CN109277217A - A kind of nozzle of the petal spray orifice of band - Google Patents
A kind of nozzle of the petal spray orifice of band Download PDFInfo
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- CN109277217A CN109277217A CN201811160838.1A CN201811160838A CN109277217A CN 109277217 A CN109277217 A CN 109277217A CN 201811160838 A CN201811160838 A CN 201811160838A CN 109277217 A CN109277217 A CN 109277217A
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- Prior art keywords
- spray orifice
- cross
- petal
- nozzle
- section
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
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Abstract
The present invention provides a kind of nozzle of petal spray orifice of band.The present invention includes nozzle body, at least one spray orifice is provided on the nozzle body, the cross section of the spray orifice any place is petal, longitudinal zoom factor is the continuous function that mould is greater than zero, obtains the cross section of the cross section of homalographic type, the cross section of area gradual shrinkage and area flaring type according to the change of zoom factor.Compared with prior art, the present invention the spray orifice internal turbulence disturbance of nozzle can be strengthened, increase jet stream initial surface area, promotes jet splitting and atomization to make nozzle obtain preferably mixed characteristic by spraying.Applied to the fuel nozzle of diesel engine with direct injection, spray particle average diameter can be made to reduce 7% under identical injection pressure, engine thermal efficiency improves 2.3%, and discharge quantity of particulate matter reduces by 14%.
Description
Technical field
The present invention relates to liquid injection technical fields, specifically, more particularly to a kind of petal spray orifice of band nozzle.
Background technique
In the application practice of the multiple fields such as industry, agricultural, health care, science and techniques of defence, liquid injection is all referred to
Technology sprays liquid using nozzle under a certain pressure, to realize respective purpose.Such as in field of internal combustion engine, fired using liquid
It when material, needs that a certain amount of liquid fuel is sprayed into air inlet pipeline or cylinder in a very short period of time by drive nozzle, be formed
It is spraying, so as to fuel and air quickly, be sufficiently mixed and burn, the carrier that fluid injector is sprayed as implementation, to liquid fuel
Spray characteristics have a major impact, and then influence internal combustion engine burning and emission performance.
Setting spray orifice is generally required in fluid injector, the geometry and size of spray orifice have important shadow to spray characteristic
It rings.It is currently used it is most be cross section be circular spray orifice, such as cylindricality spray orifice, taper spray orifice, taper spray orifice includes tapered cone
Shape and flaring taper spray orifice.
It is well known that the geometry of the spray orifice of fluid injector influences its interior flow field characteristic.Such as in field of internal combustion engine, liquid
The geometry of the spray orifice of fluid fuel nozzle influences its cavitation bubble formation characteristic, pressure and characteristics of Velocity Distribution, and then influences
The jet splitting and spray characteristics of liquid fuel.Improve liquid spray by the innovative design of the geometry of the spray orifice of fluid injector
Penetrating characteristic is a kind of important technological approaches.The invention is intended to further research and development improve the spray of liquid spray characteristic on the basis of this
Mouth.
Summary of the invention
According to technical problem set forth above, and provide a kind of nozzle of petal spray orifice of band.The present invention can generate suitable
Suitable internal turbulence disturbance, promotes jet splitting and atomization, to further improve liquid spray characteristic.Such as such nozzle application
In internal combustion engine, then suitable cavitation bubble distribution can be generated in nozzle interior, promotes fuel-oil atmozation, and then improve engine
Spraying mixed Daqu and combustibility.
The technological means that the present invention uses is as follows:
A kind of nozzle of the petal spray orifice of band, including nozzle body, are provided at least one spray on the nozzle body
Hole, the cross section of the spray orifice any place be it is petal, the petal cross-sectional profiles wire shaped meets following equation:
Wherein, parameter and variable-definition are as follows in above-mentioned equation:
ρ θ plane: polar coordinate plane where spray orifice cross section, origin are spray orifice cross section centroid, and wherein ρ and θ are respectively
The polar diameter and polar angle at any point in plane；
L: spray orifice length；
N: the petal number on spray orifice cross-sectional profiles line meets: n >=2；
A: the petal outer circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein doOutside for spray orifice entrance
Circular diameter；
B: the petal inner circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein diFor in spray orifice entrance
Circular diameter；
The longitudinally twisted angle of spray orifice cross-sectional profiles line meets,Wherein, z: spray orifice axis direction
Coordinate, spray orifice inlet z=0, spray orifice exit z=L；
K: longitudinal zoom factor of spray orifice cross-sectional profiles line meets, k=k (z)；
Further, in petal cross-sectional profiles line equation, the value range of a, b meet following condition
Further, from spray orifice entrance to outlet, cross-sectional profiles line follows function along spray orifice axisThe rule
Rule torsion, maximum twist angle Θ value range are as follows: 0 °≤Θ≤360 °.
Further, zoom factor k (z) is the continuous function that mould is greater than zero, indicates the value of zoom factor k with spray orifice axis
Line position z follows the rule variation of function k (z), whenThen spray orifice has the cross section of homalographic type；WhenThen spray orifice has the cross section of area gradual shrinkage；WhenThen spray orifice has the transversal of area flaring type
Face.
Further, the value range of zoom factor k meets:That is spray orifice maximum cross section
The ratio between long-pending and smallest cross-section area is not more than 2.
Further, the spray orifice is any kind or at least two sections of differences in homalographic type, gradual shrinkage and flaring type
Type combination forms, and the cross-sectional profiles line in two sections of junctions of arbitrary neighborhood is overlapped.
Further, the petal height h on spray orifice cross-sectional profiles line meets following relationship:
Further, the nozzle adopt be molded with a mold or 3D printing method processing, guarantee the machining accuracy and one of spray orifice
Cause property.
Compared with prior art, the present invention the spray orifice internal turbulence disturbance of nozzle can be strengthened, increase jet stream initial surface area,
Promote jet splitting and atomization to make nozzle obtain preferably mixed characteristic by spraying.Fuel oil applied to diesel engine with direct injection sprays
Mouth can make spray particle average diameter reduce 7% under identical injection pressure, and engine thermal efficiency improves 2.3%, particulate matter row
High-volume reduce by 14%.
The present invention can be widely popularized in liquid injection technical field based on the above reasons.
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 a kind of nozzle schematic diagram of the petal spray orifice of band of the present invention.
Fig. 2 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 1, and petal number is 2.
Fig. 3 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 2, and petal number is 3.
Fig. 4 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 3, and petal number is 4.
Fig. 5 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 4, and petal number is 5.
Fig. 6 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 5, and petal number is 6.
Fig. 7 is the contour line of the cross section of the petal spray orifice of the embodiment of the present invention 6, and petal number is 18.
Fig. 8 is the three-dimensional structure diagram of the petal spray orifice of the present invention, and the cross-sectional profiles line of the spray orifice is petal, petal
Number is 4, and longitudinal maximum twist angle, θ is 90 °.
Fig. 9 is the side view schematic diagram of spray orifice shown in Fig. 8.
Figure 10 is the zoom factor k of spray orifice described in Fig. 8 with the variation tendency of spray orifice axis.
In figure: 1, nozzle body；2, spray orifice.
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, appointing should be construed as merely illustratively to occurrence, 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 in Figure 1, such nozzle 1 is characterized in its spray orifice 2 the present invention provides a kind of nozzle of the petal spray orifice of band
Cross section have the petal contour line along the rotation of its axis, and the size of spray orifice cross-sectional profiles line can also be along spray orifice axis
Line gradual change according to certain rules, the present invention include nozzle body 1, at least one spray orifice 2 is provided on the nozzle body, described
The cross section of spray orifice 2 be it is petal, the petal cross-sectional profiles wire shaped meets following equation:
Wherein, parameter and variable-definition are as follows in above-mentioned equation:
ρ θ plane: polar coordinate plane where spray orifice cross section, origin are spray orifice cross section centroid, and wherein ρ and θ are respectively
The polar diameter and polar angle at any point in plane；
L: spray orifice length；
N: the petal number on spray orifice cross-sectional profiles line meets: n >=2；
A: the petal outer circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein doOutside for spray orifice entrance
Circular diameter；
B: the petal inner circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein diFor in spray orifice entrance
Circular diameter；
The longitudinally twisted angle of spray orifice cross-sectional profiles line meets,Wherein, z: spray orifice axis direction
Coordinate, spray orifice inlet z=0, spray orifice exit z=L；
K: longitudinal zoom factor of spray orifice cross-sectional profiles line meets, k=k (z)；
Embodiment 1
Spray orifice cross-sectional profiles line is as shown in Fig. 2, petal number n=2.The parameter value of cross-sectional profiles line equation are as follows: L=
1mm,K=1.
Embodiment 2
Spray orifice cross-sectional profiles line is as shown in figure 3, petal number n=3.The parameter value of cross-sectional profiles line equation are as follows: L=
1mm,K=1.
Embodiment 3
Spray orifice cross-sectional profiles line is as shown in Figure 4.Petal number n=4.The parameter value of cross-sectional profiles line equation are as follows: L=
1mm,K=1.
Embodiment 4
Spray orifice cross-sectional profiles line is as shown in Figure 5.Petal number n=5.The parameter value of cross-sectional profiles line equation are as follows: L=
1mm,K=1.
Embodiment 5
Spray orifice cross-sectional profiles line is as shown in Figure 6.Petal number n=6.The parameter value of cross-sectional profiles line equation are as follows: L=
1mm,K=1.
Embodiment 6
Spray orifice cross-sectional profiles line is as shown in Figure 7.Petal number n=18.The parameter value of cross-sectional profiles line equation are as follows: L
=1mm,K=1.
Embodiment 7
Spray orifice stereochemical structure is as shown in figure 8, spray orifice side view is as shown in Figure 9.Spray orifice cross-sectional profiles line petal number n=4.
The parameter value of cross-sectional profiles line equation are as follows: L=1mm, K=1.Spray orifice cross section wheel
Profile is reversed along its axis, and from spray orifice entrance to outlet, torsion angle is linearly increasing, and maximum twist angle θ is 90 °.
Embodiment 8
Spray orifice cross-sectional profiles line is as shown in Figure 4.Spray orifice cross-sectional profiles line petal number n=4.Cross-sectional profiles line equation
Parameter value are as follows: L=1mm,Spray orifice cross-sectional profiles line is reversed along its axis, from spray
For hole entrance to outlet, torsion angle is linearly increasing, and maximum twist angle θ is 90 °.As shown in Figure 10, the value of zoom factor k is along spray
Axially bored line consecutive variations, it then follows k=f (z)=m+n (z-pL)2, wherein 0 < p < 1, constitutes tapered-flaring type spray orifice, converging transition
It is at z=pL with the binding site of divergent segment, the position spray orifice cross-sectional area is minimum.In this example, m=0.9, n=are taken
0.1562, p=0.8, then zoom factor k is as shown in Figure 10 along the variation tendency of spray orifice axis.Nozzle the maximum cross-section area is entering
At mouthful, the ratio between spray orifice the maximum cross-section area and smallest cross-section area are 1.23, and the ratio between spray orifice discharge area and inlet area are
0.83。
Relative to round straight hole, the petal spray orifice of this example has the characteristics of promoting jet splitting and atomization, also has
The characteristics of rotating spray orifice enhancing internal turbulence disturbance.Further, since its structure for having tapered-flaring type, thus this example institute
It states spray orifice and had both had stronger pressure maintaining effect caused by gradual shrinkage jet orifice structure, increase the gross energy of spray orifice outlet fuel, again
Has the larger feature of flaring type spray orifice outlet cavitation bubble quantity.It is sprayed under pressure research shows that the structure sprays 150MPa
Hole exits gross energy improves 14% than round straight hole, and cavitation bubble number density increases by 32% than round straight hole, these bubbles
Crumbling and fall will further promote fuel jet to be atomized and mix.The study found that the present invention is applied to diesel engine with direct injection, it can be
Spray particle average diameter is set to reduce 7% under identical injection pressure, engine thermal efficiency improves 2.3%, granular material discharged reduction
14%.
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 (8)
1. a kind of nozzle of the petal spray orifice of band, including nozzle body, are provided at least one spray orifice on the nozzle body,
It is characterized in that, the cross section of the spray orifice any place be it is petal, the petal cross-sectional profiles wire shaped meets such as
Lower equation:
Wherein, parameter and variable-definition are as follows in above-mentioned equation:
ρ θ plane: polar coordinate plane where spray orifice cross section, origin are spray orifice cross section centroid, and wherein ρ and θ is respectively plane
The polar diameter and polar angle at interior any point；
L: spray orifice length；
N: the petal number on spray orifice cross-sectional profiles line meets: n >=2；
A: the petal outer circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein doIt is straight for spray orifice entrance outer circle
Diameter；
B: the petal inner circle path length ratio on spray orifice cross-sectional profiles line meets,Wherein diIt is straight for spray orifice entrance inner circle
Diameter；
The longitudinally twisted angle of spray orifice cross-sectional profiles line meets,Wherein, z: the seat of spray orifice axis direction
Mark, spray orifice inlet z=0, spray orifice exit z=L；
K: longitudinal zoom factor of spray orifice cross-sectional profiles line meets, k=k (z).
2. the nozzle of the petal spray orifice of band according to claim 1, which is characterized in that petal cross-sectional profiles line equation
In, the value range of a, b meet following condition:
3. the nozzle of the petal spray orifice of band according to claim 1, which is characterized in that transversal from spray orifice entrance to outlet
Facial contour line follows function along spray orifice axisThe rule torsion, maximum twist angle Θ value range are as follows: 0 °≤Θ
≤360°。
4. the nozzle of the petal spray orifice of band according to claim 1, which is characterized in that zoom factor k (z) is that mould is greater than zero
Continuous function, indicate zoom factor k value with spray orifice axial location z follow function k (z) it is described rule change, whenThen spray orifice has the cross section of homalographic type；WhenThen spray orifice has the cross section of area gradual shrinkage；
WhenThen spray orifice has the cross section of area flaring type.
5. the nozzle of the petal spray orifice of band according to claim 4, which is characterized in that the value range of zoom factor k is full
Foot:I.e. the ratio between spray orifice the maximum cross-section area and smallest cross-section area are not more than 2.
6. the nozzle of the petal spray orifice of band according to claim 4 or 5, which is characterized in that the spray orifice be homalographic type,
Any kind in gradual shrinkage and flaring type or at least two sections of different types are composed, the cross in two sections of junctions of arbitrary neighborhood
Cross section contour is overlapped.
7. the nozzle of the petal spray orifice of band according to claim 1, which is characterized in that the flower on spray orifice cross-sectional profiles line
Valve height h meets following relationship:
8. the nozzle of the petal spray orifice of band according to claim 1, which is characterized in that the nozzle adopt be molded with a mold or
The processing of 3D printing method, guarantees the machining accuracy and consistency of spray orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160838.1A CN109277217B (en) | 2018-09-30 | 2018-09-30 | Nozzle with petal-shaped spray holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811160838.1A CN109277217B (en) | 2018-09-30 | 2018-09-30 | Nozzle with petal-shaped spray holes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109277217A true CN109277217A (en) | 2019-01-29 |
| CN109277217B CN109277217B (en) | 2021-09-21 |
Family
ID=65182738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811160838.1A Active CN109277217B (en) | 2018-09-30 | 2018-09-30 | Nozzle with petal-shaped spray holes |
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| Country | Link |
|---|---|
| CN (1) | CN109277217B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915932A (en) * | 2021-01-21 | 2021-06-08 | 华东理工大学 | Lobe mixed-injection core pipe for bubble generation device and bubble generation method |
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| CN106150818A (en) * | 2016-08-24 | 2016-11-23 | 江苏大学 | A kind of internal combustion engine oval orifice fuel injector of band asymmetrical disturbance |
| CN106391341A (en) * | 2016-09-07 | 2017-02-15 | 中国神华能源股份有限公司 | Nozzle and steam ejector |
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|---|---|---|---|---|
| KR20040104049A (en) * | 2003-06-02 | 2004-12-10 | 주식회사 동화엔텍 | Petal nozzle for ejector |
| CN103362720A (en) * | 2012-03-29 | 2013-10-23 | 周军伟 | Lobed-duct tidal stream turbine and design method thereof |
| CN203508236U (en) * | 2013-07-09 | 2014-04-02 | 王浦勋 | Pre-rotation cavitation jet flow nozzle |
| CN104801435A (en) * | 2014-01-23 | 2015-07-29 | 刘友宏 | Chrysanthemum-shaped nozzle water injecting and air pumping device and an injection type mixer |
| CN106150818A (en) * | 2016-08-24 | 2016-11-23 | 江苏大学 | A kind of internal combustion engine oval orifice fuel injector of band asymmetrical disturbance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915932A (en) * | 2021-01-21 | 2021-06-08 | 华东理工大学 | Lobe mixed-injection core pipe for bubble generation device and bubble generation method |
| CN112915932B (en) * | 2021-01-21 | 2022-03-01 | 华东理工大学 | Lobe mixed-injection core pipe for bubble generation device and bubble generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109277217B (en) | 2021-09-21 |
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