CN215980236U - High performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale - Google Patents
High performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale Download PDFInfo
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- CN215980236U CN215980236U CN202122513156.8U CN202122513156U CN215980236U CN 215980236 U CN215980236 U CN 215980236U CN 202122513156 U CN202122513156 U CN 202122513156U CN 215980236 U CN215980236 U CN 215980236U
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Abstract
The utility model discloses a high-performance after-sale piston rod sealing element for a maintenance oil cylinder of an excavator, and belongs to the field of after-sale piston rod sealing elements for maintenance oil cylinders of excavators. According to the utility model, the designed top auxiliary lip sealing structure can prolong the service life of executing elements such as a hydraulic oil cylinder in the after-sales market, reduce the rejection rate of the hydraulic oil cylinder in the after-sales market and reduce the processing difficulty of the hydraulic oil cylinder after being rusted; the polyurethane sealing element can be formed by injection molding, so that the surface of the product can be ensured to be smooth and has no burrs, flash and the like, and the roughness of the surface of the product can be ensured; the sealing lip is also provided with a trimming process, so that the phenomena of gaps and cracking are avoided, the sealing lip of a product can be ensured to be in a sharp-angled shape, and the qualified sealing performance can be ensured by contacting with the outer diameter of the piston rod and the groove; compared with a rubber sealing element, the polyurethane sealing element has the advantages of high hardness, good strength, high elasticity, high wear resistance, tear resistance, aging resistance, ozone resistance, radiation resistance, good conductivity and the like.
Description
Technical Field
The utility model belongs to the technical field of after-sale piston rod sealing elements of excavator maintenance oil cylinders, and particularly relates to a high-performance after-sale piston rod sealing element of an excavator maintenance oil cylinder.
Background
The hydraulic cylinder is an indispensable executing element of a hydraulic system, is widely applied to various industries such as engineering machinery, heavy machinery and the like, and has higher and higher requirements on the hydraulic cylinder and further has higher and higher requirements on a matched sealing piece of the hydraulic cylinder along with the development of high pressure and high power of hydraulic equipment;
at present, in the long-term high-speed high-pressure use of a hydraulic cylinder, a sealing element groove in an after-sale oil cylinder is rusted, a maintenance worker generally difficultly treats the rusted groove cleanly, the surface precision of the groove in the oil cylinder is not high, the groove is difficult to process secondarily, the rejection rate is high, and the service life of the oil cylinder is short. And the sealing element of the common piston rod in long-time high-pressure and high-speed work can also generate plastic deformation, the lip of the sealing ring is tightly held with the piston rod, and friction and heat generation are generated due to frequent reciprocating motion and friction, so that the lip is aged and deformed, the interference is reduced, the elasticity of the product is reduced, and the service life of the sealing element is shortened.
SUMMERY OF THE UTILITY MODEL
Therefore, the sealing element for the piston rod after sale of the high-performance excavator maintenance oil cylinder is needed to solve the problems that the surface accuracy of the groove in the oil cylinder is not high, the groove is difficult to process secondarily, the rejection rate is high, the service life of the oil cylinder is short, and the service life of the sealing element is reduced.
The technical scheme adopted by the utility model is as follows: the utility model provides a high performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale, includes rubber O type circle elastomer, hydro-cylinder and polyurethane sealing member, the up end of polyurethane sealing member is equipped with the breach, and rubber O type circle elastomer is established inside the breach of polyurethane sealing member simultaneously.
In a preferred embodiment, the polyurethane seal comprises a static seal lip, a dynamic seal lip and an auxiliary lip on top of the static seal lip.
In a preferred embodiment, after the polyurethane seal is installed, a movable sealing lip on the polyurethane seal generates a certain interference with a piston rod of the oil cylinder.
In a preferred embodiment, after the polyurethane sealing element is installed, a static sealing lip on the polyurethane sealing element is installed to generate a certain interference with the outer diameter of the groove of the oil cylinder.
In a preferred embodiment, after the polyurethane seal is installed, the static seal top auxiliary lip of the polyurethane seal is installed to generate a certain interference with the rustless surfaces on the two sides of the groove of the oil cylinder.
In a preferred embodiment, the rubber O-ring elastomer is a high elastic polymer material and is arranged between the static sealing lip and the dynamic sealing lip of the polyurethane seal.
In a preferred embodiment, the rubber O-ring elastomer is made of nitrile rubber which is a general synthetic rubber material, and has a circular cross section.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:
1. according to the utility model, the designed polyurethane sealing element structure is a novel structure, the top auxiliary lip of the sealing element is designed for the after-sale oil cylinder of the excavator, and the special top auxiliary lip sealing structure can prolong the service life of the executing elements such as the hydraulic oil cylinder in the after-sale market, reduce the rejection rate of the hydraulic oil cylinder in the after-sale market and reduce the processing difficulty after the hydraulic oil cylinder is corroded; the polyurethane sealing element can be formed by injection molding, so that the surface of the product can be ensured to be smooth and has no burrs, flash and the like, and the roughness of the surface of the product can be ensured; the sealing lip is also provided with a trimming process, so that the phenomena of gaps and cracking are avoided, the sealing lip of a product can be ensured to be in a sharp-angled shape, and the qualified sealing performance can be ensured by contacting with the outer diameter of the piston rod and the groove; compared with a rubber sealing element, the polyurethane sealing element has the advantages of high hardness, good strength, high elasticity, high wear resistance, tearing resistance, aging resistance, ozone resistance, radiation resistance, good conductivity and the like;
2. according to the combined sealing element, the rubber O-shaped ring fittings in the combined sealing element are common structures on the market, the materials and the performance can be reasonably guaranteed, the rubber O-shaped ring fittings can be detected by the national GB 1235-76 standard, the rubber O-shaped ring fittings are mature products, the problem of difficult product purchase can be reduced, and the purchase cost can be reduced. The O-shaped ring (with high elasticity) is embedded in the polyurethane, so that the compression permanent deformation resistance of the polyurethane sealing element can be improved, the sealing performance and the service life of the polyurethane sealing element are improved, and the sealing ring is guaranteed to have excellent sealing performance in a low-pressure state.
Drawings
FIG. 1 is a schematic view of the overall cross-sectional structure of the present invention;
FIG. 2 is a cross-sectional view of a polyurethane annular seal of the present invention;
FIG. 3 is a schematic view of the connection between the cylinder groove and the piston rod according to the present invention.
The labels in the figure are: 1. a rubber O-ring elastomer; 2. a polyurethane seal; 3. a trench; 4. a piston rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The after-market piston rod sealing member of a high performance excavator maintenance cylinder according to the present invention will be further described with reference to fig. 1 to 3.
The utility model provides a high performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale, includes rubber O type circle elastomer 1, hydro-cylinder and polyurethane seal 2, and the up end of polyurethane seal 2 is equipped with the breach, and rubber O type circle elastomer 1 is established inside the breach of polyurethane seal 2 simultaneously, has slot 3 between polyurethane seal 2 and the hydro-cylinder this moment, as shown in figure two.
The polyurethane sealing element 2 comprises a static sealing lip, a dynamic sealing lip and an auxiliary lip on the top of the static sealing lip; after the polyurethane sealing element 2 is installed, a movable sealing lip on the polyurethane sealing element 2 and a piston rod 4 of the oil cylinder generate a certain interference magnitude; after the polyurethane sealing element 2 is installed, a static sealing lip on the polyurethane sealing element 2 generates a certain interference with the outer diameter of the oil cylinder groove 3 after being installed, and at the moment, the static sealing lip is higher than the rusted part of the oil cylinder groove 3 and is staggered with the rusted part, so that the serious friction between the polyurethane sealing element 2 and the rough surface of the oil cylinder groove 3 is avoided, the static sealing lip of the polyurethane sealing element 2 is abraded, and the service life of the polyurethane sealing element 2 is damaged; after the polyurethane sealing element 2 is installed, a certain interference magnitude is generated between the static sealing top auxiliary lip of the polyurethane sealing element 2 and the rustless surfaces on the two sides of the groove 3 of the oil cylinder after the installation; the rubber O-shaped ring elastomer 1 is made of a high-elasticity polymer material and is arranged between a static sealing lip and a dynamic sealing lip of the polyurethane sealing element 2, so that the anti-compression deformation capacity can be added to the polyurethane sealing element 2, and the radial sealing interference force of the polyurethane sealing element 2 in a groove 3 of the oil cylinder is prolonged; the rubber O-shaped ring elastomer 1 is made of a general synthetic rubber material nitrile butadiene rubber NBR, and has a circular cross section;
through the technical scheme: because the polyurethane sealing element 2 is made of polyurethane material and the rubber O-shaped ring elastic body 1 is made of synthetic rubber NBR, in the embodiment, the polyurethane sealing element 2 is made of polyurethane, and the annular seal can be formed by injection molding or turning under the condition of not influencing and changing the strength of the annular seal; then the rubber O-shaped ring is installed with the rubber O-shaped ring elastic body 1 into a whole, so that the sealing performance is better, the elasticity is better, the compression permanent deformation resistance is stronger, the wear resistance is better, and the weight of the sealing element is light. The polyurethane material is oil-resistant, strong in water resistance and not easy to oxidize and decay, the superior lip structure design effectively provides a sealing effect, the friction force of the polyurethane sealing element 2 is small, and the service life of the oil cylinder is long.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a high performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale, includes rubber O type circle elastomer (1), hydro-cylinder and polyurethane seal (2), its characterized in that: a notch is formed in the upper end face of the polyurethane sealing element (2), and meanwhile the rubber O-shaped ring elastic body (1) is arranged inside the notch of the polyurethane sealing element (2).
2. The high performance excavator service cylinder after-market piston rod seal of claim 1, further comprising: the polyurethane sealing element (2) comprises a static sealing lip, a dynamic sealing lip and an auxiliary lip on the top of the static sealing lip.
3. The high performance excavator service cylinder after-market piston rod seal of claim 2, wherein: after the polyurethane sealing element (2) is installed, a movable sealing lip on the polyurethane sealing element (2) and a piston rod (4) of the oil cylinder generate certain interference.
4. The high performance excavator service cylinder after-market piston rod seal of claim 2, wherein: after the polyurethane sealing element (2) is installed, a static sealing lip on the polyurethane sealing element (2) is installed and then generates a certain interference with the outer diameter of the groove (3) of the oil cylinder.
5. The high performance excavator service cylinder after-market piston rod seal of claim 2, wherein: after the polyurethane sealing element (2) is installed, a certain interference magnitude is generated between the static sealing top auxiliary lip of the polyurethane sealing element (2) and the rustless surfaces on the two sides of the groove (3) of the oil cylinder after the auxiliary lip is installed.
6. The high performance excavator service cylinder after-market piston rod seal of claim 1, further comprising: the rubber O-shaped ring elastomer (1) is made of high-elasticity polymer materials and is arranged between a static sealing lip and a dynamic sealing lip of the polyurethane sealing element (2).
7. The high performance excavator service cylinder after-market piston rod seal of claim 1, further comprising: the rubber O-shaped ring elastic body (1) is made of a general synthetic rubber material, namely nitrile rubber, and the cross section of the rubber O-shaped ring elastic body is of a circular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122513156.8U CN215980236U (en) | 2021-10-19 | 2021-10-19 | High performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122513156.8U CN215980236U (en) | 2021-10-19 | 2021-10-19 | High performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215980236U true CN215980236U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122513156.8U Active CN215980236U (en) | 2021-10-19 | 2021-10-19 | High performance digs quick-witted maintenance hydro-cylinder piston rod sealing member after sale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215980236U (en) |
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2021
- 2021-10-19 CN CN202122513156.8U patent/CN215980236U/en active Active
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