CN209724835U - A kind of heavy type cylinder dynamical seal structure - Google Patents
A kind of heavy type cylinder dynamical seal structure Download PDFInfo
- Publication number
- CN209724835U CN209724835U CN201920221413.0U CN201920221413U CN209724835U CN 209724835 U CN209724835 U CN 209724835U CN 201920221413 U CN201920221413 U CN 201920221413U CN 209724835 U CN209724835 U CN 209724835U
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- Prior art keywords
- piston
- sealing ring
- oil cylinder
- seal structure
- piston rod
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- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000003068 static effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 9
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 8
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model discloses a kind of heavy cylinder dynamical seal structure, including oil cylinder and piston rod, is socketed with piston at the top of the piston rod, and the lateral wall of the piston is socketed with sealing ring, and the junction of the piston rod and piston forms hydraulic cavity.The heavy type cylinder dynamical seal structure, it is designed using special structure, in oil cylinder flexible deformation, when inner wall is subjected to displacement, the pressure oil of oil cylinder is introduced into piston inner wall, piston external diameter is made to generate elastic displacement, to reduce seal clearance, reach preferable sealing effect, compared with the pressure-compensated piston movable sealing structure of other way, is not required in addition increase another part and sealing effect is especially desirable.
Description
Technical field
The utility model relates to hydraulic press technical field, specially a kind of heavy cylinder dynamical seal structure.
Background technique
The reason of sealing ring initial failure, there are many reasons, but its initial failure main cause is sealing ring due to its sealing
Function and its intensity of reasons is not again high, under pressure its back squeezed into the gap of sealing repeatedly make material by
It gradually falls off, causes initial failure.
The solution of sealing problem is said from the manufacture angle of sealing element, should improve its cold endudrance energy, should be use up from using angle to say
Seal clearance may be reduced.Hydraulic cylinder diameter is bigger, its higher sealing of pressure is more difficult, and the service life of sealing element gets over
It is short.The most common method of prior art situation is the method for circle of shifting up behind sealing ring, and this method has the simple advantage of structure,
It is preferable solution in certain size and pressure limit.But under bigger size and higher pressure, side above
Method is with regard to helpless.Such as 1000mm internal diameter oil cylinder 50MPa pressure when, service life only has thousands of or even hundreds of time.
Now using the more method for thering is sealing ring back to be added gasket.Change gasket seal side adding using gasket seal
When method, fill in gap is not sealing ring but gasket.The lower height of pad pressure effect, which is returned its thinning radial dimension and returned, to become larger, by
In the simple shape and working characteristics of gasket, allow to be manufactured with material higher than sealing ring compression strength, the anti-longevity filled in
Life can extend, and the program has the advantages that the advantages of structure is simple when seal clearance is less big but in wide arc gap situation lower gasket
It will soon fail.
Oil cylinder generates flexible deformation under pressure oil effect, and inner wall generates displacement, forms gap, In between piston and the inside wall of cylinder
Sealing ring back can be stuffed into down repeatedly in this gap when only sealing ring does dynamic sealing, due to sealing ring sealing characteristics and
The compression strength of its material of reasons is relatively low, and gap of filling in repeatedly destroys sealing ring, in large scale and
It is in particular serious when high pressure.
Utility model content
The purpose of this utility model is to provide a kind of heavy cylinder dynamical seal structures, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the utility model provides the following technical solutions: a kind of heavy type cylinder dynamical seal structure, including
Oil cylinder and piston rod are socketed with piston at the top of the piston rod, and the lateral wall of the piston is socketed with sealing ring, the piston
The junction of bar and piston forms hydraulic cavity.
Preferably, the inner sidewall bottom of the piston is equipped with the static sealing ring for being socketed on piston rod lateral wall.
Preferably, the lateral wall of the piston is equipped with external annular groove compatible with sealing ring.
Preferably, the inner sidewall bottom of the piston is equipped with inner ring connected in star compatible with static sealing ring.
Compared with prior art, the utility model has the beneficial effects that the heavy type cylinder dynamical seal structure, using special
Structure design, in oil cylinder flexible deformation, when inner wall is subjected to displacement, introduces piston inner wall for the pressure oil of oil cylinder, makes outside piston
Diameter generates elastic displacement and reaches preferable sealing effect to reduce seal clearance, the pressure-compensated piston with other way
Movable sealing structure is compared, and is not required in addition increase another part and sealing effect is especially desirable.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the piston structure schematic diagram of the utility model.
In figure: 1, oil cylinder, 2, sealing ring, 3, piston, 4, static sealing ring, 5, piston rod, 6, hydraulic cavity.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of technical solution referring to FIG. 1-2: a kind of heavy type cylinder dynamical seal structure, including oil
Cylinder 1 and piston rod 5, the top of piston rod 5 are socketed with piston 3；
The lateral wall of piston 3 is socketed with sealing ring 2, and it is recessed that the lateral wall of piston 3 is equipped with outer ring compatible with sealing ring 2
Slot, the inner sidewall bottom of piston 3 are equipped with the static sealing ring 4 for being socketed on 5 lateral wall of piston rod, and the inner sidewall bottom of piston 3 is equipped with
Inner ring connected in star compatible with static sealing ring 4；
The junction of piston rod 5 and piston 3 forms hydraulic cavity 6；
From above, to net sealing ring position, both almost entire oil cylinder inner wall had had oil pressure work to piston inner wall in actual use
With oil pressure is filled in hydraulic cavity 6, and piston external diameter then only has sealing ring to have oil pressure effect so that upper part is a bit of, so living
Plug outer diameter under the action of oil pressure can become larger；
The upper surface of piston has oil pressure to act on and is that piston rod because its height is larger can be considered as rigid branch below piston
Support is so the deformation of piston external diameter is substantially uniform above and below, due to the deformation of the inside wall of cylinder in elastic limit and piston external diameter
It is directly proportional to oil cylinder working-pressure, so the gap of sealing is little with pressure change；
What is mainly determined by oil cylinder internal pressure and structure size due to the deflection of piston external diameter is unrelated with present position living,
And the deflection of the inside wall of cylinder removes and its structure size and oil cylinder internal pressure have i.e. oil cylinder inner wall also related with oil cylinder axial position outside the Pass
Deflection is variation with its axial position, but general oil cylinder pressing position has a distance apart from oil cylinder bottom, exists in other words
Its pressurized segment oil cylinder bore deflection it is little with the variable quantity on axial position.
Working principle: at work, piston rod drives piston effect when in oil cylinder to hydraulic press, in oil cylinder flexible deformation,
When inner wall is subjected to displacement, the pressure oil of oil cylinder is introduced into the hydraulic cavity 6 of piston inner wall, piston external diameter is made to generate elastic position
It moves, to reduce seal clearance, reaches preferable sealing effect.
In the description of the present invention, it should be understood that term " coaxial ", " bottom ", " one end ", " top ", " in
The orientation of the instructions such as portion ", " other end ", "upper", " side ", " top ", "inner", " front ", " center ", " both ends " or position are closed
System is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is construed as a limitation of the present invention.
In addition, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as instruction or
It implies relative importance or implicitly indicates the quantity of indicated technical characteristic, define " first ", " second ", " the as a result,
Three ", the feature of " the 4th " can explicitly or implicitly include at least one of the features.
In the present invention unless specifically defined or limited otherwise, term " installation ", " setting ", " connection ", " Gu
Calmly ", the terms such as " being screwed on " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；
It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly, for this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of heavy type cylinder dynamical seal structure, it is characterised in that: including oil cylinder (1) and piston rod (5), the piston rod (5)
Top be socketed with piston (3), the lateral wall of the piston (3) is socketed with sealing ring (2), the piston rod (5) and piston (3)
Junction form hydraulic cavity (6).
2. a kind of heavy cylinder dynamical seal structure according to claim 1, it is characterised in that: the inside of the piston (3)
Wall bottom is equipped with the static sealing ring (4) for being socketed on piston rod (5) lateral wall.
3. a kind of heavy cylinder dynamical seal structure according to claim 1, it is characterised in that: the outside of the piston (3)
Wall is equipped with sealing ring (2) compatible external annular groove.
4. a kind of heavy cylinder dynamical seal structure according to claim 1 or 2, it is characterised in that: the piston (3) it is interior
Sidewall bottom is equipped with static sealing ring (4) compatible inner ring connected in star.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920221413.0U CN209724835U (en) | 2019-02-21 | 2019-02-21 | A kind of heavy type cylinder dynamical seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920221413.0U CN209724835U (en) | 2019-02-21 | 2019-02-21 | A kind of heavy type cylinder dynamical seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209724835U true CN209724835U (en) | 2019-12-03 |
Family
ID=68683627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920221413.0U Expired - Fee Related CN209724835U (en) | 2019-02-21 | 2019-02-21 | A kind of heavy type cylinder dynamical seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209724835U (en) |
-
2019
- 2019-02-21 CN CN201920221413.0U patent/CN209724835U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 110000 No. 3, Lane 56, Xinggong North Street, Tiexi District, Shenyang City, Liaoning Province Patentee after: Shenyang Sida Hydraulic Co.,Ltd. Address before: 110000 No. 3, Lane 56, Xinggong North Street, Tiexi District, Shenyang City, Liaoning Province Patentee before: SHENYANG SIDA HYDRAULIC PRESS FACTORY |
|
| 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: 20191203 |