Processing method for vacuum drying impregnation of capacitor

Abstract

The invention discloses a processing method for vacuum drying impregnation of a capacitor. The method comprises the following steps of heating a power capacitor to 80-90 DEG C; cooling the internal temperature of the power capacitor to 70-80 DEG C, and improving the vacuum degree of the gas partial pressure in a vacuum tank to 0.5-1 Pa step by step; opening an ultrasonic generating component which is arranged on the external wall of the power capacitor, and cooling the internal temperature of the power capacitor to 40-60 DEG C, and reducing the gas partial pressure of the vacuum tank at 0.2-0.5 Pa, and meanwhile slowly pouring insulating medium oil in the power capacitor shell for 8-22 h; after the internal part of the power capacitor is filled with the insulating medium oil, maintaining the opening state of the ultrasonic, reducing the internal temperature of the power capacitor, maintaining the internal temperature at 30-40 DEG C, and controlling the vacuum degree of the gas partial pressure in the vacuum tank about 0.2-0.5 Pa. According to the processing method provided by the invention, the gas integrated into the insulation medium oil and the local few low vacuum gas which is sealed between solid medium layers and between medium and aluminum foil layers by the insulation medium oil can be exhausted more easily.

Description

technical field

[0001] The invention relates to a treatment method for vacuum drying and impregnation of capacitors, belonging to the technical field of power capacitors. Background technique

[0002] At present, in the production process of power capacitor manufacturers, vacuum degassing, drying and impregnation of power capacitors are all done by placing the semi-finished products of power capacitors in a vacuum tank and adopting double pumping single injection or group pumping single injection or group pumping soaking method. The impregnation quality of the product is related to the degree of vacuum, temperature and time, especially the degree of vacuum. However, due to the large space of the entire vacuum impregnation system and the fact that there are many air leakage points, it is difficult to ensure the tightness, and all materials will decompose in an extremely high vacuum environment. Gas and liquid media are limited by the existence of saturated vapor pressure and ...

Examples

Embodiment 1

[0026] Embodiment 1: A treatment method for vacuum drying and impregnation of capacitors. This treatment method is based on an impregnation device, which includes a vacuum tank 2 for placing a power capacitor 1 and a vacuum oil storage tank 4 for storing insulating medium oil 3 And be positioned at the small oil sump 5 in the vacuum tank 2 and above the power capacitor 1, a vacuum pump system 6 is connected to the vacuum tank 2 and the power capacitor 1 through an air extraction pipe 7 and an air extraction oil injection pipe 8 respectively; The insulating medium oil 3 in the vacuum oil storage tank 4 is transferred to the small oil tank 5, and the bottom of the small oil tank 5 is connected to the pumping oil injection pipe 8 through an oil injection pipe 10; the outer wall of the power capacitor 1 is provided with an ultrasonic generating part 11a ;

[0027] The processing method comprises the following steps:

[0028] Step 1. Place the power capacitor 1 to be processed in ...

Embodiment 2

[0036] Embodiment 2: A treatment method for vacuum drying and impregnation of capacitors. This treatment method is based on an impregnation device, which includes a vacuum tank 2 for placing a power capacitor 1 and a vacuum oil storage tank 4 for storing insulating medium oil 3 And be positioned at the small oil sump 5 in the vacuum tank 2 and above the power capacitor 1, a vacuum pump system 6 is connected to the vacuum tank 2 and the power capacitor 1 through an air extraction pipe 7 and an air extraction oil injection pipe 8 respectively; The insulating medium oil 3 in the vacuum oil storage tank 4 is transferred to the small oil tank 5, and the bottom of the small oil tank 5 is connected to the pumping oil injection pipe 8 through an oil injection pipe 10;

[0037] The processing method comprises the following steps:

[0038] Step 1. Place the power capacitor 1 to be processed in the vacuum tank 2, and evacuate both the power capacitor 1 and the vacuum tank 2 to form a 0.0...

technical field

[0001] The invention relates to a treatment method for vacuum drying and impregnation of capacitors, belonging to the technical field of power capacitors. Background technique

[0002] At present, in the production process of power capacitor manufacturers, vacuum degassing, drying and impregnation of power capacitors are all done by placing the semi-finished products of power capacitors in a vacuum tank and adopting double pumping single injection or group pumping single injection or group pumping soaking method. The impregnation quality of the product is related to the degree of vacuum, temperature and time, especially the degree of vacuum. However, due to the large space of the entire vacuum impregnation system and the fact that there are many air leakage points, it is difficult to ensure the tightness, and all materials will decompose in an extremely high vacuum environment. Gas and liquid media are limited by the existence of saturated vapor pressure and ...

Examples

Embodiment 1

[0026] Embodiment 1: A treatment method for vacuum drying and impregnation of capacitors. This treatment method is based on an impregnation device, which includes a vacuum tank 2 for placing a power capacitor 1 and a vacuum oil storage tank 4 for storing insulating medium oil 3 And be positioned at the small oil sump 5 in the vacuum tank 2 and above the power capacitor 1, a vacuum pump system 6 is connected to the vacuum tank 2 and the power capacitor 1 through an air extraction pipe 7 and an air extraction oil injection pipe 8 respectively; The insulating medium oil 3 in the vacuum oil storage tank 4 is transferred to the small oil tank 5, and the bottom of the small oil tank 5 is connected to the pumping oil injection pipe 8 through an oil injection pipe 10; the outer wall of the power capacitor 1 is provided with an ultrasonic generating part 11a ;

[0027] The processing method comprises the following steps:

[0028] Step 1. Place the power capacitor 1 to be processed in ...

Embodiment 2

[0036] Embodiment 2: A treatment method for vacuum drying and impregnation of capacitors. This treatment method is based on an impregnation device, which includes a vacuum tank 2 for placing a power capacitor 1 and a vacuum oil storage tank 4 for storing insulating medium oil 3 And be positioned at the small oil sump 5 in the vacuum tank 2 and above the power capacitor 1, a vacuum pump system 6 is connected to the vacuum tank 2 and the power capacitor 1 through an air extraction pipe 7 and an air extraction oil injection pipe 8 respectively; The insulating medium oil 3 in the vacuum oil storage tank 4 is transferred to the small oil tank 5, and the bottom of the small oil tank 5 is connected to the pumping oil injection pipe 8 through an oil injection pipe 10;

[0037] The processing method comprises the following steps:

[0038] Step 1. Place the power capacitor 1 to be processed in the vacuum tank 2, and evacuate both the power capacitor 1 and the vacuum tank 2 to form a 0.0...

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