CN107599279A - Gapless turn-to-turn insulation dry-type air-core reactor prepares mould and preparation method of sample - Google Patents
Gapless turn-to-turn insulation dry-type air-core reactor prepares mould and preparation method of sample Download PDFInfo
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Abstract
The present invention relates to a kind of gapless turn-to-turn insulation dry-type air-core reactor to prepare mould and preparation method of sample, mould is polyfluortetraethylene plate, polyfluortetraethylene plate is provided with I-shaped mold slots, mold slots include two parallel grooves and one and wire casing, and wire casing is vertical with two grooves respectively and connects, the groove depth of groove is identical with groove width, and wire casing is identical with the groove depth of groove, and the groove width of wire casing is twice of groove groove width, sample manufacture is carried out using mould and by gapless between simultaneously two enamel insulated aluminium wires arranged side by side of wire casing, vacuumized twice in sample manufacturing process simultaneously, to remove the bubble in epoxide-resin glue.Compared with prior art, the present invention has the advantages that knockout course is less prone to insulation deformation damage, avoids turn-to-turn caused by sample deformation itself from gap being present, avoids in sample heating type-approval process the increased situation of turn-to-turn interval that introduces and the more conducively discharge of epoxy inner bubble and then raising measuring accuracy.
Description
Technical field
The present invention relates to dry-type air-core reactor to prepare mould, more particularly, to a kind of gapless turn-to-turn insulation dry-type hollow
Reactor prepares mould and preparation method of sample.
Background technology
It is defeated to be widely used in AC and DC as a kind of reactive-load compensation equipment peace wave apparatus for dry-type air-core reactor
In electric system, its functional reliability is directly connected to the safe for operation of power network.Statistics shows, dry-type air-core reactor more than 60%
Failure be due to that and these dielectric breakdown accidents are often turn-to-turn insulation caused by winding insulation breakdown caused by turn-to-turn short circuit
What defect triggered.Therefore, the electric property of dry-type air-core reactor turn-to-turn insulation, the design for dry-type air-core reactor are studied
With safeguarding, ensureing that reactor safe operation has positive meaning.
Polyester-imide enamel insulated aluminium wire is one of material of coiling dry-type air-core reactor winding, and it is in aluminium base wire surface
One layer of polyester-imide paint is coated, forms enamel-covered wire.The insulation that polyester-imide layer is used between line, its electricity, thermo-chemical stability are preferable.
To study the dielectric properties of polyester-imide enamel insulated aluminium wire and verifying its insulation integrity, the resistance to pressure between polyester-imide enamelled coating is specified
Can be, it is necessary to which sample carries out turn-to-turn pressure test corresponding to making.Demand based on research and experiment is, it is necessary to develop a kind of gapless
Turn-to-turn insulation sample, with exclude turn-to-turn epoxy casting to research and result of the test influence, realize to polyester-imide enamelled coating be situated between
The direct research of electrical property.
Prior art has the following disadvantages：
In the past in the experimental study of polyester-imide enamel insulated aluminium wire insulating properties, making turn-to-turn insulation sample generally use
Epoxy plate or metal die, though above-mentioned material by the fine of surface treatment, also due to the reason for material itself, with asphalt mixtures modified by epoxy resin
Stronger viscosity between fat be present.During making turn-to-turn insulation sample using epoxy plate or metal die, in demoulding link
Sample deformation or discontinuity are caused, it is necessary to large force is completed to be stripped than stronger due to epoxy resin and mould adhesion,
Turn-to-turn insulation tears or existed the sightless microlesion of naked eyes, and the stripping of conductive line surfaces insulated paint is even resulted under serious conditions,
But because aluminum steel is coated by epoxy resin, the situation that insulated paint is peeled off simultaneously is not easy to discover.Turn-to-turn insulation is carried out using the sample to hit
Experiment is worn, then shelf depreciation or breakdown first occur at insulation harm, causes result of the test relatively low.
For the research of polyester-imide enamel insulated aluminium wire insulative dielectric performance and insulation integrity, require to carry out in the case of having
The correlation test of gapless turn-to-turn insulation performance, targetedly to check the electric property of polyester-imide insulating barrier.Herein
On the basis of turn-to-turn insulation voltage ageing and heat ageing research, or integrated survey polyester-imide and epoxy resin compound inslation it is electric
During performance, even more require to remove the air between wire turn, wire is closely affixed, and be coated with epoxy resin insulating layers.In the past
Tie two methods of sizing and mould shape are mainly included to the preparation method of such sample, typing method of tying is by two wires
It is placed side by side, and take several points to be tied up with band along the line, epoxy resin then is coated in conductive line surfaces with band, finally
Vacuum solidification is shaped.Mould shape method makes shaper using epoxy plate or aluminium sheet, and by wire termination bending, middle part is affixed,
It is positioned in mould, the positioning between two wires relies on the fixation of wire termination in a mold, and asphalt mixtures modified by epoxy resin is irrigated in rear mold
Fat glue, last vacuum solidification sizing.There is the defects of similar in above two method, typing method of tying is fixed using multiple spot, mould
Typing method is fixed using wire termination, but because aluminum steel quality itself is softer, and unbalance stress causes in sample manufacturing process
Deformation, can cause can not be brought into close contact between wire, minim gap be present, wherein larger gap can be adjusted in time, but
It is that the gap that part naked eyes are difficult to differentiate will be poured or coat epoxy resin and solidifying and setting with sample, finally to related electric
Result of the test affects greatly.
The typing method of tying used in the past, typically ties up wire with nylon cable tie multiple spot, can lead in sample process
Cross adjustment band mode and ensure that wire is closely affixed gapless, but in wire heats type-approval process, band expanded by heating, draw
Rise two wires between there is minim gap, subsequent outer layer epoxy resin injects the gap, and final solidifying and setting.Curable epoxide processing
Temperature it is higher, then the gap is bigger, but still in the size for being visually not easy to differentiate, tends to be ignored, cause final
Electrical test result is bigger than normal.It is worth noting that, this increase of the turn-to-turn interval as caused by heating cure, it increases degree in phase
With typically having uniformity under treatment conditions, i.e., to carrying out electrical test with a batch of sample, its result of the test has identical
Variation tendency and degree, add the confirmation difficulty of result of the test correctness.
In turn-to-turn insulation sample manufacturing process, there are a large amount of small bubbles in epoxy inner, and these bubbles are usually
Caused by epoxy resin and curing agent whipping process, ensure that bubble is smoothly discharged in sample solidification process, is to ensure that sample
The reliable important prerequisite of electrical test real result.When making turn-to-turn sample using method for shaping of tying, because epoxy resin is consolidated
There is larger viscosity before changing, may result in bubble during vacuum row's bubble is attached on nylon cable tie, it is impossible to smoothly discharge.
And conventional mould shape method, wire doubling part are placed in a more roomy groove, due to epoxide resin vacuum, row steeped
Journey is more slow, depths bubble easily occurs and rests on epoxy inner due to resin solidification in floating-upward process.Above-mentioned feelings
Turn-to-turn retains bubble in the sample that condition may cause to make, and then goes out current situation at bubble first in sample pressure test
Portion discharges, and has a strong impact on that result of the test has effect.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of gapless turn-to-turn is exhausted
Edge dry-type air-core reactor prepares mould and preparation method of sample.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of gapless turn-to-turn insulation dry-type air-core reactor prepares mould, for making gapless turn-to-turn insulation dry type sky
Core device sample, described mould are polyfluortetraethylene plate, and described polyfluortetraethylene plate is provided with I-shaped mold slots, institute
The mold slots stated include two parallel grooves and one and wire casing, and described and wire casing is vertical with two grooves respectively and connects
Logical, the groove depth of described groove is identical with groove width, and described and wire casing is identical with the groove depth of groove, described and wire casing groove width
For twice of groove groove width.
Described and wire casing and two groove connectivity parts are respectively equipped with fillet.
A kind of gapless turn-to-turn insulation dry-type air-core reactor using as described above described in any one prepares the sample of mould
Preparation method, described method comprise the following steps：
S1, epoxide-resin glue is injected into the mold slots of mould, to 2/3 groove depth of mold slots；
S2, by inject epoxide-resin glue mould be put into vacuum tank, vacuumize remove epoxide-resin glue in bubble；
S3, the groove that two identical enamel insulated aluminium wires are embedded in mould and simultaneously in wire casing, make the epoxy resin in mold slots
Glue overflows and covered to above enamel insulated aluminium wire, and the part that enamel insulated aluminium wire exposes mold slots removes surface insulation paint；
S4, mould is placed again into vacuum tank, vacuumizes the residual bubble removed in epoxide-resin glue again；
Dry-type air-core reactor is obtained after S5, stripping operation.
Described enamel insulated aluminium wire diameter is identical with groove groove width.
In S3 by the center section of two identical enamel insulated aluminium wires be embedded in mold slots and in wire casing, and cause each paint
The both ends of alclad line are respectively embedded into groove, and the both ends of same enamel insulated aluminium wire are embedded in two grooves of the same side, make mold slots
In epoxide-resin glue overflow and cover to above enamel insulated aluminium wire.
Vacuum pumping in S2 is evacuated to below 133Pa for room temperature and kept for 15 minutes.
Vacuum pumping in S4 is evacuated to below 133Pa for 50 DEG C and kept for 6 hours.
Described dry-type air-core reactor connects respective electrode when testing, and described electrode includes two copper electrode rods and two
Individual polytetrafluoroethylene (PTFE) supporting plate, the connection parallel with two polytetrafluoroethylene (PTFE) supporting plates respectively of described two copper electrode rods are described
Dry-type air-core reactor be connected respectively with two copper electrode rods.
Described dry-type air-core reactor is provided with the enamel insulated aluminium wire contact of 4 removing surface insulation paints, and described dry type is empty
Core device connects two copper electrode rods by 4 contacts.
Two through holes and two screwed holes are equipped with described each copper electrode rod, described through hole and screwed hole are divided equally
Do not intersect with the copper electrode mandrel heart, described screwed hole direction is vertical with through hole direction, and described enamel insulated aluminium wire contact is inserted respectively
In the through hole for entering copper electrode rod, jackscrew fixation enamel insulated aluminium wire contact is inserted from screwed hole.
Compared with prior art, the present invention has advantages below：
1st, improve in conventional sample knockout course and insulation deformation damage occurs, and then it is true to cause result of the test to deviate
The shortcomings that situation, improve measuring accuracy：It is proposed by the present invention using polytetrafluoroethylene (PTFE) as make sample mould, can be effective
Avoid the deformation damage that insulated in sample knockout course.Polytetrafluoroethylmaterial material is most not easy in conventional engineering material and epoxy resin
It adhesion, after turn-to-turn insulation sample curing molding, can somewhat be come off by external force from mould, be not in insulation deformation damage
Wound, and will not residual epoxy resin in a mold, advantageously ensure that sample repeats the precision in manufacturing process；
The problem of gap be present in turn-to-turn caused by the 2nd, avoiding conventional sample deformation itself：Sample proposed by the present invention makes
Method, the part for requiring on wire to be closely affixed by and the bottom surface of wire casing and two sides be completely fixed, in three polytetrafluoro tables
Under the squeezing action in face, wire is mutually adjacent to and does not stay gap, on wire any deformation be forced to recover, examination has been effectively ensured
The accuracy that sample makes, further, ensure that the correctness of related electric result of the test；
3rd, the increased situation of turn-to-turn interval introduced in conventional sample heating type-approval process is avoided：Examination proposed by the present invention
Sample making process, by the sidewall extrusion wire of polytetrafluoroethylene (PTFE) wire casing, realize and be mutually adjacent between wire.In heating cure process
In, polytetrafluoroethylmaterial material thermal coefficient of expansion itself is low, and deflection is extremely faint, and the deformation direction Direction Line turn-to-turn of mould,
And because polytetrafluoroethylene (PTFE) hardness is less than aluminium, aluminum steel line footpath will not be caused to change, ensure that the accuracy and correlation of sample
The correctness of experimental result；
4th, the mould structure after improving, more conducively epoxy inner bubble are discharged：Sample making side proposed by the present invention
Method, content of epoxy resin is few, and carries out vacuum row's bubble processing prior to offline, and epoxy inner bubble is easily discharged, ensured
Sample internal not bubbles after completing, avoid the shelf depreciation as caused by bubble, and then ensure that correlation test knot
The reliability of fruit.
Brief description of the drawings
Fig. 1 is Teflon mould structural representation；
Fig. 2 is polyester-imide enamel insulated aluminium wire sample schematic diagram；
Fig. 3 is schematic diagram when sample makes；
Fig. 4 is electrode bar schematic diagram；
Fig. 5 is profile at electrode body and screwed hole；
Fig. 6 is polytetrafluoroethylene (PTFE) supporting plate schematic diagram；
Fig. 7 is sample and electrode system structural representation；
Fig. 8 is hookup schematic diagram；
Fig. 9 is the breakdown test result figure of sample made by the inventive method；
Figure 10 is the breakdown test result figure of sample made by typing method of tying；
Figure 11 is the breakdown test result figure of sample made by epoxy plate mould shape method；
1 and wire casing；2nd, the first groove；3rd, the second groove；4 and line segment；5th, left side；6th, right edge；7th, the first aluminum steel；
8th, the second aluminum steel；9th, mould；10th, electrode body；11st, the first locking cap；12nd, the second locking cap；13rd, electrode first through hole；14、
The through hole of electrode second；15th, the first screwed hole；16th, the second screwed hole；17th, mould first through hole；18th, the through hole of mould second；19、
First supporting plate；20th, the second supporting plate；21st, high-field electrode；22nd, ground electrode.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is the part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other reality that those of ordinary skill in the art are obtained on the premise of creative work is not made
Example is applied, should all belong to the scope of protection of the invention.
Embodiment
The present invention is directed to the dry-type air-core reactor of polyester-imide enamel insulated aluminium wire coiling, it is proposed that a kind of gapless turn-to-turn is exhausted
Edge dry-type air-core reactor prepares mould and preparation method of sample, can effectively simulate the turn-to-turn insulation knot of dry-type air-core reactor
Structure, and the research and experiment of reactor turn-to-turn insulation dielectric properties can be completed based on this model.
1st, Teflon mould
Be Teflon mould for making sample as shown in Figure 1, die structure size parameter for 200 × 86 ×
15mm, it is 120mm that a length is milled out at the center of mould long side, width 5.8mm, depth for 2.9mm's and wire casing 1,
It is 2.9mm that the groove both ends mill out width respectively, and depth is 2.9mm the first groove 2 and the second groove 3, and will and wire casing 1 and the
One groove 2 and the second groove 3 are connected with each other round edge of the right angle side milling of position formation into radius for 5mm.
2nd, polyester-imide enamel insulated aluminium wire is handled
It is illustrated in figure 2 polyester-imide enamel insulated aluminium wire sample, aluminium diameter 2.80mm, its surface polyester-imide thickness of paint layer
For 0.05mm, a diameter of 2.90mm enamel insulated aluminium wire is collectively formed.Cut and obtain the sample that length is 260mm, in both side ends
The insulated paint of about 25mm length is polished off respectively, to the follow-up electrical connection realized with electrode.Will according to the size of mold slots
Aluminum steel sample is carefully bent, and adjusts aluminum steel shape, makes simultaneously line segment 4 and 6 perpendicular angle of left side 5 and right edge.By three sections
Line coupling part folding is the circular arc that radius is 6.5mm, and this process can be completed by bender, to improve arc accuracy, really
Protecting aluminum steel can be well embedded in groove.Each group of sample needs two identical aluminum steels.
3rd, sample is shaped
The schematic diagram being illustrated in figure 3 after two aluminum steels are embedded in polytetrafluoro mold slots.Aluminum steel is polyester-imide enamel-cover
Aluminum steel, mould 9 make for polytetrafluoroethylmaterial material.First aluminum steel 7 and the second aluminum steel 8 and line segment be partially disposed in and in wire casing,
Two aluminum steel diameters and equal to doubling well width, therefore under the squeezing action of doubling groove sidewall, the doubling portion of two aluminum steels
Divide and be closely affixed, therebetween without air-gap.The side of first aluminum steel 7 and the second aluminum steel 8 is respectively placed in the first of mould both sides
In the groove 3 of groove 2 and second, aluminum steel diameter is identical with groove width, therefore the first aluminum steel 7 and the second aluminum steel 8 are in embedded mould 9
In after, relative displacement will not be produced by being limited by mould.
4th, epoxy casting and solidification
Before aluminum steel is put into mould, the epoxide-resin glue configured is injected in mold slots with disposable syringe, ring
Oxygen cast height is about the 2/3 of groove depth, is then placed at room temperature in vacuum tank, is evacuated to below 133Pa and continues 15 minutes,
To remove the bubble in epoxide-resin glue.Then aluminum steel is slowly put into mold slots by flow 3, it is ensured that aluminum steel and mold slots it
Between space filled up by epoxy resin, groove epoxy resin can be overflowed by aluminum steel extruding and cover aluminum steel top.It will pour what is be poured in
Sample is positioned in vacuum drying chamber, and below 133Pa is evacuated to after being warming up to 50 DEG C, continues to make epoxy resin cure in 6 hours
Shaping, obtains gapless turn-to-turn insulation model sample.
5th, test electrode and sample installation
The copper electrode rod that experiment uses is illustrated in figure 4, by electrode body 10, the first locking cap 11 and the second locking cap 12
Form.Electrode is made up of brass material, and length 180mm, a diameter of 30mm, both ends processing length is 20mm M14 screw threads, is used
To be threadedly coupled with locking cap.It is to process a diameter of 4mm's respectively at 28.5mm apart from electrode side on electrode body 10
Electrode first through hole 13 and the second through hole of electrode 14, two through hole distance of shaft centers is 123mm and axle center is parallel to each other and by electrode sheet
The axle center of body.Along perpendicular to through hole direction, it is electrode to process M4 the first screwed holes 15 and the second screwed hole 16, hole depth in homonymy
Surface to electrode axle center, the profile at through hole and screwed hole are as shown in Figure 5.
Locking cap length is 24mm, a diameter of 30mm, and a side is poured out to a diameter of 10mm fillet.Non- chamfering side
Along the M14 screw threads that axle center working depth is 15mm.Every electrode matches somebody with somebody two locking caps.
It is illustrated in figure 6 the supporting plate of electric system.The material of supporting plate is polytetrafluoroethylene (PTFE), length 200mm, width
For 160mm, thickness 12mm.In the processing mold first through hole 17 at long side 80mm and the second through hole of mould 18, through hole is straight
Footpath is 15mm, and the short side distance with supporting plate is 28.5mm.
It is as shown in Figure 7 that sample is installed on the schematic diagram after electrode system.Fig. 7 includes the first supporting plate 19 and the second support
Plate 20, high-field electrode 21 and ground electrode 22, the first aluminum steel 7 and the second aluminum steel 8.First supporting plate 19 and the structure of the second supporting plate 20
Identical, high-field electrode 21 is identical with the structure of ground electrode 22.After the threaded portion of electrode passes through the through hole of supporting plate, use
Locking cap screws at electrode body screw thread, electrode is fixed on the supporting plate, two supporting plates and two electrodes collectively form
Test electrode system.Four sides of the turn-to-turn insulation model sample prepared are inserted to four through holes of electrode system respectively
In, two sides of same aluminum steel will be inserted in two through holes of same electrode, adjustment aluminum steel position, make the coating removal of aluminum steel side
Part is completely encased by the through hole of electrode.M4 jackscrew is screwed at the screwed hole of electrode, aluminum steel is fixed on to the through hole of electrode
In.So far, gapless dry-type air-core reactor Insulation Test modelling is completed, you can for carrying out reactor turn-to-turn insulation
Correlation test.
Comparison of test results：
Using method proposed by the present invention, and tie typing method and epoxy plate mould shape method, make three groups of turn-to-turns
Insulate sample, carries out industrial frequency withstand voltage experiment to sample at room temperature, and compared for result of the test.
1st, sample makes
Parameter when sample makes is shown in Table 1：
The sample of table 1 makes parameter list
2nd, testing equipment
It is illustrated in figure 8 the circuit diagram of sample power frequency breakdown test.220V AC powers are given birth to by transformer boosts,
It is applied on sample.Voltage magnitude is controlled by program control pressure regulator, and sample concatenates a fuse, to ensure front end overcurrent protection not
Timely deenergization during action.Pressure instrumentataion is coordinated to survey the voltage magnitude being applied on sample using capacitive divider
Amount.
3rd, test method
After equipment and sample circuit are connected, output voltage amplitude is at the uniform velocity increased to using program control pressure regulator
1200V, rate of rise 100V/s.Staged boosting is then carried out, amplitude of boosting every time is 10V, stops 5s, until sample is sent out
Raw breakdown, then records sample breakdown voltage.
4th, result of the test
As shown in Fig. 9, Figure 10 and Figure 11 be respectively the inventive method, tie typing method and epoxy plate mould shape method it is made
Do the power frequency breakdown test result of sample.The average voltage breakdown that the inventive method manufactures sample is 1415V, typing method of tying
The average voltage breakdown of made sample is 1458V, and the average voltage breakdown of sample is made by epoxy plate mould shape method
1501V.Found from comparison of test results, breakdown test result dispersiveness corresponding to the present invention is smaller, and average voltage breakdown is low.
The breakdown test result dispersiveness tied corresponding to typing method is larger, average voltage breakdown increase about 3%.Epoxy plate mould shape
Breakdown test result corresponding to method is in height differentiation state, and a part of sample breakdown voltage is in 1420V or so, the breakdown of remaining sample
Voltage concentrates on 1600V or so, and its average voltage breakdown is higher by about 6.7% than the sample mean breakdown voltage of the present invention.
The above results show, dry-type air-core reactor turn to turn test preparation method proposed by the present invention, and sample is consistent
Property is good, and preferably reflects the true resistance to voltage levels of turn-to-turn insulation.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replaced
Change, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain be defined.
Claims (10)
1. a kind of gapless turn-to-turn insulation dry-type air-core reactor prepares mould, for making gapless turn-to-turn insulation dry-type hollow
Reactor sample, it is characterised in that described mould is polyfluortetraethylene plate, and described polyfluortetraethylene plate is provided with I-shaped
Mold slots, described mold slots include two parallel grooves and one and wire casing, described and wire casing respectively with two grooves
Vertically and connect, the groove depth of described groove is identical with groove width, the doubling identical, described with the groove depth of groove of described and wire casing
The groove width of groove is twice of groove groove width.
2. a kind of gapless turn-to-turn insulation dry-type air-core reactor according to claim 1 prepares mould, it is characterised in that
Described and wire casing and two groove connectivity parts are respectively equipped with fillet.
A kind of 3. sample that mould is prepared using gapless turn-to-turn insulation dry-type air-core reactor as claimed in claim 1 or 2
Preparation method, it is characterised in that described method comprises the following steps：
S1, epoxide-resin glue is injected into the mold slots of mould, to 2/3 groove depth of mold slots；
S2, by inject epoxide-resin glue mould be put into vacuum tank, vacuumize remove epoxide-resin glue in bubble；
S3, the groove that two identical enamel insulated aluminium wires are embedded in mould and simultaneously in wire casing, make the epoxide-resin glue in mold slots overflow
Go out and cover to above enamel insulated aluminium wire, the part that enamel insulated aluminium wire exposes mold slots removes surface insulation paint；
S4, mould is placed again into vacuum tank, vacuumizes the residual bubble removed in epoxide-resin glue again；
Dry-type air-core reactor is obtained after S5, stripping operation.
4. a kind of preparation method of sample according to claim 3, it is characterised in that described enamel insulated aluminium wire diameter and groove
Groove width is identical.
5. a kind of preparation method of sample according to claim 3, it is characterised in that by two identical enamel insulated aluminium wires in S3
Center section insertion mold slots and in wire casing, and cause each enamel insulated aluminium wire both ends be respectively embedded into groove, same paint
The both ends of alclad line are embedded in two grooves of the same side, are overflowed the epoxide-resin glue in mold slots and are covered to enamel insulated aluminium wire
Top.
6. a kind of preparation method of sample according to claim 3, it is characterised in that the vacuum pumping in S2 is taken out for room temperature
Vacuum to below 133Pa keep 15 minutes.
7. a kind of preparation method of sample according to claim 3, it is characterised in that the vacuum pumping in S4 is taken out for 50 DEG C
Vacuum to below 133Pa keep 6 hours.
A kind of 8. preparation method of sample according to claim 3, it is characterised in that described dry-type air-core reactor test
When connect respective electrode, described electrode includes two copper electrode rods and two polytetrafluoroethylene (PTFE) supporting plates, described two copper
Electrode bar connection parallel with two polytetrafluoroethylene (PTFE) supporting plates respectively, described dry-type air-core reactor respectively with two copper electrodes
Rod connects.
9. a kind of preparation method of sample according to claim 8, it is characterised in that described dry-type air-core reactor is provided with
The enamel insulated aluminium wire contact of 4 removing surface insulation paints, described dry-type air-core reactor connect two copper electrodes by 4 contacts
Rod.
10. a kind of preparation method of sample according to claim 9, it is characterised in that on described each copper electrode rod
Provided with two through holes and two screwed holes, described through hole and screwed hole respectively intersect with the copper electrode mandrel heart, described spiral shell
Pit direction is vertical with through hole direction, and described enamel insulated aluminium wire contact inserts in the through hole of copper electrode rod respectively, from screwed hole
Insert jackscrew and fix enamel insulated aluminium wire contact.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085465A (en) * | 2018-07-03 | 2018-12-25 | 国网黑龙江省电力有限公司电力科学研究院 | A kind of dry-type air-core reactor turn-to-turn insulation thermal aging test method and device |
| CN109613411A (en) * | 2018-12-12 | 2019-04-12 | 国网山东省电力公司电力科学研究院 | A kind of preparation method of external insulation anti-pollution flashover coating electrical insulation properties test sample |
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| CN109613411B (en) * | 2018-12-12 | 2021-03-19 | 国网山东省电力公司电力科学研究院 | Preparation method of test sample for electrical insulation performance of external insulation anti-pollution flashover coating |
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