CN116753101A - Ultrasonic air atomization diesel oil preheating plug - Google Patents
Ultrasonic air atomization diesel oil preheating plug Download PDFInfo
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- CN116753101A CN116753101A CN202310298898.4A CN202310298898A CN116753101A CN 116753101 A CN116753101 A CN 116753101A CN 202310298898 A CN202310298898 A CN 202310298898A CN 116753101 A CN116753101 A CN 116753101A
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- 239000002283 diesel fuel Substances 0.000 title claims abstract description 51
- 238000000889 atomisation Methods 0.000 title claims abstract description 50
- 239000000446 fuel Substances 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 7
- 239000003595 mist Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 83
- 239000007788 liquid Substances 0.000 claims description 25
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004939 coking Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 39
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides an ultrasonic air atomization diesel oil preheating plug, which is arranged on an air inlet flame preheating plug by selecting an ultrasonic air atomization oil sprayer to replace a traditional oil sprayer, and is used for solving the problems of poor atomization effect, coking and carbon deposition of the traditional flame preheating plug in a low-temperature environment. The device comprises an ultrasonic air atomization oil injector and an air inlet flame preheating plug main body structure; the ultrasonic air atomization fuel injector breaks and atomizes diesel oil drops under the action of ultrasonic waves, and sprays the diesel oil drops into the main structure of the air intake flame preheating plug in an oil mist state, and the diesel oil drops are fully mixed with air to contact the air to form combustible mixed gas, so that high-temperature flame is formed in a high-temperature environment in the main structure of the air intake flame preheating plug.
Description
Technical Field
The invention relates to the technical field of low-temperature cold start preheating of diesel engines, in particular to an ultrasonic air atomization diesel oil preheating plug.
Background
The diesel engine has low air inlet temperature in low temperature environment, high engine oil viscosity, poor diesel atomization effect, and far lower in-cylinder temperature and pressure when compressing the top dead center than the conventional working condition, so that the formation of in-cylinder mixed gas and the deterioration of the combustion process are caused, and the problems of difficult starting, poor dynamic property, serious emission pollution and the like of the diesel engine are caused.
One common type of diesel cold start auxiliary device is an intake flame glow plug. The conventional oil supply modes of the flame glow plug generally have two modes: one is that the diesel oil flows through the surface of the heating rod to be heated, gasified and evaporated by the high temperature wall surface, and then is ignited in the flame cover, and the glow plug fires and heats the air intake of the engine; the other is jetting type, diesel oil is jetted from a porous oil injector, atomized and evaporated by interaction with surrounding air, then is collided with a heating rod, finally is ignited by the high-temperature wall surface of the heating rod, and the glow plug ignites to heat air entering the engine.
However, for the flow oil type glow plug, the liquid diesel oil directly contacts the high-temperature wall surface of the heating rod, so that the diesel oil is coked and blocked for a long time, and the failure rate is extremely high. For jet glow plugs, the diesel oil temperature is lower, the viscosity is higher in extremely cold environments, and the ability of air flow to induce diesel oil droplet break-up is also weak due to the low engine speed during glow plug firing. In addition, the traditional fuel injector installed on the existing preheating plug is single in atomization mode, the atomization effect of the traditional fuel injector is improved along with the increase of the flow speed of an atomization medium mainly through the ejection of high-speed air flow to impact oil liquid to form tiny liquid drops, so that the atomization effect of the traditional fuel injector can be limited by the flow speed of the atomization medium and the oil pressure, the atomization particle size is large, the atomization effect under a low-temperature environment is poor, and the utilization efficiency of diesel oil is low. Not only can coking of the nozzle be easily caused, but also the diesel oil sprayed by the glow plug fuel injector can be easily caused to adhere to the heating rod. On one hand, the low-temperature diesel oil increases heat exchange loss of the heating rod, so that the temperature of the heating rod is reduced, and the diesel oil is difficult to ignite; on the other hand, diesel oil adheres to the heating rod, which results in an excessively low air-fuel ratio in the vicinity of the heating rod, and insufficient air quantity, and it is difficult to ignite the diesel oil. The severe cold conditions place higher demands on the atomization effect of the flame glow plug injectors,
disclosure of Invention
In view of the above, the invention provides an ultrasonic air atomization diesel oil preheating plug, which is arranged on an air inlet flame preheating plug by selecting an ultrasonic air atomization oil injector to replace a traditional oil injector, so as to solve the problems of poor atomization effect, coking and carbon deposition of the traditional flame preheating plug in a low-temperature environment. The specific technical scheme is as follows:
an ultrasonic air atomization diesel oil preheating plug comprises an ultrasonic air atomization oil sprayer and an inlet flame preheating plug main body structure; the ultrasonic air atomization fuel injector breaks and atomizes diesel oil drops under the action of high-frequency ultrasonic waves, and sprays the diesel oil drops into the main structure of the air intake flame preheating plug in an oil mist state, and the diesel oil drops are fully mixed with air to contact the air to form combustible mixed gas, so that high-temperature flame is formed in a high-temperature environment in the main structure of the air intake flame preheating plug.
The ultrasonic air atomization oil sprayer comprises an oil inlet, a flow guide pipe, a nozzle, an ultrasonic generator, an air inlet and a liquid flow passage; compressed gas enters from an air inlet, enters a nozzle through a flow guide pipe, vertically impacts oil entering from an oil inlet and flowing into the nozzle through a liquid flow passage, liquefies the oil into small liquid drops, and then linearly impacts an ultrasonic generator arranged at the front end of the nozzle again through an outlet of the nozzle at an ultra-high speed close to the sound velocity to generate ultrasonic waves.
The oil inlet is positioned on the side surface of the ultrasonic air atomization oil sprayer; the air inlet is positioned at the top of the ultrasonic air atomization oil sprayer; the honeycomb duct is a venturi; the liquid flow passage is arranged in parallel with the flow guide pipe and is finally communicated with the nozzle.
The main body structure of the air inlet flame preheating plug comprises a preheating plug shell and an ignition heat dissipation structure; the glow plug shell consists of two parts, namely a fixed seat of the head part and a flame cover at the bottom; the ignition heat dissipation structure is fixed on the fixed seat and arranged in the flame cover and used for burning combustible mixed gas formed by mixing atomized diesel vapor and air.
The flame cover is provided with a plurality of ventilation holes, and the shape, the number and the position of the ventilation holes are adjustable.
The ignition heat dissipation structure comprises a heating pipe and a heating rod; the fixing seat is provided with a through hole for inserting and fixing the heating rod; the lower end of the fixing seat is provided with a heating pipe, part of the heating area of the heating rod is wrapped by the heating pipe, and the heating area of the heating rod which is not wrapped is exposed in the flame cover and is used for the heating rod to contact and ignite diesel oil vapor.
One or more heating pipes are arranged, and one heating rod wraps one heating pipe; when a plurality of heating pipes are arranged, the heating rods are connected by connecting plate ribs; the heating rod is powered by an energizing bolt arranged at the upper end of the fixing seat.
The heating tube is three-quarter round tubular structure, and the connecting plate rib is processed with the through-hole, is convenient for ventilation air and diesel oil steam.
Advantageous effects
1. The invention has the advantages of large atomization treatment capacity, simple structure and reliable work.
2. The ultrasonic air atomization oil sprayer designed by the invention remarkably improves the atomization effect by adopting a twice crushing and atomizing mode for diesel oil. Firstly, oil liquid entering a nozzle through a liquid flow channel is vertically impacted by high-speed gas, so that the oil is liquefied into small liquid drops; then, the ultrasonic wave is generated by linearly impacting an ultrasonic generator arranged at the front end of the nozzle again through the nozzle outlet, and the ultrasonic wave atomizes the oil again. The invention has the characteristics of small atomization particle size and good uniformity of atomization liquid drops, and the atomization particle size is 4-6 times smaller than that of the best diesel burner reported in China and can reach 10 mu m.
3. The heating rods are used for wrapping the heating pipes, and the plurality of heating rods are connected through the connecting plate ribs, so that the heat dissipation area can be increased, the environmental problem is improved, the ignition probability of the flame preheating plug in a low-temperature severe environment is improved, and the structural stability is also improved.
4. The heating rod is used for partially wrapping the heating area of the heating pipe, so that the ignition of fuel oil is facilitated. Since the temperature of the heating rod is highest, a part of the heating rod leaks out, so that the heating rod can be ensured to be contacted with the fuel oil, and the fuel oil can be ignited.
5. The flame cover is provided with the plurality of ventilation holes, so that atomized oil and air can be fully mixed for combustion.
6. The invention ensures that the diesel oil is fully atomized and smoothly combusted in a low-temperature extremely cold environment, and avoids a large amount of liquid diesel oil from contacting the heating rod and the heating tube, thereby reducing the adhesion of the diesel oil on the heating rod and solving the problems of coking, carbon deposition and the like of the traditional glow plug.
7. In a comprehensive view, the ultrasonic air atomization flame preheating plug solves the problems of poor diesel oil atomization effect and difficult ignition of the traditional flame preheating plug in a low-temperature environment, can effectively enhance the oil-gas mixing process, improve the air inlet temperature, shorten the flame retardant period and ensure the smooth starting of a diesel engine in the low-temperature environment.
Drawings
Fig. 1 (a) is a schematic diagram of the left-view internal structure of the present invention.
Fig. 1 (b) is a schematic diagram of the internal structure of the front view of the present invention.
Fig. 2 (a) is a schematic diagram of the internal structure of an ultrasonic air mist sprayer used in the present invention.
Fig. 2 (b) is a schematic diagram of the internal structure of an ultrasonic air mist sprayer labeled with a liquid flow path.
Fig. 3 is a schematic view of the external structure of the present invention.
FIG. 4 is a schematic illustration of the operational position of the flame glow plug in an engine.
1. The device comprises an energizing bolt, 2, a fixing seat, 3, a screw, 4, a heating tube, 5, a connecting plate rib, 6, a heating rod, 7, a vent hole, 8, a flame cover, 9, an ultrasonic air atomization oil sprayer, 10, an oil sprayer fixing threaded hole, 11, a mixing air cavity, 12, an oil inlet, 13, a base, 14, a flow guide tube, 15, a nozzle, 16, an ultrasonic generator, 17, an air inlet, 18 and a liquid flow passage.
Detailed Description
For the purposes of promoting an understanding of the principles of the invention, reference will now be made in detail to the embodiments of the invention, examples of which are illustrated in the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The invention provides an ultrasonic air atomization diesel oil preheating plug, the internal principle of which is shown in fig. 1 (a) and 1 (b). The method specifically comprises the following steps: the air-atomizing device comprises an energizing bolt 1, a fixing seat 2, a screw 3, a heating tube 4, a connecting plate rib 5, a heating rod 6, a vent hole 7, a flame cover 8, an ultrasonic air-atomizing oil sprayer 9, an oil sprayer fixing threaded hole 10, a mixing air cavity 11 and the like.
As shown in fig. 2 (a), the internal structure of the ultrasonic air atomizing injector 9 is schematically shown. The method specifically comprises the following steps: an oil inlet 12, a base 13, a flow guide pipe 14, a nozzle 15, an ultrasonic generator 16, an air inlet 17 and the like. The direction of the arrow in fig. 2 (b) indicates the direction of the liquid flow path 18.
As shown in fig. 3, an external structure of the present invention is schematically shown.
The invention has the internal structure principle that:
the glow plug shell consists of two parts, namely a boss-shaped fixing seat 2 at the head part and a square tube-shaped flame cover 8 at the bottom. In this embodiment, two heating rods 6 are adopted, two through holes are formed in the fixing seat 2 to insert and fix the heating rods 6, and threaded holes 10 are formed to fix the ultrasonic air atomization injector 9. The flame cover 8 is provided with a plurality of circular vent holes 7, the shape, the number and the positions of the vent holes 7 can be set according to the requirements and the actual conditions, and the mixing air cavity 11 is positioned in the flame cover 8, so that atomized diesel steam and air can be fully mixed to form combustible mixed gas.
The heating rod 6 can be inserted into two through holes on the fixing seat 2, and the heating rod 6 is heated by the energizing bolt 1. The lower extreme of fixing base 2 is equipped with two symmetrical heating tube 4, and heating rod 6 generates heat the regional parcel by heating tube 4, and heating tube 4 is three-quarter tubular structure, and part surface of heating rod 6 exposes in flame cover 8 through heating tube 4's breach, is convenient for heating rod 6 contact and ignite diesel oil steam. The two heating pipes 4 are connected through the connecting plate ribs 5, and a row of through holes are formed in the connecting plate ribs 5, so that air and diesel oil steam can circulate conveniently.
The ultrasonic air atomization oil sprayer 9 consists of an oil inlet 12, a base 13, a flow guide pipe 14, a nozzle 15, an ultrasonic generator 16 and an air inlet 17. The oil inlet 12 is positioned on the side surface of the ultrasonic air atomization oil sprayer 9 and can be externally connected with an oil inlet quick plug to provide diesel oil. The air inlet 17 is positioned at the bottom of the ultrasonic air atomization oil sprayer 9 and can be externally connected with an air inlet quick connector to provide high-pressure air. The outer ring of the base 13 is threaded so that the ultrasonic air atomization injector 9 is fixed in the threaded hole 10 of the fixed seat 2. The draft tube 14 is a venturi tube and directs the flow of gas from a coarse taper to accelerate the flow rate of the gas so that the gas forms a low pressure zone at the outer periphery of the venturi tube outlet. The oil-gas mixture can be ejected through a nozzle 15, and an ultrasonic generator 16 is arranged at the head of the ultrasonic air atomization oil atomizer 9, and can generate ultrasonic waves when being impacted.
The working process of the invention is as follows:
the power supply is turned on, the heating rod 6 is electrified to heat, the surface temperature is continuously increased, and the heating rod 6 transfers heat to the heating tube 4, so that the temperature is also increased. After the heating rod 6 and the heating tube 4 are heated for a period of time, the temperature of the heating rod reaches the ignition point of atomized diesel oil, compressed gas enters from the air inlet 17 of the ultrasonic air atomization oil sprayer 9, vertically impacts oil flowing out from the liquid inlet through the liquid flow passage through the tapered air passage in the guide tube 14, liquefies the oil into small liquid drops, linearly impacts the ultrasonic generator 16 arranged at the front end of the nozzle 15 again through the outlet of the nozzle 15 at an ultra-high speed close to the sound velocity, the impact force of the fluid can excite the resonant cavity of the ultrasonic generator 16 to vibrate to generate ultrasonic waves, and the diesel liquid drops are crushed and atomized under the action of high-frequency ultrasonic waves and are sprayed out in an oil mist state together with air flow.
As is known from the theory of surface tension wave, when the surface of diesel oil droplets vibrates under the excitation of ultrasonic waves, tension waves are generated by the surface tension of diesel oil droplets to prevent the vibration, and when the amplitude of the tension waves is large to a certain critical value, the droplets are broken and atomized. Therefore, the diesel atomized liquid drops are finer and finer, and the diesel liquid drops with the size of a few micrometers can be obtained under the action of the vibration frequency of ultrasonic waves. Thus, excellent diesel oil atomization effect can be obtained in a low-temperature extremely cold environment.
The sprayed atomized diesel oil can fully contact with the exposed parts of the heating tube 4 and the heating rod 6, and is vaporized under the action of high temperature, part of atomized diesel oil can be vaporized under the action of high temperature on the other side of the heating tube 4 through the through hole on the connecting plate, the vaporized diesel oil is fully mixed and contacted with air in the mixing air cavity 11 in the flame cover 8 to form combustible mixed gas, and the combustible mixed gas is ignited and burned under the ignition of the high-temperature heating rod 6 and the heating tube 4 to form high-temperature flame. Therefore, the air inlet flame preheating plug can generate stable flame to heat air inlet under a low-temperature environment so as to ensure that the engine is started smoothly.
As shown in fig. 4, the working position of the intake flame glow plug is schematically shown, and by installing the intake flame glow plug at the front end of the intake manifold, igniting diesel oil by using the high-temperature wall surface of the heating rod 6, spraying high-temperature flame from the vent hole 7 and rapidly increasing the intake air temperature, preheating the intake air, so that the cylinder temperature at the time of compressing the top dead center exceeds the critical spontaneous combustion temperature of diesel oil spraying, improving diesel oil atomization, increasing cylinder pressure, shortening the flame-retarding period and obviously improving the cold start performance of the diesel engine.
Claims (8)
1. An ultrasonic air atomizing diesel oil preheating plug which is characterized in that: comprises an ultrasonic air atomization oil injector (9) and an intake flame glow plug main body structure; the ultrasonic air atomization fuel injector (9) breaks and atomizes diesel oil drops under the action of high-frequency ultrasonic waves, and sprays the diesel oil drops into the main structure of the air intake flame preheating plug in an oil mist state, and the diesel oil drops are fully mixed with air to contact the main structure of the air intake flame preheating plug to form combustible mixed gas, so that high-temperature flame is formed in a high-temperature environment in the main structure of the air intake flame preheating plug.
2. An ultrasonic air atomized diesel glow plug according to claim 1, wherein: the ultrasonic air atomization oil sprayer (9) comprises an oil inlet (12), a flow guide pipe (14), a nozzle (15), an ultrasonic generator (16), an air inlet (17) and a liquid flow passage (18); compressed gas enters from an air inlet (17), enters a nozzle (15) through a flow guide pipe (14), vertically impacts oil entering from an oil inlet (12) and flowing into the nozzle (15) through a liquid flow passage (18), liquefies the oil into small liquid drops, and then linearly impacts an ultrasonic generator (16) arranged at the front end of the nozzle (15) again through the outlet of the nozzle (15) at an ultra-high speed close to the sound velocity to generate ultrasonic waves.
3. An ultrasonic air atomized diesel glow plug according to claim 2, wherein: the oil inlet (12) is positioned on the side surface of the ultrasonic air atomization oil sprayer (9); the air inlet (17) is positioned at the top of the ultrasonic air atomization oil sprayer (9); the flow guide pipe (14) is a venturi; the liquid flow channels (18) are arranged in parallel with the flow guide pipe (14) and are finally communicated with the nozzles (15).
4. An ultrasonic air atomized diesel glow plug according to claim 1 or 3, characterised by: the main body structure of the air inlet flame preheating plug comprises a preheating plug shell and an ignition heat dissipation structure; the glow plug shell consists of two parts, namely a fixed seat (2) of the head part and a flame cover (8) of the bottom part; the ignition heat dissipation structure is fixed in the fixing seat (2) and is arranged in the flame cover (8) for burning the combustible mixed gas formed by mixing atomized diesel vapor and air.
5. An ultrasonic air atomized diesel glow plug according to claim 4, wherein: the flame cover (8) is provided with a plurality of vent holes (7), and the shape, the number and the position of the vent holes (7) are adjustable.
6. An ultrasonic air atomized diesel glow plug according to claim 5, wherein: the ignition heat dissipation structure comprises a heating pipe (4) and a heating rod (6); the fixing seat (2) is provided with a through hole for inserting and fixing the heating rod (6); the lower end of the fixing seat (2) is provided with a heating pipe (4), a part of heating area of the heating rod (6) is wrapped by the heating pipe (4), and the heating area of the heating rod (6) which is not wrapped is exposed in the flame cover (8) for the heating rod (6) to contact and ignite diesel oil vapor.
7. An ultrasonic air atomized diesel glow plug according to claim 6, wherein: one or more heating pipes (4) are arranged, and a heating rod (6) wraps one heating pipe (4); when the number of the heating pipes (4) is multiple, the heating rods (6) are connected by the connecting plate ribs (5); the heating rod (6) is powered by an energizing bolt (1) arranged at the upper end of the fixed seat (2).
8. An ultrasonic air atomized diesel glow plug according to claim 7, wherein: the heating tube (4) is of a three-quarter round tubular structure, and the connecting plate ribs (5) are provided with through holes, so that air and diesel oil steam can circulate conveniently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310298898.4A CN116753101A (en) | 2023-03-24 | 2023-03-24 | Ultrasonic air atomization diesel oil preheating plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310298898.4A CN116753101A (en) | 2023-03-24 | 2023-03-24 | Ultrasonic air atomization diesel oil preheating plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116753101A true CN116753101A (en) | 2023-09-15 |
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ID=87955915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310298898.4A Pending CN116753101A (en) | 2023-03-24 | 2023-03-24 | Ultrasonic air atomization diesel oil preheating plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116753101A (en) |
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2023
- 2023-03-24 CN CN202310298898.4A patent/CN116753101A/en active Pending
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