Lateral airtight joint for positive and negative rotation of rotating shaft

Abstract

The utility model provides a lateral airtight joint for positive and negative rotation of a rotating shaft. The lateral airtight joint comprises the rotating shaft, a sealing cylinder, a first sealing ring, a second sealing ring and an inner bracket, the rotating shaft penetrates through the sealing cylinder; the first sealing ring, the inner support and the second sealing ring are all located on the inner side of the sealing cylinder and sequentially stacked and arranged on the rotating shaft in a penetrating mode from top to bottom. A first channel is formed in the upper end of the rotating shaft in the axial direction, a first through hole is further formed in the side wall of the rotating shaft, and the first through hole is communicated with the first channel; the inner support is arranged on the outer side of the first through hole, and a first strip-shaped groove and a second strip-shaped groove are further formed in the side wall of the inner support. A first butt joint and a second butt joint are symmetrically arranged on the outer wall of the sealing cylinder; a second channel and a third channel are correspondingly arranged. The lateral airtight joint of the rotating shaft effectively solves the problems of poor sealing performance, non-uniform fluid distribution, high assembly complexity, inconvenience in operation and the like in the prior art, and improves the overall performance and the use experience of a product.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating shafts, and particularly relates to a positive and negative rotation side airtight joint for a rotating shaft. Background Art

[0002] Traditional side airtight joints for rotating shafts are widely used in various mechanical devices to ensure stable input or output of fluids (such as gases or liquids) without leakage during the movement of the rotating shaft; such joints usually include a rotating shaft, a sealing cylinder fixed externally, and some auxiliary structures to ensure the sealing effect; however, in actual applications, such joints often have some problems, especially poor sealing performance under high-speed rotation and high-pressure working conditions, and leakage is likely to occur.

[0003] Deficiencies of the Prior Art

[0004] 1. The contact pressure distribution between the sealing ring and the rotating shaft is uneven. Especially under high-speed rotation, it may lead to increased local wear and affect the overall sealing effect.

[0005] 2. Low fluid transportation efficiency:

[0006] The fluid transportation path in the traditional design is complex, and the fluid may encounter resistance when passing through, thus reducing the transportation efficiency;

[0007] Lack of an effective fluid guiding structure makes the flow of the fluid inside the rotating shaft unstable, affecting the uniform distribution of the fluid.

[0008] 3. High assembly complexity:

[0009] In the prior art, in order to achieve a good sealing effect, complex assembly processes and more components are required, increasing the manufacturing cost and maintenance difficulty;

[0010] The matching accuracy requirements between components are high, posing high requirements for the processing and assembly processes.

[0011] Therefore, the prior art has deficiencies and needs further improvement. Summary of the Utility Model

[0012] Aiming at the problems existing in the prior art, the utility model provides a positive and negative rotation side airtight joint for a rotating shaft.

[0013] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0014] The utility model provides a positive and negative rotation side airtight joint for a rotating shaft, comprising:

[0015] A rotating shaft, a sealing cylinder, a first sealing ring, a second sealing ring, and an inner support;

[0016] The rotating shaft is arranged through the sealing cylinder;

[0017] The first sealing ring, the inner support, and the second sealing ring are all located inside the sealing cylinder and are stacked on the rotating shaft in sequence from top to bottom;

[0018] An axial first channel is arranged at the upper end of the rotating shaft, and a first through hole is also arranged on the side wall of the rotating shaft, and the first through hole is communicated with the first channel;

[0019] The inner support is arranged outside the first through hole, and a first strip-shaped groove and a second strip-shaped groove are also arranged on the side wall of the inner support, and the first strip-shaped groove and the second strip-shaped groove are centrosymmetric about the center of the rotating shaft;

[0020] A first docking head and a second docking head are symmetrically arranged on the outer wall of the sealing cylinder;

[0021] A second channel is arranged in the first docking head, and a third channel is arranged in the second docking head;

[0022] The first sealing ring and the second sealing ring are used to achieve rotary sealing between the rotating shaft and the sealing cylinder;

[0023] The first channel is used for gas or liquid medium to enter. During the rotation of the rotating shaft, it enters the first strip-shaped groove or the second strip-shaped groove of the inner support through the first through hole, and then enters the second channel and the third channel.

[0024] Further, a cylinder cover is arranged at the lower end of the sealing cylinder, and the lower end of the rotating shaft passes through the middle of the cylinder cover.

[0025] Further, a first retaining ring is arranged on the inner side of the upper end of the sealing cylinder, and a second retaining ring is arranged on the rotating shaft, and the second retaining ring is located above the first retaining ring.

[0026] Further, a first annular groove is arranged on the outer side of the upper end of the rotating shaft.

[0027] Further, a second annular groove is arranged on the outer side of the front end of the first docking head, and a third annular groove is also arranged on the outer side of the front end of the second docking head.

[0028] Further, the first strip-shaped groove and the second strip-shaped groove are spirally arranged clockwise along the side wall of the inner support.

[0029] Further, a cross-shaped groove is arranged at the lower end of the rotating shaft.

[0030] Further, a fourth annular groove is respectively arranged on both sides of the first sealing ring and the second sealing ring.

[0031] Furthermore, integral oil grooves are provided on the inner sides of the first sealing ring and the second sealing ring for lubrication to reduce friction and enhance sealing.

[0032] Adopting the technical solution of the present utility model has the following beneficial effects:

[0033] 1. The sealing performance is improved:

[0034] By providing the first sealing ring and the second sealing ring, and providing the fourth annular groove on both sides of the sealing ring, the contact tightness between the sealing ring and the rotating shaft and the sealing cylinder is enhanced, thereby improving the sealing performance of the entire device and reducing the possibility of fluid leakage.

[0035] 2. The fluid distribution is optimized:

[0036] The first strip groove and the second strip groove are arranged in a clockwise spiral, effectively guiding the fluid medium to be evenly distributed to the second channel and the third channel during the rotation of the rotating shaft, improving the efficiency and stability of fluid transportation.

[0037] 3. The assembly process is simplified:

[0038] By providing a cylinder cover at the lower end of the sealing cylinder, it is convenient for the positioning and assembly of the rotating shaft, simplifying the installation and disassembly process of the entire device and reducing the maintenance cost.

[0039] 4. The structural stability is enhanced:

[0040] The first retaining ring provided on the inner side of the upper end of the sealing cylinder cooperates with the second retaining ring on the rotating shaft, providing additional support for the rotating shaft and helping to reduce wear caused by vibration generated during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a perspective view of the present utility model;

[0042] Figure 2 is a perspective view of another angle of the present utility model;

[0043] Figure 3 is an exploded view of the present utility model;

[0044] Figure 4 is a cross-sectional view of the present utility model.

[0045] In the figure:

[0046] 1. Rotating shaft; 2. Sealing cylinder; 3. First sealing ring; 4. Second sealing ring; 5. Inner support; 6. Cylinder cover;

[0047] 7. First channel; 8. First through hole;

[0048] 9. First strip groove; 10. Second strip groove;

[0049] 11. First docking head; 12. Second docking head;

[0050] 13. Second channel; 14. Third channel;

[0051] 15. First retaining ring; 16. Second retaining ring;

[0052] 17. First annular groove; 18. Second annular groove; 19. Third annular groove;

[0053] 20. One - shaped groove;

[0054] 21. Fourth annular groove; 22. Oil groove. Detailed implementation mode

[0055] The following combines the attached drawings and embodiments to further elaborate on the present utility model. 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. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all structures are shown in the attached drawings.

[0056] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", 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 connection 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.

[0057] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the", and "under the" second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0058] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operations, rather than indicating or implying that the device or component 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.

[0059] Combined with Figures 1 - 4 as shown, the present utility model provides a positive and reverse rotation lateral airtight joint for a rotating shaft, including:

[0060] a rotating shaft 1, a sealing cylinder 2, a first sealing ring 3, a second sealing ring 4, and an inner bracket 5;

[0061] The rotating shaft 1 is arranged in the sealing cylinder 2;

[0062] The first sealing ring 3, the inner bracket 5, and the second sealing ring 4 are all located inside the sealing cylinder 2 and are stacked in sequence from top to bottom and sleeved on the rotating shaft 1;

[0063] An axial first channel 7 is arranged at the upper end of the rotating shaft 1, and a first through hole 8 is also arranged on the side wall of the rotating shaft 1. The first through hole 8 communicates with the first channel 7;

[0064] The inner bracket 5 is arranged outside the first through hole 8. A first strip-shaped groove 9 and a second strip-shaped groove 10 are also arranged on the side wall of the inner bracket 5. The first strip-shaped groove 9 and the second strip-shaped groove 10 are centrosymmetric about the center of the rotating shaft 1;

[0065] First docking heads 11 and second docking heads 12 are symmetrically arranged on the outer wall of the sealing cylinder 2;

[0066] A second channel 13 is arranged in the first docking head 11, and a third channel 14 is arranged in the second docking head 12;

[0067] The first sealing ring 3 and the second sealing ring 4 are used to achieve rotational sealing between the rotating shaft 1 and the sealing cylinder 2;

[0068] The first channel 7 is used for gas or liquid medium to enter. During the rotation of the rotating shaft 1, it enters the first strip-shaped groove 9 or the second strip-shaped groove 10 of the inner bracket 5 through the first through hole 8, and then enters the second channel 13 and the third channel 14.

[0069] A cylinder cover 6 is also arranged at the lower end of the sealing cylinder 2, and the lower end of the rotating shaft 1 passes through the middle of the cylinder cover 6.

[0070] On the inner side of the upper end of the sealing cylinder 2, a first retaining ring 15 is further provided. On the rotating shaft 1, a second retaining ring 16 is provided, and the second retaining ring 16 is located above the first retaining ring 15.

[0071] On the outer side of the upper end of the rotating shaft 1, a first annular groove 17 is further provided.

[0072] On the outer side of the front end of the first docking head 11, a second annular groove 18 is provided. On the outer side of the front end of the second docking head 12, a third annular groove 19 is further provided.

[0073] The first strip-shaped groove 9 and the second strip-shaped groove 10 are spirally arranged clockwise along the side wall of the inner support 5.

[0074] At the lower end of the rotating shaft 1, a flat groove 20 is further provided.

[0075] On both sides of the first sealing ring 3 and the second sealing ring 4, a fourth annular groove 21 is respectively provided.

[0076] On the inner sides of the first sealing ring 3 and the second sealing ring 4, a whole-circle oil groove 22 is provided for lubrication to reduce friction and enhance sealing.

[0077] The principle of the present utility model is as follows:

[0078] Structural composition:

[0079] Rotating shaft 1: Passed through the sealing cylinder 2, with a first channel 7 provided at the upper end and a first through hole 8 communicating with the first channel 7 provided on the side wall.

[0080] Sealing cylinder 2: A fixed structure for accommodating the rotating shaft 1, and additional structures (cylinder cover 6 and retaining ring) are provided at its upper and lower ends.

[0081] First sealing ring 3 and second sealing ring 4: Located inside the sealing cylinder 2, stacked on the rotating shaft 1 from top to bottom in sequence, for realizing the rotary seal between the rotating shaft 1 and the sealing cylinder 2.

[0082] Inner support 5: Located between the first sealing ring 3 and the second sealing ring 4, and two symmetric strip-shaped grooves (first strip-shaped groove 9 and second strip-shaped groove 10) are provided on its side wall, and these two strip-shaped grooves are spirally arranged clockwise.

[0083] First docking head 11 and second docking head 12: Symmetrically arranged on the outer wall of the rotating shaft 1, and a second channel 13 and a third channel 14 are respectively provided therein for leading out gaseous or liquid media.

[0084] Working process

[0085] Medium entry:

[0086] The fluid (gas or liquid) enters through the first channel 7 at the upper end of the rotating shaft 1.

[0087] The medium enters through the first through-hole 8 on the side wall of the rotating shaft 1 into the first strip-shaped groove 9 or the second strip-shaped groove 10 of the inner support 5.

[0088] Medium distribution:

[0089] During the rotation of the rotating shaft 1, the medium is guided by the spiral shapes of the first strip-shaped groove 9 and the second strip-shaped groove 10 and moves along the radial direction of the rotating shaft 1.

[0090] Subsequently, the medium is distributed through the first strip-shaped groove 9 or the second strip-shaped groove 10 of the inner support 5 into the second channel 13 of the first docking head 11 and the third channel 14 of the second docking head 12.

[0091] Rotary seal:

[0092] The first sealing ring 3 and the second sealing ring 4 ensure the sealing between the rotating shaft 1 and the sealing cylinder 2, and can maintain a good sealing effect even under high-speed rotation.

[0093] Support structure:

[0094] The cover 6 at the lower end of the sealing cylinder 2 provides support and positioning for the lower end of the rotating shaft 1.

[0095] A first retaining ring 15 is provided on the inner side of the upper end of the sealing cylinder 2, and a second retaining ring 16 is provided on the rotating shaft 1. The two work together to prevent the excessive movement of the rotating shaft 1 and increase the structural stability.

[0096] Function of the annular groove:

[0097] A first annular groove 17 is provided on the outer side of the upper end of the rotating shaft 1 for installing fasteners or seals.

[0098] Second annular grooves 18 and third annular grooves 19 are respectively provided on the outer sides of the front ends of the first docking head 11 and the second docking head 12, which are also used for installing fasteners or seals to ensure the sealing at the connection.

[0099] Operational convenience:

[0100] The straight slot 20 at the lower end of the rotating shaft 1 can be used for the operation of tools, facilitating the installation and removal of the rotating shaft 1.

[0101] Enhanced sealing:

[0102] Fourth annular grooves 21 provided on both sides of the first sealing ring 3 and the second sealing ring 4 further enhance the sealing effect, or install a coupling to achieve power input.

[0103] In summary, the lateral airtight joint of the rotating shaft 1 of the present utility model realizes the effective distribution and sealing of fluid media through a unique structural design, can maintain good sealing performance while the rotating shaft 1 rotates at high speed, and is applicable to various industrial application scenarios.

[0104] The above are only the preferred embodiments of the present utility model, and do not limit the scope of the utility model of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or direct or indirect application in other related technical fields, are all included in the protection scope of the present utility model.

Claims

1. A positive and negative rotation side airtight joint for a rotating shaft, characterized in that, Comprising: A rotating shaft, a sealing cylinder, a first sealing ring, a second sealing ring, and an inner bracket; The rotating shaft is arranged inside the sealing cylinder; The first sealing ring, the inner bracket, and the second sealing ring are all located inside the sealing cylinder and are stacked on the rotating shaft in sequence from top to bottom; At the upper end of the rotating shaft, a first channel is axially arranged, and a first through hole is also arranged on the side wall of the rotating shaft, and the first through hole communicates with the first channel; The inner bracket is arranged outside the first through hole, and a first strip-shaped groove and a second strip-shaped groove are also arranged on the side wall of the inner bracket, and the first strip-shaped groove and the second strip-shaped groove are centrosymmetric with respect to the center of the rotating shaft; On the outer wall of the sealing cylinder, a first docking head and a second docking head are symmetrically arranged; A second channel is arranged in the first docking head, and a third channel is arranged in the second docking head; The first sealing ring and the second sealing ring are used to achieve rotary sealing between the rotating shaft and the sealing cylinder; The first channel is used for gas or liquid medium to enter. During the rotation of the rotating shaft, it enters the first strip-shaped groove or the second strip-shaped groove of the inner bracket through the first through hole, and then enters the second channel and the third channel.

2. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A cylinder cover is further arranged at the lower end of the sealing cylinder, and the lower end of the rotating shaft passes through the middle of the cylinder cover.

3. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A first retaining ring is further arranged inside the upper end of the sealing cylinder, and a second retaining ring is arranged on the rotating shaft, and the second retaining ring is located above the first retaining ring.

4. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A first annular groove is further arranged outside the upper end of the rotating shaft.

5. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A second annular groove is arranged outside the front end of the first docking head, and a third annular groove is further arranged outside the front end of the second docking head.

6. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that The first strip-shaped groove and the second strip-shaped groove are spirally arranged clockwise along the side wall of the inner bracket.

7. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A cross-shaped groove is further arranged at the lower end of the rotating shaft.

8. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that A fourth annular groove is respectively arranged on both sides of the first sealing ring and the second sealing ring.

9. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that The materials of the sealing cylinder, the inner bracket, and the cylinder cover are ABS, and the materials of the first sealing ring and the second sealing ring are silica gel.

10. The rotating shaft forward and reverse side airtight joint according to claim 1, characterized in that Integral oil grooves are arranged on the inner sides of the first sealing ring and the second sealing ring for lubrication to reduce friction and enhance sealing.

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