CN107618668B - Aviation dragging mechanism based on wind damping - Google Patents
Aviation dragging mechanism based on wind damping Download PDFInfo
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- CN107618668B CN107618668B CN201710767749.2A CN201710767749A CN107618668B CN 107618668 B CN107618668 B CN 107618668B CN 201710767749 A CN201710767749 A CN 201710767749A CN 107618668 B CN107618668 B CN 107618668B
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Abstract
The invention discloses an aviation dragging mechanism based on wind power damping, and belongs to the field of design of damping devices of aviation dragging systems. The method comprises the following steps: the wind resistance system is arranged at the front end part of the cabin body and is provided with an air inlet air door, wind resistance blades, a wind resistance wheel shaft and an exhaust air door; the wind resistance blade is arranged between the air inlet air door and the air outlet air door and is connected with the transmission steering system through a wind resistance wheel shaft; the transmission steering system is provided with two mutually meshed transmission gears and two mutually meshed steering gears; one transmission gear is coaxial with one steering gear, the other steering gear is connected with a wind resistance wheel shaft, and the other transmission gear is connected with a throwing system; the coiling mechanism is wound with a traction rope for connecting a bait bullet and is coaxial with the other transmission gear; the throwing movable opening cover slides along the slide rails positioned on the two sides of the throwing movable opening cover, and the bait bullets are placed on the throwing movable opening cover. The invention effectively avoids rope fracture, and the wind power damping mechanism can reduce additional energy consumption.
Description
Technical Field
The invention belongs to the technical field of design of damping devices of aviation dragging systems, and particularly relates to an aviation dragging mechanism based on wind power damping.
Background
In order to improve self-defense and survivability of the aircraft, most of the warplanes are additionally provided with the towing bait on the airborne platform, the device can generate interference on a radar and an infrared detection system, the flying performance of the airborne aircraft is not influenced, and the use is convenient and reliable. The airborne bait bullets are stored in the pod and fly with the carrier through the towing cables after being released. Before the hoisting cable is thrown, the traction cable is wound on a winding mechanism in the hoisting cabin. After the bait is thrown out, the relative speed of the projectile body and the carrier is increased continuously under the influence of gravity and air resistance, and the coiling mechanism stops rotating after a preset distance is reached. The traction rope is tensioned at the moment that the winding mechanism stops rotating, the internal stress is increased rapidly, and the traction rope is easy to break. If the releasing speed of the bait bomb is controlled in the throwing process, the instant stress of the traction cable can be effectively reduced when the throwing process is finished, and the phenomenon of traction cable breakage is avoided.
The common resistance reduction methods comprise motor braking, an inflatable air bag and the like, a motor device needs to consume large electric energy and has a complex structure, and the inflatable air bag needs to be frequently replaced due to friction between the inflatable air bag and a traction cable.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems, the invention provides an aviation dragging mechanism based on wind damping, which adopts the technical scheme that wind provides damping torque for wind resistance blades, realizes speed control when the dragging object is released, reduces the instantaneous stress of a traction cable when a winding shaft stops rotating, prevents the traction cable from being broken, and reduces the volume and the weight of the winding mechanism.
The technical scheme of the invention is as follows: an aero drag mechanism based on wind damping comprising:
the wind resistance system is arranged at the front end part of the cabin body and is provided with an air inlet air door, wind resistance blades, a wind resistance wheel shaft and an exhaust air door;
the wind resistance blades are arranged between the air inlet air door and the air outlet air door and are connected with a transmission steering system through a wind resistance wheel shaft;
the transmission steering system is provided with two mutually meshed transmission gears and two mutually meshed steering gears;
one transmission gear is coaxial with one steering gear, the other steering gear is connected with the wind resistance wheel shaft, and the other transmission gear is connected with the throwing system;
the throwing system is provided with a wire coiling mechanism, a throwing movable opening cover and a slide rail; the coiling mechanism is wound with a traction cable for connecting a bait bullet, and a reel of the coiling mechanism is coaxial with the other transmission gear;
the throwing movable opening cover slides along the slide rails positioned on the two sides of the throwing movable opening cover, and the bait bullets are placed on the throwing movable opening cover.
Preferably, a fairing is arranged between the wind resistance system and the transmission steering system, the fairing is arranged behind an exhaust air door, and the wind resistance wheel shaft penetrates through the fairing to be connected with the other steering gear.
Preferably, the wind resistance system is provided with a wheel axle support, and the wheel axle support is provided with a Y-shaped strut and is connected with the cabin body through the Y-shaped strut;
the wheel axle support is provided with a mounting seat, and the wind resistance wheel axle penetrates through the mounting seat and can rotate relative to the wheel axle support.
Preferably, a traction cable guider is arranged between the coiling mechanism and the bait bullet;
the traction cable guider comprises a groove-shaped fixing device and a guide wheel, wherein the guide wheel is arranged in the groove-shaped fixing device and is arranged on a cabin body bottom plate through one end of the groove-shaped fixing device;
the traction rope passes through the guide wheel and is connected with the bait bomb.
Preferably, the traction cable guider is provided with a limiting cover, and the limiting cover is arranged at the upper part of the guide wheel;
the limiting cover is provided with a limiting groove in a matching mode with the traction cable.
Preferably, the tow rope guide is provided with a speed sensor mounted near the lower edge of the guide wheel.
Preferably, the air resistance system is provided with a linkage mechanism for the synchronous operation of the intake damper and the exhaust damper.
Preferably, the throwing movable opening cover adopts a split structure and is divided into a left part and a right part.
The technical scheme of the invention has the beneficial technical effects that: according to the invention, wind damping formed by the fan blades is utilized, so that the instant tensile stress of the traction cable when the throwing is finished is weakened, the breakage of the rope is effectively avoided, the space of a winding mechanism is saved, and the weight reduction of the nacelle is realized. Meanwhile, the wind power damping mechanism can reduce extra energy consumption, has good engineering applicability and can be applied to different fields.
Drawings
FIG. 1 is a schematic structural component diagram of a preferred embodiment of an aviation towing mechanism based on wind damping according to the present invention;
FIG. 2 is a schematic view of the installation of the drop movable door of the embodiment shown in FIG. 1;
FIG. 3 is a schematic illustration of the embodiment of the pull cable guide of FIG. 1;
the device comprises an air inlet air door, an air resistance blade, a wind resistance wheel shaft, a 4 exhaust air door, a transmission gear, a 6 steering gear, a 7 coiling mechanism, a 8 throwing movable opening cover, a 9 sliding rail, a 10 bait bullet, a 11 traction cable, a 12 fairing, an axle support 13, a 14 traction cable guider, a 15 groove-type fixing device, a 16 guide wheel, a 17 limiting cover and a 18 speed sensor.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
As shown in fig. 1: an aero drag mechanism based on wind damping comprising: the system comprises a wind resistance system, a transmission steering system and a throwing system;
the wind resistance system is arranged at the front end part of the cabin body and is provided with an air inlet air door 1, wind resistance blades 2, a wind resistance wheel shaft 3 and an exhaust air door 4;
the wind resistance blades 2 are arranged between the air inlet air door 1 and the air outlet air door 4, and the wind resistance blades 2 are connected with the transmission steering system through a wind resistance wheel shaft 3;
the transmission steering system is provided with two mutually meshed transmission gears 5 and two mutually meshed steering gears 6;
one transmission gear 5 is coaxial with one steering gear 6, the other steering gear 6 is connected with the wind resistance wheel shaft 3, and the other transmission gear 5 is connected with the throwing system;
the throwing system is provided with a wire winding mechanism 7, a throwing movable opening cover 8 and a slide rail 9;
the coiling mechanism 7 is wound with a traction cable 11 for connecting a bait bullet 10, and the reel of the coiling mechanism 7 is coaxial with the other transmission gear 5;
the throwing movable opening cover 8 slides along the slide rails 9 positioned at the two sides of the throwing movable opening cover, and the bait bomb 10 is placed on the throwing movable opening cover 8.
In the aviation dragging mechanism based on wind damping, a wind resistance wheel shaft 3 connected with a wind resistance blade 2 is vertical to a winding shaft of a winding mechanism 7, and linkage is realized through a steering gear 6 and a transmission gear 5. The rotation of the wind resistance wheel shaft 3 can be driven by the gravity acting on the elastomer or the rotation of the wind resistance blades at the air inlet, the wind resistance wheel shaft and the wind resistance wheel shaft have opposite rotating effects, and the final rotation direction and the rotation speed of the wind resistance wheel shaft depend on the driving force of the wind resistance wheel shaft and the wind resistance blade.
After the bait bullet 10 is thrown, the wind resistance wheel shaft rotates clockwise through the traction cable and the transmission mechanism; after the wind power damping system is started, airflow flows through the blades to enable the wind resistance wheel shaft to obtain anticlockwise moment, the moment can not change the rotating direction of the wind resistance wheel shaft, but can reduce the rotating speed of the wind resistance wheel shaft, and therefore wind power is converted into braking force to generate damping.
In this embodiment, a fairing 12 is arranged between the wind resistance system and the transmission steering system, the fairing 12 is arranged behind the exhaust air door 4, and the wind resistance wheel shaft 3 penetrates through the fairing 12 to be connected with another steering gear 6, so that the stability of a flow field of the ventilation duct is ensured, and the efficiency of the wind resistance system is improved.
In this embodiment, the wind resistance system is provided with an axle support 13, the axle support 13 is provided with a Y-shaped support, and is connected with the cabin body through the Y-shaped support, the axle support 13 is provided with a mounting seat, and the wind resistance axle 3 passes through the mounting seat and can rotate relative to the axle support 13.
The wheel axle support 13 is provided with a Y-shaped support and a mounting seat, so that the rotating stability of the wind resistance wheel axle 3 is improved, and the rotating torque generated by the bait bomb 10 is efficiently transmitted to the wind resistance blades 2.
It can be understood that: the wheel axle support 13 can be designed in other forms of construction, for example: cross type, X type etc. as long as satisfy the support intensity of installation space and windage pivot.
In this embodiment, the wind resistance system is further provided with a link mechanism, the link mechanism is used for synchronous operation of the air intake damper 1 and the air exhaust damper 4, the air intake damper and the air exhaust damper are in a linked state, and the air intake damper and the air exhaust damper are kept to be opened and closed simultaneously, so that circulation of air and stability of a flow field are ensured.
As shown in fig. 2: in this example, put in movable flap 8 and adopt split type structure, divide into about two parts, about two parts slide along the track 9 of putting in movable flap 8 both sides respectively and form the required mouth of puting in of bait bullet 10, for reducing the air current and disturbing, bait bullet 10 throws out the back, puts in movable flap 8 and draws in automatically under the action of gravity, and the mouth of puting in is closed.
The throwing movable opening cover 8 adopts a split structure and is respectively opened towards the two sides in a sliding mode, the release path of the traction cable 11 cannot interfere with the throwing movable opening cover 8, and therefore throwing of the bait bomb 10 cannot be influenced.
As shown in fig. 3: in order to prevent the traction cable 11 from winding during the releasing process of the bait cartridge 10, a traction cable guider 14 is arranged between the winding mechanism 7 and the bait cartridge 10;
the traction cable guider 14 comprises a groove-shaped fixing device 15 and a guide wheel 16, wherein one end of the groove-shaped fixing device 15 is provided with a mounting groove for mounting the guide wheel 16, and the guide wheel 16 is hinged on the inner wall of the mounting groove in the groove-shaped fixing device 15 through a plug-in mounting bolt and can rotate around the mounting bolt;
the other end of the groove-shaped fixing device 15 extends to the bottom of the cabin body to form a mounting rod, the traction cable guider 14 is mounted on a bottom plate of the cabin body through the mounting rod, the mounting height of the guide wheel 14 can be designed according to needs, and the mounting position is determined according to the release path of the traction cable 11.
The guide wheel 16 is provided with a guide groove which is matched with the traction cable 11, the traction cable 11 passes through the guide groove to be connected with the bait bullet 10, and the release of the traction cable 11 along the set path is ensured.
In order to make the bait bullet 10 release more smoothly, in this embodiment, the tow guide 14 is provided with a limit cap 17, and the limit cap 17 is installed on the upper part of the guide wheel 16; the limiting cover 17 is provided with a limiting groove in a matching mode with the traction cable 11, the limiting groove 17 can limit the traction cable 11 to be separated from the guide wheel 14, the rotation of the guide wheel 14 is not interfered, and meanwhile the speed monitoring accuracy is guaranteed.
In this embodiment, the tow guide 14 is provided with a speed sensor 18, the speed sensor 18 being mounted near the lower edge of the guide wheel 16 for knowing the launch speed of the bait cartridge 10.
Determining the maximum allowable release speed V of the projectile body according to the projectile body throwing requirement and the traction cable material in the structural design process; the wind resistance system can be started after the throwing movable opening cover 8 is opened, and the size of wind force damping is adjusted through the air inlet flow of the air inlet air door. In the whole throwing process, a pilot selects a proper air inlet according to the speed feedback of the speed sensor so as to ensure that the projectile is thrown to a specified distance under the condition that the allowable speed V is not exceeded.
It can be understood that: the fan blade angle, the page width, the number of blades and the like of the wind resistance impeller are selected according to the thrown projectile body and the throwing requirement, and the overall dimension of the cabin body is determined.
It can be understood that: a steering gear and a transmission gear in the transmission steering system select proper transmission ratio and tooth profile parameters, and frictional resistance in the transmission process is reduced as much as possible.
The implementation is that when the bait bomb 10 needs to be thrown, the throwing movable cover 8 is opened to release the bait bomb 10. The throwing movable opening cover 8 is opened only when the bait bomb 10 leaves the cabin, and the throwing movable opening cover 8 is closed along the preset slide rail 9 after the bait bomb 10 is separated from the cabin, so that the air flow interference is reduced.
After the bait bullet 10 is thrown, the wind resistance system can be started to realize the control of the throwing speed, and the throwing speed is ensured not to exceed the allowable speed V by increasing or reducing the size of the air inlet. The linkage of the air inlet air door 1 and the air outlet air door 4 enables the area of the air vents of the air inlet air door and the air outlet air door to be matched with each other, and the stability of a flow field is guaranteed.
When the bait bomb 10 is thrown to a preset distance, namely the traction cable 11 is completely released, the hoisting mechanism 7 is automatically locked, the transmission system or the wind resistance system stops running, the dragging system gives a throwing finish prompt, and a pilot closes an inlet valve and an exhaust valve to finish the throwing task of the bait bomb 10.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An aviation towing mechanism based on wind damping, comprising:
the wind resistance system is arranged at the front end part of the cabin body and is provided with an air inlet air door (1), wind resistance blades (2), a wind resistance wheel shaft (3) and an exhaust air door (4);
the wind resistance blades (2) are arranged between the air inlet air door (1) and the air outlet air door (4), and the wind resistance blades (2) are connected with a transmission steering system through a wind resistance wheel shaft (3);
the transmission steering system is provided with two mutually meshed transmission gears (5) and two mutually meshed steering gears (6);
one transmission gear (5) is coaxial with one steering gear (6), the other steering gear (6) is connected with the wind resistance wheel shaft (3), and the other transmission gear (5) is connected with a throwing system;
the throwing system is provided with a wire coiling mechanism (7), a throwing movable opening cover (8) and a slide rail (9); the coiling mechanism (7) is wound with a traction rope (11) for connecting a bait bullet (10), and a reel of the coiling mechanism (7) is coaxial with the other transmission gear (5);
the throwing movable opening cover (8) slides along slide rails (9) positioned on two sides of the throwing movable opening cover, and bait bullets (10) are placed on the throwing movable opening cover (8).
2. The aero drag mechanism based on wind damping as claimed in claim 1 wherein: a fairing (12) is arranged between the wind resistance system and the transmission steering system, the fairing (12) is arranged behind the exhaust air door (4), and the wind resistance wheel shaft (3) penetrates through the fairing (12) to be connected with the other steering gear (6).
3. The aero drag mechanism based on wind damping as claimed in claim 1 wherein: the wind resistance system is provided with a wheel axle support (13), the wheel axle support (13) is provided with a Y-shaped support and is connected with the cabin body through the Y-shaped support;
the wheel axle support (13) is provided with a mounting seat, and the wind resistance wheel axle (3) penetrates through the mounting seat and can rotate relative to the wheel axle support (13).
4. The aero drag mechanism based on wind damping as claimed in claim 1 wherein: a traction cable guider (14) is arranged between the coiling mechanism (7) and the bait bullet (10);
the traction cable guider (14) comprises a groove-shaped fixing device (15) and a guide wheel (16), wherein the guide wheel (16) is arranged in the groove-shaped fixing device (15) and is arranged on a cabin body bottom plate through one end of the groove-shaped fixing device (15);
the traction rope (11) passes through the guide wheel (16) and is connected with the bait bullet (10).
5. The aero drag mechanism based on wind damping as claimed in claim 4 wherein: the traction cable guider (14) is provided with a limiting cover (17), and the limiting cover (17) is arranged at the upper part of the guide wheel (16);
the limiting cover (17) and the traction cable (11) are matched with each other to form a limiting groove.
6. The aero drag mechanism based on wind damping as claimed in claim 4 wherein: the traction rope guide (14) is provided with a speed sensor (18), and the speed sensor (18) is installed close to the lower edge of the guide wheel (16).
7. The aero drag mechanism based on wind damping as claimed in claim 1 wherein: the wind resistance system is provided with a linkage mechanism, and the linkage mechanism is used for synchronous operation of the air inlet air door (1) and the air outlet air door (4).
8. The aero drag mechanism based on wind damping as claimed in claim 1 wherein: the throwing movable opening cover (8) adopts a split structure and is divided into a left part and a right part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767749.2A CN107618668B (en) | 2017-08-31 | 2017-08-31 | Aviation dragging mechanism based on wind damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710767749.2A CN107618668B (en) | 2017-08-31 | 2017-08-31 | Aviation dragging mechanism based on wind damping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107618668A CN107618668A (en) | 2018-01-23 |
| CN107618668B true CN107618668B (en) | 2020-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710767749.2A Active CN107618668B (en) | 2017-08-31 | 2017-08-31 | Aviation dragging mechanism based on wind damping |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4852455A (en) * | 1987-01-12 | 1989-08-01 | Southwest Aerospace Corporation | Decoy system |
| US6231002B1 (en) * | 1990-03-12 | 2001-05-15 | The Boeing Company | System and method for defending a vehicle |
| US5501411A (en) * | 1994-03-14 | 1996-03-26 | Southwest Aerospace Corporation | Towed vehicle deployment apparatus having guide to reduce line pull-off angle |
| US5497156A (en) * | 1994-04-15 | 1996-03-05 | Lockheed Corporation | Towed target |
| CN101575010A (en) * | 2008-05-09 | 2009-11-11 | 邓湘 | Theory and method of defending missile by fighter |
| CN204184576U (en) * | 2014-10-16 | 2015-03-04 | 刘得华 | Emulation military secret bait bullet system |
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- 2017-08-31 CN CN201710767749.2A patent/CN107618668B/en active Active
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| CN107618668A (en) | 2018-01-23 |
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