CN1584359A - Leakage-proof oil-gas spring - Google Patents
Leakage-proof oil-gas spring Download PDFInfo
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- CN1584359A CN1584359A CN 200410010887 CN200410010887A CN1584359A CN 1584359 A CN1584359 A CN 1584359A CN 200410010887 CN200410010887 CN 200410010887 CN 200410010887 A CN200410010887 A CN 200410010887A CN 1584359 A CN1584359 A CN 1584359A
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Abstract
A spring is used for vehicle to prevent gas or oil from leakage. It is welded, consisting of a cylinder, a piston, a piston rod, a guide sealing device and a damping device, meanwhile, an additional cylinder sleeved the said cylinder to form an additional chamber that is filled with nitrogen and sealed by a airtight component on a cylinder cap. The piston assembly makes the main cylinder chamber divided into a lower section and an annular section. The piston rod has a hollow chamber connected with the lower section via the damping device. Two inflation valves are welded on the outer wall of the additional chamber and the piston assembly respectively.
Description
Technical field
The invention belongs to the core component in the automobile hydro pneumatic suspension in the AE field.
Background technique
Hydro-pneumatic spring is the structure-integrated product of gas spring and hydraulic type vibration damper in essence.Its nonlinear variable-stiffness characteristic and asymmetry damping characteristic are particularly suitable for the designing requirement of automotive suspension.Yet owing to exist gas leakage problem and tonifying Qi operation that higher technical difficulty is arranged, so far, hydro-pneumatic spring fails to be applied on automotive suspension.Be mainly used in heavy mining truck, large-scale transport vehicle, wheeled tank, armored vehicle at present, and on other military off-road vehicle.
Summary of the invention
The objective of the invention is has higher shortcomings such as technical difficulty for overcoming gas leakage problem and the tonifying Qi operation that prior art exists, and provides a kind of compact structure, tonifying Qi cycle long, the anti-leakage hydro-pneumatic spring that tonifying Qi is easy to operation.
Above-mentioned purpose of the present invention is achieved in that accompanying drawings is as follows:
The anti-hydro-pneumatic spring that leaks is mainly by cylinder barrel seam assembly 8, piston and piston rod seam assembly 9, pilot seal element and damping member are formed, at additional sleeve of master cylinder tube outside seam, the supplementary cap tube inner chamber a formation auxiliary chamber that communicates with master cylinder annular chamber b, its inside is filled with nitrogen, its average working pressure is a little more than the average working pressure of master cylinder tube inside, auxiliary chamber is by being loaded on the hermetic seal element sealing on the cylinder cap 4, piston and piston rod seam assembly 9 are divided into master cylinder cavity of resorption d and master cylinder annular chamber b with the master cylinder tube inner chamber, and by being contained in the seal element sealing in the match of living, piston rod is that hollow forms bar chamber c, bar chamber c is communicated with by the damping member in the match of living with master cylinder cavity of resorption d, on piston and the piston rod seam assembly gas charging valve I1 is housed, on the outer wall of additional sleeve gas charging valve II10 is housed.
Because the hermetic seal link that is loaded on the cylinder cap has the character of dry seal, gas leakage is very little, can keep auxiliary chamber pressure constant for a long time as the ordinary nitrogen spring.Again because the oil seal link both sides pressure reduction that is loaded on the piston is very little, so gas leakage is very little.Therefore, hydro-pneumatic spring of the present invention will have the very long tonifying Qi operation cycle.Because the effective work area in suspension cylinder master working room is much larger than the annular chamber work area, the external characteristics of oil vapour spring is insensitive to the variation in pressure of auxiliary chamber, thereby allow the inflation pressure of auxiliary chamber in a big way, to change, thereby bring great convenience to the tonifying Qi operation.Because piston rod is a hollow, utilize the suspension cylinder inner space fully, thereby the present invention have the characteristics of compact structure and flexible arrangement, is convenient to use on dilly.Its enforcement will generally be applied the necessary technology condition of creating to hydro-pneumatic spring on various vehicles.
Anti-gas leakage measure of the present invention is based upon in the understanding to conventional oil air spring gas leakage mechanism.Suppose to remove additional sleeve, the cylinder cap endoporus is only adorned guide ring and is not adorned seal ring simultaneously, and schematic structure changes the conventional oil air spring into, and this moment, the b chamber was to lead to ambient atmosphere, had very big pressure reduction to be added in the seal ring both sides between the b chamber, d chamber.So the nitrogen on top, c chamber can pass through hydraulic oil to big gas leakage, fundamental cause is that the solubility of nitrogen in hydraulic oil is directly proportional with working pressure approx.Have the oil film of a bed thickness 0.5 μ m to 5 μ m this moment between seal ring and the inner wall of cylinder, because nitrogen molecule is very little, only at the 0.1nm order of magnitude.This layer oil film is a very broad channel to the nitrogen that is dissolved in the oil.Because the high pressure side nitrogen solubility height of sealing strip, the sealing strip low-pressure lateral pressure is not enough to keep very high solubility, must have nitrogen molecule to separate out from oil in low voltage side and enter the b chamber and enter atmosphere again.Because nitrogen molecule density difference in the sealing strip oil film,, just have nitrogen molecule and pass through oil film continuously and enter the b chamber and then enter atmosphere by the molecular diffusion motion.Because there is not such oil film in drying type pure nitrogen gas sealing part,, nitrogen greatly reduces so leaking.This also just pure nitrogen gas spring working pressure can keep constant substantially reason of several years usually.
Description of drawings
Fig. 1 is the example structure schematic representation at the general car design.
Among the figure: 1. gas charging valve I 2. glands 3. dust rings 4. cylinder caps 5. piston rod guide rings 6. gas seal ring 7.O shapes are enclosed 8. cylinder barrel seam assemblies, 9. piston rod seam assemblies, 10. gas charging valve II, 11. piston guide rings, 12. two way sealed rings, 13. one-way sealing rings, 14. nonreturn valve cores, 15. valve bodies, 16. elastic scheibe a. supplementary cap tube inner chamber b. master cylinder annular chamber c. bar chamber d. master cylinder cavity of resorptions
Embodiment
Further specify content of the present invention and working procedure thereof below in conjunction with the accompanying drawing illustrated embodiment.
Because the installation form difference of fore suspension and rear suspension, different vehicle suspension installation forms is different, and the coupling mechanism of hydro-pneumatic spring is not shown among the figure.Be described in further detail below in conjunction with the structure of accompanying drawing novel hydro-pneumatic spring.
Consult Fig. 1, novel hydro-pneumatic spring mainly is made of cylinder barrel seam assembly 8 and piston and 9 two parts of piston rod seam assembly.Cylinder cap 4 is equipped with on cylinder barrel top, said hermetic seal element is: have 4 annular grooves on cylinder cap 4 inner hole walls, dust ring 3, gas seal ring 6 and two piston rod guide rings 5 are housed respectively in it, have two annular grooves on the cylinder cap outer cylinder, respectively adorn 1 O shape circle 7 that is used for the gas static seal.Cylinder cap 4 is by gland 2 axially locating.
Seal element in the said match of living is: also have 4 annular grooves on the outer cylinder of piston, two piston guide rings 11 are housed respectively, two way sealed ring 12 and one-way sealing ring 13.
Damping member in the said match of living is an orifice valve, the valve body 15 of orifice valve is contained in middle of piston, and two longitudinal damping apertures of processing are the normal open hole on the valve body, directly processes 4 damping holes that the aperture is bigger on the piston, nonreturn valve core 14 is equipped with in valve body central authorities, and valve body is by elastic scheibe 16 axially locating.Spool can be steel ball.
This design proposal can form 4 work chamber such as supplementary cap tube inner chamber a, master cylinder annular chamber b, bar chamber c, master cylinder cavity of resorption d and consult figure after overall package.Wherein supplementary cap tube inner chamber a communicates with master cylinder annular chamber b, and c chamber, bar chamber communicates through damping hole with master cylinder cavity of resorption d.When the cartwheel roll lower convex platform or when rolling into pit, the distance of the relative vehicle frame of wheel shaft strengthens, piston rod is overhanging, master cylinder cavity of resorption d volume becomes big pressure and reduces, the high pressure nitrogen on c top, bar chamber is pressed into master cylinder cavity of resorption d with bottom hydraulic oil through orifice valve, and this moment, bar chamber c pressure was higher than master cylinder cavity of resorption d pressure, and steel ball 14 compresses one-way valve port downwards, hydraulic oil two the normal open damping holes of can only flowing through, thereby damping is bigger.When the cartwheel roll convex platform or when rolling out pit, wheel shaft shortens with respect to the distance of vehicle frame, and piston rod is pressed into, master cylinder cavity of resorption d volume diminishes, and pressure raises, and hydraulic oil is pushed steel ball open through valve body center hole and two normal open apertures, flow into bar chamber c through 4 bigger damping holes again, damping is less.Master cylinder annular chamber b volume diminishes when piston rod is overhanging, and wherein part nitrogen is pressed into supplementary cap tube inner chamber a, and air chamber pressure slightly rises.When piston rod was pressed into, it is big that master cylinder annular chamber b volume becomes, and gives master cylinder annular chamber b tonifying Qi by supplementary cap tube inner chamber a chamber, and air chamber pressure slightly descends.
Gas charging valve 1 has been welded on piston and the piston rod seam assembly, be used for bar chamber c, master cylinder cavity of resorption d are done the operation of inflation, oil-filled and exhaust, oil extraction, the gas charging valve 10 that has been welded on the outer wall of additional sleeve is used for supplementary cap tube inner chamber a, master cylinder annular chamber b are done inflation, the operation of venting.
Dress two seals ring on the piston, a two way sealed ring, an one-way sealing ring.Stop master cylinder annular chamber b nitrogen to enter master cylinder cavity of resorption d on the one hand, main is to stop hydraulic oil to infiltrate master cylinder annular chamber b chamber.Thereby the sealing part on the guarantee cylinder cap keeps the character of the dried sealing of making an uproar.
Claims (4)
1. anti-leakage hydro-pneumatic spring is mainly by cylinder barrel seam assembly (8), piston and piston rod seam assembly (9), pilot seal element and damping member are formed, it is characterized in that at additional sleeve of master cylinder tube outside seam, supplementary cap tube inner chamber (a) the formation auxiliary chamber that communicates with master cylinder annular chamber (b), its inside is filled with nitrogen, and by being loaded on the hermetic seal element sealing on the cylinder cap (4), piston and piston rod seam assembly (9) are divided into master cylinder cavity of resorption (d) and master cylinder annular chamber (b) with the master cylinder tube inner chamber, and by being contained in the seal element sealing in the match of living, piston rod is that hollow forms bar chamber (c), bar chamber (c) is communicated with by the damping member in the match of living with master cylinder cavity of resorption (d), on piston and the piston rod seam assembly (9) gas charging valve I (1) is housed, on the outer wall of additional sleeve gas charging valve II (10) is housed.
2. anti-leakage hydro-pneumatic spring according to claim 1, it is characterized in that said hermetic seal element is: on cylinder cap (4) inner hole wall, have 4 annular grooves, dust ring (3), gas seal ring (6) and two piston rod guide rings (5) are housed respectively in it, have two annular grooves on the cylinder cap outer cylinder, respectively adorn 1 O shape circle (7) that is used for the gas static seal.
3. anti-leakage hydro-pneumatic spring according to claim 1, it is characterized in that the seal element in the said match of living is: on the outer cylinder of piston, also have 4 annular grooves, two piston guide rings (11) are housed, two way sealed ring (12) and one-way sealing ring (13) respectively.
4. anti-leakage hydro-pneumatic spring according to claim 1, it is characterized in that the damping member in the said match of living is an orifice valve, the valve body of orifice valve (15) is contained in middle of piston, two longitudinal damping apertures of processing are the normal open hole on the valve body, directly process 4 damping holes that the aperture is bigger on the piston, nonreturn valve core (14) is equipped with in valve body central authorities, and valve body is by elastic scheibe (16) axially locating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410010887 CN1584359A (en) | 2004-05-31 | 2004-05-31 | Leakage-proof oil-gas spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410010887 CN1584359A (en) | 2004-05-31 | 2004-05-31 | Leakage-proof oil-gas spring |
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| CN1584359A true CN1584359A (en) | 2005-02-23 |
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| CN 200410010887 Pending CN1584359A (en) | 2004-05-31 | 2004-05-31 | Leakage-proof oil-gas spring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101032B (en) * | 2006-07-06 | 2010-05-12 | 浙江正裕工业有限公司 | Single-cylinder aerating package process |
| CN102128230A (en) * | 2011-01-14 | 2011-07-20 | 北京理工大学 | Integral three-level damping controlled oil gas spring |
| CN102218644A (en) * | 2011-05-23 | 2011-10-19 | 扬州市明瑞气弹簧有限公司 | Machining process of self-locking air spring |
| CN102476571A (en) * | 2010-11-23 | 2012-05-30 | 高献民 | Automatic variable resistance active suspension frame for automobile |
| CN104676243A (en) * | 2015-03-24 | 2015-06-03 | 隆昌山川精密焊管有限责任公司 | Classified gas-inflating method for gas spring and tool for method |
-
2004
- 2004-05-31 CN CN 200410010887 patent/CN1584359A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101032B (en) * | 2006-07-06 | 2010-05-12 | 浙江正裕工业有限公司 | Single-cylinder aerating package process |
| CN102476571A (en) * | 2010-11-23 | 2012-05-30 | 高献民 | Automatic variable resistance active suspension frame for automobile |
| CN102476571B (en) * | 2010-11-23 | 2014-03-26 | 高献民 | Automatic variable resistance active suspension frame for automobile |
| CN102128230A (en) * | 2011-01-14 | 2011-07-20 | 北京理工大学 | Integral three-level damping controlled oil gas spring |
| CN102128230B (en) * | 2011-01-14 | 2012-07-04 | 北京理工大学 | Integral three-level damping controlled oil gas spring |
| CN102218644A (en) * | 2011-05-23 | 2011-10-19 | 扬州市明瑞气弹簧有限公司 | Machining process of self-locking air spring |
| CN104676243A (en) * | 2015-03-24 | 2015-06-03 | 隆昌山川精密焊管有限责任公司 | Classified gas-inflating method for gas spring and tool for method |
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