Stern shaft sealing structure for ship

Abstract

The utility model relates to the technical field of ships, in particular to a marine stern shaft sealing structure which comprises a stern shaft and an installation block, the cylindrical surface of the stern shaft is fixedly connected with a stern shaft tube, the installation block is rotatably connected with a fixing bolt, the fixing bolt extends into the stern shaft tube, the installation block is fixedly connected with a sealing ring, and the sealing ring is attached to the cylindrical surface of the stern shaft. The fixing bolt is rotationally connected with a driving mechanism, a transmission mechanism is arranged in the fixing bolt and meshed with the driving mechanism, and a limiting device is arranged in the fixing bolt and slidably connected with the transmission mechanism. And the sealing mechanism is prevented from being impacted by water flow for a long time to be loosened from the stern shaft tube.

Description

Technical Field

[0001] The utility model relates to the technical field of ships, in particular to a marine stern shaft sealing structure. Background Technique

[0002] As a device connecting a propeller and a power component, the sealing performance of a marine stern shaft is an important index to measure the hull performance. In the prior art, a sealing ring is used between the stern shaft and a sealing end cover.

[0003] It is found in use that most of the existing sealing structures are connected to a stern tube through bolts. When the propeller rotates, it will stir the surrounding water flow to impact the sealing structure. During the long-term operation of the stern shaft, it is easy to cause the connection between the sealing mechanism and the stern tube to become loose, that is, the sealing ring becomes loose and offset, and the sealing ring cannot contact the sealing end cover well, resulting in a decline in sealing performance.

[0004] The utility model aims to solve the technical problems existing in the prior art. For this purpose, a marine stern shaft sealing structure is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a marine stern shaft sealing structure to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A marine stern shaft sealing structure includes a stern shaft and a mounting block. A stern tube is fixedly connected to the cylindrical surface of the stern shaft. A fixing bolt is rotatably connected to the mounting block, and the fixing bolt extends into the stern tube. A sealing ring is fixedly connected to the mounting block, and the sealing ring is in contact with the cylindrical surface of the stern shaft.

[0008] The fixing bolt is rotatably connected to a driving mechanism. A transmission mechanism is arranged inside the fixing bolt. The transmission mechanism meshes with the driving mechanism. A limiting device is arranged inside the fixing bolt, and the limiting device is slidably connected to the transmission mechanism.

[0009] As a further scheme of the utility model: The driving mechanism includes a turning handle. The turning handle is rotatably connected to the fixing bolt. A turning rod is fixedly connected to the contact surface between the turning handle and the fixing bolt. The turning rod extends into the fixing bolt, and a driving gear is fixedly connected to the other end of the turning rod. The driving gear meshes with the transmission mechanism.

[0010] As a further scheme of the utility model: The transmission mechanism includes a sleeve. The sleeve is located inside the fixing bolt and is rotatably connected to the fixing bolt. A transmission gear is arranged on one side of the sleeve. The transmission gear meshes with the driving gear. A plurality of limiting blocks are fixedly connected to the inner surface of the sleeve. The plurality of limiting blocks are located inside the limiting device and are in sliding contact with the limiting device.

[0011] As a further solution of the present utility model: The limiting device is a limiting screw, and the limiting screw is located in the fixing bolt and is threadedly connected to the fixing bolt. A connecting block is fixedly connected to one side of the limiting screw.

[0012] As a further solution of the present utility model: The connecting block is located in the sleeve and is in sliding contact with the sleeve. A plurality of limiting chutes are provided on the cylindrical surface of the connecting block, and a plurality of limiting blocks are respectively located in the plurality of limiting chutes and are in sliding contact with the connecting block.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: When the device is in use, after the sealing ring is attached to the stern shaft, the fixing bolt is inserted into the stern tube. The turning handle is rotated, and the turning handle drives the driving gear to rotate through the turning rod. Since the driving gear meshes with the transmission gear, when the driving gear rotates, it drives the transmission gear to rotate. The transmission gear drives the sleeve to rotate, and the sleeve drives the limiting block to rotate. Since the limiting block is located in the limiting chute and is in sliding contact with the connecting block, that is, when the sleeve rotates, it drives the connecting block to rotate through the limiting block, and the connecting block drives the limiting screw to rotate. Since the limiting screw is threadedly connected to the fixing bolt, when the limiting screw rotates, the limiting screw moves and inserts into the stern tube for limiting, that is, it can ensure that the stern shaft will not loosen or shift during long-term operation. The mounting block is fixedly connected to the sealing ring, that is, the sealing ring will not loosen or shift. This device can ensure the connection between the sealing structure and the stern tube, and prevent the sealing mechanism from loosening the connection with the stern tube due to long-term impact of water flow. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a marine stern shaft sealing structure.

[0015] Figure 2 It is Figure 1 The enlarged view at A in

[0016] Figure 3 It is a schematic structural diagram of the connecting block in a marine stern shaft sealing structure.

[0017] 1 - Stern shaft, 2 - Mounting block, 3 - Stern tube, 4 - Fixing bolt, 5 - Turning handle, 6 - Turning rod, 7 - Limiting chute, 8 - Sealing ring, 9 - Driving gear, 10 - Transmission gear, 11 - Sleeve, 12 - Limiting block, 13 - Connecting block, 14 - Limiting screw. Detailed Description of the Embodiment

[0018] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0019] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. Embodiment

[0020] Please refer to Figures 1 - 3 , in an embodiment of the present utility model, a marine stern shaft sealing structure includes a stern shaft 1 and a mounting block 2. A stern tube 3 is fixedly connected to the cylindrical surface of the stern shaft 1. A fixing bolt 4 is rotatably connected to the mounting block 2. The fixing bolt 4 extends into the stern tube 3. A sealing ring 8 is fixedly connected to the mounting block 2, and the sealing ring 8 is in contact with the cylindrical surface of the stern shaft 1.

[0021] The fixing bolt 4 is rotatably connected to a driving mechanism. A transmission mechanism is arranged inside the fixing bolt 4. The transmission mechanism is engaged with the driving mechanism. A limiting device is arranged inside the fixing bolt 4. The limiting device is slidably connected to the transmission mechanism. This device can ensure the connection between the sealing structure and the stern tube, and prevent the sealing mechanism from being loosened from the stern tube due to long-term impact of water flow. Embodiment

[0022] Please refer to Figures 1 - 3 , on the basis of Embodiment 1, further, the driving mechanism includes a turning handle 5. The turning handle 5 is rotatably connected to the fixing bolt 4. A turning rod 6 is fixedly connected to the contact surface between the turning handle 5 and the fixing bolt 4. The turning rod 6 extends into the fixing bolt 4. A driving gear 9 is fixedly connected to the other end of the turning rod 6. The driving gear 9 is engaged with the transmission mechanism. By rotating the turning handle 5, the turning handle 5 drives the driving gear 9 to rotate through the turning rod 6. Since the driving gear 9 is engaged with the transmission gear 10, when the driving gear 9 rotates, it drives the transmission gear 10 to rotate, and the transmission gear 10 drives the sleeve 11 to rotate.

[0023] Further, the transmission mechanism includes a sleeve 11. The sleeve 11 is located inside the fixing bolt 4 and is rotatably connected to the fixing bolt 4. A transmission gear 10 is arranged on one side of the sleeve 11. The transmission gear 10 is engaged with the driving gear 9. A plurality of limiting blocks 12 are fixedly connected to the inner surface of the sleeve 11. The plurality of limiting blocks 12 are located in the limiting device and are in sliding contact with the limiting device. The sleeve 11 drives the limiting blocks 12 to rotate. Since the limiting blocks 12 are located in the limiting chute 7 and are in sliding contact with the connecting block 13, that is, when the sleeve 11 rotates, it drives the connecting block 13 to rotate through the limiting blocks 12, and the connecting block 13 drives the limiting screw 14 to rotate.

[0024] Further, the limiting device is a limiting screw 14. The limiting screw 14 is located in the fixing bolt 4 and is threadedly connected to the fixing bolt 4. A connecting block 13 is fixedly connected to one side of the limiting screw 14. Since the limiting screw 14 is threadedly connected to the fixing bolt 4, when the limiting screw 14 rotates, the limiting screw 14 moves and inserts into the stern tube 3 for limiting, that is, it can ensure that the stern shaft 2 will not loosen or shift during long-term operation.

[0025] Further, the connecting block 13 is located in the sleeve 11 and is in sliding contact with the sleeve 11. A plurality of limiting chutes 7 are formed on the cylindrical surface of the connecting block 13, and a plurality of limiting blocks 12 are respectively located in the plurality of limiting chutes 7 and are in sliding contact with the connecting block 13.

[0026] The working principle of the present utility model is as follows: When the device is in use, after the sealing ring 8 is attached to the stern shaft 1, the fixing bolt 4 is inserted into the stern tube 3. The turning handle 5 is rotated, and the turning handle 5 drives the driving gear 9 to rotate through the turning rod 6. Since the driving gear 9 meshes with the transmission gear 10, when the driving gear 9 rotates, it drives the transmission gear 10 to rotate. The transmission gear 10 drives the sleeve 11 to rotate, and the sleeve 11 drives the limiting block 12 to rotate. Since the limiting block 12 is located in the limiting chute 7 and is in sliding contact with the connecting block 13, that is, when the sleeve 11 rotates, it drives the connecting block 13 to rotate through the limiting block 12. The connecting block 13 drives the limiting screw 14 to rotate. Since the limiting screw 14 is threadedly connected to the fixing bolt 4, when the limiting screw 14 rotates, the limiting screw 14 moves and inserts into the stern tube 3 for limiting, that is, it can ensure that the stern shaft 2 will not loosen or shift during long-term operation. The mounting block 2 is fixedly connected to the sealing ring 8, that is, the sealing ring 8 will not loosen or shift. This device can ensure the connection between the sealing structure and the stern tube, and prevent the sealing mechanism from being loosened from the connection with the stern tube due to long-term impact of water flow.

[0027] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0028] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A marine stern shaft sealing structure, comprising a stern shaft and a mounting block, characterized in that A stern tube is fixedly connected to the cylindrical surface of the stern shaft. An installation block is rotatably connected to a fixing bolt, and the fixing bolt extends into the stern tube. The installation block is fixedly connected to a sealing ring, and the sealing ring is in contact with the cylindrical surface of the stern shaft. The fixing bolt is rotatably connected to a driving mechanism. A transmission mechanism is arranged inside the fixing bolt. The transmission mechanism is engaged with the driving mechanism. A limiting device is arranged inside the fixing bolt, and the limiting device is slidably connected to the transmission mechanism.

2. The marine stern shaft sealing structure according to claim 1, characterized in that, The driving mechanism includes a turning handle. The turning handle is rotatably connected to the fixing bolt. A rotating rod is fixedly connected to the contact surface between the turning handle and the fixing bolt. The rotating rod extends into the fixing bolt, and the other end of the rotating rod is fixedly connected to a driving gear. The driving gear is engaged with the transmission mechanism.

3. The marine stern shaft sealing structure according to claim 2, characterized in that, The transmission mechanism includes a sleeve. The sleeve is located inside the fixing bolt and is rotatably connected to the fixing bolt. A transmission gear is arranged on one side of the sleeve. The transmission gear is engaged with the driving gear. A plurality of limiting blocks are fixedly connected to the inner surface of the sleeve. The plurality of limiting blocks are located inside the limiting device and are in sliding contact with the limiting device.

4. A marine stern shaft sealing structure according to claim 3, characterized in that, The limiting device is a limiting screw. The limiting screw is located inside the fixing bolt and is threadedly connected to the fixing bolt. A connecting block is fixedly connected to one side of the limiting screw.

5. A marine stern shaft sealing structure according to claim 4, characterized in that The connecting block is located inside the sleeve and is in sliding contact with the sleeve. A plurality of limiting chutes are formed on the cylindrical surface of the connecting block. The plurality of limiting blocks are respectively located inside the plurality of limiting chutes and are in sliding contact with the connecting block.

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