CN101404360B - Connector post of refrigeration compressor - Google Patents
Connector post of refrigeration compressor Download PDFInfo
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- CN101404360B CN101404360B CN2008102169057A CN200810216905A CN101404360B CN 101404360 B CN101404360 B CN 101404360B CN 2008102169057 A CN2008102169057 A CN 2008102169057A CN 200810216905 A CN200810216905 A CN 200810216905A CN 101404360 B CN101404360 B CN 101404360B
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Abstract
The invention relates to a terminal part of a compressor, in particular to a binding post of a cold compressor of highly reliable ceramic insulation medium connection. The binding post comprises an end cover which is welded with a shell of the compressor, and a conductive pillar that is sealed and connected with the end cover by glass; wherein, the glass is used for playing the role of insulation and sealing, the conductive pillar is provided with an insulator separating the surface of the glass from the air, and the insulator is made of the following materials: 92-96% of aluminium oxide, 2-3% of silicon oxide, 1-3% of calcium oxide, 0.5-1.0% of bismuth oxide and 0.5-1.0% of antimony oxide. The binding post has the advantages that specially prepared aluminum oxide ceramics is adopted to replace steatite ceramics (or forsterite) to be taken as the insulator, so that the creep age distance is prolonged, and the phenomenon of overflash is avoided in the low vacuum environment, thereby effectively avoiding the serious result of compressor explosion. At the same time, the expansion of microcrack is prevented, and the probability of air leakage is effectively reduced, so that good connecting effect is formed.
Description
Technical field
The present invention relates to a kind of compressor end subassembly, refer more particularly to the connector post of refrigeration compressor that a kind of highly reliable ceramic insulation medium connects.
Background technology
Glass metal sintering binding post is the vitals of refrigerant compressor, by it external power is sent to compressor inside, supplies with the usefulness of motor and other part time jobs.And air-tightness, insulation resistance, proof voltage intensity is the important performance indexes of binding post.Traditional compressor wiring rod structure as depicted in figs. 1 and 2, end cap 10 welds together by electric resistance welding and compressor case, conductive pole 20 is sealed by specific glass 30 and end cap 10, glass 30 play the insulation and the sealing effect.
There is company to adopt steatite ceramic (or forsterite) at present abroad as insulator, because steatite ceramic (or forsterite) cost is lower, and easily and glass complete wetting and obtain good bond effect, but because steatite ceramic (or forsterite) sintering is relatively more difficult, become the porcelain temperature range narrower, and chemical stability is relatively poor, is easy to aging and causes electrical property sharply to descend.
A lot of report explanations has been arranged because binding post insulation and the bad serious consequence that causes of proof voltage, traditional binding post is because the inner entrained air of compressor, too short or glass properties descends and produces the low vacuum arcing because of creepage distance to cause inboard conductive pole, causes the serious accident of compressor blast to take place.Adopt steatite ceramic (or forsterite) to increase creepage distance as insulator, effect is obvious, but still there are many similar accidents to take place, in the sector failure analysis experience for many years, find that arcing causes owing to talcum (or forsterite) The Ageing of Insulators causes serious decline of voltage-resistent characteristic through the inventor.
The weak point of existing connector post of refrigeration compressor has:
(1) existing refrigerant compressor is easy to take place following accident: the short circuit that refrigerant compressor terminal internal wiring terminal high-voltage breakdown (High Voltage Breakdown) causes and cause that compressor burns; Perhaps, cause the appearance of compressor security incident because low vacuum arcing (Low Vacuum Spark) causes the cold-producing medium blast.
(2) existing binding post glass surface crackle expansion causes air-tightness to reduce and electrical property (comprising proof voltage, insulating properties) reduction;
(3) adopt other kind ceramic insulator stable chemical performance relatively poor.
Based on the weak point of existing connector post of refrigeration compressor, the inventor has designed a kind of " connector post of refrigeration compressor ".
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art technical problem to be solved is: the connector post of refrigeration compressor that provides a kind of highly reliable ceramic insulation medium to connect.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of connector post of refrigeration compressor, it comprises an end cap, this end cap and compressor case weld together, and conductive pole is sealed by glass and end cap, and glass is used to play the effect of insulation and sealing, described conductive pole is provided with the insulator that glass surface and air are separated, this insulator is made by following material: aluminium oxide: 92-96%, silica: 2-3%, calcium oxide: 1-3%, bismuth oxide: 0.5-1.0%, antimony oxide: 0.5-1.0%.The coefficient of expansion of insulator: @RT-500 ℃ of 8.0 ± 0.5X10^-6/K ().
Described insulator preparation technology flow process is: preparing burden earlier, then various materials are carried out batch mixing, carry out granulating working procedure again, carry out dry-pressing formed and firing process then, is to test at last.
Described end cap upside is provided with the silicon rubber that glass surface and air are separated.
Described binding post preparation technology flow process is: carry out the parts preliminary treatment earlier; Each parts is assembled; Carry out sintering again; Electroplate then and welding sequence; Test at last.
Described firing process comprises following 6 sintering stages:
1) surface heat is handled, and is used for oxidizing atmosphere; 2) parts preheating is used for oxidizing atmosphere; 3) parts pre-oxidation is used for controlled atmosphere; 4) in the high temperature welding stage, be used for controlled atmosphere; 5) reduction phase is used for reducing atmosphere; 6) annealing cooling stage, reducing atmosphere.
The defective that is difficult to avoid at existing talcum (or forsterite) insulator existence, the present invention adopts the aluminium oxide ceramics of particular arrangement to replace employing steatite ceramic (or forsterite) as insulator, in aluminium oxide, add special composition, to adjust its coefficient of expansion and to strengthen it and the high-temperature moisture ability of glass, do not influence simultaneously its dielectric strength again, the present invention is intended to adjust simultaneously the performance of glass and pottery, make its coupling, and form good connection, obtain the higher dielectric strength of reliability with this.
The present invention is the connector post of refrigeration compressor that a kind of highly reliable ceramic insulation medium connects, and its beneficial effect is:
(1) it adopts the aluminium oxide ceramics of formulated to replace employing steatite ceramic (or forsterite) as insulator, because the aluminium oxide ceramics ratio is easier to sintering, become porcelain temperature broad, and chemical property is extremely stable, can be not in time, the variation of environment such as temperature, humidity and wearing out, can keep lasting physics and chemical characteristic.
(2) increase creepage distance, even a spot of air is sneaked in compressor inside, because chemical stability that this alumina insulation is fabulous and very high proof voltage intensity also are enough to stop the generation of arcing phenomena under the low vacuum environment, thereby avoided the serious consequence of compressor blast effectively.
(3) simultaneously, because glass surface is separated by pottery, stoped the expansion of micro-crack effectively, thereby reduce the probability of gas leakage effectively, and in aluminium oxide, added other materials in the present invention, to adjust its coefficient of expansion and to strengthen it and the high-temperature moisture ability of glass, form good connection effect.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is traditional compressor wiring post overall structure generalized section;
Fig. 2 is traditional compressor wiring post overall structure vertical view;
Fig. 3 is an overall structure schematic diagram of the present invention;
Fig. 4 is an overall structure vertical view of the present invention.
Description of reference numerals
10, end cap 20, conductive pole 30, glass
40, insulator 50, silicon rubber
Embodiment
With reference to Fig. 3 and Fig. 4, the present invention implements like this:
In Fig. 3 and Fig. 4, it comprises an end cap (10), this end cap (10) and compressor case weld together, conductive pole (20) is sealed by glass (30) and end cap (10), glass (30) is used to play the effect of insulation and sealing, conductive pole (20) is provided with insulator (40) glass (30) is surperficial and that air separates, end cap (10) upside is provided with silicon rubber (50) glass (30) is surperficial and that air separates, insulator (40) is made by aluminium oxide, this insulator (40) is made by following material: aluminium oxide: 92-96%, silica: 2-3%, calcium oxide: 1-3%, bismuth oxide: 0.5-1.0%, antimony oxide: 0.5-1.0%.The coefficient of expansion of insulator (40): @RT-500 ℃ of 8.0 ± 0.5X10^-6/K ().
The key factor of implementing the invention has 2 points:
(1) prescription of aluminium oxide ceramics must make it have suitable thermal coefficient of expansion, has good withstand voltage properties simultaneously, and easy and glass generation high-temperature moisture.Below be the performance design and the actual test result of the alumina insulation medium of formulated:
| Performance index | Design data | Real data | Method of testing/instrument | Test condition |
| Proof voltage intensity V/mm | 4200V/mm | 4500V/mm | Japan KIKUSUI measuring cell | 25 ℃, RH:50%, 5 seconds |
| Insulation resistance: M Ω | 35000 | 40000 | Japan HIOKI insulation measurement instrument | 25℃，RH：50％，@500VDC |
| T glass high- |
30° | 27° | The profile survey method | 980 °, 25 minutes |
| The coefficient of |
8.5 | 8.4 | Switzerland Mettler TMA analyzer | FromRT?to?500℃ |
(2) suitable sintering temperature system, owing to relate to the connection of different materials, and the coefficient of expansion is all variant, therefore, adopting suitable sintering process could guarantee to have between the various materials comparatively reliably connects, and have less stress to exist, do not come off to guarantee insulator to stand extreme temperature shock.This sintering process relates to 6 sintering stages, corresponding different respectively temperature, speed and atmosphere:
Phase I: surface heat is handled, and is used for oxidizing atmosphere;
Second stage: the parts preheating is used for oxidizing atmosphere;
Phase III: parts pre-oxidation is used for controlled atmosphere;
Quadravalence section: in the high temperature welding stage, be used for controlled atmosphere;
Five-stage: reduction phase is used for reducing atmosphere;
The 6th stage: annealing cooling stage, reducing atmosphere.
Following table is through the bonding strength between the various materials of test:
| Performance index | Gross data | Real data | Method of testing/instrument | Test condition |
| Adhesion: glass and conductive pole: KN (is qualified greater than 35) | 75 | 48 | U.S. Dillon thrust meter | 25 ℃, RH:50%, loading velocity: 10,000 Ns/minute |
| Adhesion: glass and ceramic insulator N are qualified greater than 20N | 35 | 30 | Britain TORQUE torsiometer | Loading velocity 5N/ second |
(3) typical process flow:
1, insulator preparation: batching
Batch mixing
Granulation
Dry-pressing formed
Burn till
Test
2, binding post preparation: parts preliminary treatment
Parts (comprising end cap, glass, conductive pole, ceramic insulator) assembling
Sintering
Electroplate
Welding
Test
(4) following product reliability test and accelerated aging test comparison table:
The above, it only is a kind of preferred embodiment of connector post of refrigeration compressor that the highly reliable ceramic insulation medium of the present invention connects, be not that technical scope of the present invention is imposed any restrictions, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention above any trickle modification, equivalent variations and modification that embodiment did.
Claims (5)
1. connector post of refrigeration compressor, it comprises an end cap (10), this end cap (10) and compressor case weld together, conductive pole (20) is sealed by glass (30) and end cap (10), glass (30) is used to play the effect of insulation and sealing, it is characterized in that: described conductive pole (20) is provided with insulator (40) glass (30) is surperficial and that air separates, described insulator (40) is made by following material: aluminium oxide: 92-96%, silica: 2-3%, calcium oxide: 1-3%, bismuth oxide: 0.5-1.0%, antimony oxide: 0.5-1.0%.
2. a kind of connector post of refrigeration compressor according to claim 1 is characterized in that described end cap (10) upside is provided with silicon rubber (50) glass (30) is surperficial and that air separates.
3. a kind of connector post of refrigeration compressor according to claim 1, it is characterized in that described insulator (40) preparation technology's flow process is: prepare burden earlier, then various materials are carried out batch mixing, carry out granulating working procedure again, carrying out dry-pressing formed and firing process then, is to test at last.
4. a kind of connector post of refrigeration compressor according to claim 1 is characterized in that described binding post preparation technology flow process is: carry out the parts preliminary treatment earlier; End cap (10), conductive pole (20), glass (30), insulator (40) are assembled; Carry out sintering circuit again; Electroplate then and welding sequence; Test at last.
5. a kind of connector post of refrigeration compressor according to claim 3 is characterized in that described firing process comprises following 6 sintering stages:
1) surface heat is handled, and is used for oxidizing atmosphere; 2) parts preheating is used for oxidizing atmosphere; 3) parts pre-oxidation is used for controlled atmosphere; 4) in the high temperature welding stage, be used for controlled atmosphere; 5) reduction phase is used for reducing atmosphere; 6) annealing cooling stage, reducing atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102169057A CN101404360B (en) | 2008-10-21 | 2008-10-21 | Connector post of refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102169057A CN101404360B (en) | 2008-10-21 | 2008-10-21 | Connector post of refrigeration compressor |
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| Publication Number | Publication Date |
|---|---|
| CN101404360A CN101404360A (en) | 2009-04-08 |
| CN101404360B true CN101404360B (en) | 2011-05-11 |
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|---|---|---|---|
| CN2008102169057A Active CN101404360B (en) | 2008-10-21 | 2008-10-21 | Connector post of refrigeration compressor |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634285A (en) * | 2009-06-19 | 2010-01-27 | 潮州市三江电子有限公司 | Wiring terminal for carbon dioxide refrigeration compressor |
| CN101707310B (en) * | 2009-09-30 | 2012-01-04 | 中航光电科技股份有限公司 | Sealed switching connector |
| CN101838135A (en) * | 2010-05-20 | 2010-09-22 | 株洲湘火炬汽车密封有限责任公司 | Porcelain bushing of pressure-bearing insulator and production process thereof |
| CN102881386B (en) * | 2012-09-20 | 2015-04-29 | 匡成效 | Glass insulator |
| CN103441343A (en) * | 2013-07-30 | 2013-12-11 | 张家港市格致电器制造有限公司 | Wiring board used for semi-sealing compressor |
| CN105198388B (en) * | 2015-09-24 | 2018-04-24 | 颜荣土 | A kind of preparation method of high voltage suspended electric power ceramic wiring terminal |
| CN105254289B (en) * | 2015-09-24 | 2018-07-27 | 湖南鸿迪机电科技有限公司 | A kind of preparation method of electric power inorganic compound ceramic binding post |
| CN105254288B (en) * | 2015-09-28 | 2018-04-24 | 刘淑敏 | A kind of preparation method of electric power organic composite ceramic wiring terminal |
| CN105130406B (en) * | 2015-09-28 | 2018-04-24 | 颜荣雄 | A kind of preparation method of high voltage suspended electric power alumina-based ceramic binding post |
| CN109537013B (en) * | 2018-12-03 | 2020-12-04 | 上海雷迪埃电子有限公司 | Insulator electroplating method |
| CN110932053B (en) * | 2019-11-25 | 2021-03-16 | 东营市汇安科工贸有限责任公司 | Preparation method of binding post material for control cabinet wiring terminal |
| CN114069362A (en) * | 2020-08-02 | 2022-02-18 | 宜昌华宝科技有限公司 | Production process of silicone oil for greatly enhancing insulation performance of automobile connector terminal |
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Owner name: CHAOZHOU THREE-CIRCLE (GROUP) CO., LTD. Free format text: FORMER NAME: CHAOZHOU SANJIANG ELECTRONICS CO., LTD. |
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Address after: 521000 comprehensive building of three ring industrial city, Feng Tang, Guangdong, Chaozhou Patentee after: Chaozhou Three-Circle (Group) Co., Ltd. Address before: 521000, Guangdong City, Chaozhou Province Feng Tang Sanhuan Industrial City Complex Building Patentee before: Chaozhou Sanjiang Electronics Co., Ltd. |