Sealing device between box body and shaft

Abstract

The utility model discloses a sealing device between a box body and a shaft, which comprises the box body, a sealing seat is arranged at the top of the box body, the box body and the sealing seat are sealed by an O-shaped ring, a drainage ring is arranged on the sealing seat, and the drainage ring is used for enabling a small part of liquid flowing out of the box body to return to the box body or be independently discharged. A sealing seat is arranged in the box body, a sealing cover is arranged on the sealing seat, a rotary seal is arranged in the sealing cover, a central shaft is arranged at the center of the sealing seat and the sealing cover, the central shaft is used for isolating an inner cavity of the box body from the outside, and the rotary seal is arranged between the central shaft and the sealing cover. According to the utility model, the purpose that the liquid in the box body flows out and the outside liquid or impurities cannot enter the box body is achieved through the rotary sealing structure.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical seals, in particular to a sealing device between a box body and a shaft. Background Art

[0002] Sealing between housings and shafts has always been a significant technical challenge in mechanical engineering. Existing sealing devices are often complex, difficult to maintain, and costly, making them unable to meet increasingly stringent operating requirements. Furthermore, traditional sealing methods are prone to failure after prolonged use, allowing liquids or impurities inside and outside the housing to penetrate each other, seriously impacting the normal operation of the mechanical equipment.

[0003] The rotary seal structure is a common sealing structure in various types of equipment. This device was developed to better solve the sealing problem between the box and the shaft, to solve the problem of liquid leakage during equipment design and operation, and to better serve production. Utility Model Content

[0004] The present application provides a sealing device between a box body and a shaft, which realizes the purpose of allowing liquid in the box body to flow outward and preventing external liquid or impurities from entering the box body through a rotating sealing structure.

[0005] The present application provides a sealing device between a box and a shaft, which adopts the following technical solution:

[0006] A sealing device between a box body and a shaft comprises a box body, a sealing seat is provided on the top of the box body, the box body and the sealing seat are sealed with an O-ring, a leakage ring is provided on the sealing seat, the leakage ring is used to allow a small amount of liquid flowing out of the box body to return to the box body or be discharged separately, a sealing cover is provided on the sealing seat, a rotary seal is installed in the sealing cover, a central shaft is provided at the center of the sealing seat and the sealing cover, the central shaft is used to isolate the inner cavity of the box body from the outside world, and the rotary seal is provided between the central shaft and the sealing cover.

[0007] By adopting the above technical scheme, the utility model designs a sealing device between a box body and a shaft. When in use, a sealing seat and a sealing cover are installed on the top of the box body. The sealing seat and the box body are sealed by an O-ring to ensure that the liquid in the box body will not leak out. After the sealing seat and the sealing cover are connected, the space between them is used to connect the central shaft. A rotary seal is installed on the sealing cover. The box body is further sealed by utilizing the sealed connection between the rotary seal and the central shaft. At the same time, a leakage ring is also provided on the sealing seat. The leakage ring can return part of the outflowing liquid flow into the box body. Therefore, through the design of the above structure, the purpose of allowing the liquid in the box body to flow out and preventing the liquid or impurities outside from entering the box body is achieved.

[0008] Preferably, the sealing seat and the sealing cover are fixed to the top of the box body by screws.

[0009] By adopting the above technical solution, in order to ensure that the sealing seat and the sealing cover can be stably arranged on the top of the box body during use, the box body, the sealing seat and the sealing cover are fixed by screws.

[0010] Preferably, the box body and the sealing seat are provided with a sealing groove, the O-ring is made of elastic material, and the O-ring is filled in the sealing groove.

[0011] By adopting the above technical solution, when in use, a sealing groove is opened in the box body and the sealing seat. Since the O-ring is made of elastic material, the O-ring can be filled in the sealing groove for sealing.

[0012] Preferably, the rotary seal includes a dynamic sealing surface in contact with the central shaft and a static sealing surface in contact with the sealing seat or the sealing cover.

[0013] By adopting the above technical solution, when in use, the surface of the rotary seal in contact with the central shaft can be dynamically sealed along with the central shaft, while the surface in contact with the sealing cover maintains static sealing.

[0014] Preferably, the leakage ring is arranged on the outside of the rotary seal to guide and recover a small amount of liquid flowing out of the box body. The leakage ring is provided with a reflux channel so that the flowing liquid can return to the box body or be discharged separately.

[0015] By adopting the above technical solution, when in use, the reflux channel provided on the leakage ring allows the overflowed liquid to reflux, and at the same time, this channel can also prevent the internal liquid from flowing to the outside.

[0016] Preferably, the sealing cover and the rotary seal are detachably connected by snapping, and the portion where the sealing cover and the rotary seal are in contact is sealed to ensure the sealing performance.

[0017] By adopting the above technical solution, when in use, the sealing cover is snap-connected with the rotary seal. This connection method makes it easy to disassemble the rotary seal for maintenance. At the same time, after the snap-connection, the joint between the sealing cover and the rotary seal is sealed by filling materials or the like.

[0018] Preferably, the sealing seat and the sealing cover are made of corrosion-resistant materials to adapt to various working environments.

[0019] By adopting the above technical solution, in order to increase the service life of the sealing seat and the sealing cover during use, the sealing seat and the sealing cover are both made of corrosion-resistant materials during manufacturing.

[0020] Preferably, the contact surface between the central shaft and the rotary seal is treated to reduce friction and wear and extend the service life of the sealing device.

[0021] By adopting the above technical solution, when in use, the contact surface between the shaft and the rotary seal is subjected to anti-skid treatment, so that the friction between the two is reduced and the service life thereof is increased.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. This utility model designs a sealing device between a box and a shaft, which adopts a rotary sealing structure, including a dynamic sealing surface and a static sealing surface, achieving a dynamic and static dual sealing effect, greatly improving the sealing performance. At the same time, an O-ring is used to seal between the sealing seat and the box, further improving the sealing effect.

[0024] 2. The utility model is designed to provide a sealing device between a housing and a shaft. By arranging a leakage ring on the outside of the rotary seal, a small amount of overflowed liquid is refluxed through the reflux channel on the leakage ring.

[0025] 3. The sealing device between the box body and the shaft designed in the present invention preferably adopts a sealing seat and a sealing cover made of corrosion-resistant materials, and a specially treated shaft and rotary seal contact surface, which reduces friction and wear and extends the service life of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of an embodiment;

[0027] Figure 2 A schematic structural diagram showing a leakage ring in an embodiment;

[0028] Explanation of the accompanying reference numerals: 1. Box body; 2. Sealing seat; 3. O-ring; 4. Leakage ring; 5. Sealing cover; 6. Rotary seal; 7. Center shaft; 8. Screw; 9. Sealing groove; 10. Return channel. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0030] The utility model discloses a sealing device between a box body and a shaft, such as Figure 1 and Figure 2As shown, the housing 1 comprises a sealing member 2 disposed at the top of the housing 1. An O-ring 3 seals the housing 1 and the sealing member 2. The O-ring 3 is made of an elastic material and is inserted into a specially provided sealing groove 9 on the housing 1 and the sealing member 2. A sealing cover 5 is also disposed on the sealing member 2. The sealing cover 5 and the sealing member 2 are securely fastened to the top of the housing 1 by screws 8. The sealing member 2 and the sealing cover 5 are constructed from corrosion-resistant materials that are adaptable to a variety of operating environments, particularly those with high corrosion potential, thereby significantly extending the service life of the sealing device. A rotary seal 6 is mounted within the sealing cover 5. The rotary seal 6 comprises a dynamic sealing surface that contacts the shaft and a static sealing surface that contacts the sealing member 2 or the sealing cover 5. This design ensures a good seal whether the shaft is rotating or stationary. The rotary seal 6 and the sealing cover 5 are detachably connected via a snap-fit ​​mechanism. To ensure a tight seal, the portion of the sealing cover 5 that meets the rotary seal 6 is specially sealed.

[0031] A central shaft 7 is located between the sealing seat 2 and the sealing cover 5. A rotary seal 6 includes a dynamic sealing surface that contacts the shaft and a static sealing surface that contacts the sealing seat 2 or the sealing cover 5. Central shaft 7 is used to isolate the interior of housing 1 from the outside world. Rotary seal 6 is located between central shaft 7 and the sealing cover 5. The contact surface between the shaft and rotary seal 6 has been treated to reduce friction and wear, thereby extending the service life of the seal.

[0032] The sealing seat 2 is provided with a drain ring 4, which is equipped with a dedicated return channel 10. This return channel 10 can guide the collected liquid back into the interior of the box 1 or discharge it separately. This design provides a more flexible liquid handling method that can be adjusted and optimized according to specific application requirements. The main function of the drain ring 4 is to guide and recover a small amount of liquid that flows out of the box 1. This design not only prevents liquid leakage from polluting the external environment, but also allows this liquid to be recovered and reused, thereby improving resource utilization efficiency.

[0033] This solution emphasizes the collaborative relationship between various components, including the O-ring 3, seal seat 2, seal cover 5, rotary seal 6, and drain ring 4. These components work together to form a complete sealing system, ensuring a strong seal between the housing 1 and the central shaft 7 under various operating conditions. The materials and structures of each component in this device have been carefully designed to adapt to different operating conditions such as temperature, pressure, and corrosive environments. This wide adaptability enables the sealing device to perform excellently in a variety of complex application scenarios.

[0034] Working Principle: This utility model designs a sealing device between a housing and a shaft. Static sealing is achieved between housing 1 and sealing seat 2 using an elastic O-ring. Dynamic sealing is achieved through a rotary seal 6. As the shaft rotates, the dynamic sealing surface of rotary seal 6 closely contacts the shaft, forming an effective seal. Furthermore, the tight fit between sealing cover 5 and sealing seat 2 further enhances the overall sealing effect.

[0035] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A sealing device between a box and a shaft, characterized in that: The invention comprises a box body (1), a sealing seat (2) is provided on the top of the box body (1), the box body (1) and the sealing seat (2) are sealed by an O-ring (3), a leakage ring (4) is provided on the sealing seat (2), and the leakage ring (4) is used to allow a small portion of liquid flowing out of the box body (1) to return to the box body (1) or be discharged separately, a sealing cover (5) is provided on the sealing seat (2), a rotary seal (6) is installed in the sealing cover (5), a central shaft (7) is provided at the center of the sealing seat (2) and the sealing cover (5), and the central shaft (7) is used to isolate the inner cavity of the box body (1) from the outside, and the rotary seal (6) is provided between the central shaft (7) and the sealing cover (5).

2. The sealing device between a box and a shaft according to claim 1, characterized in that: The sealing seat (2) and the sealing cover (5) are fixed to the top of the box body (1) by screws (8).

3. The sealing device between a box and a shaft according to claim 1, characterized in that: The box body (1) and the sealing seat (2) are provided with a sealing groove (9); the O-ring (3) is made of elastic material; and the O-ring (3) is filled in the sealing groove (9).

4. The sealing device between a box and a shaft according to claim 1, characterized in that: The rotary seal (6) comprises a dynamic sealing surface in contact with the central shaft (7) and a static sealing surface in contact with the sealing seat (2) or the sealing cover (5).

5. The sealing device between a box and a shaft according to claim 1, characterized in that: The leakage ring (4) is arranged on the outside of the rotary seal (6) and is used to guide and recover a small amount of liquid flowing out of the box (1). The leakage ring (4) is provided with a reflux channel (10) so that the flowing liquid can return to the box (1) or be discharged separately.

6. The sealing device between a box and a shaft according to claim 1, characterized in that: The sealing cover (5) and the rotary seal (6) are detachably connected by means of a snap connection, and the portion where the sealing cover (5) and the rotary seal (6) are in contact with each other is sealed to ensure the sealing performance.

7. The sealing device between a box and a shaft according to claim 1, characterized in that: The sealing seat (2) and the sealing cover (5) are made of corrosion-resistant materials to adapt to various working environments.

8. The sealing device between a box and a shaft according to claim 1, characterized in that: The contact surface between the central shaft (7) and the rotary seal (6) is treated to reduce friction and wear and extend the service life of the sealing device.

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