CN109466739B - Airplane large-load open-section pull rod structure and using method thereof - Google Patents
Airplane large-load open-section pull rod structure and using method thereof Download PDFInfo
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- CN109466739B CN109466739B CN201811305732.6A CN201811305732A CN109466739B CN 109466739 B CN109466739 B CN 109466739B CN 201811305732 A CN201811305732 A CN 201811305732A CN 109466739 B CN109466739 B CN 109466739B
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- pull rod
- reinforcing ribs
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- airplane
- rod structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The large-load section-opening pull rod structure of the airplane is characterized in that the reinforcing ribs are perpendicular to the left side face and the right side face, the reinforcing ribs and the web plate are in a non-perpendicular relation, and the reinforcing ribs are parallel to each other.
Description
Technical Field
The invention belongs to the design technology of airplane structures, and further relates to a waterproof design of an airplane large-load pull rod, in particular to an airplane large-load open-section pull rod structure.
Background
The pull rod is a typical structure in an airplane body, and has the advantages of direct force transmission, simple structure type, high structure efficiency and the like. The section forms of the pull rod are various, and the common section forms are an I-shaped section and a round section, which have the characteristics respectively. The I-shaped pull rod is more commonly adopted due to the open section form, simple forming, low processing cost and easy realization of the integrated design of the pull rod and the joints at the two ends. The longitudinal elements of the I-shaped pull rod are all thin-walled structures, and in order to improve the local critical instability stress of the pull rod, a plurality of reinforcing ribs need to be transversely arranged on the pull rod for improving the overall bearing capacity of the pull rod. And the existence of horizontal strengthening rib causes the local ponding of pull rod easily, leads to the corrosion problem. At present, for the drainage problem of a large-load open-section pull rod structure at home and abroad, drainage holes are generally formed at the root parts of transverse studs of a pull rod web surface for drainage, or the drainage prevention design is carried out by adopting modes such as foam filling and the like. However, for the tie rod with large load (generally, the axial load is more than 10 tons), stress concentration can be formed around the drain hole with small diameter, and fatigue damage can be caused after long-term use, thus endangering the structural safety. And the foam filling is adopted, so that the working procedures are increased, the requirement on filling gaps is high, and the phenomena of loose filling, liquid infiltration and corrosion occur.
Disclosure of Invention
The invention provides a novel airplane large-load open-section pull rod structure capable of effectively preventing water and not damaging the pull rod structure and a using method, aiming at the problem that the existing large-load open-section pull rod structure has water accumulation.
The utility model provides an aircraft heavy load is opened section pull rod structure, the pull rod contains left surface, right flank and web and constitutes the section and be the I-shaped structure, is equipped with a plurality of strengthening ribs in the groove that left surface, right flank and web formed, its characterized in that, strengthening rib perpendicular to left surface and right flank, be non-vertical relation between strengthening rib and the web, be parallel to each other between each strengthening rib.
When the large-load open-section pull rod structure of the airplane is used, one end of the pull rod is fixed on a higher fixed point, and the other end of the pull rod is fixed on a lower fixed point.
Compared with the design of the traditional pull rod, the invention has the following advantages: the method is characterized in that the reinforcing rib on the side, where liquid possibly accumulates, of the large-load open-section pull rod is not designed in the direction perpendicular to the axis of the pull rod any more, but the free end of the reinforcing rib is lower than one end of the connecting root of the reinforcing rib and the web plate, and chamfering is carried out on the joint root at one end of the pull rod with a lower fixed point, so that the liquid is ensured not to accumulate, the problem of stress concentration of the structure caused by the arrangement of the drain hole is solved, and the method is a safe and effective drainage mode.
The present application is described in further detail below with reference to the accompanying drawings of embodiments.
Drawings
FIG. 1 is a schematic view of a high-load open-section tie rod structure of an aircraft.
Fig. 2 is a schematic view of the use state of the airplane high-load open-section pull rod.
Fig. 3 is an enlarged schematic view of a portion I in fig. 2.
Fig. 4 is an enlarged schematic view of a part II in fig. 2.
The numbering in the figures illustrates: 1 left side, 2 right sides, 3 webs, 4 reinforcing ribs, 5 reinforcing rib free ends, 6 reinforcing rib roots, 7 inclined planes, 8 higher fixing points and 9 lower fixing points.
Detailed Description
The large-load open-section pull rod structure is shown in the attached drawing, connecting holes for fixing are arranged at two ends of the pull rod, and a rod body of the pull rod is of an I-shaped section and is of an integrally formed structure. The left side surface 1 and the right side surface 2 and the web form a groove-shaped structure. In the inslot that left surface 1, right flank 2, web 3 formed, according to the concrete length and the requirement of bearing of pull rod, along pull rod axis direction design certain quantity of strengthening rib 4, strengthening rib perpendicular to left surface 1 and right flank 2, one of the key point of this application lies in the easy one side inslot that produces ponding of pull rod, requires that the contained angle between this strengthening rib 4 and the web 3 is the non-vertical relation to be parallel to each other between each strengthening rib. When the pull rod is installed and used, one end of the pull rod is fixed on the higher fixing point 8, and the other end of the pull rod is fixed on the lower fixing point 9. Note that the root 6 connecting the stiffener 4 to the web is closer to the end of the anchor 8 which is higher than the tie rod, and the free end 5 of the stiffener is closer to the end of the anchor 8 which is lower than the tie rod. The bar free ends 5 are below the root 6 where the bar is connected to the web and below the horizontal plane. Another key point of the present application is that the inner end of the groove at the lower fixed point end of the pull rod is designed into a bevel 7. The inclined surface 7 is parallel to the reinforcing bar 4. Therefore, when liquid leaks into the groove of the pull rod, the liquid cannot accumulate at the root part 6 of the reinforcing rib of the pull rod and the root part of the joint at one end of the lower fixed point of the pull rod, and flows downwards in a stepped mode along the axial direction of the pull rod and finally flows out of the pull rod, so that the water-proof and drainage problem of the open-section pull rod is effectively solved.
Claims (1)
1. A method for using a large-load profile-opening pull rod structure of an airplane is characterized in that the pull rod comprises a left side surface, a right side surface and a web plate, a profile is of an I-shaped structure, a plurality of reinforcing ribs are arranged in grooves formed by the left side surface, the right side surface and the web plate, the reinforcing ribs are perpendicular to the left side surface and the right side surface, the reinforcing ribs and the web plate are in a non-perpendicular relation, the reinforcing ribs are parallel to each other, one end of the pull rod is fixed on a higher fixed point during use, the other end of the pull rod is fixed on a lower fixed point, the root of the connection of the reinforcing ribs and the web plate is closer to the higher fixed point of the pull rod, and the free ends of the reinforcing ribs are closer to the lower fixed point of the pull rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305732.6A CN109466739B (en) | 2018-11-02 | 2018-11-02 | Airplane large-load open-section pull rod structure and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305732.6A CN109466739B (en) | 2018-11-02 | 2018-11-02 | Airplane large-load open-section pull rod structure and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109466739A CN109466739A (en) | 2019-03-15 |
| CN109466739B true CN109466739B (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811305732.6A Active CN109466739B (en) | 2018-11-02 | 2018-11-02 | Airplane large-load open-section pull rod structure and using method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019059A (en) * | 2018-01-30 | 2018-05-11 | 中冶建工集团有限公司 | A kind of pedal of step |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202796U (en) * | 1985-07-05 | 1986-05-28 | 王兴仁 | Multi-functional gauge |
| CN2094424U (en) * | 1990-12-23 | 1992-01-29 | 姜健民 | Rapid adjusting moveable spanner |
| US5833786A (en) * | 1996-05-16 | 1998-11-10 | The Boeing Company | Titanium radius filler for use in composite interfaces |
| CN203891255U (en) * | 2013-12-25 | 2014-10-22 | 潘旭鹏 | Industrial factory building external wall |
| US10513101B2 (en) * | 2015-03-13 | 2019-12-24 | The Boeing Company | Apparatuses and methods for creating layered tape composite structures |
| CN204715726U (en) * | 2015-05-12 | 2015-10-21 | 江苏博林机械制造有限公司 | A kind of anti-ponding steel springboard with draw bail |
| CN106828532A (en) * | 2016-12-29 | 2017-06-13 | 株洲时代新材料科技股份有限公司 | City rail vehicle lightweight drawing pull bar |
| CN106809371A (en) * | 2017-02-21 | 2017-06-09 | 江苏恒神股份有限公司 | Full carbon fiber monaural joint, its forming technology and shaping dies |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108019059A (en) * | 2018-01-30 | 2018-05-11 | 中冶建工集团有限公司 | A kind of pedal of step |
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| CN109466739A (en) | 2019-03-15 |
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