CN202746594U - Piston rod sealing device - Google Patents
Piston rod sealing device Download PDFInfo
- Publication number
- CN202746594U CN202746594U CN 201220289659 CN201220289659U CN202746594U CN 202746594 U CN202746594 U CN 202746594U CN 201220289659 CN201220289659 CN 201220289659 CN 201220289659 U CN201220289659 U CN 201220289659U CN 202746594 U CN202746594 U CN 202746594U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- ring
- sealing
- guide sleeve
- seal ring
- 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 discloses a piston rod sealing device, which comprises an O-shaped ring, a Yx sealing ring, a protecting ring, a guide sleeve and a piston rod, wherein the O-shaped ring is arranged in the protecting ring, the protecting ring and the Yx sealing ring are respectively arranged in the guide sleeve, the Yx sealing ring, the protecting ring and the guide sleeve are respectively arranged on the piston rod, the O-shaped ring is a polytetrafluoroethylene O-shaped ring, and the Yx sealing ring is a polytetrafluoroethylene Yx sealing ring. The mechanical sealing is realized by the Yx sealing ring and the O-shaped ring, and the effect on shafts and medium is less The piston rod sealing device has the advantages that the structure is simple, the manufacture cost is low, and the installation is convenient.
Description
Technical field
The utility model relates to a kind of seal arrangement, relates in particular to a kind of piston rod seal.
Background technique
At present, a large amount of oil sealings that adopt directly carry out interference fit and realize motive sealing with running shaft, and its coaxality to running shaft, size deviation, out of roundness, surface roughness etc. have very strict requirement.The coaxality size of axle directly affects the distribution of oil sealing lip contact stress, usually requires at 0.3mm, and the diameter of axle is 50-80mm, and the oil sealing linear velocity is in 10-15m/s, yet is difficult under many circumstances accomplish.
The size deviation of axle can affect sealing effect, the contact load of excessive axle meeting layer frame lip end, and too small axle then can make the sealing load on the lip end in contact face inadequate.Contact is crossed conference and is impelled the sealing premature failure, and contact is too small then can to cause leakage.
Thereby the out of roundness of axle makes elastomeric lip produce rapid variation of oil slick thickness according to the irrgular movement of axle possibly causes that sealing pair leaks.
The roughness General provisions of axle is Ra1.6-3.2 μ m, and the surface is too smooth to be unfavorable for forming and the maintenance oil film, the seal ring dry friction, and easily burn causes leakage; The axle surface is too coarse, and the fretting wear aggravation can cause oil sealing early failue equally.
Aspect installing and using, must reach the standard grade at oil seal lip before installing and be coated with a little lubricating grease, owing to sealed lip has a magnitude of interference with respect to axle, must be noted that during installation and prevent such as the reversing, extrude of sealed lip, when axle head is not with circular cone.Fillet and when screw thread is arranged is with regard to more it should be noted that otherwise easily lip is scratched and affect sealing effect.
Existing oil sealing is responsive to the damage on axle surface, and very slight damage all might produce greatly impact to its sealing effect and operating life, even directly brings leakage.
Summary of the invention
The purpose of this utility model provides a kind of piston rod seal with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises O shape circle, Yx seal ring, guard circle, guide sleeve and piston rod; described O shape circle is installed in the described guard circle; described guard circle and described Yx seal ring all are installed in the described guide sleeve, and described Yx seal ring, described guard circle and described guide sleeve all are installed on the described piston rod.
Further, described O shape circle is teflon O shape circle, and described Yx seal ring is teflon Yx seal ring.
The beneficial effects of the utility model are:
The utility model is realized mechanical seal by Yx seal ring and O shape circle, and is less on the impact of axle and medium; The utlity model has advantage simple in structure, that cost is low and easy for installation.
Description of drawings
Fig. 1 is the sectional view of piston rod seal described in the utility model;
1-piston rod among the figure, 2-guard circle, 3-teflon O shape circle, 4-teflon Yx seal ring, 5-guide sleeve.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1; the utility model comprises teflon O shape circle 3, teflon Yx seal ring 4, guard circle 2, guide sleeve 5 and piston rod 1; teflon O shape circle 3 is installed in the guard circle 2; guard circle 2 all is installed in the guide sleeve 5 with teflon Yx seal ring 4, and teflon Yx seal ring 4, guard circle 2 and guide sleeve 5 all are installed on the piston rod 1.
Claims (2)
1. piston rod seal; it is characterized in that: comprise O shape circle, Yx seal ring, guard circle, guide sleeve and piston rod; described O shape circle is installed in the described guard circle; described guard circle and described Yx seal ring all are installed in the described guide sleeve, and described Yx seal ring, described guard circle and described guide sleeve all are installed on the described piston rod.
2. piston rod seal according to claim 1 is characterized in that: described O shape circle is teflon O shape circle, and described Yx seal ring is teflon Yx seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289659 CN202746594U (en) | 2012-06-20 | 2012-06-20 | Piston rod sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220289659 CN202746594U (en) | 2012-06-20 | 2012-06-20 | Piston rod sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746594U true CN202746594U (en) | 2013-02-20 |
Family
ID=47705993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220289659 Expired - Fee Related CN202746594U (en) | 2012-06-20 | 2012-06-20 | Piston rod sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613174A (en) * | 2015-01-30 | 2015-05-13 | 柳州市莫尔斯汽配制造有限公司 | High-sealing type sealing ring |
-
2012
- 2012-06-20 CN CN 201220289659 patent/CN202746594U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104613174A (en) * | 2015-01-30 | 2015-05-13 | 柳州市莫尔斯汽配制造有限公司 | High-sealing type sealing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20130620 |