CN106352005A - Oil and gas separation buffer and exhaust method thereof - Google Patents
Oil and gas separation buffer and exhaust method thereof Download PDFInfo
- Publication number
- CN106352005A CN106352005A CN201611055504.9A CN201611055504A CN106352005A CN 106352005 A CN106352005 A CN 106352005A CN 201611055504 A CN201611055504 A CN 201611055504A CN 106352005 A CN106352005 A CN 106352005A
- Authority
- CN
- China
- Prior art keywords
- oil
- plunger
- outer tube
- filled
- oil pocket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/061—Mono-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
Abstract
The invention discloses an oil and gas separation buffer and an exhaust method thereof. The oil and gas separation buffer comprises an outer cylinder, a plunger piston arranged inside the outer cylinder, and an upper support arranged inside the lower portion of the outer cylinder; the top of the plunger piston stretches out relative to the outer cylinder; the top of the upper support is provided with a damping hole. The outer cylinder is divided into a first oil chamber located in the plunger piston and a second oil chamber located in the outer cylinder, and the first oil chamber is communicated with the second oil chamber through the damping hole; the top of the plunger piston is provided with an oil filling hole communicated with the first oil chamber; an exhaust vent is arranged on the side wall of the oil filling hole of the plunger piston to allow the oil filling hole to be communicated with the second oil chamber at the time of oil filling and allow the oil filling hole to be separated from the second oil chamber when oil filling is finished. According to the oil and gas separation buffer and the exhaust method thereof, the gas in the oil chamber of the buffer is completely discharged, and thus the working performance of the buffer is stable.
Description
Technical field
The present invention relates to a kind of oil-gas separated-type buffer and its method for exhausting, belong to aviation undercarriage field.
Background technology
Most undercarriage all adopts oil-gas type buffer at present.The indoor design of oil-gas type buffer exists always
Among improving and developing.In order to improve the energy-absorbing capacity of undercarriage buffer, reduce undercarriage landing, especially ground is slided
Row and manipulate when dynamic load, designer develop single-stage bicavate buffer (exist in a buffer low pressure and
Two air chambers of high pressure), and increase spring control choke valve in the damper leg piston of bicavate device, make in given load
Valve will be opened, thus improving the shock-absorbing capacity of damper leg.
However, existing oil-gas separated-type buffer haves such problems as that oil pocket aerofluxuss are difficult or cannot discharge clean, the row of commonly using
Gas method frequently with oil-filled standing, oil-filled when tension and compression piston rod etc., these method operating efficiencies and enforcement difficulty all very big, and
Gas is discharged a kind of clean all highly difficult, single-chamber oil-gas type as disclosed in Chinese utility model patent cn201420188348.3
Big work(amount undercarriage buffer.If pure oil pocket gas row is thorough, should be that fluid flows through damping hole energy absorption, when having
During gas, bubble damping when damping hole can be greatly reduced, and can affect to buffer efficiency, meanwhile, if pure oil pocket aerofluxuss
Design is unreasonable, can affect buffer hydraulic damping and affect the work(energy absorption capability of buffer.When the internal die cavity of buffer is multiple
When miscellaneous, when fluid chamber is made up of multiple annular chambers etc., by the break-in of the aerofluxuss of long-time standing and buffer can not effectively by
Oil pocket gas is discharged, and not only affects the performance of buffer, and greatly reduces the dress examination work efficiency of buffer.
Content of the invention
The present invention is intended to provide a kind of oil-gas separated-type buffer and its method for exhausting, this buffer can make buffer oil
Intracavity gas are thoroughly discharged, so that buffer stable work in work.Further, the buffer structure of the present invention is simple,
Convenient to operation.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of oil-gas separated-type buffer, including outer tube, is arranged on the plunger in outer tube, and is arranged on upper in outer tube bottom
Support；The top of described plunger is stretched out with respect to outer tube, and the top of described upper support has damping hole, and described outer tube is divided by plunger
It is that this first oil pocket and the second oil pocket pass through positioned at the first oil pocket in plunger with positioned at the second oil pocket between plunger and outer tube
Damping hole connects；It is structurally characterized in that, described plunger head has an oil-filled hole connecting with the first oil pocket, described plunger oil-filled
Have when oil-filled on the wall of hole side keep oil-filled hole to connect with the second oil pocket, filling keep after finishing oil-filled hole and the second oil pocket every
Disconnected steam vent.
The present invention dexterously have chosen the position of opening of steam vent, by mobile plunger, thus keeping when realizing oil-filled filling
Oilhole and the connection of the second oil pocket, filling keep oil-filled hole and the second oil pocket cut-off after finishing, while aerofluxuss, do not affect to buffer
The hydraulic damping parameter of device.The present invention, by changing the position of steam vent before and after setting steam vent, filling, realizes buffer fluid
The discharge of chamber gas.The inventive method structure is simple, can efficiently exclude the gas of buffer oil pocket, it is to avoid oil pocket gas pair
The impact of shock-absorbing capacity.
According to embodiments of the invention, the present invention can also be made with further optimization, below for the skill of formation after optimizing
Art scheme:
In order to ensure the sealing effectiveness between outer tube and plunger, between described outer tube and plunger, it is provided with sealing ring.
Connect with the second oil pocket for hole oil-filled when better ensuring that oil-filled, filling keeps oil-filled hole after finishing and the second oil
Chamber separates, and is provided with gap, this gap makes steam vent not outer between the sealing ring of described plunger head and outer tube bottom inner face
Cylinder blocks, and the stroke that this gap can move up less than plunger.
As a kind of specific adjustment structure form, the top of described plunger is locked cylinder top outside by nut, this post
Plug can be moved by nut driving axial；Gap between described sealing ring and outer tube bottom inner face be less than nut lower surface with
The distance between Gewindefreistiche end face of plunger.
Preferably, the bottom of described outer tube is built with lower support, described upper support and lower supports for supporting hollow work
Stopper rod, this piston is built with floating piston；Piston rod cut-off is divided into oil pocket and air cavity by described floating piston.Further,
Equipped with for the filling valve to air cavity inflation on described piston rod.
In order to ensure the sealing of oil pocket after oil-filled, the oil-filled hole top of described plunger is equipped with blocking cap.
Based on same inventive concept, present invention also offers a kind of aerofluxuss side of described oil-gas separated-type buffer
Method, it comprises the steps:
S1, oil-filled before, move down plunger, so that steam vent is not blocked；
S2, oil-filled when fluid be filled with the first oil pocket from oil-filled hole, when oil level be charged to upper support inner face when, in the first oil pocket
Oil by damping hole enter the second oil pocket, the discharge by steam vent for the air in the second oil pocket, until the first oil pocket, second
Oil pocket is completely filled with oil；
After the completion of s3, filling, each movement for several times, will remain in the gas at the inner bore chamfering of outer tube upper end up and down to make plunger
By steam vent (16 discharges；
S4, make on plunger move and so that steam vent is separated.
The top of described plunger is locked cylinder top outside by nut, in step s1, unscrews the nut being arranged on plunger
Fixing button number, plunger moves down；In step s4, tighten the fixing button number of nut, plunger moves.
It is provided with sealing ring between described outer tube and plunger, in step s4, fit between sealing ring and outer tube bottom inner face
And steam vent is separated.
Compared with prior art, the invention has the beneficial effects as follows: the present invention can efficiently exclude the gas of buffer oil pocket,
Avoid the impact to shock-absorbing capacity for the oil pocket gas, to buffer structure design, there is extensive directive significance.
The present invention can conveniently and efficiently solve existing oil-gas separated-type buffer oil pocket exhausting problem it is ensured that buffer oil pocket
Gas is completely exhausted out, and makes buffer working stability, performance efficiency.
Brief description
The schematic diagram that Fig. 1 completes for Oil-gas Separation buffer filling of the present invention；
Fig. 2 is Fig. 1 top close-up schematic view；
Fig. 3 is schematic diagram when Oil-gas Separation buffer of the present invention is oil-filled；
Fig. 4 is Fig. 3 top close-up schematic view.
In in figure:
1- blocking cap, 2- nut, 3- outer tube, 4- sealing ring, 5- plunger, 6- supports, supports under 7-, 8- floating piston, 9- piston
Bar, 10- filling valve；11- first oil pocket；12- second oil pocket；13- air cavity；14- damping hole；The oil-filled hole of 15-；16- steam vent；
17- outer tube bottom inner face.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that in the feelings do not conflicted
Under condition, the embodiment in the present invention and the feature in embodiment can be mutually combined.For sake of convenience, hereinafter as occurred
" on ", D score, "left", "right" printed words, only represent consistent with the upper and lower, left and right direction of accompanying drawing itself, limit is not played to structure
It is set for using.
A kind of oil-gas separated-type buffer, as shown in figs. 1 and 3, including outer tube 3, plunger 5, nut 2, blocking cap 1, sealing ring
4th, upper support 6, lower support 7, floating piston 8, piston rod 9, filling valve 10 and associated seal.Based on oil-gas separated-type buffering
Device its oil-filled when can in time the gas in oil pocket be discharged clean, its filling completes final vacuum and can seal, and does not interfere with hydraulic pressure and hinders
Buddhist nun.
As shown in Figure 2, Figure 4 shows, on plunger 5, top offers oil-filled hole 15 along axis, simultaneously in plunger 5 top axis
Less steam vent 16 is made on vertical direction.
As Fig. 3, Fig. 4, when buffer is oil-filled, sealing ring 4 and the outer tube 3 bottom inner face at plunger 5 top should have gap, should
Gap can guarantee that steam vent 16 is not blocked, and the distance less than nut 2 end face and the end face of plunger 5 Gewindefreistiche.
As shown in Figure 1, Figure 2, after the completion of buffer filling, sealing ring 4 end face at plunger 5 top should with outer tube 3 bottom inner face
Fit, and the steam vent 16 on plunger 5 is in inside outer tube 3 upper mounting holes.
The concrete steps of exhausting of oil-gas separated-type buffer is as follows:
1), in implementation process, when oil-filled, first pass through and unscrew the fixing button number of the nut 2 being arranged on plunger 5, make to reach plunger 5
On steam vent 16 expose steam vent 16 diameter of outer tube 3 bottom end face about 1/2nd, outer tube 3 upper end inner port edge chamfering foot
Enough steam vents 16 are overall to be exposed；As shown in figure 4, steam vent 16 is not blocked completely；
2) when oil-filled, fluid is filled with the first oil pocket 11 from oil-filled hole 15, when oil level is charged to upper support 6 inner face, the first oil pocket
Oil in 11 enters the second oil pocket 12 by damping hole, and the air in the second oil pocket 12 passes through the discharge of steam vent 16, until the
One oil pocket 11, the second oil pocket 12 are completely filled with oil；
3) after the completion of filling, plunger 5 is moved up and down for several times, during this, remain in a small amount of gas of outer tube 3 upper end inner bore chamfering
Know from experience and discharge；
4) tighten the nut 2 on plunger 5, now, nut 2 end face has gap with the end face of plunger spiral shell 5 stricture of vagina escape, thus can
Ensure that the sealing ring 4 at plunger 5 top is fitted completely with outer tube 3 bottom inner face, as shown in Figure 2；Make connection oil gas a and oil gas b
Steam vent 16 sealed by sealing ring 4, thus not affecting the hydraulic damping parameter of buffer.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, and not
For limiting the scope of the present invention, after having read the present invention, the various equivalent form of values to the present invention for the those skilled in the art
Modification each fall within the application claims limited range.
Claims (10)
1. a kind of oil-gas separated-type buffer, including outer tube (3), is arranged on the plunger (5) in outer tube (3), and setting is outside
Upper support (6) in cylinder (3) bottom；
The top of described plunger (5) is stretched out with respect to outer tube (3), and the top of described upper support (6) has damping hole (14), described
Outer tube (3) by plunger (5) be divided into positioned at the first oil pocket (11) in plunger (5) and be located between plunger (5) and outer tube (3) the
Two oil pockets (12), this first oil pocket (11) is connected by damping hole (14) with the second oil pocket (12)；It is characterized in that:
Described plunger (5) top has the oil-filled hole (15) connecting with the first oil pocket (11), the oil-filled hole (15) of described plunger (5)
Have on the wall of side when oil-filled keep oil-filled hole (15) to connect with the second oil pocket (12), filling keeps oil-filled hole (15) after finishing and
The steam vent (16) that second oil pocket (12) separates.
2. oil-gas separated-type buffer according to claim 1 is it is characterised in that between described outer tube (3) and plunger (5)
It is provided with sealing ring (4).
3. oil-gas separated-type buffer according to claim 2 is it is characterised in that the sealing ring at described plunger (5) top
(4) it is provided with gap and outer tube (6) bottom inner face (17) between, this gap makes steam vent (15) not blocked by outer tube (6), and should
The stroke that gap can move up less than plunger (5).
4. oil-gas separated-type buffer according to claim 3 is it is characterised in that spiral shell is passed through at the top of described plunger (5)
Female (2) lock at outer tube (3) top, and this plunger (5) can be moved by nut driving axial；Described sealing ring (4) and outer tube (6)
Gap between bottom inner face (17) is less than the distance between Gewindefreistiche end face of nut (2) lower surface and plunger (5).
5. the oil-gas separated-type buffer according to any one of claim 1-4 is it is characterised in that described outer tube (3)
Built with lower support (7), described upper support (6) and lower support (7) are used for supporting hollow piston rod (9), this piston (9) for bottom
Built with floating piston (8)；Piston rod (9) cut-off is divided into oil pocket and air cavity (13) by described floating piston (8).
6. oil-gas separated-type buffer according to claim 5 is it is characterised in that equipped with being used on described piston rod (9)
The filling valve (10) inflated to air cavity (13).
7. the oil-gas separated-type buffer according to any one of claim 1-4 is it is characterised in that described plunger (5)
Oil-filled hole (15) top is equipped with blocking cap (1).
8. a kind of method for exhausting of the oil-gas separated-type buffer as described in one of claim 1-7 it is characterised in that include as
Lower step:
S1, oil-filled before, move down plunger (5), so that steam vent (16) is not blocked；
S2, oil-filled when fluid be filled with the first oil pocket (11) from oil-filled hole (15), when oil level is charged to upper support (6) inner face
When, the oil in the first oil pocket (11) enters the second oil pocket (12) by damping hole (14), and the air in the second oil pocket (12) passes through
The discharge of steam vent (16), until the first oil pocket (11), the second oil pocket (12) are completely filled with oil；
After the completion of s3, filling, each movement for several times, will remain at the inner bore chamfering of outer tube (3) upper end up and down to make plunger (5)
Gas pass through steam vent (16 discharge；
S4, make upper shifting of plunger (5) and so that steam vent (16) is separated.
9. the method for exhausting of oil-gas separated-type buffer according to claim 8 is it is characterised in that described plunger (5)
Top is passed through nut (2) and is locked at outer tube (3) top, in step s1, unscrews what the nut (2) being arranged on plunger (5) was fixed
Button number, plunger (5) moves down；In step s4, tighten the fixing button number of nut (2), plunger (5) is upper to be moved.
10. oil-gas separated-type buffer according to claim 8 method for exhausting it is characterised in that described outer tube (3) with
Be provided with sealing ring (4) between plunger (5), in step s4, fit between sealing ring (4) and outer tube (6) bottom inner face (17) and
Steam vent (16) is separated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611055504.9A CN106352005B (en) | 2016-11-25 | 2016-11-25 | A kind of oil-gas separated-type buffer and its method for exhausting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611055504.9A CN106352005B (en) | 2016-11-25 | 2016-11-25 | A kind of oil-gas separated-type buffer and its method for exhausting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106352005A true CN106352005A (en) | 2017-01-25 |
| CN106352005B CN106352005B (en) | 2018-02-27 |
Family
ID=57862535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611055504.9A Active CN106352005B (en) | 2016-11-25 | 2016-11-25 | A kind of oil-gas separated-type buffer and its method for exhausting |
Country Status (1)
| Country | Link |
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| CN (1) | CN106352005B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744365A (en) * | 2021-02-25 | 2021-05-04 | 北京精密机电控制设备研究所 | Method for guaranteeing consistency of damping characteristics of shimmy damper of aircraft landing gear system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530096Y (en) * | 2002-01-31 | 2003-01-08 | 嘉兴嘉嘉汽车零部件制造有限公司 | Dual-drum inflating vibration damper |
| JP2009024726A (en) * | 2007-07-17 | 2009-02-05 | Kayaba Ind Co Ltd | Pneumatic shock absorber |
| CN201202762Y (en) * | 2008-05-12 | 2009-03-04 | 浙江正裕工业有限公司 | Bumper absorber with nine-shift adjustable mechanism |
| CN204004134U (en) * | 2014-04-17 | 2014-12-10 | 中国航空工业集团公司沈阳飞机设计研究所 | The large merit amount of a kind of single chamber oil-gas type undercarriage buffer |
| CN204175698U (en) * | 2014-08-27 | 2015-02-25 | 华中科技大学无锡研究院 | The bilaterally adjustable Quick cylinder of a kind of ouput force |
| JP2015072047A (en) * | 2013-10-03 | 2015-04-16 | カヤバ工業株式会社 | Hydraulic shock absorber |
| CN204784383U (en) * | 2015-05-25 | 2015-11-18 | 宁波美亚达汽车部件制造有限公司 | A oil gas combination shock absorber for weighing card driver's cabin |
| CN105074266A (en) * | 2013-03-22 | 2015-11-18 | 萱场工业株式会社 | Shock absorber |
-
2016
- 2016-11-25 CN CN201611055504.9A patent/CN106352005B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2530096Y (en) * | 2002-01-31 | 2003-01-08 | 嘉兴嘉嘉汽车零部件制造有限公司 | Dual-drum inflating vibration damper |
| JP2009024726A (en) * | 2007-07-17 | 2009-02-05 | Kayaba Ind Co Ltd | Pneumatic shock absorber |
| CN201202762Y (en) * | 2008-05-12 | 2009-03-04 | 浙江正裕工业有限公司 | Bumper absorber with nine-shift adjustable mechanism |
| CN105074266A (en) * | 2013-03-22 | 2015-11-18 | 萱场工业株式会社 | Shock absorber |
| JP2015072047A (en) * | 2013-10-03 | 2015-04-16 | カヤバ工業株式会社 | Hydraulic shock absorber |
| CN204004134U (en) * | 2014-04-17 | 2014-12-10 | 中国航空工业集团公司沈阳飞机设计研究所 | The large merit amount of a kind of single chamber oil-gas type undercarriage buffer |
| CN204175698U (en) * | 2014-08-27 | 2015-02-25 | 华中科技大学无锡研究院 | The bilaterally adjustable Quick cylinder of a kind of ouput force |
| CN204784383U (en) * | 2015-05-25 | 2015-11-18 | 宁波美亚达汽车部件制造有限公司 | A oil gas combination shock absorber for weighing card driver's cabin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112744365A (en) * | 2021-02-25 | 2021-05-04 | 北京精密机电控制设备研究所 | Method for guaranteeing consistency of damping characteristics of shimmy damper of aircraft landing gear system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106352005B (en) | 2018-02-27 |
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Effective date of registration: 20190604 Address after: 333001 Jingdezhen Aviation Road 6-8, Jiangxi Province Patentee after: China Helicopter Research and Development Institute Address before: 410200 Airway of Wangcheng Economic Development Zone, Changsha City, Hunan Province Patentee before: AVIC Landing Gear Advanced Manufacturing Corp. |
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| TR01 | Transfer of patent right |