Sealing ring and liquid pumping structure

Abstract

The utility model belongs to the technical field of sealing and discloses a sealing ring and a liquid pumping structure, a first ring part is arranged at the first end of a base part and extends to the second end of the base part in an arc shape, a first opening is formed between the extending end of the first ring part and the second end of the base part, and a second ring part is arranged at the second end of the base part and extends to the second end of the base part in an arc shape. The first ring part is arranged on the base part and extends to the first end of the base part in an arc shape, a second opening is formed between the extending end of the second ring part and the first end of the base part, the first ring part and the second ring part are sequentially arranged in the axial direction of the sealing ring, and the first opening and the second opening are suitable for being opened when the sealing ring is pre-cooled and shrunk; the liquid pumping structure comprises a cylinder body, a piston and the sealing ring, the cylinder body is provided with a working cavity, the piston is arranged in the working cavity in a telescopic mode, and the sealing ring is sleeved on the piston. According to the sealing ring, a sealing leakage area does not appear on the whole, the sealing effect is effectively guaranteed, the sealing leakage area is prevented from being generated due to low-temperature cold contraction deformation, and the pumping efficiency is effectively guaranteed when the sealing ring is used on a liquid pumping structure.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a sealing ring and a pump liquid structure. Background Art

[0002] Currently, pumping systems include hydraulic cylinders, which consist of a cylinder body and a retractable piston within the cylinder body. It's understandable that the gap between the piston and the cylinder body creates leakage. The larger the gap, the higher the leakage rate, and correspondingly, the lower the pumping efficiency. Therefore, in the prior art, a sealing ring is mounted on the piston of the hydraulic cylinder. This seals the gap between the piston and the cylinder body, effectively preventing leakage and ensuring pumping efficiency.

[0003] To facilitate the installation of sealing rings, they are typically designed with an open C-shaped structure. When installed on the piston, the ring opening remains nearly closed at normal temperatures. However, because some pumping structures operate at relatively low liquid temperatures, reaching -200°C, and sealing rings are typically made of ultra-high polymer materials with a large coefficient of linear expansion, the rings experience significant shrinkage at low temperatures, causing the ring opening to widen. This widening of the ring opening creates a leaky seal, reducing the sealing effectiveness of the ring, increasing the leakage rate, and significantly reducing the hydraulic cylinder's pumping efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a sealing ring and a pump liquid structure, which can effectively ensure the sealing effect, avoid the sealing leakage area caused by low-temperature shrinkage deformation, and effectively ensure the pumping efficiency.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A sealing ring comprises a base, a first ring portion and a second ring portion; wherein,

[0007] The first ring portion is provided at the first end of the base portion and extends in an arc shape to the second end of the base portion, and a first opening is formed between the extended end of the first ring portion and the second end of the base portion; the second ring portion is provided at the second end of the base portion and extends in an arc shape to the first end of the base portion, and a second opening is formed between the extended end of the second ring portion and the first end of the base portion;

[0008] The first ring portion and the second ring portion are sequentially arranged along the axial direction of the sealing ring;

[0009] The first opening and the second opening are adapted to open when the sealing ring is pre-cooled and shrunk.

[0010] Preferably, the first ring portion and the second ring portion are arranged in close contact with each other along the axial direction of the sealing ring.

[0011] Preferably, the side of the first ring portion facing away from the second ring portion is flush with the base portion on the same side; and the side of the second ring portion facing away from the first ring portion is flush with the base portion on the same side.

[0012] Preferably, the base portion, the first ring portion, and the second ring portion have equal thickness.

[0013] Preferably, projections of the outer periphery of the base portion, the outer periphery of the first ring portion, and the outer periphery of the second ring portion along the axial direction of the sealing ring are located within the same circular trajectory.

[0014] Preferably, the base, the first ring portion and the second ring portion are made of ultra-high molecular weight polyethylene.

[0015] Preferably, the first ring portion and the base portion are integrally formed, and the second ring portion and the base portion are integrally formed.

[0016] A liquid pump structure, comprising:

[0017] A cylinder body having a working chamber;

[0018] The piston is telescopically arranged in the working chamber, and the sealing ring described in any one of the above items is sleeved on the piston.

[0019] Preferably, the number of the sealing rings is set to be multiple, and the multiple sealing rings are sleeved on the piston at intervals.

[0020] Preferably, a embedding groove is provided on the piston, and the sealing ring is sleeved on the embedding groove.

[0021] Beneficial effects:

[0022] The present invention provides a sealing ring comprising a base, a first ring portion, and a second ring portion. The first ring portion extends in an arc shape from the first end of the base to the second end of the base, forming a first opening therebetween. The second ring portion extends in an arc shape from the second end of the base to the first end of the base, forming a second opening therebetween. The first opening and the second opening are located at opposite ends of the base, respectively, i.e., the first opening and the second opening are offset. At room temperature, when no cold shrinkage occurs, the first ring portion extends to the second end of the base and abuts the second end of the base, while the second ring portion extends to the first end of the base and abuts the first end of the base. When operating under low-temperature conditions, even if the first and second openings open due to cold shrinkage, the offset arrangement of the first and second openings allows the first opening to be shielded by the second ring portion at its open position, while the second opening to be shielded by the first ring portion at its open position. This prevents leakage from occurring in the sealing ring as a whole, thereby effectively ensuring a good sealing effect.

[0023] When the sealing ring is used on a pump liquid structure, no sealing leakage area will appear on the entire sealing ring, thereby effectively ensuring the sealing effect and further effectively ensuring the pump suction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The utility model is a schematic diagram of the structure of the sealing ring provided by the utility model under normal conditions;

[0025] Figure 2 The utility model is a structural schematic diagram of the sealing ring provided by the utility model when it contracts under cold conditions;

[0026] Figure 3 The utility model is a cross-sectional schematic diagram of the pump liquid structure provided by the utility model.

[0027] In the picture:

[0028] 1. Sealing ring; 11. Base; 111. First opening; 112. Second opening; 12. First ring portion; 13. Second ring portion;

[0029] 2. Cylinder body;

[0030] 3. Piston; 31. Groove. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0035] This embodiment provides a sealing ring. Figures 1 to 2 As shown, the sealing ring includes a base 11, a first ring portion 12, and a second ring portion 13. The first ring portion 12 is located at the first end of the base 11 and extends in an arc shape to the second end of the base 11. A first opening 111 is formed between the extended end of the first ring portion 12 and the second end of the base 11. The second ring portion 13 is located at the second end of the base 11 and extends in an arc shape to the first end of the base 11. A second opening 112 is formed between the extended end of the second ring portion 13 and the first end of the base 11. The first and second ring portions 12, 13 are arranged sequentially along the axial direction of the sealing ring. The first and second openings 111, 112 are adapted to open when the sealing ring shrinks during pre-cooling.

[0036] In this embodiment, the first ring portion 12 extends in an arc shape from the first end of the base 11 to the second end of the base 11, and forms a first opening 111 between the first ring portion 12 and the second end of the base 11. The second ring portion 13 extends in an arc shape from the second end of the base 11 to the first end of the base 11, and forms a second opening 112 between the first ring portion 13 and the first end of the base 11. The first opening 111 and the second opening 112 are respectively located at opposite ends of the base 11, that is, the first opening 111 and the second opening 112 are staggered. When no cold shrinkage deformation occurs at room temperature, the first ring portion 12 extends to the second end of the base 11 and abuts the second end of the base 11, and the second ring portion 13 extends to the first end of the base 11 and abuts the first end of the base 11. When working under low temperature conditions, even if the first opening 111 and the second opening 112 are opened when they shrink and deform at low temperature, the first opening 111 and the second opening 112 are set to be staggered. The open position of the first opening 111 can be blocked by the second ring portion 13, and the open position of the second opening 112 can be blocked by the first ring portion 12, so that the sealing ring as a whole will no longer have a sealing leakage area, thereby effectively ensuring the sealing effect.

[0037] In this embodiment, the first ring portion 12 and the second ring portion 13 are arranged in close contact along the axial direction of the sealing ring. Specifically, when the first opening 111 is opened, the first ring portion 12 and the second ring portion 13 are in close contact with each other, so there is no gap between them, and the first opening 111 can be reliably and effectively blocked. When the second opening 112 is opened, the first ring portion 12 and the second ring portion 13 are in close contact with each other, so there is no gap between them, and the second opening 112 can be reliably and effectively blocked, further ensuring the overall sealing effect of the sealing ring.

[0038] In this embodiment, the side of the first ring portion 12 facing away from the second ring portion 13 is flush with the base portion 11 on the same side, and the side of the second ring portion 13 facing away from the first ring portion 12 is flush with the base portion 11 on the same side. This arrangement allows the sealing ring to form a regular annular structure, which is neat and easy to process.

[0039] In this embodiment, the base 11, the first ring portion 12, and the second ring portion 13 have equal thickness. With this arrangement, when the base 11, the first ring portion 12, and the second ring portion 13 are positioned face-to-face, their inner and outer surfaces can all be flush with each other. Furthermore, the sealing ring formed by the base 11, the first ring portion 12, and the second ring portion 13 has equal inner and outer diameters, resulting in a neat structure, easy processing, and greater suitability for fitting within an object.

[0040] In this embodiment, the projections of the outer periphery of the base portion 11, the outer periphery of the first ring portion 12, and the outer periphery of the second ring portion 13 along the axial direction of the sealing ring lie within the same circular trajectory. This arrangement allows the outer periphery of the sealing ring, formed by the base portion 11, the first ring portion 12, and the second ring portion 13, to form a smooth arc surface, resulting in a regular structure, easy processing, and better fit with components on the outer side of the sealing ring, effectively ensuring a good seal.

[0041] In this embodiment, the first ring portion 12 is integrally formed with the base portion 11, and the second ring portion 13 is integrally formed with the base portion 11. This configuration is simple in structure and easy to manufacture, avoids the need for connectors such as screws, and eliminates the need for separate assembly steps.

[0042] As an optional embodiment, a sliding groove (not shown) is provided on one of the end surfaces of the first ring portion 12 facing the second ring portion 13 and the end surface of the second ring portion 13 facing the first ring portion 12, and a sliding head (not shown) is correspondingly provided on the other end surface. The sliding head is located in the sliding groove and slidably connected to the sliding groove. Specifically, when the sealing ring contracts when cooled, the first ring portion 12 becomes misaligned with the second ring portion 13. At this time, the sliding head can slide in the sliding groove. This arrangement can strictly limit the movement between the first ring portion 12 and the second ring portion 13, so that the first ring portion 12 and the second ring portion 13 can only move relative to each other strictly along the circumferential direction of the sealing ring.

[0043] Optionally, the first opening 111 and / or the second opening 112 are configured in an I-shape or a Z-shape. Specifically, the I-shape has the advantage of being more solid and reliable, and having high strength; the Z-shape has the advantage of further avoiding the generation of a sealing leakage area when the ring body is deformed and opened due to low-temperature shrinkage.

[0044] Reference Figure 3 As shown, this embodiment also provides a pump structure. The pump structure includes a cylinder 2, a piston 3 and the aforementioned sealing ring 1. Specifically, the cylinder 2 has a working chamber, the piston 3 is telescopically arranged in the working chamber, and the aforementioned sealing ring 1 is sleeved on the piston 3.

[0045] Specifically, when the sealing ring 1 is used on a pump liquid structure, at normal temperatures, the first opening 111 and the second opening 112 of the sealing ring 1 are approximately in a closed state. When the pump liquid structure operates under low-temperature conditions, the first opening 111 and the second opening 112 open when they shrink and deform at low temperatures. The first opening 111 and the second opening 112 are respectively located at the two ends of the base, that is, the first opening 111 and the second opening 112 are staggered, and the open position of a single opening can be blocked by the adjacent ring portion, so that the sealing ring 1 as a whole will no longer have a sealing leakage area, effectively ensuring the sealing effect between the cylinder body 2 and the piston 3, maintaining a low leakage rate when the piston 3 reciprocates, and thus ensuring a high pumping efficiency.

[0046] Specifically, the piston 3 is provided with an embedding groove 31, and the sealing ring 1 is sleeved on the embedding groove 31. The setting of the embedding groove 31 provides a reliable installation space for the sealing ring 1, ensuring that the sealing ring 1 is reliably and stably sleeved on the piston 3 and preventing the sealing ring 1 from moving randomly.

[0047] Specifically, the side of the first ring portion 12 facing away from the second ring portion 13 is flush with the base 11 on the same side, and the side of the second ring portion 13 facing away from the first ring portion 12 is flush with the base 11 on the same side, and the thickness of the base 11, the first ring portion 12 and the second ring portion 13 are equal, that is, the overall inner diameter of the sealing ring remains consistent, which can also effectively reduce the processing difficulty of the embedding groove 31.

[0048] Optionally, the number of sealing rings 1 is set to be multiple, and the multiple sealing rings 1 are sleeved on the piston 3 at intervals. The provision of multiple sealing rings 1 further ensures a reliable seal between the cylinder body 2 and the piston 3.

[0049] In this embodiment, the sealing ring 1 is generally made of an ultra-high molecular weight material with a large linear expansion coefficient. For example, the base 11, first ring portion 12, and second ring portion 13 are constructed from ultra-high molecular weight polyethylene (UHMW-PE). Ultra-high molecular weight polyethylene (UHMW-PE) is a linear thermoplastic engineering plastic with excellent overall performance, including superior wear resistance, self-lubrication, high strength, chemical stability, and strong aging resistance.

[0050] Optionally, in addition to the sealing ring 1, the piston 3 is also provided with positioning rings (not shown) at both ends of the axial direction of the piston 3. The provision of the positioning rings can ensure that the piston 3 and the cylinder body 2 are coaxial, and prevent the piston 3 from axially deviating from the cylinder body 2 and causing excessive wear of the piston 3.

[0051] In summary, the sealing ring 1 provided in this embodiment has a simple structure and is easy to process. It can effectively ensure the sealing effect and avoid the sealing leakage area caused by low-temperature shrinkage deformation. When used in a pump liquid structure, it can effectively ensure the pumping efficiency and is reliable and practical.

[0052] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A sealing ring, characterized in that: It comprises a base portion (11), a first ring portion (12) and a second ring portion (13); wherein, The first ring portion (12) is provided at the first end of the base portion (11) and extends in an arc shape to the second end of the base portion (11), and a first opening (111) is formed between the extended end of the first ring portion (12) and the second end of the base portion (11); the second ring portion (13) is provided at the second end of the base portion (11) and extends in an arc shape to the first end of the base portion (11), and a second opening (112) is formed between the extended end of the second ring portion (13) and the first end of the base portion (11); The first ring portion (12) and the second ring portion (13) are sequentially arranged along the axial direction of the sealing ring; The first opening (111) and the second opening (112) are adapted to open when the sealing ring is pre-cooled and shrunk.

2. The sealing ring according to claim 1, characterized in that The first ring portion (12) and the second ring portion (13) are arranged in close contact with each other along the axial direction of the sealing ring.

3. The sealing ring according to claim 1, characterized in that The side of the first ring portion (12) facing away from the second ring portion (13) is flush with the base portion (11) on the same side; and the side of the second ring portion (13) facing away from the first ring portion (12) is flush with the base portion (11) on the same side.

4. The sealing ring according to claim 1, characterized in that The base portion (11), the first ring portion (12) and the second ring portion (13) have the same thickness.

5. The sealing ring according to claim 1, characterized in that Projections of the outer periphery of the base portion (11), the outer periphery of the first ring portion (12), and the outer periphery of the second ring portion (13) along the axial direction of the sealing ring are located within the same circular trajectory.

6. The sealing ring according to claim 1, characterized in that The base (11), the first ring portion (12) and the second ring portion (13) are made of ultra-high molecular weight polyethylene.

7. The sealing ring according to claim 1, characterized in that The first ring portion (12) and the base portion (11) are integrally formed, and the second ring portion (13) and the base portion (11) are integrally formed.

8. A liquid pump structure, characterized in that: include: A cylinder body (2) having a working chamber; A piston (3) is telescopically arranged in the working chamber, and a sealing ring (1) as described in any one of claims 1 to 7 is sleeved on the piston (3).

9. The liquid pump structure according to claim 8, characterized in that: The number of the sealing rings (1) is set to be multiple, and the multiple sealing rings (1) are sleeved on the piston (3) at intervals.

10. The liquid pump structure according to claim 8, characterized in that: The piston (3) is provided with an embedding groove (31), and the sealing ring (1) is sleeved on the embedding groove (31).

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