CN213502932U - A punching press shape preserving flexible tank and unmanned aerial vehicle for it hangs rope and retrieves unmanned aerial vehicle - Google Patents
A punching press shape preserving flexible tank and unmanned aerial vehicle for it hangs rope and retrieves unmanned aerial vehicle Download PDFInfo
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- CN213502932U CN213502932U CN202021661698.9U CN202021661698U CN213502932U CN 213502932 U CN213502932 U CN 213502932U CN 202021661698 U CN202021661698 U CN 202021661698U CN 213502932 U CN213502932 U CN 213502932U
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- 238000004080 punching Methods 0.000 title claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 42
- 230000008676 import Effects 0.000 claims abstract description 10
- 239000002828 fuel tank Substances 0.000 claims description 32
- 238000011084 recovery Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 238000005086 pumping Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 239000010985 leather Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 112
- 239000000295 fuel oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010763 heavy fuel oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model discloses a punching press shape preserving flexible oil tank and unmanned aerial vehicle for it is hooked rope and retrieves unmanned aerial vehicle, including bellytank and fuel feeding tank, the one end bottom of bellytank is through intercommunication pipeline and fuel feeding tank's one end bottom intercommunication, first breather nozzle (3-1) is connected at bellytank's other end top, the import of first breather nozzle (3-1) is located bellytank's outside to with the exit linkage of first breather pipe (2-1), the export of first breather nozzle (3-1) is located bellytank's inside highest point, the import and the punching press air cock (1) of first breather pipe (2-1) are connected. Compared with the traditional metal hard oil tank, the TPU soft oil tank has the advantages of light weight, good deformability and convenience in installation and replacement. The air flow is utilized to carry out stamping shape preservation of the soft oil tank and oil supply between the main oil tank and the auxiliary oil tank, and the defects that a piston engine is difficult to bleed air, and a turbojet engine is large in bleed air pressure and high in temperature are overcome.
Description
Technical Field
The utility model belongs to the technical field of fuel oil system, especially, relate to a punching press shape preserving flexible fuel tank and unmanned aerial vehicle that is used for the hook rope recovery unmanned aerial vehicle.
Background
The small and medium-sized unmanned aerial vehicle has wide application prospect in military and civil fields, is rapidly developed in related fields at home and abroad, but has no mature and reliable oil tank product aiming at the aircraft at present at home, and does not form corresponding industrial standards and references.
The unmanned aerial vehicle is more sensitive to weight when medium and small-sized long is navigated, and its inner space is less, and the structure is relatively complicated moreover. This requires that the tank be able to accommodate the cabin structure and take full advantage of its space, while having the least possible empty weight to accommodate more fuel. Therefore, the traditional metal hard oil tank is not preferred, the empty weight is large, and the manufacture and the replacement of the oil tank with a complex structure are relatively difficult.
In contrast, small model airplanes generally use plastic fuel tanks. The plastic oil tank needs to be opened when being manufactured, belongs to a hard oil tank, and has poor adaptability to complex structures. And its material has decided this kind of oil tank to be difficult to satisfy unmanned aerial vehicle high low temperature environment's requirement, and from the experience of use, its reliability and life-span of long-term use also are all difficult to guarantee.
In this context, it is a good choice to use rubber or other materials for the soft fuel tank, and the harb drone in the united states uses the so-called membrane fuel tank, but the materials and the manufacture are not disclosed.
The soft oil tank can adopt two schemes of a thin film vacuum oil tank and a ventilation soft oil tank. Air does not advance all the time in the film vacuum oil tank, along with the continuous consumption of fuel, the oil tank shrinks gradually, though has the advantage of zero residual oil, but produces the fuel feeding untimely between the main and the auxiliary fuel tank easily, shortcomings such as the fixed difficulty of oil tank, unsuitable for being used for the great unmanned aerial vehicle in oil tank. The soft ventilation oil tank firstly solves the problem of a source of pressurized gas, and secondly solves the problem that when the amount of fuel in the tank is less, the fuel supply pipe can possibly admit air to cause unstable work of an engine or even flameout, so that zero residual fuel is difficult to achieve, and the amount of residual fuel can only be reduced as much as possible.
The small and medium-sized long-endurance unmanned aerial vehicle generally adopts a piston engine with low oil consumption rate as power, and an oil tank is generally formed by connecting a plurality of oil tanks in series/in parallel, wherein one oil tank is used as an oil supply tank. For the multiple oil tank schemes, if the fuel oil in the auxiliary oil tank cannot effectively flow into the oil supply tank in time, the residual oil of the oil tank is more finally, and the problem of unsmooth oil supply may occur in the process, which is very unfavorable for the stable operation of the engine. Therefore, how to make the fuel in each secondary fuel tank flow into the fuel supply tank effectively and completely in time is the key of multi-fuel-tank fuel supply, and there are two methods generally: one relying on gravity and the other relying on the introduction of pressurized gas from the engine or the like. For small and medium-sized unmanned aerial vehicles, the height difference between the oil tanks is limited, and it is unrealistic to make the fuel oil in the auxiliary oil tank flow into the oil supply tank timely and effectively by means of gravity; for the piston engine, it is difficult to extract continuously stable pressurized gas. Even for turbine engines, bleed air generally needs to be treated by pressure reduction, temperature reduction, etc., and bleed air causes a power loss of the engine.
The ram air flow can make the wall surface of the auxiliary oil tank expand and cling to the inner wall of the oil tank all the time. When fuel in the auxiliary fuel tank is not completely pressed into the fuel supply tank, the fuel supply tank may collapse to a certain extent due to limited stamping capability, and the soft fuel tank just can meet the deformation requirement. However, after the fuel in the auxiliary fuel tank is completely pressed into the fuel supply tank, the stamping air flow rapidly rushes into the fuel supply tank, so that the fuel supply tank is expanded to be tightly attached to the inner wall of the fuel tank, and at the moment, if the posture of the unmanned aerial vehicle is greatly changed, the fuel in the fuel supply tank may flow back to the main fuel tank. In the case where the remaining oil in the oil supply tank is small, the fuel supply may be interrupted by the backflow of the fuel.
Because of the limitation of using conditions, the taking-off and landing of small and medium-sized unmanned aerial vehicles are key processes, for example, the taking-off and landing of ships and reefs with narrow space, runways, vehicle-mounted taking-off and the like are unrealistic, and the recovery of wingtip hook hanging ropes adopted at present is an effective measure. One problem that is brought about by hook recovery is that after the rope is hung, the wings of the unmanned aerial vehicle are in a vertical state, and the left wing or the right wing is hung randomly, so that residual oil in the oil tank can leak out through the vent pipe. The traditional solution to this problem is to use a one-way valve in the snorkel, which in turn has a certain impact on space and weight.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a punching press shape preserving soft oil tank and unmanned aerial vehicle that is used for the hook rope recovery unmanned aerial vehicle that hangs.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the utility model provides a punching press shape preserving soft oil tank for sky hook string rope recovery unmanned aerial vehicle, includes bellytank and fuel feeding tank, the one end bottom of bellytank is through the one end bottom intercommunication of intercommunication pipeline with fuel feeding tank, a first breather nozzle is connected at bellytank's other end top, the import of first breather nozzle is located bellytank's outside and the exit linkage of first breather pipe, the export of first breather nozzle is located bellytank's inside highest point, the import and the punching press air cock of first breather pipe are connected.
Furthermore, an outlet of the communication pipeline, which is positioned in the oil supply tank, is connected with a backflow-preventing vertical oil pipe.
Furthermore, the communicating pipeline comprises two communicating nozzles and a tee joint, the inlet of the first communicating nozzle is positioned in the auxiliary oil tank, the outlet of the first communicating nozzle is connected with the first port of the tee joint, the outlet of the second communicating nozzle is positioned in the oil supply tank, and the inlet of the second communicating nozzle is connected with the second port of the tee joint.
And one end of the oil filling/pumping pipe is connected with a third port of the tee joint, and the other end of the oil filling/pumping pipe is connected with the oil filling/pumping self-sealing joint.
Further, the bottom of the other end of the oil supply tank is connected with an oil supply nozzle.
Further, still include second vent mouth, second vent pipe and end cap, the one end top of fuel feeding tank is connected the second vent mouth, the import of second vent mouth is located the outside of fuel feeding tank and the exit linkage of second vent pipe, the export of second vent mouth is located the inside highest point of fuel feeding tank, the import of second vent pipe is blocked by the end cap.
Furthermore, the outlets of the first ventilating nozzle and the second ventilating nozzle are in the vertical direction, and the inlets of the first ventilating nozzle and the second ventilating nozzle are in the horizontal direction.
Furthermore, the fuel tank walls of the auxiliary fuel tank and the fuel supply tank are made of polyester TPU leather with the thickness of 0.5 mm-1 mm through heat sealing.
An unmanned aerial vehicle is retrieved to sky hook string rope, includes foretell punching press shape preserving flexible tank.
Furthermore, the first ventilating nozzle and the stamping air nozzle are respectively positioned on two sides of the center line of the machine body.
Compared with the prior art, the utility model, it is showing the advantage and lies in:
(1) the main body of the oil tank is made of oil-resistant TPU leather through heat sealing, the materials are common, the process is simple, the manufacturing cost is low, the empty weight of the oil tank is small, and the oil tank is suitable for being used for small and medium-sized unmanned aerial vehicles in batches;
(2) the TPU oil tank is easy to deform, is simple and convenient to install and replace, can adapt to a complex oil tank structure after being refueled, can fully utilize the space of the oil tank to increase the oil carrying capacity, and is favorable for long voyage;
(3) the flying airflow is adopted to carry out stamping shape preservation and communication oil supply on the oil tank, so that the problem of difficulty in air entraining of a piston engine is solved, and the problems of difficulty in fixing a vacuum oil tank and easiness in blocking a communication nozzle are also solved;
(4) the auxiliary fuel tank vent nozzle and the connected airborne stamping air nozzle are positioned on two sides of the center line of the machine body, so that the problem of fuel leakage of the fuel tank after the unmanned aerial vehicle hangs a rope is solved;
(5) the connecting nozzle is connected with the vertical oil pipe with a certain height on one side of the oil supply tank, so that fuel oil in the auxiliary oil tank can be completely pressed into the oil supply tank, residual oil in the oil supply tank can not flow back to the auxiliary oil tank when the unmanned aerial vehicle is in a large posture, the residual oil is reduced as much as possible, and the unmanned aerial vehicle is favorable for long-endurance and stable work of an engine.
Drawings
Fig. 1 is a schematic diagram of a stamped conformal flexible fuel tank scheme for a skyhook lanyard recovery drone.
Fig. 2 is a schematic view of a tank breather nozzle.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
The meaning of "and/or" in the present invention means that they exist individually or both at the same time.
The term "connected" as used herein may mean either a direct connection between elements or an indirect connection between elements through other elements.
As shown in fig. 1-2, a punching press shape-preserving soft oil tank for a hook hanging rope recovery unmanned aerial vehicle comprises an auxiliary oil tank A and an oil supply tank B, wherein the bottom of one end of the auxiliary oil tank is communicated with the bottom of one end of the oil supply tank through a communication pipeline, the top of the other end of the auxiliary oil tank is connected with a first vent nozzle 3-1, an inlet of the first vent nozzle 3-1 is positioned outside the auxiliary oil tank and connected with an outlet of a first vent pipe 2-1, an outlet of the first vent nozzle 3-1 is positioned at the highest position inside the auxiliary oil tank, an inlet of the first vent pipe 2-1 is connected with the punching press air nozzle 1 and used for flying punching press air entraining, and the first vent nozzle 3-1 is connected with the opposite side of a fuselage through an external first vent pipe 2-1 in a crossed manner to prevent fuel oil leakage.
The flying speed of the unmanned aerial vehicle using the piston engine is generally not large, and is about 20-50 m/s according to the following
Calculated, the oil level of 30 mm-195 mm can be formedThe height difference, and therefore the fuel supply tank, will be stamped with the flight air flow, pressing the fuel therein into the fuel supply tank, instead of bleed air from the turbine engine.
Preferably, the outlet of the communicating pipeline in the oil supply tank is connected with a backflow-preventing vertical oil pipe 9, the specific height of the backflow-preventing vertical oil pipe is determined according to the flight speed of the unmanned aerial vehicle, the height of the backflow-preventing vertical oil pipe 9 is preferably 45mm, the height of the vertical oil pipe is determined according to the flight speed of the aircraft, as long as the flight speed reaches over 24m/s, the fuel oil in the auxiliary oil tank can be rushed into the oil supply tank by the flight airflow, meanwhile, the fuel oil cannot flow backwards when the residual oil in the oil supply tank is small, mechanical/electronic control elements such as a traditional one-way valve are not needed, the space is saved, the weight is reduced.
Preferably, the communicating pipeline comprises two communicating nozzles and a tee joint 7, an inlet of the first communicating nozzle 6-1 is located in the auxiliary oil tank, an outlet of the first communicating nozzle is connected with a first port of the tee joint 7, an outlet of the second communicating nozzle 6-2 is located in the oil supply tank, an inlet of the second communicating nozzle is connected with a second port of the tee joint 7, the communicating nozzles are of a right-angled elbow structure, and the communicating nozzles are flush with the bottom surface in the auxiliary oil tank, so that fuel oil in the auxiliary oil tank is enabled to be completely pressed into the oil supply tank during high-speed flight, and residual oil is little and is not influenced by flight attitude.
Preferably, the device also comprises an oil filling and/or oil pumping pipe 4 and an oil filling/oil pumping self-sealing joint 5, wherein one end of the oil filling and/or oil pumping pipe 4 is connected with a third port of the tee joint 7, and the other end of the oil filling and/or oil pumping pipe is connected with the oil filling/oil pumping self-sealing joint 5.
Preferably, the bottom of the other end of the oil supply tank is connected with an oil supply nozzle 10.
Preferably, still include second vent 3-2, second vent 2-2 and end cap 8, the one end top of fuel feeding tank is connected second vent 3-2, the import of second vent 3-2 is located the outside of fuel feeding tank and is connected with the exit linkage of second vent 2-2, the export of second vent 3-2 is located the inside highest point of fuel feeding tank, the import of second vent 2-2 is blocked by end cap 8, fuel feeding tank second vent 2-2 cover end cap 8 after refueling can.
Preferably, referring to fig. 2, the outlets of the first ventilating nozzle 3-1 and the second ventilating nozzle 3-2 are vertical, the inlets thereof are horizontal, and a cross-shaped anti-blocking groove structure is adopted.
Preferably, the fuel tank walls of the auxiliary fuel tank and the fuel supply tank are formed by heat sealing polyester TPU leather with the thickness of 0.5-1 mm, the fuel tank can be deformed randomly during installation and replacement without being limited by the complex structure of the fuel tank, and after the fuel tank is installed and filled with fuel, the soft fuel tank can be expanded to fill the internal structure of the whole fuel tank, so that the space is fully utilized to increase the fuel loading capacity. The flying air flow enables the oil tank to be in a stamping expansion state all the time, the thin wall of the oil tank is tightly attached to the inner wall of the oil tank without fixation, and the defect that the oil tank wall is easy to block the communication nozzle due to contraction of the vacuum thin film oil tank is avoided. The front and rear spans of the oil tank are 600mm, the side edges of the oil tank are chamfered according to the shape of the oil tank, and the wall of the oil tank and each oil nozzle are integrated through a heat seal process. This example of stamped TPU soft fuel tank has been subjected to multiple flight applications and validation on FX70 small long endurance drone. The unmanned aerial vehicle uses a piston engine, the flying speed is 25-50 m/s, the flying height is 0-5000 m, and the flying time is 24 hours; the fuel tank does not need to be fixed in the using process, and the oil leakage cannot occur after the top hook hanging rope is recovered.
An unmanned aerial vehicle is retrieved to sky hook string rope, includes foretell punching press shape preserving flexible tank.
Preferably, the first vent nozzle 3-1 and the ram air nozzle 1 are respectively located on two sides of the center line of the fuselage, and the intersection ensures that fuel oil in the fuel tank cannot leak regardless of the side of the unmanned aerial vehicle which is hung and recovered by the wing hook.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a punching press shape preserving soft oil tank for sky hook string rope recovery unmanned aerial vehicle, includes bellytank and fuel feeding tank, its characterized in that, the one end bottom of bellytank is through the one end bottom intercommunication of intercommunication pipeline with fuel feeding tank, first breather nozzle (3-1) is connected at bellytank's other end top, the import of first breather nozzle (3-1) is located bellytank's outside and the exit linkage of first breather pipe (2-1), the export of first breather nozzle (3-1) is located bellytank's inside highest point, the import and the punching press air cock (1) of first breather pipe (2-1) are connected.
2. The stamped conformal flexible fuel tank for the skyhook lanyard recovery unmanned aerial vehicle of claim 1, wherein an outlet of the communication pipeline in the fuel tank is connected with a backflow-preventing vertical fuel pipe (9).
3. The stamped conformal flexible fuel tank for the skyhook lanyard recovery unmanned aerial vehicle according to claim 2, wherein the communication pipeline comprises two communication nozzles and a tee joint (7), an inlet of the first communication nozzle (6-1) is positioned in the auxiliary fuel tank, an outlet of the first communication nozzle is connected with a first port of the tee joint (7), an outlet of the second communication nozzle (6-2) is positioned in the fuel supply tank, and an inlet of the second communication nozzle is connected with a second port of the tee joint (7).
4. The stamping shape-preserving soft oil tank for the skyhook hanging rope recovery unmanned aerial vehicle as claimed in claim 3, further comprising a refueling/oil pumping pipe (4) and a refueling/oil pumping self-sealing joint (5), wherein one end of the refueling/oil pumping pipe (4) is connected with the third port of the tee joint (7), and the other end of the refueling/oil pumping self-sealing joint (5).
5. The stamped conformal flexible oil tank for the skyhook lanyard recovery unmanned aerial vehicle of claim 1, wherein the bottom of the other end of the oil supply tank is connected with an oil supply nozzle (10).
6. The stamping shape-preserving flexible oil tank for the skyhook hanging rope recycling unmanned aerial vehicle according to claim 1, further comprising a second vent nozzle (3-2), a second vent pipe (2-2) and a plug (8), wherein the second vent nozzle (3-2) is connected to the top of one end of the oil supply tank, the inlet of the second vent nozzle (3-2) is located outside the oil supply tank and connected with the outlet of the second vent pipe (2-2), the outlet of the second vent nozzle (3-2) is located at the highest position inside the oil supply tank, and the inlet of the second vent pipe (2-2) is plugged by the plug (8).
7. The stamped conformal flexible fuel tank for the skyhook lanyard recovery unmanned aerial vehicle of claim 6, wherein the outlets of the first vent nozzle (3-1) and the second vent nozzle (3-2) are vertical and the inlets are horizontal.
8. The stamped shape-preserving flexible oil tank for the skyhook hanging rope recycling unmanned aerial vehicle according to any one of claims 1 to 7, wherein the oil tank walls of the auxiliary oil tank and the oil supply tank are thermally sealed by polyester TPU leather with the thickness of 0.5mm to 1 mm.
9. An unmanned aerial vehicle for recovering a skyhook hanging rope, which is characterized by comprising the stamping shape-retaining soft oil tank in any one of claims 1-8.
10. The sky hook hanging rope recovery unmanned aerial vehicle of claim 9, characterized in that, the first breather nozzle (3-1) and the ram air nozzle (1) are respectively located on both sides of the fuselage midline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661698.9U CN213502932U (en) | 2020-08-12 | 2020-08-12 | A punching press shape preserving flexible tank and unmanned aerial vehicle for it hangs rope and retrieves unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021661698.9U CN213502932U (en) | 2020-08-12 | 2020-08-12 | A punching press shape preserving flexible tank and unmanned aerial vehicle for it hangs rope and retrieves unmanned aerial vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN213502932U true CN213502932U (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021661698.9U Active CN213502932U (en) | 2020-08-12 | 2020-08-12 | A punching press shape preserving flexible tank and unmanned aerial vehicle for it hangs rope and retrieves unmanned aerial vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN213502932U (en) |
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2020
- 2020-08-12 CN CN202021661698.9U patent/CN213502932U/en active Active
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