Shaft end sealing structure of polycrystalline silicon rake dryer and polycrystalline silicon rake dryer

Abstract

This utility model relates to the field of machinery and discloses a shaft end sealing structure for a polycrystalline silicon rake dryer and the polycrystalline silicon rake dryer itself. The sealing structure includes a sealing sleeve, sealing packing, and a gland assembly. The gland assembly includes an end cap and multiple extrusion structures connected between the end cap and the sealing sleeve. The multiple extrusion structures work together to ensure the stability and reliability of the shaft end seal, providing multiple guarantees and making the seal more fully and tightly compressed. This ensures the shaft end sealing structure remains sealed, reducing the likelihood of leakage and effectively enhancing its sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically to a shaft end sealing structure for a polycrystalline silicon rake dryer and the polycrystalline silicon rake dryer. Background Technology

[0002] A shaft end seal structure refers to a structure used at the end of a shaft to prevent leakage of liquids, gases, or solid substances from the shaft connection. In the operation of polycrystalline silicon rake dryers, shaft end seal structures are often required to mechanically seal the shaft end to avoid affecting product quality. For example, CN214534494U proposes a shaft end seal structure for a rake dryer, including a mechanical seal sleeve mounted on the main shaft. An outer structural component and a packing sleeve are installed on the outside of the mechanical seal sleeve. The sleeve portion of the mechanical seal sleeve corresponding to the outer structural component has a labyrinth seal section. Packing packing is filled between the packing sleeve and the mechanical seal sleeve. An adaptive clamping mechanism for real-time clamping of the packing packing is provided on the outside of the packing sleeve.

[0003] However, the adaptive clamping mechanism used in the existing technology mainly relies on the elastic action of the return spring for single compression sealing. However, relying on the elastic action of the return spring for real-time clamping has a relatively simple effect and is easily affected. During long-term use, the return spring will wear down, and its elasticity will decrease. Therefore, after the return spring wears down, the elasticity will weaken, resulting in a weaker real-time clamping effect of the packing. It is not easy to fully clamp the packing in real time, which can easily create gaps and make it less tight than initially, thus easily causing leakage. Therefore, there is an urgent need to improve the technology of the shaft end sealing structure to improve this equipment. Utility Model Content

[0004] The purpose of this invention is to overcome the problems in the prior art, such as the wear and tear of the reset spring and the decrease in elasticity, which leads to poor sealing effect. This invention provides a shaft end sealing structure for a polycrystalline silicon rake dryer. This structure, through a two-stage elastic compression structure, can ensure the stability and reliability of the shaft end seal and effectively enhance its sealing effect.

[0005] To achieve the above objectives, this utility model provides a shaft end sealing structure for a polycrystalline silicon rake dryer, including a sealing sleeve, sealing filler, and a gland assembly. The sealing sleeve is fitted onto a rotating component, which is the dryer shaft or a sealing sleeve fitted onto the dryer shaft and rotating with it. The rotating component is also fitted with a fixed component that does not rotate with the rotating component. One end of the sealing sleeve is fixedly connected to the fixed component, and the pressure cap assembly is placed on the other end of the sealing sleeve to seal the gap between the fixed component and the rotating component by filling the sealing filler in the cavity between the inner peripheral wall of the sealing sleeve and the outer peripheral wall of the rotating component. The capping assembly includes an end cap and a plurality of extrusion structures connected between the end cap and the sealing sleeve. Each extrusion structure includes a first elastic component and a second elastic component, such that each extrusion structure can provide the end cap with a dual elastic extrusion force toward the sealing sleeve.

[0006] The second aspect of this utility model provides a polycrystalline silicon rake dryer, which includes the shaft end sealing structure of the polycrystalline silicon rake dryer described in the first aspect of this utility model.

[0007] By adopting the above technical solution, this utility model ensures the stability and reliability of the shaft end seal through multiple compression sealing actions, adding multiple guarantees to the shaft end seal, making the seal compression more sufficient and tight, so that the shaft end seal structure is always in a sealed state, and it is not easy to cause leakage, effectively enhancing its sealing effect. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the shaft end sealing structure of the polycrystalline silicon rake dryer described in the specific implementation embodiment; Figure 2 This is a three-dimensional schematic diagram of the capping assembly described in the specific implementation method; Figure 3 This is a cross-sectional view of the meshing rolling assembly described in the specific implementation embodiment; Figure 4 This is a partial schematic diagram of the second elastic component described in the specific implementation embodiment; Figure 5 This is a three-dimensional schematic diagram of the compression and clamping structure described in the specific implementation method.

[0009] Explanation of reference numerals in the attached figures 1-Sealing sleeve; 2-Sealing packing; 3-Gland assembly; 4-Rotating component; 4a-Dryer shaft; 4b-Sealing bushing; 5-Fixing component; 6-End cap; 7-First elastic component; 8-Second elastic component; 9-Pressure plate; 10-Screw; 11-First spring; 12-First lock nut; 13-Second lock nut; 14-Fixing frame; 15-Modible plate; 16-Second spring; 17-Guide rod; 18-Guide groove; 19-Rack; 20-Gear; 21-Extrusion clamping structure; 22-Extrusion threaded component; 23-Buffer component; 24-Connecting plate; 25-Side frame; 26-Locking bolt; 27-Through hole; 28-Screw hole. Detailed Implementation

[0010] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0011] like Figures 1 to 5 As shown, this utility model provides a shaft end sealing structure for a polycrystalline silicon rake dryer, including a sealing sleeve 1, a sealing filler 2, and a pressure cap assembly 3. The sealing sleeve 1 is fitted onto a rotating component 4, which is either a dryer shaft 4a or a sealing sleeve 4b fitted onto the dryer shaft 4a and rotating with it. The rotating part 4 is also fitted with a fixed part 5 that does not rotate with the rotating part 4. One end of the sealing sleeve 1 is fixedly connected to the fixed part 5, and the pressure cap assembly 3 is covered on the other end of the sealing sleeve 1 to seal the gap between the fixed part 5 and the rotating part 4 by filling the sealing filler 2 in the cavity between the inner peripheral wall of the sealing sleeve 1 and the outer peripheral wall of the rotating part 4. The capping assembly 3 includes an end cap 6 and a plurality of extrusion structures connected between the end cap 6 and the sealing sleeve 1. Each extrusion structure includes a first elastic component 7 and a second elastic component 8, such that each extrusion structure can provide the end cap 6 with a dual elastic extrusion force toward the sealing sleeve 1.

[0012] In this utility model, it can be understood that the fixing part 5 refers to the part of the structure that is fixedly connected to the outer wall of the polycrystalline silicon rake dryer. It is the fixing part 5 that ensures that the sealing structure is firmly connected to the dryer body. The fixing part 5 can be, for example, the outer shell of the sealing structure that is fixedly connected to the end cover of the polycrystalline silicon rake dryer.

[0013] In this invention, preferably, the sealing sleeve 1 includes a pressure plate 9 adapted to the end cap 6, and each extrusion structure is connected between the end cap 6 and the pressure plate 9. By using the end cap 6 and the pressure plate 9 adapted to the end cap 6, the end cap 6 subjected to the elastic extrusion force of each extrusion structure can be sealed to the pressure plate 9. It can be understood that the adaptation of the end cap 6 and the pressure plate 9 mainly refers to the adaptation of their shapes and sizes so that they can be sealed.

[0014] According to some preferred embodiments, the end cap 6 and the pressure plate 9 are respectively provided with through holes. The first elastic component 7 includes a screw 10, a first lock nut 12, and a second lock nut 13 that pass through the through holes of the end cap 6 and the pressure plate 9 in sequence, and a first spring 11 fitted on the screw 10. The first lock nut 12 is locked on the screw 10 on the side of the end cap 6 away from the pressure plate 9, and the second lock nut 13 is locked on the screw 10 on the side of the pressure plate 9 away from the end cap 6. The first spring 11 is compressed between the end cap 6 and the first lock nut 12, and / or between the second lock nut 13 and the pressure plate 9.

[0015] In this invention, when the first elastic component 7 is subjected to external pressure, it can seal the end cap 6 and the pressure plate 9. At this time, the first spring 11 in the first elastic component 7 is in a compressed state, which further seals the end cap 6 and / or the pressure plate 9 under the restoring pressure of the first spring 11. The compressed state of the first spring 11 can include the following three situations: (1) Compressed between end cap 6 and first lock nut 12; (2) Compressed between second lock nut 13 and pressure plate 9; (3) Compressed simultaneously between end cap 6 and first lock nut 12 and between second lock nut 13 and pressure plate 9; It is understood that when the first spring 11 is in the (3) case, the number of first springs 11 can be multiple.

[0016] In this invention, preferably, the first spring 11 is compressed between the end cap 6 and the first locking nut 12, with one end fixedly connected to the end cap 6 and the other end abutting against the first locking nut 12; the second locking nut 13 abuts against the surface of the pressure plate 9 opposite to the end cap 6. The purpose of providing the first locking nut 12 and the second locking nut 13 is mainly to limit the compression and reset range of the first spring 11, so that the first elastic component 7 can accurately transmit the elastic compressive force to the end cap 6 or the pressure plate 9, thereby strengthening the seal between them.

[0017] In some other preferred embodiments, the second elastic component 8 includes a fixed frame 14, two movable plates 15, and two second springs 16; the fixed frame 14 is located on the side of the end cover 6 away from the pressure plate 9, with its middle part connected to the outer end face of the screw 10, and its two ends respectively connected to the end cover 6 through a movable plate 15; each movable plate 15 is provided with a compressed second spring 16 between its corresponding end and the fixed frame 14.

[0018] In this invention, after the second elastic component 8 is subjected to external pressure, it pushes the end cover 6 to seal with the pressure plate 9. At this time, the second spring 16 is compressed by external force, which in turn enables the reset squeezing force of the second spring 16 to push the movable plate 15 and the end cover 6 connected to the movable plate 15 to further seal with the pressure plate 9.

[0019] In this invention, preferably, the surface of the fixed frame 14 facing the movable plate 15 is provided with a guide rod 17 for mounting the second spring 16, and the surface of the movable plate 15 facing the fixed frame 14 is formed with a guide groove 18 for inserting the guide rod 17. The arrangement of the guide rod 17 and the guide groove 18 enables the second spring 16 and the movable plate 15 to move synchronously, thereby enhancing the ability of the movable plate 15 to transmit the reset pressure of the second spring 16.

[0020] like Figure 3As shown, in this invention, in a preferred embodiment, the second elastic component 8 further includes an engaging rolling component. The engaging rolling component includes a rack 19 mounted on the fixed frame 14 and a gear 20 fixedly connected to the movable plate 15. The gear 20 engages and rolls along the rack 19 when the movable plate 15 moves. Through the meshing connection between the gear 20 and the rack 19, the engaging rolling component enables the movable plate 15 to withstand a large load and maintain its stability, thereby preventing the end cap 6 connected to it from loosening and ensuring the sealing of the end cap 6 or the pressure plate 9.

[0021] like Figure 4 As shown, in this utility model, in a preferred embodiment, the fixed frame 14 includes a connecting plate 24 and two side frames 25. The two side frames 25 are respectively connected to both ends of the connecting plate 24 to form a U-shape, and the side frames 25 are connected to the movable plate 15. The connecting plate 24 is provided with a locking bolt 26, which passes through a through hole 27 on the connecting plate 24 and connects to a screw hole 28 on the outer end face of the screw 10. Connecting the connecting plate 24 and the screw 10 by a threaded connection ensures the stability of the connection between the first elastic component 7 and the second elastic component 8.

[0022] like Figure 5 As shown, in this utility model, in a preferred embodiment, a pressing and clamping structure 21 is provided between the connecting plate 24 and the first lock nut 12. The pressing and clamping structure 21 includes at least one pressing threaded component 22. Each pressing threaded component 22 is threadedly connected to the connecting plate 24 and has one end abutting against the first lock nut 12 to prevent the first lock nut 12 from moving in a direction away from the first spring 11. The aforementioned pressing threaded component 22 can abut against the first lock nut 12 through a buffer component 23, making it less likely for the first lock nut 12 to loosen during rotation, thereby avoiding affecting the reset pressing of the first spring 11 and ensuring the stability and reliability of the reset pressing of the first spring 11. Preferably, the buffer component 23 can be a disc-shaped structure.

[0023] In this invention, preferably, a sealing ring is provided between the movable plate 15 and the through hole 27 to reduce the entry of dust and enhance the sealing and dustproof effect.

[0024] In this invention, preferably, the dryer includes the polycrystalline silicon rake dryer shaft end sealing structure described in the first aspect of this invention.

[0025] The present invention will be described in detail below through embodiments, but the scope of protection of the present invention is not limited thereto.

[0026] Example 1 This embodiment illustrates a shaft end sealing structure for a polycrystalline silicon rake dryer, such as... Figures 1 to 5 As shown, it includes: The sealing sleeve 1, sealing filler 2, and gland assembly 3 are provided. The sealing sleeve 1 is fitted onto a rotating component 4, which is a sealing bushing 4b fitted onto a dryer shaft 4a and rotating with it. A fixing component 5 that does not rotate with the rotating component 4 is also fitted onto the rotating component 4. One end of the sealing sleeve 1 is fixedly connected to the fixing component 5, and the gland assembly 3 is placed over the other end of the sealing sleeve 1. The gland assembly 3 includes an end cap 6 and a first elastic component 7 and a second elastic component 8 connected between the end cap 6 and the sealing sleeve 1. The sealing sleeve 1 includes a pressure plate 9 that is adapted to the end cap 6. The end cap 6 and the pressure plate 9 are provided with corresponding through holes. The first elastic component 7 includes a screw 10, a first lock nut 12, and a second lock nut 13 that pass through the through holes of the end cover 6 and the pressure plate 9 in sequence, and a first spring 11 fitted on the screw 10. The first lock nut 12 is locked to the screw 10 on the side of the end cover 6 away from the pressure plate 9, and the second lock nut 13 is locked to the screw 10 on the side of the pressure plate 9 away from the end cover 6. The first spring 11 is compressed between the end cover 6 and the first lock nut 12, with one end fixedly connected to the end cover 6 and the other end abutting against the first lock nut 12. The second lock nut 13 abuts against the surface of the pressure plate 9 on the side away from the end cover 6. The second elastic component 8 includes a fixed frame 14, two movable plates 15, and two second springs 16. The fixed frame 14 is located on the side of the end cover 6 away from the pressure plate 9, with its middle part connected to the outer end face of the screw 10, and its two ends connected to the end cover 6 through a movable plate 15. A compressed second spring 16 is provided between the corresponding end of each movable plate 15 and the fixed frame 14. A guide rod 17 for sleeved on the surface of the fixed frame 14 facing the movable plate 15 is provided, and a guide groove 18 for the guide rod 17 to be inserted is formed on the surface of the movable plate 15 facing the fixed frame 14.

[0027] The second elastic component 8 also includes an engagement rolling component, which includes a rack 19 disposed on the fixed frame 14 and a gear 20 fixedly connected to the movable plate 15. The gear 20 engages and rolls along the rack 19 when the movable plate 15 moves. The fixed frame 14 includes a connecting plate 24 and two side frames 25. The two side frames 25 are respectively connected to the two ends of the connecting plate 24 to form a U-shape. The side frames 25 are connected to the movable plate 15. The connecting plate 24 is provided with a locking bolt 26. The locking bolt 26 passes through the through hole 27 on the connecting plate 24 and is connected to the screw hole 28 on the outer end face of the screw rod 10. A pressing and clamping structure 21 is provided between the connecting plate 24 and the first lock nut 12. The pressing and clamping structure 21 includes at least one pressing threaded part 22. Each pressing threaded part 22 is threaded to the connecting plate 24 and one end abuts against the first lock nut 12 to prevent the first lock nut 12 from moving in the direction away from the first spring 11.

[0028] As can be seen, this utility model ensures the stability and reliability of the shaft end sealing structure through multiple compression sealing actions, adding multiple guarantees to the shaft end sealing structure, making the sealing compression more sufficient and tight, so that the shaft end sealing structure is always in a sealed state and is not prone to leakage, effectively enhancing the sealing effect of the shaft end sealing structure of the polycrystalline silicon rake dryer.

[0029] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, including combining the various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed by this utility model and are all within the protection scope of this utility model.

Claims

1. A shaft end sealing structure for a polycrystalline silicon rake dryer, characterized in that, It includes a sealing sleeve (1), a sealing filler (2), and a gland assembly (3). The sealing sleeve (1) is fitted onto a rotating component (4). The rotating component (4) is the dryer shaft (4a) or a sealing bushing (4b) fitted onto the dryer shaft (4a) and rotating with it. The rotating part (4) is also fitted with a fixed part (5) that does not rotate with the rotating part (4). One end of the sealing sleeve (1) is fixedly connected to the fixed part (5). The pressure cap assembly (3) is placed on the other end of the sealing sleeve (1) to make the sealing filler (2) seal and fill the cavity between the inner peripheral wall of the sealing sleeve (1) and the outer peripheral wall of the rotating part (4) to seal the gap between the fixed part (5) and the rotating part (4). The cap assembly (3) includes an end cap (6) and a plurality of extrusion structures connected between the end cap (6) and the sealing sleeve (1), each of the extrusion structures including a first elastic component (7) and a second elastic component (8) such that each of the extrusion structures can provide the end cap (6) with a dual elastic extrusion force toward the sealing sleeve (1).

2. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 1, characterized in that, The sealing sleeve (1) includes a pressure plate (9) adapted to the end cap (6), and each of the extrusion structures is connected between the end cap (6) and the pressure plate (9).

3. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 2, characterized in that, The end cap (6) and the pressure plate (9) are respectively provided with through holes. The first elastic component (7) includes a screw (10), a first lock nut (12), and a second lock nut (13) that pass through the through holes of the end cap (6) and the pressure plate (9) in sequence, and a first spring (11) fitted on the screw (10). The first lock nut (12) is locked on the screw (10) on the side of the end cap (6) away from the pressure plate (9), and the second lock nut (13) is locked on the screw (10) on the side of the pressure plate (9) away from the end cap (6). The first spring (11) is compressed between the end cap (6) and the first lock nut (12), and / or between the second lock nut (13) and the pressure plate (9).

4. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 3, characterized in that, The first spring (11) is compressed between the end cap (6) and the first lock nut (12), with one end fixedly connected to the end cap (6) and the other end abutting against the first lock nut (12); the second lock nut (13) abuts against the side surface of the pressure plate (9) away from the end cap (6).

5. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 4, characterized in that, The second elastic component (8) includes a fixed frame (14), two movable plates (15) and two second springs (16); the fixed frame (14) is located on the side of the end cover (6) away from the pressure plate (9), the middle part is connected to the outer end face of the screw (10), and its two ends are respectively connected to the end cover (6) through a movable plate (15); each movable plate (15) and the corresponding end of the fixed frame (14) are provided with a compressed second spring (16).

6. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 5, characterized in that, The fixed frame (14) has a guide rod (17) for mounting the second spring (16) on the surface facing the movable plate (15), and the movable plate (15) has a guide groove (18) for inserting the guide rod (17) on the surface facing the fixed frame (14).

7. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 5, characterized in that, The second elastic component (8) further includes an engagement rolling component, which includes a rack (19) disposed on the fixed frame (14) and a gear (20) fixedly connected to the movable plate (15). The gear (20) engages and rolls along the rack (19) when the movable plate (15) moves.

8. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 5, characterized in that, The fixed frame (14) includes a connecting plate (24) and two side frames (25). The two side frames (25) are respectively connected to the two ends of the connecting plate (24) to form a U-shape. The side frames (25) are connected to the movable plate (15). The connecting plate (24) is provided with a locking bolt (26). The locking bolt (26) passes through the through hole (27) on the connecting plate (24) and is connected to the screw hole (28) on the outer end face of the screw (10).

9. The shaft end sealing structure of the polycrystalline silicon rake dryer according to claim 8, characterized in that, A pressing and clamping structure (21) is provided between the connecting plate (24) and the first lock nut (12). The pressing and clamping structure (21) includes at least one pressing threaded part (22). Each pressing threaded part (22) is threaded to the connecting plate (24) and one end abuts against the first lock nut (12) to prevent the first lock nut (12) from moving in a direction away from the first spring (11).

10. A polycrystalline silicon rake dryer, characterized in that, The dryer includes the shaft end sealing structure of the polycrystalline silicon rake dryer as described in any one of claims 1-9.

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