CN100578686C - Method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear - Google Patents
Method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear Download PDFInfo
- Publication number
- CN100578686C CN100578686C CN200480015156A CN200480015156A CN100578686C CN 100578686 C CN100578686 C CN 100578686C CN 200480015156 A CN200480015156 A CN 200480015156A CN 200480015156 A CN200480015156 A CN 200480015156A CN 100578686 C CN100578686 C CN 100578686C
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- China
- Prior art keywords
- hollow ball
- mould material
- switchgear
- solid sphere
- mould
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Powder Metallurgy (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The invention relates to a method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear and to the corresponding switchgear according to the preamble of patent claims 1, 2, 3 and 17. The aim of the invention is to remove the disadvantages mentioned in the description while providing an advantageous method. According to the invention, a mixture of spheres having a defined distribution of diameters of a size Dx are introduced into the casting compound and the components are cast directly.
Description
Technical field
The present invention relates to method and switchgear itself that a kind of manufacturing is used for low pressure, medium and high pressure technology switchgear insulating material moulded parts.
Background technology
For the member in above-mentioned switchgear the highest requirement has been proposed.Except the needs dielectric property, pay attention to mechanical performance simultaneously, as tendency of bending strength, impact strength and formation crackle etc.
The experience of this respect showed in the past, and the possibility of local (in Punkto) crackle of formation is arranged in the member made of insulating material in epoxy member with other in this type of switchgear.
In any case should avoid that this thing happens.Some effort have been made in the past for this reason.Build that vacuum chamber in the insulating material moulded parts and other parts are fixed with it and the joint that moves casts directly in the load shell of epoxy resin in.Form in order to tackle crackle here, material and the silica flour of interpolation or the inserts powder of quartz material powder composition of moulded parts are poured into a mould jointly.
This method has confirmed it is reliable.
In addition, be cast in member in the casting resin of silicone or polyurethane or a kind of being adjusted into " soft " and do not have the inserts powder in order to improve outer dielectric intensity.
Placing requires vacuum interrupter chamber or inserts reason that part comes from machinery must be by a kind of elastomeric material liner before in being poured into epoxy resin.Requirement to this material is:
The dielectric strength of-Gao
-with vacuum interrupter chamber (or inserting part) good adhesion
-with on every side epoxy resin good adhesion
-enough elasticity is to absorb heat and mechanical stress
The purpose that adds this liner is to be absorbed in the stress that member internal cause machinery or thermal contraction cause when making and use epoxy member.
Because the inserts powder nowadays commonly used or the proportion of inserts powder object height make member that bigger total weight be arranged.
When not having the inserts powder when the casting resin that uses silicone or polyurethane or a kind of being adjusted into " soft ", the mechanical strength of finishing the member of cast is low with elastomeric.
Summary of the invention
Set out thus, the objective of the invention is these class methods are done following improvement, promptly when keeping the described advantage of acquisition, overcome the shortcoming of touching upon.
The purpose that proposes is in by the method for this type as be issued to, the method that a kind of manufacturing is used for the moulded parts of low pressure, medium and high pressure technology switchgear is promptly proposed, wherein has spheroid that predetermined outside dimension Dx distributes and/or the mixture of hollow ball joins in the mould material with a kind of, then directly water and outpour member, and at least one switch gear room is shaped on one and encloses the body of casting by what a kind of first mould material was formed, then in joint is cast in a piece of being made up of at least a second mould material such as silicone or soft epoxy resin or plastics.
The purpose that relevant this type of switchgear aspect is proposed is as being issued to, a kind of the have low pressure of the moulded parts of cast, the switchgear of medium and high pressure technology are promptly proposed, it is characterized by: have the spheroid of predetermined diameter dimension Dx distribution and/or the mixture of hollow ball and/or particle and be added in first mould material, then directly pour into a mould out moulded parts, and the moulded parts of switchgear is made up of the material of electric insulation.
Here method aspect core of the present invention is, the spheroid mixture by statistical distribution that will have diameter dimension Dx adds in the mould material together as inserts.By in epoxy resin or in plastics, adding spheroid, glass marble or glass hollow ball as inserts, or by combination spheroid and inserts powder, the contraction that chemically causes in the time of can making sclerosis is adjusted into and is lower than the current value of record in the literature significantly, and this can also cause reducing the coefficient of expansion of finished product member.By add a kind of mixture on statistics aspect the particle external diameter by the present invention, can reach higher packing density.Therefore, the denser or distribution more thick and fast of particle or particle-matrix.Consequently form the direct cast thing of the stronger direct cast thing of a kind of mechanical tenacity or member and assembly.
Ball-type packing has also improved the notch toughness of the mould material after the sclerosis.
The mechanical shrinkage stress that stays inevitably in member can absorb by this way by the casting resin of filling, promptly, inserts is present in the epoxy resin spherically, the mechanical features value of corresponding mixture is improved once more apparent in viewly.
Another kind of can independently use or with the common method of using of said method be correspondingly to use hollow ball.Combine with the measure of at first mentioning, obtain a kind of mixture of solid and hollow ball here.By only using hollow ball or by uniting the use hollow ball, can make the less insulator of proportion, it can make from now on that whole member has little total weight.
By the present invention, at least one switch gear room is shaped on one and encloses the body of casting by what a kind of first mould material was formed, then in joint is cast in a piece of being made up of at least a second mould material such as silicone or soft epoxy resin or plastics.
Use epoxy resin as first mould material, and use silicone or polyurethane or urethane derivative or be adjusted into soft epoxy resin as second mould material.
In this case, can stipulate by another favourable design now, not only in first mould material but also in second mould material, add particle.
By favourable design, spheroid or hollow ball preferably are made up of aluminium nitride ceramics by glass or by pottery.Selected a kind of material that is suitable for use in the electric switching system thus.
In addition, favourable design is that packing density is adjusted between 50 and 90%.Obtaining optimal results aspect the measure of satisfying the machinery requirement and preventing to crack thus.
By another favourable design, some other inserts of fusion in spheroid and/or hollow ball mixture.
For wetting glass spheres or glass hollow ball better, can be applied in mold wash or the end agent that to have bought on the market at glass surface.By a kind of novel combination of different inserts powder in epoxy resin composition, should make in the future and insert part (for example vacuum interrupter chamber or other metals or the nonmetallic part of inserting) even without liner or there is this liner directly to enclose casting with this epoxy resin composition.
In order to obtain optimum, at first utilized bandwidth is from 65 microns to 120 microns the spheroid or the external diameter mixture of hollow ball.
Also can obtain optimum when in addition, adopting external diameter from 40 microns to 85 microns.
By another favourable design code, the mean specific gravity of particle is 0.2g/cm
3
By favourable design code, the mean specific gravity of a material is 0.37g/cm
3
Other improvement designs that can obtain favorable mechanical and electrical property are as follows:
-hollow ball has diameter to reach 200 microns,
-hollow ball effective percentage 0.1 to 0.6g/cm
3Between,
-solid sphere have proportion from 2.0 to 7.0g/cm
3Between.
The proportion of above-mentioned hollow ball is meant effective percentage, that is considers the weight of the per unit volume of cavity.
Feature by equipment of the present invention designs by corresponding mode.
Be the heat conduction that improves when generation is hot in switchgear on the other hand.This heat must from inside to outside derive, that is sheds.
Reason selects those materials with high unit thermal conductivity as inserts or additive thus.In a word, this material or the member made with this material are suitable for manyly than epoxy resin or another kind of plastics itself.Simultaneously, by having reduced the crackle susceptibility by pack grain of the present invention and having obtained the good insulation performance effect.
At first, irrelevant with additive, can provide one always to pour into a mould thing at silicone or an encapsulated type that is adjusted in the soft epoxy package, it is on the one hand around the switch gear room and on the other hand around joint.
Description of drawings
Expression and describe the present invention in detail below in accompanying drawing.Wherein:
Fig. 1 electrode part and vacuum interrupter chamber;
Fig. 2 presses the member of Fig. 1, by three-phase design;
Fig. 3 has the design of block pour mass in silicone for example.
Embodiment
Fig. 1 represents an electrode part of a switchgear for example.Here vacuum interrupter chamber 1 is enclosed casting by a kind of first mould material of being made up of epoxy resin 10.
As a kind of poured with epoxy resin material of mould material preferred selection as touching upon, in the clause of claim, be called first mould material.The spheroid or the particle that can in first mould material, add described size now by the present invention.And have by the present invention when reducing crackle and form dangerous effect, cause good heat conduction.In order to obtain the optimal heat conductance, particle or spheroid preferably are made up of aluminium nitride.Aluminium oxide also is suitable for, but the AIN thermal conductivity is greater than Al
2O
3Thermal conductivity.
Fig. 2 represents the structure of three-phase alternating current electric switching system.Here as last encapsulating material, that is as second mould material 20, use epoxy resin, silicone or polyurethane, insert wherein and sealed/pour into a mould together with joint/busbar 2 with the electrode part of first mould material cast by second mould material 20.Also can adopt drape process here.Use epoxy resin, silicone or polyurethane.Add inserts therein by the mode that has illustrated then.
In described material, add inserts, that is spheroid, hollow ball and other inserts.Distribution on the particle of selecting or the statistics of sphere size causes high packing density.
This means now and to reduce the internal stress of epoxy member and, to use the additive of the combination conduct of different spheroids, glass spheres or glass hollow ball when inserting part (for example vacuum interrupter chamber or other parts) in existence to epoxide resin material in order to absorb inevitable mechanical stress.Packing density has determined machinery and hot property.Packing density especially is 50-90%.By using the glass hollow ball, significantly reduce the proportion of epoxy resin composition.By to silicone or polyurethane or the casting resin that is adjusted into " soft " add spheroid, glass spheres or glass hollow ball, increase the mechanical strength of member and mould material.
In addition, the present invention's regulation is by the spheroid of corresponding other inserts compositions of mixing ratio fusion, for example silica flour, quartz material powder or wollastonite.
Also can use other thermosetting moulding materials (for example polyurethane) by the substituted epoxy resin.
Here the glass hollow ball can remain in the mould material with contacting with each other, so epoxy resin, silicone or polyurethane only fill up the wedge gap between the glass hollow ball.Thermal coefficient of expansion reduces towards the direction of the thermal coefficient of expansion of glass.
If select by silicone or polyurethane or be adjusted into the system that the casting resin of " soft " is formed, then can reach the mechanical strength of obvious increase member by interpolation spheroid, glass spheres or glass hollow ball.This has created possibility, and as structural material be provided for be cast with the insulator that mechanical stress arranged (member) that require fixing point with this material blends future.In addition, by adding the glass hollow ball, can make the member of the utmost point " gently " with high machinery and dielectric strength.
When making the solid insulation of collets (for example pouring into a mould all parts of switchgear), especially there is such problem, promptly the heat of Chan Shenging must outwards import surrounding environment by insulator, and the temperature of the member of being poured into a mould with assurance is no more than maximum permissible value.At present, be to make insulator that little but enough wall thickness or the radiator by settling metal (passing insulator a position until reaching the metal part or arriving near the metal part) are arranged for reaching measure that this purpose takes.
In the switchgear of solid insulation, except close element for example electrode part exceptionally have a series of jockeys and electric current contact, their itself equally must solid insulation and should be in the junction by the sealing of corresponding insulation element dielectric.
Otherwise, the parts of in the volume of optimizing, packing into and being necessary, for example vacuum interrupter chamber is as switch element, three-position switch (in case of necessity as another vacuum chamber), feed bar, transducer and other parts of activation.Then in mould, all equip and preferably pour into one " piece " or a unit with silicone rubber.For the piece that from then on forms hot-fluid is distinguished internally and can outwards be shed, can in silicone, add ceramic inserts.Inserts can add in the silicone material in advance.Another kind of possibility is for example to flood inserts with silicone in vacuum mold.
Be cast with by using silicone to have this possibility, promptly enclosing as mould material
OneThe whole technique equipment of insulator does not form crackle.
Connection on " piece " of possibility three-phase is preferably undertaken by cable, and cable is connected with the connector arrangement of commercially available plug size separately.Socket be cast in " piece " fixedly connectedly or " piece " on.In order to improve the mechanical strength in the switch element zone, the member of casting resin (electrode part is graded) can extend in the silicone material, shown in two schematic diagrames.On member, for example corresponding driving device can for example be installed from the outside.Remaining part (feed bar, transducer etc.) is installed between these parts.After applying corresponding adhesion medium, just can make electricity " sealing " piece with all parts that need.
At the inner hot-fluid that forms of piece especially inserts (to 220W/mk) guide pad surface by forming by materials A IN.If have high inserts ratio ground to add in the silicone material this ceramic material, then can significantly improve the thermal conductivity of mould material, and dielectric property remains on the present level or is improved.By correspondingly increase surface (adding the muscle that carries out convection current with surrounding air) or by suitable be cooling element on the non-key position to dielectric, hot-fluid outwards can be derived.
If inserts for example directly adds in the mould of parts, then can select the relatively particle diameter of " greatly " of ceramic part.That is to say that particle size is for example in the 1-10mm scope, and the notch toughness that the spherical piece made from raising is preferably arranged.This is with different with the situation of prefabricated mould material cast.Select more tiny particle in this case, so that reach enough low viscosity for the follow-up course of processing.
In order to simplify, can to make some monolithics and be in wherein total piece to replace all parts.By using monolithic, under the situation of repairing, can provide and be convenient to operation and scheme cheaply.
Fig. 3 represents that with transparent print the element of all explanations for example is installed in silicone or is adjusted in the piece pour mass of sealing of second mould material 20 of soft epoxy resin.Here, not only switch gear room 1 but also joint or busbar 2 all are cast in together with it.By the space layout of electrode part 1, in the block assembly of cast, cause the mechanical rigid of piece, though it is formed with the second soft mould material.
In the three-phase design as Fig. 2, piece is separated from each other by the plate 3 that is between them in order to dispel the heat.
Claims (24)
1. make the method for the moulded parts that is used for low pressure, medium and high pressure technology switchgear, wherein has solid sphere that predetermined outside dimension Dx distributes and/or the mixture of hollow ball joins in the mould material with a kind of, then directly water and outpour member, and at least one switch gear room is shaped on one and encloses the body of casting by what a kind of first mould material was formed, then in joint is cast in a piece of being made up of at least a second mould material.
2. in accordance with the method for claim 1, it is characterized by: use epoxy resin as first mould material, and use silicone or polyurethane or urethane derivative as second mould material.
3. it is characterized by in accordance with the method for claim 2: in first and/or second mould material, add particle.
4. according to claim 1,2 or 3 described methods, it is characterized by: solid sphere or hollow ball are made up of glass.
5. according to claim 1,2 or 3 described methods, it is characterized by: solid sphere or hollow ball are made up of pottery.
6. it is characterized by in accordance with the method for claim 5: solid sphere or hollow ball are made up of aluminium nitride ceramics.
7. according to the described method of one of claim 1 to 3, it is characterized by: packing density is adjusted between 50% and 90%.
8. according to the described method of one of claim 1 to 3, it is characterized by: in solid sphere and/or hollow ball mixture fusion some be short grained other inserts in form.
9. it is characterized by in accordance with the method for claim 8: other inserts are silica flour.
10. it is characterized by in accordance with the method for claim 3: the external diameter of solid sphere or hollow ball or particle has the bandwidth from 0.01mm to 10mm.
11. it is characterized by in accordance with the method for claim 3: solid sphere, hollow ball or particle have 0.2g/cm
3Mean specific gravity.
12. it is characterized by in accordance with the method for claim 3: solid sphere, hollow ball or particle have 0.37g/cm
3Mean specific gravity.
13. according to the described method of one of claim 1 to 3, it is characterized by: hollow ball has and reaches 200 microns diameter.
14. according to the described method of one of claim 1 to 3, it is characterized by: hollow ball has 0.1 to 0.6g/cm
3Between effective percentage.
15. according to the described method of one of claim 1 to 3, it is characterized by: solid sphere has from 2.0 to 7.0g/cm
3Proportion.
16. have the low pressure of the moulded parts of cast, the switchgear of medium and high pressure technology, it is characterized by: have the solid sphere of predetermined diameter dimension Dx distribution and/or the mixture of hollow ball and/or particle and be added in first mould material, then directly pour into a mould out moulded parts, and the moulded parts of switchgear is made up of the material of electric insulation.
17. according to the described switchgear of claim 16, it is characterized by: the moulded parts that encloses casting is inserted in second mould material or by second mould material and is poured into a mould once more, and described second mould material is made up of electrical insulating material.
18. according to the described switchgear of claim 17, it is characterized by: at least one switch gear room is shaped on one and encloses the body of casting by what a kind of first mould material was formed, then in joint is cast in a piece of being made up of at least a second mould material.
19., it is characterized by: use epoxy resin as first mould material, and use silicone or polyurethane or urethane derivative as second mould material according to claim 17 or 18 described switchgears.
20., it is characterized by: in first and/or second mould material, add described particle or spheroid according to the described switchgear of claim 19.
21. according to the described switchgear of claim 20, it is characterized by: solid sphere or hollow ball are made up of glass or pottery.
22. according to the described switchgear of claim 21, it is characterized by: solid sphere or hollow ball are made up of aluminium nitride ceramics.
23., it is characterized by: be used for the switchgear moulded parts of each phase of three-phase alternating current or the piece that member pours into a sealing respectively according to the described switchgear of one of all claims 16 to 18 in prostatitis.
24. according to the described switchgear of claim 23, it is characterized by: piece separately is shaped on the Connection Element (2) of some heat radiations.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10315927.4 | 2003-04-08 | ||
| DE10315927 | 2003-04-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1799110A CN1799110A (en) | 2006-07-05 |
| CN100578686C true CN100578686C (en) | 2010-01-06 |
Family
ID=33154114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200480015156A Expired - Fee Related CN100578686C (en) | 2003-04-08 | 2004-04-07 | Method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20070057399A1 (en) |
| EP (1) | EP1614124B1 (en) |
| CN (1) | CN100578686C (en) |
| AT (1) | ATE356413T1 (en) |
| DE (1) | DE502004003142D1 (en) |
| ES (1) | ES2284005T3 (en) |
| WO (1) | WO2004090913A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8652692B2 (en) * | 2005-11-23 | 2014-02-18 | Polyplus Battery Company | Li/Air non-aqueous batteries |
| DE102006021018B4 (en) | 2006-05-05 | 2014-08-14 | Wabco Gmbh | Inductive sensor |
| WO2008029329A2 (en) * | 2006-09-08 | 2008-03-13 | Philips Intellectual Property & Standards Gmbh | System and method for manufacturing molded structures using a high density matrix of microparticles |
| PL2414444T3 (en) | 2009-04-02 | 2013-09-30 | Huntsman Adv Mat Licensing Switzerland Gmbh | Direct overmolding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933712A (en) * | 1974-04-29 | 1976-01-20 | Burr-Brown Research Corporation | Novel encapsulating material and method |
| US4134848A (en) * | 1976-06-28 | 1979-01-16 | The United States Of America As Represented By The Secretary Of The Navy | Composite for improved stripline board material |
| US5608028A (en) * | 1994-02-02 | 1997-03-04 | Delco Electronics Corp. | Polybutadiene urethane potting material |
| CN1312333A (en) * | 2000-02-25 | 2001-09-12 | 阿尔卑斯电气株式会社 | Conductive resin composition and coded switch using said composition |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3812314A (en) * | 1971-08-23 | 1974-05-21 | Gen Electric | High power electrical bushing having a vacuum switch encapsulated therein |
| DE3527696A1 (en) * | 1985-08-02 | 1987-02-12 | Jones Parker & Co Ltd | High density foamable casting composition |
| DE3913488C2 (en) * | 1989-04-25 | 1994-02-03 | Bosch Gmbh Robert | Potting compound for electrical and electronic components |
| DE9321201U1 (en) * | 1993-10-28 | 1996-08-01 | Drägerwerk AG, 23558 Lübeck | Potting compound for an electrical assembly |
| EP1300439A1 (en) * | 2001-09-26 | 2003-04-09 | Abb Research Ltd. | Filler and its use in isolating assemblies |
-
2004
- 2004-04-07 DE DE502004003142T patent/DE502004003142D1/en not_active Expired - Lifetime
- 2004-04-07 AT AT04726149T patent/ATE356413T1/en not_active IP Right Cessation
- 2004-04-07 CN CN200480015156A patent/CN100578686C/en not_active Expired - Fee Related
- 2004-04-07 WO PCT/EP2004/003745 patent/WO2004090913A1/en active IP Right Grant
- 2004-04-07 EP EP04726149A patent/EP1614124B1/en not_active Expired - Lifetime
- 2004-04-07 ES ES04726149T patent/ES2284005T3/en not_active Expired - Lifetime
- 2004-04-07 US US10/552,651 patent/US20070057399A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933712A (en) * | 1974-04-29 | 1976-01-20 | Burr-Brown Research Corporation | Novel encapsulating material and method |
| US4134848A (en) * | 1976-06-28 | 1979-01-16 | The United States Of America As Represented By The Secretary Of The Navy | Composite for improved stripline board material |
| US5608028A (en) * | 1994-02-02 | 1997-03-04 | Delco Electronics Corp. | Polybutadiene urethane potting material |
| CN1312333A (en) * | 2000-02-25 | 2001-09-12 | 阿尔卑斯电气株式会社 | Conductive resin composition and coded switch using said composition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1799110A (en) | 2006-07-05 |
| DE502004003142D1 (en) | 2007-04-19 |
| EP1614124B1 (en) | 2007-03-07 |
| EP1614124A1 (en) | 2006-01-11 |
| ATE356413T1 (en) | 2007-03-15 |
| US20070057399A1 (en) | 2007-03-15 |
| WO2004090913A1 (en) | 2004-10-21 |
| ES2284005T3 (en) | 2007-11-01 |
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