A polar-level high-power pod propeller shaft sealing mechanism

Abstract

The present application provides a polar-level high-power pod propeller shaft sealing mechanism, which relates to the field of propeller shaft sealing technology, including a propeller shaft, a sleeve installed on the periphery of the propeller shaft, and a sealing assembly installed on the periphery of the sleeve; the sealing assembly includes a sealing skeleton, and the inside of the sealing skeleton is respectively provided with a first sealing chamber, a second sealing chamber, a third sealing chamber, a fourth sealing chamber and a fifth sealing chamber from left to right; the first sealing chamber is filled with grease; the second sealing chamber and the third sealing chamber are filled with gravity oil; the fourth sealing chamber is set as a leakage recovery channel; the fifth sealing chamber is filled with lubricating oil; a cavity is set between the fourth sealing chamber and the fifth sealing chamber. The technology of the present invention effectively improves the effect and cycle of propeller shaft sealing protection, improves the working ability in polar working environment, and prevents the sealing structure from being damaged prematurely, resulting in shortening the propeller shaft maintenance cycle and generating economic costs or causing serious consequences of water leakage in the cabin.

Description

Technical Field

[0001] The invention relates to the technical field of propeller shaft sealing, and in particular to a polar-level high-power pod propeller shaft sealing mechanism. Background Art

[0002] The pod propeller shaft sealing mechanism is a key component in the ship's pod propulsion system. It is responsible for ensuring that the propeller shaft is isolated from the outside world and preventing seawater from entering the ship.

[0003] Existing solutions generally adopt a multi-sealed structure and use gravity oil for sealing. The sealing effect is limited. Generally, there are only two sealing structures. The two sealing structures must be repaired after being damaged. In addition, during use, the internal and external pressure difference is large, resulting in a single-sided pressure increase, greater friction, and a reduced lifespan. In polar working environments, it may cause poor environmental adaptability, resulting in frequent repairs or direct leakage.

[0004] In order to solve the above problems, we propose a polar-level high-power pod propeller shaft sealing mechanism to solve the above problems. Summary of the invention

[0005] In order to solve the problems in the background technology, the present invention provides a polar-level high-power pod propeller shaft sealing mechanism.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to effectively improve the effect and period of the propeller shaft sealing protection, improve the working ability in the polar working environment, prevent the sealing structure from being damaged prematurely, resulting in the shortening of the propeller shaft maintenance cycle and generating economic costs or causing serious consequences of water leakage in the cabin.

[0007] A propeller shaft sealing mechanism for a polar-level high-power pod comprises a propeller shaft, a sleeve is installed on the periphery of the propeller shaft, and a sealing assembly is installed on the periphery of the sleeve; The sealing assembly comprises a sealing frame, and the sealing frame is provided with a first sealing chamber, a second sealing chamber, a third sealing chamber, a fourth sealing chamber and a fifth sealing chamber from left to right; The first sealed chamber is filled with grease; the second sealed chamber and the third sealed chamber are filled with gravity oil; the fourth sealed chamber is set as a leakage recovery channel; the fifth sealed chamber is filled with lubricating oil; and a cavity is set between the fourth sealed chamber and the fifth sealed chamber.

[0008] Preferably, a flange is provided in the middle of the right end of the sealing frame, and the flange is fixedly mounted on the outer periphery of the right end of the sleeve.

[0009] Preferably, an oil pipe channel is opened in the middle of the inner side of the flange, and the outside of the oil pipe channel is connected to an air supply module including an air pump, and the air supply module transports gas into the cavity through the oil pipe channel.

[0010] Preferably, the outlet end of the oil pipe channel is connected to the top of the cavity, and a negative pressure recovery pipeline is provided at the bottom of the cavity.

[0011] Preferably, the fifth sealed chamber is located in the middle of the inner side of the flange.

[0012] Preferably, a sealing ring is installed on the outer periphery of the left end of the sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, five sealed chambers are provided, among which the first sealed chamber, the second sealed chamber, the third sealed chamber and the fourth sealed chamber gradually play a role in preventing seawater from entering the outside, while the fifth sealed chamber plays a role in preventing lubricating oil leakage from entering the inside. During use, the internal and external pressure difference is effectively controlled, the friction is small, and the service life is improved. In the polar working environment, the environmental adaptability is strong, and frequent maintenance and accidental water leakage in the cabin are avoided. At the same time, the cavity is connected to an oil-water collection mechanism through a negative pressure recovery pipeline, so that any possible leakage can be pumped away in time, achieving a pollution-free and zero-leakage sealing effect, effectively preventing water from entering the pod bearing unit, and avoiding the risk of emulsification of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0015] In the figure: 1. propeller shaft; 2. sleeve; 3. sealing frame; 31. first sealing chamber; 32. second sealing chamber; 33. third sealing chamber; 34. fourth sealing chamber; 35. fifth sealing chamber; 36. cavity; 4. flange; 5. oil pipe channel; 6. sealing ring. DETAILED DESCRIPTION

[0016] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows: Example: Refer to Figure 1 - Figure 2 As shown, a propeller shaft sealing mechanism of a polar-level high-power pod in this embodiment includes a propeller shaft 1, a sleeve 2 is installed on the periphery of the propeller shaft 1, and a sealing assembly is installed on the periphery of the sleeve 2; The sealing assembly includes a sealing frame 3, and the sealing frame 3 is provided with a first sealing chamber 31, a second sealing chamber 32, a third sealing chamber 33, a fourth sealing chamber 34 and a fifth sealing chamber 35 from left to right. The first sealed chamber 31 is filled with grease; the second sealed chamber 32 and the third sealed chamber 33 are filled with gravity oil; the fourth sealed chamber 34 is configured as a leakage recovery channel, and the fourth sealed chamber 34 forms a negative pressure after compressing the air, so that the liquid leaked from the third sealed chamber 33 can be recovered.

[0017] The first sealed chamber 31, the second sealed chamber 32, the third sealed chamber 33 and the fourth sealed chamber 34 can gradually seal the propeller shaft 1 to prevent seawater, and the gravity oil filled therein has high environmental protection requirements and will not pollute the environment.

[0018] The fifth sealed chamber 35 is filled with lubricating oil; a cavity 36 is arranged between the fourth sealed chamber 34 and the fifth sealed chamber 35, a flange 4 is arranged in the middle of the right end of the sealing skeleton 3, and the flange 4 is fixedly installed on the outer periphery of the right end of the sleeve 2; an oil pipe channel 5 is opened in the middle of the inner side of the flange 4, and the outside of the oil pipe channel 5 is connected to an air supply module, including an air pump, and the air supply module transports gas to the cavity 36 through the oil pipe channel 5; the outlet end of the oil pipe channel 5 is connected to the top of the cavity 36, and a negative pressure recovery pipeline is arranged at the bottom of the cavity 36.

[0019] Among them, the cavity 36 can collect the leaked lubricating oil and recycle it through the negative pressure recovery pipe. At the same time, the negative pressure recovery pipe is connected to an oil-water collection mechanism, so that any possible leakage can be drawn away in time, achieving a pollution-free and zero-leakage sealing effect.

[0020] In some examples, the real-time working status of the sealing system is confirmed by monitoring the high / low liquid level alarm of the sealed oil tank and the high liquid level alarm of the air pressure and the oil-water collection mechanism.

[0021] In some examples, the fifth sealed chamber 35 is located in the middle of the inner side of the flange 4 .

[0022] In some examples, a sealing ring 6 is installed on the periphery of the left end of the sleeve 2, which mainly plays a role in preventing mud and sand.

[0023] The working principle of the present invention is: The present invention is provided with five sealed chambers, wherein the first sealed chamber 31, the second sealed chamber 32, the third sealed chamber 33, and the fourth sealed chamber 34 gradually play the role of preventing seawater, and the fifth sealed chamber 35 plays the role of preventing lubricating oil leakage internally. In addition, an end face sealing ring 6 is provided on the outside to prevent mud and sand. During use, the internal and external pressure difference is effectively controlled, the friction is small, the service life is increased, and in the polar working environment, the environmental adaptability is strong, and frequent maintenance and accidental water leakage in the cabin are avoided.

[0024] Among them, the cavity 36 is connected to the oil-water collection mechanism through a negative pressure recovery pipe, which effectively prevents water from entering the pod bearing unit and avoids the risk of emulsification of the lubricating oil. The fifth sealing chamber 35 is sealed with lubricating oil, and the fourth sealing chamber 34 is sealed with gravity oil lubrication, which extends the service life of the sealing lip, reduces the number of times the propeller shaft 1 seal is replaced, reduces maintenance work time, and saves manpower and material resources.

[0025] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A polar-level high-power pod propeller shaft sealing mechanism, characterized in that: It comprises a propeller shaft (1), a sleeve (2) is mounted on the periphery of the propeller shaft (1), and a sealing assembly is mounted on the periphery of the sleeve (2); The sealing assembly comprises a sealing frame (3), wherein the sealing frame (3) is provided with a first sealing chamber (31), a second sealing chamber (32), a third sealing chamber (33), a fourth sealing chamber (34) and a fifth sealing chamber (35) from left to right. The first sealed chamber (31) is filled with lubricating grease; The second sealed chamber (32) and the third sealed chamber (33) are filled with gravity oil; The fourth sealed chamber (34) is configured as a leakage recovery channel; The fifth sealed chamber (35) is filled with lubricating oil; A cavity (36) is provided between the fourth sealed chamber (34) and the fifth sealed chamber (35).

2. The polar-level high-power pod propeller shaft sealing mechanism according to claim 1, characterized in that: A flange (4) is provided in the middle of the right end of the sealing frame (3), and the flange (4) is fixedly mounted on the outer periphery of the right end of the sleeve (2).

3. The polar-level high-power pod propeller shaft sealing mechanism according to claim 2 is characterized in that: An oil pipe passage (5) is provided in the middle of the inner side of the flange (4), and an air supply module including an air pump is connected to the outside of the oil pipe passage (5). The air supply module delivers gas to the cavity (36) through the oil pipe passage (5).

4. The polar-level high-power pod propeller shaft sealing mechanism according to claim 3 is characterized in that: The outlet end of the oil pipe channel (5) is connected to the top of the cavity (36), and a negative pressure recovery pipeline is provided at the bottom of the cavity (36).

5. The polar-level high-power pod propeller shaft sealing mechanism according to claim 4, characterized in that: The fifth sealed chamber (35) is located in the middle of the inner side of the flange (4).

6. The polar-level high-power pod propeller shaft sealing mechanism according to claim 5, characterized in that: A sealing ring (6) is installed on the outer periphery of the left end of the sleeve (2).

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