Hydraulic support piston sealing ring
By combining the phenolic clamp retaining ring, polyurethane sealing body and rubber elastomer in the hydraulic cylinder bracket piston sealing ring, the limit bump and groove are used to cooperate, the problem of poor sealing performance under narrow grooves is solved, and a higher level of The wear resistance and sealing effect extend the service life and reduce the frequency of repairs.
Patent Information
- Application Number
- CN202421235328.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-31
AI Technical Summary
The existing hydraulic cylinder bracket piston seal ring is prone to bite and tear due to high pressure when the narrow groove width is less than 16mm, and the sealing performance is poor, making it difficult to meet the needs of high working resistance and long service life.
The phenolic clamping ring is used to combine with the polyurethane seal, the rubber elastic body is embedded in the groove, and the limit bumps are matched with the groove to provide interference and elastic support, enhance the sealing effect and prevent displacement.
It improves the wear resistance and sealing performance of the sealing ring, extends the service life, reduces the frequency and cost of maintenance, and enhances the resistance to high pressure.
Smart Images
Figure CN222315923U_ABST
Abstract
Description
Technical Field
[0001] The embodiment of the utility model relates to the technical field of mechanical auxiliary accessories, and in particular to a hydraulic support piston sealing ring. Background Art
[0002] The existing traditional piston seal ring structure for hydraulic cylinder supports generally adopts the old pure polyurethane structure or the composite structure composed of polyurethane main body, rubber elastomer, and rectangular polyoxymethylene retaining ring, which can basically meet the use requirements and warranty period of the mine. However, due to the introduction of foreign narrow groove width <16mm, although the cost can be reduced in the manufacture of hydraulic supports, the difficulty of matching seals has increased several times. Especially in recent years, with the increase in maintenance supports and the continuous emergence of large mining height coal mines, the working resistance is as large as 29000KN, the mining height is 10 meters, and the cylinder diameter is 630mm. In this case, the groove size is very narrow, and the pressure is particularly large. The instantaneous pressure exceeds 90MPa, which is easy to cause displacement when the piston reciprocates, causing polyurethane to bite and tear. Therefore, more wear-resistant materials and more reasonable sealing structures are needed to ensure the performance of the seal to meet customer needs.
[0003] Therefore, it is necessary to improve one or more problems existing in the above-mentioned related technical solutions.
[0004] It should be noted that this section is intended to provide background or context for the technical solutions of the utility model stated in the claims. The description herein is not admitted to be prior art by inclusion in this section. Utility Model Content
[0005] The purpose of the utility model is to provide a hydraulic support piston sealing ring, thereby solving one or more problems caused by the limitations and defects of the relevant technology at least to a certain extent.
[0006] The utility model provides a hydraulic support piston sealing ring, comprising:
[0007] Phenolic cloth retaining rings arranged oppositely;
[0008] The polyurethane sealing body is annular and is arranged between two phenolic cloth retaining rings; the inner circle centers of the phenolic cloth retaining ring and the polyurethane sealing body are on the same axis, and the inner circle diameters of the phenolic cloth retaining ring and the polyurethane sealing body are equal; the two end faces of the polyurethane sealing body are respectively fitted with the phenolic cloth retaining ring; an embedding groove is provided on the inner circle side wall of the polyurethane sealing body along the inner circle circumference of the phenolic cloth retaining ring; the outer circle diameter of the polyurethane sealing body is larger than the outer circle diameter of the phenolic cloth retaining ring;
[0009] The rubber elastic body is in the shape of a ring; the rubber elastic body is embedded in the embedding groove, and the inner diameter of the rubber elastic body is smaller than the inner diameter of the phenolic cloth retaining ring.
[0010] In the utility model, a limiting convex block is arranged at the bottom of the embedding groove.
[0011] In the utility model, the limiting protrusion and the polyurethane sealing body are integrally formed.
[0012] In the utility model, a limiting groove is provided on the rubber elastic body at a position corresponding to the limiting protrusion.
[0013] In the utility model, the limiting groove and the limiting protrusion are interference fit.
[0014] In the utility model, the rubber elastic body is interference fit with the embedding groove.
[0015] In the utility model, the ring width at the end surface of the polyurethane sealing body is equal to the ring width of the phenolic cloth-reinforced retaining ring.
[0016] In the utility model, the ring width at the end surface of the rubber elastic body is equal to the groove depth which is smaller than the embedding groove.
[0017] The technical solution provided by the utility model may have the following beneficial effects:
[0018] The utility model has a polyurethane seal body with an outer diameter larger than an outer diameter of a phenolic cloth-reinforced retaining ring, and the portion protruding from the phenolic cloth-reinforced retaining ring is the interference fit of the polyurethane seal body, which plays a major sealing role; and the rubber elastic body is embedded in the embedding groove, which can prevent displacement with the polyurethane seal body and cause premature failure of the seal, and can also provide elasticity for the polyurethane seal body, compensating for the disadvantage of poor elasticity of the polyurethane material. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0020] Figure 1 A schematic structural diagram showing a cross section of a piston seal ring of a hydraulic support in an exemplary embodiment of the utility model is shown.
[0021] In the figure, 1. phenolic cloth retaining ring; 2. rubber elastic body; 3. polyurethane sealing body; 31. embedding groove; 32. limiting protrusion; 21. limiting groove. DETAILED DESCRIPTION
[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0023] In addition, the accompanying drawings are only schematic illustrations of embodiments of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and their repeated descriptions will be omitted. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities.
[0024] In this example implementation, a hydraulic support piston seal ring is first provided. Figure 1 As shown, including:
[0025] The phenolic cloth retaining ring 1 is arranged opposite to each other; the phenolic cloth retaining ring 1 has the characteristics of high strength and high hardness, which can prevent the polyurethane sealing body 3 from being cut or bitten by high-pressure impact.
[0026] The polyurethane sealing body 3 is annular and is arranged between two phenolic cloth retaining rings 1; the phenolic cloth retaining rings 1 at both ends of the polyurethane sealing body 3 prevent the polyurethane sealing body 3 from being damaged by high-pressure impact; the inner circle centers of the phenolic cloth retaining ring 1 and the polyurethane sealing body 3 are on the same axis, and the inner circle diameters of the phenolic cloth retaining ring 1 and the polyurethane sealing body 3 are equal; the two end faces of the polyurethane sealing body 3 are respectively fitted with the phenolic cloth retaining ring 1; an embedding groove 31 is provided on the inner circle side wall of the polyurethane sealing body 3 along the inner circle circumference of the phenolic cloth retaining ring 1; the outer circle diameter of the polyurethane sealing body 3 is larger than the outer circle diameter of the phenolic cloth retaining ring 1, and in actual work, the part of the polyurethane sealing body 3 that is larger than the outer circle diameter of the phenolic cloth retaining ring 1 is squeezed, thereby providing a better sealing effect;
[0027] The rubber elastic body 2 is annular; the rubber elastic body 2 is embedded in the embedding groove 31, and the inner diameter of the rubber elastic body 2 is smaller than the inner diameter of the phenolic cloth retaining ring 1. The rubber elastic body 2 is embedded in the embedding groove 31 to provide elasticity for the polyurethane sealing body 3, so as to avoid the polyurethane sealing body 3 from having a gap with the cylinder body after being squeezed and deformed for a long time, thereby reducing the sealing effect; and the inner diameter of the rubber elastic body 2 is smaller than the inner diameter of the phenolic cloth retaining ring 1, that is, the rubber elastic body 2 has an interference fit. When the rubber elastic body 2 is squeezed, due to the elasticity of the rubber elastic body 2 itself, when the polyurethane sealing body 3 is squeezed and deformed for a long time, it can continuously provide outward pressure to the polyurethane sealing body 3, thereby extending the service life of the piston seal ring of the hydraulic support of the utility model, reducing the maintenance frequency of the hydraulic support, and playing a role in saving costs.
[0028] The utility model has an outer diameter of the polyurethane sealing body 3 that is larger than the outer diameter of the phenolic cloth-reinforced retaining ring 1, and the portion protruding from the phenolic cloth-reinforced retaining ring 1 is the interference fit of the polyurethane sealing body 3, which plays a major sealing role; the rubber elastic body 2 is embedded in the embedding groove 31, which can prevent displacement with the polyurethane sealing body 3 and cause premature failure of the seal, and can also provide elasticity for the polyurethane sealing body 3, compensating for the disadvantage of poor elasticity of the polyurethane material.
[0029] Optionally, in some embodiments, a limiting protrusion 32 is provided at the bottom of the embedding groove 31. Due to the elasticity of the rubber elastic body 2, the limiting protrusion 32 can be embedded in the rubber elastic body 2 during operation to prevent the polyurethane sealing body 3 or the rubber elastic body 2 from falling out of the phenolic cloth retaining ring 1, thereby damaging the piston sealing ring of the hydraulic support of the utility model and losing the sealing effect.
[0030] Optionally, in some embodiments, the limiting protrusion 32 is integrally formed with the polyurethane seal 3. The limiting protrusion 32 and the polyurethane seal 3 can also be connected by gluing or other fixed connection methods. The limiting protrusion 32 mainly plays a limiting role to prevent the polyurethane seal 3 and the rubber elastic body 2 from being displaced, so that the polyurethane seal 3 or the rubber elastic body 2 can be separated from the phenolic cloth retaining ring 1. The limiting protrusion 32 is integrally formed with the polyurethane seal 3, which can prevent the limiting protrusion 32 from being separated from the polyurethane seal 3 during operation, so that the limiting protrusion 32 loses its limiting function.
[0031] Optionally, in some embodiments, a limiting groove 21 is provided on the rubber elastic body 2 at a position corresponding to the limiting protrusion 32. By providing the limiting groove 21 on the rubber elastic body 2, the limiting protrusion 32 is embedded in the limiting groove 21, and the limiting protrusion 32 cooperates with the limiting groove 21 to limit the polyurethane sealing body 3 and the rubber elastic body 2.
[0032] Optionally, in some embodiments, the limiting groove 21 is interference fit with the limiting protrusion 32. Through the interference fit between the limiting groove 21 and the limiting protrusion 32, the limiting protrusion 32 can be more closely connected with the limiting groove 21, preventing the limiting groove 21 from being separated from the limiting protrusion 32 during operation, thereby losing the limiting function.
[0033] The limiting protrusion 32 and the limiting groove 21 further prevent the hydraulic support piston seal ring of the utility model from being displaced by the rubber elastic body 2 and the polyurethane seal body 3 after being subjected to high pressure, causing the seal to fail prematurely. The high strength and high hardness of the phenolic cloth retaining ring 1 can prevent the polyurethane seal body 3 from being cut or bitten by high pressure impact.
[0034] Optionally, in some embodiments, the rubber elastic body 2 is interference fit with the embedding groove 31. This further prevents the rubber elastic body 2 from coming out of the embedding groove 31, causing the rubber elastic body 2 to separate from the polyurethane sealing body 3, and causing the piston sealing ring of the hydraulic support of the utility model to lose its sealing function.
[0035] Optionally, in some embodiments, the ring width at the end face of the polyurethane seal 3 is equal to the ring width of the phenolic cloth retaining ring 1. This prevents the polyurethane seal 3 from being squeezed into the gap between the cylinder and the piston little by little over time when the piston reciprocates, thereby preventing the polyurethane seal 3 from being bitten or torn.
[0036] Optionally, in some embodiments, the ring width at the end face of the rubber elastic body 2 is equal to the groove depth smaller than the embedding groove 31. When the rubber elastic body 2 is squeezed, because the ring width at the end face of the rubber elastic body 2 is equal to the groove depth smaller than the embedding groove 31, the side wall of the rubber elastic body 2 near the end face will not exceed the main body of the rubber elastic body 2, and the rubber elastic body 2 will not generate tension due to a part of it being torn off during work, so that the rubber elastic body 2 will not fall out of the polyurethane sealing body 3, thereby losing the sealing effect.
[0037] The utility model discloses a hydraulic support piston sealing ring, and the specific working process is as follows:
[0038] The utility model provides elasticity to the polyurethane sealing body 3 through the rubber elastic body 2 during the working process of the piston sealing ring of the hydraulic support, thereby compensating for the disadvantage of poor elasticity of the polyurethane sealing body 3. The rubber elastic body 2 is embedded in the embedding groove 31 to prevent the polyurethane sealing body 3 from displacement; the outer diameter of the polyurethane sealing body 3 is larger than the outer diameter of the phenolic cloth retaining ring 1, and the part protruding from the phenolic cloth retaining ring 1 is the interference of the polyurethane sealing body 3, and the length of one side where the polyurethane sealing body 3 and the phenolic cloth retaining ring 1 are in contact is equal. By making the length of one side where the polyurethane sealing body 3 and the phenolic cloth retaining ring 1 are in contact, and the polyurethane sealing body 3 protrudes out of the phenolic cloth retaining ring 1, it is prevented that the polyurethane sealing body 3 is squeezed into the gap between the cylinder and the piston little by little over time when the piston reciprocates, and the polyurethane sealing body 3 is prevented from being bitten or torn. Furthermore, the rubber elastic body 2 protrudes out of the phenolic cloth retaining ring 1; the part protruding from the phenolic cloth retaining ring 1 is the interference fit of the rubber elastic body 2, which provides elasticity for the polyurethane sealing body 3, thereby improving the sealing effect of the piston sealing ring of the hydraulic support of the utility model; by arranging a limiting protrusion 32 at the bottom of the embedding groove 31, a limiting groove 21 is opened on the rubber elastic body 2 at a position corresponding to the limiting protrusion 32, and the limiting protrusion 32 cooperates with the limiting groove 21, thereby further preventing the narrow groove high-pressure resistant piston seal of the hydraulic support of the utility model from being displaced by the rubber elastic body 2 and the polyurethane sealing body 3 after being subjected to high pressure, thereby causing the seal to fail prematurely.
[0039] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like that may appear in the above description indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the utility model.
[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0041] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0042] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.
[0044] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.
Claims
1. A hydraulic support piston seal ring, characterized in that: include: Phenolic cloth retaining rings arranged oppositely; A polyurethane seal body, the polyurethane seal body is annular and is arranged between the two phenolic cloth retaining rings; the inner circle centers of the phenolic cloth retaining ring and the polyurethane seal body are on the same axis, and the inner circle diameters of the phenolic cloth retaining ring and the polyurethane seal body are equal; the two end faces of the polyurethane seal body are respectively fitted with the phenolic cloth retaining ring; an embedding groove is provided on the inner circle side wall of the polyurethane seal body along the inner circle circumference of the phenolic cloth retaining ring; the outer circle diameter of the polyurethane seal body is larger than the outer circle diameter of the phenolic cloth retaining ring; The rubber elastic body is in the shape of a ring; the rubber elastic body is embedded in the embedding groove, and the inner diameter of the rubber elastic body is smaller than the inner diameter of the phenolic cloth retaining ring.
2. The hydraulic support piston seal ring according to claim 1, characterized in that: A limiting protrusion is arranged at the bottom of the embedding groove.
3. The hydraulic support piston seal ring according to claim 2, characterized in that: The limiting protrusion is integrally formed with the polyurethane sealing body.
4. The hydraulic support piston seal ring according to claim 3, characterized in that: A limiting groove is provided on the rubber elastic body at a position corresponding to the limiting protrusion.
5. The hydraulic support piston seal ring according to claim 4, characterized in that: The limiting groove and the limiting protrusion are interference fit.
6. The hydraulic support piston seal ring according to claim 5, characterized in that: The rubber elastic body is interference fit with the embedding groove.
7. The hydraulic support piston seal ring according to claim 6, characterized in that: The ring width at the end surface of the polyurethane sealing body is equal to the ring width of the phenolic cloth retaining ring.
8. The hydraulic support piston seal ring according to claim 7, characterized in that: The ring width at the end surface of the rubber elastic body is equal to the groove depth which is smaller than the embedding groove.