Sliding locking type ship tail shaft sealing structure

Abstract

The utility model discloses a sliding locking type ship stern shaft sealing structure, which belongs to the technical field of ship stern shaft sealing, and comprises a connecting sealing component and a sliding sealing component, the sliding sealing component is inserted in the connecting sealing component, the connecting sealing component consists of an external base tube, a mounting flange and a rubber sealing ring, the installation flange is fixedly installed at one end of the external base pipe, the rubber sealing ring is fixedly installed on the inner wall of the external base pipe, and the sliding sealing assembly is composed of a movable base ring, an arc-shaped connecting plate, a first insertion pipe, a first sealing ring, a second sealing ring and a second insertion pipe. The sliding sealing assembly is inserted into the connecting sealing assembly in a sliding mode, so that the sliding sealing assembly is matched with the connecting sealing assembly, good sealing can be provided for the ship stern shaft body, and the probability that seawater, silt and other impurities enter a stern shaft tube to damage a bearing and a sealing part can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ship stern shaft sealing, in particular to a sliding locking type ship stern shaft sealing structure. Background Art

[0002] The stern shaft, also known as the tail shaft, is the last section of a ship's shafting system. It connects to the intermediate shaft and supports the propeller. The flange at the forward end of the stern shaft is connected to the intermediate shaft flange with tight-fitting bolts. The tail end is conical, facilitating propeller installation. Typically forged from high-quality carbon steel, it is mounted on two bearings: the stern bearing, which is in contact with the hull and water, and the forward bearing, which connects to the engine room. The space between these two bearings is essentially a sealed stern shaft compartment. To prevent water infiltration, rubber seals are installed next to the forward and backward bearings. Oil is used to fill the space between the seals to balance water pressure and lubricate the seals. The stern shaft is crucial in a ship's propulsion system, and its stability and sealing performance are directly related to the ship's navigational safety and efficiency. The stern shaft must have excellent sealing performance. Poor sealing can allow impurities such as seawater and silt to enter the stern tube, damaging the bearings and seal components, and ultimately affecting the ship's normal navigation. Therefore, a sliding and locking stern shaft seal structure is required. Utility Model Content

[0003] The main purpose of the utility model is to provide a sliding locking type ship stern shaft sealing structure, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A sliding and locking ship stern shaft sealing structure includes a connecting sealing component and a sliding sealing component. The sliding sealing component is inserted into the connecting sealing component. The connecting sealing component consists of an external base pipe, a mounting flange and a rubber sealing ring. The mounting flange is fixedly mounted on one end of the external base pipe. The rubber sealing ring is fixedly mounted on the inner wall of the external base pipe. The sliding sealing component consists of a movable base ring, an arc-shaped connecting plate, a first insert pipe, a first sealing ring, a second sealing ring and a second insert pipe. There are several arc-shaped connecting plates and they are symmetrically fixedly mounted on one end of the movable base ring. The first insert pipe, the first sealing ring and the second insert pipe are fixedly mounted on the other end of the movable base ring. The second sealing ring is fixedly mounted on one end of the first insert pipe.

[0006] Preferably, a sealing slot and a first annular groove are formed on one end of the external base pipe on the connection sealing assembly away from the mounting flange, and a second annular groove is formed on the inner wall of the sealing slot.

[0007] Preferably, the sealing slot is located inside the first annular groove, and the sealing slot, the first annular groove and the second annular groove are coaxial.

[0008] Preferably, the movable base ring on the sliding seal assembly is slidably sleeved on the ship's stern shaft body, a mounting hole is opened on the arc-shaped connecting plate, and the arc-shaped connecting plate is fixedly mounted on the outer wall of the ship's stern shaft body by bolts.

[0009] Preferably, the second insert tube on the sliding seal assembly is inserted into the external base tube, and the outer wall of the second insert tube is in contact with the rubber sealing ring.

[0010] Preferably, an annular lubricating oil groove is provided on the outer wall of the first insert tube on the sliding seal assembly, and the first insert tube is inserted into the sealing slot, the second sealing ring is inserted into the second annular groove, and the first sealing ring is inserted into the first annular groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By setting up a sealing structure consisting of a sliding sealing component and a connecting sealing component, the sliding sealing component can be slidably inserted into the connecting sealing component, so that the sliding sealing component and the connecting sealing component cooperate to provide a good seal for the ship's stern shaft body, thereby reducing the probability of impurities such as seawater and mud entering the stern shaft tube and damaging the bearings and sealing components; at the same time, the sliding sealing component and the connecting sealing component can be slidably adjusted on the ship's stern shaft body, so that the sealing structure can change its position according to actual needs, greatly increasing the scope of application of this sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the cross-section structure of the connection and sealing assembly of the present invention;

[0015] Figure 3 This is a schematic structural diagram of the sliding seal assembly of the present invention;

[0016] Figure 4 This is a schematic structural diagram of the cross-section of the external base pipe and the mounting flange of the present invention.

[0017] In the figure: 1. Sliding seal assembly; 2. Connecting seal assembly; 3. Ship stern shaft body; 4. Moving base ring; 5. Arc-shaped connecting plate; 6. First insert pipe; 7. First sealing ring; 8. Second sealing ring; 9. Second insert pipe; 10. Annular lubricating oil groove; 11. External base pipe; 12. Mounting flange; 13. Rubber sealing ring; 14. Sealing slot; 15. Second annular groove; 16. First annular groove. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, a sliding closed-type ship stern shaft sealing structure includes a connecting sealing component 2 and a sliding sealing component 1. The sliding sealing component 1 is inserted into the connecting sealing component 2. The connecting sealing component 2 consists of an external base pipe 11, a mounting flange 12 and a rubber sealing ring 13. The mounting flange 12 is fixedly mounted on one end of the external base pipe 11. The rubber sealing ring 13 is fixedly mounted on the inner wall of the external base pipe 11. The sliding sealing component 1 consists of a mobile base ring 4, an arc-shaped connecting plate 5, a first insert pipe 6, a first sealing ring 7, a second sealing ring 8 and a second insert pipe 9. There are several arc-shaped connecting plates 5 and they are symmetrically fixed on one end of the mobile base ring 4. The first insert pipe 6, the first sealing ring 7 and the second insert pipe 9 are fixedly mounted on the other end of the mobile base ring 4. The second sealing ring 8 is fixedly mounted At one end of the first insert tube 6, when in use, the connecting sealing component 2 can be fixed on the hull, and the sliding sealing component 1 can be inserted into the connecting sealing component 2. Finally, by setting a sealing structure composed of the sliding sealing component 1 and the connecting sealing component 2, the sliding sealing component 1 can be slidably inserted into the connecting sealing component 2, so that the sliding sealing component 1 and the connecting sealing component 2 cooperate to provide a good seal for the ship's stern shaft body 3, thereby reducing the probability of impurities such as seawater and mud entering the interior of the stern shaft tube and damaging the bearings and sealing components. At the same time, the sliding sealing component 1 and the connecting sealing component 2 can slide and adjust their positions on the ship's stern shaft body 3, so that the sealing structure can change its position according to actual needs, greatly increasing the scope of application of this sealing structure.

[0020] Furthermore, a sealing slot 14 and a first annular groove 16 are provided at one end of the external base pipe 11 on the connection sealing assembly 2 away from the mounting flange 12. A second annular groove 15 is provided on the inner wall of the inner side of the sealing slot 14. The sealing slot 14 is located on the inner side of the first annular groove 16, and the sealing slot 14, the first annular groove 16 and the second annular groove 15 are coaxial. The movable base ring 4 on the sliding sealing assembly 1 is slidably sleeved on the ship's stern shaft body 3, and a mounting hole is provided on the arc-shaped connecting plate 5, which is fixed to the ship's stern shaft by bolts. On the outer wall of the main body 3, the second insert tube 9 on the sliding seal assembly 1 is inserted into the external base tube 11, and the outer wall of the second insert tube 9 is in contact with the rubber sealing ring 13. An annular lubricating oil groove 10 is provided on the outer wall of the first insert tube 6 on the sliding seal assembly 1, and the first insert tube 6 is inserted into the sealing slot 14, the second sealing ring 8 is inserted into the second annular groove 15, and the first sealing ring 7 is inserted into the first annular groove 16. When in use, lubricating oil can be filled in the annular lubricating oil groove 10, and the sliding seal assembly 1 and the connecting seal assembly 2 can be connected at the stern of the ship. The sliding position is adjusted on the shaft body 3. After the sliding seal assembly 1 is inserted into the connecting seal assembly 2, the mounting flange 12 on the connecting seal assembly 2 can be fixed to the hull with bolts, and the bolts are passed through the mounting holes opened on the arc-shaped connecting plate 5 to fix the arc-shaped connecting plate 5 to the outer wall of the ship's stern shaft body 3. When the ship's stern shaft body 3 rotates, the ship's stern shaft body 3 will drive the sliding seal assembly 1 to rotate. Since the connecting seal assembly 2 is fixed to the hull, the connecting seal assembly 2 will not rotate with the sliding seal assembly 1. In the process of relative rotation between the connecting seal assembly 2 and the sliding seal assembly 1, the lubricating oil filled in the annular lubricating oil groove 10 can play a role in assisting in sealing the gap between the connecting seal assembly 2 and the sliding seal assembly 1. At the same time, the lubricating oil filled in the annular lubricating oil groove 10 can also lubricate the local contact parts of the connecting seal assembly 2 and the sliding seal assembly 1, thereby reducing the wear of the connecting seal assembly 2 and the sliding seal assembly 1 when the connecting seal assembly 2 and the sliding seal assembly 1 rotate relative to each other.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The scope of protection claimed in this utility model is defined by the attached claims and their equivalents.

Claims

1. A sliding locking type ship stern shaft sealing structure, characterized by: The invention comprises a connecting sealing component (2) and a sliding sealing component (1), wherein the sliding sealing component (1) is inserted into the connecting sealing component (2), wherein the connecting sealing component (2) is composed of an external base pipe (11), a mounting flange (12) and a rubber sealing ring (13), wherein the mounting flange (12) is fixedly mounted on one end of the external base pipe (11), and the rubber sealing ring (13) is fixedly mounted on the inner wall of the external base pipe (11), and the sliding sealing component (1) is composed of a movable base ring (4), an arc-shaped connecting plate (5), a first insert pipe (6), a first sealing ring (7), a second sealing ring (8) and a second insert pipe (9), wherein the arc-shaped connecting plate (5) has a plurality of pieces and is symmetrically fixedly mounted on one end of the movable base ring (4), the first insert pipe (6), the first sealing ring (7) and the second insert pipe (9) are fixedly mounted on the other end of the movable base ring (4), and the second sealing ring (8) is fixedly mounted on one end of the first insert pipe (6).

2. The sliding locking ship stern shaft sealing structure according to claim 1, characterized in that: A sealing slot (14) and a first annular groove (16) are provided on the end of the external base pipe (11) on the connection sealing assembly (2) away from the mounting flange (12), and a second annular groove (15) is provided on the inner wall of the sealing slot (14).

3. The sliding locking ship stern shaft sealing structure according to claim 2, characterized in that: The sealing slot (14) is located inside the first annular groove (16), and the sealing slot (14), the first annular groove (16) and the second annular groove (15) are coaxial.

4. The sliding locking ship stern shaft sealing structure according to claim 3, characterized in that: The movable base ring (4) on the sliding seal assembly (1) is slidably sleeved on the ship's stern shaft body (3); a mounting hole is provided on the arc-shaped connecting plate (5); and the arc-shaped connecting plate (5) is fixedly mounted on the outer wall of the ship's stern shaft body (3) by means of bolts.

5. The sliding locking ship stern shaft sealing structure according to claim 4, characterized in that: The second insert tube (9) on the sliding seal assembly (1) is inserted into the external base tube (11), and the outer wall of the second insert tube (9) is in contact with the rubber sealing ring (13).

6. The sliding locking ship stern shaft sealing structure according to claim 5, characterized in that: An annular lubricating oil groove (10) is provided on the outer wall of the first insert tube (6) on the sliding seal assembly (1), and the first insert tube (6) is inserted into the sealing slot (14), the second sealing ring (8) is inserted into the second annular groove (15), and the first sealing ring (7) is inserted into the first annular groove (16).

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