CN103487345A - High-temperature flame flow device for dynamically and cyclically testing thermal shock resistance of thermal barrier coating - Google Patents

High-temperature flame flow device for dynamically and cyclically testing thermal shock resistance of thermal barrier coating Download PDF

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CN103487345A
CN103487345A CN201310475477.0A CN201310475477A CN103487345A CN 103487345 A CN103487345 A CN 103487345A CN 201310475477 A CN201310475477 A CN 201310475477A CN 103487345 A CN103487345 A CN 103487345A
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sample
flame
unit
cooling
temperature
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CN103487345B (en
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钟兴华
赵华玉
陶顺衍
周霞明
杨凯
刘晨光
王亮
丁传贤
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Shanghai Institute of Ceramics of CAS
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Shanghai Institute of Ceramics of CAS
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Abstract

The invention relates to a high-temperature flame flow device for dynamically and cyclically testing thermal shock resistance of a thermal barrier coating. The high-temperature flame flow device comprises a rotatable sample mounting unit, a heating unit, a cooling unit and a control unit, wherein the sample mounting unit is used for mounting multiple samples; the heating unit is used for heating coated surfaces of the samples and is provided with at least one flame nozzle with multiple flame cores which are annularly arranged in a shape of a concentric circle; the cooling unit is used for cooling the samples; the control unit is configured to control rotation of the sample mounting unit, so that the multiple samples are alternately heated and cooled. According to the high-temperature flame flow device, a constant temperature field flame flow with a small radial temperature gradient can be formed, and the thermal shock resistance of the multiple samples can be dynamically and cyclically tested concurrently.

Description

Hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance
Technical field
The present invention relates to the thermal barrier coating performance test, particularly, relate to a kind of hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance.
Background technology
Improve aeromotor, especially navigate one of the important channel of the thermal efficiency of sky gas-turbine unit is the Turbine Inlet Gas Temperature that improves this turbine engine.Along with the future development of aeromotor to higher thrust-weight ratio, its Turbine Inlet Gas Temperature is also thereupon constantly soaring, even, under the prerequisite that adopts efficient air film cooling technology, the working temperature of high-pressure turbine guide vane has also surpassed the reliable service temperature of the single crystal super alloy blade that current high-temperature behavior is the most excellent.Therefore, on the surface of blade, adopt heat insulation protective coating (being thermal barrier coating) to become one of effective measures that address this problem.
Thermal barrier coating can significantly reduce the heat that high-temperature fuel gas transmits to the high-temperature alloy blades matrix, reduces the blade surface temperature, and is beneficial to prolongation blade service life.Thermal Barrier Coating Technologies has become one of core technology of aeromotor.The aeromotor of the U.S., European Union and China advances all classifies Thermal Barrier Coating Technologies as one of three large gordian techniquies of the High Performance Aeroengine high-pressure turbine blade technology of laying equal stress on high-temperature structural material, high-efficiency blade cooling technology in the works.Along with the quick propelling of high thrust-weight ratio aeromotor development process, the demand of the heat barrier coat material of the excellent properties such as high temperature resistant to having, heat insulation and heat shock resistance is further urgent.
Wherein, thermal shock resistance is an important performance indexes weighing thermal barrier coating usage performance, is directly connected to its reliability and service life.Can the heat barrier coat material of development meet actual service demand, need by ground stand test run repeatedly, examine to verify in advance.Yet the material of development directly carries out the bench test drive examination, rather high, cycle of cost long, have a big risk.Therefore, for obtaining the preliminary assessment result of heat barrier coat material usage performance, urgently carry out the heat barrier coat material usage behavioral study under the front simulation actual working conditions of bench test drive examination.
Thermal shock resistance test for thermal barrier coating, in high-temperature electric resistance furnace envelope test process, coating and high temperature alloy base material are in a same temperature environment, with the actual military service working condition of thermal barrier coating, differ greatly, although adopt conventional oxygen/acetylene flame to carry out high low temperature circulation impact test to material, but flame stream (flame jet) radial symmetry gradient is larger, can not meet large all test requests of constant temperature field scope, to inevitably cause the sample local overheating, cause the erroneous judgement that coating was lost efficacy, thereby can not truly reflect the thermal shock resistance of coating.Therefore, need the thermal shock resistance test of carrying out the thermal barrier coating under the simulation actual working conditions on the device that can meet large all constant temperature field range test requirements badly.
At present, the equipment that can carry out material thermal shock resistance dynamic test mostly is self-control, there is no unified specification and standard, and the functional parameter difference of distinct device is also larger, and such proving installation purposes has singularity, and many performance parameters will not disclose.The data that can find at present shows, domestic several scientific research institutions have built and take oxygen/coal gas or proving installation that oxygen/acetylene flame stream is thermal source, and the heat enthalpy value of coal gas, acetylene combustion gas flame stream is all lower, and heating efficiency is not strong; And what these several units adopted is that the flame flow nozzle is the single hole flame-thrower nozzle that aperture is less than 30 mm, the bundle spot of flame jet is less, and the flame flow path is larger to thermograde, so the Validity Test regional diameter of flame stream is less than 30 mm.
Summary of the invention
Problem and shortage for above-mentioned existence, technical matters to be solved by this invention is to provide a kind of hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance, can there is the equal constant temperature field flame stream to thermograde than path, and can make that a plurality of samples are parallel carries out the test of thermal shock resistance dynamic circulation.
In order to solve the problems of the technologies described above, the hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance of the present invention, comprising: for the rotating sample installation unit of a plurality of samples is installed; The heating unit heated for the coat side to described sample, described heating unit possesses at least one flame-thrower nozzle with a plurality of inner cones that are the concentric ring-shaped layout; For described sample is carried out to cooling cooling unit; And control module, described control module is configured to control the rotation of described sample installation unit, so that described a plurality of sample alternately carries out heating and cooling.
According to the present invention, by being formed, flame-thrower nozzle there are a plurality of inner cones that are the concentric ring-shaped layout, can make the flame stream produced be laminar condition, to obtain, radial symmetry gradient is little, the comparatively equal permanent flame jet in temperature field, thereby can effectively to the thermal barrier coating thermal shock resistance, carry out the dynamic circulation test.By the rotating sample installation unit that a plurality of samples are installed is set, and control the rotation of this sample installation unit by control module, thereby can make described a plurality of sample alternately carry out heating and cooling again.Thus, can effectively make a plurality of samples automatically carry out concurrently the test of thermal shock resistance dynamic circulation.
Particularly, the present invention makes the flame-thrower nozzle of heating unit carry out the bright eruption heating to the coat side of at least a portion sample in a plurality of samples by control module after, by rotating the sample installation unit, the coat side of this at least a portion sample after making cooling unit to heating is carried out cooling, and the coat side to the remaining sample in a plurality of samples is carried out the bright eruption heating in cooling.Thereby the present invention can be conducive at the automatic cycle testing of being simulated the coating material sample thermal shock resistance under aero engine turbine blades heat barrier coat material military service working condition.
Again, can be also that the aperture of described flame-thrower nozzle is 30 mm~50 mm in the present invention.
According to the present invention, adopt the large aperture flame-thrower nozzle of diameter 30 mm~50 mm, the bundle spot of the flame that can make this flame-thrower nozzle produce stream is larger, is conducive to the thermal shock resistance of thermal barrier coating is carried out to more effective dynamic circulation test.
Again, can be also in the present invention, described heating unit comprises for supplying with the fuel gas supply section of combustion gas, connects the blast tube of described fuel gas supply section and described flame-thrower nozzle, and the ignition mechanism of being lighted a fire for the combustion gas in the exit to described flame-thrower nozzle.
According to the present invention, the combustion gas of being supplied with by fuel gas supply section arrives to flame-thrower nozzle through blast tube, and by ignition mechanism, the combustion gas in the exit of flame-thrower nozzle is lighted a fire, produce flame stream with the exit from this flame-thrower nozzle, thereby can carry out the bright eruption heating to the coat side of sample.
Preferably, this fuel gas supply section can comprise propane source of the gas and oxygen source, and it is mixed separately after filtration, flow regulation and/or pressure adjusting etc., and then is supplied to each flame-thrower nozzle by blast tube.Adopt propane, can have the heat enthalpy value far above coal gas, rock gas and acetylene etc., flame stream heating efficiency is strong.
Again, can be also in the present invention, described sample installation unit comprises that described mounting disc is connected with drive source by gear train for the mounting disc of sample is installed, and to be driven described mounting disc by described drive source, rotates.
According to the present invention, rotate by drive source drive installation dish, thereby can effectively realize the alternately heating and cooling of the coat side of above-mentioned a plurality of samples.
Again, can be also to be provided with the passage that makes the liquid coolant circulation in described mounting disc in the present invention.
According to the present invention, by the passage that makes the liquid coolant circulation is set in mounting disc, can reduce the temperature of mounting disc in test process, prevent that it is overheated, can make again it keep reliable intensity in test process.
Again, can be also in the present invention, described cooling unit comprises the pressurized air supply unit, and with a plurality of compressed-air atomizers that described pressurized air supply unit is connected, each compressed-air atomizer has a plurality of nozzle cores that are the concentric ring-shaped layout.
According to the present invention, by being formed, this compressed-air atomizer there are a plurality of nozzle cores that are the concentric ring-shaped layout, the cold gas that can make to blow on sample is comparatively concentrated and evenly, avoids single-hole nozzle to purge the gas diffusion problem caused, thereby guarantee cooling effect preferably.
Again, can be also that described a plurality of compressed-air atomizers comprise and are set to carry out cooling nozzle and be set to carrying out cooling nozzle for the substrate backside to described sample for the coat side to described sample in the present invention.
According to the present invention, by being set to carry out cooling nozzle and in conjunction with the rotation of sample installation unit for the coat side to sample, can effectively realize to the coat side of at least a portion sample after heating, carrying out alternately cooling to the coat side of a plurality of samples cooling.In addition, can continue to carry out pressure-air cooling to the substrate backside of all samples by being set to carry out cooling nozzle for the substrate backside to described sample always.Thus, can simulate better the military service operating mode comparatively similar to the aero engine turbine blades thermal barrier coating.
Again, can be still to comprise the data acquisition unit of the temperature of cycle of rotation number of times for gathering described sample installation unit and described sample in the present invention.
According to the present invention, by this data acquisition unit, can carry out auto-real-time monitoring, collection and storage to the cycle of rotation number of times of sample installation unit and the temperature of sample.
Preferably, this data acquisition unit can comprise the infrared pyrometer assembly of the temperature of the coat side for gathering sample, and for the thermocouple assembly of the temperature of the substrate backside that gathers sample.Thereby can effectively realize auto-real-time monitoring, collection and the storage of the temperature (comprising the temperature of coat side and the temperature of substrate backside) to sample.In addition, this data acquisition unit can comprise the counter assembly of the cycle of rotation number of times for gathering the sample installation unit.Thereby can effectively realize auto-real-time monitoring, collection and storage to the cycle of rotation number of times of sample installation unit.
Again, can be still to comprise the Leakage Gas monitoring means of the gas leakage for monitoring described heating unit in the present invention.
According to the present invention, by this Leakage Gas monitoring means is set, can be when the gas leakage of heating unit and alarm, thus ensure the safe operation of proving installation and operating personnel's personal safety.
Again, can be still to comprise the temperature-humidity monitoring unit of the humiture of the operating room tested for monitoring in the present invention.
According to the present invention, by this temperature-humidity monitoring unit is set, can be to the humiture Real-Time Monitoring of the operating room that tested, thus ensure the safe operation of proving installation and operating personnel's personal safety.
According to following embodiment and with reference to accompanying drawing, above-mentioned and other purpose of the present invention, feature and advantage will be more clear.
The accompanying drawing explanation
Fig. 1 is the structural representation that the hot flame of dynamic circulation test thermal barrier coating thermal shock resistance of the present invention flows an example of device;
Fig. 2 is the floor map of and air cooling structure living according to the flame miscarriage of an example of hot flame stream device of the present invention;
Fig. 3 is the schematic cross-section according to the flame jet nozzle of an example of hot flame stream device of the present invention;
Fig. 4 is the schematic cross-section according to the compressed-air atomizer of an example of hot flame stream device of the present invention.
Embodiment
Below in conjunction with accompanying drawing and concrete example, the present invention is further detailed explanation.
The hot flame stream device of dynamic circulation test thermal barrier coating thermal shock resistance of the present invention is applicable in the aeromotor field, and the thermal shock resistance of the important performance indexes as weighing thermal barrier coating usage performance is tested.Fig. 1 is the structural representation that the hot flame of dynamic circulation test thermal barrier coating thermal shock resistance of the present invention flows an example of device.And Fig. 3 is the schematic cross-section according to the flame jet nozzle (hereinafter referred to as flame-thrower nozzle) of an example of hot flame of the present invention stream device.
Hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance of the present invention, comprise for the rotating sample installation unit of a plurality of samples is installed; The heating unit heated for the coat side to sample; For sample is carried out to cooling cooling unit; And the control module that the operation of above-mentioned each unit is controlled, this control module is configured to the rotation of Control Assay installation unit so that a plurality of sample alternately carries out heating and cooling.Wherein, the sample that adopts hot flame stream device of the present invention to be tested can be for example to take the high temperature alloy disk as base material, and the positive ceramic heat-barrier coating that adopts thermal spray or gas-phase deposition to prepare of base material.
More specifically, in the present invention, make the flame-thrower nozzle of heating unit carry out the bright eruption heating to the coat side of at least a portion sample in a plurality of samples by control module after, by rotating the sample installation unit, the coat side of this at least a portion sample after making cooling unit to heating is carried out cooling, and the coat side to the remaining sample in a plurality of samples is carried out the bright eruption heating in cooling.Thus, can effectively make the parallel dynamic circulation test of carrying out thermal shock resistance of a plurality of samples.Thereby the present invention can be conducive at the automatic cycle testing of being simulated the coating material sample thermal shock resistance under aero engine turbine blades heat barrier coat material military service working condition.
In the present invention, above-mentioned heating unit possesses the flame-thrower nozzle 9 that at least one has a plurality of inner cones 38 that are concentric ring-shaped layout (specifically with reference to Fig. 3).In the embodiment shown in fig. 1, for example be set to four flame-thrower nozzles 9.By being formed, flame-thrower nozzle 9 there are a plurality of inner cones 38 that are the concentric ring-shaped layout, the flame stream that can make this flame-thrower nozzle 9 produce is laminar condition, to obtain, radial symmetry gradient is little, the comparatively equal permanent flame jet in temperature field, thereby can effectively to the thermal barrier coating thermal shock resistance, carry out the dynamic circulation test.Preferably, this flame-thrower nozzle 9 can be copper.
In addition, the aperture of this flame-thrower nozzle can be 30 mm~50 mm.Adopt the wide-aperture flame-thrower nozzle 9 of 30 mm~50 mm, the bundle spot of the flame stream that can make this flame-thrower nozzle 9 produce is larger.Be conducive to the thermal barrier coating thermal shock resistance is carried out to the dynamic circulation test.For example, as shown in Figure 3, in the present embodiment, the aperture of this flame-thrower nozzle 9 is 50 mm.Under the setting in this aperture, and, in conjunction with the inner cone structure of above-mentioned flame-thrower nozzle 9, according to temperature measurement result, show, in the flame a fluid stream spot scope of diameter 50 mm, the flame flow path, to thermograde (△ T/ △ L)<50 ℃/cm, can be realized the Validity Test of diameter 50 mm samples.
In addition, the said sample installation unit can comprise that mounting disc is connected with drive source by gear train for the mounting disc of a plurality of samples is installed, to be rotated by this drive source drive installation dish.Thereby can effectively realize the alternately heating and cooling of the coat side of above-mentioned a plurality of samples.In the example shown in Fig. 1, this mounting disc is the rotating mounting disc 5 that is configured to eight station mechanical rotating mechanism, and it can install eight samples simultaneously.Can be by such as fixture etc., eight samples being clamped in respectively on eight sample holder stations 8 of this mounting disc 5, thus can carry out the parallel dynamic circulation test of eight samples.
And preferably, this mounting disc 5 can be made by stainless steel, thereby its intensity is high and corrosion resistance is strong.In one embodiment, the diameter of this mounting disc 5 is 900 mm, thick 30 mm of disk, and the position of eight station clamping samples is on the eight equal parts angle of the circumference of mounting disc 5 (45 °).This mounting disc 5 is connected with for example DC servo motor 3 as drive source by transmission shaft 37.By this DC servo motor 3, by transmission shaft 37 drive installation dishes 5, rotated.The support 4 that supports DC servo motor 3 and transmission shaft 37 all is fixed on operator's console 1.
In addition, this sample installation unit can further include electricity loss brake, dead electricity clutch coupling and leads members such as moulding pot (diagram is omitted).The DC servo motor 3 that preferably is equipped with speed reduction unit is connected with mounting disc 5 by transmission shaft 37, through being arranged on leading on transmission shaft 37, moulds potentiometric accurately measurement in real time, makes mounting disc 5 realize accurate rotational angle.And be arranged on electricity loss brake on transmission shaft 37 and be a controlled uncoupling mechanism, while powering on, damping is zero, not hindering mounting disc 5 rotates, during dead electricity, damping is very large, serious obstruction mounting disc 5 is rotated, electricity loss brake and the co-ordination of dead electricity clutch coupling, can realize the function such as release, startup, braking, locking of mounting disc 5.
In addition, can also in mounting disc 5, be provided with the passage (diagram is omitted) that makes the liquid coolant circulation.By make the passage of liquid coolant circulation in the interior setting of mounting disc 5, can reduce the temperature of mounting disc 5 in test process, prevent that it is overheated, can make again it keep reliable intensity in test process.
Again, in the present invention, above-mentioned heating unit can comprise for supplying with the fuel gas supply section 15 of combustion gas, connects the blast tube 12 of fuel gas supply section 15 and flame-thrower nozzle 9, and the ignition mechanism of being lighted a fire for the combustion gas in the exit to flame-thrower nozzle 9 (diagram is omitted).The combustion gas of being supplied with by fuel gas supply section 15 arrives to flame-thrower nozzle 9 through blast tube 12, and by ignition mechanism, the combustion gas in the exit of flame-thrower nozzle 9 is lighted a fire, produce flame stream with the exit from this flame-thrower nozzle 9, thereby can carry out the bright eruption heating to the coat side of sample.
More specifically, this ignition mechanism can be automatic ignition mechanism, comprises automatic ignitor and ultraviolet, infrared signal sensor.Wherein, gas igniting adopts the high voltage pulse sparking mode, ultraviolet, infrared signal sensor Real-Time Monitoring flame status, and by signal feedback to automatic ignitor, therefore can realize after the flame accident extinguishing immediately automatically the function of igniting again.
Preferably, the flame miscarriage that shows an example of hot flame of the present invention stream device as Fig. 2 is given birth to and the floor map of air cooling structure, fuel gas supply of the present invention section 15 can comprise propane source of the gas 19 and oxygen source 25, it is mixed separately after filtration, flow regulation and/or pressure adjusting etc., and then is supplied to each flame-thrower nozzle 9 by above-mentioned blast tube 12.Adopt propane, can have the heat enthalpy value far above gases such as coal gas, rock gas and acetylene, flame stream heating efficiency is strong.
As depicted in figs. 1 and 2, propane source of the gas 19 and oxygen source 25, through the reduction valve of gas circuit separately, filtrator 20,26, solenoid valve 21,27, gas mass flow controller 22,28, gas pressure sensor 23,29, after gas bag 24,30, be divided into four tunnels, each road propane all with a corresponding road oxygen after gas mixer 14 mixes, be supplied to respectively each flame-thrower nozzle 9, and produce flame jet in the igniting of the exit of flame-thrower nozzle 9.Thereby, in this example, the total four road flame streams that eject from four flame-thrower nozzles 9, clamp the mounting disc 5 of sample just facing to four road flame streams.In addition, also can be provided with back fire arrester 13 in the blast tube 12 between above-mentioned fuel gas supply section 15 and flame-thrower nozzle 9.
Again, also see figures.1.and.2, in the present invention, above-mentioned cooling unit adopts air cooling structure, it comprises pressurized air supply unit 16, a plurality of compressed-air atomizers 6,10 that are connected with this pressurized air supply unit 16, each compressed-air atomizer 6,10 has respectively a plurality of nozzle cores 39 that are the concentric ring-shaped layout.By being formed, this compressed-air atomizer 6,10 there are a plurality of nozzle cores 39 that are the concentric ring-shaped layout, the cold gas that can make to blow on sample is comparatively concentrated with even, avoid single-hole nozzle to purge the gas diffusion problem caused, thereby guarantee cooling effect preferably.
Particularly, a plurality of compressed-air atomizers of this cooling unit comprise and are set to carry out cooling nozzle 10 and be set to carrying out cooling nozzle 6 for the substrate backside to sample for the coat side to sample.In the example shown in Fig. 1, for being carried out to cooling nozzle 10, the coat side of sample is set to four, corresponding with the quantity of flame-thrower nozzle 9, thereby can be correspondingly carry out coolingly to the coat side of the sample after heating, effectively realize alternately cooling to the coat side of a plurality of samples.Be set to eight and carry out cooling nozzle 6 for the substrate backside to sample, correspond respectively to eight stations 8 of mounting disc 5, thereby can continue to carry out pressure-air cooling to the substrate backside of all samples always.According to this structure, can simulate better the military service operating mode comparatively similar to the aero engine turbine blades thermal barrier coating.
More specifically, see figures.1.and.2, this pressurized air supply unit 16 can comprise the compressed air reservoir 31 of the air after air compressor and store compressed.Pressurized air in this compressed air reservoir 31, after reduction valve, filtrator 32, solenoid valve 33, gas mass flow controller 34, gas pressure sensor 35, gas bag 36, is divided into 12 road gas pipelines, is connected to respectively a plurality of compressed-air atomizers 6,10.Wherein facing to the eight road gases at mounting disc 5 back sides, be used for the high temperature alloy base material back side of cooling samples, all the other four road gases facing to mounting disc 5 fronts are for the coat side of cooling samples.
In addition, the stream of the hot flame for dynamic circulation test thermal barrier coating thermal shock resistance device of the present invention can also comprise the data acquisition unit of the temperature of cycle of rotation number of times for gathering the said sample installation unit and sample.Can carry out auto-real-time monitoring, collection and storage to the cycle of rotation number of times of sample installation unit and the temperature of sample by this data acquisition unit.
Preferably, this data acquisition unit comprises the infrared pyrometer assembly of the temperature of the coat side for gathering sample, and for the thermocouple assembly of the temperature of the substrate backside that gathers sample.Thereby can effectively realize auto-real-time monitoring, collection and the storage of the temperature (comprising the temperature of coat side and the temperature of substrate backside) to sample.In addition, this data acquisition unit comprises the counter assembly of the cycle of rotation number of times for gathering the sample installation unit.Thereby can effectively realize auto-real-time monitoring, collection and storage to the cycle of rotation number of times of sample installation unit.
As shown in Figure 1, in test process, the coating surface temperature of sample is gathered by Dual band IR pyrometer assembly 17, four temperature of the coat side in the sample of flame heated condition in four infrared pyrometer difference collecting test processes, the pole 18 of supporting infrared pyrometer is fixed on operator's console 1.
Again, the hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance of the present invention can also comprise the Leakage Gas monitoring means of the gas leakage for monitoring above-mentioned heating unit.By this Leakage Gas monitoring means is set, can be when the gas leakage of heating unit and alarm, thus ensure operating personnel's personal safety and the safe operation of proving installation.
Particularly, in this example, although not shown, above-mentioned this Leakage Gas monitoring means comprises propane leak detector assembly and oxygen leakage detector assembly.If the propane leak amount reaches the lower limit of setting, the sound and light alarm of interlock with it will be triggered; Equally, if the oxygen leakage amount makes oxygen content reach the higher limit of setting, also will trigger the sound and light alarm of interlock with it.
Again, the test of thermal barrier coating thermal shock resistance of the present invention is carried out usually in operating room.Therefore, the hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance of the present invention can also comprise the temperature-humidity monitoring unit of the humiture of the operating room tested for monitoring.By this temperature-humidity monitoring unit is set, can be to the humiture Real-Time Monitoring of the operating room that tested, thus ensure the safe operation of proving installation and operating personnel's personal safety.
Particularly, in this example, although not shown, above-mentioned temperature-humidity monitoring unit comprises the humiture detector assembly.Humiture in operating room reaches the higher limit of setting, will trigger the sound and light alarm of interlock with it.
The present invention can control by control module (diagram is omitted) operation of above-mentioned each parts, this control module includes but not limited to control of power supply system module, gas flow control module, automatic ignition control module, eight station mechanical rotating mechanism control modules, Leakage Gas and operating room's temperature-humidity monitoring control module and controls interface etc., each control module can integrate in control module, and the communication interface between this control module and above-mentioned each parts for example can adopt RS422 standard serial asynchronous communication interface.
In addition, also as shown in Figure 1, top, the residing operating room of the hot flame of this example stream device can also be equipped with draught hood 2, and in test process, exhausting is opened in real time, extracts in time waste gas out, guarantees safety.
Adopt the hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance of this example, can carry out following test:
The flame stream of this hot flame stream device can be realized by the flow (ratio) of regulation and control propane and oxygen the heating-up temperature of sample, testing experiment shows, this hot flame stream device can reach 1800 ℃ to the continuous heating temperature of ceramic heat-barrier coating specimen surface, can meet the current probe temperature requirement to high-temp heat barrier coating fully.The beginning of test process, operation, time-out and hold function, all can realize automatic operation, before test starts, after the parameters such as the heating and cooling time of pre-set gas (propane, oxygen and pressurized air) flow, each circulation, cycle index, only need to press " beginning " on touch-screen, test brings into operation automatically.
Propane, oxygen are respectively through the reduction valve of gas circuit separately, filtrator 20,26, solenoid valve 21,27, gas mass flow controller 22,28, gas pressure sensor 23,29, be divided into four tunnels after gas bag 24,30, each road propane all mixes through gas mixer 14 with a corresponding road oxygen, produce flame jet in flame-thrower nozzle 9 exit igniting, have four road flame streams, clamp the mounting disc 5 of sample just facing to four road flame streams.Before test starts by sample holder on the position of the station 8 of mounting disc 5.Hot flame stream device in this example can carry out the cardiopulmonary bypass in beating heart test of eight thermal barrier coating samples, four road flames stream heating correspondingly are wherein after the coat side certain hour of four samples, the mounting disc 5 of clamping sample turns clockwise 45 °, four road flame streams heat the coat side same time of another four samples more correspondingly, simultaneously, front four samples during this period of time coat side carry out pressure-air cooling, afterwards, disk is rotated counterclockwise 45 °, so alternate repetition.
The coat side of sample, through the heating of a flame stream and pressure-air cooling, is a heat shock cycling (be equivalent to mounting disc 5 and rotate 45 °).In test process, the high temperature alloy base material back side of eight samples continues to carry out pressure-air cooling always.On the air cooling mechanism design, the front and back of mounting disc 5 is respectively facing to four Lu He eight road pressurized air gas circuits.The sample cycle test process of above narration is the simulation military service operating mode comparatively similar to the aero engine turbine blades thermal barrier coating.
In test process, the coat side temperature of sample and high temperature alloy base material back temperature are measured, are gathered and storage by infrared pyrometer assembly 17 and thermocouple assembly respectively, and loop test number of times (being mounting disc 5 cycle of rotation number of times) can be counted, gather and be stored by the counter assembly of control module.
Sample is after the test of certain cycle index, and coat side starts cracking, peels off, and to peeling off area, reaches the coating total area approximately 5% the time, judges that the coating sample lost efficacy, and test stops.Under identical probe temperature, cooling condition, the cycling time test condition such as interval, sample starts, to judging that the paralysis period cycle index of experience is more, to show that the circulation thermal shock life of sample is longer from test, and the thermal shock resistance of coating sample is better.
Under the aim that does not break away from essential characteristic of the present invention, the present invention can be presented as various ways, therefore the example in the present invention is to be illustrative rather than definitive thereof, be defined by the claims due to scope of the present invention but not limited by instructions, and drop on the scope that claim defines, or all changes in the full scope of equivalents of its scope defined all are understood to include in claims.

Claims (10)

1. the hot flame stream device for dynamic circulation test thermal barrier coating thermal shock resistance, is characterized in that, comprising:
For the rotating sample installation unit of a plurality of samples is installed;
The heating unit heated for the coat side to described sample, described heating unit possesses at least one flame-thrower nozzle with a plurality of inner cones that are the concentric ring-shaped layout;
For described sample is carried out to cooling cooling unit; And
Control module, described control module is configured to control the rotation of described sample installation unit, so that described a plurality of sample alternately carries out heating and cooling.
2. hot flame stream device according to claim 1, is characterized in that, the aperture of described flame-thrower nozzle is 30 mm ~ 50 mm.
3. hot flame according to claim 1 and 2 flows device, it is characterized in that, described heating unit comprises for supplying with the fuel gas supply section of combustion gas, the blast tube that connects described fuel gas supply section and described flame-thrower nozzle, and the ignition mechanism of being lighted a fire for the combustion gas in the exit to described flame-thrower nozzle.
4. according to the described hot flame stream of any one in claims 1 to 3 device, it is characterized in that, described sample installation unit comprises that described mounting disc is connected with drive source by gear train for the mounting disc of sample is installed, and to be driven described mounting disc by described drive source, rotates.
5. hot flame stream device according to claim 4, is characterized in that, is provided with the passage that makes the liquid coolant circulation in described mounting disc.
6. according to the described hot flame stream of any one in claim 1 to 5 device, it is characterized in that, described cooling unit comprises the pressurized air supply unit, and with a plurality of compressed-air atomizers that described pressurized air supply unit is connected, each compressed-air atomizer has a plurality of nozzle cores that are the concentric ring-shaped layout.
7. hot flame according to claim 6 flows device, it is characterized in that, described a plurality of compressed-air atomizers comprise and are set to carry out cooling nozzle and be set to carrying out cooling nozzle for the substrate backside to described sample for the coat side to described sample.
8. according to the described hot flame of any one in claim 1 to 7 stream device, it is characterized in that, also comprise the data acquisition unit of the temperature of cycle of rotation number of times for gathering described sample installation unit and described sample.
9. according to the described hot flame stream of any one in claim 1 to 8 device, it is characterized in that, also comprise the Leakage Gas monitoring means of the gas leakage for monitoring described heating unit.
10. according to the described hot flame stream of any one in claim 1 to 9 device, it is characterized in that, also comprise the temperature-humidity monitoring unit of the humiture of the operating room tested for monitoring.
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