A seal device of external circulation oil return type

Abstract

The utility model discloses a kind of external circulation oil return type sealing devices, comprising: sealing static ring, the sealing static ring is multiple arc static ring cover body, multiple arc static ring fixed flange and multiple static ring oil collecting groove composition, its static ring fixed flange is set in equipment cabinet or cover body end face, the equipment cabinet is far from the side of sealing static ring as sealing medium;Oil return pipe, set in the bottom of sealing static ring, and oil return pipe is communicated with equipment lubrication system, oil return pipe is used to guide flow lubricating medium in sealing static ring cavity to equipment lubrication system;Sealing dynamic ring, set on rotating shaft, and sealing dynamic ring is set in the inside of sealing static ring, the sealing dynamic ring is used to block lubricating medium and be thrown to the inner wall of static ring cover body on it.This utility model realizes online external installation, without changing original equipment structure, easy to install, no wear, long service life, easy to disassemble and maintain, by internal circulation flow guiding lubrication design, realize preventing lubricating medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology, and in particular to an external circulating oil return sealing device. Background Technology

[0002] A seal is an industrial equipment component used to prevent the leakage of fluids or solid particles or the intrusion of external impurities into mechanical mating surfaces. This device consists of core components such as a rotating ring and a stationary ring. Assembly must ensure that the sealing surfaces are undamaged and kept clean.

[0003] Currently, many large industrial and mining enterprises have large transmission equipment operating online that suffers from leaks. These equipment often use contact seals, which are prone to wear and tear during long-term operation and require regular replacement. However, this method has the following drawbacks: in order to ensure the completion of predetermined production tasks and goals, the equipment will not be shut down for seal replacement. Instead, replacement and maintenance will be carried out during specific maintenance periods. During this period, the equipment will continue to leak oil, posing a threat to the production environment and equipment safety, and also causing oil waste and increasing production costs. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned shortcomings by providing an external circulating oil return sealing device that enables online external installation without altering the original equipment structure. It is easy to install, wear-free, has a long service life, and is convenient to disassemble and maintain. Through its internal circulating lubrication design, it prevents leakage of the lubricating medium.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an external circulating oil return sealing device, comprising:

[0006] The sealing stationary ring is composed of a multi-segment arc-shaped stationary ring cover, a multi-segment arc-shaped stationary ring fixing flange, and a multi-segment stationary ring oil collection groove. The stationary ring fixing flange is located on the end face of the equipment housing or cover. The sealing medium is located on the side of the equipment housing away from the sealing stationary ring.

[0007] The return oil pipe is located at the bottom of the sealing stationary ring and is connected to the equipment lubrication system. The return oil pipe is used to guide the lubricating medium in the sealing stationary ring cavity back to the equipment lubrication system.

[0008] A rotating shaft is located inside a sealing stationary ring, and a roller is provided on the rotating shaft for connecting to the equipment housing;

[0009] The oil return port is located on the equipment cover near the inner bottom wall of the stationary ring cover. The oil return port is used to guide the lubricating medium in the sealed stationary ring cavity back into the equipment cover.

[0010] A sealing rotating ring is disposed on a rotating shaft and inside a sealing stationary ring. The sealing rotating ring has a split structure, and may be at least a single split or formed by splicing multiple segments. It is formed and fixed by locking hose clamps or welding. The sealing rotating ring is located away from the axial surface of the rotating shaft. The sealing rotating ring is an oil-blocking ring or an oil-throwing ring. The sealing rotating ring has at least one oil-blocking tooth and is provided with oil-blocking teeth. The sealing rotating ring is used to block the lubricating medium and throw it off the inner wall of the stationary ring cover.

[0011] The stationary ring oil collection groove is located on the inner wall of the sealing stationary ring cavity, adjacent to the stationary ring dust seal. The stationary ring oil collection groove is used to collect the lubricating medium that was thrown off the sealing moving ring onto the inner wall of the stationary ring cover, and guide it to the bottom of the sealing stationary ring cavity. Then, it returns to the lubrication system for circulation lubrication through the return oil pipe or return oil port.

[0012] Furthermore, the sealing stationary ring includes a stationary ring mating flange for connecting the multi-segment arc-shaped stationary ring cover;

[0013] It also includes a stationary ring dustproof ring disposed on the stationary ring cover, and the stationary ring dustproof ring is in contact with the axial surface of the rotating shaft;

[0014] It also includes a pressure ring set on the outside of the stationary ring dustproof ring, which is used to fix and press the stationary ring dustproof ring onto the stationary ring cover. The pressure ring and the stationary ring cover are fixedly installed by bolts.

[0015] Furthermore, the sealing ring is a split structure, which may be at least a single split or formed by splicing multiple segments. It is formed and fixed by locking hose clamps or welding. The sealing ring is located away from the axial surface of the rotating shaft, and the longitudinal section of the sealing ring is a C-shape symmetrical about the axis of rotation.

[0016] Furthermore, the equipment cover near the inner bottom wall of the stationary ring cover is provided with an oil return port, which is used to guide the lubricating medium in the sealed stationary ring cavity back into the equipment cover.

[0017] Furthermore, the longitudinal section of the stationary ring oil collection groove is L-shaped, and the stationary ring oil collection groove is circular in shape. The stationary ring oil collection groove is located on the inner wall of the sealed stationary ring cavity, adjacent to the dustproof ring side of the stationary ring. The stationary ring oil collection groove is used to collect the lubricating medium that is thrown off the sealing moving ring onto the inner wall of the stationary ring cover, and guide it to the bottom of the sealed stationary ring cavity. Through the return oil pipe or return oil port, it returns to the lubrication system for circulating lubrication.

[0018] The beneficial effects of this utility model are reflected in:

[0019] 1. This utility model uses a hose clamp or welding method to form and fix the sealing dynamic ring onto the rotating shaft; the fixing flange of the sealing stationary ring is locked with bolts to lock multiple sealing stationary rings onto the outer end face of the equipment housing or cover. The multiple sealing stationary rings are spliced ​​and locked together by locking the mating flange of the sealing stationary ring with bolts. The sealing stationary ring dustproof ring is fixed and locked onto the stationary ring cover by bolts via a pressure ring, and the stationary ring dustproof ring is in contact with the axial surface of the rotating shaft. The bottom of the sealing stationary ring is connected to an oil return pipe that connects to the equipment lubrication system, or an oil return port is opened on the equipment cover near the inner bottom wall of the stationary ring cover that connects to the inside of the equipment cover.

[0020] 2. In this utility model, when the original seal wears out, the lubricating medium will seep out along the shaft surface. Part of the lubricating medium, under the influence of gravity, will flow downwards along the outer wall of the equipment housing end cover or outer wall of the cover, eventually flowing to the bottom of the external sealing stationary ring cavity. From there, it will be guided back into the lubrication system via the return oil pipe or return oil port at the bottom of the sealing stationary ring. The other part of the seeping lubricating medium will continue to seep outwards along the shaft surface. At this point, it will encounter the sealing rotating ring, which rotates with the shaft. Through the obstruction of the sealing rotating ring, and under the action of centrifugal force, the lubricating medium will be thrown away and onto the stationary ring. Under the influence of gravity, the lubricating medium on the inner wall of the enclosure flows down to the bottom along the inner wall of the stationary ring. It is then guided back into the lubrication system through the return oil pipe or return oil port. After the equipment has been running for a long time, a very small portion of the lubricating medium on the inner wall of the stationary ring enclosure will continue to flow along the inner wall. Under the influence of gravity, it will flow into the interior of the stationary ring enclosure. With the obstruction and guidance of the stationary ring oil collection groove, it will flow back to the bottom of the cavity of the external stationary ring enclosure and be guided back into the lubrication system through the return oil pipe or return oil port, thus effectively preventing the leakage of lubricating medium.

[0021] 3. This utility model, by adding an external circulating oil return sealing device, ensures that the lubricating medium circulates continuously within the lubrication system through multi-stage flow guidance, preventing further leakage. Simultaneously, a dustproof ring is installed at the end of the sealing stationary ring, effectively preventing external media from entering the sealing cavity and contaminating the lubricating medium. This allows for online external installation without altering the original equipment structure, making installation convenient, wear-free, long-lasting, and easy to disassemble and maintain. Through internal circulation and external dustproof design, it achieves both internal oil protection and external dust protection, significantly reducing production and maintenance costs. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural view of the present invention;

[0023] Figure 2 This is another perspective three-dimensional structural view of the present invention;

[0024] Figure 3This is a three-dimensional structural cross-sectional view of the present invention;

[0025] Figure 4 This is a cross-sectional view of the three-dimensional structure of this utility model from another perspective;

[0026] Figure 5 This is a front view of the three-dimensional structure of this utility model;

[0027] Figure 6 This is a cross-sectional front view of the three-dimensional structure of this utility model from another perspective.

[0028] In the picture:

[0029] 1. Sealing stationary ring; 11. Stationary ring cover; 12. Stationary ring fixing flange; 13. Stationary ring butt flange; 14. Stationary ring dustproof ring; 15. Pressure ring;

[0030] 2. Return oil pipe;

[0031] 3. Rotation axis;

[0032] 4. Sealing ring;

[0033] 5. Static ring oil collection tank;

[0034] 6. Oil return port. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0036] Please see Figure 1-4 This utility model discloses an external circulating oil return sealing device, comprising:

[0037] The sealing stationary ring 1 is composed of multiple arc-shaped stationary ring covers 11 and multiple arc-shaped stationary ring fixing flanges 12. The stationary ring fixing flanges 12 are set on the end face of the equipment box or cover. The sealing medium is on the side of the equipment box away from the sealing stationary ring 1. The stationary ring fixing flanges 12 are fixed to the end face of the equipment box or cover by bolts. This facilitates the installation of the stationary ring covers 11 on the end face of the equipment box or cover. The sealing stationary ring 1 is installed on the side of the end face of the equipment box or cover away from the lubricating medium, which is beneficial for the installation of the sealing stationary ring 1 outside the equipment and prevents the lubricating medium from leaking.

[0038] Oil return pipe 2 is located at the bottom of the sealing stationary ring 1 and is connected to the lubrication equipment. Oil return pipe 2 is used to guide the lubricating medium in the sealing stationary ring cavity back to the equipment lubrication system.

[0039] Oil return port 6 is located on the equipment cover near the inner bottom wall of the stationary ring cover. Oil return port 6 is used to guide the lubricating medium in the sealed stationary ring cavity back into the equipment cover. Oil return port 6 is higher than the liquid level of the lubricating medium.

[0040] A rotating shaft 3 is set inside the sealing stationary ring 1, and a roller is provided on the rotating shaft 3 for connecting the equipment housing. An oil return hole is opened on the outer side of the roller and on the end face of the equipment housing or cover, located inside the stationary ring cover 11, so as to return the lubricating medium in the stationary ring cover 11 to the side of the equipment housing or cover containing the lubricating medium.

[0041] The sealing ring 4 is mounted on the rotating shaft 3 and rotates together with the rotating shaft 3. The sealing ring 4 has a split structure, and may be at least a single split or formed by splicing multiple segments. It is fixed by locking with a hose clamp or by welding. The sealing ring 4 does not contact the sealing stationary ring 1 and maintains relative movement. The sealing ring 4 is away from the axial surface of the rotating shaft. The sealing ring 4 has at least one oil-blocking tooth and at least one oil-blocking tooth. The sealing ring 4 is used to block the lubricating medium and throw it off the inner wall of the stationary ring cover 11. The sealing ring 4 is an oil-slinging ring or an oil-blocking ring, and there are one or more sealing rings 4.

[0042] The stationary ring oil collection groove 5 is located on the inner wall of the cavity of the sealing stationary ring 1, adjacent to the dustproof ring 14 of the stationary ring. The stationary ring oil collection groove 5 is used to collect the lubricating medium that is thrown off the sealing moving ring 4 onto the inner wall of the stationary ring cover, and guide it to the bottom of the cavity of the sealing stationary ring 1. It then returns to the lubrication system for circulation lubrication through the return oil pipe 2 or the return oil port 6.

[0043] When using this equipment, it is necessary to pre-lay the return oil pipe 2 according to the lubrication system structure, and to pre-open the return oil port 6 and return oil pipe 2 according to the design dimensions. Then, install the sealing rotating ring 4 on the rotating shaft 3, and then install the sealing stationary ring 1. After the rotating shaft 3 in the equipment housing has been running for a long time, the lubricating medium on the inner wall of the stationary ring cover 11 will accumulate over a long period. A small portion of the lubricating medium will continue to flow forward along the inner wall of the stationary ring cover 11, and under the action of gravity, it will flow to the stationary ring. In the annular oil collection tank 5, under the obstruction and guidance of the stationary annular oil collection tank 5, the oil flows back to the bottom of the stationary annular cover 11, and is guided back to the equipment lubrication system through the return oil pipe 2 or the return oil port 6. Through the above, after the external circulating return oil sealing device is installed, the lubricating medium is always circulating and lubricating inside the lubrication system through multi-stage guidance, and cannot continue to seep out. At the same time, a stationary annular dustproof ring 14 is also set on the sealing stationary ring 1, which can effectively prevent external medium from entering the interior of the stationary annular cover 11 and avoid contaminating the lubricating medium.

[0044] In a specific embodiment, the sealing stationary ring 1 includes a sealing stationary ring docking flange 13 for connecting multiple arc-shaped sealing stationary ring covers and a stationary ring fixing flange 12 for fixing the sealing stationary ring 1. A stationary ring oil baffle is provided between the stationary ring fixing flange 12 and the equipment housing. An opening adapted to the oil return port is opened on the stationary ring oil baffle. Through the stationary ring docking flange 13, each stationary ring cover 11 is connected into a ring by bolt locking. Then, it is locked and fixed to the outer end face of the equipment housing or cover by the sealing stationary ring fixing flange 12. The stationary ring oil baffle is used to block or buffer the front-end lubricating medium.

[0045] It also includes a stationary ring dustproof ring 14 disposed on the stationary ring cover 11, and the stationary ring dustproof ring 14 is in contact with the axial surface of the rotating shaft 3;

[0046] It also includes a pressure ring 15 disposed on the outside of the stationary dustproof ring 14 to press and seal the stationary dustproof ring. The pressure ring 15 locks and fixes the stationary dustproof ring 14 to the outer end face of the stationary ring cover 11 with bolts to keep it stationary. The stationary dustproof ring 14 is made of rubber or polymer easily moldable material.

[0047] In one embodiment, the sealing ring 4 is a split structure, formed by splicing, and fixed to the rotating shaft 3 by means of hose clamp locking or welding. It rotates together with the rotating shaft 3. The longitudinal section of the sealing ring 4 is a C-shape symmetrical about the axis of the rotating shaft 3. When the lubricating medium continues to flow outward through the rotating shaft 3, it is blocked by the sealing ring 4 and under the action of centrifugal force. The lubricating medium is thrown off onto the inner wall of the stationary ring cover 11 of the sealing ring 1. Under the action of gravity, the lubricating medium on the inner wall will flow into the bottom along the inner wall of the stationary ring cover 11 and be guided back into the lubrication system through the oil return pipe 2 or the oil return port 6.

[0048] In a specific embodiment, the equipment housing near the inner bottom wall of the stationary ring cover 11 is provided with an oil return port, which is used to return the seeping lubricating medium to the lubricating medium side of the equipment housing away from the stationary ring cover 11.

[0049] In one embodiment, the longitudinal section of the stationary ring oil collection groove 5 is L-shaped and the stationary ring oil collection groove 5 is circular. The stationary ring oil collection groove 5 is disposed on the inner wall of the cavity of the sealing stationary ring 1, adjacent to the stationary ring dustproof ring 14 side, and the stationary ring oil collection groove 5 is used to collect and guide the lubricating medium that is thrown off the sealing moving ring 4 onto the stationary ring cover 11.

[0050] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0052] Additionally, "multiple" refers to two or more.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An external circulating oil return sealing device, characterized in that, include: The sealing stationary ring (1) is composed of a multi-segment arc-shaped stationary ring cover (11), a multi-segment arc-shaped stationary ring fixing flange (12) and a multi-segment stationary ring oil collection groove (5). The stationary ring fixing flange (12) is located on the end face of the equipment box or cover. The sealing medium is located on the side of the equipment box away from the sealing stationary ring (1). The return oil pipe (2) is located at the bottom of the sealing stationary ring (1) and is connected to the equipment lubrication system. The return oil pipe (2) is used to guide the lubricating medium in the cavity of the sealing stationary ring (1) back to the equipment lubrication system. The oil return port (6) is located on the equipment cover near the inner bottom wall of the stationary ring cover (11). The oil return port (6) is used to guide the lubricating medium in the sealed stationary ring cavity back into the equipment cover. A rotating shaft (3) is set inside a sealing stationary ring (1), and a roller for connecting the equipment housing is provided on the rotating shaft (3); A sealing ring (4) is disposed on a rotating shaft (3) and is disposed inside a sealing ring (1). The sealing ring (4) has at least one ring and is provided with oil-blocking teeth. The sealing ring (4) is used to block the lubricating medium and throw it off the inner wall of the stationary ring cover (11). The stationary ring oil collection groove (5) is located inside the sealing stationary ring (1), and the stationary ring oil collection groove (5) is located on the side of the sealing moving ring (4) away from the equipment housing. The stationary ring oil collection groove (5) is used to collect the leaked lubricating medium.

2. The external circulating oil return sealing device according to claim 1, characterized in that: The sealing stationary ring (1) includes a stationary ring mating flange (13) for connecting the multi-segment arc-shaped stationary ring cover (11); It also includes a stationary ring dustproof ring (14) disposed on the stationary ring cover (11), and the stationary ring dustproof ring (14) is in contact with the axial surface of the rotating shaft (3); It also includes a pressure ring (15) set on the outside of the stationary ring dustproof ring (14) to fix and press the stationary ring dustproof ring (14) onto the stationary ring cover (11), and the pressure ring (15) and the stationary ring cover (11) are fixedly installed by bolts.

3. The external circulating oil return sealing device according to claim 1, characterized in that: The sealing ring (4) is a split structure, which is at least a single split or a multi-segment splicing. The longitudinal section of the sealing ring (4) is a C-shape symmetrical about the axis of rotation (3).

4. The external circulating oil return sealing device according to claim 1, characterized in that: The equipment housing near the inner bottom wall of the stationary ring cover (11) has an oil return port (6) for guiding the lubricating medium in the sealed stationary ring (1) cavity back into the equipment housing.

5. The external circulating oil return sealing device according to claim 2, characterized in that: The longitudinal section of the stationary ring oil collection groove (5) is L-shaped, and the stationary ring oil collection groove (5) is circular in shape. The stationary ring oil collection groove (5) is located on the inner wall of the cavity of the stationary ring cover (11), adjacent to the stationary ring dustproof ring (14). The stationary ring oil collection groove (5) is used to collect the lubricating medium that was thrown off the sealing moving ring (4) onto the inner wall of the stationary ring cover (11) and guide it to the bottom of the cavity of the sealing stationary ring (1). It then returns to the lubrication system for circulation lubrication through the return oil pipe (2) or the return oil port (6).

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