Ship model capturing device for hydrodynamic self-propelled model test
By designing a ship model capture device, the rapid capture of self-navigated ship model is achieved using rotary sleeve rods and dampers, solving the problems of human capture difficulties and cable interference, ensuring experimental safety and data accuracy.
Patent Information
- Application Number
- CN202510780483.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-07-22
AI Technical Summary
In the prior art, the self-ship model has a high inertia at the end of the test, and it is difficult to capture manpower and has safety risks. The cable capture method affects the experimental data.
A ship model capture device is designed, including a rotating shaft, a drive device and a damper. The ship model fixing rod is placed through a rotating sleeve rod, and the rotating sleeve rod is controlled by a damper to achieve rapid capture of the ship model and avoid human intervention and cable interference.
It realizes rapid capture of self-ship models, avoids human safety hazards and interference from experimental data, and ensures the accuracy and safety of experimental data.
Smart Images
Figure CN120348424A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of ship model experiments, and particularly to a ship model capturing device for hydrodynamic self-propelled model tests. Background Art
[0002] In the self-propelled model test of hydrodynamic research, the ship model and the test trailer are not fixed, but rely on their own power to navigate independently in the test water tank as required. That is, the ship model itself and the test trailer are driven independently by their respective power systems. The test trailer only needs to follow the ship model and record the test data through a cable bundle connected to the ship model. When the test is over, the test trailer decelerates rapidly under the action of the braking system. Although the self-propelled ship model has also shut down its power system, it will still move forward in the original driving direction under the action of its own inertia. At this time, it is necessary to immediately decelerate and capture the self-propelled ship model to avoid excessive position deviation between the self-propelled ship model and the test trailer, which may pull the cable bundle and cause damage to the test equipment.
[0003] Currently, there are two ways to capture the self-propelled ship model:
[0004] One way is that the test operator stands on the trailer, clamps a wooden rod with a collar on a fixed position on the trailer. When the trailer decelerates at the end of the test, the operator uses the collar to put on the fixed rod of the ship model, and forcibly decelerates and captures the self-propelled ship model to stop its inertial motion. Although this method does not interfere with the test data of the self-propelled model test, due to the large inertia of the ship model itself, it is very laborious to rely on manpower to stop the inertial motion of the self-propelled ship model. At least 2-3 people need to operate simultaneously to capture the ship model and stop its motion. Moreover, the operator must stand on the edge of the trailer and use a large amount of force to operate, and it is very easy to fall into the water tank accidentally. Therefore, this method still has certain safety hazards. Another way is to arrange light soft cables around the self-propelled ship model. During the experiment, one end of the soft cable is fixed to the self-propelled ship model, and the other end is fixed to the trailer. When the trailer decelerates at the end of the test, the self-propelled ship model is restricted by the cable and decelerates at the same time, and the position deviation from the trailer is also restricted within a small range, and the cable bundle will not be pulled to damage the test equipment. Although this method does not require manual participation and has no safety hazards, due to the existence and restriction of the cable, it will inevitably have an adverse impact and interference on the test data of the self-propelled model. Summary of the Invention
[0005] The present invention provides a ship model capturing device for hydrodynamic self-propelled model tests, which can solve the problems of the danger of reducing the inertia of the ship model by manpower and the interference of reducing the inertia of the ship model by the cable to the experimental data of the ship model.
[0006] The boat model capturing device for hydrodynamic self-propelled model tests of the present invention is installed on a trailer and includes a rotating shaft, a driving device, a damper installed between the output shaft of the driving device and the rotating shaft, and a rotating sleeve rod fixed to one side of the circumferential outer wall of the rotating shaft and rotating synchronously with the rotating shaft. One end of the damper is connected to the output shaft to rotate synchronously, and the other end is connected to the rotating shaft to rotate synchronously. The rotating sleeve rod is provided with a collar that can be sleeved on 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 rotating 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 that 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 damping objects that can be compressed and extended.
[0008] Preferably, the damping object 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. The counterweight is fixed to the long strip section.
[0010] Preferably, the rotating sleeve rod is in the shape of a triangular plate. One side of the triangular plate is fixed to the rotating shaft, and a groove penetrating both sides of the triangular plate is provided at the corner opposite to this side. The collar is fixedly embedded in the groove.
[0011] Preferably, the collar is made of carbon fiber reinforced nylon.
[0012] Preferably, the boat model capturing device includes a following state and a capturing state. In the following state, the rotating sleeve rod points upward, and the collar is separated from the fixed rod of the boat model. In the capturing state, the collar is sleeved outside the fixed rod of the boat model.
[0013] Preferably, the boat model capturing device further includes a retracted state. In the retracted state, the rotating sleeve rod rotates below the bottom of the trailer and is parallel to the bottom of the trailer.
[0014] The present invention has the following beneficial effects compared with the prior art: When it is necessary to capture the ship model, the driving device is manipulated to rotate the rotating sleeve rod member, so that the collar is sleeved on the outer periphery of the fixed rod of the ship model, thereby enabling the ship model and the tugboat to reach the same speed in a very short time. Before the experiment starts, since the acceleration of the ship model itself is small, the trailer can be used to quickly increase the speed of the ship model. After the experiment is completed, the ship model capture device of the present invention can be used to capture the ship model to reduce its speed. There is no need to use manpower to counteract the inertia of the ship model. At the same time, during the experiment, the ship model capture device is separated from the ship model and will not affect the experimental data. In addition, the damper allows the rotating sleeve rod to rotate upward within a certain range, so the collar will follow the movement of the fixed rod of the ship model, and the fixed rod will be held within the collar. Description of the Drawings
[0015] Figure 1 Figure 6 is a schematic structural diagram of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention installed on a trailer.
[0016] Figure 2 Figure 7 is a schematic structural diagram of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention in the left view direction installed on a trailer.
[0017] Figure 3 Figure 8 is a schematic structural diagram of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention.
[0018] Figure 4 Figure 9 is a schematic structural diagram of a spring damper of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention after the first housing is cut open.
[0019] Figure 5 Figure 10 is an exploded structural diagram of a spring damper of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention.
[0020] Figure 11 is a schematic diagram of the state of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention when the ship model shakes.
[0021] Figure 7 Figure 12 is a schematic diagram of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention in a following state.
[0022] Figure 8 Figure 13 is a schematic diagram of a ship model capture device for hydrodynamic self-propelled model tests according to an embodiment of the present invention in a retracted state.
[0023] Reference Numerals
[0024] 1 Ship model capturing device, 11 Rotating shaft, 12 Driving device, 13 Rotating sleeve rod member, 131 Collar, 132 Hollow 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 model, 21 Fixed rod;
[0026] 3 Trailer;
[0027] 4 Cable;
[0028] 5 Horizontal plane. Specific implementation manner
[0029] The present invention provides a ship model capturing device 1 for a hydrodynamic self-propelled model test. As shown in Figure 1 and Figure 2 , the ship model capturing device 1 is installed on the trailer 3. As shown in Figure 1 and Figure 2 , it shows a partial view of the trailer 3. In this embodiment, two ship model capturing devices 1 are provided at positions near the bottom on the side of the trailer 3, respectively used to capture the fixed rods 21 near the head and tail ends of the ship model 2. When the ship model 2 is in a horizontal state, the fixed rods 21 of the ship model 2 extend vertically upward from the ship model 2. The cable 4 for collecting data of the ship model 2 is connected to the trailer 3. As shown in Figure 3 , 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 rod member 13 fixed to one side of the circumferential outer wall of the rotating shaft 11 and rotating synchronously with the rotating shaft 11. Among them, in this embodiment, the driving device 12 includes a motor and a reducer. The output shaft of the reducer is the output shaft of the driving device 12. One end of the damper 14 is connected to rotate synchronously with the output shaft, and the other end is connected to rotate synchronously with the rotating shaft 11. The rotating sleeve rod member 13 is provided with a collar 131, and the collar 131 can be sleeved on the outer circumference of the fixed rod 21 of the ship model 2.
[0030] When it is necessary to capture the model ship 2, the driving device 12 is manipulated to rotate the rotating sleeve rod member 13, so that the collar 131 is sleeved outside the fixed rod 21 of the model ship 2, so that the model ship 2 and the tugboat can reach the same speed in a very short time. Before the experiment starts, since the acceleration of the model ship 2 itself is small, the model ship 2 can be quickly accelerated by the trailer 3. After the experiment is completed, the model ship capture device 1 of the present invention can be used to capture the model ship 2 to slow it down. There is no need to resist the inertia of the model ship 2 by manpower. At the same time, during the experiment, the model ship capture device 1 is separated from the model ship 2 and will not affect the experimental data. When the model ship capture device 1 captures the model ship 2, the motor stops at an angle, one end of the damper 14 stops rotating accordingly, and the model ship 2 will roll, pitch, sway, heave, etc. under the action of waves, as Figure 2 shown in FIG. 6. In Figure 2 , the model ship 2 rolls to the right, its left side rises, and the damper 14 allows the rotating sleeve rod member 13 to rotate upward within a certain range, so the collar 131 will follow the fixed rod 21 of the model ship 2 and keep the fixed rod 21 within the collar 131. In Figure 6a , the model ship 2 rolls to the left, its left side descends, and the damper 14 allows the rotating sleeve rod member 13 to also rotate downward to lower the collar 131. In Figure 6b , the model ship 2 undergoes longitudinal rocking, the front end of the model ship 2 rises while the tail end descends, the damper 14 of the model ship capture device 1 at the front end allows the rotating sleeve rod member 13 connected thereto to rise, and at the same time the damper 14 of the model ship capture device 1 at the rear end allows the rotating sleeve rod member 13 connected thereto to descend. In these states, the collar 131 always follows the root of the fixed rod 21 to prevent the fixed rod 21 from detaching.
[0031] As Figure 4 and Figure 5 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 rotating 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 in the cavity to divide the cavity into two first damping cavities 145 and second damping cavities 146 extending circumferentially. 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 damping objects that can be compressed and extended. The damping objects are telescopic springs 147, 148 extending along the first damping cavity 145 or the second damping cavity 146. When the rotating sleeve rod member rotates downward, that is, Figure 4 and Figure 5During the clockwise rotation, the first spring 147 below (on the right side) is compressed, while the second spring 148 above (on the left side) stretches. When the rotating sleeve rod member rotates upward, the second spring 148 above is compressed, while the first spring 147 below stretches.
[0032] As Figure 3 shown, a counterweight 16 is provided on the outer side of the rotating shaft 11 on the side opposite to the rotating sleeve rod member 13. When the rotating sleeve rod member 13 rotates downward to the in-place position but the collar 131 does not engage with the fixed rod 21, it is necessary to rotate the rotating sleeve rod in the reverse direction to the original position. At this time, the counterweight 16 can balance the gravity of the rotating sleeve rod member 13, enabling the motor to start the rotation of the rotating sleeve rod member 13 with a relatively small power, and at the same time enabling the rotating sleeve rod member 13 to rotate upward faster. In this embodiment, the counterweight 16 is in a long strip shape and extends from one end of the rotating shaft 11 to the other end of the rotating shaft 11.
[0033] In this embodiment, the rotating shaft 11 includes cylindrical segments at both ends and a long strip segment between the two cylindrical ends. The cylindrical segments and the long strip segment are integrated. Two bearings 17 are respectively installed on the two cylindrical segments. The rotating sleeve rod member 13 and the counterweight 16 are fixed to the long strip segment, and it is easier and more stable to be fixed to the long strip segment.
[0034] The rotating sleeve rod member 13 is in the shape of a triangular plate. One side of the triangular plate of the rotating sleeve rod member 13 is fixed to the rotating shaft 11, and a groove penetrating both sides of the triangular plate is provided at the corner opposite to this side. The collar 131 is fixedly embedded in the groove. The triangular plate can provide a stable structure and sufficient strength. Reinforcing plates 133 perpendicular to the triangular plate are provided along its three sides, and reinforcing ribs 134 are also provided between the reinforcing plates. In addition, a plurality of hollow openings 132 are provided on the triangular plate, which can reduce the resistance generated by water. The collar 131 is made of carbon fiber reinforced nylon, has very high strength, can withstand the huge inertial impact generated when the model ship 2 is forced to decelerate, and in addition, has the characteristics of light weight and good wear resistance, and will not cause too much damage to the wooden model ship itself when the sleeve rod rotates.
[0035] The model ship capturing device 1 includes a following state and an acceleration / deceleration state. As Figure 7 shown, in the following state, the rotating sleeve rod member 13 points upward, and the collar 131 is disengaged from the fixed rod 21 of the model ship 2. In the acceleration / deceleration or capturing state, as shown in FIG. 6, the collar 131 is sleeved outside the fixed rod 21 of the model ship 2. The model ship capturing device 1 further includes a retracted state. As Figure 8 shown, in the retracted state, the rotating sleeve rod member 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 provided on the trailer 3. By operating the controller, the motor can drive the rotating shaft 11 to rotate different angles, so that the rotating sleeve rod 13 is located at different positions and in different states.
[0037] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art make various modifications or equivalent replacements within the essence and protection scope of the present invention, which also fall within the protection scope of the present invention.
Claims
1. A ship model capturing device for hydrodynamic self-propelled model tests, characterized in that, Installed on a trailer, it includes a rotating shaft, a driving device, a damper installed between the output shaft of the driving device and the rotating shaft, and a rotating sleeve rod fixed to the outer circumferential wall of one side of the rotating shaft and rotating synchronously with the rotating shaft. One end of the damper is connected to the output shaft to rotate synchronously, and the other end is connected to the rotating shaft to rotate synchronously. The rotating sleeve rod is provided with a collar, and the collar can be sleeved on the outer circumference of the fixed rod of the ship model.
2. The ship model capturing device according to claim 1, wherein The damper includes a first housing fixed to the output shaft and a second housing fixed to the rotating shaft. An annular cavity is formed between the first housing and the second housing. A first partition block and a second partition block are provided in the cavity 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 damping objects that can be compressed and extended.
3. The ship model capturing device according to claim 2, characterized in that, The damping object is a telescopic spring extending along the first damping cavity or the second damping cavity.
4. The ship model capturing device according to claim 1, wherein, The rotating shaft includes cylindrical sections at both ends and a long strip section between the two cylindrical ends.
5. The ship model capturing device according to claim 1, characterized in that, The rotating sleeve rod is in the shape of a triangular plate. One side of the triangular plate is fixed to the rotating shaft, and a groove penetrating both sides of the triangular plate is opened at the corner opposite to this side. The collar is fixedly embedded in the groove.
6. The ship model capturing device according to claim 5, characterized in that, The collar is made of carbon fiber reinforced nylon material.
7. The ship model capturing device according to claim 1, characterized in that, The ship model capturing device includes a following state and a capturing state. In the following state, the rotating sleeve rod points upward, and the collar is separated from the fixed rod of the ship model. In the capturing state, the collar is sleeved outside the fixed rod of the ship model.
8. The ship model capturing device according to claim 7, characterized in that, The ship model capturing device further includes a retracted state. In the retracted state, the rotating sleeve rod rotates below the bottom of the trailer and is parallel to the bottom of the trailer.