CN209800420U - Anti mud hydro-cylinder seal structure under heavy load - Google Patents
Anti mud hydro-cylinder seal structure under heavy load Download PDFInfo
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- CN209800420U CN209800420U CN201920611515.3U CN201920611515U CN209800420U CN 209800420 U CN209800420 U CN 209800420U CN 201920611515 U CN201920611515 U CN 201920611515U CN 209800420 U CN209800420 U CN 209800420U
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Abstract
the utility model discloses an anti mud hydro-cylinder seal structure under heavy load belongs to pneumatic cylinder technical field. The guide sleeve comprises a main guide sleeve and a split guide sleeve, and a supporting area, a main sealing impact-resistant area and a dust-proof area are arranged in the guide sleeve; the supporting area comprises a supporting ring, a first guide ring and a second guide ring; the main sealing impact-resistant area comprises a Stent seal and a Y-shaped sealing ring, and the Y-shaped sealing ring and the first guide ring are arranged in the same mounting groove; the dustproof area comprises a dirt receiving ring and a dustproof ring, and the placing grooves of the dirt receiving ring and the dustproof ring are communicated through a dust collecting groove. The utility model provides a uniform holding force for the rod body by uniformly arranging the supporting ring and 2 guide rings, and relieves the seal abrasion under heavy load; the Y-shaped sealing ring and the first guide ring form an anti-extrusion sealing mode, so that alternating load impact can be effectively resisted; the three dirt containing structures and the dust collection groove of the main guide sleeve can improve the operation reliability of the oil cylinder under severe environments such as slurry and the like; the cylinder does not need to be disassembled during regular maintenance, and the maintenance cost is effectively reduced.
Description
Technical Field
The utility model relates to a pneumatic cylinder technical field specifically is an anti mud hydro-cylinder seal structure under heavy load.
background
The oil cylinder of the piling machinery has more complex working conditions compared with the oil cylinders of other machinery, so the oil leakage feedback rate of the guide sleeve is extremely high. When the power head of the main engine meets hard rocks and is forced to run under heavy load and generate high-pressure impact, the sealing abrasion of the oil cylinder fails after a long time, and the piston rod body is directly damaged by pulling. In the market, some manufacturers adopt a mode of adding a supporting ring before a main seal, but the problems of uneven supporting stress and seal abrasion cannot be solved. In addition, the series of oil cylinders are used for slurry operation, once the rod body is stained with slurry, the rod body becomes hard and is not easy to remove after being solidified. When the piston rod is retracted, the hard mud blocks damage the seal in the guide sleeve, so that the piston rod contains oil. Most of slurry can be scraped after metal is added for dust prevention by an existing manufacturer, once a main seal is directly damaged due to dust prevention failure, a sealing piece needs to be integrally replaced, the maintenance cost is high, the dismounting time is long, and the working period of a client is influenced.
For example, a rotary drilling mast oil cylinder (CN 205895749U) disclosed in chinese patent, as shown in fig. 3, 5 belt-shaped support rings, a steckel seal, a support ring, a Y-ring, and a double-lip dust-proof are sequentially placed in a guide sleeve from a small cavity. In the practical application process, the following disadvantages exist:
1, a plurality of strip-shaped supporting rings are adopted in a centralized manner, so that the supporting force and the dynamic friction force are increased, the flexibility of a rod body is neglected, and when a lateral force is borne, the uniform surrounding force cannot be provided by sealing, so that the abrasion is accelerated, and the sealing failure is accelerated;
Although the Stent seal in the main seal can effectively relieve pressure impact, a check ring is not arranged behind the Y ring, so that the main seal is easily extruded under alternating pressure, and the seal failure is caused;
3, the lip is dustproof although can play certain dustproof effect, nevertheless can't strike off stereoplasm mud for a long time, in case dustproof inefficacy, the main seal directly faces the damage, and the change is higher with cost of maintenance this moment.
Disclosure of Invention
in order to solve the technical problem, the utility model provides an anti mud hydro-cylinder seal structure under heavy load.
the utility model discloses a following technical scheme realizes: a mud-resistant oil cylinder sealing structure under heavy load comprises a piston rod and a guide sleeve; the inner wall of the guide sleeve is provided with a supporting area, a main sealing impact-resistant area and a dust-proof area; the guide sleeve comprises a main guide sleeve, and the outer end of the main guide sleeve is detachably connected with a split guide sleeve; the supporting area comprises a supporting ring, a first guide ring and a second guide ring, wherein the supporting ring and the first guide ring are sequentially arranged on the inner wall of the main guide sleeve from inside to outside, and the second guide ring is arranged on the inner wall of the split guide sleeve; the main sealing impact resistant area comprises a Stent seal and a Y-shaped sealing ring which are sequentially arranged on the inner wall of the main guide sleeve from inside to outside; the Y-shaped sealing ring and the first guide ring are arranged in the same mounting groove on the inner wall of the main guide sleeve, and the outer side of the Y-shaped sealing ring is abutted against the inner end of the first guide ring; the dust-proof area comprises a dirt receiving ring and a dust-proof ring which are sequentially arranged on the inner wall of the main guide sleeve from inside to outside; the dust ring is located the outside of main guide cover inner wall, receives dirty ring and is located the inboard of dust ring, receives dirty ring, dust ring's standing groove and communicates through seting up the dirt groove on main guide cover inner wall.
it further comprises the following steps: the split guide sleeve is sleeved on the step at the outer end of the main guide sleeve and is fixedly connected with the step at the outer end of the main guide sleeve through a screw; and a diversion hole is formed in the middle of the split guide sleeve, and the inner end of the diversion hole is positioned between the dust ring and the second guide ring.
The supporting rings are formed C380 supporting rings, and the number of the supporting rings is three; the first guide ring and the second guide ring are made of materials softer than the material of the supporting ring.
Compared with the prior art, the beneficial effects of the utility model are that:
heavy load, low wear: the C380 supporting ring and 2 guide rings are uniformly arranged and molded to provide uniform holding force for the rod body, so that the sealing abrasion under heavy load is relieved;
2, good impact resistance: the Y-shaped sealing ring and the first guide ring form an anti-extrusion sealing mode, and the alternating load impact can be effectively resisted under the action of the Stent seal buffer;
3, effectively resisting severe environment intrusion such as mud: the three dirt receiving structures (the dirt receiving ring, the dust ring and the second guide ring) and the dust collection groove of the main guide sleeve can improve the operation reliability of the oil cylinder under severe environments such as slurry and the like;
4, easy maintenance, low maintenance cost: the cylinder does not need to be disassembled during regular maintenance, and only the second guide ring on the outer side is replaced, so that the dustproof effect of slurry operation can be guaranteed, and the damage probability and the maintenance cost of the main seal are effectively reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a cylinder sealing structure according to the background art;
in the figure: 1. a supporting ring; 2. performing steckel; 3. a Y-shaped seal ring; 4. a first guide ring; 5. a dirt containing ring; 6. a dust ring; 7. a second guide ring; 8. a main guide sleeve; 9. a split guide sleeve; 9-1, flow guide holes; 10. a piston rod; 11. a dust accumulation groove.
Detailed Description
the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the mud-resistant oil cylinder sealing structure under heavy load comprises a piston rod 10 and a guide sleeve, wherein a supporting area, a main sealing impact-resistant area and a dust-proof area are arranged on the inner wall of the guide sleeve. The guide sleeve comprises a main guide sleeve 8 and a split guide sleeve 9, the split guide sleeve 9 is sleeved on the step at the outer end of the main guide sleeve 8, and the split guide sleeve 9 is fixedly connected with the step at the outer end of the main guide sleeve 8 through a screw. The inner wall of the main guide sleeve 8 is provided with a supporting ring 1, a Stent seal 2, a Y-shaped sealing ring 3, a first guide ring 4, a dirt receiving ring 5 and a dust ring 6 in turn from inside to outside, and the inner wall of the split guide sleeve 9 is provided with a second guide ring 7.
the supporting area comprises a supporting ring 1, a first guide ring 4 and a second guide ring 7;
The supporting rings 1 are formed C380 supporting rings, and the number of the supporting rings is three; the first guide ring 4 and the second guide ring 7 are made of materials softer than the material of the support ring 1. In order to realize the aim of low abrasion under heavy sealing load, the main guide sleeve 8 is uniformly provided with sealing elements with supporting and guiding functions, and the three formed C380 supporting rings can achieve more uniform supporting effect compared with the common strip-shaped supporting ring. The first guide ring 4 and the second guide ring 7 can provide a permanent and reliable guide function, and the material of the first guide ring 4 and the second guide ring 7 is softer than that of a C380 supporting ring, so that the damage of lateral force can be effectively relieved, and the sealing abrasion speed is reduced.
the main sealing impact-resistant area comprises a Stent seal 2, a Y-shaped sealing ring 3 and a first guide ring 4;
the Y-shaped sealing ring 3 and the first guide ring 4 are arranged in the same mounting groove on the inner wall of the main guide sleeve 8, and the outer side of the Y-shaped sealing ring 3 is abutted to the inner end of the first guide ring 4. For realizing the function of shocking resistance, Y type sealing washer 3 and first guide ring 4 constitute the primary seal, place Y type sealing washer 3 and first guide ring 4 in same seal groove, can prevent effectively that the root of Y type sealing washer 3 from rubbing with the seal groove, causing sealed damage, reach the mesh of strengthening the sealing member and shocking resistance. And place the steckel seal 2 before the main seal, can effectively alleviate system's pressure, increase the life of the main seal of back, strengthen the sealed effect of main seal.
The dust-proof area comprises a dirt containing ring 5, a dust-proof ring 6 and a second guide ring 7;
Dust ring 6 is located the outside of 8 inner walls of main uide bushing, receives dirty ring 5, dust ring 6's standing groove and through seting up the laying dust groove 11 intercommunication on 8 inner walls of main uide bushing. A diversion hole 9-1 is formed in the middle of the split guide sleeve 9, and the inner end of the diversion hole 9-1 is positioned between the dust ring 6 and the second guide ring 7. In order to realize the sealing effect of resisting the slurry pollution, a second guide ring 7 is placed in the split guide sleeve 9 at the outermost end, and the slurry condensed by the rod body is removed by utilizing the uniform holding force of the second guide ring 7. And the second guide ring 7 is placed in the split guide sleeve 9, so that the second guide ring 7 can be replaced regularly without disassembling the cylinder, the damage probability of the main seal is reduced, and the maintenance cost is reduced. And the dust ring 6 outside the main guide sleeve 8 can continuously remove the slurry which is not scraped by the second guide ring 7. Can be completely cut off most pollutants outside sealing system through preceding twice dust keeper, if there is individual tiny granule adsorbable on receiving dirty ring 5 to receiving and having set up laying dust groove 11 between dirty ring 5 and dust ring 6, also can effectively keep apart the particulate matter. Through these three dust keeper, can guarantee when the mud operation, the performance of main seal is not influenced by external environment, guarantees sealed normal work.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A mud-resistant oil cylinder sealing structure under heavy load comprises a piston rod (10) and a guide sleeve; the method is characterized in that:
The inner wall of the guide sleeve is provided with a supporting area, a main sealing impact-resistant area and a dust-proof area;
the guide sleeve comprises a main guide sleeve (8), and the outer end of the main guide sleeve (8) is detachably connected with a split guide sleeve (9);
The supporting area comprises a supporting ring (1) and a first guide ring (4) which are sequentially arranged on the inner wall of the main guide sleeve (8) from inside to outside, and a second guide ring (7) which is arranged on the inner wall of the split guide sleeve (9);
The main sealing impact resistant area comprises a Stent seal (2) and a Y-shaped sealing ring (3) which are sequentially arranged on the inner wall of the main guide sleeve (8) from inside to outside; the Y-shaped sealing ring (3) and the first guide ring (4) are arranged in the same mounting groove on the inner wall of the main guide sleeve (8), and the outer side of the Y-shaped sealing ring (3) is abutted against the inner end of the first guide ring (4);
The dust-proof area comprises a dirt receiving ring (5) and a dust-proof ring (6) which are sequentially arranged on the inner wall of the main guide sleeve (8) from inside to outside; dust ring (6) are located the outside of main uide bushing (8) inner wall, receive dirty ring (5) and are located the inboard of dust ring (6), receive the standing groove of dirty ring (5), dust ring (6) and through seting up laying on main uide bushing (8) inner wall dirt groove (11) intercommunication.
2. The mud cylinder sealing structure under heavy load of claim 1, characterized in that: the split guide sleeve (9) is sleeved on the step at the outer end of the main guide sleeve (8), and the split guide sleeve (9) is fixedly connected with the step at the outer end of the main guide sleeve (8) through a screw; a diversion hole (9-1) is formed in the middle of the split guide sleeve (9), and the inner end of the diversion hole (9-1) is located between the dust ring (6) and the second guide ring (7).
3. The mud cylinder sealing structure under heavy load of claim 1, characterized in that: the supporting rings (1) are formed C380 supporting rings, and the number of the supporting rings is three; the first guide ring (4) and the second guide ring (7) are made of materials softer than the material of the support ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611515.3U CN209800420U (en) | 2019-04-30 | 2019-04-30 | Anti mud hydro-cylinder seal structure under heavy load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920611515.3U CN209800420U (en) | 2019-04-30 | 2019-04-30 | Anti mud hydro-cylinder seal structure under heavy load |
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| Publication Number | Publication Date |
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| CN209800420U true CN209800420U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920611515.3U Active CN209800420U (en) | 2019-04-30 | 2019-04-30 | Anti mud hydro-cylinder seal structure under heavy load |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608984A (en) * | 2020-06-02 | 2020-09-01 | 徐州徐工液压件有限公司 | Oil cylinder guiding and sealing system suitable for mine dust and humid environment |
| CN112727840A (en) * | 2020-12-10 | 2021-04-30 | 上海唯万密封科技股份有限公司 | Large-tonnage loader oil cylinder sealing system |
-
2019
- 2019-04-30 CN CN201920611515.3U patent/CN209800420U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608984A (en) * | 2020-06-02 | 2020-09-01 | 徐州徐工液压件有限公司 | Oil cylinder guiding and sealing system suitable for mine dust and humid environment |
| CN112727840A (en) * | 2020-12-10 | 2021-04-30 | 上海唯万密封科技股份有限公司 | Large-tonnage loader oil cylinder sealing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Jianuo Sealing Technology Co.,Ltd. Assignor: XCMG XUZHOU XUGONG HYDRAULIC PARTS Co.,Ltd. Contract record no.: X2020320000395 Denomination of utility model: A sealing structure of anti mud oil cylinder under heavy load Granted publication date: 20191217 License type: Common License Record date: 20201225 |
|
| EE01 | Entry into force of recordation of patent licensing contract |