CN105626989A - Combined type fuel oil guide pipe connecting structure for aircraft - Google Patents
Combined type fuel oil guide pipe connecting structure for aircraft Download PDFInfo
- Publication number
- CN105626989A CN105626989A CN201410610645.7A CN201410610645A CN105626989A CN 105626989 A CN105626989 A CN 105626989A CN 201410610645 A CN201410610645 A CN 201410610645A CN 105626989 A CN105626989 A CN 105626989A
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- aircraft
- connecting structure
- sealing ring
- fuel oil
- pipeline
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Abstract
The invention belongs to an aircraft flight test field technology and particularly relates to a combined type fuel oil guide pipe connecting structure for an aircraft. The connecting structure is installed on a fuel oil system pipeline of the aircraft, reliable in pipeline connecting performance and easy and convenient to install. The combined type fuel oil guide pipe connecting structure comprises two pipe sleeves 1, two retaining rings 2, two nuts 3, an outer sleeve 4 and two sealing rings 5. An aircraft pipeline system is an important part for conveying fluid for the aircraft, a guide pipe connecting structure piece is an important standard piece for aircraft pipeline connection, and the using performance, the service life and the reliability of a fuel oil system, a hydraulic system, an environment control system and other systems of the aircraft are directly affected by the performance of the pipeline system connecting structure. Therefore, the pipeline connecting structure plays a vital role in the performance and the safe reliability of the aircraft.
Description
Technical field
The invention belongs to aviation flight test art, particularly relate to the design of a kind of aircraft fuel oil conduit attachment structure, this attachment structure is installed aboard on fuel system pipeline, is that a kind of pipeline switching performance is reliable, easy-to-install product.
Background technology
Aircraft pipe-line system is the vitals of aircraft conveyance fluid, conduit connection member is the major criterion part that connects of aircraft pipeline and the performance quality of pipe-line system attachment structure directly affects the serviceability of system, the life and reliabilities such as aircraft fuel oil, hydraulic pressure, ring control. Therefore performance and the security reliability of aircraft are played vital effect by pipeline jointing construction.
The connection of current aircraft fuel system conduit is generally adopted and is rigidly connected and flexibly connects, and is rigidly connected and is generally adopted the connection of flared type combined catheter or Flange joint. Being rigidly connected and do not allow connecting line relative displacement and corner occur, being simultaneously connected with position to have enough working places; Flexibly connecting on the fuel pipe of aircraft at home major part adopts HB6521 conduit to connect Quick Release Hoop, owing to the reason such as conduit Concentricity tolerance of clamp connection causes erection stress, makes band the phenomenons such as fracture occur.
Summary of the invention
It is an object of the invention to: a set of combination gas oil-piping layout attachment structure is provided, have that manufacturing process is simple, easy to connect, tight firmly, the feature of dependable performance, to overcome the deficiency of existing fuel duct attachment structure.
The present invention is realized by following technical scheme: this composite aircraft fuel duct attachment structure includes 1, two back-up rings of two pipe boxes, 3,1 outer sleeve 4 of 2, two nuts and two sealing rings 5. The installation steps of the present invention are as follows:
Step 1, needing one end welding socket 1 of two conduits of connecting respectively, the touchstone after welding socket 1 press navigation mark HB5135 structural steel and rustless steel joint made by flame welding quality inspection and navigation mark HB5375 aluminum and the execution of aluminium alloy fusion welding quality touchstone;
Step 2, rectangular groove on pipe box 1 install sealing ring 5, in order to the sealing of fuel piping system; The surface roughness of the rectangular groove structure on pipe box 1 is not less than Ra1.6, the passed ingress edge of sealing ring 5 needs polishing, polishing. Simultaneously sealing ring need to according to working media, use temperature range to choose the material of sealing ring, sealing ring d is generally between 1.5 8.0;
Step 3, being arranged in nut 3 with Circlip tongs by back-up ring 2, this back-up ring 2 is circlip for hole, and its external diameter is slightly less than nut 3 internal diameter, it is simple to prevent from connecting the axially-movable of assembly. It is completed back nut 3 and is sleeved on two conduits needing to connect;
Step 4, finally utilize outer sleeve 4 complete need connect two conduits to dress.
The invention have the advantage that 1) fuel duct attachment structure has simple in construction, lightweight, reduce installation instrument, be easy for installation and removal, utilize maintenance, installation maintenance time can be shortened, reduce the requirement to installation environment; And HB6521 conduit connect Quick Release Hoop be made up of cassette tape, bolt, nut, lining etc., structure complexity, Heavy Weight, installation inconvenience etc. shortcoming.
2) sealing principle of this attachment structure is to utilize the interior pressure between medium and sealing ring of pipe by seal for pipe joints, structure allows interconnective pipeline generation microdisplacement or corner, thus reducing the pipe stress destruction to structural member, solving inevitably tiltedly inclined when aircraft low pressure pipe system such as fuel duct connects and being subjected to displacement problem.
1 one kinds of aircraft fuel oil conduit attachment structure appearance schematic diagram of description of drawings.
Fig. 2 one aircraft fuel oil conduit attachment structure generalized section
Detailed description of the invention
Below this aircraft fuel oil conduit attachment structure is described in further details. Referring to Fig. 1, this composite aircraft fuel duct attachment structure includes 1, two back-up rings of two pipe boxes, 3,1 outer sleeve 4 of 2, two nuts and two sealing rings 5, outer sleeve 4 complete two connection conduits to dress. Installation steps are as follows:
Step 1, needing one end welding socket 1 of two conduits of connecting respectively, the touchstone after welding socket 1 press navigation mark HB5135 structural steel and rustless steel joint made by flame welding quality inspection and navigation mark HB5375 aluminum and the execution of aluminium alloy fusion welding quality touchstone;
Step 2, rectangular groove on pipe box 1 install sealing ring 5, in order to the sealing of fuel piping system; The surface roughness of the rectangular groove structure on pipe box 1 is not less than Ra1.6, the passed ingress edge of sealing ring 5 needs polishing, polishing. Simultaneously sealing ring need to according to working media, use temperature range to choose the material of sealing ring, sealing ring d is generally between 1.5 8.0;
Step 3, being arranged in nut 3 with Circlip tongs by back-up ring 2, this back-up ring 2 is circlip for hole, and its external diameter is slightly less than nut 3 internal diameter, it is simple to prevent from connecting the axially-movable of assembly. It is completed back nut 3 and is sleeved on two conduits needing to connect;
Step 4, finally utilize outer sleeve 4 complete two connection conduits to dress.
This aircraft fuel oil conduit attachment structure use time note following some:
1, before fuel duct connects, outside bush whorl and sealing ring are coated with satisfactory 7257 greases;
2, during assembling, sealing ring does not allow distortion;
3, after tightening, connect conduit and should carry out leak check;
4, this attachment structure allows the axial maximum removable length of conduit to be about 12mm;
5, this attachment structure allows the radial displacement of the two conduit axis connected to be not more than 0.5mm.
Claims (3)
1. a composite aircraft fuel duct attachment structure, including two pipe boxes (1), two back-up rings (2), two nuts (3), 1 outer sleeve (4) and two sealing rings (5); It is characterized in that: need one end welding socket (1) of two conduits connected; Rectangular groove on pipe box (1) installs sealing ring (5); The surface roughness of the rectangular groove structure on pipe box (1) is not less than Ra1.6, and the passed ingress edge of sealing ring (5) needs polishing, polishing; Back-up ring (2) is arranged in nut (3), and this back-up ring (2) is circlip for hole, and its external diameter is slightly less than nut (3) internal diameter; Nut (3) after being completed is sleeved on two conduits needing to connect; Outer sleeve (4) realize need connect two conduits to dress.
2. composite aircraft fuel duct attachment structure as claimed in claim 1, it is characterised in that: the touchstone after welding socket (1) is pressed navigation mark HB5135 " structural steel and rustless steel joint made by flame welding quality inspection " and navigation mark HB5375 " aluminum and the inspection of aluminium alloy fusion welding quality " standard and is performed.
3. composite aircraft fuel duct attachment structure as claimed in claim 1, it is characterized in that: simultaneously sealing ring (5) need to according to working media, use temperature range to choose the material of sealing ring (5), the diameter of sealing ring (5) is generally between 1.5 8.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610645.7A CN105626989A (en) | 2014-11-03 | 2014-11-03 | Combined type fuel oil guide pipe connecting structure for aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410610645.7A CN105626989A (en) | 2014-11-03 | 2014-11-03 | Combined type fuel oil guide pipe connecting structure for aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105626989A true CN105626989A (en) | 2016-06-01 |
Family
ID=56042182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410610645.7A Pending CN105626989A (en) | 2014-11-03 | 2014-11-03 | Combined type fuel oil guide pipe connecting structure for aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105626989A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503274A (en) * | 2020-11-26 | 2021-03-16 | 中国商用飞机有限责任公司 | Pipeline for aircraft fuel system and pipeline system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545565A (en) * | 1983-12-08 | 1985-10-08 | Asahi Yukizai Kogyo Co., Ltd. | Diaphragm valve |
| DE4126708A1 (en) * | 1991-08-13 | 1993-02-25 | Weinhold Karl | Plastics or plastics coated pipe coupling - has cage forming groove to hold even rigid inflexible sealing rings |
| DE4136220A1 (en) * | 1991-11-02 | 1993-05-06 | Karl Dipl.-Ing. 4040 Neuss De Weinhold | Socketed pipe coupling - has rubber sealing ring with external peripheral groove accommodating ring of harder material |
| CN2428672Y (en) * | 2000-05-19 | 2001-05-02 | 诸暨市凌宇管件有限公司 | Large-diameter pipe adaptor |
| CN201190854Y (en) * | 2008-02-15 | 2009-02-04 | 杨长国 | Plastic-aluminum pipe connection |
| CN201731204U (en) * | 2009-04-23 | 2011-02-02 | 贵州航天精工制造有限公司 | Oil pipe assembly for being connected with fuel oil server of aircraft engine |
| CN102102785A (en) * | 2011-02-15 | 2011-06-22 | 中国航空工业集团公司西安飞机设计研究所 | Flexible joint leakage oil collecting device for plane fuel duct |
-
2014
- 2014-11-03 CN CN201410610645.7A patent/CN105626989A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4545565A (en) * | 1983-12-08 | 1985-10-08 | Asahi Yukizai Kogyo Co., Ltd. | Diaphragm valve |
| DE4126708A1 (en) * | 1991-08-13 | 1993-02-25 | Weinhold Karl | Plastics or plastics coated pipe coupling - has cage forming groove to hold even rigid inflexible sealing rings |
| DE4136220A1 (en) * | 1991-11-02 | 1993-05-06 | Karl Dipl.-Ing. 4040 Neuss De Weinhold | Socketed pipe coupling - has rubber sealing ring with external peripheral groove accommodating ring of harder material |
| CN2428672Y (en) * | 2000-05-19 | 2001-05-02 | 诸暨市凌宇管件有限公司 | Large-diameter pipe adaptor |
| CN201190854Y (en) * | 2008-02-15 | 2009-02-04 | 杨长国 | Plastic-aluminum pipe connection |
| CN201731204U (en) * | 2009-04-23 | 2011-02-02 | 贵州航天精工制造有限公司 | Oil pipe assembly for being connected with fuel oil server of aircraft engine |
| CN102102785A (en) * | 2011-02-15 | 2011-06-22 | 中国航空工业集团公司西安飞机设计研究所 | Flexible joint leakage oil collecting device for plane fuel duct |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503274A (en) * | 2020-11-26 | 2021-03-16 | 中国商用飞机有限责任公司 | Pipeline for aircraft fuel system and pipeline system |
| CN112503274B (en) * | 2020-11-26 | 2022-02-01 | 中国商用飞机有限责任公司 | Pipeline for aircraft fuel system and pipeline system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160601 |
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| RJ01 | Rejection of invention patent application after publication |