CN108531843A - A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying - Google Patents
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying Download PDFInfo
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- CN108531843A CN108531843A CN201711452835.0A CN201711452835A CN108531843A CN 108531843 A CN108531843 A CN 108531843A CN 201711452835 A CN201711452835 A CN 201711452835A CN 108531843 A CN108531843 A CN 108531843A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
Abstract
The invention belongs to aeronautic measurement technical fields, and in particular to a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying is a kind of novel thermocouple structure form.The present invention to aero engine turbine blades by carrying out surface preparation；Followed by flame-spraying by high-temperature insulation material Al2O3It is ejected on turbo blade matrix after ceramic rod melting, completes insulating layer and prepare；Then it utilizes flame spraying process to spray the positive and negative anodes of thermocouple functional layer respectively, makes to form firm metallurgical binding between coating and insulating body, complete functional layer and prepare；High-temperature insulation material Al is finally utilized again2O3Ceramic rod prepares protective layer.The present invention is based on bar flame spray techniques directly to prepare thermocouple sensor in turbine blade surface, can accurately measure the surface temperature with monitoring turbine rotor blade in real time.
Description
Technical field
The invention belongs to aeronautic measurement technical fields, and in particular to a kind of thick film thermocouple biography based on bar flame-spraying
Sensor manufacturing method.
Background technology
Turbine is one of three big critical component of aero-engine.In order to improve thrust-weight ratio, an important technology approach is to carry
High turbine inlet temperature.Usual combustor exit fuel gas temperature is unevenly distributed, and shows as the combustion gas stream with high temperature core, this will
The heterogeneity of temperature at turbine inlet is caused to further enhance.The turbine rotor blade of huge thermic load is subject also red-hot
The rotation of high-temperature high-pressure fuel gas stream high speed, very big thermal gradient will make turbo blade be subjected to serious thermal stress and strain,
The creep life of turbo blade will significantly decline.Therefore, in order to improve the trouble free service reliability of blade, extend its longevity
Life, just must accurately measure and monitor, research and analyse in real time the Temperature Distribution of turbo blade, so as to blade design, material,
Cooling, technique, is installed and is taken effective measures structure, the rational Temperature Distribution of active control.
English ﹑ U.S.s ﹑ E Deng aeronautical technologies developed country has put into a large amount of manpower and materials research and development and has been surveyed for turbine part temperature
The sensor and equipment and instrument of examination, it is most common mainly to have armoured thermocouple, infrared sensor, crystal probe and temperature indicating paint
Deng mostly for turbine static blade.
China's development aero engine turbine blades Testing Technology Study is later, and input is limited, and measuring technology level is relatively low,
The sensor and equipment and instrument for turbine part temperature test of independent research are less.The infrared measurement of temperature introduced from foreign countries is set
It is standby, since infrared sensor itself is difficult to bear high environment temperature, need to cool down, cooling air-flow can failure test part flow field and
Thermo parameters method；Infrared measurement of temperature is affected by emissivity, and it is big that there are measurement errors, and temperature resolution and spatial resolution are low etc.
Problem.And armoured thermocouple thermometry, it is a kind of immersion measurement method, however this method destroys blade construction, blade
Heat transfer property changes, and reduces measurement accuracy, and can not bury armour in the relatively thin thin-wall construction of blade trailing edge equal thickness
Dress thermocouple measures；Crystal thermometric is not necessarily to test lead with temperature indicating paint thermometry, but can only obtain trystate most
High-temperature cannot be monitored and measure during the test.For the urgent demand of high-pressure turbine working blade temperature test
And the limitation of state of the art, urgent need seek a kind of high certainty of measurement, to testpieces without destruction, on experiment process without influence
Measuring technology, which need to have the features such as monitoring and ensureing the reliably working under bad working environments in real time simultaneously, and satisfaction is started
The development demand of machine.
Invention content
The purpose of the present invention：It is difficult in order to solve turbo blade thermometric, turbine blade arrangement is destroyed greatly, cannot accurately be surveyed
Amount and real-time monitoring problem.The present invention directly prepares thick film thermocouple in turbine blade surface using bar flame spray technique,
To turbo blade without destruction, on experiment process without influence, thick film thermocouple coating is thin, and attachment is firm, can efficiently accomplish high temperature, height
The accurate measurement and monitoring in real time of turbine blade surface temperature under pressure and high rotating speed environment.
Technical scheme of the present invention：
In order to solve the above technical problem, the present invention provides a kind of thick film thermocouple sensors based on bar flame-spraying
Manufacturing method first pre-processes turbine blade surface, removes the various foreign matters of blade surface, provides and be suitable for coating specification
Good substrate；Using bar flame-spraying Al2O3Ceramic rod completes the preparation of insulating coating, thereafter, using bar flame-spraying point
Not Pen Tu thermocouple functional layer positive and negative anodes, finally again use bar flame-spraying Al2O3Ceramic rod completes the guarantor to functional layer
Shield.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, includes the following steps：
Step 1：Surface preparation；
Step 2：It is prepared by insulating layer
After position to being not required to spray applied insulation is protected with high-temperature insulation adhesive tape, Al is sprayed using bar flame gun2O3Pottery
Porcelain stick, nozzle form insulating layer perpendicular to turbine blade surface；
Step 3：It is prepared by functional layer
Positive mask plate is fitted closely with blade surface first with high temperature gummed tape, it is fixed；Followed by flame
Spraying process sprays thermocouple anode bar, makes to form firm metallurgical junction between thermocouple anode bar coating and insulating body
It closes；Thereafter, positive mask plate is removed, cathode mask plate is fitted closely with blade surface, it is fixed；Finally flame is utilized to spray
It applies technique and sprays thermocouple cathode bar, make to form firm metallurgical junction between thermocouple cathode bar coating and insulating body
It closes；Functional layer is completed to prepare；
Step 4：It is prepared by protective layer
Cathode mask plate is removed first, and functional layer positive and negative electrode lead end is protected using the high temperature gummed tape.
Thereafter to thick film thermocouple flame-spraying Al again2O3Ceramic rod makes thick film thermocouple all by ceramic coating covering protection；
Step 5：Test lead is drawn
Technique is connect according to corresponding positive and negative anodes completion and thick film thermocouple by parallel micro gap welding first with thermocouple naked silk
Lead end connects；Then, flame-spraying Al is used again to the lead end for completing welding2O3Protection is fixed in ceramic rod；Its
Afterwards, the naked silk of thermocouple is completed by laser welding technology to connect with rear end high-temperature compensating lead；Finally, the high temperature compensation is led
Line accesses slip ring electrical feedthrough by lead axis or telemetry system carries out signal transmission.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, the step 1 are specifically wrapped
It includes：
Turbo blade tongue-and-groove is protected with high temperature gummed tape first, carries out sandblasting to thick film thermocouple position is preliminarily sprayed thereafter；
After the completion of blasting treatment, with rifle is blown off to turbo blade cleaning treatment, residual sand grains is blown off；Using absolute ethyl alcohol to turbo blade
Surface is cleaned by ultrasonic；Finally heat gun is used to dry up strip.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, thermoelectricity in the step 3
Even anode bar PtRh10Alloy bar material, PtRh13Alloy bar material, PtRh30Alloy bar material, Ni90Cr10One in alloy bar material
Kind；Thermocouple cathode bar includes Pt alloy bar materials, PtRh6Alloy bar material, Ni97Si3One kind in alloy bar material.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, turbo blade in step 1
Surface sand-blasting process, sand grains are Brown Alundum, the mesh of about 20 mesh of fineness of sand~30, blasting pressure 0.6MPa.Using absolute ethyl alcohol into
The row ultrasonic cleaning time is no less than 10min.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, flame described in step 2
Spray applied insulation is by Al2O3Ceramic rod is ejected into turbine blade surface, spray pressure about 0.55MPa, nozzle after being melted with flame
Perpendicular to turbine blade surface and distance about 100mm, insulating layer, about 30 μm~50 μm of coating layer thickness are formed.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, flame described in step 3
Spraying function layer is to be ejected into surface of insulating layer after melting thermocouple positive and negative anodes bar with flame respectively, and spray pressure is
0.65MPa~0.75MPa, nozzle form functional layer, thermocouple positive and negative anodes perpendicular to turbine blade surface and distance about 100mm
Width is 1mm~2mm, and coating layer thickness is 50 μm~80 μm.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, is protected described in step 4
Layer thickness is 30 μm~50 μm.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, thermoelectricity described in step 5
Even naked a diameter of 100 μm of silk；The high-temperature compensating lead internal diameter is 2 × 0.25mm, and outer diameter is 0.9mm × 1.5mm, the heatproof upper limit
It is 700 DEG C~800 DEG C.The slip ring electrical feedthrough selects respective channel number, generally 40 channels, 60 to lead to according to practical measuring point quantity
Road and 120 channels.
Beneficial effects of the present invention：The present invention innovatively proposes a kind of thick film thermocouple based on bar flame-spraying
Sensor manufacturing process, the sensor are made of insulating layer, functional layer and protective layer multilayered structure, are a kind of novel thermocouples
Structure type also has its unique advantage other than inheriting the features such as thermocouple measurement precision is high.It is described a kind of based on bar fire
Flame spraying thick film thermocouple sensor have do not destroy turbine blade surface structure, do not interfere attached jet field, can be in thin-walled knot
Measuring point is arranged on structure, can have been filled up under high centrifugal load, high heating power load the ceramic heat-barrier coating surface layout measuring point the advantages that
The blank that Turbine Blade Temperature Field is monitored and accurately measured in real time has significant military, economic and social benefit.
Description of the drawings
Fig. 1 is a kind of thick film thermocouple sensor schematic based on bar flame-spraying of the present invention.
Specific implementation mode
Below by specific implementation mode, the present invention is described in further detail：
The present invention is a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, first to turbo blade
Surface is pre-processed, and is removed the various foreign matters of blade surface, is provided the good substrate for being suitable for coating specification.Then, using stick
Material flame spraying process sprays Al2O3The preparation that ceramic rod completes insulating layer is sprayed using bar flame-spraying thereafter respectively again
The positive and negative anodes of thermocouple functional layer are applied, finally spraying high temperature insulating materials Al again2O3Ceramic rod prepares protective layer to temp sensing function
Layer is protected.
A kind of thick film thermocouple sensor based on bar flame-spraying, including turbine blade surface pretreatment,
Prepared by insulating layer, prepared by functional layer, and prepared by protective layer, test lead is drawn.
Turbine blade surface pre-processes
Surface treatment be artificially formed on substrate material surface one layer it is different from the machinery of matrix, physical and chemical properties
Surface layer process.The purpose of surface treatment is in order to various foreign matters (such as oxide skin, dirt accompanying by body surface
Dirt, grease, corrosion etc.) removal, the good substrate for being suitable for coating specification is provided, to ensure that film has good temperature tolerance
Energy, Corrosion Protection, decoration performance and certain features.Body surface must be pre-processed before application.Matrix
The purpose of surface preparation：First, making matrix surface purify and having certain roughness, second is that increasing the combination of coating and matrix
Intensity both increases adhesive force, third, increasing the function such as heatproof, anticorrosion of coating and the specific functions such as anti-wear.
Since test object turbo blade works under " high temperature, high pressure, high rotating speed " bad working environments, thick film thermocouple sensing
Device, which installs fixed reliability, becomes the key factor for influencing test success or failure.The effective reliably working of thick film thermocouple in test
Necessarily require coating adhesion property good, without the risk presence that falls off.And the excellent premise of coating adhesion property is to ensure that test specimen
Surface treatment rationally, effectively, is conducive to the features such as coating spraying is installed.
The turbine blade surface pretreatment is divided into blasting treatment and surface clean two parts.
Blasting treatment
Turbo blade is unable to sandblasting position tongue-and-groove masking tape first or mechanical masking methods are protected, is pre-installed
Thick film thermocouple surface carries out blasting treatment with sand-blasting machine, and sand grains uses the alumina grits of 18~24 mesh, blasting pressure 0.4
~0.5MPa, angle of gun should be moved with constant speed in surface of test piece, nozzle is away from examination as far as possible perpendicular to sand blasted surface is waited for
Part distance is about 45mm, and blast time is about 10 seconds.
Surface clean
After the completion of blasting treatment, the turbine blade surface Relict Sand after blasting treatment is blown off with the dry compressed air of cleaning
Grain, reuses absolute ethyl alcohol, the no less than ultrasonic cleaning of 10min is carried out to turbine blade surface.Finally use heat gun or electricity
Blowing drying strip.
It is prepared by insulating layer
After sandblasting and cleaning, to prevent surface of test piece oxidation from influencing anchoring strength of coating, applied in 60min planted agent's spray insulation
Layer.After being not required to the Teflon high temperature gummed tape protection of 260 DEG C of the heatproof in the position of spray applied insulation, first surface of test piece is carried out pre-
Heat treatment, it is inswept several all over highest preheating temperature is in surface of test piece using ROKIDE sprayings flame (being free of insulating materials)
150℃.Then by Al2O3Ceramic rod is loaded onto, and it is about 0.55MPa to adjust spray pressure, nozzle perpendicular to turbine blade surface and away from
From about 100mm, by Al2O3It is ejected into turbine blade surface after ceramic rod melting, forms insulating layer, 30 μm~50 μm of coating layer thickness.
It is prepared by functional layer
Positive mask plate is fitted closely with blade surface first with high temperature gummed tape, it is fixed.Followed by flame
Spraying process sprays thermocouple anode bar PtRh10Alloy bar material, PtRh13Alloy bar material, PtRh30Alloy bar material, Ni90Cr10
One kind in alloy bar material makes to form firm metallurgical binding between thermocouple anode coating and insulating body；Thereafter, it removes
Positive mask plate fits closely cathode mask plate with blade surface, fixed.Finally flame spraying process is utilized to spray heat
Galvanic couple cathode bar includes Pt alloy bar materials, PtRh6Alloy bar material, Ni97Si3One kind in alloy bar material keeps thermocouple negative
Firm metallurgical binding is formed between pole coating and insulating body, is completed functional layer and is prepared.Spray pressure be 0.65MPa~
0.75MPa, nozzle are 1mm~2mm perpendicular to turbine blade surface and distance about 100mm, thermocouple positive and negative anodes width, apply thickness
Degree is 50 μm~80 μm.
It is prepared by protective layer
Cathode mask plate is removed first, and functional layer positive and negative electrode lead end is protected using the high temperature gummed tape.
Thereafter to thick film thermocouple flame-spraying Al again2O3Ceramic rod makes thick film thermocouple all by ceramic coating covering protection, protect
Covering thickness is 30 μm~50 μm.
Test lead is drawn
Technique is connect according to corresponding positive and negative anodes completion and thick film thermocouple by parallel micro gap welding first with thermocouple naked silk
Lead end connects, a diameter of 100 μm of the naked silk of thermocouple.Then, flame-spraying is used again to the lead end for completing welding
Al2O3Protection is fixed in ceramic rod.Thereafter, the naked silk of thermocouple and rear end high-temperature compensating lead are completed by laser welding technology
Connection, the high-temperature compensating lead internal diameter are 2 × 0.25mm, and outer diameter is 0.9mm × 1.5mm, and the heatproof upper limit is 700 DEG C~800
℃.Finally, the high-temperature compensating lead is accessed into slip ring electrical feedthrough by lead axis or telemetry system carries out signal transmission, it is described
Slip ring electrical feedthrough selects respective channel number, generally 40 channels, 60 channels and 120 channels according to practical measuring point quantity.
A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying of the present invention is exhausted by high temperature resistant
The research of the edge testing of materials, paintability experimental study, simulation heating experimental study, different insulative coating comparative experimental research, armour
Thermocouple is filled to rush with thick film thermocouple comparative experimental research, the research of thick film thermocouple rating test, thick film thermocouple high-temperature fuel gas
It hits experimental study and the cold effect experimental study of thick film thermocouple etc. and achieves good effect.The present invention can be in high temperature, high pressure and height
The surface temperature that high-pressure turbine working blade is accurately measured and monitored in real time under fast rotating environment, can also be applied to turbo blade
The cold effect experiment of surface heat barrier coating, turbo blade, combustion chamber flame drum, combustion chamber cooling test part, combustion box, turbine
Casket, the turbine disk and other military, civilian high temperature, high speed rotation part, thin-wall part, complex component and armoured thermocouple are not easy installation site
Surface temperature test, have great engineering application value.
Claims (9)
1. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying, it is characterised in that：First to turbo blade
Surface is pre-processed, and is removed the various foreign matters of blade surface, is provided the good substrate for being suitable for coating specification；Using bar flame
Spray Al2O3The preparation that ceramic rod completes insulating coating sprays thermocouple functional layer respectively using bar flame-spraying thereafter
Positive and negative anodes finally use bar flame-spraying Al again2O3Ceramic rod completes the protection to functional layer.
2. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 1, special
Sign is, includes the following steps：
Step 1：Surface preparation；
Step 2：It is prepared by insulating layer
After position to being not required to spray applied insulation is protected with high-temperature insulation adhesive tape, Al is sprayed using bar flame gun2O3Ceramics
Stick, nozzle form insulating layer perpendicular to turbine blade surface；
Step 3：It is prepared by functional layer
Positive mask plate is fitted closely with blade surface first with high temperature gummed tape, it is fixed；Followed by flame-spraying
Technique sprays thermocouple anode bar, makes to form firm metallurgical binding between thermocouple anode bar coating and insulating body；
Thereafter, positive mask plate is removed, cathode mask plate is fitted closely with blade surface, it is fixed；Finally utilize flame-spraying
Technique sprays thermocouple cathode bar, makes to form firm metallurgical binding between thermocouple cathode bar coating and insulating body；
Functional layer is completed to prepare；
Step 4：It is prepared by protective layer
Cathode mask plate is removed first, and functional layer positive and negative electrode lead end is protected using the high temperature gummed tape.Thereafter
To thick film thermocouple flame-spraying Al again2O3Ceramic rod makes thick film thermocouple all by ceramic coating covering protection；
Step 5：Test lead is drawn
Technique is connect first with the naked silk of thermocouple by parallel micro gap welding to complete and thick film thermocouple lead according to corresponding positive and negative anodes
End connection；Then, flame-spraying Al is used again to the lead end for completing welding2O3Protection is fixed in ceramic rod；Thereafter, lead to
The laser welding technology completion naked silk of thermocouple is crossed to connect with rear end high-temperature compensating lead；Finally, the high-temperature compensating lead is led to
It crosses lead axis access slip ring electrical feedthrough or telemetry system carries out signal transmission.
3. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 2, special
Sign is that the step 1 specifically includes：
Turbo blade tongue-and-groove is protected with high temperature gummed tape first, carries out sandblasting to thick film thermocouple position is preliminarily sprayed thereafter；Sandblasting
After the completion of processing, with rifle is blown off to turbo blade cleaning treatment, residual sand grains is blown off；Using absolute ethyl alcohol to turbine blade surface
It is cleaned by ultrasonic；Finally heat gun is used to dry up strip.
4. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 2, special
Sign is that thermocouple anode bar includes PtRh in the step 310Alloy bar material, PtRh13Alloy bar material, PtRh30Alloy bar
Material, Ni90Cr10One kind in alloy bar material；Thermocouple cathode bar includes Pt metal bars, PtRh6Alloy bar material, Ni97Si3
One kind in alloy bar material.
5. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 3, special
Sign is, turbine blade surface blasting treatment in step 1, and sand grains is Brown Alundum, the mesh of about 20 mesh of fineness of sand~30, and blasting pressure is
0.6MPa.Using absolute ethyl alcohol carry out be cleaned by ultrasonic the time be no less than 10min.
6. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 2, special
Sign is that flame-spraying insulating layer described in step 2 is by Al2O3Ceramic rod is ejected into turbine blade surface after being melted with flame,
Spray pressure about 0.55MPa, nozzle form insulating layer, coating layer thickness about 30 perpendicular to turbine blade surface and distance about 100mm
μm~50 μm.
7. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 4, special
Sign is that flame-spraying functional layer described in step 3 is to melt the positive bar of thermocouple and cathode bar with flame respectively
After be ejected into surface of insulating layer, spray pressure is 0.65MPa~0.75MPa, nozzle perpendicular to turbine blade surface and distance about
100mm forms functional layer, and thermocouple positive and negative anodes width is 1mm~2mm, and coating layer thickness is 50 μm~80 μm.
8. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 2, special
Sign is that protective layer thickness described in step 4 is 30 μm~50 μm.
9. a kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying according to claim 2, special
Sign is, a diameter of 100 μm of the naked silk of thermocouple described in step 5；The high-temperature compensating lead internal diameter is 2 × 0.25mm, outer diameter
For 0.9mm × 1.5mm, the heatproof upper limit is 700 DEG C~800 DEG C.The slip ring electrical feedthrough selects corresponding according to practical measuring point quantity
Port number, generally 40 channels, 60 channels and 120 channels.
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| CN201711452835.0A CN108531843A (en) | 2017-12-27 | 2017-12-27 | A kind of thick film thermocouple sensor manufacturing process based on bar flame-spraying |
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| CN110220605A (en) * | 2019-06-28 | 2019-09-10 | 华能国际电力股份有限公司丹东电厂 | A kind of preparation method, measuring system and the measurement method of tube wall temperature measuring system |
| CN110987215A (en) * | 2019-12-31 | 2020-04-10 | 电子科技大学 | Film temperature sensor for detecting thermal insulation effect of thermal barrier coating |
| CN114457300A (en) * | 2022-02-10 | 2022-05-10 | 重庆臻宝实业有限公司 | Preparation process of lower electrode with crossed loop |
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| CN105463361A (en) * | 2015-12-15 | 2016-04-06 | 中国燃气涡轮研究院 | Turbine blade temperature measuring method based on flame spraying |
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| CN105463361A (en) * | 2015-12-15 | 2016-04-06 | 中国燃气涡轮研究院 | Turbine blade temperature measuring method based on flame spraying |
| CN106768441A (en) * | 2016-12-21 | 2017-05-31 | 中国燃气涡轮研究院 | A kind of Turbine Blade Temperature Field measuring method based on plasma spraying |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110220605A (en) * | 2019-06-28 | 2019-09-10 | 华能国际电力股份有限公司丹东电厂 | A kind of preparation method, measuring system and the measurement method of tube wall temperature measuring system |
| CN110987215A (en) * | 2019-12-31 | 2020-04-10 | 电子科技大学 | Film temperature sensor for detecting thermal insulation effect of thermal barrier coating |
| CN114457300A (en) * | 2022-02-10 | 2022-05-10 | 重庆臻宝实业有限公司 | Preparation process of lower electrode with crossed loop |
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Application publication date: 20180914 |