Ship model capturing device for hydrodynamic self-propelled model test
By designing a ship model capture device, which uses a motor-driven collar to hold the ship model fixing rod, the difficulties in manual capture and cable interference caused by the large inertia at the end of the self-propelled ship model test were solved, achieving fast and safe ship model capture and accurate experimental data.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI SHIP & SHIPPING RES INST CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-04-17
AI Technical Summary
In existing technologies, the inertia of self-propelled ship model tests is large at the end, making manual capture difficult and posing safety hazards; while using cables for capture affects experimental data.
Design a ship model capturing device, including a rotating shaft, a drive unit, a damper, and a rotating sleeve rod. The device uses a motor to drive a collar to fit around the ship model fixing rod, and the damper controls the rotation of the rotating sleeve rod to achieve rapid capturing of the ship model, avoiding human intervention and cable interference.
It enables rapid capture of self-propelled boat models, avoids human intervention and cable interference, ensures the accuracy of experimental data, and improves operational safety.
Smart Images
Figure CN224131272U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ship model experimentation, specifically a ship model capture device for hydrodynamic self-propelled model testing. Background Technology
[0002] In the self-propelled model tests of hydrodynamic research, the model boat and the test trailer are not fixed, but rather rely on their own power to navigate autonomously in the test pool as required. That is, the model boat itself and the test trailer move independently using their respective power systems. The test trailer only needs to follow the model boat and record test data through the cable bundle connected to it. When the test ends, the test trailer decelerates rapidly under the action of its braking system. Although the self-propelled model boat's power system has also been shut down, it will still continue to move in its original direction due to its own inertia. At this point, it is necessary to immediately decelerate and catch up with the self-propelled model boat to prevent excessive positional deviation between the model boat boat and the test trailer, which could pull on the cable bundle and damage the test equipment.
[0003] There are currently two methods for capturing self-propelled ship models:
[0004] One method involves the operator standing on a trailer and securing a wooden pole with a collar to a fixed position on the trailer. When the trailer slows down at the end of the test, the collar is used to secure the self-propelled model, forcibly slowing it down and stopping its inertial motion. While this method doesn't interfere with the test data, the model's inherent inertia makes manually stopping it extremely difficult, requiring at least 2-3 people simultaneously. Furthermore, the operators must stand on the edge of the trailer and exert considerable force, increasing the risk of falling into the water. Therefore, this method poses a safety hazard. Another method involves arranging lightweight, flexible cables around the self-propelled model. During the test, one end of the cable is fixed to the model, and the other end to the trailer. When the trailer slows down at the end of the test, the model is restrained by the cable and slows down simultaneously, limiting its positional deviation from the trailer and preventing damage to the test equipment from the cable bundle. Although this method does not require human intervention and has no safety hazards, the presence and limitations of the cable inevitably have an adverse effect on and interfere with the test data of the self-propelled model aircraft. Summary of the Invention
[0005] This invention provides a ship model capture device for hydrodynamic self-propelled model testing, which can solve the problems of the danger of manually reducing the inertia of the ship model and the interference of the cable reduction of the ship model's inertia on the experimental data of the ship model.
[0006] The present invention relates to a boat model capturing device for hydrodynamic self-propelled model testing, which is installed on a trailer and includes a rotating shaft, a drive device, a damper installed between the output shaft of the drive device and the rotating shaft, and a rotating sleeve rod fixed to one side of the outer circumference of the rotating shaft and rotating synchronously with the rotating shaft. One end of the damper is connected to the output shaft synchronously and the other end is connected to the rotating shaft synchronously. The rotating sleeve rod is provided with a collar, which can be fitted around the outer circumference of the fixed rod of the boat model.
[0007] Preferably, the damper includes a first housing fixed to the output shaft and a second housing fixed to the rotation shaft, forming an annular cavity between the first housing and the second housing. The cavity is provided with a first partition block and a second partition block to divide the cavity into two circumferentially extending first damping cavities and second damping cavities. The first partition block is fixed to the first housing, and the second partition block is fixed to the second housing. The first damping cavity and the second damping cavity are respectively provided with compressible and expandable damping elements.
[0008] Preferably, the damping element is a telescopic spring extending along the first damping cavity or the second damping cavity.
[0009] Preferably, the rotating shaft includes cylindrical sections at both ends and a long strip section between the two cylindrical ends, and the counterweight is fixed to the long strip section.
[0010] Preferably, the rotating sleeve is in the shape of a triangular plate, with one side of the triangular plate fixed to the rotating shaft, and a groove penetrating both sides of the triangular plate is provided at the corner opposite to the side, and the collar is fixedly embedded in the groove.
[0011] Preferably, the collar is made of carbon fiber reinforced nylon.
[0012] Preferably, the ship model capturing device includes a following state and a capturing state. In the following state, the rotating sleeve is pointed upwards, and the collar disengages from the fixed rod of the ship model. In the capturing state, the collar is fitted over the fixed rod of the ship model.
[0013] Preferably, the model boat capturing device also includes a retracted state, in which the rotating sleeve rotates to be below the bottom of the trailer and parallel to the bottom of the trailer.
[0014] Compared with existing technologies, this invention has the following advantages: When capturing a model boat, the driving device is manipulated to rotate the rotating sleeve, causing the collar to fit over the fixed rod of the model boat, thus allowing the model boat and the tugboat to reach the same speed in a very short time. Before the experiment begins, because the model boat itself has low acceleration, a tugboat can pass by to quickly accelerate it. After the experiment is completed, the model boat capturing device of this invention can be used to capture the model boat and slow it down. There is no need to manually counteract the inertia of the model boat. Furthermore, during the experiment, the model boat capturing device detaches from the model boat, so it will not affect the experimental data. In addition, the damper allows the rotating sleeve to rotate upwards within a certain range, so the collar will follow the movement of the fixed rod of the model boat, keeping the fixed rod within the collar. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of a boat model capture device for hydrodynamic self-propelled model testing installed on a trailer, according to an embodiment of the present invention.
[0016] Figure 2 This is a schematic diagram of the structure of a boat model capture device for hydrodynamic self-propelled model testing installed on a trailer in the left view direction, according to an embodiment of the present invention.
[0017] Figure 3 This is a schematic diagram of the structure of a ship model capture device for hydrodynamic self-propelled model testing according to an embodiment of the present invention.
[0018] Figure 4 This is a schematic diagram of the structure of the spring damper of the boat model capture device for hydrodynamic self-propelled model testing according to an embodiment of the present invention, after the first shell is cut open.
[0019] Figure 5 This is an exploded view of the spring damper of a boat model capture device for hydrodynamic self-propelled model testing according to an embodiment of the present invention.
[0020] Figure 6 is a schematic diagram of the state of the ship model capture device for hydrodynamic self-propelled model testing according to an embodiment of the present invention when the ship model is rocking.
[0021] Figure 7 This is a schematic diagram of a ship model capture device for hydrodynamic self-propelled model testing in a following state, according to an embodiment of the present invention.
[0022] Figure 8 This is a schematic diagram of a ship model capture device for hydrodynamic self-propelled model testing in the retracted state, according to an embodiment of the present invention.
[0023] Figure Labels
[0024] 1. Ship model capturing device; 11. Rotating shaft; 12. Drive device; 13. Rotating sleeve rod; 131. Collar; 132. Hollowed-out; 133. Reinforcing plate; 134. Reinforcing rib; 14. Damper; 141. First housing; 142. Second housing; 143. First partition block; 144. Second partition block; 145. First damping cavity; 146. Second damping cavity; 147. First spring; 148. Second spring; 15. Base; 16. Counterweight; 17. Bearing.
[0025] 2 ship models, 21 fixing rods;
[0026] 3 trailers;
[0027] 4. Cables;
[0028] 5. Horizontal plane. Detailed Implementation
[0029] This utility model provides a boat model capture device 1 for hydrodynamic self-propelled model boat testing, such as... Figure 1 and Figure 2 As shown, the model boat capture device 1 is installed on the trailer 3. Figure 1 and Figure 2 The image shows a portion of the trailer 3. In this embodiment, two boat model capturing devices 1 are located on the side of the trailer 3 near the bottom. These devices are used to capture the fixed rods 21 near the bow and stern of the boat model 2, respectively. When the boat model 2 is horizontal, the fixed rods 21 extend vertically upwards from the boat model 2. The data acquisition cable 4 of the boat model 2 is connected to the trailer 3. Figure 3 As shown, the ship model capturing device 1 includes a rotating shaft 11, a driving device 12 for driving the rotating shaft 11 to rotate, a damper 14 installed between the output shaft of the driving device 12 and the rotating shaft 11, and a rotating sleeve member 13 fixed to one side of the outer circumference of the rotating shaft 11 and rotating synchronously with the rotating shaft 11. In this embodiment, the driving device 12 includes a motor and a reducer, the output shaft of the reducer being the output shaft of the driving device 12. One end of the damper 14 is synchronously connected to the output shaft and the other end is synchronously connected to the rotating shaft 11. The rotating sleeve member 13 is provided with a collar 131, which can be fitted over the fixing rod 21 of the ship model 2.
[0030] When it is necessary to capture the model boat 2, the drive device 12 is manipulated to rotate the rotating sleeve 13, causing the collar 131 to fit over the fixed rod 21 of the model boat 2, thereby allowing the model boat 2 and the tugboat to reach the same speed in a very short time. Before the experiment begins, since the acceleration of the model boat 2 itself is small, it can be rapidly accelerated by the trailer 3. After the experiment is completed, the model boat 2 can be captured and decelerated by the model boat catching device 1 of this invention. There is no need to manually counteract the inertia of the model boat 2. At the same time, during the experiment, the model boat catching device 1 disengages from the model boat 2, which will not affect the experimental data. When the model boat catching device 1 captures the model boat 2, the motor stops at a certain angle, one end of the damper 14 stops rotating, and the model boat 2 will roll, pitch, sway, and undulate under the action of the waves, such as... Figure 2 And as shown in Figure 6. In Figure 2 In the middle, the ship model 2 rolls to the right while its left side rises. The damper 14 allows the rotating sleeve 13 to rotate upward within a certain range. Therefore, the collar 131 will follow the movement of the fixed rod 21 of the ship model 2, keeping the fixed rod 21 within the collar 131. Figure 6a In the middle, the ship model 2 rolls to the left, its left side descends, and the damper 14 allows the rotating sleeve 13 to rotate downwards as well, causing the collar 131 to descend. Figure 6b During the process, the model boat 2 experiences longitudinal rocking, with the front end rising while the stern end descends. The damper 14 of the model boat catching device 1 at the front end allows the rotating sleeve 13 connected to it to rise, while the damper 14 of the model boat catching device 1 at the rear end allows the rotating sleeve 13 connected to it to descend. In these states, the collar 131 always follows the root of the fixed rod 21, preventing the fixed rod 21 from detaching.
[0031] like Figure 4 and Figure 5 As shown, in this embodiment, the damper 14 is a spring damper, including a first housing 141 fixed to the output shaft and a second housing 142 fixed to the rotation shaft 11. An annular cavity is formed between the first housing 141 and the second housing 142. A first partition block 143 and a second partition block 144 are provided within the cavity to divide it into two circumferentially extending first damping cavities 145 and second damping cavities 146. The first partition block 143 is fixed to the first housing 141, and the second partition block 144 is fixed to the second housing 142. The first damping cavity 145 and the second damping cavity 146 are respectively provided with compressible and extendable damping elements, which are extension springs 147 and 148 extending along the first damping cavity 145 or the second damping cavity 146. When the rotating sleeve rotates downwards, i.e. Figure 4 and Figure 5When the rotating sleeve rotates clockwise, the first spring 147 on the lower (right) side is compressed, while the second spring 148 on the upper (left) side is extended. When the rotating sleeve rotates upward, the second spring 148 on the upper side is compressed, while the first spring 147 on the lower side is extended.
[0032] like Figure 3 As shown, the rotating shaft 11 has a counterweight 16 on the outer side opposite to the rotating sleeve member 13. When the rotating sleeve member 13 rotates downwards to its position, but the collar 131 does not engage the fixing rod 21, the rotating sleeve member needs to be rotated back to its original position. At this time, the counterweight 16 can balance the weight of the rotating sleeve member 13, allowing the motor to start the rotation of the rotating sleeve member 13 with less power, and simultaneously allowing the rotating sleeve member 13 to rotate upwards more quickly. In this embodiment, the counterweight 16 is elongated, extending from one end of the rotating shaft 11 to the other end.
[0033] In this embodiment, the rotating shaft 11 includes cylindrical sections at both ends and an elongated section between the two cylindrical sections, which are integrally formed. Two bearings 17 are respectively installed on the two cylindrical sections. The rotating sleeve 13 and the counterweight 16 are fixed to the elongated section, which is easier and more stable to fix to the elongated section.
[0034] The rotating sleeve 13 is triangular in shape. One side of the triangular plate is fixed to the rotating shaft 11. A groove is formed at the corner opposite to this side, penetrating both sides of the triangular plate. The collar 131 is fixedly embedded in the groove. The triangular plate provides a stable structure and sufficient strength. Reinforcing plates 133 perpendicular to the triangular plate are also provided along its three sides, and reinforcing ribs 134 are provided between the reinforcing plates. In addition, the triangular plate has multiple hollows 132, which can reduce water resistance. The collar 131 is made of carbon fiber reinforced nylon, which has high strength and can withstand the huge inertial impact generated when the boat model 2 is forcibly decelerated. In addition, it is lightweight and wear-resistant, and will not cause excessive damage to the wooden boat model itself when the sleeve rotates.
[0035] The model ship capture device 1 includes a following state and an acceleration / deceleration state, such as... Figure 7 As shown, in the following state, rotating the sleeve 13 points upwards, and the collar 131 disengages from the fixing rod 21 of the boat model 2. In the acceleration / deceleration or capture speed state, as shown in Figure 6, the collar 131 is fitted over the fixing rod 21 of the boat model 2. The boat model capturing device 1 also includes a retracted state, as shown... Figure 8 As shown, in the retracted state, the rotating sleeve 13 rotates to below the bottom of the trailer 3 and is parallel to the bottom of the trailer 3.
[0036] In this embodiment, a controller (not shown in the figure) connected to the motor can be installed on the trailer 3. By operating the controller, the motor can rotate the rotating shaft 11 at different angles, thereby causing the rotating sleeve 13 to be in different positions and in different states.
[0037] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Various modifications or equivalent substitutions made by those skilled in the art within the spirit and scope of this utility model also fall within the scope of protection of this utility model.
Claims
1. A boat model capturing device for hydrodynamic self-propelled model aircraft testing, characterized in that, Mounted on a trailer, the device includes a rotating shaft, a drive unit, a damper installed between the output shaft of the drive unit and the rotating shaft, and a rotating sleeve fixed to one side of the outer circumference of the rotating shaft and rotating synchronously with the rotating shaft. One end of the damper is connected to the output shaft and the other end is connected to the rotating shaft synchronously. The rotating sleeve is provided with a collar that can be fitted around the outer circumference of the fixing rod of the model boat. The rotating shaft has a counterweight on the outer wall of the side opposite to the rotating sleeve.
2. A ship model capture device according to claim 1, characterised in that, The damper includes a first housing fixed to the output shaft and a second housing fixed to the rotation shaft. An annular cavity is formed between the first housing and the second housing. The cavity is provided with a first partition block and a second partition block to divide the cavity into two circumferentially extending first damping cavities and second damping cavities. The first partition block is fixed to the first housing, and the second partition block is fixed to the second housing. The first damping cavity and the second damping cavity are respectively provided with compressible and expandable damping elements.
3. A ship model capture device according to claim 2, wherein, The damping element is a telescopic spring extending along the first damping cavity or the second damping cavity.
4. The ship model capture apparatus according to claim 1, characterized by The counterweight is long and extends from one end of the rotating shaft to the other end.
5. A ship model capture device according to claim 4, characterised in that, The rotating shaft includes cylindrical sections at both ends and a long strip section between the two cylindrical ends, and the rotating sleeve and the counterweight are fixed to the long strip section.
6. The ship model capturing device according to claim 1, characterized in that, The rotating sleeve is in the shape of a triangular plate. One side of the triangular plate is fixed to the rotating shaft. A groove is provided at the corner opposite to the side, passing through both sides of the triangular plate. The collar is fixedly embedded in the groove.
7. A ship model capture device according to claim 6, characterised in that, The collar is made of carbon fiber reinforced nylon.
8. The boat model capture device of claim 1, wherein, The ship model capturing device includes a following state and a capturing state. In the following state, the rotating sleeve is pointed upwards, and the collar disengages from the fixed rod of the ship model. In the capturing state, the collar is fitted over the fixed rod of the ship model.
9. A ship model capture device according to claim 8, characterised in that, The model boat capture device also includes a retracted state, in which the rotating sleeve rotates to be below the bottom of the trailer and parallel to the bottom of the trailer.