CN103002603B - Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof - Google Patents
Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof Download PDFInfo
- Publication number
- CN103002603B CN103002603B CN201110278478.7A CN201110278478A CN103002603B CN 103002603 B CN103002603 B CN 103002603B CN 201110278478 A CN201110278478 A CN 201110278478A CN 103002603 B CN103002603 B CN 103002603B
- Authority
- CN
- China
- Prior art keywords
- tube
- thin
- walled
- boron nitride
- built
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004806 packaging method and process Methods 0.000 title claims 11
- 230000007704 transition Effects 0.000 claims abstract description 92
- 238000010438 heat treatment Methods 0.000 claims abstract description 46
- 239000000843 powder Substances 0.000 claims abstract description 36
- 239000010935 stainless steel Substances 0.000 claims abstract description 36
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 36
- 239000003292 glue Substances 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 23
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 11
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 229920006335 epoxy glue Polymers 0.000 claims abstract description 7
- 238000012536 packaging technology Methods 0.000 claims abstract 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 189
- 229910052582 BN Inorganic materials 0.000 claims description 185
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 35
- 239000010453 quartz Substances 0.000 claims description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 17
- 239000007790 solid phase Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 5
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 4
- 239000004111 Potassium silicate Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical group NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims 6
- 210000001503 joint Anatomy 0.000 claims 4
- 230000002093 peripheral effect Effects 0.000 claims 3
- 125000006850 spacer group Chemical group 0.000 claims 2
- 238000004146 energy storage Methods 0.000 claims 1
- 238000004382 potting Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 14
- 230000035939 shock Effects 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 40
- 239000003638 chemical reducing agent Substances 0.000 description 23
- 229910052759 nickel Inorganic materials 0.000 description 19
- 235000012239 silicon dioxide Nutrition 0.000 description 17
- 238000005192 partition Methods 0.000 description 15
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 12
- 239000003708 ampul Substances 0.000 description 12
- 238000005254 chromizing Methods 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 10
- 239000011651 chromium Substances 0.000 description 10
- 229910052804 chromium Inorganic materials 0.000 description 9
- 229910001120 nichrome Inorganic materials 0.000 description 9
- 239000006260 foam Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000005452 bending Methods 0.000 description 6
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 6
- 235000019270 ammonium chloride Nutrition 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 239000003961 penetration enhancing agent Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000035807 sensation Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000003491 array Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000002305 electric material Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 229910000809 Alumel Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000521 B alloy Inorganic materials 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005269 aluminizing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000003380 propellant Substances 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 229940123973 Oxygen scavenger Drugs 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
本发明公开了一种内置式多孔加热器电引出及封装技术，所述电引出技术是采用过渡线过渡引出方式，内置式多孔加热器采用铠体封装；铠体由不锈钢圆筒、法兰盘和变径管通过激光焊接在一起构成，所述变径管由薄壁变径管和薄壁管组成，薄壁变径管和薄壁管通过连接环焊接在一起；内置式多孔加热器的一体化发热芯封装在不锈钢圆筒中，过渡线外套绝缘件封装在变径管中；薄壁管中充填无机胶，薄壁变径管中充填氧化镁微粉，薄壁变径管末端及过渡线与外引线的接点用高温环氧胶固封在不锈钢管中。本发明应用于空间飞行器电热推力器所需热控设施的内置式多孔加热器上，使其能够耐高温、抗热震，并具有良好的高温绝缘性能和气密性。The invention discloses a built-in porous heater electric lead-out and packaging technology. The electric lead-out technology adopts a transition line transition lead-out method, and the built-in porous heater is packaged by armor; the armor is made of a stainless steel cylinder and a flange plate. and the reducing tube are formed by laser welding, the reducing tube is composed of a thin-walled reducing tube and a thin-walled tube, and the thin-walled reducing tube and the thin-walled tube are welded together through a connecting ring; the built-in porous heater The integrated heating core is packaged in a stainless steel cylinder, and the insulating part of the transition line jacket is packaged in a reducing tube; the thin-walled tube is filled with inorganic glue, the thin-walled reducing tube is filled with magnesium oxide powder, the end of the thin-walled reducing tube and the transition line The junction with the outer lead is sealed in the stainless steel tube with high temperature epoxy glue. The invention is applied to the built-in porous heater of the thermal control facility required by the electric thruster of the space vehicle, so that it can resist high temperature and thermal shock, and has good high temperature insulation performance and air tightness.
Description
Technical field
The present invention relates to aerospace craft for adjusting the electric heating thruster of its attitude, track, the electricity that is specially a kind of built-in porous heater is drawn, encapsulating structure and method thereof.
Background technology
Built-in porous heater is applied in spacecraft propulsion system, and the direct spray of propellant, to the heater of heater, is heated rapidly (or chemical reaction occurs), produces a large amount of gas, from jet pipe ejection, produces thrust.The electric heating hydrazine thruster of take is example, and the heat decomposition temperature of hydrazine is 450 ℃, emits a large amount of heat during decomposition, makes the temperature of thrust chamber reach 900 ℃.That is to say, the heat generating core of built-in porous heater must bear 900 ℃ of high temperature, and the outer lead that can be connected with satellite socket (polyimides is coated multiply silver-plated copper wire) can only bear 200 ℃ of following temperature.Therefore, heater heater can not adopt the mode of directly being drawn by outer lead.Three-dimensional netted nickel porous evanohm is that the Metallic rod by hollow interconnects and forms, and bar wall very thin (micron dimension), so foamed alloy and welding wiry are very difficult.If employing melting welding, the foamed material of the too high easy damage thin-walled of temperature; If, may there is bad metallurgical reaction under high temperature in employing soldering.
Built-in porous heater is applied in spacecraft propulsion system, each section of temperature difference of heater while working according to thruster, can be divided into 3 sections heater: active section (900 ℃), the transition section of drawing (900～200 ℃) and sealing section (200 ℃).The armour body of integrated heating core is the thrust chamber of thruster, for guaranteeing that propellant is all sprayed by jet pipe, the air-tightness of heater is proposed to high requirement.Therefore, in device package process, must select encapsulating material according to serviceability temperature, also will consider the various material behaviors of heater self, the process program that selection can be implemented, the simultaneously necessary insulation property that guarantee device.These bring difficulty to encapsulation work, there is no the scheme that can use for reference.
Summary of the invention
The object of the present invention is to provide a kind of for built-in porous heater can realize that the electricity that connects the built-in porous heater reliable, airtight effect is good, insulation property are good is drawn, encapsulating structure and method thereof.
Technical scheme of the present invention is:
The electricity of built-in porous heater is drawn, an encapsulating structure, comprises integrated heating core, armour body, transition wire and outer lead; Described integrated heating core comprises heater and heater skeleton; Heater skeleton is formed through solid matter by seven boron nitride tubes, and described solid matter is specially symmetry arrangement centered by the boron nitride tube of six roots of sensation periphery boron nitride tube Yi Yigen center; Center boron nitride tube inner axial tube is placed partition, and the two ends of periphery boron nitride tube have notch, and heater back and forth penetrates periphery boron nitride tube successively through notch, between boron nitride tube, by inorganic glue, fixes; Described armour body consists of together with laser welding stainless steel cylinder, ring flange and reducer pipe, and integrated heating core is encapsulated in stainless steel cylinder; Draw the partition both sides in the porous boron nitride pipe of Hou Cong center that are connected with heater two ends, its one end of described transition wire, and after drawing, its other end is connected with outer lead; Described reducer pipe is comprised of thin-walled reducer pipe and light-wall pipe, and thin-walled reducer pipe and light-wall pipe weld together by connecting ring; Transition wire cover insulation part is encapsulated in light-wall pipe and thin-walled reducer pipe; Filling inorganic glue in light-wall pipe, filling fine magnesium oxide micro-powder in thin-walled reducer pipe, the contact of thin-walled reducer pipe end and transition wire and outer lead uses high-temp epoxy glue sealing in stainless steel tube; Described transition wire is multiply nickel filament, and described outer lead is multiply silver-plated copper wire.
Described integrated heating core upper end bonding diplopore boron nitride disk, integrated heating core lower end is that boron nitride ring is to guarantee the insulation property between integrated heating core and armour body; Its material of described partition is boron nitride; The transition wire being connected with heater two ends passes from center porous boron nitride pipe is drawn from two holes of diplopore boron nitride disk again, then enters light-wall pipe.
Described ring flange is circular, and there is the step with the welding of stainless steel cylinder upper end in edge, and center is porose, for thin-wall pipe welding; The external diameter of light-wall pipe is identical with the diameter in the hole at ring flange center, so that the two fits tightly when welding.
Described inorganic glue is silicate refractory inorganic adhesive, and its solid phase composition and liquid phase ingredient mass ratio are 2: 1; Liquid phase ingredient is potassium silicate solution, its modulus ratio SiO
2/ K
2o=4; Solid phase composition is that SiO 2 powder and alumina powder mix, the mass ratio of SiO 2 powder and alumina powder 3: 1; In SiO 2 powder, the mass ratio of different-grain diameter silicon dioxide is 10 nanometers: 1000 orders: 600 orders: 400 orders: 200 order=1: 2: 2.5: 2.5: 2; In alumina powder, the mass ratio of different-grain diameter aluminium oxide is 1200 orders: 40 order=2: 8.
Described insulating part is thick single hole quartz ampoule and thin single hole quartz ampoule, the thick single hole quartz ampoule of the part overcoat of transition wire in light-wall pipe, the thin single hole quartz ampoule of the part overcoat of transition wire in thin-walled reducer pipe.
Described stainless steel cylinder upper end open, lower end has MEDIA FLOW to portal, and has MEDIA FLOW hand-hole on barrel.
The method that the electricity of built-in porous heater is drawn, encapsulated, comprises the steps:
(1) being connected of transition wire and heater: by transition wire (the multiply nichrome wire that the quality percentage composition of Ni is 80%, the quality percentage composition of Cr is 20%
) doubling, one end is folding, and as the lap-joint with heater, the other end is as the winding silk with heater; The compacting of heater end is put into lap-joint, with being wound around silk, is wound around; Then with energy-accumulating spot welder, will be wound around silk, heater and lap-joint spot-welded together; Again transition wire is drawn from the boron nitride tube of center;
(2) welding of light-wall pipe and ring flange: the lower end of light-wall pipe is inserted in the hole of flange disk center, alignd near the upper surface of stainless steel cylinder with ring flange in the lower end of light-wall pipe, adopt pulse laser soldering equipment that the two is welded together;
(3) ring flange and diplopore boron nitride disk is bonding: with the miniature centre that is drilled in boron nitride disk, output two apertures, be diplopore boron nitride disk, on ring flange lower surface, smear inorganic glue, by diplopore boron nitride wafer presser in inorganic glue, bondline thickness is 0.2～0.3mm, it is at room temperature placed 12 hours, then in stove 80 ℃ insulation 2 hours, 150 ℃ are incubated 2 hours again, with the cooling rear taking-up of stove;
(4) encapsulation of integrated heating core in stainless steel cylinder: first boron nitride ring plate is put into stainless steel bottom of cylinder, then integrated heating core is put into stainless steel cylinder; The transition wire of drawing from the boron nitride tube of center enters light-wall pipe after drawing from two holes of diplopore boron nitride disk again; The step laminating at the upper end of stainless steel cylinder and ring flange edge, adopts pulsed laser welding that stainless steel cylinder and ring flange are welded together, and integrated heating core is fixed in stainless steel cylinder;
(5) filling of inorganic glue in light-wall pipe: inorganic glue is packed in light-wall pipe, subsequently two thick single hole quartz ampoules is enclosed within respectively on two transition wires, and quartz ampoule is inserted in light-wall pipe completely, exhaust in vacuum tank, took out after 10 minutes; In light-wall pipe, add inorganic glue again, embedding compacting, room temperature was placed after 24 hours, device is put into stove and solidify, and 80 ℃ of insulations are after 2 hours, and 120 ℃ of insulations 2 hours, then 150 ℃ of insulations 2 hours, with the cooling rear taking-up of stove;
(6) encapsulation of transition wire in thin-walled reducer pipe: transition wire be fixed on light-wall pipe in after, transition wire is cut off at fold point place, every transition wire is split as two strands of transition wires; Connecting ring is enclosed within to the joint of light-wall pipe and thin-walled reducer pipe, to connecting ring and light-wall pipe lap-joint and connecting ring and thin-walled reducer pipe lap-joint, adopts pulse laser to weld; On four strands of transition wires, put respectively thin single hole quartz ampoule, to filling fine magnesium oxide micro-powder in thin-walled reducer pipe, fixing thin single hole quartz ampoule and transition wire; After transition wire is drawn from thin-walled reducer pipe, utilize energy-accumulating spot welder that two strands of nickel filaments of every transition wire are welded again at gap.
(7) connection of outer lead: multiply silver-plated copper conductor flat is divided into two strands, is herringbone and is wrapped in respectively on two transition wires, ward off tin and reinforce formation outer lead joint, pigtail splice overcoat is protected with heat-shrinkable T bush outside.
Described high-temp epoxy glue is that after being mixed by epoxy resin, curing agent and fine magnesium oxide micro-powder, room temperature is placed 24 hours curing forming, and the part by weight of epoxy resin, curing agent and fine magnesium oxide micro-powder is 10: 10: 1, and described curing agent is diethylenetriamine; Described thick single hole quartz ampoule and light-wall pipe are isometric, and its material of described heat-shrinkable T bush is polytetrafluoroethylene.
Described light-wall pipe is identical with thin-walled reducer pipe wall thickness, and thin-walled reducer pipe is identical with light-wall pipe diameter with the diameter of connecting ring junction, and the internal diameter of connecting ring is identical with the external diameter of light-wall pipe.
In the thermal controls apparatus that the electricity of above-mentioned built-in porous heater is drawn, encapsulating structure is applied to aerospace craft appearance, rail control thruster is used.
In described integrated heating core, heater is bar shaped helical form, and its material is mesh structural porous nichrome or mesh structural porous nichrome aluminum alloy, is to form three-dimensional netted loose structure by the hollow and thin-walled metal rib being interconnected, and its hole is interconnected, is evenly distributed; Porosity is 90～98%, and aperture size is 90～110PPI; In described mesh structural porous nichrome, the quality percentage composition of chromium is 18～35%; In described mesh structural porous nichrome aluminum alloy, the quality percentage composition of chromium is 18～35%, and the quality percentage composition of aluminium is 2～10%.
The internal diameter of described periphery boron nitride tube is 3～5mm, and wall thickness is 0.2～0.5mm, and length is 10～15mm; Described center its length of boron nitride tube be periphery boron nitride tube 4/5ths to 1/2nd between, its thickness is that between a times to two times of periphery boron nitride tube, its internal diameter is identical with periphery boron nitride tube.
Its hole of described boron nitride tube is uniformly distributed on the circumference of pipe, and adjacent two round holes are spaced, and the center of circle of some holes is arranged on the perpendicular bisector of two hole circle center line connectings neighbour; The hole gross area is greater than 50% of tube wall area.
Described partition is bar shaped boron nitride, and its length is identical with length and the wall thickness of center boron nitride tube respectively with thickness, and its width is identical with the internal diameter of center boron nitride tube.
Heater skeleton front end face between the first periphery boron nitride tube to the six periphery boron nitride tubes across in tangent front end face double-walled notch three places that open of two pipes, be respectively the first periphery boron nitride tube and the second tangent place of periphery boron nitride tube, the 3rd periphery boron nitride tube and the tangent place of boron nitride tube, 4th week limit, the 5th periphery boron nitride tube and the 6th tangent place of periphery boron nitride tube; Heater skeleton rear end face is opened rear end face double-walled notch two places at the second periphery boron nitride tube and the 3rd tangent place of periphery boron nitride tube, 4th week limit boron nitride tube and the 5th tangent place of periphery boron nitride tube; Heater skeleton rear end face is opened single wall notch two places at the first periphery boron nitride tube and the tangent extended spot of center boron nitride tube, the 6th periphery boron nitride tube and the tangent extended spot of center boron nitride tube.
The preparation method of above-mentioned integrated heating core, comprises the steps:
(1) preparation of bar shaped helical form heater:
Porous nickel mesh is processed as after the spiral helicine nickel foam of bar shaped, to carrying out vacuum heat after the chromising of the spiral helicine nickel foam employing of bar shaped solid phase chromium implements, obtains mesh structural porous nichrome; Or the spiral helicine nickel foam of bar shaped is adopted to solid phase chromising, after aluminising, carries out vacuum heat again, obtain mesh structural porous nichrome aluminum alloy;
(2) preparation of heater skeleton:
First prepare the preparation of boron nitride tube and boron nitride partition: adopt chemical vapour deposition technique on the carbon-point of various outer diameter or carbon plate, to deposit the boron nitride tube of different-thickness and length, by the method for machinery and calcining, remove the carbon in boron nitride tube or on carbon plate, obtain boron nitride tube or boron nitride partition;
Then by designing requirement, on boron nitride tube, punch, then be cut into designed size;
Finally by seven porose boron nitride tube close-packed arrays, with miniature brill according to designing requirement at periphery boron nitride tube two ends otch;
(3) heater wear around:
Heater penetrates from the first periphery boron nitride tube rear end, then passes through successively the second periphery boron nitride tube to the six periphery boron nitride tubes and front end face double-walled notch, rear end face double-walled notch, finally from the 6th periphery boron nitride tube rear end, passes; Heater two ends penetrate in the boron nitride tube of center and are drawn by transition wire through single wall notch again; Each bending place of bar shaped helical form heater must embed each notch; Be specially: the spiral helicine heater of bar shaped is put into from the first periphery boron nitride tube rear end, arrive after the first periphery boron nitride tube front end, from the second periphery boron nitride tube front end, enter again, arrive behind the second periphery boron nitride tube rear end, enter again the 3rd periphery boron nitride tube, reciprocal successively, finally from the 6th periphery boron nitride tube, pass, then the heater two ends in the first periphery boron nitride tube and the 6th periphery boron nitride tube and two transition wires are welded respectively, then transition wire is drawn from the boron nitride tube of center, guarantee that two pads are in the boron nitride tube of center; When heater enters another root boron nitride tube from a boron nitride tube, its bending place will embed each double-walled notch, when heater two ends enter center boron nitride tube after being connected with transition wire, enter via two single wall notches.
(4) drawing of heater:
Heater two ends are connected by congruent alloy transition line respectively, and transition wire sectional area is 4～5 times of the true sectional area of mesh structural porous material; Whole doubling of every transition wire, two one end reciprocating folding types that close up termination are as lap-joint, and the other end is as being wound around silk; The termination of heater and the lap-joint of transition wire mediate, and with being wound around after silk is fixed, adopt impulsed spot welding; Two transition wires are drawn from the boron nitride tube of center, and partition by two transition wires separately.
Between boron nitride tube, fixedly the inorganic glue of use is silicate refractory inorganic adhesive, by liquid phase ingredient and solid phase composition, is mixed, and its solid phase composition and liquid phase ingredient mass ratio are 2: 1; Liquid phase ingredient is potassium silicate solution, and solid phase composition is that SiO 2 powder and alumina powder mix, the mass ratio of SiO 2 powder and alumina powder 3: 1.
Preparation technology's concrete steps of integrated heating core are as follows:
1) preparation of boron nitride tube and boron nitride sheet
Adopt chemical vapour deposition technique on the carbon-point of various outer diameter, to deposit the boron nitride tube of different-thickness and length, by the method for machinery and calcining, remove the carbon-point in boron nitride tube.Boron nitride piece preparation method is similar.
2) boron nitride tube punching
Determine the parameters such as periphery boron nitride tube and the length of center boron nitride tube, the number of hole, aperture, pitch of holes, set pulse laser machining machine equipment parameter, by designing requirement, punch.
3) cutting of boron nitride tube and boron nitride sheet
Use scribing cut-off machine of many that boron nitride tube and the boron nitride sheet of accomplishing fluently hole are cut by design size, then clean up.
4) porous boron nitride end surfaces otch
By 7 boron nitride tube close-packed arrays, center is slightly short boron nitride tube, and each manages front end face alignment, then with fine wire, ties up fastening; With miniature brill according to designing requirement at the upper and lower end face of heat generating core otch, during operation, slowly polish, avoid large stretch of boron nitride to come off.
5) preparation of bar shaped helical form heater
Nickel foam sheet material is processed into the bar shaped of required size with numerically controlled wire cutting machine, then in thin ceramic tubes, be wound up as helical form, cleaning-drying, by solid phase chromising (or aluminising again after chromising), vacuum heat, obtains the spiral helicine nickel chromium triangle of bar shaped or the nickel chromium triangle aluminium heater of three-dimensional netted porous.
6) heater wear around
Bar shaped helical form heater is back and forth installed to the six roots of sensation porous boron nitride pipe into periphery successively, notice that heater should be placed in notch in the bending place of each pipe end.
7) electricity of heater is drawn
In the boron nitride tube of center, heater two ends are welded together with two transition wires respectively, transition wire passes from inserting the center boron nitride tube of boron nitride partition, and partition by two transition wires separately, prevents short circuit.
8) heater skeleton is fixing
To wear around the periphery six roots of sensation boron nitride tube of heater and center boron nitride tube according to putting in order and otch position cements and places certain hour and solidifies by inorganic glue.
In the preparation method of above-mentioned bar shaped helical form heater: described porous nickel mesh is made through conductive treatment, plating and reduction sintering by polyurethane foam; Porous nickel mesh is processed as after slice shape, according to the structure of built-in porous heater and technical indicator, determines coiling spiral shell footpath and pitch, is wound in helical form, makes bar shaped helical form nickel foam.
Nickel foam solid phase chromium implements is powder embedding chromium implements, powder embedding chromium implements is carried out in tube type high-temperature furnace, wherein: 950～1100 ℃ of temperature, temperature retention time 10～60min, after penetration enhancer is mixed by alumina powder (1200 order), chromium powder (300 order) and ammonium chloride (analyzing pure) and through fully grinding and form, the weight percent of alumina powder, chromium powder and ammonium chloride is that content is (70～83): (15～25): (2～5).
Described solid phase alitizing is pack aluminizing method, in the spiral helicine nickel foam of bar shaped, after solid phase chromising, carry out again solid phase aluminising, pack aluminizing method is carried out in tube type high-temperature furnace, wherein: 700～800 ℃ of temperature, temperature retention time 10～40min, after penetration enhancer is mixed by alumina powder (1200 order), alumel (chemical pure) and ammonium chloride (analyzing pure) and through fully grinding and form, the part by weight of alumina powder, alumel and ammonium chloride is (80～83): 15: (2～5).
When the chromising of described powder investment and aluminising, first with mechanical pump, vacuumize 30min, remove the oxygen in tube type high-temperature furnace, pipeline and penetration enhancer, then pass into protective gas (pure argon), protective gas is carried out deoxygenation and removes water treatment simultaneously.Adopt active nickel oxygen scavenger to remove oxygen, adopt 4A molecular sieve to remove water.When chromising or aluminising, penetration enhancer and sample are loaded in quartz ampoule or alumina tube to high silica cloth or nickel foil sealing for two ends.
Described vacuum heat-treating method is, the sample after chromising or aluminising is put into vacuum furnace, and vacuum degree is (1～5) * 10
-3pa, is heated to after 1000～1100 ℃, and insulation 2～10h, then cools to room temperature with the furnace, obtains mesh structural porous thermo electric material, and cooldown rate is determined by material requirements.
Described porous nickel mesh, according to structure and the technical indicator of built-in porous heater, determines its specification and size.
The invention has the beneficial effects as follows:
1, by transition wire doubling; One end folding formation overlap joint platform, the other end, as being wound around silk, heater end and overlap joint platform are intertwined, then it is spot-welded together to adopt energy-accumulating spot welder will be wound around silk, heater and overlap joint platform.Guaranteed that heater is electrically connected to reliably with transition wire, there is not open circuit phenomenon in device after 20,000 alternating hot and colds of experience.
2, pass through the PROCESS FOR TREATMENT to the split-and-merge of transition wire, and be equipped with the application of reducing armour pipe, make the changeover portion temperature of heater from 900 ℃, be reduced to 200 ℃, the quality of minimizing device, the energy on saving star rapidly.
3, adopt the bonding technology of diplopore boron nitride disk and ring flange; when having solved the insulation protection of built-in porous heater integrated heating core; reduce the channel that air-flow leaks outside, and realized the ability that integrated heating core has certain heat resistanceheat resistant gas shock.
4, adopt configuration voluntarily silicate refractory inorganic adhesive, by exhaust air technique under vacuum condition, solved and in enclosure interior high-temp glue, due to poor fluidity, produced the problem of the defects such as pore, improved the bond strength of colloid and housing simultaneously, extend the length of seal channel, increased the air-tightness of device.
5, by the application of connecting ring, avoided the melting welding of docking between light-wall pipe and thin-walled reducer pipe, reduced welding difficulty, guaranteed the sealing of reducer pipe.。
6, by choosing and proportioning inorganic adhesive solid state powder different-grain diameter, contact area between the microscopic particles of colloid is increased, promoted the bond strength of colloid, liquid is selected high mode potassium silicate solution mutually, improves to a certain extent the water resistance of inorganic glue.
Accompanying drawing explanation
Fig. 1 is the built-in porous heater assembly of the present invention structural representation.
Fig. 2 is heater of the present invention and transition wire connection diagram.
Fig. 3 is heater skeleton structure schematic diagram of the present invention.
Fig. 4 is heater skeleton front end face structural representation of the present invention.
Fig. 5 is integrated heating core rear end face structural representation of the present invention.
Fig. 6 is integrated heating core front end face structural representation of the present invention.
In figure: 1 outer lead, 2 stainless steel tubes, 3 thin-walled reducer pipes, 4 connecting rings, 5 light-wall pipes, 6 ring flanges, 7 MEDIA FLOW hand-holes, 8 stainless steel cylinders, 9 high-temp epoxy glue, 10 outer lead joints, 11 heat-shrinkable T bushs, 12 sub-thread transition wires, 13 thin single hole quartz ampoules, 14 fine magnesium oxide micro-powders, 15 bifilar transition wires, 16 thick single hole quartz ampoules, 17 inorganic glue, 18 diplopore boron nitride disks, 19 integrated heating cores, 20 heaters, 21 center boron nitride tubes, 22 transition contacts, 23 boron nitride rings, 24 partitions, 25 first periphery boron nitride tubes, 26 second periphery boron nitride tubes, 27 the 3rd periphery boron nitride tubes, 28 4th week limit boron nitride tubes, 29 the 5th periphery boron nitride tubes, 30 the 6th periphery boron nitride tubes, 31 front end face double-walled notches, 32 rear end face double-walled notches, 33 is rear end face single wall notch, in figure, identical numbering has same meaning.
Embodiment:
Below by specific embodiment and accompanying drawing in detail the present invention is described in detail.
By the 80Ni20Cr B alloy wire doubling of transition wire 200mm Φ 0.3mm; 5mm as standard folding four times be take in one end, as the overlap joint platform with heater; The other end is as the winding silk with heat generating core.By the heater end lap-joint that slightly compacting is put into transition wire, use and be wound around silk winding about 5～6 circles (Fig. 2); Adopt energy-accumulating spot welder will be wound around silk, heater and lap-joint spot-welded together, spot welding parameter: voltage 14.5V, pressure 10N; Transition wire is penetrated in center boron nitride tube 21 and drawn.
Light-wall pipe 5 (Φ 4.5 * 15mm, wall thickness 0.15mm) is inserted in ring flange 6 centre bores, and the external diameter of light-wall pipe 5 is identical with the diameter of centre bore, makes the two tight fit; Aliging with the end face of ring flange 6 (Φ 18.2 * 3mm) near stainless steel cylinder 8 in light-wall pipe 5 one end, adopts pulse laser soldering equipment that the two is welded together.
(Φ 0.6 with the miniature centre that is drilled in boron nitride disk 18 (Φ 15 * 0.5mm), to output two apertures, two pitch of holes 1.3mm), on end face at ring flange 6 near stainless steel cylinder 8, smear inorganic glue, by BN wafer presser, in high temperature inorganic glue, bondline thickness is between 0.2～0.3mm; Sample is at room temperature placed 12 hours, after in stove 80 ℃ insulation 2 hours, 150 ℃ insulation 2 hours, with the cooling rear taking-up of stove.
BN ring 23 is put into stainless steel cylinder 8 afterbodys, then integrated heating core 19 (Φ 15 * 25mm) is put in stainless steel cylinder 8 (inside dimension: Φ 15.2 * 26.2mm, wall thickness 1.5mm); Transition wire 15 enters light-wall pipe 5 after drawing from two holes of diplopore BN disk 18; Before stainless steel cylinder 8, correct with the step at ring flange 6 edges and fit, adopt pulsed laser welding that cylinder 8 and ring flange 6 are welded together, integrated heating core 19 is fixed in stainless steel cylinder 8.Adopt pulsed laser welding technique to be: electric current 100A; Pulse 0.8; Frequency 10; Defocusing amount 35mm; Laser condensing lens focal length 75mm.
Inorganic glue 17 is packed in light-wall pipe 5, subsequently two thick single hole quartz ampoules 16 (Φ 1.5 * 15mm) is enclosed within respectively on two transition wires 15, and quartz ampoule is inserted in sleeve pipe completely, exhaust in vacuum tank, took out after 10 minutes; Add again inorganic glue 17, embedding compacting, room temperature is placed 24 hours, device is put into stove and solidify, and 80 ℃ are incubated 2 hours, and 120 ℃ are incubated 2 hours, and 150 ℃ are incubated 2 hours, with the cooling rear taking-up of stove.
After transition wire 15 is fixed in light-wall pipe 5, transition wire is cut off at place, fold point, every transition wire is split as two strands of transition wires 12; Connecting ring 4 (Φ 4.8 * 5mm, wall thickness 0.15mm) be enclosed within light-wall pipe 5 and thin-walled reducer pipe 3 (Φ 4.5 * 5mm, Φ 2.5 * 35mm, wall thickness 0.15mm) joint, to connecting ring 4 and light-wall pipe 5 lap-joints and connecting ring 4, adopt pulse laser to weld with thin-walled reducer pipe 3 lap-joints, pulsed laser welding technique is: electric current 100A, pulse 0.8, frequency 24, defocusing amount 40mm, laser condensing lens focal length 75mm; On four strands of transition wires, put respectively thin single hole quartz ampoule 13 (Φ 0.8 * 40mm), to filling fine magnesium oxide micro-powder 14, fixedly quartz ampoule and transition wire in reducer pipe; After transition wire 15 is drawn from thin-walled reducer pipe 3, utilize energy-accumulating spot welder that two strands of nickel filaments of every transition wire are welded again at gap, spot-welding technology: voltage 14.5V, pressure 10N.
Push outer lead 1 (Fy-21 polyimides is coated multiply silver-plated copper wire) one end 5mm insulated hull aside, expose multiply silver-gilt copper wire, multiple thread strands is divided equally to two strands, being herringbone is wrapped on transition wire, ward off tin and reinforce formation contact 10, at contact overcoat, with heat-shrinkable T bush 11 protections, heat gun blows contracting; Adopt high-temp epoxy glue 9 by thin-walled reducer pipe end and transition wire and outer lead joint sealing in stainless steel tube 2 (Φ 3.4 * 15mm, wall thickness 0.15mm).
Be used for the integrated heating core skeleton of built-in porous heater as shown in Figure 3.
It is Φ 15mm * 25mm that built-in porous heater allows the overall space size that integrated heating core occupies; The length of periphery boron nitride tube is 25mm, and external diameter is 5mm, wall thickness 0.3mm; Boron nitride tube 21 length in center are 20mm, and external diameter is 5mm, and wall thickness is 0.5mm; Nitrogen partition 8 is of a size of 20mm * 4mm * 0.5mm.
Fig. 3 is heater skeleton, and by periphery boron nitride tube and slightly short forming with boron nitride partition 24 center boron nitride tube 21, periphery boron nitride tube forms solid matter structure centered by the center of identical caliber boron nitride tube 21; Express simultaneously and on heater skeleton rear end face boron nitride tube, open 32 liang, rear end face double-walled notch and locate, be respectively the second periphery boron nitride tube 26 and the 3rd tangent place of periphery boron nitride tube 27,4th week limit boron nitride tube 28 and the 5th tangent place of periphery boron nitride tube 29; 33 liang, single wall notch is located, and is respectively the first periphery boron nitride tube 25Yu center boron nitride tube 21 tangent extended spots, the 6th periphery boron nitride tube 30Yu center boron nitride tube 21 tangent extended spots.Fig. 4 is skeleton front end face, express skeleton alignment end between six roots of sensation periphery boron nitride tube across opening front end face double-walled notch 31 3 places in the two tangent places of pipe, be respectively the first periphery boron nitride tube 25 and the second tangent place of periphery boron nitride tube 26, the 3rd periphery boron nitride tube 27 and 4th week limit boron nitride tube 28 tangent places, the 5th periphery boron nitride tube 29 and the 6th tangent place of periphery boron nitride tube 30.The integrated heat generating core rear end face of Fig. 5, each bending place of bar shaped helical form heater 20 embeds each rear end face double-walled notch 32; The single wall notch 33 of heater 20 two ends the first periphery boron nitride tubes 25 and the 6th periphery boron nitride tube 30 penetrates with partition 24 center boron nitride tube 21.The integrated heat generating core front end face of Fig. 6, each bending place of bar shaped helical form heater 20 embeds each front end face double-walled notch 31; Transition wire 15 is from passing with partition 24 center boron nitride tube 21.
The critical process of the integrated heating core of built-in porous heater is as follows:
1) preparation of boron nitride tube and boron nitride sheet
Boron nitride tube adopts chemical vapour deposition technique on carbon-point, to deposit preparation, has two kinds of specifications, and specification one its length is 90mm, and external diameter is 5.0mm, and wall thickness is 0.3mm, and specification two its length are 90mm, and external diameter is 5.0mm, and wall thickness is 0.5mm.While cvd nitride boron sheet, specification is 100mm * 4mm * 0.5mm.By the method that machinery is removed and calcined, remove the carbon-point in boron nitride tube, careful operation when machinery is removed, avoids damaging boron nitride, and calcining heat is advisable at 750 ℃.
2) boron nitride tube punching
Adopt laser drilling to prepare porous boron nitride pipe, boron nitride tube in technique 1 is arranged on pulse laser machining machine, debugged device parameter (electric current: 190A pulse: 2 frequencies: 8 defocusing amounts :-28 laser condensing lens focal lengths: 100mm), on same circumference, every 45 °, punch hole, totally 8 holes, aperture is 1mm, the distance between two round holes is 1.8mm, have 12 round holes, every 12 round holes, reserved 4.2mm does not punch.
3) cutting of boron nitride tube and boron nitride sheet
The boron nitride tube of specification one is cut into the long segment of 25mm with diamond scribing cutting machine, and wall thickness is 0.3mm, and end surfaces two ends respectively have 2.1mm not punch, and the porous boron nitride pipe after Pipe Cutting is as periphery boron nitride tube.The boron nitride tube of specification two is cut into the segment of length 20mm, wall thickness 0.5mm, and both ends of the surface respectively have 2.1mm not punch, and the porous boron nitride pipe after Pipe Cutting is as center boron nitride tube.Boron nitride sheet is cut into the small pieces of 20mm * 4mm * 0.5mm.The porous boron nitride pipe of well cutting and boron nitride sheet are cleaned up by conventional method.
4) porous boron nitride end surfaces otch
By 6 identical porous boron nitride pipes respectively label be 1 to 6, with another root label center porous boron nitride pipe close-packed arrays that is 7, form the heater skeleton around six symmetrical tangent side's solid matter structures of center boron nitride tube.In each porous boron nitride pipe alignment of skeleton front end face, then with fine wire, tie up fasteningly, with miniature brill, according to designing requirement otch on the tube wall of front/rear end, the width of notch and the degree of depth are respectively 1.5 and 2.0mm, slowly operation, avoids hitting down large stretch of boron nitride.
5) preparation of bar shaped helical form heater:
Foam nickel material is cut into the strip of 1.5mm * 1.2mm * 1000mm, standard with pitch 0.5mm and spiral shell footpath 1.0mm is wound up as helical form in Φ 1.0mm thin ceramic tubes, the length of spiral heating body is in 220mm left and right, utilize solid phase to ooze technology chromising, after vacuum heat, form three-dimensional netted nickel porous evanohm heater.
Solid phase is oozed technology chromising process: at 1000 ℃, be incubated chromising.Penetration enhancer used consists of 1200 object high-purity alumina powders, the high-purity chromium powder of 300 object and analytically pure ammonium chloride to be mixed and fully grinds, and its quality proportioning is 73: 25: 2.First with mechanical pump, vacuumize 30min, then protective gas argon gas is carried out deoxygenation and removes water treatment, temperature retention time 30min; After cooling to 200 ℃ with the furnace, close argon gas, to cleaning-drying sample after room temperature, weigh; Calculating chromium mass fraction is 20～22% (spectral measurement result is very approaching therewith), measuring resistance and size, and resistance value is about 42～50 Ω, and calculated resistance rate is 85～90 μ Ω .m; Subsequently the sample after chromising is put into vacuum furnace, vacuum degree is 5 * 10
-3pa, is warming up to 1100 ℃ with the heating rate of 10 ℃/min, insulation 6h; Cool to room temperature with the furnace, after cleaning-drying, obtain chromium mass fraction and be 20% mesh structural porous nichrome thermo electric material.
Through measuring its resistance value, be about 45～55 Ω, calculated resistance rate is 90～96 μ Ω .m, and porosity is about 96.3%; Intercepting resistance value is the mesh structural porous nichrome heater of built-in porous heater integrated heating core in one section of conduct of 36.5 ± 3.5 Ω.
6) heater wear around
By 6 boron nitride tube numberings of periphery, then bar shaped helical form nickel porous evanohm heater 20 is penetrated from the first boron nitride tube rear port, successively through other periphery boron nitride tubes, finally from the 6th periphery boron nitride tube 30 rear ports, pass, notice that heater each bending place from a pipe to another root pipe all should embed in notch.
7) heat generating core draws
The mesh structural porous nickel chromium triangle heater of bar shaped helical form two ends are welded together with two transition wires 15 respectively, transition wire is 80Ni20Cr (the quality percentage composition of nickel and chromium is respectively 80% and 20%) B alloy wire, and its sectional area is the several times of the true sectional area of mesh structural porous thermo electric material; Whole doubling of every transition wire palpus, two one end reciprocating folding types that close up termination are as lap-joint, and the other end is as being wound around silk; The termination of heater and the lap-joint of transition wire mediate, and with being wound around after silk is fixed, adopt impulsed spot welding; Two transition wires are drawn from skeleton is assigned the center boron nitride tube 7 of boron nitride partition 8, must guarantee insulate between two transition wires.
8) heater skeleton is fixing
6 boron nitride tubes of periphery and the center boron nitride tube 21 use inorganic glue of wearing around heater are fixed, after placement certain hour, treat that inorganic glue is curing, remove fine wire.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278478.7A CN103002603B (en) | 2011-09-19 | 2011-09-19 | Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110278478.7A CN103002603B (en) | 2011-09-19 | 2011-09-19 | Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103002603A CN103002603A (en) | 2013-03-27 |
| CN103002603B true CN103002603B (en) | 2014-08-13 |
Family
ID=47930589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110278478.7A Expired - Fee Related CN103002603B (en) | 2011-09-19 | 2011-09-19 | Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103002603B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019021A (en) * | 1964-07-28 | 1977-04-19 | Schladitz-Whiskers, A.G. | Electric resistance fluid heating apparatus |
| CN201252650Y (en) * | 2008-05-20 | 2009-06-03 | 杨栋 | Low pressure heating element and heating device for heating liquid |
| KR101036509B1 (en) * | 2010-09-30 | 2011-05-24 | 정광호 | Apparatus for making hot water using carbon heater |
-
2011
- 2011-09-19 CN CN201110278478.7A patent/CN103002603B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019021A (en) * | 1964-07-28 | 1977-04-19 | Schladitz-Whiskers, A.G. | Electric resistance fluid heating apparatus |
| CN201252650Y (en) * | 2008-05-20 | 2009-06-03 | 杨栋 | Low pressure heating element and heating device for heating liquid |
| KR101036509B1 (en) * | 2010-09-30 | 2011-05-24 | 정광호 | Apparatus for making hot water using carbon heater |
Non-Patent Citations (2)
| Title |
|---|
| "Mechanical properties of oxidation-resistant Ni-Cr foams";Heeman Choe等;《Materials Science & Engineering》;20041025;第384卷(第1-2期);第184-193页 * |
| "Synthesis,structure,and mechanical properties of Ni-Al and Ni-Cr-Al superalloy foams";Heeman Choe等;《Acta Materialia》;20040308;第52卷(第5期);第1283-1295页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103002603A (en) | 2013-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200059017A1 (en) | Connector assembly of two low temperature superconducting cable terminals and manufacturing method thereof | |
| JP5835904B2 (en) | Transverse welding method and joint structure therefor | |
| CN106735780B (en) | A kind of joint structure and welding method of tube butt welding | |
| CN100490588C (en) | Vacuum high Temperature electric heating pipe and product technology thereof | |
| CN1790881B (en) | The braze end separation layer of generator armature winding bar and the method that applies separation layer | |
| CN103002612B (en) | Built-in porous heater | |
| CN103002603B (en) | Electric leading out and packaging structure of built-in porous heater and electric leading-out and packaging method thereof | |
| CN101979204A (en) | Indirect-heating braze-welding method for packaging shell with thermal sensitive element | |
| CN109712772A (en) | A kind of superconducting magnet helium inlet pipe insulating treatment method | |
| EP3125387A1 (en) | Terminal structure for superconducting cable | |
| US7216796B2 (en) | Crevice corrosion-resistant liquid-cooled armature bar clip-to-strand connection and related method | |
| JPS6344718B2 (en) | ||
| US3590207A (en) | Method of joining wires of different diameters | |
| CN109004779B (en) | Hollow metal part of rotating electrical machine stator, rotating electrical machine, and method for manufacturing hollow metal part | |
| JP2015532166A (en) | Brush manufacturing method and brush obtained by this method | |
| CN103551691B (en) | A kind of welding method of base plate assembly, induction coil and preparation method thereof for its welding | |
| JP2018502448A (en) | Conductor arrangement and method of manufacturing the conductor arrangement | |
| CN100560263C (en) | Brazing chamber and method of applying insulation to brazing ends of generator armature winding bars | |
| CN204068530U (en) | Flame-proof electric motor lead-in wire hermetically-sealed construction | |
| JP2016110740A (en) | Method of manufacturing fluid heating device and fluid heating device | |
| CN105736176A (en) | Strip-shaped heat regenerator applied to heat exchange of Stirling heat engine and manufacturing method thereof | |
| EP1731257B1 (en) | Brazed crevice corrosion-resistant liquid-cooled armature bar clip-to-strand connection and related method | |
| JP2023065163A (en) | Rocket engine combustor and manufacturing method thereof | |
| US20130264330A1 (en) | Medium Voltage Heater | |
| JP2006340521A (en) | Crevice corrosion resistant liquid-cooled armature bar clip and strand joints and related methods |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170919 |