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CN109533357A - A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash - Google Patents

A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash Download PDF

Info

Publication number
CN109533357A
CN109533357A CN201811354772.XA CN201811354772A CN109533357A CN 109533357 A CN109533357 A CN 109533357A CN 201811354772 A CN201811354772 A CN 201811354772A CN 109533357 A CN109533357 A CN 109533357A
Authority
CN
China
Prior art keywords
sealing
easily broken
fuel tank
crash
inner tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811354772.XA
Other languages
Chinese (zh)
Inventor
赵辉
李允伟
张驰
戴礼军
胡招财
杨勇志
谢增
王庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Helicopter Research and Development Institute
Original Assignee
China Helicopter Research and Development Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Helicopter Research and Development Institute filed Critical China Helicopter Research and Development Institute
Priority to CN201811354772.XA priority Critical patent/CN109533357A/en
Publication of CN109533357A publication Critical patent/CN109533357A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00Arrangements in connection with fuel supply for power plant
    • B64D37/02Tanks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D37/00Arrangements in connection with fuel supply for power plant
    • B64D37/02Tanks
    • B64D37/06Constructional adaptations thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D45/00Aircraft indicators or protectors not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

This application provides a kind of easily broken self-sealing joints for helicopter fuel tank anti-crash, it belongs to helicopter fuel system field, in easily broken self-sealing joint inner and outer tubes by with connect sleeve and vulcanize to form one, safety axis opens inside and outside sealing active door, guarantees the unimpeded of oil circuit when working normally.When helicopter crashes, connection sleeve breakage, inside insure axle fracture or fall off, and under the action of two springs, inside and outside sealing active door is closed with inner and outer pipe respectively, closing pipe line, prevent fuel oil from overflowing and firing.The easily broken self-sealing joint structure of the application is simple, small in size, easy processing, and reliable operation, suitable between fuel tank or the connection of fuel tank and pipeline.

Description

A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash
Technical field
The application belongs to helicopter fuel system field, in particular to a kind of for the easily broken of helicopter fuel tank anti-crash Self-sealing joint.
Background technique
Helicopter fuel tank is generally positioned at the abdomen of helicopter, helicopter crash during, in order to prevent fuel oil from It is flowed out in helicopter fuel tank, a kind of connector is needed, to realize above-mentioned function.
Summary of the invention
There is provided a kind of easily broken self-sealing joints for helicopter fuel tank anti-crash for the purpose of the application, on solving State any problem.
The technical solution of the application is: a kind of easily broken self-sealing joint for helicopter fuel tank anti-crash, described easily broken Self-sealing joint includes: inner tube, and said inner tube is connect with fuel tank, wherein has interior pipe support in said inner tube;Outer tube, it is described Outer tube is connect with fuel pipe, wherein has outer pipe support in the outer tube;Sleeve is connected, described in the connection sleeve connection Inner and outer tubes, for keeping said inner tube and outer tube relatively fixed;Interior sealing active door and connecting shaft, the interior sealing active door pass through The connecting shaft is slidably arranged on outside interior pipe support, and the interior sealing active door is used to cooperate with said inner tube described to seal Inner tube;External seal valve, the external seal valve are slidably arranged on outer pipe support, and the external seal valve is used for and institute Outer tube cooperation is stated to seal the outer tube;Safety axis, the safety axis be connected to the connecting shaft and the external seal valve it Between, in the non-state that fractures supports sealing active door and external seal valve be sealing state;And first spring and the second bullet Spring, first spring are set between said inner tube support and the connecting shaft, are used to provide the described interior sealing active door and institute Power needed for stating the interior seal of tube, the second spring is set between the outer pipe support and the external seal valve, for mentioning For power needed for the external seal valve and the outer seal of tube.
In one embodiment of the application, the connection sleeve is using flexible easily broken material production.
In one embodiment of the application, the easily broken material of flexibility includes rubber.
In one embodiment of the application, the connection sleeve keeps said inner tube, outer tube integrally formed by vulcanization.
In one embodiment of the application, the interior sealing active door has one first conical seal (contact) face, and said inner tube has The sealing surface to match with first conical seal (contact) face.
In one embodiment of the application, second sealing have one second conical seal (contact) face, the outer tube have with The sealing surface that second conical seal (contact) face matches.
In one embodiment of the application, the primary sealing area is oppositely arranged with the secondary sealing area.
In one embodiment of the application, first spring is compressed spring;The second spring is compressed spring.
In one embodiment of the application, said inner tube support is coaxially arranged with the outer pipe support.
In one embodiment of the application, the safety axis includes the first tapered portion that small end is oppositely arranged and the second cone Shape portion, first tapered portion and second tapered portion form the guiding groove for guiding the insurance axle fracture.
In the easily broken self-sealing joint of the application inner and outer tubes by with connect sleeve and vulcanize to form one, safety axis opens Inside and outside sealing active door, oil circuit is unimpeded when guarantee works normally.When helicopter crashes, connection sleeve breakage, internal safety axis It is broken or falls off, under the action of two springs, inside and outside sealing active door is closed with inner and outer pipe respectively, and closing pipe line prevents fuel oil It overflows and fires.The easily broken self-sealing joint structure of the application is simple, small in size, easy processing, and reliable operation, be suitable for fuel tank it Between or fuel tank and pipeline connection.
Detailed description of the invention
In order to illustrate more clearly of technical solution provided by the present application, attached drawing will be briefly described below.It is aobvious and easy Insight, drawings discussed below are only some embodiments of the present application.
Fig. 1 is the easily broken self-sealing joint the schematic diagram of the section structure of the application.
Appended drawing reference:
1- inner tube, pipe support in 11-;
2- outer tube, the outer pipe support of 21-;
3- connection sleeve;
4- connecting shaft, 41- step;
Sealing active door in 5-, the first conical seal (contact) face of 51-;
The first spring of 6--
7- external seal valve, the second conical seal (contact) face of 71-
8- second spring;
9- safety axis, the first tapered portion of 91-, the second tapered portion of 92-.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application implementation clearer, below in conjunction in the embodiment of the present application Attached drawing, technical solutions in the embodiments of the present application is further described in more detail.
In the description of the present application, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom", "inner", "outside" is that orientation based on the figure or position are closed System is merely for convenience of description the application and simplifies description, rather than the device or element of indication or suggestion meaning must have Specific orientation is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application protection scope.
In order to solve in the prior art, helicopter crash after fuel tank draining problem, this application provides one kind for straight The easily broken self-sealing joint of machine fuel tank anti-crash is risen, fuel leakage can be prevented after helicopter crash.
The easily broken self-sealing joint for helicopter fuel tank anti-crash of the application mainly includes inner tube 1, outer tube 2, connection Sleeve 3, interior sealing active door 5 and connecting shaft 6, external seal valve 7, safety axis 9, the first spring 6 and second spring 8.Inner tube 1 and combustion Fuel tank connection, outer tube 2 are connect with fuel pipe.There is interior pipe support 11 inside inner tube 1, there is outer pipe support inside outer tube 2 21.It connects sleeve 3 and connects inner tube 1 and outer tube 2, keep inner tube 1 and outer tube 2 relatively fixed.Interior sealing active door 5 can by connecting shaft 6 The outside (outside inner tube 1) for being set to interior pipe support 11 of sliding, interior sealing active door 5 can cooperate with inner tube 1 to realize sealing Inner tube 1.External seal valve 7 is slidably arranged on outer pipe support 21 (inside outer tube 2), and external seal valve 7 can be with outer tube 2 Cooperation is to realize sealed outer pipe 2.Safety axis 9 is connected between connecting shaft 6 and external seal valve 7, can be in the non-state branch that fractures Sealing active door 5 makes interior sealing active door 5 in supportting and inner tube 1 is non-tight state, and support external seal valve 7 keeps external seal living Door 7 is non-tight state with outer tube 2.First spring 6 is set between interior pipe support 11 and connecting shaft 6, can be in safety axis 9 Sealing active door 5 and inner tube 1 seal required power in providing under the state that fractures, second spring 8 be set to outer pipe support 21 with it is outer close It seals between valve 7, external seal valve 7 can be equally provided in the case where safety axis 9 is the state that fractures and outer tube 21 seals required power.
The easily broken self-sealing joint of the application passes through the bending part of connection sleeve 3 and fuel tank bulkhead sulphur shown in Fig. 1 Change together, the inner tube 1 of easily broken self-sealing joint left part is inserted into fuel tank, and the outer tube 2 and external pipeline of right part connect It connects.
When easily broken self-sealing joint is completed to install, safety axis 9 opens connecting shaft 4 and external seal valve 7,4 He of the first spring Second spring 8 is in compressive state, and interior sealing active door 5, external seal valve 7 are in the open state.
In normal use, safety axis 9 opens the connecting shaft 4 and external seal valve 7 of two sides, the first spring 4 and the second bullet Spring 8 is in compressive state, and interior sealing active door 5 and external seal valve 7 are in the open state, and fuel oil can be by flowing to fuel oil in fuel tank Outside case, as shown by arrows in figure, oil circuit is unimpeded, guarantees use under normal circumstances.
When helicopter crashes, fuel tank moves downward generation deformation, and tears easily broken self-sealing joint, but due to connector sleeve The effect of contraction of cylinder, easily broken self-sealing joint only has small rotation, and connects sleeve 3, inner tube 1,2 three contact point of outer tube Stress is concentrated.
In the progress fallen with helicopter, connects sleeve 3 and bear the stress incessantly concentrated and be broken, and safety axis 9 also can be broken or fall off, interior sealing active door 5 and outer close under driving under the action of the first spring 4 and second spring 8 at this time Its corresponding pipeline of valve 7 closure is sealed, sealing process is played.
After helicopter crash, inside and outside valve is all closed, and oil circuit good seal, fuel oil can not leak.
In one embodiment of the application, connection sleeve 3 is using flexible easily broken material production.For example, flexible easily broken material It can be rubber material.Connection sleeve 3 can be such that inner tube 1, outer tube 2 is formed as one using vulcanization.
In one embodiment of the application, the left side of interior sealing active door 5 has one first conical seal (contact) face 51, inner tube 1 Right side has the sealing surface to match with the first conical seal (contact) face 51.Likewise, the right side of the second sealing 7 has one second Conical seal (contact) face 71, the left side inside outer tube 2 have the sealing surface to match with the second conical seal (contact) face 71.It is close using tapered surface The mode of envelope, can be improved sealing intensity.
In the above-described embodiments, primary sealing area 51 and the direction of secondary sealing area 71 are reversed.Likewise, first is close Cover 51 is with secondary sealing area 71 towards identical setting, i.e., secondary sealing area 71 is also towards left side, in the case, outer pipe support 21 may be disposed at the left side of outer tube 2, and outer pipe support 21 structure and realizes second seal 7 then in by under spring elongation state Motion mode can refer at interior pipe support 11, only spring state becomes tensional state from compressive state, this place repeats no more.
In the above-described embodiments, the first spring 6 is compressed spring;Second spring 8 is compressed spring.And in its another implementation In example, then the first spring 6 is compressed spring;Second spring 8 is extension spring
In one embodiment of the application, interior pipe support 11 can be coaxially arranged with outer pipe support 21, guarantee the transmitting of power.
In one embodiment of the application, safety axis 9 includes the first tapered portion 91 and the second taper that small end is oppositely arranged Portion 92, the first tapered portion 91 and the second tapered portion 92 form the guiding groove for guiding safety axis 9 to be broken.
In the easily broken self-sealing joint of the application inner and outer tubes by with connect sleeve and vulcanize to form one, safety axis opens Inside and outside sealing active door, oil circuit is unimpeded when guarantee works normally.When helicopter crashes, connection sleeve breakage, internal safety axis It is broken or falls off, under the action of two springs, inside and outside sealing active door is closed with inner and outer pipe respectively, and closing pipe line prevents fuel oil It overflows and fires.The easily broken self-sealing joint structure of the application is simple, small in size, easy processing, and reliable operation, be suitable for fuel tank it Between or fuel tank and pipeline connection.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Within the technical scope of the present application, any changes or substitutions that can be easily thought of by those familiar with the art, all answers Cover within the scope of protection of this application.Therefore, the protection scope of the application should be with the scope of protection of the claims It is quasi-.

Claims (10)

1. a kind of easily broken self-sealing joint for helicopter fuel tank anti-crash, which is characterized in that the easily broken self-sealing joint packet It includes:
Inner tube (1), said inner tube (1) are connect with fuel tank, wherein have interior pipe support (11) in said inner tube (1);
Outer tube (2), the outer tube (2) connect with fuel pipe, wherein have outer pipe support (21) in the outer tube (2);
It connects sleeve (3), the connection sleeve (3) connection said inner tube (1) and outer tube (2), for making said inner tube (1) and outside It is relatively fixed to manage (2);
Interior sealing active door (5) and connecting shaft (6), the interior sealing active door (5) are slidably arranged on by the connecting shaft (6) Outside, the interior sealing active door (5) is used to cooperate with said inner tube (1) to seal said inner tube (1) interior pipe support (11);
External seal valve (7), the external seal valve (7) are slidably arranged on outer pipe support (21), and the external seal is living Door (7) is used to cooperate with the outer tube (2) to seal the outer tube (2);
Safety axis (9), the safety axis (9) are connected between the connecting shaft (6) and the external seal valve (7), are used for The non-state that fractures supports interior sealing active door (5) and external seal valve (7) are sealing state;And
First spring (6) and second spring (8), first spring (6) are set to said inner tube support (11) and the connection Between axis (6), power needed for being used to provide the described interior sealing active door (5) and said inner tube (1) sealing, the second spring (8) Be set between the outer pipe support (21) and the external seal valve (7), be used to provide the described external seal valve (7) with it is described Power needed for outer tube (21) sealing.
2. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as described in claim 1, which is characterized in that the company Female connector cylinder (3) is using flexible easily broken material production.
3. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as claimed in claim 2, which is characterized in that described soft The easily broken material of property includes rubber.
4. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as claimed in claim 3, which is characterized in that the company Female connector cylinder (3) keeps said inner tube (1), outer tube (2) integrally formed by vulcanization.
5. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as described in claim 1, which is characterized in that in described Sealing active door (5) has one first conical seal (contact) face (51), and said inner tube (1) has and the first conical seal (contact) face (51) phase Matched sealing surface.
6. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as described in claim 1, which is characterized in that described the Two sealings (7) have one second conical seal (contact) face (71), and the outer tube (2) has and the second conical seal (contact) face (71) phase The sealing surface matched.
7. such as the easily broken self-sealing joint described in claim 5 or 6 for helicopter fuel tank anti-crash, which is characterized in that institute Primary sealing area (51) is stated to be oppositely arranged with the secondary sealing area (71).
8. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as claimed in claim 7, which is characterized in that described the One spring (6) is compressed spring;The second spring (8) is compressed spring.
9. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as described in claim 1, which is characterized in that in described Pipe support (11) is coaxially arranged with the outer pipe support (21).
10. being used for the easily broken self-sealing joint of helicopter fuel tank anti-crash as described in claim 1, which is characterized in that described Safety axis (9) includes the first tapered portion (91) and the second tapered portion (92) that small end is oppositely arranged, first tapered portion (91) guiding groove for guiding the safety axis (9) to be broken is formed with second tapered portion (92).
CN201811354772.XA 2018-11-14 2018-11-14 A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash Pending CN109533357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811354772.XA CN109533357A (en) 2018-11-14 2018-11-14 A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811354772.XA CN109533357A (en) 2018-11-14 2018-11-14 A kind of easily broken self-sealing joint for helicopter fuel tank anti-crash

Publications (1)

Publication Number Publication Date
CN109533357A true CN109533357A (en) 2019-03-29

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ID=65847306

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112208780A (en) * 2020-10-23 2021-01-12 宜宾三江机械有限责任公司 Double-sealing quick-release self-sealing valve
CN113978742A (en) * 2021-10-25 2022-01-28 中航通飞华南飞机工业有限公司 Refueling system, water refueling aircraft and refueling method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112208780A (en) * 2020-10-23 2021-01-12 宜宾三江机械有限责任公司 Double-sealing quick-release self-sealing valve
CN113978742A (en) * 2021-10-25 2022-01-28 中航通飞华南飞机工业有限公司 Refueling system, water refueling aircraft and refueling method

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Application publication date: 20190329