Ship stern axial sealing waterproof device

Abstract

The utility model belongs to the technical field of ship stern axial sealing, and particularly relates to a ship stern axial sealing waterproof device which comprises a transmission shaft, a shaft sleeve is installed on the middle section of a shaft body of the transmission shaft through a bearing, a locking edge is fixedly connected to the shaft sleeve, and a shaft seal is installed on the front section of the shaft body of the transmission shaft through a sealing bearing. The shaft seal abuts against the shaft sleeve, the shaft seal is connected to the inner side of the locking edge in a sliding mode, a sealing ring is embedded in the shaft seal, and the sealing ring abuts against the shaft sleeve. The shaft seal is additionally arranged at the front end of the transmission shaft and the front end of the shaft sleeve, the sealing ring is arranged on the shaft seal, the shaft seal is installed on the transmission shaft through the sealing bearing, the annular cavity is formed in the shaft seal, the rubber for sealing is arranged at the position of the annular cavity, and therefore after high-pressure air is injected into the annular cavity, the sealing effect is good. And meanwhile, the rubber sheet is matched with the sealing ring and the sealing bearing, so that axial sealing and water prevention can be performed on the transmission shaft and the shaft sleeve.

Description

Technical Field

[0001] This utility model relates to the field of ship stern axial sealing technology, specifically a ship stern axial sealing and waterproofing device. Background Technology

[0002] The stern shaft, also known as the tail shaft, is the last section of the shaft system. The forward flange is connected to the intermediate shaft flange with tight-fitting bolts, and the stern end is conical in shape, used to mount the propeller. The stern shaft is a key link in the ship's power system for transmitting power and is an important medium connecting the engine and the propeller. It is through the stern shaft that the propeller rotates, enabling the ship to sail smoothly. The stern shaft seal directly affects the normal operation and economy of the ship and its machinery. A search revealed that utility model patent CN221541942U discloses a stern axial sealing and waterproofing device for ships, comprising a rotating shaft and a sealing connecting plate. A sealing sleeve is provided on the side of the rotating shaft surface, and a connecting flange is fixedly connected to the right end of the sealing connecting plate surface. A sealing mounting plate is provided on the inner side of the sealing connecting plate. This stern axial sealing and waterproofing device for ships utilizes a sealing bearing, a sealing mounting plate, and a bearing sleeve. The sealing mounting plate connects the bearing sleeve and the sealing connecting plate, while the sealing bearing isolates and protects the sealing mounting plate, and the sealing ring provides sealing protection, achieving waterproofing. Simultaneously, the side of the bearing sleeve and the sealing sleeve fit together, staggering the installation gap of the sealing ring and ensuring waterproofing during rotation. Furthermore, the sealing mounting plate, bearing sleeve, and sealing connecting plate are connected by bolts, facilitating disassembly and maintenance and improving convenience.

[0003] However, existing stern axial sealing waterproofing devices for ships rely on sealing bearings and sealing rings for waterproofing, which has limited effectiveness. Furthermore, bolted installations are prone to corrosion, are inconvenient to install and disassemble, and lack stability. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to provide a ship stern axial sealing and waterproofing device, which solves the problem that the existing ship stern axial sealing and waterproofing devices rely on sealing bearings and sealing rings for waterproofing, resulting in limited effectiveness. At the same time, it also solves the problems that bolt installation is prone to corrosion, inconvenient to disassemble and assemble, and not very stable.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a ship stern axial sealing and waterproofing device, comprising a drive shaft, a bushing mounted on the middle section of the drive shaft via a bearing, a locking edge fixedly connected to the bushing, a shaft seal mounted on the front section of the drive shaft via a sealing bearing, the shaft seal abutting against the bushing, the shaft seal slidably connected to the inner side of the locking edge, a sealing ring embedded in the shaft seal, the sealing ring abutting against the bushing, an annular cavity opened inside the shaft seal, a rubber sheet fixedly connected to the inner wall of the shaft seal, the position of the rubber sheet corresponding to the annular cavity, the rubber sheet abutting against the drive shaft, and a locking mechanism fixedly connected to the shaft seal.

[0006] Preferably, a one-way valve nozzle is fixedly connected to the shaft seal, and the one-way valve nozzle extends to the inner side of the annular cavity. Air can be injected into the annular cavity through the one-way valve nozzle.

[0007] Preferably, the locking mechanism includes a hollow shell fixedly connected to the shaft seal. A guide rod is fixedly connected inside the hollow shell, and a locking pin is slidably sleeved on the outer side of the guide rod. The locking pin penetrates the hollow shell and is slidably connected to it. The locking pin is inserted into a locking edge, and a bevel block is fixedly connected to the pin body. A pusher is slidably connected to the side of the hollow shell, penetrating the hollow shell. One end of the pusher located inside the hollow shell abuts against the bevel block. The locking mechanism improves the stability of the shaft seal after installation.

[0008] Preferably, a spring is provided inside the locking pin, one end of which is fixedly connected to the guide rod, and the other end of which is fixedly connected to the inner surface of the locking pin. This locking mechanism not only facilitates the installation of the shaft seal but also improves its stability after installation.

[0009] Preferably, a push block is fixedly connected to one end of the pusher located on the outer side of the hollow shell, and the push block and the pusher are an integral structure. The push block facilitates the pushing of the pusher.

[0010] Preferably, a magnetic ring is fixedly connected to the push pin, and the magnetic ring is attracted to the inner surface of the hollow shell. The magnetic ring provides auxiliary fixation for the push pin.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model adds a shaft seal to the front end of the drive shaft and bushing. The shaft seal is not only equipped with a sealing ring, but also mounted on the drive shaft through a sealing bearing. In addition, an annular cavity is set inside the shaft seal, and a sealing rubber is set in the annular cavity. When high-pressure air is injected into the annular cavity, the rubber expands and maintains tight contact with the drive shaft. At the same time, in cooperation with the sealing ring and the sealing bearing, the axial sealing and waterproofing of the drive shaft and bushing can be achieved.

[0013] 2. This utility model provides a locking mechanism on the shaft seal. After the shaft seal is installed in place, the locking pin in the locking mechanism will be inserted into the locking edge on the shaft sleeve under the action of the spring. This improves the stability of the shaft seal after installation and further ensures the tight contact and sealing between the sealing ring and the shaft sleeve. Attached Figure Description

[0014] Figure 1 This is a perspective view of the overall structure of this utility model;

[0015] Figure 2 For the present utility model Figure 1 A partial structural diagram;

[0016] Figure 3 For the present utility model Figure 1 A front sectional view;

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of the structure at point A.

[0018] In the diagram: 1. Drive shaft; 2. Bushing; 3. Shaft seal; 4. Locking edge; 5. Sealing ring; 6. Ring cavity; 7. Rubber sheet; 8. One-way valve nozzle; 9. Locking mechanism; 91. Hollow shell; 92. Guide rod; 93. Locking pin; 94. Spring; 95. Inclined block; 96. Pushing pin; 97. Push block; 98. Magnetic ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3A stern axial sealing and waterproofing device for a ship includes a drive shaft 1. A bushing 2 is mounted on the middle section of the drive shaft 1 via a bearing. A locking edge 4 is fixedly connected to the bushing 2. A shaft seal 3 is mounted on the front section of the drive shaft 1 via a sealing bearing, and the shaft seal 3 abuts against the bushing 2. The shaft seal 3 is slidably connected to the inner side of the locking edge 4. A sealing ring 5 is embedded in the shaft seal 3, and the sealing ring 5 abuts against the bushing 2. An annular cavity 6 is formed inside the shaft seal 3. A rubber sheet 7 is fixedly connected to the inner wall of the shaft seal 3, and the position of the rubber sheet 7 corresponds to the annular cavity 6. The rubber sheet 7 abuts against the drive shaft 1. A one-way valve nozzle 8 is fixedly connected to the shaft seal 3, and the one-way valve nozzle 8 extends to the inner side of the annular cavity 6. Air can be injected into the annular cavity 6 through the one-way valve nozzle 8.

[0021] Please see Figure 3-4 A locking mechanism 9 is fixedly connected to the shaft seal 3. The locking mechanism 9 enhances the stability of the shaft seal 3 after installation. The locking mechanism 9 includes a hollow shell 91 fixedly connected to the shaft seal 3. A guide rod 92 is fixedly connected inside the hollow shell 91. A locking pin 93 is slidably sleeved on the outer side of the guide rod 92. The locking pin 93 penetrates the hollow shell 91 and is slidably connected to it. The locking pin 93 is inserted into the locking edge 4. A bevel block 95 is fixedly connected to the pin of the locking pin 93. A pusher 96 is slidably connected to the side of the hollow shell 91, penetrating the hollow shell 91. One end of the pusher 96 located inside the hollow shell 91 abuts against the bevel block 95. A spring 94 is installed inside the locking pin 93. One end of the spring 94 is fixedly connected to the guide rod 92, and the other end of the spring 94 is fixedly connected to the inner surface of the locking pin 93. The locking mechanism 9 facilitates the installation of the shaft seal 3 and improves its stability after installation. A push block 97 is fixedly connected to one end of the pusher 96 located outside the hollow shell 91, and the push block 97 and the pusher 96 are an integral structure. The push block 97 facilitates the pushing of the pusher 96. A magnetic ring 98 is fixedly connected to the pin of the pusher 96, and the magnetic ring 98 is attracted to the inner surface of the hollow shell 91. The magnetic ring 98 provides auxiliary fixation for the pusher 96.

[0022] The specific implementation process of this utility model is as follows: In use, firstly, the shaft seal 3 is installed on the transmission shaft 1 through the sealing bearing, and is located at the front end of the bushing 2 until the sealing ring 5 abuts against the bushing 2. At the same time, the push block 97 pushes the pusher 96. The pusher 96 cooperates with the inclined block 95 to make the locking pin 93 retract. After the shaft seal 3 is installed in place, the push block 97 can be released, and the locking pin 93 will be reset under the action of the spring 94 and inserted into the locking edge 4 on the bushing 2. This improves the stability of the shaft seal 3 after installation and further ensures the tight contact and sealing between the sealing ring 5 and the bushing 2. Then, high-pressure air is injected into the annular cavity 6 through the one-way valve nozzle 8. The rubber 7 expands and maintains tight contact with the transmission shaft 1. At the same time, in cooperation with the sealing ring 5 and the sealing bearing, the axial sealing and waterproofing of the transmission shaft 1 and the bushing 2 can be achieved.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ship stern axial sealing and waterproofing device, comprising a drive shaft (1), characterized in that: The middle section of the drive shaft (1) is fitted with a bushing (2) via a bearing. A locking edge (4) is fixedly connected to the bushing (2). The front section of the drive shaft (1) is fitted with a shaft seal (3) via a sealing bearing. The shaft seal (3) abuts against the bushing (2). The shaft seal (3) is slidably connected to the inner side of the locking edge (4). A sealing ring (5) is embedded in the shaft seal (3). The sealing ring (5) abuts against the bushing (2). An annular cavity (6) is opened inside the shaft seal (3). A rubber sheet (7) is fixedly connected to the inner wall of the shaft seal (3). The position of the rubber sheet (7) corresponds to the annular cavity (6). The rubber sheet (7) abuts against the drive shaft (1). A locking mechanism (9) is fixedly connected to the shaft seal (3).

2. The axial sealing and waterproofing device for a ship's stern as described in claim 1, characterized in that: A one-way valve nozzle (8) is fixedly connected to the shaft seal (3), and the one-way valve nozzle (8) extends to the inside of the annular cavity (6).

3. The axial sealing and waterproofing device for a ship's stern as described in claim 1, characterized in that: The locking mechanism (9) includes a hollow shell (91) fixedly connected to the shaft seal (3). A guide rod (92) is fixedly connected inside the hollow shell (91). A locking pin (93) is slidably sleeved on the outer side of the guide rod (92). The locking pin (93) penetrates the hollow shell (91) and is slidably connected to the hollow shell (91). The locking pin (93) is inserted into the locking edge (4). A bevel block (95) is fixedly connected to the pin body of the locking pin (93). A pusher (96) is slidably connected to the side of the hollow shell (91), and the pusher (96) penetrates the hollow shell (91). One end of the pusher (96) located inside the hollow shell (91) abuts against the bevel block (95).

4. The axial sealing and waterproofing device for a ship's stern as described in claim 3, characterized in that: The locking pin (93) is provided with a spring (94) inside. One end of the spring (94) is fixedly connected to the guide rod (92), and the other end of the spring (94) is fixedly connected to the inner surface of the locking pin (93).

5. A ship stern axial sealing and waterproofing device according to claim 3, characterized in that: The pusher (96) is fixedly connected to a pusher block (97) at one end outside the hollow shell (91), and the pusher block (97) and the pusher (96) are an integral structure.

6. A ship stern axial sealing and waterproofing device according to claim 3, characterized in that: A magnetic ring (98) is fixedly connected to the pin of the pusher (96), and the magnetic ring (98) is attracted to the inner surface of the hollow shell (91).

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