End sealing assembly of slag extraction auger

Abstract

The utility model provides a slag extraction auger end portion sealing assembly which comprises an equipment main shaft, and the outer side of the equipment main shaft is sequentially sleeved with an end portion cover plate, a water tank, a connecting gland and a tail portion cover plate from the medium end to the atmosphere end. A packing seal is arranged on one side, close to a medium, of the water tank to block the medium, and a polytetrafluoroethylene sliding sleeve is arranged on one side close to the atmosphere to replace a bearing in the conventional technology. The side wall of the water tank is provided with a water supplementing channel communicated to the packing seal, clear water can lubricate the packing seal, and redundant waste water and impurities can stay in the water storage chamber. Compared with a bearing in the prior art, the packing auger tail end sealing device can reduce damage of media to the sealing assembly on the premise that the sealing capacity of the packing auger tail end is guaranteed, and therefore the service life of the whole sealing assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to an auger sealing accessory, in particular to an end sealing component of a slag lifting auger. Background Art

[0002] The auger is a processing equipment in the chemical pulping process. It consists of two spirals rotating at different speeds. The auger washes the material with water and extracts the residue while conveying the wood chips, squeezing out excess water and fine impurities such as sawdust in the wood chips. Sealing devices are installed at both ends of the auger to prevent the medium from leaking from both ends of the auger. In the existing technology, two sets of skeleton oil seals are usually set on the front side of the seal, and bearing supports are set on the rear side. Since the auger generally works in a tilted state, moisture will accumulate at the tail end of the auger, resulting in inconsistent force on the bearing seats at both ends of the auger. In addition, since the stirring medium contains more impurities, the solid and liquid media generated during the working process will enter the bearings. The bearing balls are made of carbon steel and are easily corroded by corrosive components in the solid and liquid media, resulting in frequent replacement of the sealing components, which in turn increases the workload of workers. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an end sealing assembly of a slag extraction auger, including an equipment main shaft, the outer side of the equipment main shaft is sequentially provided with an end cover plate, a water tank, a connecting pressure cover and a tail cover plate from the medium end to the atmosphere end, the water tank includes a water storage chamber enclosed by a first side wall close to the medium side and a second side wall close to the atmosphere side, a packing seal is provided between the first side wall and the equipment main shaft, and a water supply channel connected to the packing seal is opened on the first side wall for providing lubricating water to the packing seal; a polytetrafluoroethylene sliding sleeve is installed between the radial inner side of the connecting pressure cover and the equipment main shaft.

[0004] Furthermore, the packing seals are arranged in multiple groups along the axial direction of the main shaft of the equipment, and a water dividing ring is provided on the outside of the packing seal, and the water dividing ring is arranged on the inside of the water supply channel.

[0005] Furthermore, a first groove with one side open is provided on the radial inner side of the first side wall, and the packing seal is sequentially installed in the first groove.

[0006] Furthermore, a packing pressure ring is installed at the opening of the first slot, one side of the packing pressure ring extends into the first slot and is fixed to the side of the first side wall by a third fastener.

[0007] Furthermore, a first annular ring is installed between the first side wall and the end cover plate.

[0008] Furthermore, a second slot is provided on the radial inner side of the connecting gland, and the polytetrafluoroethylene sliding sleeve is engaged in the second slot.

[0009] Furthermore, a wear-resistant bushing is installed between the polytetrafluoroethylene sliding sleeve and the main shaft of the equipment.

[0010] Furthermore, the tail cover plate is provided with a protruding ring extending into the second slot at one end close to the connection pressure cover.

[0011] Furthermore, a water outlet is provided at the bottom of the water tank.

[0012] Furthermore, a second annular ring is provided between the connecting gland and the tail cover plate.

[0013] The utility model provides an end sealing assembly for a slag extraction auger, comprising an equipment main shaft, the outer side of which is sequentially provided with an end cover plate, a water tank, a connecting pressure cover, and a tail cover plate from the medium end to the atmosphere end. A packing seal is provided on the side of the water tank close to the medium to block the medium, and a polytetrafluoroethylene sliding sleeve is provided on the side close to the atmosphere to replace the bearing in conventional technology. A water supply channel connected to the packing seal is provided on the side wall of the water tank, and clean water will lubricate the packing seal, while excess waste water and impurities will remain in the water storage chamber. Compared with bearings in conventional technology, the utility model can reduce the damage of the medium to the sealing assembly while ensuring the sealing ability of the tail end of the auger, thereby extending the service life of the entire sealing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the planar structure of a sealing assembly at the end of a slag lifting auger of the present invention;

[0015] Figure 2 This is a schematic diagram of the packing seal position on the medium side of the sealing component;

[0016] Figure 3 This is a schematic diagram of the position of the polytetrafluoroethylene sleeve on the atmosphere side of the sealing component.

[0017] Figure numerals: equipment main shaft 1, end cover plate 2, water tank 3, connecting cover 4, tail cover plate 5, first side wall 6, second side wall 7, water supply channel 8, water storage chamber 9, packing seal 10, packing pressure ring 11, polytetrafluoroethylene sleeve 12, water dividing ring 13, bushing 14, convex ring 15, first fastener 16, second fastener 17, third fastener 18, fourth fastener 19, water inlet 20, water outlet 21, first annular ring 22, second annular ring 23. DETAILED DESCRIPTION

[0018] like Figure 1The illustrated seal assembly for the end of a slag extraction auger is primarily used to seal the end of an auger used in the process of washing and extracting slag from chemical pulp chips. This prevents the leakage of wash water and debris from the auger's tail end, which can occur due to incomplete sealing in the prior art and shorten the bearing's service life. The seal assembly comprises a main shaft 1, with an end cover plate 2, a water tank 3, a connecting gland 4, and a tail cover plate 5 positioned along the outer side of the main shaft 1, sequentially extending from the medium end to the atmospheric end. The end cover plate 2 is provided with a first fastener 16 connected to the auger body, securing the entire seal assembly to the end of the auger.

[0019] The water tank 3 is an annular structure, including a water storage chamber 9 formed by a first side wall 6 close to the medium side and a second side wall 7 close to the atmosphere side. The first side wall 6 is provided with a second fastener 17 and is connected to the end cover plate 2 through the second fastener 17. A packing seal 10 is provided between the first side wall 6 and the main shaft 1 of the equipment, which can block dust particles leaking from the medium end. In this embodiment, a water replenishment channel 8 is provided along the radial direction of the first side wall 6. One end of the water replenishment channel 8 is connected to the side of the packing seal 10, and the other end is connected to the water injection port 20 provided on the outer wall of the water tank 3. Clean water is injected into the packing seal 10 through the water injection port 20. The clean water penetrates between the packing seal 10 and the main shaft 1 of the equipment to lubricate the packing seal 10, thereby reducing the friction between the packing seal 10 and the main shaft 1 of the equipment.

[0020] In this embodiment, the packing seals 10 are four groups extending axially along the main shaft 1 of the equipment. One end of the water injection channel connected to the packing seals 10 is located in the middle of the four groups of packing seals 10. A water dividing ring 13 is provided on the outside of the packing seals 10, and the injected clean water is dispersed into the packing seals 10 on both sides through the water dividing ring 13.

[0021] Furthermore, a first slot with one side opening is provided on the radially inner side of the first sidewall 6. Four sets of packing seals 10 are sequentially installed in the first slot. A packing pressure ring 11 is installed at the opening of the first slot. One side of the packing pressure ring 11 extends into the first slot and is fixed to the side of the first sidewall 6 via a third fastener 18. After tightening the third fastener 18, the packing pressure ring 11 applies a certain tightening pressure to the packing seal 10, maintaining the position of the packing seal 10 in the first slot and preventing the packing seal 10 from axially moving in the first slot during operation. Furthermore, a first annular ring 22 is installed between the first sidewall 6 and the end cover plate 2. The first annular ring 22 is located on the outside of the first sidewall 6 and applies inward tightening pressure to the first sidewall 6.

[0022] The packing seal 10 on the first side wall 6 blocks any granular medium and most liquid medium leaking from the upper portion of the auger. Fresh water and a small amount of liquid medium added through the water inlet 20 enter and remain within the water storage chamber 9 through the packing seal 10. The connecting gland 4 is located axially outward from the second side wall 7 and is connected to the second side wall 7 of the water tank 3 via a fourth fastener 19. Furthermore, a water outlet 21 is defined on the outer wall of the water tank 3, through which fresh water within the water tank 3 is discharged to the outside of the seal assembly.

[0023] A polytetrafluoroethylene (PTFE) sleeve 12 is mounted radially inward of the connection gland 4. Similar to a bearing in conventional technology, this sleeve 12 supports and guides the entire sealing assembly, ensuring the proper operation of the auger. This sleeve 12 provides a secondary barrier to leaking media. Due to the auger's tilted position, a small amount of liquid within the water storage chamber 9 flows along the main shaft 1 into the area where the polytetrafluoroethylene (PTFE) sleeve 12 is located. Compared to bearings, the polytetrafluoroethylene (PTFE) sleeve 12 is more corrosion-resistant, effectively resisting corrosion from liquid media and thus extending the life of the sealing assembly.

[0024] Furthermore, a second retaining groove is provided on the radially inner side of the connecting gland 4, into which the PTFE sleeve 12 is secured, thereby stabilizing the position of the PTFE sleeve 12. Furthermore, a bushing 14 is installed between the PTFE sleeve 12 and the device spindle 1. This bushing 14 has a certain degree of wear resistance and replaces the device spindle 1 in direct contact with the PTFE sleeve 12, thus preventing wear of the device spindle 1 due to friction with the PTFE sleeve 12. If the bushing 14 becomes unusable, only the worn bushing 14 can be replaced without replacing the entire device spindle 1.

[0025] The connecting gland 4 is used to secure the position of the PTFE sleeve 12. The tail cover 5 is located at the end of the entire sealing assembly and is fixedly mounted on the side of the connecting gland 4. The tail cover 5, connecting gland 4, water tank 3, and end cover 2 are sequentially assembled into a modular whole. A protruding ring 15 that extends into the second slot is provided at the end of the tail cover 5 near the connecting gland 4. When the tail cover 5 is tightened, the protruding ring 15 presses against the PTFE sleeve 12 from the side, further maintaining the position of the PTFE sleeve 12 within the second slot and reducing the axial offset of the PTFE sleeve 12. Furthermore, a second annular ring 23 is provided between the connecting gland 4 and the tail cover 5 to ensure the tightness of the connection between the two.

[0026] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A sealing assembly for the end of a slag extraction auger, characterized by: The invention comprises an equipment main shaft (1), wherein the outer side of the equipment main shaft (1) is provided with an end cover plate (2), a water tank (3), a connecting gland (4) and a tail cover plate (5) in sequence from the medium end to the atmosphere end, wherein the water tank (3) comprises a water storage chamber (9) formed by a first side wall (6) close to the medium side and a second side wall (7) close to the atmosphere side, a packing seal (10) is provided between the first side wall (6) and the equipment main shaft (1), and a water supply channel (8) connected to the packing seal (10) is provided on the first side wall (6) for providing lubricating water to the packing seal (10); and a polytetrafluoroethylene sliding sleeve (12) is installed between the radial inner side of the connecting gland (4) and the equipment main shaft (1).

2. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: The packing seals (10) are arranged in multiple groups along the axial direction of the main shaft (1) of the equipment. A water dividing ring (13) is arranged on the outside of the packing seals (10), and the water dividing ring (13) is arranged on the inside of the water supply channel (8).

3. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: A first groove with one side opening is provided on the radial inner side of the first side wall (6), and the packing seal (10) is sequentially installed in the first groove.

4. The end sealing assembly of a slag extraction auger according to claim 3, characterized in that: A packing pressure ring (11) is installed at the opening of the first slot, and one side of the packing pressure ring (11) extends into the first slot and is fixed to the side of the first side wall (6) through a third fastener (18).

5. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: A first annular ring (23) is installed between the first side wall (6) and the end cover plate (2).

6. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: A second slot is provided on the radial inner side of the connecting gland (4), and the polytetrafluoroethylene sliding sleeve (12) is engaged in the second slot.

7. The end sealing assembly of a slag extraction auger according to claim 6, characterized in that: A wear-resistant bushing (14) is installed between the polytetrafluoroethylene sliding sleeve (12) and the equipment main shaft (1).

8. The end sealing assembly of a slag extraction auger according to claim 6, characterized in that: The tail cover plate (5) is provided with a protruding ring (15) extending into the second clamping groove at one end close to the connection pressure cover (4).

9. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: A water outlet (21) is provided at the bottom of the water tank (3).

10. The end sealing assembly of a slag extraction auger according to claim 1, characterized in that: A second annular ring (24) is provided between the connecting gland (4) and the tail cover plate (5).

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