CN220298752U - Unmanned aerial vehicle oil tank air entraining and pressurizing system - Google Patents
Unmanned aerial vehicle oil tank air entraining and pressurizing system Download PDFInfo
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- CN220298752U CN220298752U CN202321475728.0U CN202321475728U CN220298752U CN 220298752 U CN220298752 U CN 220298752U CN 202321475728 U CN202321475728 U CN 202321475728U CN 220298752 U CN220298752 U CN 220298752U
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- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 88
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000010729 system oil Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 13
- 239000003502 gasoline Substances 0.000 description 7
- 230000006837 decompression Effects 0.000 description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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Abstract
The utility model discloses an unmanned aerial vehicle oil tank air entraining and pressurizing system, and belongs to the technical field of unmanned aerial vehicle fuel system oil tank pressurization; the device comprises a one-way valve, an air filter, a pressure reducer, a flow limiting piece, an air-entraining electric switch, a pressure sensor and a safety valve; the one-way valve, the air filter, the pressure reducer, the flow limiting piece and the air entraining electric switch are sequentially connected between the pressure stabilizing tank of the turbocharging piston engine of the unmanned aerial vehicle and the unmanned aerial vehicle oil tank through pipelines, so that the pressure stabilizing tank is communicated with the unmanned aerial vehicle oil tank through air; the pressure sensor is arranged in the unmanned aerial vehicle oil tank and is used for monitoring the internal pressure of the unmanned aerial vehicle oil tank; the safety valve is connected with the unmanned aerial vehicle oil tank and is used for automatically adjusting the air pressure in the unmanned aerial vehicle oil tank. The air entraining and pressurizing system adopts compressed air led from the pressure stabilizing tank of the turbocharging piston engine to realize the pressurization of the unmanned aerial vehicle oil tank, does not use additional pressurizing equipment, and has the characteristics of compact structure, light weight, high air entraining efficiency and high reliability.
Description
Technical Field
The utility model belongs to the technical field of pressurization of fuel tanks of unmanned aerial vehicle fuel systems, and particularly relates to an unmanned aerial vehicle fuel tank air-entraining pressurization system.
Background
When the unmanned aerial vehicle takes off in a high-temperature environment and climbs at a high speed and flies at a high altitude, the air pressure in the oil tank gradually decreases along with the increase of the flying altitude, and when the pressure in the oil tank approaches to and reaches the current temperature saturated vapor pressure of the gasoline, the gasoline in the oil tank gradually gasifies and finally boils, so that the oil supply is discontinuous, and the engine cannot work stably; on the other hand, cavitation is generated when the oil feed pump runs idle without oil, and the service life of the oil pump is influenced. Therefore, the fuel tank of the unmanned aerial vehicle taking gasoline as fuel needs to be pressurized timely according to the characteristic of the gasoline, so that the gasification of the gasoline is avoided.
In order to solve the problem of high-altitude vaporization of fuel oil, most unmanned aerial vehicles at present adopt modes of a secondary booster oil pump, filling inert gas into an oil tank, introducing air into a turbine engine compressor for pressurization and the like, obtain a certain effect, and are widely used on large-scale airplanes, but small and medium-sized unmanned aerial vehicles taking a piston engine as power are limited by energy sources, structures, spaces, loading and the like, the engines of the small and medium-sized unmanned aerial vehicles taking the piston engine as power are mainly supplied with oil by a simple oil pump at present, the pressurization of the high-altitude oil tank is provided with a pressurized air source by an air compressor of the unmanned aerial vehicle, the system design is relatively complex, the volume and weight burden are increased, the maintenance is complex, the efficiency of the high-altitude air compressor is lower, and the working reliability of a pressurizing system is not high, and the unmanned aerial vehicle oil tank introducing air pressurizing system is provided for the purpose.
Disclosure of Invention
The technical problems to be solved are as follows:
in order to avoid the defects of the prior art, the utility model provides an unmanned aerial vehicle oil tank air entraining and pressurizing system, which is suitable for a small and medium-sized unmanned aerial vehicle taking a turbo-charged piston engine as power, and solves the problems of complex design, increased volume and weight burden, complex maintenance, lower efficiency and low working reliability existing in the prior art that an air compressor pressurizing system is used for avoiding the insufficient air pressure of an oil tank when the small and medium-sized unmanned aerial vehicle using the turbo-charged piston engine flies at high speed and high altitude by sequentially installing a one-way valve, an air filter, a pressure reducer, a current limiting plate, an air entraining electric switch, a pressure sensor arranged in the unmanned aerial vehicle oil tank and a safety valve connected with the unmanned aerial vehicle oil tank.
The technical scheme of the utility model is as follows: the unmanned aerial vehicle oil tank air-entraining pressurization system comprises a one-way valve 3, an air filter 4, a pressure reducer 5, a flow limiting piece 6, an air-entraining electric switch 7, a pressure sensor 10 and a safety valve 8;
the one-way valve 3, the air filter 4, the pressure reducer 5, the flow limiting piece 6 and the air entraining electric switch 7 are sequentially connected between the pressure stabilizing tank 2 and the unmanned aerial vehicle oil tank 9 of the unmanned aerial vehicle turbocharging piston engine 1 through pipelines, so that the pressure stabilizing tank 2 is in air communication with the unmanned aerial vehicle oil tank 9;
the pressure sensor 10 is arranged in the unmanned aerial vehicle oil tank 9 and is used for monitoring the pressure in the unmanned aerial vehicle oil tank 9;
the safety valve 8 is connected with the unmanned aerial vehicle oil tank 9 and is used for automatically adjusting the air pressure in the unmanned aerial vehicle oil tank 9.
The utility model further adopts the technical scheme that: the inlet end of the check valve 3 is connected with the surge tank 2 through a pipeline, the outlet end of the check valve 3 is connected with the inlet end of the air filter 4 through a pipeline, and the check valve 3 is used for preventing oil gas in the unmanned aerial vehicle oil tank 9 from reversely filling into the surge tank 2.
The utility model further adopts the technical scheme that: the outlet end of the air filter 4 is connected with the inlet end of the pressure reducer 5 through a pipeline, and the air filter 4 is used for filtering impurities in the compressed gas introduced from the surge tank 2.
The utility model further adopts the technical scheme that: the outlet end of the pressure reducer 5 is connected with the inlet end of the flow limiting sheet 6 through a pipeline, and the pressure reducer 5 is used for reducing the pressure of the introduced compressed gas to a pressure value which can be tolerated by the unmanned aerial vehicle oil tank 9.
The utility model further adopts the technical scheme that: the outlet end of the flow limiting piece 6 is connected with the bleed air inlet end of the bleed air electric switch 7, and the flow limiting piece 6 is used for limiting the flow of the compressed gas after decompression adjustment of the decompression device 5.
The utility model further adopts the technical scheme that: the air-entraining electric switch 7 is a two-position three-way electric control valve, the outlet end of the air-entraining electric switch 7 is connected with the unmanned aerial vehicle oil tank 9 through a pipeline, the air-entraining electric switch 7 is electrically connected with the unmanned aerial vehicle measurement and control device, and the air-entraining electric switch is controlled by the unmanned aerial vehicle measurement and control device to open the air-entraining electric control valve for pressurizing or switching on the atmosphere for the unmanned aerial vehicle oil tank 9.
The utility model further adopts the technical scheme that: the pressure sensor 10 is electrically connected with the unmanned aerial vehicle measurement and control device and is used for transmitting pressure monitoring data to the measurement and control device.
The utility model further adopts the technical scheme that: the surge tank 2 of the turbocharged piston engine 1 is connected to a turbocharger of the turbocharged piston engine 1.
Advantageous effects
The utility model has the beneficial effects that: according to the unmanned aerial vehicle oil tank air-entraining pressurization system, the air compressed in the pressure-stabilizing tank of the turbocharging piston engine is adopted to realize pressurization of the unmanned aerial vehicle oil tank, no additional pressurization equipment is used, a one-way valve, an air filter, a pressure reducer, a current limiting piece and an air-entraining electric switch are sequentially connected between the pressure-stabilizing tank of the turbocharging piston engine and the unmanned aerial vehicle oil tank through pipelines, the air compressed in the pressure-stabilizing tank is introduced into the unmanned aerial vehicle oil tank, a pressure sensor is arranged in the unmanned aerial vehicle oil tank to monitor pressure, monitoring information is transmitted to an unmanned aerial vehicle measurement and control device, the opening time of the air-entraining electric switch is controlled by the measurement and control device, the air pressure in the oil tank is automatically regulated through the connecting safety valve of the unmanned aerial vehicle oil tank, and the air pressure in the unmanned aerial vehicle oil tank is prevented from exceeding a safety range. The bleed air supercharging system does not increase the structural complexity of the unmanned aerial vehicle and does not influence the output effective power of the engine.
Through the structure, the high-altitude gasoline evaporation loss can be effectively reduced, the cavitation of the oil pump is prevented, and the stable operation of the engine is ensured. Meanwhile, the utility model simplifies the mechanical links of air entraining and pressurizing, realizes automatic control of the opening time of air entraining and pressurizing of the unmanned aerial vehicle oil tank, does not need to pre-cool compressed air and adjust the air entraining flow in real time, and has the advantages of simple pressure monitoring, compact structure, light weight, high air entraining efficiency and high reliability.
Drawings
Fig. 1 is a schematic diagram of an unmanned aerial vehicle oil tank bleed air boost system of the present utility model.
Reference numerals illustrate: 1. the engine comprises a turbo-charged piston engine 2, a surge tank 3, a one-way valve 4, an air filter 5, a pressure reducer 6, a flow limiting piece 7, a bleed air electric switch 8, a safety valve 9, an unmanned aerial vehicle oil tank 10 and a pressure sensor.
Detailed Description
The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
Referring to fig. 1, the air entraining and pressurizing system for the unmanned aerial vehicle oil tank is suitable for pressurizing an air tank of a small and medium unmanned aerial vehicle powered by a turbocharged piston engine, and comprises a one-way valve 3, an air filter 4, a pressure reducer 5, a flow limiting piece 6, an air entraining electric switch 7, a pressure sensor 10 and a safety valve 8.
The surge tank 2 of the unmanned aerial vehicle turbocharged piston engine 1 is connected with a turbocharger of the turbocharged piston engine 1, and when the engine works, the turbocharger can boost intake air and input the intake air into the surge tank 2.
The one-way valve 3, the air filter 4, the pressure reducer 5, the flow limiting piece 6 and the air entraining electric switch 7 are sequentially connected between the pressure stabilizing tank 2 and the unmanned aerial vehicle oil tank 9 of the turbocharging piston engine 1 through pipelines, so that the pressure stabilizing tank 2 is in air communication with the unmanned aerial vehicle oil tank 9, and compressed air in the pressure stabilizing tank 2 can sequentially pass through the one-way valve 3, the air filter 4, the pressure reducer 5, the flow limiting piece 6 and the air entraining electric switch 7 and enter the unmanned aerial vehicle oil tank 9 to realize the pressurization of the oil tank.
Specifically, the inlet end of the check valve 3 is connected with the surge tank 2 through a pipeline, the outlet end of the check valve is connected with the inlet end of the air filter 4 through a pipeline, and the check valve 3 is used for preventing oil gas in the unmanned aerial vehicle oil tank 9 from reversely filling into the surge tank 2. The outlet end of the air filter 4 is connected with the inlet end of the pressure reducer 5 through a pipeline, and the air filter 4 is used for filtering impurities in the compressed gas introduced from the pressure stabilizing tank 2, so as to avoid polluting the fuel in the unmanned aerial vehicle oil tank 9. The outlet end of the pressure reducer 5 is connected with the inlet end of the flow limiting sheet 6 through a pipeline, and the pressure reducer 5 is used for reducing the pressure of the introduced compressed gas to a pressure value which can be tolerated by the unmanned aerial vehicle oil tank 9. The outlet end of the flow limiting piece 6 is connected with the bleed air inlet end of the bleed air electric switch 7, and the flow limiting piece 6 is used for limiting the flow of compressed gas after decompression adjustment of the pressure reducer 5. The air-entraining electric switch 7 is a two-position three-way electric control valve used in an oil gas pipeline, the air channel outlet end of the air-entraining electric switch 7 is connected with the unmanned aerial vehicle oil tank 9 through a pipeline, the air-entraining electric switch 7 is electrically connected with a measurement and control device of the unmanned aerial vehicle, and the air-entraining electric switch is controlled to act through the unmanned aerial vehicle measurement and control device, so that the air-entraining supercharging is started or closed. Under the condition that the bleed air electric switch 7 is turned on, the pressure stabilizing tank 2 is connected, so that the unmanned aerial vehicle oil tank 9 is communicated with the pressure stabilizing tank 2, and bleed air pressurization is realized; when the bleed air electric switch 7 is closed, the external atmosphere is switched on, and the unmanned aerial vehicle oil tank 9 is switched on to atmosphere.
The pressure sensor 10 is arranged in the unmanned aerial vehicle oil tank 9 and is used for monitoring the pressure in the unmanned aerial vehicle oil tank 9 in real time; the pressure sensor 10 is electrically connected with the unmanned aerial vehicle measurement and control device and is used for transmitting pressure monitoring data to the measurement and control device.
The safety valve 8 is connected with the unmanned aerial vehicle oil tank 9 and is used for automatically adjusting the air pressure in the unmanned aerial vehicle oil tank 9 and ensuring that the pressure value in the unmanned aerial vehicle oil tank 9 is in a safety range.
The utility model discloses a use instruction of an unmanned aerial vehicle oil tank air entraining and pressurizing system, which comprises the following steps:
the pressure sensor 10 positioned in the unmanned aerial vehicle oil tank 9 monitors the oil tank pressure in real time and transmits monitoring information to the unmanned aerial vehicle measurement and control device, when the unmanned aerial vehicle flies to the height where the pressure in the unmanned aerial vehicle oil tank 9 needs to be boosted, namely, the pressure in the unmanned aerial vehicle oil tank 9 is close to the current saturated vapor pressure of the gasoline temperature, the measurement and control device of the unmanned aerial vehicle starts the air-entraining electric switch 7, compressed air is led out from the pressure stabilizing tank 2, the compressed air is filtered by the air filter 4 after passing through the one-way valve 3, and after the compressed air is stabilized to the designed boost pressure in the pressure reducer 5, the compressed air is output to the current limiting piece 6 to set the air-entraining flow, and finally enters the unmanned aerial vehicle oil tank 9 for boosting. When the flying height of the unmanned aerial vehicle is reduced to a height at which pressurization of the unmanned aerial vehicle oil tank 9 is not needed, namely, the pressure value monitored by the pressure sensor 10 is higher than the pressurization set value, the unmanned aerial vehicle measurement and control device closes the air-entraining electric switch 7, and the environmental atmosphere is injected into the unmanned aerial vehicle oil tank 9.
When the introduced high-pressure gas fills the unmanned aerial vehicle oil tank 9, the gas pressure in the unmanned aerial vehicle oil tank 9 reaches the upper limit of the safety allowance of the oil tank structure, and the safety valve 8 is automatically opened to enable the unmanned aerial vehicle oil tank 9 to be communicated with the atmosphere, and excessive gas is discharged, so that the safety of the unmanned aerial vehicle oil tank 9 is ensured; when the air pressure in the unmanned aerial vehicle oil tank 9 is released to be lower than the set pressure, the safety valve 8 is automatically closed, and the unmanned aerial vehicle oil tank 9 continues to carry out air entraining and pressurizing.
If the pressure reducer 5 fails, for example, the pressure reducing function is lost, the pressure of the unmanned aerial vehicle oil tank 9 rises to the upper limit of the safety margin of the oil tank structure after reaching the pressure increasing target, and at the moment, the safety valve 8 is automatically opened, so that the unmanned aerial vehicle oil tank 9 is opened to the atmosphere, excessive gas is discharged, and the safety of the unmanned aerial vehicle oil tank 9 is ensured. The safety valve 8 is designed to open a safety threshold according to the use requirement, and can be automatically opened when the pressure in the unmanned aerial vehicle oil tank 9 reaches the safety threshold.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (7)
1. The utility model provides an unmanned aerial vehicle oil tank air entrainment booster system which characterized in that: comprises a one-way valve (3), an air filter (4), a pressure reducer (5), a flow limiting sheet (6), an air-entraining electric switch (7), a pressure sensor (10) and a safety valve (8);
the one-way valve (3), the air filter (4), the pressure reducer (5), the flow limiting piece (6) and the air-entraining electric switch (7) are sequentially connected between the pressure stabilizing tank (2) of the unmanned aerial vehicle turbocharging piston engine (1) and the unmanned aerial vehicle oil tank (9) through pipelines, so that the pressure stabilizing tank (2) and the unmanned aerial vehicle oil tank (9) are in air communication;
the bleed air electric switch (7) is a two-position three-way electric control valve, and the outlet end of the bleed air electric switch is connected with the unmanned aerial vehicle oil tank (9) through a pipeline; the bleed air electric switch (7) is electrically connected with the unmanned aerial vehicle measurement and control device, and the switch of the bleed air electric switch is controlled by the unmanned aerial vehicle measurement and control device and is used for starting the bleed air for pressurizing or switching on the atmosphere for the unmanned aerial vehicle oil tank (9);
the pressure sensor (10) is arranged in the unmanned aerial vehicle oil tank (9) and is used for monitoring the internal pressure of the unmanned aerial vehicle oil tank (9);
the safety valve (8) is connected with the unmanned aerial vehicle oil tank (9) and is used for automatically adjusting the air pressure in the unmanned aerial vehicle oil tank (9).
2. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the inlet end of the one-way valve (3) is connected with the pressure stabilizing box (2) through a pipeline, the outlet end of the one-way valve is connected with the inlet end of the air filter (4) through a pipeline, and the one-way valve (3) is used for preventing oil gas in the unmanned aerial vehicle oil box (9) from reversely filling into the pressure stabilizing box (2).
3. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the outlet end of the air filter (4) is connected with the inlet end of the pressure reducer (5) through a pipeline, and the air filter (4) is used for filtering impurities in the compressed gas introduced from the pressure stabilizing box (2).
4. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the outlet end of the pressure reducer (5) is connected with the inlet end of the flow limiting piece (6) through a pipeline, and the pressure reducer (5) is used for reducing the pressure of the introduced compressed gas to a pressure value which can be tolerated by the unmanned aerial vehicle oil tank (9).
5. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the outlet end of the flow limiting piece (6) is connected with the bleed air inlet end of the bleed air electric switch (7), and the flow limiting piece (6) is used for limiting the flow of compressed gas subjected to pressure reducing adjustment of the pressure reducer (5).
6. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the pressure sensor (10) is electrically connected with the unmanned aerial vehicle measurement and control device and is used for transmitting pressure monitoring data to the measurement and control device.
7. The unmanned aerial vehicle sump bleed air pressurization system of claim 1, wherein: the surge tank (2) of the turbocharged piston engine (1) is connected with a turbocharger of the turbocharged piston engine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321475728.0U CN220298752U (en) | 2023-06-10 | 2023-06-10 | Unmanned aerial vehicle oil tank air entraining and pressurizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321475728.0U CN220298752U (en) | 2023-06-10 | 2023-06-10 | Unmanned aerial vehicle oil tank air entraining and pressurizing system |
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| Publication Number | Publication Date |
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| CN220298752U true CN220298752U (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321475728.0U Active CN220298752U (en) | 2023-06-10 | 2023-06-10 | Unmanned aerial vehicle oil tank air entraining and pressurizing system |
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| Country | Link |
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| CN (1) | CN220298752U (en) |
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2023
- 2023-06-10 CN CN202321475728.0U patent/CN220298752U/en active Active
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