CN104483224B - A kind of chamber for ceramic material heating thermal shock - Google Patents
A kind of chamber for ceramic material heating thermal shock Download PDFInfo
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- CN104483224B CN104483224B CN201510018489.XA CN201510018489A CN104483224B CN 104483224 B CN104483224 B CN 104483224B CN 201510018489 A CN201510018489 A CN 201510018489A CN 104483224 B CN104483224 B CN 104483224B
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Abstract
The invention discloses a kind of chamber for ceramic material heating thermal shock.It includes Sealing furnace（10）And heating furnace（9）, heating furnace（9）By heating furnace base（13）It is supported on Sealing furnace（10）On inner bottom surface, Sealing furnace（10）Top is equipped with cylinder（1）, the cylinder motion bar that is connected with cylinder piston（2）Stretch into Sealing furnace（10）Specimen holder mechanism is connected in top center hole（5）, Sealing furnace（10）Inner top surface is equipped with guide wire straight down（8）, guide wire（8）Lower end passes through heating furnace（9）Apical pore ties up to heating furnace（9）Interior support（12）On, support（12）Cushion pad is laid above（11）, heating furnace（9）Heat-insulated carbon mat is plugged with apical pore（14）.The solution have the advantages that：In the test of the thermal shock resistance of ceramic material, the surface homogeneous heating of ceramic test piece can accurately control the target temperature of thermal shock, and test data is capable of the thermal shock resistance of accurate characterization ceramic material.
Description
Technical field
The present invention relates to a kind of temperature shock test device, and in particular to a kind of examination for ceramic material heating thermal shock
Experiment device.
Background technology
Ceramic material because its fusing point is high, and there are the excellent properties such as chemistry and physical stability well at high temperature and by
It is widely used in thermal structure field, such as hot junction of the thermally protective materials of superelevation velocity of sound aircraft and engine.It is but ceramic
For material because the fragility of itself, its thermal shock resistance is poor.For the ceramic material applied to thermal structure, especially in aviation
Space industry, it is often destroyed in use environment because by violent heating thermal shock.Therefore, ceramic material is studied
Thermal shock resistance just seem very necessary and important.
At present, the method for testing for the thermal shock resistance of ceramic material mainly includes hydrogen-oxygen injection heating, electric arc sprays
Penetrate heating, electrical heating, oxyacetylene torch heating, laser heating and arc tunnel etc..Wherein, hydrogen-oxygen injection heating, arc spraying
Heating, electrical heating and oxyacetylene torch heating are widely used because of the advantages that low cost and ease for operation.Laser is heated because of it
Heating surface (area) (HS is very small and normal is not used.And arc tunnel is because its cost is high and complicated limits its application.But
It is can have following problems when carrying out the heating thermal shock of ceramic material using above-mentioned common method：
1st, surface of test piece heating is uneven：In heating process, surface of test piece geometric center position elder generation steep temperature rise, cause to try
Part surface temperature distribution is extremely uneven；
2nd, because surface of test piece temperature distributing disproportionation is even, it is difficult to directly determine surface of test piece temperature；
3rd, thermal shock target temperature is difficult to control.
Problem above makes very big dispersiveness and error occurs during experiment, causes experimental result to characterize ceramics
The thermal shock resistance of material.Therefore, there is presently no a kind of heating thermal-shock resistance of practical, reliable test ceramic material
The device of energy.
The content of the invention
For technical problem present in prior art, the technical problems to be solved by the invention are just to provide one kind and are used for
The chamber of ceramic material heating thermal shock, it can implement the heating thermal shock test of ceramic test piece at a temperature of 2000 DEG C, and
Ceramic test piece surface homogeneous heating during by thermal shock, it can accurately control the target temperature of thermal shock.
The technical problems to be solved by the invention realize that it includes Sealing furnace and heating by such technical scheme
Stove, heating furnace are supported on Sealing furnace inner bottom surface by heating furnace base, and cylinder is housed at the top of Sealing furnace, is connected with cylinder piston
Cylinder motion bar, which stretches into, connects specimen holder mechanism, when cylinder motion bar moves upwards, test specimen in Sealing furnace top center hole
The jaw of clamping device is limited by Sealing furnace top center hole and clamps test specimen；The middle part of specimen holder mechanism is equipped with spiral bullet
Spring, when cylinder motion bar moves downward, the jaw of specimen holder mechanism is opened by the responsive to axial force of helical spring, is unclamped
Test specimen, Sealing furnace inner top surface are equipped with guide wire straight down, and the collar being tied with test specimen, guide wire are cased with guide wire
Lower end is tied up on the support in heating furnace through heating furnace apical pore, and cushion pad is laid above support, is plugged with heating furnace apical pore
Heat-insulated carbon mat.
Because heating furnace is warming up to the target temperature of thermal shock in advance, by the test specimen that specimen holder mechanism clamps from low temperature
Sealing furnace moment is fallen into heating furnace in hot environment, can keep each surface homogeneous heating of ceramic test piece, and the temperature of heating furnace
To preset, the caloric impact temperature of test specimen can be accurately controlled.
So the solution have the advantages that：In the test of the thermal shock resistance of ceramic material, the table of ceramic test piece
Face homogeneous heating, can accurately control the target temperature of thermal shock, and test data is capable of the heat resistanceheat resistant punching of accurate characterization ceramic material
Hit performance.
Brief description of the drawings
The brief description of the drawings of the present invention is as follows：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial enlarged drawing at A in Fig. 1；
Fig. 3 is the peripheral structure block diagram of the present invention.
In figure：1st, cylinder, 2, cylinder motion bar, 4, helical spring, 5, specimen holder mechanism, 6, test specimen, 7, the collar, 8, lead
To silk, 9, heating furnace, 10, Sealing furnace, 11, cushion pad, 12, support, 13, heating furnace base, 14, carbon mat.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
As depicted in figs. 1 and 2, the present invention includes Sealing furnace 10 and heating furnace 9, and heating furnace 9 is supported by heating furnace base 13
On the inner bottom surface of Sealing furnace 10, the top of Sealing furnace 10 is equipped with cylinder 1, and the cylinder motion bar 2 being connected with cylinder piston stretches into sealing
Specimen holder mechanism 5 is connected in the top center hole of stove 10, the inner top surface of Sealing furnace 10 is equipped with guide wire 8 straight down, guide wire 8
Lower end is tied up on the support 12 in heating furnace 9 through the apical pore of heating furnace 9, and support 12 lays cushion pad 11 above, and heating furnace 9 pushes up
Heat-insulated carbon mat 14 is plugged with hole.
Specimen holder mechanism 5 is spring forceps；Heating furnace 9 is induction heater, and the heater of heating furnace 9 is cylindrical shape graphite
Or zirconium boride heater, heating external surface winding conductive wire, conductive wire two ends stretch out Sealing furnace 10 and connect height
Frequency power.Described conductive wire can be copper wire or aluminium wire.Heating furnace 9 is to lead resistant to elevated temperatures cylindrical shape using high-frequency induction
Electric material (such as graphite or zironium boride ceramics) generates heat, and heating intracoelomic cavity temperature can reach 2000 DEG C
Temperature can reach 2000 DEG C in heating furnace 9, and the temperature in Sealing furnace 10 approaches with normal temperature, so heating furnace
Part in 9 has resistance to elevated temperatures, and guide wire 8 selects tungsten filament；The material of cushion pad 11 is carbon blanket.
As shown in figure 1, using it is of the invention when, the collar 7 is fastened on test specimen 6, the collar 7 is passed through and is enclosed on guide wire 8, test specimen
Clamping device 5 clamps test specimen 6, and the clamping process of test specimen 6 is：When cylinder motion bar 2 moves upwards, specimen holder mechanism 5
Jaw is limited by the top center hole of Sealing furnace 10 and clamps test specimen 6；
Start heating system, the burner hearth of heating furnace 9 is heated；After the fire box temperature of heating furnace 9 reaches target temperature, enter
Row insulation, soaking time is depending on test requirements document；
Clamped test specimen 6 is unclamped, its process is：When cylinder motion bar 2 moves downward, the pincers of specimen holder mechanism 5
Mouth is opened by the responsive to axial force of helical spring 4, unclamps test specimen 6；Test specimen 6 is slid by the collar 7 along guide wire 8, breaks heating
The carbon mat 14 of the top-portion apertures of stove 9, fall on the cushion pad 11 built in heating furnace 9.Test specimen 6 is incubated in heating furnace 9, insulation
Time is depending on test requirements document；Finally, stop heating, test specimen 6 is taken out after cooling and carries out follow-up Experiments of Machanics.
As shown in figure 3, the periphery of the present invention is connected with heating system, temp measuring system, cooling system, pumped vacuum systems, filled
Gas system, data collecting card and computer control system, computer control system are realized to testing box temperature by data collecting card
The collection of degree and air pressure signal and the control to temperature and pressure.Heating system controls the heating of heating furnace 9, temp measuring system
Temperature sensor is the W-Re formula thermocouple with ceramic protecting pipe, can normal work at 2000 DEG C；In-furnace temperature can also use
Color comparator pyrometer measures, and it has a visual optical sighting system, focus adjustable section, high accuracy, and high duplication receives target
Heat radiation, and measurable electric signal is converted into, measurement temperature is up to 2000 DEG C.Cooling system can connect running water progress
Water cooling, or connection water cooling unit carry out water cooling.According to test requirements document, start pumped vacuum systems, Sealing furnace 10 vacuumized,
Pumped vacuum systems includes mechanical pump and diffusion pump, by pumped vacuum systems vacuum in stove can be made to reach 10-2Pa.According to proving ring
Border is required, it is necessary to when inflating, and is first vacuumized, then to being inflated in Sealing furnace 10, inflation system includes air accumulator and gas tube,
The switch opened on gas tube can be toward inflation in body of heater, and the gas that inflation system fills can be inert gas or the oxygen such as argon gas
Deng.
It is 2000 DEG C that the present invention, which realizes temperature, the heating thermal shock test under vacuum, protective gas and aerobic thermal environment.
Tested using the present invention, ceramic test piece surface homogeneous heating during by thermal shock, while can accurately control hot punching
The target temperature hit, thus solve and heat pole not for surface of test piece present in ceramic material heating thermal shock test at present
The problem of uniformly and target temperature is unmanageable.
Claims (5)
1. a kind of chamber for ceramic material heating thermal shock, it is characterized in that：Including Sealing furnace (10) and heating furnace (9),
Heating furnace (9) is supported on Sealing furnace (10) inner bottom surface by heating furnace base (13), and cylinder (1) is housed at the top of Sealing furnace (10),
The cylinder motion bar (2) being connected with cylinder piston, which stretches into, connects specimen holder mechanism (5) in Sealing furnace (10) top center hole,
When cylinder motion bar (2) moves upwards, the jaw of specimen holder mechanism (5) is limited and pressed from both sides by Sealing furnace (10) top center hole
Tight test specimen (6)；The middle part of specimen holder mechanism (5) is equipped with helical spring (4), when cylinder motion bar (2) moves downward, test specimen
The jaw of clamping device (5) is opened by the responsive to axial force of helical spring (4), unclamps test specimen (6), Sealing furnace (10) inner top surface
Equipped with guide wire (8) straight down, the collar (7) being tied with test specimen (6) is cased with guide wire (8), under guide wire (8)
End is tied up on the support (12) in heating furnace (9) through heating furnace (9) apical pore, and support (12) lays cushion pad (11) above,
Heat-insulated carbon mat (14) is plugged with heating furnace (9) apical pore.
2. a kind of chamber for ceramic material heating thermal shock according to claim 1, it is characterized in that：Described examination
Part clamping device (5) is spring forceps.
3. a kind of chamber for ceramic material heating thermal shock according to claim 2, it is characterized in that：Described adds
Hot stove (9) is induction heater, and the heater of heating furnace (9) is cylindrical shape graphite or zirconium boride ceramic, and heating external surface twines
Around conductive wire.
4. a kind of chamber for ceramic material heating thermal shock according to claim 3, it is characterized in that：Described leads
It is tungsten filament to silk (8).
5. a kind of chamber for ceramic material heating thermal shock according to claim 4, it is characterized in that：Described is slow
Punching pad (11) is carbon blanket.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510018489.XA CN104483224B (en) | 2015-01-14 | 2015-01-14 | A kind of chamber for ceramic material heating thermal shock |
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| CN201510018489.XA CN104483224B (en) | 2015-01-14 | 2015-01-14 | A kind of chamber for ceramic material heating thermal shock |
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| CN104483224A CN104483224A (en) | 2015-04-01 |
| CN104483224B true CN104483224B (en) | 2017-11-14 |
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| JPH06102162A (en) * | 1992-09-17 | 1994-04-15 | Daikin Ind Ltd | Vapor recovering device for liquid tank type thermal shock testing device |
| JP2000088722A (en) * | 1998-09-09 | 2000-03-31 | Mekano Electronic Kk | Device for gripping electronic component |
| JP3898210B2 (en) * | 2005-04-05 | 2007-03-28 | 株式会社ヒューテック | Liquid tank type thermal shock test equipment |
| CN2837824Y (en) * | 2005-07-26 | 2006-11-15 | 比亚迪股份有限公司 | Impact testing apparatus |
| CN2921822Y (en) * | 2006-04-29 | 2007-07-11 | 徐地华 | Double-cylinder thermal impact testing machine |
| KR100851325B1 (en) * | 2006-12-29 | 2008-08-08 | 성균관대학교산학협력단 | Thermal cyclic test facility |
| KR100961065B1 (en) * | 2008-09-29 | 2010-06-01 | 한국전력공사 | Simulation test system for thermal impact ageing of power transmission insulator |
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