacuuming, and then fill the gap with insulating materials. [0003] Most of the existing vacuum hydraulic impregnation equipment uses compressed air to pressurize the impregnation tank, and the maximum pressure applied in the impreg...

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Problems solved by technology

[0003] Most of the existing vacuum hydraulic impregnation equipment uses compressed air to pressurize the impregnation tank, and the maximum pressure in the impregnation tank is 0.7Mpa. The production of high-voltage motors under this pressure takes a long time to pressurize, and the moisture and impurities in the compressed air The existence and changes of the insulating varnish in the system are likely to be polluted for a long time, which affects the impregnation effect and the stability of the overall insulation performance

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