CN105526298A - Shock absorption protection method for aircraft landing gear - Google Patents
Shock absorption protection method for aircraft landing gear Download PDFInfo
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- CN105526298A CN105526298A CN201410580556.2A CN201410580556A CN105526298A CN 105526298 A CN105526298 A CN 105526298A CN 201410580556 A CN201410580556 A CN 201410580556A CN 105526298 A CN105526298 A CN 105526298A
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- inner barrel
- outer cylinder
- cylinder body
- damping
- spring
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Abstract
The invention discloses a shock absorption protection method for an aircraft landing gear. The method comprises the following steps: an oil pressure space is full of oil liquid; under the extrusion of external force, an inner barrel does compression movement relatively to an outer baffle, and the oil liquid passes through a damping hole in a damping body; after entering a pressure relieving space, the oil liquid pushes a floating piston to compress a spring; after the external force disappears, the spring pushes the floating piston, the floating piston pushes the oil liquid in the pressure relieving space back to the oil pressure space, and the oil liquid in the oil pressure space pushes the inner barrel, so that the inner barrel does stretching movement relatively to the outer barrel. In the above method, a first layer of protection formed by a protective sleeve is adopted to block an external object; after the external object penetrates through the protective sleeve, a second layer of protection formed by sand is adopted to block the external object. The method adopts the protective sleeve and sand to form multiple layers of protection, so that the outer barrel can be effectively prevented from being impacted by the external object to fracture.
Description
Technical field
The present invention relates to aircraft field, particularly relate to a kind of damping protection method for aircraft landing gear.
Background technique
Undercarriage is the special arrangement for taking off landing.In aircraft landing process, always with certain speed impacts ground, undercarriage bears and slows down this shock, thus alleviates the stand under load of aircraft.The critical component that undercarriage slows down this bump stroke is exactly bradyseism device.If the design of bradyseism device is unreasonable, will aircraft be made to bear larger load, cause airplane design weight to improve.If bradyseism device breaks down, will cause aircraft hard landing, airframe structure is destroyed, and even occurs fatal crass.
Existing bradyseism device adopts air-fuel mixture formula structure, and its shortcoming is, air cavity easily leaks.Once air cavity leaks, the cushioning effect of bradyseism device will significantly weaken, and bradyseism device cannot return.More weak cushioning effect will when aircraft landing, and undercarriage and ground first time collision rift disappear.
The oil pocket chamber wall of existing bradyseism device can bear great pressure, and as bradyseism device is operationally subject to the shock of exterior object, oil pocket chamber wall very easily breaks, oil liquid leakage, finally causes bradyseism device thoroughly to lose efficacy.
Summary of the invention
Namely object of the present invention is to overcome the deficiencies in the prior art, provides a kind of undercarriage damping protection method.
Object of the present invention is achieved through the following technical solutions:
Utilize bradyseism device as described below;
Bradyseism device comprises inner barrel, outer cylinder body, floating piston, damping body and spring; Outer cylinder body upper end closed, outer cylinder body lower end is open, and inner barrel upper end is open, inner barrel lower end closed; Floating piston and spring are arranged in inner barrel, and one end of spring is connected with floating piston, and the other end of spring is connected with the bottom interior surface of inner barrel; Spring outer wrapping elastic rubber column, the diameter of elastic rubber column is less than the internal diameter of inner barrel; Damping body is arranged at the top of inner barrel, and damping body offers damping hole; Inner barrel slides and is arranged in outer cylinder body, and the space between inner barrel top and outer cylinder body top forms oil pressure space; Space in inner barrel between floating piston and damping body forms slow pressure space; Also comprise the protecting jacket being placed on outer cylinder body periphery, between the internal surface of protecting jacket and the outer surface of outer cylinder body, be full of the grains of sand;
Concrete grammar is as follows:
Oil pressure is full of fluid in space, by external force extruding time, inner barrel does compression movement relative to outer cylinder body, fluid by the damping hole on damping body, now can produce damping thus absorb aircraft landing time partial capability.Fluid promotes floating piston Compress Spring, further absorptivity after entering slow pressure space.After external force disappears, spring promotes floating piston, and the fluid in slow pressure space is pushed back oil pressure space by floating piston, and the fluid in oil pressure space promotes inner barrel, makes inner barrel do stretching exercise relative to outer cylinder body, so namely realizes the return of bradyseism device.
In the above-mentioned methods, adopt protecting jacket to form first layer protection and stop exterior object, exterior object is through after protecting jacket, and the second layer protection adopting the grains of sand to be formed stops exterior object.
The present invention adopts spring to substitute air in inner barrel, avoids air leakage and causes the cushioning effect of bradyseism device cannot the problem of return with bradyseism device by significantly weakening.
Spring easily damages when excess compression, arranges the elastic rubber column of parcel spring for this reason, prevents spring to be overly compressed, and improves reliability of the present invention further.
In order to avoid outer cylinder body breaks by external object strike, protecting jacket is set, and is full of the grains of sand between protecting jacket and outer cylinder body, so effectively can form the effective protection to outer cylinder body.Protecting jacket forms first layer protection to be stopped exterior object, and exterior object is through after protecting jacket, and the second layer protection that the grains of sand are formed stops exterior object.The grains of sand possess good cushioning effect, can effectively avoid exterior object directly to contact with outer cylinder body.
Further, spiral type groove is offered in the periphery of described elastic rubber column.
Spiral type groove is set, makes elastic rubber column be easier to be compressed, avoid elastic rubber column to impact shock-absorbing capacity of the present invention.
Further, the cross section of described spiral type groove is set to triangle.
The cross section of spiral type groove is triangle, makes elastic rubber column be easier to be compressed further.
Further, seal support part is adopted to seal between described outer cylinder body bottom interior surface and described inner barrel outer surface.
Seal support part is set, avoids the oil liquid leakage in outer cylinder body.
Further, described seal support part is connected with described outer cylinder body by bearing pin.
Further, described damping hole is opened in the central position of described damping body.
Further, connecting body is set on the top of the bottom of described inner barrel and described outer cylinder body.
Connecting body is for being fixed on undercarriage by the present invention.
In sum, advantage of the present invention and beneficial effect are:
1. the present invention adopts spring to substitute air in inner barrel, avoids air leakage and causes the cushioning effect of vibration damper cannot the problem of return with vibration damper by significantly weakening;
2. the elastic rubber column of parcel spring is set, prevents spring to be overly compressed, improve reliability of the present invention further;
3. the present invention adopts protecting jacket and the grains of sand to form multilayer proofing, can effectively prevent outer cylinder body from breaking by external object strike;
4. spiral type groove is set, makes elastic rubber column be easier to be compressed, avoid elastic rubber column to impact shock-absorbing capacity of the present invention;
5. the cross section of spiral type groove is triangle, makes elastic rubber column be easier to be compressed further;
6. seal support part is set, avoids the oil liquid leakage in outer cylinder body.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiments of the invention, be briefly described to the accompanying drawing used required for describing in the embodiment of the present invention below.Apparent, the accompanying drawing in the following describes is only some embodiments recorded in the present invention, for a person skilled in the art, when not paying creative work, according to accompanying drawing below, can also obtain other accompanying drawing.
Fig. 1 is the structural representation of bradyseism device in the present invention;
The component title that wherein reference character is corresponding is as follows:
1-inner barrel, 2-outer cylinder body, 3-floating piston, 4-damping body, 5-spring, 6-damping hole, 7-oil pressure space, 8-slow pressure space, 9-seal support part, 10-bearing pin, 11-connecting body, 12-elastic rubber column, 13-spiral groove, 14-protecting jacket, the 15-grains of sand.
Embodiment
In order to make those skilled in the art understand the present invention better, below in conjunction with the accompanying drawing in the embodiment of the present invention, clear, complete description is carried out to the technological scheme in the embodiment of the present invention.Apparent, embodiment described below is only the part in the embodiment of the present invention, instead of all.Based on the embodiment that the present invention records, other all embodiment that those skilled in the art obtain when not paying creative work, all in the scope of protection of the invention.
Embodiment 1:
As shown in Figure 1, undercarriage damping protection method, utilizes bradyseism device as described below;
Bradyseism device comprises inner barrel 1, outer cylinder body 2, floating piston 3, damping body 4 and spring 5; Outer cylinder body 2 upper end closed, outer cylinder body 2 lower end is open, and inner barrel 1 upper end is open, inner barrel 1 lower end closed; Floating piston 3 and spring 5 are arranged in inner barrel 1, and one end of spring 5 is connected with floating piston 3, and the other end of spring 5 is connected with the bottom interior surface of inner barrel 1; Spring 5 outer wrapping elastic rubber column 12, the diameter of elastic rubber column 12 is less than the internal diameter of inner barrel 1; Damping body 4 is arranged at the top of inner barrel 1, damping body 4 offers damping hole 6; Inner barrel 1 slides and is arranged in outer cylinder body 2, and the space between inner barrel 1 top and outer cylinder body 2 top forms oil pressure space 7; Space in inner barrel 1 between floating piston 3 and damping body 4 forms to delay presses space 8; Also comprise the protecting jacket 14 being placed on outer cylinder body 2 periphery, between the internal surface of protecting jacket 14 and the outer surface of outer cylinder body 2, be full of the grains of sand 15;
Concrete grammar is as follows:
Be full of fluid in oil pressure space 7, when by external force extruding, inner barrel 1 does compression movement relative to outer cylinder body 2, and fluid passes through the damping hole 6 on damping body 4, partial capability when now can produce damping thus absorb aircraft landing.Fluid promotes floating piston 3 Compress Spring 5, further absorptivity after entering slow pressure space 8.After external force disappears, spring 5 promotes floating piston 3, and the fluid in slow pressure space 8 is pushed back oil pressure space 7 by floating piston 3, and the fluid in oil pressure space 7 promotes inner barrel 1, make inner barrel 1 do stretching exercise relative to outer cylinder body 2, so namely realize the return of bradyseism device;
In the above-mentioned methods, adopt protecting jacket 14 to form first layer protection and stop exterior object, exterior object is through after protecting jacket 14, and the second layer protection adopting the grains of sand 15 to be formed stops exterior object.
The present invention adopts spring 5 to substitute air in inner barrel 1, avoids air leakage and causes the cushioning effect of bradyseism device cannot the problem of return with bradyseism device by significantly weakening.
Spring 5 easily damages when excess compression, arranges the elastic rubber column 12 of parcel spring 5 for this reason, prevents spring 5 to be overly compressed, and improves reliability of the present invention further.
In order to avoid outer cylinder body 2 breaks by external object strike, protecting jacket 14 is set, and is full of the grains of sand 15 between protecting jacket 14 and outer cylinder body 2, so effectively can form the effective protection to outer cylinder body 2.Protecting jacket 14 forms first layer protection to be stopped exterior object, and exterior object is through after protecting jacket 14, and the second layer protection that the grains of sand 15 are formed stops exterior object.The grains of sand possess good cushioning effect, can effectively avoid exterior object directly to contact with outer cylinder body 2.
Embodiment 2:
As shown in Figure 1, the present embodiment, on the basis of embodiment 1, offers spiral type groove 13 in the periphery of described elastic rubber column 12.
Spiral type groove 13 is set, makes elastic rubber column 12 be easier to be compressed, avoid elastic rubber column 12 to impact shock-absorbing capacity of the present invention.
Embodiment 3:
As shown in Figure 1, the cross section of described spiral type groove 13, on the basis of embodiment 2, is set to triangle by the present embodiment.
The cross section of spiral type groove 13 is triangle, makes elastic rubber column 12 be easier to be compressed further.
Embodiment 4:
As shown in Figure 1, the present embodiment, on the basis of any one embodiment above-mentioned, adopts seal support part 9 to seal between described outer cylinder body 2 bottom interior surface and described inner barrel 1 outer surface.
Seal support part 9 is set, avoids the oil liquid leakage in outer cylinder body 2.
Embodiment 5:
As shown in Figure 1, the present embodiment is on the basis of embodiment 4, and described seal support part 9 is connected with described outer cylinder body 2 by bearing pin 10.
Embodiment 6:
As shown in Figure 1, described damping hole 6, on the basis of any one embodiment above-mentioned, is opened in the central position of described damping body 4 by the present embodiment.。
Embodiment 7:
As shown in Figure 1, the present embodiment, on the basis of any one embodiment above-mentioned, arranges connecting body 11 in the bottom of described inner barrel 1 and the top of described outer cylinder body 2.
Connecting body 11 is for being fixed on undercarriage by the present invention.
As mentioned above, just the present invention can be realized preferably.
Claims (7)
1. undercarriage damping protection method, is characterized in that:
Utilize bradyseism device as described below;
Bradyseism device comprises inner barrel (1), outer cylinder body (2), floating piston (3), damping body (4) and spring (5); Outer cylinder body (2) upper end closed, outer cylinder body (2) lower end is open, and inner barrel (1) upper end is open, inner barrel (1) lower end closed; Floating piston (3) and spring (5) are arranged in inner barrel (1), and one end of spring (5) is connected with floating piston (3), and the other end of spring (5) is connected with the bottom interior surface of inner barrel (1); Spring (5) outer wrapping elastic rubber column (12), the diameter of elastic rubber column (12) is less than the internal diameter of inner barrel (1); Damping body (4) is arranged at the top of inner barrel (1), damping body (4) offers damping hole (6); Inner barrel (1) slides and is arranged in outer cylinder body (2), and the space between inner barrel (1) top and outer cylinder body (2) top forms oil pressure space (7); Space between inner barrel (1) interior floating piston (3) and damping body (4) forms to delay presses space (8); Also comprise the protecting jacket (14) being placed on outer cylinder body (2) periphery, between the internal surface of protecting jacket (14) and the outer surface of outer cylinder body (2), be full of the grains of sand (15);
Concrete grammar is as follows:
Oil pressure space is full of fluid in (7), and when by external force extruding, inner barrel (1) does compression movement relative to outer cylinder body (2), and fluid is by the damping hole (6) on damping body (4);
Fluid promotes floating piston (3) Compress Spring (5) after entering slow pressure space (8);
After external force disappears, spring (5) promotes floating piston (3), the fluid delayed in pressure space (8) is pushed back oil pressure space (7) by floating piston (3), and the fluid in oil pressure space (7) promotes inner barrel (1), makes inner barrel (1) do stretching exercise relative to outer cylinder body (2);
In the above-mentioned methods, adopt protecting jacket (14) to form first layer protection and stop exterior object, exterior object is through after protecting jacket (14), and the second layer protection adopting the grains of sand (15) to be formed stops exterior object.
2. undercarriage damping protection method according to claim 1, is characterized in that:
Spiral type groove (13) is offered in the periphery of described elastic rubber column (12).
3. undercarriage damping protection method according to claim 2, is characterized in that:
The cross section of described spiral type groove (13) is set to triangle.
4. undercarriage damping protection method according to claim 1, is characterized in that:
Seal support part (9) is adopted to seal between described outer cylinder body (2) bottom interior surface and described inner barrel (1) outer surface.
5. undercarriage damping protection method according to claim 4, is characterized in that:
Described seal support part (9) is connected with described outer cylinder body (2) by bearing pin (10).
6. undercarriage damping protection method according to claim 1, is characterized in that:
Described damping hole (6) is opened in the central position of described damping body (4).
7., according to the undercarriage damping protection method in claim 1 ~ 6 described in any one, it is characterized in that:
On the top of the bottom of described inner barrel (1) and described outer cylinder body (2), connecting body (11) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410580556.2A CN105526298A (en) | 2014-10-27 | 2014-10-27 | Shock absorption protection method for aircraft landing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410580556.2A CN105526298A (en) | 2014-10-27 | 2014-10-27 | Shock absorption protection method for aircraft landing gear |
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| Publication Number | Publication Date |
|---|---|
| CN105526298A true CN105526298A (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410580556.2A Pending CN105526298A (en) | 2014-10-27 | 2014-10-27 | Shock absorption protection method for aircraft landing gear |
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| CN (1) | CN105526298A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296691A (en) * | 2018-11-09 | 2019-02-01 | 中国直升机设计研究所 | A kind of two-chamber buffer |
-
2014
- 2014-10-27 CN CN201410580556.2A patent/CN105526298A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109296691A (en) * | 2018-11-09 | 2019-02-01 | 中国直升机设计研究所 | A kind of two-chamber buffer |
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Application publication date: 20160427 |