CN110174178A - The installation method of high temperature sensor - Google Patents
The installation method of high temperature sensor Download PDFInfo
- Publication number
- CN110174178A CN110174178A CN201910554577.XA CN201910554577A CN110174178A CN 110174178 A CN110174178 A CN 110174178A CN 201910554577 A CN201910554577 A CN 201910554577A CN 110174178 A CN110174178 A CN 110174178A
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- China
- Prior art keywords
- high temperature
- temperature sensor
- installation
- testpieces
- spraying
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
Abstract
The invention proposes a kind of installation methods of high temperature sensor, comprising the following steps: coarse processing carries out rough surface processing to the installation position of testpieces, while protecting non-mounting position；The installation position of testpieces is cleaned；Active sprayed on material is sprayed on to the installation region of testpieces in a manner of pyrolytic coating again, forms insulating coating；Determine temperature sensor mounted position, and the lead segmentation with high temperature gummed tape by temperature sensor with casing protection is fixed on the position；Sprayed on material is sprayed on the surface that temperature sensor, lead and insulating coating are not covered by high temperature gummed tape and temperature sensor, forms seal coat；The resistance value of temperature sensor after checking spraying, completes the installation of temperature sensor.The present invention completes the installation of 1400 DEG C of high temperature sensors using pyrolytic coating technique as technological means, is achieved 1400 DEG C of temperature tests.
Description
Technical field
The invention belongs to aerospace hot environment experimental technique fields, and in particular to a kind of peace of high temperature sensor
Dress method.
Background technique
With the development of hypersonic aircraft, world shuttle vehicle, hot environment test mission increases year by year, instrument
Equipment must be able to work under the high temperature conditions, while consider the particularity of spacecraft testing, and the installation needs of test equipment to the greatest extent may be used
Can not damage model or spacecraft surface and structure.With the continuous deepening of research, there is various new high temperature measurement hand
Section and method, but restricted by many factors such as environment temperature, testing cost, measurement accuracy, conventional sensor measurement method
It is still that current most important means of testing acquires spacecraft surface or interior using temperature sensor during heat test
The temperature data in portion.
Common temperature sensor installation method has bonding, is spirally connected, rivets, welding.In room temperature to 250 DEG C of experimental conditions
Under, 3M adhesive tape, silicon rubber stickup sensor is commonly used, it is easy to operate, but cannot use at high temperature；Using riveting, spiral shell
It connects, weld installation sensor, it is fixed, but it is easily damaged sensor, and destroy surface of test piece；In the case of high temperature also
Adhesive can be used, its advantage is that not damaging to test specimen, high temperature adhesive used at present can be resistant to using simple
800 DEG C~1400 DEG C of high temperature, but high-temp glue needs artificial proportion, and has strict requirements to test specimen adhesive surface,
It is easy to fall off when connecting sensor with adhesive on smooth surface；Glue is easy to happen brittle rupture under the high temperature conditions, to sensing
Device causes extreme influence, and serious conditions will lead to sensor adhesion failure.When tested position operating temperature is more than 1400 DEG C or more
When, can not with previous method of attaching arrangement high temperature sensor.
Summary of the invention
A primary object of the present invention is to overcome at least one defect of the above-mentioned prior art, and providing one kind can fit
Answer the installation method of the high temperature sensor of 1400 DEG C or more hot environments.
The purpose of the present invention is what is be achieved through the following technical solutions:
The installation method of temperature sensor under aircraft hot environment, includes the following steps:
Step 1: rough surface processing is carried out to the temperature sensor installation position of aircraft testpieces, while being protected non-
Blast technique can be used in installation position, rough surface processing, it can using high-hardness to testpieces surface biography to be installed
The part of sensor and its high temperature wire carries out blast polishing；Non-mounting position is protected with Teflon high temperature adhesive plaster, periphery pressure
It is real, prevent alice；
Step 2: the installation position of testpieces is cleaned using ethyl alcohol and/or acetone reagent；
Step 3: flame spray device is used, by Al2O3It is sprayed on the installation region of testpieces, to establish insulating bottom layer,
Form insulating coating, sprayed on material uses Al2O3 bar, adjusts oxygen, and setting pressure is 0.58MPa, flow for 70~
80SCFH adjusts acetylene, and setting pressure is 0.1MPa, and flow is 30~40SCFH, adjusts air, and setting pressure is 0.58MPa,
Flow is 30~40m3/h；It is 2.5mm/s that feeding, which is arranged, to control speed, and the thickness of insulating coating should be controlled in spraying process, thick
About 15-25 μm of degree, can do thin as far as possible in the case where meeting dielectric strength；
Step 4: it determines the position of installation high temperature sensor, and is segmented fixed high temperature temperature with Teflon high temperature gummed tape
Spend the lead of sensor；
Step 5: fixed high temperature sensor surface ceramic coated layer again is completed, seal coat is formed；Spraying
After the completion, the high temperature gummed tape in non-spraying region is removed；
Step 6: the resistance value of the high temperature sensor after measurement spraying, resistance value normally complete temperature sensor
Installation.
Wherein, the hardness of the sand grains material of blast is preferably more than the hardness on testpieces surface, such as white fused alumina or Buddha's warrior attendant
Sand etc..
Wherein, the sand grains of blast is coarse sand and further preferably Grains is 100 mesh coarse sand below.
Wherein, blast pressure is preferably 0.5MPa or more.
Further, spray insulation coating comprises determining that temperature sensor mounted position, and with high temperature gummed tape by temperature
The lead segmentation of sensor strip casing protection is fixed on the position；Seal coat is sprayed, sprayed on material is sprayed on temperature and is passed
On the surface that sensor, lead and insulating coating are not covered by high temperature gummed tape and temperature sensor, seal coat is formed；
Further, spray seal coat the following steps are included:
High temperature sensor is placed on insulating coating；A plurality of high temperature gummed tape is sensed across high-temperature temperature is pasted on
On device lead and both ends are pasted on insulating coating, and a plurality of high temperature gummed tape parallel interval is arranged, and between adjacent two high temperature gummed tapes
Gap is formed, spraying forms seal coat on each gap, and high temperature gummed tape is removed.
The beneficial effects of the invention are that a kind of installation method of high temperature sensor is innovatively proposed, using spray
High temperature sensor is successfully fixed on testpieces, is not destroyed by correctly spraying sequence and technological parameter by painting technology
Testpieces structure, makes 1400 DEG C of high-temperature temperature measurements become possible, provides reliable guarantee for hot environment test mission.
Detailed description of the invention
Fig. 1 is the process schematic of the high temperature sensor installation method in the present invention.
Appended drawing reference: 1- insulating coating, 2- high temperature sensor, 3- protection sleeve pipe, 4- outer lead, 5- spraying covering apply
Layer.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The installation method of high temperature sensor proposed by the present invention first pre-processes testpieces surface, provides suitable
The good substrate required together in spraying；Then the preparation of insulating coating is completed using flame spraying process；Thereafter temperature is completed to pass
The fixation of sensor；Then spraying high temperature sprayed on material forms seal coat again；Finally check the temperature sensing after spraying
The resistance value of device completes the installation of temperature sensor.
In the present embodiment, the installation method of temperature sensor proposed by the present invention, for will be suitable for 1400 DEG C with
On high temperature sensor be installed on testpieces.Wherein, the installation method of above-mentioned high temperature sensor mainly include with
Lower step:
Surface preparation
Surface preparation is one layer to be artificially formed on substrate material surface with the machinery of matrix, physical and chemical properties not
The process on same surface layer.The purpose of surface treatment is increased and applies to purify matrix surface and have certain roughness
The bond strength of layer and matrix both increases adhesive force, to guarantee that coating is with good performance.
Since test object works under worst hot case, the fixed reliability of temperature sensor installation become influence test at
The key factor lost, the effective reliably working of temperature sensor in test necessarily require coating adhesion property good, and nothing falls off
Risk exists.And the excellent premise of coating adhesion property is to ensure that surface of test piece processing rationally, effectively, is conducive to coating spraying and pacifies
The features such as dress.
The testpieces surface preparation is divided into coarse processing and surface clean two parts.
Step 1: rough surface processing
Blast technique can be used in rough surface processing, and the hardness of the sand grains material of blast is preferably more than testpieces surface
Hardness, such as white fused alumina or diamond dust etc..The sand grains of blast is preferably coarse sand and further preferably Grains is that 100 mesh are below
Coarse sand.Blast pressure is preferably 0.5MPa or more；With this condition, roughening testpieces surface degree is suitable for spraying subsequent high temperature
Painting reaches optimum efficiency；Angle of gun should be sprayed perpendicular to sand blasted surface with constant speed in surface of test piece movement as far as possible
Mouth is about 50mm away from test specimen distance, and blast time is about 8 seconds.After the completion of blasting treatment, blown off at blast with dry high pressure gas
Testpieces surface after reason, blast pressure are 0.4MPa~0.6MPa, blow off residual sand grains.Non-mounting position Teflon high temperature
Adhesive plaster is protected, and periphery has to be compacted, and prevents alice；
Step 2: testpieces surface clean
Specifically, in the present embodiment, the step of for surface clean, it is more readily soluble that acetone, ethyl alcohol one kind may be selected
The medium of organic matter is solved as cleaning solution, and the mode that flushing or ultrasonic cleaning can be used cleans installation region,
To reach removal testpieces surface and gap residual stains.In addition, to installation region can be used dried and clean compressed air into
Row purging.
Step 3: the preparation of insulating coating
Specifically, in the present embodiment, the step of preparation for insulating coating, after sandblasting and cleaning, using Teflon
After high temperature gummed tape protects the position for being not required to spray applied insulation, tried using ROKIDE spraying flame (being free of insulating materials)
Part surface is quickly swept several times, carries out the pre-heat treatment to surface of test piece, coating adhesion property after spraying can be improved.Then by Al2O3Pottery
Porcelain stick is loaded onto, and spraying parameter is arranged.Adjust Oxygen control knob, setting pressure is 0.58MPa, flow for 70~
80SCFH；Acetylene control handle is adjusted, setting pressure is 0.1MPa, and flow is 30~40SCFH；Air control handle is adjusted, if
Setting pressure is 0.58MPa, and flow is 30~40m3/h；It is 2.5mm/s that feeding, which is arranged, to control speed.Under the spray pressure,
Al2O3It is high that testpieces surface bonding strength is sprayed to after material molten, nozzle is perpendicular to testpieces surface and the left side distance about 100mm
The right side, by the Al after melting2O3It is ejected into testpieces surface, makes to form firm combination between coating and testpieces matrix, be formed exhausted
Edge layer, coating layer thickness are about 15-25 μm, and insulation performance requirement is effectively ensured.
Step 4: fixed high temperature sensor
The position for determining installation high temperature sensor, high temperature sensor is placed on insulating coating；Thereafter it uses
The Teflon high temperature gummed tape that width is about 1mm~2mm is across the lead for being pasted on high temperature sensor and protecting with porcelain bushing
Upper and both ends are pasted on insulating coating, and a plurality of high temperature gummed tape parallel interval is arranged, and are spaced about between adjacent two high temperature gummed tapes
For 2mm~5mm, temperature sensor must be made closely to be fitted in surface of insulating layer；
Step 5: the preparation of seal coat
Flame-spraying is again carried out on the high temperature sensor surface for completing fixed；When spraying, along sensor measurement end
It is sprayed to lead extreme direction is mobile, coating thickness is to cover temperature sensor, subject to fixation.Sprayed on material is sprayed on temperature
It spends on the surface that sensor measurement end, lead and insulating coating are not covered by high temperature gummed tape and temperature sensor, forms covering and apply
Layer；After the completion of spraying, the careful high temperature gummed tape for removing non-spraying region.
Step 6: using the resistance value of the high temperature sensor after the spraying of general-purpose table look-up, resistance value normally illustrates temperature
The installation for spending sensor is correct.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of protection of the claims
It is quasi-.
Claims (5)
1. the installation method of the temperature sensor under aircraft hot environment, includes the following steps:
Step 1: rough surface processing is carried out to the temperature sensor installation position of aircraft testpieces, while protecting non-installation
Blast technique can be used in position, rough surface processing, it can using high-hardness to testpieces surface sensor to be installed
And its part of high temperature wire carries out blast polishing；Non-mounting position is protected with Teflon high temperature adhesive plaster, and periphery compacting is prevented
Only alice；
Step 2: the installation position of testpieces is cleaned using ethyl alcohol and/or acetone reagent；
Step 3: flame spray device is used, by Al2O3It is sprayed on the installation region of testpieces, to establish insulating bottom layer, is formed
Insulating coating, sprayed on material use Al2O3 bar, adjust oxygen, and setting pressure is 0.58MPa, and flow is 70~80SCFH, adjust
Acetylene is saved, setting pressure is 0.1MPa, and flow is 30~40SCFH, adjusts air, and setting pressure is 0.58MPa, flow 30
~40m3/h；It is 2.5mm/s that feeding, which is arranged, to control speed, and the thickness of insulating coating, thickness about 15- should be controlled in spraying process
It 25 μm, can be done as far as possible in the case where meeting dielectric strength thin；
Step 4: it determines the position of installation high temperature sensor, and is segmented fixed high-temperature temperature with Teflon high temperature gummed tape and passes
The lead of sensor；
Step 5: fixed high temperature sensor surface ceramic coated layer again is completed, seal coat is formed；Spraying is completed
Afterwards, the high temperature gummed tape in non-spraying region is removed；
Step 6: the resistance value of the high temperature sensor after measurement spraying, resistance value normally complete the installation of temperature sensor.
2. the method for claim 1, wherein the hardness of the sand grains material of blast is higher than the hardness on testpieces surface.
3. the method for claim 1, wherein the sand grains material is white fused alumina or diamond dust.
4. the method for claim 1, wherein the sand grains of blast be coarse sand and further preferably Grains be 100 mesh with
Under coarse sand.
5. the method for claim 1, wherein blast pressure is 0.5MPa or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910554577.XA CN110174178A (en) | 2019-06-25 | 2019-06-25 | The installation method of high temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910554577.XA CN110174178A (en) | 2019-06-25 | 2019-06-25 | The installation method of high temperature sensor |
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| Publication Number | Publication Date |
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| CN110174178A true CN110174178A (en) | 2019-08-27 |
Family
ID=67698895
Family Applications (1)
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| CN201910554577.XA Pending CN110174178A (en) | 2019-06-25 | 2019-06-25 | The installation method of high temperature sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593226A (en) * | 2020-12-07 | 2021-04-02 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for improving coating bonding strength in spraying installation of optical fiber sensor |
| CN112893041A (en) * | 2019-12-04 | 2021-06-04 | 清华大学 | Spraying method of sensor coating |
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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 |
| CN107843371A (en) * | 2017-11-09 | 2018-03-27 | 中国航发湖南动力机械研究所 | The installation method of strain gauge |
| CN109321859A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | A kind of metal surface pre-treating method |
| CN109722618A (en) * | 2017-10-26 | 2019-05-07 | 沈阳黎明国际动力工业有限公司 | A kind of supersonic flame spraying technique of cobalt chromium tungsten wear-resistant coating |
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2019
- 2019-06-25 CN CN201910554577.XA patent/CN110174178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4552342B2 (en) * | 2000-06-30 | 2010-09-29 | 株式会社デンソー | Manufacturing method of gas sensor |
| 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 |
| CN109722618A (en) * | 2017-10-26 | 2019-05-07 | 沈阳黎明国际动力工业有限公司 | A kind of supersonic flame spraying technique of cobalt chromium tungsten wear-resistant coating |
| CN107843371A (en) * | 2017-11-09 | 2018-03-27 | 中国航发湖南动力机械研究所 | The installation method of strain gauge |
| CN109321859A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | A kind of metal surface pre-treating method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112893041A (en) * | 2019-12-04 | 2021-06-04 | 清华大学 | Spraying method of sensor coating |
| CN112593226A (en) * | 2020-12-07 | 2021-04-02 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for improving coating bonding strength in spraying installation of optical fiber sensor |
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Application publication date: 20190827 |