A semi-submersible propulsive device with a seal capable of being monitored for its sealing performance

Abstract

The application relates to a semi-submerged propeller propulsion device capable of monitoring the sealing performance of a sealing element, comprising a driving assembly, a propelling assembly and a connecting assembly; the driving assembly comprises a fixed shell and an output shaft, and the fixed shell is internally provided with an accommodating space for accommodating the output shaft; the propelling assembly comprises a propeller unit and a connecting element, one end of the propeller unit is connected with the output shaft in the accommodating space to form a power connecting part, and the connecting element is movably connected in a second mounting part; the sealing unit comprises a sealing element for sealing the power connecting part in the accommodating space, a detection part connected with the sealing element, a storage part electrically connected with the detection part, a judgment part and an output part; the detection part is used for detecting actual sealing data of the sealing element to the accommodating space, the storage part is used for storing initial data, and the judgment part is used for judging the sealing working condition of the accommodating space according to the actual sealing data and the initial data. The sealing unit can improve the sealing effect of the power connecting part, and effectively improves the working performance and service life of the semi-submerged propeller propulsion device capable of monitoring the sealing performance of the sealing element.

Description

[0001] This application is a divisional application of the invention entitled “Semi-submerged propeller propulsion device with sealing function”, filed on April 28, 2023, with application number CN202310483356.4. Technical Field

[0002] This application relates to the field of semi-submerged propeller technology, and in particular to a semi-submerged propeller propulsion device capable of monitoring the sealing performance of seals. Background Technology

[0003] Semi-submerged propeller propulsion systems capable of monitoring the sealing performance of seals typically include a fixed mounting assembly, a propeller propulsion assembly, and a connecting assembly for attaching the propeller propulsion assembly to the fixed mounting assembly. The power output end of the fixed mounting assembly is located within the hull and mates with one end of the propeller propulsion assembly, forming a power connection. This power connection needs to operate in a dry environment to ensure safe and effective power transmission. Therefore, the sealing structure of the power connection plays a crucial role in the operation of semi-submerged propeller propulsion systems capable of monitoring the sealing performance of seals.

[0004] Currently, most power connection units utilize O-rings for sealing. During the continuous long-term oscillation of the propeller propulsion assembly, especially when it oscillates repeatedly with large angles up and down and left and right with multiple degrees of freedom, the O-rings will wear or twist. Wear or twisting will lead to seal failure. If the seal failure is not addressed in time, it will affect the working performance and service life of the semi-submerged propeller propulsion device, which can monitor the sealing performance of the seals. Summary of the Invention

[0005] Based on this, the embodiments of this application provide a semi-submerged propeller propulsion device that can monitor the sealing performance of the seal, which can improve the sealing effect of the power connection and effectively improve the working performance and service life of the semi-submerged propeller propulsion device that can monitor the sealing performance of the seal.

[0006] This application provides a semi-submerged propeller propulsion device for monitoring the sealing performance of a seal, comprising: a drive assembly including a fixed housing and an output shaft passing through the fixed housing; the fixed housing including a first mounting portion connected to a stern plate and a second mounting portion disposed opposite to the first mounting portion, with a receiving space between the first mounting portion and the second mounting portion to accommodate the output shaft; and a propulsion assembly, which is drively connected to the output shaft, the propulsion assembly including a blade unit and a connecting member connected to the blade unit; one end of the blade unit is disposed within the receiving space and connected to the output shaft to form a power connection portion; the connecting member is disposed on the second mounting portion. The unit is internally connected to and movably connected to the second mounting part; and a connecting assembly, disposed between the connecting part and the second mounting part, includes a sealing unit. The sealing unit includes a sealing element, a detection part connected to the sealing element, and a storage part, a judgment part, and an output part electrically connected to the detection part. The sealing element is movably connected to the connecting part and installed within the second mounting part to seal the connecting part within the receiving space. The detection part detects the actual sealing data of the sealing element within the receiving space, the storage part stores initial data, the judgment part judges the sealing condition of the receiving space based on the actual sealing data and the initial data, and the output part outputs the sealing condition data. This sealing unit enables real-time monitoring of the sealing condition, and can detect and output the actual sealing effect of the sealing element during use. This allows users to understand the sealing condition of the receiving space in real time and maintain the sealing condition promptly, improving the working performance and service life of the semi-submerged propeller propulsion device that can monitor the sealing performance of the sealing element.

[0007] In other embodiments, the detection unit includes a first position detector disposed within the seal. The connector includes an outer surface facing the seal, and the seal includes a first side surface facing the connector. The first position detector detects a first actual distance between the first side surface and the outer surface. The actual sealing data is the first actual distance, and the initial data is the first initial distance between the first side surface and the outer surface detected by the first position detector for the first time. When the first actual distance exceeds the first initial distance by 1 mm, the determination unit determines that the seal has failed. By setting the first position detector on the first side surface, failure conditions caused by wear of the seal can be effectively detected, improving the accuracy of monitoring the sealing condition of the accommodating space.

[0008] In other embodiments, the detection unit includes a second position detector disposed within the seal. The second mounting portion includes an inner surface facing the seal, and the seal includes a second side surface facing the second mounting portion. The second position detector is used to detect a second actual distance between the second side surface and the inner surface. The actual sealing data is the second actual distance, and the initial data is the second initial distance between the second side surface and the inner surface detected by the second position detector for the first time. When the second actual distance exceeds the second initial distance by 0.5 mm, the judgment unit determines that the seal has failed. By setting a second position detector on the second side surface of the seal, failure conditions caused by seal twisting can be effectively detected, improving the accuracy of monitoring the sealing condition of the accommodating space.

[0009] In other embodiments, the connecting assembly further includes an adjusting ring for fixing the sealing unit. The adjusting ring is detachably connected to the second mounting portion and abuts against the sealing element to fix the sealing element. The detection portion includes a pressure detector disposed between the sealing element and the adjusting ring for detecting the actual compressive force between the adjusting ring and the sealing element. The actual sealing data is the actual compressive force, and the initial data is a preset pressure threshold. When the actual compressive force is less than the pressure threshold, the judgment portion determines that the sealing element has failed. By setting a pressure detector on the third side of the sealing element, the working conditions of wear or twisting of the sealing element can be effectively detected, improving the accuracy of monitoring the sealing condition of the accommodating space.

[0010] In other embodiments, the seal includes a first sealing layer and a second sealing layer connected to the first sealing layer. The first sealing layer is for contacting the second mounting portion, and the second sealing layer is for contacting the connector. The material of the first sealing layer is different from the material of the second sealing layer. Setting the material of the first sealing layer to be different from the material of the second sealing layer can improve the adaptability of the seal to complex working conditions.

[0011] In other embodiments, the second sealing layer is made of a wear-resistant material. This arrangement allows the seal to better adapt to complex friction conditions and improves the sealing effect on the accommodating space.

[0012] In other embodiments, the seal includes a mounting surface facing the connector, the shape of which is adapted to the shape of the outer surface of the connector. A seal with a first curved side increases the contact area with the outer surface of the connector, not only better fitting and pressing against the outer surface of the connector, but also reducing the occurrence of twisting, effectively improving the sealing effect.

[0013] In other embodiments, the seal has rounded corners between adjacent sides. This design reduces friction between the seal and other components, minimizes seal wear, and improves sealing performance.

[0014] In other embodiments, the output unit includes an alarm that outputs a prompt sound based on the sealing condition data. This configuration better alerts the user to the real-time sealing condition of the containment space and enables timely maintenance, thereby improving the performance and service life of the semi-submerged propeller propulsion device that monitors the sealing performance of the seals.

[0015] In other embodiments, the output unit includes at least one mobile terminal for synchronously outputting the sealing condition data. By setting multiple mobile terminals, users can more conveniently understand and maintain the sealing condition of the containment space in a timely manner. This arrangement improves the flexibility of the output unit in outputting sealing conditions, thereby better enhancing the working performance and service life of the semi-submerged propeller propulsion device that can monitor the sealing performance of the seals.

[0016] An embodiment of this application provides a semi-submerged propeller propulsion device capable of monitoring the sealing performance of a sealing element. This device includes a sealing unit disposed between a connecting member and a second mounting portion. The sealing unit comprises a sealing element, a detection unit connected to the sealing element, and a storage unit, a judgment unit, and an output unit electrically connected to the detection unit. The sealing element is movably connected to the connecting member and installed within the second mounting portion to seal the power connection portion within a receiving space. The detection unit detects the actual sealing data of the sealing element within the receiving space and can detect and output the actual sealing effect of the sealing element during use in real time. The judgment unit determines the sealing condition of the receiving space based on the actual sealing data collected by the detection unit and the initial data in the storage unit, and outputs the real-time sealing condition through the output unit, thus achieving real-time monitoring of the sealing condition. This sealing unit allows users to easily understand the sealing condition of the receiving space in real time and maintain the sealing condition promptly, improving the working performance and service life of the semi-submerged propeller propulsion device capable of monitoring the sealing performance of the sealing element. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a semi-immersed propeller propulsion device capable of monitoring the sealing performance of the seal in an embodiment of this application;

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0019] Figure 3 for Figure 2 A magnified view of a portion of point B in the middle. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] See Figures 1 to 2 One embodiment of this application provides a semi-submerged propeller propulsion device 1 for monitoring the sealing performance of a seal, including a drive assembly 10, a propulsion assembly 20 driven by the drive assembly 10, and a connecting assembly 30 disposed between the drive assembly 10 and the propulsion assembly 20. The drive assembly 10 includes a fixed housing 11 and an output shaft (not shown) passing through the fixed housing 11. The fixed housing 11 includes a first mounting portion 111 connected to the stern plate 2 and a second mounting portion 112 disposed opposite to the first mounting portion 111. A receiving space is provided between the first mounting portion 111 and the second mounting portion 112 to accommodate the output shaft. The output shaft passes through the fixed housing 11 from the end where the first mounting portion 111 is located and extends toward the second mounting portion 112. The propulsion assembly 20 includes a blade unit 21 and a connector 22 connected to the blade unit 21. One end of the blade unit 21 is disposed in the receiving space and driven by the output shaft to form a power connection portion. The connector 22 is disposed in the second mounting portion 112 and movably connected to the second mounting portion 112. The connection assembly 30 includes a sealing unit 31, which includes a sealing element 310, a detection unit 311 connected to the sealing element 310, and a storage unit, a judgment unit, and an output unit electrically connected to the detection unit 311. The storage unit, judgment unit, and output unit can be located inside the hull and are not shown in the figure. The sealing element 310 is movably connected to the connector 22 and installed in the second mounting part 112 to seal the power connection part in the receiving space. The detection unit 311 is used to detect the actual sealing data of the sealing element 310 to the receiving space. The storage unit is used to store the initial data. The judgment unit is used to determine the sealing condition of the receiving space based on the actual sealing data and the initial data. The output unit is used to output the sealing condition. In the semi-submerged propeller propulsion device 1 that can monitor the sealing performance of the seal, the sealing unit 31, compared with the conventional sealing structure, also includes a detection unit 311 and a storage unit, a judgment unit, and an output unit electrically connected to the detection unit 311. The sealing unit 31 can realize real-time monitoring of the sealing condition, and can detect and output the actual sealing effect of the seal 310 during use in real time. This makes it convenient for users to understand the sealing condition of the accommodating space in real time and maintain the sealing condition in a timely manner, thereby improving the working performance and service life of the semi-submerged propeller propulsion device 1 that can monitor the sealing performance of the seal.

[0022] In one embodiment, the detection unit 311 includes a first position detector 3111 disposed in the seal 310. The connector 22 includes an outer surface facing the seal 310, and the seal 310 includes a first side surface 3101 facing the connector 22. The first position detector 3111 is used to detect a first actual distance between the first side surface 3101 and the outer surface of the connector 22. In this embodiment, the detection unit 311 is used to detect the actual sealing data of the seal 310 to the accommodating space as the measured first actual distance. The initial data of the storage unit is the first initial distance between the first side surface 3101 and the outer surface of the connector 22 detected by the first position detector 3111 for the first time. The judgment unit analyzes the first actual distance and the first initial distance. When the actual distance exceeds the first initial distance by 1 mm, the seal 310 is determined to be ineffective. During the operation of the semi-submerged propeller propulsion device 1, which can monitor the sealing performance of the seal, the relative movement between the first side 3101 of the seal 310 and the connector 22 is the most frequent and complex. The first side 3101 is most prone to wear. Real-time detection of the distance between the first side 3101 and the outer surface of the connector 22 can more clearly reflect the wear condition of the seal 310. By setting the first position detector 3111 on the first side 3101, the failure condition caused by the wear of the seal 310 can be effectively detected, thereby improving the accuracy of monitoring the sealing condition of the accommodating space.

[0023] In one embodiment, the detection unit 311 includes a second position detector 3112 disposed in the seal 310. The second mounting portion 112 includes an inner surface facing the seal 310, and the seal 310 includes a second side surface 3102 facing the second mounting portion 112. The second position detector 3112 is used to detect a second actual distance between the second side surface 3102 and the inner surface of the second mounting portion 112. In this embodiment, the detection unit 311 detects the actual sealing data of the seal 310 to the accommodating space as the second actual distance, and the initial data of the storage unit is the second initial distance between the second side surface 3102 and the inner surface of the second mounting portion 112 first detected by the second position detector 3112. The judgment unit analyzes the second actual distance and the second initial distance, and when the second actual distance exceeds the second initial distance by 0.5 mm, it determines that the seal has failed. During the operation of the semi-submerged propeller propulsion device 1, which can monitor the sealing performance of the seal, the propulsion assembly 20 needs to perform various swinging movements to meet the hull's operational requirements. The connecting member 22 in the propulsion assembly 20 is prone to causing the seal 310 to twist during its relative movement. Detecting the distance between the second side 3102 of the seal 310 and the inner surface of the second mounting part 112 can more clearly reflect the twisting condition of the seal 310. By setting a second position detector 3112 on the second side 3102 of the seal 310, the failure condition caused by the twisting of the seal 310 can be effectively detected, thus improving the accuracy of monitoring the sealing condition of the accommodating space.

[0024] In one embodiment, the connecting assembly 30 further includes an adjusting ring 32 for fixing the sealing unit 31. The adjusting ring 32 is detachably connected to the second mounting portion 112 and abuts against the sealing member 310 to fix the sealing member 310. The detection portion 311 includes a pressure detector 3113, which is connected to the third side 3103 of the sealing member 310 for contacting the adjusting ring 32 to detect the actual squeezing force generated by the adjusting ring 32 on the sealing member 310. In this embodiment, the detection portion 311 detects the actual sealing data of the sealing member 310 on the accommodating space as the actual squeezing force. The initial data of the storage portion is a preset pressure threshold. The judgment portion analyzes the actual squeezing force and the preset pressure threshold. When the actual squeezing force is less than the pressure threshold, the judgment portion determines that the sealing member 310 has failed to seal. The seal 310 has a certain degree of elasticity during use. Under the action of extrusion pressure, the seal 310 can better fill various gaps in the installation space, thereby producing a better sealing effect. When the seal 310 is worn or twisted, the extrusion pressure on the third side 3103 will change. By setting a pressure detector 31113 on the third side 3103 of the seal 310, the wear or twisting condition of the seal 310 can be effectively detected, improving the accuracy of monitoring the sealing condition of the accommodating space. Furthermore, the pressure detector 3113 can also detect the initial extrusion pressure generated by the adjusting ring 32 on the seal 310 during installation. Excessive initial extrusion pressure may cause the seal 310 to lose elasticity and become more susceptible to wear, while insufficient initial extrusion pressure may cause insufficient filling of gaps in the installation space, thereby reducing the sealing effect. The pressure detector 3113 can effectively monitor the initial extrusion pressure, improve the installation effect of the seal 310, and reduce the impact of installation conditions on the sealing condition of the accommodating space.

[0025] In other embodiments, the detection unit 311 may include a first position detector 3111, a second position detector 3112, and a pressure detector 3113. The detection unit 311 may also include any two different detectors. By combining multiple detectors to detect the actual sealing data of the accommodating space, the sealing condition of the accommodating space can be monitored more comprehensively and accurately, thereby improving the monitoring effect and accuracy.

[0026] In one embodiment, the seal 310 includes a first sealing layer and a second sealing layer adjacent to and connected to the first sealing layer. The first sealing layer is in contact with the inner surface of the second mounting portion 112, and the second sealing layer is in contact with the outer surface of the connector 22. Since the connector 22 continuously exerts force on the second sealing layer during the use of the seal 310, and the forces acting on the second sealing layer are complex and varied, using a different material for the first sealing layer than the second sealing layer can improve the adaptability of the seal 310 to complex operating conditions. Furthermore, the second sealing layer is made of a wear-resistant material, enabling the seal 310 to better adapt to complex friction conditions and improve the sealing effect on the accommodating space.

[0027] In one embodiment, the first side surface 3101 of the seal 310 that contacts the outer surface of the connector 22 is an arc surface. The arc surface is adapted to the outer surface of the connector 22, and there is a surface contact between the arc surface and the connector 22. Compared with the line contact between the conventional O-ring seal structure and the outer surface of the connector 22, the arc surface of the seal in this embodiment increases the contact area with the outer surface of the connector 22. This not only allows for better fit and compression of the outer surface of the connector 22, but also reduces the occurrence of twisting, effectively improving the sealing effect. In other embodiments, a rounded corner structure is provided between adjacent sides of the seal 310. The rounded corner structure transitions and connects the two adjacent sides, making the seal 310 form a smooth outer surface. This reduces the friction between the seal 310 and other components, reduces the wear of the seal 310, and improves the sealing effect.

[0028] In one embodiment, the output unit electrically connected to the detection unit 311 includes an alarm. The output unit emits different alert sounds through the alarm when outputting sealing conditions, better reminding the user to monitor the sealing condition of the containment space in real time and maintain it promptly, thereby improving the performance and service life of the semi-submerged propeller propulsion device 1 that monitors the sealing performance of the seals. Furthermore, the output unit includes at least one mobile terminal and at least one fixed terminal located in the control room. The fixed terminal is wirelessly connected to each mobile terminal, and each mobile terminal can synchronously output the sealing condition of the containment space. By setting multiple mobile terminals, it is more convenient for the user to understand and maintain the sealing condition of the containment space in a timely manner. This arrangement improves the flexibility of the output unit in outputting sealing conditions, thus better improving the performance and service life of the semi-submerged propeller propulsion device 1 that monitors the sealing performance of the seals.

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A semi-submerged propeller propulsion device capable of monitoring the sealing performance of seals, characterized in that, include: A drive assembly includes a fixed housing and an output shaft passing through the fixed housing. The fixed housing includes a first mounting portion connected to the stern plate and a second mounting portion disposed opposite to the first mounting portion. A receiving space is provided between the first mounting portion and the second mounting portion to accommodate the output shaft. A propulsion assembly is driven to the output shaft. The propulsion assembly includes a blade unit and a connector connected to the blade unit. One end of the blade unit is disposed within the receiving space and connected to the output shaft to form a power connection part. The connector is disposed within the second mounting part and movably connected to the second mounting part. A connecting component is disposed between the driving component and the propulsion component. The connecting component includes a sealing unit, which is disposed between the connecting member and the second mounting portion. The sealing unit includes a sealing member, a detection portion connected to the sealing member, and a storage portion, a judgment portion, and an output portion electrically connected to the detection portion. The sealing member is movably connected to the connecting member and installed in the second mounting portion to seal the connecting portion within the receiving space. The detection unit is used to detect the actual sealing data within the accommodating space, the storage unit is used to store initial data, the judgment unit is used to judge the sealing condition of the accommodating space based on the actual sealing data and the initial data, and the output unit is used to output the sealing condition data. The detection unit includes a second position detector disposed within the sealing element, the second mounting part includes an inner surface facing the sealing element, the sealing element includes a second side surface facing the second mounting part, the second position detector is used to detect a second actual distance between the second side surface and the inner surface, the actual sealing data is the second actual distance, the initial data is the second initial distance between the second side surface and the inner surface detected by the second position detector for the first time, and when the second actual distance exceeds the second initial distance by 0.5 mm, the judgment unit determines that the sealing element has failed to seal. The detection unit includes a first position detector disposed in the seal. The connector includes an outer surface facing the seal, and the seal includes a first side facing the connector. The first position detector is used to detect a first actual distance between the first side and the outer surface. The actual sealing data is the first actual distance, and the initial data is the first initial distance between the first side and the outer surface detected by the first position detector for the first time. When the first actual distance exceeds the first initial distance by 1 mm, the judgment unit determines that the seal has failed to seal. The connecting assembly further includes an adjusting ring for fixing the sealing unit. The adjusting ring is detachably connected to the second mounting part and abuts against the sealing element to fix the sealing element. The detection part includes a pressure detector, which is disposed between the sealing element and the adjusting ring for detecting the actual extrusion force between the adjusting ring and the sealing element. The actual sealing data is the actual extrusion force, and the initial data is a preset pressure threshold. When the actual extrusion force is less than the pressure threshold, the judgment part determines that the sealing element has failed to seal. The seal includes a first sealing layer for contacting the second mounting portion, and the seal also includes a second sealing layer connected to the first sealing layer for contacting the connector, wherein the material of the second sealing layer is different from the material of the first sealing layer. In the structure of the seal, the first side surface used to contact the outer surface of the connector is an arc surface, which is adapted to the outer surface of the connector, and the arc surface and the connector are in surface contact.

2. The semi-submerged propeller propulsion device for monitoring the sealing performance of seals as described in claim 1, characterized in that, The material of the second sealing layer is a wear-resistant material.

3. The semi-submerged propeller propulsion device for monitoring the sealing performance of the seals as described in claim 1, characterized in that, The seal has a rounded corner structure between two adjacent sides.

4. The semi-submerged propeller propulsion device for monitoring the sealing performance of a sealing element according to any one of claims 1-3, characterized in that, The output unit includes an alarm, which outputs a prompt sound based on the sealing condition data.

5. The semi-submerged propeller propulsion device for monitoring the sealing performance of the seals as described in claim 1, characterized in that, The output unit includes at least one mobile terminal, which is used to synchronously output the sealing condition data.

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