CN2763796Y - Control system heat fatigue test - Google Patents
Control system heat fatigue test Download PDFInfo
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- CN2763796Y CN2763796Y CN 200420120688 CN200420120688U CN2763796Y CN 2763796 Y CN2763796 Y CN 2763796Y CN 200420120688 CN200420120688 CN 200420120688 CN 200420120688 U CN200420120688 U CN 200420120688U CN 2763796 Y CN2763796 Y CN 2763796Y
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 14
- 208000025599 Heat Stress disease Diseases 0.000 title abstract description 12
- 230000014759 maintenance of location Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000000630 rising effect Effects 0.000 abstract 3
- 238000010438 heat treatment Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides a control system used for heat fatigue tests, which is mainly composed of a motor rising circuit, a holding time circuit, a motor falling circuit, a cooling time circuit, a sliding door control circuit, a cycle counting circuit and other circuits, wherein the contact point of a time relay of the motor rising circuit is arranged in the holding time circuit and an electromagnet relay power supplying circuit for closing a sliding door; the contact point of a time relay in the holding time circuit is arranged in the motor falling circuit and an electromagnet relay power supplying circuit for opening the sliding door; the contact point of a time relay in the motor falling circuit is arranged in the cooling time circuit; the contact point of a time relay in the cooling time circuit is arranged in the motor rising circuit and the counting circuit; the contact point of a counter is arranged in a main circuit. The utility model has the advantages that the heat fatigue test can accomplish full automation, flexible operation and accurate and reliable positioning so as to attain normalized test results, and the utility model has the advantages of flexible operation and accurate and reliable position.
Description
Technical field:
The utility model relates to 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, 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.Therefore wheel disc causes circumferential thermal stress because wheel hub and wheel rim radially produce the very big temperature difference outside wheel rim, cause wheel disc 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 control system that the purpose of this utility model is to provide a kind of full automatic, flexible operation, the reliable thermal fatigue test of accurate positioning to use
The control system that the utility model provides a kind of thermal fatigue test to use is characterized in that: mainly by motor rise time operation circuit, temperature retention time operation circuit, motor operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit form:
The contact of time relay KT1 in the motor 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 the motor rise time operation circuit is rotated in the forward motor in the power circuit of motor;
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor operation circuit fall time makes the motor reverse rotation in the power circuit of motor;
Cool time operation circuit the contact of time relay KT4 in motor 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.
Be provided with power switch K1 and/or K3, fuse F1 and/or F2 among the power circuit L1 of the control system that the thermal fatigue test that the utility model provides is used 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.
The thermal fatigue test that the utility model provides is with the advantage of control system: make thermal fatigue test realize that full-automation, flexible operation, accurate positioning are reliable, to obtain normalized test findings.
Description of drawings:
Fig. 1 is the control system circuit diagram.
Embodiment:
The circuit diagram of control system as shown in Figure 1.Control system by motor rise time operation circuit, temperature retention time operation circuit, motor operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit form:
The contact of time relay KT1 in the motor 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 the motor rise time operation circuit is rotated in the forward motor in the power circuit of motor;
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor operation circuit fall time makes the motor reverse rotation in the power circuit of motor;
Cool time operation circuit the contact of time relay KT4 in motor 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.
Job step 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.
Claims (2)
1, the control system used of a kind of thermal fatigue test is characterized in that: mainly by motor rise time operation circuit, temperature retention time operation circuit, motor operation circuit fall time, cool time operation circuit, slide operation circuit and cycle count circuit form:
The contact of time relay KT1 in the motor 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 the motor rise time operation circuit is rotated in the forward motor in the power circuit of motor;
The contact of the time relay KT2 of temperature retention time operation circuit is in the supply line of motor operation circuit fall time and electromagnet control timer KT6;
The contact of time relay KT3 in motor operation circuit fall time in the cool time operation circuit,
The contact of electromagnetic relay KE2 in motor operation circuit fall time makes the motor reverse rotation in the power circuit of motor;
Cool time operation circuit the contact of time relay KT4 in motor 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.
2, the control system of using according to the described thermal fatigue test of claim 1, it is characterized in that: in power circuit L1 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420120688 CN2763796Y (en) | 2004-12-23 | 2004-12-23 | Control system heat fatigue test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420120688 CN2763796Y (en) | 2004-12-23 | 2004-12-23 | Control system heat fatigue test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2763796Y true CN2763796Y (en) | 2006-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420120688 Expired - Fee Related CN2763796Y (en) | 2004-12-23 | 2004-12-23 | Control system heat fatigue test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105842570A (en) * | 2016-06-03 | 2016-08-10 | 句容市博远电子有限公司 | Liquid cold and thermal shock device |
-
2004
- 2004-12-23 CN CN 200420120688 patent/CN2763796Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105842570A (en) * | 2016-06-03 | 2016-08-10 | 句容市博远电子有限公司 | Liquid cold and thermal shock device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |