Gear drive rotation amplification type sway reducing device

Abstract

The application provides a gear transmission rotation amplification type sway reducing device, and belongs to the technical field of major lifeline engineering. The gear transmission rotation amplification type sway reducing device is arranged inside and above a tank body of an LNG storage tank, and comprises a combined disc, a wheel set, an outer sleeve, an outward extending fan blade, a ball screw, a spring and a sway plate. The upper combined disc is connected with the sway plate below through the spring, is fixed on the inner wall surface of the tank body of the LNG storage tank, and the sway plate is attached to the inner wall surface of the tank body of the LNG storage tank without being fixed. The wheel set, the outer sleeve, the outward extending fan blade and the ball screw are arranged between the combined disc and the sway plate, and are all below the liquid level inside the LNG storage tank. When an earthquake occurs, the sway reducing device utilizes the rotation amplification effect to perform efficient energy consumption, reduces the influence of the earthquake on the large LNG storage tank structure, and improves the safety of the large LNG storage tank structure.

Description

Technical Field

[0001] This invention belongs to the field of critical lifeline engineering technology, and relates to a sway reduction device for LNG storage tanks, and more particularly to a gear-driven rotation amplification sway reduction device. Background Technology

[0002] LNG is natural gas that has been compressed and cooled to -162°C, making it a cleaner and more efficient green energy source compared to traditional coal and oil. LNG storage tanks are a crucial component of urban lifeline engineering, and their ability to withstand natural disasters such as earthquakes is a key performance indicator. Under earthquake stress, storage tanks can malfunction, leading to fires or explosions, endangering people and property in the surrounding area, and causing severe economic losses.

[0003] Under seismic loads, the liquid inside LNG storage tanks sloshes, creating additional hydrodynamic pressure on the tank walls and affecting the structural safety of the tank. The sloshing liquid can also directly impact the ceiling, causing damage to pipe joints and accessories. To reduce the seismic response of LNG storage tanks, base isolation is employed. Studies have shown that isolation systems can effectively reduce the seismic response of the tank structure; however, isolation may increase the height of the sloshing waves, exacerbating the sloshing. Therefore, to ensure the safety of the tank structure, a device that can effectively reduce the height of the sloshing waves needs to be designed to address these practical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a sloshing reduction device that can effectively reduce the height of liquid surface sloshing waves in large LNG storage tanks, thereby reducing the amplitude of liquid sloshing and thus mitigating the impact of liquid surface sloshing caused by earthquakes on the tank structure.

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

[0006] A gear-driven, amplified sway-reducing device is installed inside and above the body of an LNG storage tank. The large LNG storage tank sway-reducing device includes: a combined disc 1, a wheel assembly 2, an outer sleeve 3, an extended fan blade 4, a ball screw 5, a spring 6, and a swaying plate 7. The combined disc 1, located above, is connected to the swaying plate 7 below it via the spring 6. The combined disc 1 is fixed above the inner wall of the LNG storage tank. The swaying plate 7 is attached to but not fixed to the inner wall of the LNG storage tank. The wheel assembly 2, outer sleeve 3, extended fan blade 4, and ball screw 5 are arranged between the combined disc 1 and the swaying plate 7. Except for the combined disc 1 and the spring 6, all other components are located below the liquid level inside the LNG storage tank.

[0007] The combined disc 1 includes three sealed hollow discs of different radii: a large, a medium, and a small disc; a large annular magnet 13; a small annular magnet 15; a disc spring 16; and a rubber ring 11. The three sealed hollow discs are respectively a large sealed disc 12, a medium sealed disc 14, and a small sealed disc 17. Initially, they are concentric, but become non-concentric during shaking. The rubber ring 11 is fixed to the outer ring of the large sealed disc 12. The large annular magnet 13 is installed on the inner ring of the large sealed disc 12. The small annular magnet 15 is installed on the inner side of the medium sealed disc 14. Several solid small balls 18 are placed inside the small sealed disc 17. A small, sealed disc 17 is installed inside a medium, sealed disc 14, and the two are connected by a disc spring 16. The medium, sealed disc 14 is installed inside a large, sealed disc 12, forming a combined disc 1. Specifically, the outer diameter of the small, sealed disc 17 is smaller than the inner diameter of the medium, sealed disc 14. The disc spring 16 is installed in the gap after assembly. The outer diameter of the medium, sealed disc 14 matches the inner diameter of the large, sealed disc 12. The inner diameter of the rubber ring 11 is equal to the outer diameter of the large, sealed disc 12. The two are tightly fitted and fixed together. The combined disc 1 is fixed inside the LNG storage tank and positioned above the liquid surface.

[0008] The wheel assembly 2 is located below the combined disc 1 and includes two identical discs. Each disc has a circular structure with six fan blades 21 evenly installed along its circumference at 60° intervals. Inside each disc, partitions 22 are installed at equal intervals, and several small balls 23 are placed on them. The surfaces of the two discs face each other and are fixed to both ends of the central crossbar 106. A second gear 105 is provided on the central crossbar 106, and the central crossbar 106 is connected to a vertical fixing rod 101. The vertical fixing rod 101 connects to the central crossbar 106 without affecting its rotation; that is, both discs can rotate under force. The top end of the vertical fixing rod 101 is fixedly connected to the bottom surface of the combined disc 1, and the bottom end is connected to the bracket 42 of the extended fan blades 4. The middle section is bent and sleeved onto the central crossbar 106.

[0009] The outer sleeve 3 is a sealed cylinder. A ring magnet 31 is installed on the inner side of the cylinder wall. The interior is filled with damping fluid and equipped with four ball screws 5. A second rotating shaft 107 is fixedly installed at the center of the inner side of the top surface of the outer sleeve 3. An internal gear 35 is located at the lower end of the second rotating shaft 107. A first rotating shaft 104 is fixedly installed at the center of the outer side of the top surface of the outer sleeve 3. A first gear 102 is located at the upper end of the first rotating shaft 104. That is, the upper end of the first rotating shaft 104 is fixedly connected to the first gear 102, and the lower end is fixed at the center of the outer side of the top surface of the outer sleeve 3. The upper end of the second rotating shaft 107 is fixed at the center of the inner side of the top surface of the outer sleeve 3, and the lower end is fixedly connected to the internal gear 35. An external gear 33 is located on the outer top of the outer sleeve 3, and the external gear 33 meshes with the fan blade gear 45 of the extended fan blade 4. The bottom cover structure of the outer sleeve 3 is a composite sealed roller 32, which consists of a sealed large roller and four sealed small rollers. The composite sealed roller 32 has four round holes in the bearing area of ​​the sealed large roller, and a sealed small roller is installed in each round hole.

[0010] The ball screw 5 has a composite metal fan blade 103 mounted on its sleeve. The lower end of the ball screw 5's sleeve is fixed to the shaft ring of the small sealed roller of the composite sealed roller 32. The composite sealed roller 32 serves three purposes: first, it ensures the airtightness of the outer sleeve 3; second, when the outer sleeve 3 rotates, it does not affect the vertical movement of the ball screw 5's lever or the rotation of the sleeve; and third, it can bear the vertical load and transmit it through the outer sleeve 3 to the first rotating shaft 104. The first rotating shaft 104 and the bracket 42 are connected by an intermediate roller 43. The bracket 42 then transmits the vertical load to the lower surface of the combined disc 1, ensuring that the outer sleeve 3 and the ball screw 3's sleeve do not undergo vertical displacement. Each ball screw 5 is fixed with a top gear 34. All four top gears 34 are connected to the inner gear 35 at the center of the inner side of the top surface of the outer sleeve 3 through gear engagement. The bottom of the ball screw 5 extends out of the cylinder through the shaft ring of the small sealed roller on the composite sealed roller 32 and is vertically fixed to the swaying plate 7 below it.

[0011] The extended fan blades 4 include six sets of identical fan blade structures, an intermediate roller 43, and six identical supports 42. Each set of fan blade structures, from top to bottom, consists of an upper fan blade 41, a support roller 44, a fan blade gear 45, and a lower fan blade 46, mounted on a support rotation shaft 47. All six support rollers 44 are connected to the intermediate roller 43 via supports 42. Specifically, the six upper fan blades 41 are evenly arranged along the top outer ring of the outer sleeve 3, spaced at 60° intervals. The supports 42 are fixed below the combined disc 1 by vertical fixing rods 101. The two ends of the six supports 42 are respectively fixed to the intermediate roller 43 and the seat ring of the support roller 44. The support rotation shaft 47 is fixed to the shaft ring of the support roller 44, and the middle part of the first rotation shaft 104 is fixed to the shaft ring of the intermediate roller 43. In this way, the supports 42 can fix the positions of the support rotation shaft 47 and the first rotation shaft 104 without affecting the rotation of the upper fan blades 41 and the first rotation shaft 104. Furthermore, a first gear 102 is mounted on the top of the first rotating shaft 104. The first gear 102 is connected to the second gear 105 on the middle crossbar 106 via gear engagement. The bottom of the first rotating shaft 104 is fixed to the center of the outer side of the top surface of the outer sleeve 3, meaning that the rotation of the outer sleeve 3 will drive the wheel assembly 2 to rotate. The size of the bracket 42 is determined by the outer sleeve 3, and it should ensure that the fan blade gear 45 on the extended fan blade 4 and the external gear 33 on the upper outer side of the outer sleeve 3 achieve gear transmission, so that when the outer sleeve 3 rotates, it can simultaneously drive the upper fan blade 41 to rotate. In summary, the bracket 42 is fixed, thus preventing the intermediate roller 43 and the bracket roller 44 from vertically displacing. Consequently, the first rotating shaft 104 and the bracket rotating shaft 47, which are fixed on the seat rings of the intermediate roller 43 and the bracket roller 44, will not vertically displace. That is, the outer sleeve 3, which is fixed to the first rotating shaft 104, will not vertically displace. Therefore, the composite sealed roller 32, which serves as the bottom cover structure of the outer sleeve 3, and the sleeve of the ball screw 5, which is fixed on the shaft ring of the small sealed roller, will not vertically displace. The rotation of the outer sleeve 3 will not be transmitted to the upper fan blade 41 through the bracket 42. Instead, the rotation of the upper fan blade 41 and the lower fan blade 46 will be achieved through the connection and transmission between the external gear 33 on the outer side of the outer sleeve 3 and the fan blade gear 45 on the extended fan blade 4. Furthermore, the rotation of the outer sleeve 3 can simultaneously drive the wheel set 2 to rotate.

[0012] Furthermore, the large and small annular magnets 13 and 15 of the combined disk 1 are axially magnetized to ensure that the magnetic poles are the same at the same horizontal position, so that they generate a repulsive force when they are close to each other.

[0013] Furthermore, a rubber ring 11 is provided on the outer ring of the combined disc 1. Rubber has high damping properties. Even if the combined disc 1 is fixedly installed, in order to prevent the position of the combined disc 1 from becoming loose during normal operation of the anti-sway device, which would impact the tank wall and damage the tank structure, the rubber ring 11 is added to consume energy and reduce the threat of the anti-sway device to the safety of the tank.

[0014] Furthermore, lubricating oil is applied appropriately between the discs in the combined disc 1 to reduce friction. When the large sealed disc 12 moves, relative movement will occur between the inner sealed disc 14 and the large sealed disc 12, and between the inner sealed disc 14 and the small sealed disc 17.

[0015] Furthermore, the bracket 42 restricts the intermediate roller 43 and the bracket roller 44 from vertical displacement, so the first rotating shaft 104 fixed to the shaft ring and the bracket rotating shaft 47 will not move vertically, thereby ensuring that the lower part of the anti-sway device can transfer the vertical load to the combined disc 1.

[0016] Furthermore, the radius ratio between the top gear 34 fixed above the ball screw 5 and the inner gear 35 of the outer sleeve 3 is set to 2, thereby achieving rotational amplification and facilitating energy consumption.

[0017] Furthermore, a composite metal fan blade 103 is installed on the sleeve of the ball screw 5. When the fan blade rotates, the energy consumption is more efficient due to the presence of the magnetic field and the damping fluid.

[0018] Furthermore, the sway plate 7 is made of flexible material, which not only meets the deformation performance requirements of the anti-sway device, but also has a certain rigidity to withstand the dynamic water pressure and realize the transmission of force.

[0019] The process of using this invention is as follows:

[0020] During an earthquake, the combined disc 1 will sway along with the large LNG storage tank. The rubber ring 11 ensures the structural safety of the tank while also dissipating energy. Due to inertia, the sealed middle disc 14 will undergo relative displacement with the sealed large disc 12. Since the large ring magnet 13 and the small ring magnet 15 have the same magnetic poles at the same height, they will generate a repulsive force when they approach each other, further intensifying the relative motion between the sealed large disc 12 and the sealed middle disc 14. Driven by the sealed middle disc 14, the solid ball 18 inside the sealed small disc 17 begins to move, colliding and consuming energy. The disc spring 16 will also deform due to the relative displacement between the sealed middle disc 14 and the sealed small disc 17, absorbing energy and dissipating it.

[0021] Simultaneously, during the earthquake, the liquid inside the large LNG storage tank will also move horizontally. Due to the flexible nature of the liquid, the liquid surface will move up and down, causing the swaying plate 7 to oscillate up and down. Since the swaying plate 7 is fixed to the lower end of the ball screw 5 lever, it will drive the lever to move up and down. The up and down movement of the ball screw 5 lever will cause the sleeve of the ball screw 5 to rotate. Subsequently, the composite metal fan blade 103 on the sleeve will rotate in the magnetic field generated by the damping fluid and the annular magnet 31, generating damping force and consuming energy. At the same time, the top gear 34 fixed above the ball screw 5 will also rotate, further transmitting the rotation to the internal gear 35 fixed to the inner center of the top surface of the outer sleeve 3. The internal gear 35 transmits the rotation to the outer sleeve 3 through the second rotating shaft 107, thereby driving the outer sleeve 3 to rotate.

[0022] During the rotation of the outer sleeve 3, the outer sleeve 3 is connected to the outer gear 33 fixed on the outer ring and the fan blade gear 45 of the extended fan blade 4, which transmits the rotation to the upper fan blade 41 and the lower fan blade 46. The upper fan blade 41 and the lower fan blade 46 rotate and consume energy. At the same time, the outer sleeve 3 also transmits the rotation to the upper fixed first gear 102 through the first rotating shaft 104 fixed at the center of the outer side of its top surface, which in turn drives the rotation of the second gear 105 fixed on the middle crossbar 106. The rotation of the second gear 105 can drive the discs (i.e., wheel sets 2) fixed at both ends of the middle crossbar 106 to rotate. At this time, the fan blade 21 fixed outside the disc and the small ball 23 placed inside both have the ability to consume energy.

[0023] The anti-sloshing device of the present invention has strong energy consumption capacity, can reduce the impact of liquid surface sloshing caused by earthquakes on the tank structure, and has high safety.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1) During an earthquake, the combined disc in the anti-sway device for large LNG storage tanks provided by this invention will shake along with the large LNG storage tank. The sealed large disc and the middle disc, and the middle disc and the small disc will slide relative to each other. Due to the presence of the internal annular magnet and spring, the relative motion between the sealed middle disc and the sealed large disc and the sealed small disc will be aggravated, thereby improving the energy consumption efficiency of the internal ball and spring.

[0026] 2) Simultaneously, the liquid inside the tank will also slosh around. Due to the flexible nature of the liquid, the liquid surface will slosh up and down, causing the swaying plate to bounce up and down. This drives the lead screw lever fixed to the swaying plate, causing the ball screw sleeve to rotate. The composite metal fan blades on the sleeve rotate, and due to the presence of damping fluid and magnetic field, the rotation of the composite metal fan blades is more energy-efficient. The ball screw sleeve is connected to the outer sleeve through gear transmission of different radii, which has a rotational amplification effect and accelerates the rotation speed of the outer sleeve. The outer sleeve, the extended fan blades, and the wheel assembly also use gears of different radii for transmission, which also has a rotational amplification effect and improves energy consumption efficiency. When the wheel assembly rotates, in addition to the fan blades rotating in the liquid, the internal small balls can also collide and consume energy during rotation.

[0027] 3) Furthermore, the number of intermediate sections in this sway reduction device is limited only by its own size. Moreover, by adjusting the size of the intermediate sections and the gear radius ratio according to different actual conditions, the sway reduction device can operate normally under various conditions, improving its adaptability and achieving full energy dissipation. The sway reduction device of this invention utilizes its rotational amplification effect for efficient energy dissipation, reducing the impact of earthquakes on the structure of large LNG storage tanks and improving the safety of large LNG storage tank structures. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the anti-sway device for large LNG storage tanks according to the present invention.

[0029] Figure 2 This is a schematic diagram of the anti-sway device.

[0030] Figure 3(a) is a schematic diagram of the planar structure of the combined disk in this invention.

[0031] Figure 3(b) is a schematic diagram of the elevation structure of the combined disk in this invention.

[0032] Figure 4 This is a schematic diagram of the structure of the rubber ring in this invention.

[0033] Figure 5 This is a schematic diagram of the wheel disc structure of the wheel assembly.

[0034] Figure 6 This is a schematic diagram of the outer sleeve structure.

[0035] Figure 7 This is a schematic diagram illustrating the structural principle of a composite sealed roller.

[0036] Figure 8 This is a cross-sectional view of the gear inside the outer sleeve.

[0037] Figure 9 This is a schematic diagram of the extended fan blades.

[0038] Figure 10 This is a top view of the outward-extending fan blades.

[0039] In the diagram: 1. Combined disc, 2. Wheel set, 3. Outer sleeve, 4. Extended fan blade, 5. Ball screw, 6. Spring, 7. Swing plate;

[0040] 11 Rubber ring; 12 Sealed large disc; 13 Large ring magnet; 14 Sealed middle disc; 15 Small ring magnet; 16 Disc spring; 17 Sealed small disc; 18 Solid ball; 101 Vertical fixing rod; 102 First gear; 103 Composite metal fan blade; 104 First rotating shaft; 105 Second gear; 106 Central crossbar; 107 Second rotating shaft;

[0041] 21. Fan blades; 22. Baffles; 23. Small balls;

[0042] 31 Ring magnet; 32 Composite sealing roller; 33 External gear; 34 Top gear; 35 Internal gear;

[0043] 41 Upper fan blade; 42 Support; 43 Intermediate roller; 44 Support roller; 45 Fan blade gear; 46 Lower fan blade; 47 Support rotating shaft. Detailed Implementation

[0044] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0045] Example

[0046] This embodiment provides a large LNG storage tank anti-sway device, including a combined disc 1, a wheel assembly 2, an outer sleeve 3, an extended fan blade 4, a ball screw 5, a spring 6, and a swaying plate 7.

[0047] like Figure 1 , 2 As shown in Figures 8, 9, and 10, the combined disc 1 is fixed to the inner wall of the large LNG storage tank and positioned above the liquid surface. The two discs of the wheel assembly 2 are opposite each other and are fixedly connected by a central crossbar 106. The second gear 105 is fixed to the central crossbar 106. The vertical fixing rod 101 is connected to the central crossbar 106 to fix the wheel assembly 2 below the combined disc 1. A first rotating shaft 104 is fixedly installed at the center of the outer side of the top surface of the outer sleeve 3. The first gear 102 fixed at the upper end of the first rotating shaft 104 engages with the second gear 105 to transmit the rotation of the outer sleeve 3 to the wheel assembly 2.

[0048] The extended fan blade 4 includes an upper fan blade 41, a support 42, an intermediate roller 43, a support roller 44, a fan blade gear 45, a lower fan blade 46, and a support rotating shaft 47. The extended fan blade 4 has six sets of fan blade structures, each set consisting of an upper fan blade 41, a support roller 44, a fan blade gear 45, and a lower fan blade 46, arranged evenly along the upper edge of the outer ring of the outer sleeve 3 at 60° intervals. The support 42 of the extended fan blade 4 is fixed to the bottom of the combined disc 1 by a vertical fixing rod 101, i.e., the support 42 is a fixed support. The six sets of fan blades and the first rotating shaft 104 are connected by six brackets 42. The brackets 42 are connected to each set of fan blades and the first rotating shaft 104 by bracket rollers 44 and intermediate rollers 43, respectively. That is, the two ends of the brackets 42 are fixed to the seat rings of the intermediate rollers 43 and the bracket rollers 44, respectively. The bracket rotating shaft 47 is fixed to the shaft ring of the bracket rollers 44, and the middle part of the first rotating shaft 104 is fixed to the shaft ring of the intermediate rollers 43. The brackets 42 not only fix the positions of the bracket rotating shaft 47 and the first rotating shaft 104, but also ensure that the upper fan blades 41 and the first rotating shaft 104 can rotate. In summary, the bracket 42 is fixed, thus preventing vertical displacement of the intermediate roller 43 and the bracket roller 44. Consequently, the first rotating shaft 104 and the bracket rotating shaft 47, which are fixed on the seat rings of the intermediate roller 43 and the bracket roller 44, will not undergo vertical displacement. That is, the outer sleeve 3, which is fixedly connected to the first rotating shaft 104, will not undergo vertical displacement. Consequently, the composite sealed roller 32, which serves as the bottom cover structure of the outer sleeve 3, and the sleeve of the ball screw 5, which is fixed on the shaft ring of the small sealed roller, will not undergo vertical displacement. The size of the bracket 42 is determined by the outer sleeve 3, ensuring that the fan blade gear 45 on the extended fan blade 4 and the external gear 33 on the outer side of the outer sleeve 3 achieve gear transmission, thereby driving the upper fan blade 41 to rotate. That is, the rotation of the outer sleeve 3 is not transmitted to the upper fan blade 41 through the bracket 42, but is achieved through the connection and transmission between the external gear 33 on the outer side of the outer sleeve 3 and the fan blade gear 45 on the extended fan blade 4. Furthermore, the rotation of the outer sleeve 3 can simultaneously drive the wheel set 2 to rotate.

[0049] The ball screw 5 is vertically fixed to the bottom of the sway plate 7, and the ball screw can move up and down with the sway plate 7. The spring 6 is used to connect the combined disc 1 and the sway plate 7.

[0050] like Figure 3(a) , 3(b)As shown, the combined disk 1 consists of three sealed hollow disks of different radii (large, medium, and small), a large annular magnet 13, a small annular magnet 15, a disk spring 16, and a rubber ring 11. The three hollow disks are respectively a sealed large disk 12, a sealed medium disk 14, and a sealed small disk 17. Initially, the three are concentric, but they become non-concentric after being subjected to force during liquid surface sloshing. The rubber ring 11 is fixed to the outer surface of the sealed large disk 12. The large annular magnet 13 is installed on the inner surface of the sealed large disk 12, and the small annular magnet 15 is installed on the inner surface of the sealed medium disk 14. Several solid small balls 18 are placed inside the sealed small disk 17. A small, sealed disc 17 is installed inside a medium, sealed disc 14, connected by a disc spring 16. The medium disc 14 is then installed inside a large, sealed disc 12, with a rubber ring 11 fixed to the outer ring of the large disc 12, forming a combined disc 1. The outer diameter of the small, sealed disc 17 is smaller than the inner diameter of the medium, sealed disc 14. The disc spring 16 is installed in the gap after assembly, and the outer diameter of the medium, sealed disc 14 matches the inner diameter of the large disc. The large and small annular magnets 13 and 15 are axially magnetized to ensure that the magnetic poles are identical at the same height, generating a repulsive force when they approach each other. The inner diameter of the rubber ring 11 is equal to the outer diameter of the large, sealed disc 12, and the two are tightly fitted and fixed together. The combined disc 1 is currently designed with a support fixed inside the LNG storage tank, above the liquid surface. The height of the support can be adjusted according to the liquid level to ensure the anti-sway device functions properly.

[0051] like Figure 4 As shown, the rubber ring 11 is installed on the outer ring of the combined disc 1. Rubber has high damping properties. Even if the combined disc 1 is fixedly installed, in order to prevent the position of the fixed combined disc 1 from loosening during normal operation of the anti-sway device, which would impact the tank wall and damage the tank structure, the rubber ring 11 is added. This not only achieves energy dissipation but also reduces the threat to the safety of the tank posed by the anti-sway device itself.

[0052] like Figure 5 As shown, the wheel set 2 has a disc structure with six fan blades 21 evenly installed along its circumference at 60° intervals. Inside, partitions 22 are installed at equal intervals, and several small balls 23 are placed inside. The wheel set 2 includes two discs with their surfaces facing each other. They are connected by a central crossbar 106 and then fixed below the combined disc 1 by a vertical fixing rod 101 connected to the central crossbar 106. The second gear 105 is fixed to the central crossbar 106. The connection between the vertical fixing rod 101 and the central crossbar 106 is achieved using a roller connection. The vertical fixing rod 101 is fixed to the roller's seat ring, and the central crossbar 106 is fixed to the roller's shaft ring, thus ensuring that the vertical fixing rod 101 does not affect the rotation of the central crossbar 106, meaning that both discs can rotate under force.

[0053] like Figure 6 ,7 As shown, the outer sleeve 3 is a sealed cylinder. A ring magnet 31 is installed on the inner side of the cylinder wall. The interior is filled with damping fluid and equipped with four ball screws 5. A second rotating shaft 107 is fixedly installed at the center of the inner side of the top surface of the outer sleeve 3. An internal gear 35 is provided at the lower end of the second rotating shaft 107. A first rotating shaft 104 is fixedly installed at the center of the outer side of the top surface of the outer sleeve 3. A first gear 102 is provided at the upper end of the first rotating shaft 104. That is, the upper end of the first rotating shaft 104 is fixedly connected to the first gear 102, and the lower end is fixed at the center of the outer side of the top surface of the outer sleeve 3. The upper end of the second rotating shaft 107 is fixed at the center of the inner side of the top surface of the outer sleeve 3, and the lower end is fixedly connected to the internal gear 35. An external gear 33 is provided on the outer side of the top of the outer sleeve 3, and the external gear 33 meshes with the fan blade gear 45 of the extended fan blade 4. The bottom cover structure of the outer sleeve 3 is a composite sealed roller 32, which consists of a sealed large roller and four sealed small rollers. The composite sealed roller 32 has four round holes in the bearing area of ​​the sealed large roller, and a sealed small roller is installed in each round hole.

[0054] The ball screw 5 has a composite metal fan blade 103 mounted on its sleeve. The sleeve of the ball screw 5 is fixed to the shaft ring of the small sealed roller of the composite sealed roller 32. The leads of the four ball screws 5 are respectively connected to the shaft rings of the four small sealed rollers. A top gear 34 is fixed above each ball screw 5. The four top gears 34 are connected to the inner gear 35 at the center of the inner wall of the top surface of the outer sleeve 3 through gear engagement. The bottom of the lead of the ball screw 5 extends out of the cylinder through the shaft ring of the small sealed roller on the composite sealed roller 32 and is vertically fixed to the swaying plate 7 below it. The swaying plate 7 is made of flexible material, which meets the deformation performance requirements of the anti-sway device while also having a certain rigidity to withstand the dynamic water pressure and realize the transmission of force.

[0055] The sway reduction device of the present invention, when an earthquake occurs:

[0056] The combined disc 1 sways along with the large LNG storage tank. The rubber ring 11 ensures the structural safety of the tank while also dissipating energy. Due to inertia, the sealed middle disc 14 will undergo relative displacement with the sealed large disc 12. Because the large ring magnet 13 and the small ring magnet 15 have the same magnetic poles at the same height, they will generate a repulsive force when they approach each other. This will intensify the relative movement between the sealed large disc 12 and the sealed middle disc 14. Driven by the sealed middle disc 14, the solid ball 18 inside the sealed small disc 17 begins to move, colliding and consuming energy. The disc spring 16 will also deform due to the relative displacement between the sealed middle disc 14 and the sealed small disc 17, absorbing energy and dissipating it. The liquid inside the large LNG storage tank will also undergo horizontal movement. Due to the flexible nature of the liquid, the liquid surface will move up and down, causing the swaying plate 7 to oscillate up and down. Since the sway plate 7 is fixedly connected to the lower end of the ball screw 5 lever, it drives the lever to move up and down. The up and down movement of the ball screw 5 lever causes the sleeve of the ball screw 5 to rotate. Subsequently, the composite metal fan blade 103 on the sleeve rotates in the magnetic field generated by the damping fluid and the ring magnet 31, generating damping force and consuming energy. At the same time, the top gear 34 fixed above the ball screw 5 also rotates, further transmitting the rotation to the inner gear 35 fixed in the center of the inner wall of the top surface of the outer sleeve 3. The inner gear 35 transmits the rotation to the outer sleeve 3 through the second rotating shaft 107, thereby driving the outer sleeve 3 to rotate. The outer sleeve 3 is connected to the upper fan blade 45 via an external gear 33 fixed on its upper outer side, transmitting rotation to the upper fan blade 41. The upper fan blade 41 rotates, consuming energy. Simultaneously, the outer sleeve 3 also transmits rotation to the upper fixed first gear 102 via a first rotating shaft 104 fixed at the center of its outer top surface, which in turn drives the rotation of the second gear 105 fixed on the middle crossbar 106. The two discs fixed at both ends of the middle crossbar 106, i.e., the wheel set 2, rotate. At this time, both the fan blades outside the discs and the small balls placed inside have energy-consuming capabilities. The anti-sway device of the present invention has strong energy-consuming capabilities, can reduce the impact of liquid surface sloshing caused by earthquakes on the tank structure, and has high safety.

[0057] In this embodiment, the reset mechanism is a spring 6, which includes a connecting part on the bottom surface of the combined disc 1 and a connecting part on the swaying plate 7, providing a restoring force.

[0058] The embodiments described above are merely illustrative of the implementation methods of the present invention, but should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, any modifications and improvements made without departing from the concept of the present invention should also fall within the protection scope of the present invention.

Claims

1. A gear-driven rotation amplification type anti-sway device, characterized in that, The anti-sway device is installed inside the LNG storage tank and located at the top, including: a combined disc (1), a wheel assembly (2), an outer sleeve (3), an extended fan blade (4), a ball screw (5), a spring (6), and a swaying plate (7); the combined disc (1) is connected to the swaying plate (7) below it by a spring (6), the combined disc (1) is fixed above the inner wall of the LNG storage tank, the swaying plate (7) is attached to the inner wall of the LNG storage tank but not fixed, the wheel assembly (2), the outer sleeve (3), the extended fan blade (4), and the ball screw (5) are arranged between the combined disc (1) and the swaying plate (7), and the wheel assembly (2), the outer sleeve (3), the extended fan blade (4), the ball screw (5), and the swaying plate (7) are all located below the liquid level inside the LNG storage tank; The combined disc (1) includes three enclosed hollow discs: a large, a medium, and a small one; a large annular magnet (13); a small annular magnet (15); and a rubber ring (11). The three enclosed hollow discs are respectively a large enclosed disc (12), a medium enclosed disc (14), and a small enclosed disc (17). Initially, they are concentric, but become non-concentric during shaking. The rubber ring (11) is fixed to the outer ring of the large enclosed disc (12), and the inner ring of the large enclosed disc (12) is fixed to the outer ring of the large enclosed disc (12). A large ring magnet (13) is installed in the ring, and a small ring magnet (15) is installed on the inner side of the sealed middle disc (14). Several solid small balls (18) are placed inside the sealed small disc (17). The sealed small disc (17) is installed inside the sealed middle disc (14), and the two are connected by a disc spring (16). The sealed middle disc (14) is installed in the sealed large disc (12) to form a combined disc (1). The combined disc (1) is fixed inside the tank and located above the liquid surface.

2. The gear-driven rotation amplification type anti-sway device according to claim 1, characterized in that: The wheel set (2) is located below the combined disc (1) and includes two discs with the same structure. The discs are discs with six fan blades (21) evenly installed along the outer circumference of the discs and partitions (22) are installed at equal intervals on the inner circumference of the discs. Several small balls (23) are placed on them. The discs of the two discs face each other and are fixed at both ends of the middle crossbar (106). The second gear (105) is also fixed on the middle crossbar (106). The middle crossbar (106) is connected to the vertical fixing rod (101). The vertical fixing rod (101) is connected to the middle crossbar (106) without affecting the rotation of the middle crossbar (106). That is, the two discs can rotate under force. The top of the vertical fixing rod (101) is fixedly connected to the bottom surface of the combined disc (1), and the bottom end is connected to the bracket (42) of the extended fan blade (4). After being bent in the middle, it is sleeved with the middle crossbar (106). The outer sleeve (3) is a sealed cylinder with an annular magnet (31) installed on the inner side of the cylinder wall. The inside is filled with damping fluid and four ball screws (5) are installed. A second rotating shaft (107) is fixedly installed at the center of the inner side of the top surface of the cylinder wall of the outer sleeve (3). An internal gear (35) is provided at the lower end of the second rotating shaft (107). A first rotating shaft (104) is fixedly installed at the center of the outer side of the top surface of the cylinder wall of the outer sleeve (3). A first gear (102) is provided at the upper end of the first rotating shaft (104). An external gear (33) is provided on the outer side of the top of the cylinder wall of the outer sleeve (3). The external gear (33) cooperates with the fan blade gear (45) of the extended fan blade (4). The bottom cover structure of the outer sleeve (3) is a composite sealed roller (32), which consists of a sealed large roller and four sealed small rollers. The composite sealed roller (32) has four round holes in the bearing area of ​​the sealed large roller, and a sealed small roller is installed in each round hole. Composite metal fan blades (103) are installed on the sleeve of the ball screw (5). The lower end of the sleeve of the ball screw (5) is fixed on the shaft ring of the small sealed roller of the composite sealed roller (32). The functions of the composite sealed roller (32) are: first, to ensure the airtightness of the outer sleeve (3); second, to prevent the rotation of the outer sleeve (3) from affecting the vertical movement of the ball screw (5) lever and the rotation of the sleeve; and third, to bear the vertical load and transmit the vertical load to the first rotating shaft (104) through the outer sleeve (3). A rotating shaft (104) and a bracket (42) are connected by an intermediate roller (43). The bracket (42) then transmits the vertical load to the bottom surface of the combined disc (1) to ensure that the outer sleeve (3) will not be vertically displaced. Each ball screw (5) has a top gear (34) fixed above it. All four top gears (34) are connected to the inner gear (35) through gear engagement. The lower end of the ball screw (5) extends out of the cylinder through the shaft ring of the small sealed roller on the composite sealed roller (32) and is vertically fixed to the swaying plate (7). The extended fan blade (4) includes six sets of identical fan blade structures, an intermediate roller (43), and six identical supports (42); wherein, each set of fan blade structures consists of an upper fan blade (41), a support roller (44), a fan blade gear (45), and a lower fan blade (46) from top to bottom, and is mounted on the support rotation shaft (47); all six support rollers (44) are connected to the intermediate roller (43) through the supports (42).

3. The gear-driven rotation amplification type anti-sway device according to claim 2, characterized in that, The extended fan blade (4) specifically refers to: Six upper fan blades (41) are evenly arranged along the top outer ring of the outer sleeve (3); the bracket (42) is fixed below the combined disc (1) by being fixed to the lower end of the vertical fixing rod (101); the two ends of the six brackets (42) are respectively fixed to the seat rings of the intermediate roller (43) and the bracket roller (44), the bracket rotation shaft (47) is fixed to the shaft ring of the bracket roller (44), and the middle part of the first rotation shaft (104) is fixed to the shaft ring of the intermediate roller (43). The bracket (42) can fix the position of the bracket rotation shaft (47) and the first rotation shaft (104) without affecting the rotation of the upper fan blades (41) and the first rotation shaft (104); in addition, The first gear (102) is installed on the top of the first rotating shaft (104). The first gear (102) is connected to the second gear (105) on the middle crossbar (106) through gear engagement. The bottom of the first rotating shaft (104) is fixed at the center of the outer side of the top surface of the outer sleeve (3). That is, the rotation of the outer sleeve (3) will drive the wheel set (2) to rotate. The size of the bracket (42) is determined by the outer sleeve (3). It should ensure that the fan blade gear (45) on the extended fan blade (4) and the external gear (33) on the outer side of the top of the outer sleeve (3) achieve gear transmission, so that when the outer sleeve (3) rotates, it can simultaneously drive the upper fan blade (41) to rotate.

4. The gear-driven rotation amplification type anti-sway device according to claim 2, characterized in that, The large ring magnet (13) and small ring magnet (15) of the combined disk (1) are axially magnetized to ensure that the magnetic poles are the same at the same horizontal position, so that they generate a repulsive force when they are close together.

5. A gear-driven rotation amplification type anti-sway device according to any one of claims 2-4, characterized in that, When an earthquake occurs: The combined disc (1) shakes along with the storage tank. The rubber ring (11) ensures the safety of the storage tank structure while also having energy dissipation capabilities. The sealed middle disc (14) and the sealed large disc (12) undergo relative displacement. When the large ring magnet (13) and the small ring magnet (15) approach each other, they generate repulsive force, which further intensifies the relative motion between the sealed large disc (12) and the sealed middle disc (14). Under the drive of the sealed middle disc (14), the solid small ball (18) inside the sealed small disc (17) collides and consumes energy. The disc spring (16) also deforms due to the relative displacement between the sealed middle disc (14) and the sealed small disc (17), thus consuming energy. At the same time, during the earthquake, the liquid level in the storage tank moves up and down, causing the swaying plate (7) to bounce up and down. Then the swaying plate (7) drives the lever of the ball screw (5) to move up and down, causing the sleeve of the ball screw (5) to rotate. Subsequently, the composite metal fan blade (103) on the sleeve rotates in the magnetic field generated by the damping liquid and the ring magnet (31), generating damping force and consuming energy. At the same time, the top gear (34) fixed above the ball screw (5) will also rotate, which will further transmit to the inner gear (35) fixed at the center of the inner side of the top surface of the outer sleeve (3). The inner gear (35) will transmit the rotation to the outer sleeve (3) through the second rotating shaft (107), thereby driving the outer sleeve (3) to rotate and consuming energy.

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