CN203348408U - Oil damper with compensation airbag - Google Patents

Oil damper with compensation airbag Download PDF

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Publication number
CN203348408U
CN203348408U CN 201320347377 CN201320347377U CN203348408U CN 203348408 U CN203348408 U CN 203348408U CN 201320347377 CN201320347377 CN 201320347377 CN 201320347377 U CN201320347377 U CN 201320347377U CN 203348408 U CN203348408 U CN 203348408U
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CN
China
Prior art keywords
oil
cylinder
pressure
compensation
pressure cylinder
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Application number
CN 201320347377
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Chinese (zh)
Inventor
赵平
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青岛阿尔斯通铁路设备有限公司
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Priority to CN 201320347377 priority Critical patent/CN203348408U/en
Application granted granted Critical
Publication of CN203348408U publication Critical patent/CN203348408U/en

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Abstract

The utility model provides an oil damper with compensation airbags, and belongs to the technical field of machinery. The oil damper with the compensation airbags solves the problems that an existing oil damper is prone to causing the cavitation phenomenon, and then influences stability of a damping function and the service life of equipment. The oil damper with the compensation airbags comprises a pressure cylinder in the middle and an oil storage cylinder wraps the periphery of the pressure cylinder. The pressure cylinder is communicated with the oil storage cylinder through a bottom valve arranged at the bottom, a guide cover is arranged at the ports of the pressure cylinder and the oil storage cylinder in a sealed mode, a piston rod penetrates through the pressure cylinder, the piston rod is fixedly connected with a piston, a damping valve and a spring are arranged on the piston, and the compensation airbags are symmetrically arranged on the outer peripheral wall of the pressure cylinder. According to the oil damper with the compensation airbags, the cavitation phenomenon is avoided, the stabilization effect of gas phase compensation and damping is achieved, the volume of stretch or compression of the piston rod can be compensated, oil leakage of the cylinder body is compensated, and therefore the stable, reliable and effective damping effect is ensured on the condition that the whole structure is simple and reasonable.

Description

Oil-pressure damper with compensation air bag

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of oil pressure dampening apparatus, particularly a kind of oil-pressure damper with compensation air bag.

Background technique

Oil-pressure damper in working order the time, piston rod can be in oil cylinder inner tensile or compression, because oily characteristic is compressible hardly, therefore when piston rod is compressed to oil-pressure damper inside, can produce very large pressure, thereby make seal failure, cause damping capacity decline, unstable, even completely lose vibration-damping function.

In order to solve this situation, existing oil-pressure damper inside all can be inputted inert gas or increase an oil bag, in this oil bag, has air to be compressed.But this design easily causes fluid and air to merge mutually, cause " air pocket " phenomenon, thereby make oil-pressure damper that the damping force sudden change occur in running, affect vibration damper and keep stable damping characteristic, reduce effectiveness in vibration suppression and life of equipment.

The model utility content

The purpose of this utility model is to have the problems referred to above for existing technology, propose a kind of compensation air bag of special construction, overcome " air pocket " phenomenon, can avoid vibration damping to lose efficacy, can compensate oil leakage loss again, thereby promote the oil-pressure damper with compensation air bag of vibration damping quality and reliability.

The purpose of this utility model can realize by following technical proposal: the oil-pressure damper with compensation air bag, comprise be positioned at the middle part pressure cylinder and peripheral ring around oil storage cylinder, it is characterized in that, described pressure cylinder is communicated with by the bottom valve that is arranged at bottom with oil storage cylinder, the port envelope of described pressure cylinder and oil storage cylinder is established guide cover, and wear piston rod in pressure cylinder, described piston rod is connected mutually with piston, orifice valve and spring are arranged on described piston, and the periphery wall place of described pressure cylinder is symmetrical arranged the compensation air bag.

Originally have in compensation air bag oil-pressure damper the combination that is nested of pressure cylinder and oil storage cylinder, through fixing of guide cover and large locking nut, formation has the oil pressure damping body of damping effect.Wherein bottom valve plays pressure cylinder and oil storage cylinder fluid exchange interaction each other; Guiding is built piston rod guiding and seal action; Reach desired damping characteristic by adjusting orifice valve and both different parameters of spring; The compensation air bag is positioned at the pressure cylinder outside, and compensating action is played in increase and the minimizing long-pending for oil outer liquid.

In the above-mentioned oil-pressure damper with compensation air bag, described compensation air bag comprises the sebific duct of filling air, the two ends of described sebific duct are the plate body, and the two ends up and down of described pressure cylinder are sheathed support ring all, and the plate body at described sebific duct two ends is positioned on the respective support ring by strapping strand.Sebific duct is axially placed along pressure cylinder, and it is covered on the outer wall place of pressure cylinder and is positioned at oil storage cylinder inside, and sebific duct adopts natural rubber to make, and has oil resistant erosion property.Volume of air in sebific duct is by the quantitative values of reasonable computation gained.Support ring adopts metal to make, and when assembling, sebific duct is carried out to the supporting and location effect.Strapping strand adopts metal to make, and it is tightened fixing to sebific duct.

In the above-mentioned oil-pressure damper with compensation air bag, offer the path that is communicated with oil storage cylinder both sides cavity volume on described guide cover.

In the above-mentioned oil-pressure damper with compensation air bag, be embedded Sealing between described guide cover and piston rod, described piston rod forms mutually closely connected being slidably connected with Sealing.

In the above-mentioned oil-pressure damper with compensation air bag, the sheathed dust-proof cover in the port of described pressure cylinder and oil storage cylinder.The sheathed dust-proof cover in the outside of guide cover, in case it is exposed in the external world, easily by dust fall or wind erosion, and then cause seal to descend.

Compared with prior art, originally there is the oil-pressure damper of compensation air bag because compression uses aeroseal in sebific duct, thereby air-isolation contacts with hydraulic oil, has avoided " air pocket " phenomenon, realizes the stablizing effect of gas phase compensation vibration damping; Can the volume of piston rod stretching or compression be compensated in addition; Also to cylinder body, leakage of oil compensates, and under the condition of overall structure advantages of simple, ensures stable, reliable, effective damping effect thus.

The accompanying drawing explanation

Fig. 1 is the sectional structure schematic diagram that originally has the oil-pressure damper of compensation air bag.

In figure, 1, pressure cylinder; 2, oil storage cylinder; 3, guide cover; 4, piston rod; 5, piston; 6, orifice valve; 7, bottom valve; 8, sebific duct; 9, support ring; 10, strapping strand; 11, dust-proof cover.

Embodiment

Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As shown in Figure 1, originally there is the oil-pressure damper that compensates air bag and comprise pressure cylinder 1, oil storage cylinder 2, dust-proof cover 11, guide cover 3, piston rod 4, piston 5, orifice valve 6, bottom valve 7, sebific duct 8; Compensation air bag etc.

The oil storage cylinder unit mainly is comprised of oil storage cylinder 2, pressure cylinder 1, compensation air bag, bottom valve 7.Bottom valve 7 is positioned at oil storage cylinder 2 bottoms, and its upper end is unilaterally connected pressure cylinder 1, and the outer wall place that is covered on pressure cylinder 1 is symmetrical set two compensation air bags, and two compensation air bag relative positions set firmly, and its length is along the axial stretching, extension of circle cylinder body.

The dust-proof cover unit is comprised of dust-proof cover 11, piston rod 4, guide cover 3, piston 5 etc., and there is the orifice valve 6 of circulation fluid piston 5 upper and lower end faces, and the different size by the damping adjusting hole, can produce different damping constants.Guide cover 3 inside have black box, guarantee that the fluid of pressure cylinder 1 and oil storage cylinder 2 inside can not overflow.

The dust-proof cover unit is connected by large locking nut with the oil storage cylinder unit, dust-proof cover 11 upper ends are connected with car body with oil storage cylinder 2 lower ends, the motion of car body drives piston rod 4 and moves up and down in pressure cylinder 1 inside, thereby drive piston by transmission of power, in pressure cylinder 1 inside, moves up and down.

The compensation air bag comprises the sebific duct 8 of filling air, and the volume of air in sebific duct 8 is by the quantitative values of reasonable computation gained.The two ends up and down of pressure cylinder 1 are sheathed support ring 9 all, and the two ends of sebific duct 8 are the plate body, and the plate body at two ends is positioned on respective support ring 9 by strapping strand 10.Sebific duct 8 adopts natural rubber to make, and has oil resistant erosion property.Support ring 9 all adopts metal to make with strapping strand 10.

The sheathed bellows of outer circumferential side and the dust-proof cover 11 of guide cover 3 and piston rod 4 working portions, bellows prevents that tiny micronic dust dirt etc. from entering into sealed inside; Dust-proof cover 11 outsides are that metal is made, and can prevent the shock of vibration damper stone etc. when vehicle speed is very fast.

When oil-pressure damper is assembled, piston 5 is at the top of pressure cylinder 1, and now the volume of piston rod 4 does not enter into pressure cylinder 1 inside, and the internal pressure of compensation air bag is consistent with atmospheric pressure.When oil-pressure damper, in working order the time, now piston 5 is positioned at the middle arbitrary position of pressure cylinder 1, and piston rod 4 enters into pressure cylinder 1 inside.Incompressibility due to hydraulic oil, pressure cylinder 1 internal pressure increases, fluid will spill into oil storage cylinder 2 by recuperation valve in pressure cylinder 1, while is due to the incompressibility of outer cavity pressure increase and hydraulic oil, so the air in sebific duct 8 is compressed, therefore the compensation air bag is in the time of working position, its inside is all the time in pressured state.

Under the oil-pressure damper working state, when piston rod 4 upwards stretches, because piston rod 4 reduces at pressure cylinder 1 internal volume, pressure cylinder 1 internal pressure can reduce thereupon, and fluid will enter into from the hole, border of recuperation valve pressure cylinder 1 inside; Synchronously the fluid due to oil storage cylinder 2 reduces, and sebific duct 8 pressurizeds reduce its internal volume and expand, and compensation is because fluid in oil storage cylinder 2 reduces the vacuum formed.In like manner, when piston rod 4 during to lower compression, more piston rod 4 volumes enter into pressure cylinder 1 inside, pressure cylinder 1 internal pressure is increased, fluid can flow to by the mesopore of recuperation valve oil storage cylinder 2 inside, thereby oil storage cylinder 2 internal pressures increase, and sebific duct 8 inner airs are compressed, compensating thus fluid increases and the space of minimizing.

Compensate in addition air bag the leakage of oil-pressure damper is also had to certain compensating action.When oil-pressure damper produces leakage of oil, the inner fluid volume of vibration damper will reduce, oil-pressure damper is in working order the time, sebific duct 8 is in a pressured state always, the minimizing of fluid reduces oil storage cylinder 2 internal pressures, sebific duct 8 will produce expansion, the vacuum that the loss of compensation fluid produces, thus make the oil-pressure damper performance parameter remain on eligible state.

Finally, due to the seal action of sebific duct 8 to air in it, air can not mixed with fluid, can not produce " air pocket " phenomenon, the damping force of oil-pressure damper can not produce sudden change, therefore kept the lasting effectiveness of oil-pressure damper.

Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Although this paper has more been used pressure cylinder 1; Oil storage cylinder 2; Guide cover 3; Piston rod 4; Piston 5; Orifice valve 6; Bottom valve 7; Sebific duct 8; Support ring 9; Strapping strand 10; Dust-proof cover 11 terms such as grade, but do not get rid of the possibility of using other term.Using these terms is only in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.

Claims (5)

1. the oil-pressure damper that there is the compensation air bag, comprise be positioned at the middle part pressure cylinder and peripheral ring around oil storage cylinder, it is characterized in that, described pressure cylinder is communicated with by the bottom valve that is arranged at bottom with oil storage cylinder, the port envelope of described pressure cylinder and oil storage cylinder is established guide cover, and wears piston rod in pressure cylinder, and described piston rod is connected mutually with piston, orifice valve and spring are arranged on described piston, and the periphery wall place of described pressure cylinder is symmetrical arranged the compensation air bag.
According to claim 1 have the compensation air bag oil-pressure damper, it is characterized in that, described compensation air bag comprises the sebific duct of filling air, the two ends of described sebific duct are the plate body, the two ends up and down of described pressure cylinder are sheathed support ring all, and the plate body at described sebific duct two ends is positioned on the respective support ring by strapping strand.
3. the oil-pressure damper with compensation air bag according to claim 1, is characterized in that, offers the path that is communicated with oil storage cylinder both sides cavity volume on described guide cover.
4. the oil-pressure damper with compensation air bag according to claim 1, is characterized in that, between described guide cover and piston rod, is embedded Sealing, and described piston rod forms mutually closely connected being slidably connected with Sealing.
5. according to the described oil-pressure damper with compensation air bag of any one in claim 1 to 4, it is characterized in that the sheathed dust-proof cover in the port of described pressure cylinder and oil storage cylinder.
CN 201320347377 2013-06-18 2013-06-18 Oil damper with compensation airbag CN203348408U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320347377 CN203348408U (en) 2013-06-18 2013-06-18 Oil damper with compensation airbag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320347377 CN203348408U (en) 2013-06-18 2013-06-18 Oil damper with compensation airbag

Publications (1)

Publication Number Publication Date
CN203348408U true CN203348408U (en) 2013-12-18

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Family Applications (1)

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CN 201320347377 CN203348408U (en) 2013-06-18 2013-06-18 Oil damper with compensation airbag

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Country Link
CN (1) CN203348408U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883586A (en) * 2014-01-07 2014-06-25 江苏大洋精锻有限公司 Dustproof device for oil cylinder
CN103883661A (en) * 2014-03-13 2014-06-25 江苏大学 Slide valve type variable-damping shock absorber matched with air spring and working method thereof
CN104047987A (en) * 2014-06-18 2014-09-17 江苏大学 Novel hydro-pneumatic spring
CN106523571A (en) * 2016-12-30 2017-03-22 珠海市业成轨道交通设备科技有限公司 Oil-pressure gasbag shock absorber system for high-speed motor car

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883586A (en) * 2014-01-07 2014-06-25 江苏大洋精锻有限公司 Dustproof device for oil cylinder
CN103883661A (en) * 2014-03-13 2014-06-25 江苏大学 Slide valve type variable-damping shock absorber matched with air spring and working method thereof
CN103883661B (en) * 2014-03-13 2016-03-02 江苏大学 A kind of variable vibration damper of sliding valve style damping and method of work coordinating pneumatic spring
CN104047987A (en) * 2014-06-18 2014-09-17 江苏大学 Novel hydro-pneumatic spring
CN104047987B (en) * 2014-06-18 2016-03-02 江苏大学 A kind of Novel oil gas spring
CN106523571A (en) * 2016-12-30 2017-03-22 珠海市业成轨道交通设备科技有限公司 Oil-pressure gasbag shock absorber system for high-speed motor car

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