Multi-directional constraint vibration reduction and isolation device for maritime work equipment

Abstract

The invention relates to the technical field of vibration reduction and isolation of maritime work equipment, and discloses a multidirectional constraint vibration reduction and isolation device for maritime work equipment, which comprises a mounting connecting plate, a supporting block and a base, the base is integrally formed at the bottom of the supporting block, the mounting connecting plate is fixedly mounted at the top of the supporting block, and an annular cavity is formed in the supporting block; according to the invention, the six fan-shaped sub-chambers are arranged, each fan-shaped sub-chamber is filled with liquid, and the liquid can shake in multiple directions within the range of the whole chamber, so that the multi-direction vibration damping device is adapted to irregular vibration such as rolling and pitching of marine engineering equipment, and the vibration damping effect is improved. And meanwhile, a one-way vibration reduction mode can be switched by means of an adjusting mechanism, the vibration reduction efficiency in the specific direction is improved in a targeted mode, based on the resonance principle of the tuned liquid damper, the liquid shaking frequency is matched with the inherent frequency of the platform, and the reverse inertia force directly counteracts vibration energy.

Description

Technical Field

[0001] This invention belongs to the field of vibration reduction and isolation technology for marine engineering equipment, and specifically relates to a multi-directional constraint vibration reduction and isolation device for marine engineering equipment. Background Technology

[0002] The marine environment is complex and changeable. Factors such as wave impact and equipment operation can cause marine engineering equipment to vibrate in multiple directions and irregularly. Long-term vibration can not only affect the operating accuracy of the equipment and shorten its service life, but may also cause structural fatigue damage and threaten the safety of the platform.

[0003] Most existing vibration reduction and isolation devices adopt linear damping structures (such as single-direction springs and dampers), which can only provide damping force in a preset single dimension (such as up and down or left and right). They do not take into account the multi-directional composite vibrations such as roll, pitch, and heave that marine equipment will generate when it is impacted by sea waves, resulting in the inability to effectively suppress vibrations in non-preset directions. The other type of device can provide multi-dimensional vibration reduction. Its vibration reduction parameters (such as damping direction and frequency matching range) are fixed after leaving the factory. It cannot be adaptively adjusted according to the changes in vibration intensity and direction caused by sea conditions (such as calm sea surface and strong winds and waves). It can only be adapted to a single working condition, has poor versatility, and has poor vibration transmission blocking effect, so it cannot achieve full-process vibration suppression. Summary of the Invention

[0004] This invention provides a multi-directional constraint vibration reduction and isolation device for marine engineering equipment, which solves the technical problems of single vibration reduction direction, limited efficiency and poor adaptability in related technologies.

[0005] This invention provides a multi-directional constraint vibration reduction and isolation device for marine engineering equipment, including a mounting connecting plate, a support block and a base. The base is integrally formed at the bottom of the support block, the mounting connecting plate is fixedly installed at the top of the support block, an annular cavity is opened inside the support block, an adjustment mechanism is provided inside the annular cavity, a vibration reduction mechanism is provided inside the base, and a vibration isolation pad is fixedly connected to the bottom of the base. The vibration damping mechanism includes a first partition plate located at the junction of the support block and the base. The first partition plate is located at the bottom of the annular cavity to separate the support block and the base. A second partition plate is inserted radially inside the first partition plate. The second partition plate is located at the six equal division points of the first partition plate. A fan-shaped sub-cavity is formed between two adjacent second partition plates below the first partition plate. The fan-shaped sub-cavity is filled with liquid, which is seawater or fresh water with added preservatives. The filling volume is 30%-50% of the total volume of the fan-shaped sub-cavity. In use, the liquid in the fan-shaped sub-cavity sways synchronously along the direction of the second partition plate. The swaying frequency of the liquid is consistent with the natural frequency of the platform, generating an inertial force opposite to the vibration direction of the platform, which counteracts the swaying of the platform. The friction between the liquid and the cavity wall converts the vibration energy into heat energy and dissipates it, reducing the vibration amplitude of the platform.

[0006] In a preferred embodiment, the first partition plate has vent holes at equal intervals on its plate body. Each vent hole is connected to a fan-shaped sub-chamber. When the liquid inside the fan-shaped sub-chamber sloshes, the air inside the chamber exchanges with the outside air through the vent holes.

[0007] In a preferred embodiment, a support column is axially arranged at the center of the lower surface of the first partition plate. The support column is fixedly connected to the base plate at the bottom of the base. The edge of one side of the second partition plate is slidably connected to the edge of the support column, and the edge of the other side of the second partition plate is slidably connected to the inner wall of the base.

[0008] In a preferred embodiment, the second partition plate has a cavity inside, and a baffle plate is inserted into the first partition plate through the cavity. There are connecting ports through the second partition plate on both sides of the bottom of the cavity, and the baffle plate is located between the two connecting ports.

[0009] In a preferred embodiment, the adjustment mechanism includes a support plate and a servo motor fixedly mounted on the top of the support plate. The bottom of the support plate is fixedly connected to the upper surface of the first partition plate. The support plate and the second partition plate are correspondingly arranged. The support plate has a receiving cavity inside, and the shape of the receiving cavity is adapted to the second partition plate.

[0010] In a preferred embodiment, the first partition plate has a strip-shaped hole inside, the top of the second partition plate is located inside the strip-shaped hole, the strip-shaped hole is located directly below the receiving cavity, and the strip-shaped hole and the vent hole are arranged in a ring-shaped interval.

[0011] In a preferred embodiment, an extension piece is provided at the corner of the top of the second partition plate, and a limiting groove is provided at the junction of the strip hole and the edge of the first partition plate. The extension piece overlaps the inner side of the limiting groove, and a lead screw is rotatably installed at the bottom of the inner side of the limiting groove, and the lead screw is threadedly connected to the extension piece.

[0012] In a preferred embodiment, bevel gears are fixedly installed on the top of the lead screw and the output end of the servo motor. The two bevel gears mesh with each other, and the servo motor drives the lead screw to move the second partition plate up and down through the meshing of the bevel gears, so that the two adjacent sector-shaped sub-chambers are connected. Liquid level sensors are provided on both sides of the second partition plate.

[0013] In a preferred embodiment, an electromagnetic block is fixedly installed on the top of the support plate, the electromagnetic block is located at the end away from the servo motor, a power supply module is fixedly installed on the top of the support column, and the wiring terminal of the electromagnetic block is connected to the power supply module to control the magnetic force of the electromagnetic block.

[0014] In a preferred embodiment, a protective box is provided at the corner of the top of the support plate, and both bevel gears are located inside the protective box, with the lead screw rotatably connected to the protective box.

[0015] The beneficial effects of this invention are: 1. This invention features six sector-shaped sub-chambers, each filled with liquid. The liquid can slosh in multiple directions throughout the entire cavity, adapting to irregular vibrations such as roll and pitch of marine equipment. Simultaneously, an adjustment mechanism allows switching to a unidirectional vibration reduction mode, specifically improving vibration reduction efficiency in a particular direction. The entire design is based on the resonance principle of a tuned liquid damper, where the liquid sloshing frequency matches the platform's natural frequency. The reverse inertial force directly cancels out the vibration energy. Combined with the energy dissipation from liquid friction and viscous resistance, this dual effect significantly reduces the vibration amplitude.

[0016] 2. This invention achieves rapid switching between connected and independent states of the sector-shaped sub-chambers through servo motors, lead screw drives, and electromagnetic control. It can flexibly adjust the vibration reduction mode according to changes in sea conditions and vibration direction to adapt to different working conditions. The vibration reduction mechanism actively cancels vibration energy, while the vibration isolation pad passively blocks vibration transmission. The two work together to achieve full-process protection from vibration source suppression to transmission path blocking, resulting in a more comprehensive vibration reduction and isolation effect. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the internal structure of the support block of the present invention.

[0019] Figure 3 This is a top view of the adjustment mechanism and vibration damping mechanism of the present invention.

[0020] Figure 4 This is a schematic diagram showing the structural breakdown of the adjustment mechanism and vibration damping mechanism of the present invention.

[0021] Figure 5 This is a schematic diagram of the planar structure of the adjustment mechanism and the vibration damping mechanism of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the second partition plate and adjustment mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram showing the disassembled structure of the second partition plate and the barrier plate of the present invention.

[0024] Figure 8 This is a top view of the second partition plate and the first partition plate of the present invention.

[0025] In the diagram: 1. Mounting connection plate; 2. Support block; 3. Base; 4. Adjustment mechanism; 41. Support plate; 42. Servo motor; 43. Power supply module; 44. Lead screw; 45. Protection box; 46. Electromagnetic block; 47. Bevel gear; 48. Receiving cavity; 5. Annular cavity; 6. Vibration damping mechanism; 61. First partition plate; 62. Vent hole; 63. Second partition plate; 64. Strip hole; 65. Extension plate; 66. Limiting groove; 67. Connecting port; 68. Baffle plate; 69. Liquid level sensor; 610. Support column; 611. Cavity; 7. Vibration isolation pad. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0027] Example 1 like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, a multi-directional constraint vibration reduction and isolation device for marine engineering equipment includes an installation connecting plate 1, a support block 2 and a base 3. The base 3 is integrally formed at the bottom of the support block 2. The installation connecting plate 1 is fixedly installed at the top of the support block 2. An annular cavity 5 is opened inside the support block 2. An adjustment mechanism 4 is provided inside the annular cavity 5. A vibration reduction mechanism 6 is provided inside the base 3. A vibration isolation pad 7 is fixedly connected to the bottom of the base 3. The vibration damping mechanism 6 includes a first partition plate 61 disposed at the junction of the support block 2 and the base 3. The first partition plate 61 is located at the bottom of the annular cavity 5 and is used to separate the support block 2 and the base 3. A second partition plate 63 is inserted radially inside the first partition plate 61. The second partition plate 63 is located at the six equal division points of the first partition plate 61. A fan-shaped sub-cavity is formed between two adjacent second partition plates 63 below the first partition plate 61. The fan-shaped sub-cavity is filled with liquid, which is seawater or fresh water with added preservatives. The filling amount is 30%-50% of the total volume of the fan-shaped sub-cavity. In use, the liquid in the fan-shaped sub-cavity sways synchronously along the direction of the separation of the second partition plates 63. The swaying frequency of the liquid is consistent with the natural frequency of the platform, generating an inertial force opposite to the vibration direction of the platform, which counteracts the swaying of the platform. The friction between the liquid and the cavity wall converts the vibration energy into heat energy and dissipates it, reducing the vibration amplitude of the platform.

[0028] In this embodiment, the specific implementation scenario is as follows: the mounting connecting plate 1 is rigidly connected to the upper device, the annular cavity 5 is rotated and damped by the damping mechanism 6, and the base 3 is passively damped by contacting the support platform through the vibration isolation pad 7, so as to achieve full-process suppression of vibration of marine engineering equipment, while ensuring that the damping mechanism 6 vibrates synchronously with the platform, and the annular cavity 5 provides installation space for the adjustment mechanism 4, while realizing physical isolation between the power component and the damping core to avoid mutual interference.

[0029] It should be noted that the vibration reduction principle of this device is based on the resonant energy transfer logic of a tuned liquid damper, which specifically consists of three steps: Step 1: Frequency matching. The sector-shaped sub-chamber consists of a first partition plate 61, two adjacent second partition plates 63, and a base 3, so that the liquid sloshing frequency is completely consistent with the natural frequency of the offshore platform, satisfying the resonance condition. The six second partition plates 63 divide the space into six sector-shaped sub-chambers, which can satisfy vibration in different directions. Step 2: Counteracting force. When the platform sways under the excitation of the waves, the liquid in the fan-shaped sub-cavity moves synchronously along the radial direction defined by the second partition plate 63. Due to the resonance characteristics, the phase of the liquid swaying is 90° different from the phase of the platform vibration, generating an inertial force opposite to the direction of the platform swaying. When the platform swings to the left to the highest point, the liquid just swings to the right to the highest point. When the platform swings to the right to the highest point, the liquid just swings to the left to the highest point. Taking the platform swinging to the left as an example: when the platform accelerates to the left, the liquid will maintain its original position and generate a rightward reaction force on the cavity. This force just cancels the leftward swaying force of the platform and directly cancels part of the vibration energy. Step 3: Energy dissipation. When the liquid sloshes in the fan-shaped sub-cavity, it rubs against the cavity wall and the surface of the second partition plate 63. At the same time, there is viscous resistance inside the liquid. These effects convert the remaining vibration mechanical energy into heat energy and dissipate it, further reducing the vibration amplitude of the platform.

[0030] It should also be noted that the vibration isolation pad 7 is used to block the transmission of vibration. The vibration isolation pad 7 is connected to the base 3 and is made of rubber or composite vibration isolation material. Its function is to block the transmission of external vibration sources such as ocean wave impact and equipment operation vibration to the main body of the platform, while absorbing the residual energy generated by the vibration of the device itself, so as to achieve dual protection of vibration reduction and vibration isolation.

[0031] Example 2 like Figure 3 , Figure 4 and Figure 5As shown, the first partition plate 61 has vent holes 62 evenly spaced on its body. Each vent hole 62 is connected to a fan-shaped sub-chamber. When the liquid in the fan-shaped sub-chamber sloshes, the air inside the chamber exchanges with the outside air through the vent holes 62. A support column 610 is axially arranged at the center of the lower surface of the first partition plate 61. The support column 610 is fixedly connected to the base plate at the bottom of the base 3. One edge of the second partition plate 63 is slidably connected to the edge of the support column 610, and the other edge of the second partition plate 63 is slidably connected to the inner wall of the base 3.

[0032] It should be noted that the vent 62 on the first partition plate 61 is used to ensure smooth liquid sloshing. During the liquid sloshing, it can balance the air pressure in the sector-shaped sub-chamber. Since the sector-shaped sub-chamber is a relatively closed space, when the liquid sloshes rapidly under vibration excitation, if there is no vent 62, the air in the chamber will be squeezed or pulled, forming "air pressure resistance", which will hinder the normal sloshing of the liquid and reduce the vibration reduction efficiency. Each sector-shaped sub-chamber has an independent vent 62. When the liquid sloshes, the high-pressure side air can be discharged through the vent 62, and the low-pressure side can draw in the outside air, realizing rapid exchange of air inside and outside the chamber and completely eliminating air pressure resistance. A dustproof and waterproof filter is installed inside the vent 62.

[0033] It should also be noted that the support column 610 at the center of the lower surface of the first partition plate 61 has a central support and guiding function. It is axially fixed between the first partition plate 61 and the base plate 3 to form a central skeleton to prevent the first partition plate 61 from deforming due to liquid pressure or vibration. At the same time, the inner edge of the second partition plate 63 slides against the outer wall of the support column 610 and the outer edge slides against the inner wall of the base 3 to form a bidirectional sliding constraint, ensuring that the second partition plate 63 moves precisely in the radial direction when moving up and down without offset or jamming, and ensuring the sealing of the fan-shaped sub-chamber.

[0034] Example 3 like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the second partition plate 63 has a cavity 611 inside. A baffle plate 68 is inserted into the cavity 611 inside the first partition plate 61. The bottom sides of the cavity 611 are provided with connecting ports 67 that penetrate the second partition plate 63. The baffle plate 68 is located between the two connecting ports 67. The adjustment mechanism 4 includes a support plate 41 and a servo motor 42 fixedly installed on the top of the support plate 41. The bottom of the support plate 41 is fixedly connected to the upper surface of the first partition plate 61. The support plate 41 and the second partition plate 63 are correspondingly arranged. The support plate 41 has a receiving cavity 48 inside. The shape of the receiving cavity 48 is adapted to the second partition plate 63. The first partition plate 61 has a strip hole 64 inside. The top of the second partition plate 63 is located inside the strip hole 64. The strip hole 64 is located directly below the receiving cavity 48, and the strip hole 64 and the vent hole 62 are arranged in a ring at intervals.

[0035] It should be noted that the cavity 611 inside the second partition plate 63, the connecting port 67, and the baffle plate 68 form a connecting channel between multiple sector-shaped sub-chambers. Liquid can pass through the connecting port 67 and be evenly distributed into each sector-shaped sub-chamber. The cavity 611 is opened along the axial direction of the second partition plate 63. The baffle plate 68 is inserted into the cavity 611, with its bottom located between the two connecting ports 67, to block the two connected sector-shaped sub-chambers. When the bottom of the baffle plate 68 is removed from the connecting port 67, the liquid between the two sector-shaped sub-chambers can flow. After detecting that the total error of the liquid in each sector-shaped sub-chamber does not exceed 2%, the baffle plate 68 is re-inserted between the two connecting ports 67 to block the connecting channel and realize the independence of the sector-shaped sub-chambers.

[0036] It should also be noted that the support plate 41 of the adjustment mechanism 4 corresponds one-to-one with the second partition plate 63 and is fixedly connected to the first partition plate 61 to form a stable support. The receiving cavity 48 inside the support plate 41 provides a receiving space for the upward movement of the second partition plate 63, and its shape is adapted to the second partition plate 63. The strip hole 64 opened inside the first partition plate 61 provides a channel for the movement of the second partition plate 63.

[0037] Example 4 like Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, an extension piece 65 is provided at the corner of the top of the second partition plate 63. A limiting groove 66 is provided at the junction of the strip hole 64 and the edge of the first partition plate 61. The extension piece 65 overlaps the inner side of the limiting groove 66. A lead screw 44 is rotatably installed at the bottom of the inner side of the limiting groove 66, and the lead screw 44 is threadedly connected to the extension piece 65. A bevel gear 47 is fixedly installed at the top of the lead screw 44 and the output end of the servo motor 42. The two bevel gears 47 mesh with each other. The servo motor 42 drives the lead screw 44 to move the second partition plate up and down through the meshing of the bevel gears 47. 63, connecting two adjacent sector-shaped sub-chambers. Liquid level sensors 69 are provided on both sides of the second partition plate 63. An electromagnetic block 46 is fixedly installed on the top of the support plate 41. The electromagnetic block 46 is located at the end away from the servo motor 42. A power supply module 43 is fixedly installed on the top of the support column 610. The wiring terminal of the electromagnetic block 46 is connected to the power supply module 43 to control the magnetic force of the electromagnetic block 46. A protective box 45 is provided at the corner of the top of the support plate 41. Two bevel gears 47 are located inside the protective box 45, and the lead screw 44 is rotatably connected to the protective box 45.

[0038] It should be noted that the extension piece 65 at the top corner of the second partition plate 63 is engaged in the limiting groove 66 and threadedly connected to the lead screw 44. Simultaneously, the side wall of the limiting groove 66 restricts the horizontal displacement of the extension piece 65, ensuring that the second partition plate 63 can only move axially up and down. The lead screw 44 is vertically rotatably mounted at the bottom of the limiting groove 66 and threadedly connected to the extension piece 65. The bevel gear 47 at the output end of the servo motor 42 meshes with the bevel gear 47 at the top of the lead screw 44, achieving power steering and transmission. When the servo motor 42 rotates forward or reverse, the bevel gear 47 can drive the lead screw 44 to rotate synchronously, thereby driving the extension piece 65 to move... The second partition plate 63 moves up and down along the strip hole 64. When the second partition plate 63 moves up, the two adjacent sector sub-chambers are connected, completing the vibration reduction mode switch (from multi-directional vibration reduction to unidirectional vibration reduction). At this time, the angle of the second partition plate 63 needs to be adjusted to an asymmetrical arrangement. By pulling out two of the second partition plates 63, two sets of 60° sector sub-chambers + two sets of 120° sector sub-chambers are formed, allowing the liquid to mainly sway in this direction, thus improving the unidirectional vibration reduction efficiency. If it is necessary to suppress multi-directional vibrations such as roll and pitch, it is not necessary to pull out the second partition plate 63. Just keep it symmetrically and equiangularly arranged, so that the liquid generates uniform damping force in multiple directions.

[0039] The liquid level sensors 69 installed on both sides of the second partition plate 63 are capacitive liquid level sensors. Their detection ends are in direct contact with the liquid in the sector-shaped sub-chambers, used to monitor the liquid level difference between adjacent sub-chambers in real time and feed the signal back to the control system of the power supply module 43. When the second partition plate 63 moves upward, the two sector-shaped sub-chambers are connected, and the liquid flows between the two sector-shaped sub-chambers. The power supply module 43 supplies power to the electromagnetic block 46. When the blocking plate 68 contacts the electromagnetic block 46, the electromagnetic block 46 attracts the blocking plate 68. When the second partition plate 63 moves downward and contacts the bottom of the base 3, the presence of the connecting port 67 still ensures normal liquid flow. When the platform returns to stability and the liquid remains slightly still, the liquid level sensor 69 monitors the total liquid volume. When the preset threshold is met, the control system immediately controls the power supply module 43 to cut off the power. The baffle plate 68 slides down along the cavity 611 and inserts between the two connecting ports 67 to block the liquid flow, forming six independent fan-shaped sub-chambers. The total liquid volume error in each fan-shaped sub-chamber does not exceed 2%. The protective box 45 is a stainless steel sealed shell that completely encloses the two meshing bevel gears 47. Waterproof bearings and sealing rings are installed at the connection with the lead screw 44 to prevent the salt spray and water vapor in the marine environment from corroding the gear transmission structure.

[0040] Working principle of the invention: The device consists of a mounting connection plate 1, a support block 2, a base 3, an adjustment mechanism 4, a vibration damping mechanism 6, and vibration isolation pads 7. The mounting connection plate 1 is rigidly connected to the vibration-sensitive areas of the offshore platform, such as the bottom of the living quarters and the equipment base. The base 3 contacts the platform through the bottom vibration isolation pads 7 to ensure that the device vibrates synchronously with the platform. In the vibration damping mechanism 6, six second partition plates 63 are radially distributed along the six equal division points of the first partition plate 61. Together with the first partition plate 61, the base 3, and the central support column 610, they enclose the inner side of the base 3 to form six independent fan-shaped sub-chambers. Each fan-shaped sub-chamber is filled with seawater or anti-corrosion fresh water, which accounts for 30%-50% of the total volume of the fan-shaped sub-chamber. When the platform sways due to wave excitation, the liquid in the fan-shaped sub-chamber sways synchronously along the radial direction defined by the second partition plate 63. Due to resonance characteristics, the phase of the liquid swaying is 90° out of phase with the platform vibration. That is, when the platform swings to its highest point to the left, the liquid swings to its highest point to the right, and vice versa. The direction of the inertial force generated by the liquid swaying is completely opposite to the direction of the platform swaying. It should be noted that when the platform accelerates to the left, the liquid maintains its original position due to inertia and generates a rightward reaction force on the cavity. This reverse inertial force directly offsets part of the platform's swaying power and weakens the vibration amplitude. During the swaying process in the fan-shaped sub-cavity, the liquid rubs against the cavity wall of the fan-shaped sub-cavity and the surface of the second partition plate 63. On the other hand, there is viscous resistance inside the liquid. These effects convert the remaining vibration mechanical energy into heat energy, which is dissipated to the outside through the device shell, further reducing the platform's vibration energy and preventing the continuous transmission of vibration. It should also be noted that the fan-shaped sub-chamber is a relatively closed space. When the liquid shakes rapidly, it will compress or pull the internal air. At this time, the vent 62 on the first partition plate 61 plays a role. The high-pressure side air is discharged through the vent 62, and the low-pressure side draws in the outside air through the vent 62, realizing the rapid exchange of air inside and outside the chamber. The vibration isolation pad 7 at the bottom of the base 3 is made of rubber or composite vibration isolation material. When the platform vibration condition changes and the vibration reduction mode needs to be switched, the adjustment mechanism 4 is activated to switch the connection state between multiple sector sub-chambers. First, the servo motor 42 transmits power to the lead screw 44 through two meshing bevel gears 47. During the rotation of the lead screw 44, the extension plate 65 drives the second partition plate 63 to move up and down along the strip hole 64, so that the two adjacent sector sub-chambers can switch between connected or independent states. When single-direction vibration reduction is required, two of the second partition plates 63 are removed to form two sets of 60° sector sub-chambers + two sets of 120° sector sub-chambers, so that the liquid mainly sloshes along this direction, improving the unidirectional vibration reduction efficiency. If it is necessary to suppress multi-direction vibrations such as roll and pitch, it is not necessary to remove the second partition plates 63. They can be kept symmetrically and equiangularly arranged to allow the liquid to generate uniform damping force in multiple directions. The capacitive liquid level sensors 69 on both sides of the second partition plate 63 monitor the liquid level height difference between adjacent sub-chambers in real time. Depending on the vibration direction, the direction of liquid level change in different sector sub-chambers is also different. If the vibration direction of the platform changes, the signal is fed back to the control system of the power supply module 43, triggering the state switching command, and the control system starts the servo motor 42. The independent mode is adapted to multi-directional irregular vibration. The second partition plate 63 remains stationary, and adjacent sub-chambers are not interconnected. The liquid can slosh throughout the entire cavity, which meets the requirements of omnidirectional vibration reduction, while ensuring that the total liquid volume error in each sub-chamber does not exceed 2%. Connectivity mode adapts to unidirectional vibration: The corresponding servo motor 42 is activated according to the vibration direction. The servo motor 42 is driven by the meshing of the bevel gear 47 and the screw 44 drives the second partition plate 63 to move upward. The control system controls the power supply module 43 to power the electromagnetic block 46. The electromagnetic block 46 generates magnetic force to attract the blocking plate 68. After the two second partition plates 63 move upward, two sets of 60° fan-shaped sub-chambers + two sets of 120° fan-shaped sub-chambers are formed, allowing the liquid to mainly sway along this direction, improving the unidirectional vibration reduction efficiency. The electromagnetic block 46 maintains the state of attraction to the blocking plate 68. When switching back to independent mode, the output of servo motor 42 reverses, and the second partition plate 63 moves down, initially separating the fan-shaped sub-chambers. At this time, the liquid still flows between the two fan-shaped sub-chambers through the connecting port 67. The liquid level sensor 69 continuously monitors the liquid level. When the liquid level tends to be calm and meets the threshold, the control system controls the power supply module 43 to cut off the power. The baffle plate 68 slides down along the cavity 611 and is inserted between the two connecting ports 67 to block the liquid flow, forming six independent fan-shaped sub-chambers. At this time, multi-directional vibration reduction continues.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment, comprising a mounting connecting plate (1), a support block (2), and a base (3), wherein the base (3) is integrally formed on the bottom of the support block (2), and the mounting connecting plate (1) is fixedly installed on the top of the support block (2), characterized in that, The support block (2) has an annular cavity (5) inside, and an adjustment mechanism (4) is provided inside the annular cavity (5). The base (3) has a vibration damping mechanism (6) inside, and a vibration isolation pad (7) is fixedly connected to the bottom of the base (3). The vibration damping mechanism (6) includes a first partition plate (61) set at the junction of the support block (2) and the base (3). The first partition plate (61) is located at the bottom of the annular cavity (5) to separate the support block (2) and the base (3). A second partition plate (63) is inserted radially inside the first partition plate (61). The second partition plate (63) is located at the six equal division points of the first partition plate (61). A fan-shaped sub-cavity is formed between two adjacent second partition plates (63) below the first partition plate (61). The fan-shaped sub-cavity is filled with liquid, which is seawater or fresh water with added preservatives. The filling amount is 30%-50% of the total volume of the fan-shaped sub-cavity. When in use, the liquid in the fan-shaped sub-cavity sways synchronously along the direction of the second partition plate (63). The swaying frequency of the liquid is consistent with the natural frequency of the platform, generating an inertial force opposite to the vibration direction of the platform, which counteracts the swaying of the platform. The friction between the liquid and the cavity wall converts the vibration energy into heat energy and dissipates it, reducing the vibration amplitude of the platform.

2. The multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 1, characterized in that, The first partition plate (61) has vent holes (62) at equal intervals on its plate body. Each vent hole (62) is connected to a fan-shaped sub-chamber. When the liquid inside the fan-shaped sub-chamber shakes, the air inside the chamber exchanges with the outside air through the vent hole (62).

3. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 2, characterized in that, A support column (610) is axially arranged at the center of the lower surface of the first partition plate (61). The support column (610) is fixedly connected to the base plate at the bottom of the base (3). The edge of one side of the second partition plate (63) is slidably connected to the edge of the support column (610), and the edge of the other side of the second partition plate (63) is slidably connected to the inner wall of the base (3).

4. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 3, characterized in that, The second partition plate (63) has a cavity (611) inside. A baffle plate (68) is inserted into the cavity (611) inside the first partition plate (61). There are connecting ports (67) through the second partition plate (63) on both sides of the bottom of the cavity (611). The baffle plate (68) is located between the two connecting ports (67).

5. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 3, characterized in that, The adjustment mechanism (4) includes a support plate (41) and a servo motor (42) fixedly installed on the top of the support plate (41). The bottom of the support plate (41) is fixedly connected to the upper surface of the first partition plate (61). The support plate (41) and the second partition plate (63) are correspondingly arranged. The support plate (41) has a receiving cavity (48) inside, and the shape of the receiving cavity (48) is adapted to the second partition plate (63).

6. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 5, characterized in that, The first partition plate (61) has a strip hole (64) inside its body. The top of the second partition plate (63) is located inside the strip hole (64). The strip hole (64) is located directly below the receiving cavity (48), and the strip hole (64) and the vent hole (62) are arranged in a ring-shaped interval.

7. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 6, characterized in that, An extension piece (65) is provided at the corner of the top of the second partition plate (63). A limiting groove (66) is provided at the junction of the strip hole (64) and the edge of the first partition plate (61). The extension piece (65) overlaps the inner side of the limiting groove (66). A screw rod (44) is rotatably installed at the bottom of the inner side of the limiting groove (66), and the screw rod (44) is threadedly connected to the extension piece (65).

8. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 7, characterized in that, Both the top of the lead screw (44) and the output end of the servo motor (42) are fixedly installed with bevel gears (47). The two bevel gears (47) mesh with each other, and the servo motor (42) drives the lead screw (44) to move the second partition plate (63) up and down through the meshing of the bevel gears (47), so that the two adjacent fan-shaped sub-chambers are connected. Liquid level sensors (69) are provided on both sides of the second partition plate (63).

9. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 5, characterized in that, An electromagnetic block (46) is fixedly installed on the top of the support plate (41). The electromagnetic block (46) is located at the end away from the servo motor (42). A power supply module (43) is fixedly installed on the top of the support column (610). The wiring terminal of the electromagnetic block (46) is connected to the power supply module (43) to control the magnetic force of the electromagnetic block (46).

10. A multi-directional constraint vibration reduction and isolation device for marine engineering equipment according to claim 8, characterized in that, A protective box (45) is provided at the corner of the top of the support plate (41). Two bevel gears (47) are located inside the protective box (45), and the lead screw (44) is rotatably connected to the protective box (45).

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