CN103969137B - Under a kind of thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device - Google Patents
Under a kind of thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device Download PDFInfo
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Abstract
The invention provides nanometer heat insulation material heat under a kind of thermal extremes environment to shake Collaborative experiment device, comprise hypersonic aircraft nanometer heat insulation material testpieces, one-level insulation platform of heat, noble metal platinum rhodium compressing tablet, double platinum rhodium temperature sensor, hollow ceramic bar, semicircle clip, back-moving spring, secondary insulation platform of heat, vibration stage body, excitation platform, water-cooling channel, infrared radiation thermal source array, Great Power Adjuster, fixed electorde, connecting rack, light heat-insulating material, shaking table driving governor, ceramic pipe and high-temperature flexible mat.This experimental provision can realize the experiment measuring of hypersonic aircraft nanometer heat insulation material shock resistance under the thermal extremes environment of temperatures as high 1500 DEG C, the load-bearing capacity of novel nano heat-barrier material under thermal extremes environment, anti-heat-proof quality and the security and Reliability Design that use for hypersonic long-range maneuvering-vehicle provide important experimental basis, have important engineer applied be worth the development of hypersonic aircraft.
Description
Technical field
The present invention relates to nanometer heat insulation material heat under a kind of thermal extremes environment to shake Collaborative experiment device, the experiment test of hypersonic aircraft nanometer heat insulation material shock resistance under particularly this experimental provision can realize up to 1500 DEG C thermal extremes environment, the load-bearing capacity of novel nano heat-barrier material under thermal extremes environment, anti-heat-proof quality and the security and Reliability Design that use for hypersonic long-range maneuvering-vehicle provide important evidence.
Background technology
Hypersonic aircraft can realize the remote arrival fast in the whole world, implements effective high-altitude high speed prominent anti-, completes quick precision strike.Owing to having extremely important application value in army and having great strategic importance to national security, hypersonic aircraft has become the focus of each main spacefaring nation research in the world.The flying speed of hypersonic aircraft quickly, generally (is greater than 5 Mach) more than 5 times of velocities of sound, the hypersonic aircraft HTV-2 of U.S. Department of Defense's research and development, and its flight Mach number is up to 22; The sky and space plane with super " territorial sky " striking capabilities that research and development Mach number reaches 14 is being puted forth effort at present by Russia; Ministry of National Defence of France has also carried out the development effort of the hypersonic motor-driven aircraft of Mach 2 ship 12; The design rate of the hypersonic aircraft SHEFEXII of German National space flight center development is up to 12 Mach.In addition, Britain, Japan and other countries have also all carried out the research about hypersonic aircraft technology.Due to the speed of hypersonic aircraft and increasing substantially of flight time, the thermal environment problem produced by Aerodynamic Heating during High Mach number flight becomes very harsh.The temperatures as high 1500 DEG C of some key position of hypersonic aircraft when High Mach number flies, the local temperature as air intake duct and some gesture stability position has even exceeded 1500 DEG C.Therefore the ground experiment under thermal extremes environment is very important to the safe design of hypersonic aircraft.
Some position of long-range hypersonic aircraft is not only among exceedingly odious hot environment, and its high-temperature duration even will reach thousands of second.Because hypersonic aircraft inside is provided with accurate electronic equipment and warhead etc., its temperature does not allow more than 80 DEG C.For weight reduction, the thermal protection space of hypersonic aircraft is very little.Therefore must develop and install high efficiency heat insulation material or thermal protection structure, to reduce hypersonic aircraft surface heat conduction of velocity internally, ensure the safety of internal unit.The requirement of thermally protective materials and structure is: lightweight, thickness is little, the anti-thermal efficiency is high, and common heat insulation material is difficult to meet the demands, and adopts novel nano-material to be meet the important research direction that hypersonic aircraft prevents heat insulation demand in recent years.
Although the heat-proof quality of nanometer heat insulation material is superior, but owing to there is a large amount of minute aperture, loosely organized, the ability of opposing vibration is relatively low, and the anti-heat-barrier material of nanometer therefore how solved intensity is not high can reliably use problem extremely important in ground under high temperature and strong vibration environment.Some thermal protection structure is in order to improve heat insulation usefulness, and the material different by multilayer or unitized construction are made (as shown in Figure 1), and serious safety problem very easily appears in sandwich construction and Complex Assembled Structure.Because long-range hypersonic aircraft is among long high temperature and high vibration environment, fierce shake can cause heat insulation material or thermal protection structure to occur crackle, dislocation, peels off or come off, and causes serious heat to reveal and even causes fatal security incident.Such as, U.S.'s the Space Shuttle Columbia comes off due to one block of external tank protective materials, wing nose thermal protection system is caused to occur slight crack, gas very hot when space shuttle is reentried enters wing from slight crack, wing inner structure is caused to melt, finally cause full machine to explode to disintegrate, loss is very heavy.The hypersonic aircraft HTV-2 of US military development, when second time is taken a flight test, peeling off appears in thermally protective materials, and Aerodynamic Heating parameter exceedes design objective two orders of magnitude, finally causes test failure.Therefore in order to ensure the safe reliability of long-range hypersonic aircraft, must to shake associating ground demonstration test to heat insulation material, the thermal protection struc ture heat of carrying out under high-temperature vibrating condition, the combinational environment of the thermal extremes in simulation hypersonic aircraft High Mach number flight course and strong vibration, checks heat insulation material and structure anti-vibration ability in high temperature environments, anti-effect of heat insulation and stability and reliability by heat Combined Trials method of shaking.This work has very important meaning for the safe design of hypersonic aircraft and reliability assessment.
But, not yet have at present and can carry out heat to the shock resistance of nanometer heat insulation material under up to the thermal extremes environment of 1500 DEG C and to shake the device of Combined Trials test.In order to confirm the anti-heat-barrier material of hypersonic aircraft and the reliability of structure under severe high temperature strong vibration combinational environment, ensure the safety of distance flight, the development departments of current hypersonic aircraft proposes active demand for the resistance to shock test of nanometer heat insulation material under the combinational environment that shakes up to 1500 DEG C of heat, therefore, under thermal extremes environment, the shake development of Collaborative experiment device of nanometer heat insulation material heat not only has important engineering background and is a challenging research topic.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, nanometer heat insulation material heat under a kind of thermal extremes environment is provided to shake Collaborative experiment device, can complete and there is a large amount of minute aperture, loosely organized nano-material surface is measured up to the reliable temperature at the temperature of 1500 DEG C and under strong vibration condition, reaches heat and to shake the object of Collaborative experiment.And heat isolation and Thermal protection can be carried out to the expensive excitational equipment with rubber packing element under up to the exceedingly odious hot environment of 1500 DEG C, ensure vibration excitational equipment can within the time reaching thousands of seconds continuous trouble free service.The load-bearing capacity of novel nano heat-barrier material under thermal extremes environment, anti-heat-proof quality and the safe design that use for hypersonic long-range maneuvering-vehicle provide reliable basis.
The technical scheme that the present invention solves the problems of the technologies described above employing is: under a kind of thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device, comprise: hypersonic aircraft nanometer heat insulation material testpieces, one-level insulation platform of heat, noble metal platinum rhodium compressing tablet, double platinum rhodium temperature sensor, hollow ceramic bar, semicircle clip, back-moving spring, secondary insulation platform of heat, vibration stage body, excitation platform, water-cooling channel, infrared radiation thermal source array, Great Power Adjuster, fixed electorde, connecting rack, light heat-insulating material, shaking table driving governor, ceramic pipe and high-temperature flexible mat, described hypersonic aircraft nanometer heat insulation material testpieces is fixed on one-level insulation platform of heat, noble metal platinum rhodium compressing tablet is pressed on thermometric double platinum rhodium temperature sensor, and by the hollow ceramic bar that four right-angled intersections are installed, the front end of double platinum rhodium temperature sensor is tightly crimped on nanometer heat insulation material testpieces, by the end position of four hollow refractory ceramics bars, be fixed on secondary insulation platform of heat by semicircle clip and back-moving spring, heat shake Combined Trials time double platinum rhodium temperature sensor temperature sensing end owing to being pressed downwards by noble metal platinum rhodium compressing tablet, therefore can be synchronized with the movement up and down with the vibration of secondary insulation platform of heat, the leading section potential energy of double platinum rhodium temperature sensor is made enough under high strength random vibration, to keep close contact with nanometer heat insulation material testpieces all the time, double platinum rhodium temperature sensor reliably can measure the surface temperature of the nanometer heat insulation material testpieces under 1500 DEG C of high temperature strong vibration combinational environments.
Further, described test unit has one-level insulation platform of heat and secondary insulation platform of heat, one-level insulation platform of heat and secondary insulation platform of heat are all horizontally fixed on the excitation platform of vibration stage body, reliable heat isolation that is that the provision for thermal insulation of two-stage combined-type water cold type carrys out guaranteed price costliness and that be easy to the vibratory equipment damaged.
Further, the inside Jia Gong You rotation shape water-cooling channel of described one-level insulation platform of heat and secondary insulation platform of heat, the heat Combined Trials Shi rotation shape water-cooling channel inside that shakes is flow through chilled water and is lowered the temperature to one-level insulation platform of heat and secondary insulation platform of heat.
Further, described infrared radiation heating array is lifted on nanometer heat insulation material testpieces by fixed electorde and connecting rack, infrared radiation thermal source array and vibration stage body and excitation platform between there is no hard coupling part, when making test, infrared radiation thermal source array keeps stationary state, avoids fragile infrared radiation thermal source array due to the random vibration of high strength up and down of excitation platform to be shattered.
Further, two one metal wires of described double platinum rhodium temperature sensor are installed with thin ceramic tubes, make between tinsel and mutually insulated between tinsel and noble metal platinum rhodium compressing tablet, prevent from occurring short circuit phenomenon between tinsel double platinum rhodium temperature sensor and noble metal platinum rhodium compressing tablet.
Further, the end position of described four hollow ceramic bars is provided with 8 back-moving springs altogether, in order to absorb vibratory impulse energy.
Further, right-angled intersection place of described four hollow refractory ceramics bars, be all placed with thickness be 3-4mm high-temperature flexible mat as buffering transition member, in order to absorb vibration time impact energy.
Further, to be that the Elema of 1500 DEG C is arranged in parallel by operating limit temperature form described infrared radiation heating array.
Further, the surrounding of described nanometer heat insulation material testpieces and the top of infrared radiation thermal source array and surrounding are all provided with light heat-insulating material, prevent heat during 1500 DEG C of hot tests from revealing.
Principle of the present invention is:
Infrared radiation thermal source array is installed above nanometer heat insulation material testpieces, powers by connecting Great Power Adjuster, the upper surface of nanometer heat insulation material testpieces is heated.Infrared radiation heating array is lifted on nanometer heat insulation material testpieces by fixed electorde and connecting rack, infrared radiation thermal source array and vibration stage body and excitation platform between there is no hard coupling part, during test, infrared radiation thermal source array will keep stationary state, therefore avoids fragile infrared radiation thermal source array and is shattered due to the high-intensity oscillation of excitation platform.The surrounding of nanometer heat insulation material testpieces and the top of infrared radiation thermal source array and surrounding are all provided with light heat-insulating material, prevent heat leak during 1500 DEG C of hot tests.Shaking table driving governor drives excitation platform to move up and down according to set vibrational waveform and intensity in test, vibrational excitation is carried out to the nanometer heat insulation material testpieces be fixed on one-level insulation platform of heat, with hypersonic aircraft nanometer heat insulation material shock resistance experiment test under the thermal extremes environment realizing temperatures as high 1500 DEG C.
Because double platinum rhodium temperature sensor is the thermopair be made up of two elongated tinsels, elongate form and soft, can upper and lower whipping under the vibration of high strength, causes damage.Therefore one piece is not only used the noble metal platinum rhodium compressing tablet of resistance to 1500 DEG C of high temperature can be pressed in the thermometric end of double platinum rhodium temperature sensor, another block noble metal platinum rhodium compressing tablet is also used to be pressed near the root of double platinum rhodium temperature sensor, by four hollow ceramic bars double platinum rhodium temperature sensor is pressed on nanometer heat insulation material testpieces, during test, double platinum rhodium temperature sensor can keep synchronous vibration with nanometer heat insulation material testpieces under high-intensity oscillation, when avoiding test, the shake of double platinum rhodium temperature sensor damages, ensure that Long Time Thermal shake test time thermometric reliability.
Because double platinum rhodium temperature sensor and noble metal platinum rhodium compressing tablet are conductive metallic material, for avoiding producing short circuit between double platinum rhodium temperature sensor and noble metal platinum rhodium compressing tablet, prevent from occurring short circuit phenomenon between two one metal wires of double platinum rhodium temperature sensor simultaneously, two one metal wires of described double platinum rhodium temperature sensor are all installed with thin ceramic tubes, make between tinsel and insulate between tinsel and noble metal platinum rhodium compressing tablet.
Solid refractory ceramics bar structure elongated under high-temperature vibrating environment easily ruptures, the front end of double platinum rhodium temperature sensor is tightly crimped on nanometer heat insulation material testpieces by the hollow ceramic bar therefore adopting four of hollow structure intersections to install, because ceramic bar is hollow, the free expansion space, inside and outside border of hollow ceramic bar is large, and the Resisting fractre characteristic under high-temperature hot environment is better than solid construction.Four point of crossing are had between four hollow refractory ceramics bars, due to the hard contact of rigid material can be produced between four hollow refractory ceramics bars, easily rupture under strong vibration, therefore in right-angled intersection place of four hollow refractory ceramics bars, all be placed with thickness be the high-temperature flexible mat of 3-4mm as buffering transition member, impact energy during to absorb vibration.The end position of other four hollow ceramic bars is equipped with back-moving spring and connects with secondary insulation platform of heat, also can absorb vibratory impulse energy, the employing of described two-stage vibration reducing measure, avoids the rupture failure of the hollow refractory ceramics bar of rigidity during strong vibration.
In order to this test unit want can exceed most metals material melting point up to the thermal extremes environment of 1500 DEG C under trouble free service, design and manufacture of the present invention two-stage water-cooled insulation platform of heat carries out heat to vibratory equipment that is expensive and that be easy to damage isolates.One-level insulation platform of heat and secondary insulation platform of heat inside are all processed with rotation shape water-cooling channel as shown in Fig. 2, and this design, compared with the through water-cooling channel of linear pattern, has lightweight, that heat-insulating efficiency is high advantage.Additional mass can be produced owing to installing insulation platform of heat, the maximum effective push of excitational equipment will be lowered, what therefore distance is in high-temperature region designs less with the planar dimension of nanometer heat insulation material testpieces closer one-level insulation platform of heat, is mainly used in realizing heat isolation to thermal region high in the middle part of 1500 DEG C of hot environments.Planar dimension due to one-level insulation platform of heat designs less, and its additional mass is also relatively little, also less on the impact of excitational equipment thrust.The planar dimension of secondary insulation platform of heat is relatively large, can cover whole excitation platform completely, and the second heat isolation carried out the thermal extremes environment in test by the secondary insulation platform of heat that planar dimension is larger, ensure that the safe reliability of vibration excitational equipment.Under above-mentioned thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device, the load-bearing capacity of novel nano heat-barrier material under thermal extremes environment, anti-heat-proof quality and the safe design that use for hypersonic long-range maneuvering-vehicle provide reliable experimental basis, have important engineer applied and are worth.
The present invention's beneficial effect is compared with prior art:
(1) the present invention uses the noble metal platinum rhodium compressing tablet of heatproof up to 1800 DEG C to push down the thermometric end of thermometric double platinum rhodium temperature sensor, the front end of double platinum rhodium temperature sensor is crimped on nanometer heat insulation material testpieces by the hollow ceramic bar installed by four right-angled intersections, to ensure that in experimentation double platinum rhodium temperature sensor all the time can with nanometer heat insulation material testpieces intimate surface contact and thermometric reliability.And use back-moving spring to be fixed at the two ends of hollow refractory ceramics bar, back-moving spring can effective apparatus with shock absorbing; High-temperature flexible mat is installed as buffering transition member at the point of crossing place of four hollow ceramic bars, prevents from making rigid ceramic bar produce hard contact point.Absorb the damping technology measure of vibratory impulse energy owing to have employed above-mentioned two-stage, avoid the rupture failure of the rigid hollow refractory ceramics bar that lower four right-angled intersections of high temperature strong vibration combinational environment are installed.In order to enable test unit exceed most metals material melting point up to the thermal extremes environment of 1500 DEG C under trouble free service, design and manufacture two-stage water-cooled insulation platform of heat carries out heat isolation to vibratory equipment that is expensive and that be easy to damage, ensure that the safe reliability vibrating excitational equipment.The present invention reliably can measure the surface temperature of the loose nanometer heat insulation material testpieces of structure comparison, effect of heat insulation and shock resistance under severe 1500 DEG C of high temperature strong vibration combinational environments, the load-bearing capacity of novel nano heat-barrier material under thermal extremes environment, anti-insulative properties and the safe design that use for hypersonic long-range maneuvering-vehicle provide authentic experiments foundation, have important engineer applied be worth the development of hypersonic aircraft.
(2) because double platinum rhodium temperature sensor is the thermopair be made up of two elongated tinsels, elongate form and soft, can upper and lower whipping under the random oscilation of high strength, causes damage.Therefore the present invention not only uses one piece the noble metal platinum rhodium compressing tablet of resistance to 1500 DEG C of high temperature can be pressed in the thermometric end of double platinum rhodium temperature sensor, another block noble metal platinum rhodium compressing tablet is also used to be pressed near the root of double platinum rhodium temperature sensor, by four hollow ceramic bars, double platinum rhodium temperature sensor is pressed on nanometer heat insulation material testpieces, during test, the entirety of double platinum rhodium temperature sensor can keep being synchronized with the movement with nanometer heat insulation material testpieces under high-intensity oscillation, when avoiding test, the shake of double platinum rhodium temperature sensor damages, ensure that Long Time Thermal shakes thermometric reliability in Combined Trials.
(3) because refractory ceramics bar structure solid under high-temperature vibrating environment easily ruptures, the front end of double platinum rhodium temperature sensor is crimped on nanometer heat insulation material testpieces by the hollow ceramic bar therefore adopting four of hollow structure right-angled intersections to install.Because use the ceramic bar structure of hollow, the inside and outside free expansion space of bar is large, and the Resisting fractre characteristic under thermal extremes environment is better, not easy fracture.
(4) there are four contact points between the hollow refractory ceramics bar due to four right-angled intersections installations, therefore there will be the hard contact region of rigidity between ceramic bar, under strong vibration, easily occur crack conditions.The present invention in right-angled intersection place of four hollow refractory ceramics bars, be all placed with thickness be 3-4mm high-temperature flexible mat as buffering transition material, in order to absorb vibration time impact energy.In addition, the end position of four hollow ceramic bars is all provided with eight back-moving springs, also can absorb vibratory impulse energy, the employing of two-stage vibration reducing measure, the rupture failure of rigid hollow refractory ceramics bar when avoiding strong vibration.
(5) design and manufacture of the present invention two-stage combined-type water cold type insulation platform of heat carries out heat isolation to expensive vibratory equipment.Because insulation platform of heat can produce additional mass, impact is had on the effective push of excitational equipment, therefore the planar dimension that distance is in the nanometer heat insulation material testpieces closer one-level insulation platform of heat of high-temperature region designs less, be mainly used in realizing heat isolation to the middle part high-temperature area of 1500 DEG C of thermal environments, because the planar dimension of one-level insulation platform of heat is less, its additional mass is also relatively little, also less on the impact of excitational equipment thrust.The planar dimension of secondary insulation platform of heat is relatively large, whole excitation platform can be covered completely, by the second heat isolation that the secondary insulation platform of heat that planar dimension is larger carries out the thermal extremes environment in test, ensure that the safe reliability for the more fragile vibration excitational equipment of thermal environment.
(6) the equal Jia Gong in the inside of one-level insulation platform of heat and secondary insulation platform of heat You rotation shape water-cooling channel, this design, compared with the through water-cooling channel of linear pattern, has lightweight, the advantage that heat-insulating efficiency is high.
(7) apparatus of the present invention are simple for structure, for the load-bearing capacity of novel nano heat-barrier material under the combinational environment up to 1500 DEG C of thermal extremes and strong vibration, anti-heat-proof quality and safe design provide important experimental test means.
Accompanying drawing explanation
Fig. 1 is hypersonic aircraft nanometer heat insulation material schematic diagram;
Fig. 2 is structural representation of the present invention;
Fig. 3 is the insulation platform of heat inner structure schematic diagram of Han You rotation shape water-cooling channel of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
As shown in Figures 2 and 3, the present invention is made up of with high-temperature flexible mat 19 hypersonic aircraft nanometer heat insulation material testpieces 1, one-level insulation platform of heat 2, noble metal platinum rhodium compressing tablet 3, double platinum rhodium temperature sensor 4, hollow ceramic bar 5, semicircle clip 6, back-moving spring 7, secondary insulation platform of heat 8, vibration stage body 9, excitation platform 10, water-cooling channel 11, infrared radiation thermal source array 12, Great Power Adjuster 13, fixed electorde 14, connecting rack 15, light heat-insulating material 16, shaking table driving governor 17, ceramic pipe 18.Hypersonic aircraft nanometer heat insulation material testpieces 1 is fixed on one-level insulation platform of heat 2, noble metal platinum rhodium compressing tablet 3 is pressed in the thermometric end of thermometric double platinum rhodium temperature sensor 4, and by the hollow ceramic bar 5 that four right-angled intersections are installed, the front end of double platinum rhodium temperature sensor 4 is tightly crimped on nanometer heat insulation material testpieces 1, by semicircle clip 6 and back-moving spring 7 by the end winding support of four hollow refractory ceramics bars 5 on secondary insulation platform of heat 8, heat shake Combined Trials time double platinum rhodium temperature sensor 4 temperature sensing end owing to being pressed downwards by noble metal platinum rhodium compressing tablet 3, therefore can be synchronized with the movement up and down with the vibration of secondary insulation platform of heat 8, the leading section potential energy of double platinum rhodium temperature sensor 4 is made enough under high strength random vibration condition, to keep close contact with nanometer heat insulation material testpieces 1 all the time, thus make double platinum rhodium temperature sensor 4 reliably can measure the surface temperature of the nanometer heat insulation material testpieces 1 under 1500 DEG C of high temperature and strong vibration combinational environment.One-level insulation platform of heat 2 and secondary insulation platform of heat 8 are all horizontally fixed on the excitation platform 10 of vibration stage body 9; the inside Jia Gong You rotation shape water-cooling channel 11 of one-level insulation platform of heat 2 and secondary insulation platform of heat 8; when heat shakes test by the chilled water isolation hot environment of flowing; heat isolation and Thermal protection can be carried out, to reach the object that can ensure the long-time safe and reliable work of vibration excitational equipment of costliness under up to the thermal extremes environment of 1500 DEG C to the rubber closure very easily damaged due to high temperature be in below excitation platform 10 and parts such as excitation moving-coil etc.Infrared radiation thermal source array 12 is installed above nanometer heat insulation material testpieces 1, powers by connecting Great Power Adjuster 13, the upper surface of nanometer heat insulation material testpieces 1 is heated.Infrared radiation heating array 12 is lifted on the top of nanometer heat insulation material testpieces 1 by fixed electorde 14 and connecting rack 15, hard coupling part is not had between infrared radiation thermal source array 12 and excitation platform 10, during test, infrared radiation thermal source array 12 will keep stationary state, therefore avoids fragile infrared radiation thermal source array 12 and damages due to the random vibration of high strength up and down of excitation platform 10.The surrounding of nanometer heat insulation material testpieces 1 and the top of infrared radiation thermal source array 12 and surrounding are all provided with light heat-insulating material 16, prevent heat during 1500 DEG C of hot tests from revealing.Shaking table driving governor 17 drives excitation platform 10 to move up and down according to set vibrational waveform and intensity in an experiment, carries out vibrational excitation to the nanometer heat insulation material testpieces 1 be fixed on one-level insulation platform of heat 2.
Because double platinum rhodium temperature sensor 4 is the thermopairs be made up of two elongated tinsels, elongate form and soft, can upper and lower whipping under the vibration of high strength, very easily causes damage.Therefore one piece is not only used the noble metal platinum rhodium compressing tablet 3 of resistance to 1500 DEG C of high temperature can be pressed in the thermometric end of double platinum rhodium temperature sensor 4, another block noble metal platinum rhodium compressing tablet 3 is also used to be pressed near the root of double platinum rhodium temperature sensor 4, double platinum rhodium temperature sensor 4 is pressed on nanometer heat insulation material testpieces 1 by the hollow ceramic bar 5 installed by four right-angled intersections, during test, double platinum rhodium temperature sensor 4 can keep synchronous vibration with nanometer heat insulation material testpieces 1 under high-intensity oscillation, the shake avoiding double platinum rhodium temperature sensor 4 in experimentation damages, ensure that Long Time Thermal shakes the thermometric reliability of Collaborative experiment.
Because double platinum rhodium temperature sensor 4 and noble metal platinum rhodium compressing tablet 3 are conductive metallic material, in order to avoid producing short circuit between double platinum rhodium temperature sensor 4 and noble metal platinum rhodium compressing tablet 3, prevent from occurring short circuit phenomenon between two one metal wires of double platinum rhodium temperature sensor 4 simultaneously, two one metal wires of double platinum rhodium temperature sensor 4 are all installed with thin ceramic tubes 18, make between tinsel and insulate between tinsel and noble metal platinum rhodium compressing tablet 3.
Because solid refractory ceramics bar structure elongated under high-temperature vibrating environment easily ruptures, the front end of double platinum rhodium temperature sensor 4 is tightly crimped on nanometer heat insulation material testpieces 1 by the hollow ceramic bar 5 therefore adopting four of hollow structure intersections to install, because the free expansion space, inside and outside border of hollow ceramic bar is large, the Resisting fractre characteristic under high-temperature hot environment is better than solid construction.Four point of crossing are had between four hollow refractory ceramics bars 5, firmly contact due to rigidity can be produced between four hollow refractory ceramics bars 5, easily crack conditions is there is under strong vibration, therefore in right-angled intersection place of four hollow refractory ceramics bars 5, all be placed with thickness be the high-temperature flexible mat 19 of 3-4mm as buffering transition member, impact energy during to absorb vibration.The end position of other four hollow ceramic bars 5 is provided with root back-moving spring 7 altogether and connects with secondary insulation platform of heat 8, in order to absorb vibratory impulse energy, and the employing of above two-stage vibration reducing measure, the rupture failure of rigid hollow refractory ceramics bar 5 when avoiding strong vibration.
In order to this test unit want can under the 1500 DEG C of thermal extremes environment exceeding most metals material melting point trouble free service.Design and manufacture of the present invention two-stage water-cooled insulation platform of heat carries out heat to vibratory equipment that is expensive and that be easy to damage isolates.One-level insulation platform of heat 2 is all processed with rotation shape water-cooling channel 11 as shown in Fig. 3 with the inside of secondary insulation platform of heat 8, and this design, compared with the through water-cooling channel of simple linear pattern, has lightweight, that heat-insulating efficiency is high advantage.Additional mass can be produced owing to installing insulation platform of heat, certain influence is had to the effective push of excitational equipment, therefore distance nanometer heat insulation material testpieces 1 is closer, the planar dimension being in the one-level insulation platform of heat 2 of high-temperature region designs smaller, is mainly used in realizing heat isolation to the central region of 1500 DEG C of hot environments.Planar dimension due to one-level insulation platform of heat 2 designs less, and its additional mass is also relatively little, also less on the impact of excitational equipment thrust.The planar dimension of secondary insulation platform of heat 8 is relatively large, whole excitation platform 10 can be covered completely, by the second heat isolation that the secondary insulation platform of heat 8 that planar dimension is larger carries out the thermal extremes environment in experiment, ensure that the safe reliability to the more fragile vibration excitational equipment of thermal environment.Under above-mentioned thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device, the load-bearing capacity of novel nano heat-barrier material under the heat up to 1500 DEG C shakes combinational environment, anti-heat-proof quality and the safe design that use for hypersonic long-range maneuvering-vehicle provide reliable basis, have important engineer applied and are worth.
Non-elaborated part of the present invention belongs to techniques well known.
Claims (9)
1. under a thermal extremes environment, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that comprising: hypersonic aircraft nanometer heat insulation material testpieces (1), one-level insulation platform of heat (2), noble metal platinum rhodium compressing tablet (3), double platinum rhodium temperature sensor (4), hollow refractory ceramics bar (5), semicircle clip (6), back-moving spring (7), secondary insulation platform of heat (8), vibration stage body (9), excitation platform (10), water-cooling channel (11), infrared radiation thermal source array (12), Great Power Adjuster (13), fixed electorde (14), connecting rack (15), light heat-insulating material (16), shaking table driving governor (17), thin ceramic tubes (18) and high-temperature flexible mat (19), described hypersonic aircraft nanometer heat insulation material testpieces (1) is fixed on one-level insulation platform of heat (2), on thermometric end noble metal platinum rhodium compressing tablet (3) being pressed in thermometric double platinum rhodium temperature sensor (4), and double platinum rhodium temperature sensor (4) is tightly crimped on nanometer heat insulation material testpieces (1) by the hollow refractory ceramics bar (5) of being installed by four right-angled intersections, by the end position of four hollow refractory ceramics bars (5), be fixed on secondary insulation platform of heat (8) by semicircle clip (6) and back-moving spring (7), heat shake Combined Trials time double platinum rhodium temperature sensor (4) temperature sensing end pressed downwards by noble metal platinum rhodium compressing tablet (3), can be synchronized with the movement up and down with the vibration of secondary insulation platform of heat (8), the position, front end of double platinum rhodium temperature sensor (4) is made to keep close contact with nanometer heat insulation material testpieces (1) all the time under high strength random vibration, make double platinum rhodium temperature sensor (4) under 1500 DEG C of high temperature strong vibration combinational environments, reliably can measure the surface temperature of more fragile nanometer heat insulation material testpieces (1).
2. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: described experimental provision has one-level insulation platform of heat (2) and secondary insulation platform of heat (8), one-level insulation platform of heat (2) and secondary insulation platform of heat (8) are all horizontally fixed on the excitation platform (10) of vibration stage body (9), reliable heat isolation that is that the provision for thermal insulation of two-stage combined-type water cold type carrys out guaranteed price costliness and that be easy to the vibratory equipment damaged.
3. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: inside Jia Gong You rotation shape water-cooling channel (11) of described one-level insulation platform of heat (2) and secondary insulation platform of heat (8), heat Combined Trials Shi rotation shape water-cooling channel (11) inside that shakes is flow through chilled water and is lowered the temperature to one-level insulation platform of heat (2) and secondary insulation platform of heat (8).
4. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: described infrared radiation thermal source array (12) is lifted on nanometer heat insulation material testpieces (1) by fixed electorde (14) and connecting rack (15), infrared radiation thermal source array (12) and vibration stage body (9) and excitation platform (10) between there is no hard coupling part, when making test, infrared radiation thermal source array (12) keeps stationary state, avoiding fragile infrared radiation thermal source array (12) due to the random vibration of high strength up and down of excitation platform (10) is shattered.
5. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: two one metal wires of described double platinum rhodium temperature sensor (4) are installed with thin ceramic tubes (18), make between tinsel and mutually insulated between tinsel and noble metal platinum rhodium compressing tablet (3), prevent from occurring short circuit phenomenon between tinsel double platinum rhodium temperature sensor (4) and noble metal platinum rhodium compressing tablet (3).
6. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: the end position of described four hollow refractory ceramics bars (5) is provided with 8 back-moving springs (7), altogether in order to absorb vibratory impulse energy.
7. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: right-angled intersection place of described four hollow refractory ceramics bars (5), all be placed with high-temperature flexible mat (19) the conduct buffering transition member that thickness is 3-4mm, impact energy when vibrating in order to absorb.
8. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: to be that the Elema of 1500 DEG C is arranged in parallel by operating limit temperature form described infrared radiation thermal source array (12).
9. under a kind of thermal extremes environment according to claim 1, nanometer heat insulation material heat is shaken Collaborative experiment device, it is characterized in that: the surrounding of described nanometer heat insulation material testpieces (1) and the top of infrared radiation thermal source array (12) and surrounding are all provided with light heat-insulating material (16), prevent heat during 1500 DEG C of hot tests from revealing.
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| CN110160896A (en) * | 2018-03-25 | 2019-08-23 | 上海瀚海检测技术股份有限公司 | A kind of cooling cycle water pipe deflects durable test device and test method |
| CN110274871B (en) * | 2019-07-02 | 2020-04-21 | 北京航空航天大学 | Testing device for heat/vibration coupling test of light heat-proof material in extremely high temperature environment |
| CN112525452B (en) * | 2020-11-06 | 2023-05-12 | 北京强度环境研究所 | High-resistance Wen Jizhen measurement integrated test device |
| CN112649170B (en) * | 2020-12-04 | 2022-10-18 | 中国航天空气动力技术研究院 | Compound heat-proof structure in electric arc wind tunnel test cabin |
| CN113358458B (en) * | 2021-06-03 | 2022-09-27 | 重庆大学 | End plate for compression test suitable for members with different sections |
| CN114309656B (en) * | 2021-12-28 | 2023-11-07 | 北京星航机电装备有限公司 | Powder cleaning method for additive manufacturing of complex titanium alloy wing rudder part |
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