CN103485953A - Method for determining spray cone angle of oil atomizer spray orifice - Google Patents
Method for determining spray cone angle of oil atomizer spray orifice Download PDFInfo
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Abstract
The invention discloses a method for determining the spray cone angle of an oil atomizer spray orifice. The method comprises the steps of (1) utilizing UG software to establish an oil atomizer model, a cylinder cover model and a piston model; (2) assembling the models according to the protruding height of an oil spraying nozzle and the compressing clearance of a piston of the oil atomizer; (3) calculating an oil beam penetrating distance L according to an oil beam character empirical formula; (4) determining the spraying center at the oil spraying starting time point and the spraying center at the oil spraying ending time point according to the stroke of the piston, and drawing the oil beam spraying simulation lines in the round ranges formed by taking the spraying center at the oil spraying starting time point and the spraying center at the oil spraying ending time point as circle centers and the oil beam penetrating distance L as a radius; (5) determining the simulated oil beam falling point by observing the crossing point of the oil beam spraying simulation lines determined in the step (4) and the boundary line of a combustion chamber model, wherein when the piston is positioned at the upper stopping point and the simulated oil beam falling point is positioned in the 40-50% depth range of the combustion chamber, the maximum included angle of the oil beam spraying simulating lines is the spray cone angle. The method is low in investment cost, strong in pertinence, accurate in testing and shortened in period.
Description
Technical field
The present invention relates to the engine fuel supply system, particularly a kind of method of definite oil sprayer spray orifice spray cone angle.
Background technique
At the engine fuel supply system, the spray characteristics of oil sprayer should meet the requirement of combustion system of diesel engine, so that mixed gas forms and burns perfectly, and obtains higher power and the thermal efficiency.Wherein, spray cone angle is an important parameter of diesel spray, and the change of spray cone angle affects the space distribution of fuel oil in cylinder, thereby affects the distribution of mixture strength, and combustion process and discharge are produced to important impact.
At present, the method of determining oil sprayer spray orifice spray cone angle generally has two kinds: a kind of is to utilize the hydsim software of avl to set up the oil sprayer model, by computation model, the working procedure of oil sprayer is carried out to simulation calculation, finally according to result of calculation, determine oil sprayer spray orifice spray cone angle; Another kind is the oil sprayer that several different spray orifice spray cone angles are provided by rule of thumb, then on diesel engine, tests one by one, finally according to test data, is selected.
Above-mentioned the first scheme utilizes the hydsim software of avl to carry out simulation calculation, and software overhead is high, investment is large.First scheme provides the oil sprayer of several different spray orifice spray cone angles to test one by one on diesel engine by rule of thumb, and blindness is large, increases experimentation cost, extends the cycle of product development.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, a kind of method of definite oil sprayer spray orifice spray cone angle is provided, set up model by using the UG design software, arrange that observing the oil bundle sprays the drop point situation, determine best oil sprayer spray orifice spray cone angle, invest little, with strong points, test accurately, is shortened the product testing construction cycle.
For achieving the above object, the invention provides a kind of method of definite oil sprayer spray orifice spray cone angle, comprise the steps: that (1) utilizes UG software to set up oil sprayer model, cylinder cap model and Piston Model; (2) the oil sprayer model is assemblied on the cylinder cap model according to oil sprayer oil nozzle protrusion height, and according to piston compression, clearance is assemblied in cylinder cap model bottom surface to Piston Model, and cylinder cap model and Piston Model surround combustion chamber model; (3) calculate spray penetration from L according to oil bundle characteristic empirical correlation; (4) spraying center and spraying center, oil spout end while determining beginning of injection according to piston stroke, when take respectively beginning of injection, spray center and spraying center, oil spout end are drawn the oil bundle as round dot, spray penetration and are sprayed unsharp line in radius from L; (5) intersection point by the injection unsharp line of the oil bundle in observation step (4) and combustion chamber model boundary line is defined as simulated oil bundle drop point, when piston is positioned at top dead center, and, when simulated oil bundle drop point is positioned at combustion-chamber depth 40%-50% scope, the maximum angle that the oil bundle sprays unsharp line is described spray cone angle θ.
Compared with prior art, the beneficial effect that the present invention has: use UG software and set up model, by setting up the analytical calculation schematic diagram, implement the method investment little, with strong points, test accurately, is shortened the product testing construction cycle.
The accompanying drawing explanation
Fig. 1 is that the present invention determines that the UG software of the method for oil sprayer spray orifice spray cone angle sets up Model Mounting schematic diagram (comprising oil sprayer model, cylinder cap model and Piston Model);
Fig. 2 is a kind of UG software model analytical calculation schematic diagram of the present invention's method of determining oil sprayer spray orifice spray cone angle.
Mark the following drawings mark thereon by reference to the accompanying drawings:
1-oil sprayer model, 2-cylinder cap model, 3-Piston Model, the 4-combustion chamber model, spraying center during the 5-piston top dead center, 6-combustion chamber model boundary line, 7-oil bundle sprays unsharp line, the L-spray penetration from, alpha-oil bundle angle, θ-spray cone angle, A-piston clearance, B-oil bundle drop point height, C-firing chamber height.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
The cardinal principle of the method for definite oil sprayer spray orifice spray cone angle of the present invention is, use UG software and set up oil sprayer model, cylinder cap model and Piston Model, wherein Piston Model and cylinder cap model surround combustion chamber model, observe the oil bundle by layout and spray the drop point situation, when oil bundle injection drop point all drops in combustion chamber model, oil bundle maximum angle is defined as best oil sprayer spray orifice spray cone angle.The UG software investment is little, with strong points, and test accurately, is shortened the product testing construction cycle.
As shown in Figure 1, utilize UG software to set up oil sprayer model 1, cylinder cap model 2 and Piston Model 3, after according to motor, concrete matching requirements assemble oil sprayer model 1, cylinder cap model 2 and Piston Model 3, Piston Model 3 forms combustion chamber model 4 with cylinder cap model 2.When the above-mentioned model of concrete assembling, according to the oil nozzle protrusion height, be the perpendicular distance of oil nozzle bulb to the cylinder cap bottom surface, generally get between 2-2.5mm, oil sprayer model 1 is assembled on cylinder cap model 2, according to piston compression clearance A, i.e. the gap of piston-top surface and cylinder cap bottom surface, be assembled to Piston Model 3 bottom surface of cylinder cap model 2.
As shown in Figure 2, after assembling model according to the method described above, the relativeness of orifice center and firing chamber while having determined piston top dead center, the relativeness of oil spout moment orifice center and firing chamber, and the relativeness of oil spout end piston, orifice center and firing chamber.When concrete computational analysis, utilize UG software to set up and analyze schematic diagram, wherein, spraying center during 5 expression piston top dead center, 6 mean the combustion chamber model boundary line, 7 mean that the oil bundle sprays unsharp lines, L mean spray penetration from, α means oil bundle angle, θ means spray cone angle, A means piston clearance, and B means oil bundle drop point height, and C means the firing chamber height.
When piston is positioned at top dead center, in the time of in the 40%-50% scope that oil bundle drop point height B is firing chamber height C, the maximum angle that the oil bundle sprays unsharp line 7 is best spray cone angle θ.Like this, use UG software and set up model, the spray cone angle of determining that by setting up the analytical calculation schematic diagram concrete firing chamber needs, provide important theoretical parameter to the design of concrete oil sprayer spray orifice.Implement the method investment little, with strong points, test accurately, is shortened the product testing construction cycle.
It should be noted that, setting up concrete analysis schematic diagram as shown in Figure 2 is very important to the present invention, because, in concrete motor, the size of oil sprayer spray cone angle is subject to the isostructural design in concrete firing chamber and changes.
Above disclosed be only specific embodiments of the invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (1)
1. the method for a definite oil sprayer spray orifice spray cone angle, is characterized in that, comprises the steps:
(1) utilize UG software to set up oil sprayer model, cylinder cap model and Piston Model;
(2) described oil sprayer model is assemblied on described cylinder cap model according to oil sprayer oil nozzle protrusion height, and according to piston compression, clearance is assemblied in described cylinder cap model bottom surface to described Piston Model, and described cylinder cap model and described Piston Model surround combustion chamber model;
(3) calculate spray penetration from L according to oil bundle characteristic empirical correlation;
(4) spraying center and spraying center, oil spout end while determining beginning of injection according to piston stroke, when take respectively described beginning of injection, spray center and spraying center, oil spout end are drawn the oil bundle as round dot, described spray penetration and are sprayed unsharp line in radius from L;
(5) intersection point that sprays unsharp line and described combustion chamber model boundary line by the described oil bundle of observing in step (4) is defined as simulated oil bundle drop point, when piston is positioned at top dead center, and, when simulated oil bundle drop point is positioned at combustion-chamber depth 40%-50% scope, the maximum angle that the oil bundle sprays unsharp line is described spray cone angle θ.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286063A (en) * | 2016-08-26 | 2017-01-04 | 天津成立航空技术有限公司 | A kind of determination method of pressure atomized fog jet performance indications |
| CN107620662A (en) * | 2017-09-11 | 2018-01-23 | 广州锦红源电子科技有限公司 | The scaling method and system of engine Spray Simulation |
| CN109359268A (en) * | 2018-09-05 | 2019-02-19 | 哈尔滨工程大学 | A kind of marine diesel heavy oil Spray penetration distance calculation method |
| CN114483403A (en) * | 2022-01-24 | 2022-05-13 | 宁波兴马油嘴油泵有限公司 | Oil nozzle detection method and system, storage medium and intelligent terminal |
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| JPH10148599A (en) * | 1996-11-20 | 1998-06-02 | Aisan Ind Co Ltd | Method for inspecting injection state of injector |
| US20010022170A1 (en) * | 2000-02-22 | 2001-09-20 | Yoshio Okamoto | Fuel injection method of internal combustion engine and fuel injection apparatus of internal combustion engine |
| KR20040016237A (en) * | 2002-08-16 | 2004-02-21 | 현대자동차주식회사 | A confirmation apparatus nozzle form of diesel engine injector |
| DE10335739A1 (en) * | 2003-08-05 | 2005-03-03 | Daimlerchrysler Ag | Method for determining the quality of an injection nozzle |
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Patent Citations (4)
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| JPH10148599A (en) * | 1996-11-20 | 1998-06-02 | Aisan Ind Co Ltd | Method for inspecting injection state of injector |
| US20010022170A1 (en) * | 2000-02-22 | 2001-09-20 | Yoshio Okamoto | Fuel injection method of internal combustion engine and fuel injection apparatus of internal combustion engine |
| KR20040016237A (en) * | 2002-08-16 | 2004-02-21 | 현대자동차주식회사 | A confirmation apparatus nozzle form of diesel engine injector |
| DE10335739A1 (en) * | 2003-08-05 | 2005-03-03 | Daimlerchrysler Ag | Method for determining the quality of an injection nozzle |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286063A (en) * | 2016-08-26 | 2017-01-04 | 天津成立航空技术有限公司 | A kind of determination method of pressure atomized fog jet performance indications |
| CN106286063B (en) * | 2016-08-26 | 2018-12-11 | 天津成立航空技术有限公司 | A kind of determination method of pressure atomized fog jet performance indicator |
| CN107620662A (en) * | 2017-09-11 | 2018-01-23 | 广州锦红源电子科技有限公司 | The scaling method and system of engine Spray Simulation |
| CN109359268A (en) * | 2018-09-05 | 2019-02-19 | 哈尔滨工程大学 | A kind of marine diesel heavy oil Spray penetration distance calculation method |
| CN109359268B (en) * | 2018-09-05 | 2021-07-16 | 哈尔滨工程大学 | Method for calculating penetration distance of heavy oil spray of marine diesel engine |
| CN114483403A (en) * | 2022-01-24 | 2022-05-13 | 宁波兴马油嘴油泵有限公司 | Oil nozzle detection method and system, storage medium and intelligent terminal |
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| CN103485953B (en) | 2015-09-09 |
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