A kind of HTS-SMES magnet deviceTechnical field
The invention belongs to the fields such as HTS applications technology and New Magnetic Field Controlled energy storage technology, and in particular to a kind of high-temperature superconductorEnergy storage magnet apparatus is used in high-temperature superconducting energy storage system as energy-storage travelling wave tube, especially suitable for based on the conduction type of coolingHigh-temperature superconducting energy storage system is applied to electric system.
Background technique
Progress and the research boom of superconductor applications technology that grows up therefrom with hts tape technology,Superconducting magnetic energy storage system (SMES) electric device technology is quickly grown, and is just gradually transferred to practical engineering application rank by experimental stageSection.Superconducting energy storage technology is to be stored energy in the form of electromagnetic energy using high temperature superconductor coil, when needed again will be electricMagnetic energy is released to electric device.Due to the zero resistance nature of superconductor, coil current carrying density can reach very high, and then can be withThe volume and weight of energy-storage system is reduced, has high-energy density, high power density, quick response and long service life etc. specialPoint.These advantages make SMES improve power system dynamic step response, the emergency power supply as important equipment or UPS electricitySource, and there is apparent superiority on the multiple fields such as new concept high energy weapon Pulse Power Techniques and purposes.
Superconducting magnetic energy storage is the component of entire superconductive energy storage system core the most, carries as energy storage unitsThe quick storage and release function of electromagnetic energy.In practical applications, superconducting magnetic energy storage generally requires work to superconductive energy storage systemIn the ultra-low temperature surroundings and strong magnetic field circumstance of 30K or so, it will be made to bear being total to for biggish cold events stress and forceful electric power magnetic forceSame-action, and then the biggish strain of generation inside superconducting magnet is caused on the one hand to make superconduction when strain reaches a certain levelThe critical current density of magnet coil is degenerated, and on the other hand will lead to the composite rupture inside magnet, and then influence superconductionThe stability of magnet structure.According to Japanese superconduction and cryogenic engineering association to the he result of investigation of world's superconducting magnet system,Superconducting magnet operating current is difficult to reach most of reason of its design requirement from mechanical damage.Therefore, in high-temperature superconductorIn the design process of energy storage magnet apparatus, the Strain Distribution feature according to suffered by magnet structure, take corresponding strengthening measure withEnsure that superconducting magnet has enough mechanical strengths.
In addition, the conduction cooling of magnet must be by metalwork in the HTS-SMES magnet system of the conduction type of coolingIt completes.However, HTS-SMES magnet can generate alternating current in actual operation, and then alternating magnetic field is generated, so that superBiggish eddy-current loss is generated in hardware inside magnetizer.On the one hand the heat that this eddy-current loss generates can causeThe temperature of superconducting magnet coil increases, and making its actual temperature is more than the operating temperature of design, will lead to magnet coil current-carrying capabilityIt reduces, while may result in superconducting magnet coil and locally quenching, magnet coil is even damaged under serious conditions；On the other hand,The cooling load of refrigeration system can be caused to increase, if cannot take away in time the heat that eddy-current loss generates, will affect entire storageThe thermal stability of energy system, will finally arrive causes system can not work normally.
Therefore, it under the premise of guaranteeing that superconducting magnetic energy storage has enough conduction cooling effects, should reduce to the greatest extent inside magnetHardware and the eddy-current loss for reducing hardware, this is the key link of superconducting magnetic energy storage structure design, andTechnological difficulties.
Summary of the invention
It is an object of the present invention to be directed to large capacity high-temperature superconducting energy storage systematic difference scene, it is super to provide a kind of high temperatureEnergy storage magnet apparatus is led, is used in high-temperature superconducting energy storage system as energy-storage travelling wave tube, to solve existing HTS-SMES magnetUltralow temperature and high-intensity magnetic field bring problems of mechanical strength and magnet inner metal generate larger under alternating magnetic field in deviceThe problems such as eddy-current loss bring superconducting magnet locally quenches risk and influences system thermal stability.
The technical solution adopted by the present invention to solve the technical problems is: a kind of HTS-SMES magnet device, includingSupport inner ring and the high temperature superconductor coil being wound in support inner ring, the high temperature superconductor coil outside are cased with support circleRing is filled with multilayer transition superconductive tape, is cased with support on the outside of the support annulus between high temperature superconductor coil and support annulusOuter ring supports and is filled with multilayer transition stainless steel band, the front and rear sides of the high temperature superconductor coil between annulus and support outer ringIt is provided with thermally conductive side plate, thermally conductive side plate is attached fixation, thermally conductive side plate with support inner ring and support outer ring respectively using boltEnd be connected with transition cold bridge, excessive cold bridge is process using oxygenless copper material, thermally conductive for cold source cooling capacity to be transmitted toOn side plate, it is fixed with sealing side plate outside thermally conductive side plate, the sealing side plate is externally provided with the multiple pull rods being uniformly distributed circumferentially,The both ends of pull rod are connect with support inner ring and support outer ring respectively, and the current feed that the high temperature superconductor coil is drawn is pierced by supportIt is fixed on after annulus on the epoxidized block of support outer ring, all components recycle Low-temperature epoxy glue to carry out normal-temperature vacuum after being completedDipping casting, all components are solidified.
A kind of HTS-SMES magnet device, high temperature superconductor coil pass through high-temperature superconductor band coilingAt using section for round or D-shaped double cake structures, the ipsilateral extraction of the current feed at coil both ends carries out linking fixation.
A kind of HTS-SMES magnet device, support inner ring pass through galss fiber reinforced resin base composite woodMaterial weaves, using staged circular ring structure, inside support and thermally conductive side plate and pull rod for high temperature superconductor coilEnd is fixed.
A kind of HTS-SMES magnet device, multilayer transition superconductive tape use n(n=3~6) root superconductive tapeBe spliced, for alleviate and reduce high temperature superconductor coil from support annulus caused due to different shrinking percentages in a low temperature of both receiveThe gap of contracting interface, every superconductive tape remain open, and n root superconductive tape constitutes the n concentric circles with fracture, and fracture is using poly-Acid imide adhesive tape is wrapped up, and two neighboring round fracture present position keeps interval 360/n degree in circumferencial direction.
A kind of HTS-SMES magnet device, support annulus use galss fiber reinforced resin base composite woodMaterial weaves, and internal diameter is consistent with multilayer transition superconductive tape outer diameter, thickness and high temperature superconductor coil it is consistent, annular width is30~40mm；Outlet direction on support annulus respectively along high temperature superconductor coil both ends current feed opens up wide 1mm depth 6mm'sLine outlet groove, the outlet for current feed.
A kind of HTS-SMES magnet device, multilayer transition stainless steel band use n(n=3~6) root thicknessStainless steel band less than 0.3mm is spliced, for alleviating and reducing support annulus from support outer ring since different shrinking percentages are ledThe gap of interface is shunk both in a low temperature of cause, every stainless steel band remains open, and fracture and stainless steel band ontology are all made ofKapton Tape is wrapped up, and the fracture present position of adjacent two circle keeps interval 360/n degree in circumferencial direction.
A kind of HTS-SMES magnet device, support outer ring and pull rod be all made of stainless steel material processing andAt；It supports outer ring and uses the outer square structure of inner circle, internal diameter is consistent with the support outer diameter of annulus, and thickness and support annulus thicknessUnanimously, the maximum width from inner circle to outside is no more than 20mm；Pull rod is circumferentially radially distributed, and is distributed in the left and right sidesPull rod quantity Relative distribution it is more in upper and lower sides quantity, for further increasing the overall mechanical strength of device, while notBring more eddy-current loss, for pull rod with a thickness of 5~10mm, width is 15~25mm, and length dimension is according to the diameter of superconducting coilIt is determined to length.
A kind of HTS-SMES magnet device, thermally conductive side plate is using oxygenless copper material according to special construction shapeFormula is process, and using the outer square structure of inner circle, for the conduction cooling of superconducting coil, with a thickness of 3mm~6mm, plate face opens up oneThe straight trough of serial 1mm~3mm wide, radical length need to ensure notch beyond radial zone where superconducting coil, and notch is circumferentiallyIt is radially distributed, the maximum distance between slot is 15~20mm, and the width in unslotted region is near ambient external and inner circle15~20mm.Meanwhile the notch of central region is all cut off towards center of circle direction in the horizontal direction, so that the unslotted near inner circleRegion disjunction, loses continuity.
A kind of HTS-SMES magnet device, sealing side plate are processed using epoxy phenolic laminated glass fabric plateIt forms, and using the outer square structure of inner circle, is used for integrally-built encapsulation, interior circular diameter is consistent with the support internal diameter of inner ring, outsideSide size is consistent with the support side dimension of outer ring, with a thickness of 3~5mm.
A kind of HTS-SMES magnet device, current feed spliced using oxygen-free copper stripe and superconductive tape andAt wherein the width and thickness of oxygen-free copper stripe is consistent with the width and thickness of superconductive tape respectively, passes through welding manner between the twoIt is attached.
The invention is characterized in that above technical scheme, has the advantage that
1, it using the support inner ring of galss fiber reinforced resin based composites, both can be significantly reduced when magnet apparatus worksEddy-current loss, while effective guarantee can be provided to prevent superconducting coil from mechanical damage occur；
2, it can be effectively relieved between different materials component using multilayer transition superconductive tape and multilayer stainless steel band due to different receiptsShrinkage shrinks the gap of interface in a low temperature of causing；
3, the support annulus made of the braiding of galss fiber reinforced resin based composites covers on the outside of high temperature superconductor coil, andOpen up the wide 1mm in splayed distribution, the line outlet groove of deep 6mm, it is ensured that support annulus has enough mechanical strengths, and then improvesThe non-deformability of superconducting coil；
4, the thermally conductive side plate being process using oxygenless copper material according to special structure form is guaranteeing that it is certain that thermally conductive side plate hasOn the basis of conduction cooling effect, eddy-current loss when thermally conductive side plate works can be substantially reduced and make it have enough machineryIntensity；
5, it is fixed in composite material support inner ring using circumferentially radially distributed stainless reinforcing pull rod, one end, the other endIt is fixed on stainless bracing members outer ring, while not bringing more eddy-current loss, the overall mechanical strength of device can be increased.
Detailed description of the invention
Fig. 1 is main view of the invention；
Fig. 2 is side view of the invention；
Fig. 3 is the structural schematic diagram of multilayer transition superconductive tape of the present invention；
Fig. 4 is the structural schematic diagram of present invention support annulus；
Fig. 5 is the structural schematic diagram of the thermally conductive side plate of the present invention.
Description of symbols in figure: 1-high temperature superconductor coil, 2-support inner ring, 3-multilayer transition superconductive tapes, 4-hold roundRing, 5-multilayer transition stainless steel bands, 6-support outer rings, 7-thermally conductive side plates, 8-transition cold bridges, 9-sealing side plates, 10-drawBar, 11-current feeds.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Shown in reference picture 1, Fig. 2, the invention discloses a kind of HTS-SMES magnet devices, including high temperature superconductor coil1, support inner ring 2, multilayer transition superconductive tape 3, support annulus 4, multilayer transition stainless steel band 5, support outer ring 6, thermally conductive side plate 7,Transition cold bridge 8, sealing side plate 9, pull rod 10 and current feed 11.
The high temperature superconductor coil 1 requires to be wound in support inner ring 2 according to technique, and 4 sets of the support annulus exists1 outside of high temperature superconductor coil, gap between the two is filled using multilayer transition superconductive tape 3.The supportIn 4 outside of support annulus, gap between the two is filled using multilayer transition stainless steel band 5 for 6 sets of outer ring.It is describedThermally conductive side plate 7 be located at 1 two sides of high temperature superconductor coil, and be connected by screw bolts form respectively with support inner ring 2 and support outer ring 6It is attached fixation.The transition cold bridge 8 is process using oxygenless copper material, for cold source cooling capacity to be transmitted to thermally conductive sideIt on plate, is fixed between 7 end of thermally conductive side plate of two sides, is connected by screw bolts form and thermally conductive side plate 7 is attached fixation.InstituteThe sealing side plate 9 stated, which is bolted, is separately fixed at thermally conductive 7 side of side plate, and the pull rod 10 is located at outside sealing side plate 9Side, both ends are bolted with support outer ring 6 and support inner ring 2 respectively, are circumferentially distributed according to certain rule.InstituteThe current feed 11 stated is attached with 1 both ends current joint of high temperature superconductor coil respectively by welding manner, and passes through supportThe wire casing of annulus 4 and support outer ring 6 is fixed on the epoxidized block in outside, and all components recycle Low-temperature epoxy glue after being completedNormal-temperature vacuum dipping casting is carried out, all components are solidified.
The high temperature superconductor coil 1 is formed by high-temperature superconductor band coiling, using double cake structures, can be divided into it is round andTwo kinds of structure types of D-shaped, are formed by superconducting tape continuous coiling, the both ends current joint of coil from ipsilateral extraction, and with it is describedCurrent feed 11 carry out linking fixation.High temperature superconductor coil 1 is used as current carrying element, and operating temperature is generally 30K or so, is poweredAfter convert electrical energy into magnetic field energy and store, according to system requirements complete its energy storage and release can function, there is zero resistance and heightThe characteristics such as current density.
The support inner ring 2 is woven using galss fiber reinforced resin based composites, and using staged circleRing structure, maximum outside diameter is consistent with 1 internal diameter of high temperature superconductor coil, inside support and thermally conductive side for high temperature superconductor coil 1The end of plate 7 and pull rod 10 is fixed.In the superconducting magnetic energy storage course of work, the magnetic field of support 2 present position of inner ring is entireEddy-current loss when magnet apparatus work can be significantly reduced using nonmetallic composite in maximum region in magnet apparatus.TogetherWhen, it is woven using glass fiber material, there is preferable mechanical strength, provided to prevent superconducting coil from mechanical damage occurEffective guarantee.
The multilayer transition superconductive tape 3 uses n(3~6) root superconductive tape is spliced, and it is super for alleviating and reducing high temperatureThe two shrinks the gap of interface in a low temperature of loop 1 is caused from support annulus 4 due to different shrinking percentages.Every superconduction belt lengthDegree is calculated by a circle in locating diametrical position, and every superconductive tape remains open, and fracture is wrapped up using Kapton Tape,The fracture present position of adjacent two circle keeps interval 360/n degree in circumferencial direction.Fig. 3 show 3 layers of transition superconduction band structure and showsIt is intended to, 120 degree is spaced on the fracture of every circle superconductive tape and the fracture circumferencial direction of adjacent turn.
The support annulus 4 is woven using galss fiber reinforced resin based composites, internal diameter and multilayer mistakeIt is consistent to cross 3 outer diameter of superconductive tape, the consistency of thickness of thickness and high temperature superconductor coil 1, annular width is 30~40mm；Support annulus 4On respectively along the outlet direction of 1 both ends current feed 11 of high temperature superconductor coil open up wide 1mm, the line outlet groove of deep 6mm, for electricityThe outlet of lead 11 is flowed, both ends line outlet groove is distributed in splayed, and is distributed in two sides, as shown in figure 4, to keep supporting annulus 4The continuity of structure, so that it is guaranteed that support annulus 4 has enough mechanical strengths.In the superconducting magnetic energy storage course of work, surpassThe electromagnetic force that loop is mainly radially distributed, the deformation tendency for expanding outwardly superconducting coil support annulus 4Preferable mechanical strength improves the non-deformability of superconducting coil.
The multilayer transition stainless steel band 5 uses n(3~6) stainless steel band of the root thickness less than 0.3mm be spliced,For alleviate and reduce support annulus 4 with support outer ring 6 caused due to different shrinking percentages in a low temperature of both contraction interfaceGap.Every stainless steel band length is calculated by a circle in locating diametrical position, and every stainless steel band remains open, fracture and notRust steel band ontology is all made of Kapton Tape and is wrapped up, and the fracture present position of adjacent two circle keeps being spaced in circumferencial direction360/n degree.
The support outer ring 6 is process using stainless steel material, and using the outer square structure of inner circle, internal diameter and supportThe outer diameter of annulus 4 is consistent, and thickness and support 4 consistency of thickness of annulus, the maximum width from inner circle to outside are no more than 20mm.
The thermally conductive side plate 7 is process using oxygenless copper material according to special structure form, as shown in figure 5, and adoptingWith square structure outside inner circle, for the conduction cooling of high temperature superconductor coil 1, with a thickness of 3mm~6mm, plate face open up a series of 1mm~The straight trough of 3mm wide, radical length need to ensure notch beyond radial zone where superconducting coil, and notch circumferentially radially dividesCloth, the maximum distance between slot are 15~20mm, and the width in the neighbouring unslotted region of ambient external and inner circle is 15~20mm.TogetherWhen, the notch of central region is all cut off towards center of circle direction in the horizontal direction, so that the unslotted region disjunction near inner circle, losesGo continuity.
This design can substantially reduce thermally conductive side plate 7 on the basis of guaranteeing that thermally conductive side plate 7 has certain conduction cooling effectEddy-current loss when work, and enough mechanical strengths can be made it have；Further effect is, opens up the lesser slot of widthMouthful, it is possible to reduce the glue consumption impregnated during subsequent cure, and then reduce the amount for being mixed into bubble, obtain dipping solidification effectTo improve.
The sealing side plate 9 is process using epoxy phenolic laminated glass fabric plate, and using the outer square structure of inner circle, is usedIn integrally-built encapsulation, interior circular diameter is consistent with the support internal diameter of inner ring 2, the outside ruler of side dimension and support outer ring 6It is very little consistent, with a thickness of 3~5mm.
The pull rod 10 is process using stainless steel material, is circumferentially radially distributed, and is distributed in left and right twoThe quantity Relative distribution of side is more in upper and lower sides quantity, for further increasing the overall mechanical strength of device, while not bandCarry out more eddy-current loss.For pull rod 10 with a thickness of 5~10mm, width is 15~25mm, and length dimension is according to the diameter of superconducting coilIt is determined to length.
The current feed 11 is spliced using oxygen-free copper stripe and superconductive tape according to particular form, wherein oxygen-free copper stripeWidth and thickness it is consistent with the width and thickness of superconductive tape respectively, be attached between the two by welding manner.
Above-described is only presently preferred embodiments of the present invention, does not illustrate limitation of the invention, should for being similar toThe HTS-SMES magnet device of structure is regarded as protection scope of the present invention.