CN2390055Y - Hydraulic cylinder sealing device - Google Patents
Hydraulic cylinder sealing device Download PDFInfo
- Publication number
- CN2390055Y CN2390055Y CN 99213609 CN99213609U CN2390055Y CN 2390055 Y CN2390055 Y CN 2390055Y CN 99213609 CN99213609 CN 99213609 CN 99213609 U CN99213609 U CN 99213609U CN 2390055 Y CN2390055 Y CN 2390055Y
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- leakage
- annular groove
- utility
- model
- 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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- Sealing Devices (AREA)
Abstract
The utility model belongs to the field of hydraulic drive, which is particularly relates to a device for reducing the leakage amount of a closed container and particularly a device for reducing the leakage amount of a hydraulic cylinder. The utility model is characterized in that an annular groove is arranged on the side of an upper high pressure cavity on a stopper body, and a hole which is drilled on the right end surface of the stopper body is communicated with the annular groove. Through the drilled hole, lubricating grease with certain pressure is filled in the annular groove and is sealed by a small plunger piston. The utility model has the advantages of simple structure and convenient operation and has the advantages that leakage is effectively reduced (or zero leakage is realized), and a corresponding structure and corresponding equipment are simplified.
Description
The utility model belongs to the hydraulic transmission field, is specifically related to reduce the particularly device of oil hydraulic cylinder leakage rate of seal container.
Oil hydraulic cylinder can change hydraulic pressure into mechanical energy, makes the hydraulic actuator of straight reciprocating motion or oscillating motion.Can make the volumetric efficiency reduction of oil hydraulic cylinder when taking place to leak and make the fluid heating, external leakage also pollutes the environment.Leak and can have influence on the service behaviour of oil hydraulic cylinder when serious, even make the oil hydraulic cylinder cisco unity malfunction, therefore adopting the suitable seal device to reduce and preventing to leak is important problem very in the cylinder design.
To the requirement of hydraulic cylinder sealing device can be summarized as following some: 1, good sealing property, promptly leakage rate as far as possible less even do not have; 2, motion sealing part surface friction drag is little; 3, Sealing should have good wear resistance, promptly guarantees enough life-spans; 4, Sealing and hydraulic oil have good compatibility; 5, simple in structure; Good manufacturability.The utility model seal arrangement can satisfy above usage requirement.
At present, hydraulic cylinder sealing is slit seal or contact seal, and accounts for the overwhelming majority with the latter.Contact seal is a Sealing of making different shape with multiple material, places to require sealing part, high-pressure medium in the oil hydraulic cylinder and low piezodielectric is separated, to reach the purpose of anti-leak.
According to NBS, allow oil hydraulic cylinder to have small inside and outside leakage, its allowance 1 (calculating) of seeing attached list with per ten minutes oil hydraulic cylinder settling amount 1mm.But along with oil hydraulic cylinder uses the continuous expansion in field, some oil hydraulic cylinder requires the twenty four hours settling amount less than 1mm; And general hydraulic system allows ten minutes pressure drop 3MPa, and demanding, one day twenty four hours only allows the leakage rate of 1MPa.Present seal form can't satisfy these requirements.
The purpose of this utility model provides a kind of hydraulic cylinder sealing device, greatly to reduce leakage rate.
Its objective is such realization: the hyperbaric chamber side is opened an annular groove on cock body, and boring communicates with annular groove in the cock body right side, by the lubricating grease of boring filling certain pressure in groove, and seals with small plunger.Utilize leakage rate to be inversely proportional to the principle of the viscosity of medium, promptly the viscosity of general high viscosity lubricating grease is more than 100 times of normal hydraulic oil, so leakage rate can be reduced to below one of original percentage.
The utility model is simple in structure, and is easy to operate, can reduce the leakage rate of oil hydraulic cylinder effectively, even reach zero leakage, thereby simplify corresponding structure and corollary equipment.
Below in conjunction with accompanying drawing the utility model is described in detail:
Fig. 1 is the related hydraulic cylinder sealing apparatus structure schematic representation of the utility model.
As shown in Figure 1, be provided with Sealing 5 on the cock body 2 in hydraulic cylinder body 1, the hyperbaric chamber side is opened an annular groove 4 on cock body 2, and boring communicates with groove in cock body 2 right sides, and seals with small plunger 3.In groove, fill the lubricating grease of certain pressure by boring circular hole, in the gap of lubricating grease indentation sealing spare.The injection of lubricating grease, with about the working medium in two chambeies isolate fully, working medium has only by this grease layer just can produce leakage.
The utility model is applicable to piston type or plunger type cylinder seal arrangement.
Subordinate list 1
JB/JQ20301-88
Unit: mL
| Certified products | Grade A | ||||||
| Cylinder bore | Internal leakage | Cylinder bore | Internal leakage | Cylinder bore | Interior discharge leaks | Cylinder bore | Internal leakage |
| D | qv | D | qv | D | qv | D | qv |
| 40 | 0.03 | 125 | 0.28 | 40 | 0.03 | 125 | 0.28 |
| 50 | 0.05 | 140 | 0.30 | 50 | 0.05 | 140 | 0.30 |
| 63 | 0.08 | 160 | 0.50 | 63 | 0.08 | 160 | 0.50 |
| 80 | 0.13 | 180 | 0.63 | 80 | 0.13 | 180 | 0.63 |
| 90 | 0.15 | 200 | 0.70 | 90 | 0.15 | 200 | 0.70 |
| 100 | 0.20 | 220 | 1.00 | 100 | 0.20 | 220 | 1.00 |
| 110 | 0.22 | 250 | 1.10 | 110 | 0.22 | 250 | 1.10 |
Annotate: allow internal leakage to be 2 times of setting when using combination sealing.
Claims (1)
1, a kind of hydraulic cylinder sealing device, comprise cylinder body, cock body and Sealing, it is characterized in that: go up the hyperbaric chamber side at described cock body (2) and open an annular groove (4), boring communicates with annular groove (4) in cock body (2) right side, in groove, fill the lubricating grease of certain pressure by holing, and seal with small plunger (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213609 CN2390055Y (en) | 1999-06-07 | 1999-06-07 | Hydraulic cylinder sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99213609 CN2390055Y (en) | 1999-06-07 | 1999-06-07 | Hydraulic cylinder sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2390055Y true CN2390055Y (en) | 2000-08-02 |
Family
ID=34005972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99213609 Expired - Fee Related CN2390055Y (en) | 1999-06-07 | 1999-06-07 | Hydraulic cylinder sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2390055Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015581A (en) * | 2016-04-09 | 2016-10-12 | 侯宝旺 | Novel hydraulic sealing method |
-
1999
- 1999-06-07 CN CN 99213609 patent/CN2390055Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015581A (en) * | 2016-04-09 | 2016-10-12 | 侯宝旺 | Novel hydraulic sealing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Shougang Co., Ltd. Assignor: Capital Iron & Steel General Company Contract fulfillment period: The time limit for performance of the contract shall be 7 years on June 8, 2009 and the patent expires Contract record no.: Contract filing No. 200210042 Denomination of utility model: The utility model relates to a sealing device for a hydraulic cylinder Granted publication date: 20000802 License type: License type exclusive Record date: 20020603 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.6.8, 7 YEARS, EXPIRATION OF PATENT RIGHT Name of requester: BEIJING SHOUDU STEEL CO., LTD. Effective date: 20020603 |
|
| 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 |