CN206974693U - Simulate the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine - Google Patents
Simulate the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine Download PDFInfo
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- CN206974693U CN206974693U CN201720930448.2U CN201720930448U CN206974693U CN 206974693 U CN206974693 U CN 206974693U CN 201720930448 U CN201720930448 U CN 201720930448U CN 206974693 U CN206974693 U CN 206974693U
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Abstract
It the utility model is related to the constant volume combustion bomb system of the simulation a variety of combustion modes of Methanol/Diesel Dual Fuel Engine.The constant volume combustion bomb system of a variety of combustion modes of dual fuel engine is simulated, including：Constant volume combustion bomb, diesel injector, the diesel injection system being connected with diesel injector, methanol injector, the methanol spraying system being connected with methanol injector, gas handling system, gas extraction system, pressure sensor, simultaneous data-acquisition, high-speed camera, host computer.Tthe utility model system is by adjusting time for spraying of the methanol relative to diesel oil, can realize diesel oil ignited methanol, diesel oil and methanol and meanwhile catch fire, methanol is prior to a variety of combustion modes such as diesel oil spontaneous combustion, methanol uniform premix concentration stratification in constant volume combustion bomb can also be realized respectively, and the injection pressure of methanol is flexibly adjustable.
Description
Technical field：
Internal combustion engine constant volume combustion bomb technical field is the utility model is related to, further to simulation Methanol/Diesel Dual Fuel
The constant volume combustion bomb system of a variety of combustion modes of engine.
Background technology：
To meet that increasingly strict automobile emission regulation and fuel consumption regulation, more and more advanced engine technologies obtain
Using, including in-cylinder direct-jet, high-pressure injection, multi-injection, variable injection timing, lift range variable (VVL) and timing
(VVT), charge inter cooling, waste gas recycling (EGR) etc. improvement burning cylinder in purification techniques and triple effect catalytic converter (TWC),
The post-processing technologies such as oxidation refonner (DOC), SCR (SCR) and particulate filter (DPF), but either
Purification techniques also post-processing technology in cylinder, the deficiencies of technical threshold height, system complex, operation and maintenance with high costs all be present.
In order to improve discharge while fuel consumption is reduced, alternative fuel technology has obtained extensive concern in recent years.Alternative fuel
The technical scheme applied on the engine mainly has three kinds：The first is blending method, i.e., mixes two kinds of fuel by cosolvent
The liquid fuel of isotropic stable is formed, this mode is simple and easy, but weak point is to vary with temperature two kinds of fuel easily to go out
Now it is layered, and because the not high this mode of mutual solubility can not realize high substitution rate；The second way is to substitute completely, that is, is started
Machine only uses alternative fuel, such as methanol engine, natural gas engine and liquefied-pertroleum-gas engine etc., and this mode can be with
100% substitution rate is realized, but because fuel physico-chemical property difference need to be to doing larger change, and fuel adding etc. to engine
Complete sets of basic equipment facility is not popularized also；The third mode is the method for igniting, i.e., two kinds of fuel take two sets of independent supply systems, patent
Document CN1470752A discloses diesel oil/Methanol Compound Combustion Mode technology (Diesel Methanol Compound
Combustion, DMCC), the technology proposes to spray methanol in air inlet path for diesel engine, and forming homogeneous charge with air enters gas
Cylinder, then in the diesel oil ignited methanol of in-cylinder direct-jet and the gaseous mixture of air, this mode is flexible in actual applications, without right
Former machine does big change, and can realize higher substitution rate.Methanol production raw material sources are extensive, technology of preparing is ripe, raw
Production cost is low, storing and transporting security is convenient, in conjunction with diesel oil ignited Methanol Compound Combustion Mode technology so that methanol has as alternative fuel
Wide application prospect.
Find that, when methanol diesel oil substitute at high proportion, engine thermal efficiency is significantly by the application to this double fuel
Improve, particularly can provide wide answer to meet the existing Abgasgesetz of country for this combustion system without using urea
Use prospect.In order to further improve the thermal efficiency of this kind of engine and reduce hazardous emission, it is necessary to be carried out to its working mechanism
Further investigation.Research is concentrated mainly on engine rig test and actual road test at present, and on the basic burning side of double fuel
The research in face is also less.In order to probe into interaction mechanism during double fuel burning, deepen the understanding to double fuel burning, so as to
Preferably tissue burning, it is preferably engineer applied service to make double fuel burning, and carrying out related basic research work has very
Important meaning.On the engine because various factors is coupled, influence of the single factors to burning can not be studied；Compare
Compared with for, constant volume combustion bomb is simple in construction, it is possible to achieve the accurate control to unitary variant, being carried out with reference to other optical devices can
Combustion process can with visual and clear be disclosed depending on changing research, is especially suitable for carrying out the research in terms of basic burning.
Current disclosed patent document CN103245511A, patent document CN104391074A, patent document
CN105372072A, patent document CN106353098A, patent document CN106404410A are only applicable to the spraying of single-fuel
And combustion research；Patent document CN204788958U can realize that double fuel burns, and the technical scheme proposes be heated to necessarily
Methanol is injected in the air inlet pipeline of temperature, and vacuumize makes constant volume combustion bomb inner chamber form negative pressure in advance, so as to which methanol is sucked
Into constant volume combustion bomb, but this method has some obvious deficiencies：(1) the addition moment of uncontrollable methanol, it is difficult to for not
Double fuel catches fire and burnt in the hot atmosphere of diesel oil spirt methanol under synthermal condition, particularly hot conditions；(2) enter in advance
The methanol gaseous mixture of constant volume combustion bomb, once heating-up temperature reaches more than its ignition point, methanol will spontaneous combustion, significantly limit
To the research range of this double fuel burning, particularly in actual diesel oil methanol dual fuel engine running, high temperature bar
Middle high-load region is the high efficient district of dual fuel engine under part, but but cannot fully be studied；(3) methanol can not be realized
Stratified combustion enter because methanol is premix in constant volume combustion bomb, in constant volume combustion bomb be first before diesel injection
The homogeneous charge of alcohol and air, the concentration stratification of methanol can not be realized.
In summary, solve to study in constant volume combustion bomb double fuel burn faced methanol add the moment it is uncontrollable,
Environment temperature and pressure limit it is narrow and can not realize methanol concentration layering etc. technical problem.
The content of the invention：
The utility model provides a kind of constant volume combustion bomb for simulating a variety of combustion modes of Methanol/Diesel Dual Fuel Engine
System.Concrete technical scheme is as follows：
The constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated, including：Constant volume combustion bomb
16, diesel injector 8, the diesel injection system being connected with diesel injector, methanol injector 14, it is connected with methanol injector
Methanol spraying system, gas handling system, gas extraction system, pressure sensor 24, simultaneous data-acquisition 10, high-speed camera 17, on
Position machine 23；The diesel injection system, methanol spraying system, pressure sensor, high-speed camera are by simultaneous data-acquisition
Realize control；The constant volume combustion bomb includes：Circular cylindrical cavity, 2 end caps；2 end caps are divided into the first end cap, the second end
Lid；Transparent windows are set on the second end cap, and high-speed camera is arranged in outside constant volume combustion bomb and alignment transparent windows；It is described
Constant volume combustion bomb has heating function, the working environment for simulated engine；Diesel injection system and methanol the injection system
Unite respective independent control；Simultaneous data-acquisition by diesel injector signal, methanol injector signal, pressure sensor signal,
High-speed camera picture signal is synchronous, and stores data in host computer.
The side for the simulation a variety of combustion modes of Methanol/Diesel Dual Fuel Engine realized in above-mentioned constant volume combustion bomb system
Method, comprise the following steps：
Step 1：Check the air-tightness of constant volume combustion bomb；
Step 2：Gas handling system is filled with air to constant volume combustion bomb；
Step 3：Constant volume combustion bomb is begun to warm up, and the air in constant volume combustion bomb is reached predetermined pressure and temperature；
Step 4：Start diesel injection system, methanol spraying system；By adjusting the time for spraying of diesel oil and methanol respectively,
So as to realize diesel oil ignited methanol, diesel oil methanol at the same catch fire and methanol prior to diesel oil occur three kinds of different double fuels of spontaneous combustion
Combustion mode；
Step 5：High-speed camera record diesel injector, the injection scheme picture of methanol injector, and image during burning,
And it is stored in host computer.
It is resistance in circular cylindrical cavity inwall nesting refractory ceramics burner hearth in order to realize that constant volume combustion bomb has heating function
Refractory ceramics burner hearth embeds electric heating body.
Electric furnace heating wire may be selected in the electric heating body of the constant volume combustion bomb；Therefore, the constant volume combustion bomb also includes：Positioned at resistance to
First temperature sensor 25 of refractory ceramics burner hearth inner periphery, and the relay being connected by low resistance spark plug with electric furnace heating wire
Device, heating-up temperature PID controller.
The preferred distribution scheme of the diesel injector, methanol injector：The diesel injector is installed vertically on constant volume
On the circular cylindrical cavity of firebomb, the methanol injector is installed on the first end cap of constant volume combustion bomb center, diesel injection
The center line of device and methanol injector is in an angle of 90 degrees.
It is described in order to prevent that methanol spraying from directly contacting red-hot burner hearth wall and the further technique effect of spontaneous combustion occurs
The constant volume combustion bomb system of the simulation a variety of combustion modes of dual fuel engine also includes：Center line and methanol injector centerline weight
The cylindrical shape kuppe 15 of conjunction.
Preferably, the geometric parameter of the cylindrical shape kuppe meets：
D=α D,
Wherein d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe, and θ represents methanol injection
Device spray cone angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
One of specific implementation of the diesel injection system, including：Diesel oil electronic control unit 5, diesel fuel tanks 7, bavin
Oil rectifier 6, high-pressure oil pump 3, high-pressure common rail 4, high-pressure oil pipe, oil return pipe, machine oil charging machine, motor 2 and frequency converter 1；
One of specific implementation of the methanol spraying system, including：Methanol electronic control unit 19, methanol tank 11,
Gas-liquid booster pump 12, methanol pressurizing vessel 13, alcohol transportation pipe, input source of the gas 18, time alcohol pipe.
One of the gas handling system, specific implementation of gas extraction system, including：Tank of compressed air 22, pressure inverting
Device, air inlet electromagnetic valve 28, PID controller, air inlet needle-valve 29, air inlet pipe etc.；Air inlet pipeline is made up of parallel two-way, is all the way
Automatically controlled by air inlet electromagnetic valve, controlled manually by air inlet needle-valve all the way；The gas extraction system includes：Exhaust solenoid valve 26,
Vavuum pump 21 and exhaust needle-valve 27.
Preferably, in addition to：Cooling system；The cooling system includes diesel injector cooling system and methanol injector
Cooling system, two sets of cooling systems include water tank, water pump, cooling-water temperature sensor, circulating water line, cooling water cavity, fixed
Hold firebomb diesel injector mounting hole and methanol injector mounting hole around set respectively diesel injector cooling water cavity 31,
Methanol injector cooling water cavity 32；Diesel injector cooling system and methanol injector cooling system share water tank, a water pump
And cooling-water temperature sensor.
The beneficial effects of the utility model are：
(1) constant volume combustion bomb has heating function in the utility model, high temperature ring that can be in simulated engine inside cylinder
Border；In embodiment, by the way of constant volume combustion bomb burner hearth and electric furnace heating wire built in, it is possible to achieve to air in constant volume combustion bomb more
Add abundant and uniform heating.
(2) in the utility model embodiment, methanol uses completely self-contained spraying system, by adjust methanol relative to
The time for spraying of diesel oil, it is possible to achieve diesel oil ignited methanol, diesel oil and methanol catch fire simultaneously, methanol is a variety of prior to diesel oil spontaneous combustion etc.
Combustion mode, methanol uniform premix concentration stratification in constant volume combustion bomb, and the injection pressure of methanol can also be realized respectively
Power is flexibly adjustable.
(3) in the utility model embodiment, cylindrical shape kuppe has been installed additional in methanol injector periphery, can effectively prevent
Methanol hits red-hot burner hearth wall and spontaneous combustion occurs, can be by ambient temperature to higher, height in abundant simulation diesel engine
The heating power environment of combustion chamber HTHP in top dead centre during load.
(4) in the utility model embodiment, diesel injector and methanol injector are taken and arranged at an angle of 90 so that diesel oil
Oily beam and methanol spraying fully contact and mixing, so as to give full play to the interaction of two kinds of fuel rooms.
(5) in the utility model embodiment, the heating of constant volume combustion bomb electric furnace heating wire only need to pass through heating using automatically controlling
It is that the control to electric furnace heating wire can be achieved that temperature PID control device, which sets target temperature, so as to realize to air in constant volume combustion bomb
Automatic heating, and heating and temperature control obtain it is very accurate.
(6) in the utility model embodiment, gas handling system includes the parallel air inlet pipeline of two-way, a route pressure inverting
Device, high-pressure solenoid valve and PID controller are formed, and only need to set target pressure value by PID controller, you can control into pneumoelectric
The opening and closing of magnet valve, auto-admission is realized, another way is made up of air inlet needle-valve, takes manual control, and admission pressure can be carried out
Fine setting, so can both improve the efficiency and security of experiment, again can be with the accuracy of guarantee test；
(7) in the utility model embodiment, gas extraction system is automatically performed exhaust process using exhaust solenoid valve, without
Manually operated, gas extraction system is further equipped with vavuum pump, carries out vacuum pumping to constant volume combustion bomb after the completion of exhaust every time, excludes
The influence of the unburned methanol of residual and other combustion products to experiment next time, had so both improved the peace of experiment in constant volume combustion bomb
Quan Xing, test error is reduced again.
Brief description of the drawings：
Fig. 1 is overall system structure schematic diagram of the present utility model；1 represents frequency converter, and 2 represent motor, and 3 represent hydraulic oil
Pump, 4 represent high-pressure common rail, and 5 represent diesel oil electronic control unit, and 6 represent diesel fuel filter, and 7 represent diesel fuel tanks, and 8 represent diesel oil
Injector, 9 represent charge amplifier, and 10 represent simultaneous data-acquisition, and 11 represent methanol tank, and 12 represent gas-liquid booster pump, and 13
Methanol pressurizing vessel is represented, 14 represent methanol injector, and 15 represent cylindrical shape kuppe, and 16 represent constant volume combustion bomb, and 17 represent
High-speed camera, 18 represent gas-liquid booster pump input source of the gas, and 19 represent methanol electronic control unit, and 20 represent heating and temperature control
Module, 21 represent vavuum pump, and 22 represent tank of compressed air, and 23 represent host computer, and 24 representative pressure sensors, 25 represent first
Temperature sensor, 26 represent exhaust solenoid valve, and 27 represent exhaust needle-valve, and 28 represent air inlet electromagnetic valve, and 29 represent air inlet needle-valve.
Fig. 2 is constant volume combustion bomb complete section front view；8 represent diesel injector, and 14 represent methanol injector, and 15 represent cylinder
Shape kuppe, 30 represent constant volume combustion bomb thermal insulation layer, and 31 represent diesel injector cooling water cavity, and 32 represent the cooling of methanol injector
Water cavity, 40 represent quartz glass mounting hole.
Fig. 3 is Fig. 2 the first end cap left view direction schematic diagram；14 represent methanol injector, and 33 to represent methanol injector cold
But water inlet, 34 represent methanol injector coolant outlet.
Fig. 4 is Fig. 2 overlook direction schematic diagram；8 represent diesel injector, and 35 represent air admission hole, and 36 represent the first temperature
The mounting hole of sensor, 37 represent the spark plug mounting hole of connection electric furnace heating wire, and 38 represent steam vent, 39 representative pressure sensors peace
Fill hole, 42 representative pressure transmitter mounting holes.
Embodiment：
Embodiment：
The utility model is described in further detail below by specific embodiment, following examples can make this specially
The utility model is more completely understood in industry technical staff, but does not limit the utility model in any form.
As shown in figure 1, simulate determining for a variety of combustion modes of Methanol/Diesel Dual Fuel Engine this embodiment discloses herein a kind of
Hold firebomb system, including：Constant volume combustion bomb, diesel injector, the diesel injection system being connected with diesel injector, methanol spray
Emitter, the methanol spraying system being connected with methanol injector, gas handling system, gas extraction system, pressure sensor, synchronous data collection
Card, high-speed camera；The diesel injection system, methanol spraying system, pressure sensor are realized by simultaneous data-acquisition
Control；Host computer；
Constant volume combustion bomb 16 is that the circular cylindrical cavity of inner hollow is made of stainless steel, and its inside is equipped with refractory ceramics
Burner hearth, form a long 268mm, and diameter 80mm cylindrical cavity simulates the environment of burning chamber of diesel engine HTHP.
Burner hearth embeds electric furnace heating wire, and burner hearth inner periphery installs the first temperature sensor, subsequently connects through low resistance spark plug
The relay that is connected with electric furnace heating wire, heating-up temperature PID controller, relay and heating-up temperature PID controller are integrated in heating temperature
Spend in control module 20, only need to set target temperature in heating-up temperature PID controller during experiment, pass through relay
Break-make controls heating of the electric furnace heating wire automatically to air in constant volume combustion bomb 16.
The end cap at the both ends of constant volume combustion bomb 16 is fixed and clamped using high-strength bolt, the first end cap, the second end cap and body
Between be respectively provided with asbestos washer and ensure sealing, the second end cap is provided with quartz glass mounting hole 40, the first end cap installation methanol
Injector 14, and methanol injector cooling water cavity 32 is set, diesel injector 8 is arranged on the top of constant volume combustion bomb 16, and
Diesel injector cooling water cavity 31 is set, air admission hole 35, the first temperature sensor are additionally provided with the top of constant volume combustion bomb 16
Mounting hole 36, the spark plug mounting hole 37 for connecting electric furnace heating wire, steam vent 38, pressure sensor mounting hole 39, pressure transmitter peace
Fill hole 42.
Diesel injection system uses high pressure common rail fuel injection system, using the rotating speed of 1 controlled motor of frequency converter 2, so as to drive
Dynamic high-pressure oil pump 3 establishes rail pressure, and high-pressure oil pump 3 uses the oil pump of Bosch CPN2.2 models, and highest can realize 160MPa injection pressures
Power.
Methanol spraying system uses gas-liquid pressure-boosting pumping system, is provided by inputting source of the gas 18 to gas-liquid booster pump 12 less
Driving air pressure, you can realization is compressed to methanol so as to export the methanol of elevated pressures, and gas-liquid booster pump is a kind of plunger pump,
Pump fast reciprocating works during work, increases with output pressure, and the reciprocating motion of pump slows down until stopping, and now pump output pressure is permanent
Fixed, when pressure dwelling loop pressure declines, pump meeting automatic start, supplement reveals pressure, keeps circuit pressure stable.Adopted in the present embodiment
The model GD28 provided with Jinan Shineeast Fluid Systems Equipment Co., Ltd. product, the pump pressure ratio of the model is 28,
The driving air pressure of input source of the gas is no more than 0.8MPa, and rated output pressure is 22.4MPa, is sprayed in gas-liquid booster pump 12 and methanol
Install a pressurizing vessel 13 between device 14 additional, can so prevent the big ups and downs of injection pressure after multi-injection methanol.
Methanol injector 14 is using 6 hole fuel injectors are put in GDI, to ensure that it is porous that flow methanol injector 14 should be selected
Symmetrical injector.Its mouth of methanol injector 14 extend into the length held in bullet should not be oversize, and length is 1~3mm, because
For during experiment, the air inside constant volume combustion bomb is constantly heating, and temperature is very high, determine if methanol injector mouth stretches into
Oversize in appearance firebomb, then the methanol of methanol injector interior cannot well be cooled down and can vaporized, and the methanol of ejection is
Gas rather than liquid, influence result of the test.
The periphery of methanol injector 14 has installed a cylindrical shape kuppe 15 additional, prevents methanol spraying from directly contacting red-hot stove
Bore wall face and spontaneous combustion occurs because the constant volume combustion bomb 16 in the utility model is by the way of built-in burner hearth and electric furnace heating wire pair
Air in constant volume combustion bomb 16 is heated, and the wall surface temperature of burner hearth is high, especially the operating condition of test in high-temperature condition
Under, if methanol spraying directly contacts red-hot burner hearth wall and spontaneous combustion will occur.The length of cylindrical shape kuppe 15 and its diameter,
Methanol spray cone angle burner hearth internal diameter is relevant, and the oversize substantial amounts of methanol spray residues of kuppe 15 wherein can not be fully mixed with air
Close, cylindrical shape kuppe 15 is too short, can not stop methanol Spray Wall-Impingement.The diameter and length computation of cylindrical shape kuppe 15 are public
Formula：
D=α D,
Wherein, d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe 15, and θ represents spraying
Cone angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
Cooling system includes diesel injector cooling system and methanol injector cooling system, and two sets of cooling systems share one
Individual water tank, water pump and cooling-water temperature sensor, because the boiling point of methanol is 64 DEG C, it is noted that control water temperature during experiment
60 DEG C are not exceeded.
Pressure sensor uses Kistler 6125C type piezoelectric pressure indicators, subsequently connects Kistler
5018A1000 type charge amplifiers, frequency acquisition reach as high as 70kHz.
High-speed camera uses Photron companies FASTCAM SA1.1 type cameras, and camera lens uses Tokina companies MACRO
100F2.8D type products, the type camera shooting speed reach as high as 675000 frames/second, and resolution ratio reaches as high as 1024 × 1024,
The depth for gathering image is 12bit, can add filter plate, two-way device (duochrome method before camera lens as needed during experiment
Measurement soot), other optical devices such as image intensifier (shooting free radical light).
Simultaneous data-acquisition mainly includes simultaneous data-acquisition 10 (DAQ), data syn-chronization line and data line etc.,
Wherein DAQ uses NI companies USB-6251BNC type high-speed data acquisition cards, and simultaneous data-acquisition can realize that diesel injection is believed
Number, methanol injection signal, high-speed camera shooting signal, pressure sensor collection signal it is synchronous, and store data in upper
In machine.
Gas handling system includes the parallel air inlet pipeline of two-way, a route air inlet electromagnetic valve 28 and the structure of induction control module 41
Into wherein induction control module 41 includes pressure transmitter and PID controller, only need to pass through PID on induction control module 41
Controller sets target inlet air pressure value, you can the opening and closing of control air inlet electromagnetic valve 28, realizes auto-admission, another way is by pin
Valve 29 is formed, and takes manual control, and admission pressure can be finely adjusted.Due to the constant volume combustion bomb 16 under actual tests operating mode
Internal pressure is in the range of 1~4MPa, to ensure the security of the sealing of constant volume combustion bomb 16 and intake process and reliably
Property, air inlet electromagnetic valve 28 uses high-pressure solenoid valve.
Gas extraction system is automatically performed exhaust process using magnetic valve 26, without manually operated.It is fixed after testing due to completing
Hold the discharge of firebomb 16 is the gas of HTHP, to ensure the security of the sealing of constant volume combustion bomb 16 and exhaust process
And reliability, exhaust solenoid valve 26 use high temperature high voltage solenoid valve.Gas extraction system is further equipped with vavuum pump 21, and exhaust every time is completed
Exhaust needle-valve 27 is opened afterwards, and vacuum pumping is carried out to constant volume combustion bomb 16, excludes the unburned first of residual in constant volume combustion bomb 16
The influence of alcohol and other combustion products to experiment next time.
In order to easy to operate, control circle of diesel injector, methanol injector, high-speed camera, simultaneous data-acquisition
Face is integrated on host computer 23, tests obtained pressure and view data is stored in host computer 23.
The specific method tested using said system is as follows：
According to connecting each device of system shown in Fig. 1, and check the air-tightness of constant volume combustion bomb；
Target inlet air pressure value is set on induction control module, air inlet electromagnetic valve is opened and is filled into constant volume combustion bomb
Gas, when pressure reaches desired value in constant volume combustion bomb, air inlet electromagnetic valve disconnects automatically；
Diesel injection system, methanol spraying system, high-speed camera, pressure sensor, the first temperature sensor and same
Step data capture card is standby；Target fuel injection parameter is set by diesel oil electronic control unit, by frequency converter regulation motor to fit
When rotating speed is run, driving high-pressure oil pump establishes rail pressure；Start methanol spraying system simultaneously, set by methanol electronic control unit
Target sprays alcohol parameter, and the injection pressure of methanol is adjusted by adjusting the driving air pressure of gas-liquid pressure-boosting pumping system input source of the gas；It is logical
Cross host computer and set acquisition parameters, frequency acquisition is adjusted by simultaneous data-acquisition control unit；
Start cooling system；
Start heating system：Target temperature is set in heating and temperature control module, electric furnace heating wire is automatically to constant volume burning
The heating of air in bullet, when temperature reaches desired value in constant volume combustion bomb, the relay in heating and temperature control module disconnects, electricity
Stove silk stops heating, the pressure now as needed opened in air inlet needle-valve fine setting constant volume combustion bomb to desired value；
When the temperature and pressure condition in constant volume combustion bomb reaches predetermined value, triggering diesel oil electronic control unit starts manually
Oil spout, the trigger signal that methanol electronic control unit receives diesel oil electronic control unit start to spray methanol, and synchrodata is adopted
Truck also begins to work, and the shooting signal of high-speed camera and pressure measxurement collection signal synchronously trigger, when oil spout and spray alcohol knot
Shu Hou, diesel oil and pressure change in methanol combustion process and view data are recorded, and are stored in host computer；
Adjust the time for spraying of diesel oil and methanol in experiment respectively by diesel oil electronic control unit and methanol electronic control unit, so as to
Realize diesel oil ignited methanol, diesel oil methanol while catch fire and methanol occurs the different double fuel of three kinds of spontaneous combustion prior to diesel oil and burnt
Pattern, and the injection pressure of diesel oil and methanol, emitted dose can pass through diesel oil electronic control unit and methanol electronics control respectively
Unit regulation processed；Adjust the pressure and temperature in constant volume combustion bomb respectively by gas handling system and heating system, simulate different works
Heating power environment under condition in diesel combustion room；
Exhaust solenoid valve exhaust is opened after off-test, exhaust finishes disconnection exhaust solenoid valve, opens exhaust needle-valve and true
Empty pump vacuumizes to constant volume combustion bomb, is prepared for experiment next time.
Although the utility model is described above in conjunction with accompanying drawing, the utility model is not limited to above-mentioned
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, the ordinary skill of this area
Personnel are not departing from the utility model aims and right, can also made under enlightenment of the present utility model
Many variations, these are belonged within the scope of protection of the utility model.
Claims (10)
1. simulate the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine, it is characterised in that including：
Constant volume combustion bomb (16), diesel injector (8), the diesel injection system being connected with diesel injector, methanol injector
(14) the methanol spraying system, being connected with methanol injector, gas handling system, gas extraction system, pressure sensor (24), synchrodata
Capture card (10), high-speed camera (17), host computer (23)；The diesel injection system, methanol spraying system, pressure sensing
Device, high-speed camera are realized by simultaneous data-acquisition and controlled；
The constant volume combustion bomb includes：Circular cylindrical cavity, 2 end caps；2 end caps are divided into the first end cap, the second end cap；The
Transparent windows are set on two end caps, and high-speed camera is arranged in outside constant volume combustion bomb and alignment transparent windows；
The constant volume combustion bomb has heating function, the working environment for simulated engine；The diesel injection system and first
The respective independent control of alcohol spraying system；Simultaneous data-acquisition is by diesel injector signal, methanol injector signal, pressure sensing
Device signal, high-speed camera picture signal are synchronous, and store data in host computer.
2. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1,
Characterized in that, in circular cylindrical cavity inwall nesting refractory ceramics burner hearth, refractory ceramics burner hearth embeds electric heating body.
3. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 2,
Characterized in that, the electric heating body is electric furnace heating wire；Also include：Positioned at the first TEMP of refractory ceramics burner hearth inner periphery
Device (25), and be connected by low resistance spark plug with electric furnace heating wire relay, heating-up temperature PID controller.
4. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 2,
Characterized in that, the diesel injector is installed vertically on the circular cylindrical cavity of constant volume combustion bomb, the methanol injector peace
Loaded on the first end cap of constant volume combustion bomb center, the center line of diesel injector and methanol injector is in an angle of 90 degrees.
5. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 4,
Characterized in that, also include：The cylindrical shape kuppe (15) that center line overlaps with methanol injector centerline.
6. the constant volume combustion bomb system of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 5,
Characterized in that, the geometric parameter of the cylindrical shape kuppe meets：
D=α D,
<mrow>
<mi>L</mi>
<mo>=</mo>
<mi>&beta;</mi>
<mi>d</mi>
<mi> </mi>
<mi>cot</mi>
<mfrac>
<mi>&theta;</mi>
<mn>2</mn>
</mfrac>
<mo>,</mo>
</mrow>
Wherein d represents the internal diameter of kuppe 15, and D represents burner hearth internal diameter, and L represents the length of kuppe, and θ represents the spray of methanol injector
Spray angle, α, β are coefficients, and α spans are that 0.6~0.8, β spans are 0.55~0.65.
7. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-6 any one
Firebomb system, it is characterised in that：
The diesel injection system includes：Diesel oil electronic control unit (5), diesel fuel tanks (7), diesel fuel filter (6), high-pressure oil pump
(3), high-pressure common rail (4), high-pressure oil pipe, oil return pipe, machine oil charging machine, motor (2) and frequency converter (1).
8. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-6 any one
Firebomb system, it is characterised in that：
The methanol spraying system includes：Methanol electronic control unit (19), methanol tank (11), gas-liquid booster pump (12), methanol
Pressurizing vessel (13), alcohol transportation pipe, gas-liquid booster pump input source of the gas (18), time alcohol pipe.
9. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-6 any one
Firebomb system, it is characterised in that：
The gas handling system includes：Tank of compressed air (22), pressure transmitter, air inlet electromagnetic valve (28), PID controller, enter
Air tube valve (29), air inlet pipe；Air inlet pipeline is made up of parallel two-way, is to be automatically controlled by air inlet electromagnetic valve all the way, is all the way
Controlled manually by air inlet needle-valve；
The gas extraction system includes：Exhaust solenoid valve (26), vavuum pump (21) and exhaust needle-valve (27).
10. the constant volume of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine is simulated according to claim 1-6 any one
Firebomb system, it is characterised in that also include：Cooling system；The cooling system includes diesel injector cooling system and first
Alcohol injector cooling system, two sets of cooling systems include water tank, water pump, cooling-water temperature sensor, circulating water line, cooling
Water cavity, diesel injector is set to cool down respectively around the diesel injector mounting hole and methanol injector mounting hole of constant volume combustion bomb
Water cavity (31), methanol injector cooling water cavity (32)；Diesel injector cooling system and methanol injector cooling system share one
Individual water tank, water pump and cooling-water temperature sensor.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796629A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine |
| CN111426482A (en) * | 2020-05-06 | 2020-07-17 | 湖南汉能科技有限公司 | Aeroengine combustion chamber test bench |
-
2017
- 2017-07-28 CN CN201720930448.2U patent/CN206974693U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107796629A (en) * | 2017-07-28 | 2018-03-13 | 天津大学 | Simulate the constant volume combustion bomb System and method for of a variety of combustion modes of Methanol/Diesel Dual Fuel Engine |
| CN107796629B (en) * | 2017-07-28 | 2023-09-22 | 天津大学 | Constant volume combustion bomb system and method for simulating multiple combustion modes of methanol/diesel dual-fuel engine |
| CN111426482A (en) * | 2020-05-06 | 2020-07-17 | 湖南汉能科技有限公司 | Aeroengine combustion chamber test bench |
| CN111426482B (en) * | 2020-05-06 | 2021-03-23 | 湖南汉能科技有限公司 | Aeroengine combustion chamber test bench |
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