CN204113991U - Liquid and gas damper - Google Patents
Liquid and gas damper Download PDFInfo
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- CN204113991U CN204113991U CN201420426116.7U CN201420426116U CN204113991U CN 204113991 U CN204113991 U CN 204113991U CN 201420426116 U CN201420426116 U CN 201420426116U CN 204113991 U CN204113991 U CN 204113991U
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Abstract
The utility model provides a kind of Liquid and gas damper.This Liquid and gas damper comprises cylinder barrel and plunger, and both have the tubular structure that the axial direction along buffer extends, plunger puts in from the open end of cylinder barrel and can slide relative to this cylinder barrel along this axial direction in cylinder barrel.The plug extended along this axial direction from the closed end of this cylinder barrel is set in cylinder barrel.The piston that the axial direction along buffer slides relative to plunger is provided with in plunger, plunger comprises plug in one end of the closed end near cylinder barrel, the passage being communicated with inner cavity of cylinder and plunger cavity is set in plug, at this passage, floating slider is set near the side of plunger cavity, to form one-level damping gap between plug and floating slider.Plug is inlet passage after buffer compression predetermined stroke, to form secondary damping gap between plug and passage.This Liquid and gas damper simple installation, life-span reliably, and can meet the performance requirement under underloading and case of heavy load simultaneously.
Description
Technical field
The utility model relates to a kind of Liquid and gas damper.
Background technique
The coupler and draft gear of EMU is used to the parts connecting each vehicle in train, and being one of large parts of composition vehicle five, is also the most most important parts.It is used for connecting train each vehicle, realizes the room machine of vehicle, electrically and the connection of gas circuit, and transmits and alleviate train and be in operation or the longitudinal force that produces when shunting or impact force, and to absorb various impact energy, protection vehicle also reduces noise.
In China, on hitch, widely used buffer belongs to the Liquid and gas damper of import mostly.Along with quick, heavily loaded development, urban rail transit vehicles start and in speed-change process longitudinal direction to add (subtracting) speed larger, require higher to vehicle comfort level, buffer is had higher requirement, the passenger vehicle coupler and draft gear of conventional construction hangs together that gap is comparatively large, automaticity is lower, can not meet its usage requirement, and it is poor to the applicability of environment, these have become the key issue of restriction China railways to speed-raising future development.Therefore, need a kind of simple installation, life-span reliable and the Liquid and gas damper of the new structure of performance requirement under simultaneously can meeting underloading and case of heavy load.
Model utility content
The utility model provides a kind of Liquid and gas damper of new structure, and it can meet the performance requirement under high speed, low speed and heavily loaded high-speed case simultaneously.In addition, difficulty of processing and cost can be reduced according to Liquid and gas damper of the present utility model, simplify mounting structure and the sealing configuration of buffer, and the life-span be reliable.
According to embodiment of the present utility model, provide a kind of Liquid and gas damper, comprise: cylinder barrel, it has the tubular structure that the axial direction along described Liquid and gas damper extends, one end of described cylinder barrel is closed end, the other end is open end, and in described cylinder barrel, arrange the plug extended along described axial direction from the closed end of described cylinder barrel; Plunger, it can slide along described axial direction relative to described cylinder barrel in described cylinder barrel, described plunger comprises plug in one end of the closed end near described cylinder barrel and closes at one end place of the closed end away from described cylinder barrel, described plunger and described cylinder barrel are sealed and matched, thus define the first liquid chamber for filling liquid hydraulic fluid; And piston, it is being arranged in described plunger relative to the mode that described plunger slides along described axial direction, described piston coordinates with described plunger seal, thus the chamber in described plunger is divided into the second liquid chamber of being positioned at described plug side and is positioned at the air chamber being used for blanketing gas with the described second relative side of liquid chamber.The feature of this Liquid and gas damper is, first passage for being communicated with described first liquid chamber and described second liquid chamber is set in described plug, in the side of close described second liquid chamber of described first passage, floating slider is set, one-level damping gap is formed between described floating slider and described plug, described floating slider can slide relative to described plug, thus change the size in described one-level damping gap, and described plug enters described passage after described Liquid and gas damper is compressed predetermined stroke, thus between described plug and described passage, form secondary damping gap.
According to preferred embodiment of the present utility model, described plug also comprises the return flow line being directly or indirectly communicated with described first liquid chamber and described second liquid chamber, described return flow line comprises reflux valve, and described reflux valve only allows hydraulic fluid from described second liquid chamber to the one-way valve of described first liquid chamber flowing.
According to preferred embodiment of the present utility model, described return flow line also comprises the normally closed safety valve in parallel with described reflux valve, when the pressure in described first liquid chamber is greater than predetermined safety pressure value, described safety valve is opened to allow hydraulic fluid to be flowed to described second liquid chamber by described first liquid chamber by described safety valve.
According to preferred embodiment of the present utility model, described safety valve and described reflux valve form as one.
According to preferred embodiment of the present utility model, described return flow line branch is connected to described first passage.
According to preferred embodiment of the present utility model, described reflux valve is installed to described floating slider.
According to preferred embodiment of the present utility model, described reflux valve and described floating slider form as one.
According to preferred embodiment of the present utility model, the initial position regulator of the initial value of the size for guaranteeing described one-level damping gap is set between described plug and described floating slider.
According to preferred embodiment of the present utility model, described initial position regulator comprises the sealed cavity be arranged between described plug and described floating slider, is filled with the gas of predetermined pressure in described sealed cavity.
According to preferred embodiment of the present utility model, described plug also comprises gas charging valve, is filled with described gas by described gas charging valve to described sealed cavity.
According to preferred embodiment of the present utility model, described initial position regulator comprises the spring assembly be arranged between described plug and described floating slider.
According to preferred embodiment of the present utility model, described initial position regulator comprises the memory foam material be arranged between described plug and described floating slider.
According to preferred embodiment of the present utility model, also the parts that are sealed and matched are provided with between described plunger and described cylinder barrel, described plunger arranges relief hole relative to the described parts that are sealed and matched near the side of the closed end of described cylinder barrel, and reflux before making the parts that are sealed and matched of hydraulic fluid between the described cylinder barrel of arrival and described plunger described second liquid chamber.
According to preferred embodiment of the present utility model, one end of the closed end away from described cylinder barrel of described plunger is sealed by air chamber end socket and cover of plunger, the gas charging valve be used for described chamber inflated is set in described air chamber end socket, and static seal system is set in described cover of plunger.
According to preferred embodiment of the present utility model, described reflux valve has steel ball structure, described steel ball structure comprises backflow valve pocket, the fixed plate be arranged in described backflow valve pocket, the ball holder arranged through described fixed plate, the steel ball that is arranged on the spring described fixed plate and described ball holder and is seated in described ball holder, wherein multiple hole is set on described fixed plate and described ball holder, thus the damping force that reduction hydraulic fluid is subject to when described second liquid chamber flows back to described first liquid chamber.
Therefore, the Liquid and gas damper of a kind of new structure that the utility model provides, owing to defining one-level damping gap between plug and floating slider, and plug with define secondary damping gap between the passage being communicated with the first liquid chamber and the second liquid chamber, therefore, it is possible to meet at a high speed simultaneously, performance requirement in low speed and high-speed overload situation.In addition, difficulty of processing and cost can be reduced according to Liquid and gas damper of the present utility model, simplify mounting structure and the sealing configuration of buffer, and the life-span be reliable.
Accompanying drawing explanation
Fig. 1 shows the sectional view of the Liquid and gas damper according to embodiment of the present utility model.
Fig. 2 shows the sectional view according to one-level damping gap of the present utility model in a schematic way.
Fig. 3 shows the sectional view being arranged on the gas charging valve in plug according to embodiment of the present utility model.
Fig. 4 shows the sectional view being arranged on the spring assembly between plug and floating slider according to embodiment of the present utility model.
Fig. 5 shows the sectional view being arranged on filling memory foam material between plug and floating slider according to embodiment of the present utility model.
Fig. 6 shows the sectional view with the one-way valve of steel ball structure according to embodiment of the present utility model.
Fig. 7 shows the structural drawing according to the fixed plate in the one-way valve of embodiment of the present utility model.
Fig. 8 shows the structural drawing according to the ball holder in the one-way valve of embodiment of the present utility model.
Fig. 9 shows the sectional view of the safety valve in parallel with reflux valve according to embodiment of the present utility model.
Embodiment
Fig. 1 shows the sectional view of the Liquid and gas damper 100 according to embodiment of the present utility model.As shown in Figure 1, according to the Liquid and gas damper 100 of embodiment of the present utility model primarily of compositions such as plug 1, cylinder barrel 2, floating slider 9, plunger 12 and pistons 17.
As shown in Figure 1, cylinder barrel 2 has the tubular structure that the axial direction (dot and dash line see in Fig. 1) along Liquid and gas damper 100 extends, and one end of cylinder barrel 2 is open end, and the other end is closed end.Plug 1 is arranged in cylinder barrel 2, and extends along the axial direction of Liquid and gas damper 100 from the closed end of cylinder barrel 2.
Within plunger 12 reaches cylinder barrel 2 from the open end of cylinder barrel 2, and when Liquid and gas damper 100 works, plunger 12 can slide along the axial direction of Liquid and gas damper 100 relative to cylinder barrel 2 in cylinder barrel 2.The internal diameter of cylinder barrel 2 conforms to roughly each other with the external diameter of plunger 12, and the outer surface of the internal surface of cylinder barrel 2 and plunger 12 is by being sealed and matched as the sealing guidance system 13 of the part that is sealed and matched, and therefore defines the first liquid chamber 3 for filling liquid hydraulic fluid between cylinder barrel 2 and plunger 12.Plunger 12 comprises plug 4 in the one end near cylinder barrel 2 closed end, and closes at one end place away from cylinder barrel 2 closed end of plunger 12.Plug 4 has been provided with the piston ring 5 of guiding and decompression.In addition, as shown in Figures 1 and 2, between cylinder barrel 2 and plunger 12, be formed with the sealing guidance system 13 as sealing fit portion.Under high pressure enter sealing guidance system 13 in order to avoid hydraulic oil and make to seal the life-span that guidance system is subject to high pressure destroying infection Liquid and gas damper 100, plunger 12 relative to sealing guidance system near one end of cylinder barrel 2 closed end, relief hole 11 is set, thus make hydraulic oil be subject to High Pressure arrive sealing guidance system 13 before be back in the second liquid chamber 15.
Piston 17 is arranged in plunger 12, and can slide along the axis of Liquid and gas damper 100 relative to plunger 12.The internal diameter of plunger 12 conforms to roughly each other with the external diameter of piston 17, and the outer surface of the internal surface of plunger 12 and piston 17 is by being sealed and matched as the piston seal guidance system 16 of the part that is sealed and matched, therefore the space in plunger 12 is divided into the second liquid chamber 15 of being positioned at plug side and is positioned at the air chamber 18 being used for blanketing gas with the second relative side of liquid chamber 15 by piston 17.One end away from cylinder barrel 2 closed end of plunger 12 (that is, air chamber 18) can be closed by air chamber end socket 19, and can be closed by cover of plunger 21 further.Air chamber end socket 19 can arrange the gas charging valve regulating air chamber 18 internal air pressure, for setting up the initial pressure of Liquid and gas damper 100.This gas charging valve can according to the pressure in the different installation requirement adjustment air chambers 18 of Liquid and gas damper 100.Known with reference to the working procedure that will be explained below, the performance of initial gas pressure to Liquid and gas damper has a certain impact, so can realize the performance requirement in certain limit by change initial gas pressure.In addition, can also static seal system 20 (such as seal ring) be set on cover of plunger 21, thus when 19 seal failure of air chamber end socket, guarantee that this Liquid and gas damper 100 still can normally work, and then ensure and extend working life of Liquid and gas damper 100.
In plug 4, the first passage for being communicated with the first liquid chamber 3 and the second liquid chamber 15 is also set, floating slider 9 is set in the side near the second liquid chamber 15 of this first passage.Be formed with one-level damping clearance between floating slider 9 and plug 4, and floating slider 9 can slide relative to plug 4, thus make this one-level damping clearance variable.In addition, the opposite side of first passage is aimed at plug 1, and has the size allowing plug 1 to insert.
Be described to the working procedure of Liquid and gas damper 100 below.The working procedure of Liquid and gas damper 100 comprises compression process and extension process, specific as follows:
1. compression process
When being subject to percussion, plunger 12 accelerates to extend in cylinder barrel 2, axial direction along Liquid and gas damper 100 under the effect of the now hydraulic oil of floating slider 9 in the first liquid chamber 3 slides relative to plug 4, the size in the one-level damping gap between inclined-plane 22 as shown in Figure 2 and inclined-plane 23 is made to become greatly, hydraulic oil arrow direction as shown in Figure 2 under pressure.At low speeds, because flow is little, floating slider 9 goes out suitable damping gap relative to plug 4 according to physical dimension relation self adaption, to provide the force value of the damping under low-speed situations.At high speeds, the hydraulic oil in the first liquid chamber 3 promotes the maximum value in floating slider 9 to one-level damping gap instantaneously, and namely floating slider 9 moves to extreme right position, and the one-level damping gap now formed between plug 4 and reflux valve 14 is maximum.Hydraulic oil in first liquid chamber 3, through flowing to the second liquid chamber 15 along first passage one-level damping gap, then flows into the gas in hydraulic oil promotion piston 17 compression air chamber 18 of the second liquid chamber 15, increases the pressure in air chamber 18.Then, after Liquid and gas damper 100 compresses predetermined stroke, plug 1 enters the first passage of connection first liquid chamber 3 in plug 4 and the second liquid chamber 15, now between plug 1 and first passage, form secondary damping gap, hydraulic oil in first liquid chamber 3 flows to the second liquid chamber 15 through secondary damping gap and one-level damping gap, and the damping of Liquid and gas damper 100 entirety is increased further.When plunger 12 is zero with the relative velocity of cylinder barrel 2, compression process terminates.By aforesaid compression process, the damping force that secondary damping gap and/or one-level damping gap produce will absorb the impact energy of considerable part; Further, the gas in air chamber 18 is compressed, thus makes the GAS ABSORPTION in air chamber 18 and store impact energy.Therefore, impact is eased.
2. uphold process
When Liquid and gas damper 100 is compressed at utmost as previously mentioned, the energy demand release of atmosphere storage, thus generation forces plunger 12 to get back to the active force of original position, and Liquid and gas damper 100 is upheld.The extension of Liquid and gas damper 100 promotes piston 17 and the hydraulic oil in second liquid chamber 15 is pushed back the first liquid chamber 3.Specifically, hydraulic oil is flowed back in the first liquid chamber 3 by the secondary damping gap between the passage in the one-level damping gap between floating slider 9 and plug 12 and plug 1 and plug 12, and plunger 12 also moves to the direction stretching out cylinder barrel 2 further thereupon.Along with plunger 12 moves predetermined stroke, plug 1 leaves first passage.Whole process and compression process are substantially contrary, until Liquid and gas damper 100 is returned to initial position, now floating slider also returns to initial position.
Preferably, in order to make Liquid and gas damper 100 relatively be returned to initial position rapidly, return flow line can also be set in plug.Specifically, with reference to Fig. 1, plug is also provided with reflux valve 14, and reflux valve 14 is installed to floating slider 9, thus forms the return flow line that branch is communicated to first passage.As shown in Figure 6, reflux valve 14 is one-way valves, and this one-way valve only allows hydraulic oil to flow from the second liquid chamber 15 to the first liquid chamber 3.When Liquid and gas damper 100 is in compression process, be now zone of high pressure in the first liquid chamber 3, close under the pressure effect of the hydraulic oil of reflux valve 14 in the first liquid chamber 3, the hydraulic oil in the first liquid chamber 3 flows into the second liquid chamber 15 by means of only first passage.When Liquid and gas damper 100 is in extension process, reflux valve 14 is opened under the pressure effect of the hydraulic oil of the second liquid chamber 15, and the hydraulic oil in the second liquid chamber 15 flows back to rapidly the first liquid chamber 3 by return flow line.
As Fig. 6 to Fig. 8 shows a kind of example arrangement of reflux valve 14, reflux valve 14 has steel ball structure, this steel ball structure by the valve pocket 25 that refluxes, fixed plate 26, the ball holder 28 arranged through fixed plate 26 be arranged in backflow valve pocket 25, be arranged on the spring 27 fixed plate 26 and ball holder 28 and the steel ball 29 etc. be seated in ball holder 28 forms.When hydraulic oil flows to the second liquid chamber 15 from the first liquid chamber 3, be seated in steel ball 29 in ball holder 28 under the effect of hydraulic oil with the through hole close contact of backflow valve pocket 25, therefore reflux valve 14 cuts out; When hydraulic oil flows back to the first liquid chamber 3 from the second liquid chamber 15, hydraulic oil promotes steel ball 29 Compress Spring 27, and therefore steel ball 29 leaves the through hole of backflow valve pocket 25, and reflux valve 14 is opened.Preferably, fixed plate 26 and ball holder 28 are provided with multiple hole, thus when Liquid and gas damper 100 enters extension process, the damping force be subject to when the hydraulic oil reduced in the second liquid chamber 15 flow back into the first liquid chamber.This structure ensure that Liquid and gas damper can Quick-return, and restoring force is little, it is large to absorb energy.
Foregoing Liquid and gas damper of the present utility model at least has the following advantages:
1. Liquid and gas damper of the present utility model has two-stage buffer function.At the Liquid and gas damper compression initial stage, damping force produces mainly through the one-level damping gap between plug 4 and floating slider 9 or reflux valve 14.Specifically, at low speeds, floating slider when Liquid and gas damper moves at the beginning, can go out damping gap according to physical dimension proportionate relationship self adaption, meets the performance requirement under low-speed situations; At high speeds, the high pressure oil in moment the first liquid chamber promotes floating slider to the maximum value of damping slit design, and now to form the annulus formed between 14 maximum for plug 4 and scavenger valve, to meet the performance requirement under high-speed case; After Liquid and gas damper compression predetermined stroke, plug 1 enters the first passage for being communicated with the first liquid chamber 3 and the second liquid chamber 15 in plug 4, and form secondary damping gap, this is generally used for high-speed overload situation.Therefore, compared with Liquid and gas damper of the prior art, Liquid and gas damper of the present utility model can meet the performance requirement in low speed, high speed and high-speed overload situation simultaneously.
2. Liquid and gas damper of the present utility model arranges and only allows hydraulic oil to flow into the one-way valve of the first liquid chamber from the second liquid chamber in the passage of connection first liquid chamber and the second liquid chamber.Therefore, compared with Liquid and gas damper of the prior art, Liquid and gas damper of the present utility model is replied fast, and restoring force is little, it is large to absorb energy.
As previously mentioned, although be illustrated exemplary embodiment of the present utility model with reference to accompanying drawing in illustrating, the utility model is not limited to above-mentioned each embodiment, can also have other way of example many.
Such as, in the aforementioned embodiment, return flow line is connected to first passage.But return flow line can be independent mutually with first passage.That is, in plug, additionally can arrange one be communicated with the first liquid chamber and the second liquid chamber and the passage being provided with one-way valve (reflux valve) is used as return flow line.
Such as, in the aforementioned embodiment, reflux valve 14 is installed to floating slider 9.But reflux valve 14 also can form as one with floating slider 9 machinery type or be processed into integrative-structure.
Such as, in the aforementioned embodiment, one-way valve has steel ball structure, but one-way valve can adopt various different modes as known in the art.Such as: 1, cone valve type, spool is opened because of the pressure by working fluid, and when liquid reverse flow, reverse fluid pressure makes spool tightly contact with the conical surface of valve seat, and now spool is closed; 2, rise-fall type, when flow of fluid, flap liquid body pressure and opening, when liquid reverse flow, flap is because of its deadweight and suffered reverse fluid pressure, closely sealed and close with the sealing surface of valve seat; 3, rotary-open type, liquid is straight-through in valve body, relies on pressure to back down the rotation flap of side, and after pressure loses, flap relies on deadweight return, and reverse fluid pressure closes flap.
Previous embodiment provides the embodiment that return flow line comprises reflux valve, but return flow line can also comprise the safety valve in parallel with reflux valve.Fig. 9 shows the safety valve in parallel with reflux valve, and wherein valve B is foregoing reflux valve, and valve A is normally closed safety valve.Within pressure in the first liquid chamber is not more than the safety range of safety pressure value, valve A is in closed condition; When the pressure in the first liquid chamber is greater than the safety pressure value that Liquid and gas damper specifies, valve A is opened, and passes through valve A flowed to the second liquid chamber by the first liquid chamber to allow fluid, reduces the pressure of Liquid and gas damper inside.In the embodiment shown in fig. 9, safety valve A and reflux valve B forms as one, but both also can be formed discretely.
In addition, due to the determining positions size in one-level damping gap of floating slider 9, therefore the initial value controlling device of the initial value of the size for guaranteeing one-level damping gap can also be set between plug 4 and floating slider 9.In one embodiment, as shown in Figures 1 and 3, between plug 4 and floating slider 9, form sealed cavity 6, in sealed cavity 6, be filled with the gas of predetermined pressure.When the gas sealed in sealed cavity 6 can not meet designing requirement or the job requirement of Liquid and gas damper 100, in the case, gas charging valve can also be set in plug 4, to inflate sealed cavity 6.In addition, as shown in Figure 4, spring assembly 30 can be set between plug 4 and floating slider 9 to replace or to be additional to sealed cavity 6, in order to guarantee the initial value of the size in one-level damping gap.In addition, as shown in Figure 5, can also arrange between plug 4 and floating slider 9 and remember foam material 31 to replace or to be additional to sealed cavity 6 and/or spring assembly 30.This material has multiple separated foam structure, in order to set up certain initial precompression, and preferably has the characteristics such as resistance to combustion, oil resistant, resistance to chemical attack.
In addition, plug 1 can design the modes such as different taperings, aperture, fluting as the case may be, and the mechanical property of adjustment buffer in compression or extension process, with the requirement of satisfied different applying working condition.Plug 1 can be solid cone shaped plug, and its adjustment of change by tapering damping characteristic can be the fit system of many taperings.Plug 1 also can be conic mandrel bar, its tapering can change by the axis as required and along plug, thus the tapering of plug is more freely set, damping characteristic when plug is in diverse location relative to plug can be changed, to realize different impact property requirements.Plug 1 can also be solid cylindrical plug, and the outer surface of cylindrical plug forms groove, by determining that the shape of groove controls the damping characteristic in damping gap along axis.Plug 1 also can be hollow cylinder shaped plug, this drum plug is closed at one end place of the closed end close to cylinder barrel and open at the other end place, and by forming through hole on plug, by determining that the size of through hole and arrangement mode etc. control the damping characteristic in one-level damping gap.On this basis, those skilled in the art can need to carry out various design to the structure of plug according to actual design, and the various structures of plug can be bonded to each other arbitrarily.In addition, the shape of passage and size also can be used for adjusting damping characteristic.Further, passage and plug arbitrarily combinedly can adjust damping characteristic.
In addition, as shown in Figure 1, the cylinder barrel 2 according to embodiment of the present utility model is integral type structure, but as one of ordinary skill in the understanding, require and processing cost requirement according to processing technology, cylinder barrel 2 can adopt split-type structural.
As previously mentioned, although be illustrated exemplary embodiment of the present utility model with reference to accompanying drawing in illustrating, the utility model is not limited to above-mentioned embodiment, and scope of the present utility model should be limited by claims and equivalents thereof.
Claims (15)
1. a Liquid and gas damper, comprising:
Cylinder barrel, it has the tubular structure that the axial direction along described Liquid and gas damper extends, and one end of described cylinder barrel is closed end, and the other end is open end, and in described cylinder barrel, arrange the plug extended along described axial direction from the closed end of described cylinder barrel;
Plunger, it can slide along described axial direction relative to described cylinder barrel in described cylinder barrel, described plunger comprises plug in one end of the closed end near described cylinder barrel and closes at one end place of the closed end away from described cylinder barrel, described plunger and described cylinder barrel are sealed and matched, thus define the first liquid chamber for filling liquid hydraulic fluid; And
Piston, it is being arranged in described plunger relative to the mode that described plunger slides along described axial direction, described piston coordinates with described plunger seal, thus the chamber in described plunger be divided into the second liquid chamber of being positioned at described plug side and be positioned at the air chamber being used for blanketing gas with the described second relative side of liquid chamber, it is characterized in that
First passage for being communicated with described first liquid chamber and described second liquid chamber is set in described plug, in the side of close described second liquid chamber of described first passage, floating slider is set, one-level damping gap is formed between described floating slider and described plug, described floating slider can slide relative to described plug, thus change the size in described one-level damping gap, and
Described plug enters described passage after described Liquid and gas damper is compressed predetermined stroke, thus between described plug and described passage, form secondary damping gap.
2. Liquid and gas damper according to claim 1, is characterized in that,
Described plug also comprises the return flow line being directly or indirectly communicated with described first liquid chamber and described second liquid chamber, and described return flow line comprises reflux valve, and described reflux valve only allows hydraulic fluid from described second liquid chamber to the one-way valve of described first liquid chamber flowing.
3. Liquid and gas damper according to claim 2, is characterized in that,
Described return flow line also comprises the normally closed safety valve in parallel with described reflux valve, when the pressure in described first liquid chamber is greater than predetermined safety pressure value, described safety valve is opened to allow hydraulic fluid to be flowed to described second liquid chamber by described first liquid chamber by described safety valve.
4. Liquid and gas damper according to claim 3, is characterized in that,
Described safety valve and described reflux valve form as one.
5. the Liquid and gas damper according to any one of claim 2 to 4, is characterized in that,
Described return flow line branch is connected to described first passage.
6. Liquid and gas damper according to claim 5, is characterized in that,
Described reflux valve is installed to described floating slider.
7. Liquid and gas damper according to claim 6, is characterized in that,
Described reflux valve and described floating slider form as one.
8. Liquid and gas damper according to any one of claim 1 to 4, is characterized in that,
The initial position regulator of the initial value of the size for guaranteeing described one-level damping gap is set between described plug and described floating slider.
9. Liquid and gas damper according to claim 8, is characterized in that,
Described initial position regulator comprises the sealed cavity be arranged between described plug and described floating slider, is filled with the gas of predetermined pressure in described sealed cavity.
10. Liquid and gas damper according to claim 9, is characterized in that,
Described plug also comprises gas charging valve, is filled with described gas by described gas charging valve to described sealed cavity.
11. Liquid and gas dampers according to claim 8, is characterized in that,
Described initial position regulator comprises the spring assembly be arranged between described plug and described floating slider.
12. Liquid and gas dampers according to claim 8, is characterized in that,
Described initial position regulator comprises the memory foam material be arranged between described plug and described floating slider.
13. Liquid and gas dampers according to claim 1, is characterized in that,
Also the parts that are sealed and matched are provided with between described plunger and described cylinder barrel, described plunger arranges relief hole relative to the described parts that are sealed and matched near the side of the closed end of described cylinder barrel, and reflux before making the parts that are sealed and matched of hydraulic fluid between the described cylinder barrel of arrival and described plunger described second liquid chamber.
14. Liquid and gas dampers according to claim 1, is characterized in that,
One end of the closed end away from described cylinder barrel of described plunger is sealed by air chamber end socket and cover of plunger, arranges the gas charging valve be used for described chamber inflated, and arrange static seal system in described air chamber end socket in described cover of plunger.
15. Liquid and gas dampers according to claim 2, is characterized in that,
Described reflux valve has steel ball structure, described steel ball structure comprises backflow valve pocket, the fixed plate be arranged in described backflow valve pocket, the ball holder arranged through described fixed plate, the steel ball that is arranged on the spring described fixed plate and described ball holder and is seated in described ball holder, wherein multiple hole is set on described fixed plate and described ball holder, thus the damping force that reduction hydraulic fluid is subject to when described second liquid chamber flows back to described first liquid chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420426116.7U CN204113991U (en) | 2014-07-30 | 2014-07-30 | Liquid and gas damper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420426116.7U CN204113991U (en) | 2014-07-30 | 2014-07-30 | Liquid and gas damper |
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| CN204113991U true CN204113991U (en) | 2015-01-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101689320B1 (en) * | 2016-03-17 | 2017-01-02 | 주식회사 케이오비에이 | Hydraulic buffer with activating valve |
| CN109849961A (en) * | 2017-11-30 | 2019-06-07 | 比亚迪股份有限公司 | Hitch and coupler and draft gear |
| CN110901682A (en) * | 2019-12-06 | 2020-03-24 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN111439287B (en) * | 2020-04-26 | 2020-12-29 | 中车青岛四方车辆研究所有限公司 | Anti-climbing energy-absorbing device for train |
| CN113915276A (en) * | 2021-10-29 | 2022-01-11 | 名震实业控股集团有限公司 | Air cushion type shock absorber system |
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2014
- 2014-07-30 CN CN201420426116.7U patent/CN204113991U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101689320B1 (en) * | 2016-03-17 | 2017-01-02 | 주식회사 케이오비에이 | Hydraulic buffer with activating valve |
| CN109849961A (en) * | 2017-11-30 | 2019-06-07 | 比亚迪股份有限公司 | Hitch and coupler and draft gear |
| CN109849961B (en) * | 2017-11-30 | 2020-07-10 | 比亚迪股份有限公司 | Coupler and coupler buffering device |
| CN110901682A (en) * | 2019-12-06 | 2020-03-24 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN110901682B (en) * | 2019-12-06 | 2024-05-28 | 中车青岛四方车辆研究所有限公司 | Gas-liquid buffer |
| CN111439287B (en) * | 2020-04-26 | 2020-12-29 | 中车青岛四方车辆研究所有限公司 | Anti-climbing energy-absorbing device for train |
| CN113915276A (en) * | 2021-10-29 | 2022-01-11 | 名震实业控股集团有限公司 | Air cushion type shock absorber system |
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Granted publication date: 20150121 Termination date: 20170730 |