CN207195041U - A kind of injector - Google Patents
A kind of injector Download PDFInfo
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- CN207195041U CN207195041U CN201721150090.8U CN201721150090U CN207195041U CN 207195041 U CN207195041 U CN 207195041U CN 201721150090 U CN201721150090 U CN 201721150090U CN 207195041 U CN207195041 U CN 207195041U
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- injection
- inner tube
- injector
- outer tube
- tube
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Abstract
The utility model discloses a kind of injector.The injector includes：Injection inner tube, the injection inner tube is hollow, and described injection inner tube one end is connected with airscrew engine, separately has and alternating expression injection amplitude device is provided with one end；Injection outer tube, the injection outer tube are set in outside injection inner tube, have gap between injection outer tube and the injection inner tube；The outer wall of the injection outer tube is connected with enging cabin；Wherein, the injection inner tube is used to discharge the high-temperature fuel gas of airscrew engine；Gap between the injection outer tube and the injection inner tube is used to discharge the cooling air-flow in enging cabin；The alternating expression injection amplitude device is used to increase high-temperature fuel gas and the wetted perimeter area of the cooling air-flow.The injector of the application has alternating expression injection amplitude device, and its size is small, suitable for the gap that inner and outer pipe is narrow and small.Staggeredly sawtooth effectively increases primary and secondary stream contact area, strengthens the sticky shearing effect between primary-to-secondary flow, so as to increase draught jet capacity.
Description
Technical field
Induction apparatus technical field is the utility model is related to, more particularly to a kind of injector.
Background technology
For the ventilating and cooling effect in reinforcing stimulus cabin, cooled down in generally use engine exhaust stream (main flow) injection cabin
The mode of air (secondary stream) increases the cooling air volume in cabin.Typically can be by increasing inner and outer pipe gap；Reduce inner and outer pipe
Overlapping area；Increase the modes such as primary and secondary stream contact area to increase draught jet capacity.But for the airplane design of reality,
Following problem be present in the design of engine bay ventilation cooling injector：(1) limited by space in enging cabin, outer tube diameter
Increasing degree is extremely limited, and inner tube area is determined by engine performance, therefore inner and outer pipe gap is relatively narrow and small, has a strong impact on
Injection effect；(2) inner and outer pipe gap limitation also causes the injection modes that injection effect is preferable but area is larger such as lobe injector
It can not use；(3) it is curved using deflecting down for heating of the alleviation engine high-temperature exhaust air stream to wing lower surface, outer tube
Pipe, outer tube corner air-flow easily block, and influence time stream flow；(4) outer tube, which is bent downwardly, causes engine high-temperature exhaust air stream straight
Injection is connect to outer tube upper wall surface so that outer tube temperature is too high；(5) constrained by inner tube weight and moment of flexure, inner tube has most
Long length is limited, therefore inner tube can not be realized to outer tube and blocked entirely；(6) inner and outer pipe overlapping area can be reduced by shortening inner tube length,
Improve injection effect, but inner tube length is too short, there may be engine exhaust and flow back to the hidden danger flowing in cabin.Therefore, need to set
Count that a kind of bulk is small, can effectively increase the mode of draught jet capacity, to improve the temperature of enging cabin and outer tube.
Thus, it is desirable to have a kind of technical scheme is come at least one drawbacks described above for overcoming or at least mitigating prior art.
Utility model content
The purpose of this utility model is to provide a kind of injector to overcome or at least mitigate at least one of prior art
Drawbacks described above.
To achieve the above object, the utility model provides a kind of injector, and the injector includes：
Injection inner tube, the injection inner tube is hollow, and described injection inner tube one end is connected with airscrew engine, separately there is one end
On be provided with alternating expression injection amplitude device；
Injection outer tube, the injection outer tube are set in outside the injection inner tube, in the injection outer tube and the injection
There is gap between pipe；The outer wall of the injection outer tube is connected with enging cabin；Wherein,
The injection inner tube is used to discharge the high-temperature fuel gas of airscrew engine；
Gap between the injection outer tube and the injection inner tube is used to discharge the cooling air-flow in enging cabin；
The alternating expression injection amplitude device is used to increase high-temperature fuel gas and the wetted perimeter area of the cooling air-flow.
Preferably, the alternating expression injection amplitude device is：Along the multiple saws of the end face of the injection inner tube circumferentially
Tooth, each sawtooth is in the axis direction deflection perpendicular to injection inner tube, and the yawing moment of the adjacent sawtooth of each two
Conversely.
Preferably, the deflection angle of each sawtooth is less than 45 degree.
Preferably, the injection outer tube include oared segrne pii, be connected with oared segrne pii etc. straight section and with etc. straight section company
The bend loss connect, the oared segrne pii are positioned close to one end being connected with airscrew engine of the injection inner tube；
Preferably, the size of the axial direction along the injection inner tube of the injection inner tube adds less than the oared segrne pii
It is described wait straight section the direction size and more than the oared segrne pii the direction size.
Preferably, the gap between the injection outer tube and the injection inner tube is 300 millimeters to 500 millimeters.
Preferably, the sawtooth is made of stainless steel material.
Preferably, the sawtooth bottom carries out rounding.
The injector of the application has alternating expression injection amplitude device, and its size is small, suitable for inner and outer pipe it is narrow and small between
Gap.Staggeredly sawtooth can effectively increase the contact area of primary and secondary stream, strengthen the sticky shearing effect between main flow and secondary stream, so as to
Increase draught jet capacity.Inner tube outlet section is turned round in outer tube before point, and inner tube retains certain overlay segment with outer tube, with
Avoid engine exhaust from flowing back to flow in enging cabin.The draught jet capacity of increase can realize that cold air wraps up to outer sleeve inner wall face,
Significantly slow down heating of the engine exhaust stream to outer tube.
Brief description of the drawings
Fig. 1 is the structural representation of the injector of the embodiment of the application one.
Fig. 2 is another structural representation of the injector shown in Fig. 1.
Reference：
| 1 | Injection inner tube | 3 | Sawtooth |
| 2 | Injection outer tube |
Embodiment
To make the purpose, technical scheme and advantage that the utility model is implemented clearer, below in conjunction with the utility model
Accompanying drawing in embodiment, the technical scheme in the embodiment of the utility model is further described in more detail.In the accompanying drawings, from beginning
Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Described reality
It is the utility model part of the embodiment to apply example, rather than whole embodiments.Below with reference to the embodiment of accompanying drawing description
It is exemplary, it is intended to for explaining the utility model, and it is not intended that to limitation of the present utility model.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belong to the scope of the utility model protection.Embodiment of the present utility model is described in detail below in conjunction with the accompanying drawings.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, it is for only for ease of description the utility model and simplifies description, rather than indicates or imply and be signified
Device or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this practicality
The limitation of novel protected scope.
Fig. 1 is the structural representation of the injector of the embodiment of the application one.Fig. 2 is another knot of the injector shown in Fig. 1
Structure schematic diagram.
Injector as shown in Figures 1 and 2 includes injection inner tube 1, injection outer tube 2, and injection inner tube 1 is hollow, injection inner tube 1
One end is connected with airscrew engine, separately has and alternating expression injection amplitude device is provided with one end；Injection outer tube 2 is set in injection
Outside inner tube 1, there is gap between injection outer tube 2 and injection inner tube 1；The outer wall of injection outer tube 2 is connected with enging cabin；Its
In, injection inner tube is used to discharge the high-temperature fuel gas of airscrew engine；Gap between injection outer tube and the injection inner tube
For the cooling air-flow in enging cabin to be discharged；Alternating expression injection amplitude device is used to increase high-temperature fuel gas and the cooling gas
The wetted perimeter area of stream.
The injector of the application has alternating expression injection amplitude device, and its size is small, suitable for inner and outer pipe it is narrow and small between
Gap.Staggeredly sawtooth can effectively increase the contact area of primary and secondary stream, strengthen the sticky shearing effect between main flow and secondary stream, so as to
Increase draught jet capacity.Inner tube outlet section is turned round in outer tube before point, and inner tube retains certain overlay segment with outer tube, with
Avoid engine exhaust from flowing back to flow in enging cabin.The draught jet capacity of increase can realize that cold air wraps up to outer sleeve inner wall face,
Significantly slow down heating of the engine exhaust stream to outer tube.
Referring to Fig. 1, in the present embodiment, alternating expression injection amplitude device is：Along the end face of injection inner tube circumferentially
Multiple sawtooth 3, each sawtooth 3 is in the axis direction deflection perpendicular to injection inner tube, and the deflection of the adjacent sawtooth of each two
In the opposite direction.
Referring to Fig. 1, in the present embodiment, the deflection angle of each sawtooth is less than 45 degree.
Referring to Fig. 1, in the present embodiment, injection outer tube includes oared segrne pii, be connected with oared segrne pii etc. straight section and
With the bend loss for waiting straight section to be connected, oared segrne pii is positioned close to one end being connected with airscrew engine of injection inner tube.
Referring to Fig. 1, in the present embodiment, the size of the axial direction along the injection inner tube of the injection inner tube is less than
The oared segrne pii add it is described wait straight section the direction size and more than the oared segrne pii the direction size.
Referring to Fig. 1, in the present embodiment, the gap between the injection outer tube and the injection inner tube for 300 millimeters extremely
500 millimeters.
Referring to Fig. 1, in the present embodiment, the sawtooth is made of stainless steel material.
Referring to Fig. 1, in the present embodiment, the sawtooth bottom carries out rounding.
It is last it is to be noted that：Above example is only to illustrate the technical solution of the utility model, rather than it is limited
System.Although the utility model is described in detail with reference to the foregoing embodiments, one of ordinary skill in the art should manage
Solution：It can still be modified to the technical scheme described in foregoing embodiments, or which part technical characteristic is entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model
The spirit and scope of technical scheme.
Claims (8)
1. a kind of injector, it is characterised in that the injector includes：
Injection inner tube (1), the injection inner tube (1) is hollow, and described injection inner tube (1) one end is connected with airscrew engine, separately
Have and alternating expression injection amplitude device is provided with one end；
Injection outer tube (2), the injection outer tube (2) are set in injection inner tube (1) outside, the injection outer tube (2) and institute
Stating between injection inner tube (1) has gap；The outer wall of the injection outer tube (2) is connected with enging cabin；Wherein,
The injection inner tube is used to discharge the high-temperature fuel gas of airscrew engine；
Gap between the injection outer tube and the injection inner tube is used to discharge the cooling air-flow in enging cabin；
The alternating expression injection amplitude device is used to increase high-temperature fuel gas and the wetted perimeter area of the cooling air-flow.
2. injector as claimed in claim 1, it is characterised in that the alternating expression injection amplitude device is：Along the injection
The multiple sawtooth (3) of the end face of inner tube circumferentially, each sawtooth (3) are inclined in the axis direction perpendicular to injection inner tube
Turn, and the yawing moment of the adjacent sawtooth of each two is opposite.
3. injector as claimed in claim 2, it is characterised in that the deflection angle of each sawtooth is less than 45 degree.
4. injector as claimed in claim 3, it is characterised in that the injection outer tube includes oared segrne pii and oared segrne pii
Connection wait straight section and with etc. the bend loss that is connected of straight section, the oared segrne pii is positioned close to the injection inner tube and spiral shell
Revolve one end of paddle motor connection.
5. injector as claimed in claim 4, it is characterised in that the axial direction side along the injection inner tube of the injection inner tube
To size be less than the oared segrne pii add it is described wait straight section the direction size and more than the oared segrne pii in the party
To size.
6. injector as claimed in claim 1, it is characterised in that the gap between the injection outer tube and the injection inner tube
For 300 millimeters to 500 millimeters.
7. injector as claimed in claim 3, it is characterised in that the sawtooth is made of stainless steel material.
8. injector as claimed in claim 7, it is characterised in that the sawtooth bottom carries out rounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721150090.8U CN207195041U (en) | 2017-09-08 | 2017-09-08 | A kind of injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721150090.8U CN207195041U (en) | 2017-09-08 | 2017-09-08 | A kind of injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207195041U true CN207195041U (en) | 2018-04-06 |
Family
ID=61791936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721150090.8U Active CN207195041U (en) | 2017-09-08 | 2017-09-08 | A kind of injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207195041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107703A (en) * | 2021-04-08 | 2021-07-13 | 西北工业大学 | Spray tube air hole flow control structure |
-
2017
- 2017-09-08 CN CN201721150090.8U patent/CN207195041U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107703A (en) * | 2021-04-08 | 2021-07-13 | 西北工业大学 | Spray tube air hole flow control structure |
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