CN105296108B - A kind of mixed and modified nano-particle transformer oil and preparation method thereof - Google Patents
A kind of mixed and modified nano-particle transformer oil and preparation method thereof Download PDFInfo
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- CN105296108B CN105296108B CN201510719157.4A CN201510719157A CN105296108B CN 105296108 B CN105296108 B CN 105296108B CN 201510719157 A CN201510719157 A CN 201510719157A CN 105296108 B CN105296108 B CN 105296108B
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Abstract
The present invention provides a kind of mixed and modified nano-particle transformer oil and preparation method thereof, mixed by modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil, the volume ratio of the modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil is 1:5‑1:1；Preparation method includes the preparation of modified Nano boron nitride transformer oil, the preparation of modified manometer silicon dioxide transformer oil with mixing three steps.The transformer oil of the present invention has good insulation and heat conductivility, can meet Large Copacity, extra-high voltage grade and the requirement for minimizing power transformer, and device therefor is simple, easy to operate, and large-scale production can be achieved.
Description
Technical field
Chemistry of the invention and technical field of electricity, more particularly to a kind of mixed and modified nano-particle transformer oil and its preparation
Method.
Background technology
A large amount of transformer fault statistical analyses show：Insulation fault is the main reason for influenceing transformer normal operation.Mesh
Preceding large-scale power transformer is mostly oil-immersed power transformer, and transformer oil plays the dual of heat exchange transmission and electric insulation
Effect, therefore, the heat dispersion and insulating properties of transformer oil play certainly to the safety and reliability of transformer longtime running
Qualitative effect.First, with the continuous improvement of voltage class in electricity transmission process, power transformer high electric field, Large Copacity and small-sized
The developing direction of change requires that dielectric has more preferable heat dispersion.The thermal conductivity of traditional transformer oil is smaller, is unfavorable for becoming
The miniaturization of depressor, also need to install cooling device progress forced convertion cooling additional in addition, so that whole transformer is manufactured into
This increase.Secondly, higher and higher voltage class and miniaturization are required to dielectric and must have higher dielectric strength, pass
The transformer oil of system has been increasingly difficult to meet the strict demand of high insulation resistance.Finally, operating transformer, due to
The influence of the factor such as electricity, heat, machinery, chemistry will necessarily cause the aging of transformer oil, often cause hygroscopicity to increase, or because
The water content in dielectric is caused to increase for the decomposition of dielectric, oxidation etc., so as to cause the integral insulation of transformer
It can decline, cooling effect, thermolysis weaken significantly.Aging can cause dielectric chemical property to change toward contact, even
Produce greasy filth block transformer oil circulation canal, influence radiating effect, so as to further speeded up inside transformer part and absolutely
Edge media ages, and generate the debris such as micro- water, gas and particulate and penetrate into oil, the result of vicious circle is to shorten transformer oil
In the life-span of dielectric and equipment, increase the probability that great insulation fault occurs.Therefore, in order to adapt to power transformer great Rong
Amount, extra-high voltage grade and the developing direction of miniaturization, improve the insulation characterisitic of traditional transformer oil longtime running, research insulation
Performance is higher, the more preferable transformer oil of heat conductivility is extremely urgent.
The external starting of research to nano modification insulating oil is more early.Research currently for nano-fluid mainly also focuses on
Nano-fluid thermal conductivity strengthening mechanism and its modeling, the also fewer of development is studied for its electric property.Nanometer technology is exhausted
The application study of edge Material Field is the outer study hotspot of Now Domestic, is the developing direction that insulating material properties make a breakthrough
One of.
The content of the invention
It is an object of the invention to provide a kind of mixed and modified nano-particle transformer oil and preparation method thereof, by two kinds
Nano-particle is modified respectively, is then placed respectively in transformer oil, then two kinds of transformer oil are mixed, and is had well
Insulation and heat conductivility, Large Copacity, extra-high voltage grade and the requirement for minimizing power transformer can be met.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of mixed and modified nano-particle transformer oil, by modified Nano boron nitride transformer oil and modified nano-silica
Silicon transformer oil mixes, the volume of the modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil
Than for 1:5-1:1.
According to above scheme, the modified Nano boron nitride (BN) refers to carry out boron nitride nanometer particle by isopropanol
The modified obtained increased nm-class boron nitride of hydrophobicity, its mass fraction in the modified Nano boron nitride transformer oil are
0.002%-0.02%.
According to above scheme, the modified manometer silicon dioxide (SiO2) refer to by HMDS modified Nano
The increased nano silicon of hydrophobicity obtained after silica, it is in the modified manometer silicon dioxide transformer oil
Mass fraction is 0.1%-2%, and the footpath grain of the nanometer silicon dioxide particle is less than or equal to 7nm.
A kind of preparation method of mixed and modified nano-particle transformer oil, comprises the following steps：
(1) preparation of modified Nano boron nitride transformer oil：Boron nitride nanometer particle is added in isopropanol, it is thin with ultrasound
Born of the same parents' crusher carries out ultrasonic disperse and modification to boron nitride nanometer particle isopropanol mixed liquor, then mixed liquor is carried out gradient from
The heart, collect supernatant；Supernatant is subjected to high speed centrifugation, abandons supernatant, collects the obtained modified Nano nitridation of relatively small particle
Boron, then be dried in vacuo；It is that 1/50000-1/5000 prepares mixing change according to modified Nano boron nitride/transformer oil mass ratio
Depressor oil, after ultrasonic disperse, does further decentralized processing with powerful motor mechanical agitator, obtains modified Nano boron nitride
Transformer oil；
(2) preparation of modified manometer silicon dioxide transformer oil：With HMDS modified manometer silicon dioxide, obtain
To modified manometer silicon dioxide；It is that 1/1000-1/50 prepares mixing change according to modified manometer silicon dioxide/transformer oil mass ratio
Depressor oil, after being stirred by strength mechanical agitator, ultrasonic disperse is carried out, obtains modified manometer silicon dioxide transformer
Oil；
(3) mix：By modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil according to volume ratio
For 1:5-1:1 ratio mixing, product is obtained after the stirring of strength mechanical agitator.
According to above scheme, ultrasonic disperse described in step (1) is carried out with modified in ice-water bath, and the time is 15-40 points
Clock, ultrasonic power 300-450W；The rotating speed of the gradient centrifugation is 2000-3000r/min, centrifugation time 25-40min；
The ultracentrifugal rotating speed is 8000-10000r/min, centrifugation time 4-6min；The powerful motor mechanical agitator
Rotating speed is 1500-2500r/min, mixing time 10-30min.
According to above scheme, the rotating speed of powerful motor mechanical agitator is 1500-2500r/min described in step (2), is stirred
It is 10-30min to mix the time, and the time of the ultrasonic disperse is 5-15min.
The beneficial effects of the invention are as follows：
1) product of the invention is due to the addition of modified BN and SiO2Nano particle, have more compared to traditional transformer oil
Good insulating properties, thermal conductivity and stability；
2) modification of nano particle and scattered device therefor in transformer oil are simple, easy to operate, and big rule can be achieved
Mould produces；
3) the shortcomings that efficiently solving traditional transformer oil, have its insulating properties, thermal conductivity and stability very big
Improve.
Embodiment
Technical scheme is illustrated with reference to embodiment.
Embodiment 1：
The present invention provides a kind of mixed and modified nano-particle transformer oil and preparation method thereof, comprises the following steps：
(1) preparation of modified Nano boron nitride transformer oil：0.1g boron nitride nanometer particles are scattered in 250ml isopropanols
In, ultrasonic 40 minutes (in ice-water bath), ultrasonic power are carried out to BN nano particle isopropanol mixed liquors with ultrasonic cell disrupte instrument
300w；Then to mixed liquor gradient centrifugation, regulation rotating speed is 2000r/min, centrifugation time 40min, collects supernatant；Will be upper
Clear liquid carries out high speed centrifugation, adjusts rotating speed 8000r/min, centrifugation time 6min, abandons supernatant, obtain the nanometer compared with small particle
BN, then it is dried in vacuo, is that 1/10000 preparation is modified transformer oil, ultrasonic disperse according to BN/ transformer oil mass ratio, then use
Powerful motor mechanical agitation does further decentralized processing, speed of agitator 2500r/min, time 10min, obtains modified Nano
BN transformer oil；
(2) preparation of modified manometer silicon dioxide transformer oil：SiO is modified with HMDS2Nano-particle, press
According to SiO2/ transformer oil mass ratio weighs respective quality SiO for 1/1002, then strength mechanical agitation, speed of agitator 1500r/
Min, time 30min, ultrasonic disperse 5min, obtains modified Nano SiO afterwards2Transformer oil；
(3) mix：By modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil according to volume ratio
For 1:1 ratio mixing, product is obtained after the stirring of strength mechanical agitator.
Testing result shows：The dielectric constant of the present embodiment product is 2.3, and current displacement angle tangent value is 0.002 (90
DEG C), breakdown voltage 57kv, other performance indications also composite transformer oil GB2536-90 quality standards, use the change of the present invention
Depressor oil has good insulating properties, thermal conductivity and stability, can extend the service life of transformer, reduces the insulation of transformer
Fault rate.
Embodiment 2：
The present invention provides a kind of mixed and modified nano-particle transformer oil and preparation method thereof, comprises the following steps：
(1) preparation of modified Nano boron nitride transformer oil：0.1g boron nitride nanometer particles are scattered in 250ml isopropanols
In, ultrasonic 15 minutes (in ice-water bath), ultrasonic power are carried out to BN nano particle isopropanol mixed liquors with ultrasonic cell disrupte instrument
450w；Then to mixed liquor gradient centrifugation, regulation rotating speed is 3000r/min, centrifugation time 25min, collects supernatant；Will be upper
Clear liquid carries out high speed centrifugation, adjusts rotating speed 10000r/min, centrifugation time 4min, abandons supernatant, obtain receiving compared with small particle
Rice BN, is then dried in vacuo, and is that 1/5000 preparation is modified transformer oil, ultrasonic disperse according to BN/ transformer oil mass ratio, then use
Powerful motor mechanical agitation does further decentralized processing, speed of agitator 1500r/min, time 30min, obtains modified Nano
BN transformer oil；
(2) preparation of modified manometer silicon dioxide transformer oil：SiO is modified with HMDS2Nano-particle, press
According to SiO2/ transformer oil mass ratio weighs respective quality SiO for 1/10002, then strength mechanical agitation, speed of agitator are
2500r/min, time 10min, ultrasonic disperse 15min, obtains modified Nano SiO afterwards2Transformer oil；
(3) mix：By modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil according to volume ratio
For 1:5 ratio mixing, product is obtained after the stirring of strength mechanical agitator.
Embodiment 3：
The present invention provides a kind of mixed and modified nano-particle transformer oil and preparation method thereof, comprises the following steps：
(1) preparation of modified Nano boron nitride transformer oil：0.1g boron nitride nanometer particles are scattered in 250ml isopropanols
In, ultrasonic 30 minutes (in ice-water bath), ultrasonic power are carried out to BN nano particle isopropanol mixed liquors with ultrasonic cell disrupte instrument
400w；Then to mixed liquor gradient centrifugation, regulation rotating speed is 2500r/min, centrifugation time 30min, collects supernatant；Will be upper
Clear liquid carries out high speed centrifugation, adjusts rotating speed 9000r/min, centrifugation time 5min, abandons supernatant, obtain the nanometer compared with small particle
BN, then it is dried in vacuo, is that 1/50000 preparation is modified transformer oil, ultrasonic disperse according to BN/ transformer oil mass ratio, then use
Powerful motor mechanical agitation does further decentralized processing, speed of agitator 2000r/min, time 20min, obtains modified Nano
BN transformer oil；
(2) preparation of modified manometer silicon dioxide transformer oil：SiO is modified with HMDS2Nano-particle, press
According to SiO2/ transformer oil mass ratio weighs respective quality SiO for 1/502, then strength mechanical agitation, speed of agitator 2000r/
Min, time 20min, ultrasonic disperse 10min, obtains modified Nano SiO afterwards2Transformer oil；
(3) mix：By modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil according to volume ratio
For 1:3 ratio mixing, product is obtained after the stirring of strength mechanical agitator.
Above example is only to illustrative and not limiting technical scheme, although above-described embodiment enters to the present invention
Detailed description is gone, the person skilled of this area should be understood：The present invention can be modified or replaced on an equal basis, but
Any modification and local replacement for not departing from spirit and scope of the invention all should be covered in scope of the presently claimed invention.
Claims (3)
1. a kind of mixed and modified nano-particle transformer oil, it is characterised in that by modified Nano boron nitride transformer oil and modification
Nano silicon transformer oil mixes, the modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformation
The volume ratio of device oil is 1:5-1:1；
The hydrophobicity that the modified Nano boron nitride refers to obtain after being modified boron nitride nanometer particle by isopropanol increases
The nm-class boron nitride added, its mass fraction in the modified Nano boron nitride transformer oil is 0.002%-0.02%；
The modified manometer silicon dioxide refers to the hydrophobicity by being obtained after HMDS modified manometer silicon dioxide
Increased nano silicon, its mass fraction in the modified manometer silicon dioxide transformer oil is 0.1%-2%, described
The footpath grain of nanometer silicon dioxide particle is less than or equal to 7 nm；
The preparation method of the mixed and modified nano-particle transformer oil, comprises the following steps：
（1）The preparation of modified Nano boron nitride transformer oil：Boron nitride nanometer particle is added in isopropanol, with ultrasonic cell powder
Broken instrument carries out ultrasonic disperse and modification to boron nitride nanometer particle isopropanol mixed liquor, then carries out gradient centrifugation to mixed liquor,
Collect supernatant；Supernatant is subjected to high speed centrifugation, abandons supernatant, collects the obtained modified Nano boron nitride of relatively small particle,
It is dried in vacuo again；It is that 1/50000-1/5000 prepares mixing transformation according to modified Nano boron nitride/transformer oil mass ratio
Device oil, after ultrasonic disperse, further decentralized processing is done with powerful motor mechanical agitator, obtains the change of modified Nano boron nitride
Depressor oil；
（2）The preparation of modified manometer silicon dioxide transformer oil：With HMDS modified manometer silicon dioxide, changed
Property nano silicon；It is that 1/1000-1/50 prepares bridge transformer according to modified manometer silicon dioxide/transformer oil mass ratio
Oil, after being stirred by strength mechanical agitator, ultrasonic disperse is carried out, obtains modified manometer silicon dioxide transformer oil；
（3）Mixing：According to volume ratio it is 1 by modified Nano boron nitride transformer oil and modified manometer silicon dioxide transformer oil:
5-1:1 ratio mixing, product is obtained after the stirring of strength mechanical agitator.
2. mixed and modified nano-particle transformer oil according to claim 1, it is characterised in that：Step（1）Described in surpass
Sound is scattered to be carried out with modification in ice-water bath, and the time is 15-40 minutes, ultrasonic power 300-450W；The gradient centrifugation
Rotating speed is 2000-3000r/min, centrifugation time 25-40min；The ultracentrifugal rotating speed is 8000-10000r/min,
Centrifugation time is 4-6min；The rotating speed of the powerful motor mechanical agitator is 1500-2500r/min, mixing time 10-
30min。
3. mixed and modified nano-particle transformer oil according to claim 2, it is characterised in that：Step（2）Described in it is strong
The rotating speed of power mechanical agitator is 1500-2500r/min, and mixing time 10-30min, the time of the ultrasonic disperse is 5-
15min。
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| CN106590834B (en) * | 2016-12-01 | 2019-07-12 | 保定市华远变压器油制造有限公司 | A kind of preparation method of high thermal conductivity transformer oil |
| CN107123493A (en) * | 2017-04-27 | 2017-09-01 | 广东粤特变压器有限公司 | A kind of SiO insulated with good heat conductivity2Nanometer particle-modified vegetable insulating oil and preparation method |
| CN111117723A (en) * | 2019-12-30 | 2020-05-08 | 国网河南省电力公司电力科学研究院 | Preparation method and preparation device of natural ester insulating oil containing nano powder |
| CN114317067A (en) * | 2021-12-03 | 2022-04-12 | 上海应用技术大学 | Nano-silica modified transformer oil and preparation method thereof |
| CN114479990B (en) * | 2022-02-09 | 2022-11-15 | 王旭锋 | Lubricating oil additive and preparation method and application thereof |
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| CN103343029A (en) * | 2013-07-11 | 2013-10-09 | 天津学子电力设备科技有限公司 | Preparation method of heat-conducting transformer oil |
| CN103695098A (en) * | 2013-11-29 | 2014-04-02 | 国网河南省电力公司济源供电公司 | Transformer oil and preparation method thereof |
| CN104130825A (en) * | 2014-07-02 | 2014-11-05 | 马鞍山市万鑫铸造有限公司 | Composite nanoparticle transformer oil with high antirust and insulating properties and preparation method thereof |
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| CN103343029A (en) * | 2013-07-11 | 2013-10-09 | 天津学子电力设备科技有限公司 | Preparation method of heat-conducting transformer oil |
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