CN104196817A - Oil-gas two-medium damping hydraulic cylinder - Google Patents
Oil-gas two-medium damping hydraulic cylinder Download PDFInfo
- Publication number
- CN104196817A CN104196817A CN201410442022.3A CN201410442022A CN104196817A CN 104196817 A CN104196817 A CN 104196817A CN 201410442022 A CN201410442022 A CN 201410442022A CN 104196817 A CN104196817 A CN 104196817A
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- Prior art keywords
- piston
- piston rod
- inner chamber
- hydraulic cylinder
- cylinder
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- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 15
- 238000007667 floating Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 12
- 239000011261 inert gas Substances 0.000 abstract description 11
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 36
- 239000010720 hydraulic oil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
The invention discloses an oil-gas two-medium damping hydraulic cylinder, and belongs to the technical field of hydraulic cylinders. The cylinder comprises a cylinder body, a piston rod and a piston disposed at the right end of the piston rod. An inner cavity is formed in the piston rod, a floating piston capable of sliding along the inner cavity is arranged in the inner cavity, a seal is disposed between the floating piston and the inner wall of the inner cavity, the outer end of the piston rod is provided with an air inlet communicated with an inner cavity in the left side of the floating piston, and the piston or the right end of the piston rod is provided with an oil channel communicating a rodless cavity of the hydraulic cylinder and an inner cavity in the right side of the floating piston. The cylinder is simple in external structure, the outside size of the hydraulic cylinder is not increased, and installation is facilitated; impact energy of compression of inert gas is absorbed, the cylinder is safe and reliable to use, and the service life of the hydraulic cylinder can be prolonged; by adjusting pressure of the injected inert gas, the hydraulic cylinder is suitable for different work conditions, and product quality is stable.
Description
Technical field
The present invention relates to oil hydraulic cylinder technical field, specifically a kind of oily gas double-medium damping fluid cylinder pressure.
Background technique
Mechanism, in movement process, due to the effect of impulsive load or inertial force, when hydraulic cylinder piston moves to end of travel, with cylinder bottom generation mechanical collision, produces very large impact and noise.Cause thus the vibrations of complete machine, cause oil cylinder, host machine part damage parts, and other element in hydraulic system is exerted an influence.
Current domestic oil hydraulic cylinder adopts spring assembly to realize shock-absorbing function more.As shown in Figure 1, this structure is the spring oil hydraulic cylinder that possesses shock-absorbing function, mainly comprises 3 parts: spring seat, spring and oil hydraulic cylinder main body.Spring is connected with oil hydraulic cylinder main body by spring seat, spring housing is in the piston rod outside of oil hydraulic cylinder, in the time that the main machine structure part being connected with oil hydraulic cylinder is subject to impulsive load or structural member and due to inertial force, piston rod is regained rapidly, by Compress Spring impact-absorbing merit, avoid the shock of piston and cylinder bottom, reduce vibrations.But due to defects such as the fatigue failures of spring, its damping effect is not good.
In such scheme, because spring need to be fixed on oil cylinder with spring seat, make the external shape of whole oil cylinder more complicated, the space outerpace that causes oil cylinder to be connected with main frame reduces, and is unfavorable for the installation of oil cylinder and the distribution of main machine structure part; Because spring easily produces fatigue failure after Repeated Compression, and this inefficacy is uncertain, causes oil cylinder quality fluctuation; Because state's inner spring manufacture level is limited, the performance of each spring is difficult to be consistent, and causes whole cylinder quality uneven.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of oily gas double-medium damping fluid cylinder pressure, utilize the compression impact-absorbing merit to gas, realize the cushioning effect of oil hydraulic cylinder and main frame.
The present invention realizes with following technological scheme: a kind of oily gas double-medium damping fluid cylinder pressure, comprises cylinder barrel, piston rod and be arranged on the piston of piston rod right-hand member; Described piston rod inside has an inner chamber; The floating piston that can slide along inner chamber is installed in inner chamber, between floating piston and interior cavity wall, is provided with sealing; Have the suction port that is communicated to floating piston left side inner chamber in piston rod outer end; On described piston or piston rod right-hand member have the oil duct that is communicated with oil hydraulic cylinder rodless cavity and floating piston right side inner chamber.
It is further: described inner chamber is offered along piston rod axis, and inner chamber cross section is preferably circle.
On the cylndrical surface that described floating piston coordinates with interior cavity wall, have some grooves, seal ring and director element are installed in groove.
Described center, floating piston left side has a counterbore, and floating piston right side is plane.
Described suction port is opened on piston rod left end periphery, and suction port is connected to inner chamber by a L shaped passage being opened in piston rod.
Described inner chamber is a blind hole of offering from piston rod right-hand member, and described piston is fixed on piston rod right-hand member and seals up piston rod blind hole, has the oil duct that is communicated with oil hydraulic cylinder rodless cavity and floating piston right side inner chamber on piston.
In use, in the inner chamber in floating piston left side, be filled with a certain amount of inert gas, in it, pressure can be set up according to the specification of oil hydraulic cylinder.
Shock absorption principle: be filled with inert gas from suction port, sealing suction port; When oil hydraulic cylinder is normally worked, while not being subject to external impact, floating piston is because gas pressure effect is positioned at piston rod near piston one end; When oil hydraulic cylinder is subject to outside impact suddenly, the moment of piston rod fast retractile, the hydraulic oil of oil hydraulic cylinder rodless cavity cannot all reflux fast by return opening, has the trend of generation instantaneous high pressure.Because piston rod cavity has been filled with inert gas, and the decrement of gas is much larger than the decrement of liquid, therefore promote the inert gas of floating piston compression opposite side by the hydraulic oil of rodless cavity, part hydraulic oil can enter piston rod cavity, has avoided the impact of instantaneous high pressure.When the instantaneous pressure of oil hydraulic cylinder rodless cavity is released, after hydraulic oil refluxes by return opening, the hydraulic oil of piston rod cavity is back to oil hydraulic cylinder rodless cavity under the effect of the expansion of compressed gas acting of floating piston opposite side, the fluid refluxing by hydraulic fluid port in compensation rodless cavity, make hydraulic cylinder piston rod in the situation that being subject to external impact, keep the stationarity of motion, thereby avoided the main frame vibrations that produce due to temporary impact.
External structure of the present invention is simple, does not increase the outside dimensions of oil hydraulic cylinder, is beneficial to installation; By the compression impact-absorbing merit to inert gas, safety, reliable in the use, can extend oil hydraulic cylinder working life; Be filled with the pressure of inert gas by adjusting, make it adapt to different operating modes, constant product quality.
Brief description of the drawings
Below in conjunction with accompanying drawing, structure of the present invention is further illustrated.
Fig. 1 is a kind of spring damping fluid cylinder pressure related in background technique;
Fig. 2 is structural representation of the present invention.
1, piston rod; 11, suction port; 2, cylinder barrel; 3, floating piston; 4, piston; 41, oil duct; 5, inner chamber.
Embodiment
As shown in Figure 2, a kind of oily gas double-medium damping fluid cylinder pressure, comprises cylinder barrel 2, piston rod 1 and is arranged on the piston 4 of piston rod 1 right-hand member; Piston rod 1 inside has an inner chamber 5, and inner chamber 5 is blind holes of offering from piston rod 1 right-hand member; Floating piston 3 cooperations are arranged in inner chamber 5, on the cylndrical surface that floating piston 3 coordinates with inner chamber 5 inwalls, have some grooves, seal ring and director element are installed in groove, floating piston 3 can horizontally slip at inner chamber 5, floating piston 3 centers, left side have a counterbore, and floating piston 3 right sides are plane; Piston 4 is fixed on piston rod 1 right-hand member and seals up the opening of piston rod 1 blind hole, has the oil duct 41 that is communicated with oil hydraulic cylinder rodless cavity and floating piston 3 right side inner chambers 5 on piston 4; On piston rod 1 left end periphery, have suction port 11, suction port 11 is connected to inner chamber 5 by a L shaped passage being opened in piston rod 1.In use, in the inner chamber 5 in floating piston 3 left sides, be filled with a certain amount of inert gas, in it, pressure can be set up according to the specification of oil hydraulic cylinder.
When oil hydraulic cylinder is subject to outside impact suddenly, the moment of piston rod 1 fast retractile, the hydraulic oil of oil hydraulic cylinder rodless cavity cannot all reflux fast by oil outlet, has the trend of generation instantaneous high pressure.Because piston rod 1 inner chamber 5 has been filled with inert gas, and the decrement of gas is much larger than the decrement of liquid, therefore promote the inert gas in floating piston 3 compression piston bar 1 inner chambers 5 by hydraulic oil, part hydraulic oil can enter in piston rod 1 inner chamber 5 by the oil duct of piston 4 41, has avoided the impact of instantaneous high pressure.When the instantaneous pressure of oil hydraulic cylinder rodless cavity is released, after hydraulic oil refluxes by return opening, hydraulic oil in piston rod is back to oil hydraulic cylinder rodless cavity under the effect of the expansion of compressed gas acting of floating piston opposite side, compensate the fluid refluxing by hydraulic fluid port in rodless cavity, make the motion held stationary of hydraulic cylinder piston rod.Thereby the main frame vibrations that produce due to temporary impact are avoided.
Claims (6)
1. an oily gas double-medium damping fluid cylinder pressure, comprises cylinder barrel (2), piston rod (1) and is arranged on the piston (4) of piston rod (1) right-hand member; It is characterized in that: described piston rod (1) inside has an inner chamber (5); The floating piston (3) that can slide along inner chamber (5) is installed in inner chamber (5), between floating piston (3) and inner chamber (5) inwall, is provided with sealing; Have the suction port (11) that is communicated to floating piston (3) left side inner chamber (5) in piston rod (1) outer end; Described piston (4) is gone up or piston rod (1) right-hand member has the oil duct (41) that is communicated with oil hydraulic cylinder rodless cavity and floating piston (3) right side inner chamber (5).
2. the oily gas double-medium damping fluid of one according to claim 1 cylinder pressure, is characterized in that: described inner chamber (5) is offered along piston rod (1) axis, and inner chamber (5) cross section is preferably circle.
3. the oily gas double-medium damping fluid of one according to claim 2 cylinder pressure, is characterized in that: on the cylndrical surface that described floating piston (3) coordinates with inner chamber (5) inwall, have some grooves, seal ring and director element are installed in groove.
4. the oily gas double-medium damping fluid of one according to claim 2 cylinder pressure, is characterized in that: described floating piston (3) center, left side has a counterbore, and floating piston (3) right side is plane.
5. the oily gas double-medium damping fluid of one according to claim 1 cylinder pressure, it is characterized in that: described suction port (11) is opened on piston rod (1) left end periphery, suction port (11) is connected to inner chamber (5) by a L shaped passage being opened in piston rod (1).
6. the oily gas double-medium damping fluid of one according to claim 1 cylinder pressure, it is characterized in that: described inner chamber (5) is a blind hole of offering from piston rod (1) right-hand member, described piston (4) is fixed on piston rod (1) right-hand member and seals up piston rod (1) blind hole, has the oil duct (41) that is communicated with oil hydraulic cylinder rodless cavity and floating piston (3) right side inner chamber (5) on piston (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410442022.3A CN104196817A (en) | 2014-09-02 | 2014-09-02 | Oil-gas two-medium damping hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410442022.3A CN104196817A (en) | 2014-09-02 | 2014-09-02 | Oil-gas two-medium damping hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104196817A true CN104196817A (en) | 2014-12-10 |
Family
ID=52082160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410442022.3A Pending CN104196817A (en) | 2014-09-02 | 2014-09-02 | Oil-gas two-medium damping hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104196817A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762951A (en) * | 2016-12-28 | 2017-05-31 | 王金达 | A kind of compressed air backhaul single-action hydraulic cylinder |
| CN108488297A (en) * | 2018-04-11 | 2018-09-04 | 华侨大学 | A kind of hydro-pneumatic spring |
| CN110617294A (en) * | 2019-09-30 | 2019-12-27 | 江苏军宏机械有限公司 | Hydraulic tension hydro-pneumatic spring oil cylinder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006109794A1 (en) * | 2005-04-11 | 2006-10-19 | Komatsu Ltd. | Hydraulic cylinder |
| CN201496460U (en) * | 2009-07-22 | 2010-06-02 | 宁波市金波工贸有限公司 | A kind of oil and gas separation type shock absorber |
| CN201731010U (en) * | 2010-08-31 | 2011-02-02 | 大庆高新区飞驰减振器制造有限公司 | Gas spring built-in monocular shock absorber |
| CN102518619A (en) * | 2011-12-27 | 2012-06-27 | 山东天一液压科技股份有限公司 | Elastic buffering hydraulic cylinder |
| CN102518730A (en) * | 2011-12-31 | 2012-06-27 | 张洪领 | Inflatable vibration damper |
| CN202855178U (en) * | 2012-09-28 | 2013-04-03 | 浙江中兴减震器制造有限公司 | Single-cylinder shock absorber used for teaching |
-
2014
- 2014-09-02 CN CN201410442022.3A patent/CN104196817A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006109794A1 (en) * | 2005-04-11 | 2006-10-19 | Komatsu Ltd. | Hydraulic cylinder |
| CN201496460U (en) * | 2009-07-22 | 2010-06-02 | 宁波市金波工贸有限公司 | A kind of oil and gas separation type shock absorber |
| CN201731010U (en) * | 2010-08-31 | 2011-02-02 | 大庆高新区飞驰减振器制造有限公司 | Gas spring built-in monocular shock absorber |
| CN102518619A (en) * | 2011-12-27 | 2012-06-27 | 山东天一液压科技股份有限公司 | Elastic buffering hydraulic cylinder |
| CN102518730A (en) * | 2011-12-31 | 2012-06-27 | 张洪领 | Inflatable vibration damper |
| CN202855178U (en) * | 2012-09-28 | 2013-04-03 | 浙江中兴减震器制造有限公司 | Single-cylinder shock absorber used for teaching |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762951A (en) * | 2016-12-28 | 2017-05-31 | 王金达 | A kind of compressed air backhaul single-action hydraulic cylinder |
| CN108488297A (en) * | 2018-04-11 | 2018-09-04 | 华侨大学 | A kind of hydro-pneumatic spring |
| CN110617294A (en) * | 2019-09-30 | 2019-12-27 | 江苏军宏机械有限公司 | Hydraulic tension hydro-pneumatic spring oil cylinder |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141210 |
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| RJ01 | Rejection of invention patent application after publication |