CN106596258A - Measuring device for surface transient temperature for cooling thermal shock test of ceramic material - Google Patents

Measuring device for surface transient temperature for cooling thermal shock test of ceramic material Download PDF

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Publication number
CN106596258A
CN106596258A CN201710113986.7A CN201710113986A CN106596258A CN 106596258 A CN106596258 A CN 106596258A CN 201710113986 A CN201710113986 A CN 201710113986A CN 106596258 A CN106596258 A CN 106596258A
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CN
China
Prior art keywords
temperature
ceramic material
thermocouple
thermal shock
test specimen
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710113986.7A
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Chinese (zh)
Inventor
张政军
陈丽敏
梁威
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Tsinghua University
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Tsinghua University
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Priority to CN201710113986.7A priority Critical patent/CN106596258A/en
Publication of CN106596258A publication Critical patent/CN106596258A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • G01N3/06Special adaptations of indicating or recording means
    • G01N3/066Special adaptations of indicating or recording means with electrical indicating or recording means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02Means for indicating or recording specially adapted for thermometers
    • G01K1/028Means for indicating or recording specially adapted for thermometers arrangements for numerical indication
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08Protective devices, e.g. casings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02Measuring 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/60Investigating resistance of materials, e.g. refractory materials, to rapid heat changes

Abstract

The invention relates to a measuring device for a surface transient temperature for a cooling thermal shock test of a ceramic material. The device comprises a ceramic material test piece, a temperature thermocouple, a metal wire, a conductor and a computer, wherein a sheathed thermocouple serves as the temperature thermocouple; a shallow groove is formed on the surface of the ceramic material test piece; a temperature sensing part at the front end of the temperature thermocouple is aligned with and falls into the groove; the temperature thermocouple is clung to, wound with and fixed with the ceramic material test piece by the metal wire; and the temperature thermocouple is connected with the computer through the conductor. According to the invention, the sheathed thermocouple with certain strength is adopted and can be fixed with the test piece and then can be put into a heating furnace and a cooling medium, so that the transient temperature variation on the surface of the test piece can be measured and recorded in the whole process. Besides, a coating layer does not need to be spliced with the temperature sensing part of the temperature thermocouple, so that the rapid transient change parameter of the temperature field on the surface of the ceramic material can be quickly sensed and the test result is accurate and reliable. The device also has the advantages of simple structure, easiness in operation, high practicability, and the like.

Description

For the surface transient temperature measuring apparatus of ceramic material cooling thermal shock experiment
Technical field
The present invention relates to temperature shock test research field, and in particular to a kind of for ceramic material cooling thermal shock experiment Surface transient temperature measuring apparatus.
Background technology
Ceramic material is high because of its fusing point, and the quilt with the excellent properties such as chemistry and physical stability well at high temperature It is widely used in thermal structure field, such as the thermally protective materials and electromotor of the hypersonic aircraft such as guided missile, space shuttle Hot junction etc..But, as in flight course, Aerodynamic Heating can produce transient high temperature and high hot-fluid, and glide phase can Jing Transient state low temperature is gone through, therefore the structure member of aircraft will be subjected to the huge thermal shock brought by jump in temperature.Ceramic material itself The weakness fragility of presence is big, heat conductivity is low so that the reliability of structure member is severely impacted.Structure in flight course The main cause of part destruction is exactly material internal thermal stress caused by the temporal temperature gradient that thermal shock is produced.Therefore interview on ground Test measurement and record under extreme thermal environment, the dynamic changing process of material surface temperature, for hypersonic aircraft Thermal protection has particularly important practical significance with safe design.
The experimental technique of thermal shock resistance research mainly has two kinds:One kind is thermal shock, and another kind is cooling heat punching Hit.Currently used for the surface transient temperature measuring apparatus of ceramic material thermal shock research, it is mainly used in studying thermal shock, adopts By temperature thermocouple bonding or it is crimped on the mode of material surface.By the way of bonding, easily degumming separation is led at high temperature Cause surface temperature measurement inaccurate, and adhesive linkage has certain thickness, affect heat conduction velocity, temperature thermocouple can not be anti-immediately The rapidly change of material surface temperature should be gone out.And the mode for crimping, can only study galvanic couple and in the case of test specimen is maintained static plus Thermal shock, it is difficult to which research is needed test specimen and galvanic couple while the cooling thermal shock situation of cold environment is quickly transferred to from thermal environment.
As ceramic material surfaces are subject to tension (during chilling) than being easier to cause destruction by compressive stress (during anxious heat), So the chilling of ceramic material is more dangerous than anxious heat, the correlational study for cooling down thermal shock is similarly extremely important.Therefore, it is necessary to open The surface transient temperature measuring apparatus of the thermal shock research of lowering the temperature for ceramic material for sending out new, carry out reliable recording hypersonic winged The dynamic change situation of row device cooling thermal shock test process in which materials surface temperature field, with the reliability of guarantee test.
The content of the invention
The present invention technology solve problem be:Overcome the deficiencies in the prior art, there is provided a kind of for ceramic material cooling heat The surface transient temperature measuring apparatus of impact experiment, the device accurately and reliably can be measured and record hypersonic aircraft During cooling thermal shock test, the high speed dynamic change in ceramic material surface of test piece temperature field, and simple structure, user Just, be guided missile, the calorific intensity of the hypersonic aircraft such as space shuttle check provides with safety and Protection reliably test according to According to.
For achieving the above object, technical solution of the invention is:
A kind of surface transient temperature measuring apparatus of thermal shock experiment of lowering the temperature for ceramic material, it is characterised in that include: Temperature thermocouple, ceramic material test specimen, tinsel, wire and computer;Described temperature thermocouple adopts armoured thermocouple, Ceramic material surface of test piece is machined with a shallow connected in star matched with the temperature-sensitive portion size of temperature thermocouple front end, thermometric thermoelectricity It is even anterior curved, thermocouple front end temperature-sensitive portion is aligned and is fallen within shallow connected in star;The tinsel is by temperature thermocouple It is close to ceramic material test specimen to wind and be fixed together;The transient temperature signal for perceiving is changed into telecommunications by temperature thermocouple Number, Jing wires are sent into computer and are stored and calculated.
Preferably, thin copper wire of the tinsel using a diameter of 0.3-0.5mm.
The present invention has the new technique effect of advantages below and protrusion:1. armoured thermocouple have can bend, it is high pressure resistant, hot Many advantages, such as response time is fast and sturdy and durable, and with certain intensity, after fixing with test specimen can band with test specimen one Play turnover heating furnace and cooling medium, and then whole measurement in real time, the transient temperature change of record surface of test piece.2. thin copper wire is soft Good toughness, be conveniently fastened thermocouple and test specimen, and the heat conductivity of copper is good, has substantially no effect on heat in the case of diameter very little Impact in impact test to surface of test piece heat transfer.3. as thermocouple front end temperature-sensitive portion does not have bonding coating, thermocouple Temperature-sensitive portion can perceive rapidly the rapidly transient changing parameter in ceramic material surfaces temperature field, by computer recording, and calculate During cooling thermal shock test, the high speed change curve of ceramic material surfaces temperature makes result of the test accurate, reliable.4. should Device also has simple structure, easy to operate, the advantages of practical.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is certain ZrB measured using the present invention2Base ceramic material test specimen surface of test piece during 600 DEG C of thermal shocks Temperature changing curve diagram.
Fig. 3 is the corresponding differential curve figure of temperature descending section curve in Fig. 2.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
A kind of surface transient temperature measuring apparatus of thermal shock experiment of lowering the temperature for ceramic material that Fig. 1 is provided for the present invention Principle schematic diagram., the device includes temperature thermocouple 4, ceramic material test specimen 1, tinsel 5, wire 6 and computer 7; The temperature thermocouple 4 is added on 1 surface of ceramic material test specimen using the armoured thermocouple that arbitrarily can be bent with some strength Work has a shallow connected in star 2 matched with 3 size of temperature-sensitive portion of 4 front end of temperature thermocouple, and 4 front portion of temperature thermocouple curves properly Arc, thermocouple front end temperature-sensitive portion 3 is aligned and is fallen within shallow connected in star 2, shallow connected in star 2 limits the horizontal of temperature-sensitive portion 3 It is mobile;Temperature thermocouple 4 is close to ceramic material test specimen 1 with tinsel 5 to be fastened, make thermocouple front end temperature-sensitive portion 3 with 1 surface of ceramic material test specimen remains close contact, while ensureing the test in whole turnover heating furnace and cooling medium In journey, temperature thermocouple 4 is simultaneously mobile with ceramic material test specimen 1 without occurring to loosen, it is ensured that the accuracy of temperature-measuring results and can By property;Thermocouple front end temperature-sensitive portion 3 perceives the temperature change on 1 surface of ceramic material test specimen, and temperature change is changed into electricity Signal, Jing wires 6 are sent into computer 7 and are stored and calculated, and the rapidly transient state for measuring 1 surface temperature of ceramic material test specimen becomes Change.
The material and diameter of described armoured thermocouple can be according to thermal shock target heating temperature Rational choice, armouring galvanic couple Filament length degree needs Rational choice according to heating furnace and practical operation;Galvanic couple diameter is can bear the weight of test specimen without making galvanic couple Diastrophic minimum diameter is advisable, and buckling phenomenon easily occurs in too thin insufficient strength, affects operation and measurement result, too slightly Thermometric response speed is slower, and high speed dynamic measurement error can be caused to increase.
The tinsel adopts the thin copper wire of a diameter of 0.3-0.5mm preferably;Too thin intensity is not enough to bear test specimen Weight, so as to pass in and out heating furnace and cooling medium together with after causing thermocouple to fix with test specimen during occur loosening, shadow Ring the accuracy of measurement result, it is too thick can then affect to test in heat transfer;The thin copper wire should be a complete segment and have Suitable length, can be tight by temperature thermocouple with parallel temperature thermocouple both direction from vertical temperature thermocouple respectively during winding Patch ceramic material test specimen is fastened, to ensure fixed effect when winding;When being fastened, the winding number of turns of thin copper wire is with energy Fix and be advisable, it is unsuitable overstocked, to reduce the impact in test to surface of test piece heat transfer.
It is shallow with what the temperature-sensitive portion size of temperature thermocouple front end was matched that the ceramic material surface of test piece processes a size Connected in star 2, plays the spacing effect of plane, it is to avoid the transverse shifting in thermocouple front end temperature-sensitive portion during test, it is ensured that thermometric process The reliable contacts of middle thermocouple and ceramic material surface of test piece.
In ceramic material cooling thermal shock test, as armoured thermocouple has certain intensity, try with ceramic material After part is fixed, can band be put in heating furnace together with ceramic material test specimen and be incubated to reaching after thermal balance, then put rapidly together Enter in cooling medium;Meanwhile, in whole process of the test, thermocouple keeps reliable contacts, thermocouple with ceramic material surface of test piece Can be with whole measurement in real time, the transient temperature change of record surface of test piece.
Embodiment:Temperature thermocouple 4 adopts a diameter of 1.5mm of thermocouple wire, length for the K-type armoured thermocouple of 600mm, carefully 5 a diameter of 0.3mm of copper wire;Temperature thermocouple 4 is close to ceramic material test specimen 1 with thin copper wire 5 to be fastened, before making thermocouple End temperature-sensitive portion 3 remains close contact with 1 surface of ceramic material test specimen, while ensureing to be situated between in whole turnover heating furnace and cooling In the test process of matter, temperature thermocouple 4 is simultaneously mobile with ceramic material test specimen 1 without occurring to loosen.
In ceramic material cooling thermal shock test, temperature thermocouple 4 is close to into ceramic material test specimen 1 and is fastened Afterwards, it is incubated in being put into heating furnace together to reaching after thermal balance, then is put in cooling medium rapidly together, whole process of the test In, the temperature thermocouple front end temperature-sensitive portion 3 with 1 intimate surface contact of ceramic material test specimen detects 1 surface of ceramic material test specimen Temperature change, and temperature change is changed into into the signal of telecommunication, Jing wires 6 are sent into computer 7 and are stored and calculated, and draw ceramics The dynamic changing curve of 1 surface temperature of material test specimen, (thermal shock heating-up temperature is 600 DEG C to such as Fig. 2, and coolant temperature is 20 DEG C) shown in.
Can be seen by Fig. 2, in whole process of the test, observing and controlling temperature curve is smoothed, no jitter phenomenon.Demonstrate this Invention accurately and effectively can be entered to the dynamic change of 1 surface temperature of ceramic material test specimen during whole thermal shock test Row measurement in real time and record.
From figure 3, it can be seen that quenching cooling thermal shock is a process being exceedingly fast, the surface temperature of ceramic material test specimen 1 In 3 seconds just from thermal shock heating-up temperature 600 DEG C reached 20 DEG C of coolant temperature, in 0.5 second, transient temperature becomes Change has just reached 500 DEG C/s of maximum or so.
Do not elaborate in description of the invention and partly belong to techniques well known.

Claims (2)

1. it is a kind of for ceramic material lower the temperature thermal shock experiment surface transient temperature measuring apparatus, it is characterised in that include:Survey Warm galvanic couple (4), ceramic material test specimen (1), tinsel (5), wire (6) and computer (7);Described temperature thermocouple (4) Using armoured thermocouple, there is the temperature-sensitive portion (3) of and temperature thermocouple (4) front end in ceramic material test specimen (1) Surface Machining The shallow connected in star (2) of size matching, temperature thermocouple (4) are anterior curved, thermocouple front end temperature-sensitive portion (3) is aligned and is fallen into Within shallow connected in star (2);Temperature thermocouple (4) is close to ceramic material test specimen (1) and winds and be fixed on one by the tinsel (5) Rise;The transient temperature signal for perceiving is changed into the signal of telecommunication by temperature thermocouple (4), and Jing wires (6) are sent into computer (7) and carried out Storage and calculating.
2. a kind of surface transient temperature measuring for ceramic material cooling thermal shock experiment according to claim 1 is filled Put, it is characterised in that:Thin copper wire of the tinsel (5) using a diameter of 0.3-0.5mm.
CN201710113986.7A 2017-02-28 2017-02-28 Measuring device for surface transient temperature for cooling thermal shock test of ceramic material Pending CN106596258A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108344655A (en) * 2018-01-30 2018-07-31 重庆大学 Ceramic material spray-type thermal shock rig and method under a kind of closed environment
CN108459047A (en) * 2018-05-23 2018-08-28 华侨大学 The measuring device and measuring method of new type fireproof board thermal coefficient
CN113465394A (en) * 2021-05-27 2021-10-01 中国工程物理研究院材料研究所 Multi-field coupling microwave sintering device and control method thereof
CN115684628A (en) * 2022-10-11 2023-02-03 日升餐厨科技(广东)有限公司 Indirect temperature measurement method based on thermal shock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2041038U (en) * 1988-06-08 1989-07-12 杭州华立仪表厂 Compound temp. sensor
CN2529225Y (en) * 2002-03-11 2003-01-01 北京航空航天大学 Deivice for measuring transient temp. of ceramic warhead surface of guided missile high-speed thermal shock test
CN102183312A (en) * 2011-03-16 2011-09-14 北京航空航天大学 Surface high-temperature measurement device for nonmetallic heat resistant material plane test piece of hypersonic speed aircraft
CN203858044U (en) * 2014-04-24 2014-10-01 深圳供电局有限公司 Temperature measuring probe capable of rising temperature
JP2016095294A (en) * 2014-11-07 2016-05-26 日本碍子株式会社 Thermocouple fixation method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2041038U (en) * 1988-06-08 1989-07-12 杭州华立仪表厂 Compound temp. sensor
CN2529225Y (en) * 2002-03-11 2003-01-01 北京航空航天大学 Deivice for measuring transient temp. of ceramic warhead surface of guided missile high-speed thermal shock test
CN102183312A (en) * 2011-03-16 2011-09-14 北京航空航天大学 Surface high-temperature measurement device for nonmetallic heat resistant material plane test piece of hypersonic speed aircraft
CN203858044U (en) * 2014-04-24 2014-10-01 深圳供电局有限公司 Temperature measuring probe capable of rising temperature
JP2016095294A (en) * 2014-11-07 2016-05-26 日本碍子株式会社 Thermocouple fixation method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108344655A (en) * 2018-01-30 2018-07-31 重庆大学 Ceramic material spray-type thermal shock rig and method under a kind of closed environment
CN108459047A (en) * 2018-05-23 2018-08-28 华侨大学 The measuring device and measuring method of new type fireproof board thermal coefficient
CN113465394A (en) * 2021-05-27 2021-10-01 中国工程物理研究院材料研究所 Multi-field coupling microwave sintering device and control method thereof
CN115684628A (en) * 2022-10-11 2023-02-03 日升餐厨科技(广东)有限公司 Indirect temperature measurement method based on thermal shock
CN115684628B (en) * 2022-10-11 2023-09-08 日升餐厨科技(广东)有限公司 Indirect temperature measurement method based on thermal shock

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Application publication date: 20170426