CN102735561A - Cylinder head thermal shock test bench based on pre-tightening force, and method thereof - Google Patents
Cylinder head thermal shock test bench based on pre-tightening force, and method thereof Download PDFInfo
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Abstract
The present invention discloses a cylinder head thermal shock test bench based on pre-tightening force, and a method thereof. The test bench comprises a test apparatus and a control system, wherein the test apparatus comprises a cylinder head requiring detection, bolts, a valve mechanism, infrared heaters, an insulation pad, a cylinder gasket, a sense heating coil, a pseudo body, a fixing table stand, a sense heater control system, an infrared heater control system, a water pump, a water tank, a heater, a thermostat, and the like. The cylinder head requiring detection is additionally provided with the valve mechanism. The cylinder head requiring detection, the insulation pad, the cylinder gasket and the pseudo body are sequentially connected, and are fixed with the bolts. The front side and the rear side of the cylinder head requiring detection are provided with the infrared heaters. The sense heating coil is arranged inside the pseudo body. The cylinder head requiring detection is connected with the water tank through a water pipe and is driven by the water pump. Forced water cooling is performed on the cylinder head requiring detection. The test apparatus is controlled by the control system. With the present invention, the pre-tightening force is considered as the mechanical constraint, such that the actual working conditions can be simulated realistically, and the thermal fatigue state and the thermal shock state of the cylinder head can be accurately analyzed so as to improve the credibility of the test results.
Description
Technical field
The present invention relates to consider the pretightning force Heat Shock Test Bench, relate in particular to a kind of cylinder cap Heat Shock Test Bench and method thereof of considering pretightning force.
Background technology
Along with popularizing and development of technology such as improving constantly of engine reinforcing degree, particularly supercharging, the thermal load of engine cylinder cover and mechanical load problem become increasingly conspicuous, and directly have influence on the functional reliability and the serviceable life of complete machine.In engine working process, heating parts such as cylinder cap bear the dual test of alternation thermal load and the mechanical load that caused by the pretightning force constraint mostly simultaneously, than being easier to occur hot tearing, burning phenomenon.The combined action and the influence of factors such as the main heat fatigue of the reliability of cylinder cap, thermal shock, high-temerature creep and mechanical fatigue; The inevitable fine crack that cylinder cap exists in casting process can be in alternating thermal stress and Machine Movement Process; Generation stress is concentrated; And then near fire power face side or firepower surface, crack, and progressively expansion so that fracture, the reliability of serious threat internal combustion engine and security.How to take all factors into consideration the various factors influence, the coupling effect of on the basis of temperature field and thermal stress, taking all factors into consideration various mechanical stresses has become the focus of present engine design.
The main stress that pretightning force receives under nominal situation as cylinder cap, its big young pathbreaker produces the influence of can not ignore to the mission life of cylinder cap.When the engine cylinder cover bolt pretightening is too small, cylinder cap is caused because not pressing tightly the cylinder pad from the gas leakage of cylinder pad, leakage of oil, and reduce the ratio of compression of engine, make dynamic property, economy, the functional reliability of engine descend.When pretightning force is excessive, make bolt produce permanent stretcher strain easily, pretightning force descends on the contrary, even causes slide fastener or the phenomenon that fractures, and cylinder body screw thread subject to damage, thereby influences the sealing of cylinder body and body.
The experimental study in advance of gas engine part is the basic of internal combustion engine product development.The thermal shock simulation test is the temperature field of simulation heated part, analyzes one of effective means of its maximum thermal stress that can bear, thermal strain and thermal fatigue life.And the more performance of the damage problem of cylinder cap, has only and simulates the cylinder cap temperature field truly so the thermal shock simulation test is the important method of research cylinder cap reliability because the thermal load that parts bore produces, and could accurately estimate its heat resistanceheat resistant load performance.Therefore the ripe complete thermal shock test system of design draws the cylinder cap heat fatigue, the thermal shock process that meet under the actual condition, has become the another big important topic of Hyundai Motor industry.But, present component structural intensity research aspect, pretightning force only is applied to detecting in the mechanical fatigue of gas engine part, in thermal modeling test, do not relate to, and engine cylinder head system must bear pretightning force under nominal situation.This ignoring to the pretightning force influence; Can cause and actual condition between error; Thermal deformation exerts an influence to parts in finite element simulation calculates, also to have found the constraint of pretightning force; Therefore, the constraint of ignoring pretightning force in the cylinder cap thermal shock simulation test procedure can reduce the confidence level of test findings greatly.
Based on above reason; The cylinder cap heat fatigue of consideration pretightning force, the development of thermal shock test system are for simulating actual condition more realistically; Accurately research and analyse the hot state of cylinder cap, fill up the scientific research blind spot of present heat fatigue, thermal shock test system, to improving the design of cylinder cap; Improve internal combustion engine and other member functional reliability and overall performance, it is all significant to increase economic efficiency etc.
Summary of the invention
In order to solve deficiency of the prior art, the object of the present invention is to provide a kind of cylinder cap Heat Shock Test Bench and method thereof of considering pretightning force.
For solving this technical problem, technical scheme of the present invention is:
Consider the cylinder cap Heat Shock Test Bench of pretightning force; Comprise test unit and control system, wherein test unit comprises first rotary switch, cylinder cap to be measured, bolt, valve mechanism, infrared heater, heat insulating mattress, cylinder pad, load coil, false body, fixing with stand, induction heater control system, infrared heater control system, water pump, rising pipe, water tank, well heater, second rotary switch, electric wire, water inlet pipe, recirculatory pipe, first handle switch, entering water electromagnetic valve, second handle switch, temperature controller and thermopair; Install valve mechanism additional on the cylinder cap to be measured, cylinder cap to be measured, heat insulating mattress, cylinder pad, false body link to each other in order, and pass through bolt; Both sides are provided with infrared heater before and after the cylinder cap to be measured, are provided with load coil in the false body, and false body is placed on fixing with on the stand; Infrared heater links to each other with the infrared heater control system, is provided with well heater, temperature controller in the water tank, and well heater links to each other with Programmable Logic Controller through temperature controller; Water outlet of water tank links to each other with cylinder cap water inlet to be measured through rising pipe, and rising pipe is provided with water pump, first rotary switch, and the water tank recirculatory pipe links to each other with cylinder cap water delivering orifice to be measured; Moisture from water inlet pipe is two-way, and one the tunnel leads to load coil, and another road is through first handle switch, entering water electromagnetic valve control; Flow into water tank, overflow pipe is divided into two-way, and one the tunnel leads to the gap of water tank upper end; Another road is connected to the water tank lower end through the second handle switch, and load coil links to each other with the induction heater control system through electric wire, and load coil links to each other with the water tank refluxing opening through recirculatory pipe; On water inlet pipe, be provided with second rotary switch, the thermopair that cylinder cap to be measured is provided with, thermopair is connected to the testing table control system successively through signal wire; The induction heater control system links to each other with Programmable Logic Controller respectively with the infrared heater control system, and test unit is controlled by control system.
Described control system comprises temperature transmitter, an AD module, the 2nd AD module, the 3rd AD module, relay, Programmable Logic Controller, communication module, PC, printer, display; Programmable Logic Controller links to each other with an AD module, the 2nd AD module, the 3rd AD module, relay, communication module respectively; Temperature transmitter links to each other with an AD module, the 2nd AD module, the 3rd AD module respectively; Communication module links to each other with PC, and PC links to each other with printer, display.
The cylinder cap thermal shock test method of the consideration pretightning force of said testing table comprises the steps:
1) with 4 thermopairs be welded on respectively near the cylinder cap intake and exhaust to be measured doorway near near place, two sides, front and back, the atomizer, bridge of the nose district midway;
2) choose a block length and identical with the length of the cylinder cap to be measured respectively rectangular parallelepiped cast iron of the width dimensions body of playing tricks with width dimensions; Be cast with threaded hole carrying out the bolt junction with cylinder cap to be measured; Over against cylinder cap fire power face to be measured place, is end circle with the fire power face with false body middle part, and false body is punched with the right cylinder form; After installing heat insulating mattress, cylinder pad additional, be connected with cylinder cap to be measured with bolt;
3) on bolt, apply pretightning force with cylinder cap equal sizes to be measured;
4) select plane thread formula induction heating head, make two independently inductive coils of semi-circular canoe;
5) control model, test number, cylinder cap parameter to be measured, cycle index, basal temperature, cylinder cap heating-up temperature to be measured or heat time heating time, cylinder cap chilling temperature to be measured or cool time, cooling water temperature, data storage are set at interval on PC;
6) open infrared heater, be heated to the basal temperature of setting when cylinder cap to be measured after, the load coil energising; Continue heating cylinder cap to be measured, when the temperature that detects cylinder cap to be measured when thermopair reaches set the highest control temperature, or when reaching heat time heating time; Then Programmable Logic Controller sends signal, and the load coil outage starts pump working; Cylinder cap to be measured is cooled to basal temperature, or after reaching cool time, Programmable Logic Controller sends signal and switches off the pump immediately; Stop the chilled water circulation, so far accomplish the one action circulation; So repeat above-mentioned do action, until setting cycle index.
The present invention proposes the real machine checking system that can substitute present cylinder cap thermal shock test.Current stage particularly; Thermal modeling test is not all considered the influence of mechanical constraint, and the present invention has introduced pretightning force as mechanical constraint, can simulate actual condition more realistically; Accurately research and analyse heat fatigue, the thermal shock state of cylinder cap, thereby improve the confidence level of test findings.
Description of drawings
Fig. 1 is for considering the cylinder cap Heat Shock Test Bench structural representation of pretightning force;
Fig. 2 is an inductive coil canoe synoptic diagram of the present invention;
Fig. 3 is an induction heating synoptic diagram of the present invention;
Fig. 4 is a cooling synoptic diagram of the present invention;
Fig. 5 is a control system synoptic diagram of the present invention;
Among the figure: first rotary switch 1, cylinder cap to be measured 2, bolt 3, valve mechanism 4, infrared heater 5, heat insulating mattress 6, cylinder pad 7, load coil 8, false body 9, fixing with stand 10, induction heater control system 11, infrared heater control system 12, water pump 13, rising pipe 14, water tank 15, well heater 16, second rotary switch 17, electric wire 18, water inlet pipe 19, recirculatory pipe 20, first handle switch 21, entering water electromagnetic valve 22, second handle switch 23, temperature controller 24.
Embodiment
Like Fig. 1,3, shown in 4; The cylinder cap Heat Shock Test Bench of considering pretightning force comprises test unit and control system, and wherein test unit comprises first rotary switch 1, cylinder cap to be measured 2, bolt 3, valve mechanism 4, infrared heater 5, heat insulating mattress 6, cylinder pad 7, load coil 8, false body 9, fixing with stand 10, induction heater control system 11, infrared heater control system 12, water pump 13, rising pipe 14, water tank 15, well heater 16, second rotary switch 17, electric wire 18, water inlet pipe 19, recirculatory pipe 20, first handle switch 21, entering water electromagnetic valve 22, second handle switch 23, temperature controller 24 and thermopair;
Install valve mechanism 4 additional on the cylinder cap 2 to be measured, cylinder cap to be measured 2, heat insulating mattress 6, cylinder pad 7, false body 9 link to each other in order, and fixing through bolt 3; Both sides, cylinder cap to be measured 2 front and back are provided with infrared heater 5, are provided with load coil 8 in the false body 9, and false body 9 is placed on fixing with on the stand 10; Infrared heater 5 links to each other with infrared heater control system 12, is provided with well heater 16, temperature controller 24 in the water tank 15, and well heater 16 links to each other with Programmable Logic Controller through temperature controller 24; Water tank 15 water delivering orifices link to each other with cylinder cap 2 water inlets to be measured through rising pipe 14, and rising pipe 14 is provided with water pump 13, first rotary switch 1, and water tank 15 recirculatory pipes link to each other with cylinder cap 2 water delivering orifices to be measured; Moisture from water inlet pipe is two-way, and one the tunnel leads to load coil 8, and another road is through first handle switch 21, entering water electromagnetic valve 22 controls; Flow into water tank 15, overflow pipe is divided into two-way, and one the tunnel leads to the gap of water tank 15 upper ends; Another road is connected to water tank 15 lower ends through second handle switch 23; Load coil 8 links to each other with induction heater control system 11 through electric wire 18, and load coil 8 links to each other with water tank 15 refluxing openings through recirculatory pipe 20, on water inlet pipe 19, is provided with second rotary switch 17; The thermopair that cylinder cap 2 to be measured is provided with; Thermopair is connected to the testing table control system successively through signal wire, and induction heater control system 11 links to each other with Programmable Logic Controller respectively with infrared heater control system 12, and test unit is controlled by control system.
As shown in Figure 5, control system comprises temperature transmitter, an AD module, the 2nd AD module, the 3rd AD module, relay, Programmable Logic Controller, communication module, PC, printer, display; Programmable Logic Controller links to each other with an AD module, the 2nd AD module, the 3rd AD module, relay, communication module respectively; Temperature transmitter links to each other with an AD module, the 2nd AD module, the 3rd AD module respectively; Communication module links to each other with PC, and PC links to each other with printer, display.
The cylinder cap thermal shock test method of considering pretightning force comprises the steps:
1) with 4 thermopairs be welded on respectively near the cylinder cap to be measured 2 intake and exhaust doorways near near place, two sides, front and back, the atomizer, bridge of the nose district midway;
2) choose a block length and identical with the length of the cylinder cap 2 to be measured respectively rectangular parallelepiped cast iron of the width dimensions body 9 of playing tricks with width dimensions; Be cast with threaded hole carrying out the bolt junction with cylinder cap 2 to be measured; Over against cylinder cap to be measured 2 fire power face places, is end circle with the fire power face with false body 9 middle parts, and false body 9 is punched with the right cylinder form; After installing heat insulating mattress 6, cylinder pad 7 additional, be connected with cylinder cap 2 to be measured with bolt 3;
3) on bolt 3, apply pretightning force with cylinder cap 2 equal sizes to be measured;
4) select plane thread formula induction heating head, make two independently inductive coils of semi-circular canoe;
5) control model, test number, cylinder cap parameter to be measured, cycle index, basal temperature, cylinder cap heating-up temperature to be measured or heat time heating time, cylinder cap chilling temperature to be measured or cool time, cooling water temperature, data storage are set at interval on PC;
6) open infrared heater 5, after cylinder cap 2 to be measured is heated to the basal temperature of setting, load coil 8 energisings; Continue heating cylinder cap 2 to be measured, when the temperature that detects cylinder cap 2 to be measured when thermopair reaches set the highest control temperature, or when reaching heat time heating time; Then Programmable Logic Controller sends signal, and load coil 8 outages start water pump 13 work; Cylinder cap 2 to be measured is cooled to basal temperature, or after reaching cool time, Programmable Logic Controller sends signal and switches off the pump 13 immediately; Stop the chilled water circulation, so far accomplish the one action circulation; So repeat above-mentioned do action, until setting cycle index.
Consider the versatility and the simplicity of testing table; Having adopted the false body 9 that designs voluntarily to carry out bolt with cylinder cap 2 to be measured is connected; Like this when the cylinder cap that adopts different model carries out thermal shock test, size that can be through changing false body 9 and material are with the diversified requirement of adequacy test system.False body 9 be shaped as rectangular parallelepiped, be cast with the respective threads hole carrying out the bolt junction with cylinder cap 2 to be measured, be the firing chamber of simulation cylinder cap fire power face below, false body middle part is punched with the right cylinder form, in order to place load coil 8.Be simulating actual conditions more realistically; Between cylinder cap to be measured and false body, added cylinder pad 6; Between cylinder cap 2 to be measured and false body 9, add heat insulating mattress 6; Place on the cylinder pad 7, can completely cut off the heat transmission between cylinder cap fire power face and the false body like this, make fire power face in heating process, can reach the maximum temperature that test sets in the short period of time.
Consider the cylinder lid surface various ducts that distributing; Be unfavorable for the circulation of even heating and cooling water; Therefore on cylinder cap 2 to be measured, install valve mechanism 4 additional, so that the fire power face base closed, chilled water Inlet and outlet water duct is got through on two surfaces about cylinder cap to be measured; The cylinder cap water channel is directly led in inside, adopts seal pad to seal in the unnecessary duct of cylinder cap outside surface to be measured simultaneously.
Thermopair is used to gather the temperature value of each measuring point on the cylinder cap, as the major control signal of Heat Shock Test Bench.Can adopt K type thermopair to detect the cylinder cap temperature, 4 measuring points are installed.Thermopair is welded on the cylinder cap to be measured through thermopair welding appearance.
The thermocouple lead of each measuring point directly is connected on the temperature transmitter in the temperature transmitter case.Temperature transmitter converts the electromotive force of the thermopair on the cylinder cap standard two-wire system signal of 4～20mA into, imports on 4 general-purpose simulation amount load modules of PLC through twisted-pair feeder then.These load modules carry out the A/D conversion to the signal that imports into; Give PLC with test bit then; With the major control signal as Heat Shock Test Bench under the temperature model, all data are uploaded in the monitoring PC computing machine through the RS232 communication port and count database simultaneously, in order to post-processed.
The user can design the heating head shape of induction heater voluntarily according to cylinder cap type and test demand, to reach to the different heated perimeter of the heated part simulation of different cylinder caps and the purpose of heating intensity.This testing table is selected plane thread formula induction heating head for use, and the concrete canoe of coil can set up on their own according to cylinder cap type and test needs.For the heating efficiency of guaranteeing fire power face is tried one's best evenly; The inductive coil arrangement mode that this pilot system adopts is as shown in Figure 2; Be that two independently semi-circular canoes are connected in parallel, wherein the arrow indication is a direction of current, can not reduce the be heated fire power face of the whole cylinder cap to be measured of heating under the prerequisite of central part like this; Simultaneously the center of two back-shaped positions corresponding respectively two valve centers of cylinder cap, to reach this test demand.
Heat Shock Test Bench adopts the chilled water circulation that cylinder cap 2 to be measured is cooled off with load coil 8.Cylinder cap 2 left and right sides faces to be measured have been got through chilled water Inlet and outlet water duct, and cylinder cap water channel inner and to be measured communicates, and are connected with water tank 15 through water pipe, are driven recirculated water cooling under the simulation actual condition by water pump 13.Cooling water temperature can be provided with on temperature controller 24 before test voluntarily.Duration of test, temperature control system will remain cooling water temperature and be stabilized in and be provided with within ℃ scope of temperature ± 5.Constant for guaranteeing coolant water temperature, well heater 16, hot water gap and cold water water intaking valve have been installed in the water tank 15.Temperature controller 24 is according to thermal resistance signal, the action of control heater 16 and water intaking valve.Promptly, drive relay closes, make cooling water heater 16 energisings, the heating of the chilled waters in the water tank 15 when water temperature during than low 5 ℃ of set cooling water temperature; When water temperature during than high 5 ℃ of set cooling water temperature, drive the cold water water intaking valve and open, along with the adding of cold water, the hot water that is positioned at water tank 15 tops then automatically overflows along gap, thereby the cooling water temperatures in the water tank 15 are descended.Temperature control self-organizing system in the water tank 15 is by temperature controller 24 controls.The cooling synoptic diagram is as shown in Figure 4.
(1) first rotary switch 1, cylinder head cooling water flow control valve to be measured is used to regulate cylinder head cooling water flow to be measured, to regulate cooldown rate.
(2) second rotary switches 17, load coil 8 cooling water flow adjustable valves are used to regulate load coil 8 cooling water flows, to guarantee that load coil 8 fully cools off.
(3) the first handle switch 21, and the manual water intaking valve of cooling water tank 15 is used to test forward direction cooling water tank 15 and adds water, when gap has water to overflow, please close this valve.
(4) the second handle switch 23, cooling water tank 15 draining valves.When the time interval of twice test is longer, in order to prevent to produce scale, perhaps please after off-test, open this valve for antifreeze winter, drain the water in the water tank 15.
(5) well heater 16, and when water temperature was lower than design temperature in the water tank 15, well heater 16 was by temperature controller 24 control heating.
(6) entering water electromagnetic valve 22, and when water temperature in the water tank 15 surpassed design temperature, it was opened by temperature controller 24 controls, in water tank 15, charges into cold water, to keep water tank 15 temperature constant.
Carry out for warranty test safety, testing table can also be provided with following safety and warning device:
(1) cylinder cap temperature alarm.The highest control temperature that surpass to be provided with when heated cylinder lid surface temperature is more than 30 ℃, and when also not automatically switching to cooling procedure, safety and warning device warning, the action of closing the whole test system, and on PC, show fault category.Otherwise the cylinder lid surface or burn out thermopair of possibly ablating.
(2) induction heater cooling water channel hydraulic pressure is crossed low the warning.Hydraulic pressure is low excessively in cooling water pipeline, and is not enough to the intensity of cooling of induction heater, and safety and warning device are reported to the police, the action of closing the whole test system, and on PC, show fault category.
The control system synoptic diagram is as shown in Figure 5.The control of testing table and surveillance are used to realize automatic control and the supervision to process of the test.Its main components and parts comprise that PLC installs concentratedly in electrical control cabinet, and one of exterior arrangement is used for the PC of process monitoring and test figure recording processing.PLC is the MELSEC FX of a MIT series PLC, is used for signals collecting and to the control of testing table various piece.Relation between PC and the PLC is: in the process of the test, even close PC, but PLC operate as normal still, test is carried out as usual, and just data recording is interrupted.Control system adopts the upper and lower computer structure, and the PLC that higher reliability is arranged has complementary advantages as the control core, makes the simple easy operating of whole test and have very high stability and security.
At last; What more than announce only is embodiment of the present invention; Those of ordinary skill in the art can not be provided with cylinder cap Heat Shock Test Bench and the method thereof that thermopair only adopts the consideration pretightning force of temporal mode from all distortion as the cylinder cap 2 to be measured that content disclosed by the invention directly derives or associates, and should think within protection scope of the present invention yet.
Claims (3)
1. cylinder cap Heat Shock Test Bench of considering pretightning force; It is characterized in that comprising test unit and control system, wherein test unit comprises first rotary switch (1), cylinder cap to be measured (2), bolt (3), valve mechanism (4), infrared heater (5), heat insulating mattress (6), cylinder pad (7), load coil (8), false body (9), fixing with stand (10), induction heater control system (11), infrared heater control system (12), water pump (13), rising pipe (14), water tank (15), well heater (16), second rotary switch (17), electric wire (18), water inlet pipe (19), recirculatory pipe (20), first handle switch (21), entering water electromagnetic valve (22), second handle switch (23), temperature controller (24) and thermopair; Install valve mechanism (4) on the cylinder cap to be measured (2) additional, cylinder cap to be measured (2), heat insulating mattress (6), cylinder pad (7), false body (9) link to each other in order, and fixing through bolt (3); Both sides are provided with infrared heater (5) before and after the cylinder cap to be measured (2), are provided with load coil (8) in the false body (9), and false body (9) is placed on fixing with on the stand (10); Infrared heater (5) links to each other with infrared heater control system (12); Be provided with well heater (16), temperature controller (24) in the water tank (15), well heater (16) links to each other with Programmable Logic Controller through temperature controller (24), and water tank (15) water delivering orifice links to each other with cylinder cap to be measured (2) water inlet through rising pipe (14); Rising pipe (14) is provided with water pump (13), first rotary switch (1); Water tank (15) recirculatory pipe links to each other with cylinder cap to be measured (2) water delivering orifice, is two-way from the moisture of water inlet pipe, and one the tunnel leads to load coil (8); Another road is through first handle switch (21), entering water electromagnetic valve (22) control; Flow into water tank (15), overflow pipe is divided into two-way, and one the tunnel leads to the gap of water tank (15) upper end; Another road is connected to water tank (15) lower end through second handle switch (23); Load coil (8) links to each other with induction heater control system (11) through electric wire (18), and load coil (8) links to each other with water tank (15) refluxing opening through recirculatory pipe (20), on water inlet pipe (19), is provided with second rotary switch (17); The thermopair that cylinder cap to be measured (2) is provided with; Thermopair is connected to the testing table control system successively through signal wire, and induction heater control system (11) links to each other with Programmable Logic Controller respectively with infrared heater control system (12), and test unit is controlled by control system.
2. a kind of cylinder cap Heat Shock Test Bench of considering pretightning force according to claim 1; It is characterized in that described control system comprises temperature transmitter, an AD module, the 2nd AD module, the 3rd AD module, relay, Programmable Logic Controller, communication module, PC, printer, display; Programmable Logic Controller links to each other with an AD module, the 2nd AD module, the 3rd AD module, relay, communication module respectively; Temperature transmitter links to each other with an AD module, the 2nd AD module, the 3rd AD module respectively; Communication module links to each other with PC, and PC links to each other with printer, display.
3. one kind is used the cylinder cap thermal shock test method of the consideration pretightning force of testing table according to claim 1, it is characterized in that comprising the steps:
1) with 4 thermopairs be welded on respectively near cylinder cap to be measured (2) the intake and exhaust doorway near near place, two sides, front and back, the atomizer, bridge of the nose district midway;
2) choose a block length and identical with the length of cylinder cap to be measured (2) the respectively rectangular parallelepiped cast iron of the width dimensions body (9) of playing tricks with width dimensions; Be cast with threaded hole carrying out the bolt junction with cylinder cap to be measured (2); Over against cylinder cap to be measured (2) fire power face place, is end circle with the fire power face with false body (9) middle part, and false body (9) is punched with the right cylinder form; After installing heat insulating mattress (6), cylinder pad (7) additional, be connected with cylinder cap to be measured (2) with bolt (3);
3) on bolt (3), apply pretightning force with cylinder cap to be measured (2) equal sizes;
4) select plane thread formula induction heating head, make two independently inductive coils of semi-circular canoe;
5) control model, test number, cylinder cap parameter to be measured, cycle index, basal temperature, cylinder cap heating-up temperature to be measured or heat time heating time, cylinder cap chilling temperature to be measured or cool time, cooling water temperature, data storage are set at interval on PC;
6) open infrared heater (5), after cylinder cap to be measured (2) is heated to the basal temperature of setting, load coil (8) energising; Continue heating cylinder cap to be measured (2), when the temperature that detects cylinder cap to be measured (2) when thermopair reaches set the highest control temperature, or when reaching heat time heating time; Then Programmable Logic Controller sends signal, and load coil (8) outage starts water pump (13) work; Cylinder cap to be measured (2) is cooled to basal temperature, or after reaching cool time, Programmable Logic Controller sends signal switch off the pump immediately (13); Stop the chilled water circulation, so far accomplish the one action circulation; So repeat above-mentioned do action, until setting cycle index.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210202648.8A CN102735561B (en) | 2012-06-19 | 2012-06-19 | Cylinder head thermal shock test bench based on pre-tightening force, and method thereof |
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| CN103234739A (en) * | 2013-04-01 | 2013-08-07 | 中国北方发动机研究所(天津) | Apparatus and method for testing thermal fatigue of cylinder covers |
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| CN109839246A (en) * | 2017-11-29 | 2019-06-04 | 丰田合成株式会社 | The Withstand test device of inflator container |
| CN107860785A (en) * | 2017-12-08 | 2018-03-30 | 广西玉柴机器股份有限公司 | A kind of quick thermal fatigue test method of engine cylinder cap and device |
| CN109060578A (en) * | 2018-09-06 | 2018-12-21 | 潍坊思博精工科技有限公司 | A kind of diesel engine cylinder head heat fatigue test device |
| CN109060578B (en) * | 2018-09-06 | 2023-10-27 | 潍坊思博精工科技有限公司 | Thermal fatigue testing device for cylinder cover of diesel engine |
| CN109253940A (en) * | 2018-10-12 | 2019-01-22 | 南昌航空大学 | A kind of experimental provision for turbo blade material heat fatigue |
| CN109738320A (en) * | 2019-01-23 | 2019-05-10 | 重庆理工大学 | A kind of quick thermal fatigue test device and method of electromagnetic induction heating type |
| CN109738322A (en) * | 2019-01-23 | 2019-05-10 | 重庆理工大学 | The quick thermal fatigue test device of electric iron heated type and experimental method |
| CN109738320B (en) * | 2019-01-23 | 2021-07-20 | 重庆理工大学 | Electromagnetic induction heating type rapid thermal fatigue experimental device and method |
| CN110426306A (en) * | 2019-08-31 | 2019-11-08 | 山东省计量科学研究院 | Household heater glass panel is resistant to thermal shock rig |
| CN110426306B (en) * | 2019-08-31 | 2024-03-26 | 山东省计量科学研究院 | Device for testing heat shock resistance of glass panel of indoor heater |
| CN112730137A (en) * | 2020-12-29 | 2021-04-30 | 中国神华能源股份有限公司国华电力分公司 | Material test integrated platform system of generator set and test method thereof |
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