CN2136894Y - Pressure lubricating piston pair - Google Patents
Pressure lubricating piston pair Download PDFInfo
- Publication number
- CN2136894Y CN2136894Y CN 92213231 CN92213231U CN2136894Y CN 2136894 Y CN2136894 Y CN 2136894Y CN 92213231 CN92213231 CN 92213231 CN 92213231 U CN92213231 U CN 92213231U CN 2136894 Y CN2136894 Y CN 2136894Y
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- CN
- China
- Prior art keywords
- piston
- pressure oil
- cylinder body
- annular space
- passage
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a piston pair used in a hydraulic mechanism, comprising a piston and a cylinder body. One group of sealing rings is arranged at each of the two ends of the friction travel, which makes the piston pair form a closed annular clearance between the two groups of sealing rings. The pressure oil in the piston cavity is introduced into the clearance through the passage arranged on the piston or the cylinder body or the pressure oil is filled from the outside, which causes a complete oil film is formed around the piston. The lubrication is reliable, the sealing performance is improved, the pressure oil layer has bearing action on the piston, which causes the stressing condition of the piston to be improved, the dynamic stability is good, and the work efficiency and the bearing capacity of the liquid mechanism are favorable to be improved.
Description
The piston that the utility model relates in the fluid drive mechanism is paid.
In fluid drive mechanism, piston and cylinder body composition piston are paid, and sealing between the two realizes by one group of seal ring.In the piston moving process, oil leaks through seal ring in a small amount of cylinder, goes in the gap between casing wall and the piston lubricate.Because the oil mass of leaking is limited and inhomogeneous, be difficult to around piston, form complete oil film, thereby lubrication to be unreliable, it is big that piston is paid friction factor, easily produces high temperature, influences working efficiency, and in addition, piston easily vibrates, and bearing capacity is low.
The purpose of this utility model is to pay for fluid drive mechanism provides a kind of piston lubricated and good seal performance, to improve the working efficiency of hydraulic mechanism, improves bearing capacity.
The purpose of this utility model is to realize like this, one group of seal ring is respectively established at the two ends that the friction stroke takes place in piston is paid, form the annular space of sealing between two groups of seal rings, piston is paid and is provided with the passage of introducing pressure oil in this annular space, this passage can communicate with piston cavity, introduces cavity pressure oil, also can communicate with the ambient pressure oil sources, for example communicate, squeeze into pressure oil with oil pump.Specifically have following three kinds of schemes selective: 1, passage is arranged in the piston, and the annular space communicates with piston cavity; 2, passage is arranged on the cylinder body, and the annular space communicates with piston cavity; 3, passage is arranged on the cylinder body, and the annular space communicates with the ambient pressure oil sources.
Adopt the utility model pressure lubrication piston to pay,, make piston form complete oil film on every side because the annular space of sealing communicates with pressure oil-source and is full of oil all the time, thereby piston to pay lubrication reliable, surface friction drag reduces, and heating value reduces, and operating life prolongs, mechanical efficiency significantly improves, simultaneously, the pressure oil reservoir around the piston produces supporting role to piston, has improved the stress of piston, its dynamic stability and bearing capacity are all increased, and sealability also makes moderate progress.
Below in conjunction with description of drawings embodiment of the present utility model.
Fig. 1, Fig. 2, Fig. 3 are respectively three example structure figure that pressure lubrication piston of the present utility model is paid.
This pressure lubrication piston is paid by cylinder body 5 and piston 4 and is formed, and the two ends of paying the friction stroke at piston respectively are provided with one group of seal ring 2, forms the annular space 6 of sealing between the two, and piston is paid and is provided with the passage 3 of introducing pressure oil in this gap.
Among Fig. 1 embodiment, seal ring is located at the two ends of piston 4, and two passages 3 are located on the piston 4, and annular space 6 communicates with piston cavity 1 and introduces cavity pressure oil.
Among Fig. 2 embodiment, piston 4 is a plunger type, and seal ring 2 is fixed on the inwall of cylinder body 5, and two passages 3 are located on the cylinder body, and annular space 6 communicates with piston cavity 1 and introduces cavity pressure oil.
Among Fig. 3 embodiment, passage 3 is located on the cylinder body 5, and annular space 6 communicates with ambient pressure oil sources (as oil pump).Piston is a plunger type in this example, and seal ring 2 is fixed on the inwall of cylinder body 5.
Claims (5)
1, the pressure lubrication piston is paid, and is made up of piston and cylinder body, it is characterized in that the two ends that the friction stroke takes place in paying piston respectively establish one group of seal ring, forms the annular space of sealing between two groups of seal rings, and piston is paid and is provided with passage from pressure oil to this annular space that introduce.
2, pay as the described pressure lubrication piston of above-mentioned claim 1, it is characterized in that passage is located on the piston, the annular space communicates with piston cavity.
3, pay as the described pressure lubrication piston of above-mentioned claim 1, it is characterized in that passage is located on the cylinder body, the annular space communicates with piston cavity.
4, pay as the described pressure lubrication piston of above-mentioned claim 1, it is characterized in that passage is located on the cylinder body, the annular space communicates with the ambient pressure oil sources.
5, pay as above-mentioned claim 1 or 2 or 3 or 4 described pressure lubrication pistons, it is characterized in that said passage can be one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92213231 CN2136894Y (en) | 1992-02-18 | 1992-02-18 | Pressure lubricating piston pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92213231 CN2136894Y (en) | 1992-02-18 | 1992-02-18 | Pressure lubricating piston pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2136894Y true CN2136894Y (en) | 1993-06-23 |
Family
ID=33763517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92213231 Expired - Fee Related CN2136894Y (en) | 1992-02-18 | 1992-02-18 | Pressure lubricating piston pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2136894Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373059C (en) * | 2006-04-27 | 2008-03-05 | 中冶连铸技术工程股份有限公司 | Hydraulic cylinder with static pressure support guide |
| CN101349165B (en) * | 2008-07-28 | 2010-06-30 | 韩晓静 | Suspending piston connecting bar system |
| CN110260006A (en) * | 2019-05-24 | 2019-09-20 | 南通市中京机械有限公司 | A kind of back-pressure valve |
| CN111637112A (en) * | 2020-06-12 | 2020-09-08 | 郑州磨料磨具磨削研究所有限公司 | Ultra-high pressure sealing device for piston and oil cylinder of cubic press |
-
1992
- 1992-02-18 CN CN 92213231 patent/CN2136894Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100373059C (en) * | 2006-04-27 | 2008-03-05 | 中冶连铸技术工程股份有限公司 | Hydraulic cylinder with static pressure support guide |
| CN101349165B (en) * | 2008-07-28 | 2010-06-30 | 韩晓静 | Suspending piston connecting bar system |
| CN110260006A (en) * | 2019-05-24 | 2019-09-20 | 南通市中京机械有限公司 | A kind of back-pressure valve |
| CN111637112A (en) * | 2020-06-12 | 2020-09-08 | 郑州磨料磨具磨削研究所有限公司 | Ultra-high pressure sealing device for piston and oil cylinder of cubic press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |