Stern shaft sealing device for ship

Abstract

The utility model relates to the technical field of stern shaft sealing, and discloses a marine stern shaft sealing device which solves the problems that when a stern shaft is connected with a stern shaft cabin, better sealing performance is not convenient to achieve, normal work of the stern shaft is affected, and therefore better practicability is not convenient to achieve. A sealing bearing is rotationally installed on the outer side of the stern shaft body, a sealing connecting assembly is installed on the outer side of the sealing bearing and comprises a positioning sleeve, the outer side of the sealing bearing is fixedly connected with the inner wall of the positioning sleeve, the sealing bearing is located in the middle of the interior of the positioning sleeve, and a positioning baffle ring is fixedly installed on the outer side of the positioning sleeve. A sealing rubber ring is fixedly mounted on one side of the positioning baffle ring, and the sealing rubber ring is fixedly arranged on the outer side of the positioning sleeve in a sleeving manner; according to the tail shaft sealing structure, when the tail shaft is connected with the tail shaft cabin, better sealing performance can be achieved conveniently, it is ensured that the tail shaft can work normally, and therefore better practicability can be achieved conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of stern shaft sealing, in particular to a marine stern shaft sealing device. Background Art

[0002] The stern shaft, also called the tail shaft, is an important component on a ship. One end of the stern shaft is connected to the propeller, and the other end is connected to the gearbox or the coupling and then to the engine. The ship's stern shaft is a device for connecting the propeller and the power components. The sealing performance of the ship's stern shaft is an important indicator for measuring the performance of the hull. During use, the stern shaft is installed inside the tail shaft compartment. When the stern shaft is connected to the tail shaft compartment, it is not easy to achieve better sealing, which affects the normal operation of the stern shaft, making it difficult to achieve better practicality. Utility Model Content

[0003] 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, which effectively solves the problem that when the stern shaft is connected to the tail shaft compartment, it is not convenient to achieve better sealing, which affects the normal work of the stern shaft and is not convenient to achieve better practicality.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a marine stern shaft sealing device, comprising a stern shaft body, a sealing bearing is rotatably installed on the outer side of the stern shaft body, a sealing connection assembly is installed on the outer side of the sealing bearing, the sealing connection assembly comprises a positioning sleeve, and the outer side of the sealing bearing is fixedly connected to the inner wall of the positioning sleeve, the sealing bearing is located in the inner middle part of the positioning sleeve, a positioning retaining ring is fixedly installed on the outer side of the positioning sleeve, a sealing rubber ring is fixedly installed on one side of the positioning retaining ring, and the sealing rubber ring is fixedly sleeved on the outer side of the positioning sleeve, a movable retaining ring is arranged on the side of the sealing rubber ring away from the positioning retaining ring, and the movable retaining ring is slidably sleeved on the outer side of the positioning sleeve.

[0005] Preferably, a positioning connecting ring is fixedly installed on the outside of one end of the positioning sleeve, and the positioning connecting ring is located on the side of the movable retaining ring away from the sealing rubber ring, six positioning connecting blocks are evenly fixedly installed on the outside of the positioning connecting ring, and a connecting bolt is installed movably through the inside of the positioning connecting block, a circular block is fixedly installed on one end of the connecting bolt, and the circular block is located at the end of the connecting bolt away from the sealing rubber ring, and a regular hexagonal block is fixedly installed in the middle of the side of the circular block away from the connecting bolt.

[0006] Preferably, six movable connecting strips are evenly arranged on one side of the positioning connecting ring away from the movable retaining ring, and one end of the movable connecting strip is movably sleeved on the outside of the connecting bolt, and a movable connecting rod is fixedly installed on the outside of the other end of the movable connecting strip.

[0007] Preferably, six circular through holes are evenly opened inside the positioning connection ring, and one end of the six movable connection rods away from the movable connection strip is movable through the circular through holes and fixedly connected to the side of the movable retaining ring away from the sealing rubber ring.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1) During operation, through the interaction of the stern shaft body, the sealing bearing and the sealing connection assembly, the stern shaft can be connected with the tail shaft compartment to achieve better sealing, ensuring that the stern shaft can work normally, thereby achieving better practicality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] In the attached picture:

[0012] Figure 1 This is a structural schematic diagram of a marine stern shaft sealing device of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the sealing connection assembly of the utility model;

[0014] Figure 3 It is a schematic diagram of the enlarged structure of the sealing rubber ring of the utility model;

[0015] Figure 4 It is a schematic diagram of the enlarged structure of the connecting bolt part of the utility model;

[0016] Figure 5 It is a schematic diagram of the positioning connection ring structure of the utility model.

[0017] In the figure: 1, stern shaft body; 2, sealed bearing; 3, sealed connection assembly; 301, positioning sleeve; 302, positioning retaining ring; 303, sealing rubber ring; 304, movable retaining ring; 305, positioning connecting ring; 306, positioning connecting block; 307, connecting bolt; 308, circular block; 309, regular hexagonal block; 3010, movable connecting strip; 3011, movable connecting rod; 3012, circular through hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] Embodiment 1, by Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The utility model comprises a stern shaft body 1, a sealing bearing 2 is rotatably mounted on the outer side of the stern shaft body 1, and a sealing connection assembly 3 is mounted on the outer side of the sealing bearing 2;

[0020] The sealing connection assembly 3 includes a positioning sleeve 301, and the outer side of the sealing bearing 2 is fixedly connected to the inner wall of the positioning sleeve 301, the sealing bearing 2 is located in the middle of the inner part of the positioning sleeve 301, a positioning retaining ring 302 is fixedly installed on the outer side of the positioning sleeve 301, a sealing rubber ring 303 is fixedly installed on one side of the positioning retaining ring 302, and the sealing rubber ring 303 is fixedly sleeved on the outer side of the positioning sleeve 301, a movable retaining ring 304 is provided on the side of the sealing rubber ring 303 away from the positioning retaining ring 302, and the movable retaining ring 304 is slidably sleeved on the outer side of the positioning sleeve 301, a positioning connecting ring 305 is fixedly installed on the outer side of one end of the positioning sleeve 301, and the positioning connecting ring 305 is located on the side of the movable retaining ring 304 away from the sealing rubber ring 303, six positioning connecting blocks 306 are evenly fixedly installed on the outer side of the positioning connecting ring 305, and the internal movable through A connecting bolt 307 is installed through it, a circular block 308 is fixedly installed on one end of the connecting bolt 307, and the circular block 308 is located at the end of the connecting bolt 307 away from the sealing rubber ring 303, a regular hexagonal block 309 is fixedly installed in the middle of the side of the circular block 308 away from the connecting bolt 307, six movable connecting strips 3010 are evenly arranged on the side of the positioning connecting ring 305 away from the movable retaining ring 304, and one end of the movable connecting strip 3010 is movably sleeved on the outside of the connecting bolt 307, and a movable connecting rod 3011 is fixedly installed on the outside of the other end of the movable connecting strip 3010, six circular through holes 3012 are evenly penetrated inside the positioning connecting ring 305, and the ends of the six movable connecting rods 3011 away from the movable connecting strip 3010 are all movably penetrated through the circular through holes 3012 and fixedly connected to the side of the movable retaining ring 304 away from the sealing rubber ring 303.

[0021] During use, through the interaction of the stern shaft body 1, the sealing bearing 2 and the sealing connection assembly 3, the stern shaft can achieve better sealing when connected to the tail shaft compartment, ensuring that the stern shaft can work normally, thereby achieving better practicality.

[0022] Working principle: during operation, first insert one end of the positioning sleeve 301 close to the sealing rubber ring 303 into the interior of the connecting port opened on the tail shaft cabin, then align the six positioning connecting blocks 306 with the connecting holes opened on the outside of the connecting port of the tail shaft cabin, and insert one end of the connecting bolt 307 into the interior of the connecting hole, and then use a hexagonal wrench matched with the size of the regular hexagonal block 309 to drive the regular hexagonal block 309 to rotate, the regular hexagonal block 309 drives the circular block 308 to rotate, the circular block 308 drives the connecting bolt 307 to rotate, the connecting bolt 307 is rotated and threadedly inserted into the interior of the connecting hole, in the process of inserting the connecting bolt 307 into the connecting hole, the connecting bolt 307 will drive the circular block 308 to move, after the circular block 308 moves to contact with the movable connecting strip 3010, the circular block 308 will push the movable connecting strip 3010 to move, and the movable connecting strip 3010 will move. The connecting strip 3010 drives the movable connecting rod 3011 to move, and the movable connecting rod 3011 pushes the movable retaining ring 304 to move. The movable retaining ring 304 moves to squeeze the sealing rubber ring 303, causing the sealing rubber ring 303 to deform. After the six connecting bolts 307 are fully inserted into the interior of the connecting hole, the movable retaining ring 304 is evenly squeezed by the six movable connecting rods 3011, so that the movable retaining ring 304 can evenly squeeze the sealing rubber ring 303, and the sealing rubber ring 303 is squeezed and expanded. The expanded outer ring part of the sealing rubber ring 303 is squeezed and contacted with the inner wall of the connecting port, and the connecting port is sealed to complete the sealing connection operation between the stern shaft body 1 and the tail shaft compartment, so that the stern shaft can achieve better sealing when connected to the tail shaft compartment, ensuring that the stern shaft can work normally, thereby achieving better practicality.

Claims

1. A marine stern shaft sealing device, comprising a stern shaft body (1), characterized in that: A sealing bearing (2) is rotatably mounted on the outer side of the stern shaft body (1), a sealing connection assembly (3) is mounted on the outer side of the sealing bearing (2), the sealing connection assembly (3) comprises a positioning sleeve (301), and the outer side of the sealing bearing (2) is fixedly connected to the inner wall of the positioning sleeve (301), the sealing bearing (2) is located in the middle part of the inner part of the positioning sleeve (301), a positioning retaining ring (302) is fixedly mounted on the outer side of the positioning sleeve (301), a sealing rubber ring (303) is fixedly mounted on one side of the positioning retaining ring (302), and the sealing rubber ring (303) is fixedly sleeved on the outer side of the positioning sleeve (301), and a movable retaining ring (304) is arranged on the side of the sealing rubber ring (303) away from the positioning retaining ring (302), and the movable retaining ring (304) is slidably sleeved on the outer side of the positioning sleeve (301).

2. A marine stern shaft sealing device according to claim 1, characterized in that: A positioning connection ring (305) is fixedly installed on the outer side of one end of the positioning sleeve (301), and the positioning connection ring (305) is located on a side of the movable retaining ring (304) away from the sealing rubber ring (303). Six positioning connection blocks (306) are evenly fixedly installed on the outer side of the positioning connection ring (305). A connecting bolt (307) is installed movably through the inside of the positioning connection block (306). A circular block (308) is fixedly installed on one end of the connecting bolt (307), and the circular block (308) is located on an end of the connecting bolt (307) away from the sealing rubber ring (303). A regular hexagonal block (309) is fixedly installed in the middle of the side of the circular block (308) away from the connecting bolt (307).

3. A marine stern shaft sealing device according to claim 2, characterized in that: Six movable connecting strips (3010) are evenly arranged on one side of the positioning connecting ring (305) away from the movable retaining ring (304), and one end of the movable connecting strip (3010) is movably sleeved on the outside of the connecting bolt (307), and a movable connecting rod (3011) is fixedly installed on the outside of the other end of the movable connecting strip (3010).

4. A marine stern shaft sealing device according to claim 3, characterized in that: The interior of the positioning connection ring (305) is evenly penetrated by six circular through holes (3012), and one end of the six movable connection rods (3011) away from the movable connection strip (3010) is movable through the circular through hole (3012) and fixedly connected to the side of the movable retaining ring (304) away from the sealing rubber ring (303).

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