CN104948368A - Mechanical disturbance atomizing oil nozzle - Google Patents
Mechanical disturbance atomizing oil nozzle Download PDFInfo
- Publication number
- CN104948368A CN104948368A CN201510216608.2A CN201510216608A CN104948368A CN 104948368 A CN104948368 A CN 104948368A CN 201510216608 A CN201510216608 A CN 201510216608A CN 104948368 A CN104948368 A CN 104948368A
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- China
- Prior art keywords
- oil nozzle
- protruding structure
- mechanical disturbance
- orifice
- atomizing
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- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to a mechanical disturbance atomizing oil nozzle in the field of mechanical design and manufacturing. The mechanical disturbance atomizing oil nozzle comprises a needle valve, a needle valve body and a protruding structure. The protruding structure is a protruding pointed rotating body and located below the inner side of an orifice outlet of the oil nozzle; the maximum height of the protruding structure is 0.1-0.15 times of the diameter of an orifice; the maximum length of the protruding structure distributed along the circumferential direction of the orifice is 0.1-0.15 times of the diameter of the orifice; the oil nozzle is a porous oil nozzle. Under same injection pressure, atomizing performance of the oil nozzle is further improved, distribution of spray droplets in a combustor space is optimized, the mixing process of fuel/air is promoted, combustion is optimized, and contributions are made to high efficiency and low emission of diesel engines.
Description
Technical field
The invention belongs to Machine Design and manufacture field, be specifically related to a kind of mechanical disturbance atomizing fuel spray nozzle.
Background technique
Present Domestic diesel injector market is monopolized by overseas enterprise, and domestic oil sprayer design and manufacture technology needs improvement badly, so the oil nozzle designing atomization superior just seems particularly important.Now by the method that can improve atomization approved in the industry be promote injection pressure (as current common rail electric-controlling injection system can provide the jet pressure of about 250MPa), but too high injection pressure adds manufacture requirements and the precision of the accurate coupling part of oil sprayer, improve the manufacturing cost of the accurate coupling part of oil sprayer, so improve oil nozzle design, manufacture and advantageously become in the oil nozzle of fuel-oil atmozation the effective way reduced costs.The research of spray stream atomization mechanism is shown, boundary conditions suddenlys change, turbulent flow and cavitation are three kinds of principal elements that jet initial table ground roll produces, and the first atomization of jet to be the initial table ground roll produced under above three kinds of factor actings in conjunction occur under air effect process that unstability increases, so strengthen the first atomization that jet surface initial disturbance can promote jet, and the intensity controlling the jet initial disturbance of diverse location place can change diverse location place spraying primary crushing degree, thus optimize primary crushing drop or the distribution situation of brin group in firing chamber, improve fuel/air mixed process, improve the utilization ratio of air in the bags.
Summary of the invention
The object of this invention is to provide a kind of mechanical disturbance atomizing fuel spray nozzle obviously can optimizing atomization and spray droplet space distribution situation under identical jet pressure condition.
Technological scheme of the present invention is: a kind of mechanical disturbance atomizing fuel spray nozzle, comprises needle-valve and needle-valve body, also comprise protruding structure, and described protruding structure is positioned at the spray orifice outlet port side-lower of oil nozzle.
In such scheme, described protruding structure is spur type solid of rotation.
In such scheme, described protruding structure maximum height is 0.1 ~ 0.15 times of described injection diameter.
In such scheme, described protruding structure is 0.1 ~ 0.15 times of described injection hole on injection nozzle diameter along the extreme length that described spray orifice circumferentially distributes.
In such scheme, described oil nozzle is perforated plate type atomizer.
The invention has the beneficial effects as follows: improve jet pressure oil-fired system and relevant device are compared with cost to obtain good atomizing effect with existing dependence, structure of the present invention is simple, only needs on existing described jet orifice structure basis by the corresponding protruding structure of crystallisation manufacture; The size of described protruding structure is determined by corresponding described injection diameter, namely the height of described protruding structure is 0.1 ~ 0.15 times of described injection diameter, described protruding structure is 0.1 ~ 0.15 times of described injection diameter along spray orifice length circumferentially, and described protruding structure is spur type solid of rotation, reduce and amass with the contacting section of fluid, if described protruding structure is non-convex tip solid of rotation shape, such as spur top is not spur, but it is flat, the resistance that fuel oil flows out will be increased like this, there will be and hinder fuel oil ejection spray orifice; The preferred perforated plate type atomizer of described oil nozzle, in perforated plate type atomizer, application makes spray structure be tending towards symmetrical, and effect of optimization is better; Under equal jet pressure condition, the invention enables oil nozzle atomization to improve further, optimize the distribution situation of spray droplet in the bags, promote the mixed process of fuel/air, Optimizing Combustion, for the efficient low-discharging of diesel engine contributes.
Accompanying drawing explanation
Fig. 1 is oil nozzle structural representation of the present invention.
Fig. 2 is part A partial enlarged drawing in Fig. 1.
Fig. 3 is the partial enlarged drawing of protruding structure relative to injection diameter.
In figure, 1, needle-valve; 2, needle-valve body; 3, spray orifice; 4, protruding structure; 5, oil nozzle.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail, but protection scope of the present invention is not limited to this.
As shown in Figure 1, a kind of mechanical disturbance atomizing fuel spray nozzle, comprise needle-valve 1 and needle-valve body 2, described needle-valve 1 is identical with existing needle-valve, but described needle-valve body 2 is different from existing needle-valve body, the present invention adopts crystallisation, and in spray orifice 3 outlet port of oil nozzle 5, side-lower generates minute protrusions structure 4, as shown in Figure 2.
As shown in Figure 3, the size of described protruding structure 4 is determined by described spray orifice 3 diameter, and namely the height of described protruding structure 4 is 0.1 ~ 0.15 times of described spray orifice 3 diameter; Described protruding structure 4 is 0.1 ~ 0.15 times of described spray orifice 3 diameter along described spray orifice 3 length circumferentially.
Described protruding structure 4 is spur type solid of rotation.
Described oil nozzle 5 is perforated plate type atomizer.
The present invention is on original perforated plate type atomizer architecture basics, and in spray orifice outlet, side-lower processes minute protrusions structure by crystallisation, forms applied mechanical disturbance.Jet atomization mechanism shows, the initial fluctuation in spray stream surface is stronger, and spraying primary crushing is stronger, under identical jet pressure condition, protruding structure enhances spray surface initial disturbance, accelerates the first atomization of fuel oil, shorten spraying division length, optimize near field Spray breakup characteristic.In spray orifice outlet, side-lower manufactures described protruding structure and 4 can enough optimize certain limit internal spraying primary crushing near this side and described protruding structure 4, thus improvement is sprayed at the distribution character of the bags.
Described embodiment is preferred embodiment of the present invention; but the present invention is not limited to above-mentioned mode of execution; when not deviating from flesh and blood of the present invention, any apparent improvement that those skilled in the art can make, replacement or modification all belong to protection scope of the present invention.
Claims (5)
1. a mechanical disturbance atomizing fuel spray nozzle, comprise needle-valve (1) and needle-valve body (2), it is characterized in that, also comprise protruding structure (4), described protruding structure (4) is positioned at spray orifice (3) the outlet port side-lower of oil nozzle (5).
2. a kind of mechanical disturbance atomizing fuel spray nozzle according to claim 1, is characterized in that, described protruding structure (4) is spur type solid of rotation.
3. a kind of mechanical disturbance atomizing fuel spray nozzle according to claim 1, is characterized in that, described protruding structure (4) maximum height is 0.1 ~ 0.15 times of described spray orifice (3) diameter.
4. a kind of mechanical disturbance atomizing fuel spray nozzle according to claim 1, it is characterized in that, described protruding structure (4) is 0.1 ~ 0.15 times of described spray orifice (3) diameter along the extreme length that described spray orifice (3) circumferentially distributes.
5. a kind of mechanical disturbance atomizing fuel spray nozzle according to claim 1, is characterized in that, described oil nozzle (5) is perforated plate type atomizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510216608.2A CN104948368A (en) | 2015-04-30 | 2015-04-30 | Mechanical disturbance atomizing oil nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510216608.2A CN104948368A (en) | 2015-04-30 | 2015-04-30 | Mechanical disturbance atomizing oil nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104948368A true CN104948368A (en) | 2015-09-30 |
Family
ID=54163331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510216608.2A Pending CN104948368A (en) | 2015-04-30 | 2015-04-30 | Mechanical disturbance atomizing oil nozzle |
Country Status (1)
| Country | Link |
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| CN (1) | CN104948368A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060192A (en) * | 2021-10-28 | 2022-02-18 | 江苏大学 | Sectional type oil nozzle and optimal design method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0681750A (en) * | 1992-07-06 | 1994-03-22 | Robert Bosch Gmbh | Fuel injection nozzle used for diesel internal combustion engine and manufacture of said fuel injection nozzle |
| US20030141387A1 (en) * | 2002-01-31 | 2003-07-31 | Min Xu | Fuel injector nozzle assembly with induced turbulence |
| CN101333993A (en) * | 2008-07-15 | 2008-12-31 | 大连理工大学 | Internal-combustion engine alternating spray hole type nozzle with perturbing zone |
| US20120223164A1 (en) * | 2009-09-14 | 2012-09-06 | Junmei Shi | Nozzle assembly for an injection valve and injection valve |
-
2015
- 2015-04-30 CN CN201510216608.2A patent/CN104948368A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0681750A (en) * | 1992-07-06 | 1994-03-22 | Robert Bosch Gmbh | Fuel injection nozzle used for diesel internal combustion engine and manufacture of said fuel injection nozzle |
| US20030141387A1 (en) * | 2002-01-31 | 2003-07-31 | Min Xu | Fuel injector nozzle assembly with induced turbulence |
| CN101333993A (en) * | 2008-07-15 | 2008-12-31 | 大连理工大学 | Internal-combustion engine alternating spray hole type nozzle with perturbing zone |
| US20120223164A1 (en) * | 2009-09-14 | 2012-09-06 | Junmei Shi | Nozzle assembly for an injection valve and injection valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060192A (en) * | 2021-10-28 | 2022-02-18 | 江苏大学 | Sectional type oil nozzle and optimal design method thereof |
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Application publication date: 20150930 |
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| RJ01 | Rejection of invention patent application after publication |