CN104795255A - Power capacitor vacuum immersion process - Google Patents
Power capacitor vacuum immersion process Download PDFInfo
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- CN104795255A CN104795255A CN201510158878.2A CN201510158878A CN104795255A CN 104795255 A CN104795255 A CN 104795255A CN 201510158878 A CN201510158878 A CN 201510158878A CN 104795255 A CN104795255 A CN 104795255A
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Abstract
The invention discloses a power capacitor vacuum immersion process. The power capacitor vacuum immersion process includes lowering the internal temperature of a power capacitor to 70-80 DEG C, and increasing the gas partial pressure vacuum degree in a vacuum tank to 0.5-1Pa gradually; starting ultrasonic wave generation components on the outer wall of the power capacitor, lowering the internal temperature of the power capacitor to 40-60 DEG C, and lowering the gas partial pressure vacuum degree in the vacuum tank to 0.2-0.5Pa; filling a shell of the power capacitor with insulating dielectric oil slowly for 8-22 hours; after the power capacitor is filled with the insulating dielectric oil, keeping a ultrasonic wave opening state, lowering the internal temperature of the power capacitor and keeping the internal temperature at 30-40 DEG C, wherein the ultrasonic wave generation components are arranged on two opposite sides of the outer wall of the power capacitor or on the periphery of the power capacitor. The power capacitor vacuum immersion process has the advantages that gas blended in the insulating dielectric oil is squeezed out easily, production efficiency of power capacitor products is improved, and production energy consumption and cost are reduced.
Description
Technical field
The present invention relates to a kind of power capacitor vacuum impregnation technique, belong to power capacitor technical field.
Background technology
Present power capacitor manufacturing enterprise in process of production, power capacitor vacuum degassing, dry is all be placed in vacuum tank by power capacitor semi-finished product to adopt black soy sauce list to note or group's drawsheet is noted or group takes out the processing method of immersion type with impregnation process, product impregnating effect and vacuum degree, temperature and time about especially and vacuum degree closely related, but because the space by whole vacuum impregnation system is larger, the many sealings of gas leakage point are difficult to ensure, all material all can gassing under extra-high vacuum environment, liquid medium has the restriction of saturated vapor pressure existence and the final vacuum of vacuum equipment own, so the raising of vacuum degree is limited, existing equipment attainable vacuum partial pressure is by force 0.1Pa, therefore properties of product are improved close to its limit by gas clean-up, capacitor element solid dielectric interlayer gap is very little on the other hand, generally only has 0.5 ~ 1.5 μm, and liquid medium has certain viscosity simultaneously, as enclosed solid dielectric interlayer and a little low vacuum gas (bubble) between solid dielectric and aluminium foil layer by liquid medium, now just be difficult to squeezed out and filled by liquid medium, the main purpose of power capacitor vacuum impregnation process capacitor element solid dielectric interlayer and the air between dielectric layer and pole plate aluminium foil layer is supplanted completely and filled by high-quality liquid medium, if and solid dielectric interlayer and have between medium and aluminium foil layer bubble exist that bubble that I guess only a few is such exist all will have a strong impact on quality and the life-span of power capacitor, again, in prior art, applicant thinks that dielectric oil does not fully infiltrate with solid dielectric, thus limit product performance improves further, again, the dielectric oil of power capacitor has certain viscosity, now just be difficult to be squeezed out as enclosed solid dielectric layer and a little low vacuum gas (bubble) between solid and aluminium foil layer by liquid medium and filled by liquid medium, and if solid dielectric interlayer and have bubble to there is the existence of that property bubble that I guess only a few is such between solid dielectric and aluminium foil layer all will to have a strong impact on quality and the life-span of power capacitor.Again, existing power capacitor vacuum impregnation processing procedure about need 72h ~ 96h time general longer, production efficiency is lower, energy consumption is large and the deficiency of deficiency in economic performance.
Summary of the invention
The object of this invention is to provide a kind of power capacitor vacuum impregnation technique, this processing method is conducive to the gas incorporated in dielectric oil, more easily squeezed out by edge Medium Oil inclosure solid dielectric interlayer and a little low vacuum gas (bubble) in the local between medium and aluminium foil layer and filled by dielectric oil, and be conducive to dielectric oil with power capacitor in solid dielectric fully infiltrate with swelling, the inner micro-survival gas of further emptying condenser dielectric, thus greatly improve power capacitor properties of product quality, life-span and production efficiency, reduce energy consumption and cost.
For achieving the above object, the technical solution used in the present invention is: a kind of power capacitor vacuum impregnation technique, this vacuum impregnation technique is based on an immersion system, this immersion system comprising vacuum tank for placing power capacitor, storing the vacuum oil storage tank of dielectric oil and being positioned at vacuum tank and little oil groove above power capacitor, and a vacuum pump system is connected to vacuum tank and power capacitor respectively by exhaust tube and oil fuel tube of bleeding; One oil guide pipe will be transferred in little oil groove from dielectric oil in described vacuum tank, will be connected with bleeding between oil fuel tube bottom described little oil groove by an oil fuel tube; Described power capacitor outer wall is provided with ultrasonic wave generation part;
The treating method comprises following steps:
Step one, pending power capacitor to be positioned in described vacuum tank, and power capacitor and vacuum tank inside are all vacuumized, thus form 0.09MPa vacuum chamber;
Step 2, under the condition of step one, carried out by power capacitor being heated to 80 DEG C ~ 90 DEG C, heating time is 12h;
Step 3, power capacitor internal temperature is down to 70 DEG C ~ 80 DEG C, in described vacuum tank, gas partial pressure vacuum degree progressively brings up to 0.5 ~ 1Pa, holds time as 12h;
Step 4, unlatching are positioned at the ultrasonic wave generation part of described power capacitor outer wall, and power capacitor internal temperature is down to 40 DEG C ~ 60 DEG C, in described vacuum tank, vacuum degree progressively brings up to gas partial pressure is 0.2 ~ 0.5Pa, slowly inject dielectric oil with in described power capacitor casing, the duration is 18 ~ 22h simultaneously;
Step 5, after power capacitor inside fills described dielectric oil, the ultrasonic wave generation part opening of described power capacitor outer wall is positioned at described in maintenance, power capacitor internal temperature is reduced and maintains 30 DEG C ~ 40 DEG C, in described vacuum tank, vacuum degree control is at gas partial pressure 0.2 ~ 0.5Pa, duration 6 ~ 8h;
Step 6, by below power capacitor internal cooling to 30 DEG C, open vacuum breaker bottom valve and communicate with air, power capacitor is gone out tank and fill oil and oil filler point is carried out encapsulation process;
Describedly be arranged in little oil groove dielectric oil and be provided with ultrasonic wave generation part, in described step 4 and step 5, open the ultrasonic wave generation part being arranged in little oil groove dielectric oil simultaneously; The both sides that described little oil groove outer wall is relative are provided with ultrasonic wave generation part or surrounding is provided with ultrasonic wave generation part, in described step 4 and step 5, open the ultrasonic wave generation part being positioned at little oil groove outer wall simultaneously;
The both sides that described power capacitor outer wall is relative are provided with ultrasonic wave generation part or surrounding is provided with ultrasonic wave generation part.
In technique scheme, further improvement project is as follows:
In such scheme, in described step 4, ultrasonic frequency is 20 kHz ~ 500kHz, and in step 5, ultrasonic frequency is 20 kHz ~ 500kHz.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1, power capacitor vacuum impregnation technique of the present invention, it is 40 DEG C ~ 60 DEG C in temperature, in vacuum tank under vacuum degree about 0.2 ~ 0.5Pa condition, when slowly injecting dielectric oil in described power capacitor casing, open the ultrasonic wave generation part being positioned at described power capacitor outer wall and little oil groove dielectric oil, inner and the little oil groove formation ultrasonic wave at power capacitor, utilize hyperacoustic cavitation, the gas incorporated in dielectric oil is conducive to than prior art, and capacitor element solid dielectric interlayer and the air between solid dielectric layer and pole plate aluminium foil layer are more thoroughly got rid of.
2, power capacitor vacuum impregnation technique of the present invention, it is after filling described dielectric oil in power capacitor inside, the ultrasonic wave generation part opening of described power capacitor outer wall is positioned at described in maintenance, power capacitor internal temperature is reduced and maintains 30 DEG C ~ 40 DEG C, in described vacuum tank, vacuum degree control is at gas partial pressure about 0.2 ~ 0.5Pa, duration 6 ~ 8h; Utilize ultrasonic wave to be vibrated under the effect of sound wave by the micro-gas core cavitation bubble in dielectric oil, (generally need reach 10W/cm when acoustic pressure reaches certain value
2) time occur growth and collapse (breaking), generally comprise 3 stages: the formation of cavitation bubble, to grow up and violent collapse (breaking), after the power capacitor filling with dielectric oil passes into ultrasonic wave, produce ten hundreds of micro-bubbles due to liquid vibration, i.e. cavitation bubble.The negative pressuren zone growth that these bubbles are formed in ultrasonic wave longitudinal propagation, and zone of positive pressure rapid closing (namely collapse is broken), thus be constantly compressed and stretching action under lengthwise oscillations ripple alternately positive and negative pressure, can easily be squeezed out by being dissolved in liquid medium or by liquid medium inclosure solid dielectric interlayer and a little low vacuum gas (bubble) in the local between medium and aluminium foil layer and being filled by high-quality liquid medium, thus greatly to be improved power capacitor properties of product quality and life-span.Also can improve the production efficiency of power capacitor product, reduce energy consumption and cost.
3, power capacitor vacuum impregnation technique of the present invention, overcome the difficulty that power capacitor dielectric oil viscosity height brings to removal steam and gas, the power of dielectric oil flow can be awarded, thus improve further to get rid of capacitor element solid dielectric interlayer and the air between solid dielectric layer and pole plate aluminium foil layer and be conducive to dielectric oil and fully infiltrate with fully swelling with solid dielectric in power capacitor.
4, power capacitor vacuum impregnation technique of the present invention, its little oil groove outer wall is provided with ultrasonic wave generation part, in described step 4 and step 5, open the ultrasonic wave generation part being positioned at little oil groove outer wall simultaneously, so that the liquid medium entering power capacitor inside is fully degassed in advance, thus be conducive to getting rid of further capacitor element solid dielectric interlayer and the air between solid dielectric layer and pole plate aluminium foil layer more thoroughly and perfect.
Accompanying drawing explanation
Accompanying drawing 1 is the immersion system structure chart implementing processing method of the present invention.
In above accompanying drawing: 1, power capacitor; 2, vacuum tank; 3, dielectric oil; 4, vacuum oil storage tank; 5, little oil groove; 6, vacuum pump system; 7, exhaust tube; 8, to bleed oil fuel tube; 9, oil guide pipe; 10, oil fuel tube; 11a, ultrasonic wave generation part; 11b, ultrasonic wave generation part.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1: a kind of power capacitor vacuum impregnation technique, this vacuum impregnation technique is based on an immersion system, this immersion system comprising vacuum tank 2 for placing power capacitor 1, storing the vacuum oil storage tank 4 of dielectric oil 3 and being positioned at vacuum tank 2 and little oil groove 5, vacuum pump system 6 above power capacitor 1 is connected to vacuum tank 2 and power capacitor 1 respectively by exhaust tube 7 and oil fuel tube 8 of bleeding; One oil guide pipe 9 will be transferred in little oil groove 5 from dielectric oil 3 in described vacuum oil storage tank 4, will be connected with bleeding between oil fuel tube 8 bottom described little oil groove 5 by an oil fuel tube 10; Described power capacitor 1 outer wall is provided with ultrasonic wave generation part 11a;
The treating method comprises following steps:
Step one, pending power capacitor 1 to be positioned in described vacuum tank 2, and power capacitor 1 and vacuum tank 2 inside are all vacuumized, thus form 0.09MPa vacuum chamber;
Step 2, under the condition of step one, carried out being heated to 80 DEG C ~ 90 DEG C by power capacitor 1, heating time is 12h;
Step 3, power capacitor 1 internal temperature is down to 70 DEG C ~ 80 DEG C, in described vacuum tank 2, gas partial pressure vacuum degree progressively brings up to about 0.5 ~ 1Pa, holds time as 12h;
Step 4, unlatching are positioned at the ultrasonic wave generation part of described power capacitor 1 outer wall, and power capacitor 1 internal temperature is down to 40 DEG C ~ 60 DEG C, in described vacuum tank 2, vacuum degree progressively brings up to gas partial pressure about 0.2 ~ 0.5Pa, slowly inject dielectric oil with in described power capacitor 1 housing, the duration is 18 ~ 22h simultaneously;
Step 5, after power capacitor 1 inside fills described dielectric oil, the ultrasonic wave generation part 11a opening of described power capacitor 1 outer wall is positioned at described in maintenance, power capacitor 1 internal temperature is reduced and maintains 30 DEG C ~ 40 DEG C, in described vacuum tank 2, vacuum degree control is at gas partial pressure about 0.2 ~ 0.5Pa, duration 6 ~ 8h;
Step 6, by below power capacitor 1 internal cooling to 30 DEG C, open vacuum breaker bottom valve and communicate with air, power capacitor 1 is gone out tank and fill oil and oil filler point is carried out encapsulation process.
In above-mentioned steps four, ultrasonic frequency is 20kHz ~ 500kHz, and in step 5, ultrasonic frequency is 20kHz ~ 500kHz.
The above-mentioned relative both sides of power capacitor 1 outer wall of stating are provided with ultrasonic wave generation part 11a or surrounding is provided with ultrasonic wave generation part 11a.
Embodiment 2: a kind of power capacitor vacuum impregnation technique, this vacuum impregnation technique is based on an immersion system, this immersion system comprising vacuum tank 2 for placing power capacitor 1, storing the vacuum oil storage tank 4 of dielectric oil 3 and being positioned at vacuum tank 2 and little oil groove 5, vacuum pump system 6 above power capacitor 1 is connected to vacuum tank 2 and power capacitor 1 respectively by exhaust tube 7 and oil fuel tube 8 of bleeding; One oil guide pipe 9 will be transferred in little oil groove 5 from dielectric oil 3 in described vacuum oil storage tank 4, will be connected with bleeding between oil fuel tube 8 bottom described little oil groove 5 by an oil fuel tube 10;
The treating method comprises following steps:
Step one, pending power capacitor 1 to be positioned in described vacuum tank 2, and power capacitor 1 and vacuum tank 2 inside are all vacuumized, thus form 0.09MPa vacuum chamber;
Step 2, under the condition of step one, carried out being heated to 80 DEG C ~ 90 DEG C by power capacitor 1, heating time is 12h;
Step 3, power capacitor 1 internal temperature is down to 70 DEG C ~ 80 DEG C, in described vacuum tank 2, gas partial pressure vacuum degree progressively brings up to about 0.5 ~ 1Pa, holds time as 12h;
Step 4, unlatching are positioned at the ultrasonic wave generation part of described power capacitor 1 outer wall, and power capacitor 1 internal temperature is down to 40 DEG C ~ 60 DEG C, in described vacuum tank 2, vacuum degree progressively brings up to gas partial pressure about 0.2 ~ 0.5Pa, slowly inject dielectric oil with in described power capacitor 1 housing, the duration is 18 ~ 22h simultaneously;
Step 5, after power capacitor 1 inside fills described dielectric oil, the ultrasonic wave generation part 11a opening of described power capacitor 1 outer wall is positioned at described in maintenance, power capacitor 1 internal temperature is reduced and maintains 30 DEG C ~ 40 DEG C, in described vacuum tank 2, vacuum degree control is at gas partial pressure about 0.2 ~ 0.5Pa, duration 6 ~ 8h;
Step 6, by below power capacitor 1 internal cooling to 30 DEG C, open vacuum breaker bottom valve and communicate with air, power capacitor 1 is gone out tank and fill oil and oil filler point is carried out encapsulation process.
Above-mentionedly be arranged in little oil groove 5 dielectric oil and be provided with ultrasonic wave generation part 11b, in described step 4 and step 5, open the ultrasonic wave generation part 11b being arranged in little oil groove 5 dielectric oil simultaneously.
In above-mentioned steps four, ultrasonic frequency is 20kHz ~ 500kHz, and in step 5, ultrasonic frequency is 20kHz ~ 500kHz.
Above-mentioned be arranged in little oil groove 5 dielectric oil ultrasonic wave generation part 11b produce ultrasonic frequency be 20kHz ~ 500kHz, described in be positioned at described power capacitor 1 outer wall ultrasonic wave generation part 11a produce ultrasonic frequency be 20kHz ~ 500kHz.
The both sides that above-mentioned power capacitor 1 outer wall is relative are provided with ultrasonic wave generation part 11a or surrounding is provided with ultrasonic wave generation part 11a.
The both sides that above-mentioned little oil groove 5 outer wall is relative are provided with ultrasonic wave generation part 11b or surrounding is provided with ultrasonic wave generation part 11 b, in described step 4 and step 5, open the ultrasonic wave generation part 11b being positioned at little oil groove 5 outer wall simultaneously.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (2)
1. a power capacitor vacuum impregnation technique, it is characterized in that: this processing method is based on an immersion system, this immersion system comprising vacuum tank (2) for placing power capacitor (1), storing the vacuum oil storage tank (4) of dielectric oil (3) and being positioned at vacuum tank (2) and little oil groove (5) above power capacitor (1), and a vacuum pump system (6) is connected to vacuum tank (2) and power capacitor (1) respectively by exhaust tube (7) and oil fuel tube of bleeding (8); One oil guide pipe (9) will be transferred in little oil groove (5) from described vacuum tank (2) interior dielectric oil (3), and described little oil groove (5) bottom is connected by an oil fuel tube (10) with between oil fuel tube of bleeding (8); Described power capacitor (1) outer wall is provided with ultrasonic wave generation part (11a);
The treating method comprises following steps:
Step one, pending power capacitor (1) to be positioned in described vacuum tank (2), and power capacitor (1) and vacuum tank (2) inside are all vacuumized, thus form 0.09MPa vacuum chamber;
Step 2, under the condition of step one, carried out being heated to 80 DEG C ~ 90 DEG C by power capacitor (1), heating time is 12h;
Step 3, power capacitor (1) internal temperature is down to 70 DEG C ~ 80 DEG C, the interior gas partial pressure vacuum degree of described vacuum tank (2) progressively brings up to 0.5 ~ 1Pa, holds time as 12h;
Step 4, unlatching are positioned at the ultrasonic wave generation part (11a) of described power capacitor (1) outer wall, and power capacitor (1) internal temperature is down to 40 DEG C ~ 60 DEG C, it is 0.2 ~ 0.5Pa that described vacuum tank (2) interior vacuum degree progressively brings up to gas partial pressure, slowly inject dielectric oil with in described power capacitor (1) housing, the duration is 18 ~ 22h simultaneously;
Step 5, after power capacitor (1) inside fills described dielectric oil, ultrasonic wave generation part (11a) opening of described power capacitor (1) outer wall is positioned at described in maintenance, power capacitor (1) internal temperature is reduced and maintains 30 DEG C ~ 40 DEG C, described vacuum tank (2) interior vacuum degree control at gas partial pressure 0.2 ~ 0.5Pa, duration 6 ~ 8h;
Step 6, by below power capacitor (1) internal cooling to 30 DEG C, open vacuum breaker bottom valve and communicate with air, power capacitor (1) is gone out tank and fills oil and oil filler point is carried out encapsulation process;
Described little oil groove (5) the dielectric oil that is arranged in is provided with ultrasonic wave generation part (11b), in described step 4 and step 5, opens the ultrasonic wave generation part (11b) being arranged in little oil groove (5) dielectric oil simultaneously; The both sides that described little oil groove (5) outer wall is relative are provided with ultrasonic wave generation part (11b) or surrounding and are provided with ultrasonic wave generation part (11 b), in described step 4 and step 5, open the ultrasonic wave generation part (11b) being positioned at little oil groove (5) outer wall simultaneously;
The both sides that described power capacitor (1) outer wall is relative are provided with ultrasonic wave generation part (11a) or surrounding is provided with ultrasonic wave generation part (11a).
2. power capacitor vacuum impregnation technique according to claim 1, is characterized in that: in described step 4, ultrasonic frequency is 20 kHz ~ 500kHz, in step 5, ultrasonic frequency is 20 kHz ~ 500kHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510158878.2A CN104795255B (en) | 2012-08-28 | 2012-08-28 | Power capacitor vacuum impregnation technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210309052.8A CN102856084B (en) | 2012-08-28 | 2012-08-28 | For the processing method of capacitor vacuumize dipping |
| CN201510158878.2A CN104795255B (en) | 2012-08-28 | 2012-08-28 | Power capacitor vacuum impregnation technique |
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| CN201210309052.8A Division CN102856084B (en) | 2012-08-28 | 2012-08-28 | For the processing method of capacitor vacuumize dipping |
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| CN104795255B CN104795255B (en) | 2018-02-02 |
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| CN201510159167.7A Active CN104795257B (en) | 2012-08-28 | 2012-08-28 | The impregnation method of power capacitor |
| CN201510158949.9A Active CN104795256B (en) | 2012-08-28 | 2012-08-28 | Manufacturing process for power capacitor |
| CN201510158878.2A Active CN104795255B (en) | 2012-08-28 | 2012-08-28 | Power capacitor vacuum impregnation technique |
| CN201210309052.8A Expired - Fee Related CN102856084B (en) | 2012-08-28 | 2012-08-28 | For the processing method of capacitor vacuumize dipping |
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Cited By (1)
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| CN107403691A (en) * | 2017-06-21 | 2017-11-28 | 珠海格力新元电子有限公司 | Oiling control method, oiling machine, processor and storage medium |
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| CN104795257B (en) * | 2012-08-28 | 2018-04-06 | 苏州工业园区和顺电气股份有限公司 | The impregnation method of power capacitor |
| CN103500670B (en) * | 2013-09-07 | 2016-04-20 | 芜湖市金诚电子有限责任公司 | A kind of impulse type vacuum impregnation processing method of low pressure self-healing type parallel condenser |
| CN103531357B (en) * | 2013-10-14 | 2016-08-10 | 正泰电气股份有限公司 | Power capacitor and manufacture method thereof |
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- 2012-08-28 CN CN201510159167.7A patent/CN104795257B/en active Active
- 2012-08-28 CN CN201510158949.9A patent/CN104795256B/en active Active
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- 2012-08-28 CN CN201210309052.8A patent/CN102856084B/en not_active Expired - Fee Related
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| CN107403691B (en) * | 2017-06-21 | 2019-08-27 | 珠海格力电器股份有限公司 | Oiling control method, oiling machine, processor and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104795256B (en) | 2018-04-06 |
| CN104795257B (en) | 2018-04-06 |
| CN102856084B (en) | 2015-08-19 |
| CN104795256A (en) | 2015-07-22 |
| CN104795257A (en) | 2015-07-22 |
| CN102856084A (en) | 2013-01-02 |
| CN104795255B (en) | 2018-02-02 |
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