CN201487208U - Seal mechanism of hydraulic cylinder - Google Patents
Seal mechanism of hydraulic cylinder Download PDFInfo
- Publication number
- CN201487208U CN201487208U CN2009202078344U CN200920207834U CN201487208U CN 201487208 U CN201487208 U CN 201487208U CN 2009202078344 U CN2009202078344 U CN 2009202078344U CN 200920207834 U CN200920207834 U CN 200920207834U CN 201487208 U CN201487208 U CN 201487208U
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- CN
- China
- Prior art keywords
- seal ring
- ring
- packing ring
- piston
- hydraulic cylinder
- 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 the field of hydraulic transmission, in particular to a seal mechanism capable of reducing the leakage rate of a hydraulic cylinder. The seal mechanism of the hydraulic cylinder is characterized in that a seal ring and a gasket are arranged in a ring-shaped groove on a piston; the gasket is provided with an inclined plane; and the seal ring and the gasket are made of elastic material. When pressure in the cylinder body increases, the force on the seal ring is transferred to the gasket, so that the gasket clings to the piston more closely, and the purpose of protecting the seal ring is achieved. Since one seal ring and one gasket are arranged in one ring-shaped groove, the utility model has the advantages of simple structure and convenient installation.
Description
Technical field
The utility model relates to the hydraulic transmission field, especially relates to a kind of sealing mechanism that reduces the oil hydraulic cylinder leakage rate.
Background technique
The seal arrangement that anti-leak is arranged between the cylinder body of oil hydraulic cylinder and the piston, especially the high pressure liquid cylinder pressure more needs the seal arrangement of favorable sealing property.As, the oil hydraulic cylinder of hydraulic bolt tensioning jack, the pressure during work is bigger, and the seal ring between cylinder body and the piston is easy to damage.In order to improve the working life of seal ring, the seal ring of high pressure liquid cylinder pressure often uses material elastic material preferably.Though the hardness that improves sealing ring material can strengthen the seal ring compression resistance.But the elasticity of seal ring and compression resistance are difficult to take into account.The seal ring that uses elastic caoutchouc or other flexible material to make, the gap between under high pressure easy excessive embedding cylinder body and the piston, and cause the severe wearing and tearing, had a strong impact on the working life of seal ring.
Summary of the invention
At the deficiencies in the prior art, the purpose of this utility model provides a kind of sealing mechanism of oil hydraulic cylinder, and it can prevent the gap between under high pressure excessive embedding cylinder body of seal ring and the piston, the working life that can improve seal ring.
The purpose of this utility model is achieved in that a kind of sealing mechanism of oil hydraulic cylinder, and 1 seal ring and 1 packing ring are arranged in the annular groove on the piston, and packing ring has the inclined-plane, and seal ring and packing ring are made by elastic material.
On the basis of technique scheme, the utility model also has following further scheme:
Described cylinder body is provided with annular groove, and 1 seal ring and 1 packing ring are arranged in the annular groove, and packing ring has the inclined-plane, and seal ring and packing ring are made by elastic material.
Described seal ring has the inclined-plane.
Described seal ring and packing ring are for dividing body structure.
Described seal ring and packing ring are structure as a whole.
Advantage of the present utility model is as follows:
Because, 1 seal ring and 1 packing ring are arranged in the annular groove on the piston, packing ring has the inclined-plane, and seal ring and packing ring are made by elastic material; The effect of packing ring is the protection seal ring.So; oil pressure increases to a certain degree in cylinder body; power on the seal ring is passed to the inclined-plane of packing ring; packing ring can be expanded under the promotion of seal ring; thereby can make the tightr contact cylinder body of packing ring; can prevent that seal ring from embedding the gap between piston and the cylinder body too much, and reach the purpose of protection seal ring.Since use 1 seal ring and 1 packing ring in the 1 road annular groove, not only simple in structure, and also easy for installation.The utility model reliable operation, the mechanism that helps simplifying the protection seal ring.
Description of drawings
Fig. 1 partly cuts open structural representation after the utility model part decomposes;
Fig. 2 is the structural representation that partly cuts open of the present utility model;
Fig. 3 partly cuts open structural representation after the piston portion part decomposes.
Embodiment
Below in conjunction with accompanying drawing in detail mode of execution of the present utility model is described in detail:
Described cylinder body and piston are cylinder body and the pistons that uses in the hydraulic transmission.As, the cylinder body and the piston that can use jack or other hydraulic transmission to use.Cylinder body among Fig. 3 is a jack cylinder body 301, and piston is a jack piston 300.Seal ring 6 and packing ring 4 are arranged between jack cylinder body 301 and the jack piston 300.Jack piston 300 is provided with annular groove 8, and annular groove 8 is embedded in 1 seal ring 6 and 1 packing ring 4, and the inclined-plane 5 on the packing ring 4 is a female cone, and axis of great circle is 85 millimeters, and axis of small circle is 70 millimeters, and the thickness of packing ring 4 is 5 millimeters.Packing ring 4 is close to the plane 11 on the jack piston 300, the inclined-plane 5 on seal ring 6 abut against washer 4.Seal ring 6 and packing ring 4 are made by elastic material.The material of making packing ring 4 is harder than the material of making seal ring 6, slightly flexible the getting final product of material of making packing ring 4.As, packing ring 4 uses materials such as slightly resilient teflon or nylon to make.Seal ring 6 uses soft relatively and more resilient oil resistant rubber or other material are made.After seal ring 6 binding washers 4, seal ring 6 can promote packing ring 4 and expand outwardly under the effect of oil pressure, thereby can make packing ring 4 tightr contact jack cylinder bodies 301.
Above-mentioned mode of execution only piston is provided with annular groove 8, seal ring 6 and packing ring 4.Referring to Fig. 1 and Fig. 2.The utility model can also be taked further step on the basis of above-mentioned mode of execution, promptly described cylinder body is provided with annular groove, and 1 seal ring 6 and 1 packing ring 4 are arranged in the annular groove, and packing ring 4 has inclined-plane 5, and seal ring 6 and packing ring 4 are made by elastic material.Seal ring is all arranged on the cylinder body of some hydraulic pressure installation and the piston.As, on the cylinder body of existing a kind of hydraulic bolt tensioning jack and the piston seal ring is arranged all.Piston among Fig. 1 and Fig. 2 is the hydraulic piston 7 of hydraulic bolt tensioning jack, and cylinder body is the hydraulic cylinder 1 of hydraulic bolt tensioning jack.Hydraulic piston 7 has guide rod 10, and guide rod 10 has the through hole 9 that runs through hydraulic piston 7, in the through hole 9 screw thread can be set, or insert conduit with threaded hole, and conduit has rotating disk.Annular groove 8 is arranged on the hydraulic piston 7, and annular groove 8 is embedded in 1 seal ring 6 and 1 packing ring 4, and packing ring 4 is close to the plane 11 on the hydraulic piston 7, the inclined-plane 5 of packing ring 4 is a female cone, axis of great circle is 85 millimeters, and axis of small circle is 70 millimeters, and the thickness of packing ring 4 is 5 millimeters.Also be provided with annular groove on the hydraulic cylinder 1, the annular groove on the hydraulic cylinder 1 is a groove 2, and groove 2 is a ring-type.Groove 2 is embedded in 1 seal ring 6 and 1 packing ring 4, and packing ring 4 is close to plane 3 on the hydraulic cylinder 1, and the inclined-plane 5 of packing ring 4 is an outer cone, and axis of great circle is 85 millimeters, and axis of small circle is 70 millimeters, and the thickness of packing ring 4 is 5 millimeters.The material of making packing ring 4 is harder than the material of making seal ring 6, slightly flexible the getting final product of material of making packing ring 4.As, packing ring 4 uses materials such as slightly resilient teflon or nylon to make, and seal ring 6 uses more soft and whippy oil-resistant rubber material to make.
All seal rings 6 in the above-mentioned mode of execution can also have following mode of execution:
All seal rings 6 in the above-mentioned mode of execution can be provided with inclined-plane 5, and promptly described seal ring 6 has inclined-plane 5.Inclined-plane 5 on the seal ring 6 is a conical surface, and axis of great circle is 85 millimeters, and axis of small circle is 70 millimeters, and the thickness of seal ring 6 is 5 millimeters.When seal ring 6 combines with packing ring 4, the inclined-plane 5 on the inclined-plane 5 applying packing rings 4 on the seal ring 6.
Described seal ring 6 and packing ring 4 are for dividing body structure.Seal ring 6 and packing ring 4 are separately made, and form 2 discerptible parts.
Described seal ring 6 and packing ring 4 are structure as a whole.Seal ring 6 uses the oil resistant rubber manufacturing, and packing ring 4 uses the nylon material manufacturing, and seal ring 6 passes through the bonding and formation integrative-structure of chemical adhesive with packing ring 4.
Claims (5)
1. the sealing mechanism of an oil hydraulic cylinder is characterized in that, 1 seal ring (6) and 1 packing ring (4) are arranged in the annular groove on the piston, and packing ring (4) has inclined-plane (5), and seal ring (6) and packing ring (4) are made by elastic material.
2. the sealing mechanism of a kind of oil hydraulic cylinder according to claim 1, it is characterized in that described cylinder body is provided with annular groove, 1 seal ring (6) and 1 packing ring (4) are arranged in the annular groove, packing ring (4) has inclined-plane (5), and seal ring (6) and packing ring (4) are made by elastic material.
3. the sealing mechanism of a kind of oil hydraulic cylinder according to claim 1 and 2 is characterized in that, described seal ring (6) has inclined-plane (5).
4. the sealing mechanism of a kind of oil hydraulic cylinder according to claim 1 is characterized in that, described seal ring (6) and packing ring (4) are for dividing body structure.
5. the sealing mechanism of a kind of oil hydraulic cylinder according to claim 1 is characterized in that, described seal ring (6) and packing ring (4) are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202078344U CN201487208U (en) | 2009-08-13 | 2009-08-13 | Seal mechanism of hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202078344U CN201487208U (en) | 2009-08-13 | 2009-08-13 | Seal mechanism of hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201487208U true CN201487208U (en) | 2010-05-26 |
Family
ID=42426087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202078344U Expired - Fee Related CN201487208U (en) | 2009-08-13 | 2009-08-13 | Seal mechanism of hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201487208U (en) |
-
2009
- 2009-08-13 CN CN2009202078344U patent/CN201487208U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Qinghua Document name: Patent certificate of utility model |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 200237, Room 401, No. 202, chemical 4 village, Lane 130, Meilong Road, Shanghai, Xuhui District Patentee after: Zhang Qinghua Address before: 200003 Shanghai city Minhang District Luoyang Road Luo Yang Village No. 111 Room 101 Patentee before: Zhang Qinghua |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20110813 |