Pulping apparatus

Abstract

The embodiment of the present application provides a pulping device, which comprises a cavity, a first rotating shaft, a first sealing assembly, a second rotating shaft and a second sealing assembly. The cavity is in a cylindrical shape and has a containing cavity. In the axial direction of the cavity, one side of the opposite sides of the cavity is provided with a first through hole and a second through hole. Part of the first rotating shaft extends into the containing cavity through the first through hole, and the first sealing assembly has a first sealing end face. Part of the second rotating shaft extends into the containing cavity through the second through hole, and in the axial direction of the second rotating shaft, the second sealing assembly has a second sealing end face and a third sealing end face arranged in sequence. The embodiment of the present application adopts single-end-face sealing and double-end-face sealing for different rotating shafts of the pulping device, so as to reduce the wear rate of the sealing surface between the sealing assembly and the rotating shaft and the material leakage rate of the pulping device, and further to ensure the efficient operation of the pulping device and increase the maintenance cycle of the pulping device.

Description

Technical Field

[0001] This application relates to the field of pulping, and more particularly to a pulping apparatus. Background Technology

[0002] Pulping equipment has wide applications in battery manufacturing, food, pharmaceuticals, coatings and inks, and other fields. The stirring shaft of the pulping equipment needs to be sealed to prevent pulp leakage and external environmental interference with the internal pulp. However, existing stirring shaft sealing treatments suffer from high frictional power consumption and high wear rate of the sealing surface, resulting in a high pulp leakage rate and frequent replacement and maintenance of the stirring shaft sealing structure. Utility Model Content

[0003] This application proposes a pulping device that reduces the wear rate of the sealing surface between the sealing component and the shaft and the leakage rate of the pulping device by adopting single-end face sealing and double-end face sealing for different rotating shafts, thereby ensuring the efficient operation of the pulping device and extending the maintenance cycle of the pulping device.

[0004] In a first aspect, embodiments of this application propose a pulping device, including a cavity, a first rotating shaft, a first sealing assembly, a second rotating shaft, and a second sealing assembly. The cavity is cylindrical and has a receiving cavity. Along the axial direction of the cavity, one of the opposite sides of the cavity is provided with a first through hole and a second through hole. A portion of the first rotating shaft extends into the receiving cavity through the first through hole. The first sealing assembly is fitted onto the circumferential side of the first rotating shaft and has a first sealing end face perpendicular to the axial direction of the first rotating shaft. A portion of the second rotating shaft extends into the receiving cavity through the second through hole, and the rotational speed of the second rotating shaft is greater than that of the first rotating shaft. The second sealing assembly is fitted onto the circumferential side of the second rotating shaft and has a second sealing end face and a third sealing end face arranged sequentially along the axial direction of the second rotating shaft. Both the second and third sealing end faces are perpendicular to the axial direction of the second rotating shaft.

[0005] This application incorporates a first rotating shaft, a second rotating shaft, a first sealing assembly, and a second sealing assembly within a pulping device. The second rotating shaft rotates at a higher speed than the first rotating shaft. The first sealing assembly has a first sealing end face to seal the lower-speed first rotating shaft, which helps control the end face clearance and reduces leakage. The second sealing assembly has a second and a third sealing end face to seal the higher-speed second rotating shaft. This dual end face sealing distributes the stronger pressure from the higher-speed second rotating shaft, reducing the end face specific pressure and thus lowering the wear rate of the second sealing assembly. All of these features contribute to ensuring efficient operation of the pulping device and extending its maintenance cycle.

[0006] In one possible implementation, the first sealing assembly includes a first stationary ring and a first rotating ring arranged sequentially along the axial direction of the first rotating shaft. The first stationary ring is detachably connected to a first anti-rotation pin in the cavity, and the first rotating ring is connected to the first rotating shaft. A first sealing end face is formed between the first stationary ring and the first rotating ring. The first rotating ring is movable relative to the first stationary ring so that when wear occurs on the sealing surface between the first stationary ring and the first rotating ring, i.e., when the end face gap of the first sealing end face widens, the first rotating ring compensates for the widened end face gap, restoring the first sealing end face to effectively isolate the first rotating shaft from the external environment.

[0007] In one possible implementation, the first sealing assembly further includes a first elastic element and a first mounting base. The first mounting base is connected to a first rotating shaft, and the opposite ends of the first elastic element are respectively connected to the first mounting base and a first rotating ring. Along the axial direction of the first rotating shaft, the first mounting base, the first elastic element, the first rotating ring, and the first stationary ring are arranged sequentially. The first elastic compensation mechanism formed by the first elastic element and the first mounting base can provide suitable pressure to the first rotating ring to precisely control the end face gap between the first rotating ring and the first stationary ring, which helps to reduce the leakage rate of the first sealing assembly.

[0008] In one possible implementation, the pulping device includes a first bearing sleeved on a first rotating shaft and positioned on the side of a first mounting base opposite to the first rotating ring. The first sealing assembly further includes a tensioning member and a support ring that abut against each other, with the support ring connecting the first bearing and the first mounting base. The tensioning member provides preload along the axial direction of the first rotating shaft, and its abutment with the support ring provides rigid support for the first bearing, thereby preventing separation of the first sealing end face due to gravity and contributing to a low leakage rate of the first sealing assembly.

[0009] In one possible implementation, the first stationary ring, the first rotating ring, the first elastic element, the first mounting base, the support ring, and the first bearing are sequentially arranged along the direction from the inside of the receiving cavity to the outside of the receiving cavity. Since the disassembly of the first sealing assembly needs to start from the first stationary ring, the embodiments of this application, by arranging the first stationary ring, the first rotating ring, the first elastic element, the first mounting base, the support ring, and the first bearing sequentially from the inside to the outside, can enable the remaining components of the first sealing assembly to be disassembled and replaced without altering the first bearing when replacing the first sealing assembly, which is beneficial for the maintenance of the pulping equipment.

[0010] In one possible implementation, the pulping equipment further includes a first housing, which, together with the outer shell of the cavity, forms a first protective space. A first sealing assembly is located within the first protective space. The first sealing assembly further includes a first stationary ring seat, to which the first stationary ring is detachably connected. The cavity, the first stationary ring seat, and the first housing are sequentially and detachably connected. The first protective space can be used to prevent external environmental interference to the first sealing assembly and the first rotating shaft, and provides a second layer of leakage protection for the pulp processed by the first rotating shaft.

[0011] In one possible implementation, the second sealing assembly includes a second stationary ring, a second rotating ring, a third rotating ring, and a third stationary ring arranged sequentially along the axial direction of the second rotating shaft. The second stationary ring is detachably connected to a second anti-rotation pin in the cavity, the second rotating ring is connected to the second rotating shaft, and a second sealing end face is formed between the second stationary ring and the second rotating ring. The third stationary ring is detachably connected to a third anti-rotation pin in the cavity, the third rotating ring is connected to the second rotating shaft, and a third sealing end face is formed between the third stationary ring and the third rotating ring. Because the second rotating shaft rotates at a high speed, it generates a significant amount of frictional heat, inducing vibration and potentially causing instability in the sealing surface fit. By forming two pairs of friction pairs—one between the second stationary ring and the second rotating ring, and the other between the third rotating ring and the third stationary ring—the total frictional heat can be shared, reducing the load on individual sealing end faces and helping to prevent sealing material failure due to overheating. Furthermore, the two pairs of friction pairs formed by the second stationary ring and the second rotating ring, and the third rotating ring and the third stationary ring, can maintain stable specific pressure between the second and third sealing end faces, thereby preventing end face separation or excessive wear due to pressure fluctuations and helping to reduce the leakage rate of the second sealing assembly.

[0012] In one possible implementation, the second sealing assembly further includes a second elastic element, a third elastic element, a second mounting base, and a third mounting base. Both the second and third mounting bases are connected to the second rotating shaft. The opposite ends of the second elastic element are connected to the second mounting base and the second rotating ring, respectively. The opposite ends of the third elastic element are connected to the third mounting base and the third rotating ring, respectively. Along the axial direction of the second rotating shaft, the second stationary ring, the second rotating ring, the second elastic element, the second mounting base, the third mounting base, the third elastic element, the third rotating ring, and the third stationary ring are arranged sequentially. The second elastic compensation mechanism formed by the second elastic element and the second mounting base can provide suitable pressure to the second rotating ring to precisely control the end-face gap between the second rotating ring and the second stationary ring. The third elastic compensation mechanism formed by the third elastic element and the third mounting base can provide suitable pressure to the third rotating ring to precisely control the end-face gap between the third rotating ring and the third stationary ring. Both of these factors contribute to reducing the leakage rate of the second sealing assembly.

[0013] In one possible implementation, the pulping equipment further includes a second bearing, which is sleeved on the second rotating shaft. Along the direction from the inside of the receiving cavity to the outside of the receiving cavity, a second stationary ring and a third stationary ring are sequentially arranged, with the second bearing located on the side of the third stationary ring opposite to the second stationary ring. Since disassembly of the second sealing assembly needs to start from the second stationary ring, by placing the second stationary ring on the media side and the third stationary ring on the atmospheric side, the remaining components of the second sealing assembly can be disassembled and replaced without altering the second bearing when replacing the second sealing assembly, which is beneficial for the maintenance of the pulping equipment.

[0014] In one possible implementation, the pulping equipment further includes a second housing, which, together with the outer shell of the cavity, forms a second protective space. A second sealing assembly is located within this second protective space. The second sealing assembly also includes a second stationary ring seat, to which the second stationary ring is detachably connected. The cavity and the second housing are sequentially and detachably connected. The second protective space serves to prevent external environmental interference with the second sealing assembly and the second shaft, and provides a third layer of leakage protection for the pulp acting on the second shaft. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pulping equipment provided in the embodiments of this application;

[0016] Figure 2 This is a schematic diagram of the mating structure between the first rotating shaft and the first sealing assembly provided in an embodiment of this application;

[0017] Figure 3 This is a schematic diagram of the mating structure between the second rotating shaft and the second sealing assembly provided in an embodiment of this application;

[0018] Figure 4 yes Figure 2 A schematic diagram of the local structure at point A is shown;

[0019] Figure 5 This is a schematic diagram of a partial mating structure between the second rotating shaft and the second sealing assembly provided in an embodiment of this application;

[0020] Figure 6 This is a schematic diagram of a partial mating structure between the second rotating shaft and the second sealing assembly provided in another embodiment of this application;

[0021] Figure 7 This is a schematic diagram of the mating structure of the second rotating shaft and the second sealing assembly provided in another embodiment of this application;

[0022] Figure 8 This is a schematic diagram of a partial mating structure between the second rotating shaft and the second sealing assembly provided in another embodiment of this application.

[0023] Figure label:

[0024] 1000 - Pulping equipment;

[0025] 100-First rotating shaft; L1-Axis of the first rotating shaft; 1-First sealing assembly; 10-First sealing end face; 11-First stationary ring; 12-First rotating ring; 13-First anti-rotation pin; 14-First elastic element; 15-First mounting base; 16-Support ring; 17-First stationary ring seat; 18-Tightening element;

[0026] 200 - Second rotating shaft; L2 - Axis of the second rotating shaft; 2 - Second sealing assembly; 20a - Second sealing end face; 20b - Third sealing end face; 21a - Second stationary ring; 22a - Second rotating ring; 22b - Third rotating ring; 21b - Third stationary ring; 23a - Second anti-rotation pin; 23b - Third anti-rotation pin; 24a - Second elastic element; 24b - Third elastic element; 25a - Second mounting base; 25b - Third mounting base; 26a - Second stationary ring seat; 26b - Third stationary ring seat; 27 - Third housing; 271 - Isolation cavity; 272 - First channel; 273 - Second channel;

[0027] 3-Third sealing assembly; 31-Main body; 311-First protrusion; 312-Second protrusion; 32-Fastener;

[0028] 300-Cavity; 3001-Receiving cavity; 3002-First through hole; 3003-Second through hole; 3004-Outer shell of the cavity; 400-First bearing; 500-First housing; 5001-First protective space; 600-Second bearing; 700-Second housing; 7001-Second protective space; 800-Third channel. Detailed Implementation

[0029] For ease of understanding, the relevant technical terms involved in the embodiments of this application will be explained and described below.

[0030] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more.

[0031] The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Features specified as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] The directional terms mentioned in the embodiments of this application, such as "upper," "lower," "front," "back," "left," "right," "inner," "outer," "side," "top," and "bottom," are only for reference to the directions in the accompanying drawings. These directional terms are used to better and more clearly explain and understand the embodiments of this application, and are not intended to explicitly or implicitly suggest that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, etc., and therefore should not be construed as limiting the embodiments of this application.

[0033] Pulping equipment has wide applications in battery manufacturing, food, pharmaceuticals, coatings and inks, and other fields. The stirring shaft of the pulping equipment needs to be sealed to prevent pulp leakage and external environmental interference with the internal pulp. However, existing stirring shaft sealing treatments suffer from high frictional power consumption and high wear rate of the sealing surface, resulting in a high pulp leakage rate and frequent replacement and maintenance of the stirring shaft sealing structure.

[0034] This application proposes a pulping device that reduces the wear rate of the sealing surface between the sealing component and the shaft and the leakage rate of the pulping device by adopting single-end face sealing and double-end face sealing for different rotating shafts, thereby ensuring the efficient operation of the pulping device and extending the maintenance cycle of the pulping device.

[0035] Figure 1 This is a schematic diagram of the structure of the pulping equipment 1000 provided in the embodiments of this application. Figure 2 This is a schematic diagram of the mating structure between the first rotating shaft 100 and the first sealing component 1 provided in an embodiment of this application. Figure 3 This is a schematic diagram of the mating structure between the second rotating shaft 200 and the second sealing component 2 provided in the embodiments of this application. Figure 1 , Figure 2 and Figure 3As shown, the pulping equipment 1000 includes a cavity 300, a first rotating shaft 100, a first sealing assembly 1, a second rotating shaft 200, and a second sealing assembly 2. The cavity 300 is cylindrical, and schematically, the cavity 300 can be a circulation tank. The cavity 300 has a receiving cavity 3001, which schematically can be a circulation cavity. Along the axial direction of the cavity 300, one of the opposite sides of the cavity 300 is provided with a first through hole 3002 and a second through hole 3003. Schematically, when the cavity 300 is placed vertically, the bottom shell of the cavity 300 is in contact with the bearing plane, and the top shell of the cavity 300, that is, the shell on the side of the cavity 300 facing away from the bearing plane, is provided with the first through hole 3002 and the second through hole 3003. A portion of the first rotating shaft 100 extends into the receiving cavity 3001 through the first through hole 3002, meaning that a portion of the first rotating shaft 100 is located inside the receiving cavity 3001, while the other portion is located outside the receiving cavity 3001. In one possible embodiment, the axis L1 of the first rotating shaft 100 coincides with the center line of the receiving cavity 3001, and the first through hole 3002 is symmetrical about the center line of the receiving cavity 3001. This prevents the first rotating shaft 100 from generating significant polarization force during rotation, which is beneficial to the stability of the cavity 300 during pulping operations.

[0036] Combination Figure 1 , Figure 2 and Figure 3 As shown, the first sealing component 1 is fitted onto the circumferential side of the first rotating shaft 100, that is, the first sealing component 1 surrounds the circumferential side of the first rotating shaft 100 360 degrees. Specifically, the first sealing component 1 can be used to fill the gap between the first rotating shaft 100 and the first through hole 3002 to isolate the slurry in the receiving cavity 3001 from the environment outside the receiving cavity 3001. The first sealing component 1 has a first sealing end face 10, which is perpendicular to the axis L1 direction of the first rotating shaft 100. Schematic, when the cavity 300 is placed vertically, the axis L1 direction of the first rotating shaft 100 is parallel to the vertical direction, and the first sealing end face 10 is parallel to the horizontal direction. The first rotating shaft 100 rotates at a low speed, for example, 200 rpm to 400 rpm. By using a first sealing assembly 1 with a first sealing end face 10 to seal the first rotating shaft 100 with a low rotational speed, the low rotational speed results in a low relative linear velocity of the first sealing end face 10. Furthermore, since only one sealing end face is in operation, the total amount of frictional heat generated is small. The lower speed and less frictional heat result in a smaller temperature rise of the first sealing end face 10 during operation, reducing the probability of the first sealing assembly 1 failing due to overheating, thus ensuring the long-term use of the first sealing assembly 1. Moreover, by using only one first sealing end face 10 for the first rotating shaft 100, the structure of the single sealing end face is simple, has a high degree of compatibility with the first rotating shaft 100, and is easy to control the end face gap of the first sealing end face 10, thereby reducing the leakage rate of the first rotating shaft 100.

[0037] Combination Figure 1 , Figure 2 and Figure 3 As shown, a portion of the second rotating shaft 200 extends into the receiving cavity 3001 through the second through hole 3003, meaning that a portion of the second rotating shaft 200 is located inside the receiving cavity 3001, while another portion is located outside the receiving cavity 3001. In one possible embodiment, the number of second rotating shafts 200 is at least two, and the at least two second rotating shafts 200 are symmetrically distributed about the center line of the receiving cavity 3001. The axis L1 of the first rotating shaft 100 coincides with the center line of the receiving cavity 3001, meaning that at least two second rotating shafts 200 are symmetrically distributed about the first rotating shaft 100. This ensures that the first rotating shaft 100 and the second rotating shaft 200 do not generate significant polarization forces when rotating, which is beneficial to the stability of the cavity 300 during pulping operations. The rotational speed of the second rotating shaft 200 is greater than that of the first rotating shaft 100. For illustration purposes, the rotational speed of the first rotating shaft 100 is lower, for example, 200 rpm-400 rpm, and the rotational speed of the second rotating shaft 200 is lower, for example, 900 rpm-1100 rpm. The second sealing assembly 2 is fitted onto the circumferential side of the second rotating shaft 200, that is, the second sealing assembly 2 surrounds the circumferential side of the second rotating shaft 200 360 degrees. Specifically, the second sealing assembly 2 can be used to fill the gap between the second rotating shaft 200 and the second through hole 3003 to isolate the slurry inside the receiving cavity 3001 from the environment outside the receiving cavity 3001. Along the axis L2 of the second rotating shaft 200, the second sealing assembly 2 has a second sealing end face 20a and a third sealing end face 20b arranged sequentially, both of which are perpendicular to the axis L2 of the second rotating shaft 200. The high rotational speed of the second shaft 200 results in a high relative linear velocity between the second sealing end face 20a and the third sealing end face 20b. The double-end-face seal of the second sealing end face 20a and the third sealing end face 20b can distribute the strong pressure brought by the high-speed second shaft 200, which helps to reduce the end-face specific pressure of the second sealing end face 20a and the third sealing end face 20b, thereby reducing the wear rate of the second sealing assembly 2. In summary, this embodiment of the application adopts a single-end-face seal for the first shaft 100 with a lower rotational speed and a double-end-face seal for the second shaft 200 with a higher rotational speed, in order to reduce the wear rate of the sealing surface between the sealing assembly and the shaft and the leakage rate of the pulping equipment 1000, thereby ensuring the efficient operation of the pulping equipment 1000 and extending the maintenance cycle of the pulping equipment 1000.

[0038] Figure 4 yes Figure 2 The schematic diagram of the local structure at point A shown, combined with... Figure 1 , Figure 2 and Figure 4As shown, in one possible implementation, the first sealing assembly 1 includes a first stationary ring 11 and a first rotating ring 12 arranged sequentially along the axis L1 of the first rotating shaft 100. Schematally, the first stationary ring 11 and the first rotating ring 12 are arranged sequentially in the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001. The first stationary ring 11 surrounds and encloses the circumferential surface of the first rotating shaft 100 by 360 degrees. The first stationary ring 11 is detachably connected to the first anti-rotation pin 13 of the cavity 300, so that the first stationary ring 11 can remain stationary, that is, when the first rotating shaft 100 rotates, the first stationary ring 11 is in a non-rotating state. The first rotating ring 12 is connected to the first rotating shaft 100, and the first rotating ring 12 surrounds and fits the circumferential surface of the first rotating shaft 100 by 360 degrees. The first rotating ring 12 can be used to rotate with the first rotating shaft 100. A first sealing end face 10 is formed between the first stationary ring 11 and the first rotating ring 12. The first sealing end face 10 can prevent the slurry in the receiving cavity 3001 from leaking out of the receiving cavity 3001 through the gap between the first rotating shaft 100 and the first stationary ring 11 and / or the first rotating ring 12, while preventing the external environment from interfering with the slurry in the receiving cavity 3001. Since the rotational speed of the first rotating shaft 100 is low, the total amount of frictional heat generated between the first stationary ring 11 and the first rotating ring 12 is small, resulting in a low temperature rise of the first sealing end face 10. This prevents the first stationary ring 11 and the first rotating ring 12 from failing due to overheating, which is beneficial to ensuring the long-term stable operation of the first sealing assembly 1. The first rotating ring 12 can be displaced along the axis L1 of the first rotating shaft 100 so that when wear occurs on the sealing surface between the first stationary ring 11 and the first rotating ring 12, that is, when the end face gap of the first sealing end face 10 widens, the first rotating ring 12 compensates for the widened end face gap, so that the first sealing end face 10 restores effective isolation between the first rotating shaft 100 and the external environment.

[0039] Combination Figure 1 , Figure 2 and Figure 4As shown, in one possible implementation, the first sealing assembly 1 further includes a first elastic element 14 and a first mounting base 15. The first mounting base 15 is connected to the first rotating shaft 100. The opposite ends of the first elastic element 14 are respectively connected to the first mounting base 15 and the first rotating ring 12, that is, the first elastic element 14 is located between the first mounting base 15 and the first rotating ring 12. Schematably, the first elastic element 14 can be a spring. Specifically, along the axis L1 of the first rotating shaft 100, the first mounting base 15, the first elastic element 14, the first rotating ring 12, and the first stationary ring 11 are arranged sequentially. Along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, the first stationary ring 11, the first rotating ring 12, the first elastic element 14, and the first mounting base 15 are arranged sequentially. The first elastic compensation mechanism formed by the first elastic element 14 and the first mounting base 15 can provide suitable pressure to the first rotating ring 12 to precisely control the end face gap between the first rotating ring 12 and the first stationary ring 11. For example, when wear occurs on the sealing surface between the first stationary ring 11 and the first rotating ring 12, i.e. the end face gap of the first sealing end face 10 widens, the first elastic compensation mechanism composed of the first elastic element 14 and the first mounting base 15 provides a thrust to the first rotating ring 12, causing the first rotating ring 12 to move toward the first stationary ring 11, thereby reducing the end face gap widening due to wear, i.e. compensating for the end face gap, so that the first sealing end face 10 restores effective isolation between the first rotating shaft 100 and the external environment, which is beneficial to reducing the leakage rate of the first sealing assembly 1.

[0040] Combination Figure 1 , Figure 2 and Figure 4 As shown, in one possible implementation, the pulping device 1000 includes a first bearing 400, which is sleeved on the first rotating shaft 100 and disposed on the side of the first mounting base 15 opposite to the first rotating ring 12. The first sealing assembly 1 also includes a tensioning member 18 and a support ring 16 that abut against each other, with the support ring 16 connecting the first bearing 400 and the first mounting base 15. Specifically, along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, the first stationary ring 11, the first rotating ring 12, the first elastic member 14, the first mounting base 15, the support ring 16, and the first bearing 400 are arranged sequentially. The tensioner 18 provides preload along the axial direction of the first rotating shaft 100, and abuts against the support ring 16, providing rigid support for the first bearing 400. This prevents separation of the first sealing end face 10 due to gravity, i.e., prevents the gap between the first stationary ring 11 and the first rotating ring 12 from increasing, maintaining the effective end face clearance of the first sealing end face 10, which is beneficial for achieving a low leakage rate of the first sealing assembly 1. Schematic, the mating structure of the tensioner 18 and the support ring 16 can be referred to as a lower tensioning structure.

[0041] Combination Figure 1 , Figure 2and Figure 4 As shown, in one possible implementation, the first stationary ring 11, the first rotating ring 12, the first elastic element 14, the first mounting base 15, the support ring 16, and the first bearing 400 are sequentially arranged along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001. That is, the first bearing 400 is further away from the bottom wall of the cavity 300 relative to the first sealing assembly 1. Since the disassembly of the first sealing assembly 1 needs to start from the first stationary ring 11, this embodiment of the application, by arranging the first stationary ring 11, the first rotating ring 12, the first elastic element 14, the first mounting base 15, the support ring 16, and the first bearing 400 sequentially from the inside to the outside, can make it possible to disassemble and replace the remaining parts of the first sealing assembly 1 without modifying the first bearing 400 when replacing the first sealing assembly 1, which is beneficial to the maintenance of the pulping equipment 1000. In another possible implementation, the first bearing 400, the first stationary ring 11, the first rotating ring 12, the first elastic element 14, the first mounting base 15, and the support ring 16 are sequentially arranged along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, that is, the first bearing 400 is closer to the bottom wall of the receiving cavity 3001 than the first sealing assembly 1. It should be noted that the position of the first bearing 400 relative to the first sealing assembly 1 can be determined according to actual needs, and this application does not limit it in this regard.

[0042] Combination Figure 1 , Figure 2 and Figure 4 As shown, in one possible embodiment, the pulping device 1000 further includes a first housing 500 located outside the receiving cavity 3001. The first housing 500 and the cavity 300 together form a first protective space 5001. Schematic, the first housing 500 and the outer housing 3004 of the cavity 300 together form the first protective space 5001. A first sealing assembly 1 is located in the first protective space 5001. The first sealing assembly 1 also includes a first stationary ring seat 17, to which a first stationary ring 11 is detachably connected. The first stationary ring seat 17 can be used to maintain the absolute stationary position of the first stationary ring 11, which is beneficial for the first moving ring 12 to dynamically compensate for the end face gap between itself and the first stationary ring 11. The cavity 300, the first stationary ring seat 17, and the first housing 500 are sequentially and detachably connected. Schematic, the outer housing 3004 of the cavity 300, the first stationary ring seat 17, and the first housing 500 are sequentially connected along the axial direction of the first rotating shaft 100 by bolts. The first protective space 5001 can be used to prevent the external environment from interfering with the first sealing assembly 1 and the first rotating shaft 100, and the first housing 500 provides a second leak-proof barrier for the slurry operated by the first rotating shaft 100.

[0043] Figure 5 This is a schematic diagram of a partial mating structure between the second rotating shaft 200 and the second sealing component 2 provided in an embodiment of this application. Figure 1, Figure 3 and Figure 5 As shown, in one possible embodiment, the second sealing assembly 2 includes a second stationary ring 21a, a second rotating ring 22a, a third rotating ring 22b, and a third stationary ring 21b arranged sequentially along the axis L2 of the second rotating shaft 200. The second stationary ring 21a surrounds the circumferential side of the second rotating shaft 200 at 360 degrees. The second stationary ring 21a is detachably connected to the second anti-rotation pin 23a of the cavity 300, so that the second stationary ring 21a can remain stationary, that is, when the second rotating shaft 200 rotates, the second stationary ring 21a is in a non-rotating state. The second rotating ring 22a is connected to the second rotating shaft 200 and surrounds and fits the circumferential side of the second rotating shaft 200 at 360 degrees. The second rotating ring 22a can be used to rotate with the second rotating shaft 200. A second sealing end face 20a is formed between the second stationary ring 21a and the second rotating ring 22a. The third stationary ring 21b surrounds the circumferential surface of the second rotating shaft 200 at 360 degrees. The third stationary ring 21b is detachably connected to the third anti-rotation pin 23b of the cavity 300, so that the third stationary ring 21b can remain stationary, that is, when the second rotating shaft 200 rotates, the third stationary ring 21b is in a non-rotating state. The third rotating ring 22b is connected to the second rotating shaft 200 and surrounds and fits the circumferential surface of the second rotating shaft 200 at 360 degrees. The third rotating ring 22b can be used to rotate with the second rotating shaft 200. A third sealing end face 20b is formed between the third stationary ring 21b and the third rotating ring 22b. Because the second rotating shaft 200 rotates at a high speed, it generates a lot of frictional heat and induces vibration, which can lead to instability in the sealing surface. Two pairs of friction pairs are formed by the second stationary ring 21a and the second rotating ring 22a, and the third rotating ring 22b and the third stationary ring 21b. These pairs can distribute the total frictional heat, reducing the load on individual sealing faces and helping to prevent sealing material failure due to overheating. Furthermore, the two pairs of friction pairs formed by the second stationary ring 21a and the second rotating ring 22a, and the third rotating ring 22b and the third stationary ring 21b, can maintain stable specific pressure on the second sealing face 20a and the third sealing face 20b, thereby preventing face separation or excessive wear due to pressure fluctuations and helping to reduce the leakage rate of the second sealing assembly 2.

[0044] Combination Figure 1 , Figure 3 and Figure 5As shown, in one possible embodiment, the second sealing assembly 2 further includes a second elastic element 24a, a third elastic element 24b, a second mounting base 25a, and a third mounting base 25b. Both the second mounting base 25a and the third mounting base 25b are connected to the second rotating shaft 200. The opposite ends of the second elastic element 24a are respectively connected to the second mounting base 25a and the second rotating ring 22a, and the opposite ends of the third elastic element 24b are respectively connected to the third mounting base 25b and the third rotating ring 22b. Schematic, both the second elastic element 24a and the third elastic element 24b can be springs. Along the axis L2 of the second rotating shaft 200, the second stationary ring 21a, the second rotating ring 22a, the second elastic element 24a, the second mounting base 25a, the third mounting base 25b, the third elastic element 24b, the third rotating ring 22b, and the third stationary ring 21b are arranged sequentially. The second elastic compensation mechanism, consisting of the second elastic element 24a and the second mounting base 25a, can provide suitable pressure to the second rotating ring 22a to precisely control the end face gap between the second rotating ring 22a and the second stationary ring 21a; the third elastic compensation mechanism, consisting of the third elastic element 24b and the third mounting base 25b, can provide suitable pressure to the third rotating ring 22b to precisely control the end face gap between the third rotating ring 22b and the third stationary ring 21b. Both of these are beneficial for reducing the leakage rate of the second sealing assembly 2.

[0045] Combination Figure 1 , Figure 3 and Figure 5 As shown, in one possible embodiment, the pulping device 1000 further includes a second bearing 600, which is sleeved on the second rotating shaft 200. Along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, a second stationary ring 21a and a third stationary ring 21b are sequentially arranged, i.e., the second stationary ring 21a is closer to the bottom of the cavity 300 than the third stationary ring 21b, and the second bearing 600 is located on the side of the third stationary ring 21b opposite to the second stationary ring 21a. Specifically, along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, the second stationary ring 21a, the second rotating ring 22a, the second elastic element 24a, the second mounting base 25a, the third mounting base 25b, the third elastic element 24b, the third rotating ring 22b, the third stationary ring 21b, and the second bearing 600 are sequentially arranged. Since the disassembly of the second sealing assembly 2 needs to start from the second stationary ring 21a, by positioning the second stationary ring 21a on the medium side, that is, the second stationary ring 21a is closer to the bottom of the cavity 300 and the slurry in the receiving cavity 3001 than the third stationary ring 21b, and positioning the third stationary ring 21b on the atmosphere side, that is, the third stationary ring 21b is farther away from the bottom of the cavity 300 and the slurry in the receiving cavity 3001 than the second stationary ring 21a, when replacing the second sealing assembly 2, the remaining parts of the second sealing assembly 2 can be disassembled and replaced without altering the second bearing 600, which is beneficial for the maintenance of the pulping equipment 1000.

[0046] Figure 6 This is a schematic diagram of a partial mating structure between the second rotating shaft 200 and the second sealing component 2, provided in another embodiment of this application. Figure 1 , Figure 3 and Figure 6 As shown, in one possible embodiment, the pulping device 1000 further includes a second housing 700 located outside the receiving cavity 3001. The second housing 700 and the cavity 300 together form a second protective space 7001. Schematic, the second housing 700 and the outer housing 3004 of the cavity 300 together form the second protective space 7001. A second sealing assembly 2 is located in the second protective space 7001. The second sealing assembly 2 also includes a second stationary ring seat 26a. A second stationary ring 21a is detachably connected to the second stationary ring seat 26a. The second stationary ring seat 26a can be used to maintain the absolute stationary position of the second stationary ring 21a, which is beneficial for the second moving ring 22a to dynamically compensate for the end face gap between it and the second stationary ring 21a. The cavity 300 and the second housing 700 are sequentially and detachably connected. Schematic, the outer housing 3004 of the cavity 300 and the second housing 700 are sequentially connected along the axial direction of the first rotating shaft 100 by bolts. The second protective space 7001 can be used to prevent the external environment from interfering with the second sealing assembly 2 and the second rotating shaft 200, and to provide a third leak-proof barrier for the slurry acted upon by the second rotating shaft 200. That is, when both the second sealing end face 20a and the third sealing end face 20b fail, the second housing 700 can also provide a third leak-proof barrier for the slurry acted upon by the second rotating shaft 200.

[0047] Figure 7 This is a schematic diagram of the mating structure between the second rotating shaft 200 and the second sealing assembly 2, provided in another embodiment of this application. (Combined with...) Figure 1 , Figure 3 , Figure 6 and Figure 7As shown, in one possible implementation, the second sealing assembly 2 further includes a third housing 27 and a third stationary ring seat 26b. The third stationary ring 21b is detachably connected to the third stationary ring seat 26b, which can be used to maintain the absolute stationary position of the third stationary ring 21b, facilitating dynamic compensation of the end face gap between the third rotating ring 22b and the third stationary ring 21b. The third housing 27, the second stationary ring seat 26a, the third stationary ring seat 26b, and the second rotating shaft 200 together form an isolation cavity 271. Schematically, the second housing 700 surrounds the third housing 27, that is, the third housing 27 is located within the second protective space 7001, and the isolation cavity 271 can be regarded as a subspace of the second protective space 7001. The second housing 700 has a first channel 272 and a second channel 273 communicating with the isolation cavity 271, that is, the first channel 272 penetrates the second housing 700 and the third housing 27, and the second channel 273 penetrates the second housing 700 and the third housing 27. The first channel 272 allows external insulating fluid to flow into the isolation chamber 271, and the second channel 273 allows external insulating fluid to flow out of the isolation chamber 271. In one possible embodiment, the second housing 700 also has a third channel 800, which can be used to discharge waste liquid and other debris. Figure 6 and Figure 7 As shown, exemplarily, the pulping equipment 1000 can adopt the P53 flushing scheme. The Plan 53A flushing scheme provides cleaning and isolating fluid to the second sealing assembly 2 through an external storage tank. The pressure of the isolating fluid in the tank is higher than the pressure of the sealed medium, and then it is circulated by a pump. Plan 53A has an external pressure source, built-in plate and pipe cooling, and is equipped with pressure, liquid level and other alarm indicators. The storage tank is pressurized by inert gas (usually nitrogen). The pressure of the isolating fluid is controlled by an external gas regulator. The pressure of the external sealing cavity is 0.14 to 0.17 MPa higher than the pressure of the sealed medium in the receiving cavity 3001. This embodiment employs a double-end-face seal of the high-speed rotating second shaft 200 using a second sealing end face 20a and a third sealing end face 20b, along with a corresponding isolation cavity 271 into which an isolation fluid is introduced. This ensures that the differential pressure load borne by the second stationary ring 21a, the second rotating ring 22a, the third stationary ring 21b, and the third rotating ring 22b is small, reducing the end-face specific pressure of the second sealing end face 20a and the third sealing end face 20b. This helps to reduce the wear rate of the second sealing end face 20a and the third sealing end face 20b. Furthermore, by constructing the isolation cavity 271 and introducing an isolation fluid into it, lubrication is provided for the second sealing end face 20a and the third sealing end face 20b, reducing friction and carrying away frictional heat, and isolating the slurry from the external environment.

[0048] Figure 8 This is a schematic diagram of a partial mating structure between the second rotating shaft 200 and the second sealing component 2, provided in another embodiment of this application. Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, in one possible embodiment, the pulping device 1000 further includes a third sealing assembly 3. Along the axis L2 of the second rotating shaft 200, the third sealing assembly 3, the second stationary ring 21a, the second rotating ring 22a, the third rotating ring 22b, and the third stationary ring 21b are sequentially arranged. Specifically, along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, the third sealing assembly 3, the second sealing assembly 2, and the second bearing 600 are sequentially arranged. Schematic, the third sealing assembly 3 is closer to the bottom of the cavity 300 or the pulp inside the receiving cavity 3001 than the second sealing assembly 2. Schematic, the third sealing assembly 3 can be an oil seal structure. The third sealing assembly 3 includes a body 31 and a fastener 32. The body 31 has a first protrusion 311 and a second protrusion 312, both of which are interference-fitted with the second rotating shaft 200. Specifically, along the direction from the inside of the receiving cavity 3001 to the outside of the receiving cavity 3001, the second protrusion 312, the first protrusion 311, the second stationary ring 21a, the second moving ring 22a, the third moving ring 22b, and the third stationary ring 21b are arranged sequentially. That is, the second protrusion 312 is closer to the bottom of the cavity 300 or the slurry inside the receiving cavity 3001 than the first protrusion 311. Schematic, the first protrusion 311 can be a secondary lip, and the second protrusion 312 can be a primary lip; both the first protrusion 311 and the second protrusion 312 can be made of rubber. The fastener 32 is disposed on the side of the main body 31 facing away from the second rotating shaft 200, that is, the main body 31 is located between the fastener 32 and the second rotating shaft 200. Fastener 32 is used to apply a clamping force to the body 31 radially along the second rotating shaft 200, so that the first protrusion 311 and the second protrusion 312 fit better with the second rotating shaft 200, which helps to reduce the leakage rate of the third sealing assembly 3. In this embodiment, by providing a third sealing assembly 3 including the body 31 and fastener 32 in the pulping equipment 1000, the third sealing assembly 3 can provide a fourth layer of leakage protection for the slurry acting on the second rotating shaft 200 on the medium side, and forms a tight double leakage protection structure with the second sealing assembly 2.

[0049] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pulping device, characterized in that, include: The cavity is cylindrical and has a receiving cavity. Along the axial direction of the cavity, one of the opposite sides of the cavity is provided with a first through hole and a second through hole. A first rotating shaft, a portion of which extends through the first through hole into the receiving cavity; A first sealing component is fitted onto the circumferential side of the first rotating shaft. The first sealing component has a first sealing end face, which is perpendicular to the axial direction of the first rotating shaft. The second rotating shaft, a portion of which extends into the receiving cavity through the second through hole, rotates at a speed greater than that of the first rotating shaft; The second sealing assembly is fitted onto the circumferential side of the second rotating shaft. Along the axial direction of the second rotating shaft, the second sealing assembly has a second sealing end face and a third sealing end face arranged in sequence. Both the second sealing end face and the third sealing end face are perpendicular to the axial direction of the second rotating shaft.

2. The pulping equipment according to claim 1, characterized in that, The first sealing assembly includes a first stationary ring and a first rotating ring arranged sequentially along the axial direction of the first rotating shaft. The first stationary ring is detachably connected to a first anti-rotation pin of the cavity, and the first rotating ring is connected to the first rotating shaft. The first sealing end face is formed between the first stationary ring and the first rotating ring.

3. The pulping equipment according to claim 2, characterized in that, The first sealing assembly further includes a first elastic element and a first mounting base. The first mounting base is connected to the first rotating shaft, and the opposite ends of the first elastic element are respectively connected to the first mounting base and the first rotating ring. Along the axial direction of the first rotating shaft, the first mounting base, the first elastic element, the first rotating ring, and the first stationary ring are arranged sequentially.

4. The pulping equipment according to claim 3, characterized in that, The pulping equipment includes a first bearing, which is sleeved on the first rotating shaft and disposed on the side of the first mounting base opposite to the first rotating ring; the first sealing assembly also includes a tensioning member and a support ring that abut against each other, and the support ring is connected between the first bearing and the first mounting base.

5. The pulping equipment according to claim 4, characterized in that, Along the direction from the inside of the receiving cavity to the outside of the receiving cavity, the first stationary ring, the first moving ring, the first elastic element, the first mounting base, the support ring, and the first bearing are arranged in sequence.

6. The pulping equipment according to claim 2, characterized in that, The pulping equipment further includes a first housing, which together with the outer shell of the cavity forms a first protective space, and the first sealing assembly is located in the first protective space; the first sealing assembly further includes a first stationary ring seat, which is detachably connected to the first stationary ring seat, and the cavity, the first stationary ring seat, and the first housing are detachably connected in sequence.

7. The pulping equipment according to claim 1, characterized in that, The second sealing assembly includes a second stationary ring, a second rotating ring, a third rotating ring, and a third stationary ring arranged sequentially along the axial direction of the second rotating shaft. The second stationary ring is detachably connected to a second anti-rotation pin in the cavity. The second rotating ring is connected to the second rotating shaft, and a second sealing end face is formed between the second stationary ring and the second rotating ring. The third stationary ring is detachably connected to a third anti-rotation pin in the cavity. The third rotating ring is connected to the second rotating shaft, and a third sealing end face is formed between the third stationary ring and the third rotating ring.

8. The pulping equipment according to claim 7, characterized in that, The second sealing assembly further includes a second elastic element, a third elastic element, a second mounting base, and a third mounting base. The second mounting base and the third mounting base are both connected to the second rotating shaft. The opposite ends of the second elastic element are respectively connected to the second mounting base and the second moving ring. The opposite ends of the third elastic element are respectively connected to the third mounting base and the third moving ring. Along the axial direction of the second rotating shaft, the second stationary ring, the second moving ring, the second elastic element, the second mounting base, the third mounting base, the third elastic element, the third moving ring, and the third stationary ring are arranged sequentially.

9. The pulping equipment according to claim 8, characterized in that, The pulping equipment also includes a second bearing, which is sleeved on the second rotating shaft in a direction from the inside of the receiving cavity to the outside of the receiving cavity. The second stationary ring and the third stationary ring are arranged in sequence, and the second bearing is located on the side of the third stationary ring opposite to the second stationary ring.

10. The pulping equipment according to claim 7, characterized in that, The pulping equipment further includes a second housing, which together with the outer shell of the cavity forms a second protective space. The second sealing assembly is located in the second protective space. The second sealing assembly further includes a second stationary ring seat, a third housing, and a third stationary ring seat. The second stationary ring is detachably connected to the second stationary ring seat. The cavity and the second housing are detachably connected in sequence. The third housing, the second stationary ring seat, the third stationary ring seat, and the second rotating shaft together form an isolation cavity. The second housing has a first channel and a second channel communicating with the isolation cavity. The first channel is used for external isolation liquid to flow into the isolation cavity, and the second channel is used for external isolation liquid to flow out of the isolation cavity.

Images