CN219827328U - Extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for hydraulic support - Google Patents
Extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for hydraulic support Download PDFInfo
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- CN219827328U CN219827328U CN202320855895.1U CN202320855895U CN219827328U CN 219827328 U CN219827328 U CN 219827328U CN 202320855895 U CN202320855895 U CN 202320855895U CN 219827328 U CN219827328 U CN 219827328U
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- resistant
- piston rod
- sealing element
- extrusion
- groove
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- 238000007789 sealing Methods 0.000 title claims abstract description 61
- 238000001125 extrusion Methods 0.000 title claims abstract description 15
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 230000007306 turnover Effects 0.000 description 3
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- -1 polyoxymethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to an extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for a hydraulic support, which relates to the field of oil seal production, and comprises a sealing piece body, wherein the sealing piece body is positioned in a groove of a matching part; the auxiliary lip is fixedly connected with one side, away from the cylinder bottom of the hydraulic cylinder, of the sealing element body and is in contact with the end face of the matching part, and one side, close to the piston rod, of the auxiliary lip is in contact with the side face of the piston rod; the auxiliary lip is closely knit with the side wall of the matching part, so that on one hand, the stability of the sealing element body in the groove is improved, and the arrangement of the auxiliary lip ensures that moisture and dust cannot easily enter the hydraulic system to influence the operation of the hydraulic system.
Description
Technical Field
The utility model relates to the field of oil seal production, in particular to an extrusion-resistant and turnover-resistant waterproof and dustproof sealing piece for a hydraulic support.
Background
The hydraulic support is an important component in three frames of the underground fully mechanized mining face and is also the product with the highest value. Along with the development of hydraulic equipment to high pressure and high power, the requirements on the hydraulic cylinder are higher and higher, and further, the requirements on matched sealing elements of the hydraulic cylinder are also higher and higher.
The operation speed of the hydraulic support cylinder is slower, and the main working condition characteristics of the dust ring are that the load is large, the coal ash is heavy, and the dust ring of a wet well construction team also has a waterproof requirement.
The common dustproof ring has the advantages that the dustproof and waterproof effect is difficult to achieve, foreign matters and moisture easily enter the hydraulic system to influence the operation of the hydraulic system, and therefore the utility model provides the waterproof and dustproof sealing piece of the hydraulic support, which is extrusion-resistant and turnover-resistant.
Disclosure of Invention
In order to improve the dustproof and waterproof effect of the dustproof ring, so that foreign matters and water are not easy to enter a hydraulic system to influence the operation of the hydraulic system, the utility model provides the waterproof and dustproof sealing piece of the hydraulic support, which is extrusion-resistant and turnover-resistant.
The utility model provides a single-acting double-sealing lip dust ring, which relates to the following technical scheme:
an extrusion-resistant and overturn-resistant hydraulic bracket waterproof and dustproof seal, comprising:
a seal body located within the groove of the mating portion;
the auxiliary lip is fixedly connected with one side, deviating from the cylinder bottom of the hydraulic cylinder, of the sealing element body and is abutted against the end face of the matching part, and one side, close to the piston rod, of the auxiliary lip is abutted against the side face of the piston rod.
Further, vice lip includes conflict section and linkage segment, linkage segment and sealing member body fixed connection to contradict with one side that the cooperation portion deviates from the pneumatic cylinder bottom, conflict section cross-section sets up to triangle-shaped, just a side and the linkage segment fixed connection of conflict section, a contained angle position of conflict section contradicts with the piston rod global, and the contained angle is the acute angle.
Further, one side of the connecting section, which is away from the bottom of the hydraulic cylinder, is provided with an inclined plane.
Further, set up flutedly on the sealing member body, the recess is located the sealing member and is close to the pneumatic cylinder body, and deviates from one side of piston rod, be provided with the retaining ring on the sealing member body, retaining ring and recess joint cooperation, and the hardness of retaining ring is greater than the sealing member body.
Further, the retainer ring is in interference fit with the groove.
Further, the sealing element body is arranged close to the side wall of the piston rod at intervals with the peripheral wall of the piston rod, and a boss is fixedly connected to the sealing element body.
Further, the boss is annular arranged along the circumferential direction of the sealing element body.
Further, the seal body is in interference fit with the groove.
In summary, the present utility model includes at least the following beneficial technical effects:
1. the auxiliary lip is tightly abutted against the side wall of the matching part, so that on one hand, the stability of the sealing element body in the groove is improved, and the arrangement of the auxiliary lip ensures that moisture and dust are not easy to enter the hydraulic system to influence the operation of the hydraulic system;
2. the retaining ring is located sealing member body root external diameter department, provides certain anti-roll over effect for the sealing member body: when the piston rod extends, friction force causes the sealing element body to rotate, and the check ring with higher hardness can provide reliable support for the sealing element body, and particularly when the check ring is in a square groove, the effect of the check ring is more remarkable.
Drawings
FIG. 1 is a cross-sectional view of a dust ring according to an embodiment of the utility model.
Reference numerals illustrate: 1. a mating portion; 11. a groove; 12. a limiting block; 2. a seal body; 21. a groove; 22. a connecting block; 3. a secondary lip; 31. a collision section; 32. a connection section; 4. a boss; 5. and (5) a retainer ring.
Detailed Description
The present utility model will be described in further detail with reference to fig. 1.
The embodiment of the utility model discloses an extrusion-resistant and overturn-resistant waterproof and dustproof sealing piece for a hydraulic support.
Referring to fig. 1, the seal comprises a seal body 2 and a secondary lip 3.
The matching part 1 is provided with a groove 11, and the groove 11 is arranged along the circumferential direction of the piston rod. The groove 11 notch is set towards the piston rod, and the side of the groove 11 facing away from the cylinder bottom of the hydraulic cylinder is set as an opening. The cooperation portion 1 is provided with a limiting block 12 in an integrated mode, the limiting block 12 is located on one side, away from the bottom of the hydraulic cylinder, of the groove 11, and one side, close to the piston rod, of the limiting block 12 is arranged at intervals with the side wall of the piston rod.
The seal body 2 is located within the groove 11 and is in an interference fit with the groove 11. The sealing member body 2 is provided with a connecting block 22 on one side facing away from the cylinder bottom of the hydraulic cylinder. The connecting block 22 is located in the gap between the stopper 12 and the piston rod and is in interference fit with the gap. The vice lip 3 of sealing member and connecting block 22 keep away from one side fixed connection of sealing member body 2, and the vice lip 3 one side of sealing member is contradicted with the piston rod circumference, and the opposite side extends beyond the stopper 12 and is close to one side of piston rod to make sealing member body 2, connecting block 22 and vice lip 3 carry out the cladding to stopper 12, thereby make moisture, dust etc. be difficult for getting into the validity that influences hydraulic system in the clearance between stopper 12 and the sealing member body 2.
In order to reduce the friction between the seal body 2 and the piston rod, the seal body 2 and the connection block 22 are both arranged at a distance from the piston rod. The auxiliary lip 3 is in interference fit with the piston rod, and the auxiliary lip 3 comprises a connecting section 32 and an abutting section 31 which are integrally formed, wherein the connecting section 32 is fixedly connected with the connecting block 22 and abuts against the side face, deviating from the bottom of the piston cylinder, of the limiting block 12. The cross section of the abutting section 31 is triangular, one side surface of the abutting section 31 is fixedly connected with the connecting section 32, an included angle of the abutting section 31 abuts against the peripheral surface of the piston rod, the included angle is an acute angle, and the side surface of the abutting section 31 away from the bottom of the hydraulic cylinder is radially perpendicular to the piston rod, so that insufficient supporting force is not easy to occur when the auxiliary lip 3 pushes dust on the piston rod, and dust and the like enter a hydraulic system; in addition, the contact area between the abutting section 31 and the piston rod is reduced due to the arrangement of the abutting section 31.
One side of the connecting section 32, which is away from the bottom of the piston cylinder, is provided with an inclined surface, and the inclined surface is gradually inclined towards the direction close to the bottom of the cylinder along the direction away from the axis of the piston rod, so that the inclined surface plays a role in guiding dust or moisture and the like adhered to the connecting section 32, and impurities such as dust are not easy to gather towards the direction of the piston rod.
The sealing element body 2 is provided with a groove 21, and the groove 21 is positioned on one side of the sealing element body 2, which is close to the cylinder bottom of the hydraulic cylinder and far away from the axis of the piston rod, namely, the outer diameter of the root part of the sealing element body. The groove 21 is internally provided with a retainer ring 5, and the retainer ring 5 is in clamping fit with the groove 21 and is in interference fit with the groove 11. The hardness of the retainer ring 5 is higher than that of the sealing member body 2, and the cross section of the retainer ring 5 is rectangular. The sealing member body 2 in the embodiment is SHD54 high-hardness hydrolysis-resistant polyurethane; the retainer ring 5 is made of polyoxymethylene, so that when the piston rod extends, friction force makes the sealing element body 2 rotate anticlockwise around the end part of the limiting block 12, the retainer ring 5 can provide reliable support for the sealing element body 2, and especially when the groove 11 is square, the sealing element can be effectively prevented from overturning.
In order to reduce the contact surface of the sealing element body 2 and the piston rod, friction force between the sealing element body 2 and the piston rod is not easy to be too large, a gap exists between the sealing element body 2 and the piston rod, one side, close to the piston rod, of the sealing element body 2 is fixedly connected with a boss 4, the boss 4 is arranged to be annular along the circumferential direction of the piston rod, and the boss 4 and the sealing element body 2 are integrally formed. The boss 4 arranged in whole circle can bear the pressure brought by the unbalanced load of the system to provide necessary support.
In order to improve the strength of the boss 4, the cross section of the boss 4 is provided as an isosceles trapezoid.
The implementation principle of the embodiment of the utility model is as follows: when the piston rod operates, the interference section 31 of the auxiliary lip 3 scrapes dust and moisture on the piston rod, so that the dust and the moisture are not easy to enter the hydraulic system, and the operation of the hydraulic system is affected.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (7)
1. An anti-extrusion anti-roll-over hydraulic bracket waterproof and dustproof sealing member, comprising:
a seal body (2), the seal body (2) being located within a groove (11) of the mating portion (1);
the auxiliary lip (3) is fixedly connected with one side, deviating from the cylinder bottom of the hydraulic cylinder, of the sealing element body (2) and is in contact with the end face of the matching part (1), and one side, close to the piston rod, of the auxiliary lip (3) is in contact with the side face of the piston rod; the auxiliary lip (3) comprises an abutting section (31) and a connecting section (32), the connecting section (32) is fixedly connected with the sealing element body (2) and abuts against one side of the matching part (1) away from the cylinder bottom of the hydraulic cylinder, the section of the abutting section (31) is triangular, one side surface of the abutting section (31) is fixedly connected with the connecting section (32), an included angle position of the abutting section (31) abuts against the circumferential surface of the piston rod, and the included angle is an acute angle.
2. The extrusion-resistant and overturn-resistant hydraulic support waterproof and dustproof sealing member according to claim 1, wherein: one side of the connecting section (32) away from the bottom of the hydraulic cylinder is provided with an inclined plane.
3. The extrusion-resistant and overturn-resistant hydraulic support waterproof and dustproof sealing member according to claim 1, wherein: the sealing element is characterized in that a groove (21) is formed in the sealing element body (2), the groove (21) is located on one side, close to the cylinder body, of the hydraulic cylinder and away from the piston rod, a check ring (5) is arranged on the sealing element body (2), the check ring (5) is matched with the groove (21) in a clamping mode, and the hardness of the check ring (5) is greater than that of the sealing element body (2).
4. A hydraulic bracket waterproof and dustproof seal resistant to extrusion and overturning as claimed in claim 3, wherein: the retainer ring (5) is in interference fit with the groove (11).
5. The extrusion-resistant and overturn-resistant hydraulic support waterproof and dustproof sealing member according to claim 2, wherein: the sealing element body (2) is arranged close to the side wall of the piston rod at intervals with the peripheral wall of the piston rod, and a boss (4) is fixedly connected to the sealing element body (2).
6. The extrusion-resistant and overturn-resistant hydraulic support waterproof and dustproof sealing member according to claim 5, wherein: the boss (4) is annular and is circumferentially arranged along the sealing element body (2).
7. The extrusion-resistant and overturn-resistant hydraulic support waterproof and dustproof sealing member according to claim 1, wherein: the seal body (2) is in interference fit with the groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320855895.1U CN219827328U (en) | 2023-04-12 | 2023-04-12 | Extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320855895.1U CN219827328U (en) | 2023-04-12 | 2023-04-12 | Extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219827328U true CN219827328U (en) | 2023-10-13 |
Family
ID=88283915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320855895.1U Active CN219827328U (en) | 2023-04-12 | 2023-04-12 | Extrusion-resistant and overturning-resistant waterproof and dustproof sealing piece for hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219827328U (en) |
-
2023
- 2023-04-12 CN CN202320855895.1U patent/CN219827328U/en active Active
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