Leak-proof and adjustable tail shaft rear seal

Abstract

The present invention discloses a leak-proof and adjustable tail shaft rear sealing device, which relates to the technical field of tail shaft sealing. The leak-proof and adjustable tail shaft rear sealing device comprises a bottom shaft, a bushing is rotatably sleeved at the center of the bottom shaft, and a first docking outer shaft and a second docking outer shaft are provided on the upper surface of the bottom shaft, both of which are semicircular and mirror-set. The outer surface of the bottom shaft is fixedly connected to two first fixing blocks that are mirror-set, the outer surface of the first docking outer shaft is fixedly connected to two second fixing blocks, and the outer surface of the second docking outer shaft is fixedly connected to two third fixing blocks. The leak-proof and adjustable tail shaft rear sealing device is convenient for removing the first docking outer shaft and the second docking outer shaft from the bottom shaft, so that the sealing ring can be replaced, which further improves the sealing effect of the device on the tail shaft. At the same time, the device is relatively simple to replace the sealing ring, without complicated operating steps, and further improves the efficiency of the staff in replacing the sealing ring.

Description

Technical Field

[0001] The invention relates to the technical field of tail shaft sealing, in particular to a leakage-proof and adjustable tail shaft rear sealing device. Background Art

[0002] The tail shaft of a ship is the rotating shaft used to connect the propeller on the ship. During the use of the ship, the tail shaft is usually immersed in water. Generally, a sealing device needs to be installed to prevent moisture from entering the interior of the ship through the tail shaft. The tail shaft fixing sleeve is set in the bushing and sealed by the sealing oil system between the bushing and the outer shaft body.

[0003] Most existing sealing oil systems are sealed by injecting sealing oil into the sealing oil chamber between the bushing and the outer shaft body. However, in order to prevent the sealing oil from leaking, a sealing ring is provided between the bushing and the outer shaft body. The sealing ring is used to prevent the sealing oil from leaking and to prevent external water from entering the gap between the bushing and the outer shaft body. However, the existing tail shaft will synchronously drive the bushing to rotate when rotating, which will cause certain wear to the sealing ring during long-term use. Therefore, in order to prevent the sealing oil from leaking from the worn part of the sealing ring, the sealing ring needs to be replaced. However, the existing installation structure between the bushing and the outer shaft body is relatively complicated, which makes it difficult to remove the sealing ring. At the same time, the bushing and the tail shaft need to be removed during the removal process, which increases the operating steps and difficulty of the staff when replacing the sealing ring, and reduces the efficiency of replacing the sealing ring. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a leak-proof and adjustable tail shaft rear sealing device, which can solve the problem of increasing the operating steps and difficulty of the staff when replacing the sealing ring, and reducing the efficiency of the sealing ring replacement.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof and adjustable tail shaft rear sealing device, comprising a bottom shaft, a bushing being rotatably sleeved at the center of the bottom shaft, a first docking outer shaft and a second docking outer shaft being provided on the upper surface of the bottom shaft, both of which are semi-circular and mirror-imaged, the outer surface of the bottom shaft being fixedly connected to two first fixing blocks being mirror-imaged, the outer surface of the first docking outer shaft being fixedly connected to two second fixing blocks, and the outer surface of the second docking outer shaft being fixedly connected to two third fixing blocks;

[0006] The upper surface of the first fixing block is fixedly connected with an installation tenon block, and the structure of the installation tenon block is set to be bulb-shaped. Two installation tenon grooves that match the installation tenon block are provided on the second fixing block and the third fixing block. Two second threaded holes that are mirror-symmetrically arranged and communicate with the installation tenon grooves are provided on the opposite surfaces of the second fixing block and the third fixing block. The two second threaded holes respectively extend out of the upper surfaces of the second fixing block and the third fixing block. A first threaded hole aligned with the two second threaded holes is provided on the upper surface of the installation tenon block. A fixing bolt is provided between the first threaded hole and the two second threaded holes.

[0007] Preferably, a first embedding groove communicating with the inner ring is provided on the upper surface of the bottom shaft, and the first embedding groove is annular. A first sealing ring is provided in the first embedding groove on the bottom shaft.

[0008] Preferably, an oil supply valve body is fixedly connected to the outer surface of the first docking outer shaft. Two sealing oil cavities that respectively extend out of the opposite surfaces of the first docking outer shaft and the second docking outer shaft are provided in the inner rings of the first docking outer shaft and the second docking outer shaft. The input pipe of the oil supply valve body penetrates into the sealing oil cavity inside the first docking outer shaft.

[0009] Preferably, two second embedding grooves that extend out of the opposite surfaces of the first docking outer shaft and the second docking outer shaft are provided in the inner rings of the first docking outer shaft and the second docking outer shaft. Second sealing rings are provided in the two second embedding grooves on the first docking outer shaft and the second docking outer shaft. The two second embedding grooves are respectively located on the upper and lower sides of the sealing oil cavity.

[0010] Preferably, two C-shaped docking grooves that are mirror-symmetrically arranged are provided on the two side surfaces of the second docking outer shaft facing the first docking outer shaft. Two C-shaped docking blocks that respectively match the two C-shaped docking grooves are fixedly connected to the two side surfaces of the first docking outer shaft facing the second docking outer shaft.

[0011] Preferably, an annular docking sealing groove is provided on the upper surface of the bottom shaft. The docking sealing groove is set to be a combination of two radial rings. Two sealing docking blocks that match the docking sealing groove are fixedly connected to the lower surfaces of the first docking outer shaft and the second docking outer shaft.

[0012] Preferably, both of the two sealing docking blocks are set to be semi-circular arc-shaped and are mirror-symmetrically arranged.

[0013] Preferably, the two installation tenon grooves respectively extend out of the opposite side surfaces of the second fixing block and the opposite side surfaces of the third fixing block.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] (1). The anti-leakage adjustable rear seal device for the tail shaft forms a fixing effect on the installation tenon block through the fixing bolts, preventing loosening between the installation tenon block and the installation tenon groove, further improving the firmness among the first docking outer shaft, the second docking outer shaft and the bottom shaft. At the same time, it is also convenient to remove the first docking outer shaft and the second docking outer shaft from the bottom shaft, so that the sealing ring can be replaced, further improving the sealing effect of the device on the tail shaft. At the same time, the replacement of the sealing ring of the device is relatively simple without complex operation steps, further improving the efficiency of the staff in replacing the sealing ring.

[0016] (2). When the first docking outer shaft and the second docking outer shaft are combined and installed on the bottom shaft, the anti-leakage adjustable rear seal device for the tail shaft is对接吻合 with the docking seal groove through two docking seal blocks, increasing the sealing performance between the first docking outer shaft, the second docking outer shaft and the bottom shaft, thus avoiding the penetration of seawater into the gap between the bushing and the bottom shaft, and further ensuring the use effect of the device.

[0017] (3). The anti-leakage adjustable rear seal device for the tail shaft is对接吻合 with two U-shaped docking grooves through two U-shaped docking blocks respectively, further increasing the sealing performance between the first docking outer shaft and the second docking outer shaft, preventing both the leakage of sealing oil and the penetration of seawater through the gap between the first docking outer shaft and the second docking outer shaft into the gap between the bushing and the bottom shaft, further improving the sealing effect of the device and ensuring the use effect of the sealing oil.

[0018] (4). The anti-leakage adjustable rear seal device for the tail shaft forms a sealing effect on the sealing oil cavity through two second sealing rings, avoiding the leakage of the sealing oil in the sealing oil cavity, improving the sealing effect of the sealing oil on the bushing, and preventing the external seawater from entering the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings and embodiments:

[0020] Figure 1 is a schematic structural diagram of the anti-leakage adjustable rear seal device for the tail shaft of the present invention;

[0021] Figure 2 is a schematic diagram of the removal of the first docking outer shaft and the second docking outer shaft of the present invention;

[0022] Figure 3 is a schematic diagram of the separation of the first docking outer shaft and the second docking outer shaft of the present invention;

[0023] Figure 4 is a schematic diagram of the separation of the installation tenon block and the installation tenon groove of the present invention;

[0024] Figure 5This is the internal side view plan of the first fixing block, the second fixing block and the third fixing block of the present invention.

[0025] Reference numerals: 1 bottom shaft, 2 bushing, 3 first docking outer shaft, 4 second docking outer shaft, 5 oil supply valve body, 6 first embedding groove, 7 first sealing ring, 8 sealed oil chamber, 9 second embedding groove, 10 second sealing ring, 11 C-shaped docking groove, 12 C-shaped docking block, 13 docking sealing block, 14 docking sealing groove, 15 first fixing block, 16 second fixing block, 17 third fixing block, 18 mounting tenon block, 19 mounting tenon groove, 20 first threaded hole, 21 second threaded hole, 22 fixing bolt. Detailed implementation manners

[0026] Please refer to Figure 1-3 , the present invention provides a technical solution: a leak-proof adjustable rear seal device for a tail shaft, including a bottom shaft 1, a bushing 2 is rotatably sleeved in the center of the bottom shaft 1. Therefore, by sleeving the bushing 2 on the tail shaft and fixing it to the tail shaft, and the bottom shaft 1 is fixed on the hull, so that the bushing 2 rotates synchronously with the tail shaft in the inner ring of the bottom shaft 1, and the sealing mechanism between the bottom shaft 1 and the bushing 2 achieves the sealing of the tail shaft, preventing water from seeping through the gap between the tail shaft and the hull.

[0027] Furthermore, a first embedding groove 6 communicating with the inner ring is opened on the upper surface of the bottom shaft 1. At the same time, the first embedding groove 6 is annular, and a first sealing ring 7 is arranged in the first embedding groove 6 on the bottom shaft 1. Therefore, the first sealing ring 7 seals the gap between the bottom shaft 1 and the bushing 2, avoiding the penetration of external seawater into the cabin through the gap between the bottom shaft 1 and the bushing 2 during use.

[0028] Furthermore, a first docking outer shaft 3 and a second docking outer shaft 4 are arranged on the upper surface of the bottom shaft 1. Both the first docking outer shaft 3 and the second docking outer shaft 4 are semi-circular and are arranged in a mirror image form. Therefore, the first docking outer shaft 3 and the second docking outer shaft 4 are docked and combined into a circular ring and sleeved on the outer surface of the bushing 2.

[0029] Furthermore, an oil supply valve body 5 is fixedly connected to the outer surface of the first docking outer shaft 3. Two sealed oil chambers 8 respectively extending out of the opposite surfaces of the first docking outer shaft 3 and the second docking outer shaft 4 are opened in the inner rings of the first docking outer shaft 3 and the second docking outer shaft 4. At the same time, the input pipe of the oil supply valve body 5 penetrates into the sealed oil chamber 8 in the first docking outer shaft 3. Therefore, when the first docking outer shaft 3 and the second docking outer shaft 4 are sleeved on the outer surface of the bushing 2, sealed oil is filled into the sealed oil chamber 8 through the oil supply valve body 5, and the sealed oil seals the gap between the bushing 2 and the first docking outer shaft 3 and the second docking outer shaft 4, further preventing external seawater from penetrating into the cabin and further improving the sealing effect of the device.

[0030] Further, two second embedding grooves 9 extending out of the opposite surfaces of the first docking outer shaft 3 and the second docking outer shaft 4 are provided on the inner rings of the first docking outer shaft 3 and the second docking outer shaft 4. Second sealing rings 10 are arranged in the two second embedding grooves 9 on the first docking outer shaft 3 and the second docking outer shaft 4. At the same time, the two second embedding grooves 9 are respectively located on the upper and lower sides of the sealed oil cavity 8. Therefore, the sealed oil cavity 8 is sealed by the second sealing rings 10, thus avoiding the leakage of the sealed oil in the sealed oil cavity 8, improving the sealing effect of the sealed oil on the bushing 2, and preventing the external seawater from entering the cabin.

[0031] Further, two C-shaped docking grooves 11 arranged in a mirror image are provided on the two side surfaces of the second docking outer shaft 4 facing the first docking outer shaft 3. Two C-shaped docking blocks 12 respectively coinciding with the two C-shaped docking grooves 11 are fixedly connected to the two side surfaces of the first docking outer shaft 3 facing the second docking outer shaft 4. Therefore, when the first docking outer shaft 3 and the second docking outer shaft 4 are docked, the two C-shaped docking blocks 12 are respectively docked and coincided with the two C-shaped docking grooves 11, thus further increasing the sealing performance between the first docking outer shaft 3 and the second docking outer shaft 4, preventing both the leakage of the sealed oil and the seawater from penetrating through the gap between the first docking outer shaft 3 and the second docking outer shaft 4 to the space between the bushing 2 and the bottom shaft 1. Thus, the sealing effect of the device is further improved, ensuring the use effect of the sealed oil.

[0032] Further, an annular docking sealing groove 14 is provided on the upper surface of the bottom shaft 1, and the docking sealing groove 14 is set as a combination of two radial circular rings. Two sealing docking blocks 13 coinciding with the docking sealing groove 14 are fixedly connected to the lower surfaces of the first docking outer shaft 3 and the second docking outer shaft 4. At the same time, the two sealing docking blocks 13 are arranged in a mirror image. Therefore, when the first docking outer shaft 3 and the second docking outer shaft 4 are combined and installed on the bottom shaft 1, the two docking sealing blocks 13 are docked and coincided with the docking sealing groove 14, thus increasing the sealing performance between the first docking outer shaft 3 and the second docking outer shaft 4 and the bottom shaft 1, thereby avoiding the situation that seawater penetrates into the gap between the bushing 2 and the bottom shaft 1, and further ensuring the use effect of the device.

[0033] In this embodiment, a sealing rubber pad can be provided at the connection between the bottom shaft 1, the first docking outer shaft 3 and the second docking outer shaft 4, thus further increasing the sealing performance among the three, and at the same time having no impact on the installation of the bottom shaft 1, the first docking outer shaft 3 and the second docking outer shaft 4.

[0034] Please refer to Figure 3-5The outer surface of the bottom shaft 1 is fixedly connected to two first fixing blocks 15 arranged in a mirror image. The two first fixing blocks 15 are flush with the upper surface of the bottom shaft 1. The outer surface of the first docking outer shaft 3 is fixedly connected to two second fixing blocks 16. At the same time, the lower surfaces of the two fixing blocks 16 are flush with the first docking outer shaft 3 and are flush with the surface of the first docking outer shaft 3 facing the second docking outer shaft 4. Two third fixing blocks 17 are fixedly connected to the outer surface of the second docking outer shaft 4 near the two second fixing blocks 16. When the first docking outer shaft 3 and the second docking outer shaft 4 are docked, the second fixing block 16 coincides with the third fixing block 17. When the first docking outer shaft 3 and the second docking outer shaft 4 are combined and docked with the bottom shaft 1, the second fixing block 16 and the third fixing block 17 are combined and docked flush with the first fixing block 15.

[0035] Furthermore, the upper surface of the first fixed block 15 is fixedly connected with a mounting tenon 18, and the structure of the mounting tenon 18 is set to a light bulb shape. The second fixed block 16 and the third fixed block 17 are provided with two mounting tenons 19 that match the mounting tenon 18, and the two mounting tenons 19 extend from the opposite side surfaces of the second fixed block 16 and the opposite side surfaces of the third fixed block 17 respectively. Therefore, when the first docking outer shaft 3 and the second docking outer shaft 4 are docked and installed on the bottom shaft 1, and the docking sealing block 13 matches the docking sealing groove 14, the first docking outer shaft 3 and the second docking outer shaft 4 are pushed at the same time, so that the second fixed block 16 and the third fixed block 17 are rotated in combination to be flush with the first fixed block 15, and the mounting tenon 18 and the mounting tenon groove 19 are docked and matched, so that the first docking outer shaft 3 and the second docking outer shaft 4 are fixed on the bottom shaft 1 through the mounting tenon 18.

[0036] In this embodiment, the mounting tenon block 18 is configured as an arc shape as a whole, so that the mounting tenon block 18 and the mounting tenon groove 19 will not get stuck when they are rotated and docked, thereby ensuring the stability of the mounting tenon block 18 during docking.

[0037] In this embodiment, the number of the first fixing block 15, the second fixing block 16 and the third fixing block 17 can be set to multiple, not limited to two in this embodiment, which further increases the firmness between the first docking outer shaft 3 and the second docking outer shaft 4 and the bottom shaft 1.

[0038] Furthermore, two second threaded holes 21 are provided on the opposite surfaces of the second fixing block 16 and the third fixing block 17, which are mirror-imaged and communicate with the mounting tenon groove 19. At the same time, the two second threaded holes 21 extend from the upper surface of the second fixing block 16 and the upper surface of the third fixing block 17 respectively. The upper surface of the mounting tenon block 18 is provided with a first threaded hole 20 aligned with the two second threaded holes 21. A fixing bolt 22 is provided between the first threaded hole 20 and the two second threaded holes 21. Therefore, the fixing bolt 22 forms a fixing effect on the mounting tenon block 18, preventing loosening between the mounting tenon block 18 and the mounting tenon groove 19, further improving the firmness between the first docking outer shaft 3, the second docking outer shaft 4 and the bottom shaft 1, and also facilitating the removal of the first docking outer shaft 3 and the second docking outer shaft 4 from the bottom shaft 1, so that the sealing ring can be replaced, which further improves the sealing effect of the device on the tail shaft. At the same time, the device is relatively simple to replace the sealing ring, without complicated operating steps, further improving the efficiency of the staff in replacing the sealing ring.

[0039] Working principle: When the leak-proof adjustable tail shaft rear sealing device is used, the first docking outer shaft 3 and the second docking outer shaft 4 are docked and installed on the bottom shaft 1, and the docking sealing block 13 is matched with the docking sealing groove 14, and the first docking outer shaft 3 and the second docking outer shaft 4 are pushed at the same time, so that the second fixing block 16 and the third fixing block 17 are rotated in combination to be flush with the first fixing block 15, and the installation tenon block 18 and the installation tenon groove 19 are docked and matched, and the first threaded hole 20 and the two second threaded holes 21 are in the same vertical position, so that the fixing bolts 22 are screwed into the first threaded hole 20 and the two second threaded holes 21 to complete the firmness between the first docking outer shaft 3 and the second docking outer shaft 4 and the bottom shaft 1, conversely, the fixing bolts 22 are removed from the first threaded hole 20 and the two second threaded holes 21, so that the first docking outer shaft 3 and the second docking outer shaft 4 can be removed from the bottom shaft 1.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the scope of the present invention.

Claims

1. Anti-leakage and adjustable tail shaft rear sealing device, characterized by: The invention comprises a bottom shaft (1), wherein the center of the bottom shaft (1) is rotatably sleeved with a bushing (2), and the upper surface of the bottom shaft (1) is provided with a first docking outer shaft (3) and a second docking outer shaft (4), both of which are semicircular and mirror-imaged. The outer surface of the bottom shaft (1) is fixedly connected to two first fixing blocks (15) that are mirror-imaged, the outer surface of the first docking outer shaft (3) is fixedly connected to two second fixing blocks (16), and the outer surface of the second docking outer shaft (4) is fixedly connected to two third fixing blocks (17); The upper surface of the first fixing block (15) is fixedly connected with a mounting tenon block (18), and the structure of the mounting tenon block (18) is set in a light bulb shape. The second fixing block (16) and the third fixing block (17) are provided with two mounting tenon grooves (19) that match the mounting tenon block (18). Two second threaded holes (21) that are mirror-imaged and communicate with the mounting tenon grooves (19) are provided on the opposite surfaces of the second fixing block (16) and the third fixing block (17). The two second threaded holes (21) extend from the upper surface of the second fixing block (16) and the upper surface of the third fixing block (17) respectively. A first threaded hole (20) aligned with the two second threaded holes (21) is provided on the upper surface of the mounting tenon block (18), and a fixing bolt (22) is provided between the first threaded hole (20) and the two second threaded holes (21). The upper surface of the bottom shaft (1) is provided with a first embedding groove (6) communicating with the inner ring, and the first embedding groove (6) is annular, and a first sealing ring (7) is provided in the first embedding groove (6) on the bottom shaft (1); The outer surface of the first docking outer shaft (3) is fixedly connected to an oil supply valve body (5); two sealed oil chambers (8) are provided on the inner rings of the first docking outer shaft (3) and the second docking outer shaft (4), respectively extending from the opposite surfaces of the first docking outer shaft (3) and the second docking outer shaft (4); and the input pipe of the oil supply valve body (5) passes through the sealed oil chamber (8) in the first docking outer shaft (3); Two second embedding grooves (9) extending from the opposite surfaces of the first docking outer shaft (3) and the second docking outer shaft (4) are provided on the inner rings of the first docking outer shaft (3) and the second docking outer shaft (4); second sealing rings (10) are provided in the two second embedding grooves (9) on the first docking outer shaft (3) and the second docking outer shaft (4); the two second embedding grooves (9) are respectively located on the upper and lower sides of the sealing oil chamber (8); Two mirror-image-arranged ⌚-shaped docking grooves (11) are provided on the two side surfaces of the second docking outer shaft (4) facing the first docking outer shaft (3); and two ⌚-shaped docking blocks (12) respectively matching the two ⌚-shaped docking grooves (11) are fixedly connected to the two side surfaces of the first docking outer shaft (3) facing the second docking outer shaft (4); An annular docking sealing groove (14) is provided on the upper surface of the bottom shaft (1), and the docking sealing groove (14) is arranged in the shape of a combination of two radial circular rings. The lower surfaces of the first docking outer shaft (3) and the second docking outer shaft (4) are fixedly connected with two sealing docking blocks (13) that match the docking sealing groove (14).

2. The leak-proof and adjustable tail shaft rear sealing device according to claim 1, characterized in that: The two sealing butt joint blocks (13) are both arranged in a semicircular arc shape and are arranged in a mirror image.

3. The leak-proof and adjustable tail shaft rear sealing device according to claim 1, characterized in that: The two mounting grooves (19) extend from two opposite side surfaces of the second fixing block (16) and two opposite side surfaces of the third fixing block (17), respectively.

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