CN109166722A - A kind of technique improving oil-immersed transformer coil mechanical strength - Google Patents
A kind of technique improving oil-immersed transformer coil mechanical strength Download PDFInfo
- Publication number
- CN109166722A CN109166722A CN201811093771.4A CN201811093771A CN109166722A CN 109166722 A CN109166722 A CN 109166722A CN 201811093771 A CN201811093771 A CN 201811093771A CN 109166722 A CN109166722 A CN 109166722A
- Authority
- CN
- China
- Prior art keywords
- coil
- vacuum
- mechanical strength
- insulating varnish
- immersed transformer
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- 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.)
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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
-
- 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
- H01F41/12—Insulating of windings
- H01F41/125—Other insulating structures; Insulating between coil and core, between different winding sections, around the coil
-
- 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
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
Abstract
The invention discloses a kind of techniques for improving oil-immersed transformer coil mechanical strength, belong to transformer technology field, comprising: 1, select and be capable of the low-temperature setting insulating varnish of transformer oil resistant；2, the coil that coiling is completed is put into vacuum tank, is dried in vacuo；3, after reaching the process time, the insulating varnish that will be mixed according to the ratio in advance pours leaching in coil surface by certain flow rate, the length of leaching time is poured according to the control of the size of coil；4, dry in vacuum tank, time and vacuum degree are controlled, realizes vacuum solidification.One aspect of the present invention considers the ability of production equipment, on the one hand takes into account the complexity of worker operation again.By a kind of insulating varnish of transformer oil resistant, utilize vacuum pouring system, realize paint leaching, vacuum impregnation, vacuum solidification and the vacuum drying of coil, make coil under the cementation of varnish, it is higher as an intensity, the bigger entirety of density, while the software feature of insulating varnish can play certain buffer function again.
Description
Technical field
The invention belongs to transformer technology field more particularly to a kind of works for improving oil-immersed transformer coil mechanical strength
Skill.
Background technique
It is well known that oil-immersed transformer, also known as oil immersed type testing transformer.1000kVA and the above oil-immersed transformer,
Outdoor type signal thermometer must be installed, and distant signal can be connect.800kVA and the above oil-immersed transformer should fill gas relay
And pressure protective device, 800kVA or less oil-immersed transformer according to requirements, with manufactory negotiate, can also install gas after
Electric appliance.Dry-type transformer should be provided by manufactory, install temperature measuring device, generally 630kVA and the installing of the above transformer.
Product classification is distinguished according to the number of phases of single transformer, can be divided into three-phase transformer and single-phase transformer.In three-phase power
In system, it is normally applied three-phase transformer, it, can also be in three-phase electrical power system when capacity is excessive and is limited by traffic condition
Transformer group is formed using three single-phase type transformers.
Currently, the superiority and inferiority of oil-immersed transformer coil processing, is not only related to load loss, short-circuit impedance etc. and is critical to
Element more directly affects its ability for bearing short-circuit impact, although having other modes to can be improved coil machinery in technique at present
Intensity, but security risk is still remained, so it is mechanical that this paper presents a kind of raising oil-immersed transformer coils with regard to such problem
The technique of intensity.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of technique for improving oil-immersed transformer coil mechanical strength.
One aspect of the present invention considers the ability of production equipment, on the one hand takes into account the complexity of worker operation again.This method be by
A kind of insulating varnish of transformer oil resistant, using vacuum pouring system, realize the paint leaching of coil, vacuum impregnation, vacuum solidification and
Vacuum drying, makes coil under the cementation of varnish, and it is higher to become an intensity, the bigger entirety of density, while it is clear to insulate
The software feature of paint can play certain buffer function again.
It is of the present invention the specific technical proposal is:
A kind of technique improving oil-immersed transformer coil mechanical strength, includes at least following steps:
S1, a kind of low-temperature setting insulating varnish for capableing of transformer oil resistant is selected；
S2, the coil that coiling is completed is put into vacuum tank, is dried in vacuo；
S3, after reaching the process time, the insulating varnish that will be mixed according to the ratio in advance, by certain flow rate pour leaching in coil table
The length of leaching time is poured in face according to the control of the size of coil；
S4, dry in vacuum tank, control time and vacuum degree, realization vacuum solidification.
Further, the vacuum drying condition in the step S2 specifically: vacuum degree is not higher than 200Pa, and drying temperature exists
It is 2~4h according to coil size baking time within the scope of 105 ± 5 DEG C.
Further, the specific mixed proportion of insulating varnish in the step S3 are as follows: varnish is divided into host agent and curing agent, host agent
It is mixed with curing agent according to the ratio of 7:1.
Further, the flow velocity in the step S3 are as follows: 700g/30min.
Further, the vacuum drying condition in the step S4 specifically: vacuum degree is not higher than 200Pa, and solidification temperature exists
Within the scope of 60 DEG C~80 DEG C, according to coil size, curing time is 4~6h.
Advantages of the present invention and good effect are as follows:
By using above-mentioned technical proposal, the present invention is had the following technical effect that:
One aspect of the present invention considers the ability of production equipment, on the one hand takes into account the complexity of worker operation again.It should
Method is that a kind of insulating varnish of transformer oil resistant using vacuum pouring system, is realized the paint leaching of coil, vacuum impregnation, true
Sky solidification and vacuum drying, make coil under the cementation of varnish, and it is higher to become an intensity, the bigger entirety of density, together
When insulating varnish software feature can play certain buffer function again.
Specific embodiment
In order to further understand the content, features and effects of the present invention, the following examples are hereby given, it is described in detail such as
Under.
A kind of technique improving oil-immersed transformer coil mechanical strength, comprising:
S1, a kind of low-temperature setting insulating varnish for capableing of transformer oil resistant is selected；
S2, the coil that coiling is completed is put into vacuum tank, is dried in vacuo；
S3, after reaching the process time, the insulating varnish that will be mixed according to the ratio in advance, by certain flow rate pour leaching in coil table
The length of leaching time is poured in face according to the control of the size of coil；
S4, dry in vacuum tank, control time and vacuum degree, realization vacuum solidification.
Further, the vacuum drying condition in the step S2 specifically: vacuum degree is not higher than 200Pa, and drying temperature exists
It is 2-4h according to coil size baking time within the scope of 105 ± 5 DEG C.
Further, the specific mixed proportion of insulating varnish in the step S3 are as follows: varnish is divided into first group (host agent) and second group
(curing agent) is mixed according to the ratio of 7:1.
Further, the flow velocity in the step S3 are as follows: 700g/30min.
Further, the vacuum drying condition in the step S4 specifically: vacuum degree is not higher than 200Pa, and solidification temperature exists
Within the scope of 60 DEG C~80 DEG C, according to coil size, curing time 4-6h.
One aspect of the present invention considers the ability of production equipment, on the one hand takes into account the complexity of worker operation again.It should
Method is that a kind of insulating varnish of transformer oil resistant using vacuum pouring system, is realized the paint leaching of coil, vacuum impregnation, true
Sky solidification and vacuum drying, make coil under the cementation of varnish, and it is higher to become an intensity, the bigger entirety of density, together
When insulating varnish software feature can play certain buffer function again.
The above is only the preferred embodiments of the present invention, and is not intended to limit the present invention in any form,
Any simple modification made to the above embodiment according to the technical essence of the invention, equivalent variations and modification, belong to
In the range of technical solution of the present invention.
Claims (5)
1. a kind of technique for improving oil-immersed transformer coil mechanical strength, it is characterised in that: include at least following steps:
S1, a kind of low-temperature setting insulating varnish for capableing of transformer oil resistant is selected；
S2, the coil that coiling is completed is put into vacuum tank, is dried in vacuo；
S3, after reaching the process time, the insulating varnish that will be mixed according to the ratio in advance pours leaching in coil surface by certain flow rate,
The length of leaching time is poured according to the control of the size of coil；
S4, dry in vacuum tank, control time and vacuum degree, realization vacuum solidification.
2. the technique according to claim 1 for improving oil-immersed transformer coil mechanical strength, which is characterized in that the step
Vacuum drying condition in rapid S2 specifically: vacuum degree is not higher than 200Pa, and drying temperature is within the scope of 105 ± 5 DEG C, according to line
Circle size baking time is 2~4h.
3. the technique according to claim 1 for improving oil-immersed transformer coil mechanical strength, which is characterized in that the step
The specific mixed proportion of insulating varnish in rapid S3 are as follows: varnish is divided into host agent and curing agent, host agent and curing agent according to 7:1 ratio
Mixing.
4. the technique according to claim 1 for improving oil-immersed transformer coil mechanical strength, which is characterized in that the step
Flow velocity in rapid S3 are as follows: 700g/30min.
5. the technique according to claim 1 for improving oil-immersed transformer coil mechanical strength, which is characterized in that the step
Vacuum drying condition in rapid S4 specifically: vacuum degree is not higher than 200Pa, solidification temperature within the scope of 60 DEG C~80 DEG C, according to
Coil size, curing time are 4~6h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811093771.4A CN109166722A (en) | 2018-09-19 | 2018-09-19 | A kind of technique improving oil-immersed transformer coil mechanical strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811093771.4A CN109166722A (en) | 2018-09-19 | 2018-09-19 | A kind of technique improving oil-immersed transformer coil mechanical strength |
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| Publication Number | Publication Date |
|---|---|
| CN109166722A true CN109166722A (en) | 2019-01-08 |
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ID=64879598
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811093771.4A Withdrawn CN109166722A (en) | 2018-09-19 | 2018-09-19 | A kind of technique improving oil-immersed transformer coil mechanical strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277236A (en) * | 2019-07-23 | 2019-09-24 | 湖北紫电电气设备有限公司 | A kind of oil immersion-type distribution transformer manufacturing method improving anti-short circuit capability |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179796A (en) * | 1978-03-13 | 1979-12-25 | Varo Semiconductor, Inc. | Method of making a transformer with an improved insulation system |
| CN101699586A (en) * | 2009-10-22 | 2010-04-28 | 四川泛华航空仪表电器厂 | Insulated impregnating process for high-frequency transformers |
| CN103390488A (en) * | 2013-08-02 | 2013-11-13 | 江苏亨特集团华特电气有限公司 | Vacuum drying method for power transformer body |
| CN108274670A (en) * | 2018-01-25 | 2018-07-13 | 大连北方互感器集团有限公司 | A kind of epoxide resin vacuum cast gel method |
-
2018
- 2018-09-19 CN CN201811093771.4A patent/CN109166722A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179796A (en) * | 1978-03-13 | 1979-12-25 | Varo Semiconductor, Inc. | Method of making a transformer with an improved insulation system |
| CN101699586A (en) * | 2009-10-22 | 2010-04-28 | 四川泛华航空仪表电器厂 | Insulated impregnating process for high-frequency transformers |
| CN103390488A (en) * | 2013-08-02 | 2013-11-13 | 江苏亨特集团华特电气有限公司 | Vacuum drying method for power transformer body |
| CN108274670A (en) * | 2018-01-25 | 2018-07-13 | 大连北方互感器集团有限公司 | A kind of epoxide resin vacuum cast gel method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277236A (en) * | 2019-07-23 | 2019-09-24 | 湖北紫电电气设备有限公司 | A kind of oil immersion-type distribution transformer manufacturing method improving anti-short circuit capability |
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Application publication date: 20190108 |