CN102324364B - High-current sliding contact device in vacuum apparatus or sealing device - Google Patents
High-current sliding contact device in vacuum apparatus or sealing device Download PDFInfo
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- CN102324364B CN102324364B CN201110238973.5A CN201110238973A CN102324364B CN 102324364 B CN102324364 B CN 102324364B CN 201110238973 A CN201110238973 A CN 201110238973A CN 102324364 B CN102324364 B CN 102324364B
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- foldable component
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Abstract
The invention relates to a high-current sliding contact device in a vacuum apparatus or a sealing device. The problems that a conventional high-current heating device in the vacuum apparatus or the sealing device is difficult to release stress and has high requirements on assembly, thereby seriously influencing the service reliability and the service life of the vacuum apparatus or the sealing device are solved. According to the technical scheme, the high-current sliding contact device comprises a high-current heating device; two ends of the high-current heating device are connected with two ends of a power supply through leading wires; and one end of the high-current heating device is connected with one end of the power supply through a buffer bending subassembly and the sliding contact device as the leading wire at one end. The high-current sliding contact device has a simple structure; the thermal stress can be adequately released; the service reliability of the high-current heating device in the vacuum apparatus or the sealing device is improved; and the early failure caused by the reason can be stopped.
Description
Technical field
The present invention relates to vacuum electronic technical field, specifically the large electric current sliding contact device in a kind of vacuum device or sealing device.
Background technology
Two lead-in wires of large current heating device in existing vacuum device or vacuum sealing device all adopted and firmly connect (without any buffering) with being connected generally of power supply, this mode firmly connecing is owing to cannot being well suitable for STRESS VARIATION, very easily cause inefficacy or the damage of device, affect useful life, as the filament in vacuum klystron, its negative electrode common port is fixed on chassis (or stem stem), filament is drawn by the insulating porcelain piece on chassis, during design, all adopt rigid structure to connect, filament is meeting temperature distortion when energising work, the stress producing can reach lead-in wire, due to for being rigidly connected, under non-cushioned condition, the stress producing very easily causes open circuit or the short circuit of circuit, cause klystron early failure.Although designer has adopted the measure of some buffering stress (as the plastic deformation that utilizes supporting construction to carry out on filament lead wire, this form is not strictly elastic deformation in fact, or lead-in wire can not change and be free to slide with thermal stress, therefore its releasable stress of institute is less), but because filament is subject to thermogenetic stress larger, aforesaid way still can not make stress fully be discharged, and high to matching requirements, thereby has a strong impact on reliability and life-span that klystron uses.
Summary of the invention
The object of the invention is in order to solve the problems of the technologies described above, provide a kind of simple in structure, fully releasing heat stress, improve the large current heating device dependability in vacuum device or sealing device, the large electric current sliding contact device increasing the service life.
Technical scheme comprises large current heating device, and its two ends are connected with the two ends of power supply by lead-in wire, and one end of described large current heating device is connected with one end of power supply through the sliding contact device of buffering foldable component, conduct lead-in wire.
Described sliding contact device is bar cellular type sliding contact device, comprise the sliding contact bar that one end is connected with buffering foldable component, and as the sliding contact seat that goes between and be connected with one end of power supply, sliding contact with it in the endoporus of described sliding contact bar insertion sliding contact seat.
In described endoporus, be equipped with and can make the end of sliding contact bar and the locating part that inner hole wall remains contact condition.
The other end of described large current heating device is also connected with the other end of power supply through buffering foldable component, lead-in wire.
The described buffering foldable component being connected with large current heating device one end, comprises the horizontal buffering foldable component and the longitudinal buffer foldable component that connect successively, and described longitudinal buffer foldable component is connected with sliding contact device.
The buffering foldable component that the described and large current heating device other end is connected is for laterally cushioning foldable component.
Described buffering foldable component thickness is 0.2～0.4mm, and width is 5～10mm.
In antivacuum state, during logical super-high-current, contact point place can produce heat because of the existence of contact resistance, and contact point place temperature will raise.Rising along with temperature, the material at contact point place will be oxidized gradually, and after material oxidation, contact resistance will increase gradually, and the temperature at contact point place will raise again, will produce a kind of vicious circle like this, up to the maximum power that can bear over contact element, damage.Here it is, and overwhelming majority's plug-in type in antivacuum state electrically contacts the reason of product failure.Such as the insulating pot of using in daily life, electric cooker, air switch etc.While connecting sliding contact device solution stress problem for large current heating device, will inevitably make contact resistance increase, contact point place temperature raises.During long-term use, will form vicious circle, cause this failure of apparatus.Inventor to vacuum device and or the environmental condition of sealing device analyze, based on many experiments, find: under vacuum state, adopt supporting construction to discharge stress, not only assembling is complicated, technical difficulty is high and Stress Release is insufficient.And while adopting sliding contact device to connect large current heating device and power supply, under vacuum state, the contact resistance of sliding contact point do not estimate unexpectedly greatly, on the contrary in less scope.The general power consuming on contact resistance, be controlled at large current heating device gross power 2% in, so just do not need supporting construction to make the requirement of stress aspect, thereby greatly simplified the complexity of installation, stress also can fully be discharged.
Described sliding contact device can adopt various forms, as a contact, line contact, the various forms of sliding contact structures such as face contact, in order to guarantee the reliability of sliding contact, inventor has adopted a kind of bar cellular type sliding contact device especially, sliding contact bar inserts in the endoporus of sliding contact seat, high and contact resistance is little by a contact reliability, pass through again the further spacing of locating part, which kind of guaranteed no matter under state, sliding contact bar can be accepted the stress that all directions transmission comes, telescopic movable in the endoporus of sliding contact seat, can keep the electric contact state good with inner hole wall again always.The size gap of sliding contact bar and endoporus is suitable, can not be too large, can not be too little, and preferably at 0.8～1mm, excesssive gap can make the scope of activities of sliding contact bar in sliding contact hole shape element excessive, easily causes the disconnection in loop; The too small sliding contact bar limitation of activity in endoporus that can make in gap, makes sliding contact device lose effect.
According to the coefficient of expansion at the temperature on sliding contact bar and this temperature, can determine that sliding contact bar enters the degree of depth of the endoporus of sliding contact seat, its depth capacity should guarantee still can not touch the lowermost end of endoporus at maximum swelling coefficient lower slider contact lever, and minimum length should guarantee can from endoporus, not skid off when work.
And because stress may discharge to the different directions such as horizontal and vertical, inventor analyzes and researches for this dispose procedure and direction, by one or more buffering foldable components of arranging by the stress transmission of different directions and release to sliding contact device.
Beneficial effect:
1. the in the situation that apparatus of the present invention meeting between components and parts excellent electric contact under vacuum state, fully alleviated large current heating device is out of shape, produces stress and the short circuit, the fracture that occur in process of expansion and contraction, the problem that causes vacuum device or sealing device to lose efficacy, guaranteed that equipment is used safe and reliable, can effectively stop the early failure that large current heating device causes owing to expanding with heat and contract with cold, the reliability of device improves.
2. the release due to stress is completed by apparatus of the present invention, therefore for supporting construction, requires to reduce, and makes the installation of vacuum device or sealing device and maintenance more simple and reliable, has reduced production cost, has shortened the production cycle.
3. be applicable to various vacuum device or the sealing devices that have large current heating device, as klystron, magnetron etc.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is that A in Fig. 1 is to view.
Fig. 3 is that B in Fig. 1 is to view.
Fig. 4 is that C in Fig. 1 is to view.
Wherein, the large current heating device of 1-, 2-laterally cushion foldable component, 3-longitudinal buffer foldable component, 4-sliding contact bar, 5-stop screw, 6-sliding contact seat, 6.1-endoporus, 7-and laterally cushion foldable component, 8-lead-in wire, 9-power supply.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further explained to explanation:
With reference to Fig. 1, one end of large current heating device 1 is through laterally buffering foldable component 2, longitudinal buffer foldable component 3, bar cellular type sliding contact device are connected with one end of power supply 9.The other end of large current heating device 1 is through laterally buffering foldable component 7, lead-in wire 8 are connected with the other end of power supply 9.Described bar cellular type sliding contact device is comprised of sliding contact bar 4 and sliding contact seat 6, described sliding contact bar 4 one end are connected with longitudinal buffer foldable component 3, the other end inserts in the endoporus 6.1 of sliding contact seat 6, and described sliding contact seat 6 is connected with one end of power supply 9 as another lead-in wire simultaneously.On described sliding contact seat 6, be also provided with end nipple for the stop screw 5 of endoporus 6.1 walls.
Wherein, preferably the size gap between diameter of bore φ B and sliding contact bar φ A is φ B-φ A=0.8～1mm, sliding contact bar 4 inserts the depth dimensions L2 of endoporus 6.1, should guarantee that when maximum swelling sliding contact bar 4 does not push up the lowermost end of endoporus 6.1, and (during no power) can not skid off again from endoporus 6.1 in when work (during energising) or while not working, preferably L2(is without under swelling state, the end of sliding contact bar 4 is apart from the length in endoporus 6.1 apertures) length dimension be 5～6 times of diameter of bore φ A, the end of sliding contact bar 4 apart from the degree of depth L3(of endoporus 6.1 bottom surfaces without under swelling state, the end of sliding contact bar 4 is apart from the length of endoporus 6.1 bottom surfaces) length dimension be endoporus 6.1 diameter phi A 1-1.5 doubly.The size of stop screw 5 can determine according to the size of sliding contact bar 4, its size preferably sliding contact bar 4 diameters 0.8-1.2 doubly.Such as we select the diameter of sliding contact bar, be φ A=φ 3.2mm, the stop screw of selection is MA=M3.Stop screw 5 diameters are too little will lose spacing effect, and sliding contact bar 4 can horizontally slip in endoporus 6.1.The end of described stop screw 5 also should keep certain gap with sliding contact bar 4, guarantee when large current heating device 1 no power, sliding contact bar 4 contacts with endoporus 6.1 walls and makes large current heating device 1 and power supply 9 form loop, when large current heating device 1 logical super-high-current, sliding contact bar 4 is under the effect of stop screw 5, can remain and the contact condition of endoporus 6.1 hole walls, can slide along the hole wall of endoporus 6.1 again, this gap be preferably controlled at 0.25～0.5 tooth apart between.And according to stop screw 5 sizes, can further determine the position dimension L1 of stop screw on endoporus 6.1, preferably L1(stop screw 5 axial lines are apart from the length of bore orifice) be 1.5～1.7mm.
Operation principle: large current heating device 1 (during no power) each parts when not working are in turn connected to form electric loop.During large current heating device 1 work (during energising), laterally cushion foldable component 7 release portion lateral stresses, laterally buffering foldable component 2 and longitudinal buffer foldable component 3 also transmit respectively horizontal and vertical stress to sliding contact bar 4, sliding contact bar 4 is slided along endoporus 6.1 hole walls of sliding contact seat 6, thereby this stress is discharged by sliding action, and guarantee the unimpeded of electric loop.
With reference to Fig. 2,3,4, described buffering foldable component refers to the vertical or horizontal bending of electric conducting material (as tantalum, tantalum-niobium alloy, nickel etc.) is formed to the components and parts with at least one bending part, when stress conducts to now, transmission and the part that due to the existence of bending part, can realize stress discharge.Because large current heating device working temperature is high, for example in example the working temperature of large current heating device 1400 ℃ of left and right.Therefore, the gentle corresponding temperature of foldable component 7 of rushing of buffering foldable component 2 is also higher.It should select exotic material, as tantalum, tantalum-niobium alloy, also can select nickel material.So buffering foldable component material can not be too thick, to reduce thermal resistance, avoids large current heating device thermal loss.But it needs again to have some strength, thereby buffering foldable component material thickness is between 0.2～0.4mm.Its material width maximum power big or small according to large current heating device and that allow is determined, generally within the scope of 5～10mm, selects.
Claims (4)
1. the large electric current sliding contact device in a vacuum device or sealing device, comprise the large current heating device that is positioned at vacuum device or sealing device, its two ends are connected with the two ends of power supply by lead-in wire, it is characterized in that, one end of described large current heating device is through the buffering foldable component for releasing heat stress, sliding contact device as lead-in wire is connected with one end of power supply, described sliding contact device is bar cellular type sliding contact device, comprise the sliding contact bar that one end is connected with buffering foldable component for releasing heat stress, and as the sliding contact seat that goes between and be connected with one end of power supply, sliding contact with it in the endoporus of described sliding contact bar insertion sliding contact seat, in described endoporus, be equipped with and can make the end of sliding contact bar and the locating part that inner hole wall remains contact condition, the described buffering foldable component for releasing heat stress comprises horizontal buffering foldable component and the longitudinal buffer foldable component connecting successively, described longitudinal buffer foldable component is connected with sliding contact device.
2. the large electric current sliding contact device in vacuum device as claimed in claim 1 or sealing device, is characterized in that, the other end of described large current heating device is also connected with the other end of power supply through buffering foldable component, lead-in wire for releasing heat stress.
3. the large electric current sliding contact device in vacuum device as claimed in claim 2 or sealing device, is characterized in that, the buffering foldable component for releasing heat stress being connected with the large current heating device other end is for laterally cushioning foldable component.
4. the large electric current sliding contact device in the vacuum device as described in any one in claim 1 or 2 or sealing device, is characterized in that, the described buffering foldable component thickness for releasing heat stress is 0.2～0.4mm, and width is 5～10mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110238973.5A CN102324364B (en) | 2011-08-19 | 2011-08-19 | High-current sliding contact device in vacuum apparatus or sealing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110238973.5A CN102324364B (en) | 2011-08-19 | 2011-08-19 | High-current sliding contact device in vacuum apparatus or sealing device |
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| CN102324364A CN102324364A (en) | 2012-01-18 |
| CN102324364B true CN102324364B (en) | 2014-04-30 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441490A (en) * | 2002-02-28 | 2003-09-10 | 三洋电机株式会社 | Semiconductor device and its producing method |
| CN101114736A (en) * | 2006-07-28 | 2008-01-30 | 星电株式会社 | Connecting device |
| CN101950869A (en) * | 2010-08-31 | 2011-01-19 | 上海航天科工电器研究院有限公司 | Heavy-current power connector |
| CN202183354U (en) * | 2011-08-19 | 2012-04-04 | 湖北汉光科技股份有限公司 | Heavy current sliding contact apparatus inside vacuum /sealing device |
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2011
- 2011-08-19 CN CN201110238973.5A patent/CN102324364B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441490A (en) * | 2002-02-28 | 2003-09-10 | 三洋电机株式会社 | Semiconductor device and its producing method |
| CN101114736A (en) * | 2006-07-28 | 2008-01-30 | 星电株式会社 | Connecting device |
| CN101950869A (en) * | 2010-08-31 | 2011-01-19 | 上海航天科工电器研究院有限公司 | Heavy-current power connector |
| CN202183354U (en) * | 2011-08-19 | 2012-04-04 | 湖北汉光科技股份有限公司 | Heavy current sliding contact apparatus inside vacuum /sealing device |
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