CN204478816U - A kind of low-power consumption high temperature resistance furnace - Google Patents
A kind of low-power consumption high temperature resistance furnace Download PDFInfo
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- CN204478816U CN204478816U CN201520107865.8U CN201520107865U CN204478816U CN 204478816 U CN204478816 U CN 204478816U CN 201520107865 U CN201520107865 U CN 201520107865U CN 204478816 U CN204478816 U CN 204478816U
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Abstract
The utility model relates to a kind of low-power consumption high temperature resistance furnace, described high temperature resistance furnace comprises insulation unit, be arranged in the heater of described insulation unit, be connected to the refractory metal electrode that the end-fitting of described heater is energized to make described heater, wherein, the body of described heater is that spiral hollow cylindrical is to form burner hearth, described high temperature resistance furnace can keep sealing and its inside can be evacuated, thus forms vacuum cavity therein.High temperature resistance furnace of the present utility model has volume feature little, lightweight, low in energy consumption.
Description
Technical field
The utility model relates to a kind of high temperature resistance furnace, more specifically to a kind of Aero-Space low-power consumption high temperature resistance furnace.
Background technology
Materials sciences in space is the basic subject of the research material scientific and engineering under space microgravity environment that the modern space technology of application grows up, and is also the Disciplinary Frontiers of current material science research and development.For the intrinsic rule of physics and chemical process that cognition occurs in material preparation, abundant and improve the basic theory of Materials Science and Engineering, instruct and promote foundation material preparation technology and emerging strategic industries and develop tool and be of great significance.
Carry out materials sciences in space research, high temperature resistance furnace is very important, and its function and performance indications determine the depth & wideth of materials sciences in space research contents.Wherein operating temperature is one of important performance indexes of high temperature resistance furnace, is also material supply section scholar selection material kind, the primary factor of working out the concern of experimental technique Curves.But due to the limitation of space resources, cube is little, lightweight, low in energy consumption again for the high temperature resistance furnace of space application simultaneously.High temperature resistance furnace maximum operating temperature is tested all below 1300 DEG C at the materials sciences in space of space application early stage by China, cannot meet material space that have higher temperature requirement, that have applications well prospect and prepare demand.
Under the purpose of this utility model is to provide a kind of low-power consumption condition, burner hearth maximum temperature can reach the low-power consumption high temperature resistance furnace can applied at aerospace field of more than 1500 DEG C.Realize the furnace temperature of more than 1500 DEG C, general alloy heat generating body, as nickel filament, Fe-Cr-Al wire etc. (the equal <1400 DEG C of serviceability temperature), can not meet the demands, and the conventional high temperature exothermic material such as Elema, Si-Mo rod, graphite of ground high temperature resistance furnace to there is shock strength low, the problems such as resistance is little, and heating current is excessive, are difficult to meeting spatial application requirement.
Utility model content
The purpose of this utility model is to provide a kind of Aero-Space low-power consumption high temperature resistance furnace, and under lower consumption conditions, this high temperature resistance furnace burner hearth maximum temperature can reach 1500 DEG C ~ 1600 DEG C, has the feature that volume is little, lightweight, low in energy consumption simultaneously.
The utility model provides a kind of Aero-Space low-power consumption high temperature resistance furnace, described high temperature resistance furnace comprises insulation unit, be arranged in the heater of described insulation unit, the end-fitting being connected to described heater with the refractory metal making described heater and be energized (such as, the metal that fusing point is greater than 1800 DEG C) electrode, wherein, the body of described heater is that spiral hollow cylindrical is to form burner hearth, described high temperature resistance furnace can keep sealing and its inside can be evacuated, thus form vacuum cavity therein, described refractory metal comprises molybdenum, tungsten or tantalum.
The utility model utilizes the heater of spiral hollow cylindrical itself to form burner hearth, makes heater not only possess heating function, possesses the function forming burner hearth simultaneously, directly heated sample, greatly mention heating efficiency by hyperthermia radiation.
Preferably, described refractory metal electrode comprises by the fixing two panels refractory metal sheet of refractory metal screw, described refractory metal sheet comprises thin-walled end and heavy wall end, two panels refractory metal sheet fixedly makes heavy wall end mutually compress electrified wire by refractory metal screw, the size of the void size coupling heater end-fitting that thin-walled end is formed.
Preferably, described refractory metal screw comprise through refractory metal electrode heavy wall end for make the first refractory metal screw of the tight electrified wire of heavy wall side pressure of two panels refractory metal sheet and through refractory metal electrode thin-walled end with make the end-fitting of described heater be fixed on thin-walled end formed space in the second refractory metal screw.
Preferably, described refractory metal electrode is connected to power supply by Fe-Cr-Al wire wire.
Preferably, the internal diameter of the body of described heater is 10-50mm, and external diameter is 12-60mm, and pitch is 2-4mm, and length is 50-150mm.
Preferably, the end-fitting of described heater is cuboid or column type, and length is 10-50mm, and cross section is the rectangle of (2-10mm) × (2-10mm) or the circle of diameter 3-10mm.
Preferably, the material of described heater is carbon fibre composite, the carbon fibre composite be preferably composited by carbon fiber and silicon-carbide particle.
Carbon fibre composite itself has excellent electricity and resistance to elevated temperatures, and consider that the size requirements of high temperature resistance furnace burner hearth and the heater thermal efficiency utilize, high temperature exothermic body of the present utility model adopts spiral hollow cylindrical, this structure utilizes the shape of heater own to form burner hearth, heater is made not only to possess heating function, possess the function forming burner hearth simultaneously, by hyperthermia radiation directly to sample heating, substantially increase heating efficiency.
The beneficial effects of the utility model:
High temperature resistance furnace in the utility model, under the condition of power consumption lower than 350W, vacuum, maximum temperature can reach 1500 DEG C ~ 1600 DEG C.High temperature resistance furnace of the present utility model have volume little, lightweight, low in energy consumption feature.
Accompanying drawing explanation
Fig. 1 is spiral hollow cylindrical heater in the utility model embodiment;
Fig. 2 is molybdenum screw fastening formula molybdenum electrode in the utility model embodiment;
Fig. 3 is the connected mode of heater end-fitting and screw fastening formula molybdenum electrode in the utility model embodiment;
Fig. 4 is the temperature lift-down curve of high temperature resistance furnace high temperature resistance furnace burner hearth in use in the utility model embodiment;
Fig. 5 is the relation curve of high temperature resistance furnace in heating process between fire box temperature and power consumption in the utility model embodiment.
Detailed description of the invention
Further illustrate the utility model below in conjunction with accompanying drawing and following embodiment, should be understood that accompanying drawing and following embodiment are only for illustration of the utility model, and unrestricted the utility model.
The utility model relates to a kind of low-power consumption high temperature resistance furnace containing high temperature exothermic body, described high temperature resistance furnace comprises heater 1, this heater adopts a kind of carbon fibre composite, this material is compared with the materials such as Si-Mo rod, Elema, graphite, have higher intensity and toughness, less quality, better resistance to sudden heating, resistance sizes is more suitable for application.And compared with refractory metal (as tungsten, molybdenum, tantalum etc.), carbon fibre composite quality is lighter, and there is more stable temperature-coefficient of electrical resistance, be conducive to the accurate control of temperature.Carbon fibre composite is preferably and is composited composite by carbon fiber and silicon-carbide particle, and its density is 1.7-1.8g/cm
3.
See Fig. 1, heater 1 comprises body 2 and end-fitting 3, and the body 2 of heater 1 is formed as hollow cylindrical to form burner hearth.The body of described heater 1 can be formed by shaping hollow cylinder aft-loaded airfoil.Specifically, can first make columned hollow cylinder, then by arranging corresponding cutting process in the lathe of automation, make it cut hollow cylinder, obtaining the heater of described spiral hollow cylindrical.Adopt the mode of above-mentioned lathe grinding to prepare heater, accurately can prepare the heater of different size, carry out the accurate control of heater pitch, length.The internal diameter of the body 2 of heater 1 can be 10-50mm, and external diameter is can 12-60mm, and pitch can be 2-4mm, and length can be 50-150mm.The both ends joint 3 of heater 1 extends from body 2, and be elongate body or cylindrical, length is 10-50mm, and cross section is the rectangle of (2-10mm) × (2-10mm) or the circle of diameter 3-10mm.
High temperature resistance furnace of the present utility model adopts carbon fibre composite as high-temperature heating body, high temperature exothermic body is designed to spiral hollow cylindrical simultaneously, thus on the one hand, high temperature resistance furnace performance can be improved by means of the excellent properties of carbon fibre composite itself, on the other hand, by means of spiral hollow cylindrical, this structure utilizes the shape of heater own to form burner hearth, heater is made not only to possess heating function, possesses the function forming burner hearth simultaneously, by hyperthermia radiation directly to sample heating, substantially increase heating efficiency.
See Fig. 3, heater 1 is arranged in thermal insulation structure 4, and the material of thermal insulation structure can adopt alumina fibre insulating brick.These material weight are light, high temperature resistant, good effect of heat insulation, price are comparatively cheap, are thus conducive to the universal of high temperature resistance furnace in the utility model and apply.
The electrode that described high temperature exothermic body uses when being connected with external circuit adopts molybdenum screw fastening formula molybdenum electrode.Because resistance furnace in the application is intended to realize high-temperature heating, therefore heating-up temperature up to 1500-1600 DEG C, can need the electrode material adopting the material of very high temperature resistant material to be connected with external circuit as high temperature exothermic body.After repeatedly test, we observe, molybdenum electrode can meet high temperature resistance furnace in the utility model one of demand, in addition, molybdenum electrode adopts this structure of screw fastening formula, and realizes good combination between high temperature exothermic body.
Heater 1 temperature is higher, is connected respectively by both ends joint 3 with molybdenum electrode 5.See Fig. 2, molybdenum electrode 5 comprises upper and lower two panels molybdenum sheet 6, the structure that each molybdenum sheet adopts one end thinner than other end thickness respectively, namely, has heavy wall end 7 and thin-walled end 8.Molybdenum sheet 6 is arranged screw by hole to be fixed by screw.The material of screw also selects molybdenum.Screw at least comprises the first screw 9 of the heavy wall end through molybdenum sheet, and by tightening the first screw 9, the thickness end 6 of two panels molybdenum sheet compresses and connects multiply Fe-Cr-Al wire wire.Now thin-walled end 8 due to Thickness Ratio rear wall end thin, thus space is formed between the thin-walled end 8 of two molybdenum sheets, this space is for holding the end-fitting 3 of heater 1, be driven through the second screw 10 of thin-walled end, the end-fitting 3 of heater 1 can be fixed on the space between thin-walled end 8, thus connect heater 1 and molybdenum electrode 5 (see Fig. 3).See Fig. 2, illustrated therein is 3 screws, it should be understood that the number of screw is not limited thereto.
Molybdenum electrode 5 compresses connection multiply Fe-Cr-Al wire wire by the thickness end 6 of two panels molybdenum sheet thus is connected to power supply.
In addition, in the utility model, high temperature resistance furnace is also provided with vacuum cavity.Vacuum cavity can keep vacuum environment, contributes to heat insulation, reduces power consumption, and high-temperature heating body can be avoided oxidized, thus improves the heating properties of high temperature resistance furnace further, extends the service life of high temperature resistance furnace.
Pressure≤1 × 10 are evacuated to by vacuum cavity
-1pa.Due in vacuum environment, can suppress the dissipation of heat on the one hand, also can suppress the oxidation of high temperature exothermic body on the other hand, thus in the utility model, high temperature resistance furnace has this vibrational power flow.In addition, find, when the pressure drop in vacuum cavity is low to moderate pressure≤1 × 10 after the test of utility model people many experiments
-1after this vacuum of Pa, above-mentioned utility model object can realize.
In sum, the utility model high temperature resistance furnace, has following advantage relative to the high temperature resistance furnace of prior art:
1) high temperature resistance furnace adopting high temperature exothermic body of the present utility model to be formed has volume characteristic little, lightweight, low in energy consumption;
2) under the condition of power consumption lower than 350W, the high temperature resistance furnace burner hearth maximum temperature of this heater is adopted can to reach 1500 DEG C ~ 1600 DEG C.This point is the most important utility model object of the utility model.Under the utility model provides a kind of low-power consumption condition, burner hearth maximum temperature can reach the high-efficiency heater of more than 1500 DEG C.Realize the furnace temperature of more than 1500 DEG C, general alloy heat generating body, as nickel filament, Fe-Cr-Al wire etc. (the equal <1400 DEG C of serviceability temperature), can not meet the demands, and the conventional high temperature exothermic material such as Elema, Si-Mo rod, graphite of ground high temperature resistance furnace to there is shock strength low, the problems such as resistance is little, and heating current is excessive, are difficult to meet aerospace applications requirement.For this reason, high temperature exothermic body of the present utility model adopts a kind of carbon fibre composite, compared with the materials such as this material and Si-Mo rod, Elema, graphite, have higher intensity and toughness, less quality, better resistance to sudden heating, resistance sizes is more suitable for space application.And compared with refractory metal (as tungsten, molybdenum, tantalum etc.), carbon fibre composite quality is lighter, and there is more stable temperature-coefficient of electrical resistance, be conducive to the accurate control of temperature.
Exemplify embodiment below further to describe the utility model in detail.Should understand equally; following examples are only for being further described the utility model; can not be interpreted as the restriction to the utility model protection domain, some nonessential improvement that those skilled in the art makes according to foregoing of the present utility model and adjustment all belong to protection domain of the present utility model.The technological parameter etc. that following example is concrete is also only an example in OK range, and namely those skilled in the art can be done in suitable scope by explanation herein and select, and do not really want the concrete numerical value being defined in Examples below.
Embodiment 1
In embodiment 1, the structure of high temperature resistance furnace and performance parameter are reacted by Fig. 1-5.Specifically: Fig. 1 shows spiral hollow cylindrical heater in the present embodiment; Fig. 2 shows molybdenum screw fastening formula molybdenum electrode in the present embodiment; Fig. 3 shows the connected mode of heater end and fastened by screw formula molybdenum electrode in the present embodiment; Fig. 4 shows the temperature lift-down curve of the high temperature resistance furnace burner hearth in use of high temperature resistance furnace in the present embodiment; Fig. 5 shows the relation curve of high temperature resistance furnace in heating process between fire box temperature and power consumption in the present embodiment.
In Fig. 1, spiral hollow cylindrical heater is the spiral hollow cylindrical heater by being processed into by carbon fibre composite, the relative dimensions parameter of calandria is followed successively by: internal diameter 30mm, external diameter 40mm, pitch 3mm, the long 80mm of heater, the long 35mm of end-fitting, contact cross-section is the rectangle of 5 × 5mm.
When in the utility model, high-temperature heating body is connected with external circuit, its left and right end portions needs to connect a pair molybdenum electrode separately.Processing molybdenum screw fastening formula molybdenum electrode 2 is right, and often pair of molybdenum electrode comprises the molybdenum screw of upper and lower two panels molybdenum sheet and 3 M3, and Fig. 2 shows a pair molybdenum screw fastening formula molybdenum electrode.
Connected mode between heater end and molybdenum electrode is shown in Fig. 3.Heater is inserted in heat insulation structure, molybdenum electrode one end connects heater end-fitting, one end connects multiply Fe-Cr-Al wire wire, wherein, high temperature exothermic end of body is clamped between two panels molybdenum sheet, then run through the screw of molybdenum sheet by molybdenum screw and after tightening, realize the connection of molybdenum electrode and high temperature exothermic body.
Vacuum cavity is vacuumized, when vacuum reaches 10
-1during Pa magnitude, high temperature resistance furnace is connected with power supply.Setting voltage-stabilized power supply output voltage≤30V, opens temperature-controlling system power switch, powers up, obtain burner hearth temperature lift-down curve (see Fig. 4), heating process fire box temperature and power consumption profile (see Fig. 5) to high temperature resistance furnace.
Can find out from Fig. 4, in the present embodiment, high temperature resistance furnace can progressively be warming up to 1510 DEG C, and is incubated about 300 minutes at 1510 DEG C, embodies stable service behaviour.Meanwhile, as can be seen from Figure 5, when burner hearth maximum temperature is 1510 DEG C, the power consumption <350W of high temperature resistance furnace in the present embodiment.Find out thus, in the present embodiment, high temperature resistance furnace under the condition of low-power consumption, can stably realize the high-temperature heating of 1500-1600 DEG C.
Claims (6)
1. an Aero-Space low-power consumption high temperature resistance furnace, it is characterized in that, described high temperature resistance furnace comprises insulation unit, be arranged in the heater of described insulation unit, be connected to the refractory metal electrode that the end-fitting of described heater is energized to make described heater, wherein, the body of described heater is that spiral hollow cylindrical is to form burner hearth, described high temperature resistance furnace can keep sealing and its inside can be evacuated, thus forming vacuum cavity therein, described refractory metal comprises molybdenum, tungsten or tantalum.
2. high temperature resistance furnace according to claim 1, it is characterized in that, described refractory metal electrode comprises by the fixing two panels refractory metal sheet of refractory metal screw, described refractory metal sheet comprises thin-walled end and heavy wall end, two panels refractory metal sheet fixedly makes the tight electrified wire of heavy wall side pressure by refractory metal screw, the size of the void size coupling heater end-fitting that thin-walled end is formed.
3. high temperature resistance furnace according to claim 2, it is characterized in that, described refractory metal screw comprise through refractory metal electrode heavy wall end for make the first refractory metal screw of the tight electrified wire of heavy wall side pressure of two panels refractory metal sheet and through refractory metal electrode thin-walled end with make the end-fitting of described heater be fixed on thin-walled end formed space in the second refractory metal screw.
4. high temperature resistance furnace according to claim 1 and 2, is characterized in that, described refractory metal electrode is connected to power supply by Fe-Cr-Al wire wire.
5. high temperature resistance furnace according to claim 1 and 2, is characterized in that, the internal diameter of the body of described heater is 10-50mm, and external diameter is 12-60mm, and pitch is 2-4mm, and length is 50-150mm.
6. high temperature resistance furnace according to claim 5, is characterized in that, the end-fitting of described heater is cuboid or column type, and length is 10-50mm, and cross section is the rectangle of (2-10mm) × (2-10mm) or the circle of diameter 3-10mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104713358A (en) * | 2015-02-13 | 2015-06-17 | 中国科学院上海硅酸盐研究所 | Low-power-dissipation high-temperature resistance furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104713358A (en) * | 2015-02-13 | 2015-06-17 | 中国科学院上海硅酸盐研究所 | Low-power-dissipation high-temperature resistance furnace |
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