Mounting structure of nozzle of pump-jet propeller

Abstract

The utility model relates to the technical field of production of pump-jet propellers, in particular to a mounting structure of a nozzle of a pump-jet propeller, which comprises a nozzle, a main frame and a plurality of groups of connecting rods, the nozzle is sleeved at one end of the main frame and is connected with the main frame through the connecting rods, and mounting grooves corresponding to the connecting rods are arranged on the outer side wall of the main frame. A mounting groove is formed in the main frame, a connecting rod is mounted in the mounting groove, two ends of the connecting rod are respectively connected with the main frame and the nozzle through bolts, a sealing gasket is arranged between the main frame and the nozzle, and the connecting rod is matched with the sealing gasket to realize the sealing connection between the nozzle and the main frame. And a limiting block and a limiting groove are matched to limit circumferential rotation of the nozzle, so that the mounting stability and sealing performance of the nozzle are effectively improved, the reliability and high efficiency of the pump-jet propeller during operation are guaranteed, and the problems that a traditional mounting structure is prone to loosening, poor in sealing effect and the like are solved.

Description

Technical Field

[0001] This utility model relates to the field of pump-jet propulsion technology, specifically to an installation structure for the nozzle of a pump-jet propulsion device. Background Technology

[0002] In the field of underwater vehicles and related equipment, pump-jet propulsion has become an important power plant due to its high efficiency and low noise characteristics. As a key component of pump-jet propulsion, the structural design and installation method of the nozzle directly affect the overall performance of the propulsion system. Typically, the water outlet end of the nozzle is designed to taper at a certain proportion to optimize the water flow pattern and improve propulsion efficiency and noise reduction.

[0003] Currently, there are significant deficiencies in the nozzle installation technology of small pump-jet propulsion units in China. Among the main existing installation methods, one is direct adhesive bonding. While this method is simple to operate, it poses a significant safety hazard. In practical applications, the nozzle is highly susceptible to detachment from the propulsion unit upon impact, leading to equipment failure. Furthermore, with prolonged use, the adhesive layer gradually ages, drastically reducing sealing and connection performance, severely impacting the normal operation and service life of the pump-jet propulsion unit. The second method is a rotary locking installation. This structure has extremely limited applicability, only suitable for very small pump-jet propulsion units or duct-type propulsion units. Simultaneously, its structural strength is insufficient, making it easily damaged upon impact and failing to provide stable and reliable nozzle installation.

[0004] In summary, the existing nozzle mounting structure of small pump-jet propulsion units is insufficient to meet actual usage requirements. There is an urgent need for a new mounting structure to solve the problems of unstable nozzle mounting, poor applicability, and easy damage in the existing technology, and to improve the reliability and stability of pump-jet propulsion units. Utility Model Content

[0005] To address the existing technical problems, this utility model aims to provide an installation structure for the nozzle of a pump-jet propulsion device. The nozzle is connected to the propulsion device via a connecting rod that engages with a mounting groove on the outer wall of the propulsion device. A sealing gasket enhances the sealing performance, and the cooperation between a limiting block and a limiting groove not only achieves precise positioning but also prevents circumferential rotation of the nozzle. Furthermore, the groove structure on the sealing gasket further improves the sealing and positioning effects. This effectively solves the problems of insecure nozzle installation, poor applicability, and susceptibility to damage in existing technologies, thereby improving the reliability and stability of the pump-jet propulsion device.

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

[0007] An installation structure for the nozzle of a pump-jet propulsion device, comprising:

[0008] Nozzle, main frame, and several sets of connecting rods;

[0009] The nozzle is sleeved on one end of the main frame. The nozzle is connected to the main frame through the connecting rod. The outer wall of the main frame is provided with a mounting groove corresponding to the connecting rod. The connecting rod is installed in the mounting groove. The two ends of the connecting rod are connected to the main frame and the nozzle respectively by bolts. A sealing gasket is provided between the main frame and the nozzle. The connecting rod and the sealing gasket cooperate to achieve a sealed connection between the nozzle and the main frame.

[0010] As an improvement, the nozzle is funnel-shaped, and several sets of connecting blocks corresponding to the connecting rod are provided on the outer wall of the nozzle. The connecting blocks are concave and integrally formed with the nozzle.

[0011] As an improvement, the main frame includes a connecting part and a sleeve part, the mounting groove is disposed on the connecting part and is evenly distributed along the circumferential direction of the connecting part, the connecting part is fixedly connected to the sleeve part, and the nozzle is sleeved on the sleeve part.

[0012] As an improvement, a ramp is provided on the inner wall of the nozzle. The ramp is arranged in a ring shape and is integrally formed with the nozzle. An inclined surface is provided on the sleeve corresponding to the ramp. The ramp and the inclined surface cooperate to restrict the axial displacement of the sleeve within the nozzle.

[0013] As an improvement, the sealing gasket is arranged in a ring shape and is disposed between the inclined platform and the sleeve portion. One side of the sealing gasket abuts against the inclined platform, and the other side of the sealing gasket abuts against one end of the sleeve portion.

[0014] As an improvement, a limiting block is provided on the inner wall of the nozzle, and a limiting groove is provided on the sleeve corresponding to the limiting block. The limiting block and the limiting groove cooperate to restrict the circumferential rotation of the nozzle.

[0015] As an improvement, the sealing gasket is provided with a groove corresponding to the limiting block.

[0016] As an improvement, one end of the connecting rod abuts against the connecting block, and the other end of the connecting rod abuts against the connecting part. Both ends of the connecting rod are provided with connecting holes, and the connecting rod is connected to the bolt through the connecting holes.

[0017] As an improvement, both the connecting block and the connecting part are provided with mounting holes, the mounting holes are provided corresponding to the connecting holes, and the bolts are inserted through the mounting holes.

[0018] The beneficial effects of this utility model are as follows:

[0019] (1) This utility model adopts a connection method of connecting rod and bolt. The two ends of the connecting rod are connected to the main frame and the nozzle respectively by bolts, so that the nozzle and the main frame are tightly connected. Compared with the traditional adhesive bonding, this connection method can withstand greater external impact and is not easy to fall off even if it is hit. This greatly enhances the firmness of the connection and solves the problem that adhesive bonding is easy to fall off due to impact.

[0020] (2) In this utility model, a sealing gasket is provided between the sleeve part and the nozzle. When the main frame is connected to the nozzle by the connecting rod, the fastening action of the connecting rod will generate compressive stress on the sealing gasket, causing the sealing gasket to undergo elastic deformation, so that it can fit tightly against the surface of the sleeve part and the nozzle, effectively filling the tiny gap between the two caused by manufacturing tolerance, preventing water from leaking from the connection gap, thereby avoiding the decline in propeller performance due to water leakage, and improving the stability and efficiency of propeller operation.

[0021] (3) In this utility model, the annular inclined platform on the inner wall of the nozzle and the inclined surface of the main frame sleeve can effectively limit the axial distance between the nozzle and the main frame, ensure that the two maintain the correct relative position during installation and use, avoid axial movement, and ensure the normal operation of the thruster.

[0022] (4) In this utility model, the limiting block on the inner wall of the nozzle cooperates with the limiting groove on the main frame to effectively constrain the circumferential rotational freedom of the nozzle, effectively resist the torque generated during the operation of the propeller and the disturbance force brought by the external environment, avoid unnecessary circumferential rotation or rotation of the nozzle, ensure that the nozzle always maintains a stable installation posture during operation, thereby ensuring the accuracy of the propeller water jet direction and significantly improving the working efficiency and operational reliability of the propeller.

[0023] (5) The installation structure of this utility model is applicable to pump-jet propulsion devices of different sizes, overcoming the limitation that the rotating clamping structure is only applicable to small-scale or duct-type propulsion devices, and has a wider range of applicability. At the same time, its structure is relatively simple, easy to install and maintain, and reduces production costs and maintenance difficulty.

[0024] In summary, this utility model has the advantages of a stable and reliable connection structure, strong sealing performance, accurate positioning, and strong applicability and convenience, and is especially suitable for the field of pump-jet propulsion technology. Attached Figure Description

[0025] Figure 1 This is an exploded structural diagram of the nozzle mounting structure of the pump-jet propulsion device of this utility model;

[0026] Figure 2 This is a three-dimensional structural diagram of the nozzle of this utility model;

[0027] Figure 3This is a schematic diagram of the three-dimensional structure of the main frame of this utility model;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the connecting rod of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the sealing gasket of this utility model.

[0030] In the figure: Nozzle 1, connecting block 10, mounting hole 101, limiting block 11, inclined platform 12, main frame 2, mounting groove 20, connecting part 21, sleeve part 22, inclined surface 23, limiting groove 24, connecting rod 3, bolt 31, connecting hole 32, sealing gasket 4, groove 41. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Example 1:

[0035] like Figures 1-5 As shown, a mounting structure for a pump-jet propulsion nozzle includes:

[0036] Nozzle 1, main frame 2 and several sets of connecting rods 3;

[0037] The nozzle 1 is sleeved on one end of the main frame 2. The nozzle 1 is connected to the main frame 2 through the connecting rod 3. The outer wall of the main frame 2 is provided with a mounting groove 20 corresponding to the connecting rod 3. The connecting rod 3 is installed in the mounting groove 20. The mounting groove 20 is set in the same shape as the side wall of the connecting rod 3 to ensure that the connecting rod 3 can be accurately installed therein, thereby ensuring the stability of the connection between the nozzle 1 and the main frame 2. The two ends of the connecting rod 3 are connected to the main frame 2 and the nozzle 1 respectively by bolts 31. The bolt connection method facilitates installation and disassembly. In actual operation, the reliability and sealing of the connection can be ensured by controlling the tightening torque of the bolts.

[0038] A sealing gasket 4 is provided between the main frame 2 and the nozzle 1. The sealing gasket 4 is usually made of rubber material with good elasticity and water resistance, which can effectively fill the small gap between the main frame 2 and the nozzle 1. The connecting rod 3 cooperates with the sealing gasket 4 to achieve a sealed connection between the nozzle 1 and the main frame 2. During the tightening process of the connecting rod 3, the sealing gasket 4 is squeezed and undergoes elastic deformation, which further enhances the sealing effect, prevents water from leaking from the connection, and ensures the normal and efficient operation of the pump-jet propulsion device.

[0039] The nozzle 1 is funnel-shaped, and its gradually narrowing shape can effectively guide the water flow to accelerate, reduce turbulence and resistance at the nozzle, and thus significantly improve the propulsion efficiency of the pump-jet propulsion device. Several sets of connecting blocks 10 corresponding to the connecting rod 3 are provided on the outer wall of the nozzle 1. The connecting blocks 10 are concave and the recesses of the connecting blocks 10 are used to install bolts 31, so as to avoid the bolt heads protruding and affecting the overall structure. The concave design can effectively hide the bolt heads and avoid interference with external components. During the operation of the pump-jet propulsion device, the concave structure can also play a certain protective role, reduce the impact of water flow, collision and other external forces on the bolts 3, improve the long-term stability and reliability of the connection, and further ensure the stability of the connection between the nozzle and the main frame.

[0040] The connecting block 10 and the nozzle 1 are integrally formed. The integral forming avoids the connection gaps and weak points that may be generated by traditional welding or assembly methods. It not only ensures the integrity and stability of the structure, but also improves production efficiency and reduces processing costs. Moreover, the integral forming process ensures good mechanical transmission performance between the connecting block 10 and the nozzle 1, so that the nozzle 1 can stably withstand the tension and pressure from the connecting rod 3 during operation, ensuring the reliable operation of the pump-jet propulsion device.

[0041] Furthermore, the main frame 2 includes a connecting part 21 and a sleeve part 22. The mounting groove 20 is disposed on the connecting part 21 and is evenly distributed along the circumference of the connecting part 21. This ensures that after the connecting rod 3 is installed, the force between the nozzle 1 and the main frame 2 is uniform, avoiding structural damage due to local stress concentration. The connecting part 21 and the sleeve part 22 are fixedly connected to ensure the overall strength and stability of the main frame 2. The nozzle 1 is sleeved on the sleeve part 22, and the sleeve part 22 undertakes the docking function with the nozzle 1. Its outer diameter is adapted to the inner diameter of the nozzle 1.

[0042] Furthermore, a ramp 12 is provided on the inner wall of the nozzle 1. The ramp 12 is arranged in a ring shape and is integrally formed with the nozzle 1, ensuring structural strength and dimensional accuracy and avoiding assembly errors caused by separate processing. The sleeve part 22 is provided with an inclined surface 23 corresponding to the ramp 12. Its inclination direction and angle match the ramp 12. The ramp 12 and the inclined surface 23 cooperate to restrict the axial displacement of the sleeve part 22 in the nozzle 1, preventing the nozzle 1 from axially moving during the operation of the propeller, ensuring the stability of the relative position of the nozzle 1 and the main frame 2, and also providing a reliable axial positioning reference for the sealing gasket 4, further improving the sealing effect and ensuring the reliability and stability of the pump-jet propeller during operation.

[0043] It should be noted that a limiting block 11 is provided on the inner wall of the nozzle 1. The limiting block 11 is integrally formed with the nozzle 1 to ensure its structural strength and installation accuracy. A limiting groove 24 is provided on the sleeve part 22 corresponding to the limiting block 11. The limiting block 11 and the limiting groove 24 cooperate to restrict the circumferential rotation of the nozzle 1. When the pump-jet propulsion device is running, the complex force generated by the high-speed water flow can easily cause the nozzle 1 to rotate circumferentially. The mechanical constraint formed by the limiting block 11 and the limiting groove 24 can accurately restrict the circumferential rotation of the nozzle 1, ensure the stability of the water jet direction, and improve the propulsion efficiency.

[0044] In addition, the sealing gasket 4 is arranged in a ring shape and is disposed between the inclined platform 12 and the sleeve portion 22. One side of the sealing gasket 4 is in contact with the inclined platform 12. When the pump-jet propulsion device is working, internal pressure and vibration will be generated. The inclined platform 12 can provide stable support for the sealing gasket 4 and prevent the sealing gasket 4 from shifting or deforming under pressure. At the same time, the design of the inclined platform 12 allows the sealing gasket 4 to evenly distribute the force when subjected to pressure, further enhancing the reliability of the seal.

[0045] The other side of the sealing gasket 4 is set to abut against one end of the sleeve part 22, and the two can fit tightly together. The inclined surface 23 helps to increase the contact area between the sleeve part 22 and the sealing gasket 4, thereby improving the sealing effect.

[0046] This structure, which places the sealing gasket 4 between the inclined platform 12 and the sleeve 22, not only utilizes the special geometry of the inclined surface 23 to optimize the sealing performance, but also compensates for errors during the installation process to a certain extent, ensuring that the sealing gasket 4 is always in good working condition. Through the combined action of the sleeve 22 and the inclined platform 12 on the sealing gasket 4, the sealing performance of the pump-jet main frame nozzle installation structure is effectively improved, ensuring the stable operation of the pump-jet propulsion unit.

[0047] The sealing gasket 4 is provided with a groove 41 corresponding to the limiting block 11. The presence of the groove 41 provides a precise positioning reference for the installation of the sealing gasket 4. When the sealing gasket 4 is placed between the inclined platform 12 and the sleeve part 22, the position of the sealing gasket 4 can be quickly and accurately determined by simply aligning the limiting block 11 with the groove 41 and embedding it, which greatly improves the assembly efficiency and also reduces the risk of sealing failure caused by installation position deviation.

[0048] It should be noted that one end of the connecting rod 3 abuts against the connecting block 10, and the other end of the connecting rod 3 abuts against the connecting part 21. Both ends of the connecting rod 3 are provided with connecting holes 32. The connecting rod 3 is connected to the bolt 31 through the connecting holes 32. During the assembly process, the connecting block 10 and the connecting part 21 are connected to the connecting rod 3 through the bolt 31, so that the connecting rod 3 generates a preload in the axial direction. This ensures the rigid connection between the nozzle 1 and the main frame 2, and also allows the sealing gasket 4 to fully exert its sealing function under compression, effectively resisting the water flow impact and vibration generated during the operation of the pump-jet propulsion device, and ensuring the stable operation of the equipment.

[0049] Furthermore, both the connecting block 10 and the connecting part 21 are provided with mounting holes 101, which are correspondingly provided with the connecting holes 32. The bolts 31 are inserted through the mounting holes 101 to ensure that the bolts 31 are precisely matched with the connecting holes 32 at both ends of the connecting rod 3, so that a stable and sealed connection structure is formed between the nozzle 1, the connecting rod 3 and the main frame 2.

[0050] Example 2:

[0051] The difference between the installation structure of the pump-jet propulsion device in this embodiment and that in embodiment 1 is:

[0052] The connecting part 21 is slidably connected to the sleeve part 22, the connecting part 21 is sleeved on the sleeve part 22, and the connecting part 21 is horizontally movable along the length direction of the sleeve part 22.

[0053] It should be noted that the difference between this application and Embodiment 1 is that the position of the connecting part 21 on the sleeve part 22 can be adjusted according to actual needs. For example, the length of the connecting rod 3 may vary due to different design requirements, usage scenarios, or adaptation requirements with other components, which greatly improves the flexibility and applicability of the pump-jet propulsion installation structure.

[0054] Assembly process: Place the connecting rod 3 in the pre-set mounting slot 20, and use bolts 31 to initially tighten one end of the connecting rod 3 to the connecting part 21. Place the sealing gasket 4 in the nozzle 1. The sealing gasket 4 has a groove 41 corresponding to the limiting block 11. When placing the sealing gasket 4, pay attention to aligning the groove 41 with the limiting block 11 to ensure that the installation position of the sealing gasket 4 is accurate. Put the nozzle 1 on the sleeve part 22 of the main frame 2. During this process, the limiting block 11 on the inner wall of the nozzle 1 should engage with the corresponding limiting groove 24 on the main frame 2 to ensure that the relative position of the nozzle 1 and the main frame 2 is accurate.

[0055] At the same time, when the nozzle 1 is fitted into the main frame 2, the mounting hole 101 on the connecting block 10 should be aligned with the connecting hole 32 at the end of the connecting rod 3. The connecting block 10 and the connecting rod 3 are connected by bolts 31 so that the nozzle 1, the connecting rod 3 and the main frame 2 are firmly connected together.

[0056] 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 mounting structure of a pump-jet propeller nozzle, characterized by, The installation structure of the pump jet propeller nozzle comprises a nozzle (1), a main frame (2) and a plurality of connecting rods (3). The nozzle (1) is sleeved on one end of the main frame (2), the nozzle (1) is connected with the main frame (2) through the connecting rod (3), an installation groove (20) corresponding to the connecting rod (3) is arranged on the outer wall of the main frame (2), the connecting rod (3) is installed in the installation groove (20), the two ends of the connecting rod (3) are connected with the main frame (2) and the nozzle (1) respectively through bolts (31), a sealing gasket (4) is arranged between the main frame (2) and the nozzle (1), and the connecting rod (3) cooperates with the sealing gasket (4) to realize the sealed connection between the nozzle (1) and the main frame (2).

2. The installation structure of the pump jet propeller nozzle according to claim 1, wherein the nozzle (1) is in the form of a funnel, and a plurality of connecting blocks (10) corresponding to the connecting rods (3) are arranged on the outer wall of the nozzle (1), the connecting blocks (10) are in the form of concaves, and the connecting blocks (10) are integrally formed with the nozzle (1).

3. The installation structure of the pump jet propeller nozzle according to claim 2, wherein the main frame (2) comprises a connecting portion (21) and a sleeving portion (22), the installation grooves (20) are arranged on the connecting portion (21) and are uniformly distributed along the circumferential direction of the connecting portion (21), the connecting portion (21) is fixedly connected with the sleeving portion (22), and the nozzle (1) is sleeved on the sleeving portion (22).

4. The installation structure of the pump jet propeller nozzle according to claim 3, wherein an inclined table (12) is arranged on the inner wall of the nozzle (1), the inclined table (12) is in the form of a ring, the inclined table (12) is integrally formed with the nozzle (1), an inclined surface (23) corresponding to the inclined table (12) is arranged on the sleeving portion (22), and the inclined table (12) cooperates with the inclined surface (23) to limit the axial displacement of the sleeving portion (22) in the nozzle (1).

5. The installation structure of the pump jet propeller nozzle according to claim 4, wherein the sealing gasket (4) is in the form of a ring, the sealing gasket (4) is arranged between the inclined table (12) and the sleeving portion (22), one side of the sealing gasket (4) is arranged in abutment with the inclined table (12), and the other side of the sealing gasket (4) is arranged in abutment with one end of the sleeving portion (22).

6. The installation structure of the pump jet propeller nozzle according to claim 3, wherein a limiting block (11) is arranged on the inner wall of the nozzle (1), a limiting groove (24) corresponding to the limiting block (11) is arranged on the sleeving portion (22), and the limiting block (11) cooperates with the limiting groove (24) to limit the circumferential rotation of the nozzle (1).

7. The installation structure of the pump jet propeller nozzle according to claim 6, wherein ​ ​ ​ ​ ​ ​ The sealing gasket (4) is provided with a groove (41) corresponding to the limiting block (11).

8. The mounting structure of a pump-jet propeller nozzle according to claim 3, characterized in that: One end of the connecting rod (3) is in abutment with the connecting block (10), and the other end of the connecting rod (3) is in abutment with the connecting part (21), both ends of the connecting rod (3) are provided with connecting holes (32), and the connecting rod (3) is connected with the bolt (31) through the connecting holes (32).

9. The mounting structure of a pump-jet propeller nozzle according to claim 8, characterized in that: The connecting block (10) and the connecting part (21) are both provided with mounting holes (101), the mounting holes (101) are provided corresponding to the connecting holes (32), and the bolt (31) is arranged in the mounting holes (101).

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