CN105627560A - High-temperature continuous nitrogen heater - Google Patents
High-temperature continuous nitrogen heater Download PDFInfo
- Publication number
- CN105627560A CN105627560A CN201511001408.1A CN201511001408A CN105627560A CN 105627560 A CN105627560 A CN 105627560A CN 201511001408 A CN201511001408 A CN 201511001408A CN 105627560 A CN105627560 A CN 105627560A
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- Prior art keywords
- heating unit
- cooled
- water
- cylinder
- positive electrode
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/02—Resistances
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides a high-temperature continuous nitrogen heater. The high-temperature continuous nitrogen heater comprises a cylinder, a water cooling positive electrode, a water cooling negative electrode and a heating element; the heating element is mounted on the axis of the cylinder, and one end thereof is connected with the water cooling positive electrode through a slide transfer piece; the water cooling positive electrode is connected with a power supply by penetrating out of a water cooling end surface flange tightly connected to one end of the cylinder; the other end of the heating element penetrates out of a graphite baffle plate at the other end of the closed cylinder; upper and lower two water cooling negative electrodes mounted on the heating element through an electrode transfer disc are connected with the power supply after penetrating out of through holes in the wall of the cylinder; the heating element is a sandwich layer structure consisting of a graphite straight pipe on the outer layer and a graphite straight pipe with a spiral fin on the outer pipe wall on the inner layer; a spiral channel is formed between the outer-layer pipe and the inner-layer pipe through the spiral fin; and a through hole is formed in the slide transfer piece connected to one end of the heating element. The high-temperature continuous nitrogen heater solves the difficulties of thermal expansion of the heating element and high-current electric conduction, and can realize continuous heating of nitrogen currents.
Description
Technical field
The present invention relates to a kind of high temperature continous way nitrogen heater, it is mainly used in wind tunnel experimental research to nitrogen and rare gas element and heats, belong to aerospace field.
Background technology
Conventional hypersonic wind-tunnel generally uses pressurized air or nitrogen as test(ing) medium, and makes gas flow temperature sharply decline when pressurized air or nitrogen expand in jet pipe so that air-flow produces condensation. So in hypersonic wind-tunnel, test(ing) medium is heated by general employing heating installation, avoids air-flow to produce condensation.
In wind-tunnel experimentation to air-flow heating installation often, heat accumulating type and continous way two kinds is mainly contained. Storage heater is by the heating of the heat accumulating element such as metal sheet and ceramic body, the heat stored by heat accumulating element is to gas heating. Continuous heaters can adopt electrically heated, passes to air-flow through heating unit. The continuous heaters adopted now is that metal tube is as heating unit mostly, but the upper temperature limit of metal tube well heater is limited, when gas flow temperature needs to reach more than 1200K time, metal tube well heater cannot realize, and adopts graphite can meet the use of worst hot case as heating unit.
Summary of the invention
Main purpose of the present invention is to solve nitrogen and the problem of rare gas element heat in wind-tunnel experimentation,
High temperature continous way nitrogen heater of the present invention comprises cylinder, water-cooled positive electrode, water-cooled negative potential and heating unit, described heating unit is installed on the axis of described cylinder, by sliding, switching part is connected with described water-cooled positive electrode in its one end, described water-cooled positive electrode passes via the water-cooled end face flange on the one end being sealedly connected on described cylinder and is connected with power supply, and the other end of described heating unit passes from the graphite baffle plate closing the described cylinder the other end, two the described water-cooled negative potentials up and down being arranged on described heating unit by electrode switching dish pass via the through hole on described barrel wall and are connected with power supply, described heating unit directly manages the sandwich structure of the outer tube wall with internal layer with the straight pipe composition of graphite of helical fin by outer field graphite, between outer tube and inner tube, helical channel it is formed with by described helical fin, the slip switching part being connected with described heating unit one end has through hole, the gas flow to from the inlet pipe being installed on described barrel wall can be introduced in the interlayer of described heating unit by this through hole, flow through helical channel therebetween, it is flowed in inner tube via the through hole being arranged on inner layer tube wall again, flow out from the outlet through described graphite baffle plate.
Preferred described cylinder forms sandwich structure by case follower and insulating sleeve, the wall of the close described water-cooled positive electrode of described case follower is provided with inlet pipe, the wall upper-lower position of the close described graphite baffle plate of described case follower and described insulating sleeve offers mutually corresponding through hole respectively, for installing described water-cooled negative potential, and, through hole on described insulating sleeve wall is also for air-flow passage, and the gas flow to by described inlet pipe enters into the space between described insulating sleeve and described heating unit via the through hole on described insulating sleeve wall.
Preferred described water-cooled positive electricity very water-cooled copper electrode, is provided with the insulated enclosure cover processed by four fluorine rods between described water-cooled positive electrode and described water-cooled end face flange.
Preferred described water-cooled negative electricity very water-cooled copper electrode, described water-cooled negative potential is arranged on described case follower by gland and packing seal.
The interior helical layer carbon tube of preferred described heating unit has offered four air inlet through holes at it near tube wall one week first-class interval of described graphite baffle plate.
Preferred described heating unit is maximum can apply 100kW power and 6000A electric current, and its temperature can reach 2500K.
The present invention is a kind of continous way graphite resistance heater, well heater adopts high-purity isostatic pressed graphite spiral tube as heating unit, the invention solves a difficult problem for the thermal expansion of heating unit in heat-processed and conducting heavy current, the present invention can realize the laser heating to stream of nitrogen gas, and outlet nitrogen temperature can reach 2000K.
Accompanying drawing explanation
Fig. 1 is the structure iron of well heater of the present invention.
Fig. 2 is water-cooled anode structure pattern figure. Insulation and sealing structure pattern figure between Fig. 3 water-cooled positive electrode and water-cooling flange. Fig. 4 water-cooled main shell structure schematic diagram.
Fig. 5 sleeve pipe heating unit and spiral tube heating unit and the switching part graph of a relation that slides.
Fig. 6 nitrogen is from airway to cup aisle and dependency structure figure. Fig. 7 two negative potentials and electrode switching dish and heating unit interface chart.
Embodiment
The present invention is described in more detail with reference to the accompanying drawings.
As shown in Figure 1, the high temperature continous way nitrogen heater of the present invention comprises water-cooled positive electrode 1, electrode insulation sealing member 2, water-cooled end face flange 3, admission passage and valve 4, the switching part 5 that slides, outer tube heating unit 6, spiral carbon tube heating unit 7, main housing 8, the heat insulation cylinder 9 of main housing, electrode switching dish 10, water-cooled negative potential 11, set nut 12, airway 13, graphite baffle plate 14, graphite clamp ring 15, water-cooled cup 16, cup heat-preservation cylinder 17, outlet water-cooling flange 18 and outlet flow limited nozzle 19 etc.
Main housing 8 and heat insulation cylinder 9 form sandwich structure, main housing 8 wall on inlet pipe is installed, be connected with gas source by admission passage and valve 4. One end of main housing 8 and heat insulation cylinder 9 is blocked by water-cooled end face flange 3 sealing. The other end is blocked by graphite baffle plate 14 and graphite clamp ring 15 sealing.
Such as Fig. 1, shown in 5, outer tube heating unit 6 is enclosed within spiral carbon tube heating unit 7 skin and forms sandwich structure, with helical fin on the outer tube wall of spiral carbon tube heating unit 7, in interlayer, helical channel is formed by this helical fin, the heating unit that outer tube heating unit 6 and spiral carbon tube heating unit 7 form a whole, by sliding, switching part 5 is connected with water-cooled positive electrode 1 in its one end, slip switching part 5 has aperture, gas can be introduced in the interlayer of heating unit by this aperture, water-cooled positive electrode 1 passes water-cooled end face flange 3 by electrode insulation sealing member 2 and is connected with power supply, the other end of overall heating unit passes from graphite baffle plate 14, four through holes have been offered at a first-class interval of circumference of the tube wall of the close graphite baffle plate 14 of spiral carbon tube heating unit 7, as gas passage, two the water-cooled negative potentials 11 up and down being arranged on outer tube heating unit 6 by electrode switching dish 10 pass via the through hole offered on the respective barrel of main housing 8 and heat insulation cylinder 9 and are connected with power supply. carry out sealing by gland and filler between water-cooled negative potential 11 and main housing 8 to install.
The gas flow to from inlet pipe flows to the space between heat insulation cylinder 9 and outer tube heating unit 6 by the through hole heat insulation cylinder 9 wall, the aperture transferred on part 5 by sliding again flows to helical channel, it is flowed in pipe via carbon tube heating unit 7 four through holes circumferentially again, flows out from airway 13. Main housing 8, heat insulation cylinder 9, outer tube heating unit 6 and spiral carbon tube heating unit 7 are arranged coaxial.
As shown in Figure 2, water-cooled positive electrode 1 makes by fine copper. Water-cooled positive electrode 1 and water-cooled negative potential 11 connect the positive and negative electrode of direct supply respectively, and electric current is introduced outer tube heating unit 6 and spiral carbon tube heating unit 7, and outer tube heating unit 6 and spiral carbon tube heating unit 7 lead to can reach 6000A into electric current; As shown in Figure 7, water-cooled negative potential 11 also adopts copper electrode. It is fixedly connected with by electrode switching dish 10 between water-cooled negative potential 11 with spiral carbon tube heating unit 7; It is connected by the electrode switching part 5 that slides between water-cooled positive electrode 1 with spiral carbon tube heating unit 7, lends the thermal expansion that part 5 can absorb heating unit by sliding while realizing the passing through of big current by sliding.
Water-cooled positive electrode 1 and two water-cooled negative potentials 11 connect the positive and negative electrode of power supply respectively, electric current is by water-cooled positive pole 1, slip switching part 5, outer tube heating unit 6 and spiral tube heating unit 7, water-cooled negative potential 11 is imported through electrode switching dish 10, then returning power supply, outer tube heating unit 6 and spiral tube heating unit 7 are heated up by rear generation heat at electric current.
The inlet duct of main housing 8 is provided with admission passage and valve 4, gas is thus introduced into main housing 8, internal space is entered via the through hole on insulating sleeve 9, then the aperture transferred on part 5 by sliding enters the helical channel between outer tube heating unit 6 and spiral carbon tube heating unit 7, heat exchange is carried out through the gas of helical channel and outer tube heating unit 6 and spiral carbon tube heating unit 7, high temperature nitrogen enters airway 13 by the through hole on spiral carbon tube heating unit 7, then enters water-cooled cup 16. The present embodiment is nitrogen is heated.
The heat insulation cylinder 9 of main housing mainly reduces thermosteresis and the thermal protection of heating unit; It is thermal protection that cup heat-preservation cylinder 17 mainly acts on; Outlet flow limited nozzle 19 mainly act as control nitrogen flow.
As shown in Figure 3, electrode insulation sealing member 2 processes by four fluorine rods, it is possible to plays insulation and effect of sealing.
As shown in Figure 4, main housing 8 adopts interlayer water-cooling structure.
As shown in Figure 6, the main effect of graphite baffle plate 14 and graphite clamp ring 15 stops nitrogen directly not enter water-cooled cup by heating unit from main housing.
The present invention adopts outer tube heating unit 6 and spiral tube heating unit 7 to combine as heating unit, heating unit can pass through big current, this heating unit is maximum can apply 100kW power and 6000A electric current, outer tube heating unit 6 and spiral tube heating unit 7 temperature can reach 2500K, outer tube heating unit 6 and spiral tube heating unit 7 combine heated length and the heating-surface area that can increase air-flow as heating unit, and nitrogen at room or other rare gas elementes can reach 2000K in exit gas flow temperature after heating unit.
The all graphite materials of the present invention all adopt isostatic pressed high purity graphite, and heating unit adopts spiral tube and sleeve structure, and spiral tube structure can increase heat interchanging area and the heat exchange length of gas, thus improves heat exchange efficiency;
The spiral tube temp of heating element that the heat that power supply produces makes raises, thus nitrogen is raised by spiral tube passage temperature after heat exchange;
Conduction is realized by the switching part that slides between spiral tube heating unit and positive electrode, heating unit is in high-temperature expansion process, the switching part that slides can realize the slip between heating unit and electrode and conduction, and in sliding conduction process in high temperature environments, conducting surface can not produce spark phenomenon.
Claims (6)
1. a high temperature continous way nitrogen heater, it is characterised in that: comprise cylinder, water-cooled positive electrode, water-cooled negative potential and heating unit, described heating unit is installed on the axis of described cylinder, by sliding, switching part is connected with described water-cooled positive electrode in its one end, described water-cooled positive electrode passes via the water-cooled end face flange on the one end being sealedly connected on described cylinder and is connected with power supply, and the other end of described heating unit passes from the graphite baffle plate closing the described cylinder the other end, two the described water-cooled negative potentials up and down being arranged on described heating unit by electrode switching dish pass via the through hole on described barrel wall and are connected with power supply, described heating unit directly manages the sandwich structure of the outer tube wall with internal layer with the straight pipe composition of graphite of helical fin by outer field graphite, between outer tube and inner tube, helical channel it is formed with by described helical fin, the slip switching part being connected with described heating unit one end has through hole, the gas flow to from the inlet pipe being installed on described barrel wall can be introduced in the interlayer of described heating unit by this through hole, flow through helical channel therebetween, it is flowed in inner tube via the through hole being arranged on inner layer tube wall again, flow out from the outlet through described graphite baffle plate.
2. high temperature continous way nitrogen heater as described in claim 1, it is characterized in that: described cylinder forms sandwich structure by case follower and insulating sleeve, the wall of the close described water-cooled positive electrode of described case follower is provided with inlet pipe, the wall upper-lower position of the close described graphite baffle plate of described case follower and described insulating sleeve offers mutually corresponding through hole respectively, for installing described water-cooled negative potential, and, through hole on described insulating sleeve wall is also for air-flow passage, the gas flow to by described inlet pipe enters into the space between described insulating sleeve and described heating unit via the through hole on described insulating sleeve wall.
3. high temperature continous way nitrogen heater as described in claim 1, it is characterised in that: described water-cooled positive electricity very water-cooled copper electrode, is provided with the insulated enclosure cover processed by four fluorine rods between described water-cooled positive electrode and described water-cooled end face flange.
4. high temperature continous way nitrogen heater as described in claim 1, it is characterised in that: described water-cooled negative electricity very water-cooled copper electrode, described water-cooled negative potential is arranged on described case follower by gland and packing seal.
5. high temperature continous way nitrogen heater as described in claim 1, it is characterised in that: the interior helical layer carbon tube of described heating unit has offered four air inlet through holes at it near tube wall one week first-class interval of described graphite baffle plate.
6. high temperature continous way nitrogen heater as described in claim 1, it is characterised in that: described heating unit is maximum can apply 100kW power and 6000A electric current, and its temperature can reach 2500K.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001408.1A CN105627560B (en) | 2015-12-28 | 2015-12-28 | High temperature continous way nitrogen heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511001408.1A CN105627560B (en) | 2015-12-28 | 2015-12-28 | High temperature continous way nitrogen heater |
Publications (2)
| Publication Number | Publication Date |
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| CN105627560A true CN105627560A (en) | 2016-06-01 |
| CN105627560B CN105627560B (en) | 2018-06-05 |
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| CN201511001408.1A Active CN105627560B (en) | 2015-12-28 | 2015-12-28 | High temperature continous way nitrogen heater |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106912986A (en) * | 2017-05-04 | 2017-07-04 | 廖向阳 | Heater and heating are not burnt electronic cigarette |
| CN109612678A (en) * | 2018-12-27 | 2019-04-12 | 中国航天空气动力技术研究院 | One kind is for electrode rapid installation device after pipe arc heater |
| CN111197856A (en) * | 2020-01-20 | 2020-05-26 | 北京航天试验技术研究所 | Small-size high temperature air electric heater unit |
| CN111457585A (en) * | 2020-03-27 | 2020-07-28 | 中国航天空气动力技术研究院 | High-temperature pure air heater |
| CN111638243A (en) * | 2020-05-25 | 2020-09-08 | 西安交通大学 | Cylindrical heating rod test section filled with inert gas and air gap sealing method |
| CN112413890A (en) * | 2020-11-23 | 2021-02-26 | 中国航天空气动力技术研究院 | Spiral electric heating body air heating device |
| CN113566044A (en) * | 2021-07-30 | 2021-10-29 | 重庆大学 | Heating method for obtaining continuous high-temperature chlorine |
| CN114513867A (en) * | 2021-12-30 | 2022-05-17 | 北京航天益森风洞工程技术有限公司 | Heating control system and heating control method for aircraft simulation test |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106912986A (en) * | 2017-05-04 | 2017-07-04 | 廖向阳 | Heater and heating are not burnt electronic cigarette |
| CN109612678A (en) * | 2018-12-27 | 2019-04-12 | 中国航天空气动力技术研究院 | One kind is for electrode rapid installation device after pipe arc heater |
| CN111197856A (en) * | 2020-01-20 | 2020-05-26 | 北京航天试验技术研究所 | Small-size high temperature air electric heater unit |
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| CN111638243A (en) * | 2020-05-25 | 2020-09-08 | 西安交通大学 | Cylindrical heating rod test section filled with inert gas and air gap sealing method |
| CN111638243B (en) * | 2020-05-25 | 2021-06-11 | 西安交通大学 | Cylindrical heating rod test section filled with inert gas and air gap sealing method |
| CN112413890A (en) * | 2020-11-23 | 2021-02-26 | 中国航天空气动力技术研究院 | Spiral electric heating body air heating device |
| CN113566044A (en) * | 2021-07-30 | 2021-10-29 | 重庆大学 | Heating method for obtaining continuous high-temperature chlorine |
| CN114513867A (en) * | 2021-12-30 | 2022-05-17 | 北京航天益森风洞工程技术有限公司 | Heating control system and heating control method for aircraft simulation test |
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| Publication number | Publication date |
|---|---|
| CN105627560B (en) | 2018-06-05 |
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