CN2168128Y - Maintainless hydraulic sealing device - Google Patents
Maintainless hydraulic sealing device Download PDFInfo
- Publication number
- CN2168128Y CN2168128Y CN 93218908 CN93218908U CN2168128Y CN 2168128 Y CN2168128 Y CN 2168128Y CN 93218908 CN93218908 CN 93218908 CN 93218908 U CN93218908 U CN 93218908U CN 2168128 Y CN2168128 Y CN 2168128Y
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- sealing
- piston
- ring
- 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)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a sealing device for single hydraulic props, comprising a sealing ring 1, an anti-extrusion ring, and a piston 3. The sealing ring is provided with a hollow cavity 4, and radial holes 5 which are distributed uniformly are arranged on the piston tube wall corresponding the hollow cavity of the sealing ring. When liquid flows in, the hydraulic pressure extrudes the sealing ring along the radial direction from the groove 6 of the sealing ring, and the hollow cavity 4 to a cylinder block to achieve the sealing purpose. The utility model has the advantages of favorable sealing performance, convenient use, and no maintenance generally.
Description
The utility model relates to seal arrangement, is a kind of hydraulic seal device that is used for hydraulic prop.
At present, the hydraulic seal device that is used for hydraulic prop, its seal ring section is the Y type, hydraulic pressure is after the groove 6 of seal ring, seal ring is subjected to crowded and presses cylinder body, form linear sealing, the sealability of this linear sealing is not fine, as long as the cylinder body top layer has corrosion slightly, just do not reach seal request, for this reason, all there are every year large quantities of hydraulic props to need to safeguard, have quite a few cylinder body to need to electroplate.
The non-maintaining hydraulic seal device that the purpose of this utility model need not to keep in repair after being to provide a kind of cylinder body of being sealed into face seal of relocating to be corroded.
The purpose of this utility model reaches like this:
Non-maintaining hydraulic seal device comprises seal ring 1, anti-extrusion ring 2, and piston 3 is characterized in that having in the seal ring cavity 4, on the piston tube wall corresponding with the seal ring cavity, has uniform radial hole 5.
Advantage of the present utility model and good effect mainly are to improve sealability, reduce maintenance expenses, reduce production costs.
Fig. 1 is non-maintaining hydraulic seal device sectional drawing, and 1 is seal ring, and 2 is anti-extrusion ring, and 3 is piston, and 4 is cavity, and 5 is radial hole, and 6 is groove, and the arrow points liquid medium flows to.
Be described further below in conjunction with drawings and Examples:
Non-maintaining hydraulic seal device comprises seal ring 1, anti-extrusion ring 2, piston 3.Seal ring is a rubber product, external diameter 100mm, and internal diameter 78mm, its groove 6 sections are half garden shape, and radius is 2.5mm, and its cavity 4 degree of depth are 11mm, and wide is 3mm, is installed in the head of piston 3.Piston is made by No. 45 steel, and on the tube wall corresponding with the seal ring cavity, having diameter is 16 uniform radial holes of 1.5mm.Anti-extrusion ring is plastic article.When liquid when the direction of arrow flows into, flow to the cavity of seal ring on the one hand by radial hole, form radially the outwards strength of extruding, on the other hand, flow to the groove of seal ring, form the termination of the seal ring outside strength of extruding radially.Because the effect of these two bursts of strength makes original linear sealing change into face seal, thereby has improved sealability.
Claims (1)
1, non-maintaining hydraulic seal device comprises seal ring 1, anti-extrusion ring 2, and piston 3 is characterized in that having in the seal ring cavity 4, on the piston tube wall corresponding with the seal ring cavity, has equally distributed radial hole 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93218908 CN2168128Y (en) | 1993-07-20 | 1993-07-20 | Maintainless hydraulic sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93218908 CN2168128Y (en) | 1993-07-20 | 1993-07-20 | Maintainless hydraulic sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2168128Y true CN2168128Y (en) | 1994-06-08 |
Family
ID=33798442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93218908 Expired - Fee Related CN2168128Y (en) | 1993-07-20 | 1993-07-20 | Maintainless hydraulic sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2168128Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410116A (en) * | 2019-08-05 | 2019-11-05 | 重庆工程职业技术学院 | Hydraulic prop sealing ring |
-
1993
- 1993-07-20 CN CN 93218908 patent/CN2168128Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410116A (en) * | 2019-08-05 | 2019-11-05 | 重庆工程职业技术学院 | Hydraulic prop sealing ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |