CN102842441A - Immersion treatment process for power capacitor - Google Patents
Immersion treatment process for power capacitor Download PDFInfo
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- CN102842441A CN102842441A CN2012103091766A CN201210309176A CN102842441A CN 102842441 A CN102842441 A CN 102842441A CN 2012103091766 A CN2012103091766 A CN 2012103091766A CN 201210309176 A CN201210309176 A CN 201210309176A CN 102842441 A CN102842441 A CN 102842441A
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Abstract
The invention discloses a process method for capacitor vacuum drying immersion. The process method comprises the steps of heating a power capacitor to 80 DEG C to 90 DEG C, gradually improving the temperature in the power capacitor to70 DEG C to 80 DEG C and vacuum degree in a vacuum pot to 0.5 Pa to 1 Pa, starting ultrasonic wave generating parts arranged on the outer wall of the power capacitor and the interior and the exterior of a large oil tank (5) and lowering the temperature in the power capacitor to 40 DEG C to 60 DEG C and gas partial pressure in the vacuum pot to 0.2 Pa to 0.5 Pa, pouring insulating medium oil to the large oil tank and slowly pouring the insulating medium oil into a case of the power capacitor, and maintaining a starting state of the ultrasonic wave and controlling the temperature in the power capacitor to be 30 DEG C to 40 DEG C and the gas partial pressure of the vacuum degree in the vacuum pot to be about 0.2 Pa to 0.5 Pa after the interior of the power capacitor is filled with the insulating medium oil. The process method for the capacitor vacuum drying immersion is beneficial for dissolving gas into the insulating medium oil, and easily exhausts little local low vacuum gas sealed between solid medium layers and aluminum foil layers by the insulating medium oil.
Description
Technical field
The present invention relates to a kind of impregnation process technology of power capacitor, belong to the power capacitor technical field.
Background technology
Power capacitor manufacturing enterprise in process of production now; Power capacitor vacuum degassing, drying and impregnation process all are the power capacitor semi-finished product to be placed on adopt the processing method that the black soy sauce list is annotated or the crowd takes out single notes or the crowd takes out immersion type in the vacuum tank; Product impregnating effect and vacuum degree, temperature and time are relevant especially closely related with vacuum degree; But, gas leakage point many sealings big because of the space that receives whole vacuum impregnation system are difficult to guarantee, all material all can gassing under the XHV environment, liquid medium has saturated vapor pressure to exist and the restriction of 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 improves properties of product near its limit through gas clean-up; Capacitor element solid dielectric interlayer slit is very little on the other hand; Generally has only 0.5～1.5 μ m; And liquid medium has certain viscosity simultaneously; As being enclosed a little the low vacuum gas (bubble) between solid dielectric interlayer and solid dielectric and aluminium foil layer by liquid medium; Filled by liquid medium with regard to being difficult to squeezed out this moment; The main purpose that the power capacitor vacuum impregnation is handled is that the air between capacitor element solid dielectric interlayer and dielectric layer and pole plate aluminium foil layer is supplanted fully and filled by the high-quality liquid medium, and if have between solid dielectric interlayer and medium and aluminium foil layer bubble exist that I guess the such bubble existence of only a few all will have a strong impact on the quality and the life-span of power capacitor; Once more, the applicant thinks that dielectric oil and solid dielectric fully do not soak in the prior art, thereby the restriction properties of product further improve; Once more; The dielectric oil of power capacitor has certain viscosity; A little low vacuum gas (bubble) as being enclosed by liquid medium between solid dielectric layer and solid and aluminium foil layer is squeezed out and is filled by liquid medium with regard to being difficult to this moment, and if have between solid dielectric interlayer and solid dielectric and aluminium foil layer bubble exist that I guess the such bubble existence of only a few all will have a strong impact on the quality and the life-span of power capacitor.Once more, existing power capacitor vacuum impregnation processing procedure needs general length of 72h～96h time approximately, production efficiency is lower, energy consumption is big and the deficiency of deficiency in economic performance.
Summary of the invention
The impregnation process technology that the purpose of this invention is to provide a kind of power capacitor; The gas that this impregnation process technology helps dissolving in the dielectric oil, be insulated the medium oil sealing and go into a little low vacuum gas (bubble) of part between solid dielectric interlayer and medium and aluminium foil layer and squeezed out more easily and fill by dielectric oil; And helping dielectric oil fully soaks into and swelling with the interior solid dielectric of power capacitor; The inner micro-survival gas of further emptying condenser dielectric; Thereby improve power capacitor properties of product quality, life-span and production efficiency greatly, reduce energy consumption and cost.
For achieving the above object; The technical scheme that the present invention adopts is: a kind of impregnation process technology of power capacitor; This impregnation process technology is based on an immersion system; This immersion system comprises the vacuum oil storage tank of the vacuum tank that is used to place power capacitor, storage dielectric oil and is used to soak the big oil groove of power capacitor that one vacuum pump system is connected to vacuum tank through exhaust tube; One oil guide pipe will be transferred in the big oil groove from dielectric oil in the said vacuum tank; One bleed oil fuel tube upper outlet be higher than liquid level in the said big oil groove; This oil fuel tube under shed of bleeding is connected with power capacitor, on the oil fuel tube of bleeding, offers pouring orifice near the power capacitor position; Said power capacitor outer wall is provided with the ultrasonic wave generation part;
The treating method comprises following steps:
Step 1, pending power capacitor is put in the big oil groove, and power capacitor and vacuum tank inside are all vacuumized, thereby form the 0.09MPa vacuum chamber;
Step 5, after said dielectric oil is filled with in power capacitor inside; Keep the said ultrasonic wave generation part opening that is positioned at said power capacitor outer wall; The power capacitor internal temperature is reduced and maintains 30 ℃～40 ℃; Vacuum degree control is at the about 0.2～0.5Pa of gas partial pressure, duration 6～8h in the said vacuum tank;
Step 6, with below the power capacitor internal cooling to 30 ℃, open vacuum breaker bottom valve and atmosphere, power capacitor is gone out jar to mend full oil and oil filler point is carried out encapsulation process.
Further improvement project is following in the technique scheme:
1. in the such scheme, saidly be arranged in big oil groove dielectric oil and be provided with the ultrasonic wave generation part, in said step 4 and the step 5, open the ultrasonic wave generation part that is arranged in big oil groove dielectric oil simultaneously.
2. in the such scheme, ultrasonic frequency is 20kHz～500kHz in the said step 4, and ultrasonic frequency is 20kHz～500kHz in the step 5.
3. in the such scheme; The said ultrasonic frequency that is arranged in big oil groove dielectric oil ultrasonic wave generation part generation is 20kHz～500kHz, and the ultrasonic frequency that the said ultrasonic wave generation part that is positioned at said power capacitor outer wall produces is 20kHz～500kHz.
4. in the such scheme, the relative both sides of said power capacitor outer wall are provided with the ultrasonic wave generation part or are provided with the ultrasonic wave generation part all around.
5. in the such scheme, the relative both sides of said big oil groove outer wall are provided with the ultrasonic wave generation part or are provided with the ultrasonic wave generation part all around, in said step 4 and the step 5, open the ultrasonic wave generation part that is positioned at big oil groove outer wall simultaneously.
Because the technique scheme utilization, the present invention compared with prior art has advantage and effect:
1, the impregnation process technology of power capacitor of the present invention; In temperature is 40 ℃～60 ℃; Under the interior about 0.2～0.5Pa condition of vacuum degree of vacuum tank; Inject dielectric oil and follow the slow dielectric oil that injects in said power capacitor housing to big oil groove, open the ultrasonic wave generation part that is positioned at said power capacitor outer wall, at the inner formation of power capacitor ultrasonic wave; Utilize cavitation effect of ultrasonic waves, gas that helps dissolving in the dielectric oil than prior art and the air between capacitor element solid dielectric interlayer and solid dielectric layer and pole plate aluminium foil layer are more thoroughly got rid of.
2, the impregnation process technology of power capacitor of the present invention; It is after filling with said dielectric oil in power capacitor inside; Keep the said ultrasonic wave generation part opening that is positioned at said power capacitor outer wall; The power capacitor internal temperature is reduced and maintains 30 ℃～40 ℃, and vacuum degree control is at the about 0.2～0.5Pa of gas partial pressure, duration 6～8h in the said vacuum tank; Utilize ultrasonic wave that the little gas nuclear cavitation bubble in the dielectric oil is vibrated under the effect of sound wave, (generally need reach 10W/cm when acoustic pressure reaches certain value
2) time; The growth and the collapse (breaking) that take place generally comprise 3 stages: the formation of cavitation bubble, grow up and violent collapse (breaking), after the power capacitor that fills with dielectric oil feeds ultrasonic wave; Owing to liquid vibration produces ten hundreds of micro-bubbles, i.e. cavitation bubble.The negative pressuren zone growth that these bubbles form in the ultrasonic wave longitudinal propagation; And zone of positive pressure rapid closing (i.e. collapse is broken); Thereby replace under the positive negative pressure at the extensional vibration ripple and constantly to be compressed and stretching action; So that will be dissolved in the liquid medium or enclosed a little low vacuum gas (bubble) of part between solid dielectric interlayer and medium and aluminium foil layer by liquid medium and can squeezed out easily and fill, thereby improve greatly power capacitor properties of product quality and life-span by the high-quality liquid medium.Also the power capacitor production efficiency of products be can improve, energy consumption and cost reduced.
3, the impregnation process technology of power capacitor of the present invention; Overcome power capacitor with the high difficulty of bringing for removal steam and gas of dielectric oil viscosity; Can award the power of dielectric oil flow, thereby further improve the air got rid of between capacitor element solid dielectric interlayer and solid dielectric layer and pole plate aluminium foil layer and help dielectric oil and fully soak into swelling abundant with the interior solid dielectric of power capacitor.
4, the impregnation process technology of power capacitor of the present invention; Be provided with the ultrasonic wave generation part in the liquid in its big oil groove outer wall and the big oil groove; In said step 4 and the step 5; Open the ultrasonic wave generation part that is arranged in big oil groove outer wall and big oil groove liquid simultaneously, thereby the air that helps further getting rid of between capacitor element solid dielectric interlayer and solid dielectric layer and pole plate aluminium foil layer reaches more thoroughly with perfect.
Description of drawings
Accompanying drawing 1 is the immersion system structure chart of embodiment of the present invention impregnation process technology.
In the above accompanying drawing: 1, power capacitor; 2, vacuum tank; 3, dielectric oil; 4, vacuum oil storage tank; 5, big oil groove; 6, vacuum pump system; 7, exhaust tube; 8, the oil fuel tube of bleeding; 9, oil guide pipe; 10, pouring orifice; 11a, ultrasonic wave generation part; 11b, ultrasonic wave generation part; 11c, ultrasonic wave generation part.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment 1: a kind of impregnation process technology of power capacitor; This impregnation process technology is based on an immersion system; Big oil groove 5, one vacuum pump systems 6 that this immersion system comprises the vacuum oil storage tank 4 of the vacuum tank 2 that is used to place power capacitor 1, storage dielectric oil 3 and is used to soak power capacitor 1 are connected to vacuum tank through exhaust tube 7; One oil guide pipe 9 will be transferred in the big oil groove 5 from dielectric oil 3 in the said vacuum oil storage tank 4; One bleed oil fuel tube 8 upper outlet be higher than liquid levels in the said big oil groove 5; These oil fuel tube 8 under sheds of bleeding are connected with power capacitor 1, on the oil fuel tube 8 of bleeding, offer pouring orifice 10 near power capacitor 1 position; Said power capacitor 1 outer wall is provided with ultrasonic wave generation part 11a;
The treating method comprises following steps:
Step 1, pending power capacitor 1 is put in the big oil groove 5, and power capacitor 1 and vacuum tank 2 inside are all vacuumized, thereby form the 0.09MPa vacuum chamber;
Step 5, after said dielectric oil is filled with in power capacitor 1 inside; Keep the said ultrasonic wave generation part 11a opening that is positioned at said power capacitor 1 outer wall; Power capacitor 1 internal temperature is reduced and maintains 30 ℃～40 ℃; Vacuum degree control is at the about 0.2～0.5Pa of gas partial pressure, duration 6～8h in the said vacuum tank 2;
Step 6, with below power capacitor 1 internal cooling to 30 ℃, open vacuum breaker bottom valve and atmosphere, power capacitor 1 is gone out jar to mend full oil and oil filler point is carried out encapsulation process.
Ultrasonic frequency is 20kHz～500kHz in the above-mentioned steps four, and ultrasonic frequency is 20kHz～500kHz in the step 5.
The relative both sides of above-mentioned power capacitor 1 outer wall are provided with ultrasonic wave generation part 11a or are provided with ultrasonic wave generation part 11a all around.
Embodiment 2: a kind of impregnation process technology of power capacitor; This impregnation process technology is based on an immersion system; Big oil groove 5, one vacuum pump systems 6 that this immersion system comprises the vacuum oil storage tank 4 of the vacuum tank 2 that is used to place power capacitor 1, storage dielectric oil 3 and is used to soak power capacitor 1 are connected to vacuum tank through exhaust tube 7; One oil guide pipe 9 will be transferred in the big oil groove 5 from dielectric oil 3 in the said vacuum oil storage tank 4; One bleed oil fuel tube 8 upper outlet be higher than said big oil groove 5 liquid levels; These oil fuel tube 8 under sheds of bleeding are connected with power capacitor 1, on the oil fuel tube 8 of bleeding, offer pouring orifice 10 near power capacitor 1 position; Said power capacitor 1 outer wall is provided with ultrasonic wave generation part 11a;
The treating method comprises following steps:
Step 1, pending power capacitor 1 is put in the big oil groove 5, and power capacitor 1 and vacuum tank 2 inside are all vacuumized, thereby form the 0.09MPa vacuum chamber;
Step 5, after said dielectric oil is filled with in power capacitor 1 inside; Keep the said ultrasonic wave generation part 11a opening that is positioned at said power capacitor 1 outer wall; Power capacitor 1 internal temperature is reduced and maintains 30 ℃～40 ℃; Vacuum degree control is at the about 0.2～0.5Pa of gas partial pressure, duration 6～8h in the said vacuum tank 2;
Step 6, with below power capacitor 1 internal cooling to 30 ℃, open vacuum breaker bottom valve and atmosphere, power capacitor 1 is gone out jar to mend full oil and oil filler point is carried out encapsulation process.
Above-mentionedly be arranged in big oil groove 5 dielectric oil and be provided with ultrasonic wave generation part 11b, in said step 4 and the step 5, open the ultrasonic wave generation part 11b that is arranged in big oil groove 5 dielectric oil simultaneously.
Ultrasonic frequency is 20kHz～500kHz in the above-mentioned steps four, and ultrasonic frequency is 20kHz～500kH in the step 5.
The above-mentioned ultrasonic frequency that is arranged in big oil groove 5 dielectric oil ultrasonic wave generation part 11b generation is 20kHz～500kH, and the ultrasonic frequency that the said ultrasonic wave generation part 11a that is positioned at said power capacitor 1 outer wall produces is 20kHz～500kH.
The relative both sides of above-mentioned power capacitor 1 outer wall are provided with ultrasonic wave generation part 11a or are provided with ultrasonic wave generation part 11a all around.
The relative both sides of above-mentioned big oil groove 5 outer walls are provided with ultrasonic wave generation part 11c or are provided with ultrasonic wave generation part 11c all around, in said step 4 and the step 5, open the ultrasonic wave generation part 11c that is positioned at big oil groove 5 outer walls simultaneously.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. the impregnation process technology of a power capacitor; It is characterized in that: this impregnation process technology is based on an immersion system; This immersion system comprises the vacuum oil storage tank (4) of the vacuum tank (2) that is used to place power capacitor (1), storage dielectric oil (3) and is used to soak the big oil groove (5) of power capacitor (1) that a vacuum pump system (6) is connected to vacuum tank through exhaust tube (7); One oil guide pipe (9) will be transferred in the big oil groove (5) from the interior dielectric oil of said vacuum oil storage tank (4) (3); One bleed oil fuel tube (8) upper outlet be higher than the oil fuel tube liquid level of bleeding in the said big oil groove (5); This oil fuel tube of bleeding (8) under shed is connected with power capacitor (1), goes up at the oil fuel tube of bleeding (8) and offers pouring orifice (10) near power capacitor (1) position; Said power capacitor (1) outer wall is provided with ultrasonic wave generation part (11a);
The treating method comprises following steps:
Step 1, pending power capacitor (1) is soaked in big oil groove (5), and power capacitor (1) and vacuum tank (2) inside are all vacuumized, thereby form the 0.09MPa vacuum chamber;
Step 2, under the condition of step 1, power capacitor (1) is heated to 80 ℃～90 ℃, be 12h heating time;
Step 3, power capacitor (1) internal temperature is reduced to 70 ℃～80 ℃, the interior gas partial pressure vacuum degree of said vacuum tank (2) is progressively brought up to about 0.5～1Pa, and holding time is 12h;
Step 4, unlatching are positioned at the ultrasonic wave generation part of said power capacitor (1) outer wall; And power capacitor (1) internal temperature reduced to 40 ℃～60 ℃; It is 0.2～0.5Pa that the interior vacuum degree of said vacuum tank (2) is progressively brought up to gas partial pressure; Inject dielectric oil (3) and follow the slow dielectric oil that injects in said power capacitor (1) housing to big oil groove (5) simultaneously, the duration is 18～22h;
Step 5, after said dielectric oil is filled with in power capacitor (1) inside; Keep said ultrasonic wave generation part (11a) opening that is positioned at said power capacitor (1) outer wall; Power capacitor (1) internal temperature is reduced and maintains 30 ℃～40 ℃; The interior vacuum degree control of said vacuum tank (2) is at the about 0.2～0.5Pa of gas partial pressure, duration 6～8h;
Step 6, with below power capacitor (1) internal cooling to 30 ℃, open vacuum breaker bottom valve and atmosphere, power capacitor (1) is gone out jar to mend full oil and oil filler point is carried out encapsulation process.
2. impregnation process technology according to claim 1; It is characterized in that: said big oil groove (5) the dielectric oil that is arranged in is provided with ultrasonic wave generation part (11b); In said step 4 and the step 5, open the ultrasonic wave generation part (11b) that is arranged in big oil groove (5) dielectric oil simultaneously.
3. impregnation process technology according to claim 1 is characterized in that: ultrasonic frequency is 20kHz～500kHz in the said step 4, and ultrasonic frequency is 20kHz～500kHz in the step 5.
4. impregnation process technology according to claim 1; It is characterized in that: the said ultrasonic frequency that is arranged in big oil groove (5) dielectric oil ultrasonic wave generation part (11b) generation is 20kHz～500kHz, and the ultrasonic frequency that the said ultrasonic wave generation part (11a) that is positioned at said power capacitor (1) outer wall produces is 20kHz～500kHz.
5. impregnation process technology according to claim 1 is characterized in that: the relative both sides of said power capacitor (1) outer wall are provided with ultrasonic wave generation part (11a) or are provided with ultrasonic wave generation part (11a) all around.
6. impregnation process technology according to claim 1; It is characterized in that: the relative both sides of said big oil groove (5) outer wall are provided with ultrasonic wave generation part (11c) or are provided with ultrasonic wave generation part (11 c) all around; In said step 4 and the step 5, open the ultrasonic wave generation part (11c) that is positioned at big oil groove (5) outer wall simultaneously.
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| CN201210309176.6A CN102842441B (en) | 2012-08-28 | 2012-08-28 | The impregnation process technique of power capacitor |
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| CN201210309176.6A CN102842441B (en) | 2012-08-28 | 2012-08-28 | The impregnation process technique of power capacitor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617896A (en) * | 2013-11-19 | 2014-03-05 | 上海思源电力电容器有限公司 | Maintenance method for power capacitor |
| CN105575683A (en) * | 2014-10-13 | 2016-05-11 | 武陟县电业总公司 | Capacitor transformation method dipping technology |
| RU2699365C1 (en) * | 2018-10-10 | 2019-09-05 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Method of filling high-voltage electrotechnical devices with liquid dielectric and device for its implementation |
| CN110624763A (en) * | 2019-10-12 | 2019-12-31 | 张家港市益成机械有限公司 | Ultrasonic vacuum pressure paint dipping machine |
| CN112435873A (en) * | 2020-11-25 | 2021-03-02 | 无锡锡源真空设备有限公司 | Vacuum impregnation tank |
| CN114694983A (en) * | 2022-01-20 | 2022-07-01 | 上海琪瑜光电科技股份有限公司 | Vacuum impregnation process of self-healing pulse capacitor |
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| CN2353059Y (en) * | 1998-12-03 | 1999-12-08 | 合阳电力电容器制造有限责任公司 | Apparatus for filling oil into oil-container capacitor |
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| CN101121159A (en) * | 2007-09-18 | 2008-02-13 | 成都宏明电子股份有限公司 | Impregnation forming method for capacitor core assembly |
| CN101950642A (en) * | 2010-09-16 | 2011-01-19 | 中国电力科学研究院 | Vacuum insulation oil impregnating device and method thereof |
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| GB807746A (en) * | 1955-12-22 | 1959-01-21 | Gen Electric | Improvements relating to impregnation processes |
| CN2353059Y (en) * | 1998-12-03 | 1999-12-08 | 合阳电力电容器制造有限责任公司 | Apparatus for filling oil into oil-container capacitor |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103617896A (en) * | 2013-11-19 | 2014-03-05 | 上海思源电力电容器有限公司 | Maintenance method for power capacitor |
| CN103617896B (en) * | 2013-11-19 | 2016-04-27 | 上海思源电力电容器有限公司 | A kind of method for maintaining of power capacitor |
| CN105575683A (en) * | 2014-10-13 | 2016-05-11 | 武陟县电业总公司 | Capacitor transformation method dipping technology |
| RU2699365C1 (en) * | 2018-10-10 | 2019-09-05 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Method of filling high-voltage electrotechnical devices with liquid dielectric and device for its implementation |
| CN110624763A (en) * | 2019-10-12 | 2019-12-31 | 张家港市益成机械有限公司 | Ultrasonic vacuum pressure paint dipping machine |
| CN112435873A (en) * | 2020-11-25 | 2021-03-02 | 无锡锡源真空设备有限公司 | Vacuum impregnation tank |
| CN114694983A (en) * | 2022-01-20 | 2022-07-01 | 上海琪瑜光电科技股份有限公司 | Vacuum impregnation process of self-healing pulse capacitor |
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