CN201944253U - Piston sealing structure - Google Patents
Piston sealing structure Download PDFInfo
- Publication number
- CN201944253U CN201944253U CN201020679927XU CN201020679927U CN201944253U CN 201944253 U CN201944253 U CN 201944253U CN 201020679927X U CN201020679927X U CN 201020679927XU CN 201020679927 U CN201020679927 U CN 201020679927U CN 201944253 U CN201944253 U CN 201944253U
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- CN
- China
- Prior art keywords
- piston
- seal ring
- sealing structure
- seal groove
- air inlet
- 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 discloses a piston sealing structure which comprises a sealing ring groove opened on the piston and a sealing ring arranged in the sealing ring groove. The piston is also provided with a plurality of air channels communicating the sealing ring groove with an air chamber. The piston sealing structure can lower accuracy requirement of the sealing ring while ensuring good sealing effects, simplifies assembling process, and enhances assembling reliability.
Description
Technical field
The utility model relates to piston sealing structure, relates in particular to a kind of piston sealing structure.
Background technique
The clutch of large-scale forging and pressing bedding, brake plunger generally adopt large-scale y-type seal ring to seal.Existing sealing means is: the size according to y-type seal ring processes y-type seal ring groove 11 on piston 10 cylindricals, the y-type seal ring 12 of packing into then, as depicted in figs. 1 and 2, then the piston that installs seal ring 12 is put into cylinder (figure does not show), after the air chamber ventilation, the pressurized air that enters from suction port 13 blows the lip limit of y-type seal ring 12 open along the gap 14 between cylinder casing wall and the piston 10, thereby forms sealed gas chamber with the cylinder casing wall.Because piston diameter is very big and the action frequency is very high, so the requirement of the quality of seal ring and assembly precision is also very high: not only require seal ring lip limit not have breakage, and when assembling, can not have some flange trend.In order to improve the reliability of clutch, break, what most of lathe piston seals all adopted is the high-precision seal ring of import, and has formulated the step of very detailed, loaded down with trivial details assembling and inspection seal ring, not only time-consuming, and sealing effect is also undesirable, and maintenance expenses is high.Therefore, demand urgently providing a kind of improved piston sealing structure to overcome above-mentioned defective.
The model utility content
The technical problems to be solved in the utility model is to provide a kind of piston sealing structure, and it can reduce the required precision to seal ring when guaranteeing sealing effect, and simplifies assembly process, improves the reliability of assembling.
In order to solve the problems of the technologies described above, the utility model provides a kind of piston sealing structure, it comprises the seal groove that is opened on the piston and is located at seal ring in the described seal groove, also offers a plurality of gas-entered passageways that described seal groove is connected with air chamber on the described piston.
Compared with prior art, the utility model piston sealing structure is by offering a plurality of gas-entered passageways that described seal groove is connected with air chamber on piston, make that seal ring can automatic capturing after assembling ventilation, and be suspended in the described seal groove, the lateral lip limit of seal ring tightly is attached on the sidewall of seal groove, the bottom of seal ring tightly is attached on the cylinder wall, and this structure has strengthened sealing effect greatly.And because the lip limit of seal ring can be opened centering automatically, thus the geometric accuracy and the matching requirements of seal ring are all decreased, thus effectively reduce cost, and reduced the gas leakage that causes because of the assembly problem generation of phenomenon of doing over again, thus engineering time saved.
Further, described gas-entered passageway comprises first air inlet blind hole of offering from described air chamber side and the second air inlet blind hole of offering from the bottom land of described seal groove, and the described first air inlet blind hole is connected with the second air inlet blind hole, and this structure is convenient to machine shaping.
Preferably, described seal ring is a y-type seal ring, and the opening of described y-type seal ring is facing to the bottom land of described seal groove, with the reliability of the sealing configuration that improves main equipment.
By following description also in conjunction with the accompanying drawings, it is more clear that the utility model will become, and these accompanying drawings are used to explain embodiment of the present utility model.
Description of drawings
Fig. 1 is the structural representation of existing piston sealing configuration.
Fig. 2 is the structure for amplifying schematic representation of the I part of piston sealing structure shown in Figure 1.
Fig. 3 uses the main TV structure schematic representation of the piston of piston sealing structure of the present utility model.
Fig. 4 is the sectional structure schematic representation along the A-A face of piston shown in Figure 3.
Fig. 5 is the structure for amplifying schematic representation of piston I part shown in Figure 4.
Embodiment
With reference now to accompanying drawing, describe embodiment of the present utility model, the similar elements label is represented similar elements in the accompanying drawing.As mentioned above, the utility model provides a kind of piston sealing structure, and it can reduce the required precision to seal ring when guaranteeing sealing effect, and simplifies assembly process, improves the reliability of assembling.
Elaborate the utility model embodiment's technological scheme below in conjunction with accompanying drawing.As shown in Figure 3 and Figure 4, the piston sealing structure of present embodiment comprises the seal groove that is opened on the piston 20 21 and is located at y-type seal ring 22 in the described seal groove, also offers a plurality of gas-entered passageways 23 that have the bottom land with described seal groove 21 to be connected with air chamber on the described piston 20.The opening of described y-type seal ring 22 is facing to the bottom land of described seal groove 21.
Further, in conjunction with Fig. 5, described gas-entered passageway 23 comprises first air inlet blind hole 23a that offers from described air chamber side and the second air inlet blind hole 23b that offers from the bottom land of described seal groove 21, and the described first air inlet blind hole 23a is connected with the second air inlet blind hole 23b.
By aforementioned gas-entered passageway 23, when the air chamber air inlet, pressurized air just can pass through gap 24 and gas-entered passageway 23 respectively, thereby act on equably on the y-type seal ring 22, the lip limit of y-type seal ring 22 is opened and centering automatically, the lip limit of y-type seal ring 22 is close on the sidewall of seal groove 21, and the bottom of y-type seal ring 22 tightly is attached on the cylinder wall, this structure has strengthened sealing effect greatly, and can reduce the geometric accuracy requirement to y-type seal ring, and then saves cost.In addition, because pressurized air can blow the lip limit from the bottom land of seal groove 21 open, and seal ring 22 is suspended in the described seal groove 21, and then can correct flange trend small when assembling, simplify assembly process, and reduce the do over again generation of phenomenon of the gas leakage that causes because of assembly problem, save engineering time.
Obviously, piston sealing structure of the present utility model also is applicable to other seal ring, and is not limited only to y-type seal ring.
Claims (3)
1. a piston sealing structure comprises it is characterized in that seal groove that is opened on the piston and the seal ring of being located in the described seal groove, also offers a plurality of gas-entered passageways that described seal groove is connected with air chamber on the described piston.
2. piston sealing structure according to claim 1, it is characterized in that, described gas-entered passageway comprises first air inlet blind hole of offering from described air chamber side and the second air inlet blind hole of offering from the bottom land of described seal groove, and the described first air inlet blind hole is connected with the second air inlet blind hole.
3. piston sealing structure according to claim 1 and 2 is characterized in that, described seal ring is a y-type seal ring, and the opening of described y-type seal ring is facing to the bottom land of described seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020679927XU CN201944253U (en) | 2010-12-24 | 2010-12-24 | Piston sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020679927XU CN201944253U (en) | 2010-12-24 | 2010-12-24 | Piston sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944253U true CN201944253U (en) | 2011-08-24 |
Family
ID=44471596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020679927XU Expired - Fee Related CN201944253U (en) | 2010-12-24 | 2010-12-24 | Piston sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201944253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114847794A (en) * | 2022-04-13 | 2022-08-05 | 凯迪吸尘器（苏州）有限公司 | Filter assembly with self-cleaning function, cyclone separation assembly and vacuum cleaner |
-
2010
- 2010-12-24 CN CN201020679927XU patent/CN201944253U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114847794A (en) * | 2022-04-13 | 2022-08-05 | 凯迪吸尘器（苏州）有限公司 | Filter assembly with self-cleaning function, cyclone separation assembly and vacuum cleaner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20161224 |