CN206556876U - Constant volume combustion bomb, pre-mix reservoir and constant volume combustion bomb system - Google Patents
Constant volume combustion bomb, pre-mix reservoir and constant volume combustion bomb system Download PDFInfo
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- CN206556876U CN206556876U CN201621483458.8U CN201621483458U CN206556876U CN 206556876 U CN206556876 U CN 206556876U CN 201621483458 U CN201621483458 U CN 201621483458U CN 206556876 U CN206556876 U CN 206556876U
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Abstract
A kind of constant volume combustion bomb, pre-mix reservoir and constant volume combustion bomb system, wherein, constant volume combustion bomb includes：Body, with combustion chamber, the first fan built in the combustion chamber, and the first motor that driving first fan is rotated.The utility model drives the first fan to be rotated in combustion chamber by the first motor, and the combustion mixture in stirring combustion chamber, the combustion mixture of accelerated combustion intracavitary is well mixed, and improves the burn rate of combustion mixture, it is ensured that uniformity of temperature profile in combustion chamber.
Description
Technical field
The utility model is related to technical field of internal combustion engines, and in particular to a kind of constant volume combustion bomb, pre-mix reservoir and constant volume combustion
Burn bullet system.
Background technology
In order to save the discharge of the energy and reduction vehicular engine, scholar both domestic and external is devoted to new technology, new model
Exploitation and research, to tackle the present situation of increasingly serious energy shortage and strict Abgasgesetz.For engine in itself
Optimization design, researchers are the combustion mechanism for studying engine after all, fundamentally solve the combustion problem of engine,
With the dynamic property for improving engine, economical and emission performance.
In field of internal combustion engine, fuel atomizing process directly affects burning and discharge performance, so for alleviate the energy and
Environmental problem contributes.Therefore for internal combustion engine researcher, spray characteristics (the jet crushing length, spray of fuel are obtained
Spray angle, oil droplet size and speed etc.) and its with ambient parameters (pressure, temperature, environmental gas species and density etc.)
Relation, and then fuel atomization reaction mechanism is set up, final is that engine Spray Simulation and optimization provide basic data,
It is the main purpose for carrying out oil atomizing research.
The processes such as actual ejection atomization, diffusion, evaporation, burning, heat transfer due to engine are sufficiently complex, and with following
Ring changes, and the control to environmental condition is more difficult, and is difficult to carry out observational study.And it is close to be confined to engine combustion space
Close, researchers can not intuitively observe combustion process, be that the research of combustion mechanism brings difficulty.
In order to solve this problem, constant volume combustion bomb is just arisen at the historic moment.Constant volume combustion bomb is to be used to study premixed combustion
Closed container, with burning of the simulated engine near piston top dead center, be characterized in simple in construction, can easily change
Thermodynamic parameter and ignition parameter, constant volume combustion bomb are provided with visualization window, are the weights to fuel combustion theoretical basis research
Want instrument.Flame velocity, spread speed, the stability of flame combustion, combustion pressure etc. can pass through constant volume combustion bomb
Obtained plus subtest equipment, great convenience is provided for the research of combustion mechanism.
Constant volume combustion bomb system is generally comprised：Body with combustion chamber, and pre-mix reservoir.Pre-mix reservoir has mixing
Chamber, for preparing and storing combustion mixture.After the combustion mixture in pre-mix reservoir reaches requirement, body is delivered to
Combustion chamber in, carry out corresponding combustion test.
But, there is mixing non-uniform phenomenon in the combustion mixture in pre-mix reservoir, be delivered to after body and similarly mix not
Uniformly.The thermal stratification that this is allowed in combustion mixture burning after-combustion chamber is serious, in the visualization window of constant volume combustion bomb
Vapor is easily condensed, the observation to combustion position in combustion chamber is influenceed.
Utility model content
The problem of the utility model is solved is that combustion mixture mixing is uneven in the pre-mix reservoir and body of constant volume combustion bomb
It is even.
To solve the above problems, the utility model provides a kind of constant volume combustion bomb, the burning for simulating internal combustion engine, bag
Include：Body, with combustion chamber, the first fan built in the combustion chamber, and the first motor that driving first fan is rotated.
Optionally, the wall of the body is provided with least six mounting holes；Wherein, three mounting holes are used to install form,
The form is used for the combustion position observed in the combustion chamber；One mounting hole is used to install fuel injector, and a mounting hole is used
In installing first motor, a mounting hole is used to install spark plug.
Optionally, any three mounting holes are used to install form, and any one mounting hole is used to install fuel injector, appoints
One mounting hole of meaning is used to install first motor, and any one mounting hole is used to install spark plug.
Optionally, the form is staggeredly arranged.
Optionally, the form is respectively arranged on the wall of three mutually perpendicular directions of the body.
Optionally, the form includes：The main part being made up of quartz glass, and located at the main part towards place
The mounting hole part on convex portion；Edge is towards the direction of the combustion chamber, the installation for installing the form
Hole includes the first mounting hole and the second mounting hole, and second mounting hole is compared to first mounting hole closer to the burning
Chamber, the aperture of first mounting hole is more than the aperture of second mounting hole；
The main part is in second mounting hole, and the convex portion offsets with first mounting hole.
Optionally, heating plate is additionally provided with the wall of the body, the heating plate is used to heat the body.
Optionally, in addition to cover plate, the cover plate is covered on the mounting hole for installing first motor；In the combustion chamber
Dividing plate is additionally provided with, the dividing plate, the cavity wall of the combustion chamber and the cover plate surround accommodating chamber, and first motor is located at described
In accommodating chamber, first motor has output shaft, and the output shaft stretches out the accommodating chamber and extends to the combustion chamber, institute
State the first fan and be sheathed on the output shaft, and in the combustion chamber.
Optionally, in addition to hollow gland, it is covered on the form, for the form to be anchored on into the installation
Hole；Red steel paper gasket is provided between the gland and the form, is enclosed between the convex portion and the first mounting hole provided with O.
Optionally, in addition to cooling duct, the cooling duct is set around first motor, and the cooling duct is supplied
Cooling medium stream passes to cooling first motor.
Optionally, the body is in octagon column.
The utility model also provides a kind of pre-mix reservoir, described for preparing and storing combustion mixture with hybrid chamber
Combustion mixture can burn in the combustion chamber of constant volume combustion bomb described above, the second wind built in the hybrid chamber
Fan, and the second motor that driving second fan is rotated.
Optionally, the pre-mix reservoir is in the tubular of both ends open, and the two ends of the pre-mix reservoir opening are sealed by gland
Close the hybrid chamber；Dividing plate, the dividing plate, the cavity wall of the hybrid chamber and one of them described gland are provided with the hybrid chamber
Accommodating chamber is surrounded, second motor is in the accommodating chamber, and second motor has output shaft, and the output shaft stretches out
The accommodating chamber simultaneously extends to the hybrid chamber, and second fan is sheathed on the output shaft, and in the hybrid chamber.
Optionally, in addition to cooling duct, the cooling duct is set around second motor, and the cooling duct is supplied
Cooling medium stream passes to cooling second motor.
The utility model also provides a kind of constant volume combustion bomb system, including：Constant volume combustion bomb described in any of the above-described；On
The pre-mix reservoir described in any one is stated, the hybrid chamber of the pre-mix reservoir can connect with the combustion chamber of the constant volume combustion bomb
It is logical, to provide combustion mixture to the combustion chamber.
Optionally, in addition to：Air distribution system, for dispensing fuel gas to the hybrid chamber of the pre-mix reservoir.
Optionally, in addition to:Ignition system, the combustion mixture ignited for lighting a fire in the combustion chamber.
Optionally, in addition to：Oil supply system, for providing fuel oil to the fuel injector on the body.
Optionally, in addition to：Image capturing system, for the combustion position observed and photographed in the combustion chamber.
Compared with prior art, the technical solution of the utility model has advantages below：
The utility model sets the first fan, and the first fan of driving to turn in the combustion chamber of the body of constant volume combustion bomb
The first dynamic motor；Meanwhile, the second fan is also set in the hybrid chamber of pre-mix reservoir, and the second fan of driving rotate the
Two motors.The second fan is driven to be rotated in hybrid chamber by the second motor, for preparing and store in stirring hybrid chamber is flammable mixed
Gas is closed, accelerates the combustion mixture in hybrid chamber to be well mixed.After combustion mixture is delivered to combustion chamber, pass through the first motor
The first fan is driven to be rotated in combustion chamber, the combustion mixture in stirring combustion chamber, the combustion mixture of accelerated combustion intracavitary
It is well mixed, improve the burn rate of combustion mixture, it is ensured that uniformity of temperature profile in combustion chamber, reduction constant volume combustion bomb can
The degree of vapor is condensed on window depending on changing, is conducive to the observation to combustion position in combustion chamber.
Further, the utility model sets at least three forms on body, and three forms are staggeredly arranged, and are distributed in
On wall in three mutually orthogonal directions of body, it can be seen with the comprehensive combustion position observed by form in combustion chamber
Survey without dead angle area.
Further, the utility model is provided with polylith heating plate on the wall of body, and the heating surface (area) (HS of heating plate is big, body
Heating effect substantially, form on body can with it is heated after body realize and condenses vapor on heat exchange, reduction form
Degree, be conducive to by form observe combustion chamber in combustion position.
Further, form of the present utility model is in boss-shaped, and form is embedded on the mounting hole of body, expands form
Lifting surface area, improve the ability that form bears pressure.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model embodiment constant volume combustion bomb system；
Fig. 2 is the side view of body in the utility model embodiment constant volume combustion bomb system；
Fig. 3 is the sectional view one along A-A directions in Fig. 2；
Fig. 4 is the stereogram one of pre-mix reservoir in the utility model embodiment constant volume combustion bomb system；
Fig. 5 is the side view of pre-mix reservoir in the utility model embodiment constant volume combustion bomb system；
Fig. 6 is the sectional view along B-B directions in Fig. 5；
Fig. 7 is the stereogram one of body in the utility model embodiment constant volume combustion bomb system；
Fig. 8 is the stereogram two of body in the utility model embodiment constant volume combustion bomb system；
Fig. 9 is the structural representation of form under the utility model embodiment constant volume combustion bomb system section view angle；
Figure 10 is the sectional view two along A-A directions in Fig. 2；
Figure 11 is the stereogram two of pre-mix reservoir in the utility model embodiment constant volume combustion bomb system；
Figure 12 is the control block diagram of the utility model embodiment constant volume combustion bomb system；
Figure 13 is the pressure change schematic diagram in the body of the utility model embodiment constant volume combustion bomb system.
Embodiment
In the prior art, combustion mixture mixes uneven, constant volume burning in the pre-mix reservoir and body of constant volume combustion bomb
Vapor is easily condensed in the visualization window of bullet, the observation to combustion position in combustion chamber is influenceed.The utility model fires in constant volume
Burn and fan and motor are set in the pre-mix reservoir and body of bullet, motor-driven fan is rotated, in agitation pre-mix reservoir and body
Combustion mixture, accelerates the combustion mixture in hybrid chamber to be well mixed, it is ensured that uniformity of temperature profile in combustion chamber, reduces constant volume
The degree of vapor is condensed in the visualization window of firebomb, is conducive to the observation to combustion position in combustion chamber.
It is understandable to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of utility model is described in detail.
The utility model provides a kind of constant volume combustion bomb system, the burning for simulating internal combustion engine.With reference to Fig. 1, this implementation
The constant volume combustion bomb system of example includes：Constant volume combustion bomb and pre-mix reservoir 30.Wherein, constant volume combustion bomb includes body 10, reference
Fig. 2 and Fig. 3, body 10 has combustion chamber 15, and combustion mixture can burn in combustion chamber 15.With reference to Fig. 4 to Fig. 6, premix
Container 30 has hybrid chamber 31, can be prepared in the hybrid chamber 31 of pre-mix reservoir 30 and storage combustion mixture, when flammable mixing
Gas reaches after test requirements document that hybrid chamber 31 can be connected with combustion chamber 15, and pre-mix reservoir 30 conveys combustion mixture to body 10.
Pre-mix reservoir 30 can also store more premixed gas ammunition feed body 10 and be used for multiple times.
It is well mixed in order that obtaining combustion mixture in the combustion chamber 15 of body 10 and the hybrid chamber 31 of pre-mix reservoir 30,
With reference to Fig. 3, the present embodiment sets the first fan (not shown), and the first fan of driving to turn in the combustion chamber 15 of body 10
The first dynamic motor 12, the first fan is sheathed on the output shaft of the first motor 12.Meanwhile, with reference to Fig. 6, also in pre-mix reservoir 30
Hybrid chamber 31 in the second fan 33, and the second motor 32 that the second fan 33 of driving is rotated are set, the second fan 33 is arranged
In on the output shaft of the second motor 32.
Drive the second fan 33 to be rotated in hybrid chamber 31 by the second motor 32, prepare and store in stirring hybrid chamber 31
Combustion mixture, accelerate hybrid chamber 31 in combustion mixture be well mixed.After combustion mixture is delivered to combustion chamber 15,
The first fan is driven to be rotated in combustion chamber 15 by the first motor 12, the combustion mixture in stirring combustion chamber 15 accelerates combustion
The combustion mixture burnt in chamber 15 is well mixed, and improves the burn rate of combustion mixture, it is ensured that Temperature Distribution in combustion chamber 15
Uniformly, the degree of vapor is condensed in the visualization window of reduction constant volume combustion bomb, is conducive to combustion position in combustion chamber 15
Observation.
With reference to Fig. 7 and Fig. 8 and with reference to shown in Fig. 3, overall body 10 of the present utility model is in octagon column, in body 10
Wall be provided with least six mounting holes (not shown), in the present embodiment, provided with six mounting holes.Specifically, in body 10
On three axial directions (in Fig. 8 shown in tri- directions of X, Y and Z) are provided with the mounting hole of square crossing, mounting hole and combustion chamber 15
Connection.Wherein, three mounting holes are used to install form 14, and form 15 is used for the combustion position observed in combustion chamber 15；One peace
Dress hole is used to install fuel injector 18, and a mounting hole is used to install the first motor 12, and a mounting hole is used to install spark plug 17.
It should be noted that, the part that the mounting hole on the wall of body 10 is specifically installed is not limited, i.e., any three installations
Hole is used to install form 14, and any one mounting hole is used to install fuel injector 18, and any one mounting hole is used to install described the
One motor 12, any one mounting hole is used to install spark plug 17.
In the present embodiment, the diameter of mounting hole is about 90mm, and the combustion chamber 15 of body 10 is the mounting hole by three axial directions
The intersection region of formation is constituted, and volume is about 0.72L, the small volume of combustion chamber 15, when combustion mixture burns in cavity
Pressure change significantly, is conducive to analyzing fuel combustion process according to pressure change.
For the observation of the comprehensive combustion position in combustion chamber 15, the utility model is staggeredly arranged on body 10
Multiple forms 14.With reference to Fig. 7 and Fig. 8, three forms 14, the wall of three mutually perpendicular directions of body 10 are provided with the present embodiment
On, it can be understood as：The wall of the X-direction of body 10 is provided with a form 14, and the wall of Y-direction is provided with a form 14, Z side
To wall provided with form 14.
So setting can from different perspectives, the comprehensive combustion position observed by form 14 in combustion chamber 15, burning
Observation dead angle area is not present in chamber 15, complete combustion process can be observed.In other embodiments, it can set more
Form 14, with better by form 14 observe combustion chamber 15 in combustion position.
It should be noted that, the shape of body 10 is not limited, in the present embodiment, and body 10 is in octagon column, other
In embodiment, body 10 can be in other shapes, such as tubular.And the quantity of the mounting hole on body 10 is not limited,
Provided with 6 mounting holes in the present embodiment, in other embodiments, more mounting holes can be set.
For the combustion process in observation combustion chamber 15, the utility model also includes image capturing system (not shown).Figure
As acquisition system is mainly made up of light source, concave mirror, the edge of a knife and high speed camera etc., it can be needed to adjust form 14 according to experiment
Corresponding optical path is set behind position, using shadowing method, schlieren method, Mie scattering method, two color methods etc. to the premix in constant volume combustion bomb
Combination burning, spray and the process such as catch fire is shot.By taking schlieren method as an example, schlieren method is not limited to, schlieren method is close by difference
The medium of degree is imaged to the refractive index difference of light.Diesel spray is different from the refractive index of gas in the jar, spray evaporation heat absorption
Process is cooled down to its neighbouring gas, also causes gas in the jar density gradient occur, combustion process makes flame on preceding sharp side
There is greater density difference, so spray development process and clearly Flame front can be recorded in this way.
Foregoing describing constant volume combustion bomb can be with simulated engine cylinder inner carrier near top dead center constant volume burning process, typically
Change the influence that each experiment initial parameter is produced to combustion process for observing.In most cases, can be according to experiment demand in bullet
Optical observation window (form 14) is set on body 10, to shoot observation interior spray, flame propagation etc. using high-speed motion picture camera
Phenomenon.The material of optical observation window selects sapphire glass based on selection quartz glass under a few cases.
But, even if intensity is compared with the intensity low more than ten times of high glass relative combustion body material of main part steel, and mould
The experiment condition for intending environment in IC engine cylinder is higher to the pressure-resistant and heatproof intensity requirement of glass, therefore generally requires using larger
Thickness of glass to bear compression shock.Meanwhile, set optical observation window to influence the sealing of firebomb, particularly metal
Sealing between material and glass, and the sealing property of firebomb also has critically important shadow to result of the test and experiment safety
Ring.
In addition, the influence of the setting stream field of optical observation window is often ignored, this is to test simulation environment
It is to have larger potential impact；If also, optical observation window setting it is unreasonable combustion chamber surface configuration can be caused complicated,
Have very detrimental effect to the interaction of mock inspection combustion pressure wave and its back wave, complex surface it is irregular anti-
Penetrate the single primary condition for being easily destroyed experiment.In summary, optical observation window plays important shadow in the design of firebomb
Ring, optical observation window design rationally, can preferably observe the phase interaction of flame and combustion pressure wave and its wall back wave
With, and its occur the influence of phenomenon to flame propagation state and spontaneous combustion.
To obtain good experimental result, with reference to Fig. 3 and Fig. 9, the form 14 of the present embodiment includes：It is made up of quartz glass
Main part 14b, it is convex and located at main part 14b towards the convex portion 14a on the part of the mounting hole 13 (referring to Figure 10) at place
Portion 14a is also made up of quartz glass, it can be understood as：Form 14 is overall to be made up of quartz glass, and overall form 14 is in boss-shaped,
The section in the edge of form 14 towards the direction of combustion chamber 15 is stepped.
Form 14 selects high-purity quartz glass, reason be its there is very high deformation temperature and softening temperature, it is very low
Thermal coefficient of expansion and heat resistanceheat resistant shake ability, there is from infrared ray to ultraviolet extremely wide spectral transmission ability and relatively low dispersion show
As.High-purity quartz glass tensile strength, bending strength are higher by much compared with other glass, are only second to sapphire glass, but blue precious
The cost of stone glass is high, limits its application.In the present embodiment, quartz glass uses JGS1 types, it is seen that printing opacity under optical band
Rate is more than 90%.
With reference to Figure 10, along towards the direction of combustion chamber 15, the mounting hole 13 for installing form 14 includes the first mounting hole
13b and the second mounting hole 13a, the second mounting hole 13a is compared to the first mounting hole 13b closer to combustion chamber 15, the first mounting hole
13b aperture is more than the second mounting hole 13a aperture.In the present embodiment, main part 14b and convex portion 14a are cylindrical, convex portion
14a diameter is more than main part 14b diameter.
Wherein, main part 14b diameter is in 90mm between 100mm, including 90mm and 100mm, convex portion 14a diameter exists
110mm is between 120mm, including 110mm and 120mm.In other embodiments, convex portion 14a and main part 14b can be in other
Shape.The gross thickness of quartz glass is 50mm, a diameter of 90mm of visualization portion.With reference to Fig. 3 and Fig. 9, main part 14b is located at
In second mounting hole 13a, convex portion 14a offsets with the first mounting hole 13b, equivalent to form 14 is embedded in mounting hole 13.
With reference to Fig. 3 and Fig. 7, the constant volume combustion bomb system of the present embodiment also includes hollow gland 19, and gland 19 is covered on
On form 14, for form 14 to be anchored on into mounting hole.The corresponding position of gland 19 and form 14 and body 10 is equipped with spiral shell
Keyhole, gland 19, form 14 and body 10 are connected by M6 hexagon socket head cap screws, are then fixed again by M8 outer-hexagonals bolt 16.
The purpose so set is：Because the convex portion 14a and the first mounting hole 13b of form 14 offset, form 14 is expanded
Lifting surface area, improve the ability that form bears pressure, improve its shock resistance.And be provided between gland 19 and form 14
Red steel paper gasket (not shown), to protect the pretightning force of form 14 will not be excessive, prevents gland 19 from damaging form 14.It is convex in addition
Provided with O circles (not shown) between portion 14a and the first mounting hole 13b, O circles are fluororubber O circle, can play sealing function.
Have been described for, by setting the first motor 12 and the first fan in the combustion chamber 15 of body 10, to enable to above
Ignition temperature in combustion chamber 15 is uniform, reduces the degree that vapor is condensed on form 14, is conducive to observing by form 14
Combustion position in combustion chamber 15.In order to further reduce the degree that vapor is condensed on form 14, with reference to Fig. 7 and Fig. 8, body
Multiple heating plates 20 staggered with form 14 are additionally provided with 10, for being heated to body 10.
Heating plate 20 is heating copper coin in the present embodiment, and the contact area of heating copper coin and body 10 is big, and the efficiency of heating surface is high.
Because body 10 is metal material, the gland 19 for fastening form 14 is also metal material, and body 10 is heated by heating copper coin
Afterwards, heat transfer is carried out between body 10 and gland 19.Temperature on body 10 is transferred to gland 19, and is further transferred to form
14, equivalent to also heated to form 14, then, vapor is difficult to condense on form 14, is more beneficial for seeing by form 14
The combustion position surveyed in combustion chamber 15.In the present embodiment, Heated Copper board size is 220mm × 80mm × 10mm, copper coin general power
2800W, the circumferential plane of constant volume combustion bomb is bolted to by 4 M8.Constant volume combustion bomb temperature is controlled using feedback
Degree, 423K can be heated under without heat-retaining condition by constant volume combustion bomb.
In the present embodiment, with reference to Fig. 7 and Fig. 8, four heating copper coins are provided with body 10, in other embodiments,
As long as the arrangement space of body 10 allows, more heating copper coins can be set.
Additionally it should be noted that, in the present embodiment, the mounting hole size that is set on body 10 is consistent, with reference to Fig. 8 and ties
Close shown in Figure 10, can be installed in mounting hole in form 14, the first motor 12 and fuel injector 18, Fig. 8 is pointed by label 12
The location of first motor 12.Because the size of mounting hole is consistent, then can be installed in arbitrary mounting hole form 14,
First motor 12 and fuel injector 18, flexible arrangement form 14, the first motor 12 and fuel injector 18.At the same time it can also according to experiment
Need that other experimental facilities, the structure without changing body 10 are installed in mounting hole, you can meet more experiment demands.
It should be noted that, because burning temperature and pressure is higher in the combustion chamber 15 of body 10, and by the He of the first motor 12
First fan is built in combustion chamber 15, and HTHP will certainly produce influence to the first motor 12 and the first fan.Therefore, after
Continuous to refer to Fig. 3, the body 10 of the present embodiment also includes cover plate 19a, and cover plate 19a is covered on the mounting hole for installing the first motor 12,
To close mounting hole.Dividing plate 19b is additionally provided with combustion chamber 15, dividing plate 19b, the cavity wall of combustion chamber 15 and cover plate 19a surround receiving
Chamber 15a, the first motor 12 is in accommodating chamber 15a, and the first motor 12 has output shaft, and output shaft stretches out accommodating chamber 15a and prolonged
The combustion chamber 15 is extended, the first fan is sheathed on output shaft, and in combustion chamber 15.
Due to being provided with accommodating chamber 15a, and in the presence of dividing plate 19b, the high temperature in combustion chamber 15 is to the first motor 12
Influence weaken, and the first fan uses stainless steel, being capable of high temperature resistant.And the housing non-close of the first motor 12,
Therefore, influence of the hyperbaric environment to the first motor 12 is also reduced.
In addition, the present embodiment is additionally provided with cooling duct (not shown) on the first motor 12, cooling duct is around first
Motor 12 is set, cooling duct cooling but flow of media to cool down the first motor 12.The type of cooling can be water cooling or
It is air-cooled.Under the booster action of cooling duct, the first motor 12 is influenceed further to reduce by hot environment.
With reference to Fig. 4 and Figure 11, the pre-mix reservoir 30 of the present embodiment is in the tubular of both ends open, in other embodiments can be with
It is other shapes.The two ends that pre-mix reservoir 30 is open pass through gland 42,42a closed mixing chambers 31.Wherein, the wall of pre-mix reservoir 30
Thick 40mm, volume 4.6L, use the essence that a volume is larger, pressure-resistant higher pre-mix reservoir 30 is remarkably improved Gas Mixture Preparation
Degree, the repeatability of increase experiment, raising conventional efficient.
There are 6 stomatas in the main body of the pre-mix reservoir 30 of the present embodiment, including：Nitrogen air admission hole 36, oxygen air admission hole 37,
Ethene air admission hole 38, steam vent 39, safety valve stomata 41 and standby stomata 40.Wherein, nitrogen air admission hole 36 is used to be filled with nitrogen,
Oxygen air admission hole 37 is used to be filled with oxygen, and ethene air admission hole 38 is used to be filled with ethene.Safety valve stomata 41 is used in hybrid chamber 31
Interior gaseous mixture, which reaches, opens and is delivered to combustion chamber 15 after requirement, steam vent 39 is used to complete after combustion test, will be mixed
Close the gaseous mixture discharge of residual in chamber 31.The gas type being filled with into hybrid chamber 31 is not limited, can be according to experiment needs
Corresponding gas type is filled into hybrid chamber 31 by standby stomata 40.
Along the length direction of pre-mix reservoir 30, the main body both sides of pre-mix reservoir 30 connect with two cylindrical type glands 42,42a
Connect, each gland is fixed with 12 M14 studs, fluororubber O is used between the main body of gland and pre-mix reservoir 30
(not shown) sealing of circle.One end gland 42 installs pressure sensor 34 and thermocouple 35, and pressure sensor 34 can be
Kistler 4620A type pressure sensors, thermocouple 35 can be Omega K-type thermocouples；Other end gland 42a arrangements second
Pointed by label 32 it is the location of second motor 32 in the fan 33 of motor 32 and second, Fig. 4.
With reference to Fig. 6, dividing plate 31b, dividing plate 31b, the cavity wall of hybrid chamber 31 and one of gland 42a are provided with hybrid chamber 31
(referring to Fig. 4) surrounds accommodating chamber 31a, and the second motor 32 is in accommodating chamber 31a, and the second motor 32 has output shaft, output shaft
Stretch out accommodating chamber 31a and extend to hybrid chamber 31, the second fan 33 is sheathed on output shaft, and in hybrid chamber 31.Due to setting
Dividing plate 31b and accommodating chamber 31a is put so that the hyperbaric environment in hybrid chamber 31 influences to weaken on the second motor 32.
Wherein, pressure sensor 34 is used to detect the pressure in the hybrid chamber 31 of pre-mix reservoir 30, and thermocouple 35 is used to examine
The temperature surveyed in the hybrid chamber 31 of pre-mix reservoir 30, realizes the safety monitoring to pre-mix reservoir 30.Due to nitrogen, oxygen and ethene
Belong to fuel gas after mixing, in pre-mix reservoir 30, the gaseous mixture of nitrogen, oxygen and ethene can not burn, once burning, heat
Galvanic couple 35 will detect the temperature rise in hybrid chamber 31, should take corresponding measure；Meanwhile, it is filled with the nitrogen in hybrid chamber 31
The pressure of gas, oxygen and ethene need to be set according to experiment demand, once pressure sensor 34, which detects pressure, reaches requirement of experiment,
Air distribution system will be controlled to stop being filled with nitrogen, oxygen and ethene into hybrid chamber 31.
Further, since the first motor 12 and the second motor 32 can produce heat after working long hours, to avoid the first motor
12 and second motor 32 overheat, in the present embodiment, cooling duct is equipped with the first motor 12 and the second motor 32, for cold
But the first motor 12 and the second motor 32.First motor 12 is as the type of cooling of the second motor 32, with the second motor 32
Exemplified by the type of cooling, cooling duct is set around the second motor 32, and cooling duct is cooling copper tube.
With reference to Figure 11, inlet pipeline 44 and outlet pipeline 45, inlet pipeline 44 are provided with the body side of pre-mix reservoir 30
It is located at being partially around on the stator of the second motor 32 inside second motor 32 with outlet pipeline 45, coolant flows into water inlet pipe
Road 44, then flowed out from outlet pipeline 45, the cooling of the second motor 32 is realized by coolant circulation.
It should be noted that, in the present embodiment, the first motor 12 is all placed in combustion chamber 15, and the second motor 32 is all put
In hybrid chamber 31.The power line of first motor 12 draws combustion chamber 15, it is only necessary to realize sealing to the power line of the first motor 12
.Similarly, with reference to Figure 11, the power supply string holes 43 for the body side that the power line of the second motor 32 passes through pre-mix reservoir 30 are drawn
Go out, power supply string holes 43 are located at the same side with inlet pipeline 44 and outlet pipeline 45, it is only necessary to power supply string holes 43 are realized and sealed.
If the first motor 12 is placed in outside combustion chamber 15, axial one end of output shaft of the first motor 12 is located at combustion chamber 15
Interior, the axial other end stretches out combustion chamber 15, it is necessary to be sealed to the output shaft of the first motor 12, and the output of the first motor 12
Axle can be rotated when working, it is difficult to realize the sealing of the output shaft of the first motor 12.Similarly, if the second motor 32 is placed in into hybrid chamber
Outside 31, it is also difficult to realize the sealing of the output shaft of the second motor 32.Therefore, the first motor 12 is placed in combustion chamber 15, by
Two motors 32 are placed in hybrid chamber 31, are easy to sealing.
With continued reference to Fig. 3, to complete at the combustion test of internal combustion engine, other mounting holes of body 10, for example, in Fig. 3
Arrange that fuel injector 18, temperature sensor (not shown) and cooling system are (not shown at the mounting hole at the top of body 10
Go out), fuel injector 18 passes through gasket seal with residing mounting hole；Arranged at Fig. 3 bottom of body 10 and the mounting hole of sidepiece
Spark plug 17.Fuel injector 18 is used for the oil spout of combustion chamber 15 to body 10, when temperature sensor detects the temperature mistake of fuel injector 18
Gao Shi, will cool down fuel injector 18 by cooling system.
Constant volume combustion bomb system of the present utility model also includes：Air distribution system, for the hybrid chamber 31 to pre-mix reservoir 30
Dispense fuel gas；Ignition system, for the combustion mixture lighted a fire in pilot combustion chamber 15；Oil supply system, for located at
Fuel injector 18 on body 10 provides fuel oil.
Wherein, air distribution system includes gas cylinder, pressure-reducing valve, ball valve, needle-valve, DC electromagnetic valve, safety valve, vavuum pump
Deng.Gases at high pressure that pressure-reducing valve is exported to gas cylinder (nitrogen and oxygen are 15MPa, and ethene is 8MPa) are depressured, ball valve
For manual control piper break-make, needle-valve is used for adjusting gas flow.Magnetic valve is pressure-resistant 10MPa, power supply is 24V, and the system makes
The opening and closing of magnetic valve in distribution and intake and exhaust pipeline is accurately controlled with Closed-loop Control Strategy, to realize to distribution and breathing action
Long-range accurate control.
Ignition system is made up of two spark plugs, two ignition coils and ignition control module；Wherein, spark plug can be
BOSCH FR8DP spark plugs, ignition coil can be TC-28A ignition coils.According to the experiment single spark plug of demand selection or double fire
Spark plug ignition, ignition times can be set in control module, including single igniting, multiple igniting and three kinds of moulds of continuous ignition
Formula.
Oil supply system by motor, frequency converter, timing belt, synchronous pulley, tensioning wheel, high-pressure oil pump, common rail pipe, fuel tank,
Cleaner, high-pressure oil pipe, fuel injector and high-pressure common rail control module composition.The system uses the phase asynchronous frequency conversions of Siemens 11KW
Motor, the BOSCH CP1H type high-pressure plunger operation of oil pump that maximum working pressure (MWP) is 1600bar is driven by Timing Belt.
Motor is furnished with 15KW frequency converter, and the injection characteristics under different frequency can be studied as needed.High-pressure common-rail pipe
Integrated with using BOSCH Laser Welding, highest pressure voltage is 1600bar.The system uses electromagnetic drive type single hole fuel injector 18, can
Coordinate the high-pressure injection for realizing peak injection pressure 1600bar with the part such as high-pressure pump, common rail pipe, this fuel injector 18 is joined when working
Number is：Booster tension 100V；Motor current 22A；Operating voltage 24V；Keep electric current 12A；Injection diameter 0.25mm.
Temperature sensor (not shown), and water-cooling system, water cooling are additionally provided with the mounting hole for installing fuel injector 18
Injecor temperature can be adjusted for system.This module can install BOSCH, and Wuxi Oil Pump Nozzle Inst, Denso (China) is thrown
The fuel injector of the multiple models of company such as Co., Ltd is provided, is sealed between fuel injector 18 and mounting hole using copper backing.Temperature
Sensor is Omega K-type thermocouples, the combustion mixture initial temperature being filled with to measure in constant volume combustion bomb.Wherein, water
Cooling system includes water pump, water pipe, needle-valve, cooling copper tube and ferrule fitting, and needle-valve can adjust cooling water flow to control fuel injector
Temperature.
Stirring motor no-load speed 16500RPM, loads maximum (top) speed 14500RPM, rotating speed 8000RPM used in the system.
Outer diameter fan 30mm, is four flabellum stirred type fans.Spark plug type is BOSCH FR8DP, and pressure sensor is Kistler
6125C types, supporting Kistler 5018A type charge amplifiers are used.
The utility model also includes host computer interface, and host computer interface includes pre-mix reservoir, constant volume combustion bomb and driving three
Individual module.Pre-mix reservoir module control oxygen, ethene and the tunnel distribution magnetic valve of nitrogen three；The signal of collection includes pre-mix containers
Interior pressure and temperature signal, realize preparation and the Stateful Inspection of premixed gas.Constant volume combustion bomb module control inflation magnetic valve and
Exhaust solenoid valve；The signal of collection includes pressure in bullet, temperature and body surface temperature in bullet, realize constant volume combustion bomb inflation and
Stateful Inspection.Drive module mainly includes igniting driving and jet drive, igniting and nozzle parameter can be entered according to experiment demand
Row adjustment.
With reference to Figure 12, the combustion test process of internal combustion engine is described, combustion in IC engine experiment was included with the next stage：
The distribution stage：Nitrogen, oxygen and ethene by passing through nitrogen air admission hole, oxygen air admission hole, ethene air admission hole respectively
Into pre-mix containers, to prevent gas backstreaming during inflation, pre-mix containers are provided with check valve.Institute is calculated according to experimental program
The configuration proportion of gas is needed, is sent by ECU (Electronic Control Unit, electronic control unit) to air distribution system
Quantitative nitrogen, ethene and oxygen are poured in distribution signal, the magnetic valve opening and closing of control air distribution system successively.Magnetic valve uses pressure
Feedback control, when the corresponding pressure of pressure signal reaches preset value in pre-mix reservoir 30, the corresponding temperature of temperature signal meets
During temperature range, ECU sends supply signal to pre-mix reservoir, controls magnetic valve quick closedown, is supplied to body, it is ensured that distribution essence
Degree and security.
The premixed combustion stage：With reference to Fig. 1, after the distribution in pre-mix reservoir 30 reaches requirement, the peace in pre-mix reservoir 30
Full valve stomata 41 conveys the combustion mixture prepared by pipeline 10a to the combustion chamber 15 of constant volume combustion bomb, opens constant volume combustion
The first fan in bullet is burnt, corresponding rotating speed is set, such as is 8000rpm/min by speed setting, promotes gas to be fired with constant volume
Burn and play heat exchange, make its temperature consistent.ECU sends ignition signal to body, and control two spark plugs 17 igniting is ignited constant volume
Fuel gas in firebomb, the pressure signal fed back according to body and body temperature, temperature, pressure is quick in bullet after gas burning
Rise and reach peak value, high temperature and high pressure environment is formed after ignition, to simulate the injection environment in cylinder of diesel engine.
The oil spout stage：Cause environmental pressure after burning completes, reaches peak value because of the heat transfer loss of the wall of body 10
Continuous decrease；Fuel injection signal is sent to body when environmental pressure is down to threshold value set in advance, the oil spout of fuel injector 18 is triggered, together
When send camera trigger signal to high speed camera, triggering high speed camera record is whole spray and burning evolution.Wherein,
ECU is according to the rail pressure feedback signal of common rail pipe, the fuel injector 18 of control adjustable frequency motor, high-pressure oil pump and common rail pipe into body
Fuel feeding, is controlled between ECU and high-pressure oil pump for valve.
It is vented clean-up phase：After spraying and burning terminate, temperature, pressure drops to lower value in constant volume combustion bomb.The row of opening
Pneumoelectric magnet valve discharges waste gas, confirms after waste gas emptying, takes constant volume combustion bomb form 14 apart, and the inside of body 10 and form 14 are carried out
Cleaning.
That is, the constant volume combustion bomb system of the present embodiment be in advance be filled with into constant volume combustion bomb it is a certain amount of premixing it is flammable
Gas (relatively conventional for acetylene, hydrogen, oxygen, nitrogen), forms high temperature and high pressure environment, to simulate diesel oil after ignition
Injection environment in machine cylinder.By adjusting the premixed gas being filled with when oil injection time, it is convenient to change ambient parameter
(including excess air coefficient, simulation EGR rate, high temperature and high pressure environment).When the temperature, pressure in constant volume combustion bomb reaches experiment bar
During part, commencement of fuel injection simultaneously triggers camera system, and spray burning process is recorded, can be to Spray penetration distance, spray cone angle, liquid
Mutually run through and studied away from, the characteristic such as flame temperature, Soot Formation.
For example, with reference to Figure 13, initially pre-mixed gas 1.10MPa, wherein ethylene contents 3.5%, oxygen are filled with body 10
Gas content 31.5%, nitrogen content 65%.Pressure reaches maximum 5.62MPa in constant volume combustion bomb after ethylene combustion.Burning knot
Shu Hou, is gradually reduced with the lost pressure of heat, triggers oil spout when reaching goal pressure 4MPa, diesel oil is after spray burning
Pressure is caused to rise again.The pressure data of diesel combustion period is handled, you can obtain diesel oil in such circumstances stagnant
Combustion phase and heat liberation rate, heat release rate data.
Although the utility model is disclosed as above, the utility model is not limited to this.Any those skilled in the art,
Do not depart from spirit and scope of the present utility model, can make various changes or modifications, therefore protection domain of the present utility model
It should be defined by claim limited range.
Claims (18)
1. a kind of constant volume combustion bomb, the burning for simulating internal combustion engine, it is characterised in that including：Body, with combustion chamber, institute
State the first fan built in combustion chamber, and the first motor that driving first fan is rotated；
Also include cooling duct, the cooling duct is set around first motor, and the cooling duct supplies cooling medium stream
Pass to cooling first motor.
2. constant volume combustion bomb as claimed in claim 1, it is characterised in that the wall of the body is installed provided with least six
Hole；
Wherein, three mounting holes are used to install form, and the form is used for the combustion position observed in the combustion chamber；One peace
Dress hole is used to install fuel injector, and a mounting hole is used to install first motor, and a mounting hole is used to install spark plug.
3. constant volume combustion bomb as claimed in claim 2, it is characterised in that any three mounting holes are used to install form,
Any one mounting hole is used to install fuel injector, and any one mounting hole is used to install first motor, any one installation
Hole is used to install spark plug.
4. constant volume combustion bomb as claimed in claim 2, it is characterised in that the form is staggeredly arranged.
5. constant volume combustion bomb as claimed in claim 4, it is characterised in that the form is respectively arranged in three of the body
On the wall of mutually perpendicular direction.
6. constant volume combustion bomb as claimed in claim 2, it is characterised in that the form includes：The master being made up of quartz glass
Body portion, and located at the main part towards the convex portion on the part of the mounting hole at place；
Along towards the direction of the combustion chamber, include the first mounting hole and the second peace for installing the mounting hole of the form
Hole is filled, second mounting hole is compared to first mounting hole closer to the combustion chamber, the aperture of first mounting hole
More than the aperture of second mounting hole；
The main part is in second mounting hole, and the convex portion offsets with first mounting hole.
7. constant volume combustion bomb as claimed in claim 1, it is characterised in that heating plate is additionally provided with the wall of the body, described
Heating plate is used to heat the body.
8. constant volume combustion bomb as claimed in claim 2, it is characterised in that also including cover plate, the cover plate is covered on installation institute
State the mounting hole of the first motor；
Dividing plate is additionally provided with the combustion chamber, the dividing plate, the cavity wall of the combustion chamber and the cover plate surround accommodating chamber, described
First motor is in the accommodating chamber, and first motor has output shaft, and the output shaft stretches out the accommodating chamber and prolonged
The combustion chamber is extended, first fan is sheathed on the output shaft, and in the combustion chamber.
9. constant volume combustion bomb as claimed in claim 6, it is characterised in that also including hollow gland, is covered on the form
On, for the form to be anchored on into the mounting hole；Red steel paper gasket is provided between the gland and the form, it is described convex
Enclosed between portion and the first mounting hole provided with O.
10. constant volume combustion bomb as claimed in claim 1, it is characterised in that the body is in octagon column.
11. a kind of pre-mix reservoir, with hybrid chamber, for preparing and storing combustion mixture, the combustion mixture can be
Burnt in the combustion chamber of constant volume combustion bomb described in claim 1, it is characterised in that the second wind built in the hybrid chamber
Fan, and the second motor that driving second fan is rotated.
12. pre-mix reservoir as claimed in claim 11, it is characterised in that the pre-mix reservoir is in the tubular of both ends open, institute
The two ends for stating pre-mix reservoir opening the hybrid chamber is closed by gland；
Dividing plate is provided with the hybrid chamber, the dividing plate, the cavity wall of the hybrid chamber and one of them described gland surround receiving
Chamber, second motor is in the accommodating chamber, and second motor has output shaft, and the output shaft stretches out described accommodate
Chamber simultaneously extends to the hybrid chamber, and second fan is sheathed on the output shaft, and in the hybrid chamber.
13. pre-mix reservoir as claimed in claim 11, it is characterised in that also including cooling duct, the cooling duct is surround
Second motor is set, the cooling duct cooling but flow of media to cool down second motor.
14. a kind of constant volume combustion bomb system, it is characterised in that including：
Constant volume combustion bomb described in claim any one of 1-10；
Pre-mix reservoir described in claim any one of 11-13, the hybrid chamber of the pre-mix reservoir can be with the constant volume burning
The combustion chamber connection of bullet, to provide combustion mixture to the combustion chamber.
15. constant volume combustion bomb system as claimed in claim 14, it is characterised in that also include：Air distribution system, for described
The hybrid chamber dispatching fuel gas of pre-mix reservoir.
16. constant volume combustion bomb system as claimed in claim 14, it is characterised in that also include:Ignition system, draws for lighting a fire
Fire the combustion mixture in the combustion chamber.
17. constant volume combustion bomb system as claimed in claim 14, it is characterised in that also include：Oil supply system, for located at
Fuel injector on the body provides fuel oil.
18. constant volume combustion bomb system as claimed in claim 14, it is characterised in that also include：Image capturing system, for seeing
The combustion position surveyed and photograph in the combustion chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483458.8U CN206556876U (en) | 2016-12-30 | 2016-12-30 | Constant volume combustion bomb, pre-mix reservoir and constant volume combustion bomb system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621483458.8U CN206556876U (en) | 2016-12-30 | 2016-12-30 | Constant volume combustion bomb, pre-mix reservoir and constant volume combustion bomb system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164204A (en) * | 2018-09-25 | 2019-01-08 | 合肥工业大学 | A kind of multi-functional CONSTANT VOLUME MODEL COMBUSTION CHAMBER of multi-point spark |
| CN111006872A (en) * | 2018-10-08 | 2020-04-14 | 上海汽车集团股份有限公司 | Engine combustion isochoricity calculation method and device and engine combustion analyzer |
-
2016
- 2016-12-30 CN CN201621483458.8U patent/CN206556876U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109164204A (en) * | 2018-09-25 | 2019-01-08 | 合肥工业大学 | A kind of multi-functional CONSTANT VOLUME MODEL COMBUSTION CHAMBER of multi-point spark |
| CN109164204B (en) * | 2018-09-25 | 2020-11-24 | 合肥工业大学 | Multi-functional constant volume burner of multiple spot ignition |
| CN111006872A (en) * | 2018-10-08 | 2020-04-14 | 上海汽车集团股份有限公司 | Engine combustion isochoricity calculation method and device and engine combustion analyzer |
| CN111006872B (en) * | 2018-10-08 | 2021-11-16 | 上海汽车集团股份有限公司 | Engine combustion isochoricity calculation method and device and engine combustion analyzer |
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