CN101677044B - High voltage DC vacuum relay with high reliability and long service life - Google Patents
High voltage DC vacuum relay with high reliability and long service life Download PDFInfo
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- CN101677044B CN101677044B CN2008100718257A CN200810071825A CN101677044B CN 101677044 B CN101677044 B CN 101677044B CN 2008100718257 A CN2008100718257 A CN 2008100718257A CN 200810071825 A CN200810071825 A CN 200810071825A CN 101677044 B CN101677044 B CN 101677044B
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Abstract
The invention discloses a high voltage DC vacuum relay with high reliability and long service life, which is arranged inside a vacuum cavity body that is sealed and connected by meal and ceramic; a ceramic insulator is connected between a movable contact component and a push rod in a sliding way; the good vacuum performance and electric insulation performance of the ceramic insulator can be utilized to lead the movable contact and a fixed contact to main good electric insulation together with a magnetic circuit system formed by a magnetic guide yoke iron plate of the relay, an iron core and the like no matter in a state of connection or disconnection, so that current interruption capability of the relay can be guaranteed when DC high-voltage load is switched; a vacuum chamber body and all parts in side the vacuum chamber body formed by the high voltage DC vacuum relay have low enough saturated vapor pressure and are treated by high temperature baking exhaust, so that the vacuum degree in the vacuum chamber body can ensure the work demand of the relay on switching heavy current and the DC high-voltage load for a long time; furthermore, the relay also has the advantages of simple and compact structure, small volume, light weight, strong shock resistance and impact resistance, simple technique process, low production cost and large batch production.
Description
Technical field
The present invention relates to a kind of relay, particularly relate to a kind of novel high voltage DC vacuum relay with high reliability and long service life.
Background technology
Development along with modern industrial technology, all progressively carried out automation in various fields, for guaranteeing Electrical Safety and guaranteeing power output, more and more higher to relay switched voltage and switch current requirement, as: occasions such as motor vehicle, motor vehicle driven by mixed power, fuel-cell vehicle, construction machine, power management, charging-electric discharge device, variable frequency control, solar power system control, welding equipment, elevator.And traditional relay is subjected to self manufacturing technology, the particularly little restriction of contact gap, when connecting high-voltage alternating, high voltage direct current, big direct current machine, low-power factor inductive load, relay contact is very easy to occur adhesive failure or continuous electric arcing fire contact system lost efficacy.
At present; some solutions have been arranged; such relay places ceramic cavity with contact assembly; the moving contact assembly is connected with the promotion structure by plastic part; promote the contact by iron core and realize conversion; because plastics---organic high molecular compound steam pressure in the operating temperature range of vacuum system is very high; vacuum degree to vacuum system has huge adverse effect; therefore; for protect the contact when the switch load not because of producing moment high temperature fusion and burning; such relay generally need carry out exhaust earlier to vacuum cavity, removes some oxidizing gas as far as possible, and then charges into some H
2, N
2Or SF
6Deng protective gas, strengthen the ability of solution of contiguity broken height voltage, big electric current.Simultaneously, such relay continues to worsen electrical contact performance because the gas that charges into can cause contact voltage drop to raise, and the contact temperature rise aggravates, and plastic part can discharge organic gas under temperature and arcing, reduces the performance and the dependability of relay.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of high voltage DC vacuum relay with high reliability and long service life is provided, its contact portion is sealed in the ceramic cavity fully, can realize the relay of vacuum, overcome typical high voltage direct current gas-filled relay because the deficiency of the current interruption abilities that organic high molecular compound brought such as gas that the moving contact part directly is electrically connected, charges into iron core and plastics.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high voltage DC vacuum relay with high reliability and long service life comprises moving contact assembly, fixed contact assembly, contains cored pushing mechanism, ceramic cavity, external magnetic circuit part; The fixed contact that the fixed contact assembly comprises exit and fixes with exit, this exit is installed on the ceramic cavity; The moving contact that the moving contact assembly comprises movable contact spring and fixes with movable contact spring; The iron core that pushing mechanism comprises catch bar and under the external magnetic circuit partial action catch bar moved; External magnetic circuit partly is installed in outside the ceramic cavity; Moving contact assembly, fixed contact, pushing mechanism are sealed in the vacuum chamber that is made of ceramic cavity fully and are divided the position that is in mutual corresponding matching, the moving contact assembly is connected with first end of catch bar, iron core is connected with second end of catch bar, slidely connects in the joint of moving contact assembly and catch bar to be used for realizing the ceramic insulator that moving contact assembly and catch bar, iron core good electrical insulate.
Described ceramic insulator is divided into first ceramic insulator and second ceramic insulator, and first, second ceramic insulator slides over the first end of described catch bar respectively; The first relative ceramic insulator, the outer end of second ceramic insulator are resisted against the position limiting structure of described catch bar first end respectively, and elasticity compresses a stage clip that is used for producing overtravel and contact force between the inner of first, second ceramic insulator; What movable contact spring was contained in stage clip and first ceramic insulator the inner compresses place and isolated fully by first, second ceramic insulator and described catch bar, iron core mutually.
The inner of described first ceramic insulator, second ceramic insulator also be respectively equipped with can mutual nestable slip protuberance, first ceramic insulator, second ceramic insulator mutually nestable protuberance make catch bar and movable contact spring isolated fully.
The spring body of described stage clip for adopting refractory metal material to be made for moving contact produces pressure with contacting of fixed contact, makes moving contact closely contact with fixed contact.
The termination of first end of described catch bar is provided with draw-in groove, be provided with the step of reducing in the end, back-up ring is equipped with at the draw-in groove place, this back-up ring and step be configured to respectively to provide the outer end of first ceramic insulator, second ceramic insulator carry out against position limiting structure, the described stage clip elasticity between first ceramic insulator and second ceramic insulator is opened and first ceramic insulator, second ceramic insulator is supported to back-up ring, step respectively.
Described iron core is divided into static iron core and moving iron core, the termination and the moving iron core of second end of described catch bar fix, be nested with the static iron core activity in the end of second end of catch bar, static iron core and ceramic cavity fix, and are provided with back-moving spring between static iron core and the moving iron core.
The termination of second end of described catch bar is provided with and can be used for realizing the helicitic texture that contact overtravel adjusting and contact force are regulated, and fixes with laser welding or electron beam welding mode after screw connection structure is regulated with adjusting of realization contact overtravel and contact force by regulating between moving iron core and the catch bar again.
Described ceramic cavity comprises ceramic shield, the frame sheet, conductive magnetic yoke iron plate, metal-back, the bottom that conductive magnetic yoke iron plate is sealedly connected on ceramic shield by the frame sheet surrounds and can hold the moving contact assembly, fixed contact, vacuum first chamber of the parts such as ceramic insulator of catch bar first end and catch bar first end, metal-back is connected the bottom of conductive magnetic yoke iron plate and surrounds vacuum second chamber of the parts such as iron core that can hold catch bar second end and catch bar second end, conductive magnetic yoke iron plate is provided with the through hole that is used to be communicated with vacuum first chamber and vacuum second chamber, and described static iron core is fixed in the described through hole.
Described composition vacuum cavity and inner parts thereof must be through the preliminary treatment of electrovacuum technology requirement before assembling, make the parts of forming vacuum cavity and inside thereof all have good electrovacuum performance, can guarantee the vacuum degree of need of work in the vacuum cavity.
Described fixed contact and exit adopt soldering to fix, and exit is fixed on the ceramic shield by the annealing in hydrogen atmosphere soldering.
Described ceramic shield and frame sheet fix by the annealing in hydrogen atmosphere soldering; Conductive magnetic yoke iron plate adopts laser welding or vacuum electron beam welding mode to form airtight vacuum cavity with metal-back and frame sheet respectively.
A kind of high voltage DC vacuum relay with high reliability and long service life of the present invention has constituted the internal magnetic circuit part by conductive magnetic yoke iron plate, static iron core, moving iron core, and the external magnetic circuit part then comprises U-shaped yoke, coil.This vacuum relay also comprises casing cover, shell, packing ring, iron clip, magnet steel, transition pad, regulates parts such as pad, blast pipe, bedplate.
A kind of high voltage DC vacuum relay with high reliability and long service life of the present invention, be in vacuum cavity by metal and crunch seal, utilize good vacuum performance of ceramic insulator part and electrical insulation capability, making moving contact and fixed contact is that the magnetic circuit system that all constitutes with parts such as the conductive magnetic yoke iron plate of relay, iron cores under any state of conducting or disconnection keeps good electric insulation, thereby has guaranteed the current interruption ability of relay when switching the dc high voltage load.
During assembling, two moving contacts and movable contact spring soldering form the contact form of " 1FormA ", catch bar is cross-under transition pad, adjusting pad, second ceramic insulator, stage clip, the movable contact spring that has welded moving contact, first ceramic insulator, transition pad successively, after the elastic force of regulating stage clip reaches requirement, again with split washer with above-mentioned part and catch bar riveted and fixed; The ceramic insulator part has the best electrical insulation capability, makes moving contact and catch bar keep good electric insulation; Stage clip adopts resistant to elevated temperatures metal material, produces overtravel during for the moving contact adhesive enough contact forces are provided, and moving contact is contacted with fixed contact reliably; All parts that moving contact assembly, pushing mechanism comprise all have good electrovacuum performance, can guarantee the vacuum degree of need of work in the vacuum cavity.
Static iron core and soldering have the conductive magnetic yoke iron plate of blast pipe to rivet, after the catch bar that the moving contact assembly is housed passed from its centre bore, load onto the back-moving spring that adopts resistant to elevated temperatures metal material to make, again moving iron core is threaded with catch bar, at this moment, the distance of regulating between active iron core and the static iron core promptly regulates contact gap and overtravel, and back-moving spring also has a pre compressed magnitude simultaneously, will move iron core and catch bar at last and fix with laser welding or electron beam welding.
Fixed contact and exit tight fit are pressed into the back soldering and form the fixed contact assembly, carry out the annealing in hydrogen atmosphere soldering with ceramic cavity again; The conductive magnetic yoke iron plate that moving contact assembly and static iron core are housed is carried out laser welding or the airtight vacuum cavity of vacuum electron beam welding formation with metal-back and frame sheet respectively; Form vacuum cavity and inner parts necessary preliminary treatment that requires through the electrovacuum technology before assembling thereof.
Vacuum cavity is contained in carries out the high-temperature baking exhaust on the exhaust station with apparatus for baking, to reach the vacuum degree of reliable need of work.
Coil is passed metal-back place between conductive magnetic yoke iron plate and the U-shaped yoke, again conductive magnetic yoke iron plate and U-shaped yoke riveted and fixed are formed the magnetic circuit system that seals; When coil adds excitation during signal, moving iron core will be subjected to electromagnetic force and moving contact and fixed contact adhesive.
After the outside of the ceramic shield of vacuum cavity is assembled four blocks of magnet steel and two iron clips respectively, again it is all packed in the shell and encapsulating is fixed, in the peripheral magnetic field that forms of ceramic cavity, further improve the current interruption ability of relay, promptly form voltage DC vacuum relay with high after adding other essential accessory.Will produce high-voltage arc when relay switches big electric current, high-tension load between the contact, the magnetic field that magnet steel and two iron clips produce will draw away the high-voltage arc between the contact, makes it reduce infringement to the contact.
The invention has the beneficial effects as follows, because the moving contact assembly is good ceramic electrical insulation connection with being connected of catch bar, iron core, thereby guaranteed relay when switching big electric current, dc high voltage load, the coil that the energized relay circuit system is worked under low-voltage state can not be subjected to big electric current, high-tension influence and cause damage; Because helicitic texture has been adopted in being connected between the termination of second end of catch bar and the moving iron core, can be conveniently used for realizing the adjusting and the contact force adjusting of contact overtravel; All have enough low saturated vapor pressure owing to constitute all parts of vacuum cavity and inside thereof, and, make the vacuum degree in the vacuum cavity can guarantee for a long time that relay switches the need of work of big electric current, dc high voltage load through the high-temperature baking exhaust; This relay also has following advantage: simple in structure, compact, volume is little, in light weight, and anti-vibration and impact property are strong, and technical process is simple, and the part ratio is easier to processing, and production cost is low, and flowing water is manufactured in enormous quantities.
Below in conjunction with drawings and Examples the present invention is described in further detail; But a kind of high voltage DC vacuum relay with high reliability and long service life of the present invention is not limited to embodiment.
Description of drawings
Fig. 1 is a D structure schematic diagram of the present invention;
Fig. 2 is a front view of the present invention;
Fig. 3 is a vertical view of the present invention;
Fig. 4 is a structure decomposing schematic representation of the present invention;
Fig. 5 is the figure that cuts open along A among Fig. 3-A line;
Fig. 6 is the figure that cuts open along B among Fig. 3-B line;
Fig. 7 is the structure decomposing schematic representation of moving contact assembly of the present invention, pushing mechanism;
Fig. 8 is another embodiment organigram of the present invention.
Number in the figure explanation: casing cover 1, shell 2, packing ring 3, iron clip 4, magnet steel 5, exit 6, fixed contact 7, ceramic shield 8, frame sheet 9, split washer 10, transition pad 11, first ceramic insulator 12, the protuberance 121 of first ceramic insulator, moving contact 13, movable contact spring 14, stage clip 15, second ceramic insulator 16, the protuberance 161 of second ceramic insulator, regulate pad 17, catch bar 18, the draw-in groove 181 of catch bar 18, the step 182 of catch bar 18, conductive magnetic yoke iron plate 19, static iron core 20, blast pipe 21, back-moving spring 22, moving iron core 23, metal-back 24, coil 25, U-shaped yoke 26, bedplate 27.
Embodiment
To shown in Figure 7, a kind of high voltage DC vacuum relay with high reliability and long service life of the present invention comprises moving contact assembly, fixed contact assembly, contains cored pushing mechanism, ceramic cavity, external magnetic circuit part referring to Fig. 1; The fixed contact 7 that the fixed contact assembly comprises exit 6 and fixes with exit, this exit 6 is installed on the ceramic cavity; The moving contact 13 that the moving contact assembly comprises movable contact spring 14 and fixes with movable contact spring; The iron core that pushing mechanism comprises catch bar 18 and under the external magnetic circuit partial action catch bar moved; External magnetic circuit partly is installed in outside the ceramic cavity; Moving contact assembly, fixed contact, pushing mechanism are sealed in the vacuum chamber that is made of ceramic cavity fully and are divided the position that is in mutual corresponding matching, the moving contact assembly is connected with first end of catch bar 18, iron core is connected with second end of catch bar 18, slidely connects in the joint of moving contact assembly and catch bar 18 to be used for realizing the ceramic insulator that moving contact assembly and catch bar 18, iron core good electrical insulate.
Ceramic insulator is divided into the first end that first ceramic insulator 12 and second ceramic insulator, 16, the first ceramic insulators 12, second ceramic insulator 16 slide over described catch bar 18 respectively; The first relative ceramic insulator 12, the outer end of second ceramic insulator 16 are resisted against the position limiting structure of described catch bar 18 first ends respectively, and elasticity compresses a stage clip 15 that is used for producing overtravel and contact force between the inner of first ceramic insulator 12, second ceramic insulator 16; What movable contact spring 14 was contained in stage clip 15 and first ceramic insulator, 12 the inners compresses place and isolated fully by first ceramic insulator 12, second ceramic insulator 16 and described catch bar 18, iron core mutually.
The inner of first ceramic insulator 12, second ceramic insulator 16 also be respectively equipped with can mutual nestable slip protuberance 121, protuberance 161, in the protuberance 121 of first ceramic insulator 12 and the protuberance 161 of second ceramic insulator 16 are coated on catch bar 18 in mutual sliding process all the time, thereby can make catch bar 18 and movable contact spring 14 isolated fully.
The spring body of stage clip 15 for adopting refractory metal material to be made for moving contact 13 produces pressure with contacting of fixed contact 7, makes moving contact 13 closely contact with fixed contact 7.
The termination of first end of catch bar 18 is provided with draw-in groove 181, be provided with the step 182 of reducing in the end, split washer 10 is equipped with at draw-in groove 181 places, this back-up ring 10 and step 182 be configured to respectively to provide the outer end of first ceramic insulator 12, second ceramic insulator 16 carry out against position limiting structure, described stage clip 15 elasticity between first ceramic insulator 12 and second ceramic insulator 16 are opened and first ceramic insulator 12, second ceramic insulator 16 are supported to back-up ring 10, step 182 respectively.
Iron core is divided into static iron core 20 and moving iron core 23, the termination and the moving iron core 23 of second end of described catch bar 18 fix, be nested with static iron core 20 activities in the end of second end of catch bar, static iron core 20 fixes with ceramic cavity, is provided with back-moving spring 22 between static iron core 20 and the moving iron core 23.
The termination of second end of catch bar 18 is provided with and can be used for realizing the helicitic texture that contact overtravel adjusting and contact force are regulated, and fixes with laser welding or electron beam welding mode after screw connection structure is regulated with adjusting of realization contact overtravel and contact force by regulating between moving iron core 23 and the catch bar 18 again.
Ceramic cavity comprises ceramic shield 8, frame sheet 9, conductive magnetic yoke iron plate 19, metal-back 24, the bottom that conductive magnetic yoke iron plate 19 is sealedly connected on ceramic shield 8 by frame sheet 9 surrounds and can hold the moving contact assembly, fixed contact, vacuum first chamber of the parts such as ceramic insulator of catch bar first end and catch bar first end, metal-back 24 is connected the bottom of conductive magnetic yoke iron plate 19 and surrounds vacuum second chamber of the parts such as iron core that can hold catch bar second end and catch bar second end, conductive magnetic yoke iron plate 19 is provided with the through hole that is used to be communicated with vacuum first chamber and vacuum second chamber, and described static iron core 20 is fixed in the described through hole.
Form vacuum cavity and inner parts necessary preliminary treatment that requires through the electrovacuum technology before assembling thereof, make the parts of forming vacuum cavity and inside thereof all have good electrovacuum performance, can guarantee the vacuum degree of need of work in the vacuum cavity.
Fixed contact 7 adopts soldering to fix with exit 6, and exit 6 is fixed on the ceramic shield 8 by the annealing in hydrogen atmosphere soldering.
A kind of high voltage DC vacuum relay with high reliability and long service life of the present invention has constituted the internal magnetic circuit part by conductive magnetic yoke iron plate 19, static iron core 20, moving iron core 23, and the external magnetic circuit part then comprises U-shaped yoke 26, coil 25.This vacuum relay also comprises casing cover 1, shell 2, packing ring 3, iron clip 4, magnet steel 5, transition pad 11, regulates parts such as pad 17, blast pipe 21, bedplate 27.
A kind of high voltage DC vacuum relay with high reliability and long service life of the present invention, be in vacuum cavity by metal and crunch seal, utilize good vacuum performance of ceramic insulator part and electrical insulation capability, making moving contact 13 and fixed contact 7 is that the magnetic circuit system that all constitutes with parts such as the conductive magnetic yoke iron plate 19 of relay, iron cores under any state of conducting or disconnection keeps good electric insulation, thereby has guaranteed the current interruption ability of relay when switching the dc high voltage load.
During assembling, two moving contacts 13 and movable contact spring 14 solderings form the contact form of " 1Form A ", catch bar 18 successively cross-under transition pad 11, regulate pad 17, second ceramic insulator 16, stage clip 15, welded movable contact spring 14, first ceramic insulator 12, the transition pad 11 of moving contact 13, after the elastic force of adjusting stage clip 15 reaches requirement, use split washer 10 again with above-mentioned part and catch bar 18 riveted and fixed; The ceramic insulator part has the best electrical insulation capability, makes moving contact 13 and catch bar 18 keep good electric insulation; Stage clip 15 adopts resistant to elevated temperatures metal material, produces overtravel during for moving contact 13 adhesives enough contact forces are provided, and moving contact 13 is contacted with fixed contact 7 reliably; All parts that moving contact assembly, pushing mechanism comprise all have good electrovacuum performance, can guarantee the vacuum degree of need of work in the vacuum cavity.
Fixed contact 7 is pressed into the back soldering with exit 6 tight fits and forms the fixed contact assembly, carries out the annealing in hydrogen atmosphere soldering with ceramic cavity again; The conductive magnetic yoke iron plate 19 that moving contact assembly and static iron core are housed is carried out laser welding or the airtight vacuum cavity of vacuum electron beam welding formation with metal-back 24 and frame sheet 9 respectively; Form vacuum cavity and inner parts necessary preliminary treatment that requires through the electrovacuum technology before assembling thereof.
Vacuum cavity is contained in carries out the high-temperature baking exhaust on the exhaust station with apparatus for baking, to reach the vacuum degree of reliable need of work.
After the outside of the ceramic shield 8 of vacuum cavity is assembled four blocks of magnet steel 5 and two iron clips 4 respectively, again it is all packed in the shell 2 and encapsulating is fixed, in the peripheral magnetic field that forms of ceramic cavity, further improve the current interruption ability of relay, promptly form voltage DC vacuum relay with high after adding other essential accessory.Will produce high-voltage arc when relay switches big electric current, high-tension load between the contact, the magnetic field that magnet steel 5 and two iron clips 4 produce will draw away the high-voltage arc between the contact, makes it reduce infringement to the contact.
Fig. 8 is another embodiment organigram of the present invention, be with the difference of previous embodiment, the protuberance 121 of first ceramic insulator 12 and the protuberance of second ceramic insulator 16 161 not mutual nestable being in the same place, at this moment, the effect of the protuberance 121 of first ceramic insulator 12 mainly is that to be used for the effect of the protuberance 161 of socket movable contact spring 14 and stage clip 15, the second ceramic insulators 16 be to be used for socket stage clip 15; Because the protuberance 121 of first ceramic insulator 12 and the protuberance of second ceramic insulator 16 161 are not nestable mutually, therefore, catch bar 18 is isolated with movable contact spring 14, does not isolate fully with stage clip 15.
The foregoing description only is used for further specifying a kind of high voltage DC vacuum relay with high reliability and long service life of the present invention; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection range of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (11)
1. high voltage DC vacuum relay with high reliability and long service life comprises moving contact assembly, fixed contact assembly, contains cored pushing mechanism, ceramic cavity, external magnetic circuit part; The fixed contact that the fixed contact assembly comprises exit and fixes with exit, this exit is installed on the ceramic cavity; The moving contact that the moving contact assembly comprises movable contact spring and fixes with movable contact spring; The iron core that pushing mechanism comprises catch bar and under the external magnetic circuit partial action catch bar moved; External magnetic circuit partly is installed in outside the ceramic cavity; It is characterized in that: moving contact assembly, fixed contact, pushing mechanism are sealed in the vacuum chamber that is made of ceramic cavity fully and are divided the position that is in mutual corresponding matching, the moving contact assembly is connected with first end of catch bar, iron core is connected with second end of catch bar, slidely connects in the joint of moving contact assembly and catch bar to be used for realizing the ceramic insulator that moving contact assembly and catch bar, iron core good electrical insulate.
2. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 1, it is characterized in that: described ceramic insulator is divided into first ceramic insulator and second ceramic insulator, and first, second ceramic insulator slides over the first end of described catch bar respectively; The first relative ceramic insulator, the outer end of second ceramic insulator are resisted against the position limiting structure of described catch bar first end respectively, and elasticity compresses a stage clip that is used for producing overtravel and contact force between the inner of first, second ceramic insulator; What movable contact spring was contained in stage clip and first ceramic insulator the inner compresses place and isolated fully by first, second ceramic insulator and described catch bar, iron core mutually.
3. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 2, it is characterized in that: the inner of described first ceramic insulator, second ceramic insulator also be respectively equipped with can mutual nestable slip protuberance, first ceramic insulator, second ceramic insulator mutually nestable protuberance make catch bar and movable contact spring isolated fully.
4. according to claim 2 or 3 described a kind of high voltage DC vacuum relay with high reliability and long service life, it is characterized in that: the spring body of described stage clip for adopting refractory metal material to be made, for moving contact produces pressure with contacting of fixed contact, moving contact is closely contacted with fixed contact.
5. according to claim 2 or 3 described a kind of high voltage DC vacuum relay with high reliability and long service life, it is characterized in that: the termination of first end of described catch bar is provided with draw-in groove, be provided with the step of reducing in the end, back-up ring is equipped with at the draw-in groove place, this back-up ring and step be configured to respectively to provide the outer end of first ceramic insulator, second ceramic insulator carry out against position limiting structure, the described stage clip elasticity between first ceramic insulator and second ceramic insulator is opened and first ceramic insulator, second ceramic insulator is supported to back-up ring, step respectively.
6. according to claim 2 or 3 described a kind of high voltage DC vacuum relay with high reliability and long service life, it is characterized in that: described iron core is divided into static iron core and moving iron core, the termination and the moving iron core of second end of described catch bar fix, be nested with the static iron core activity in the end of second end of catch bar, static iron core and ceramic cavity fix, and are provided with back-moving spring between static iron core and the moving iron core.
7. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 6, it is characterized in that: the termination of second end of described catch bar is provided with and can be used for realizing the helicitic texture that contact overtravel adjusting and contact force are regulated, and fixes with laser welding or electron beam welding mode after screw connection structure is regulated with adjusting of realization contact overtravel and contact force by regulating between moving iron core and the catch bar again.
8. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 6, it is characterized in that: described ceramic cavity comprises ceramic shield, the frame sheet, conductive magnetic yoke iron plate, metal-back, the bottom that conductive magnetic yoke iron plate is sealedly connected on ceramic shield by the frame sheet surrounds and can hold the moving contact assembly, fixed contact, vacuum first chamber of the ceramic insulator of catch bar first end and catch bar first end, metal-back is connected the bottom of conductive magnetic yoke iron plate and surrounds vacuum second chamber of the iron core that can hold catch bar second end and catch bar second end, conductive magnetic yoke iron plate is provided with the through hole that is used to be communicated with vacuum first chamber and vacuum second chamber, and described static iron core is fixed in the described through hole.
9. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 8, it is characterized in that: described ceramic shield, the frame sheet, conductive magnetic yoke iron plate, metal-back, the moving contact assembly, fixed contact, the ceramic insulator of catch bar first end and catch bar first end, the iron core of catch bar second end and catch bar second end must be through the preliminary treatment of electrovacuum technology requirement before assembling, make ceramic shield, the frame sheet, conductive magnetic yoke iron plate, metal-back, the moving contact assembly, fixed contact, the ceramic insulator of catch bar first end and catch bar first end, the iron core of catch bar second end and catch bar second end all has good electrovacuum performance, can guarantee the vacuum degree of need of work in the vacuum cavity.
10. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 8 is characterized in that: described fixed contact and exit adopt soldering to fix, and exit is fixed on the ceramic shield by the annealing in hydrogen atmosphere soldering.
11. a kind of high voltage DC vacuum relay with high reliability and long service life according to claim 8 is characterized in that: described ceramic shield and frame sheet fix by the annealing in hydrogen atmosphere soldering; Conductive magnetic yoke iron plate adopts laser welding or vacuum electron beam welding mode to form airtight vacuum cavity with metal-back and frame sheet respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100718257A CN101677044B (en) | 2008-09-19 | 2008-09-19 | High voltage DC vacuum relay with high reliability and long service life |
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|---|---|---|---|
| CN2008100718257A CN101677044B (en) | 2008-09-19 | 2008-09-19 | High voltage DC vacuum relay with high reliability and long service life |
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| CN101677044A CN101677044A (en) | 2010-03-24 |
| CN101677044B true CN101677044B (en) | 2011-12-28 |
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| CN107578954A (en) * | 2017-10-12 | 2018-01-12 | 江苏路通电器有限公司 | A kind of high-voltage DC contactor of liquid medium |
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| BR112020023521A2 (en) * | 2018-09-20 | 2021-06-01 | Ubukata Industries Co., Ltd. | dc breaker |
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| CN115458367B (en) * | 2022-11-09 | 2023-04-11 | 浙江英洛华新能源科技有限公司 | Contact portion sealing structure of relay |
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2008
- 2008-09-19 CN CN2008100718257A patent/CN101677044B/en active Active
Also Published As
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|---|---|
| CN101677044A (en) | 2010-03-24 |
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