CN105587708A - Static sealing oil cylinder with rodless cavity - Google Patents
Static sealing oil cylinder with rodless cavity Download PDFInfo
- Publication number
- CN105587708A CN105587708A CN201410618883.2A CN201410618883A CN105587708A CN 105587708 A CN105587708 A CN 105587708A CN 201410618883 A CN201410618883 A CN 201410618883A CN 105587708 A CN105587708 A CN 105587708A
- Authority
- CN
- China
- Prior art keywords
- oil
- cylinder
- cavity
- 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.)
- Granted
Links
Abstract
The invention relates to a static sealing oil cylinder with a rodless cavity. According to the invention, a capsule (1) is partitioned to form a rod cavity (5) and the rodless cavity (6) of the oil cylinder disclosed by the invention, wherein the rod cavity (5) is a dynamic sealing cavity; the rodless cavity (6) is a static sealing cavity; during stretching and compression processes of the oil cylinder, the capsule (1) only fits with with the inner wall of a cylinder barrel (2) and the outer wall of a piston rod (3) in a rolling manner; when the rodless cavity (6) is charged with high-pressure oil or high-pressure gas, the rod cavity (5) of the oil cylinder discharges outwards the oil or the gas, and the oil cylinder is stretched; and when an external force F on each of the two ends of the oil cylinder is greater than the inner pressure of the rodless cavity (6), the oil cylinder is compressed.
Description
Technical field
The present invention is a kind of novel oil cylinder or cylinder, relates to the static seal structure that oil cylinder adopts, and 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. Form a kind of movable sealing cavity of rigidity, although can carry larger pressure, lost efficacy because piston back-and-forth movement causes sealing part abrasion, produce oil cylinder Seepage.
Summary of the invention
The invention provides a kind of oil cylinder, rodless cavity is a kind of static seal cavity, solve from structure that existing oil cylinder exists ooze, Leakage.
The present invention solves the technical scheme that these technical problems adopt: cylinder barrel, piston rod are connected and form rodless cavity body and a rod chamber of a sealing with cyst membrane, cyst membrane is clamped between cylinder barrel and piston rod, cyst membrane two-port limit connects with piston rod, cylinder barrel respectively, is separated the rodless cavity and the rod chamber that form oil cylinder by cyst membrane. Wherein rod chamber is movable sealing cavity, and rodless cavity is static seal cavity. In oil cylinder stretching and compression process, cyst membrane is only fitted with inner wall of cylinder, piston rod outer wall turnup, and a generation is fitted, separating action. For realizing the feasibility of cyst membrane carrying oil cylinder High Voltage, the present invention solves the principle that cyst membrane carrying High Voltage adopts and is: the circular section that outer wall materials is identical, and radius is less, and the pressure that inside can apply is larger.
Prove for example: in present known air spring, having the bellows type air spring of diameter 200mm, is under 0.8MPa at maximum working pressure, and it is F=P × S that air spring cyst wall is subject to axial tension
Wherein F is power, and unit is N
P is inside air bag pressure, units MPa
S is air bag cross-sectional area, and unit is mm
Can obtain F=0.8 × π r2=25120N
Calculate bellows type air spring perimeter of section L=2 π r=628mm
Suffered tensile force f x=F/L=40N/mm in the unit length of perimeter of section
When section material is identical, air spring diameter is 20mm, and when the suffered pulling force of unit length of perimeter of section is 40N/mm, pressure is P1, therefore (P1 × π r2）/L=40
P1=(40 × L)/π r2=(40×2πr)/πr2=80/10=8MPa
Therefore in the time that air spring diameter is 20mm, it is 8MPa that cyst wall can bear operating pressure, is 10 times that 200mm bellows type air spring bears pressure 0.8MPa, proves that principle is correct.
The circular-arc cross section that cyst membrane of the present invention forms after rodless cavity is filled with oil gas, section radius is less, the pressure of cyst membrane carrying is larger, therefore the cyst wall of known bellows type air spring carries out can be used as the cyst membrane that in this case patent, oil cylinder is used after oil resistant design, can reach cyst membrane and hold the application target that cuts oil cylinder High Voltage, realize the feasibility of cyst membrane carrying High Voltage.
The invention has the beneficial effects as follows, present case cylinder seal part cyst membrane only produces laminating, separating action with cylinder barrel, piston rod in oil cylinder stretching and compression process, do not produce the wearing and tearing of relative motion, and can carry oil cylinder High Voltage, and therefore solve the problem of traditional oil cylinder leakage of oil from structure, do not need to compensate because of oil cylinder leakage of oil, gas the operation of oil, gas, oil cylinder bearing pressure of the present invention is large, from heavy and light, the leaf spring that replaceable vehicle generally uses, reduces car load deadweight. Traditional oil cylinder that replaceable engineering machinery is used, avoids leakage of oil to pollute.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the compressive state profile of first embodiment of oil cylinder of the present invention.
Fig. 2 is the extended state profile of first embodiment of oil cylinder 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 the 3rd embodiment of oil cylinder of the present invention.
Fig. 6 is the extended state profile of the 3rd embodiment of oil cylinder of the present invention.
Fig. 7 is the profile of the 4th embodiment of oil cylinder of the present invention.
Fig. 8 is the profile of the 5th embodiment of oil cylinder of the present invention.
Fig. 9 is the profile of the 6th embodiment of oil cylinder of the present invention.
1. cyst membranes in figure, 2. cylinder barrel, 3. piston rod, 4. backstay, 5. rod chamber, 6. rodless cavity, 7. oil-through hole, 8. center cavity, 9. oil-through hole, 10. crosses oil pocket, 11. pressure limiting valves, 12. cyst membranes, 13. outer cylinders, 14. rod chambers, 15. cyst membranes.
Detailed description of the invention
In first embodiment of Fig. 1, piston rod (3) coaxially assembles with cylinder barrel (2), piston rod (3) is along sliding axially in cylinder barrel (2) port, cyst membrane (1) is clamped in cylinder barrel (2), between piston rod (3), cyst membrane (1) two-port limit respectively with cylinder barrel (2), piston rod (3) connects, be separated to form the rod chamber (5) and rodless cavity (6) of present case oil cylinder by cyst membrane (1), wherein rod chamber (5) is movable sealing cavity, rodless cavity (6) is static seal cavity, oil cylinder stretch with compression process in cyst membrane (1) only with cylinder barrel (2) inwall, the laminating of piston rod (3) outer wall turnup. when rodless cavity (6) passes into hydraulic oil or gases at high pressure, rod chamber (5) discharges oil or gas, and oil cylinder stretches, and Fig. 2 is first embodiment extended state. in the time that oil cylinder two ends external force F is greater than rodless cavity (6) internal pressure, oil cylinder compression, Fig. 1 is first embodiment compressive state.
In second embodiment of Fig. 3, backstay (4) coaxially assembles with cylinder barrel (2), piston rod (3) coaxially assembles with backstay (4), and piston rod (3) inwall along backstay (4) outer wall slide axially, piston rod (3) slides axially in cylinder barrel (2) port, backstay (4) slides axially stable for strengthening piston rod (3). Backstay (4) has one end of oil-through hole (7) to be fixedly connected with cylinder barrel (2) bottom. Center cavity (8) connects by one or more oil-through holes (7) and rodless cavity (6), and Fig. 3 is second embodiment compressive state, and Fig. 4 is oil cylinder extended state in second embodiment.
In the 3rd embodiment of Fig. 5, piston rod (3) slides along cylinder barrel (2) inwall at the inner flange plate structure end of cylinder barrel (2), strengthening piston rod (3) slides axially stable, on piston rod (3) flange plate structure, there are one or more oil-through holes (9), connect rodless cavity (6) and cross oil pocket (10), Fig. 6 is the 3rd embodiment extended state.
In the 4th embodiment of Fig. 7, pressure limiting valve (11) is connected with cylinder barrel (2), the oil that rodless cavity (6) is discharged or gas are through pressure limiting valve (11) pressure limiting, make oil cylinder rodless cavity (6) maintain certain pressure, to keep cyst membrane (1) and cylinder barrel (2) inwall, piston rod (3) outer wall pressurising laminating.
In the 5th embodiment of Fig. 8, cylinder barrel (2) internal structure is identical with first embodiment, increase outer cylinder (13), cyst membrane (12), wherein outer cylinder (13) coaxially assembles with cylinder barrel (2), cyst membrane (12) is clamped in outer cylinder (13), between cylinder barrel (2), cyst membrane (12) two-port limit respectively with cylinder barrel (2), outer cylinder (13) connects, be separated to form rod chamber (14) and rodless cavity (6) by cyst membrane (12), wherein rod chamber (14) is low-pressure cavity, rodless cavity (6) is for high pressure chest and belong to static seal cavity, form Telescopic oil tank structure.
In the 6th embodiment of Fig. 9, cyst membrane (15) is connected with cylinder barrel (2), piston rod (3) respectively and forms rod chamber (5), wherein rod chamber (5) is movable sealing cavity, rodless cavity (6) is static seal cavity, when rodless cavity (6) passes into hydraulic oil or gases at high pressure, rod chamber (5) discharges oil or gas, oil cylinder stretches, when rod chamber (5) passes into hydraulic oil or gases at high pressure, rodless cavity (6) discharges oil or gas, and oil cylinder stretches.
Claims (6)
1. an oil cylinder or cylinder, comprise cyst membrane (1), cylinder barrel (2), piston rod (3), wherein, piston rod (3) coaxially assembles with cylinder barrel (2), piston rod (3) slides axially in cylinder barrel (2) port, cyst membrane (1) two-port limit respectively with cylinder barrel (2), piston rod (3) connects, it is characterized in that: cyst membrane (1) is clamped in cylinder barrel (2), between piston rod (3), cyst membrane (1) is separated to form the rod chamber (5) and rodless cavity (6) of oil cylinder, wherein rod chamber (5) is low-pressure cavity, rodless cavity (6) is high pressure chest, in low-pressure cavity (5) chamber, pressure is less than pressure in high pressure chest (6) chamber, cyst membrane (1) and cylinder barrel (2) inwall in oil cylinder stretching and compression process, the laminating of piston rod (3) outer wall turnup.
2. oil cylinder according to claim 1, it is characterized in that: backstay (4) coaxially assembles with cylinder barrel (2), in oil cylinder stretching or compression process, piston rod (3) inwall slides axially along backstay (4) outer wall, and center cavity (8) connects by one or more oil-through holes (7) and rodless cavity (6).
3. an oil cylinder claimed in claim 1, it is characterized in that: piston rod (3) slides along cylinder barrel (2) inwall at the inner flange plate structure end of cylinder barrel (2), on piston rod (3) flange plate structure, there are one or more oil-through holes (9), connect rodless cavity (6) and cross oil pocket (10).
4. oil cylinder according to claim 1, it is characterized in that: pressure limiting valve (11) is connected with cylinder barrel (2), the oil of discharging or gas are through pressure limiting valve (11) pressure limiting, make oil cylinder rodless cavity (6) have certain pressure, to keep cyst membrane (1) and cylinder barrel (2) inwall, piston rod (3) outer wall pressurising laminating.
5. oil cylinder according to claim 1, it is characterized in that: outer cylinder (13) coaxially assembles with cylinder barrel (2), cyst membrane (12) is clamped between outer cylinder (13), cylinder barrel (2), cyst membrane (12) two-port limit is connected with cylinder barrel (2), outer cylinder (13) respectively, cyst membrane (12) is separated to form rod chamber (14) and rodless cavity (6), rod chamber (14) is low-pressure cavity, rodless cavity (6) is for high pressure chest and belong to static seal cavity, forms Telescopic oil tank structure.
6. oil cylinder according to claim 1, it is characterized in that: cyst membrane (15) is connected with cylinder barrel (2), piston rod (3) respectively and forms rod chamber (5), rod chamber (5) is movable sealing cavity, rodless cavity (6) is static seal cavity, when rodless cavity (6) passes into hydraulic oil or gases at high pressure, rod chamber (5) discharges oil or gas, oil cylinder stretches, when rod chamber (5) passes into hydraulic oil or gases at high pressure, rodless cavity (6) discharges oil or gas, and oil cylinder stretches.
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 true CN105587708A (en) | 2016-05-18 |
| CN105587708B 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864144A (en) * | 2016-05-23 | 2016-08-17 | 重庆德盟液压机械有限公司 | Capsule film type pressure cylinder or air cylinder |
| CN106151162A (en) * | 2016-07-28 | 2016-11-23 | 重庆德盟液压机械有限公司 | Double cyst membrane hydraulic cylinders or cylinder and plunger displacement 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 |
Non-Patent Citations (1)
| Title |
|---|
| 吴根茂等: "《新编实用电液比例技术》", 30 September 2006 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864144A (en) * | 2016-05-23 | 2016-08-17 | 重庆德盟液压机械有限公司 | Capsule film type pressure cylinder or air cylinder |
| CN106151162A (en) * | 2016-07-28 | 2016-11-23 | 重庆德盟液压机械有限公司 | Double cyst membrane hydraulic cylinders or cylinder and plunger displacement 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105587708B (en) | 2017-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201225343Y (en) | Gas-liquid mixing boosting device | |
| CN104864017B (en) | A kind of improved automotive seat air spring | |
| CN105587708A (en) | Static sealing oil cylinder with rodless cavity | |
| CN101936312A (en) | High-pressure piston type accumulator | |
| CN108317127A (en) | Novel energy-storage hydraulic cylinder | |
| CN111473005A (en) | Interlayer cavity type hydraulic bag and energy accumulator with same | |
| CN105673758B (en) | Gas compensating type gas spring | |
| CN103233928A (en) | Energy storage supercharger | |
| CN103434171A (en) | Hydraulic press capable of simultaneously pressing double perforating bullets | |
| CN105179551A (en) | Single-piston-rod double-cylinder-barrel hydro-pneumatic spring cylinder | |
| CN208106881U (en) | Novel energy-storage hydraulic cylinder | |
| CN105570231B (en) | Rod chamber static seal oil cylinder | |
| CN205977626U (en) | Two unfamiliar diaphragm pumps | |
| CN201244629Y (en) | Gas-liquid reinforcement riveter | |
| CN102121508B (en) | Double-chamber hydragass spring | |
| CN204253494U (en) | High speed and high pressure injection machine die cylinder | |
| CN202484175U (en) | Nitrogen spring with high sealing performance | |
| CN201368088Y (en) | Double-stage constant-thrust oil cylinder | |
| CN201625553U (en) | Novel hydraulic breaking hammer for engineering truck | |
| CN202628687U (en) | Energy-saving system for working device | |
| CN205078533U (en) | Novel two -way pneumatic bracing piece | |
| CN204664419U (en) | Air-pressure type sealing device | |
| CN114458656B (en) | Hydraulic oil cylinder with axial support protection | |
| CN210068598U (en) | Piston type energy accumulator for hydraulic pump station | |
| CN207333126U (en) | A kind of high-pressure pneumatic hydraulic 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 |