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, the sealing ring comprises at least two ring bodies, the at least two ring bodies are arranged in an attached mode in the axial direction, each ring body is provided with an opening, the openings are suitable for being opened when the ring bodies contract when being cooled, and in the at least two ring bodies, the openings of every two adjacent ring bodies are arranged in a staggered mode; 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 provided by the utility model, even if the opening of each ring body of the sealing ring is opened during low-temperature cold contraction deformation, the plurality of openings are arranged in a staggered manner, and the opening position of a single opening can be shielded by the adjacent ring body, so that a sealing leakage area does not appear on the whole sealing ring, and the sealing effect is effectively ensured; and the sealing leakage area caused by low-temperature cold contraction deformation is avoided, and the pumping efficiency is effectively guaranteed when the sealing structure is applied to 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 liquid pumping structure. Background Art

[0002] At present, a liquid pumping structure includes a hydraulic cylinder, and the hydraulic cylinder includes a cylinder body and a piston telescopically arranged in the cylinder body. It can be understood that a gap is formed between the piston and the cylinder body, resulting in leakage. The larger the gap, the higher the leakage rate, and correspondingly, the lower the pumping efficiency of the pump. Therefore, in the prior art, a sealing ring is sleeved on the piston of the hydraulic cylinder. The arrangement of the sealing ring blocks the gap between the piston and the cylinder body, thereby effectively suppressing leakage and ensuring the pumping efficiency of the pump.

[0003] For the convenience of installing the sealing ring, the sealing ring is generally arranged in a C-shaped structure with an opening. When the sealing ring is installed on the piston, at a conventional temperature, the opening of the sealing ring is in an approximately closed state. However, since the temperature of the liquid pumped by some liquid pumping structures is relatively low, reaching -200°C, and the sealing ring generally uses a super high molecular material with a large coefficient of linear expansion, the sealing ring undergoes obvious cold shrinkage deformation at low temperatures, causing the opening of the sealing ring to widen. The widening of the opening of the sealing ring will result in a sealing leakage area, thus reducing the sealing effect of the sealing ring, increasing the leakage rate, and significantly decreasing the pumping efficiency of the hydraulic cylinder. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing ring and a liquid pumping structure, which can effectively ensure the sealing effect, avoid the generation of a sealing leakage area due to cold shrinkage deformation at low temperatures, and effectively ensure the pumping efficiency.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A sealing ring includes at least two ring bodies. The at least two ring bodies are arranged in a fitting manner along the axial direction. Each ring body has an opening, and the opening is adapted to open when the ring body contracts due to cold. Among the at least two ring bodies, the openings of every two adjacent ring bodies are arranged in a staggered manner.

[0007] Preferably, it includes a first ring body and a second ring body. The first ring body has a first opening, and the second ring body has a second opening. Among them,

[0008] The first ring body includes a first ring portion and a second ring portion with a stepped outer peripheral wall. The outer diameter of the first ring portion is greater than the outer diameter of the second ring portion. The second ring body includes a third ring portion and a fourth ring portion with a stepped inner peripheral wall. The inner diameter of the third ring portion is greater than the inner diameter of the fourth ring portion.

[0009] The second ring portion is inserted into the third ring portion and abuts against the fourth ring portion, and the third ring portion abuts against the first ring portion.

[0010] Preferably, the outer peripheral walls of the first ring portion and the second ring portion are connected by a first stepped end face, the inner peripheral walls of the third ring portion and the fourth ring portion are connected by a second stepped end face, the second ring portion abuts against the second stepped end face, and the third ring portion abuts against the first stepped end face.

[0011] Preferably, the outer diameter of the first ring portion is equal to the outer diameter of the second ring body, and the inner diameter of the fourth ring portion is equal to the inner diameter of the first ring body.

[0012] Preferably, it includes a first ring body and a second ring body. The first ring body has a first opening, and the second ring body has a second opening; wherein,

[0013] A plug is provided on the first ring body, and a ring groove is formed on the second ring body. The plug is inserted into the ring groove.

[0014] Preferably, the misalignment angle between the first opening and the second opening is 180°.

[0015] Preferably, the shape of the opening is set as an I shape or a Z shape.

[0016] A liquid pumping structure includes:

[0017] A cylinder block having a working chamber;

[0018] A piston is telescopically arranged in the working chamber, and the sealing ring described in any one of the above 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, an embedding groove is formed on the piston, and the sealing ring is sleeved on the embedding groove.

[0021] Beneficial effects:

[0022] The sealing ring provided by the present utility model includes at least two ring bodies that are axially abutted. Each ring body has an opening, and the opening is adapted to open when the ring body contracts due to cold. Among the at least two ring bodies, every two adjacent ring bodies are arranged with misaligned openings. When working under low-temperature conditions, even if each ring body of the sealing ring opens when contracting due to low temperature, but the multiple openings are misaligned, the opening position of a single opening can be blocked by the adjacent ring bodies, so that no sealing leakage area will appear in the overall sealing ring, thus effectively ensuring the sealing effect.

[0023] When the sealing ring is used in a pump liquid structure, there will be no sealing leakage area in the whole sealing ring, effectively ensuring the sealing effect and thus effectively ensuring the pump suction efficiency. Brief Description of the Drawings

[0024] Figure 1 is a schematic structural view of the sealing ring provided by the present utility model when it is cold-shrunk;

[0025] Figure 2 is an exploded view of the sealing ring provided by the present utility model when it is cold-shrunk;

[0026] Figure 3 is a schematic structural view of the sealing ring provided by the present utility model under normal conditions;

[0027] Figure 4 is an exploded view of the sealing ring provided by the present utility model under normal conditions;

[0028] Figure 5 is a schematic cross-sectional view of the pump liquid structure provided by the present utility model.

[0029] In the figure:

[0030] 1. Sealing ring; 11. First ring body; 1101. First opening; 111. First ring part; 112. Second ring part; 113. First stepped end face; 12. Second ring body; 1201. Second opening; 121. Third ring part; 122. Fourth ring part; 123. Second stepped end face;

[0031] 2. Cylinder block;

[0032] 3. Piston; 31. Embedded groove. Detailed Embodiment

[0033] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model are shown in the drawings, rather than all the structures.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment provides a sealing ring. Refer to Figures 1 to 4 As shown, the sealing ring includes at least two ring bodies. The at least two ring bodies are arranged in a fitting manner along the axial direction. Each ring body has an opening, and the opening is adapted to open when the ring body contracts due to cooling. Among the at least two ring bodies, the openings of every two adjacent ring bodies are arranged in a staggered manner.

[0038] In this embodiment, the sealing ring includes at least two ring bodies that are fitted together along the axial direction. Each ring body has an opening, and the opening is adapted to open when the ring body is affected by the external temperature change and contracts due to cooling. Among the at least two ring bodies, every two adjacent ring bodies are arranged with their openings staggered. When working under low-temperature conditions, even if the opening of each ring body of the sealing ring opens during the low-temperature shrinkage deformation, but the multiple openings are arranged in a staggered manner, the opening position of a single opening can be blocked by the adjacent ring body, so that no sealing leakage area will appear in the overall sealing ring, thus effectively ensuring the sealing effect.

[0039] In this embodiment, the sealing ring includes a first ring body 11 and a second ring body 12. The first ring body 11 has a first opening 1101, and the second ring body 12 has a second opening 1201. Among them, the first ring body 11 includes a first ring portion 111 and a second ring portion 112 with a stepped outer peripheral wall. The outer diameter of the first ring portion 111 is greater than that of the second ring portion 112. The second ring body 12 includes a third ring portion 121 and a fourth ring portion 122 with a stepped inner peripheral wall. The inner diameter of the third ring portion 121 is greater than that of the fourth ring portion 122. The second ring portion 112 is inserted into the third ring portion 121 and abuts against the fourth ring portion 122, and the third ring portion 121 abuts against the first ring portion 111.

[0040] Specifically, when the first annular body 11 is assembled with the second annular body 12, the second annular portion 112 is inserted into the third annular portion 121, the outer peripheral wall of the second annular portion 112 abuts against the inner peripheral wall of the third annular portion 121, the second annular portion 112 abuts against the fourth annular portion 122, and the first annular portion 111 abuts against the first annular portion 111. With such a setting, on the one hand, it can provide positioning for the installation between the first annular body 11 and the second annular body 12, avoiding axial deviation between the first annular body 11 and the second annular body 12. In addition, under this structural setting, after the first annular body 11 and the second annular body 12 are installed, the cross-section of the entire sealing ring is also a rectangular structure, having sufficient compressive capacity and being reliable and stable.

[0041] In this embodiment, the outer peripheral wall of the first annular portion 111 and the outer peripheral wall of the second annular portion 112 are connected by a first stepped end face 113, the inner peripheral wall of the third annular portion 121 and the inner peripheral wall of the fourth annular portion 122 are connected by a second stepped end face 123, the second annular portion 112 abuts against the second stepped end face 123, and the third annular portion 121 abuts against the first stepped end face 113. Specifically, the first stepped end face 113 can provide reliable abutting support for the third annular portion 121, and the second abutting end face can provide reliable abutting support for the second annular portion 112. In addition, after the first annular body 11 and the second annular body 12 are assembled, a Z-shaped joint structure can be formed between the first annular body 11 and the second annular body 12, and the joint being Z-shaped and zigzag can also effectively ensure the sealing performance.

[0042] In this embodiment, the outer diameter of the first annular portion 111 is equal to the outer diameter of the second annular body 12, and the inner diameter of the fourth annular portion 122 is equal to the inner diameter of the first annular body 11. With such a setting, after the first annular body 11 and the second annular body 12 are assembled into one body, the inner diameter and the outer diameter of the entire sealing ring can be kept consistent, with a simple structure and convenient processing.

[0043] In this embodiment, the misalignment angle between the first opening 1101 and the second opening 1201 is 180°. With such a setting, when the first annular body 11 and the second annular body 12 undergo low-temperature cold shrinkage deformation and the first opening 1101 and the second opening 1201 open, it can be avoided that the opening ranges overlap and cause the generation of a sealing leakage area.

[0044] This embodiment is not limited thereto. The misalignment angle between the first opening 1101 and the second opening 1201 can also be other angles such as 135° and 150°. As long as the misalignment setting can avoid the opening ranges of the first opening 1101 and the second opening 1201 overlapping when they open and generating a sealing leakage area.

[0045] It is worth mentioning that setting the ring body of the sealing ring 1 to two is only an optional implementation manner of the present utility model. In addition to setting the number of ring bodies to two, it can also be set to three, four or more, which will not be further limited herein.

[0046] In some optional implementation manners, when the number of ring bodies is three, the misalignment angle between the openings of every two adjacent ring bodies is preferably set to 120°. When the number of ring bodies is four, the misalignment angle between the openings of every two adjacent ring bodies is preferably set to 90°.

[0047] Optionally, the shape of the opening is set to I-shaped or Z-shaped. Specifically, when the shape of the opening is set to I-shaped, the advantage is that the opening is more firm and reliable, with high strength; when the shape of the opening is set to Z-shaped, the advantage is that when the ring body undergoes low-temperature shrinkage deformation and the opening expands, it can further avoid the generation of sealing leakage areas.

[0048] As an optional implementation manner, a plug (not shown) is provided on the first ring body 11, and a ring groove (not shown) is formed on the second ring body 12. The plug is inserted into the ring groove. Specifically, the plug is provided on the side of the first ring body 11 facing the second ring body 12, and a continuous annular ring groove is formed on the side of the second ring body 12 facing the first ring body 11. When the first ring body 11 and the second ring body 12 are assembled, the plug is inserted into the ring groove, and the side end faces of the first ring body 11 and the second ring body 12 facing each other are abutted.

[0049] Refer to Figure 5 As shown, this embodiment also provides a liquid pumping structure. The liquid pumping structure includes a cylinder block 2, a piston 3 and the above-mentioned sealing ring 1. Specifically, the cylinder block 2 has a working chamber, the piston 3 is telescopically arranged in the working chamber, and the above-mentioned sealing ring 1 is sleeved on the piston 3.

[0050] Specifically, when the above-mentioned sealing ring 1 is used on the liquid pumping structure, at normal temperature, the opening of the sealing ring 1 is approximately in a closed state. When the liquid pumping structure works under low-temperature conditions, each ring body of the sealing ring 1 expands when undergoing low-temperature shrinkage deformation, and multiple openings are misaligned. The opening position of a single opening can be blocked by adjacent ring bodies, so that no sealing leakage area will appear in the sealing ring 1 as a whole, effectively ensuring the sealing effect between the cylinder block 2 and the piston 3. When the piston 3 reciprocates, a lower leakage rate is maintained, thereby ensuring a higher pump suction efficiency.

[0051] Specifically, an embedding groove 31 is formed on the piston 3, 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. Specifically, the inner diameter of the first ring body 11 is equal to the outer diameter of the fourth ring part 122, that is, the inner diameter of the whole sealing ring remains consistent, which can also effectively reduce the processing difficulty of the embedding groove 31.

[0052] Optionally, the number of the sealing rings 1 is set to be plural, and the plural sealing rings 1 are sleeved on the piston 3 at intervals. The arrangement of the plural sealing rings 1 further ensures reliable sealing between the cylinder block 2 and the piston 3.

[0053] In this embodiment, the sealing rings 1 generally use a ultra-high molecular material with a relatively large coefficient of linear expansion. Exemplarily, the material of the sealing rings 1 is set to be ultra-high molecular weight polyethylene material. Ultra-high molecular weight polyethylene (UHMW-PE) is a thermoplastic engineering plastic with a linear structure and excellent comprehensive properties, having super wear resistance, self-lubrication, relatively high strength, stable chemical properties and strong anti-aging performance.

[0054] In summary, the sealing ring 1 provided in this embodiment has a simple structure, can effectively ensure the sealing effect, avoid the generation of sealing leakage areas due to low-temperature cold shrinkage deformation, and can effectively ensure the pump suction efficiency when used in a liquid pumping structure.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A sealing ring, characterized in that, It includes at least two ring bodies, at least two of the ring bodies are arranged in contact along the axial direction, each of the ring bodies has an opening, the opening is adapted to open when the ring body contracts due to cold, and among at least two of the ring bodies, the openings of every two adjacent ring bodies are arranged in a staggered manner.

2. The sealing ring according to claim 1, characterized in that, It includes a first ring body (11) and a second ring body (12), the first ring body (11) has a first opening (1101), and the second ring body (12) has a second opening (1201); wherein, The first ring body (11) includes a first ring portion (111) and a second ring portion (112) whose outer peripheral walls are arranged in a stepped manner, the outer diameter of the first ring portion (111) is larger than the outer diameter of the second ring portion (112); the second ring body (12) includes a third ring portion (121) and a fourth ring portion (122) whose inner peripheral walls are arranged in a stepped manner, the inner diameter of the third ring portion (121) is larger than the inner diameter of the fourth ring portion (122); The second ring portion (112) is inserted into the third ring portion (121) and abuts against the fourth ring portion (122), and the third ring portion (121) abuts against the first ring portion (111).

3. The sealing ring according to claim 2, characterized in that, The outer peripheral wall of the first ring portion (111) and the outer peripheral wall of the second ring portion (112) are connected by a first stepped end face (113), the inner peripheral wall of the third ring portion (121) and the inner peripheral wall of the fourth ring portion (122) are connected by a second stepped end face (123), the second ring portion (112) abuts against the second stepped end face (123), and the third ring portion (121) abuts against the first stepped end face (113).

4. The sealing ring according to claim 2, characterized in that, The outer diameter of the first ring portion (111) is equal to the outer diameter of the second ring body (12), and the inner diameter of the fourth ring portion (122) is equal to the inner diameter of the first ring body (11).

5. The sealing ring according to claim 1, characterized in that, It includes a first ring body (11) and a second ring body (12), the first ring body (11) has a first opening (1101), and the second ring body (12) has a second opening (1201); wherein, A plug is provided on the first ring body (11), and a ring groove is formed on the second ring body (12), and the plug is inserted into the ring groove.

6. The sealing ring according to claim 2 or 5, characterized in that, The misalignment angle between the first opening (1101) and the second opening (1201) is 180°.

7. The sealing ring according to claim 1, characterized in that, The shape of the opening is set to be I-shaped or Z-shaped.

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

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

10. The liquid pumping structure according to claim 8, wherein, A slot (31) is formed on the piston (3), and the sealing ring (1) is sleeved on the slot (31).

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