CN210830462U - Sealing structure for oil cylinder and plunger of double-frame plate hydraulic press - Google Patents
Sealing structure for oil cylinder and plunger of double-frame plate hydraulic press Download PDFInfo
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- CN210830462U CN210830462U CN201921622101.7U CN201921622101U CN210830462U CN 210830462 U CN210830462 U CN 210830462U CN 201921622101 U CN201921622101 U CN 201921622101U CN 210830462 U CN210830462 U CN 210830462U
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- cylinder
- plunger
- sealing washer
- hydro
- frame plate
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- 238000007789 sealing Methods 0.000 title claims abstract description 42
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 10
- 238000012856 packing Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a seal structure of double-frame plate hydraulic press hydro-cylinder and plunger, including the cylinder of hydro-cylinder and with cylinder complex plunger, form the sealing washer mounting structure of step form on the outer disc of plunger, form sealing washer installation space between the sealing washer mounting structure of step form and the cylinder, install inner wall one side of the nearly cylinder of lower extreme of the last sealing washer of sealing washer mounting structure of step form forms the inclined plane structure of tilt up, be provided with the protecting washer that the cross-section is the triangle-shaped form between inclined plane structure and the cylinder to avoid the sealing washer to crowd into in the clearance of cylinder and plunger. The utility model discloses can avoid the oil leak of hydro-cylinder to take place.
Description
Technical Field
The utility model relates to a two frame plate hydraulic press technical field especially relate to a seal structure of two frame plate hydraulic press hydro-cylinders and plunger.
Background
In modern manufacturing industry, hydraulic presses of more than 3000T are required for processing metal sheets, and the metal sheets need high unit pressure when deformed, so that the working pressure of the press must be greatly increased. At present, domestic double-frame sheet hydraulic machines for forming occupy a large share in the compression forming process of civil plate heat exchangers. The cylinder barrel of the oil cylinder of the existing double-frame plate hydraulic machine is an elastic body, and the cylinder barrel expands along with the increase of the liquid pressure, so that the expansion amount of the cylinder body is a key parameter, the larger the expansion amount is, the larger the gap relative to a plunger is, and the larger the gap is, the poorer the sealing effect and the service life of the seal are. The technology adopted for preventing oil leakage is to install a sealing ring between a cylinder barrel and a plunger piston, but the existing sealing device has poor sealing effect and cannot completely prevent oil leakage. Therefore, improvements are necessary.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a seal structure of two frame plate hydraulic press hydro-cylinders and plunger to the technical defect who exists among the prior art.
For realizing the utility model discloses a technical scheme that the purpose adopted is:
the utility model provides a seal structure of double-frame plate hydraulic press hydro-cylinder and plunger, including the cylinder of hydro-cylinder and with cylinder complex plunger, form step-like sealing washer mounting structure on the outer disc of plunger, form sealing washer installation space between step-like sealing washer mounting structure and the cylinder, install the inner wall one side of the nearly cylinder of lower extreme of the last sealing washer of step-like sealing washer mounting structure forms the inclined plane structure of tilt up, be provided with the protecting washer that the cross-section is the triangle-shaped form between inclined plane structure and the cylinder to avoid the sealing washer to crowd into in the clearance of cylinder and plunger.
The outer side face of the protection washer is in sliding contact with the inner wall face of the cylinder barrel, the lower end face of the protection washer is in contact with the step face of the step-shaped sealing ring mounting structure, the gap between the cylinder barrel and the plunger is completely sealed and shielded above, and the inclined face of the protection washer is in contact with the inclined face structure.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an install the inner wall one side of the nearly cylinder of lower extreme of the last sealing washer of step form forms the inclined plane structure of tilt up, be provided with the protection packing ring that the cross-section is three horn shapes between inclined plane structure and the cylinder to avoid the sealing washer to extrude into in the clearance of cylinder and plunger, the emergence of the oil leak of hydro-cylinder can be avoided.
Drawings
Fig. 1 is a schematic view showing a sealing structure between a cylinder and a plunger of a double-frame plate hydraulic press.
Fig. 2 is a schematic view showing the forced movement of a protective washer of a sealing structure of a cylinder and a plunger of a double-frame plate hydraulic press.
Fig. 3-5 are views showing the working state of the sealing structure of the oil cylinder and the plunger in the prior art.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-2, the utility model relates to a seal structure of double-frame plate hydraulic press hydro-cylinder and plunger, including the cylinder 1 of hydro-cylinder and with cylinder complex plunger 3, form the sealing washer mounting structure of step form on the outer disc of plunger, form sealing washer installation space 6 between sealing washer mounting structure of step form and the cylinder, install the inner wall one side of the nearly cylinder of lower extreme of sealing washer 2 on the sealing washer mounting structure of step form forms tilt up's inclined plane structure, be provided with the protecting washer 4 that the cross-section is the triangle-shaped form between inclined plane structure and the cylinder to avoid the sealing washer to crowd into in the clearance 5 of cylinder and plunger.
Due to the adoption of the structure, under the action of the radial force F, the protective gasket 4 with the triangular section moves as shown in figure 2, so that the sealing ring is prevented from being squeezed into the gap 5 between the cylinder barrel and the plunger piston, and oil leakage is prevented.
The triangle shape can be a right-angle triangle shape or an isosceles right-angle triangle shape.
The outer side surface of the protection gasket is in sliding contact with the inner wall surface of the cylinder barrel, the lower end surface of the protection gasket is in contact with the step surface of the step-shaped sealing ring mounting structure and completely seals and shields the gap between the cylinder barrel and the plunger at the upper part, and the inclined surface of the protection gasket is in contact with the inclined surface structure.
3-5 seal structure among prior art, the bottom surface of the sealing washer 20 between cylinder and plunger is the plane, the protection packing ring of bottom is the packing ring 40 that the cross-section is the rectangle form, in the top of the clearance 50 between cylinder and plunger, under operating condition, under the effect of the big pressure of liquid, relative hydro-cylinder inflation volume is great (generally 3/1000), and the diameter of packing ring can not follow-up, when the relative cylinder relative motion of plunger, consequently cause the sealing washer to crowd into the cylinder and plunger clearance under the big pressure, the sealing washer damages gradually, causes the oil leak, withdraw and diminish during the release, as shown in fig. 5, can lead to the hydro-cylinder oil leak under this condition, and the utility model discloses behind the protection packing ring of triangle-shaped, then avoided the emergence of such condition completely, avoided the oil leak phenomenon of hydro-cylinder completely.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an install the inner wall one side of the nearly cylinder of lower extreme of the last sealing washer of step form forms the inclined plane structure of tilt up, be provided with the protection packing ring that the cross-section is three horn shapes between inclined plane structure and the cylinder to avoid the sealing washer to extrude into in the clearance of cylinder and plunger, the emergence of the oil leak of hydro-cylinder can be avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a seal structure of double-frame plate hydraulic press hydro-cylinder and plunger, including the cylinder of hydro-cylinder and with cylinder complex plunger, form the sealing washer mounting structure of step form on the outer disc of plunger, form sealing washer installation space between the sealing washer mounting structure of step form and the cylinder, its characterized in that installs the inner wall one side of the nearly cylinder of lower extreme of the last sealing washer of step form forms the inclined plane structure of tilt up, be provided with the protecting washer that the cross-section is the triangle-shaped between inclined plane structure and the cylinder to avoid the sealing washer to crowd into in the clearance of cylinder and plunger.
2. The seal structure for the cylinder and the plunger of the double-frame plate hydraulic press according to claim 1, wherein the outer side surface of the protective washer is in sliding contact with the inner wall surface of the cylinder tube, the lower end surface of the protective washer is in contact with the step surface of the stepped seal ring mounting structure and completely seals and shields the gap between the cylinder tube and the plunger at the upper part, and the inclined surface is in contact with the inclined surface structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921622101.7U CN210830462U (en) | 2019-09-26 | 2019-09-26 | Sealing structure for oil cylinder and plunger of double-frame plate hydraulic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921622101.7U CN210830462U (en) | 2019-09-26 | 2019-09-26 | Sealing structure for oil cylinder and plunger of double-frame plate hydraulic press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210830462U true CN210830462U (en) | 2020-06-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921622101.7U Active CN210830462U (en) | 2019-09-26 | 2019-09-26 | Sealing structure for oil cylinder and plunger of double-frame plate hydraulic press |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210830462U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725951A (en) * | 2019-09-26 | 2020-01-24 | 天津帝广机电设备有限公司 | A double-frame plate hydraulic oil cylinder and plunger sealing structure |
-
2019
- 2019-09-26 CN CN201921622101.7U patent/CN210830462U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110725951A (en) * | 2019-09-26 | 2020-01-24 | 天津帝广机电设备有限公司 | A double-frame plate hydraulic oil cylinder and plunger sealing structure |
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