CN1796970A - Thermal fatigue tester - Google Patents
Thermal fatigue tester Download PDFInfo
- Publication number
- CN1796970A CN1796970A CN 200410100451 CN200410100451A CN1796970A CN 1796970 A CN1796970 A CN 1796970A CN 200410100451 CN200410100451 CN 200410100451 CN 200410100451 A CN200410100451 A CN 200410100451A CN 1796970 A CN1796970 A CN 1796970A
- Authority
- CN
- China
- Prior art keywords
- motor
- operation circuit
- circuit
- time
- contact
- Prior art date
- 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.)
- Granted
Links
Abstract
The invention provides a thermal fatigue tester, where a cooling system, a heating system, a control system and a lift system are arranged on a bracket; the cooling system is composed of a water tank and a thermometer inserted in the water, the heating system is composed of a resistance furnace, a slide gate and a thermocouple inserted in the resistance furnace, and the electric machine of the lift system drives a test piece through reduction gearbox and rotary table; the control system is composed of raising control circuit, heat insulating time control circuit, lowering control circuit, cooling time control circuit, slide gate control circuit, circulating counting control circuit and the like; the contacts of a raising time relay are in the heat insulating time control circuit and the power supply circuit of a slide gate closing electromagnetic relay; the contacts of a heat insulating time relay are in the lowering control circuit and the power supply circuit of a slide gate opening electromagnetic relay; the contacts of a lowering time relay are in the cooling time control circuit; the contacts of a cooling time relay are in the raising control circuit and the counting control circuit; the contacts of a counter are in the main circuit of the control system. The advantages: completely automatic, flexible to operate and accurate to locate.
Description
Technical field:
The present invention relates to the material test technology, especially fatigue test of materials technology.
Background technology:
Heat fatigue is meant that material free expansion or contraction that temperature variation causes suffer restraints, consequently at material internal because of being out of shape restricted generation thermal stress, when temperature changed repeatedly, this thermal stress also changed repeatedly, thereby material is sustained damage.High temperature alloy is mainly used in makes aero-turbine hot-end component and the various high-temperature components of space rocket engine, is the requisite critical component of modern Aeronautics and Astronautics engine.In the Aeronautics and Astronautics engine, high temperature alloy long-term work under 600～1200 ℃ of high temperature and complex stress effect, condition is more abominable.Especially inhomogeneous when the firing chamber internal combustion, work when bad, bigger as the alloy affected by hot loading of guide vane, in this case, easily produce fatigue crack.Therefore heat fatigue is the main cause that the turbine engine guide vane destroys in advance.Heat fatigue cracking also often takes place in the blade of gas engine and wheel disc (23), and has also limited greatly their serviceable life.The crackle of blade is created in the intake and exhaust limit more, is many tiny crackles.Wheel disc (23) therefore causes circumferential thermal stress because wheel hub and wheel rim radially produce the very big temperature difference outside wheel rim, cause wheel disc (23) bottom land crackle.The process that produces heat fatigue cracking from above each part as can be known, heat fatigue is high temperature alloy parts common a kind of failure modes, particularly those bigger parts that are hit when high temperature, as guide vane etc.The part of many hot operations often is not stressed excessive and damage, but damages owing to constantly catching a cold to be heated.As the intake and exhaust pipeline of burner inner liner, cylinder, engine, and forging die, roll etc., under the effect of alternating temperature-changing, also produce heat fatigue cracking, and destroy through regular meeting.Therefore, to the part of working under the temperature fluctuation change condition, must consider the thermal fatigue property index of material.Though the heat fatigue phenomenon is subjected to common concern, thermal fatigue test method has been done many researchs both at home and abroad, formulated some test specifications, up to the present also there is not the recognized standard test method in the world.In China, there is not the national standard of thermal fatigue test yet.Therefore, the research of heat fatigue also there are a lot of methods, but all do not gain unanimous acceptance.Method relatively more commonly used now is qualitative relative method.The crack length that produces under the cycle index of a certain length or certain the regulation cycle index with main crack growth is as the standard of material thermal fatigue resistance.Abroad, equipment relatively more commonly used is the fluidized-bed device.But at home, study fewerly to heat fatigue.Test method and equipment are also different, and the heating back in stove that has is taken out to be placed directly in the water and cooled off, and this method human factor is more, is difficult to the accuracy of warranty test.The employing thermal fatigue tester that has, control with contact switch and to finish stopping of motor, generally speaking, motor triggers the back because inertia also needs some time of turning round in the contact, and makes the position of sample in heating system and cooling system deviation occur, very big deviation can occur when these deviation accumulations, and the contact frequency of exposure many after, its sensitivity also can reduce, and hysteresis phenomenon is more serious, thereby deviations is increased.This just has bigger influence to test findings.
Summary of the invention:
The object of the present invention is to provide a kind of full automatic, flexible operation, the reliable thermal fatigue tester of accurate positioning.
The invention provides a kind of thermal fatigue tester, mainly be made up of support (1), jacking system (2), control system (3), heating system (4) and cooling system (5), cooling system (5), heating system (4), control system (3) and jacking system (2) place on the support (1) from bottom to up successively; Support (1) is to be welded by angle bar, cooling system (5) is made up of the thermometer in tank and the insertion water, heating system (4) is made up of the thermopair in resistance furnace, slide (41) and the insertion stove, jacking system (2) is made up of motor (21), reducer casing (22) and wheel disc (23), and motor (21) is realized being in transmission connection by reducer casing (22) and wheel disc (23); It is characterized in that:
Control system (3) mainly by motor (21) rise time operation circuit, temperature retention time operation circuit, motor (21) operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit form:
The contact of time relay KT1 in motor (21) the rise time operation circuit in the supply line of temperature retention time operation circuit and electromagnet control timer KT5,
The contact of electromagnetic relay KE1 in motor (21) the rise time operation circuit is rotated in the forward motor (21) in the power circuit of motor (21);
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor (21) operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor (21) operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor (21) operation circuit fall time makes motor (21) reverse rotation in the power circuit of motor (21);
Cool time operation circuit the contact of time relay KT4 in motor (21) rise time operation circuit and in the cycle count circuit;
Electromagnet control timer KT5 in the slide operation circuit and the contact of KT6 are respectively in the power circuit of electromagnet EM1 and EM2;
The contact of the counter XK1 of cycle count circuit is in the major loop of control system (3).
Control the rising and the decline of motor (21) with the time relay, time relay minimum time unit is a millisecond, and this has increased the accuracy of control position again.
Control furnace temperature with thermopair, to increase accuracy of experimental results and reliability.
The water temperature of tank generally is controlled at 20 ± 10 ℃; Sample moves back and forth in tank, can increase the heat interchange of water in the tank.
Be provided with power switch K1 and/or K3, fuse F1 and/or F2 among the control system power circuit L1 of fatigue tester provided by the invention and the L2, be provided with hand switch K2 in the control circuit, be provided with hand switch K4 and K5 in the motor circuit.
In the fatigue tester provided by the invention, motor (21) has detent (25) or balance device.Detent (25) and balance device make motor (21) outage the time not take place to rotate voluntarily, in order to avoid sample shifts out in heating process that heating system (4) enters cooling system (5) or, the failure test standard.
Fatigue tester provided by the invention can be used for the high temperature sample and carry out instantaneous quenching, to observe the sample tissue at high temperature or the solution temperature of more definite phases.Can sample tissue morphology at high temperature be remained by instantaneous quenching, at room temperature observe sample tissue morphology at high temperature then.The purposes that another of quench hot is bigger is to be the solution temperature of γ ' phase in the very important accurate mensuration high temperature alloy concerning solution heat treatment.Because the height of solid solubility temperature is directly connected to the whether fully solid solution of γ ' phase, thereby remote effect are to the mechanical property of alloy.This solution temperature than γ ' phase that the DTA curve from alloy obtains is much accurate.
The cooling system of fatigue tester provided by the invention (5) is without tank, and with the air cooling, then can be used for cyclic oxidation test, with the antioxygenic property of experimental material.
The advantage of thermal fatigue tester provided by the invention is: full automation, flexible operation, accurate positioning are reliable, to obtain normalized test findings.
Description of drawings:
Fig. 1 is the structural representation of thermal fatigue tester;
Fig. 2 is the sketch of jacking system;
Fig. 3 is the control system circuit diagram.
Embodiment:
Embodiment 1
The structural representation of thermal fatigue tester as shown in Figure 1, mainly be made up of support (1), jacking system (2), control system (3), heating system (4) and cooling system (5), cooling system (5), heating system (4), control system (3) and jacking system (2) place on the support (1) from bottom to up successively;
Support (1) is to be welded by angle bar,
Cooling system (5) is made up of the thermometer in tank and the insertion water,
Heating system (4) is made up of the thermopair in resistance furnace, slide (41) and the insertion stove,
Jacking system (2) (see figure 2) is made up of motor (21), reducer casing (22) and the wheel disc (23) of band brake (25), and motor (21) is realized being in transmission connection by reducer casing (22) and wheel disc (23);
Control system (3) (see figure 3) mainly by motor (21) rise time operation circuit, temperature retention time operation circuit, motor (21) operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit form:
The contact of time relay KT1 in motor (21) the rise time operation circuit in the supply line of temperature retention time operation circuit and electromagnet control timer KT5,
The contact of electromagnetic relay KE1 in motor (21) the rise time operation circuit is rotated in the forward motor (21) in the power circuit of motor (21);
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor (21) operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor (21) operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor (21) operation circuit fall time makes motor (21) reverse rotation in the power circuit of motor (21);
Cool time operation circuit the contact of time relay KT4 in motor (21) rise time operation circuit and in the cycle count circuit; Electromagnet control timer KT5 in the slide operation circuit and the contact of KT6 are respectively in the power circuit of electromagnet EM1 and EM2;
The contact of the counter XK1 of cycle count circuit is in the major loop of control system (3).
Control the rising and the decline of motor (21) with the time relay, time relay minimum time unit is a millisecond, to have increased the accuracy of control position.
Control furnace temperature with thermopair, to increase accuracy of experimental results and reliability.
The water temperature of tank generally is controlled at 20 ± 10 ℃; Sample moves back and forth in tank, can increase the heat interchange of water in the tank.
The operation of thermal fatigue tester is as follows:
Closed power switch K1;
Forward transmission time relay KT1 and electromagnetic relay KE1 connect, the contact of electromagnetic relay KE1 starts kinematic train, sample is sent into heating system, after forward transmission time relay KT1 reaches the stipulated time, its contact disconnects electromagnetic relay KE1, and connection relay K T2 heat time heating time and electromagnet control timer KT5.Electromagnet control timer KT5 makes electromagnet EM1 energising, closes the sliding gate of heating system.
Heating system heats sample under the control of relay K T2 heat time heating time, reaching regulation after heat time heating time, heat time heating time relay K T2 contact, turn-on reversal transmission time relay KT3 and electromagnet control timer KT6, electromagnet control timer KT6 makes electromagnet EM2 energising, open the sliding gate of heating system, and time relay KT3 connects electromagnetic relay KE2;
The contact of electromagnetic relay KE2 starts kinematic train, and sample is sent into cooling system, and after reverse drive time relay KT3 reached the stipulated time, its contact was connected relay K T4 cool time, and disconnects electromagnetic relay KE2;
Cool time, relay K T4 controlled cool time, was reaching regulation after cool time, and cool time, relay K T4 made cycle counter XK1 counting once, and triggered forward transmission time relay KT1 and carry out next circulation;
Electromagnet control timer KT5 in the slide operation circuit and the contact of KT6 are respectively in the power circuit of electromagnet EM1 and EM2;
Reach the number of times of defined as cycle counter XK1 after, the contact of cycle counter XK1 disconnects the control system major loop, and whole test finishes.
Can disconnect control system and motor M with hand switch K2 when emergent.
Power switch K3 and fuse F2 are arranged in the power circuit of electromagnet EM1 and EM2.
Hand switch K4 and K5 are used for regulating before on-test the position of sample.
Can disconnect control system (3) and motor (21) M with hand switch K2 when emergent.
Claims (3)
1, a kind of thermal fatigue tester, mainly by support (1), jacking system (2), control system (3), heating system (4) and cooling system (5) are formed, cooling system (5), heating system (4), control system (3) and jacking system (2) place on the support (1) from bottom to up successively, support (1) is to be welded by angle bar, cooling system (5) is made up of the thermometer in tank and the insertion water, heating system (4) is by resistance furnace, slide (41) and the thermopair that inserts in the stove are formed, jacking system (2) is by motor (21), reducer casing (22) and wheel disc (23) are formed, motor (21) is realized being in transmission connection by reducer casing (22) and wheel disc (23), and it is characterized in that: control system (3) is mainly by motor (21) rise time operation circuit, the temperature retention time operation circuit, motor (21) operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit are formed:
The contact of time relay KT1 in motor (21) the rise time operation circuit in the supply line of temperature retention time operation circuit and electromagnet control timer KT5,
The contact of electromagnetic relay KE1 in motor (21) the rise time operation circuit is rotated in the forward motor (21) in the power circuit of motor (21);
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor (21) operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor (21) operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor (21) operation circuit fall time makes motor (21) reverse rotation in the power circuit of motor (21);
Cool time operation circuit the contact of time relay KT4 in motor (21) rise time operation circuit and in the cycle count circuit;
Electromagnet control timer KT5 in the slide operation circuit and the contact of KT6 are respectively in the power circuit of electromagnet EM1 and EM2.
The contact of the counter XK1 of cycle count circuit is in the major loop of control system (3).
2, according to the described thermal fatigue tester of claim 1, it is characterized in that: in the power circuit L1 of control system and L2, be provided with power switch K1 and/or K3, fuse F1 and/or F2, be provided with hand switch K2 in the control circuit, be provided with hand switch K4 and K5 in the motor circuit.
3, according to the described fatigue test method of claim 1, it is characterized in that: described motor (21) has detent (25) or balance device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101004519A CN100451604C (en) | 2004-12-23 | 2004-12-23 | Thermal fatigue tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101004519A CN100451604C (en) | 2004-12-23 | 2004-12-23 | Thermal fatigue tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1796970A true CN1796970A (en) | 2006-07-05 |
| CN100451604C CN100451604C (en) | 2009-01-14 |
Family
ID=36818183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101004519A Expired - Fee Related CN100451604C (en) | 2004-12-23 | 2004-12-23 | Thermal fatigue tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100451604C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331436A (en) * | 2011-07-06 | 2012-01-25 | 上海林频仪器股份有限公司 | Two-box type temperature impact test box |
| CN102445463A (en) * | 2011-09-30 | 2012-05-09 | 泉州师范学院 | Simple thermal fatigue testing machine |
| CN102607979A (en) * | 2012-03-30 | 2012-07-25 | 扬州大学 | Vacuum glass thermal cycling fatigue test device |
| CN102768158A (en) * | 2012-05-28 | 2012-11-07 | 南京工业大学 | Automatic tester for thermal shock resistance of ceramic material |
| CN102981527A (en) * | 2012-11-19 | 2013-03-20 | 苏州市职业大学 | Intelligent temperature control system applied to thermal fatigue test |
| CN103245583A (en) * | 2013-04-07 | 2013-08-14 | 上海交通大学 | Device and method for rapidly evaluating service life of heating element |
| CN103278414A (en) * | 2013-05-10 | 2013-09-04 | 沈阳工业大学 | Thermal fatigue testing machine |
| CN103293076A (en) * | 2012-03-05 | 2013-09-11 | 东莞市伟煌试验设备有限公司 | Lifting type cold-hot impact tester |
| CN103543079A (en) * | 2013-10-29 | 2014-01-29 | 苏州市职业大学 | Alternation cooling thermal fatigue test bench |
| CN104034599A (en) * | 2014-05-20 | 2014-09-10 | 北京航空航天大学 | Experiment system for testing super-high temperature fatigue S-N curve of engine material |
| KR101533939B1 (en) * | 2014-12-24 | 2015-07-06 | 성균관대학교산학협력단 | Thermal fatigue tester |
| CN105758758A (en) * | 2016-02-29 | 2016-07-13 | 江苏科技大学 | Thermal fatigue testing machine |
| CN106680308A (en) * | 2017-02-23 | 2017-05-17 | 四川大学 | Atmosphere laser heating in-situ thermal shock/fatigue test device |
| CN106769060A (en) * | 2016-12-08 | 2017-05-31 | 中国北方发动机研究所(天津) | A kind of rotatable thermal load test platform supporting mechanism |
| CN109557124A (en) * | 2019-01-21 | 2019-04-02 | 上海交通大学 | A kind of pneumatic visualization device of crash-proof fuel rod quenching experiment |
| CN109827893A (en) * | 2018-12-30 | 2019-05-31 | 浙江众泰汽车制造有限公司 | A kind of high temperature resistant fatigue rig |
| CN111157566A (en) * | 2020-01-03 | 2020-05-15 | 北京科技大学 | Multifunctional full-automatic material thermal fatigue testing machine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893536A (en) * | 2010-07-13 | 2010-11-24 | 浙江大学 | Heated structural member thermal shock and thermal fatigue test stand |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5980103A (en) * | 1995-10-24 | 1999-11-09 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Apparatus and method for testing thermal fatigue resistance |
| JPH09189651A (en) * | 1996-01-08 | 1997-07-22 | Hitachi Ltd | Device for thermal fatigue test in pure water |
| JP2002340765A (en) * | 2001-05-14 | 2002-11-27 | Hitachi Ltd | Equipment for evaluating/testing thermal fatigue lifetime |
| CN2553367Y (en) * | 2002-06-11 | 2003-05-28 | 江苏省竹箦机械厂 | Mechanical device of water tap cold-hot fatigue testing machine |
-
2004
- 2004-12-23 CN CNB2004101004519A patent/CN100451604C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331436A (en) * | 2011-07-06 | 2012-01-25 | 上海林频仪器股份有限公司 | Two-box type temperature impact test box |
| CN102445463A (en) * | 2011-09-30 | 2012-05-09 | 泉州师范学院 | Simple thermal fatigue testing machine |
| CN103293076A (en) * | 2012-03-05 | 2013-09-11 | 东莞市伟煌试验设备有限公司 | Lifting type cold-hot impact tester |
| CN102607979A (en) * | 2012-03-30 | 2012-07-25 | 扬州大学 | Vacuum glass thermal cycling fatigue test device |
| CN102607979B (en) * | 2012-03-30 | 2013-10-02 | 扬州大学 | Vacuum glass thermal cycling fatigue test device |
| CN102768158A (en) * | 2012-05-28 | 2012-11-07 | 南京工业大学 | Automatic tester for thermal shock resistance of ceramic material |
| CN102981527B (en) * | 2012-11-19 | 2015-10-28 | 苏州市职业大学 | A kind of intelligent temperature control system being applied to thermal fatigue test |
| CN102981527A (en) * | 2012-11-19 | 2013-03-20 | 苏州市职业大学 | Intelligent temperature control system applied to thermal fatigue test |
| CN103245583A (en) * | 2013-04-07 | 2013-08-14 | 上海交通大学 | Device and method for rapidly evaluating service life of heating element |
| CN103278414A (en) * | 2013-05-10 | 2013-09-04 | 沈阳工业大学 | Thermal fatigue testing machine |
| CN103278414B (en) * | 2013-05-10 | 2015-04-08 | 沈阳工业大学 | Thermal fatigue testing machine |
| CN103543079A (en) * | 2013-10-29 | 2014-01-29 | 苏州市职业大学 | Alternation cooling thermal fatigue test bench |
| CN104034599A (en) * | 2014-05-20 | 2014-09-10 | 北京航空航天大学 | Experiment system for testing super-high temperature fatigue S-N curve of engine material |
| KR101533939B1 (en) * | 2014-12-24 | 2015-07-06 | 성균관대학교산학협력단 | Thermal fatigue tester |
| CN105758758A (en) * | 2016-02-29 | 2016-07-13 | 江苏科技大学 | Thermal fatigue testing machine |
| CN105758758B (en) * | 2016-02-29 | 2019-03-29 | 江苏科技大学 | A kind of thermal fatigue tester |
| CN106769060A (en) * | 2016-12-08 | 2017-05-31 | 中国北方发动机研究所(天津) | A kind of rotatable thermal load test platform supporting mechanism |
| CN106680308A (en) * | 2017-02-23 | 2017-05-17 | 四川大学 | Atmosphere laser heating in-situ thermal shock/fatigue test device |
| CN109827893A (en) * | 2018-12-30 | 2019-05-31 | 浙江众泰汽车制造有限公司 | A kind of high temperature resistant fatigue rig |
| CN109557124A (en) * | 2019-01-21 | 2019-04-02 | 上海交通大学 | A kind of pneumatic visualization device of crash-proof fuel rod quenching experiment |
| CN111157566A (en) * | 2020-01-03 | 2020-05-15 | 北京科技大学 | Multifunctional full-automatic material thermal fatigue testing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100451604C (en) | 2009-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1796970A (en) | Thermal fatigue tester | |
| CN101300420B (en) | Method for prolonging and/or controlling lifetime of one or more heating and/or passive components of wind turbine, wind turbine and use thereof | |
| CN103341586B (en) | Method for achieving forming of GH4738 nickel-base superalloy turbine discs | |
| WO2013177860A1 (en) | Automatic tester for thermal shock resistance of ceramic material | |
| KR101199253B1 (en) | Thermal gradient fatigue test apparatus for multi-specimen | |
| CN108411230B (en) | A kind of enhancing polycrystalline Ni3The heat treatment method of Al based high-temperature alloy thermal fatigue property | |
| US11644382B2 (en) | High-temperature biaxial strength tester for ceramic matrix composite (CMC) turbine vane and test method thereof | |
| CN100439897C (en) | Thermal fatigue test method | |
| Lancaster et al. | A review of thermo-mechanical fatigue behaviour in polycrystalline nickel superalloys for turbine disc applications | |
| CN2763796Y (en) | Control system heat fatigue test | |
| CN113061709B (en) | Design method of gradient heat treatment furnace with accurately controllable temperature gradient and double-tissue disc piece | |
| CN104807713A (en) | Efficient thermal shock joint performance test device for blade coating layer of gas turbine | |
| WO2019160575A2 (en) | Induction heating for assembly and disassembly of the components in a turbine engine | |
| CN101003849B (en) | Method for heat treating a serviced turbine part | |
| RU2358134C2 (en) | Gas turbine plant | |
| US10240608B2 (en) | TiAl alloy, in particular for turbocharger applications, turbocharger component, turbocharger and method for producing the TiAl alloy | |
| CN109386322A (en) | A kind of automatic barring gear and control method | |
| CN205402840U (en) | Heating power can smoke ventilator | |
| CN1296690C (en) | Method of shortening reliability test time of refrigerating and warming air conditioner | |
| Carlsen et al. | 40 kW Stirling engine for solid fuel | |
| CN107525762A (en) | A kind of experimental rig and method of the adhesiveness for testing metal surface thermally grown oxide film | |
| CN101705346B (en) | Heat treatment method for improving hardness of ZG270-500 eccentric body | |
| CN117491180A (en) | Thermal mechanical fatigue test device capable of rapidly increasing and decreasing temperature | |
| CN108318337B (en) | High-temperature aging treatment process for novel ferrite heat-resistant steel for thermal power plant | |
| SU111033A1 (en) | Installation for testing thermal fatigue core samples |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20100125 |