Aerial cableway scaling experiment device

Abstract

The invention relates to the technical field of aerial cableway scaling experiments, and discloses an aerial cableway scaling experiment device, which comprises two rolling assemblies arranged at an interval, a force measuring assembly, a tension cable and a constant force mechanism, and is characterized in that each rolling assembly comprises a fixed seat, a calibration table rotationally connected with the fixed seat, a driving piece connected with the fixed seat and the calibration table, and a bracket connected with the calibration table; the driving part is used for driving the calibration table to swing relative to the fixing seat; the force measuring assembly is connected with a bracket and / or a calibration table of a rolling assembly; one end of the tension cable is connected with the force measuring assembly, and the other end bypasses the bracket of the other rolling assembly; the constant force mechanism is connected with the other end of the tension cable and used for applying constant torque to the tension cable. The driving piece drives the calibration table and the support to swing, rolling of ships is simulated through swing of the calibration table and the support, and the coupling effect of rolling motion of the two ships can be accurately simulated.

Description

Technical Field

[0001] This invention relates to the field of scaled-down experimental technology for elevated cableways, and specifically to a scaled-down experimental apparatus for elevated cableways. Background Technology

[0002] When replenishing supplies between ships at sea, an elevated cableway system is often used to transport supplies from the supply ship to the receiving ship. Due to the complex sea conditions, the two ships experience six degrees of freedom motion, including rolling and pitching, under the action of waves. Rolling, in particular, significantly affects the tension fluctuation of the cables, thereby affecting the safety and stability of the supply transport. Rolling refers to the rotational oscillation motion of a ship submerged in water around its longest extension direction.

[0003] Traditional cable tension testing is mostly based on static loads or simplified motion models, which cannot simulate the rolling motion of two ships and cannot accurately simulate the coupling effect of the rolling motion of two ships. This results in a large deviation between the tension calibration results and the actual working conditions, affecting the design optimization and safety assessment of the supply system.

[0004] Therefore, there is an urgent need for a dynamic testing device that can simulate the coupling relationship of the roll motion of two ships under different sea conditions indoors, so as to achieve accurate measurement and calibration of cable tension and provide more reliable data support for the design of the supply system. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a scaled-down experimental device for elevated cableways, which solves the technical problem that the existing technology cannot simulate the rolling motion of two ships and cannot accurately simulate the coupling effect of the rolling motion of two ships.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides a scaled-down experimental apparatus for elevated cableways, comprising: Two spaced-apart roll assemblies, each roll assembly including a fixed base, a calibration platform rotatably connected to the fixed base, a drive unit connecting the fixed base and the calibration platform, and a bracket connecting the calibration platform, wherein the drive unit is used to drive the calibration platform to swing relative to the fixed base. A force measuring component, connected to a bracket of the aforementioned roll component and / or the calibration platform; Tension cable, one end of which is connected to the force measuring component, and the other end which passes over a bracket of another of the yaw components; and A constant force mechanism, connected to the other end of the tension cable, is used to apply a constant torque to the tension cable.

[0007] In one embodiment, the roll assembly further includes a roll shaft rotatably connected to the fixed base; The calibration platform is connected to the rocker arm and is rotatably connected to the fixed base via the rocker arm.

[0008] In one embodiment, the drive unit includes a transmission plate, a cam, and a drive section. The transmission plate is connected to the calibration stage and extends radially along the roll axis. The drive section is connected to the fixed base, and the output shaft of the drive section is connected to and via the cam to the transmission plate for driving the transmission plate to swing via the cam.

[0009] In one embodiment, the roll assembly further includes an encoder connected to the roll shaft and the drive unit for detecting the rotation angle and speed of the roll shaft.

[0010] In one embodiment, the constant force mechanism includes a winding wheel, a magnetic damper, and a drive motor. The winding wheel is connected to the other end of the tension cable. The drive motor is fixed to the calibration platform and is sequentially connected to the magnetic damper and the winding wheel. The drive motor can rotate forward or reverse to drive the winding wheel to release or wind the winding wheel. The magnetic damper can adjust the magnitude of the transmitted torque by adjusting the applied current.

[0011] In one embodiment, the scaled-down experimental device for the elevated cableway also includes a base, on which two of the sway components are spaced apart.

[0012] In one embodiment, a groove is formed on one side of the base; The fixed seat of the rocking assembly is slidably disposed in the slide groove; The elevated cableway scale-down experimental device also includes a linear drive component, which connects the base and the fixed seat and is used to drive the fixed seat to slide relative to the base.

[0013] In one embodiment, the sway assembly further includes a plurality of pulleys, each of which is rotatably connected to the bracket, and at least some of the pulleys are spaced apart along the height direction; the tension cable passes over at least some of the pulleys.

[0014] In one embodiment, the force measuring assembly includes a plurality of force measuring elements, which are spaced apart along the height and horizontal directions, and the force measuring elements are detachably connected to one end of the tension cable.

[0015] In one embodiment, at least some of the pulleys are adjustable in position along the height direction and can be maintained at the adjusted height.

[0016] Compared with existing technologies, the scaled-down experimental device for elevated cableways provided by this invention, when simulating an elevated cableway system, activates the drive unit, which drives the calibration platform and support to swing. The swing of the calibration platform and support simulates the rolling motion of a ship. Since both the calibration platform and support in the two rolling components can swing to simulate the rolling motion of a ship, and the two rolling components are connected by a tension cable, the coupling effect of the rolling motion of two ships can be accurately simulated. By adjusting the driving speed of the drive unit, the swing frequency of the calibration platform and support can be changed. By setting up a force measuring component and a constant force mechanism, the constant force mechanism can apply a constant torque to the tension cable. The tension cable can then be wound up and unwound according to the magnitude of the torque to provide constant tension. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a scaled-down experimental device for elevated cableways provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a scaled-down experimental device for elevated cableways provided in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle; Figure 4 yes Figure 2 A magnified view of a portion of point B in the middle; Figure 5 This is a schematic diagram of the structure of a scaled-down experimental device for elevated cableways provided in an embodiment of the present invention; Figure 6 yes Figure 5 A magnified view of a portion of point C in the middle; Figure 7 This is a schematic diagram of the structure of a scaled-down experimental device for elevated cableways provided in an embodiment of the present invention, with the transmission plate hidden. Figure 8 yes Figure 7 A magnified view of a portion of point D.

[0018] Explanation of reference numerals in the attached figures: Roll assembly 1; fixed base 11; calibration table 12; drive component 13; transmission plate 131; strip groove 131a; cam 132; threaded hole 132a; drive unit 133; fixed shaft 134; bracket 14; roll shaft 15; encoder 16; pulley 17; linear drive component 18; Force measuring assembly 2; force measuring component 21; fixing block 211; force sensor 212; guide roller 213; Tension cable 3; 4. Constant force mechanism; 41. Winding wheel; 42. Magnetic damper; 43. Drive motor; Base 5; Slide 5a. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problem of being unable to simulate the rolling motion of two ships and accurately simulate the coupling effect of their rolling motions, this invention provides a scaled-down experimental device for elevated cableways. This device can simulate the rolling motion of two ships and accurately simulate the coupling effect of their rolling motions.

[0021] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a scaled-down experimental device for an elevated cableway according to an embodiment of the present invention. The scaled-down experimental device for an elevated cableway includes two spaced-apart swaying components 1, a force measuring component 2, a tension cable 3, and a constant force mechanism 4. The swaying component 1 includes a fixed base 11, a calibration platform 12 rotatably connected to the fixed base 11, a driving component 13 connecting the fixed base 11 and the calibration platform 12, and a support 14 connecting the calibration platform 12. The driving component 13 is used to drive the calibration platform 12 to swing relative to the fixed base 11. The force measuring component 2 is connected to the support 14 of one swaying component 1 and / or the calibration platform 12. One end of the tension cable 3 is connected to the force measuring component 2, and the other end passes around the support 14 of the other swaying component 1. The constant force mechanism 4 is connected to the other end of the tension cable 3 and is used to apply a constant torque to the tension cable 3.

[0022] Specifically, when simulating the elevated cableway system, the drive unit 13 is activated, which drives the calibration platform 12 and the support 14 to swing. The swing of the calibration platform 12 and the support 14 simulates the rolling motion of a ship. Since both the calibration platform 12 and the support 14 in the two rolling components 1 can swing to simulate the rolling motion of a ship, and the two rolling components 1 are connected by the tension cable 3, the coupling effect of the rolling motion of the two ships can be accurately simulated. By adjusting the driving speed of the drive unit 13, the swing frequency of the calibration platform 12 and the support 14 can be changed. By setting up the force measuring component and the constant force mechanism 4, the constant force mechanism 4 can apply a constant torque to the tension cable 3. The tension cable 3 realizes the winding and unwinding according to the magnitude of the torque to provide constant tension.

[0023] In order to achieve the rotation of the calibration stage 12 relative to the fixed base 11, the calibration stage 12 can be rotatably connected to the fixed base 11 through a rotating shaft, a rotating pin, and a rotating column. Specifically, in one embodiment, the roll assembly 1 further includes a roll shaft 15, which is rotatably connected to the fixed base 11; the calibration stage 12 is connected to the roll shaft 15 and is rotatably connected to the fixed base 11 via the roll shaft 15.

[0024] In this embodiment, by setting a rocker arm 15, the calibration platform 12 is rotatably connected to the fixed base 11 via the rocker arm 15.

[0025] To drive the calibration platform 12 to swing relative to the fixed base 11, the driving component 13 can be a motor-driven crank-connecting rod mechanism, a motor-driven swing guide rod mechanism, etc., specifically, such as... Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, the drive unit 13 includes a transmission plate 131, a cam 132 and a drive unit 133. The transmission plate 131 is connected to the calibration stage 12 and extends radially along the rocker axis 15. The drive unit 133 is connected to the fixed base 11. The output shaft of the drive unit 133 is connected to the cam 132 and connected to the transmission plate 131 via the cam 132, for driving the transmission plate 131 to swing via the cam 132.

[0026] In this embodiment, the driving unit 133 drives the cam 132 to rotate. The rotating cam 132 abuts against the transmission plate 131, pushing the transmission plate 131 to rotate back and forth. The cam 132 and the transmission plate 131 can also be connected in other ways.

[0027] like Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, the transmission plate 131 has a strip groove 131a in the radial direction along the rocker shaft 15, and the drive member 13 also includes a fixed shaft 134. One end of the fixed shaft 134 is slidably disposed in the strip groove 131a, and the other end is connected to the cam 132. The connection between the fixed shaft 134 and the cam 132 is offset from the center of the cam 132.

[0028] When the cam 132 rotates, it drives the eccentric fixed shaft 134 to rotate. The rotating fixed shaft 134 pushes the transmission plate 131 to swing, so that the rotating cam 132 can push the transmission plate 131 and the calibration platform 12 to swing via the fixed shaft 134.

[0029] In order to adjust the swing amplitude of the transmission plate 131, for this reason, as follows: Figure 8 As shown, in one embodiment, the cam 132 has a plurality of threaded holes 132a, which are spaced apart along the direction perpendicular to the rotation axis of the cam 132. The other end of the fixed shaft 134 has an external thread and is threadedly connected to the threaded holes 132a.

[0030] By connecting the fixed shaft 134 to different threaded holes 132a, the distance between the fixed shaft 134 and the rotation center of the cam 132 can be adjusted. By adjusting this distance, the amplitude of the transmission plate 131 can be adjusted.

[0031] In order to detect the swing angle and rotation speed of the rocker arm 15, for this purpose, such as Figure 6 As shown, in one embodiment, the roll assembly 1 further includes an encoder 16, which is connected to the roll shaft 15 and the drive unit 133, and is used to detect the rotation angle and speed of the roll shaft 15.

[0032] In this embodiment, by setting an encoder 16, the encoder 16 can measure the swing angle and swing speed of the roll shaft 15. At the same time, by electrically connecting the encoder 16 with the drive unit 133, the motor speed can be determined, and the frequency of the roll can be controlled by controlling the motor speed.

[0033] It should be understood that the constant force mechanism 4 can be a spring-type constant force mechanism 4, specifically, such as... Figure 2 and Figure 4 As shown, in one embodiment, the constant force mechanism 4 includes a winding wheel 41, a magnetic damper 42, and a drive motor 43. The winding wheel 41 is connected to the other end of the tension cable 3. The drive motor 43 is fixed to the calibration platform 12 and is connected in sequence to the magnetic damper 42 and the winding wheel 41. The drive motor 43 can rotate forward or reverse to drive the winding wheel 41 to release or wind the winding wheel 41. The magnetic damper 42 can adjust the magnitude of the transmitted torque by adjusting the applied current.

[0034] In this embodiment, by providing a constant current to the magnetic damper 42, the drive motor 43 drives the magnetic damper 42 to rotate, and the magnetic damper 42 provides a constant torque to the winding wheel 41. The winding wheel 41 realizes the winding and unwinding function according to the tension at both ends of the rigging, thereby providing constant tension.

[0035] In order to adjust the tension of the winding wheel 41, in one embodiment, the winding wheel 41 is detachably connected to the output end of the magnetic damper 42 by a thread. There are multiple winding wheels 41 with different diameters. Under constant current, the tension applied to the tension cable 3 by the winding wheel 41 can be adjusted by replacing the winding wheel 41 with one of different diameters.

[0036] To achieve a fixed interval between the two roll components 1, therefore, as follows: Figure 2 , Figure 5 and Figure 7 As shown, in one embodiment, the elevated cableway scale-down experimental device further includes a base 5, with two of the sway components 1 spaced apart on the base 5.

[0037] In this embodiment, by fixing the two rocking components 1 to the same base 5, the experimental device can be moved as a whole by moving the same base 5. Moreover, the external interference received by the components connected to the same base 5 is the same, thus avoiding the impact of different interference sources on the accuracy of the experiment.

[0038] To simulate the changes in distance between the two ship hulls and the impact of rolling on the elevated cableway system under actual sea conditions, therefore, as follows: Figure 2 and Figure 4 As shown, in one embodiment, a groove 5a is formed on one side of the base 5; a fixed seat 11 of a rocking assembly 1 is slidably disposed in the groove 5a; the elevated cableway scale-down experimental device also includes a linear drive 18, which connects the base 5 and the fixed seat 11 and is used to drive the fixed seat 11 to slide relative to the base 5. It should be understood that both rocking assemblies 1 can also be fixed to the fixed seat 11.

[0039] In this embodiment, the roll assembly 1 drives the calibration platform 12 and the machine support 14 to simulate the roll of the ship. The roll assembly 1 is further driven to slide by the linear drive component 18 to simulate the dynamic change of the ship distance. The ship distance / roll dual-variable experimental system is integrated to realize the simulation of ship collision early warning.

[0040] Because the different heights of the supports 14 in the two sway components 1 during the material transport process of the simulated elevated cableway system will cause the tension cable 3 to be at different heights on the supports 14, the resulting angle will affect the sliding of the tension cable 3 relative to the supports 14 and the accuracy of the force measuring component 2. Therefore, as Figure 1 and Figure 4 As shown, in one embodiment, the sway assembly 1 further includes a plurality of pulleys 17, which are rotatably connected to the bracket 14, and at least some of the pulleys 17 are spaced apart along the height direction; the tension cable 3 passes around at least some of the pulleys 17.

[0041] In this embodiment, multiple pulleys 17 are provided, and all pulleys 17 are rotatably connected to the bracket 14. The tension cable 3 passes around the pulleys 17, allowing the brackets 14 of different heights to turn. This also reduces the sliding friction between the tension cable 3 and the bracket 14, preventing friction between the tension cable 3 and the bracket 14 from affecting the accuracy of the test data of the force measuring component 2.

[0042] It should be understood that the force measuring component 2 can be a force sensor, a tension sensor, etc. Specifically, in one embodiment, the force measuring component 2 includes a plurality of force measuring elements 21, which are distributed at intervals along the height direction and the horizontal direction, and the force measuring elements 21 are detachably connected to one end of the tension cable 3.

[0043] In this embodiment, by setting multiple force measuring elements 21, which are distributed at intervals along the height and horizontal directions, and the force measuring elements 21 are detachably connected to one end of the tension cable 3, one end of the tension cable 3 can be connected to different force measuring elements 21 as needed, which can simulate the influence of different fixed positions of the tension cable 3 on the roll test and realize data measurement of different fixed positions of the tension cable 3.

[0044] It should be understood that the force measuring component 21 includes a fixed block 211, a force sensor 212, and two guide rollers 213. The fixed block 211 is connected to the bracket 14, the force sensor 212 is fixed to the fixed block 211, and the two guide rollers 213 are parallel to each other and spaced apart. One end of the tension cable 3 passes through the guide rollers 213 and is connected to the force sensor 212. The end of the tension cable 3 passing through the two guide rollers 213 is coaxial with the force measuring direction of the force sensor 212.

[0045] One end of the tension cable 3 passes through two guide rollers 213. The two guide rollers 213 can limit the position of the tension cable 3, preventing the direction of the force applied by the tension cable 3 to the force sensor 212 from changing. Moreover, the end of the tension cable 3 connected to the force sensor 212 can be set to be coaxial with the force measuring direction of the force sensor 212, so as to avoid the deviation between the force applied by the tension cable 3 and the force measuring direction of the force sensor 212 affecting the accuracy of the force measurement.

[0046] It should be understood that one end of the tension cable 3 can be detachably connected to the force sensor 212 via bolts, screws, and clips.

[0047] It should be understood that, in order to adjust the height of the tension cable 3 as it passes over the support 14 to simulate the height changes of different vessels during cableway transport, in one embodiment, at least some of the pulleys 17 are adjustable in the height direction and can be maintained at the adjusted height.

[0048] In this embodiment, by adjusting the height of pulley 17, the height of tension cable 3 when it passes over support 14 can be adjusted, which can simulate the height changes of different ships during cableway transport. At the same time, by combining the adjustment of roll and the distance between the two ships, the elevated cableway transport of ships can be simulated from multiple dimensions.

[0049] It should be understood that a strip-shaped groove can be opened along the height direction of the bracket 14, and a T-shaped lead screw can be connected to the bracket 14 for transmission. The connecting shaft of the pulley 17 can slide through the strip-shaped groove and be threadedly connected to the T-shaped lead screw. By rotating the T-shaped lead screw, the position of the pulley 17 along the height direction of the bracket 14 can be adjusted. Specifically, in one embodiment, multiple fixing holes can be opened in the height direction of the bracket 14. By passing the connecting shaft of the pulley 17 through different fixing holes, the position of the pulley 17 relative to the bracket 14 can be adjusted.

[0050] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A scaled-down experimental device for elevated cableways, characterized in that, include: Two spaced-apart roll assemblies, each roll assembly including a fixed base, a calibration platform rotatably connected to the fixed base, a drive unit connecting the fixed base and the calibration platform, and a bracket connecting the calibration platform, wherein the drive unit is used to drive the calibration platform to swing relative to the fixed base. A force measuring component, connected to a bracket of the aforementioned roll component and / or the calibration platform; A tension cable, one end of which is connected to the force measuring component and the other end of which passes over the support of another of the yaw components; and A constant force mechanism, connected to the other end of the tension cable, is used to apply a constant torque to the tension cable.

2. The scaled-down experimental apparatus for elevated cableways according to claim 1, characterized in that, The roll assembly also includes a roll shaft, which is rotatably connected to the fixed base; The calibration platform is connected to the rocker arm and is rotatably connected to the fixed base via the rocker arm.

3. The scaled-down experimental apparatus for elevated cableways according to claim 2, characterized in that, The driving component includes a transmission plate, a cam, and a driving part. The transmission plate is connected to the calibration stage and extends radially along the roll axis. The driving part is connected to the fixed base, and the output shaft of the driving part is connected to the cam and connected to the transmission plate via the cam, for driving the transmission plate to swing via the cam.

4. The scaled-down experimental apparatus for elevated cableways according to claim 3, characterized in that, The roll assembly also includes an encoder, which is connected to the roll shaft and the drive unit, and is used to detect the rotation angle and speed of the roll shaft.

5. The scaled-down experimental apparatus for elevated cableways according to claim 1, characterized in that, The constant force mechanism includes a winding wheel, a magnetic damper, and a drive motor. The winding wheel is connected to the other end of the tension cable. The drive motor is fixed to the calibration platform and is sequentially connected to the magnetic damper and the winding wheel. The drive motor can rotate forward or reverse to drive the winding wheel to release or wind the winding wheel. The magnetic damper can adjust the magnitude of the transmitted torque by adjusting the applied current.

6. The scaled-down experimental apparatus for elevated cableways according to claim 1, characterized in that, It also includes a base, on which two of the rocking components are spaced apart.

7. The scaled-down experimental apparatus for elevated cableways according to claim 6, characterized in that, A groove is formed on one side of the base; The fixed seat of the rocking assembly is slidably disposed in the slide groove; The elevated cableway scale-down experimental device also includes a linear drive component, which connects the base and the fixed seat and is used to drive the fixed seat to slide relative to the base.

8. The scaled-down experimental apparatus for elevated cableways according to claim 1, characterized in that, The sway assembly also includes a plurality of pulleys, each of which is rotatably connected to the bracket, and at least some of the pulleys are spaced apart along the height direction, with the tension cable passing over at least some of the pulleys.

9. The scaled-down experimental apparatus for elevated cableways according to claim 8, characterized in that, The force measuring assembly includes multiple force measuring elements, which are spaced apart along the height and horizontal directions, and each force measuring element is detachably connected to one end of the tension cable.

10. The scaled-down experimental apparatus for elevated cableways according to claim 8, characterized in that, At least some of the pulleys are adjustable in position along the height direction and can be maintained at the adjusted height.

Images