CN109323865B - The scavenging simulator and its application method of adjustable pressure control - Google Patents
The scavenging simulator and its application method of adjustable pressure control Download PDFInfo
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- CN109323865B CN109323865B CN201811315466.5A CN201811315466A CN109323865B CN 109323865 B CN109323865 B CN 109323865B CN 201811315466 A CN201811315466 A CN 201811315466A CN 109323865 B CN109323865 B CN 109323865B
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- 230000002000 scavenging effect Effects 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003921 oil Substances 0.000 claims abstract description 109
- 239000010727 cylinder oil Substances 0.000 claims abstract description 34
- 230000033001 locomotion Effects 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims description 31
- 230000005540 biological transmission Effects 0.000 claims description 24
- 238000002474 experimental method Methods 0.000 claims description 23
- 238000011144 upstream manufacturing Methods 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000004320 controlled atmosphere Methods 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims 1
- 239000000306 component Substances 0.000 description 9
- 238000011160 research Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000002269 spontaneous effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention provides the scavenging simulator and its application method of a kind of adjustable pressure control, including cylinder cap and cylinder body, and the cylinder body is top closed to have cylinder cap to form high-pressure bottle；Exhaust outlet and piston motion mouth are provided on the cylinder cap；In two adjacent sides of the cylinder body, a side is machined with the only oil overhold rod aperture of rectangle, and installs check device, and the side wall of another side is provided with Scavenge model；The Scavenge model includes block and the outer block of Scavenge model in Scavenge model.The scavenging simulator and its application method of adjustable pressure control of the present invention, the check device being arranged by the oil supply gallery that is arranged on block in scavenging port model, only outside oil overhold bar, piston and cylinder body realizes the cylinder oil supply under high pressure, compared with general special high-pressure oil droplet supply equipment, experimental cost is greatly saved.
Description
Technical field
The present invention relates to the cylinder oil kinetic characteristic experiments at large-scale two stroke engine scavenging characteristic peculiar to vessel and scavenging port
Technical field, specifically, more particularly to a kind of adjustable pressure control scavenging simulator and its application method.
Background technique
Increasingly stringent with emission regulation, to low speed two-stroke marine engine, more stringent requirements are proposed.It is flat to improve it
Equal effective pressure simultaneously guarantees that efficient stable burning is the core missions researched and developed at present.But since cylinder oil spontaneous combustion is quick-fried to what is caused
A series of problems, such as combustion, causes very big obstacle to the raising of engine power performance.Therefore it is fired certainly as research cylinder oil
The premise of control is fired, it is very necessary for studying cylinder oil kinetic characteristic at two-stroke low speed engine blow-through air characteristic and scavenging port
's.
The decomposition for generally laying particular emphasis on drop under research atomization characteristics to the research of cylinder oil kinetic characteristic both at home and abroad at present is broken
It is broken, it is injected into the deformation crushing experiment in air flow field including various types, stickiness and charging property drop, method therefor can summarize
For oil droplet instillation air flow field is shot its motion process.
It is fewer and fewer for the oil droplet kinetic characteristic research under specific structure, for scavenging process research nobody refer to,
Increasing stressed adjusting control, there are no people to be related to.And engine faces the oil droplet for remaining in casing wall scavenging port etc. by scavenging etc. really
Air motion brings the problem of cylinder forms potential self-ignition point into, so need to design the specific oil droplet peel test of scavenging process,
Oil droplet is brushed with air-flow rather than experimental method mentioned above.
Summary of the invention
It is asked according to the technology in oil droplet kinetic characteristic research set forth above, lacking the specific oil droplet peel test of scavenging process
Topic, and the scavenging simulator and its application method of a kind of adjustable pressure control are provided.The present invention mainly utilizes envelope at the top of cylinder body
It has closed cylinder cap and has formed high-pressure bottle, cooperated pressure regulation scavenging system, oil droplet supply system and information acquisition system three subsystems,
To play true pressure environment in simulated engine feature structure and cylinder, the research burnt and controlled for engine abnormity is mentioned
For convenience.
The technological means that the present invention uses is as follows:
A kind of scavenging simulator of adjustable pressure control, including cylinder cap and cylinder body, the cylinder body is top closed cylinder cap
Form high-pressure bottle；Exhaust outlet and piston motion mouth are provided on the cylinder cap；In two adjacent sides of the cylinder body, one
A side is machined with the only oil overhold rod aperture of rectangle, and installs check device, and the side wall of another side is provided with Scavenge model；Institute
Stating Scavenge model includes block and the outer block of Scavenge model in Scavenge model；Air inlet, the scavenging mould is arranged in the bottom surface of the cylinder body
Scavenging port is set on the outer block of type, and inlet flange is installed, set gradually from bottom to top on block in the Scavenge model scavenging runner,
Draining road, only oily lift pin passageways and oil storage tank.
The head of draining piston is installed in oil storage tank, and bar portion stretches out cylinder cap by the piston motion mouth, only oil overhold bar
It is protruded into Scavenge model in the only oily lift pin passageways of block by the only oil overhold rod aperture of cylinder side wall, outside contacts company with check device
It connects；The oil storage tank, draining road, draining piston, only oil overhold bar and check device form oil droplet supply system；The air inlet,
The a part of scavenging port and exhaust outlet as scavenging voltage-regulating system is connected with other scavenging voltage-regulating system components respectively, is swept
Controlled atmosphere pressure；The visible surface of the cylinder body is provided at least one light transmission form, and information image is delivered in video camera acquisition cylinder body
Information acquisition system.
Further, tool is there are four visible surface on the cylinder body, in four sides of the cylinder body, one of side tool
There is Scavenge model, the other three side is visible surface, and the bottom surface of the cylinder body is visible surface, and each visible surface is respectively arranged with one
A light transmission form；The light transmission form includes sight glass, form bottom flange and form top flange；The sight glass is installed on
Between form bottom flange and form top flange, and assemble the sealing of two panels polytetrafluoroethylene (PTFE) pad and a piece of pad of silica gel；Institute
It states and a piece of window gasket piece sealing is installed between form bottom flange and cylinder body, which is polytetrafluoroethylene (PTFE) pad
Piece.
Further, the scavenging voltage-regulating system includes air inlet, scavenging port, exhaust outlet, upstream pressure control valve, flow
Meter, high pressure gas cylinder, air intake valve, scavenging valve and connecting line；The air inlet and scavenging port pass through tee pipe fitting and high pressure
Gas cylinder is connected, and valve is arranged on the connecting line of the air inlet and scavenging port and controls opening and closing, is controlled respectively by air intake valve
The air inlet controls the scavenging port by scavenging air valve door；Flowmeter control is provided on the pipeline of the scavenging port connection
Scavenging flow, the exhaust outlet connect self-operated type upstream pressure control valve, are realized by controlling the upstream pressure of Open valve
The pressure of device is adjusted.
Further, the oil droplet supply system includes the oil storage tank, draining road, draining piston, stops oil overhold bar and stop
Return device；The oil storage tank and draining road constitute cylinder oil access, control oil circuit opening and closing, the only oil overhold bar by stopping oil overhold bar
Outside setting check device, the oil storage tank upper end are embedded in draining piston, by draining piston by pre-existing storage under hyperbaric environment
Cylinder oil in oil groove squeezes into draining road and is finally attached to scavenging runner.
Further, the check device includes limit control plug, limit control-rod and limit base；Limit control plug with
Limit base is threadedly coupled, and the limit control plug is controlled by the limit control-rod, feeding of spinning on the limit base
Movement, so that limitation stops the movement of oil overhold bar.
Further, the head of the draining piston is provided with three seals annular groove, and what it is close to bar portion is spare close together
Seal ring slot, remaining two seals annular groove are equipped with fluorine glue sealing ring.
Further, the high-speed camera of optical capturing equipment shoots cylinder interior situation by the light transmission form, claps
When taking the photograph, need to other than the light transmission form other light transmission forms setting light source guarantee field of view；The information acquisition system packet
Include optical capturing equipment and computer.
A kind of application method of the scavenging simulator of above-mentioned adjustable pressure control, comprising the following steps:
S1, the limit adjusted in check device control plug, and only oil overhold bar is headed into block in Scavenge model, closes draining road,
Cylinder oil is stored in oil storage tank, experiment apparatus is connected.
S2, scavenging port valve is closed, opens air inlet valve, adjusted pressure-control valve upstream pressure to experiment condition, beat
Open hyperbaric environment needed for high pressure gas cylinder forms experiment.
S3, adjusting limit control plug make only oil overhold bar opening draining road, and cylinder oil is squeezed into scavenging stream by adjusting draining piston
Road.
S4, air inlet valve is closed, opens scavenging port valve, complete experimentation, while optical device carries out shooting note
Record.
S5, experiment are completed, and are tested if you need to repeat, and scavenging port valve is closed, and control draining piston continues to squeeze into cylinder oil, beat
Scavenging port valve is opened to repeat to test.
The scavenging simulator and its application method of adjustable pressure control of the present invention, pass through matching for external control valve
It closes, adjustable in-cylinder pressure environment easily creates hyperbaric environment, adapts to different experiment conditions；Simultaneously by having scavenging made to order
Block can simulate the type scavenging port flow channel shape to be studied completely in model, realize and be directed to Journal of Sex Research；By in scavenging port
The oil supply gallery that is arranged on block in model, the check device being only arranged outside oil overhold bar, piston and cylinder body realize under high pressure
Cylinder oil supply, compared with general special high-pressure oil droplet supply equipment, without the use of syringe pump or piezoelectricity control generate
Single drop, is greatly saved experimental cost；Simultaneously by four forms of setting, can with multi-angle observation Flow field condition and
Cylinder oil deformation characteristics.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is integral experiment platform schematic diagram of the present invention.
Fig. 2 is core roughness schematic diagram of the present invention.
Fig. 3 is appearance diagram of the present invention.
Fig. 4 is core component draining Scavenge model schematic diagram of the present invention.
Fig. 5 is core component limited block schematic diagram of the present invention.
Fig. 6 is basic components cylinder body schematic diagram of the present invention.
Wherein: 1, draining piston, 2, cylinder cap, 3, oil storage tank, 4, cylinder body, 5, draining road, 6, form bottom flange, 7, form top
Flange, 8, tempered glass, 9, block in Scavenge model, 10, window gasket piece, 11, light transmission form, 12, scavenging port, 13, scavenging
Runner, 14, only oil overhold bar, 15, limit control plug, 16, limit control-rod, 17, limit base, 18, air inlet, 19, gas vent,
20, the outer block of Scavenge model, 21, inlet flange, 22, closure gasket groove, 23, light transmission form hole, 24, threaded mounting hole, 25, calculating
Machine, 26, high-speed camera, 27, gas exhaust piping, 28, upstream pressure control valve, 29, pressure reducing valve, 30, high pressure gas cylinder, 31, light source,
32, air inlet pipeline, 33, air intake valve, 34, tee pipe fitting, 35, scavenging valve, 36, flowmeter, 37, scavenging pipeline.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of the embodiment of the present invention, instead of all the embodiments.It is real to the description of at least one exemplary embodiment below
It is merely illustrative on border, never as to the present invention and its application or any restrictions used.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be clear that for ease of description, each portion shown in attached drawing
The size divided not is to draw according to actual proportionate relationship.Technology known for person of ordinary skill in the relevant, side
Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
In the description of the present invention, it is to be understood that, the noun of locality such as " front, rear, top, and bottom, left and right ", " it is laterally, vertical,
Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes
System, is merely for convenience of description of the present invention and simplification of the description, in the absence of explanation to the contrary, these nouns of locality do not indicate that
It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage
Solution is limiting the scope of the invention: the noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under its device or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
In addition, it should be noted that, limiting components using the words such as " first ", " second ", it is only for be convenient for
Corresponding components are distinguished, do not have Stated otherwise such as, there is no particular meanings for above-mentioned word, therefore should not be understood as to this
The limitation of invention protection scope.
As shown, the present invention provides a kind of scavenging simulator of adjustable pressure control, including cylinder cap 2 and cylinder body 4,
The cylinder body 4 is top closed to have cylinder cap 2 to form high-pressure bottle；This high-pressure bottle connects corresponding external equipment and builds completion experiment
Platform.
Exhaust outlet 19 and piston motion mouth are provided on the cylinder cap 2；In two adjacent sides of the cylinder body 4, one
A side is machined with the only oil overhold rod aperture of rectangle, and installs check device, and the side wall of another side is provided with Scavenge model；
The Scavenge model includes block 9 and the outer block 20 of Scavenge model in Scavenge model, welds, solves whole after processing respectively
The problem of body Model processing difficulties, the block 9 and outer block 20 of Scavenge model is equipped with threaded hole and cylinder body 4 connects in the Scavenge model
It connects, is equipped with weld groove outside the outer block 20 of the Scavenge model, after the installation is completed integral solder guarantee air-tightness, in the Scavenge model
Scavenging runner 13 is arranged in block 9, and shape simulates physical machine scavenging port shaped upper part completely and (is most likely to occur the position of oil droplet removing
Set), guarantee the reliability that experiment uses.
Air inlet 18 is arranged in the bottom surface of the cylinder body 4, scavenging air inlet 18 is arranged on the outer block 20 of the Scavenge model, and pacify
Inlet flange 21 is filled, sets gradually that scavenging runner 13, draining road 5, only oil overhold bar is logical in the Scavenge model on block 9 from bottom to top
Road and oil storage tank 3.
The head of draining piston 1 is installed in oil storage tank 3, and bar portion stretches out cylinder cap 2 by the piston motion mouth, only oil overhold
Bar 14 is protruded into Scavenge model in the only oily lift pin passageways of block 9 by the only oil overhold rod aperture of 4 side wall of cylinder body, external and check device
It connects；The head of the draining piston 1 is provided with three seals annular groove, and what it is close to bar portion is backup seal annular groove together,
Remaining two seals annular groove is equipped with the use of fluorine glue sealing ring, prevents air and cylinder oil from revealing.
The oil storage tank 3, draining road 5, draining piston 1, only oil overhold bar 14 and check device form oil droplet supply system；Institute
The a part of air inlet 18, scavenging port 12 and exhaust outlet 19 as scavenging voltage-regulating system is stated, respectively with other scavenging voltage-regulating systems
Component connection, carries out scavenging pressure regulation；The visible surface of the cylinder body 4 is provided at least one light transmission form 11, and video camera acquires cylinder
Information image is delivered to information acquisition system in body 4, and the high-speed camera 26 of optical capturing equipment passes through the light transmission form 11
Shoot 4 inner case of cylinder body, when shooting, need to other light transmission forms 11 setting light source 31 other than the light transmission form 11 guarantee to see
Examine the visual field；The information acquisition system includes optical capturing equipment and computer 25, and there is device pressure regulation scavenging system, oil droplet to supply
Answer system and information acquisition system three subsystems.
Tool is there are four visible surface on the cylinder body 4, and in four sides of the cylinder body 4, one of side has scavenging
Model, the other three side are visible surface, and the bottom surface of the cylinder body 4 is visible surface, and each visible surface is respectively arranged with one thoroughly
Light window 11；The light transmission form 11 includes sight glass 8, form bottom flange 6 and form top flange 7；The sight glass 8 is pacified
Loaded between form bottom flange 6 and form top flange 7, and assemble the sealing of two panels polytetrafluoroethylene (PTFE) pad and a piece of silica gel lining
Pad protection；A piece of window gasket piece 10 is installed to seal between form bottom flange 6 and cylinder body 4, the window gasket piece 10
For teflon gasket；It is logical between form bottom flange 6 and form top flange 7 and form bottom flange 6 and cylinder body 4
It crosses and is bolted.
The scavenging voltage-regulating system includes air inlet 18, scavenging port 12, exhaust outlet 19, upstream pressure control valve 28, flow
Meter 36, high pressure gas cylinder 30, air intake valve 33, scavenging valve 35 and connecting line；The air inlet 18 and scavenging port 12 pass through three
Way pipe fitting 34 is connected with high pressure gas cylinder 30, and valve is arranged on the connecting line of the air inlet 18 and scavenging port 12 and controls opening and closing,
The air inlet 18 is controlled by air intake valve 33 respectively, the scavenging port 12 is controlled by scavenging valve 35；The scavenging port
Flowmeter 36 is provided on the pipeline of 12 connections and controls scavenging flow, in the scavenging port 12 together with the scavenging air pipe of tee pipe fitting 34
Scavenging valve 35 and flowmeter 36 are provided on road 37；On air inlet pipeline 32 of the high pressure gas cylinder 30 together with tee pipe fitting 34
Pressure reducing valve 29 is set；The exhaust outlet 19 connects self-operated type upstream pressure control valve 28 by gas exhaust piping 27, is opened by control
The upstream pressure for opening valve carrys out the pressure adjusting of realization device.
The oil droplet supply system includes the oil storage tank 3, draining road 5, draining piston 1, only oil overhold bar 14 and non-return dress
It sets；It is the oil droplet supply system under hyperbaric environment；The oil storage tank 3 and draining road 5 constitute cylinder oil access, by stopping oil overhold bar
Check device is arranged outside oil overhold bar 14 in 14 control oil circuit opening and closings, described stop, and avoids being acted on only oil overhold bar 14 by high pressure and flies out, institute
3 upper end of oil storage tank insertion draining piston 1 is stated, is squeezed the cylinder oil in pre-existing oil storage tank 3 by draining piston 1 under hyperbaric environment
Enter draining road 5 and is finally attached to scavenging runner 13.
The check device includes limit control plug 15, limit control-rod 16 and limit base 17；Limit control plug 15 with
Limit base 1 is threadedly coupled, and the limit control plug 15 is controlled by the limit control-rod 16, does spiral shell on the limit base 17
Feed motion is revolved, so that limitation stops the movement of oil overhold bar 14, prevents it from flying out.
As shown in fig. 6, the main body of cylinder body 4 has bottom surface and three sides, remaining open side is closed by Scavenge model,
Top opening is closed by cylinder cap 2, and the bottom surface of cylinder body 4 and three sides are machined with the light transmission for installing light transmission form 11 respectively
Form hole 23,23 edge of each light transmission form hole are machined with closure gasket groove 22, and the designated position of cylinder body 4 is machined with solid for connecting
Fixed threaded mounting hole 24.
A kind of application method of the scavenging simulator of above-mentioned adjustable pressure control, comprising the following steps:
S1, the limit control adjusted in check device fill in 15, only oil overhold bar 14 are headed into block 9 in Scavenge model, closing is let out
Cylinder oil is stored in oil storage tank 3 by oil duct 5, connects experiment apparatus.
S2,12 valve of scavenging port is closed, opens 18 valve of air inlet, adjust pressure-control valve upstream pressure to testing item
Part opens hyperbaric environment needed for high pressure gas cylinder forms experiment.
S3, adjusting limit control plug 15 make the only opening of oil overhold bar 14 draining road 5, and adjusting draining piston 1 squeezes into cylinder oil
Scavenging runner 13.
S4,18 valve of air inlet is closed, opens 12 valve of scavenging port, complete experimentation, while optical device is clapped
Take the photograph record.
S5, experiment are completed, and are tested if you need to repeat, and 12 valve of scavenging port is closed, and control draining piston 1 continues to squeeze into cylinder
Oil opens 12 valve of scavenging port and repeats to test.
The scavenging simulator and its application method of adjustable pressure control of the present invention, are present in scavenging for verifying
Whether the cylinder oil on mouth casing wall can enter cylinder with scavenging air-flow forms potential self-ignition point, passes through simulated engine feature structure
And true pressure environment in cylinder, the research burnt and controlled for engine abnormity provide convenience.
The scavenging simulator and its application method of adjustable pressure control of the present invention, are mainly used for studying low speed two
The adjoint cylinder oil kinetic characteristic of the scavenging process in abnormal combustion problem that Stroke Engine cylinder oil spontaneous combustion causes.Outside connects
It connects high pressure gas cylinder, flowmeter and upstream pressure control valve and arranges pipeline, cooperation external optical devices constitute full experiment platform.
Embodiment 1
As shown in Figure 1, the scavenging simulator of the control of adjustable pressure described in the present embodiment, can connect corresponding outside
Equipment, which is built, completes experimental bench, and pressure regulation scavenging system, oil supply system and information acquisition system are arranged altogether.
Air inlet 18, scavenging port 12 and exhaust outlet 19 is arranged in described device, and the air inlet 18 passes through three with scavenging port 12
Way pipe fitting 34 is connected with high pressure gas cylinder guarantees gas supply, and the air inlet 18 is arranged valve with scavenging port 12 and controls opening and closing, described to sweep
Flowmeter is connected before port 12 and controls scavenging flow, and the exhaust outlet 19 connects self-operated type upstream pressure control valve, passes through control
The upstream pressure of Open valve carrys out the pressure adjustable of realization device.
Meanwhile (form specification is just the same, with light transmission form 11 for four light transmission forms 11 of the scavenging simulator setting
Unified representation), information collection is carried out for cooperating optical device shooting to record and connecting computer.
Shown in Fig. 2 and Fig. 3, for this adjustable pressure control scavenging simulator, external structure mainly include cylinder cap 2,
Cylinder body 4, and the Scavenge model being made of block 20 outside block 9 in Scavenge model and Scavenge model, on cylinder cap 2 setting exhaust outlet 19 with
And draining piston 1 installs threaded hole, four forms 11 are arranged in 4 four visible surfaces of cylinder body, and air inlet 18 is arranged in bottom surface, wherein one
A side setting rectangle stops oil overhold bar movement hole and installs check device.
Scavenging air inlet 12 is set on the outer block 20 of Scavenge model and inlet flange 21 is installed, is arranged on block 9 in Scavenge model
Scavenging runner 13, oil storage tank 3, draining road 5 and only 14 channel of oil overhold bar, 1 head of draining piston are installed in oil storage tank 3, bar portion
Cylinder cap 2 is stretched out by piston motion mouth, only oil overhold bar 14 protrudes into block 9 in Scavenge model by the only oil overhold rod aperture of cylinder side wall
Only in oily lift pin passageways, outside is connected with the limit control plug 15 in check device, scavenging port, interior piece, outer piece and correlation
Connector detailed illustration is shown in Fig. 4.
Air inlet 18, scavenging port 12, exhaust outlet 19, external the connect pressure-control valve, flowmeter, high pressure gas of device itself
Bottle, valve and relevant connection pipeline constitute scavenging voltage-regulating system.
The air inlet 18 is connected by tee pipe fitting 34 with high pressure gas cylinder with scavenging port 19 to be guaranteed to supply unobstructed and gas
Body shunts, and valve control is respectively set on the air inlet 18 and the connecting line before scavenging port 19 and is opened and closed, the scavenging port 12
Preceding connection gas mass flow meter controls scavenging flow, connects self-operated type upstream pressure control valve after the exhaust outlet 19, passes through
The upstream pressure of control Open valve carrys out the pressure adjustable of realization device.
The oil storage tank 3 that is arranged on device, draining road 5, piston 1, only oil overhold bar 14 and check device together constitute height
Oil droplet supply system under pressure ring border.
The oil storage tank 3 and draining road 5 being arranged on block 9 in Scavenge model constitute cylinder oil access, and lower part is penetrated through to scavenging
13 edge of runner stops oil overhold bar 14 by the cuboid of side and controls oil circuit opening and closing.
Before experiment starts, only oil overhold bar 14, which is fully inserted into interior piece, blocks 5 access of draining road, and cylinder oil is injected oil storage
Slot 3 is stored in the oil in oil storage tank 3 inside device after installation 1 cylinder cap 2 of piston waits components.1 head of the piston setting three
Road closure gasket groove, close to bar portion together be backup seal annular groove, remaining twice cooperate fluorine glue sealing ring use, prevent air and
Cylinder oil leakage.
After experiment starts, high pressure will only oil overhold bar 14 be released in cylinder, open draining road 5, and control piston 1 squeezes into cylinder oil
Scavenging runner 13 completes oil droplet supply.Check device is set outside the only oil overhold bar 14, avoids being acted on by high pressure and stops oil overhold bar
14 fly out.
As shown in figure 5, the check device includes limit base 17, limit control plug 15 and limit control-rod 16.It is described
Limit control plug 15 is connected through a screw thread with limit base 17, spin on limit base 17 under the control for limiting control-rod 16 into
To movement, so that limitation stops the movement of oil overhold bar 14, prevents its ejection under high pressure effect from flying out and cause danger.
The window 11 of whole device includes sight glass 8, form bottom flange 6 and form top flange 7, the form glass
Glass 8 is installed between form bottom flange 6 and form top flange 7, installs the sealing of two panels polytetrafluoroethylene (PTFE) pad and piece of silicon therebetween
Glue liner protection, installs a piece of teflon gasket 10 and seals between form bottom flange 6 and cylinder body 4, form bottom flange 6 and view
It is bolted between window top flange 7, between bottom flange 6 and cylinder body 4.
The Scavenge model of device includes block 9 and Scavenge model 20 two parts of outer block in Scavenge model, is welded after processing respectively,
Solve the problems, such as overall model processing difficulties, in the Scavenge model the outer block 20 of block 9 and Scavenge model be equipped with threaded hole with
Cylinder body 4 connects, and outer piece 20 outside is equipped with weld groove, and integral solder guarantees air-tightness after the installation is completed, and interior piece 9 setting is swept
Flow channel 13, shape are simulated physical machine scavenging port shaped upper part (position for being most likely to occur oil droplet removing) completely, are guaranteed real
Test the reliability used.
Four light transmission forms 11 are set altogether on 4 bottom surface of device cylinder body and side wall, can external high-speed camera, shoot cylinder body 4
Inner case need to be arranged light source in any form 11 other than the form 11 for shooting when shooting and guarantee field of view, described
Simulator cooperates optical capturing equipment and corresponding computer configuration information acquisition system.
Embodiment 2
The present embodiment is the application method of the scavenging simulator of adjustable pressure described in embodiment 1 control, is specifically included
Following steps:
(a) the limit control plug 15 in check device is adjusted, only oil overhold bar 14 is headed into block 9 in scavenging port model, is closed
Cylinder oil is stored in oil storage tank 3 by draining road 1, is installed piston 1 and cylinder cap 2, is bolted.Connecting line adjusts light
Learn equipment preparation for acquiring image.
(b) close scavenging port 12 before valve, open air inlet 18 before valve, adjust pressure-control valve upstream pressure to
Experiment condition opens high pressure gas cylinder and starts to be vented to pressure-control valve, hyperbaric environment needed for having formed experiment in cylinder at this time.
(c) it adjusts limit control plug 15 and pushes pressure-air and stop oil overhold bar 14 and open draining road, regulating piston 1 will
Cylinder oil squeezes into scavenging runner 13.
(d) valve before air inlet 18 is closed, the valve before opening scavenging port 12 starts scavenging process, while using light
It learns equipment and carries out shooting record.
(e) experiment is completed, and is tested if you need to repeat, the valve before closing scavenging port 12, and control piston 1 continues to squeeze into cylinder
Oil, the valve before opening scavenging port 12 repeat to test.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of scavenging simulator of adjustable pressure control, which is characterized in that including cylinder cap and cylinder body, envelope at the top of the cylinder body
It has closed cylinder cap and has formed high-pressure bottle；
Exhaust outlet and piston motion mouth are provided on the cylinder cap；
In two adjacent sides of the cylinder body, a side is machined with the only oil overhold rod aperture of rectangle, and installs check device, separately
The side wall of one side is provided with Scavenge model；
The Scavenge model includes block and the outer block of Scavenge model in Scavenge model；
Air inlet is arranged in the bottom surface of the cylinder body, scavenging port is arranged on the outer block of the Scavenge model, and install inlet flange, described
Set gradually scavenging runner, draining road, only oily lift pin passageways and oil storage tank in Scavenge model on block from bottom to top；
The head of draining piston is installed in oil storage tank, and bar portion stretches out cylinder cap by the piston motion mouth, and only oil overhold bar passes through
The only oil overhold rod aperture of cylinder side wall protrudes into Scavenge model in the only oily lift pin passageways of block, external to connect with check device；
The oil storage tank, draining road, draining piston, only oil overhold bar and check device form oil droplet supply system；The air inlet,
The a part of scavenging port and exhaust outlet as scavenging voltage-regulating system is connected with other scavenging voltage-regulating system components respectively, is swept
Controlled atmosphere pressure；The visible surface of the cylinder body is provided at least one light transmission form, and information image is delivered in video camera acquisition cylinder body
Information acquisition system；
The oil storage tank and draining road constitute cylinder oil access, control oil circuit opening and closing by stopping oil overhold bar, described to stop outside oil overhold bar
Portion is arranged check device, and the oil storage tank upper end is embedded in draining piston, by draining piston by pre-existing oil storage under hyperbaric environment
Cylinder oil in slot squeezes into draining road and is finally attached to scavenging runner；
The check device includes limit control plug, limit control-rod and limit base；
Limit control plug is threadedly coupled with limit base, and the limit control plug is controlled by the limit control-rod, in the limit
It spins feed motion on the seat of position, so that limitation stops the movement of oil overhold bar.
2. the scavenging simulator of adjustable pressure control according to claim 1, which is characterized in that
Tool is there are four visible surface on the cylinder body, and in four sides of the cylinder body, one of side has Scavenge model, separately
Outer three sides are visible surface, and the bottom surface of the cylinder body is visible surface, and each visible surface is respectively arranged with a light transmission form；
The light transmission form includes sight glass, form bottom flange and form top flange；
The sight glass is installed between form bottom flange and form top flange, and it is close to assemble two panels polytetrafluoroethylene (PTFE) pad
Envelope and a piece of pad of silica gel；
A piece of window gasket piece sealing is installed, which is polytetrafluoroethyl-ne between form bottom flange and cylinder body
Alkene gasket.
3. the scavenging simulator of adjustable pressure control according to claim 1, which is characterized in that
The scavenging voltage-regulating system include air inlet, scavenging port, exhaust outlet, upstream pressure control valve, flowmeter, high pressure gas cylinder,
Air intake valve, scavenging valve and connecting line；
The air inlet and scavenging port are connected by tee pipe fitting with high pressure gas cylinder, the connecting line of the air inlet and scavenging port
Upper setting valve control opening and closing, controls the air inlet by air intake valve respectively, controls the scavenging port by scavenging air valve door；
It is provided with flowmeter control scavenging flow on the pipeline of the scavenging port connection, is pressed before the exhaust outlet connection self-operated type valve
Force control valve is adjusted by controlling the upstream pressure of Open valve come the pressure of realization device.
4. the scavenging simulator of adjustable pressure control according to claim 1, which is characterized in that
The head of the draining piston is provided with three seals annular groove, and what it is close to bar portion is together backup seal annular groove, remaining two
Road closure gasket groove is equipped with fluorine glue sealing ring.
5. the scavenging simulator of adjustable pressure control according to claim 2, which is characterized in that
The high-speed camera of optical capturing equipment shoots cylinder interior situation by the light transmission form, when shooting, need to this thoroughly
Other light transmission forms setting light source other than light window guarantees field of view；
The information acquisition system includes optical capturing equipment and computer.
6. a kind of application method of the scavenging simulator of the control of adjustable pressure described in the claims 1, it is characterised in that
The following steps are included:
S1, the limit adjusted in check device control plug, and only oil overhold bar is headed into block in Scavenge model, draining road is closed, by gas
Cylinder oil is stored in oil storage tank, connects experiment apparatus；
S2, scavenging port valve is closed, opens air inlet valve, adjusted pressure-control valve upstream pressure to experiment condition, open high
Air bottle, which is formed, tests required hyperbaric environment；
S3, adjusting limit control plug make only oil overhold bar opening draining road, and cylinder oil is squeezed into scavenging runner by adjusting draining piston；
S4, air inlet valve is closed, opens scavenging port valve, complete experimentation, while optical device carries out shooting record；
S5, experiment are completed, and are tested if you need to repeat, and scavenging port valve is closed, and control draining piston continues to squeeze into cylinder oil, and opening is swept
Port valve repeats to test.
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| CN201811315466.5A CN109323865B (en) | 2018-11-06 | 2018-11-06 | The scavenging simulator and its application method of adjustable pressure control |
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| CN104392650A (en) * | 2014-11-17 | 2015-03-04 | 张俊杰 | Respirator simulation lung device for emergency nursing |
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