CN209382253U - A kind of deployable and collapsible abdomeinal fin - Google Patents
A kind of deployable and collapsible abdomeinal fin Download PDFInfo
- Publication number
- CN209382253U CN209382253U CN201822052569.9U CN201822052569U CN209382253U CN 209382253 U CN209382253 U CN 209382253U CN 201822052569 U CN201822052569 U CN 201822052569U CN 209382253 U CN209382253 U CN 209382253U
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- abdomeinal fin
- fuselage
- deployable
- collapsible
- abdomeinal
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Abstract
The utility model discloses a kind of deployable and collapsible abdomeinal fins, one end of the abdomeinal fin is connect by the first articulated joint with fuselage, the middle part of the abdomeinal fin is connected with jack, and the jack is fixed on fuselage interior, and the flexible position of the fuselage afterbody abdomeinal fin is equipped with two split fan hatch doors.The deployable and collapsible abdomeinal fin guarantees that aircraft engine is in idling rating, shipping-direction stability requirement under propeller low speed state, when being avoided that engine is in cruise or maximum rating again, shipping-direction stability is excessive under the high revolving speed of propeller, while can reduce full machine resistance again.
Description
Technical field
The utility model relates to airplane design technical field, specifically a kind of deployable and collapsible abdomeinal fin.
Background technique
Engine is in idling rating, and propeller aeroplane is in low speed state, propeller asymmetry power itself and slip-stream
Influence can generate yawing, would generally install abdomeinal fin additional below rear body at this time to improve shipping-direction stability.But engine
When in cruise or maximum rating, the slip velocity hauled out under propeller high-speed state is higher, has to vertical fin air-flow and adds
Speed effect, improves shipping-direction stability, abdomeinal fin can make shipping-direction stability excessive at this time, and the presence of abdomeinal fin will increase full machine
Resistance.
Utility model content
To solve the above problems, the utility model provides a kind of deployable and collapsible abdomeinal fin, propeller height can be met simultaneously and turned
The demand of fast state vector stability.
The technical solution adopted in the utility model is: a kind of deployable and collapsible abdomeinal fin, and one end of the abdomeinal fin passes through the first hinge
Connector is connect with fuselage, and the middle part of the abdomeinal fin is connected with jack, and the jack is fixed on fuselage interior, described
The flexible position of fuselage afterbody abdomeinal fin is equipped with two split fan hatch doors.
The abdomeinal fin is right angled triangle, and section is symmetrical airfoil section.
The lenth ratio of two right-angle sides of the abdomeinal fin is 3.73.
The jack is hydraulic actuator, and the hydraulic actuator is fixed in fuselage by the second articulated joint
The driving pull rod in portion, the hydraulic actuator is connected by third articulated joint with abdomeinal fin.
The two fans hatch door passes through two torque springs respectively and connect with fuselage.It can easily realize the unlatching of hatch door and close
It closes, mechanism is simple, the operation is stable, and weight is small.
The beneficial effects of the utility model are: 1, propeller high and low rotating speed state vector stability can be met simultaneously
Demand: aircraft engine is in idling rating, and when propeller low speed state, abdomeinal fin stretches out outside fuselage, to improve course-stability
Property；When engine is in cruise or maximum rating, under propeller high-speed state, abdomeinal fin takes in fuselage by jack
It is interior, it is excessive to can avoid shipping-direction stability, while full machine resistance can be reduced again, increases aircraft business efficiency.2, abdomeinal fin passes through the
One articulated joint and fuselage are hinged, and hydraulic actuator driving the flexible of pull rod rotates abdomeinal fin around articulated joint, realize abdomeinal fin
Folding and unfolding, expansion regulating mechanism is simple, the operation is stable, and weight is small.3, the split hatch door of two fans passes through two torque springs respectively
It is connect with fuselage, can easily realize the unlatching and closure of hatch door, mechanism is simple, the operation is stable, and weight is small.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the stretching state of the utility model；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the A-A cross-sectional view of Fig. 2；
Fig. 4 is the structural schematic diagram of the stretching income fuselage state of the utility model；
Fig. 5 is the B-B cross-sectional view of Fig. 4；
In figure, 1, abdomeinal fin, 2, long right-angle side, 3, short right-angle side, 4, aerofoil profile, the 5, first articulated joint, 6, third hinge
Connector, 7, driving pull rod, the 8, second articulated joint, 9, hatch door, 10, torque spring, 11, fuselage.
Specific embodiment
In order to deepen the understanding to the utility model, the utility model is made below in conjunction with embodiment and attached drawing further
It is described in detail, which is only used for explaining the utility model, does not constitute the restriction to scope of protection of the utility model.
As shown in Figures 1 to 5, a kind of deployable and collapsible abdomeinal fin, the shape of abdomeinal fin 1 are right angled triangle, long right-angle side 2 and short
The lenth ratio of right-angle side 3 is 3.73, and section is symmetrical airfoil section 4.
One end (minimum acute ends) of abdomeinal fin 1 is connect by the first articulated joint 5 with fuselage 11, and the middle part of abdomeinal fin 1 passes through
Third articulated joint 6 is connected with the driving pull rod 7 of hydraulic actuator, and hydraulic actuator is fixed on machine by the second articulated joint 8
Inside body 11.When aircraft engine is in idling rating, when propeller low speed state, abdomeinal fin stretches out outside fuselage, to improve boat
To stability；When engine is in cruise or maximum rating, under propeller high-speed state, abdomeinal fin is taken in by jack
In fuselage, it is excessive to can avoid shipping-direction stability, while full machine resistance can be reduced again, increases aircraft business efficiency；Abdomeinal fin passes through
Articulated joint is hinged with fuselage, is rotated by the flexible achievable abdomeinal fin of driving pull rod around articulated joint, realizes the receipts of abdomeinal fin
It puts, jack is simple, the operation is stable, and weight is small.
The flexible position of fuselage afterbody abdomeinal fin 1 is equipped with two split fan hatch doors 9, and two fan hatch doors 9 pass through two torsion respectively
Spring 10 is connect with fuselage, can easily realize the unlatching and closure of hatch door.
Claims (5)
1. a kind of deployable and collapsible abdomeinal fin, which is characterized in that one end of the abdomeinal fin is connect by the first articulated joint with fuselage, institute
The middle part for stating abdomeinal fin is connected with jack, and the jack is fixed on fuselage interior, what the fuselage afterbody abdomeinal fin stretched
Position is equipped with two split fan hatch doors.
2. a kind of deployable and collapsible abdomeinal fin according to claim 1, which is characterized in that the abdomeinal fin is right angled triangle, is cutd open
Face is aerofoil profile.
3. a kind of deployable and collapsible abdomeinal fin according to claim 2, which is characterized in that the length of two right-angle sides of the abdomeinal fin
Ratio is 3.73.
4. a kind of deployable and collapsible abdomeinal fin according to claim 1, which is characterized in that the jack is hydraulic actuation
Device, the hydraulic actuator are fixed on fuselage interior by the second articulated joint, and the driving pull rod of the hydraulic actuator passes through
Third articulated joint is connected with abdomeinal fin.
5. a kind of deployable and collapsible abdomeinal fin according to claim 1, which is characterized in that the two fans hatch door passes through two respectively
Torque spring is connect with fuselage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822052569.9U CN209382253U (en) | 2018-12-07 | 2018-12-07 | A kind of deployable and collapsible abdomeinal fin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822052569.9U CN209382253U (en) | 2018-12-07 | 2018-12-07 | A kind of deployable and collapsible abdomeinal fin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209382253U true CN209382253U (en) | 2019-09-13 |
Family
ID=67871153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822052569.9U Active CN209382253U (en) | 2018-12-07 | 2018-12-07 | A kind of deployable and collapsible abdomeinal fin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209382253U (en) |
-
2018
- 2018-12-07 CN CN201822052569.9U patent/CN209382253U/en active Active
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