CN103487345B - 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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Publication number
CN103487345B
CN103487345B CN201310475477.0A CN201310475477A CN103487345B CN 103487345 B CN103487345 B CN 103487345B CN 201310475477 A CN201310475477 A CN 201310475477A CN 103487345 B CN103487345 B CN 103487345B
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sample
flame
unit
nozzle
heating
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CN103487345A (en
Inventor
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

The hot flame stream device of thermal barrier coating thermal shock resistance is tested for dynamic circulation
Technical field
The present invention relates to thermal barrier coating performance test, in particular it relates to a kind of resist for dynamic circulation test thermal barrier coating The hot flame stream device of thermal shock resistance properties.
Background technology
Raising aero-engine, especially one of important channel of the thermal efficiency of aero gas turbine engine are to improve to be somebody's turn to do The Turbine Inlet Gas Temperature of turbogenerator.As aero-engine develops to the direction of higher thrust-weight ratio, its turbine inlet Fuel gas temperature is also constantly soaring therewith, even if on the premise of using efficient air film cooling technology, high-pressure turbine guide vane Operating temperature have also exceeded the reliable service temperature of the most excellent single crystal super alloy blade of current high-temperature behavior.Therefore, in leaf The surface of piece adopts heat-insulated protective coating(That is thermal barrier coating)Become one of the effective measures for solving this problem.
Thermal barrier coating can substantially reduce the heat that high-temperature fuel gas are transmitted to high-temperature alloy blades matrix, reduce blade surface Temperature, and beneficial to prolongation blade service life.Thermal Barrier Coating Technologies have become one of core technology of aero-engine.The U.S., Thermal Barrier Coating Technologies are classified as cold with high-temperature structural material, high-efficiency blade by the aero-engine propulsion of European Union and China in the works But one of three big key technologies of High Performance Aeroengine high-pressure turbine blade technology that technology is laid equal stress on.As high thrust-weight ratio is navigated Empty reseach of engine process is quickly propelled, to the thermal barrier coating material with excellent properties such as high temperature resistant, heat-insulated and heat shock resistances The demand of material is further urgent.
Wherein, thermal shock resistance is an important performance indexes for 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 in advance by ground repeatedly Face bench test drive is examined to verify.However, the material developed directly carries out bench test drive examination, high cost, cycle length, wind rather Danger is big.Therefore, be obtain heat barrier coat material usage performance preliminary assessment result, it would be highly desirable to carry out bench test drive examination before mould Intend the heat barrier coat material usage behavioral study under actual working conditions.
For the thermal shock resistance of thermal barrier coating is tested, during high-temperature electric resistance furnace static test, coating and high temperature are closed Auri material is in same thermal field environment, differs greatly with the actual military service working condition of thermal barrier coating, using conventional oxygen/acetylene Although flame can carry out high/low temperature circulation impact test, flame stream to material(Flame jet)Radial symmetry gradient is larger, it is impossible to Meet the test request of larger equal constant temperature field scope, sample hot-spot will be inevitably resulted in, caused to coating failure Erroneous judgement, thus can not truly reflect the thermal shock resistance of coating.Therefore, need badly and disclosure satisfy that larger equal constant temperature field scope survey Carry out the thermal shock resistance test of the thermal barrier coating under simulation actual working conditions on the device that examination is required.
At present, the equipment that can carry out material thermal shock resistance dynamic test is mostly made by oneself, has no unified specification and mark Standard, the functional parameter difference of distinct device are also larger, and such test device purposes has particularity, and many performance parameters are refused It is open.The data that can be found at present shows that domestic Ji Jia scientific research institutions have been built with oxygen/coal gas or oxygen/acetylene flame stream as thermal source Test device, coal gas, acetylene combustion gas flame stream heat enthalpy value it is relatively low, heating efficiency is not strong;And, this several unit employings It is that flame flow nozzle is single hole flame-thrower nozzle of the aperture less than 30 mm, the beam spot of flame jet is less, and flame stream radial temperature ladder Degree is larger, so the Validity Test regional diameter of flame stream is less than 30 mm.
The content of the invention
For above-mentioned problem and shortage, the technical problem to be solved is to provide a kind of for dynamic The hot flame stream device of loop test thermal barrier coating thermal shock resistance, can have equal constant temperature field of the smaller radial to thermograde Flame stream, and multiple samples can be made to carry out thermal shock resistance dynamic circulation test parallel.
In order to solve above-mentioned technical problem, the height that thermal barrier coating thermal shock resistance is tested for dynamic circulation of the present invention Warm flame stream device, including:For installing the rotatable sample installation unit of multiple samples;For the coat side to the sample The heating unit for being heated, the heating unit possess at least one fire with the multiple inner cones in concentric ring-shaped arrangement Flame nozzle;For the cooling unit cooled down to the sample;And control unit, described control unit be configured to control institute The rotation of sample installation unit is stated, so that the plurality of sample is alternately carried out heating and cools down.
According to the present invention, be formed as, with the multiple inner cones in concentric ring-shaped arrangement, to make by making flame-thrower nozzle The flame stream of generation is laminar state, and to obtain, radial symmetry gradient is little, the flame jet that thermal field is more permanent, so as to can be effectively Dynamic circulation test is carried out to thermal barrier coating thermal shock resistance.Also, by arranging the rotatable sample for installing multiple samples Installation unit, and the rotation of the sample installation unit is controlled by control unit, such that it is able to make the plurality of sample alternately Heated and cooled down.Thereby, it is possible to effectively make multiple samples concurrently carry out automatically thermal shock resistance dynamic circulation survey Examination.
Specifically, the present invention makes the flame-thrower nozzle of heating unit at least a portion in multiple samples by control unit After the coat side of sample carries out bright eruption heating, by rotate sample installation unit, make cooling unit to after heating this at least one The coat side of aliquot is cooled down, and while cooling to multiple samples in the coat side of remaining sample spray Flame is heated.So as to the present invention can be conducive to being simulated aero engine turbine blades heat barrier coat material military service operating mode Under the conditions of coating material sample thermal shock resistance automatic cycle testing.
Also, can also be in the present invention, the aperture of the flame-thrower nozzle be 30 mm~50 mm.
According to the present invention, using the large aperture flame-thrower nozzle of 30 mm~50 mm of diameter, produced can the flame-thrower nozzle The beam spot of raw flame stream is larger, is conducive to the thermal shock resistance to thermal barrier coating to carry out more effective dynamic circulation test.
Also, can also be in the present invention, the heating unit be included for supplying the fuel gas supply portion of combustion gas, connects institute State the blast tube in fuel gas supply portion and the flame-thrower nozzle, and carry out for the combustion gas in the exit to the flame-thrower nozzle The ignition mechanism of igniting.
According to the present invention, the combustion gas Jing blast tubes supplied by fuel gas supply portion to reaching flame-thrower nozzle, and by igniting Combustion gas of the mechanism to the exit of flame-thrower nozzle is lighted a fire, to produce flame stream from the exit of the flame-thrower nozzle, so as to can be right The coat side of sample carries out bright eruption heating.
Preferably, the fuel gas supply portion may include propane source of the gas and oxygen source, and which is each through filtration, Flow-rate adjustment And/or pressure adjust etc. after mixed, and then supplied to each flame-thrower nozzle by blast tube.Using propane, can have remote Higher than the heat enthalpy value of coal gas, natural gas and acetylene etc., flame stream heating efficiency is strong.
Also, can also be in the present invention, the sample installation unit be included for installing the mounting disc of sample, the peace Sabot is connected with driving source by drive mechanism, to drive the mounting disc to rotate by the driving source.
According to the present invention, rotated by driving source drive installation disk, such that it is able to be effectively realized above-mentioned multiple samples The alternating heating of coat side and cooling.
Also, can also be that the passage for making coolant circulate is provided with the mounting disc in the present invention.
According to the present invention, by arranging the passage for making coolant circulate in mounting disc, can reduce in test process The temperature of mounting disc, prevents which overheated, can make which that reliable intensity is kept in test process again.
Also, can also be in the present invention, the cooling unit includes compressed air supply unit, supplies with the compressed air To multiple compressed-air atomizers that portion is connected, each compressed-air atomizer has the multiple nozzle cores in concentric ring-shaped arrangement.
According to the present invention, be formed as with the multiple nozzles in concentric ring-shaped arrangement by making the compressed-air atomizer Core, can make the cooling gas blown on sample more collect neutralization uniform, it is to avoid the gas diffusion problem that single-hole nozzle purging is caused, So that it is guaranteed that preferable cooling effect.
Also, can also be in the present invention, the plurality of compressed-air atomizer includes being provided for the sample Nozzle and be provided for the nozzle cooled down to the substrate backside of the sample that coat side is cooled down.
According to the present invention, the nozzle cooled down by the coat side being provided for sample simultaneously combines sample installation list The rotation of unit, can be effectively realized being alternately cooled for the coat side to multiple samples, i.e., at least a portion sample after heating Coat side cooled down.In addition, can be to institute by being provided for the nozzle cooled down to the substrate backside of the sample The substrate backside for having sample is continued for being compressed air cooling.Thus, can more preferably simulation and aero-turbine leaf The more similar military service operating mode of piece thermal barrier coating.
Also, can also be in the present invention also include for gather the sample installation unit cycle of rotation number of times and The data acquisition unit of the temperature of the sample.
According to the present invention, can be to the cycle of rotation number of times of sample installation unit and the temperature of sample by the data acquisition unit Degree carries out auto-real-time monitoring, collection and stores.
Preferably, the data acquisition unit is may include for gathering the infrared pyrometer group of the temperature of the coat side of sample Part, and for gathering the thermocouple assembly of the temperature of the substrate backside of sample.So as to the temperature to sample can be effectively realized (Including the temperature of the temperature and substrate backside of coat side)Auto-real-time monitoring, collection and store.In addition, the data acquisition list Unit is may include for gathering the counter assembly of the cycle of rotation number of times of sample installation unit.So as to be effectively realized to sample The auto-real-time monitoring of the cycle of rotation number of times of installation unit, collection and store.
Also, can also be also to include leaking for the gas for monitoring the gas leakage of the heating unit in the present invention Monitoring means.
According to the present invention, by arranging the gas leakage monitoring unit, can be timely in the gas leakage of heating unit Report to the police, so as to ensure the safe operation of test device and the personal safety of operator.
Also, can also be also to include the humiture of the humiture for the operating room for being tested in the present invention Monitoring means.
According to the present invention, by arranging the temperature-humidity monitoring unit, the humiture reality of operating room that can be to being tested When monitor, so as to ensure the safe operation of test device and the personal safety of operator.
According to following specific embodiments refer to the attached drawing, the above-mentioned and other objects, features and advantages of the present invention will more Plus it is clear.
Description of the drawings
Fig. 1 is an enforcement shape of the hot flame stream device of the dynamic circulation test thermal barrier coating thermal shock resistance of the present invention The structural representation of state;
Fig. 2 is that raw and air cooling structure the plane of flame miscarriage of an embodiment of hot flame stream device of the invention is shown It is intended to;
Fig. 3 is the schematic cross-section of the flame jet nozzle of an embodiment of hot flame stream device of the invention;
Fig. 4 is the schematic cross-section of the compressed-air atomizer of an embodiment of hot flame stream device of the invention.
Specific embodiment
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
The hot flame stream device of the dynamic circulation test thermal barrier coating thermal shock resistance of the present invention is suitable for sending out in aviation In motivation field, the thermal shock resistance as an important performance indexes for weighing thermal barrier coating usage performance is surveyed Examination.Fig. 1 is an embodiment of the hot flame stream device of the dynamic circulation test thermal barrier coating thermal shock resistance of the present invention Structural representation.And Fig. 3 is the flame jet nozzle of an embodiment of hot flame stream device of the invention(Hereinafter referred to as Flame-thrower nozzle)Schematic cross-section.
The hot flame stream device that thermal barrier coating thermal shock resistance is tested for dynamic circulation of the present invention, including for pacifying Fill the rotatable sample installation unit of multiple samples;For the heating unit heated to the coat side of sample;For right The cooling unit cooled down by sample;And the control unit is controlled by the operation of above-mentioned each unit, the control unit matches somebody with somebody The rotation of Control Assay installation unit is set to so that multiple samples are alternately carried out heating and cool down.Wherein, using the present invention's The sample tested by hot flame stream device can for example be that, with high temperature alloy disk as base material, and base material front adopts thermal spraying Or ceramic heat-barrier coating prepared by gas-phase deposition.
More specifically, in the present invention, by control unit make the flame-thrower nozzle of heating unit in multiple samples extremely After the coat side of few a part of sample carries out bright eruption heating, by rotating sample installation unit, after making cooling unit to heating The coat side of at least a portion sample is cooled down, and cooling while to multiple samples in remaining sample coating Face carries out bright eruption heating.Thereby, it is possible to effectively make multiple samples carry out the dynamic circulation test of thermal shock resistance parallel.From And, the present invention can be conducive to the painting in the case where aero engine turbine blades heat barrier coat material military service working condition is simulated The automatic cycle testing of layer material sample thermal shock resistance.
In the present invention, above-mentioned heating unit possesses at least one and has in concentric ring-shaped arrangement(Referring in particular to Fig. 3) Multiple inner cones 38 flame-thrower nozzle 9.In the embodiment shown in fig. 1, four flame-thrower nozzles 9 are for example set to.By making fire Flame nozzle 9 is formed as with the multiple inner cones 38 in concentric ring-shaped arrangement, and the flame stream that the flame-thrower nozzle 9 is produced can be made to be in layer Stream mode, to obtain, radial symmetry gradient is little, the flame jet that thermal field is more permanent, so as to can effectively to thermal barrier coating heat resistanceheat resistant Impact property carries out dynamic circulation test.Preferably, the flame-thrower nozzle 9 can be copper.
Additionally, the aperture of the flame-thrower nozzle can be 30 mm~50 mm.Using the wide-aperture fire of 30 mm~50 mm Flame nozzle 9, can make the beam spot of the flame stream produced by flame-thrower nozzle 9 larger.Be conducive to thermal barrier coating thermal shock resistance Carry out dynamic circulation test.For example, as shown in figure 3, in the present embodiment, the aperture of the flame-thrower nozzle 9 is 50 mm.In the hole Under the setting in footpath, and with reference to the inner cone structure of above-mentioned flame-thrower nozzle 9, shown according to temperature measurement result, in the flame of 50 mm of diameter In the range of a fluid stream speckle, flame stream radial symmetry gradient(△T/△L)50 DEG C/cm of <, are capable of achieving effective survey of 50 mm samples of diameter Examination.
In addition, said sample installation unit can include that mounting disc is by transmission for installing the mounting disc of multiple samples Mechanism is connected with driving source, to be rotated by the driving source drive installation disk.So as to the painting of above-mentioned multiple samples can be effectively realized The alternating heating of aspect and cooling.In the embodiment shown in Fig. 1, the mounting disc is arranged to eight station mechanical rotating mechanisms Rotatable mounting disc 5, which can install eight samples simultaneously.Eight samples can be clamped in into this respectively for example, by fixture etc. On eight sample holder stations 8 of mounting disc 5 such that it is able to carry out the parallel dynamic circulation test of eight samples.
And, it is preferable that the mounting disc 5 can be made of stainless steel, so as to its intensity is high and corrosion resistance is strong.Implement one In example, a diameter of 900 mm of the mounting disc 5, disk 30 mm of thickness, the position of eight stations clamping sample are the circles in mounting disc 5 In the eight equal parts angle in week(45°).The mounting disc 5 is by power transmission shaft 37 and 3 phase of such as DC servo motor as driving source Even.Rotated by 37 drive installation disk 5 of power transmission shaft by the DC servo motor 3.Support DC servo motor 3 and power transmission shaft 37 Support 4 is both secured on operating board 1.
Additionally, the sample installation unit can further include electricity loss brake, dead electricity clutch and lead modeling potentiometer Deng component(Diagram is omitted).The DC servo motor 3 for being preferably equipped with decelerator is connected with mounting disc 5 by power transmission shaft 37, Jing is arranged on leading on power transmission shaft 37 and moulds potentiometric real―time precision measurment, makes mounting disc 5 realize accurate rotational angle.And pacify The electricity loss brake being mounted on power transmission shaft 37 is a controllable uncoupling mechanism, and when upper electric, damping is zero, does not hinder 5 turns of mounting disc Dynamic, during dead electricity, damping is very big, serious to hinder mounting disc 5 to rotate, electricity loss brake and dead electricity clutch co-ordination, is capable of achieving peace The functions such as the release of sabot 5, startup, braking, locking.
Furthermore it is also possible to the passage for making coolant circulate is provided with mounting disc 5(Diagram is omitted).By in mounting disc 5 Interior setting makes the passage that coolant circulates, and can reduce the temperature of mounting disc 5, prevent which overheated, can make again in test process Which keeps reliable intensity in test process.
Also, in the present invention, above-mentioned heating unit can be included for supplying the fuel gas supply portion 15 of combustion gas, connect combustion gas The blast tube 12 of supply unit 15 and flame-thrower nozzle 9, and the point for being lighted a fire to the combustion gas in the exit of flame-thrower nozzle 9 Lighter structure(Diagram is omitted).The combustion gas Jing blast tubes 12 supplied by fuel gas supply portion 15 are to reaching flame-thrower nozzle 9, and pass through point Combustion gas of the lighter structure to the exit of flame-thrower nozzle 9 is lighted a fire, to produce flame stream from the exit of the flame-thrower nozzle 9, so as to Bright eruption heating can be carried out to the coat side of sample.
More specifically, the ignition mechanism can be automatic ignition mechanism, including automatic ignitor and ultraviolet, infrared signal are passed Sensor.Wherein, gas is lighted a fire and adopts high voltage pulse sparking mode, ultraviolet, infrared signal sensor real-time monitoring flame status, and Signal is fed back to into automatic ignitor, therefore the function of being lighted a fire again automatically after being capable of achieving flame accident extinguishing immediately.
Preferably, the gentle cold junction of flame miscarriage life of an embodiment of the hot flame stream device of the present invention as shown in Figure 2 The floor map of structure, the fuel gas supply portion 15 of the present invention may include propane source of the gas 19 and oxygen source 25, and which each passed through Mixed after filter, Flow-rate adjustment and/or pressure regulation etc., and then supplied to each flame-thrower nozzle 9 by above-mentioned blast tube 12. Using propane, there can be the heat enthalpy value far above gases such as coal gas, natural 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, the air relief valve of the respective gas circuits of Jing, filter 20,26, Electromagnetic valve 21,27, gas mass flow controller 22,28, gas pressure sensor 23,29, after gas bag 24,30, are divided into four Road, is respectively fed to each flame-thrower nozzle 9 with corresponding oxygen all the way per propane all the way Jing after the mixing of gas mixer 14, and Flame jet is produced in the exit igniting of flame-thrower nozzle 9.So as in this embodiment, total to spray from four flame-thrower nozzles 9 The four road flame streams for projecting, that is, clamp the mounting disc 5 of sample just facing to four road flame streams.Additionally, above-mentioned fuel gas supply portion 15 with Flash-back arrestor 13 is also provided with blast tube 12 between flame-thrower nozzle 9.
Also, referring also to Fig. 1 and Fig. 2, in the present invention, above-mentioned cooling unit adopts air cooling structure, and which includes compressed air Supply unit 16, the multiple compressed-air atomizers 6,10 being connected with the compressed air supply unit 16,6,10 points of each compressed-air atomizer Ju You not be in multiple nozzle cores 39 of concentric ring-shaped arrangement.Have in concentric by being formed as the compressed-air atomizer 6,10 Multiple nozzle cores 39 of circular arrangement, can make the cooling gas blown on sample more collect neutralization uniform, it is to avoid single-hole nozzle The gas diffusion problem that purging is caused, so that it is guaranteed that preferably cooling effect.
Specifically, multiple compressed-air atomizers of the cooling unit include being provided for the coat side to sample carry out it is cold But nozzle 10 and the nozzle 6 for being provided for cooling down the substrate backside of sample.In the embodiment shown in Fig. 1 In, the nozzle 10 for being cooled down to the coat side of sample is set to four, corresponding with the quantity of flame-thrower nozzle 9, so as to Correspondingly the coat side of the sample after heating can be cooled down, be effectively realized the friendship of the coat side to multiple samples For cooling.And the nozzle 6 for being used to cool down the substrate backside of sample is set to eight, the eight of mounting disc 5 are corresponded respectively to Individual station 8, so as to be continued for being compressed air cooling to the substrate backside of all samples.According to the structure, can be more preferable The simulation military service operating mode more similar to aero engine turbine blades thermal barrier coating.
More specifically, see figures.1.and.2, after the compressed air supply unit 16 may include air compressor and storage compression Air compressed air reservoir 31.Compressed air Jing air relief valve, filter 32, electromagnetic valve in the compressed air reservoir 31 33rd, after gas mass flow controller 34, gas pressure sensor 35, gas bag 36,12 road gas pipelines are divided into, are connected respectively To multiple compressed-air atomizers 6,10.The eight road gases wherein against 5 back side of mounting disc are used for the high-temperature alloy base of cooling samples The material back side, remaining is used for the coat side of cooling samples against 5 positive four road gas of mounting disc.
Additionally, the hot flame stream device for testing thermal barrier coating thermal shock resistance for dynamic circulation of the present invention can be with Including for gathering the data acquisition unit of the temperature of the cycle of rotation number of times and sample of said sample installation unit.By the number Auto-real-time monitoring can be carried out to the temperature of the cycle of rotation number of times of sample installation unit and sample according to collecting unit, gather and deposit Storage.
Preferably, the data acquisition unit includes for gathering the infrared pyrometer component of the temperature of the coat side of sample, And for gathering the thermocouple assembly of the temperature of the substrate backside of sample.So as to the temperature to sample can be effectively realized(Bag Include the temperature of the temperature and substrate backside of coat side)Auto-real-time monitoring, collection and store.In addition, the data acquisition unit Including for gathering the counter assembly of the cycle of rotation number of times of sample installation unit.Sample is installed so as to be effectively realized The auto-real-time monitoring of the cycle of rotation number of times of unit, collection and store.
As shown in figure 1, the Coated Surface Temperature of sample is gathered by two-color infrared pyrometer component 17 in test process, four Four coat side temperature in the sample of flame heated condition during infrared pyrometer difference collecting test, support infrared height The pole 18 of temperature meter is fixed on operating board 1.
Also, the hot flame stream device for testing thermal barrier coating thermal shock resistance for dynamic circulation of the present invention can also be wrapped Include for monitoring the gas leakage monitoring unit of the gas leakage of above-mentioned heating unit.By arranging the gas leakage monitoring list Unit, can be in the gas leakage of heating unit and alarm, so as to ensure personal safety and the test device of operator Safe operation.
Specifically, in this embodiment, although not shown, but the above-mentioned gas leakage monitoring unit includes that propane is let out Leakage detector assembly and oxygen leakage detector assembly.If propane leak amount reaches the lower limit of setting, triggering is joined therewith Dynamic sound and light alarm;Equally, if oxygen leakage amount makes oxygen content reach the higher limit of setting, also triggering is linked therewith Sound and light alarm.
Also, the test of the thermal barrier coating thermal shock resistance of the present invention, is generally carried out in work interior.Therefore, the present invention For dynamic circulation test thermal barrier coating thermal shock resistance hot flame stream device can also include for being surveyed The temperature-humidity monitoring unit of the humiture of the operating room of examination.By arranging the temperature-humidity monitoring unit, can be to being tested The humiture real-time monitoring of operating room, so as to ensure the safe operation of test device and the personal safety of operator.
Specifically, in this embodiment, although not shown, but above-mentioned temperature-humidity monitoring unit includes that humiture is detected Device assembly.When the indoor humiture of work reaches the higher limit of setting, the sound and light alarm that triggering is linked therewith.
The present invention can pass through control unit(Diagram is omitted)Control the operation of above-mentioned each part, the control unit is included but not It is limited to electric power system control module, gas flow control module, automatic ignition control module, the control of eight station mechanical rotating mechanisms Module, gas leakage and operating room's temperature-humidity monitoring control module and controlling interface etc., each control module can integrate in Communication interface between control unit, and the control unit and above-mentioned each part for example can be asynchronous logical using RS422 standard serials Communication interface.
Additionally, also as shown in figure 1, being also equipped with above operating room residing for the hot flame stream device of this embodiment Draught hood 2, in test process, convulsion is opened in real time, extracts waste gas in time out, it is ensured that safety.
Using the hot flame stream device that thermal barrier coating thermal shock resistance is tested for dynamic circulation of this embodiment, can Carry out following test:
The flame stream of the hot flame stream device can pass through to regulate and control the flow of propane and oxygen to the heating-up temperature of sample(Than)Come Realize, testing experiment shows, the hot flame stream device is to the continuous heating temperature of ceramic heat-barrier coating specimen surface up to 1800 DEG C, it is fully able to meet test temperature requirement at present to high-temp heat barrier coating.The beginning of test process, run, suspend and stop Only function, is capable of achieving automatic running, before test starts, pre-set gas(Propane, oxygen and compressed air)It is flow, every After the parameter such as the heating of individual circulation and cool time, cycle-index, only need to be tested and automatically begun to by " beginning " on touch screen Operation.
The air relief valve of propane, the oxygen difference respective gas circuits of Jing, filter 20,26, electromagnetic valve 21,27, gas mass flow Controller 22,28, gas pressure sensor 23,29 are divided into four tunnels after gas bag 24,30, per propane all the way with corresponding one Road oxygen Jing gas mixer 14 mixes, and the igniting in 9 exit of flame-thrower nozzle produces flame jet, has four road flame streams, that is, presss from both sides The mounting disc 5 of sample is held just facing to four road flame streams.Test sample holder before starting on the position of the station 8 of mounting disc 5. Hot flame stream device in this embodiment can carry out the cardiopulmonary bypass in beating heart test of eight thermal barrier coating samples, four road flame streams one a pair After answering the coat side certain hour of ground heating wherein four samples, the mounting disc 5 for clamping sample turns clockwise 45 °, four road flames Stream heats the coat side same time of other four sample again correspondingly, meanwhile, front four samples during this period of time coating Face is compressed air cooling, and afterwards, disc counter-clockwise rotates 45 °, such alternate repetition.
The coat side of sample is heated and pressure-air cooling through a flame stream, is a heat shock cycling(Equivalent to peace Sabot 5 rotates 45 °).In test process, the high temperature alloy base material back side of eight samples is continued for being compressed air cooling. In the design of air cooling mechanism, the front and back of mounting disc 5 is respectively toward to four roads and eight tunnel compressed air gas circuits.Described above Sample loop test process, is the simulation military service operating mode more similar to aero engine turbine blades thermal barrier coating.
In test process, the coat side temperature and high temperature alloy base material back temperature of sample is respectively by infrared pyrometer component 17 and thermocouple assembly measurement, collection and store, and loop test number of times(That is 5 cycle of rotation number of times of mounting disc)Can be single by control The counter assembly of unit is counted, gathered and is stored.
After the test of certain cycle-index, coat side starts cracking, peels off sample, reaches painting to area is peeled off During the layer gross area about 5%, coating sample failure is judged, test stops.In identical test temperature, between cooling condition, circulation time Every etc. under test condition, sample starts more to the cycle-index for judging to experience during failure from test, shows the circulation of sample Thermal shock life is longer, i.e., the thermal shock resistance of coating sample is better.
Under the objective of the basic feature without departing from the present invention, during the present invention can be presented as various ways, therefore the present invention Embodiment be to be illustrative rather than definitive thereof, as the scope of the present invention is defined by the claims rather than is limited by description, And all changes fallen in the scope defined in claim, or the full scope of equivalents of its scope for defining are understood to include In detail in the claims.

Claims (6)

1. it is a kind of for dynamic circulation test thermal barrier coating thermal shock resistance hot flame stream device, it is characterised in that include:
For installing the rotatable sample installation unit of multiple samples;
For the heating unit heated to the coat side of the sample, the heating unit possesses at least one and has in same The flame-thrower nozzle of multiple triangle inner cones of the circular arrangement of the heart;
For the cooling unit cooled down to the sample, the cooling unit includes compressed air supply unit, with the pressure Multiple compressed-air atomizers that contracting air supply unit is connected, the plurality of compressed-air atomizer include being provided for the examination The coat side of sample is cooled down and the front nozzle corresponding with the quantity of the flame-thrower nozzle and is provided for all examinations The back side nozzle persistently cooled down by the substrate backside of sample;And
Control unit, described control unit are configured to pass the flame-thrower nozzle and at least a portion in the plurality of sample are tried After the coat side of sample carries out bright eruption heating, the rotation of the sample installation unit is controlled, after making the front nozzle to heating The coat side of at least a portion sample is cooled down, and cooling while by the flame-thrower nozzle to do not heat other The coat side of sample carries out bright eruption heating, so that the coat side of the plurality of sample is alternately carried out heating and cools down.
2. hot flame stream device according to claim 1, it is characterised in that the aperture of the flame-thrower nozzle is 30 mm ~ 50 mm。
3. hot flame stream device according to claim 1, it is characterised in that the heating unit is included for supplying combustion gas Fuel gas supply portion, connect the blast tube of the fuel gas supply portion and the flame-thrower nozzle, and for spraying to the flame The automatic ignition mechanism lighted a fire by the combustion gas in the exit of mouth.
4. hot flame stream device according to claim 1, it is characterised in that the sample installation unit is included for installing The mounting disc of sample, the mounting disc are connected with driving source by drive mechanism, to drive the mounting disc by the driving source Rotate.
5. hot flame stream device according to claim 4, it is characterised in that being provided with the mounting disc makes coolant stream Logical passage.
6. hot flame stream device according to any one of claim 1 to 5, it is characterised in that each compressed-air atomizer tool There are the multiple nozzle cores in concentric ring-shaped arrangement.
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