Ship tail shaft sealing device capable of being automatically adjusted

Abstract

The utility model relates to the technical field of sealing devices, and discloses a marine stern shaft sealing device capable of being automatically adjusted, which solves the problems that an existing sealing device cannot be automatically adjusted and compensated according to the axial movement of a stern shaft and is poor in sealing effect, and comprises a sealing end cover, a tail shaft body is rotationally installed in the sealing end cover, a first installation box is fixedly installed on the upper portion of one end of the sealing end cover, a second installation box is fixedly installed on the upper portion of the other end of the sealing end cover, a first disc is fixedly installed on the surface of one end of the tail shaft body, and a second disc is fixedly installed on the surface of the other end of the tail shaft body. A first ring groove is formed in one side of the interior of the sealing end cover, a first hollow sealing ring is fixedly mounted in the first ring groove, a second ring groove is formed in the other side of the interior of the sealing end cover, and a second hollow sealing ring is fixedly mounted in the second ring groove; the sealing device can automatically adjust and compensate the tail shaft according to the axial movement of the tail shaft, so that the sealing effect of the tail shaft is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing devices, and particularly relates to a marine stern shaft sealing device capable of automatic adjustment. Background Technique

[0002] The stern shaft, also known as the tail shaft, is the last section of the shafting. The flange at the head end is connected to the flange of the intermediate shaft with closely fitted bolts. The tail end is conical for installing the propeller. The stern shaft is forged from high-quality carbon steel. During the operation of the stern shaft, sealing is required, so a sealing device needs to be used. During the operation of the stern shaft, small axial movements will occur, resulting in gaps at the contact surface with the sealing ring, making it easy for seawater to enter.

[0003] The existing sealing device cannot automatically adjust and compensate according to the axial movement of the stern shaft, and its sealing effect is not good. Content of the Utility Model

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a marine stern shaft sealing device capable of automatic adjustment, effectively solving the problem that the existing sealing device cannot automatically adjust and compensate according to the axial movement of the stern shaft, and its sealing effect is not good.

[0005] To achieve the above object, the utility model provides the following technical solution: A marine stern shaft sealing device capable of automatic adjustment, including a sealing end cover. The stern shaft body is rotatably installed inside the sealing end cover. The upper part of one end of the sealing end cover is fixedly installed with a first installation box, and the upper part of the other end of the sealing end cover is fixedly installed with a second installation box. A first disc is fixedly installed on the surface of one end of the stern shaft body, and a second disc is fixedly installed on the surface of the other end of the stern shaft body. A first circular groove is opened on one side inside the sealing end cover, and a first hollow sealing ring is fixedly installed inside the first circular groove. A second circular groove is opened on the other side inside the sealing end cover, and a second hollow sealing ring is fixedly installed inside the second circular groove. A first airbag is fixedly installed on one side inside the first installation box, and a second airbag is fixedly installed on one side inside the second installation box. One end of the first airbag close to the first hollow sealing ring is fixedly installed with a first air nozzle, and one end of the first air nozzle is fixedly installed with a first air pipe. The first air pipe extends into the first circular groove and is fixedly connected to the first hollow sealing ring. One end of the second airbag close to the second hollow sealing ring is fixedly installed with a second air nozzle, and one end of the second air nozzle is fixedly installed with a second air pipe. One end of the second air pipe extends into the second circular groove and is fixedly connected to the second hollow sealing ring. An automatic adjustment and compensation component is provided between the inside of the first installation box and the second installation box.

[0006] Preferably, the automatic adjustment and compensation component includes two fixed sleeves, which are fixedly installed in the middle of the mutually remote sides of the first installation box and the second installation box. A moving rod is inserted into each of the two fixed sleeves. One end of each of the two moving rods extends into the first installation box and the second installation box respectively and is fixedly installed with a mounting block. A pushing plate is fixedly installed on one side of each of the two mounting blocks close to each other, and the two pushing plates are respectively in contact with the first airbag and the second airbag.

[0007] Preferably, support rods are fixedly installed on the upper and lower sides of each of the two mounting blocks. One end of each support rod is fixedly installed with a sliding sleeve. A sliding rod is inserted into each sliding sleeve. One end of each sliding rod is fixedly connected to the inner wall of the first installation box and the second installation box respectively. A fixed disk is fixedly installed on one side of the surface of each sliding rod, and a spring is arranged in the middle of the surface of each sliding rod. Both ends of the spring are fixedly connected to the sliding sleeve and the fixed disk respectively.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows: when the stern shaft body axially moves, it will reciprocally push the two moving rods through the first disk and the second disk. When the two moving rods are pushed, they will move inward along the fixed sleeves. When the two moving rods move inward, they will drive the mounting blocks to move inward. When the mounting blocks move, they will drive the sliding sleeves to slide along the surface of the sliding rods through the support rods and simultaneously compress the springs. The springs can push the two moving rods to reset through their own elastic force. When the mounting blocks move inward, they will drive the pushing plates to squeeze the first airbag and the second airbag;

[0009] Thereby, the gases inside the first airbag and the second airbag are respectively squeezed into the first air pipe and the second air pipe through the first air nozzle and the second air nozzle. The gases inside the first air pipe and the second air pipe will respectively enter the first hollow sealing ring and the second hollow sealing ring, so that the first hollow sealing ring and the second hollow sealing ring expand and tightly adhere to the stern shaft body, thereby ensuring the sealing effect; enabling this sealing device to automatically adjust and compensate for the axial movement of the stern shaft, thereby ensuring its sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model.

[0011] In the drawings:

[0012] Figure 1 is a schematic structural diagram of a marine stern shaft sealing device that can be automatically adjusted according to the present utility model;

[0013] Figure 2 is a schematic internal structure diagram of the sealing end cover of the present utility model;

[0014] Figure 3 is a partial enlarged structural schematic diagram of the present utility model Figure 2 ;

[0015] Figure 4 is an enlarged structural schematic diagram of part A in the present utility model Figure 2 ;

[0016] In the figure: 1, sealing end cover; 2, stern shaft body; 3, first installation box; 4, second installation box; 5, first disc; 6, second disc; 7, first annular groove; 8, first hollow sealing ring; 9, second annular groove; 10, second hollow sealing ring; 11, first airbag; 12, second airbag; 13, first air nozzle; 14, first air pipe; 15, second air nozzle; 16, second air pipe; 17, fixed sleeve; 18, moving rod; 19, pushing plate; 20, mounting block; 21, support rod; 22, sliding sleeve; 23, sliding rod; 24, fixed disc; 25, spring. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] From Figures 1 to 4Given that, the utility model includes a sealing end cover 1, inside which a stern shaft body 2 is rotatably installed. At the upper part of one end of the sealing end cover 1, a first mounting box 3 is fixedly installed, and at the upper part of the other end of the sealing end cover 1, a second mounting box 4 is fixedly installed. On the surface of one end of the stern shaft body 2, a first disc 5 is fixedly installed, and on the surface of the other end of the stern shaft body 2, a second disc 6 is fixedly installed. On one side inside the sealing end cover 1, a first circular groove 7 is formed, and inside the first circular groove 7, a first hollow sealing ring 8 is fixedly installed. On the other side inside the sealing end cover 1, a second circular groove 9 is formed, and inside the second circular groove 9, a second hollow sealing ring 10 is fixedly installed. On one side inside the first mounting box 3, a first airbag 11 is fixedly installed, and on one side inside the second mounting box 4, a second airbag 12 is fixedly installed. One end of the first airbag 11 close to the first hollow sealing ring 8 is fixedly installed with a first air nozzle 13, and one end of the first air nozzle 13 is fixedly installed with a first air pipe 14. The first air pipe 14 extends into the first circular groove 7 and is fixedly connected to the first hollow sealing ring 8. One end of the second airbag 12 close to the second hollow sealing ring 10 is fixedly installed with a second air nozzle 15, and one end of the second air nozzle 15 is fixedly installed with a second air pipe 16. One end of the second air pipe 16 extends into the second circular groove 9 and is fixedly connected to the second hollow sealing ring 10. An automatic adjustment and compensation component is provided between the interiors of the first mounting box 3 and the second mounting box 4.

[0019] When the stern shaft body 2 axially moves, it will reciprocally push and squeeze the automatic adjustment and compensation component through the first disc 5 and the second disc 6. When the automatic adjustment and compensation component is pushed and squeezed, it squeezes the first airbag 11 and the second airbag 12 respectively, so that the gases inside the first airbag 11 and the second airbag 12 are respectively squeezed into the interiors of the first air pipe 14 and the second air pipe 16 through the first air nozzle 13 and the second air nozzle 15. The gases inside the first air pipe 14 and the second air pipe 16 will respectively enter the interiors of the first hollow sealing ring 8 and the second hollow sealing ring 10, so that the first hollow sealing ring 8 and the second hollow sealing ring 10 expand and tightly adhere to the stern shaft body 2, thereby ensuring the sealing effect; enabling this sealing device to automatically adjust and compensate according to the axial movement of the stern shaft, thereby ensuring its sealing effect.

[0020] The automatic adjustment compensation component includes two fixed sleeves 17 which are fixedly installed at the middle parts of the mutually remote sides of the first installation box 3 and the second installation box 4. A moving rod 18 is inserted into the interior of each of the two fixed sleeves 17. One ends of the two moving rods 18 close to each other respectively extend into the interiors of the first installation box 3 and the second installation box 4 and are both fixedly installed with a mounting block 20. One sides of the two mounting blocks 20 close to each other are both fixedly installed with a pushing plate 19, and the two pushing plates 19 are respectively in contact with the first airbag 11 and the second airbag 12; both the upper and lower sides of the two mounting blocks 20 are fixedly installed with a support rod 21, one ends of the support rods 21 are both fixedly installed with a sliding sleeve 22, a sliding rod 23 is inserted into the interior of each of the sliding sleeves 22, one ends of the sliding rods 23 are respectively fixedly connected to the inner walls of the first installation box 3 and the second installation box 4, a fixed disk 24 is fixedly installed on one side of the surface of each of the sliding rods 23, a spring 25 is arranged at the middle part of the surface of each of the sliding rods 23, and both ends of the spring 25 are respectively fixedly connected to the sliding sleeve 22 and the fixed disk 24.

[0021] When the two moving rods 18 are pushed, they will both move inwards along the fixed sleeves 17. When the two moving rods 18 move inwards, they both drive the mounting blocks 20 to move inwards. When the mounting blocks 20 move, they both drive the sliding sleeves 22 to slide along the surfaces of the sliding rods 23 through the support rods 21 and simultaneously squeeze the springs 25. The springs 25 can push the two moving rods 18 to reset through their own elastic forces. When the mounting blocks 20 move inwards, they both drive the pushing plates 19 to squeeze the first airbag 11 and the second airbag 12.

Claims

1. An automatically adjustable marine stern shaft sealing device, comprising a sealing end cover (1), characterized in that: The stern shaft body (2) is rotatably installed inside the sealing end cover (1). The first installation box (3) is fixedly installed on the upper part of one end of the sealing end cover (1), and the second installation box (4) is fixedly installed on the upper part of the other end of the sealing end cover (1). The first disc (5) is fixedly installed on the surface of one end of the stern shaft body (2), and the second disc (6) is fixedly installed on the surface of the other end of the stern shaft body (2). The first circular groove (7) is opened on one side inside the sealing end cover (1), and the first hollow sealing ring (8) is fixedly installed inside the first circular groove (7). The second circular groove (9) is opened on the other side inside the sealing end cover (1), and the second hollow sealing ring (10) is fixedly installed inside the second circular groove (9). The first airbag (11) is fixedly installed on one side inside the first installation box (3), and the second airbag (12) is fixedly installed on one side inside the second installation box (4). The first air nozzle (13) is fixedly installed at one end of the first airbag (11) close to the first hollow sealing ring (8). One end of the first air nozzle (13) is fixedly installed with the first air pipe (14). The first air pipe (14) extends into the first circular groove (7) and is fixedly connected with the first hollow sealing ring (8). The second air nozzle (15) is fixedly installed at one end of the second airbag (12) close to the second hollow sealing ring (10). One end of the second air nozzle (15) is fixedly installed with the second air pipe (16). One end of the second air pipe (16) extends into the second circular groove (9) and is fixedly connected with the second hollow sealing ring (10). An automatic adjustment and compensation component is arranged between the interiors of the first installation box (3) and the second installation box (4).

2. The automatically adjustable marine stern shaft sealing device according to claim 1, characterized in that: The automatic adjustment and compensation component includes two fixed sleeves (17). The two fixed sleeves (17) are fixedly installed in the middle of the mutually remote sides of the first installation box (3) and the second installation box (4). The moving rods (18) are inserted into the interiors of the two fixed sleeves (17). One ends of the two moving rods (18) close to each other respectively extend into the interiors of the first installation box (3) and the second installation box (4) and are both fixedly installed with the installation blocks (20). The pushing plates (19) are fixedly installed on the sides of the two installation blocks (20) close to each other. The two pushing plates (19) are respectively in contact with the first airbag (11) and the second airbag (12).

3. The automatically adjustable marine stern shaft sealing device according to claim 2, characterized in that: The support rods (21) are fixedly installed on the upper and lower sides of the two installation blocks (20). The sliding sleeves (22) are fixedly installed at one ends of the support rods (21). The sliding rods (23) are inserted into the interiors of the sliding sleeves (22). One ends of the sliding rods (23) are respectively fixedly connected with the inner walls of the first installation box (3) and the second installation box (4). The fixed discs (24) are fixedly installed on one sides of the surfaces of the sliding rods (23). The springs (25) are arranged in the middle of the surfaces of the sliding rods (23). The two ends of the springs (25) are respectively fixedly connected with the sliding sleeves (22) and the fixed discs (24).

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