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CN206754261U - A kind of helicopter landing gear oleo-pneumatic shock absorber - Google Patents

A kind of helicopter landing gear oleo-pneumatic shock absorber Download PDF

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Publication number
CN206754261U
CN206754261U CN201720161217.XU CN201720161217U CN206754261U CN 206754261 U CN206754261 U CN 206754261U CN 201720161217 U CN201720161217 U CN 201720161217U CN 206754261 U CN206754261 U CN 206754261U
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CN
China
Prior art keywords
shock absorber
landing gear
pneumatic shock
piston rod
helicopter landing
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Active
Application number
CN201720161217.XU
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Chinese (zh)
Inventor
王刺梅
张策
魏答楼
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.)
QING'AN GROUP CO Ltd
Qingan Group Co Ltd
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QING'AN GROUP CO Ltd
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Priority to CN201720161217.XU priority Critical patent/CN206754261U/en
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Abstract

The utility model belongs to the damping of civil helicopter undercarriage, and in particular to a kind of helicopter landing gear oleo-pneumatic shock absorber, shock absorbing effect is played when light helicopter lands.Current helicopter landing gear oleo-pneumatic shock absorber maintenance difficult, durability are bad.Helicopter landing gear oleo-pneumatic shock absorber of the present utility model, cylinder has fluid chamber and is open at one end, piston rod has air chamber and in piston head perforate, seal and slide in the cylinder, it is and spacing in the openend of cylinder by bushing, choke valve is installed in the hole of the piston head, the choke valve has throttle orifice, and the piston rod has some radial direction through hole in the part close to piston head.Compact-sized, small volume, in light weight, maintenance is simple;Other part processing precisions require relatively low in addition to choke valve;Reliability is high.

Description

A kind of helicopter landing gear oleo-pneumatic shock absorber
Technical field
The utility model belongs to the damping of civil helicopter undercarriage, and in particular to a kind of helicopter landing gear oil gas Damper, shock absorbing effect is played when light helicopter lands.
Background technology
Oleo-pneumatic shock absorber is installed on civil helicopter landing gear structure, bumper and absorbing shock function during for aircraft landing. Current helicopter landing gear oleo-pneumatic shock absorber maintenance difficult, durability are bad.
Utility model content
In order to overcome drawbacks described above, the utility model provides a kind of helicopter landing gear oleo-pneumatic shock absorber.
Helicopter landing gear oleo-pneumatic shock absorber of the present utility model, cylinder have fluid chamber and are open at one end, piston rod With air chamber and in piston head perforate, seal and slide in the cylinder, and it is spacing in the openend of cylinder by bushing, in institute State in the hole of piston head and choke valve is installed, the choke valve has throttle orifice, and the piston rod has close to the part of piston head There are some radial direction through hole.
The external diameter of the piston head is more than the external diameter of piston rod.The piston rod other end is connected with joint.The cylinder With pouring orifice.There is seal assembly between piston rod and bushing.
By the number for setting the size of fluid chamber, the size of air chamber and fluid injection rate so that when piston rod is to receipts Enter direction motion, for fluid by the throttle orifice air inlet chamber, throttle orifice can produce the hydraulic damping power of change, and air by To suitable compression.
When piston rod movement to equilbrium position, damper is in the normal state, i.e., damper is now off working state.
The buffer structure and each structural parameters are the results drawn after complicated simulation calculation, optimization design. In whole buffering course, hydraulic damping power and air damping are with the difference of the motion conditions such as outer load speed and in i.e. time-varying In change.
Beneficial effect:The oleo-pneumatic shock absorber of this kind of structure can be applied in all kinds of mechanisms for needing bumper and absorbing shock;Structure is tight Gather, small volume, it is in light weight, safeguard it is simple;Other part processing precisions require relatively low in addition to choke valve;Reliability is high.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model helicopter landing gear oleo-pneumatic shock absorber.
Embodiment
The primary structure of buffer is as shown in Figure 1.Cylinder 5 has fluid chamber 8 and is open at one end, and piston rod 2 has Air chamber 6 and in piston head perforate, seals in the cylinder 5 and slides, and spacing in the openend of cylinder 5 by bushing 3, Choke valve 4 is installed, the choke valve 4 has throttle orifice 7, and the piston rod 2 is close to piston head in the hole of the piston head Part has some radial direction through hole.
The external diameter of the piston head is more than the external diameter of piston rod 2.The other end of piston rod 2 is connected with joint 1.The cylinder Body 5 has pouring orifice 9.There is seal assembly between piston rod 2 and bushing 3.
By the number for setting the size of fluid chamber 8, the size of air chamber 6 and fluid injection rate so that when piston rod 2 to Direction motion is taken in, fluid can produce the hydraulic damping power of change by the air inlet chamber 6 of throttle orifice 7, throttle orifice 7, and Air is suitably compressed.When piston rod movement to equilbrium position, damper is in the normal state, i.e., damper is now non-work Make state.
When piston rod is in equilbrium position, damper is in the normal state, i.e., damper is now off working state.Work as damping When device is by outer load, damper continues to move to takeing in direction, fluid from throttle orifice air inlet chamber when, with piston rod movement The difference of speed, throttle orifice can produce the hydraulic damping power of change;Air chamber air continues to be compressed, and compressed air also produces The air damping of change.In whole buffering course, hydraulic damping power and air damping collective effect, produce to external applied load Shock absorbing effect.

Claims (6)

  1. A kind of 1. helicopter landing gear oleo-pneumatic shock absorber, it is characterised in that:Cylinder (5) has fluid chamber (8) and is open at one end, Piston rod (2) has air chamber (6) and in piston head perforate, in the cylinder (5) sealing slide, and by bushing (3) in cylinder The openend of body (5) is spacing, and choke valve (4) is provided with the hole of the piston head, and the choke valve (4) has throttle orifice (7), The piston rod (2) has some radial direction through hole in the part close to piston head.
  2. 2. helicopter landing gear oleo-pneumatic shock absorber according to claim 1, it is characterised in that:The external diameter of the piston head is big External diameter in piston rod (2).
  3. 3. helicopter landing gear oleo-pneumatic shock absorber according to claim 1, it is characterised in that:The piston rod (2) is another End is connected with joint (1).
  4. 4. the helicopter landing gear oleo-pneumatic shock absorber according to any one of claim 1-3, it is characterised in that:The cylinder (5) there is pouring orifice (9).
  5. 5. the helicopter landing gear oleo-pneumatic shock absorber according to any one of claim 1-3, it is characterised in that:Piston rod (2) there is seal assembly between bushing (3).
  6. 6. helicopter landing gear oleo-pneumatic shock absorber according to claim 5, it is characterised in that:When piston rod movement to balance During position, damper is in the normal state, i.e., damper is now off working state.
CN201720161217.XU 2017-02-22 2017-02-22 A kind of helicopter landing gear oleo-pneumatic shock absorber Active CN206754261U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720161217.XU CN206754261U (en) 2017-02-22 2017-02-22 A kind of helicopter landing gear oleo-pneumatic shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720161217.XU CN206754261U (en) 2017-02-22 2017-02-22 A kind of helicopter landing gear oleo-pneumatic shock absorber

Publications (1)

Publication Number Publication Date
CN206754261U true CN206754261U (en) 2017-12-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720161217.XU Active CN206754261U (en) 2017-02-22 2017-02-22 A kind of helicopter landing gear oleo-pneumatic shock absorber

Country Status (1)

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CN (1) CN206754261U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404467A (en) * 2018-12-10 2019-03-01 新昌县万合机械有限公司 A kind of hydraulic shock-absorbing cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109404467A (en) * 2018-12-10 2019-03-01 新昌县万合机械有限公司 A kind of hydraulic shock-absorbing cylinder

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