CN105372072A - Constant volume combustion bomb and combustion device with same - Google Patents
Constant volume combustion bomb and combustion device with same Download PDFInfo
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- CN105372072A CN105372072A CN201510633340.2A CN201510633340A CN105372072A CN 105372072 A CN105372072 A CN 105372072A CN 201510633340 A CN201510633340 A CN 201510633340A CN 105372072 A CN105372072 A CN 105372072A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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Abstract
The invention provides a constant volume combustion bomb. The constant volume combustion bomb comprises a bomb body which is internally provided with a cavity serving as a combustion cavity and is in the shape of a cube. The bomb body has six working surfaces serving as main mounting surfaces and auxiliary mounting surfaces formed at eight corners. The main mounting surfaces and the auxiliary mounting surfaces are provided with main mounting holes and auxiliary mounting holes. The constant volume combustion bomb further comprises a main mounting base accommodated in two opposite main mounting holes, a glass mounting base accommodated in another two opposite main mounting holes, a magnetic coupling fan accommodated in the last two opposite main mounting holes and used for driving mixed gas in the combustion cavity of the bomb body rotationally to make the mixed gas form a vortex, and auxiliary mounting bases accommodated in the auxiliary mounting holes to measure the pressure and temperature in the combustion cavity of the bomb body. The invention also provides the corresponding combustion system. The device has a structure adaptive to the combustion conditions of an internal combustion engine, allows comprehensive observation of a combustion process and thus is suitable for premixed combustion heating type constant volume bomb spray combustion diagnosis experiments with various research requirements.
Description
Technical field
The present invention relates to combustion in IC engine technical field, be specifically related to a kind of premixed combustion heated type constant volume combustion bomb and there is the burner of this constant volume combustion bomb.
Technical background
Improving engine cylinder combustion process is the importance reducing discharge, improve diesel engine performance.Due to the actual ejection of engine be atomized, spread, evaporate, burn, the process such as heat transfer is very complicated, and is attended by cyclical variations, comparatively difficult to the control of environmental baseline, and not easily carries out observational study.Therefore, the combustion research of internal combustion engine carries out mostly on visual Simulation experimental provision.
For the effect of research cylinder of internal-combustion engine internal spraying burning, many employing constant volume combustion bomb experimental provisions.Hold firebomb and can be used for multiple theoretical research and practical application, be a kind of good engine combustion test research device, constant volume combustion bomb can be researched and analysed the combustion process of conventional fuel, alternate fuel, can the physical change process of analytic combustion process; Can study burning fire mechanism, carbon soot particles mechanism of production; The impact of gas with various environmental baseline (temperature, pressure, density, component etc.) on fuel spray penetration, macroscopic property such as atomization cone angle, liquid core length etc. can be studied; The impact on atomization, evaporation, combustion process and discharge of different model fuel injector, different orifice number, injection diameter and length-diameter ratio, different model fuel oil (composition, viscosity different), different oil spout temperature and injection pressure can be studied; Can cold conditions Fuel spray be carried out, also can carry out spray burning experimental study; Can be used for the Determination of Combustion Heat calculating certain fuel; Gaseous combustion experiment can be carried out, observation combustion flame propagation speed, Space Particle distribution etc.; Also can carry out burning autoluminescence experiment etc.
Patent documentation CN103278331A discloses a kind of for observing flame and the interactional CONSTANT VOLUME MODEL COMBUSTION CHAMBER of pressure wave, and its firebomb main body comprises body and optical observation window.Wherein, body is column type, and is provided with the viewport that shape is through hole; Optical observation window by outside have annular boss optical glass, embed end cap and compress end cap and form, and by embedding end cap and compressing on viewport that end cap to be arranged on by bolt on body.
But this device body is right cylinder, being only provided with a pair shape is the viewport of through hole, and observation optical path is comparatively single, comparatively comprehensively can not observe the process of body combustion; In addition, the optical glass of this device will be fabricated to outside and will have annular boss, and higher to the processing request of glass, add difficulty of processing, cost is higher; And this device adopts bolt presses, can make the optical glass unbalance stress of observation, easily make glass breakage, particularly, in its body, fan is not housed, make the combination gas eddy current in body not enough, do not meet existing combustion in IC engine condition.
Summary of the invention
For above defect or the Improvement requirement of prior art, the object of the invention is the burner providing a kind of constant volume combustion bomb and have this constant volume combustion bomb, it is by the installation of quartz window on body and sealing means, the structure of main mount pad and sealing means, the improvement of safety precautions and inflation method etc., and add magnetic coupling fan, thus obtain the structure adapting to combustion in IC engine condition, the complete observation to combustion process can be realized, and manufacturing process is simple, parts are reliable and stable, thus the premixed combustion heated type constant volume bullet spray burning diagnostic test of multiple Research Requirements can be adapted to.
For achieving the above object, according to one aspect of the present invention, provide a kind of constant volume combustion bomb, for the combustion simulation of internal combustion engine, it is characterized in that, this constant volume combustion bomb comprises:
Body, it has the cube structure of cavity as burning chamber for inner, this body has six workplaces using as main installed surface and be positioned at the secondary installed surface that eight drift angles process, wherein each described main installed surface and secondary installed surface all offer central through hole, using as main mounting hole and secondary mounting hole;
Main mount pad, it is contained in two main mounting holes positioned opposite, for installing fuel injector with to the burning chamber oil spout in body;
Glass mount pad, it is contained in other two main mounting holes positioned opposite, for the observation window of mounting glass as observation burning chamber combustion situation;
Magnetic coupling fan, it is contained in last two main mounting holes positioned opposite, makes it to form eddy current for the combination gas in rotary actuation body burning chamber; And
Submount, it is contained in described secondary mounting hole, is provided with sensor in it, for the pressure and temperature measured in body burning chamber.
As improvement of the present invention, described main mount pad comprise be enclosed within described main mounting hole and have step through-hole mute plug, be arranged on the oil injector seat in described mute plug step through-hole by bolt coaxial package, be provided with sealer between the two and by being threaded with described body for the main thread gland be fixed on by described mute plug on described body.
As improvement of the present invention, described glass mount pad comprises and is enclosed within described main mounting hole and has with the quartz glass holder of central through hole, the quartz glass be sleeved on the central through hole of this quartz glass holder, being fixed by screws in described quartz glass holder for the quartz glass cover plate be pressed on by described quartz glass in this quartz glass holder and by being threaded for the main thread gland compressed by described quartz glass cover plate with described body.
As improvement of the present invention, the central through hole of described quartz glass holder is horn-like, and the described quartz glass be sleeved on wherein is cone shape adaptively.
As improvement of the present invention, described quartz glass and glass mount pad affixed with the adhesion of oil-resistant high-temperature room curing silicon rubber.
As improvement of the present invention, described magnetic coupling fan comprises fan mount pad, driven revolving part, active rotation cover and spacer sleeve, wherein said fan mount pad one end is fixedly mounted on described burning body, the other end is for fixedly mounting fan electromotor, described active rotation cover to be coaxially fixed on the active rotation axle with fan electromotor output shaft fixed connection and synchronous rotary, described spacer sleeve coaxial sleeve active rotation cover in and with burning body be fixedly connected with, described driven revolving part coaxial sleeve is in this spacer sleeve and be fixedly connected with fan blade by slave drive axle, with synchronous axial system, the active magnetic main part be arranged on initiative drive shaft is driven to rotate from the fan electromotor outside cover, driven magnetic main part follows the rotation of active magnetic main part due to magneticaction, thus drive the driven turning axle be connected on driven revolving part to rotate, and then drive fan blade to rotate.
As improvement of the present invention, described Submount comprises sensor holder and sensor holder pad, and wherein said sensor holder coaxial package in described secondary mounting hole, and is fixed by screws on body, described sensor holder pad is arranged between sensor holder and burning body, for sealing.
As improvement of the present invention, the central axis of described each secondary mounting hole all intersects at body burning chamber center.
According to another aspect of the present invention, provide a kind of burner with above-mentioned constant volume combustion bomb.
According to another aspect of the present invention, a kind of burner with above-mentioned constant volume combustion bomb is provided, it is characterized in that, this burner also comprises automatically controlled gas distributing system, electronic control injection and firing system, and image and pressure acquisition system, wherein, the main draft tube of described automatically controlled gas distributing system, burning body valve and angle mount pad, it is communicated with burning body with angle mount pad via burning body valve by this main draft tube, for accurately controlling the air inflow of respective components gas in each branch air path, described electronic control injection is communicated with spark plug with the fuel injector in body with firing system, it is for realizing the sequential control of igniting and oil spout, final premixed combustion and the fuel injection processes realizing burning indoor fuel gas, described image and pressure acquisition system comprise and are arranged on glass vision panel on constant volume bullet and pressure transducer, be respectively used to gather burning cavity pressure and image information, to be fed back to automatically controlled gas distributing system and electronic control injection and firing system by controller process, for the open and close controlling parameter as distribution solenoid valve, and for electronic control injection Systematical control oil injection time.
In the present invention, burning body is designed to symmetrical cube structure, and cube six dominant plane arrange main mounting hole and locking screw.Cube eight angles process the secondary mounting hole pointing to cube center, in six main mounting holes, arranges the consistent main mount pad of contour structures and glass mount pad.According to the demand of measuring method, main installation bore can install 2 ~ 4 optical windows, flexible arrangement goes out linear pattern, perpendicular type and T-shaped isostructural light path, can also arrange the fuel injector of band oil bath system, the large scale parts such as exhaust fan and rupture disk.The consistent Submount of contour structures is arranged in eight secondary mounting holes.Then may be used in Submount hole on eight angles arranging the small parts such as spark plug, porting and pressure transducer.
In the present invention, mute plug is directly put in main mounting hole, and the outside of mute plug is processed with ring groove, main mount pad O type circle is put into ring groove, can play good sealing function after mute plug is compacted.Oil injector seat is arranged on beyond the Great Wall mute, and at the outside of oil injector seat processing annular ring, put into main mount pad O type circle, and compress with six M8 socket cap screws, every screw is equipped with one piece of M8 pad.Finally with main thread gland, mute plug is pressed on burning body.
In the present invention, glass mount pad is made up of quartz glass holder, quartz glass cover plate, quartz glass, main thread gland, M6 socket cap screw, M6 pad and quartz glass pad.Quartz glass holder is placed directly in main mounting hole, and the outside of quartz glass holder is processed with ring groove equally, glass mount pad O type circle put into ring groove directly with burning elastomer contact, seal.Cone-shaped quartz glass glass is arranged in quartz glass holder, and compressed by quartz glass cover plate, quartz glass cover plate uses eight M6 socket cap screws to be fixed in quartz glass holder, one piece of M6 pad joined by every M6 screw, wherein uses quartz glass pad to ensure sealing between quartz glass cover plate and quartz glass.Quartz glass and glass mount pad with oil-resistant high-temperature room curing silicon rubber RTV60 adhesion, to ensure the sealing of quartz glass and to play the stressed effect of buffering quartz glass.Meanwhile, this structure can avoid quartz glass directly and constant volume bullet body contact time sealing and safeguard and change a difficult problem.The contact face of quartz glass and glass cover-plate is district of going in ring.When quartz glass is subject to the immense pressure of high-temperature high-pressure fuel gas, provide equilibrant by this annulus.By changing glass cover-plate, suitably reducing effective area, annulus area can be increased, improve the maximum outbreak pressure that quartz glass can bear.
In the present invention, Submount is made up of sensor holder and sensor holder pad M6 socket cap screw and M6 pad.Sensor holder is directly fixed on burning body with six M6 socket cap screws, and one piece of M6 pad joined by each screw, uses sensor holder gasket seal between sensor holder and burning body.
In the present invention, adopt magnetic coupling fan, magnetic coupling fan is made up of with spacer sleeve internal rotor, outer rotor: internal rotor is connected fan blade, and outer rotor connects motor, uses complete spacer sleeve isolation between inner and outer rotors.Wherein spacer sleeve is directly fixed on burning body with six M6 socket cap screws, and one piece of M6 pad joined by each screw, uses spacer sleeve gasket seal between spacer sleeve and burning body.
In the present invention, firing system is made up of pen-type ignition coil and spark plug etc., the control inerface manual triggers ignition signal write by Labview.For avoiding the water vapor after acetylene combustion to condense at silica glass window, and reducing the temperature difference of body wall and combustion gas, on constant volume combustion bomb surface, silica gel heating plate and warming plate being installed, by body homogeneous heating to 383K.
In the present invention, Electrocontrolled high-pressure oil supply system is made up of drive motor, CP3.3 high-pressure oil pump, high-pressure common-rail pipe and independently developed control module etc.CP3.3 high-pressure oil pump inside is integrated with gear fuel supply pump ZP18 and fuel metering unit MeUN.During operation of oil pump, control system, by the pressure transducer Real-time Collection oil pressure on common rail pipe, accordingly control MeUN solenoid valve aperture, regulates the fuel delivery per cycle of high-pressure oil pump, realizes the control to oil pressure.The rated operating pressure of this fuel system is 160MPa.The common rail pipe surplus valve opening pressure detected by common rail pipe oil pressure sensor is 220MPa.Experiment shows, this fuel system can provide the stable oil pressure within 220MPa, can meet the demand of Europe V diesel spray combustion characteristics research.
In the present invention, Electrocontrolled high-pressure injection system is made up of Bosch CRIN2 current drive-type electric-controlled fuel injector, independently developed fuel injector driving control unit and host computer Injection Control program.The starting stage that oil spout triggers, the electric current that driving control unit provides peak value larger with 60V voltage to fuel injector solenoid, makes solenoid valve open rapidly under larger electromagnetic attraction.After solenoid valve is opened completely, voltage is adjusted to 24V by driving control unit, makes electric current in coil be reduced to certain level, keeps size of current subsequently, to maintain the opening of solenoid valve.Peak point current is larger, and solenoid valve opening speed is faster, and injection delay is less.Keep electric current to avoid coil to burn because electric current is excessive for a long time compared with I, when making end oil spout, solenoid valve is taken a seat rapidly simultaneously, stops oil spout response soon, ensures the accurate control to distributive value and injection timing.By the measured waveform of current clamp monitoring fuel injector solenoid drive current, its peak point current is about 24A, keeps electric current to be about 8A, and oil injection duration is 2ms.Electric current after oil spout triggers in coil rises to peak current time from 0A and is about 300 microseconds, and after power-off, coil current self-sustaining electric current is down to zero required time and is about 30 microseconds, reaches re-set target, effectively ensure that the accurate control to fuel injector.
In the present invention, fuel injector driving control unit is made up of power circuit, booster circuit, main driving circuit, current sample feedback circuit, single-chip microcomputer, logic control circuit (PWM ripple signal source), main circuit metal-oxide-semiconductor driving circuit (HF switch) etc.Drive current size is detected in real time by the LA25-NP Hall current sensor that main driving circuit is connected with solenoid, and compare with the drive current waveform preset by single-chip microcomputer, produce pwm signal, realize the high frequency break-make of main circuit, reach the object accurately controlling fuel injector drive current waveform.
Injection Control program work principle of the present invention is: driving circuit powers on, and master routine runs, and oil spout zone bit is set to 0, waits for that host computer sends oil spout trigger pip; After receiving the oil spout trigger pip that host computer sends, carry out keys interrupt process, when oil spout zone bit is 0, call Injection Control subroutine, commencement of fuel injection, in oil injection duration, oil spout zone bit is set to 1; After end of injection, is set to 2 by oil spout zone bit; Single spray terminates, and after experiencing minimum injection time interval, the zero setting again of oil spout zone bit, enters oil spout and trigger standby mode.
Fuel oil injector bath system of the present invention is made up of the oil injector seat with cooling oil jacket, cold oil discharge pump and cooling oil temperature Ore-controlling Role, can stablize and regulate fuel injector and fuel oil temperature, with the cooling jacket of simulated engine.Pressure acquisition system of the present invention is made up of Kistler pressure transducer, Kistler charge amplifier and NIUSB high-speed data acquisition card.This system in ignition and spray burning process, independent acquisition pressure data.
Image capturing system of the present invention is made up of schlieren and high-speed digital photography machine.Under the background that high-speed digital photography machine performance significantly promotes, the spatial and temporal resolution of high-speed schlieren method is increased dramatically.Schlieren can detect refractive index gradient, and refractive index gradient is caused by density gradient.For the spray burning process in constant volume combustion bomb, density gradient can be caused by thermograde, but is mainly caused by concentration gradient.In experimentation, the effect of schlieren is first to provide a branch of directional light (collimated light) to pass through measurand, converged again and be inducted into high-speed digital photography machine. when directional light is by spraying mist bundle, under the effect of drop and fuel vapor, can be refracted, reflect and absorption, in schlieren image, leave light and dark texture.Schlieren can also provide the temperature of spray burning process and component information: utilize schlieren can distinguish the border of fuel vapo(u)r and environmental gas, distinguishes the border of high-temperature fuel gas and low temperature unburned gas, can also collect the naturally luminous of spray burning.This seems particularly important to research spray evaporation mixed process and combustion process.
In general, the above technical scheme conceived by the present invention compared with prior art, has following beneficial effect: constant volume combustion bomb boundary condition of the present invention, starting condition be easy to control, based on research provide favourable experiment condition; Constant volume combustion bomb visualization is high, can be convenient to observation experiment and carry out image acquisition in conjunction with stration technique, high speed photography etc.; Before simulation oil spout, gas in the jar environmental field is wide, and gas temperature, pressure and exhaust gas recirculation rate are easy to accurately control and simulation; Assay reproducibility is high.Particularly, the present invention has following technical characterstic:
1) body that burns in the present invention is designed to cube structure and arranges main mounting hole on six face, and secondary mounting hole is provided with on eight angles, the cube structure of overall full symmetric, the position of spark plug, porting, exhaust fan, pressure transducer and glass mount pad etc. can be changed as required, thus form the constant volume combustion bomb device of difference in functionality.Use large-sized locking screw can ensure sealing surface uniform force, also make dismounting safeguard more convenient.
2) gas distributing system of the present invention adopts Closed-loop Control Strategy.The control inerface manual triggers ignition signal that firing system is write by Labview by pen-type ignition coil and spark plug etc.Silica gel heating plate and warming plate have been installed in constant volume combustion bomb surface, can ensure the temperature stabilization of constant volume bullet burning body.Electrocontrolled high-pressure injection system ensures the accurate control to distributive value and injection timing.
3) the present invention adopts high-speed figure schlieren method to obtain temperature and the component information of constant volume combustion bomb internal spraying combustion process: utilize schlieren can distinguish the border of fuel vapo(u)r and environmental gas, distinguish the border of high-temperature fuel gas and low temperature unburned gas, the naturally luminous of spray burning can also be collected.The development and change process of fuel spray in whole firing chamber can be observed.This seems particularly important to research spray evaporation mixed process and combustion process.
4) the present invention adopts fan Forced Mixing, makes combination gas can produce stronger turbulent flow, more close to the eddy current in air intake duct air inlet exhaust casing in internal combustion engine in burning body.Adopt magnetic coupling fan, initiatively use magnetic main part transferring energy between driving member and slave drive part, use dividing plate to separate between two driving members, make physical contact between driving member, avoid pressure and temperature higher time combination gas leakage.
Accompanying drawing explanation
Fig. 1 is overall system structure schematic diagram of the present invention;
Fig. 2 is the structural representation of constant volume bullet transverse section of the present invention;
Fig. 3 is the structural representation in constant volume bullet longitudinal profile of the present invention;
Fig. 4 is magnetic coupling fan structure schematic diagram of the present invention;
In all of the figs, the technical characteristic of identical Reference numeral TYP, wherein, 1. constant volume combustion bomb, 2. silica gel heating plate and temperature control, 3. charge amplifier Kistler5018, 4. pressure transducer Kistler6052C, 5. schlieren, 6. high-speed digital photography machine, 7. fuel injector, 8. common rail pipe, 9. drive motor and high-pressure oil pump CP3.3, 10. fuel tank and filter cleaner, 11. fuel injector driving control unit, 12. hand valves, 13. gas cylinders and reduction valve, 14. solenoid valves, 15. solenoid-driven control modules, 16. high-speed data acquisition card NIUSB-6251M, 17. computers, 18. experimental power supplies, 19. constant volume combustion bomb burning bodies, 20. quartz glass holder, 21. quartz glass cover plates, 22. quartz glasss, 23. main thread glands, 24. mute plugs, 25. oil injector seats, 26. oil injector seat O type circles, 27.M8 socket cap screw, 28.M8 pad, 29. main mount pad O type circles, 30.M6 socket cap screw, 31.M6 pad, 32. quartz glass pads, 33. sensor holders, 34. sensor pads, 35. fan electromotors, 36. initiative drive shafts, 37. active rotation covers, 38. active magnetic main parts, 39. slave drive axles, 40. spacer sleeves, 41. driven revolving parts, 42. driven magnetic main parts, 43. fan mount pads.
Wherein glass mount pad comprises parts 20 ~ 23 and 30 ~ 32, and main mount pad comprises parts 24 ~ 29, and Submount comprises parts 30,31,33,34, and magnetic coupling fan comprises parts 35 ~ 43, and constant volume combustion bomb 1 refers to the one-piece construction comprising parts 19 ~ 43.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is further elaborated.Only in order to explain the present invention when relating to instantiation if illustrate herein, do not limit the present invention.In addition, just can be combined with each other as long as technical characteristic involved in each embodiment of the present invention described below does not form conflict each other.
As shown in Figure 1, gas distributing system primarily of gas cylinder and reduction valve 13, inflate solenoid valve 14, pressure transducer 4 and the formation such as pressure acquisition system and solenoid-driven control module 15, adopt Closed-loop Control Strategy.Firing system is made up of pen-type ignition coil and spark plug etc., the control inerface manual triggers ignition signal write by Labview.
Electrocontrolled high-pressure oil supply system is made up of drive motor and high-pressure oil pump 9, common rail pipe 8 and independently developed control module etc.When high-pressure oil pump 9 works, control system, by the pressure transducer Real-time Collection oil pressure on common rail pipe 8, regulates the fuel delivery per cycle of high-pressure oil pump 9.
Electrocontrolled high-pressure injection system is made up of Bosch CRIN2 current drive-type electric-controlled fuel injector 7 and independently developed fuel injector driving control unit 11 and host computer Injection Control program.The starting stage that oil spout triggers, the electric current that fuel injector driving control unit 11 provides peak value larger to fuel injector solenoid, makes solenoid fuel injection valve open rapidly under larger electromagnetic attraction.After solenoid fuel injection valve is opened completely, driving control unit reduces voltage makes electric current in coil be reduced to certain level, keeps size of current subsequently, to maintain the opening of solenoid fuel injection valve.Peak point current is larger, and solenoid valve opening speed is faster, and injection delay is less.Keep electric current to avoid coil to burn because electric current is excessive for a long time compared with I, when making end oil spout, solenoid fuel injection valve is taken a seat rapidly simultaneously, stops oil spout response soon, ensures the accurate control to distributive value and injection timing.Electric current after oil spout triggers in coil rises to peak current time from 0A and is about 300 microseconds, and after power-off, coil current self-sustaining electric current is down to zero required time and is about 30 microseconds, reaches re-set target, effectively ensure that the accurate control to fuel injector 7.
As shown in Figure 2,3, constant volume combustion bomb 1 is the topmost parts of experimental system, and it is made up of burning body 19, main mount pad, quartz glass mount pad, Submount and magnetic coupling fan.Burning body 19 is bases of firebomb, provides space, and bear the temperature and pressure of burning to combination gas.Be preferably designed for symmetrical cube structure in burning body 19 the present embodiment, cube six principal planes arrange six main mounting holes.Cube eight angles process the secondary mounting hole pointing to cube center.In six main mounting holes, arrange the consistent main mount pad of contour structures and glass mount pad, in eight secondary mounting holes, arrange the consistent Submount of contour structures.
Main mount pad is made up of main thread gland 23, mute plug 24, oil injector seat 25, oil injector seat O type circle 26, M8 socket cap screw 27, M8 pad 28 and main mount pad O type circle 29.Oil injector seat 25 is embedded among mute plug 24, and uses six M8 socket cap screws 27 to fix, and every screw is equipped with one piece of M8 pad 28.Oil injector seat 25 is T-type structures, puts into oil injector seat O type circle 26 and fill gap between oil injector seat 25 and mute plug 24 in the ring groove that the downside of oil injector seat 25 outer ring processes.Oil injector seat 25 is fixed on mute plug 24 and forms an entirety, its profile is also T-type structure, the gap that main mount pad O type circle 29 is filled mute plug 24 and burnt between body 19 is put in the ring groove that the downside of the outer ring of mute plug 24 processes, mute plug 24 directly contacts with main mounting hole in the least significant end of main mount pad with the integral arrangement of oil injector seat 25, is finally pressed on burning body by mute plug 24 with use main thread gland 23.
Glass mount pad is made up of quartz glass holder 20, quartz glass cover plate 21, quartz glass 22, main thread gland 23, M6 socket cap screw 30, M6 pad 31 and quartz glass pad 32.Quartz glass 22 is embedded in quartz glass holder 20, and uses quartz glass cover plate 21 to compress.Quartz glass cover plate 21 uses eight M6 socket cap screws 30 to be fixed in quartz glass holder 20, one piece of M6 pad 31 joined by every M6 socket cap screw 30, and uses quartz glass pad 32 to fill gap between quartzy glass cover-plate 21 and quartz glass 22.Quartz glass 22 is fixed between quartz glass holder 20 and quartz glass cover plate 21 and forms an entirety, its profile is T-type structure, puts into the gap that main mount pad O type circle 29 is filled quartz glass holder 20 and burnt between body 19 in the ring groove that the downside of the outer ring of quartz glass holder 20 processes.Quartz glass 22 is fixed on the integral arrangement between quartz glass holder 20 and quartz glass cover plate 21 and directly contacts with main mounting hole in the least significant end of main mount pad, finally quartz glass holder is pressed on burning body with use main thread gland 23.
Submount is mounted on the secondary mounting hole on burning cubical eight angles of body 19, forms primarily of sensor holder 33, sensor holder pad 34, M6 socket cap screw 30 and M6 pad 31.The M6 socket cap screw 30 that sensor holder 33 is directly furnished with M6 pad 31 with six is fixed on burning body, and uses the gap between sensor holder pad 34 filling sensor seat 33 and burning body 19.
As shown in Figure 4, fan is the effective means making combination gas produce eddy current in the burner, but due to temperature, higher pressure in burning body, comparatively greatly, general fan easily leaks gas in rotating shaft place, so adopt magnetic coupling fan to be arranged on main mounting hole.Magnetic coupling fan forms primarily of driven revolving part 41, active rotation cover 37 and spacer sleeve 40: fan mount pad 43 directly uses screw to be fixed on the main mounting hole of burning body 19, and the gap between fan mount pad 43 and burning body 19 filled by use fan mount pad pad.Fan electromotor 35 uses screw to be fixed on fan mount pad 43.Spacer sleeve 40 also uses screw to be fixed on burning body 19, and uses the gap that spacer sleeve pad is filled spacer sleeve 40 and burnt between body 19.Initiative drive shaft 36 linked fan motor 35, active rotation cover 37 is fixed on active rotation axle 36, and active magnetic main part 38 is fixed on active rotation cover 37; Driven magnetic main part 42 is fixed on driven revolving part 41, and driven revolving part 41 is fixedly connected on driven turning axle 39, and slave drive axle 39 is arranged on burning body 19 by two bearings, and fan blade is fixed on slave drive axle 39.When fan electromotor 35 starts, drive active magnetic main part 38 to rotate around spacer sleeve 40, principal and subordinate's magnetic main part 38 is rotated across the driven magnetic main part 42 of the discontiguous drive of spacer sleeve 40 by magnetic pole effect, thus drives fan blade to rotate, and don't can leak gas.
The schlieren preferably adopted in the present embodiment is CL-150 type schlieren, and its spherical mirror diameter is 150mm, and focal length is 1.5m, and slit width is continuously adjustabe in 0 ~ 3mm; The high-speed camera adopted is MotionProY4-S1 type high-speed digital photography machine, its ultimate resolution is 1024 × 1024 pixels, a full maximum shooting speed is 6000 frames/second (fps), when taking with the resolution of 1024 × 280 pixels, maximum shooting speed can reach the image acquisition process of 20200fps. high-speed camera can manual triggers, and Transistor-Transistor Logic level negative edge also can be adopted to trigger.When adopting fuel injection signal negative edge as TTL trigger pip, fuel injector can be obtained from the time powered up required for fuel oil ejection, can increase work efficiency simultaneously. the minimum exposure time of high-speed camera is 1 microsecond, time shutter continuously adjustabe, when the degree of depth of collection image is 8 ~ 10bit. cooperation Tokina100mmF2.8 type micro-lens, the development and change process of fuel spray in whole firing chamber can be observed.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a constant volume combustion bomb, for the combustion simulation of internal combustion engine, is characterized in that, this constant volume combustion bomb comprises:
Body, it has the cube structure of cavity as burning chamber for inner, this body has six workplaces using as main installed surface and be positioned at the secondary installed surface that eight drift angles process, wherein each described main installed surface and secondary installed surface all offer central through hole, using as main mounting hole and secondary mounting hole;
Main mount pad, it is contained in two main mounting holes positioned opposite, for installing fuel injector with to the burning chamber oil spout in body;
Glass mount pad, it is contained in other two main mounting holes positioned opposite, for the observation window of mounting glass as observation burning chamber combustion situation;
Magnetic coupling fan, it is contained in last two main mounting holes positioned opposite, makes it to form eddy current for the combination gas in rotary actuation body burning chamber; And
Submount, it is contained in described secondary mounting hole, is provided with sensor in it, for the pressure and temperature measured in body burning chamber.
2. a kind of constant volume combustion bomb according to claim 1, wherein, described main mount pad comprise be enclosed within described main mounting hole and have step through-hole mute plug, be arranged on the oil injector seat in described mute plug step through-hole by bolt coaxial package, be provided with sealer between the two and by being threaded with described body for the main thread gland be fixed on by described mute plug on described body.
3. a kind of constant volume combustion bomb according to claim 1 and 2, wherein, described glass mount pad comprises and is enclosed within described main mounting hole and has with the quartz glass holder of central through hole, the quartz glass be sleeved on the central through hole of this quartz glass holder, being fixed by screws in described quartz glass holder for the quartz glass cover plate be pressed on by described quartz glass in this quartz glass holder and by being threaded for the main thread gland compressed by described quartz glass cover plate with described body.
4. a kind of constant volume combustion bomb according to claim 3, wherein, the central through hole of described quartz glass holder is horn-like, and the described quartz glass be sleeved on wherein is cone shape adaptively.
5. a kind of constant volume combustion bomb according to claim 3 or 4, wherein, described quartz glass and glass mount pad affixed with the adhesion of oil-resistant high-temperature room curing silicon rubber.
6. a kind of constant volume combustion bomb according to any one of claim 1-5, wherein, described magnetic coupling fan comprises fan mount pad, driven revolving part, active rotation cover and spacer sleeve, wherein said fan mount pad one end is fixedly mounted on described burning body, the other end is for fixedly mounting fan electromotor, described active rotation cover be coaxially fixed on the active rotation axle of described fan electromotor output shaft fixed connection on and synchronous rotary, described spacer sleeve coaxial sleeve active rotation cover in and with burning body be fixedly connected with, described driven revolving part coaxial sleeve is in this spacer sleeve and be fixedly connected with fan blade by slave drive axle, with synchronous axial system, fan electromotor drives the active magnetic main part be arranged on initiative drive shaft to rotate, driven magnetic main part is made to follow the rotation of active magnetic main part due to magneticaction, thus drive the driven turning axle be connected on driven revolving part to rotate, and then drive fan blade to rotate.
7. a kind of constant volume combustion bomb according to any one of claim 1-6, wherein, described Submount comprises sensor holder and sensor holder pad, wherein said sensor holder coaxial package is in described secondary mounting hole, and be fixed by screws on body, described sensor holder pad is arranged between sensor holder and burning body, for sealing.
8. a kind of constant volume combustion bomb according to any one of claim 1-7, wherein, the central axis of described each secondary mounting hole all intersects at body burning chamber center.
9. one kind has the burner of the constant volume combustion bomb according to any one of claim 1-8.
10. one kind has the burner of the constant volume combustion bomb according to any one of claim 1-8, it is characterized in that, this burner also comprises automatically controlled gas distributing system, electronic control injection and firing system, and image and pressure acquisition system, wherein, the main draft tube of described automatically controlled gas distributing system, burning body valve and angle mount pad, it is communicated with burning body with angle mount pad via burning body valve by this main draft tube, for accurately controlling the air inflow of respective components gas in each branch air path, described electronic control injection is communicated with spark plug with the fuel injector in body with firing system, it is for realizing the sequential control of igniting and oil spout, final premixed combustion and the fuel injection processes realizing burning indoor fuel gas, described image and pressure acquisition system comprise and are arranged on glass vision panel on constant volume bullet and pressure transducer, be respectively used to gather burning cavity pressure and image information, to be fed back to automatically controlled gas distributing system and electronic control injection and firing system by controller process, for the open and close controlling parameter as distribution solenoid valve, and for electronic control injection Systematical control oil injection time.
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| CN201510633340.2A CN105372072A (en) | 2015-09-29 | 2015-09-29 | Constant volume combustion bomb and combustion device with same |
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| CN201510633340.2A CN105372072A (en) | 2015-09-29 | 2015-09-29 | Constant volume combustion bomb and combustion device with same |
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