CN113184201A - Elastic bag and breather valve combined fuel system temperature compensation device and fuel system - Google Patents
Elastic bag and breather valve combined fuel system temperature compensation device and fuel system Download PDFInfo
- Publication number
- CN113184201A CN113184201A CN202110537635.5A CN202110537635A CN113184201A CN 113184201 A CN113184201 A CN 113184201A CN 202110537635 A CN202110537635 A CN 202110537635A CN 113184201 A CN113184201 A CN 113184201A
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- breather valve
- fuel
- oil tank
- fuel system
- elastic bag
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- 239000000446 fuel Substances 0.000 title claims abstract description 55
- 238000002955 isolation Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 43
- 239000000295 fuel oil Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 11
- 238000007789 sealing Methods 0.000 description 10
- 230000029058 respiratory gaseous exchange Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 239000002828 fuel tank Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D37/00—Arrangements in connection with fuel supply for power plant
- B64D37/34—Conditioning fuel, e.g. heating
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to the technical field of aircraft fuel systems, and discloses a temperature compensation device of a fuel system with a combination of an elastic bag and a breather valve and the fuel system. The device includes elasticity bag, breather valve and connecting piece, the elasticity bag sets up to be used for right in the oil tank casing fuel in the oil tank casing carries out the oil gas isolation, the breather valve sets up on the connecting piece, the connecting piece with the wall is altogether to the oil tank casing, the opening part of elasticity bag passes through the connecting piece with the oil tank casing compresses tightly sealed, just the import of breather valve is located the oil tank casing is outside and be used for inhaling the gas in the external environment when opening in the elasticity bag, the export of breather valve is located the inside of elasticity bag is used for when opening will in the external environment gas in the elasticity bag exhales. The temperature compensation is carried out by adopting the mode of combining the elastic bag and the breather valve, so that the reserved air cushion amount can be reduced to the greatest extent, and the fuel filling ratio of a fuel system is improved.
Description
Technical Field
The invention relates to the technical field of aircraft fuel systems, in particular to a temperature compensation device of a fuel system with a combination of an elastic bag and a breather valve and the fuel system.
Background
The design of the fuel system of the aircraft aims to improve the fuel loading as much as possible, but due to the property of expansion and contraction of fuel, the change of pressure in the system caused by temperature change must be considered when the design of the fuel system is carried out. On one hand, the volume of the fuel oil is increased by an amount which is required to ensure that the fuel oil volume of the fuel oil system is not damaged when the temperature is extremely high, and on the other hand, the pressure in the fuel oil tank is not too low when the temperature is low, so that the fuel oil pressure is too low or the fuel oil tank is damaged by negative pressure.
The fuel oil system and the fuel oil tank are designed in a sealing mode, in order to ensure that the fuel oil expands when the temperature of the fuel oil system rises so as not to damage the structure of the fuel oil tank under the common condition, certain fuel oil needs to be discharged according to the filling temperature after the fuel oil is filled, a certain cavity is formed in the fuel oil tank to serve as an air cushion, and the excessive pressure in the fuel oil tank is prevented by utilizing the compressibility of gas. The calculation of the air cushion amount generally applies the volume expansion coefficient of fuel, the pressure change caused by the volume change of the fuel in the whole temperature range is considered under a closed container so as not to damage the structure of the fuel tank, and the air cushion amount calculated under the condition is generally larger and influences the fuel loading of a fuel system. When the temperature of the fuel system is low, the pressure in the system is too low, on one hand, the fuel tank is possibly damaged by a negative pressure generating structure, on the other hand, the fuel supply pressure of the fuel system is an important index for meeting the use requirement of an engine, and when the temperature of the fuel system is in a low temperature boundary, the size of the fuel supply pressure has an important influence on the starting reliability of the engine.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a temperature compensation device of a fuel system with a combination of an elastic bag and a breather valve and the fuel system, which can solve the problems in the prior art.
The technical solution of the invention is as follows: the utility model provides an elasticity bag and breather valve combination formula fuel oil system temperature compensation arrangement, wherein, the device includes elasticity bag, breather valve and connecting piece, the elasticity bag sets up to be used for right in the oil tank casing fuel in the oil tank casing carries out the oil gas isolation, the breather valve sets up on the connecting piece, the connecting piece with the wall is altogether to the oil tank casing, the opening part of elasticity bag passes through the connecting piece with the oil tank casing compresses tightly sealed, just the import of breather valve is located the oil tank casing is outside and be arranged in inhaling the gas in the external environment when opening in the elasticity bag, the export of breather valve is located the inside of elasticity bag is used for when opening will in the gas exhalation in the elasticity bag to the external environment.
Preferably, the elastic bag is a bag body of a flexible material.
Preferably, the flexible material comprises rubber and rubberized fabric.
Preferably, the connecting member is a flange.
Preferably, the material of the flange is metal.
The invention also provides a fuel system, which comprises the elastic bag and breather valve combined fuel system temperature compensation device.
Through the technical scheme, the temperature compensation is carried out in a mode of combining the elastic bag and the breather valve, so that the reserved air cushion amount can be reduced to the greatest extent, and the fuel filling ratio of a fuel system is improved. Compared with an oil tank with a full-sealing structure, the oil tank adopting the elastic bag and breather valve combined type fuel system temperature compensation device can reduce the air cushion amount by more than 35% (at normal temperature of 20 ℃), and the proportion of reducing the air cushion amount can be further improved along with further reduction of oil temperature during filling; moreover, the compensation device can balance the pressure of the oil tank and the external environment through the 'breathing' function of the breather valve, so that the low-temperature starting reliability of the engine is ensured while the structural safety of the oil tank is ensured; meanwhile, the combined design can ensure oil-gas isolation, ensure that the working medium of the breather valve is gas and simultaneously avoid fuel oil from contacting air to oxidize, thereby ensuring the storage, sealing and working reliability of a fuel oil system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a combined fuel system temperature compensation device with an elastic bag and a breather valve according to an embodiment of the present invention.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps that are closely related to the scheme according to the present invention are shown in the drawings, and other details that are not so relevant to the present invention are omitted.
Fig. 1 is a schematic structural diagram of a combined fuel system temperature compensation device with an elastic bag and a breather valve according to an embodiment of the present invention.
As shown in fig. 1, the embodiment of the present invention provides a fuel system temperature compensation device with a combination of an elastic bag and a breather valve, wherein, the device comprises an elastic bag 1, a breather valve 2 and a connecting piece 3, the elastic bag 1 is arranged in an oil tank shell 4 and is used for carrying out oil-gas isolation on fuel oil in the oil tank shell 4, the breather valve 2 is arranged on the connecting piece 3, the connecting piece 3 and the oil tank shell 4 share the wall surface, the opening part of the elastic bag 1 is pressed and sealed with the oil tank shell 4 through the connecting piece 3, and the inlet of the breather valve 2 is positioned outside the tank shell 4 and is used for sucking the gas in the external environment into the elastic bag 1 when being opened, the outlet of the breather valve 2 is located inside the flexible bag 1 and is used to exhale the gas inside the flexible bag 1 to the outside environment when opened.
In the invention, the elastic bag stores air, and the oil tank shell stores oil.
The inlet and the outlet of the breather valve are mechanical valves which can be opened and conducted under a certain internal and external pressure difference, and the opening operation is executed according to the internal and external pressure difference to realize the 'breathing' function, so that the pressure of the oil tank and the external environment is balanced according to the pressure change in the oil tank.
For example, the breathing valve is opened corresponding to the outlet, the design pressure mainly considers the upper pressure limit of the long-term sealing reliability of the oil tank and the lower temperature limit required by the low-temperature starting of the engine, and the sealing reliability under the design opening pressure is mainly considered; the 'sucking' function of the breather valve is opened corresponding to the inlet of the breather valve, the design pressure of the breather valve is as small as possible under the engineering realizable condition, and the design opening pressure is generally 5 kPa. Wherein, the 'breathing' and 'inhaling' functions of the breather valve are independent and do not interfere with each other.
When the environmental temperature rises, the fuel expands, the volume is increased, the volume of the gas inside the elastic bag is reduced and the pressure rises under the extrusion, when the internal and external pressure difference reaches the design pressure of the breathing valve 'breathing' function, the breathing valve exhausts to the external environment, the pressure in the elastic bag is reduced, the pressure in the oil tank is further reduced, and the damage to the oil tank structure caused by the pressure rise of the oil tank is avoided; when the ambient temperature is reduced, the fuel oil is contracted, the volume is reduced, the elastic bag is expanded, the volume of the gas in the elastic bag is increased, the pressure is reduced, when the internal and external pressure difference reaches the designed pressure value of the suction function of the breather valve, the breather valve sucks the gas from the external environment, the pressure in the elastic bag is increased, the pressure in the oil tank is further increased, the initial oil supply pressure is ensured, and the oil supply pressure of an engine starting section is ensured.
Through the technical scheme, the temperature compensation is carried out in the mode of combining the elastic bag and the breather valve, the reserved air cushion amount can be reduced to the greatest extent, and then the fuel filling ratio of the fuel system is improved (namely, the air cushion amount is reduced by combining the breather valve and the elastic bag, and the fuel filling ratio is improved). Compared with an oil tank with a full-sealing structure, the oil tank adopting the elastic bag and breather valve combined type fuel system temperature compensation device can reduce the air cushion amount by more than 35% (at normal temperature of 20 ℃), and the proportion of reducing the air cushion amount can be further improved along with further reduction of oil temperature during filling; moreover, the compensation device can balance the pressure of the oil tank and the external environment through the 'breathing' function of the breather valve, ensure the safety of the oil tank structure and simultaneously ensure the reliability of the low-temperature starting of the engine (namely, the breather valve is utilized to improve the initial pressure of the oil tank and ensure the initial oil supply pressure); meanwhile, the combined design can ensure oil-gas isolation, ensure that a working medium of the breather valve is gas and simultaneously avoid fuel oil from contacting air to be oxidized, and further ensure the storage, sealing and working reliability of the fuel oil system (namely, the elastic bag is utilized to carry out oil-gas isolation, prevent fuel oil from being oxidized and absorb water, ensure that the working medium of the breather valve is only gas, and greatly improve the storage, sealing and working reliability of the fuel oil system).
In the present invention, the space of the tank case 4 may be a relatively regular space to facilitate the contraction or expansion deformation of the elastic bag 1.
For example, the tank case 4 may be a cube, a rectangular parallelepiped, or a cylinder.
According to one embodiment of the invention, the flexible bag 1 is a bag body of flexible material.
That is, the elastic bag 1 can be a flexible bag body, has certain flexibility in the full temperature range of the fuel system, is compressed and sealed through a connecting piece, and is used for isolating fuel in the fuel tank from gas outside the fuel tank, ensuring that a working medium of the breather valve is only gas, and avoiding oxidation caused by contact of the fuel and the gas; and can contract or expand under pressure changes while ensuring oil and gas isolation.
The size of the containing cavity of the elastic bag 1 only considers that the volume expansion of the fuel system in the full temperature range does not exceed the volume of the fuel tank, and the pressure change caused by the air cushion quantity change is not considered.
According to one embodiment of the invention, the flexible material comprises rubber and tape.
For example, the elastic bag can be made by a method of rubber and rubberized fabric.
It should be understood by those skilled in the art that the above description of the materials is merely exemplary and not intended to limit the present invention, and any flexible material that can satisfy the flexibility after extreme low temperature rapid extrusion deformation, can ensure good strength and air tightness at-40 ℃ through low temperature operation and storage tests, can satisfy the compatibility of fuel during long-term storage, and can ensure sealing in the whole temperature range, and can satisfy the requirements of flexibility can be applied to the present invention.
According to one embodiment of the invention, the connecting element 3 is a flange.
According to one embodiment of the invention, the material of the flange is metal.
The embodiment of the invention also provides a fuel system, which comprises the temperature compensation device of the fuel system with the combination of the elastic bag and the breather valve.
The aircraft fuel system adopts an elastic bag and breather valve combined temperature compensation device, so that the air cushion amount can be effectively reduced, and the fuel filling ratio of an aircraft fuel tank is improved; the internal and external pressures of the oil tank are balanced, so that the oil tank is prevented from being damaged by high pressure, a certain initial pressure is ensured, and the initial oil supply pressure of an engine starting section is ensured; the oil-gas isolation design simplifies the design of the initial oil supply pressure scheme and improves the storage, sealing and working reliability of the fuel system.
Features that are described and/or illustrated above with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.
The above devices and methods of the present invention can be implemented by hardware, or can be implemented by hardware and software. The present invention relates to a computer-readable program which, when executed by a logic section, enables the logic section to realize the above-described apparatus or constituent section, or to realize the above-described various methods or steps. The present invention also relates to a storage medium such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like, for storing the above program.
The many features and advantages of these embodiments are apparent from the detailed specification, and thus, it is intended by the appended claims to cover all such features and advantages of these embodiments which fall within the true spirit and scope thereof. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the embodiments of the invention to the exact construction and operation illustrated and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope thereof.
The invention has not been described in detail and is in part known to those of skill in the art.
Claims (6)
1. A temperature compensation device of a fuel system combining an elastic bag and a breather valve is characterized in that, the device comprises an elastic bag (1), a breather valve (2) and a connecting piece (3), the elastic bag (1) is arranged in the oil tank shell (4) and used for carrying out oil-gas isolation on fuel oil in the oil tank shell (4), the breather valve (2) is arranged on the connecting piece (3), the connecting piece (3) and the oil tank shell (4) share the wall surface, the opening part of the elastic bag (1) is pressed and sealed with the oil tank shell (4) through the connecting piece (3), and the inlet of the breather valve (2) is positioned outside the oil tank shell (4) and is used for sucking the gas in the external environment into the elastic bag (1) when the breather valve is opened, the outlet of the breather valve (2) is positioned inside the elastic bag (1) and is used for exhaling the gas in the elastic bag (1) to the external environment when the breather valve is opened.
2. Device according to claim 1, characterized in that the elastic bag (1) is a bag of flexible material.
3. The device of claim 2, wherein the flexible material comprises rubber and tape.
4. A device according to any one of claims 1-3, characterized in that the connecting piece (3) is a flange.
5. The apparatus of claim 4, wherein the material of the flange is metal.
6. A fuel system comprising a flexible bag and breather combined fuel system temperature compensation device as claimed in any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537635.5A CN113184201A (en) | 2021-05-18 | 2021-05-18 | Elastic bag and breather valve combined fuel system temperature compensation device and fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110537635.5A CN113184201A (en) | 2021-05-18 | 2021-05-18 | Elastic bag and breather valve combined fuel system temperature compensation device and fuel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113184201A true CN113184201A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110537635.5A Pending CN113184201A (en) | 2021-05-18 | 2021-05-18 | Elastic bag and breather valve combined fuel system temperature compensation device and fuel system |
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| CN (1) | CN113184201A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061679A (en) * | 2021-11-10 | 2022-02-18 | 四川泛华航空仪表电器有限公司 | High-low temperature oil mass measuring device of intelligent sensor for aviation |
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|---|---|---|---|---|
| RU51588U1 (en) * | 2005-10-11 | 2006-02-27 | Открытое Акционерное Общество "Государственное Машиностроительное Конструкторское Бюро "Радуга" Имени А.Я.Березняка" | FUEL AIRCRAFT SYSTEM |
| CN103879946A (en) * | 2014-04-03 | 2014-06-25 | 北京星航机电装备有限公司 | Fuel injection method for oil tank with elastic bag |
| CN106218907A (en) * | 2016-07-29 | 2016-12-14 | 江西洪都航空工业集团有限责任公司 | A kind of flying object fuel tank and oil supply system |
| CN110683501A (en) * | 2019-09-30 | 2020-01-14 | 北京星航机电装备有限公司 | Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag |
-
2021
- 2021-05-18 CN CN202110537635.5A patent/CN113184201A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU51588U1 (en) * | 2005-10-11 | 2006-02-27 | Открытое Акционерное Общество "Государственное Машиностроительное Конструкторское Бюро "Радуга" Имени А.Я.Березняка" | FUEL AIRCRAFT SYSTEM |
| CN103879946A (en) * | 2014-04-03 | 2014-06-25 | 北京星航机电装备有限公司 | Fuel injection method for oil tank with elastic bag |
| CN106218907A (en) * | 2016-07-29 | 2016-12-14 | 江西洪都航空工业集团有限责任公司 | A kind of flying object fuel tank and oil supply system |
| CN110683501A (en) * | 2019-09-30 | 2020-01-14 | 北京星航机电装备有限公司 | Vacuum-pumping type fuel oil filling method for oil tank containing elastic bag |
Non-Patent Citations (2)
| Title |
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| 岳建祥: "天然气气封系统在原油储罐呼吸中的应用", 《石油工程建设》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061679A (en) * | 2021-11-10 | 2022-02-18 | 四川泛华航空仪表电器有限公司 | High-low temperature oil mass measuring device of intelligent sensor for aviation |
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Application publication date: 20210730 |