Ship wake flow infrared and wake characteristic test model

Abstract

The utility model discloses a ship wake flow infrared and wake characteristic test model, which belongs to the technical field of ship wake flow test, and comprises a head section model block, a middle section model block and a tail section model block, a simulation module is arranged in the middle section model block, the middle section model block is formed by sequentially connecting and splicing a plurality of shells, a truss is arranged in each shell, and the tail section model block is arranged in the middle section model block. The adjacent trusses are movably connected through first connecting pieces, the adjacent shells are movably connected through second connecting pieces, mounting grooves are formed in the inner walls of the shells, mounting protrusions are arranged on the outer walls of the trusses, the mounting protrusions are matched with the mounting grooves, the mounting protrusions are of spiral structures wound on the outer walls of the trusses, and the mounting grooves are spiral grooves. And the mounting bulge is spirally mounted in the mounting groove. According to the utility model, the whole middle-section model block is arranged to be mounted and dismounted in a segmented manner, so that when the simulation module distributed in the middle-section model block locally breaks down, a specified area can be conveniently overhauled and maintained.

Description

Technical Field

[0001] This utility model relates to the field of ship wake testing technology, and in particular to a test model for the infrared and wake characteristics of ship wake. Background Technology

[0002] The infrared and wake characteristics of a ship's wake encompass all disturbances to the surrounding environment caused by the ship's navigation. Testing the infrared and wake characteristics of a ship's wake is one of the key technical means to understand the characteristics of a ship's wake. During the testing process, to ensure that the test results can guide the design of the actual vessel, the implementation of model navigation conditions and related functions such as heat emission is an important way to ensure the quality of the test. Therefore, optimizing the design of the test model is essential to continuously improve the effectiveness of ship wake infrared and wake characteristic tests.

[0003] To ensure ease of use, most test models adopt a split design, which also facilitates timely disassembly and repair in case of local failures. However, to ensure the stability of the entire model structure, trusses are usually installed inside the shell to enhance the shell's compressive strength. Traditional test models typically use a sliding rail connection to allow the trusses to be easily pulled out of the shell. The sliding rails are mostly straight, which facilitates easy pulling. However, since test models need to be tested underwater, changes in water flow can cause the model to sway left and right due to impacts. The rotational shear force generated by the swaying can cause the straight rails to deform, thus affecting the pulling function and easily damaging the entire test model, which is not conducive to the use of existing test scenarios. Utility Model Content

[0004] The purpose of this invention is to solve the problem that traditional test models, although designed in a split manner, are prone to damage at the assembly and disassembly points. This invention provides a test model for the infrared and wake characteristics of ship wakes, which has the advantages of using a spiral structure to assemble the shell and truss, resulting in good resistance to rotational shear forces and greater durability and reliability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A test model for the infrared and wake characteristics of a ship's wake includes a bow model block, a mid-section model block, and a stern model block. A simulation module is installed within the mid-section model block. The mid-section model block is composed of multiple shells connected sequentially. A truss is installed inside each shell. Adjacent trusses are movably connected via a first connector, and adjacent shells are movably connected via a second connector. The inner wall of each shell has a mounting groove, and the outer wall of each truss has a mounting protrusion. The mounting protrusion matches the mounting groove. The mounting protrusion is a spiral structure wound around the outer wall of the truss, and the mounting groove is a spiral groove. The mounting protrusion is spirally installed within the mounting groove.

[0007] Preferably, the truss includes an outer frame consisting of at least four longitudinal beams, which are connected by connecting beams, and each connection between the connecting beams and the longitudinal beams is provided with an installation protrusion.

[0008] Preferably, the first connector includes a plug and a slot, the plug is disposed at the end of one of the trusses, and the slot is disposed at the end of the adjacent truss. The plug is fixed by a locking mechanism after being inserted into the slot.

[0009] Preferably, the locking mechanism includes a locking block disposed on the insert block and a locking slot disposed in the slot. The outer wall of the insert block has a storage groove. The locking block is mounted on the inner wall of the storage groove via a torsion spring shaft. The torsion spring shaft is used to provide the elastic force for the locking block to pop out of the storage groove. A push block is also installed on the top of the locking slot. The push block is used to pass through the locking slot and press the locking block into the storage groove.

[0010] Preferably, the truss surface with the slot has a groove, the groove is connected to the slot, and the top of the push block is mounted inside the groove by a spring.

[0011] Preferably, the second connector includes a connecting ring disposed at one end of one of the housings and a connecting groove disposed on the adjacent housing. The connecting ring and the connecting groove are movably connected. A rubber sleeve is fitted onto the outer wall of the connecting ring to fill the gap between the connecting ring and the connecting groove.

[0012] Preferably, the outer diameter of the rubber sleeve at one end near the connecting groove is smaller than the outer diameter at the other end.

[0013] Preferably, the simulation module includes a heat emission module, a speed control module, and an attitude control module. Each module is independently installed on the truss and electrically connected to each other via cables.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By designing the entire middle section model block into segmented installation and disassembly, it is convenient to inspect and maintain the designated area when a local failure occurs in the simulation module distributed within the middle section model block. Each shell that makes up the middle section model block is equipped with a truss, which facilitates the fixation of the simulation module and increases the stability of the shell. The shell and the truss are assembled by a spiral, which not only facilitates assembly and disassembly, but also makes the connection between the mounting protrusion and the mounting groove tighter. In particular, the model will swing during the simulation test. Since the swing in any direction is in the same direction as the rotation of the spiral structure, the rotational shear force between the mounting protrusion and the mounting groove is not likely to affect the structure itself. Therefore, it is not easy to deform, and it is more stable and more durable.

[0016] 2. In this utility model, the shells are connected by a second connector, and the rubber sleeve of the second connector can not only fix the connection between the two shells, but also effectively seal the gap between the second connectors, thus ensuring the sealing effect of the entire model. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the experimental model of this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of the assembly between the truss and the shell of this utility model.

[0019] Figure 3 This is a schematic diagram of the connection structure between trusses in this utility model.

[0020] Figure 4 This is a structural schematic diagram of the adjacent first connecting member of this utility model.

[0021] Figure 5 This is a schematic diagram of the connection structure between adjacent shells of this utility model.

[0022] In the diagram: 1. First section, 2. Middle section, 3. Tail section, 4. Truss, 5. Shell, 6. First connector, 7. Second connector, 8. Simulation module, 9. Connecting beam, 10. Longitudinal beam, 11. Mounting protrusion, 12. Mounting groove, 13. Insert block, 14. Storage groove, 15. Locking block, 16. Torsion spring shaft, 17. Slot, 18. Locking groove, 19. Groove, 20. Push block, 21. Spring, 22. Connecting ring, 23. Rubber sleeve, 24. Connecting groove. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown, a test model for the infrared and wake characteristics of a ship's wake is disclosed, including a front model block 1, a mid-section model block 2, and a rear model block 3. A simulation module 8 is installed inside the mid-section model block 2. The mid-section model block 2 is composed of multiple shells 5 connected and spliced ​​in sequence. A truss 4 is installed inside each shell 5. Adjacent trusses 4 are movably connected by a first connector 6, and adjacent shells 5 are movably connected by a second connector 7. The inner wall of the shell 5 is provided with a mounting groove 12, and the outer wall of the truss 4 is provided with a mounting protrusion 11. The mounting protrusion 11 matches the mounting groove 12. The mounting protrusion 11 is a spiral structure wrapped around the outer wall of the truss 4, and the mounting groove 12 is a spiral groove. The mounting protrusion 11 is spirally installed in the mounting groove 12.

[0025] The entire test model adopts a split installation method. The simulation module 8 is installed in the middle section model block 2, providing the basic functions of the test model. The connection between the first section model block 1 and the tail section model block 3 and the middle section model block 2 can be achieved through pre-set installation ports or by riveting. The first section model block 1 is mainly used to reduce the resistance of the test model when moving in water, while the tail section model block 3 is equipped with a thruster to provide forward propulsion. Since the simulation module 8 is installed in the middle section model block 2, the middle section model block 2 is composed of multiple segments. This is conducive to the even distribution of the various components of the simulation module 8 in each segment, and it is convenient to disassemble the corresponding segment for repair in time if a component fails. In order to enhance the stability of the middle section model block 2, a truss 4 is installed in the shell 5, and multiple installation positions are set on the truss 4 to facilitate the installation of the simulation module 8. Adjacent trusses 4 are connected by a first connector 6, and adjacent shells 5 are connected by a second connector 7, thus forming a whole middle section model block 2. Since the simulation module 8 is installed inside the truss 4, and the truss 4 is installed inside the housing 5, the truss 4 and the housing 5 are designed to be movably connected in order to facilitate the disassembly and assembly of the simulation module 8, so that the truss 4 and the housing 5 can be easily separated for maintenance operations.

[0026] like Figure 2 and Figure 3 As shown, the truss 4 and the shell 5 are connected by a movable assembly method using mounting protrusions 11 and mounting slots 12. Unlike traditional assembly, the mounting protrusions 11 are spiral structures, with the spiral direction along the length of the truss 4. The corresponding mounting slots 12 also adopt a spiral structure. This installation process is a spiral assembly between the shell 5 and the truss 4. Using this method instead of the traditional straight rail installation facilitates the relative displacement between the shell 5 and the truss 4, ensuring that the simulation module 8 can be exposed above the shell 5 for easy maintenance. Most importantly, when the test model swings, due to the weight installed inside the truss 4, the truss 4 will generate a rotational shear force relative to the shell 5. The direction of this shear force is consistent with the spiral direction, so the mounting protrusions 11 and mounting slots 12 are less prone to deformation, thus ensuring the stability of its assembly and disassembly and enhancing the service life of the entire test model.

[0027] like Figure 2 As shown, the truss 4 comprises an outer frame consisting of at least four longitudinal beams 10. The longitudinal beams 10 are connected by connecting beams 9. Each connection point between the connecting beam 9 and the longitudinal beam 10 is equipped with an installation protrusion 11. The longitudinal beams 10 define the internal space of the entire truss 4. Due to the simulation nature of the experimental model, the shell 5 is mostly a columnar structure. The more longitudinal beams 10 there are, the larger the internal space of the truss 4. Figure 2Taking the six longitudinal beams 10 as an example, their cross-section is a regular hexagon, so their internal space is larger than that of the truss 4, which has a square cross-section. The connecting beams 9 connect the longitudinal beams 10 to form the truss 4 as a whole. As mentioned above, the cross-section of the truss 4 is a regular hexagon, which is equivalent to the circumcircle of the regular hexagon in the cross-section of the shell 5. Therefore, each connection between the connecting beams 9 and the longitudinal beams 10 is a corner of the regular hexagon. The best contact effect between the mounting protrusions 11 and the shell 5 is achieved at this position. Six mounting protrusions 11 are set, which is more stable than one mounting protrusion 11. Similarly, six mounting slots 12 also need to be set to fit it.

[0028] To ensure that truss 4 can serve as the main load-bearing component of the middle section model block 2, trusses 4 also need to be connected after the middle section model blocks 2 are assembled, such as... Figure 3 and Figure 4 As shown, the first connector 6 includes a plug 13 and a slot 17. The plug 13 is located at the end of one of the trusses 4, and the slot 17 is located at the end of the adjacent truss 4. After the plug 13 is inserted into the slot 17, it is fixed by a locking mechanism. The trusses 4 can be directly connected, which improves the overall integrity. The connection method of the plug 13 inserting into the slot 17 also improves the efficiency of disassembly and assembly. The locking mechanism is used to fix the connected trusses 4 to prevent the trusses 4 from separating and to transfer the stress point to the housing 5. The locking mechanism is described in detail below.

[0029] like Figure 4 As shown, the locking mechanism includes a locking block 15 disposed on the insert block 13 and a locking groove 18 disposed in the slot 17. The outer wall of the insert block 13 has a storage groove 14. The locking block 15 is mounted on the inner wall of the storage groove 14 by a torsion spring shaft 16. The torsion spring shaft 16 is used to provide the elastic force for the locking block 15 to pop out of the storage groove 14. A push block 20 is also installed on the top of the locking groove 18. The push block 20 is used to press the locking block 15 into the storage groove 14 through the locking groove 18. The locking mechanism uses a locking block 15 that engages with the slot 18 for locking. To prevent excessive gaps and potential wobbling after engagement, a storage slot 14 is provided on the locking block 15, allowing it to be stored within the slot. This means the slot 17 only needs to be the same size as the insert block 13. When the insert block 13 is inserted, the locking block 15 is inside the slot 18, not affecting the insertion of the insert block 13. Once the locking block 15 reaches the position in the slot 18, the torsion spring shaft 16 ejects the locking block 15, allowing it to smoothly enter the slot. 18. To limit the relative movement between the insert block 13 and the slot 17, a torsion spring shaft 16 is used as the ejection drive component for the card block 15. This is because the card block 15 needs to be able to rotate. When the insert block 13 first contacts the slot 17, the end of the card block 15 that first contacts the slot 17 is connected to the storage groove 14. As the insert block 13 continues to penetrate deeper into the slot 17, the card block 15 is squeezed into the storage groove 14. This is a rotational process, which is not easy to jam. Therefore, the torsion spring shaft 16 is used to drive the card block 15 to eject.

[0030] The above are all steps for inserting the plug 13 into the slot 17. Since the trusses 4 also need to be separated, the first connecting piece 6 unlocks the locking mechanism through the push block 20. The function of the push block 20 is to press the card block 15 back into the storage groove 14. In this way, the card block 15 leaves the slot 18, and the plug 13 can move in the slot 17 to achieve the unlocking operation. Since the push block 20 needs to provide the pushing force to squeeze the card block 15, a groove 19 is opened on the surface of the truss 4 with the slot 17. The groove 19 is connected to the slot 18. The top of the push block 20 is installed inside the groove 19 through the spring 21. Therefore, the groove 19 allows the push block 20 to be pushed from the outside of the truss 4. The groove 19 is also to prevent the push block 20 from being higher than the surface of the truss 4 and affecting the connection between the truss 4 and the shell 5. The spring 21 is used to facilitate the reset of the push block 20. Based on the connection method between the trusses 4, it can be seen that when splicing the middle section model block 2, the truss 4 located in the middle can first install the shell 5, and the trusses 4 located at both ends need to be connected to the middle truss 4 first, and then the shell 5 is installed. Similarly, when disassembling, the shells 5 at both ends must be separated from the shell 5 in the middle before the push block 20 can be operated to separate the trusses 4.

[0031] The shells 5 also need to be connected to each other to ensure the seamless integration of the middle model blocks 2 after assembly, such as... Figure 5 As shown, the second connector 7 includes a connecting ring 22 disposed at one end of one of the housings 5 ​​and a connecting groove 24 disposed on the adjacent housing 5. The connecting ring 22 and the connecting groove 24 are movably connected. A rubber sleeve 23 is fitted onto the outer wall of the connecting ring 22. The rubber sleeve 23 is used to fill the gap between the connecting ring 22 and the connecting groove 24. Since the trusses 4 are fixed together by a locking mechanism, and the housings 5 ​​are also fixed to the trusses 4, the housings 5 ​​are connected by a simple insertion of the connecting ring 22 into the connecting groove 24, without the need for a locking mechanism. Because the housings 5 ​​are connected to the trusses 4 by a screw installation, the connecting ring 22 is also provided so that it can be rotated and inserted into the connecting groove 24. The rubber sleeve 23 serves to seal the gap at the connection. The outer diameter of the rubber sleeve 23 at the end near the connecting groove 24 is smaller than the outer diameter at the other end. This tapered rubber sleeve 23 is used to facilitate insertion into the gap at the connection, resulting in a better sealing effect the deeper it is inserted, and it is also easier to separate, making it suitable for the connection and separation between the housings 5.

[0032] The simulation module includes a thermal emission module, a speed control module, and an attitude control module. Each module is independently mounted on truss 4 and electrically connected to each other via cables. Simulation module 8 is designed to enable the experimental model to perform the navigation capabilities of a real ship, facilitating the experiment. The thermal emission module, propulsion module, speed control module, and attitude control module all utilize existing simulation technologies, which will be briefly introduced here without further description.

[0033] The heat discharge module mainly consists of a heating water tank, a compensation water tank, a heating battery pack, a continuously variable pump, a flow sensor, a temperature sensor, heating rods, and solenoid valves. The heating water tank, connected to inlet and outlet pipes, heating rods, temperature sensors, water pumps, and flow sensors, is used to simulate the secondary cooling water of a real submarine. The compensation water tank, connected to inlet and outlet pipes, water pumps, and flow sensors, is used to compensate for weight loss after draining hot water during the experiment. The heating battery pack is mainly used to heat and maintain the water in the heating water tank. The discharge and intake of water in the heating water tank and compensation water tank are controlled by a combination of flow sensors, continuously variable pumps, and solenoid valves. To ensure accurate flow control, a set of sensors, solenoid valves, and water pumps is installed on both the port and starboard sides.

[0034] The speed control module consists of a propulsion motor, a thruster, a propulsion battery pack, a motor shaft system, and a fixed support. The propulsion motor drives the thruster to rotate, thus propelling the model forward. The propulsion battery pack provides power to the entire speed control system. The motor shaft system connects the propulsion motor and the thruster, transmitting the propulsion motor's speed and power. The fixed support is primarily used to secure the entire speed control system, ensuring that the shaft system's levelness, coaxiality, and watertightness meet requirements during system operation.

[0035] The attitude control module mainly consists of depth sensors, attitude adjustment tanks, water pumps, and solenoid valves. Depth sensors are positioned at multiple locations on the shell surface to measure depth information at different locations on the model shell, thereby determining the ship model's attitude. Attitude adjustment tanks are located at the fore and aft ends of the model, adjusting the model's center of gravity through water intake and exhaust to ensure the model's attitude meets experimental requirements. Furthermore, the attitude adjustment tanks can adjust the model's diving depth through water intake and exhaust to automatically adapt to different depth experimental conditions.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A test model for the infrared and wake characteristics of a ship's wake, comprising a bow model block (1), a mid-section model block (2), and a stern model block (3), wherein a simulation module (8) is installed within the mid-section model block (2), characterized in that, The middle section model block (2) is composed of multiple shells (5) connected and spliced ​​in sequence. Each shell (5) has a truss (4) installed inside. Adjacent trusses (4) are movably connected by a first connector (6), and adjacent shells (5) are movably connected by a second connector (7). The inner wall of the shell (5) is provided with a mounting groove (12), and the outer wall of the truss (4) is provided with a mounting protrusion (11). The mounting protrusion (11) matches the mounting groove (12). The mounting protrusion (11) is a spiral structure wrapped around the outer wall of the truss (4), and the mounting groove (12) is a spiral groove. The mounting protrusion (11) is spirally installed in the mounting groove (12).

2. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 1, characterized in that, The truss (4) includes an outer frame consisting of at least four longitudinal beams (10), which are connected by connecting beams (9). Each connection between the connecting beams (9) and the longitudinal beams (10) is provided with an installation protrusion (11).

3. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 1, characterized in that, The first connector (6) includes a plug (13) and a slot (17). The plug (13) is disposed at the end of one of the trusses (4), and the slot (17) is disposed at the end of the adjacent truss (4). The plug (13) is inserted into the slot (17) and then fixed by a locking mechanism.

4. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 3, characterized in that, The locking mechanism includes a locking block (15) disposed on the insert (13) and a locking groove (18) disposed in the slot (17). The outer wall of the insert (13) is provided with a storage groove (14). The locking block (15) is mounted on the inner wall of the storage groove (14) via a torsion spring shaft (16). The torsion spring shaft (16) is used to provide the elastic force for the locking block (15) to pop out of the storage groove (14). A push block (20) is also installed on the top of the locking groove (18). The push block (20) is used to push the locking block (15) into the storage groove (14) through the locking groove (18).

5. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 4, characterized in that, The truss (4) with the slot (17) has a groove (19) on its surface. The groove (19) is connected to the slot (18). The top of the push block (20) is installed inside the groove (19) by a spring (21).

6. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 1, characterized in that, The second connector (7) includes a connecting ring (22) disposed at one end of one of the housings (5) and a connecting groove (24) disposed on the adjacent housing (5). The connecting ring (22) and the connecting groove (24) are movably connected. A rubber sleeve (23) is fitted on the outer wall of the connecting ring (22). The rubber sleeve (23) is used to fill the gap between the connecting ring (22) and the connecting groove (24).

7. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 6, characterized in that, The outer diameter of the rubber sleeve (23) at one end near the connecting groove (24) is smaller than the outer diameter at the other end.

8. The experimental model for the infrared and wake characteristics of a ship's wake according to claim 1, characterized in that, The simulation module includes a heat emission module, a speed control module, and an attitude control module. Each module is independently installed on the truss (4) and electrically connected to each other via cables.

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