A rotating shaft sealing kit for a pulp mill

Abstract

The utility model relates to paper production field, specifically say a kind of rotation shaft sealing kit based on paper pulp refiner, including the dynamic ring rotating with rotation shaft and the static ring being set on refiner shell, the dynamic ring is provided with sealing ring between static ring, the dynamic ring is also provided with sealing compensation module between static ring;The rotation shaft sealing kit based on paper pulp refiner of the utility model, by setting sealing ring between dynamic ring and static ring, and cooperate sealing compensation module, even in long time operation or wear, still can keep good seal, effectively prevent leakage, reduce the material loss caused by leakage, improve production efficiency, while also reduce the risk of environmental pollution, and adopt detachable design, so that daily inspection and replacement are more convenient and fast, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of paper production, specifically a rotary shaft sealing kit based on a pulp refiner. Background Technology

[0002] In industrial equipment such as pulp refiners, rotary shaft seals are one of the key technologies for ensuring the normal operation of the equipment. Traditional rotary shaft seal devices typically employ simple packing seals or mechanical seals. However, with long-term operation, especially under high-load conditions, the sealing material is prone to wear or aging, leading to a decline in sealing performance and even leakage. This not only affects production efficiency but also causes material loss and environmental pollution. Furthermore, traditional sealing devices often employ non-removable or difficult-to-remove designs, meaning that repairs or replacements after a malfunction often require significant time and manpower, increasing maintenance costs. Therefore, overcoming these technical problems and shortcomings has become a key issue that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to overcome the defects described in the background art, thereby realizing a rotary shaft sealing kit based on a pulp refiner. This kit ensures good sealing performance even after long-term operation or wear by setting a sealing ring between the dynamic ring and the static ring and cooperating with a sealing compensation module. It effectively prevents leakage, reduces material loss caused by leakage, improves production efficiency, and also reduces the risk of environmental pollution. The detachable design makes daily inspection and replacement more convenient and quick, reducing maintenance costs.

[0004] To achieve the aforementioned objectives, the technical solution of this invention is: a rotary shaft sealing kit based on a pulp refiner, comprising a dynamic ring that rotates with the rotary shaft and a static ring disposed on the refiner housing. A sealing ring is disposed between the dynamic ring and the static ring. A sealing compensation module is also disposed between the dynamic ring and the static ring.

[0005] The static ring is detachably provided with a fixed ring at its end, and the static ring is sleeved on the dynamic ring between the dynamic ring and the fixed ring.

[0006] In the aforementioned rotary shaft sealing kit based on a pulp refiner, both the fixed ring and the dynamic ring have circumferentially circumferentially circumferentially shaped grooves at their ends. A fixing bolt that can abut against the rotary shaft is detachably installed in the circumferential groove, and a flange is fixedly installed at the other end of the dynamic ring.

[0007] The limiting grooves on the fixed ring and the limiting grooves on the dynamic ring are positioned to correspond to each other.

[0008] In the aforementioned rotary shaft sealing kit based on a pulp refiner, a retaining ring is fitted on the dynamic ring between the static ring and the fixed ring, and the retaining ring and the static ring are detachably configured.

[0009] A retaining groove is provided on the inner ring of the side where the static ring and the retaining ring are in contact, and the sealing ring is fitted on the dynamic ring inside the retaining groove.

[0010] The other side of the static ring is provided with a sealing gasket that can abut against the housing of the refiner.

[0011] In the aforementioned rotary shaft sealing kit based on a pulp refiner, the sealing compensation module includes a limiting ring fitted on a dynamic ring on the flange side, and a sealing ring fitted on the dynamic ring on the side of the limiting ring. A support ring, having a T-shaped cross-section, is fitted on the dynamic ring between the sealing ring and the static ring, and the sealing ring is located between the support ring and the limiting ring. An extrusion ring, capable of abutting against the side of the static ring, is fitted on the dynamic ring on the other side of the support ring.

[0012] The static ring has an extrusion groove on its side, and the extrusion groove is provided with an extrusion unit for extruding the extrusion ring and the sealing ring.

[0013] In the aforementioned rotary shaft sealing kit based on a pulp refiner, a protrusion is provided at the top side of the limiting ring, and the sealing ring is located below the support ring and between the protrusion of the limiting ring.

[0014] In the aforementioned rotary shaft sealing kit based on a pulp refiner, an elastic skeleton is fixedly provided in the middle of the sealing ring, multiple abutment grooves are provided at the bottom of the sealing ring, and the side of the sealing ring facing the support ring is an inclined plane.

[0015] In the aforementioned rotary shaft seal kit based on a pulp refiner, the compression ring has a hollow structure and its side facing the static ring is an inclined plane.

[0016] In the aforementioned rotary shaft sealing assembly based on a pulp refiner, the extrusion unit includes a plurality of extrusion frames circumferentially arranged on a support ring, which are slidable along its axial direction. One end of each extrusion frame abuts against the inclined surface of the sealing ring. An extrusion block is fixedly disposed at the other end of the extrusion frame, and the bottom of the extrusion block abuts against the side of the extrusion ring.

[0017] A compression ring is fitted inside the limiting groove, and the side of the compression ring can extend out of the side of the static ring and abut against the corresponding compression block. Multiple springs are arranged around the circumference of the limiting groove between the other side of the compression ring and the static ring.

[0018] Compared with the prior art, the rotary shaft sealing kit based on a pulp refiner of this invention has at least the following beneficial effects:

[0019] 1. The rotary shaft sealing kit of this utility model, based on a pulp refiner, ensures good sealing performance even after long-term operation or wear by setting a sealing ring between the dynamic ring and the static ring and cooperating with a sealing compensation module. This effectively prevents leakage, reduces material loss caused by leakage, improves production efficiency, and also reduces the risk of environmental pollution. The detachable design makes daily inspection and replacement more convenient and quick, reducing maintenance costs.

[0020] 2. The rotary shaft sealing kit based on the pulp refiner of this utility model improves the flexibility and adaptability of the sealing ring through the elastic skeleton design in the sealing ring, which can better cope with the impact caused by the dynamic ring speed change, and enhance the stability and reliability of the system.

[0021] 3. The rotary shaft sealing kit based on the pulp refiner of this utility model, through the coordinated action of the support ring, sealing ring and extrusion ring in the sealing compensation module, and the continuous pressure provided by the extrusion unit, and in conjunction with the abutment groove, ensures that the sealing ring is tightly attached to the surface of the dynamic ring. Even when the sealing material is reduced due to wear, the sealing force can be automatically adjusted to maintain the sealing effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the rotary shaft sealing kit based on a pulp refiner according to this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the rotary shaft sealing kit based on a pulp refiner according to this utility model;

[0024] Figure 3 This is an exploded structural diagram of the rotary shaft sealing kit based on a pulp refiner according to this utility model.

[0025] In the diagram: 1. Dynamic ring; 2. Static ring; 3. Sealing ring;

[0026] 4. Sealing compensation module; 41. Limiting ring; 42. Sealing ring; 43. Support ring; 44. Extrusion ring; 45. Extrusion groove;

[0027] 46. ​​Extrusion unit; 461. Extrusion frame; 462. Extrusion block; 463. Extrusion ring; 464. Spring;

[0028] 47. Protrusion; 48. Elastic skeleton; 49. Abutment groove;

[0029] 5. Retaining ring; 6. Limiting groove; 7. Fixing bolt; 8. Flange; 9. Retaining ring; 10. Retaining groove; 11. Sealing gasket. Detailed Implementation

[0030] The rotary shaft sealing kit based on a pulp refiner of this utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] See Figures 1-3 This embodiment of the rotary shaft sealing kit for a pulp refiner, by setting a sealing ring 3 between the dynamic ring 1 and the static ring 2, and cooperating with a sealing compensation module 4, ensures that good sealing performance is maintained even after long-term operation or wear, effectively preventing leakage, reducing material loss caused by leakage, and improving production efficiency. It also reduces the risk of environmental pollution, and the detachable design makes daily inspection and replacement more convenient and quick, reducing maintenance costs. In this embodiment, it mainly includes a dynamic ring 1 that rotates with the rotary shaft and a static ring 2 set on the refiner housing. A fixing ring 5 is detachably set at the end of the static ring 2, and the static ring 2 is fitted onto the dynamic ring 1 between the dynamic ring 1 and the fixing ring 5. The static ring 2 has bolt holes that can be adapted to the refiner housing. Both the fixing ring 5 and the dynamic ring 1 have circumferentially formed limiting grooves 6 at their ends. A fixing bolt 7 that can abut against the rotary shaft is detachably set in the limiting groove 6, and the limiting groove 6 on the fixing ring 5 corresponds to the limiting groove 6 on the dynamic ring 1. A flange 8 is fixedly provided at the other end of the dynamic ring 1. The static ring 2 is sleeved on the dynamic ring 1 and fixed to the grinding mill housing. The fixed ring 5 is sleeved on the dynamic ring 1, and the fixed ring 5 and the dynamic ring 1 are fixed to the rotating shaft by inserting the fixing bolt 7 into the corresponding limiting groove 6.

[0033] A retaining ring 9 is fitted onto the dynamic ring 1 between the static ring 2 and the fixed ring 5. The retaining ring 9 is detachably mounted on the static ring 2. A retaining groove 10 is formed on the inner ring of the side of the static ring 2 that is in contact with the retaining ring 9. A sealing ring 3 is provided between the dynamic ring 1 and the static ring 2. The sealing ring 3 is fitted onto the dynamic ring 1 inside the retaining groove 10. A sealing gasket 11 is provided on the other side of the static ring 2, which can abut against the mill housing. The sealing ring 3 is fitted onto the dynamic ring 1 and moved into the retaining groove 10 to seal the rotating shaft. Then, the retaining ring 9 is fitted onto the dynamic ring 1 to cover the retaining groove 10 and fix the sealing ring 3. When installing the static ring 2, the sealing gasket 11 is first placed between the static ring 2 and the mill housing.

[0034] To maintain the sealing of the rotating shaft. See also Figures 1-3 In this embodiment, a sealing compensation module 4 is further provided between the dynamic ring 1 and the static ring 2. The sealing compensation module 4 includes a limiting ring 41 fitted on the dynamic ring 1 on the side of the flange 8, and a sealing ring 42 fitted on the dynamic ring 1 on the side of the limiting ring 41. A support ring 43 is fitted on the dynamic ring 1 between the sealing ring 42 and the static ring 2. The support ring 43 has a T-shaped cross-section, and the sealing ring 42 is located between the support ring 43 and the limiting ring 41. An extrusion ring 44 is fitted on the dynamic ring 1 on the other side of the support ring 43, which can abut against the side of the static ring 2. An extrusion groove 45 is provided on the side of the static ring 2, and an extrusion unit 46 for extruding the extrusion ring 44 and the sealing ring 42 is provided inside the extrusion groove 45. A protrusion 47 is provided at the top of the side of the limiting ring 41, and the sealing ring 42 is located below the support ring 43 and between the protrusion 47 of the limiting ring 41. An elastic skeleton 48 is fixedly provided in the middle of the sealing ring 42, and multiple abutment grooves 49 are opened at the bottom of the sealing ring 42. The side of the sealing ring 42 facing the support ring 43 is an inclined plane. The extrusion ring 44 is a hollow structure and its side facing the static ring 2 is an inclined plane.

[0035] During assembly, first, the limiting ring 41 is fitted onto the dynamic ring 1 and abuts against the flange 8. Then, the sealing ring 42 is fitted onto the dynamic ring 1 and abuts against the protrusion 47. Next, the support ring 43 is fitted onto the dynamic ring 1 and abuts against the sealing ring 42. Finally, the extrusion ring 44 is fitted onto the dynamic ring 1 and abuts against the side of the support ring 43.

[0036] The extrusion unit 46 includes a plurality of extrusion frames 461 circumferentially arranged on a support ring 43, which can slide along its axial direction. One end of each extrusion frame 461 abuts against the inclined surface of a sealing ring 42. An extrusion block 462 is fixedly arranged at the other end of each extrusion frame 461, and the bottom of the extrusion block 462 abuts against the side of an extrusion ring 44. An extrusion ring 463 is sleeved inside the limiting groove 6, and the side of the extrusion ring 463 can extend out of the side of the static ring 2 and abut against the corresponding extrusion block 462. A plurality of springs 464 are arranged circumferentially within the limiting groove 6 between the other side of the extrusion ring 463 and the static ring 2.

[0037] During installation, the end of the extrusion frame 461 abuts against the sealing ring 42, and the extrusion block 462 abuts against the extrusion ring 463. When the rotating shaft rotates, the sealing ring 3, the sealing ring 42, and the extrusion ring 44 cooperate to achieve a seal on the rotating shaft. During this process, under the action of the spring 464, the extrusion ring 463 continuously presses against the corresponding extrusion block 462, thereby ensuring that the extrusion ring 44 is always in contact with the dynamic ring 1 through the extrusion block 462. Simultaneously, the extrusion frame 461 presses against the inclined surface of the sealing ring 42, causing the sealing ring 42 to move towards the center. During this process, the skeleton spring 464 increases the hardness of the sealing ring 42, and the abutment groove 49 reduces the load-bearing capacity of the inner ring of the sealing ring 42, thus facilitating the extrusion of the sealing ring 42 and ensuring that the sealing ring 42 is always in contact with the dynamic ring 1.

[0038] The method of using the rotary shaft sealing kit for a pulp refiner according to this utility model is as follows: First, the limiting ring 41 is fitted onto the dynamic ring 1 and abuts against the flange 8. Then, the sealing ring 42 is fitted onto the dynamic ring 1 and abuts against the protrusion 47. The support ring 43 is fitted onto the dynamic ring 1 and abuts against the sealing ring 42. Then, the extrusion ring 44 is fitted onto the dynamic ring 1 and abuts against the side of the support ring 43. During this process, the end of the extrusion frame 461 abuts against the sealing ring 42, and the extrusion block 462 abuts against the extrusion ring 463. The sealing gasket 11 is placed between the static ring 2 and the refiner housing. Then, the static ring 2 is fitted onto the dynamic ring 1 and fixed to the refiner housing. The sealing ring 3 is fitted onto the dynamic ring 1 and moved into the retaining groove 10 to seal the rotary shaft. Then, the retaining ring 9 is fitted onto the dynamic ring 1 to cover the retaining groove 10 and fix the sealing ring 3. The fixed ring 5 is fitted onto the dynamic ring 1, and the fixed ring 5 and the dynamic ring 1 are fixed to the rotating shaft by inserting the fixing bolt 7 into the corresponding limiting groove 6. At this time, the static ring 2 and the baffle are fixed.

[0039] When the rotating shaft rotates, the sealing of the rotating shaft is achieved through the cooperation of the sealing ring 3, the sealing ring 42, and the compression ring 44. During this process, under the action of the spring 464, the compression ring 463 constantly compresses the corresponding compression block 462, thereby ensuring that the compression ring 44 is always in contact with the dynamic ring 1 through the compression block 462. At the same time, the compression frame 461 compresses the inclined surface of the sealing ring 42, causing the sealing ring 42 to move towards the center. During this process, the rigidity of the sealing ring 42 is increased by the skeleton spring 464, and the bearing capacity of the inner ring of the sealing ring 42 is reduced by the abutment groove 49, thereby facilitating the compression of the sealing ring 42 and ensuring that the sealing ring 42 is always in contact with the dynamic ring 1.

[0040] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains. The use of terms such as "a" or "an" in this specification and claims does not necessarily indicate a limitation on quantity. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0041] The exemplary embodiments of the present invention have been described in detail above with reference to preferred embodiments. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of the present invention, and various combinations can be made to the various technical features and structures proposed by the present invention without exceeding the protection scope of the present invention.

Claims

1. A rotating shaft sealing kit for a pulp mill based on a paper stock, characterized by: It includes a dynamic ring (1) that rotates with the rotating shaft and a static ring (2) set on the housing of the grinding mill. A sealing ring (3) is provided between the dynamic ring (1) and the static ring (2). A sealing compensation module (4) is also provided between the dynamic ring (1) and the static ring (2). The static ring (2) is detachably provided with a fixed ring (5) at its end, and the static ring (2) is sleeved on the dynamic ring (1) between the dynamic ring (1) and the fixed ring (5).

2. A rotating shaft sealing kit for a pulp mill based on a paper pulp mill, according to claim 1, characterized in that: Both the fixed ring (5) and the dynamic ring (1) have circumferentially provided limiting grooves (6) at their ends. A fixing bolt (7) that can abut against the rotating shaft is detachably provided in the limiting groove (6). A flange (8) is fixedly provided at the other end of the dynamic ring (1). The limiting groove (6) on the fixed ring (5) corresponds to the limiting groove (6) on the dynamic ring (1).

3. A rotating shaft sealing kit for a pulp mill based on a paper pulp mill, according to claim 1, characterized in that: A retaining ring (9) is fitted on the dynamic ring (1) between the static ring (2) and the fixed ring (5), and the retaining ring (9) and the static ring (2) are detachably connected; A retaining groove (10) is provided on the inner ring of the side of the static ring (2) that is in contact with the retaining ring (9), and the sealing ring (3) is sleeved on the dynamic ring (1) inside the retaining groove (10); The other side of the static ring (2) is provided with a sealing gasket (11) that can abut against the housing of the refiner.

4. A rotating shaft seal kit for a pulp mill based on a paper pulp mill, according to claim 2, characterized in that: The sealing compensation module (4) includes a limiting ring (41) fitted on the dynamic ring (1) on the side of the flange (8), a sealing ring (42) fitted on the dynamic ring (1) on the side of the limiting ring (41), a support ring (43) fitted on the dynamic ring (1) between the sealing ring (42) and the static ring (2), the cross-section of the support ring (43) is a T-shaped structure, the sealing ring (42) is located between the support ring (43) and the limiting ring (41), and a compression ring (44) fitted on the dynamic ring (1) on the other side of the support ring (43) that can abut against the side of the static ring (2); The static ring (2) has an extrusion groove (45) on its side, and the extrusion groove (45) is provided with an extrusion unit (46) for extruding the extrusion ring (44) and the sealing ring (42).

5. The rotary shaft sealing kit based on a pulp refiner according to claim 4, characterized in that: The limiting ring (41) has a protrusion (47) at the top of its side, and the sealing ring (42) is located below the support ring (43) and between the protrusion (47) of the limiting ring (41).

6. The rotary shaft sealing kit based on a pulp refiner according to claim 5, characterized in that: An elastic skeleton (48) is fixedly provided in the middle of the sealing ring (42), and a plurality of abutment grooves (49) are provided at the bottom of the sealing ring (42). The side of the sealing ring (42) facing the support ring (43) is an inclined plane.

7. The rotary shaft sealing kit based on a pulp refiner according to claim 6, characterized in that: The extrusion ring (44) is a hollow structure and its side facing the static ring (2) is an inclined plane.

8. The rotary shaft sealing kit based on a pulp refiner according to claim 7, characterized in that: The extrusion unit (46) includes a plurality of extrusion frames (461) arranged circumferentially on the support ring (43) and slidable along its axial direction. One end of the extrusion frame (461) abuts against the inclined surface of the sealing ring (42), and the other end of the extrusion frame (461) is fixedly provided with an extrusion block (462). The bottom of the extrusion block (462) abuts against the side of the extrusion ring (44). The limiting groove (6) is fitted with a compression ring (463). The side of the compression ring (463) can extend out of the side of the static ring (2) and abut against the corresponding compression block (462). Multiple springs (464) are arranged on the inner circumference of the limiting groove (6) between the other side of the compression ring (463) and the static ring (2).

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