CN203285899U - Variable oilhole structure of undercarriage buffer - Google Patents
Variable oilhole structure of undercarriage buffer Download PDFInfo
- Publication number
- CN203285899U CN203285899U CN2013203047617U CN201320304761U CN203285899U CN 203285899 U CN203285899 U CN 203285899U CN 2013203047617 U CN2013203047617 U CN 2013203047617U CN 201320304761 U CN201320304761 U CN 201320304761U CN 203285899 U CN203285899 U CN 203285899U
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- Prior art keywords
- oilhole
- variable
- valve
- oil hole
- undercarriage buffer
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Abstract
The utility model relates to a variable oilhole structure of an undercarriage buffer, belonging to the field of aviation and aiming at providing an oilhole variation structure which can well control the shape and the area of a variable oilhole under the condition that weight is not increased. The varied oilhole structure of the undercarriage buffer comprises a valve, an oil needle and a check ring and also comprises invariable oilholes and the variable oilhole, wherein the invariable oilholes are formed in the valve; the variable oilhole is formed between the section of the oil needle and the check ring. Compared with the prior art, the variable oilhole structure of the undercarriage buffer has the following advantages that the variable oilhole structure is realized by combination of the invariable oilholes formed in the valve, the check ring and the section of the oil needle, and well controls the shape and the area of the variable oilhole under the condition that weight is not increased.
Description
Technical field
The utility model relates to a kind of change oil hole structure of undercarriage buffer, belongs to aviation field.
Background technique
Buffer is the important component part of undercarriage, is mainly used in absorbing aircraft landing and slides kinetic energy in process.The oil-gas buffer of generally applying on present generation aircraft, all prepared oilhole (damping hole), oilhole shape and area of orifice size are two major parameters that determine the oilhole damping characteristic, and the buffer oilhole is pressed the variation relation of area of orifice size with draft gear travel, can be divided into and become oilhole and stand oil hole.Become oilhole and can rationally control and prepare buffer in the instantaneous damping of total travel scope inner fluid, improved the ideality of buffer energy-absorbing efficiency, and guarantee that the buffer active force is and increases progressively trend in the total travel scope, be widely adopted on the present generation aircraft undercarriage.
Become oil hole structure and mainly back-up ring, spindle and supporting structure thereof, consist of, the gap between annular retaining ring inner ring and spindle cross section forms oilhole.For preventing the impact of spindle bias on the oilhole shape, generally select the composite structure of polygonal (as triangle, quadrilateral etc.) cross section spindle and annular retaining ring in design, but when the oilhole gross area is larger, the spindle that diameter is less and back-up ring are difficult to arrange the oilhole that satisfies the demands, increase spindle and back-up ring diameter, can pay again certain weight cost.
Summary of the invention
The purpose of this utility model is to provide a kind of in the situation that do not gain in weight, and better controls the shape of change oilhole and the change oil hole structure of area.
To achieve these goals, the utility model adopts following technological scheme: a kind of change oil hole structure of undercarriage buffer, comprise valve, spindle, back-up ring, and described change oil hole structure comprises the stand oil hole and becomes oilhole; Described stand oil hole is arranged on valve; The change oilhole of described change oilhole into forming between spindle cross section and back-up ring.
The utility model compared with prior art has following advantage: become oil hole structure and realize by the stand oil hole on valve, back-up ring and spindle cross section compound mode,, in the situation that do not gain in weight, better control shape and the area that becomes oilhole.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the A-A view of Fig. 1.
Embodiment
Be described in further detail below in conjunction with accompanying drawing 1,2 pairs of the utility model: a kind of change oil hole structure of undercarriage buffer, comprise valve 1, spindle 7, back-up ring 8, described change oil hole structure comprises stand oil hole 9 and becomes oilhole; Described stand oil hole 9 is arranged on valve 1; The change oilhole of described change oilhole into forming between spindle 7 cross sections and back-up ring 8.
Valve structure in embodiment adopts the applicant to be called in the name of 2012.12.11 application: a kind of undercarriage buffer valve piston ring assembly parts, application number is: 201210530911.6 patent application, that is: between valve 1 and nut 3 for being threaded, insure locking by screw 4; Piston ring 2 is positioned at the draw-in groove of valve and nut formation.
Valve 1 is connected with core bar 6 by screw thread, and by screw 5, insures locking; Back-up ring 8 is arranged in the circular groove of core bar 6 and valve 1 formation, and leaves the radial motion gap, is used for preventing that spindle 7 from producing clamping stagnation in buffer compression and stretching process, and stand oil hole 9 is arranged on valve 1.
In actual applications, area of orifice can be regulated according to actual conditions, when the oilhole gross area hour, can reduce the stand oil hole on valve or by regulating the spindle cross section, realize; When the oilhole gross area was larger, the stand oil bore portion was realized by quantity or the area in stand oil hole on governor valve, becomes oilhole and partly by regulating the spindle cross section, realizes.
The aircraft undercarriage buffer has adopted this type to become oil hole structure, and in drop-test, the buffer energy-absorbing effect is excellent, has passed through the test examination.
Claims (2)
1. the change oil hole structure of a undercarriage buffer, comprise valve (1), spindle (7), back-up ring (8), it is characterized in that: described change oil hole structure comprises stand oil hole (9) and becomes oilhole;
Described stand oil hole (9) is arranged on valve (1);
The change oilhole of described change oilhole into forming between spindle (7) cross section and back-up ring (8).
2. the change oil hole structure of a kind of undercarriage buffer according to claim 1, is characterized in that: 1 of the quantity in described stand oil hole at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203047617U CN203285899U (en) | 2013-05-30 | 2013-05-30 | Variable oilhole structure of undercarriage buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203047617U CN203285899U (en) | 2013-05-30 | 2013-05-30 | Variable oilhole structure of undercarriage buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203285899U true CN203285899U (en) | 2013-11-13 |
Family
ID=49542263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203047617U Expired - Lifetime CN203285899U (en) | 2013-05-30 | 2013-05-30 | Variable oilhole structure of undercarriage buffer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203285899U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629290A (en) * | 2013-11-27 | 2014-03-12 | 中国航空工业集团公司西安飞机设计研究所 | Variable damping oil needle of airplane buffer |
| CN106122349A (en) * | 2016-08-23 | 2016-11-16 | 中航飞机起落架有限责任公司 | A kind of fluid damping mechanism of buffer unit |
| CN108108526A (en) * | 2017-11-30 | 2018-06-01 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of undercarriage buffer becomes the discharge coefficient computational methods of oilhole |
| CN111473083A (en) * | 2020-04-21 | 2020-07-31 | 中国商用飞机有限责任公司 | Damping device |
| CN116985991A (en) * | 2023-09-25 | 2023-11-03 | 中国飞机强度研究所 | Oil-hole-variable aircraft landing gear buffer and buffering method thereof |
-
2013
- 2013-05-30 CN CN2013203047617U patent/CN203285899U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629290A (en) * | 2013-11-27 | 2014-03-12 | 中国航空工业集团公司西安飞机设计研究所 | Variable damping oil needle of airplane buffer |
| CN103629290B (en) * | 2013-11-27 | 2016-01-13 | 中国航空工业集团公司西安飞机设计研究所 | A kind of airplane buffer mutative damp spindle |
| CN106122349A (en) * | 2016-08-23 | 2016-11-16 | 中航飞机起落架有限责任公司 | A kind of fluid damping mechanism of buffer unit |
| CN108108526A (en) * | 2017-11-30 | 2018-06-01 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of undercarriage buffer becomes the discharge coefficient computational methods of oilhole |
| CN108108526B (en) * | 2017-11-30 | 2021-05-25 | 中国航空工业集团公司沈阳飞机设计研究所 | Flow coefficient calculation method for variable oil hole of undercarriage buffer |
| CN111473083A (en) * | 2020-04-21 | 2020-07-31 | 中国商用飞机有限责任公司 | Damping device |
| CN116985991A (en) * | 2023-09-25 | 2023-11-03 | 中国飞机强度研究所 | Oil-hole-variable aircraft landing gear buffer and buffering method thereof |
| CN116985991B (en) * | 2023-09-25 | 2023-12-15 | 中国飞机强度研究所 | Oil-hole-variable aircraft landing gear buffer and buffering method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |