Sealing structure for pump jet propeller

Abstract

The utility model relates to the technical field of shipbuilding, in particular to a sealing structure for a pump-jet propeller, which comprises a semi-coated frame and a sealing cover, an inner cavity for accommodating the pump-jet propeller is arranged in the semi-coated frame, the sealing cover is mounted right above the semi-coated frame, the sealing cover is connected with the semi-coated frame through bolts, and the semi-coated frame is connected with the pump-jet propeller through bolts. The sealing gasket is arranged between the semi-wrapping frame and the sealing cover, liquid is prevented from permeating into the inner cavity to damage the pump jet propeller, the sealing cavity is designed to be in a semi-wrapping mode, only one face of the sealing cavity is open, the periphery of the semi-wrapping cavity is connected with a plurality of sets of stand columns, the rigidity of structural parts is greatly enhanced, and the sealing effect is good. The embedded part is made to be more stable under the complex working condition, external force impact and deformation are effectively resisted, a supporting structure matched with the embedded part is successfully constructed, convenient conditions are created for installation of parts, and meanwhile the key effect is achieved on improvement of the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, specifically to a sealing structure for a pump-jet propulsion system. Background Technology

[0002] In the field of modern marine propulsion technology, pump-jet propulsion systems are gradually becoming an important propulsion device for various types of ships, especially underwater vehicles such as submarines, which have extremely high requirements for quietness and propulsion performance, due to their significant advantages in improving propulsion efficiency and reducing noise. However, the efficient and stable operation of pump-jet propulsion systems places stringent requirements on the installation and protection of their internal components.

[0003] Some components of pump-jet propulsion systems require independent installation spaces with excellent sealing properties to prevent external liquid intrusion and damage such as corrosion and short circuits, which could affect the overall performance of the propulsion system. In existing domestic technologies and products, various sealing designs exist for pump-jet propulsion systems. One common design is a C-shaped sealing cap with open ends. In practical applications, one end of this cap is sealed to the main structure of the pump-jet propulsion system, while the other end needs to be sealed to an additional structural component, which in turn needs to be re-sealed to the pump-jet body. While this complex sealing method attempts to achieve a sealing function to some extent, the introduction of too many sealing reference surfaces makes each sealing connection a potential leakage risk point. As the number of sealing reference surfaces increases, the difficulty and complexity of sealing increase exponentially. Problems in any sealing link, such as aging of the sealing material or installation misalignment, can easily lead to liquid leakage, significantly increasing the probability of pump-jet propulsion system failure and consequently affecting the navigation safety and performance of the ship.

[0004] Therefore, there is an urgent need for a sealing structure for pump-jet propulsion. By optimizing the structural design and reducing the number of sealing reference surfaces, the risk of leakage can be significantly reduced, thereby improving the reliability and stability of pump-jet propulsion. Utility Model Content

[0005] To address the existing technical problems, this utility model aims to provide a sealing structure for pump-jet propulsion. The sealing cavity is designed as a semi-enclosed style, with only one side open. Several sets of columns are integrally set around the periphery of this semi-enclosed cavity, which greatly enhances the rigidity of the structural components, making them more stable under complex working conditions and effectively resisting external impacts and deformations. It successfully constructs a support structure that adapts to the inserts, creating convenient conditions for component installation, and at the same time plays a key role in improving the sealing effect, thus comprehensively improving the reliability and practicality of the pump-jet propulsion.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing structure for a pump-jet propulsion device includes:

[0008] Partially enclosed frame and sealing cap;

[0009] The semi-enclosed frame has an inner cavity for accommodating the pump-jet propulsion device. The sealing cover is installed directly above the semi-enclosed frame and is connected to the semi-enclosed frame by bolts. A sealing gasket is provided between the semi-enclosed frame and the sealing cover to prevent liquid from seeping into the inner cavity and causing damage to the pump-jet propulsion device.

[0010] As an improvement, the semi-enclosed frame includes a base plate and a support portion. The support portion is vertically fixedly installed on the base plate. The support portion is provided with several sets of grooves, which are recessed from the support portion toward the inner cavity.

[0011] As an improvement, a column is provided in the groove, the column is vertically installed on the base plate and is integrally formed with the support part, the column is hollow and the height of the column is the same as that of the support part.

[0012] As an improvement, the sealing cover is provided with several sets of connection holes corresponding to the column, and the sealing cover is connected to the column by bolts.

[0013] As an improvement, the sealing gasket is configured to conform to the upper top surface of the support, and the cross-section of the sealing gasket is L-shaped.

[0014] As an improvement, a limiting block is also provided on the side of the sealing cap that abuts against the sealing gasket. The limiting block abuts against the sealing gasket and is integrally formed with the sealing cap.

[0015] As an improvement, the limiting block is configured to mimic the shape of the support portion.

[0016] As an improvement, a motor and a driver are installed in the inner cavity, and the motor and driver are fixedly connected to the base plate through a mounting plate.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) In this utility model, the sealing cover and the semi-enclosed frame are tightly connected by bolts, and a sealing gasket is set between them to effectively prevent liquid from seeping into the inner cavity that contains the pump-jet propulsion device, providing reliable protection for the pump-jet propulsion device, greatly reducing the risk of damage caused by liquid intrusion, and significantly improving the operational stability and service life of the pump-jet propulsion device.

[0019] (2) The semi-enclosed frame consists of a base plate and a support part vertically installed on it. The support part is provided with a groove that is recessed into the inner cavity. The design of the groove reduces the weight of the support part and lowers the material cost. On the other hand, it optimizes the fluid dynamics performance, reduces the resistance of the fluid to the structure when the pump-jet propulsion is working, and improves the propulsion efficiency.

[0020] (3) In this utility model, a hollow column is set in the groove and is integrally formed with the support and vertically installed on the base plate. The column and the support are at the same height, making reasonable use of space and making the internal layout more compact and orderly. At the same time, the integral design enhances the integrity and stability of the structure. The sealing cover is provided with a connection hole corresponding to the column, and is connected to the column by bolts. This connection method makes the installation and disassembly of the sealing cover more convenient, and facilitates the maintenance, repair or replacement of parts of the pump-jet propulsion device in the later stage.

[0021] (4) In this utility model, the sealing gasket is similar to the top surface of the support and the cross-section of the sealing gasket is L-shaped, which can closely fit the contact area between the support and the sealing cover. When subjected to bolt tightening pressure, it can give full play to its elastic deformation ability, further improve the sealing effect, and also improve the installation accuracy and convenience of the sealing gasket.

[0022] In summary, this utility model has the advantages of strong sealing, high structural strength, stability and safety, and convenient operation, and is especially suitable for the field of shipbuilding technology. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the sealing structure of this utility model;

[0024] Figure 2 This is a partial structural diagram of the sealing structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal structure of the semi-enclosed frame of this utility model;

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0027] In the figure: semi-enclosed frame 1, inner cavity 10, base plate 11, support part 12, groove 13, column 14, motor 15, driver 16, mounting plate 17, sealing cover 2, connecting hole 21, limit block 22, sealing gasket 3. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Example 1:

[0032] like Figures 1-4 As shown, a sealing structure for a pump-jet propulsion system includes:

[0033] The semi-enclosed frame 1 and sealing cap 2;

[0034] The semi-enclosed frame 1 has an inner cavity 10 for accommodating the pump-jet propulsion unit. The sealing cover 2 is installed directly above the semi-enclosed frame 1 and is connected to the semi-enclosed frame 1 by bolts. A sealing gasket 3 is provided between the semi-enclosed frame 1 and the sealing cover 2 to prevent liquid from seeping into the inner cavity 10 and causing damage to the pump-jet propulsion unit. The sealing gasket 3 undergoes elastic deformation under bolt pressure. When the bolts are tightened, the sealing gasket 3 fills the tiny gap between the semi-enclosed frame 1 and the sealing cover 2, effectively preventing liquid from seeping into the inner cavity 10. Once liquid enters the inner cavity 10, it may corrode the components of the pump-jet propulsion unit, interfere with the electrical system, and ultimately cause the entire propulsion unit to malfunction.

[0035] Furthermore, the semi-enclosed frame 1 includes a base plate 11 and a support part 12. The support part 12 is vertically fixedly installed on the base plate 11. This vertical installation method ensures the effective transmission of force and can evenly distribute the vertical force generated by the pump-jet propulsion device during operation to the base plate. The support part 12 is provided with several sets of grooves 13. The grooves 13 are recessed from the support part 12 toward the inner cavity 10. The grooves 13 provide installation space for the column 14 without affecting the original mechanical properties and structural integrity of the support part 12.

[0036] Furthermore, a column 14 is provided in the groove 13. The column 14 is vertically installed on the base plate 11 and is integrally formed with the support part 12. This integral forming greatly enhances the connection strength between the two, eliminates the weak links that may exist in traditional splicing methods, and ensures that the connection will not loosen or break when subjected to complex external forces. The column 14 is hollow. The hollow structure significantly reduces the weight of the entire semi-enclosed frame 1 without significantly reducing the load-bearing capacity of the column, effectively saving material costs, and reducing the influence of inertial forces during operation. The column 14 and the support part 12 are at the same height. This height consistency design ensures that the entire support system provides uniform and stable support force on the same horizontal plane. When the pump-jet propulsion is running, it can make the force on the propulsion more balanced and avoid local stress concentration caused by the difference in support height. This improves the operational stability and reliability of the entire semi-enclosed frame 1 and the pump-jet propulsion, and provides a solid guarantee for the continuous and stable operation of the pump-jet propulsion under complex working conditions.

[0037] It should be further explained that the sealing cover 2 is provided with several sets of connection holes 21 corresponding to the column 14. The sealing cover 2 and the column 14 are connected by bolts. The sealing cover 2 works in conjunction with other parts of the semi-enclosed frame 1 to effectively prevent external fluids, impurities and other contaminants from entering the working area of ​​the pump-jet propulsion. At the same time, it provides a stable and well-sealed working environment for the pump-jet propulsion, which greatly improves the reliability and service life of the sealing structure of the entire pump-jet propulsion.

[0038] In addition, the sealing gasket 3 is set in a similar shape to the top surface of the support part 12, and the bottom surface of the sealing gasket 3 can be precisely fitted with the top surface of the support part 12. The fit between the two reaches an extremely high standard, minimizing the gaps that may be caused by surface mismatch, and reducing the risk of external fluids and impurities entering the working area of ​​the pump-jet propulsion unit through gaps from the root.

[0039] The sealing gasket 3 has an L-shaped cross-section. On the one hand, the vertical part of the L-shape can fit tightly against the side of the support 12, further enhancing the contact area and sealing performance between the sealing gasket and the support, effectively preventing fluid from seeping from the side. On the other hand, the horizontal part of the L-shape provides a reliable basis for good contact with the sealing cover 2, forming an all-round sealing barrier between the sealing cover 2 and the support 12. The sealing gasket 3 is made of a special flexible sealing material, which has high elasticity, wear resistance, corrosion resistance and good anti-aging properties. It can still maintain stable sealing performance under the long-term pressure, vibration and complex working environment generated by the pump-jet propulsion.

[0040] The upper and lower surfaces of the sealing gasket 3 abut against the support part 12 and the sealing cover 2, respectively. When the sealing cover 2 is fastened to the column 14 by bolts, the sealing cover 2 applies uniform pressure to the upper surface of the sealing gasket 3, causing the sealing gasket 3 to undergo a certain degree of elastic deformation. At this time, the sealing gasket 3, with its good elasticity, can tightly fill the tiny gap between the support part 12 and the sealing cover 2. Whether it is a micro gap caused by manufacturing error or a dynamic gap caused by structural stress deformation, the sealing gasket 3 can adapt in time and seal effectively. This tight abutment not only ensures the good sealing effect of the sealing structure under static conditions, but also maintains reliable sealing performance when facing dynamic conditions such as vibration and pressure fluctuations during the operation of the pump-jet propulsion, providing a solid sealing guarantee for the stable operation of the pump-jet propulsion and effectively improving the reliability and durability of the sealing structure of the entire pump-jet propulsion.

[0041] Furthermore, a limiting block 22 is provided on the side of the sealing cover 2 that abuts against the sealing gasket 3. The limiting block 22 is provided to further optimize the performance of the sealing structure and improve its reliability under complex working conditions. During the operation of the pump-jet propulsion device, strong vibrations and pressure fluctuations caused by fluid impact will occur. These dynamic forces may cause the sealing gasket 3 to shift or deform, thereby affecting the sealing effect. The presence of the limiting block 22 can accurately limit the sealing gasket 3, effectively preventing unnecessary displacement under the above-mentioned dynamic working conditions, ensuring that the sealing gasket 3 always remains in the optimal sealing position and continuously performs good sealing performance.

[0042] The limiting block 22 is set to abut against the sealing gasket 3. After the sealing cover 2 is tightened by bolts, the limiting block 22 can abut against the sealing gasket 3 just right, thus giving the sealing gasket 3 a certain constraint.

[0043] The limiting block 22 and the sealing cover 2 are integrally formed. The integral forming process eliminates the connection gaps that may exist in the traditional splicing method, which greatly enhances the connection strength between the limiting block 22 and the sealing cover 2. Under the action of various complex external forces generated during the operation of the pump-jet propulsion, the limiting block 22 and the sealing cover 2 can work together to stably perform the limiting function of the sealing gasket 3, and there will be no situation where the limiting fails due to loose connection.

[0044] Furthermore, the limiting block 22 is configured to conform to the shape of the support part 12. As the key load-bearing component of the semi-enclosed frame 1, the limiting block 22 conforms to the shape of the support part 12, so that after the sealing cover 2 and the semi-enclosed frame 1 are assembled, the limiting block 22 can form a tight and fitting correspondence with the support part 12.

[0045] In addition, a motor 15 and a driver 16 are installed in the inner cavity 10, and the motor 15 and the driver 16 are fixedly connected to the base plate 11 through a mounting plate 17.

[0046] It should be noted that after all equipment installation on the semi-enclosed frame 1 is completed, the sealing process begins. First, a specially formulated sealant is applied to the inner edge of the opening surface of the semi-enclosed frame 1. After applying the sealant, the sealing gasket 3 is placed on the inner edge of the sealant-applied opening surface of the semi-enclosed frame 1. Subsequently, sealant is applied to the limiting block 22 in the same manner. After application, the sealing cover 2 is slowly and evenly pressed into the semi-enclosed frame 1 along the position of the sealing gasket 3. During the pressing process, attention is paid to the alignment of the sealing cover 2 and the semi-enclosed frame 1 to ensure accurate positioning and prevent seal failure due to misalignment. Finally, the screws are tightened to ensure a tight fit between the sealing cover 2, the sealing gasket 3, and the semi-enclosed frame 1, forming a reliable sealing structure that effectively prevents external fluids and impurities from entering the internal working area of ​​the equipment, ensuring stable equipment operation and extending its service life.

[0047] Example 2:

[0048] The difference between the sealing structure of the pump-jet propulsion device in this embodiment and that in embodiment 1 is:

[0049] The column 14 in this embodiment can also be designed inside the inner cavity 10. The column 14 located inside can more directly and evenly distribute the various loads generated during the operation of the pump-jet propulsion, such as the vibration caused by the operation of the propulsion and the pressure fluctuations caused by fluid impact.

[0050] In addition, it makes the exterior of the semi-enclosed frame 1 more concise and streamlined, with no protruding column structure on the outside. This not only reduces fluid resistance and improves the hydrodynamic performance of the pump-jet propulsion unit during operation, but also makes the entire device more compact and reasonable in terms of spatial layout.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seal structure for a pump-jet propeller, characterized by, The utility model relates to a kind of sealing structures for pump-jet propeller, including: Half-enclosed frame (1) and sealing cover (2); The inner cavity (10) for accommodating pump-jet propeller is provided in the half-enclosed frame (1), the sealing cover (2) is installed on the top of the half-enclosed frame (1), the sealing cover (2) is connected with the half-enclosed frame (1) by bolt, the sealing gasket (3) is provided between the half-enclosed frame (1) and the sealing cover (2), to prevent liquid from seeping into the inner cavity (10) and causing pump-jet propeller damage.

2. The sealing structure for pump-jet propeller according to claim 1, wherein: The half-enclosed frame (1) includes a bottom plate (11) and a support portion (12), the support portion (12) is vertically fixedly installed on the bottom plate (11), the support portion (12) is provided with a plurality of groups of grooves (13), and the grooves (13) are recessed from the support portion (12) to one side of the inner cavity (10).

3. The sealing structure for pump-jet propeller according to claim 2, wherein: A stand (14) is arranged in the groove (13), the stand (14) is vertically installed on the bottom plate (11) and integrally formed with the support portion (12), the stand (14) is hollow, and the height of the stand (14) is consistent with that of the support portion (12).

4. The sealing structure for pump-jet propeller according to claim 3, wherein: A plurality of connecting holes (21) corresponding to the stand (14) are arranged on the sealing cover (2), and the sealing cover (2) is connected with the stand (14) by bolts.

5. The sealing structure for pump-jet propeller according to claim 2, wherein: The sealing gasket (3) is shaped with the upper top surface of the support portion (12), and the cross section of the sealing gasket (3) is L-shaped.

6. The sealing structure for pump-jet propeller according to claim 2, wherein: A limiting block (22) is further arranged on the side of the sealing cover (2) abutting against the sealing gasket (3), the limiting block (22) is arranged abutting against the sealing gasket (3), and the limiting block (22) is integrally formed with the sealing cover (2).

7. The sealing structure for pump-jet propeller according to claim 6, wherein: The limiting block (22) is shaped with the support portion (12).

8. The sealing structure for pump-jet propeller according to claim 2, wherein: A motor (15) and a driver (16) are installed in the inner cavity (10), and the motor (15) and the driver (16) are fixedly connected with the bottom plate (11) by an installation plate (17).

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