CN202125485U - Hydraulic cylinder end cap device - Google Patents
Hydraulic cylinder end cap device Download PDFInfo
- Publication number
- CN202125485U CN202125485U CN2011201755710U CN201120175571U CN202125485U CN 202125485 U CN202125485 U CN 202125485U CN 2011201755710 U CN2011201755710 U CN 2011201755710U CN 201120175571 U CN201120175571 U CN 201120175571U CN 202125485 U CN202125485 U CN 202125485U
- Authority
- CN
- China
- Prior art keywords
- end cap
- cylinder body
- seal ring
- annular chamfer
- piston
- 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 provides a hydraulic cylinder end cap device, which comprises a cylinder body 1, a piston 2 matched with the cylinder body 1, a seal ring 3 installed between the cylinder body 1 and the piston 2 and an end cap 5. A leakage-proof seal ring 4 is installed on the contact end face of the cylinder body 1 and the end cap 5, the cylinder body 1 is connected to the end cap 5 through a screw 6, an annular chamfer cavity 9 is arranged on the end face and the inner surface of the cylinder body 1, and the inner surface of the cylinder body 1 is used for placing the seal ring 3. An unloading hole 8 is disposed at the contact position between the end cap 5 and the annular chamfer cavity 9 and communicated with an oil return hole 7. When the hydraulic cylinder end cap device works, if the seal ring 3 fails, high pressure liquid overflows from the outer side of the seal ring 3 and flows into the annular chamfer cavity 9 formed by the end cap 5 and the cylinder body 1. Due to the fact that the annular chamfer cavity 9 is communicated with the unloading hole 8 and the oil return hole 7, the pressure is zero pressure, namely, unloading occurs when the high pressure liquid enters the annular chamfer cavity 9. The corresponding end cap 5 and the screw 6 can be designed to be much smaller so that safety coefficient is higher.
Description
Technical field
The utility model relates to a kind of end cap device, is meant a kind of cylinder ends lid arrangement especially.
Background technique
Present existing cylinder ends lid arrangement comprises cylinder body 1, with cylinder body 1 close-fitting piston 2; Be installed in the seal ring 3 between cylinder body 1 and the piston 2; Also comprise end cap 5, cylinder body 1 contacts end face with said end cap 5 leakproof seal circle 4 is installed, and cylinder body 1 connects through screw 6 with end cap 5.In the work of cylinder ends lid arrangement, when seal ring 3 lost efficacy, the liquid of high pressure will overflow along the inner side surface or the outer side surface of seal ring 3, and the highly pressurised liquid that overflows from seal ring 3 inner side surfaces (along piston face) can not influence the load of cylinder ends lid arrangement; Know from experience the zone that gets between leakproof seal circle 4 and the seal ring 3 and overflow high pressure liquid, make this zone become the high pressure liquid tagma, at this moment act on the operating load Q of end cap 5 along seal ring 3 outer side surfaces
2Be standard load Q
11.548 times, therefore when design, need be according to Q
2 Design end cap 5 passes through screw 6, and has reduced the safety coefficient of hydraulic pressure end cap device.
The model utility content
The utility model provides a kind of cylinder ends lid arrangement, with the low technical problem of safety coefficient that solves the cylinder ends lid arrangement.
For solving the problems of the technologies described above, the utility model provides a kind of cylinder ends lid arrangement, comprises piston 1; With the cylinder body 2 that said piston 1 cooperates, be installed in the seal ring 3 between said piston 1 and the said cylinder body 2, also comprise end cap 5; Said cylinder body 2 contacts end face with said end cap 5 leakproof seal circle 4 is installed; Said cylinder body 2 is connected through screw 6 with said end cap 5, and unloading hole 8 and spill port 7 are arranged on the said end cap 5, said unloading hole 8 and said spill port 7 conductings; The end face of said cylinder body 2 has annular chamfer chamber 9 with the internal surface intersection of placing said seal ring 3, said annular chamfer chamber 9 and said unloading hole 8 conductings.
When the cylinder ends lid arrangement that the utility model provides is worked; If seal ring 3 lost efficacy, highly pressurised liquid overflows from seal ring 3 outsides, through the slit of cylinder body 1 endoporus and end cap 5 boss; Flow in the annular chamfer chamber 9 of end cap 5 and cylinder body 1 formation; Because annular chamfer chamber 9 and unloading hole 8 and spill port 7 conductings, its pressure is zero pressure, and the annular chamfer of highly pressurised liquid entering just chamber 9 is off-load.The load that acts on end cap 5 like this has only Q all the time
1, what corresponding end cap 5 and screw 6 can design is little a lot, and its safety coefficient is higher.
Description of drawings
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is the cylinder ends lid arrangement structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
The prior art constructions schematic representation is referring to Fig. 1; Comprise cylinder body 1, the piston 2 that cooperates with cylinder body 1 is installed in the seal ring 3 between cylinder body 1 and the piston 2; Also comprise end cap 5; Cylinder body 1 contacts end face with said end cap 5 leakproof seal circle 4 is installed, unloading hole 8 and spill port 7 conductings on the end cap 5, and cylinder body 1 connects through screw 6 with end cap 5.
This device proper functioning load Q
1Following calculating:
(D
1 2-D
0 2)πV/4＝Q
1
With 200 tons hydraulic presses is example:
D
0＝356mm?D
1＝386mm?D
2＝403mm
V＝2000N/cm
2
Q
1=(38.6
2-35.6
2) * 3.14 * 2000 ÷ 4=349482N (=34.94 tons)
V: oil hydraulic cylinder Maximum operating pressure N/cm
2
Q
1: act on the standard load on the end cap 5
In the work of cylinder ends lid arrangement, when seal ring 3 lost efficacy, the liquid of high pressure will overflow along the inner side surface or the outer side surface of seal ring 3, and the highly pressurised liquid that overflows from seal ring 3 inner side surfaces (along piston face) can not influence the load of cylinder ends lid arrangement; Know from experience the zone that gets between leakproof seal circle 4 and the seal ring 3 and overflow high pressure liquid, make this zone become the high pressure liquid tagma, at this moment act on the operating load Q of end cap 5 along seal ring 3 outer side surfaces
2
It calculates as follows:
(D
2 2-D
0 2)πV/4＝Q
2
With 200 tons hydraulic presses is example:
Q
2=(40.3
2-35.6
2) * 3.14 * 2000 ÷ 4=541084N (=54.11 tons)
Q
2÷Q
1＝1.548
Can see the operating load Q that acts on end cap 5 from aforementioned calculation
2Be normal load Q
11.548 times, therefore when design, need be according to Q
2 Design end cap 5 passes through screw 6, and has reduced the safety coefficient of hydraulic pressure end cap device.
The cylinder ends lid arrangement structural representation figure of the utility model comprises cylinder body 1, the piston 2 that cooperates with cylinder body 1 referring to Fig. 2; Be installed in the seal ring 3 between cylinder body 1 and the said piston 2; Also comprise end cap 5, cylinder body 1 contacts end face with said end cap 5 leakproof seal circle 4 is installed, and cylinder body 1 is connected through screw 6 with end cap 5; The end face of cylinder body 1 has annular chamfer chamber 9 with the internal surface of placing said seal ring 3; End cap 5 has unloading hole 8 with annular chamfer chamber 9 touching positions, and unloading hole 8 is led 7 with spill port and led to, and annular chamfer chamber 9 chamferings are fillet.
When the cylinder ends lid arrangement is worked; If seal ring 3 lost efficacy, highly pressurised liquid overflows from seal ring 3 outsides, through the slit of cylinder body 1 endoporus and end cap 5 boss; Flow in the annular chamfer chamber 9 of end cap 5 and cylinder body 1 formation; Because annular chamfer chamber 9 and unloading hole 8 and spill port 7 conductings, its pressure is zero pressure, and the annular chamfer of highly pressurised liquid entering just chamber 7 is off-load.The load that acts on end cap 5 like this has only Q all the time
1, what corresponding end cap 5 and screw 6 can design is little a lot, and its safety coefficient is higher.
Below to be the comparisons of 200 t hydraulic press oil hydraulic cylinder end cap instances:
The cylinder ends lid arrangement of existing technology, 63 kilograms of the substances of its end cap 5, screw 6 are the socket head screw of 12 M22.
This practical new cylinder ends lid arrangement, 29 kilograms of the substances of its end cap 5, screw 6 are the socket head screw of 16 M16.
The safety coefficient of the socket head screw of 16 M16 and operating load Q1 is 1.067 times of safety coefficient of socket head screw and the operating load Q2 of 12 M22.
For the cylinder ends lid arrangement that the utility model embodiment is set forth, all within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (1)
1. a cylinder ends lid arrangement comprises piston (1), the cylinder body (2) that cooperates with said piston (1); Be installed in the seal ring (3) between said piston (1) and the said cylinder body (2); Also comprise end cap (5), said cylinder body (2) contacts end face with said end cap (5) leakproof seal circle (4) is installed, and said cylinder body (2) is connected through screw (6) with said end cap (5); It is characterized in that: unloading hole (8) and spill port (7) are arranged on the said end cap (5); Said unloading hole (8) and said spill port (7) conducting, the end face of said cylinder body (2) has annular chamfer chamber (9) with the internal surface intersection of placing said seal ring (3), said annular chamfer chamber (9) and said unloading hole (8) conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201755710U CN202125485U (en) | 2011-05-27 | 2011-05-27 | Hydraulic cylinder end cap device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201755710U CN202125485U (en) | 2011-05-27 | 2011-05-27 | Hydraulic cylinder end cap device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202125485U true CN202125485U (en) | 2012-01-25 |
Family
ID=45488553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201755710U Expired - Fee Related CN202125485U (en) | 2011-05-27 | 2011-05-27 | Hydraulic cylinder end cap device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202125485U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837917A (en) * | 2016-12-30 | 2017-06-13 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN110360181A (en) * | 2019-07-28 | 2019-10-22 | 天津市双象工程液压件有限责任公司 | A kind of cylinder cap and the hydraulic cylinder for being equipped with this cylinder cap |
-
2011
- 2011-05-27 CN CN2011201755710U patent/CN202125485U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837917A (en) * | 2016-12-30 | 2017-06-13 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN106837917B (en) * | 2016-12-30 | 2018-04-24 | 河海大学常州校区 | A kind of single-action hydraulic cylinder shown with internal leakage |
| CN110360181A (en) * | 2019-07-28 | 2019-10-22 | 天津市双象工程液压件有限责任公司 | A kind of cylinder cap and the hydraulic cylinder for being equipped with this cylinder cap |
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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: 20120125 Termination date: 20190527 |