CN102828875A - Oil-water instantaneous emulsifying injector for diesels - Google Patents
Oil-water instantaneous emulsifying injector for diesels Download PDFInfo
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- CN102828875A CN102828875A CN2012103682925A CN201210368292A CN102828875A CN 102828875 A CN102828875 A CN 102828875A CN 2012103682925 A CN2012103682925 A CN 2012103682925A CN 201210368292 A CN201210368292 A CN 201210368292A CN 102828875 A CN102828875 A CN 102828875A
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- valve body
- needle
- nozzle hole
- injector
- spray orifice
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Abstract
The invention relates to a diesel injector comprising an injector body and a needle valve body arranged at the lower end of the injector body, wherein a cushion block is arranged at the joint of the injector body and the needle valve body; the needle valve body is provided with a needle valve body inner cavity; the conical top end of the needle valve body inner cavity has an upper nozzle hole; the top end of the outer part of the needle valve body is a section which is hermetically and fixedly connected with a self-oscillation nozzle; the upper nozzle hole is communicated with an oscillating chamber of the self-oscillation nozzle and a lower nozzle hole; the oscillating chamber is a cylindrical cavity; the lower nozzle hole is a outwards-expanded cone-shaped nozzle hole; communicated water inlet passages are arranged on the injector body, the cushion block and the needle valve body; and the outlet of the water inlet passage is located on the side wall of the oscillating chamber. The injector disclosed by the invention has the advantages that the unstable emulsification of diesel oil can be realized and the ejected fuel oil can enter a combustor to be combusted by keeping an instantaneously-stable state.
Description
Technical field
The present invention relates to a kind of diesel engine part, be specifically related to one type diesel injector.
Background technique
People just study the emulsifying diesel oil blended with water technology since the sixties in last century.Research shows: the fuel consumption rate of emulsifying diesel oil blended with water burning can reduction diesel engine, energy saving.Therefore the emulsifying diesel oil blended with water technology has caused the extensive interest and the attention of Chinese scholars.So-called oil emulsion, oil mixes with water according to a certain percentage exactly, and through stirring or vibration, making water is that the particulate of 0.5～5 μ m is scattered in the oil equably with diameter, and fine water droplets is surrounded and the liquid pearl of formation water-in-oil type by oil film, and color is creamy white.
Experiment shows: the cone angle of diesel oil emulsification fuel spray is spraying early stage less than pure diesel oil, but to its cone angle of middle and later periods obviously greater than pure diesel oil.Because dispersed phase is lower boiling water in the emulsion fuel, continuous phase is diesel oil, and formed emulsion fuel is to belong to water-in-oil type.The burning room temperature constantly raises, and oil droplet at high temperature is heated, and the water in mutually is in superheat state, and saturation vapour pressure increases to is enough to make oil droplet broken, and so-called " microexplosion " phenomenon promptly takes place.Owing to the generation of " microexplosion " makes oil droplet broken, water vapor diffuses in the spraying, thereby fuel spray is expanded, and cone angle increases.This phenomenon has shown that under hot environment, emulsion fuel has the secondary-atomizing effect, has promoted the vaporization of diesel oil, thereby has improved atomization quality, makes diesel combustion rapider, and is more complete.
The emulsification of diesel oil is divided into stable emulsion and instability (transient) emulsification according to its stability.Stable emulsion oil is long stabilization time; Profit can layering; But need utilize surface active agent (emulsifier); It is a kind of amphiphile, amphiphilic molecule that comprises hydrophilic radical and lipophilic group, can be divided into ionic surfactant, nonionic surface active agent, amphoteric surfactant and high molecular type surfactant.Ionic surfactant can be divided into anionic surfactant, cationic surfactant and zwitterionic surfactant again.This type emulsifier costs an arm and a leg, and cost is high, and on physics and chemical property, has some differences by the diesel oil emulsification that emulsifier produces with general diesel oil; Mainly show aspects such as stability, flammability and corrosivity; Because these differences make stable diesel oil emulsification occur a lot of problems, for example ignition difficulties in actual use; Poor mobile performances etc. are not so this so far technology is applied yet; Unstable emulsification is meant that stabilization time is very short, burns but can stably get in the firing chamber after needing assurance to come out from oil sprayer.The objective of the invention is under the constant basically condition of the structure of existing diesel injection system; The structure that only changes oil nozzle makes it can realize atomisation; And can water be introduced oscillation chamber again and form the ejection of unstable oil emulsion; Can stably get in the firing chamber after the ability assurance is come out from oil sprayer and burn, all not see similar research report up to now both at home and abroad.
Chinese patent document CN102619663A discloses " a kind of self oscillations atomizer nozzle that is used for diesel injector " on August 1st, 2012; Its structure is as shown in Figure 1; It includes needle-valve body 2, and the conical tip of needle-valve body inner chamber 3 offers a top nozzle hole 7, and needle-valve body 2 outer tip end are the cross section; This cross section and self oscillations nozzle 9 are sealedly and fixedly connected; Said top nozzle hole 7 is connected with the oscillation chamber 8 of self oscillations nozzle 9, following spray orifice 10, and oscillation chamber 8 is a cylindrical cavity, the taper spray orifice of following spray orifice 10 for expanding outwardly; Wherein, The diameter of oscillation chamber 8 is that 1.5～8.8 times of top nozzle hole 7 diameters, the length of oscillation chamber 8 are 2～3 times of top nozzle hole 7 diameters; The internal orifice diameter of following spray orifice 10 is that the length of 1～2 times, time spray orifice 10 of top nozzle hole 7 diameters is 2 times of following spray orifice 10 internal orifice diameters, and the cone expansion angle of following nozzle bore 10 is 35～70 °.
This self oscillations atomizer nozzle relies on pressure and the specific standard of oscillation chamber 8 and the boundary conditions of following spray orifice of oil duct 1 on the needle-valve body 2; Make fuel oil become the pulsation spraying; The pressure peak that flows out is higher than (15～30) % of inlet pressure; And make the outlet fuel oil obtain more uniform, solid atomizing effect, strengthen firing effect, but it can not realize emulsifying diesel oil blended with water.
Summary of the invention
Technical problem to be solved by this invention provides the instantaneous emulsification oil sprayer of a kind of use for diesel engine profit, and it can realize the unstable emulsification of diesel oil, can realize that again the fuel oil that sprays is enough to keep instantaneous stable status to get in the firing chamber and burns.
Technical problem to be solved by this invention is to realize through such technological scheme; It includes injector body and the needle-valve body that is installed in the injector body lower end, in injector body and needle-valve body junction cushion block is housed, and needle-valve body has the needle-valve body inner chamber; The conical tip of needle-valve body inner chamber offers a top nozzle hole; The needle-valve body outer tip end is the cross section, and this cross section is fixedly connected with the self oscillations sealed nozzle, and said top nozzle hole is connected with the oscillation chamber of self oscillations nozzle, following spray orifice; Oscillation chamber is a cylindrical cavity, and following spray orifice is the taper spray orifice that expands outwardly; Wherein, The diameter of oscillation chamber is that 1.5～8.8 times of the top nozzle bore dia, the length of oscillation chamber are 2～3 times of top nozzle bore dia; The internal orifice diameter of following spray orifice is that the length of 1～2 times, time spray orifice of top nozzle bore dia is 2 times of following spray orifice internal orifice diameter, and the cone expansion angle of following nozzle bore is 50～70 °; On injector body, cushion block and needle-valve body, offer the inlet channel of connection, the outlet of this inlet channel is positioned on the sidewall of oscillation chamber.
Because the self oscillations nozzle can produce the self oscillations atomizing with diesel oil in oscillation chamber; Flow into the water generates emulsifying diesel oil blended with water of oscillation chamber simultaneously through inlet channel; Form unstable emulsification; Subsequently, the following spray orifice of oscillation chamber sprays into the diesel oil of unstable emulsification in the firing chamber, has realized that the diesel oil of unstable emulsification keeps burning in the instantaneous stable status entering firing chamber.The present invention has following advantage: can realize the unstable emulsification of diesel oil, can realize that again the fuel oil that sprays is enough to keep instantaneous stable status to get into the firing chamber and burns.Oil sprayer of the present invention sprays into and flame temperature is reduced and keeps stable, has reduced the toxic emission of diesel engine, and has avoided stable diesel oil emulsification ignition difficulties, defectives such as poor mobile performance.
Description of drawings
Description of drawings of the present invention is following:
Fig. 1 is the structural representation of the self oscillations atomizer nozzle of background technique;
Fig. 2 is a structural representation of the present invention.
Among the figure: 1. oil duct; 2. needle-valve body; 3. needle-valve body inner chamber; 7. top nozzle hole; 8. oscillation chamber; 9. self oscillations nozzle; 10. descend spray orifice; 20. injector body; 21. cushion block; 22. inlet channel.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
As shown in Figure 2; The present invention includes injector body 20 and the needle-valve body 2 that is installed in injector body 20 lower ends, realize the two be connected and sealing with needle-valve body 2 junctions with cushion block 21 in injector body 20, needle-valve body 2 has needle-valve body inner chamber 3; The conical tip of needle-valve body inner chamber 3 offers a top nozzle hole 7; Needle-valve body 2 outer tip end are the cross section, and this cross section and self oscillations nozzle 9 are sealedly and fixedly connected, and said top nozzle hole 7 is connected with the oscillation chamber 8 of self oscillations nozzle 9, following spray orifice 10; Oscillation chamber 8 is a cylindrical cavity, the taper spray orifice of following spray orifice 10 for expanding outwardly; Wherein, The diameter of oscillation chamber 8 is that 1.5～8.8 times of top nozzle hole 7 diameters, the length of oscillation chamber 8 are 2～3 times of top nozzle hole 7 diameters; The internal orifice diameter of following spray orifice 10 is that the length of 1～2 times, time spray orifice 10 of top nozzle hole 7 diameters is 2 times of following spray orifice 10 internal orifice diameters, and the cone expansion angle of following nozzle bore 10 is 50～70 °; Its main points are: on injector body 20, cushion block 21 and needle-valve body 2, offer the inlet channel 22 of connection, the outlet of this inlet channel 22 is positioned on the sidewall of oscillation chamber 8.
Because the present invention is the basis of the patent application " a kind of self oscillations atomizer nozzle that is used for diesel injector " of quoting in background technique; On the sidewall of oscillation chamber 8, offer the outlet of an inlet channel 22; That is to say that oscillation chamber 8 interior has three apertures; One of them is high pressure filler opening (top nozzle hole 7), and one is oil outlet (following spray orifice 10), and another is the outlet of negative pressure inlet channel 22; In oscillation chamber 8, accomplish oil spout and water inlet automatically, water is got in the oscillation chamber 8 along inlet channel 22 by water intake under the barometric pressure effect.
The present invention can separate storage with oil, water, keep its primary characteristic, after You Heshui gets into oscillation chamber 8, carries out the self oscillations atomizing and mixes the unstable oil emulsion of generation; Spraying into the firing chamber by self oscillations nozzle 9 again burns; In combustion process, the burning room temperature constantly raises, because dispersed phase is lower boiling water in the emulsion fuel; Continuous phase is diesel oil, and formed emulsion fuel is to belong to water-in-oil type.When oil droplet at high temperature is heated, the water in mutually is in superheat state, and saturation vapour pressure increases to is enough to make oil droplet broken, and " microexplosion " phenomenon promptly takes place.Owing to the generation of " microexplosion " makes oil droplet broken, water vapor diffuses in the spraying, thereby fuel spray is expanded, and cone angle increases.This phenomenon has shown that under hot environment, emulsion fuel has the secondary-atomizing effect, has improved atomization quality; Make the fuel oil fragmentation atomize more carefully sooner; Thereby improve the combustion process of diesel engine, improve the power character and the Economy of diesel engine, reduce the discharging of soot and particulate.In addition, because the combustion flame temperature of emulsified fuel is low, can suppress nitrogen oxide (NO effectively
X) generation, make the NO of diesel engine
XDischarge amount reduces.Therefore the present invention can reduce the physical environment infringement that nitrogen oxide causes to greatest extent.
As shown in Figure 2, needle-valve body inner chamber 3, top nozzle hole 7, oscillation chamber 8 and following spray orifice 10 are installed on the same center line.
Claims (2)
1. the instantaneous emulsification oil sprayer of use for diesel engine profit; Include injector body (20) and be installed in the needle-valve body (2) of injector body (20) lower end; In injector body (20) and needle-valve body (2) junction cushion block (21) is housed; Needle-valve body (2) has needle-valve body inner chamber (3), and the conical tip of needle-valve body inner chamber (3) offers a top nozzle hole (7), and needle-valve body (2) outer tip end is the cross section; This cross section and self oscillations nozzle (9) are sealedly and fixedly connected; Said top nozzle hole (7) is connected with the oscillation chamber (8) of self oscillations nozzle (9), following spray orifice (10), and oscillation chamber (8) is a cylindrical cavity, the taper spray orifice of following spray orifice (10) for expanding outwardly; Wherein, The diameter of oscillation chamber (8) is that 1.5～8.8 times of top nozzle hole (7) diameter, the length of oscillation chamber (8) are 2～3 times of top nozzle hole (7) diameter; The internal orifice diameter of following spray orifice (10) is that the length of 1～2 times, time spray orifice (10) of top nozzle hole (7) diameter is 2 times of following spray orifice (10) internal orifice diameter, and the cone expansion angle of following nozzle bore (10) is 50～70 °; It is characterized in that: on injector body (20), cushion block (21) and needle-valve body (2), offer the inlet channel (22) of connection, the outlet of this inlet channel (22) is positioned on the sidewall of oscillation chamber (8).
2. the instantaneous emulsification oil sprayer of profit according to claim 1 is characterized in that, needle-valve body inner chamber (3), top nozzle hole (7), oscillation chamber (8) and following spray orifice (10) are installed on the same center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103682925A CN102828875A (en) | 2012-09-28 | 2012-09-28 | Oil-water instantaneous emulsifying injector for diesels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103682925A CN102828875A (en) | 2012-09-28 | 2012-09-28 | Oil-water instantaneous emulsifying injector for diesels |
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| Publication Number | Publication Date |
|---|---|
| CN102828875A true CN102828875A (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103682925A Pending CN102828875A (en) | 2012-09-28 | 2012-09-28 | Oil-water instantaneous emulsifying injector for diesels |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240095A (en) * | 2015-11-19 | 2016-01-13 | 大连海事大学 | SCR system self-oscillation pulse atomization nozzle applied to marine diesel engine |
| CN110573721A (en) * | 2017-03-13 | 2019-12-13 | A.P.莫勒-马斯克公司 | Fuel injection system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158153A (en) * | 1995-08-10 | 1997-08-27 | 罗伯特·博施有限公司 | Fuel injection valve |
| CN101506509A (en) * | 2006-06-29 | 2009-08-12 | 不列颠哥伦比亚大学 | Concurrent injection of liquid and gaseous fuels in an engine |
| CN201391401Y (en) * | 2009-04-23 | 2010-01-27 | 雷新国 | Oil-water mixture ejector |
| CN102619663A (en) * | 2012-04-23 | 2012-08-01 | 重庆大学 | Self-excited oscillation atomizing nozzle for oil injector of diesel engine |
-
2012
- 2012-09-28 CN CN2012103682925A patent/CN102828875A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158153A (en) * | 1995-08-10 | 1997-08-27 | 罗伯特·博施有限公司 | Fuel injection valve |
| CN101506509A (en) * | 2006-06-29 | 2009-08-12 | 不列颠哥伦比亚大学 | Concurrent injection of liquid and gaseous fuels in an engine |
| CN201391401Y (en) * | 2009-04-23 | 2010-01-27 | 雷新国 | Oil-water mixture ejector |
| CN102619663A (en) * | 2012-04-23 | 2012-08-01 | 重庆大学 | Self-excited oscillation atomizing nozzle for oil injector of diesel engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240095A (en) * | 2015-11-19 | 2016-01-13 | 大连海事大学 | SCR system self-oscillation pulse atomization nozzle applied to marine diesel engine |
| CN110573721A (en) * | 2017-03-13 | 2019-12-13 | A.P.莫勒-马斯克公司 | Fuel injection system |
| CN110573721B (en) * | 2017-03-13 | 2021-12-17 | A.P.莫勒-马斯克公司 | Slurry fuel injector valve and fuel supply valve for slurry fuel injector valve |
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Application publication date: 20121219 |