A dynamic sealing structure for a disc vacuum filter and a disc vacuum filter

Abstract

The utility model relates to disc type vacuum filter technical field, concretely is a kind of for the dynamic sealing structure and disc type vacuum filter of disc type vacuum filter. Dynamic sealing structure includes sealing assembly, and sealing assembly includes sealing sleeve, packing gland, packing barrel;The inner wall of packing barrel is sequentially provided with multiple packing roots and water seal ring along the axial direction;Water inlet and water outlet that are communicated with water seal ring are equipped on the position of packing barrel water seal ring, and sealing ring is arranged between water seal ring and packing root, and / or between water seal ring and sealing sleeve;Packing barrel is also equipped with the oil inlet for injecting lubricating medium. The sealing assembly that realizes dynamic sealing is equipped in the connecting place of the stirring unit of disc type vacuum filter and the sidewall of both ends of tank. Fluid is blocked by water seal ring, packing root provides close contact seal, and sealing ring carries out dynamic sealing, forms multistage dynamic sealing, greatly improves the sealing reliability of main shaft rotating part, prolongs the equipment life.

Description

Technical Field

[0001] This utility model relates to the field of disc vacuum filter technology, and in particular to a dynamic sealing structure for a disc vacuum filter and a disc vacuum filter. Background Technology

[0002] Disc vacuum filters are key equipment used in industries such as mineral processing, coal, chemical, and environmental protection for solid-liquid separation. Their basic principle is to utilize the pressure difference created by a vacuum pump on both sides of the filter medium, causing solid particles in the suspension to be trapped on the medium surface to form a filter cake, while the liquid permeates the medium and is pumped away, thus achieving separation and dehydration.

[0003] Traditional disc vacuum filters typically consist of a tank, a filter disc containing multiple fan-shaped filter elements, a drive shaft, a distribution head, a stirrer, and a discharge device. The filter disc rotates slowly under the drive, sequentially passing through the adsorption zone, the dehydration zone, and the discharge zone, completing a continuous cycle of filtration, dewatering, and discharge.

[0004] However, in practical applications, the existing dynamic sealing structure for disc vacuum filters and the disc vacuum filters themselves have some technical shortcomings that urgently need to be addressed: As the connecting hub between the rotating components and the stationary tank, the sealing performance at the connection between the mixing shaft and the tank wall is crucial. Traditional packing seals or simple mechanical seals are prone to failure due to wear after long-term operation, leading to leakage of slurry or filtrate from inside the tank. This not only pollutes the environment but may also damage critical components such as bearings, causing equipment downtime. Therefore, the reliability of the mixing shaft seal needs to be improved.

[0005] Therefore, there is an urgent need in this field to optimize the spindle seal in order to improve the problems existing in the sealing structure of disc vacuum filters. Utility Model Content

[0006] The purpose of this invention is to provide a dynamic sealing structure for a disc vacuum filter with better spindle sealing performance, and to provide a disc vacuum filter.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a dynamic sealing structure for a disc vacuum filter, comprising a sealing assembly, the sealing assembly including a sealing sleeve and a packing gland for being fitted onto a rotating shaft, and a packing cylinder fitted onto the outside of the sealing sleeve and the packing gland and not rotating with the rotating shaft; the inner wall of the packing cylinder is provided with multiple packing rings and water sealing rings sequentially along the axial direction; the packing cylinder is provided with an inlet and an outlet communicating with the water sealing rings; a sealing ring is provided between the water sealing ring and the packing rings, and / or between the water sealing ring and the sealing sleeve.

[0008] Preferably, the packing cylinder is also provided with an oil inlet for injecting lubricating medium.

[0009] Preferably, the end of the packing cylinder near the tank body is provided with a flexible flange and a fixed flange for fastening the packing cylinder.

[0010] Preferably, the number of packing rings is three and arranged sequentially; the number of sealing rings is three, one of which is located between the water sealing ring and the packing ring, and the other two are located between the water sealing ring and the sealing sleeve.

[0011] A disc-type vacuum filter includes a tank, a stirring unit located at the lower part of the tank, and a main shaft assembly located at the upper part of the tank. The main shaft assembly includes a main shaft with distribution heads installed at both ends. A plurality of axial filtrate pipes are uniformly arranged along the surface of the main shaft, and multiple filter disc assemblies are mounted on the main shaft. The main shaft assembly drives the filter disc assemblies to rotate within the tank. Each filter disc assembly includes a plurality of independent filter chambers and radial filtrate pipes communicating with the filter chambers. The outlets of the radial filtrate pipes are connected to the axial filtrate pipes. The tank is equipped with guide wheel assemblies to prevent the filter disc assemblies from deviating during rotation, a discharge assembly for discharging the filter cake, and a cleaning assembly for rinsing the filter chambers. Sealing assemblies for dynamic sealing are provided at the connection points between the stirring unit and the side walls at both ends of the tank.

[0012] Preferably, the stirring unit includes a stirring motor that provides power, a transmission sprocket driven by the stirring motor, a chain meshing with the transmission sprocket, a driven sprocket driven by the chain, a first shaft head coaxially connected to the driven sprocket, an intermediate shaft coaxially connected to the first shaft head, and a second shaft head coaxially connected to the intermediate shaft, wherein sealing components are provided between the first shaft head and the tank body, and between the second shaft head and the tank body.

[0013] Preferably, the spindle assembly further includes a spindle motor, a drive gear driven by the spindle motor, a spindle gear meshing with the drive gear to reduce speed and increase torque, and a spindle rotated by the spindle gear.

[0014] Preferably, the cleaning assembly includes a cleaning sub-pipe for conveying the cleaning medium and a cleaning head installed at the end of the cleaning sub-pipe for spraying the filter medium into the filter chamber.

[0015] Preferably, the tank includes a storage tank for storing materials, a feed tank connected to the storage tank, and a discharge channel located below the unloading assembly.

[0016] The beneficial effects of this invention are as follows: The core of this invention is that the sealing assembly adopts a multi-stage, multi-principle composite sealing structure. A fluid barrier is formed through a water-sealing ring, combined with multiple packing rings to provide a tight contact seal, further enhanced by the dynamic sealing effect of the sealing rings. This multi-layered sealing defense improves the reliability of the dynamic seal between the rotating shaft and the tank, effectively preventing leakage of slurry and filtrate, and protecting critical components such as internal bearings.

[0017] The water-sealing ring not only provides a seal, but the circulating water path formed by it, along with the inlet and outlet of the packing gland, continuously removes heat generated by friction and flushes the sealing area, effectively preventing particle accumulation and reducing the wear rate of the sealing element. Furthermore, the packing gland allows for easy adjustment of the packing gland's clamping force to compensate for normal wear during long-term operation, extending the service life of the entire sealing assembly, increasing maintenance intervals, and simplifying operation.

[0018] The sealing assembly is connected to the tank via flexible and fixed flanges. This design provides excellent alignment and error compensation, allowing it to adapt to minor vibrations and installation deviations of the spindle and ensuring stable sealing performance even under complex operating conditions. An oil inlet on the stuffing box allows for grease injection, further reducing friction and enhancing the seal. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of a disc vacuum filter is provided for this utility model; Figure 2 A front structural diagram of the disc vacuum filter proposed in this utility model is provided. Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the Y direction; Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure along the X direction; Figure 5 for Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 5 Enlarged structural diagram of the sealing assembly at point B; Explanation of reference numerals in the attached drawings: 1. Tank; 11. Feed trough; 111. Guide pipe; 12. Storage trough; 13. Discharge channel; 14. Discharge port; 15. Connecting through hole; 16. End flange; 2. Stirring unit; 21. Stirring motor; 22. Drive sprocket; 23. Chain; 24. Driven sprocket; 25. First shaft head; 251. First rotating flange; 252. Protrusion; 26. Intermediate shaft; 261. Second rotating flange; 262. Groove; 27. Stirring blade; 28. Second shaft head; 3. Main shaft assembly; 31. Main shaft motor; 32. Drive gear; 33. 1. Main shaft gear; 34. Main shaft; 35. Axial filtrate pipe; 4. Distribution head; 5. Filter disc assembly; 51. Filtration chamber; 52. Radial filtrate pipe; 6. Guide wheel assembly; 7. Discharge assembly; 8. Cleaning assembly; 81. Main cleaning pipe; 82. Branch cleaning pipe; 83. Cleaning head; 9. Sealing assembly; 91. Sealing sleeve; 92. Packing gland; 93. Sealing ring; 94. Packing cylinder; 941. Water inlet; 942. Oil inlet; 943. Sealing seat; 944. Water outlet; 95. Flexible flange; 96. Fixed flange; 97. Water sealing ring; 98. Packing. Detailed Implementation

[0020] A disc vacuum filter is a solid-liquid separation device. The filter disc assembly is driven by a motor and gears, causing it to rotate at a certain speed in a tank filled with slurry. In the adsorption zone, the pressure difference created by a vacuum pump on both sides of the filter medium causes the solid material to be adsorbed onto the medium (filter cloth) in the filter chamber, forming a filter cake. When this part of the filter disc assembly detaches from the slurry and enters the dewatering zone, the water in the filter cake is continuously separated from it under the suction force of the vacuum, and discharged through the filtrate pipe and distribution head, thus drying the filter cake. After passing through the discharge zone, the filter cake is unloaded from the filter disc by a back-blowing air and falls into the discharge chute, where it is transported away by a collection conveyor or other carrier. The entire operation is continuous. The rotating main shaft needs to penetrate the tank to agitate the material in the tank and prevent solid material from settling. However, as mentioned in the background art, there is also the problem of insufficient sealing performance at the connection between the agitating main shaft and the tank. Traditional packing seals show significant leakage after approximately 200-300 hours of continuous processing of highly abrasive slurry, with a leakage rate exceeding 95%. This necessitates frequent shutdowns to replace the seals, severely impacting continuous production.

[0021] The basic principle of vacuum filtration in filter chamber 51 is as follows: Under vacuum negative pressure (-0.04 to -0.07 MPa), water in the filtrate permeates through the medium (filter cloth) of filter chamber 51 into the internal channel of filter disc assembly 5 and is discharged through radial filtrate pipe 52. Solid particles are trapped by the medium (filter cloth) of filter chamber 51 to form a filter cake, thus achieving liquid-solid separation. If not stirred in time, particles in the slurry will settle at the bottom of storage tank 12, resulting in uneven slurry concentration within the tank and affecting filter cake formation. On the one hand, excessively low slurry concentration in contact with the filter medium affects cake formation; on the other hand, excessive particle sedimentation at the bottom increases the load on the stirring motor, potentially causing it to overload and trip, or even jam the stirring unit 2, affecting continuous and stable operation. The stirring unit 2 prevents solid particle sedimentation in the storage tank 12, ensuring uniform slurry concentration.

[0022] To address the problems mentioned in the background art, this utility model proposes a dynamic sealing structure for a disc vacuum filter and a disc vacuum filter, including a sealing assembly 9 for use on the filter. The sealing assembly 9 includes a sealing sleeve 91 and a packing gland 92 for being fitted onto a rotating shaft, and a packing cylinder 94 fitted outside the sealing sleeve 91 and the packing gland 92 and not rotating with the rotating shaft. Multiple packing rings 98 and water sealing rings 97 are sequentially arranged along the axial direction on the inner wall of the packing cylinder 94. The packing rings 98 are made of oil-impregnated graphite packing, which provides both sealing and lubrication. The packing cylinder 94 has an inlet 941 and an outlet 944 communicating with the water sealing rings 97. A sealing ring 93 is provided between the water sealing ring 97 and the packing rings 98, and / or between the water sealing ring 97 and the sealing sleeve 91. The packing cylinder 94 also has an oil inlet 942 for injecting lubricating medium. A flexible flange 95 and a fixed flange 96 for fastening the packing cylinder 94 are provided near the tank body 1. The preferred arrangement is that there are three packing rings 98 arranged in sequence; there are three sealing rings 93, one of which is located between the water sealing ring 97 and the packing ring 98, and the other two are located between the water sealing ring 97 and the sealing sleeve 91.

[0023] The filter tank 1 includes an upper feed tank 11, a storage tank 12, and a discharge channel 13; the storage tank 12 and the discharge channel 13 are independent and not connected, and the storage tank 12 has a discharge port 14 at its bottom. A stirring unit 2 is located at the lower part of the tank 1, and a main shaft assembly 3 is located at the upper part of the tank 1. Both ends of the main shaft assembly 3 are equipped with distribution heads 4, and at least one set of filter disc assemblies 5 is installed in the middle of the main shaft assembly 3. The stirring unit 2 is responsible for uniformly stirring the material in the storage tank 12 to prevent solid sedimentation. The main shaft assembly 3 drives the filter disc assemblies 5 on it to rotate within the storage tank 12. The main shaft assembly 3 includes a main shaft 34, with distribution heads 4 installed at both ends. Several axial filtrate pipes 35 are arranged on the side of the main shaft 34. Multiple filter disc assemblies 5 are installed in the middle of the main shaft 34; the main shaft assembly 3 drives the filter disc assembly 5 to rotate in the storage tank 12. The filter disc assembly 5 includes several independent filter chambers 51 and radial filtrate pipes 52 that communicate with the filter chambers 51; the outlet of the radial filtrate pipe 52 is connected to the axial filtrate pipe 35; the tank body 1 is equipped with a guide wheel assembly 6 to prevent the filter disc assembly 5 from rotating off-center, a discharge assembly 7 for discharging the filter cake, and a cleaning assembly 8 for rinsing the filter chambers 51.

[0024] like Figure 1 The diagram shows a stirring unit 2 comprising a stirring motor 21 providing power, a transmission sprocket 22 driven by the stirring motor 21, a chain 23 meshing with the transmission sprocket 22, a driven sprocket 24 driven by the chain 23, and a first shaft head 25 coaxially connected to the driven sprocket 24. The length direction of the first shaft head 25 is the X-axis, the length direction of the chain 23 is the Y-axis, and the vertical direction is the Z-axis. (X-axis cross-sectional view) Figure 4The diagram shows a first shaft head 25 coaxially connected to an intermediate shaft 26, and an intermediate shaft 26 coaxially connected to a second shaft head 28. The intermediate shaft 26 is located within the storage tank 12 and has several stirring blades 27 arranged regularly on it. The first shaft head 25, the intermediate shaft 26, and the second shaft head 28 form a three-section stirring shaft. The connection methods between the first shaft head 25 and the intermediate shaft 26, and between the intermediate shaft 26 and the second shaft head 28, are the same. Taking the first shaft head 25 and the intermediate shaft 26 as an example, the end of the first shaft head 25 that extends into the storage tank 12 is provided with a synchronously rotating first rotating flange 251, and the end of the intermediate shaft 26 near the first shaft head 25 is provided with a second rotating flange 261. The end face of the first rotating flange 251 is provided with an annular protrusion 252, and the end face of the second rotating flange 261 is provided with an annular groove 262 that matches the protrusion 252. The protrusion 252 and the groove 262 fit together to achieve coaxial positioning between the two shafts. The outer walls at both ends of the storage tank 12 are provided with connecting through holes 15 for the first shaft head 25 and the second shaft head 28 to pass through; the connecting through holes 15 are sealed by end face flanges 16 with openings in the middle. The bottom of the storage tank 12 is provided with a discharge port 14 for discharging material residue from the storage tank 12. The end face flanges 16 and the corresponding through first shaft head 25 and second shaft head 28 are all connected in a sealed rotational manner by sealing components 9, thereby achieving a dynamic seal at the connection between the stirring unit 2 and the side walls at both ends of the tank body 1. The specific structure of the sealing components 9 is described in... Figure 6 As shown in the image.

[0025] Figure 1 , Figure 2 , Figure 3 The diagram shows that the spindle assembly 3 also includes a spindle motor 31, a drive gear 32 driven by the spindle motor 31, a spindle gear 33 meshing with the drive gear 32 to reduce speed and increase torque, and a spindle 34 driven to rotate by the spindle gear 33. The spindle 34 is provided with several axial filter pipes 35, which are evenly distributed along the center of the spindle 34. In this embodiment, the axial filter pipes 35 are independent pipes, which facilitates later maintenance and replacement. The connected axial filter pipes 35 are connected by flexible hoses. The tank 1 is provided with a feed trough 11, which guides the material into the storage tank 12 through a guide pipe 111.

[0026] Figure 4 Section A shows the cleaning assembly 8, which is positioned above the feed trough 11. The cleaning assembly 8 includes a main cleaning pipe 81, a branch cleaning pipe 82, and several cleaning heads 83. The main cleaning pipe 81 is used to transport the cleaning medium. The branch cleaning pipe 82 is connected to the main cleaning pipe 81 and guides the cleaning medium to the filter disc assembly 5. The several cleaning heads 83 are installed on the branch cleaning pipe 82 to spray and rinse the filter medium in the filter chamber 51. The cleaning assembly 8 only operates when the equipment is not in use; it is turned off when the filter is operating.

[0027] like Figure 5 , Figure 6 As shown, the specific structure of the sealing assembly 9 is illustrated using the example of a sealed rotational connection between the first shaft head 25 and the end face flange 16. The sealing assembly 9 includes a sealing sleeve 91 fitted between the first shaft head 25 and the through hole of the end face flange 16, and packing glands 92 spaced apart from the sealing sleeve 91. The packing glands 92 are located away from the end face flange 16 and on the outside of the first shaft head 25. A packing cylinder 94 is fitted around the outside of the sealing sleeve 91 and the packing gland 92; the packing cylinder 94 presses down on one end of the packing gland 92; the outer wall of the packing cylinder 94 is provided with a water inlet 941, an oil inlet 942, and a water outlet 944. The water inlet 941... It is positioned opposite to the outlet 944; a packing 98, a water sealing ring 97 and a sealing ring 93 are provided between the sealing sleeve 91 and the packing gland 92, and the packing 98, the water sealing ring 97 and the sealing ring 93 are all located between the inner wall of the packing cylinder 94 and the first shaft head 25. A sealing seat 943 is provided at one end of the outer side of the packing cylinder 94 that presses against the packing gland 92, and the inner wall of the other end presses against the sealing sleeve 91. A flexible flange 95 and a fixed flange 96 are provided on the outer wall for connection with the end face flange 16.

[0028] Clean water (or coolant) is injected through the inlet 941 on the packing cylinder 94, with the water pressure slightly higher than the slurry pressure in the storage tank 12 (e.g., 0.3-0.5 MPa). The water flows through the water sealing ring 97 area, forming the first fluid barrier to prevent slurry particles from entering the sealing area. Simultaneously, the outlet 944 and inlet 941 are connected through the water sealing ring 97, allowing water to pass through and exit from the outlet 944. The water sealing ring 97 provides sealing pressure to the first shaft head 25 while also providing cooling. Grease is injected through the oil inlet 942 to lubricate the friction pair between the packing 98 and the shaft, reducing wear and enhancing the sealing effect. After the stirring unit 2 starts, the first shaft head 25 begins to rotate relative to the sealing assembly 9. The injected water forms a dynamic water curtain at the water sealing ring 97, isolating the slurry on one hand and cooling the sealing area on the other, creating a circulation that carries away frictional heat and any particles that may have intruded. Three packing rings 98 are tightly pressed between the sealing sleeve 91 and the packing gland 92, with the pressing force adjusted by the packing gland 92. The packing rings 98 are in close contact with the surface of the rotating shaft, forming the main sealing surface, achieving long-term effective sealing through elastic deformation and friction. Multiple sealing rings 93 (e.g., three) are arranged on both sides of the water sealing ring 97 to prevent water and oil leakage and slurry micro-seepage. The packing cylinder 94 is connected to the end face flange 16 via a flexible flange 95 and a fixed flange 96. The flexible flange 95 can compensate for installation errors and shaft vibration, ensuring stable alignment of the sealing assembly. The spaced arrangement of the sealing sleeve 91 and the packing gland 92, as well as the wrapping design of the packing cylinder 94, form a closed sealing chamber, enhancing the overall sealing reliability. During operation, the sealing status can be judged by observing the water quality at the outlet 944; if the outlet water is turbid, it may indicate that the internal seal has failed. Lubricating grease is added periodically through the oil inlet 942, and the pressing force of the packing rings 98 is adjusted by the packing gland 92 to compensate for wear.

[0029] Taking slurry as an example, the slurry enters the storage tank 12 through the feed trough 11. The stirring unit 2 is started, and the stirring motor 21 drives the first shaft head 25, intermediate shaft 26, and second shaft head 28 to rotate synchronously via the transmission sprocket 22, chain 23, and driven sprocket 24. This drives the stirring blades 27 to continuously and uniformly stir the slurry, preventing particulate matter from settling and ensuring that the slurry concentration in contact with the filter disc assembly 5 is consistent. The main shaft motor 31 is started, and through the meshing of the drive gear 32 and the main shaft gear 33, it drives the main shaft 34 and the filter disc assembly 5 to rotate slowly within the storage tank 12. Under negative pressure, the liquid is drawn away through the filter cloth, while solid particles are trapped, forming an initial filter cake on the surface of the filter chamber 51. The filter cake rotates with the filter disc to a position above the unloading assembly 7. Backflush gas (positive pressure) is introduced into the filter chamber 51 through the distribution head 4, causing the filter cake to separate from the filter cloth. Under the action of the backflush air, the filter cake is peeled off and falls along the unloading assembly 7 into the discharge channel 13, completing the discharge. The guide wheel assembly 6 constrains and guides the edges of the filter disc. Throughout the operation, the sealing assemblies 9 at both ends of the main shaft, through a multi-stage sealing structure of packing 98, water sealing ring 97, and sealing ring 93, effectively prevent leakage of slurry and filtrate from the gap between the rotating shaft and the tank.

[0030] This utility model provides a dynamic sealing structure for a disc vacuum filter and a disc vacuum filter itself. Through a multi-stage composite shaft sealing assembly, it solves key problems such as poor reliability of the main shaft seal in existing technologies. It utilizes a water sealing ring 97 for fluid isolation, a packing gland 98 for tight contact sealing, and a sealing ring 93 for dynamic sealing, forming a multi-stage dynamic seal. This significantly improves the sealing reliability of the rotating parts of the main shaft and extends the equipment's lifespan. Taking a mineral processing plant in Zhenjiang as an example, a 3-meter, 120-square-meter disc vacuum filter using this sealing assembly has not shown significant slurry leakage since its commissioning in August 2024. The application of this structure to disc vacuum filters significantly improves the operational stability of the disc vacuum filter while effectively reducing maintenance costs.

Claims

1. A dynamic sealing structure for a disc vacuum filter, characterized in that: The sealing assembly (9) includes a sealing sleeve (91) and a packing gland (92) for being fitted onto a rotating shaft, and a packing cylinder (94) fitted onto the outside of the sealing sleeve (91) and the packing gland (92) and not rotating with the rotating shaft; the inner wall of the packing cylinder (94) is provided with a plurality of packing rings (98) and water sealing rings (97) in sequence along the axial direction; the packing cylinder (94) is provided with an inlet (941) and an outlet (944) communicating with the water sealing rings (97); a sealing ring (93) is provided between the water sealing rings (97) and the packing rings (98), and / or between the water sealing rings (97) and the sealing sleeve (91).

2. The dynamic sealing structure according to claim 1, characterized in that: The stuffing box (94) is also provided with an oil inlet (942) for injecting lubricating medium.

3. The dynamic sealing structure according to claim 2, characterized in that: The packing cylinder (94) is provided with a flexible flange (95) and a fixed flange (96) for fastening the packing cylinder (94) at one end near the tank body (1).

4. The dynamic sealing structure according to claim 3, characterized in that: The number of packing rings (98) is three and arranged in sequence; the number of sealing rings (93) is three, one of which is located between the water sealing ring (97) and the packing ring (98), and the other two are located between the water sealing ring (97) and the sealing sleeve (91).

5. A disc vacuum filter, comprising a tank (1), a stirring unit (2) disposed at the lower part of the tank (1), and a main shaft assembly (3) disposed at the upper part of the tank (1), the main shaft assembly (3) comprising a main shaft (34), both ends of the main shaft (34) being equipped with distribution heads (4); a plurality of axial filtrate pipes (35) are uniformly disposed along the surface of the main shaft (34), and a plurality of filter disc assemblies (5) are mounted on the main shaft (34); the main shaft assembly (3) drives the filter disc assemblies (5) in the tank. (1) The filter disc assembly (5) rotates within the filter disc assembly (5), which includes several independent filter chambers (51) and radial filtrate pipes (52) communicating with the filter chambers (51); the outlet of the radial filtrate pipe (52) is connected to the axial filtrate pipe (35); the tank body (1) is equipped with a guide wheel assembly (6) to prevent the filter disc assembly (5) from deviating when rotating, a discharge assembly (7) for discharging the filter cake, and a cleaning assembly (8) for rinsing the filter chambers (51); characterized in that: The stirring unit (2) and the tank (1) are both provided with sealing components (9) to achieve dynamic sealing at the connection between the two side walls.

6. The disc vacuum filter according to claim 5, characterized in that: The stirring unit (2) includes a stirring motor (21) that provides power, a transmission sprocket (22) driven by the stirring motor (21), a chain (23) meshing with the transmission sprocket (22), a driven sprocket (24) driven by the chain (23), a first shaft head (25) coaxially connected to the driven sprocket (24), an intermediate shaft (26) coaxially connected to the first shaft head (25), and a second shaft head (28) coaxially connected to the intermediate shaft (26). Sealing components (9) are provided between the first shaft head (25) and the tank (1) and between the second shaft head (28) and the tank (1).

7. The disc vacuum filter according to claim 5, characterized in that: The spindle assembly (3) also includes a spindle motor (31), a drive gear (32) driven by the spindle motor (31), a spindle gear (33) meshing with the drive gear (32) to reduce speed and increase torque, and a spindle (34) driven to rotate by the spindle gear (33).

8. The disc vacuum filter according to claim 5, characterized in that: The cleaning assembly (8) includes a cleaning sub-pipe (82) for conveying the cleaning medium and a cleaning head (83) installed at the end of the cleaning sub-pipe (82) to spray the filter medium into the filter chamber (51).

9. The disc vacuum filter according to claim 5, characterized in that: The tank (1) includes a storage tank (12) for storing materials, a feed tank (11) connected to the storage tank (12), and a discharge channel (13) located below the unloading assembly (7).

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