Ship wake flow infrared and wake characteristic test model

Abstract

The invention discloses a ship wake flow infrared and wake characteristic test model, and belongs to the technical field of ship wake flow tests, the ship wake flow infrared and wake characteristic test model comprises a head section model block, a middle section model block and a tail section model block, a simulation module is installed 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 installed in each shell, and the tail section model block is connected with the truss. 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 invention, 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] The invention relates to the technical field of ship wake test, and in particular to a ship wake infrared and wake characteristic test model. Background Art

[0002] The infrared and wake characteristics of ship wakes cover all disturbances caused by ship navigation to the surrounding environment. The ship wake infrared and wake characteristics test is one of the key technical means to master the ship wake characteristics. In the test process, in order to ensure that the test results can guide the design of the actual ship, the realization of relevant functions such as model navigation conditions and heat emission is an important way to ensure the quality of the test. In order to continuously improve the test results of ship wake infrared and wake characteristics, the optimization design of the test model is very necessary.

[0003] In order to ensure the convenience of use, most test models adopt a split design, which is also convenient for timely disassembly and maintenance when local faults occur. However, in order to ensure the stability of the entire model structure, a truss is usually installed in the shell to enhance the compressive resistance of the shell. In order to make it easy to pull the truss out of the shell, traditional test models usually adopt a slide rail connection. The slide rail is mostly straight and can be easily pulled out. However, since the test model needs to be tested underwater, changes in water flow will cause the model to swing left and right due to impact, and the rotational shear force caused by the swing of the linear track will cause the slide rail to deform, thereby affecting the pulling function and easily damaging the entire test model, which is not conducive to the use of existing test scenarios. Summary of the invention

[0004] The present invention aims to provide a ship wake infrared and wake characteristics test model to solve the problem that the above-mentioned traditional test model adopts a split design but is easily damaged at the disassembly and assembly parts. The model adopts a spiral structure to realize the assembly between the shell and the truss, has good resistance to rotational shear force, and is more durable and reliable.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A ship wake infrared and wake characteristics test model comprises a front section model block, a middle section model block and a rear section model block, wherein a simulation module is installed in the middle section model block, and the middle section model block is composed of a plurality of shells connected and spliced ​​in sequence, a truss is installed inside each shell, adjacent trusses are movably connected by a first connecting piece, and adjacent shells are movably connected by a second connecting piece, an installation groove is arranged on the inner wall of the shell, and an installation protrusion is arranged on the outer wall of the truss, the installation protrusion matches the installation groove, the installation protrusion is a spiral structure wound around the outer wall of the truss, and the installation groove is a spiral groove, and the installation protrusion is spirally installed in the installation groove.

[0007] Preferably, the truss comprises an outer frame composed of at least four longitudinal beams, the longitudinal beams are connected by connecting beams, and each connection between the connecting beams and the longitudinal beams is provided with a mounting protrusion.

[0008] Preferably, the first connecting member includes an insert block and a slot. The insert block is arranged at the end of one of the trusses, and the slot is arranged at the end of another adjacent truss. The insert block is inserted into the slot and fixed by a locking mechanism.

[0009] Preferably, the locking mechanism includes a card block arranged on the insertion block and a card slot arranged in the slot, a receiving slot is provided on the outer wall of the insertion block, the card block is installed on the inner wall of the receiving slot through a torsion spring shaft, the torsion spring shaft is used to provide elastic force for the card block to pop out of the receiving slot, and a push block is also installed on the top of the card slot, and the push block is used to pass through the card slot to press the card block into the receiving slot.

[0010] Preferably, a groove is provided on the surface of the truss provided with the slot, the groove is communicated with the card slot, and the top of the push block is installed inside the groove through a spring.

[0011] Preferably, the second connecting member includes a connecting ring arranged at the end of one of the shells and a connecting groove arranged on another adjacent shell, the connecting ring and the connecting groove are movably connected, the outer wall of the connecting ring is sleeved with a rubber sleeve, and the rubber sleeve is used to fill the gap between the connecting ring and the connecting groove.

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

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

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

[0015] 1. The entire middle section model block is arranged for segmented installation and disassembly, so that when a local failure occurs in the simulation module distributed in the middle section model block, it is convenient to inspect and maintain the designated area. A truss is installed in each shell of the middle section model block. The truss is convenient for fixing the simulation module and increasing the stability of the shell. The shell and the truss are assembled in a spiral manner, which not only meets the convenience of disassembly and assembly, but also the spiral structure makes the connection between the mounting protrusion and the mounting groove tighter. In particular, the model will swing during the simulation test. Because the swing in any direction is the same as the rotation direction of the spiral structure, the rotational shear force between the mounting protrusion and the mounting groove is not easy to affect the structure itself, so it is not easy to deform, and it is more stable and durable.

[0016] 2. In the present invention, the shells are connected by a second connecting piece, and the rubber sleeve of the second connecting piece can not only fix the connection between the two shells, but also effectively seal the gap between the second connecting pieces, thereby ensuring the sealing effect of the entire model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the test model of the present invention.

[0018] Figure 2 It is a cross-sectional schematic diagram of the assembly between the truss and the shell of the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure between the trusses of the present invention.

[0020] Figure 4 It is a schematic structural diagram of adjacent first connecting members of the present invention.

[0021] Figure 5 It is a schematic diagram of the connection structure between adjacent shells of the present invention.

[0022] In the figure: 1, first section, 2, middle section, 3, tail section, 4, truss, 5, shell, 6, first connecting member, 7, second connecting member, 8, simulation module, 9, connecting beam, 10, longitudinal beam, 11, mounting protrusion, 12, mounting groove, 13, plug block, 14, storage groove, 15, clamping block, 16, torsion spring shaft, 17, slot, 18, clamping slot, 19, groove, 20, push block, 21, spring, 22, connecting ring, 23, rubber sleeve, 24, connecting groove. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0024] like Figure 1 As shown, a ship wake infrared and wake characteristics test model is disclosed, including a front section model block 1, a middle section model block 2 and a tail section model block 3, a simulation module 8 is installed in the middle section model block 2, the middle section model block 2 is composed of a plurality of 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 connecting member 6, and adjacent shells 5 are movably connected by a second connecting member 7, an inner wall of the shell 5 is provided with a mounting groove 12, an outer wall of the truss 4 is provided with a mounting protrusion 11, the mounting protrusion 11 and the mounting groove 12 match each other, the mounting protrusion 11 is a spiral structure wound around the outer wall of the truss 4, the mounting groove 12 is a spiral groove, and 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 to provide 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 adopt a pre-set installation port or a rivet installation connection method. The first section model block 1 is mainly used to reduce the resistance of the test model traveling in the water, while the tail section model block 3 is installed with a propeller to provide forward power. Since the simulation module 8 is installed in the middle section model block 2, the middle section model block 2 is divided into multiple sections for assembly, which is conducive to the uniform distribution of the various components of the simulation module 8 in each section, and it is convenient to disassemble the corresponding section in time for maintenance when 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 a plurality of installation stations are set on the truss 4 to facilitate the installation of the simulation module 8. The adjacent trusses 4 are connected by a first connecting member 6, and the adjacent shells 5 are connected by a second connecting member 7, thus forming an integral middle section model block 2. Since the simulation module 8 is installed in the truss 4, and the truss 4 is installed in the shell 5, in order to facilitate the disassembly and assembly of the simulation module 8, the truss 4 and the shell 5 are designed to be movably connected, so that the truss 4 and the shell 5 can be easily separated for maintenance operations.

[0026] like Figure 2 and Figure 3 As shown, the truss 4 and the shell 5 adopt an active assembly method of mounting protrusions 11 and mounting grooves 12. Different from the traditional assembly, the mounting protrusion 11 is a spiral structure, and its spiral direction is along the length direction of the truss 4. The corresponding mounting groove 12 also adopts a spiral structure. In this way, the installation process is a spiral assembly between the shell 5 and the truss 4. Using this method instead of the traditional straight rail installation can facilitate the relative displacement between the shell 5 and the truss 4, and ensure that the simulation module 8 can be exposed from the shell 5 for easy maintenance. The most important point is that when the test model swings, due to the heavy objects installed inside the truss 4, the truss 4 will generate a rotational shear force relative to the shell 5, and the direction of this shear force is consistent with the spiral direction. In this way, the mounting protrusion 11 and the mounting groove 12 are not easy to deform, thereby ensuring its disassembly and assembly stability and enhancing the service life of the entire test model.

[0027] like Figure 2 As shown, the truss 4 includes an outer frame composed of at least four longitudinal beams 10. The longitudinal beams 10 are connected by connecting beams 9. Each connection between the connecting beams 9 and the longitudinal beams 10 is provided with a mounting protrusion 11. The longitudinal beams 10 are used to determine the internal space of the entire truss 4. Due to the simulation of the test model, the shell 5 is mostly a columnar structure. The more longitudinal beams 10 are, the larger the internal space of the truss 4 is. Figure 2Taking six longitudinal beams 10 as an example, their cross-section is a regular hexagon, so their internal space is larger than the truss 4 with a square cross-section. The connecting beam 9 connects the longitudinal beams 10 to form a truss 4 as a whole. As mentioned above, the cross-section of the truss 4 is a regular hexagon, which is equivalent to the circular cross-section of the shell 5 being the circumscribed circle of the regular hexagon. Therefore, each connection between the connecting beam 9 and the longitudinal beam 10 is the corner of the regular hexagon. The installation protrusion 11 is set at this position to have the best contact effect with the shell 5. Six installation protrusions 11 are set, which is more stable than one installation protrusion 11. Similarly, six corresponding installation grooves 12 also need to be set to be able to adapt to it.

[0028] In order to ensure that the trusses 4 can serve as the main force-bearing components of the middle model block 2, the trusses 4 also need to be connected after the middle model blocks 2 are spliced. Figure 3 and Figure 4 As shown, the first connecting member 6 includes an insert block 13 and a slot 17. The insert block 13 is arranged at the end of one of the trusses 4, and the slot 17 is arranged at the end of another adjacent truss 4. The insert block 13 is inserted into the slot 17 and fixed by a locking mechanism. The trusses 4 can be directly connected, which has better integrity. The connection method of inserting the insert block 13 into the slot 17 also improves the efficiency of disassembly and assembly. The locking mechanism is used to fix the connected trusses 4 to avoid separation between the trusses 4 and transfer the force point to the shell 5. The locking mechanism is described in detail below.

[0029] like Figure 4 As shown, the locking mechanism includes a card block 15 arranged on the plug block 13 and a card slot 18 arranged in the slot 17. The outer wall of the plug block 13 is provided with a storage slot 14. The card block 15 is installed on the inner wall of the storage slot 14 through a torsion spring shaft 16. The torsion spring shaft 16 is used to provide elastic force for the card block 15 to pop out of the storage slot 14. A push block 20 is also installed on the top of the card slot 18. The push block 20 is used to pass through the card slot 18 to press the card block 15 into the storage slot 14. The locking mechanism locks by inserting the card block 15 into the card slot 18. In order to avoid the large gap after insertion and easy shaking, a storage slot 14 is set on the card block 15, so that the card block 15 can be stored in the storage slot 14. In this way, the size of the slot 17 only needs to be set to be consistent with the insertion block 13. When the insertion block 13 is inserted, the card block 15 is inside the card slot 18 and does not affect the insertion of the insertion block 13. Until the card block 15 reaches the position of the card slot 18, the torsion spring shaft 16 pops out the card block 15 and smoothly enters the card slot. 18, limit the relative movement of the plug block 13 and the slot 17, here the torsion spring shaft 16 is used as the ejection driving component of the card block 15, because the card block 15 needs to be able to rotate. This is because when the plug block 13 just starts to contact the slot 17, the card block 15 first contacts the end of the slot 17 connected to the receiving slot 14. As the plug block 13 continues to go deeper into the slot 17, the card block 15 is squeezed into the receiving slot 14. This is a rotation process and is not easy to get stuck, so the torsion spring shaft 16 is used to drive the card block 15 to pop out.

[0030] The above are all steps of inserting the plug block 13 into the slot 17, and the trusses 4 also need to be disassembled, so the first connecting member 6 unlocks the locking mechanism through the push block 20. The function of the push block 20 is to press the card block 15 into the storage slot 14 again, so that the card block 15 leaves the card slot 18, and the plug block 13 can move in the slot 17 again to achieve the unlocking operation. Since the push block 20 needs to provide a thrust to squeeze the card block 15, a groove 19 is provided on the surface of the truss 4 with the slot 17. The groove 19 is connected to the card slot 18, and the top of the push block 20 is installed in the inside of the groove 19 through a spring 21. Therefore, the groove 19 can be used to enable the push block 20 to be pushed on 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 resetting of the push block 20. According to 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 be installed with the shell 5 first, and the trusses 4 located at both ends need to be connected to the truss 4 in the middle first, and then the shell 5 is installed. When splitting, the shells 5 at both ends are separated from the shells 5 in the middle first, and then the push block 20 can be operated to achieve the separation between the trusses 4.

[0031] The shells 5 also need to be connected to each other to ensure the integrated effect after the middle section model blocks 2 are spliced. Figure 5 As shown, the second connecting member 7 includes a connecting ring 22 arranged at the end of one of the shells 5 and a connecting groove 24 arranged on the adjacent other shell 5. The connecting ring 22 and the connecting groove 24 are movably connected. The outer wall of the connecting ring 22 is sleeved with a rubber sleeve 23. 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 by a locking mechanism, and the shells 5 and the trusses 4 are also fixed, the shells 5 are connected by a simple plug-in method of the connecting ring 22 and the connecting groove 24, without the need for locking by a locking mechanism. Because the shell 5 is connected to the truss 4 by a spiral installation method, the connecting ring 22 is also provided to be able to be rotatably inserted into the connecting groove 24, and the rubber sleeve 23 plays the role of sealing the gap at the connection. The outer diameter of the rubber sleeve 23 near one end of the connecting groove 24 is smaller than the outer diameter of the other end. The use of this rubber sleeve 23 with a conical cross section is to facilitate the deep penetration of the gap at the connection. The deeper it penetrates, the better the sealing effect is, and it is also easier to separate, which is suitable for the connection and separation between the shells 5.

[0032] The simulation module includes a heat emission module, a speed control module and an attitude control module. Each module is independently mounted on the truss 4 and electrically connected to each other through cables. The simulation module 8 is to enable the test model to perform the navigation capability of a real ship and facilitate the test. The heat emission module, the propulsion module, the speed control module and the attitude control module all belong to the existing simulation technology, and a brief introduction is given here without further description.

[0033] The heat discharge module mainly consists of a heating water tank, a compensating water tank, a heating battery pack, a stepless regulating pump, a flow sensor, a temperature sensor, a heating rod, a solenoid valve, etc. The heating water tank is connected to the inlet and outlet pipes, the heating rod, the temperature sensor, the water pump, the flow sensor and other equipment to simulate the cooling water of the secondary circuit of the real boat. The compensating water tank is connected to the inlet and outlet pipes, the water pump and the flow sensor to compensate for the weight loss after the hot water is drained during the test. The heating battery pack is mainly used to heat and maintain the water in the heating water tank. The discharge and suction of water in the heating water tank and the compensating water tank are controlled by a combination of a flow sensor, a stepless regulating water pump and a solenoid valve. In order to ensure the accuracy of flow control, a set of sensors, solenoid valves and water pumps must be arranged on both sides.

[0034] The speed control module consists of a propulsion motor, a propeller, a propulsion battery pack, a motor shaft system and a fixed bracket. The propulsion motor is used to drive the propeller to rotate, thereby realizing the forward movement of the model. The propulsion battery pack provides power for the entire speed control system. The motor shaft system is used to connect the propulsion motor and the propeller to achieve the transmission of propulsion motor speed and power. The fixed bracket is mainly used to fix the entire speed control system to ensure that the horizontality, coaxiality and watertightness of the shaft system meet the requirements during the operation of the system.

[0035] The attitude control module is mainly composed of depth sensors, attitude adjustment water tanks, water pumps and solenoid valves. The depth sensors are arranged at multiple positions on the shell surface to measure the depth information at different positions of the model shell, thereby realizing the judgment of the ship model's attitude. The attitude adjustment water tanks are arranged at the front and rear ends of the model, and the weight center of the model is adjusted by absorbing and discharging water to ensure that the model's attitude meets the test requirements. In addition, the attitude adjustment water tank can adjust the model's diving depth by discharging and absorbing water, so as to automatically adapt to different depth test conditions.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A ship wake infrared and wake characteristics test model, comprising a front section model block (1), a middle section model block (2) and a rear section model block (3), wherein a simulation module (8) is installed in the middle section model block (2), characterized in that: The middle section model block (2) is composed of a plurality of shells (5) connected and spliced ​​in sequence, a truss (4) is installed inside each shell (5), adjacent trusses (4) are movably connected via a first connecting member (6), and adjacent shells (5) are movably connected via a second connecting member (7), an installation groove (12) is provided on the inner wall of the shell (5), and an installation protrusion (11) is provided on the outer wall of the truss (4), the installation protrusion (11) and the installation groove (12) match each other, the installation protrusion (11) is a spiral structure wound around the outer wall of the truss (4), the installation groove (12) is a spiral groove, and the installation protrusion (11) is spirally installed in the installation groove (12).

2. A ship wake infrared and wake characteristics test model according to claim 1, characterized in that: The truss (4) comprises an outer frame composed of at least four longitudinal beams (10), the longitudinal beams (10) are connected by connecting beams (9), and each connection between the connecting beams (9) and the longitudinal beams (10) is provided with a mounting protrusion (11).

3. A ship wake infrared and wake characteristics test model according to claim 1, characterized in that: The first connecting member (6) comprises an insert block (13) and a slot (17); the insert block (13) is arranged at the end of one of the trusses (4); the slot (17) is arranged at the end of another adjacent truss (4); and the insert block (13) is fixed by a locking mechanism after being inserted into the slot (17).

4. A ship wake infrared and wake characteristics test model according to claim 3, characterized in that: The locking mechanism comprises a card block (15) arranged on the insert block (13) and a card slot (18) arranged in the slot (17); the outer wall of the insert block (13) is provided with a receiving slot (14); the card block (15) is installed on the inner wall of the receiving slot (14) through a torsion spring shaft (16); the torsion spring shaft (16) is used to provide elastic force for the card block (15) to pop out of the receiving slot (14); a push block (20) is also installed on the top of the card slot (18); the push block (20) is used to pass through the card slot (18) to press the card block (15) into the receiving slot (14).

5. A ship wake infrared and wake characteristics test model according to claim 4, characterized in that: A groove (19) is provided on the surface of the truss (4) provided with the slot (17), the groove (19) is communicated with the clamping groove (18), and the top of the push block (20) is installed inside the groove (19) through a spring (21).

6. A ship wake infrared and wake characteristics test model according to claim 1, characterized in that: The second connecting member (7) comprises a connecting ring (22) arranged at the end of one of the shells (5) and a connecting groove (24) arranged on another adjacent shell (5), the connecting ring (22) and the connecting groove (24) being movably connected, the outer wall of the connecting ring (22) being sleeved with a rubber sleeve (23), and the rubber sleeve (23) being used to fill a gap between the connecting ring (22) and the connecting groove (24).

7. A ship wake infrared and wake characteristics test model according to claim 6, characterized in that: The outer diameter of the rubber sleeve (23) at one end close to the connecting groove (24) is smaller than the outer diameter of the other end.

8. A ship wake infrared and wake characteristics test model according to claim 1, characterized in that: The simulation module comprises a heat emission module, a speed control module and an attitude control module, each module being independently mounted on the truss (4) and electrically connected to each other via cables.

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