CN219606030U - Sealing structure of piston rod in semi-solid or liquid medium - Google Patents
Sealing structure of piston rod in semi-solid or liquid medium Download PDFInfo
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- CN219606030U CN219606030U CN202320635875.3U CN202320635875U CN219606030U CN 219606030 U CN219606030 U CN 219606030U CN 202320635875 U CN202320635875 U CN 202320635875U CN 219606030 U CN219606030 U CN 219606030U
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- piston rod
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- shell
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model discloses a sealing structure of a piston rod in a semi-solid or liquid medium, which comprises a shell, a sealing seat, a piston rod and a supporting component, wherein the sealing seat is stepped, the sealing seat is embedded into the shell from outside to inside, a fluid medium is arranged in the shell, and an outer layer sealing ring is arranged between the shell and the sealing seat; the piston rod is connected in the sealing seat through the bearing assembly, the piston rod and the sealing seat are coaxially arranged, and the piston rod reciprocates in the sealing seat; the sealing seat is internally provided with a lubricating oil duct, a filling port of the lubricating oil duct is arranged on the peripheral surface of the sealing seat positioned at the outer side of the shell, the lubricating oil duct extends inwards to the middle section of the sealing seat, and an output port of the lubricating oil duct is aligned with the peripheral surface of the piston rod; the sealing structure can effectively ensure that medium in the cavity is not leaked when the piston rod reciprocates, the piston rod operates stably, and the sealing effect is good.
Description
Technical Field
The utility model belongs to the technical field of piston rod sealing elements, and particularly relates to a sealing structure of a piston rod in a semi-solid or liquid medium.
Background
The hydraulic transmission is used for transmitting force and speed by means of volume change of a sealed oil cavity, and oil leakage can be caused by poor sealing of a hydraulic system, so that the mechanism is unstable in movement, the volumetric efficiency is reduced, the environment is polluted, pressure can not be built up when the system is severe, and the system can not work. The piston rod is a connecting component for supporting the piston to do work, and most of the piston rod is applied to the cylinder and cylinder motion executing component and is a motion component with frequent motion and high technical requirements; the piston rod in the oil cylinder can reciprocate in a semi-solid or liquid medium, so that the piston rod can stably and efficiently run, the cylinder body is required to have the following conditions that firstly, the inner and outer tightness of the cylinder body at the installation position of the piston rod is ensured, secondly, the external lubrication of the piston rod is ensured, and thirdly, the assembly stability between the piston rod and the cylinder body is ensured; in the prior art, there is a difficulty in the structure of the piston rod that satisfies the above conditions at the same time, and thus, improvement of the existing piston rod is required.
Disclosure of Invention
Aiming at the problems and the technical requirements, the utility model provides a sealing structure of a piston rod in a semi-solid or liquid medium, which can effectively ensure that the medium in a cavity is not leaked out when the piston rod reciprocates, and the piston rod runs stably and has good sealing effect.
The technical scheme of the utility model is as follows: the sealing structure of the piston rod in the semi-solid or liquid medium comprises a shell, a sealing seat, the piston rod and a supporting component, wherein the sealing seat is stepped and is embedded into the shell from outside to inside, the fluid medium is arranged in the shell, and an outer sealing ring is arranged between the shell and the sealing seat; the piston rod is connected in the sealing seat through the bearing assembly, the piston rod and the sealing seat are coaxially arranged, and the piston rod reciprocates in the sealing seat; the sealing seat is internally provided with a lubricating oil duct, a filling port of the lubricating oil duct is arranged on the peripheral surface of the sealing seat positioned at the outer side of the shell, the lubricating oil duct extends inwards to the middle section of the sealing seat, and an output port of the lubricating oil duct is aligned with the peripheral surface of the piston rod. In the scheme, the outer sealing ring can seal the space between the shell and the sealing seat, the shell is an oil cavity, and the outer sealing ring prevents fluid medium in the cavity from overflowing; the sealing seat is internally provided with a lubricating oil duct, and lubricating liquid is applied to the circumferential surface of the piston rod from the outside through the lubricating oil duct, so that the reciprocating motion of the piston rod is kept flexible.
Further, an oil storage groove is arranged between the output port of the lubricating oil duct and the circumferential surface of the piston rod, and lubricating oil injected from the filling port can be accumulated in the oil storage groove and uniformly applied to the circumferential surface of the piston rod along with the reciprocating motion of the piston rod. The piston rod reciprocates, and lubricating oil in the oil storage groove is diffused to the peripheral surface of the piston rod, so that the piston rod and the sealing seat are fully lubricated.
Further, an anti-overflow sealing ring is arranged on the outer side of the oil storage groove. The anti-overflow sealing ring is used for sealing the lubricating oil in the sealing seat, so that the lubricating oil can be prevented from overflowing outwards.
Further, the supporting component comprises a self-lubricating copper sleeve and a guide belt, the self-lubricating copper sleeve is fixedly arranged at the inner side end of the sealing seat, the guide belt is arranged at the outer side of the anti-overflow sealing ring, and the self-lubricating copper sleeve and the guide belt form two-point support for the piston rod.
Further, the outside of self-lubricating copper sheathing is equipped with copper sheathing fixed cover, and copper sheathing fixed cover is connected with sealing seat locking, fixes self-lubricating copper sheathing.
Further, the self-lubricating copper sleeve is a graphite copper sleeve.
The graphite copper sleeve has a self-lubricating function, so that the piston rod can move smoothly, the self-lubricating copper sleeve and the guide belt support the piston rod simultaneously, the coaxiality of the piston rod and the sealing seat is ensured, the piston rod is prevented from being eccentric, and the operation stability is good.
Further, an inner dust-proof ring and an outer dust-proof ring are respectively arranged at the two ends of the sealing seat, which are close to the inner end and the outer end. The inner dust ring can prevent micro-particle media in the cavity from entering the sealing seat, and the outer dust ring can prevent external dust from entering the sealing seat along with the reciprocating motion of the piston rod, so that the running environment in the sealing seat is ensured.
Further, two Y-shaped dust rings are arranged between the inner dust ring and the oil storage groove, and one Y-shaped dust ring is arranged between the overflow-proof sealing ring and the guide belt. Because the Y-shaped sealing ring is adopted, the sealing is only carried out on one side, the lubricating oil in the oil storage tank is full of the lubricating oil, and the lubricating oil can not overflow to the outside of the shell, and liquid media possibly entering the sealing seat are extruded back into the medium cavity while overflowing; the Y-shaped dust ring and the overflow-proof sealing ring between the overflow-proof sealing ring and the guide belt form redundant arrangement, so that lubricating oil is further prevented from overflowing the shell.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the graphite copper sleeve and the guide belt are adopted as the supporting components in the sealing structure, so that the double-point support is more stable, the piston rod is stably installed in the sealing seat, and the reciprocating motion of the piston rod can be borne; the sealing seat is internally provided with a lubricating oil duct, lubricating oil can be conveniently applied to the piston rod outside the shell, and the graphite copper sleeve also has a self-lubricating effect, so that the piston rod is uniformly lubricated, and the working flexibility is good; the graphite copper sleeve, the inner dustproof ring and the Y-shaped dustproof ring are sequentially arranged in the sealing seat from inside to outside, and can sequentially seal large-particle media, micro-particle media and liquid media, so that the best sealing effect is achieved through the dustproof combination sequence.
Drawings
FIG. 1 is a cross-sectional view of a piston rod sealing structure of the present utility model;
marked in the figure as: the sealing device comprises a shell 1, an outer sealing ring 11, a sealing seat 2, a filling port 21, a lubricating oil duct 22, an oil storage groove 23, a piston rod 3, an inner dust ring 31, a Y-shaped dust ring 32, an overflow-proof sealing ring 33, an outer dust ring 34, a supporting component 4, a graphite copper sleeve 41, a copper sleeve fixing sleeve 411 and a guide belt 42.
Description of the embodiments
The utility model is further described below with reference to the drawings and examples.
The sealing structure of the piston rod in the semisolid or liquid medium of the utility model shown in fig. 1 comprises a shell 1, a sealing seat 2, a piston rod 3 and a supporting component 4, wherein the sealing seat 2 is in a step shape, the sealing seat 2 is embedded into the shell 1 from outside to inside, the fluid medium is arranged in the shell 1, and an outer layer sealing ring 11 is arranged between the shell 1 and the sealing seat 2. The outer sealing ring 11 can seal the space between the shell 1 and the sealing seat 2, an oil cavity is formed in the shell 1, and the outer sealing ring 11 prevents fluid medium in the cavity from overflowing.
The piston rod 3 is connected in the sealing seat 2 through the supporting component 4, the piston rod 3 and the sealing seat 2 are coaxially arranged, and the piston rod 3 reciprocates in the sealing seat 2; specifically, the supporting component 4 comprises a self-lubricating copper sleeve and a guide belt 42, the self-lubricating copper sleeve is fixedly arranged at the inner side end of the sealing seat 2, the guide belt 42 is arranged at the outer side of the anti-overflow sealing ring 33, and the self-lubricating copper sleeve and the guide belt 42 form two-point support for the piston rod 3; the outer side of the self-lubricating copper bush is provided with a copper bush fixing sleeve 411, and the copper bush fixing sleeve 411 is in locking connection with the sealing seat 2 to fix the self-lubricating copper bush; the self-lubricating copper sheath is preferably a graphite copper sheath 41. The graphite copper sleeve 41 has a self-lubricating function, so that the piston rod 3 can move smoothly, the self-lubricating copper sleeve and the guide belt 42 simultaneously support the piston rod 3, the coaxiality of the piston rod 3 and the sealing seat 2 is ensured, the piston rod 3 is prevented from being eccentric, and the operation stability is good.
The sealing seat 2 is internally provided with a lubricating oil duct 22, a filling port 21 of the lubricating oil duct 22 is arranged on the peripheral surface of the sealing seat 2 positioned at the outer side of the shell 1, the lubricating oil duct 22 extends inwards to the middle section of the sealing seat 2, and an output port of the lubricating oil duct 22 is aligned with the peripheral surface of the piston rod 3; an oil storage groove 23 is provided between the output port of the lubrication oil passage 22 and the circumferential surface of the piston rod 3, and the lubrication oil injected from the filling port 21 can be accumulated in the oil storage groove 23 and uniformly applied to the circumferential surface of the piston rod 3 along with the reciprocation of the piston rod 3.
An anti-overflow sealing ring 33 is arranged on the outer side of the oil storage groove 23, and an inner dustproof ring 31 and an outer dustproof ring 34 are respectively arranged at the inner end and the outer end of the sealing seat 2. The inner dust ring 31 can prevent micro-particle media in the cavity from entering the sealing seat 2, the outer dust ring 34 can prevent external dust from entering the sealing seat 2 along with the reciprocating motion of the piston rod 3, and the running environment in the sealing seat 2 is ensured. Two Y-shaped dust rings 32 are arranged between the inner dust ring 31 and the oil storage groove 23, and one Y-shaped dust ring 32 is arranged between the overflow-proof sealing ring 33 and the guide belt 42. Because the Y-shaped sealing ring 32 is adopted, the sealing is only carried out on one side, the lubricating oil in the oil storage groove 23 is full of the lubricating oil and overflows into the medium cavity, the lubricating oil cannot overflow out of the shell 1, and meanwhile, the liquid medium possibly entering the sealing seat 2 is extruded back into the medium cavity; the Y-shaped dust ring 32 and the spill-proof seal 33 between the spill-proof seal 33 and the guide belt 42 form a redundant arrangement, further preventing the lubrication oil from spilling over the housing 1.
While the utility model has been described with respect to several preferred embodiments, the scope of the utility model is not limited thereto, and any changes and substitutions that would be apparent to one skilled in the art within the scope of the utility model are intended to be included within the scope of the utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.
Claims (8)
1. A sealing structure of a piston rod in a semi-solid or liquid medium is characterized in that: the sealing seat is in a step shape, the sealing seat is embedded into the shell from outside to inside, a fluid medium is arranged in the shell, and an outer layer sealing ring is arranged between the shell and the sealing seat; the piston rod is connected in the sealing seat through the bearing assembly, the piston rod and the sealing seat are coaxially arranged, and the piston rod reciprocates in the sealing seat; the sealing seat is internally provided with a lubricating oil duct, a filling port of the lubricating oil duct is arranged on the peripheral surface of the sealing seat positioned at the outer side of the shell, the lubricating oil duct extends inwards to the middle section of the sealing seat, and an output port of the lubricating oil duct is aligned with the peripheral surface of the piston rod.
2. A sealing structure for a piston rod in a semi-solid or liquid medium according to claim 1, wherein: an oil storage groove is arranged between an output port of the lubricating oil duct and the circumferential surface of the piston rod, and lubricating oil injected from the filling port can be accumulated in the oil storage groove and uniformly applied to the circumferential surface of the piston rod along with the reciprocating motion of the piston rod.
3. A sealing structure for a piston rod in a semi-solid or liquid medium according to claim 2, wherein: and an anti-overflow sealing ring is arranged on the outer side of the oil storage groove.
4. A sealing structure for a piston rod in a semi-solid or liquid medium according to claim 3, wherein: the supporting component comprises a self-lubricating copper sleeve and a guide belt, the self-lubricating copper sleeve is fixedly arranged at the inner side end of the sealing seat, the guide belt is arranged at the outer side of the anti-overflow sealing ring, and the self-lubricating copper sleeve and the guide belt form two-point support for the piston rod.
5. The sealing structure of a piston rod in a semi-solid or liquid medium according to claim 4, wherein: the outside of self-lubricating copper sheathing is equipped with copper sheathing fixed cover, and copper sheathing fixed cover is connected with sealing seat locking, fixes self-lubricating copper sheathing.
6. The sealing structure of a piston rod in a semi-solid or liquid medium according to claim 5, wherein: the self-lubricating copper sleeve is a graphite copper sleeve.
7. The sealing structure of a piston rod in a semi-solid or liquid medium according to claim 6, wherein: an inner dust-proof ring and an outer dust-proof ring are respectively arranged at the two ends of the sealing seat, which are close to the inner end and the outer end.
8. A sealing structure for a piston rod in a semi-solid or liquid medium according to claim 7, wherein: two Y-shaped dust rings are arranged between the inner dust ring and the oil storage groove, and one Y-shaped dust ring is arranged between the overflow-proof sealing ring and the guide belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635875.3U CN219606030U (en) | 2023-03-27 | 2023-03-27 | Sealing structure of piston rod in semi-solid or liquid medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635875.3U CN219606030U (en) | 2023-03-27 | 2023-03-27 | Sealing structure of piston rod in semi-solid or liquid medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219606030U true CN219606030U (en) | 2023-08-29 |
Family
ID=87741349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320635875.3U Active CN219606030U (en) | 2023-03-27 | 2023-03-27 | Sealing structure of piston rod in semi-solid or liquid medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219606030U (en) |
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2023
- 2023-03-27 CN CN202320635875.3U patent/CN219606030U/en active Active
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