CN108022746A - It is dry to become high-tension coil pouring technology - Google Patents
It is dry to become high-tension coil pouring technology Download PDFInfo
- Publication number
- CN108022746A CN108022746A CN201711493694.7A CN201711493694A CN108022746A CN 108022746 A CN108022746 A CN 108022746A CN 201711493694 A CN201711493694 A CN 201711493694A CN 108022746 A CN108022746 A CN 108022746A
- Authority
- CN
- China
- Prior art keywords
- coil
- pouring
- cast
- vacuum
- blanking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/24—Feeding the material into the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/42—Casting under special conditions, e.g. vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/711—Coils
Abstract
The present invention relates to the dry change high-tension coil pouring technology of one kind, include the following steps：First epoxy resin A/B expect two components be put into curing oven toast 80 DEG C preheat 34 it is small when after, preheated oxygen tree fat A/B is expected into mixing tank, is stirred, deaerates；Cast is filled and molded coil is preheated and dried；Dried coil is hung and is pushed on vacuum pouring tank flat car, pouring can door is then shut and carries out next procedure；Very negative pneumatics power is oozed after the completion of the dwell time, pressurize 40 minutes after 2 kilograms of pressure of positive pressure of just pressurizeing, after normal pressure is laid down after the completion of the dwell time, opens pouring can door knob and pour the coil being poured in and hang next procedure is carried out on curing oven flat car；Coil casting complete；The present invention makes coil one-pass molding after cast, paints without polishing；Coil processing quality is improved, makes the coil surface that processes smooth, pore-free, shrinking percentage reduces, so as to reduce partial discharge amount.
Description
Technical field
The invention belongs to transformer technology field, and in particular to one kind is dry to become high-tension coil pouring technology.
Background technology
Transformer coil plays a crucial role the operational reliability of transformer, is needed to adapt to modern society
Will, the pressure-resistant and insulating properties of transformer coil is improved, meets high-new product requirement, it is ensured that product quality is imperative, and mesh
Be difficult to ensure that product quality and appearance during the cast of preceding dry-type transformer coil, there are it is pressure-resistant, insulating properties is low, local easily electric leakage, is fitted
With scope it is small the problems such as；Traditional dry-type transformer coil epoxy casting technique, typically by the asphalt mixtures modified by epoxy resin in mould material
Fat and curing agent are according to 1:Coil is poured into a mould after 1 proportioning parts by weight mixing, although to the technique in casting process during production
Parameter request can be different there are some, but conventionally produced dry-type transformer coil processing quality can not often ensure,
There is stomata, brightless on surface, it is therefore desirable to add the process polished, repair, painted again, but with longer working time, paint
It can be peeled off by oxidation, the quality of coil surface be influenced, so as to influence product quality drawn game high-volume.
For above technical problem, therefore need to make improvements.
The content of the invention
The technical problem to be solved in the present invention is that overcoming the deficiencies of the prior art and provide a kind of dry high-tension coil that becomes pours into a mould
Technique, can reach coil and pour into a mould smooth, surface-brightening, and pore-free reduces the shrinking percentage of material, so as to reduce local put
Electricity.
In order to reach object above, the technical solution adopted in the present invention is：One kind is dry to become high-tension coil pouring technology, its
It is characterized in that：Include the following steps：
Step 1：First epoxy resin A/B expect two components be put into curing oven toast 80 DEG C preheat 3-4 it is small when after, preheated
Oxygen tree fat A/B is expected into mixing tank, is stirred, is deaerated；
Step 2：Cast is filled and molded coil is preheated and dried；
Step 3：Dried coil is hung and is pushed on vacuum pouring tank flat car, pouring can door is then shut and carries out down
Procedure；
Step 4：The upper end that cast tap hose is fixed on to casting moulds feed inlet fixes；
Step 5：Open pouring can pumped vacuum systems to be vacuumized, 45-65 DEG C of temperature in mixing tank, by production requirement dosage
By epoxy resin and curing agent by weight 1:1.5-1:Ratio between 2.5 is vacuumized, but open to entering in mixing tank
Dynamic mixer is stirred, and mixing time is allowed to stir evenly when being 0.5~1 small；
Step 6：When vacuum is extracted into 100~150Pa in mixing tank, determine with deaerate no bubble could to coil into
Row cast；
Step 7：After coil, which all pours, to be filled, static 20~30 minutes under state, vacuumized when vacuum to 100~
After 150Pa, in vacuum negative pressure state pressurize 40 minutes；
Step 8：Very negative pneumatics power is oozed after the completion of the dwell time, just pressurize 40 minutes after pressurization 2 kilograms of pressure of positive pressure, work as guarantor
After laying down normal pressure after the completion of the pressure time, open pouring can door knob and pour the coil being poured in and hang lower road is carried out on curing oven flat car
Process；Coil casting complete.
In step 4,75 DEG C of temperature in vacuum pouring tank.
In step 6, when pouring into a mould blanking will blanking at a slow speed, cast blanking velocity general control at 40~50 minutes.
In step 6, when pouring into a mould blanking must section blanking, coil cast is closed into baiting valve when material has descended half
Static 5 minutes of door, then coil cast height is shut off blanking valve by blanking at a slow speed again.
The beneficial effects of the invention are as follows：
The present invention makes coil one-pass molding after cast, paints without polishing；Coil processing quality is improved, makes the coil processed
Surface is smooth, pore-free, and shrinking percentage reduces, so as to reduce partial discharge amount.
Embodiment
Embodiment：
First, check vacuum pouring system whether there is gas leakage, whether various instrumentations are normal, and whether pipeline is unimpeded, if it find that
Problem notifies the relevant personnel at once and carries out maintenance.
First epoxy resin A/B expect two components be put into curing oven toast 80 DEG C preheat 3-4 it is small when after, preheated oxygen tree
Fat A/B is expected into mixing tank, is stirred, is deaerated；Cause that the viscosity of material is larger, mobility is poor if environment temperature is relatively low
When, used after being liquefied in the environment of 35 DEG C.
Epoxide-resin glue is as a kind of generally more fixations and the damage of local dielectric applied to conductor of insulating materials
In renovation technique.Using changed between the insulating properties of epoxide-resin glue, liquid or solid high plasticity, solid-state when rigidity and corrosion resistant
The features such as corrosion, applied in the insulation performance reinforcement process of stator coil end, come solve overhang insulation layer consistency it is not high,
The defects of moisture-sensitive, greatly improve the quality of insulation of motor.The fixation of epoxide-resin glue is used as by the use of alkali-free glass fibre band
Material, the characteristics such as the pull resistance after the insulating properties of alkali-free glass fibre band, heat-shrinkable, fire line and dipping lacquer are all applied to
In the end manufacture craft of stator coil, not only met the insulating requirements of end turn, but fully demonstrated its economy and
Operate practicality.
The work car for being loaded with molded coil is promoted in vacuum pouring filling, takes the transparent heat resistant plastic pipe (100 of suitable length
DEG C) be connected on cast valve and locked with pipe collar.Plastic tube is put in pour mass away from bottom about 150mm or so, and uses binding strap
Gate spool is fixed on casting mold, checks that errorless rear close pours into a mould filling door.
Epoxy resin and curing agent in traditional its mould material of dry transformer pouring technique are all according to 1:1 weight
Part mixing is measured, the present inventor is found surprisingly that when epoxy resin and curing agent ratio are 1:1.5 to 1:When between 2.5,
More preferably, the effect that coil is poured into a mould out is more preferable for the trickling property of mould material；Epoxy resin in the present embodiment is bisphenol-A epoxy
Resin, curing agent are isomerized methyltetrahydro (or hexahydro) phthalic anhydrides.
Open pouring can pumped vacuum systems to be vacuumized, 45-65 DEG C of temperature in mixing tank will by production requirement dosage
100 parts by weight of epoxy resin and 150 parts by weight of curing agent are stirred and pour into mixing tank, are vacuumized, but start and stir
The machine of mixing is stirred, and mixing time is allowed to stir evenly when being 0.5~1 small；Finally it is subject to material surface bubble-free；Pouring into a mould
First 5 minutes, vacuum valve is closed, stops stirring, after vacuum reaches technological requirement, starts agitating device and is continuously evacuated to
Material surface bubble-free.
When pouring into a mould blanking will blanking at a slow speed, cast blanking velocity general control at 40~50 minutes, pour into a mould blanking when can
Section blanking is wanted, coil cast is closed into blanking valve static 5 minutes when material has descended half, then coil is poured in blanking at a slow speed again
Note height is shut off blanking valve, it is noted that observing the sealing situation of coil die, in casting process in casting process such as
Fruit finds that seepage of resin horse back closes blanking valve, and releasing cast fills vacuum, after opening cast filling door is handled, takes out again true
Sky reaches Process Planning definite value, then is poured into a mould.
After coil, which all pours, to be filled, static 20~30 minutes under state, vacuumized when vacuum to 100~
After 150Pa, in vacuum negative pressure state pressurize 40 minutes.Vacuum is slowly released after standing.Cast is opened after releasing vacuum
Door is filled, situation after-teeming is fallen after rise to above-mentioned requirements height according to liquid level, work car is released and is transferred to curing oven progress curing process.
Very negative pneumatics power is oozed after the completion of the dwell time, just pressurize 40 minutes after pressurization 2 kilograms of pressure of positive pressure, when pressurize
Between after the completion of lay down normal pressure after, open pouring can door knob and pour the coil being poured in and hang lower road work is carried out on curing oven flat car
Sequence；If after running gate system cleaning, it when unused time is small more than 72, must again be cleaned before cast, allow pipeline in nature
Used under environment after abundant drying.
For coil cast, the following aspects is mainly reflected in：
1st, mold performance is required high.Mould had not only been required to ensure consistency for a long time under high temperature, high vacuum, but also necessary
Ensure good thermal conductivity, it is ensured that cast presses, is quick.The casting mold of stainless steel is used in above-mentioned pouring technology, can
To reduce the deformation of casting process coil, it is ensured that the circularity and surface quality of coil cast.Coil pours between ensuring different-diameter
The concentricity of note, is smoothly set with after ensureing coil casting complete.
2nd, the batch mixing stirring in casting process is required high.It is required that guarantee stirs evenly, fully, can ensure subsequently to pour
Bubble-free produces during note, fully ensures that casting quality.
When batch mixing stirs, it is necessary to assure temperature and vacuum, under conditions of temperature and vacuum is reached, are fully stirred
Mix, deaerate, so just can guarantee that bubble-free produces in follow-up casting process, ensures casting quality.
3rd, it is stringent to the duration of pouring, temperature and vacuum degree control.Cast must be completed before the deadline, just can guarantee that
Pour into a mould abundant, full.The particularly vacuum pouring stage, it is necessary to which control cast flow, completes cast at the appointed time, could really
It is uniform, full to protect cast.
During vacuum pouring, it is necessary to which temperature and vacuum as defined in reaching, during cast, control flow, uniformly, linear pour
Note, makes entirely cast smooth.After casting complete, to continue to ensure temperature and vacuum, so just can guarantee that cast is uniform, full
It is full.
4th, there must be solidify afterwards technique.After casting complete, curing, it is desirable to ensure the mechanical strength of whole coil, it is just necessary
Solidify afterwards processing is carried out at high temperature, just be can guarantee that 2 layer line circle mechanical strengths being cast in together are good, is met properties of product need
Ask.
The curing in relatively previous stage, after coil sloughs mould, is cured again, solidification temperature higher, evenly,
By the solidify afterwards of more than 10 hours, thoroughly ensure coil sizing, mechanical strength is good.
Pin for purposes of this application, has the following advantages that according to the reactor winding that above-mentioned pouring technology obtains：
1. cast is abundant, uniform, bubble-free, electric property is good.By strictly control temperature in casting process, vacuum,
Time and cast flow, fully ensure that coil pours into a mould abundant, uniform, bubble-free.
2. mechanical strength is good.Handled by prolonged solidify afterwards, fully ensured that the mechanical strength of product.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention；Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (4)
1. dry change high-tension coil pouring technology, it is characterised in that：Include the following steps：
Step 1：First epoxy resin A/B expect two components be put into curing oven toast 80 DEG C preheat 3-4 it is small when after, preheated
Oxygen tree fat A/B is expected into mixing tank, is stirred, is deaerated；
Step 2：Cast is filled and molded coil is preheated and dried；
Step 3：Dried coil is hung and is pushed on vacuum pouring tank flat car, pouring can door is then shut and carries out down
Procedure；
Step 4：The upper end that cast tap hose is fixed on to casting moulds feed inlet fixes；
Step 5：Open pouring can pumped vacuum systems to be vacuumized, 45-65 DEG C of temperature in mixing tank, by production requirement dosage
By epoxy resin and curing agent by weight 1:1.5-1:Ratio between 2.5 is vacuumized, but open to entering in mixing tank
Dynamic mixer is stirred, and mixing time is allowed to stir evenly when being 0.5~1 small；
Step 6：When vacuum is extracted into 100~150Pa in mixing tank, determine with deaerate no bubble could to coil into
Row cast；
Step 7：After coil, which all pours, to be filled, static 20~30 minutes under state, vacuumized when vacuum to 100~
After 150Pa, in vacuum negative pressure state pressurize 40 minutes；
Step 8：Very negative pneumatics power is oozed after the completion of the dwell time, just pressurize 40 minutes after pressurization 2 kilograms of pressure of positive pressure, work as guarantor
After laying down normal pressure after the completion of the pressure time, open pouring can door knob and pour the coil being poured in and hang lower road is carried out on curing oven flat car
Process；Coil casting complete.
2. dry change high-tension coil pouring technology according to claim 1, it is characterised in that：In step 4, vacuum pouring
75 DEG C of temperature in tank.
3. dry change high-tension coil pouring technology according to claim 1, it is characterised in that：In step 6, poured down pouring
During material will blanking at a slow speed, cast blanking velocity control at 40~50 minutes.
4. dry change high-tension coil pouring technology according to claim 1, it is characterised in that：In step 6, poured down pouring
During material must section blanking, coil cast is closed into blanking valve static 5 minutes when material has descended half, then blanking will at a slow speed again
Coil cast height is shut off blanking valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711493694.7A CN108022746A (en) | 2017-12-31 | 2017-12-31 | It is dry to become high-tension coil pouring technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711493694.7A CN108022746A (en) | 2017-12-31 | 2017-12-31 | It is dry to become high-tension coil pouring technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108022746A true CN108022746A (en) | 2018-05-11 |
Family
ID=62072210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711493694.7A Pending CN108022746A (en) | 2017-12-31 | 2017-12-31 | It is dry to become high-tension coil pouring technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108022746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962585A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | A kind of continuous disk-type winding pouring technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103905A1 (en) * | 2014-01-07 | 2015-07-16 | 中国科学院宁波材料技术与工程研究所 | Method for improving magnetic performance of sintered neodymium-iron-boron permanent magnet |
| CN104875311A (en) * | 2015-04-24 | 2015-09-02 | 江苏天利机电有限公司 | Production and pouring method of dry type transformer coil |
-
2017
- 2017-12-31 CN CN201711493694.7A patent/CN108022746A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015103905A1 (en) * | 2014-01-07 | 2015-07-16 | 中国科学院宁波材料技术与工程研究所 | Method for improving magnetic performance of sintered neodymium-iron-boron permanent magnet |
| CN104875311A (en) * | 2015-04-24 | 2015-09-02 | 江苏天利机电有限公司 | Production and pouring method of dry type transformer coil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962585A (en) * | 2018-07-19 | 2018-12-07 | 德阳新源电器有限责任公司 | A kind of continuous disk-type winding pouring technology |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20180511 |