Sealing device

Abstract

The utility model discloses a sealing device, which belongs to the technical field of sealing components, is used for connecting a water tank with a rotating shaft in a sealing manner, and comprises an expansion joint sealing ring and a sealing limiting piece sleeved on the outer side of the rotating shaft, the sealing limiting piece comprises a limiting ring and a lip-shaped sealing ring; the lip-shaped sealing ring abuts against the outer side of the rotating shaft through the limiting ring. The water tank is hermetically connected with the limiting ring through the expansion joint sealing ring; the water tank and the rotating shaft can be separated from each other through the expansion joint sealing ring, and therefore relative rotation of the sealing ring and the water tank in existing equipment can be converted into relative rotation between the lip-shaped sealing ring and the limiting ring. Therefore, the problem of sealing ring abrasion caused by contact surface fault can be avoided, and meanwhile, the sealing ring of the expansion joint is soft and elastic, so that the problem of leakage at the joint caused by vibration can be further solved, and the service life of equipment is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing components, and particularly relates to a sealing device. Background Art

[0002] The papermaking process cannot be separated from water, so for equipment that can realize automated papermaking, the sealing between the equipment and the water tank is particularly important. In order to prevent the water in the water tank from penetrating into the rotating shaft, the existing papermaking equipment usually sets a V-shaped sealing ring at the connection between the water tank and the rotating shaft, so that the rotating shaft can also drive the V-shaped sealing ring to rotate while rotating, thereby ensuring that the V-shaped sealing ring can always fit the connection between the water tank and the rotating shaft to ensure the sealing effect. However, because the existing water tank is usually composed of an upper and lower structure that is locked, as time goes by, the joint line of the upper and lower structures of the water tank is prone to damage the rotating V-shaped sealing ring, which will affect the sealing of the equipment, and will also generate severe vibrations during the operation of the equipment, which will further cause dripping problems at the connection between the V-shaped sealing ring and the water tank. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to provide a sealing device which can ensure the sealing performance of the equipment without affecting the normal operation of the rotating shaft.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A sealing device, which is used to seal the water tank and the rotating shaft, and includes an expansion joint sealing ring and a sealing stopper sleeved on the outer side of the rotating shaft;

[0006] The sealing limiter comprises a limit ring and a lip sealing ring;

[0007] The lip seal ring contacts the outer side of the rotating shaft through a limiting ring;

[0008] The water tank is sealed and connected with the limit ring through the expansion joint sealing ring.

[0009] Furthermore, along the axial direction of the limiting ring, at least one separating ring is provided on the inner wall of the limiting ring;

[0010] The closed end of the lip seal ring abuts against the separation ring;

[0011] The opening end of the lip seal ring is arranged toward the water tank.

[0012] Furthermore, the number of the lip seal rings is at least two;

[0013] Along the axial direction of the limiting ring, the lip sealing ring and the separation ring are arranged at intervals, and the closed end of the lip sealing ring is in conflict with the separation ring, and the open end of the lip sealing ring is arranged toward the water tank.

[0014] Furthermore, a first locking ring, an elastic ring and a second locking ring are sequentially connected from inside to outside along the radial direction of the expansion joint sealing ring;

[0015] The expansion joint sealing ring is connected to the limit ring through a first locking ring;

[0016] The expansion joint sealing ring is connected to the water tank through a second locking ring.

[0017] Furthermore, the first locking ring, the elastic ring and the second locking ring are an integrated annular structure.

[0018] Furthermore, the cross section of the elastic ring is C-shaped, and the open end of the elastic ring is arranged toward the water tank.

[0019] Furthermore, it also includes a bearing seat and a connecting piece;

[0020] The bearing seat and the connecting piece are both sleeved on the outside of the rotating shaft;

[0021] The connecting piece is arranged between the limiting ring and the bearing seat;

[0022] A bearing cover is provided at one end of the bearing seat close to the limiting ring;

[0023] The limiting ring is connected to the bearing cover through a connecting piece.

[0024] The beneficial effect of the utility model is that the sealing device provided by the utility model can separate the water tank and the rotating shaft from each other through the expansion joint sealing ring, so that the relative rotation of the sealing ring and the water tank in the existing equipment can be converted into the relative rotation between the lip sealing ring and the limit ring. Since the annular structure can be integrally formed, the wear problem of the sealing ring caused by the contact surface fault can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Shown is a front cross-sectional view of a sealing device according to a specific embodiment of the utility model;

[0026] Figure 2 Shown Figure 1 A magnified view of point A;

[0027] Figure 3 Shown is a partial cross-sectional view of an expansion joint sealing ring according to a specific embodiment of the utility model;

[0028] Figure 4 Shown is a cross-sectional view of an expansion joint sealing ring according to a specific embodiment of the utility model;

[0029] Description of labels:

[0030] 1. Water tank;

[0031] 2. Rotating shaft;

[0032] 3. Expansion joint sealing ring; 31. First locking ring; 32. Elastic ring; 33. Second locking ring; 34. Locking hole;

[0033] 4. Sealing limiter; 41. Limiting ring; 411. Separating ring; 42. Lip sealing ring;

[0034] 5. Connectors;

[0035] 6. Bearing cover. DETAILED DESCRIPTION

[0036] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0037] The most critical concept of the utility model is that the water tank and the rotating shaft can be separated from each other by the expansion joint sealing ring, so that the relative rotation of the sealing ring and the water tank in the existing equipment can be converted into the relative rotation between the lip sealing ring and the limit ring. Since the annular structure can be integrally formed, the wear problem of the sealing ring caused by the contact surface fault can be effectively avoided.

[0038] Please refer to Figures 1 to 4 The sealing device provided by the utility model is used to seal the water tank 1 with the rotating shaft 2, and includes an expansion joint sealing ring 3 and a sealing stopper 4 sleeved on the outer side of the rotating shaft 2;

[0039] The sealing limiter 4 comprises a limit ring 41 and a lip seal ring 42;

[0040] The lip seal ring 42 contacts the outer side of the rotating shaft 2 through the limiting ring 41;

[0041] The water tank 1 is sealed and connected to the limit ring 41 via the expansion joint sealing ring 3 .

[0042] From the above description, it can be seen that the beneficial effect of the utility model is that: a sealing device is provided, which can separate the water tank 1 and the rotating shaft 2 from each other through the expansion joint sealing ring 3, so that the relative rotation of the sealing ring and the water tank 1 in the existing equipment can be converted into the relative rotation between the lip sealing ring 42 and the limit ring 41. Compared with the existing sealing device, because the annular structure can be integrally formed, it can avoid the problem of sealing ring wear caused by contact surface faults, thereby affecting the service life of the equipment.

[0043] Furthermore, along the axial direction of the limiting ring 41, at least one separating ring 411 is provided on the inner wall of the limiting ring 41;

[0044] The closed end of the lip seal ring 42 abuts against the separation ring 411;

[0045] The open end of the lip seal ring 42 is arranged toward the water tank 1 .

[0046] Further, the number of the lip seal rings 42 is at least two;

[0047] Along the axial direction of the limiting ring 41 , the lip seal ring 42 and the separation ring 411 are arranged at intervals, and the closed end of the lip seal ring 42 abuts against the separation ring 411 , and the open end of the lip seal ring 42 is arranged toward the water tank 1 .

[0048] From the above description, it can be seen that the separating ring 411 can separate the lip-shaped sealing rings 42 from each other, and each lip-shaped sealing ring 42 can form an independent sealing space under the cooperation of the limiting ring 41, the separating ring 411 and the axial surface of the rotating shaft 2. At the same time, multiple separating rings 411 and lip-shaped sealing rings 42 can be arranged on the axis of the limiting ring 41 according to actual needs, so as to achieve the effect of multiple sealing, thereby preventing moisture in the water tank 1 from penetrating into the interior of the equipment.

[0049] Furthermore, along the radial direction of the expansion joint sealing ring 3, a first locking ring 31, an elastic ring 32 and a second locking ring 33 are sequentially connected from inside to outside;

[0050] The expansion joint sealing ring 3 is connected to the limiting ring 41 through the first locking ring 31;

[0051] The expansion joint sealing ring 3 is connected to the water tank 1 through a second locking ring 33 .

[0052] Furthermore, the first locking ring 31 , the elastic ring 32 and the second locking ring 33 are an integrated annular structure.

[0053] Furthermore, the cross section of the elastic ring 32 is C-shaped, and the open end of the elastic ring 32 is arranged toward the water tank 1 .

[0054] Furthermore, locking holes 34 are provided on the first locking ring 31 and the second locking ring 33 .

[0055] From the above description, it can be seen that the design limits the specific structure of the expansion joint sealing ring 3. The limiting ring 41 and the water tank 1 are respectively connected by the first locking ring 31 and the second locking ring 33, so as to provide structural support for the separation of the water tank 1 and the rotating shaft 2. Because the elastic ring 32 is soft in texture and the open end is arranged toward the water tank 1, when it is impacted by water flow and the rotating shaft 2 vibrates, the elastic ring 32 can absorb the corresponding impact force, thereby improving the overall durability of the sealing device and avoiding dripping at the connection due to vibration.

[0056] Furthermore, the above-mentioned sealing device also includes a bearing seat and a connecting member 5;

[0057] The bearing seat and the connecting member 5 are sleeved on the outside of the rotating shaft 2;

[0058] The connecting member 5 is arranged between the limiting ring 41 and the bearing seat;

[0059] A bearing cover 6 is provided at one end of the bearing seat close to the limiting ring 41;

[0060] The limiting ring 41 is connected to the bearing cover 6 via the connecting member 5. Preferably, the connecting member 5 may be a cylindrical structure, so that a part of the rotating shaft 2 can be further covered inside the connecting member 5, thereby achieving a waterproof effect.

[0061] From the above description, it can be seen that the bearing seat can ensure the smoothness and stability of the rotation of the shaft 2, and the limit ring 41 is indirectly connected to the bearing cover 6 of the bearing seat through the connecting piece 5, which can also ensure the stability of the limit ring 41 during the actual working process, thereby avoiding dripping at the connection due to severe shaking of the equipment.

[0062] Furthermore, an annular stopper is provided on the end surface of the limiting ring 41 away from the connecting member 5;

[0063] When the limiting ring 41 is connected to the connecting piece 5, the end faces of the lip seal ring 42 located at both ends of the limiting ring 41 respectively conflict with the end face of the connecting piece 5 and the annular stopper, thereby preventing the lip seal ring 42 and the limiting ring 41 from separating from each other during the operation of the equipment.

[0064] The sealing device of the utility model can play a role in sealing equipment, and is particularly suitable for sealing the rotating shaft 2 and the water tank 1 of the papermaking equipment.

[0065] Please refer to Figures 1 to 4 , Embodiment 1 of the present utility model is:

[0066] A sealing device for sealingly connecting a water tank 1 with a rotating shaft 2, comprising an expansion joint sealing ring 3, a bearing seat, a connecting piece 5, and a sealing stopper 4 sleeved on the outer side of the rotating shaft 2; the sealing stopper 4 comprises a stopper ring 41 and two lip seals 42; the lip seals 42 are in contact with the outer side of the rotating shaft 2 through the stopper ring 41; the water tank 1 is sealedly connected with the stopper ring 41 through the expansion joint sealing ring 3; along the axial direction of the stopper ring 41, there is a Separation ring 411; the lip seal 42 and the separation ring 411 are arranged at intervals, and the closed end of the lip seal 42 is in conflict with the separation ring 411, and the open end of the lip seal 42 is arranged toward the water tank 1; the connecting piece 5 is a cylindrical structure; the bearing seat and the connecting piece 5 are both sleeved on the outside of the rotating shaft 2; the connecting piece 5 is arranged between the limiting ring 41 and the bearing seat; a bearing cover 6 is provided at one end of the bearing seat close to the limiting ring 41; the limiting ring 41 is connected to the bearing cover 6 through the connecting piece 5.

[0067] A first locking ring 31, an elastic ring 32 and a second locking ring 33 are sequentially connected along the radial direction of the expansion joint sealing ring 3 from inside to outside; the expansion joint sealing ring 3 is connected to the limiting ring 41 through the first locking ring 31; the expansion joint sealing ring 3 is connected to the water tank 1 through the second locking ring 33; the first locking ring 31, the elastic ring 32 and the second locking ring 33 are an integrated annular structure; the cross section of the elastic ring 32 is C-shaped, and the open end of the elastic ring 32 is arranged toward the water tank 1; locking holes 34 are provided on the first locking ring 31 and the second locking ring 33.

[0068] The working principle of the utility model is:

[0069] Assembly stage: First, according to actual needs, the lip seal 42 is embedded in the limit ring 41 in turn, and the rotating shaft 2 is passed through the bearing seat, the connecting piece 5, and the limit ring 41 with the lip seal 42 in turn; then, the two ends of the connecting piece 5 are respectively locked with the bearing cover 6 and the limit ring 41 through any locking parts; finally, the first locking ring 31 and the second locking ring 33 are respectively connected to the limit ring 41 and the water tank 1 to complete the assembly of the sealing device, thereby forming a sealing structure between the rotating shaft 2 and the water tank 1.

[0070] Working stage: when the equipment is started, the lip seal 42 can rotate synchronously driven by the rotating shaft 2. Since the inner surface of the limit ring 41 is smooth, the lip seal 42 can be prevented from being lost during the rotation process, and multiple lip seals 42 can be provided to form multiple waterproof obstacle avoidances; when the equipment vibrates violently or the internal water flow has a large impact force, the elastic ring 32 can absorb most of the impact force through its buffering effect, thereby effectively alleviating the problem of dripping at the connection due to vibration.

[0071] To sum up, the utility model provides a sealing device, which can separate the water tank and the rotating shaft from each other through the expansion joint sealing ring, so that the relative rotation between the sealing ring and the water tank in the existing equipment can be converted into the relative rotation between the lip sealing ring and the limit ring. Compared with the existing sealing device, since the annular structure can be integrally formed, the wear problem of the sealing ring caused by the contact surface fault can be avoided. At the same time, since the expansion joint sealing ring is soft and elastic, it can further solve the problem of dripping at the connection caused by vibration, thereby effectively improving the service life of the equipment.

[0072] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sealing device, which is used to seal a water tank and a rotating shaft, characterized in that: It includes an expansion joint sealing ring and a sealing stopper sleeved on the outside of the rotating shaft; The sealing limiter comprises a limit ring and a lip sealing ring; The lip seal ring contacts the outer side of the rotating shaft through a limiting ring; The water tank is sealed and connected with the limit ring through the expansion joint sealing ring.

2. The sealing device according to claim 1, characterized in that: At least one separating ring is provided on the inner wall of the limiting ring along the axial direction of the limiting ring; The closed end of the lip seal ring abuts against the separation ring; The opening end of the lip seal ring is arranged toward the water tank.

3. The sealing device according to claim 2, characterized in that: The number of the lip seals is at least two; Along the axial direction of the limiting ring, the lip sealing ring and the separation ring are arranged at intervals, and the closed end of the lip sealing ring is in conflict with the separation ring, and the open end of the lip sealing ring is arranged toward the water tank.

4. The sealing device according to claim 1, characterized in that: A first locking ring, an elastic ring and a second locking ring are sequentially connected from inside to outside along the radial direction of the expansion joint sealing ring; The expansion joint sealing ring is connected to the limit ring through a first locking ring; The expansion joint sealing ring is connected to the water tank through a second locking ring.

5. The sealing device according to claim 4, characterized in that: The first locking ring, the elastic ring and the second locking ring are an integrated annular structure.

6. The sealing device according to claim 4, characterized in that: The cross section of the elastic ring is C-shaped, and the open end of the elastic ring is arranged toward the water tank.

7. The sealing device according to claim 1, characterized in that: Also includes bearing seats and connectors; The bearing seat and the connecting piece are both sleeved on the outside of the rotating shaft; The connecting piece is arranged between the limiting ring and the bearing seat; A bearing cover is provided at one end of the bearing seat close to the limiting ring; The limiting ring is connected to the bearing cover through a connecting piece.

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