CN103277362A - Large-diameter single-action piston hydraulic cylinder - Google Patents
Large-diameter single-action piston hydraulic cylinder Download PDFInfo
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- CN103277362A CN103277362A CN 201310185338 CN201310185338A CN103277362A CN 103277362 A CN103277362 A CN 103277362A CN 201310185338 CN201310185338 CN 201310185338 CN 201310185338 A CN201310185338 A CN 201310185338A CN 103277362 A CN103277362 A CN 103277362A
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- hydraulic cylinder
- support ring
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Abstract
The invention relates to a large-diameter single-action piston hydraulic cylinder, in particular to a copper supporting ring used for sealing the large-diameter single-action piston hydraulic cylinder, and belongs to the technical field of metal extrusion. The large-diameter single-action piston hydraulic cylinder comprises a piston. A sealing groove is formed in the piston, a combined sealing element is arranged in the sealing groove, the copper supporting ring is arranged in the sealing groove, the copper supporting ring is located above the combined sealing element, and the outer diameter of the copper supporting ring is larger than the outer diameter of the piston. When the large-diameter single-action piston hydraulic cylinder bears high hydraulic pressure and operates the whole working stroke, due to the supporting action of the copper supporting ring, the extrusion-resistance capacity of the combined sealing element is strengthened, and the probability that the lip edge of the combined sealing element is extruded into the gap between the piston and a cylinder body is greatly reduced, therefore, the seal of the hydraulic cylinder is ensured reliably, the service life and the replacing cycle of the combined sealing element are prolonged.
Description
Technical field
The present invention relates to a kind of large diameter single apply piston oil hydraulic cylinder, particularly relate to the copper support ring of large diameter single apply piston hydraulic cylinder sealing, belong to technical field of metal extrusion.
Background technique
Large diameter single apply piston oil hydraulic cylinder is the core drive parts of metal extrusion equipment, and can oil hydraulic cylinder normally, work reposefully, depends on to a great extent whether the sealing of oil hydraulic cylinder is reliable.The internal leakage of oil hydraulic cylinder, it mainly is the leakage between piston and the cylinder body, therefore the sealing between piston and the cylinder body just seems particularly important, if seal badly, will cause the internal leakage of oil hydraulic cylinder, internal leakage can reduce volumetric efficiency, the temperature rise of aggravation fluid makes piston depart from given location gradually, influences the Location accuracy of oil hydraulic cylinder, make oil hydraulic cylinder can not accurately, stably be parked in a certain position, so the sealing between piston and the cylinder body is one of the key technical indexes of oil hydraulic cylinder performance.
Sealing between piston and the cylinder body, conventional design method is in the seal groove on piston combination seal to be installed, this sealing means is applied to internal diameter φ 1345, stroke 2600mm, working pressure 42MPa, behind the oil hydraulic cylinder of surge pressure 60MPa, find that in use sealability is unreliable, combination seal often is damaged, simultaneously because the wearing and tearing of guidance tape, make the friction of piston and cylinder body increase, thereby pull cylinder body, in order to guarantee the proper functioning of oil hydraulic cylinder, need often to change combination seal, and for the major diameter oil hydraulic cylinder, the combination seal of changing rapid wear is a very difficult job, and how prolonging the Sealing replacement cycle just becomes the task of top priority of improvement sealing configuration.
Summary of the invention
The object of the present invention is to provide a kind of working life that can effectively improve combination seal, reduce the large diameter single apply piston oil hydraulic cylinder that combination seal is changed frequency.
Technical solution:
The present invention includes piston, piston is provided with seal groove, is provided with combination seal in the seal groove, also is provided with support ring in the seal groove, and support ring is positioned at the Sealing top, and the external diameter of support ring is greater than the external diameter of piston.
Described support ring is copper support ring, and material is H62.
Described copper support ring external diameter and cylinder diameter are fit dimension.
The copper support ring material of the present invention is H62, belongs to basis brass, has the good mechanical performance, and hot plasticity is good down, under the cold conditions plasticity also can, excellent cutting performance, H62 at room temperature β to compare α much mutually hard, thereby can be used for bearing the part of big load, and low price in addition, cost is low.
The present invention adds copper support ring in seal groove, copper support ring is positioned at the combination seal top, when moving whole working stroke bearing high hydraulic coupling, because the supporting effect of copper support ring is arranged, the anti-plasticating capacity of combination seal strengthens, the probability that its lip limit is squeezed into slit between piston and cylinder body reduces greatly, thus oil hydraulic cylinder be sealed with reliable guarantee, working life and the replacement cycle of also having improved combination seal simultaneously.
The use of copper support ring has not only been played support and protective action to combination seal, and has reduced the machining accuracy of piston external diameter.In the oil hydraulic cylinder running, as long as guarantee that the matching gap of copper support ring and cylinder diameter is suitable, just can guarantee the coaxality of piston and cylinder body, so piston external diameter and cylinder diameter do not need quality of fit, the piston external diameter size gets final product than the little 1-2mm of cylinder diameter, and this has just reduced the difficulty of processing of piston.
Under extreme case, if namely combination seal damages, the guidance tape wearing and tearing overstep the extreme limit, this moment since the external diameter of copper support ring greater than the external diameter of piston, simultaneously copper support ring external diameter and cylinder diameter are for cooperating assembling, what then at first friction takes place with cylinder body is copper support ring, rather than piston, because support ring is copper material, hardness is lower than cylinder body, so can not pull cylinder body.The use of copper support ring has avoided the piston of steel material to cause the damage of cylinder body with direct contact of cylinder body.
Description of drawings
Fig. 1 is hydraulic cylinder works phase diagram of the present invention;
Fig. 2 is piston assembling partial enlarged drawing of the present invention;
Fig. 3 is piston partial enlarged drawing of the present invention.
Embodiment
The present invention includes piston 1, copper support ring 2, first combination seal 3, second combination seal 4, guidance tape 5, wiper ring 6, piston 1 is provided with seal groove 7, be provided with first combination seal 3 in the seal groove 7, piston 1 is provided with seal groove 8, be provided with second combination seal 4 in the seal groove 8, first combination seal 3, second combination seal, 4 tops are provided with the copper support ring of being made by the H62 material 2, the external diameter of copper support ring 2 is greater than the external diameter of piston 1, and copper support ring 2 external diameters and cylinder diameter are fit dimension.
The assembling mode of the copper support ring 2 of the present invention and piston 1 is for being slidingly matched.
The quality of fit with cylinder inner bore is no longer considered in the processing of piston 1 cylindrical, and the piston external diameter size is less than cylinder diameter size 1-2mm, and this processing that does not have the nominal size that cooperates will be simplified the manufacturing procedure of outside piston.
The processing of seal groove on the piston 1: except the position of original placement first combination seal 3, second combination seal 4, also to add the position of placing copper support ring, the width dimensions that is to say seal groove will strengthen, and value added is the thickness of copper support ring, other size constancy of seal groove.
The size requirement processing that the mounting groove size of guidance tape, wiper ring designs routinely gets final product.
Working procedure: pressure oil enters rodless cavity from hydraulic fluid port; the promotion piston rod moves; in the time of piston rod movement; piston is along with piston rod moves; first combination seal 3 on the piston 1; second combination seal 4 contacts with inboard wall of cylinder block and slides along inboard wall of cylinder block; copper support ring 2 plays the effect of supporting and protecting combination seal; because the supporting effect of copper support ring 2 is arranged; the anti-plasticating capacity of combination seal strengthens; the probability that its lip limit is squeezed into slit between piston and cylinder body reduces greatly; so being sealed with reliable guarantee, working life and the replacement cycle of also having improved combination seal simultaneously of oil hydraulic cylinder.
If combination seal damages, the guidance tape wearing and tearing overstep the extreme limit, this moment since the external diameter of copper support ring 2 greater than the external diameter of piston ring, simultaneously the external diameter of copper support ring and cylinder diameter are for cooperating assembling, what then at first friction takes place with cylinder body is copper support ring 2, rather than piston 1, because support ring is copper material, hardness is lower than cylinder body, so can not pull cylinder body.The use of copper support ring has avoided the piston 1 of steel material to cause the damage of cylinder body with direct contact of cylinder body.
Claims (4)
1. large diameter single apply piston oil hydraulic cylinder comprises piston, and piston is provided with seal groove, is provided with combination seal in the seal groove, it is characterized in that, also is provided with support ring in the seal groove, and support ring is positioned at the Sealing top, and the external diameter of support ring is greater than the external diameter of piston ring.
2. large diameter single apply piston oil hydraulic cylinder according to claim 1 is characterized in that, described support ring is copper support ring, and material is H62.
3. large diameter single apply piston oil hydraulic cylinder according to claim 1 is characterized in that, support ring external diameter and cylinder diameter are fit dimension.
4. large diameter single apply piston oil hydraulic cylinder according to claim 1 is characterized in that, support ring is provided with otch in anchor ring one side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310185338 CN103277362A (en) | 2013-05-20 | 2013-05-20 | Large-diameter single-action piston hydraulic cylinder |
| CN201420097910.1U CN203730745U (en) | 2013-05-20 | 2014-03-05 | Copper support ring for hydraulic cylinder piston sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310185338 CN103277362A (en) | 2013-05-20 | 2013-05-20 | Large-diameter single-action piston hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103277362A true CN103277362A (en) | 2013-09-04 |
Family
ID=49059961
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201310185338 Pending CN103277362A (en) | 2013-05-20 | 2013-05-20 | Large-diameter single-action piston hydraulic cylinder |
| CN201420097910.1U Expired - Lifetime CN203730745U (en) | 2013-05-20 | 2014-03-05 | Copper support ring for hydraulic cylinder piston sealing |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420097910.1U Expired - Lifetime CN203730745U (en) | 2013-05-20 | 2014-03-05 | Copper support ring for hydraulic cylinder piston sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN103277362A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016225551A1 (en) * | 2016-12-20 | 2018-06-21 | Herbert Hänchen GmbH & Co. KG | Sealing ring for a dynamic contact gasket |
-
2013
- 2013-05-20 CN CN 201310185338 patent/CN103277362A/en active Pending
-
2014
- 2014-03-05 CN CN201420097910.1U patent/CN203730745U/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN203730745U (en) | 2014-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130904 |