CN208619425U - Bleed ring, injector and injection inflation system - Google Patents
Bleed ring, injector and injection inflation system Download PDFInfo
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- CN208619425U CN208619425U CN201820934465.8U CN201820934465U CN208619425U CN 208619425 U CN208619425 U CN 208619425U CN 201820934465 U CN201820934465 U CN 201820934465U CN 208619425 U CN208619425 U CN 208619425U
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Abstract
The utility model provides a kind of bleed ring, injector and injection inflation system, the bleed ring includes interior bleed ring and outer bleed ring, multiple driving nozzles are provided on the interior bleed ring, multiple driving nozzles are provided on the outer bleed ring, the interior bleed ring is connected with high-pressure bleed air pipe with the outer bleed ring and is both secured to high-pressure bleed air pipe, and the high pressure gas from high-pressure bleed air pipe is sprayed by driving nozzle.Injection inflation system with the bleed ring can carry out quick injection inflation when crisis occurs, so that charging volume helps passenger to escape as early as possible after reaching lifesaving pressure limit.
Description
Technical field
The utility model belongs to aviation, navigation, fire-fighting emergent escape field, the in particular to a kind of quick injection of passenger's escape
Inflation system injector.
Background technique
The quick injection inflation system of passenger's escape is steady by high-pressure air source (such as gas cylinder that high pressure gas is housed), high pressure relief
The composition such as pressure valve, high-pressure ejector and high-pressure bleed air pipeline, as shown in Figure 1.Ejector structure is as shown in Fig. 2, wherein nozzle
Two kinds of forms of divergent nozzle and Laval-cavity nozzle can preferably be used.The built-in high pressure N of high-pressure air source 102With CO2Mixed working fluid,
For high pressure relief pressure maintaining valve 20 by pressure needed for mixed working fluid pressure reduction to injection, mixed working fluid flows into injector 40, and sucking is big
Amount ambient air enters the charging volume quick injection inflation of progress (not shown) jointly, shortens inflationtime, helps passenger as early as possible
Escape.Mixed working fluid flow is draught jet capacity, and the ambient air flow of sucking is inhalation flow, inhalation flow and draught jet capacity it
Than for injection ratio.
Passenger escapes the pressure that quick injection inflation system needs that charging volume is made to reach requirement in the shortest possible time
Power, therefore it is required that the system draught jet capacity is big, for injection than high, simultaneity factor volume, weight cannot be too big.It is mixed in high-pressure air source
The parameters such as working medium component, filling quality, injection pressure, high-pressure ejector structure all have a significant impact to the performance of system requirements,
These parameters need to carry out rational design determination, in order to the extensive use of quick injection inflation system.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of bleed ring, and feature exists
In the bleed ring includes interior bleed ring and outer bleed ring, and multiple driving nozzles are provided on the interior bleed ring, described to draw outside
It is provided with multiple driving nozzles on compression ring, the interior bleed ring is connected with high-pressure bleed air pipe and solid with the outer bleed ring
Due to high-pressure bleed air pipe, the high pressure gas from high-pressure bleed air pipe is sprayed by driving nozzle.
In bleed ring as described above, preferably: the multiple driving nozzles being arranged on the interior bleed ring are divided equally described
The two sides of high-pressure bleed air pipe, the multiple driving nozzles being arranged on the outer bleed ring are divided equally in the two sides of the high-pressure bleed air pipe.
In bleed ring as described above, preferably: positioned at the more of high-pressure bleed air pipe the same side on the interior bleed ring
A driving nozzle is uniformly arranged within the scope of the center of circle angle of 180 ° of -2 α, and the high-pressure bleed air pipe is located on the outer bleed ring
Multiple driving nozzles of the same side are uniformly arranged within the scope of the center of circle angle of 180 ° of -2 β, and α and β are indicated close to high-pressure bleed air pipe
Driving nozzle relative to high-pressure bleed air pipe axis angle.
In bleed ring as described above, preferably: 30 ° of α <；β=10 °~15 °
In bleed ring as described above, preferably: α=26 °~27.5 °；β=10~15 °
In bleed ring as described above, preferably: 6 driving nozzles are provided on the interior bleed ring,
12 driving nozzles are provided on the outer bleed ring.
The utility model also provides a kind of injector, which is characterized in that the injector includes: above-mentioned any described
Bleed ring；Suck the suction chamber of ambient air；And mixing chamber, the bleed ring are set to the suction chamber, the high pressure gas
The mixing chamber is ejected by the multiple driving nozzle and is mixed in the mixing chamber with the ambient air.
In injector as described above, preferably: the mixing chamber diameter is D, and interior bleed ring centerline diameter is d, interior
Outer bleed ring centerline δ,
In injector as described above, preferably: the driving nozzle is Laval-cavity nozzle, the ruler of the Laval-cavity nozzle
It is very little be limited to it is at least one following: inlet diameter D1=2.5mm~3.5mm；Outlet diameter D2=2.5mm~3.5mm；Throat
Diameter D3=1.7mm~2.0mm.
In injector as described above, preferably: D1=D2.
In injector as described above, preferably: the diameter Dh of the mixing chamber is in 80-100mm；The mixing chamber
The relationship of total length L h and Dh are Lh=2.2Dh~3.0Dh.
The utility model also provides a kind of injection inflation system characterized by comprising any of the above-described injection
Device；And charging volume, the charging volume is imported into from the mixed gas of injector.
By experimental verification it is found that if induction apparatus using the above structure is for the life-saving injection inflation system that helps meet an urgent need
It unites, the injection ratio during injection can achieve 2.5 or more, realize the purpose of fast aeration, may make emergency life-saving gas
Capsule is rapidly filled with gas.
Other feature and advantage of the utility model will be in following specific embodiment part detailed description.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
Fig. 1 is that passenger escapes the structural schematic diagram of quick injection inflation system.
Fig. 2 is high-pressure ejector structure chart.
Fig. 3 shows N in mixed working fluid2Influence diagram of the content to inflation performance.
Fig. 4 is the 18 nozzle ejector nozzle layouts figure with bleed ring.
Fig. 5 is Laval-cavity nozzle structural schematic diagram.
The reference numerals are as follows in figure:
10 high-pressure air sources；20 high pressure relief pressure maintaining valves；30 high-pressure bleed air pipelines；35 high-pressure bleed air pipes；40 injectors；50
Injection inflow entrance；60 mixing chambers；70 suction chambers；80 driving nozzles；350 high-pressure bleed air duct occlusion ends；Bleed ring in 553；Outside 557
Bleed ring；Dh mixing chamber diameter；Lh mixing chamber total length.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
The embodiment of type is described in further detail.It should be understood that the specific embodiments described herein are only used for
Bright and explanation the utility model, is not intended to limit the utility model.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For electricity and the communications field, it can be wired connection, be also possible to wirelessly connect
It connects.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood with concrete condition
Meaning.
The preferred embodiment of the utility model provides a kind of quick injection inflation system injector of passenger's escape.
1, high-pressure air source N2With CO2The determination of mixed working fluid component
High-pressure air source finite volume, and being stored in high pressure gas cylinder with high voltage style, quick injection inflation system can only be
Surrounding air is sucked as much as possible using limited mixed working fluid in short time, is improved in injection stage inflow charging volume
Gaseous mass.Therefore parameter designing should improve draught jet capacity and injection ratio as far as possible.
Inventors have found that high-pressure air source working medium is by pure N2Gradually increase CO2During content, i.e., with mixed working fluid N2Quality
The reduction of score, system draught jet capacity gradually rise, and inhalation flow variation is unobvious, and injection ratio gradually decreases.It is seen by this respect,
N in mixed working fluid2Content height is advantageous to fast aeration, because injection is than high in this case, illustrates induction efficiency height, limited
Mixed working fluid quality can suck more surrounding airs.However, as N in high-pressure air source2When content is very high, same volume, pressure
The working medium quality stored in gas source under power is considerably less, during injection, consumes with gas source working medium, remaining power pressure in gas source
Reduction is very fast, greatly shortens injection inflationtime, and injection gas replenishment process is too short, to suck inflation during reducing injection
The blowing pressure is not achieved in surrounding air amount in volume, reduces passenger safety escape chance.Therefore, mixed working fluid is properly increased
Middle CO2Content can effectively increase the working medium quality in high-pressure air source, maintain bleed pressure during injection, extend injection mistake
Journey meets pressure needed for charging volume to suck enough surrounding airs, enables passenger's safe escape.Certainly with high pressure
CO in gas source mixed working fluid2The increase of content, gas source fill the increase of working medium quality quickly, increase quick injection inflation system weight
Add, it is unfavorable to system.
N in high-pressure air source working medium2Mass fraction, the relationship between injection ratio and mixed gas quality (charging volume) is as schemed
Shown in 3.
As can be seen from FIG. 3, mixed working fluid component needs rationally to determine, should ensure that system charging volume demand first, herein
In the case of improve the injection ratio of injector as far as possible, while reducing gas source mixed working fluid gross mass.As seen from Figure 3, work as gaseous mixture
Middle N2When mass fraction is lower than 0.4 or so, mixed gas quality increase is very fast, N2Content continues to reduce, and induction efficiency obviously compares
It is low, to making full use of the working medium in gas source unfavorable.
Therefore, the utility model selects CO2With N2Gaseous mixture as inflation high-pressure air source mixed working fluid, and according to
The research of inventor is by CO2With N2N in mixed working fluid2Mass component range be determined as 0.4~0.7 (that is, N2Quality point
Number is 40%-70%), such as can be 0.45,0.48,0.50,0.53,0.55,0.57,0.60,0.62,0.65,0.68
Deng.
In addition, CO in high pressure gas cylinder2With N2Gaseous mixture exist with the pressure limit of 2MPa~5MPa, such as can be
2.2MPa、2.4MPa、2.6MPa、3MPa、3.3MPa、3.6MPa、3.9MPa、 4.0MPa、4.1MPa、4.4MPa、4.6MPa、
4.8MPa waiting.
As the high pressure gas cylinder for storing above-mentioned mixed working fluid, can using it is any can bear above-mentioned pressure and will not with mix
Any gas reacts in working medium material is made.
2, injection pressure
For quick injection inflation system, injection pressure is very high, and the ratio between injection pressure and system back pressure are much larger than 10, spray
Mouth outlet is supersonic airstream.In this case, the increase draught jet capacity that the raising of injection pressure can be proportional, but injection ratio
It will reduce, induction efficiency is low to making full use of gas source working medium unfavorable.On the other hand, injection hypotony can be low due to draught jet capacity
Too low mixed traffic is caused, inflation is not achieved and requires.Therefore the setting of injection pressure is extremely important, and the pressure is rationally arranged can also
So that system reaches fast and efficiently inflation and requires.To guarantee system induction efficiency, for Laval-cavity nozzle injector, preferably
The stagnation pressure absolute pressure of flow type pump with injection inlet is not more than 3.4MPa；For divergent nozzle injector, preferably injection inflow entrance stagnation pressure
Absolute pressure is not more than 3.8MPa.
That is, the gas pressure that the high pressure relief pressure maintaining valve in Fig. 1 comes out, can select not according to the type of nozzle
Same pressure.
3, ejector structure
As shown in Figure 1, 2, the injection inflation system injector researched and developed as the inventor of the utility model, the injector
It include: suction chamber 70, mixing chamber 60, and the injection portion being set in the suction chamber 70, which includes: and high-pressure air source
The high-pressure bleed air pipe 35 of connection；It is connected to high-pressure bleed air pipe 35 and is set to the indoor bleed ring of sucking, and be mounted on bleed
Multiple driving nozzles 80 on ring；
Gas from high-pressure air source 10 (can be above-mentioned mixed working fluid, be also possible to other and can satisfy inflation to want
Any gas asked, such as existing life-saving inflatable system gas), defined pressure is being reduced to by high pressure relief pressure maintaining valve
After power, the flow type pump with injection inlet of high-pressure bleed air pipe 35 is come by one or more high-pressure bleed air pipeline 30, is again passed through
Bleed component and driving nozzle 80 are injected into mixing chamber 60, when high pressure gas enters injector, have a large amount of ambient air
Be inhaled into and formed suck stream from the atmosphere open end of suction chamber 70, so enter in mixing chamber 60 with the height from injection component
Gas mixing is pressed, is formed after mixed flow and enters charging volume (such as life saving air bag) jointly again, carry out quick injection inflation, so that
Charging volume helps passenger to escape as early as possible after reaching lifesaving pressure limit.
Wherein, high-pressure bleed air pipe 35 can be fixed on suction chamber 70, and bleed ring is securable on high-pressure bleed air pipe 35, they
It can also directly be placed in suction chamber 70 as needed.
As the bleed ring being connected to high-pressure bleed air pipe 35, it is arranged on bleed ring and multiple is used to that driving nozzle 80 is installed
Opening.And as bleed ring, it can be the bleed ring that only setting one is disposed with multiple driving nozzles 80 thereon, it can also be with
Multiple bleed rings including being respectively arranged with multiple driving nozzles 80, such as interior bleed ring 553 and outer bleed ring 557, wherein in
Bleed ring 553 is connected with high-pressure bleed air pipe 35 with outer bleed ring 557.
As the mode that interior bleed ring 553 is connected to high-pressure bleed air pipe 35, high-pressure bleed air pipe 35 and interior bleed ring can be
553 are connected at one, are also possible to be connected at two, when being connected at two, preferably along in the diametrical direction of interior bleed ring with it is interior
The connection of bleed ring.
Equally, the mode being connected to as outer bleed ring 557 with high-pressure bleed air pipe 35, can be high-pressure bleed air pipe and outer bleed
Ring is connected at one, is also possible to be connected at two, when being connected at two, preferably along in the diametrical direction of outer bleed ring with draw outside
Compression ring connection.
In addition, the closed end 350 of high-pressure bleed air pipe can be and be set to suction chamber wall portion, it is also possible to be set to bleed ring
Wall portion (can be outer bleed rampart portion when having inside and outside bleed ring), can also be set to bleed rampart portion and suction chamber wall portion it
Between.
As shown in Fig. 2, suction chamber 70 is by including two sections: the first segment and columnar second segment of taper type, wherein first
The large diameter end (open end towards atmosphere) of section is the ambient air open end of suction chamber, is the inflow end of suction airflow, the
One section of small-caliber end is the one end connecting with second segment.
As distribution mode of the driving nozzle 80 on bleed ring, it can be multiple driving nozzles 80 on entire injection ring
It is uniformly distributed, is also possible to respectively in the certain angular range in the two sides of a certain diameter line of bleed ring, at certain angle
It spends in range, can be and be uniformly distributed, be also possible to other distributions based on needs, high-pressure bleed air pipe is set along the diameter line
35。
The nozzle quantity and layout of injector
Injector nozzle quantity is related with injector mixing chamber size, and mixing chamber size is inflated with quick injection inflation system
Volume variation requires draught jet capacity and mixed traffic high when charging volume is big, injector mixing chamber is accordingly also bigger.For
Same injector mixing chamber, nozzle quantity and layout influence highly significant to induction efficiency.To guarantee that systematic comparison is high
Induction efficiency, nozzle quantity can not it is very few can not be excessive, for certain nozzle quantity, nozzle should select suitable cloth set
It sets, position changes with nozzle quantity.
It is 80~100mm range for mixing chamber diameter, the quantity of preferably driving nozzle is set as 18, driving nozzle phase
The placement position of mixing chamber space is analyzed as follows.
As shown in figure 4, inside and outside two bleed rings are arranged in injector induction chamber, wherein 18 driving nozzles are mounted on bleed
On ring, that is to say, that be provided with 18 openings for being used to install driving nozzle on bleed ring, high pressure mixing working medium (can be
Any high pressure gas for being able to satisfy inflatable lifesaving, preferably CO2With N2Gaseous mixture) flow type pump with injection by high-pressure bleed air pipe 35 guide and
Inside and outside bleed ring is reached, enter 18 driving nozzles through bleed ring and then is injected into mixing chamber, is launched into high pressure mixing working medium
While mixing chamber, the low-pressure air in environment is axially drawn into suction chamber by injection along mixing chamber, and then enters mixing chamber.
, can be as shown in Figure 4 as the arrangement of 18 driving nozzles, 12 ejections are arranged on outer bleed ring
Mouth is disposed with 6 nozzles on interior bleed ring, as the relationship of bleed ring and driving nozzle, can be and is provided on bleed ring
For installing the opening of driving nozzle, it is also possible to driving nozzle and is integrally formed with bleed annular, it specifically can be according to practical need
To select, it is generally preferable to the former.
12 driving nozzles (could also say that the opening for installing nozzle) being arranged on outer bleed ring are arranged symmetrically in
The pipe axis two sides of high-pressure bleed air pipe, the angle β table of pipe axis of the nozzle of close air entraining pipe relative to high-pressure bleed air pipe 35
Show, 6 nozzles of every side are evenly distributed in 180 ° of -2 β angular range.6 nozzles arranged on interior bleed ring are (alternatively
It is the opening for installing nozzle), and the pipe axis two sides of high-pressure bleed air pipe 35 are arranged symmetrically in, close to the nozzle of air entraining pipe
Angle relative to pipe axis indicates that 3 nozzles of every side are evenly distributed in 180 ° of -2 α angular range with α.Assuming that mixing chamber
Diameter is D, and interior bleed ring centerline diameter is d, inside and outside bleed ring centerline δ.Then arrangement of nozzles position is preferred in Fig. 4
Meet following relationship:
30 ° of α <, such as 10 °, 12 °, 15 °, 18 °, 20 °, 22 °, 25 °, 26.5 °, 27 °, 28 °, 28.5 °, 29 °, 29.5 °
Deng preferably 26 °~27.5 °；β=10~15 °, such as 11 °, 11.5 °, 12 °, 12.5 °, 13 °, 13.5 °, 14 °, 14.5 ° etc..
According to experimental verification it is found that if using this spline structure injector, the injection ratio during injection can achieve
2.5 or more, reach the requirement of fast aeration.
4 Laval-cavity nozzle sizes
As above-mentioned driving nozzle, Laval-cavity nozzle can be used, divergent nozzle can also be used.Below with daraf(reciprocal of farad) that
Requirement of the explanation to nozzle arrangements for nozzle.The structure of Laval-cavity nozzle is as shown in figure 5, entrance, throat and outlet diameter point
Not Wei D1, D2, D3, outlet diameter D3 cannot be less than throat diameter D2.Nozzle entrance, outlet diameter variation can significantly affect and draw
Amount of jet, induction efficiency.The gas source high-pressure working medium that big draught jet capacity and high induction efficiency can make full use of improves charging volume, contracting
Short inflationtime realizes fast aeration.
Nozzle entrance diameter adjustable draught jet capacity in a certain range, but induction efficiency is influenced it is unobvious, with entering
Mouth diameter increases draught jet capacity and improves, and draught jet capacity no longer becomes larger after increasing to certain value, and inlet diameter reaches best at this time
State can make injector obtain higher draught jet capacity under certain injection pressure.
Nozzle outlet diameter changes induction efficiency in a certain range, unobvious on draught jet capacity influence, as outlet is straight
Diameter increases induction efficiency and significantly improves, and induction efficiency no longer improves after increasing to certain value, reaches maximum value, and outlet is straight at this time
Diameter reaches optimum state.Therefore there are maximum values for outlet diameter, and injector is in efficient operation state in this case.
The entrance and outlet diameter optimum value of nozzle need to be [a kind of using CFD analysis software according to injector overall structure
Business software] it determines.The determination method of maximum nozzle inlet diameter are as follows: by nozzle entrance diameter D1 parameter in simulation software
Change, modification remaining size of dimensional values immobilizes and simulation analysis, determines best inlet diameter according to maximum draught jet capacity；Together
Sample parameterizes nozzle outlet diameter D3 in simulation software, and modification remaining size of dimensional values immobilizes and simulation analysis,
According to maximum injection than determining best outlet diameter.
For 18 nozzle ejectors said before, when mixing chamber diameter is within the scope of 80~100mm, Laval-cavity nozzle enters
The range of mouth diameter D1 is 2.5~3.5mm, and the range of throat diameter D2 is 1.7~2.0mm, and outlet diameter D3 range is 2.5
~3.5mm.D1, D2 and D3 meet following relationship:
D1=D3
When mixing chamber diameter is 100mm or so, D1=D3 ≈ 2D2, nozzle entrance, outlet diameter optimum value are 3.5mm.
5, the draw ratio of mixing chamber
In addition, the dimensional structure of mixing chamber can also have a certain impact to induction efficiency and inspiratory flow tool.Among these
One important parameter is exactly injector mixing chamber draw ratio.
As shown in Fig. 2, mixing chamber 2 includes the first segment of cross-section size and the second segment of variable cross-section size, wherein first
Section is that one end is connect with suction chamber, receives high-pressure working medium gas or N2 from driving nozzle and sucks from suction chamber 70
Ambient air gas, the small-caliber end of the other end and second segment connects, and second segment is as far from small-caliber end, diameter becomes
Greatly, the air-flow being mixed to get is imported into lifesaving charging volume such as air bag.The total length of first segment and second segment is Lh, injection
Device mixing chamber draw ratio is the ratio between the total length L h and the diameter Dh of cross-section section of mixing chamber of mixing chamber.
Mixing chamber draw ratio is variation to the effect tendency of injection performance.When draw ratio very little, same high-pressure working medium
Inspiratory flow is low, and induction efficiency is low；Increase with draw ratio, induction efficiency gradually rises, but when draw ratio is more than 3, injection ratio is mentioned
High no longer significant, injection ratio can be reduced instead by being further continued for increase draw ratio.Injector draw ratio can not be too small, also can not be excessive,
Otherwise other than it may reduce induction efficiency, also make injector volume and weight too big.
Through comprehensively considering, the draw ratio range of mixing chamber takes 2.2~3.0 in the utility model, for example, can for 2.35,
2.45、2.45、2.60、2.75、2.90。
6, the area ratio of mixing chamber
In addition, the inventor of the present application discovered that the area of injector mixing chamber also can be to induction efficiency and inspiratory flow measurer
It has a certain impact.An important parameter is exactly the area ratio of injector mixing chamber among these
The area ratio of injector mixing chamber is the ratio between mixing chamber cross-section section circulation area and nozzle minimum circulation gross area.
Minimum circulates the gross area i.e.: sectional area × nozzle number that nozzle most fine positioning is set.
In reasonable nozzle layout, the area ratio for rationally designing mixing chamber can effectively improve quick injection inflation system
The induction efficiency of system.When area ratio very little, same high-pressure working medium inspiratory flow is low, and induction efficiency is low；Increase with area ratio, draws
Efficiency is penetrated to gradually rise；But when area ratio increases to a certain range, injection is more little than changing, and is further continued for increasing to reduce instead drawing
Penetrate ratio.Therefore, when injection is than changing little, area ratio should be reduced as far as possible to reduce injector volume and weight.
Through comprehensively considering, the area ratio range of mixing chamber takes 130~190 in the utility model, can guarantee not in this way
In the case of reducing induction efficiency, reduce the volume and weight of injector.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature
Scheme is applied to realize.Therefore, embodiment disclosed above, in all respects are merely illustrative, and are not only
's.All changes that come within the scope of the invention or equivalents of the invention are by the utility model packet
Contain.
Claims (12)
1. a kind of bleed ring, which is characterized in that
The bleed ring includes interior bleed ring and outer bleed ring,
Multiple driving nozzles are provided on the interior bleed ring,
Multiple driving nozzles are provided on the outer bleed ring,
The interior bleed ring is connected with high-pressure bleed air pipe with the outer bleed ring and is both secured to high-pressure bleed air pipe, from
The high pressure gas of high-pressure bleed air pipe is sprayed by driving nozzle.
2. bleed ring according to claim 1, which is characterized in that
The multiple driving nozzles being arranged on the interior bleed ring are divided equally in the two sides of the high-pressure bleed air pipe,
The multiple driving nozzles being arranged on the outer bleed ring are divided equally in the two sides of the high-pressure bleed air pipe.
3. bleed ring according to claim 2, which is characterized in that
Multiple driving nozzles on the interior bleed ring positioned at high-pressure bleed air pipe the same side are uniformly arranged the circle in 180 ° of -2 α
In heart angular range,
Multiple driving nozzles on the outer bleed ring positioned at high-pressure bleed air pipe the same side are uniformly arranged the circle in 180 ° of -2 β
In heart angular range,
α and β indicates the angle of axis of the driving nozzle of close high-pressure bleed air pipe relative to high-pressure bleed air pipe.
4. bleed ring according to claim 3, which is characterized in that
30 ° of α <；β=10 °~15 °.
5. bleed ring according to claim 3, which is characterized in that
α=26 °~27.5 °；β=10~15 °.
6. bleed ring according to claim 1, which is characterized in that
6 driving nozzles are provided on the interior bleed ring,
12 driving nozzles are provided on the outer bleed ring.
7. a kind of injector, which is characterized in that the injector includes:
Any bleed ring of claim 1-6；
Suck the suction chamber of ambient air；With
Mixing chamber,
The bleed ring is set to the suction chamber,
The high pressure gas is ejected into the mixing chamber and with the ambient air described mixed by the multiple driving nozzle
Interior is closed to be mixed.
8. injector according to claim 7, which is characterized in that
The mixing chamber diameter be D, interior bleed ring centerline diameter be d, inside and outside bleed ring centerline δ,
9. injector according to claim 7, which is characterized in that
The driving nozzle is Laval-cavity nozzle,
The size of the Laval-cavity nozzle is limited at least one following:
Inlet diameter D1=2.5mm~3.5mm；
Outlet diameter D2=2.5mm~3.5mm；
Throat diameter D3=1.7mm~2.0mm.
10. injector according to claim 8, which is characterized in that
D1=D2.
11. injector according to claim 7, which is characterized in that
The diameter Dh of the mixing chamber is in 80-100mm；
The relationship of the total length L h and Dh of the mixing chamber are Lh=2.2Dh~3.0Dh.
12. a kind of injection inflation system characterized by comprising
Any injector of claim 7~11；With
Charging volume,
The charging volume is imported into from the mixed gas of injector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820934465.8U CN208619425U (en) | 2018-06-15 | 2018-06-15 | Bleed ring, injector and injection inflation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820934465.8U CN208619425U (en) | 2018-06-15 | 2018-06-15 | Bleed ring, injector and injection inflation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208619425U true CN208619425U (en) | 2019-03-19 |
Family
ID=65701666
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820934465.8U Expired - Fee Related CN208619425U (en) | 2018-06-15 | 2018-06-15 | Bleed ring, injector and injection inflation system |
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| Country | Link |
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| CN (1) | CN208619425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958540A (en) * | 2021-10-20 | 2022-01-21 | 贵州永红航空机械有限责任公司 | Supersonic air injection device |
-
2018
- 2018-06-15 CN CN201820934465.8U patent/CN208619425U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958540A (en) * | 2021-10-20 | 2022-01-21 | 贵州永红航空机械有限责任公司 | Supersonic air injection device |
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