CN105587708B - Rodless cavity static seal oil cylinder - Google Patents
Rodless cavity static seal oil cylinder Download PDFInfo
- Publication number
- CN105587708B CN105587708B CN201410618883.2A CN201410618883A CN105587708B CN 105587708 B CN105587708 B CN 105587708B CN 201410618883 A CN201410618883 A CN 201410618883A CN 105587708 B CN105587708 B CN 105587708B
- Authority
- CN
- China
- Prior art keywords
- oil
- cylinder
- piston rod
- oil cylinder
- rodless cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The present invention relates to rodless cavity static seal oil cylinder, cyst membrane（1）It is separated to form the rod chamber of present case oil cylinder（5）With rodless cavity（6）, wherein rod chamber (5) is dynamic sealing cavity, and rodless cavity (6) is that the stretching of static seal chamber oil cylinders is only bonded with cyst membrane in compression process (1) with cylinder barrel (2) inwall, piston rod (3) outer wall turnup.Work as rodless cavity（6）It is passed through hydraulic oil or gases at high pressure, cylinder rod chamber（5）Discharge oil or gas, oil cylinder stretching.When oil cylinder both ends external force F is more than rodless cavity（6）During internal pressure, oil cylinder compression.
Description
Technical field
The present invention is a kind of novel oil cylinder or cylinder, is related to the static seal structure of oil cylinder use, effectively avoids oil cylinder seepage
Oil gas.
Background technology
At present, known oil cylinder essential structure is made up of cylinder body, piston, seal etc..Formed a kind of rigid dynamic close
Seal cavity, although larger pressure can be carried, the sealing part abrasion caused by piston back-and-forth movement and fail, produce oil cylinder seepage and show
As.
The content of the invention
The invention provides a kind of oil cylinder, rodless cavity is a kind of static seal cavity, solves existing oil cylinder from structure and exists
Ooze, Leakage.
Technical scheme is used by the present invention solves these technical problems：Cylinder barrel, piston rod and cyst membrane are connected and formed
One sealing rodless cavity body and a rod chamber, cyst membrane be clamped between cylinder barrel and piston rod, cyst membrane two-port side respectively with
Piston rod, cylinder barrel connection, the rodless cavity and rod chamber for forming oil cylinder are separated by cyst membrane.Wherein rod chamber is dynamic sealing cavity, nothing
Rod cavity is static seal cavity.Oil cylinder stretches only to be bonded with cyst membrane in compression process with inner wall of cylinder, piston rod outer wall turnup, is only produced
Raw fitting, separating action.To realize that cyst membrane carries the feasibility of oil cylinder High Voltage, the present invention solves cyst membrane carrying High Voltage and adopted
Principle is：Outer wall materials identical circular section, radius is smaller, and the pressure that inside can apply is bigger.
Citing proves：There is diameter 200mm bellows type air spring in presently known air spring, in maximum working pressure
For under 0.8MPa, air spring cyst wall is F=P × S by axial tension
Wherein F is power, and unit is N
P is inside air bag pressure, units MPa
S accumulates for balloon cross-sectional, unit mm
It then can obtain F=0.8 × π r2=25120N
Calculate the π r=628mm of bellows type air spring perimeter of section L=2
Suffered pulling force F in the unit length of perimeter of sectionx=F/L=40N/mm
When section material is identical, a diameter of 20mm of air spring, pulling force suffered by the unit length of perimeter of section is 40N/mm
When, pressure P1, therefore（P1×πr2）/L=40
Then P1=(40 × L)/π r2=(40×2πr) / πr2=80/10=8MPa
Therefore as a diameter of 20mm of air spring, it is 8MPa that cyst wall, which can bear operating pressure, is 200mm bellows air bullets
Spring bears 10 times of pressure 0.8MPa, it was demonstrated that principle is correct.
The circular arc cross-sections that the cyst membrane of the present invention is formed after rodless cavity is filled with oil gas, section radius are smaller, cyst membrane carrying
Pressure it is bigger, therefore known bellows type air spring cyst wall carry out oil resistant design after can be as the capsule of oil cylinder in this case patent
Film, it can reach cyst membrane and hold the application target for cutting oil cylinder High Voltage, realize the feasibility of cyst membrane carrying High Voltage.
The invention has the advantages that present case cylinder seal part cyst membrane is in oil cylinder stretching and in compression process and cylinder
Cylinder, piston rod produce fitting, separating action, do not produce the abrasion of relative motion, and can carry oil cylinder High Voltage, therefore
Solve the problems, such as traditional oil cylinder leakage of oil from structure, it is not necessary to because oil cylinder leakage of oil, gas and compensate oil, the behaviour of gas
Make, oil cylinder bearing pressure of the invention is big, from heavy and light, leaf spring that replaceable vehicle generally uses, reduces vehicle deadweight.Can
Traditional oil cylinder of engineering machinery is replaced, avoids seepage oily pollution.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the compressive state profile of oil cylinder one embodiment of the present invention.
Fig. 2 is the extended state profile of oil cylinder one embodiment of the present invention.
Fig. 3 is the compressive state profile of second embodiment of oil cylinder of the present invention.
Fig. 4 is the extended state profile of second embodiment of oil cylinder of the present invention.
Fig. 5 is the compressive state profile of 3rd embodiment of oil cylinder of the present invention.
Fig. 6 is the extended state profile of 3rd embodiment of oil cylinder of the present invention.
Fig. 7 is the profile of 4th embodiment of oil cylinder of the present invention.
Fig. 8 is the profile of 5th embodiment of oil cylinder of the present invention.
Fig. 9 is the profile of 6th embodiment of oil cylinder of the present invention.
1. cyst membrane in figure, 2. cylinder barrels, 3. piston rods, 4. locating rods, 5. rod chambers, 6. rodless cavities, 7. oil-through holes, 8. centers
Chamber, 9. oil-through holes, 10. cross oil pocket, 11. pressure limiting valves, 12. cyst membranes, 13. outer cylinders, 14. rod chambers, 15. cyst membranes.
Embodiment
In Fig. 1 one embodiment, piston rod（3）With cylinder barrel（2）Coaxial assembling, piston rod（3）Along cylinder barrel（2）Port
Inside slide axially, cyst membrane（1）It is clamped in cylinder barrel（2）, piston rod（3）Between, cyst membrane（1）Two-port side respectively with cylinder barrel（2）, it is living
Stopper rod（3）Connection, by cyst membrane（1）It is separated to form the rod chamber of present case oil cylinder（5）With rodless cavity（6）, wherein rod chamber (5) is
Dynamic sealing cavity, rodless cavity (6) are static seal cavity, oil cylinder stretching and cyst membrane (1) in compression process only with cylinder barrel (2) inwall,
Piston rod (3) outer wall turnup is bonded.Work as rodless cavity（6）Hydraulic oil or gases at high pressure are passed through, rod chamber (5) discharges oil or gas
Body, oil cylinder stretching, Fig. 2 is one embodiment extended state.When oil cylinder both ends external force F is more than rodless cavity（6）During internal pressure,
Oil cylinder compresses, and Fig. 1 is one embodiment compressive state.
In second embodiment of Fig. 3, locating rod（4）With cylinder barrel（2）Coaxial assembling, piston rod（3）With locating rod（4）Together
Axle assembles, and piston rod（3）Inwall is along locating rod（4）Outer wall slides axially, piston rod（3）In cylinder barrel（2）Axially slided in port
It is dynamic, locating rod（4）For strengthening piston rod（3）Slide axially stabilization.Locating rod（4）There is oil-through hole（7）One end and cylinder barrel（2）
Bottom is fixedly connected.Center cavity（8）Pass through one or more oil-through holes（7）With rodless cavity（6）Insertion, Fig. 3 are second implementation
Example compressive state, Fig. 4 is oil cylinder extended state in second embodiment.
In the 3rd embodiment of Fig. 5, piston rod（3）In cylinder barrel（2）Internal flange plate structure end is along cylinder barrel（2）Inwall
Slide, strengthen piston rod（3）Slide axially stabilization, piston rod（3）There are one or more oil-through holes on flange plate structure（9）, pass through
Logical rodless cavity（6）With crossing oil pocket（10）, Fig. 6 is the 3rd embodiment extended state.
In the 4th embodiment of Fig. 7, pressure limiting valve（11）With cylinder barrel（2）Connection, the oil or gas warp of rodless cavity (6) discharge
Cross pressure limiting valve（11）Pressure limiting, make oil cylinder rodless cavity（6）Certain pressure is maintained, to keep cyst membrane（1）With cylinder barrel (2) inwall, piston
Bar (3) outer wall pressurising is bonded.
In the 5th embodiment of Fig. 8, cylinder barrel（2）Internal structure is identical with one embodiment, increases outer cylinder（13）、
Cyst membrane（12）, wherein outer cylinder（13）With cylinder barrel（2）Coaxial assembling, cyst membrane（12）It is clamped in outer cylinder（13）, cylinder barrel（2）It
Between, cyst membrane（12）Two-port side respectively with cylinder barrel（2）, outer cylinder（13）Connection, by cyst membrane（12）It is separated to form rod chamber（14）
With rodless cavity（6）, wherein rod chamber (14) is low pressure chamber, and rodless cavity (6) is high pressure chest and belongs to static seal cavity, and formation is stretched
Contracting formula sleeve oil cylinder structure.
In the 6th embodiment of Fig. 9, cyst membrane（15）Respectively with cylinder barrel（2）, piston rod（3）Connect and form rod chamber
（5）, wherein rod chamber (5) is dynamic sealing cavity, and rodless cavity (6) is static seal cavity, works as rodless cavity（6）It is passed through hydraulic oil or height
Calm the anger body, rod chamber (5) discharges oil or gas, oil cylinder stretching, works as rod chamber（5）It is passed through hydraulic oil or gases at high pressure, nothing
Rod cavity (6) discharges oil or gas, oil cylinder stretching.
Claims (1)
1. a kind of oil cylinder or cylinder, it is characterized in that：Including cyst membrane (1), cylinder barrel (2), piston rod (3), wherein, piston rod (3) with
Cylinder barrel (2) coaxially assembles, and piston rod (3) slides axially in cylinder barrel (2) port, cyst membrane (1) two-port side respectively with cylinder barrel
(2), piston rod (3) is connected, and cyst membrane (1) is clamped between cylinder barrel (2), piston rod (3), and cyst membrane (1) is separated to form having for oil cylinder
Rod cavity (5) and rodless cavity (6), wherein rod chamber (5) is low pressure chamber, and rodless cavity (6) is high pressure chest, and low pressure chamber intracavitary pressure is than high
Press chamber intracavitary pressure small, oil cylinder stretching is pasted with cyst membrane (1) in compression process and cylinder barrel (2) inwall, piston rod (3) outer wall turnup
Close；Piston rod (3), which is located at the internal one end of cylinder barrel (2), has flange plate structure, and the flange plate structure is slided along cylinder barrel (2) inwall
It is dynamic, there are one or more oil-through holes (9) on the flange plate structure of piston rod (3), oil pocket (10) was additionally provided with piston rod (3),
The oil-through hole (9) connects rodless cavity (6) with crossing oil pocket (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618883.2A CN105587708B (en) | 2014-11-06 | 2014-11-06 | Rodless cavity static seal oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410618883.2A CN105587708B (en) | 2014-11-06 | 2014-11-06 | Rodless cavity static seal oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105587708A CN105587708A (en) | 2016-05-18 |
| CN105587708B true CN105587708B (en) | 2017-12-12 |
Family
ID=55927532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410618883.2A Active CN105587708B (en) | 2014-11-06 | 2014-11-06 | Rodless cavity static seal oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105587708B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864144B (en) * | 2016-05-23 | 2019-01-22 | 重庆德盟液压机械有限公司 | Film hydraulic cylinder or cylinder |
| CN106151162B (en) * | 2016-07-28 | 2019-01-11 | 重庆德盟液压机械有限公司 | Double cyst membrane hydraulic cylinders and plunger pump |
| CN108317126A (en) * | 2018-04-08 | 2018-07-24 | 天津熙盛科技发展有限公司 | Without piston pressure cylinder |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3373694A (en) * | 1965-10-21 | 1968-03-19 | John F. Taplin | Cylinder and piston unit having noncollapsible dual rolling diaphragm |
| US3391644A (en) * | 1965-10-21 | 1968-07-09 | John F. Taplin | Double acting actuator or pump having a pair of rolling diaphragms |
| US3769879A (en) * | 1971-12-09 | 1973-11-06 | A Lofquist | Self-compensating diaphragm pump |
| SU423927A1 (en) * | 1971-12-13 | 1974-04-15 | Я. Г. Захарин , В. В. Соусь | HYDRAULIC POWER DEVICE |
| US4257456A (en) * | 1979-10-29 | 1981-03-24 | Hydra-Rig, Inc. | Pressure compensated spool valve |
| US4281589A (en) * | 1976-08-21 | 1981-08-04 | Kurt Stoll | Working cylinder for pneumatic or hydraulic pressure media |
| GB2116632A (en) * | 1982-03-08 | 1983-09-28 | Bauakademie Ddr | Cylindrical lifting unit |
| US5138936A (en) * | 1990-01-01 | 1992-08-18 | Elie Kent | Unlimited amplitude rolling piston |
| CN2714865Y (en) * | 2004-06-17 | 2005-08-03 | 葛银松 | Constant tension rolling diaphragm damping cylinder |
| CN101135374A (en) * | 2006-08-31 | 2008-03-05 | 华南理工大学 | Rolling type end face seal dissepiment |
| CN101725587A (en) * | 2009-12-29 | 2010-06-09 | 中国科学院国家天文台南京天文光学技术研究所 | Hydraulic scaling mechanism of sealed cylinder body on basis of flexible element |
| CN103477092A (en) * | 2010-12-07 | 2013-12-25 | 通用压缩股份有限公司 | Compressor and/or expander device with rolling piston seal |
-
2014
- 2014-11-06 CN CN201410618883.2A patent/CN105587708B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3373694A (en) * | 1965-10-21 | 1968-03-19 | John F. Taplin | Cylinder and piston unit having noncollapsible dual rolling diaphragm |
| US3391644A (en) * | 1965-10-21 | 1968-07-09 | John F. Taplin | Double acting actuator or pump having a pair of rolling diaphragms |
| US3769879A (en) * | 1971-12-09 | 1973-11-06 | A Lofquist | Self-compensating diaphragm pump |
| SU423927A1 (en) * | 1971-12-13 | 1974-04-15 | Я. Г. Захарин , В. В. Соусь | HYDRAULIC POWER DEVICE |
| US4281589A (en) * | 1976-08-21 | 1981-08-04 | Kurt Stoll | Working cylinder for pneumatic or hydraulic pressure media |
| US4257456A (en) * | 1979-10-29 | 1981-03-24 | Hydra-Rig, Inc. | Pressure compensated spool valve |
| GB2116632A (en) * | 1982-03-08 | 1983-09-28 | Bauakademie Ddr | Cylindrical lifting unit |
| US5138936A (en) * | 1990-01-01 | 1992-08-18 | Elie Kent | Unlimited amplitude rolling piston |
| CN2714865Y (en) * | 2004-06-17 | 2005-08-03 | 葛银松 | Constant tension rolling diaphragm damping cylinder |
| CN101135374A (en) * | 2006-08-31 | 2008-03-05 | 华南理工大学 | Rolling type end face seal dissepiment |
| CN101725587A (en) * | 2009-12-29 | 2010-06-09 | 中国科学院国家天文台南京天文光学技术研究所 | Hydraulic scaling mechanism of sealed cylinder body on basis of flexible element |
| CN103477092A (en) * | 2010-12-07 | 2013-12-25 | 通用压缩股份有限公司 | Compressor and/or expander device with rolling piston seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105587708A (en) | 2016-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105587708B (en) | Rodless cavity static seal oil cylinder | |
| CN201225343Y (en) | Gas-liquid mixing boosting device | |
| CN104864017B (en) | A kind of improved automotive seat air spring | |
| CN202683721U (en) | Internal high pressure forming device | |
| CN105673758B (en) | Gas compensating type gas spring | |
| CN204984759U (en) | Novel plunger pump | |
| CN105570231B (en) | Rod chamber static seal oil cylinder | |
| CN102764809B (en) | Hydro forming device | |
| CN202251207U (en) | Hydraulic cylinder | |
| CN107061594A (en) | A kind of spring colloid damper | |
| CN208106881U (en) | Novel energy-storage hydraulic cylinder | |
| CN204253494U (en) | High speed and high pressure injection machine die cylinder | |
| CN102536274B (en) | Equipressure double-telescopic prop | |
| CN205277970U (en) | Stable form pneumatic cylinder structure | |
| CN108105198A (en) | A kind of single-action hydraulic cylinder | |
| CN201625553U (en) | Novel hydraulic breaking hammer for engineering truck | |
| CN205078533U (en) | Novel two -way pneumatic bracing piece | |
| CN105298982B (en) | A kind of two-action multi-stage telescopic oil cylinder | |
| WO2013099642A1 (en) | Fluid pressure cylinder | |
| CN207935195U (en) | A kind of top protection hydraulic pressure hydraulic cylinder | |
| CN207018153U (en) | A kind of slurry pump head | |
| CN106151166A (en) | The asynchronous telescopic hydraulic cylinder of dibit | |
| CN209324916U (en) | The rigid self-locking gas spring of the two-tube interior air bag of low pressure | |
| CN104265233A (en) | Membrane expansion type packer | |
| CN101210571A (en) | Series connection separable filling sealing device for pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: D1-6-1, international student entrepreneurship Park, No. 71-1, Kecheng Road, Jiulongpo District, Chongqing 400039 Patentee after: Chongqing Daiwen Energy Technology Co.,Ltd. Address before: D1-6-1, international student entrepreneurship Park, No. 71-1, Kecheng Road, Jiulongpo District, Chongqing 400039 Patentee before: CHONGQING DEMENG HYDRAULIC MACHINERY Co.,Ltd. |
|
| CP03 | Change of name, title or address |