Floating raft vibration isolation devices and ships

Abstract

This invention belongs to the field of marine equipment vibration isolation technology, and discloses a floating raft vibration isolation device and a vessel. The floating raft vibration isolation device includes an installation component, a vibration isolator, and a floating raft. The floating raft is installed on the installation component via the vibration isolator and has an internal sliding groove and a center of gravity adjustment mechanism. The center of gravity adjustment mechanism includes a counterweight block slidably disposed in the sliding groove, a screw rod rotatably disposed in the sliding groove, an opening and closing component disposed on the counterweight block and connected to a first motor, a triggering component, and a second motor. When the floating raft tilts, causing the counterweight block to slide to a preset position and contact the triggering component, the first motor drives the opening and closing component to actuate, switching the counterweight block and screw rod from a disengaged state to a engaged state. Simultaneously, the second motor drives the screw rod to rotate, causing the counterweight block to move in the opposite direction to the sliding direction, thereby adjusting the center of gravity of the floating raft. This invention can achieve automatic center of gravity compensation when the device tilts, improving force balance, and can be applied to vibration isolation protection of equipment such as generator sets.

Description

Technical Field

[0001] This invention relates to the field of vibration isolation technology for marine equipment, and more particularly to a floating raft vibration isolation device and a ship. Background Technology

[0002] Ships typically generate significant vibrations during operation. To reduce the transmission of vibrations to the hull, improve equipment stability, and enhance user comfort, vibration isolation structures are usually installed between the equipment and the hull. Common vibration isolation methods include rigid base isolation, double-layer isolation, and floating raft isolation. Among these, floating raft isolation is widely used in marine equipment, especially marine generator sets, due to its superior isolation effect and broad applicability.

[0003] Existing floating raft vibration isolation devices generally include mounting components, the floating raft, and vibration isolators. In order to improve the stress situation of the floating raft under tilting or eccentric loading conditions, some solutions will set up a counterweight structure on the floating raft. By adjusting the distribution of counterweights at different locations, the overall weight distribution and center of gravity of the floating raft are changed, thereby compensating for eccentric loading under tilting conditions and improving the stress balance of each vibration isolator to a certain extent.

[0004] However, existing counterweight adjustment methods are mostly manual, typically requiring operators to manually adjust the center of gravity by inserting, moving, or replacing counterweights while the ship is stopped or under maintenance. This type of adjustment is a static method, more suitable for the installation or maintenance phase, and cannot meet the needs of dynamic operating conditions during actual navigation.

[0005] During ship navigation, the tilting of the hull is typically dynamic, random, and continuous due to external factors such as wind and waves, and the stress state of the floating raft also changes accordingly. Existing manual static adjustment schemes cannot respond in real time to the shift of the floating raft's center of gravity during navigation, which can easily lead to persistent uneven loading on the floating raft, uneven stress on the vibration isolators, and affect the vibration isolation effect and operational stability. At the same time, existing structures usually lack mechanisms for visually recording and monitoring the tilting situation, making it difficult to understand the stress on the equipment and hindering subsequent maintenance analysis.

[0006] Therefore, there is a need to provide a floating raft vibration isolation device to solve the problem that existing floating raft vibration isolation devices are unable to automatically respond to tilting and perform dynamic balance adjustment during ship navigation. Summary of the Invention

[0007] The purpose of this invention is to provide a floating raft vibration isolation device to solve the problem that the existing floating raft vibration isolation devices rely heavily on manual operation for counterweight adjustment and are difficult to automatically respond and adjust the center of gravity in real time when the device tilts.

[0008] To achieve this objective, the present invention adopts the following technical solution: This invention provides a raft vibration isolation device, comprising: a mounting component, a vibration isolator, a raft, and a center of gravity adjustment mechanism; the raft is mounted on the mounting component via the vibration isolator, and a sliding groove is provided inside the raft; the center of gravity adjustment mechanism is disposed inside the raft and includes a counterweight, an opening and closing assembly, a screw, a triggering assembly, a first motor, and a second motor; wherein the counterweight is slidably disposed within the sliding groove; the screw is rotatably disposed within the sliding groove and passes through the counterweight; the opening and closing assembly is disposed on the counterweight and is drively connected to the first motor, for causing the counterweight to engage with the screw. The mechanism switches between a disengaged state and a driven engagement state; the second motor is drivenly connected to the screw; the triggering component is located in the slide groove and is triggered when the raft tilts, causing the counterweight to slide along the slide groove to a preset position; wherein, when the triggering component is triggered, the first motor drives the opening and closing component to switch the counterweight and the screw from a disengaged state to a driven engagement state, and the second motor drives the screw to rotate, thereby moving the counterweight along the slide groove in the opposite direction to the sliding direction of the counterweight, thereby adjusting the center of gravity of the raft.

[0009] Optionally, the opening and closing assembly includes an opening and closing unit, which includes a worm gear, multiple arc-shaped blocks, and multiple connecting rods. The worm gear is rotatably disposed within the counterweight block. The multiple arc-shaped blocks are disposed on the inner side of the worm gear and form an opening and closing area through which the screw passes. The inner side of each arc-shaped block is provided with a threaded structure that can be threadedly connected to the screw. Each arc-shaped block is rotatably connected to the worm gear through at least one connecting rod. The center of gravity adjustment mechanism also includes a worm, and the first motor is torsionally connected to the worm. The worm extends along the extension direction of the groove and meshes with the worm gear.

[0010] Optionally, multiple opening and closing units are provided, and the multiple opening and closing units are spaced apart along the extension direction of the slide groove; the worm gear meshes with the worm wheels in the multiple opening and closing units in sequence, so that when the first motor drives the worm gear to rotate, it drives the multiple worm wheels to rotate synchronously.

[0011] Optionally, the triggering component includes a first button switch and a second button switch, which are respectively located on the inner sides of both ends of the slide along its extension direction; wherein, when the counterweight slides to a preset position on one side of the slide, it contacts the first button switch to trigger the first motor and the second motor to operate; when the counterweight slides to a preset position on the other side of the slide, it contacts the second button switch to trigger the first motor and the second motor to operate.

[0012] Optionally, the center of gravity adjustment mechanism further includes a reset elastic element connected between the raft and the counterweight, which provides a reset force after the counterweight slides along the groove.

[0013] Optionally, the raft vibration isolation device further includes a reminder mechanism, which is linked to the counterweight. The reminder mechanism includes a drive component, a one-way rotation component, and a display component. The drive component is drivenly connected to the counterweight and can convert the linear motion of the counterweight into rotational motion. The one-way rotation component is located between the drive component and the display component and is drivenly connected to both the drive component and the display component. The one-way rotation component is configured to output rotational motion when the output end of the drive component rotates in a set direction. The display component is configured to count and display the number of rotational motions output by the one-way rotation component.

[0014] Optionally, the actuating component includes teeth, gears, and a rotating shaft; the teeth are located at the bottom of the counterweight, the gears are rotatably located on the side of the raft and mesh with the teeth, and the rotating shaft is rotatably located on the side of the raft and is torsionally connected to the gears, so as to drive the rotating shaft to rotate when the counterweight reciprocates.

[0015] Optionally, the unidirectional rotation assembly includes an active plate and a driven plate; wherein the active plate is connected to the output end of the actuation assembly, and the driven plate is connected to the input end of the display assembly; the active plate is located inside the driven plate and is configured to cooperate with the driven plate so that the active plate can rotate relative to the driven plate in a preset rotation direction and drive the driven plate to rotate in a direction opposite to the preset rotation direction.

[0016] Optionally, the active plate is provided with a plurality of slots spaced apart along the circumference, and each slot is provided with a limiting spring and a limiting ball; the driven plate is provided with a plurality of ball grooves spaced apart along the circumference to cooperate with the limiting ball, and a guide slope is provided at the ball groove, so that the limiting ball is limited to the ball groove or disengaged from the ball groove along the guide slope when the active plate rotates.

[0017] The present invention also provides a vessel, which includes a hull, a generator set, and the aforementioned floating raft vibration isolation device; wherein the mounting component is connected to the hull, and the generator set is mounted on the floating raft.

[0018] Beneficial effects: This invention provides a raft vibration isolation device that, when the device tilts, triggers a component through a counterweight contact, causing the opening and closing component to actuate under the action of a first motor. This establishes a transmission connection between the counterweight and the screw, which in turn moves the counterweight, automatically adjusting the raft's center of gravity. Compared to existing manual static adjustment methods, this invention automatically compensates for center of gravity shifts, reduces raft eccentric loading, improves the force balance of the vibration isolator, and enhances the device's operational stability.

[0019] The present invention provides a ship in which, when the hull tilts, the center of gravity of the floating raft is adjusted by a floating raft vibration isolation device, which can improve the off-center load state between the generator set and the floating raft, thereby improving the operational stability of the generator set under dynamic tilting conditions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a floating raft vibration isolation device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a raft in one embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure after being cut along the dashed line in the middle; Figure 4 for Figure 3 A magnified view of a portion of point D in the middle; Figure 5 This is a cross-sectional view of the counterweight block in its initial position according to an embodiment of the present invention; Figure 6 for Figure 5 A schematic diagram of the local structure at point A in the middle; Figure 7 This is a schematic diagram of the structure of the opening and closing component cooperating with the screw and the second motor in one embodiment of the present invention; Figure 8 for Figure 7 A magnified view of a portion of point B in the middle; Figure 9 This is a schematic diagram of the structure when the arc-shaped block and the screw are in a transmission engagement state in one embodiment of the present invention; Figure 10 This is a schematic diagram of the structure when the arc-shaped block and the screw are in a separated state in one embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the reminder mechanism disposed on the side of the raft in one embodiment of the present invention; Figure 12 for Figure 11 A magnified view of a portion of point C in the middle; Figure 13 This is a schematic diagram of the linkage between the reminder mechanism and the counterweight in one embodiment of the present invention; Figure 14This is a schematic diagram of the structure of a unidirectional rotation component in one embodiment of the present invention; Figure 15 This is an exploded view of the unidirectional rotation component in one embodiment of the present invention; Figure 16 for Figure 15 A schematic diagram of the structure after the driving plate and the driven plate are assembled. Figure 17 for Figure 15 Exploded view of the active and passive plates.

[0021] In the picture: 1. Mounting component; 2. Vibration isolator; 3. Float; 4. Slide groove; 5. Counterweight; 6. Empty groove; 7. Worm gear; 8. Arc block; 9. Connecting rod; 10. First groove; 11. First motor; 12. Worm; 13. Screw; 14. Second groove; 15. Second motor; 16. Third groove; 17. Reset elastic element; 18. Fourth groove; 19. Controller; 20. Mounting slot; 21. First push-button switch; 22. Second push-button switch; 23. Fifth groove; 24. Tooth; 25. Gear; 26. Driving plate; 27. Rewind shaft; 28. Driven plate; 29. ​​Groove; 30. Limiting spring; 31. Ball groove; 32. Movable groove; 33. Guide limiting part; 34. Release shaft; 35. Reminder belt; 36. Indicator rod; 37. Rotating shaft; 38. Limiting ball; 39. Buffer element; 40. Mounting hole; D1 is the first direction; D2 is the second direction. Detailed Implementation

[0022] Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are for teaching those skilled in the art how to implement the invention, and are not intended to exhaustively describe all possible embodiments of the invention, nor to limit the scope of the invention.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, "torsional connection" refers to a connection between two components that can transmit torque, including direct or indirect connections. For example, the two components can be directly connected in a torsional manner via a spline.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. For ease of description, in this embodiment, the width direction of the raft 3 is defined as the first direction D1, the length direction of the raft 3 is defined as the second direction D2, and the extension direction of the slide 4 is the second direction D2. The first direction D1 and the second direction D2 are only used to illustrate the relative positional and kinematic relationships of the components and should not be construed as limiting the scope of protection of this application.

[0026] like Figures 1 to 3 As shown, this embodiment provides a floating raft vibration isolation device, including a mounting component 1, a vibration isolator 2, a floating raft 3, and a center of gravity adjustment mechanism. The floating raft 3 is mounted on the mounting component 1 via the vibration isolator 2, and can isolate and buffer the vibrations generated during the operation of the generator set. The floating raft 3 has a sliding groove 4 inside, and the center of gravity adjustment mechanism is located inside the floating raft 3 to adjust the center of gravity of the floating raft 3 when the device tilts, so as to improve the off-center load state of the floating raft 3 and improve the overall force balance.

[0027] like Figures 3 to 5 As shown, the center of gravity adjustment mechanism includes a counterweight 5, an opening and closing assembly, a screw 13, a triggering assembly, a first motor 11, and a second motor 15. The counterweight 5 is slidably disposed within the slide groove 4 and is movable along the extension direction of the slide groove 4. The screw 13 is rotatably disposed within the slide groove 4 and passes through the counterweight 5. The opening and closing assembly is disposed within the counterweight 5 and is drivenly connected to the first motor 11, used to switch between a disengaged state and a driven engagement state between the counterweight 5 and the screw 13. The second motor 15 is drivenly connected to the screw 13 and is used to drive the screw 13 to rotate. The triggering assembly is disposed within the slide groove 4 and is triggered when the raft 3 tilts, causing the counterweight 5 to slide to one side along the slide groove 4 to a preset position. When the triggering component is triggered, the first motor 11 drives the opening and closing component to switch the counterweight 5 and the screw 13 from a disengaged state to a transmission engagement state; the second motor 15 drives the screw 13 to rotate, thereby moving the counterweight 5 along the slide groove 4 in the opposite direction to the sliding direction of the counterweight 5, thereby adjusting the center of gravity of the raft 3.

[0028] Therefore, the floating raft vibration isolation device provided in this embodiment, by setting a counterweight 5, an opening and closing assembly, a screw 13, a trigger assembly, a first motor 11, and a second motor 15 inside the floating raft 3, allows the counterweight 5 to slide along the slide groove 4 under its own weight when the floating raft 3 tilts, and to contact the trigger assembly after sliding to a preset position. Subsequently, the first motor 11 drives the opening and closing assembly to operate, establishing a transmission relationship between the counterweight 5 and the screw 13. The second motor 15 then drives the screw 13 to rotate, thereby causing the counterweight 5 to move in the opposite direction to its initial sliding direction. Based on this, the counterweight 5 can compensate for and adjust the center of gravity of the floating raft 3 when the device tilts, reducing the degree of off-center loading of the floating raft 3 and improving the force balance among the vibration isolators 2. Compared with the existing schemes that rely on manual static adjustment, this embodiment can adapt to the dynamic tilting conditions during operation, and can complete the center of gravity adjustment without real-time manual intervention, thereby improving the stability of the device operation.

[0029] Optionally, such as Figure 3 As shown, multiple sliding grooves 4 can be provided inside the raft 3, and the multiple sliding grooves 4 are arranged at intervals along the first direction D1. Each sliding groove 4 can be equipped with a center of gravity adjustment mechanism. A second groove 14 can be provided near one end of the raft 3, and the second groove 14 is used to install a second motor 15.

[0030] like Figure 3 As shown, a slot 6 is formed inside the counterweight 5 along the second direction D2, which is used to accommodate the opening and closing unit. A first groove 10 is formed at one end of the counterweight 5, which is used to install the first motor 11. A mounting hole 40 is also provided on the counterweight 5, which runs through the second direction D2, and the screw 13 passes through the mounting hole 40.

[0031] In one embodiment, such as Figures 6 to 10 As shown, the opening and closing assembly includes an opening and closing unit disposed within the slot 6. The opening and closing unit includes a worm gear 7, multiple arc-shaped blocks 8, and multiple connecting rods 9. The worm gear 7 is rotatably disposed within the counterweight 5. Multiple arc-shaped blocks 8 are disposed on the inner side of the worm gear 7, forming an opening and closing area through which the screw 13 passes. The inner side of each arc-shaped block 8 is provided with a threaded structure capable of threaded connection with the screw 13. Each arc-shaped block 8 is rotatably connected to the worm gear 7 via at least one connecting rod 9. A first motor 11 is disposed within the first groove 10 and is torsionally connected to the worm 12; the worm 12 extends along the extension direction of the groove 4 and meshes with the worm gear 7.

[0032] Furthermore, multiple opening and closing units can be provided, and these units are spaced apart along the extension direction of the slide groove 4. Correspondingly, multiple separate empty slots 6 are formed in the counterweight block 5, and each opening and closing unit is respectively located in one empty slot 6. The worm gear 12 passes through the multiple empty slots 6 in sequence along the second direction D2 and meshes with the worm wheels 7 in the multiple opening and closing units, so that when the first motor 11 drives the worm gear 12 to rotate, it drives the multiple worm wheels 7 to rotate synchronously.

[0033] By setting multiple opening and closing units, multiple transmission action points can be formed along the length of the counterweight 5, which helps to improve the synchronization and transmission stability of the opening and closing actions of the multiple arc-shaped blocks 8, and also helps to improve the reliability of the transmission cooperation between the counterweight 5 and the screw 13. In this embodiment, the number of opening and closing units is three.

[0034] Preferably, in this embodiment, each arc block 8 is rotatably connected to the worm gear 7 via a connecting rod 9, that is, multiple connecting rods 9 are arranged one-to-one with multiple arc blocks 8, one end of each connecting rod 9 is rotatably connected to the worm gear 7, and the other end is rotatably connected to one of the arc blocks 8, so that when the worm gear 7 rotates, it drives multiple arc blocks 8 to open and close synchronously.

[0035] like Figure 3 and Figure 4 As shown, the second motor 15 is installed in the second groove 14 and is torsionally connected to the screw 13 for driving the screw 13 to rotate. The counterweight 5 is provided with a mounting hole 40, and the screw 13 passes through the mounting hole 40. The mounting hole 40 is used to allow the screw 13 to move when the opening and closing assembly is in the disengaged state.

[0036] Optionally, in this embodiment, the second motor 15 is a reversible motor to drive the screw 13 to rotate forward or in reverse, thereby causing the counterweight 5 to move in opposite directions along the second direction D2.

[0037] like Figure 9 As shown, when the opening and closing components are in a transmission engagement state, multiple arc-shaped blocks 8 approach each other, and the inner sides of the multiple arc-shaped blocks 8 together form a threaded structure that engages with the screw 13, thereby establishing a transmission connection between the counterweight block 5 and the screw 13. Based on this, when the second motor 15 drives the screw 13 to rotate, the screw 13 can drive the counterweight block 5 to move along the second direction D2, thereby achieving the adjustment of the center of gravity of the raft 3.

[0038] like Figure 10 As shown, when the opening and closing assembly is in the disengaged state, the mounting hole 40 provides clearance space for the screw 13, and the multiple arc-shaped blocks 8 are in the separated position and form a clearance gap for the screw 13 to pass through. Therefore, the counterweight 5 can slide relative to the screw 13, and the screw 13 will not restrict the counterweight 5 from moving along the second direction D2.

[0039] Thus, the first motor 11 drives the opening and closing assembly to switch between the disengaged state and the transmission engagement state, and the second motor 15 drives the screw 13 to rotate, enabling the counterweight 5 to establish a transmission connection with the screw 13 when needed, and to slide freely relative to the screw 13 in the disengaged state, thereby taking into account both the free response capability of the counterweight 5 and the transmission stability during the center of gravity adjustment process.

[0040] In one embodiment, see Figure 3 and Figure 5 The triggering components include a first button switch 21 and a second button switch 22, which are respectively located on the inner sides of both ends of the slide 4 along its extension direction. When the counterweight 5 slides to a preset position on one side of the slide 4, it contacts the first button switch 21 to trigger the operation of the first motor 11 and the second motor 15; when the counterweight 5 slides to a preset position on the other side of the slide 4, it contacts the second button switch 22 to trigger the operation of the first motor 11 and the second motor 15.

[0041] After the first button switch 21 or the second button switch 22 is triggered, the first motor 11 drives the opening and closing assembly to switch the counterweight 5 and the screw 13 from a disengaged state to a transmission engagement state; the second motor 15 drives the screw 13 to rotate, thereby moving the counterweight 5 along the slide groove 4 in the opposite direction to its sliding direction, thereby adjusting the center of gravity of the raft 3.

[0042] In this embodiment, see Figure 3 The inner sides of both ends of the slide 4 can be provided with mounting grooves 20 respectively, and the first button switch 21 and the second button switch 22 are set in the mounting grooves 20.

[0043] Optionally, see Figure 3 The counterweight 5 is further provided with buffer members 39 at its two opposite ends along the second direction D2. The buffer members 39 are used to contact the button switch on the corresponding side when the counterweight 5 moves to the preset position, and to reduce the impact of the counterweight 5 on the switch. In this embodiment, the buffer member 39 is a rubber block. In other embodiments, the buffer member 39 may also be a sponge block or other components with a cushioning effect.

[0044] like Figure 3 As shown, a fourth groove 18 can also be opened on the raft 3 at a position between multiple sliding grooves 4. The fourth groove 18 is used to install the PLC controller 19.

[0045] Furthermore, such as Figure 3 As shown, the center of gravity adjustment mechanism may also include a PLC controller 19, which is installed in the fourth recess 18 and electrically connected to the trigger component to control the operation of the first motor 11 and the second motor 15 when the trigger component is triggered.

[0046] Specifically, the first push-button switch 21 and the second push-button switch 22 are electrically connected to the PLC controller 19, respectively, and are used to transmit a trigger signal to the PLC controller 19 when the push-button switch is triggered; the first motor 11 and the second motor 15 are electrically connected to the PLC controller 19, respectively, and are used to perform corresponding actions under the control of the PLC controller 19.

[0047] In one embodiment, the PLC controller 19 may also include a timing control program. For example, when the first button switch 21 is triggered, the PLC controller 19 controls the second motor 15 to rotate in a preset rotation direction for a preset time, and stops the second motor 15 after the preset time has elapsed, thereby controlling the moving distance of the counterweight 5 and preventing the second motor 15 from continuously driving the counterweight 5 to move. Similarly, when the second button switch 22 is triggered, the PLC controller 19 can control the second motor 15 to rotate in the opposite direction to the aforementioned preset rotation direction for a preset time.

[0048] like Figure 3 As shown, the center of gravity adjustment mechanism also includes a reset elastic element 17, which is connected between the raft 3 and the counterweight 5. The reset elastic element 17 provides a reset force after the counterweight 5 slides along the groove 4, so that the counterweight 5 returns to its original position. The reset elastic element 17 can be a spring, an elastic block, a spring sheet, or other structure capable of providing elastic restoring force. In this embodiment, the reset elastic element 17 is a spring.

[0049] It is understandable that when the raft 3 tilts and causes the counterweight 5 to slide along the groove 4, the reset elastic element 17 is compressed or stretched; after the counterweight 5 completes the center of gravity adjustment, the reset elastic element 17 provides a reset force to drive the counterweight 5 back to the initial position, so as to facilitate the response and adjustment again when tilting again.

[0050] like Figure 3 As shown, a third groove 16 is provided on the side of the raft 3 away from the second groove 14. The third groove 16 is used to accommodate the reset elastic member 17. In this embodiment, the third groove 16 consists of multiple grooves spaced apart along the first direction D1. The reset elastic member 17 is disposed in the third groove 16 and connected between the raft 3 and the counterweight 5.

[0051] The adjustment process of the raft vibration isolation device is described below with reference to an embodiment, taking the tilting of raft 3 to the left as an example.

[0052] When the floating raft vibration isolation device tilts to the left due to external disturbance, the overall center of gravity of the floating raft 3 shifts to the left, and the counterweight 5 slides to the left along the second direction D2 under its own weight. Since the opening and closing components are in a disengaged state in the initial state, the multiple arc-shaped blocks 8 are in a separated position, and the mounting hole 40 makes way for the screw 13, no transmission connection is established between the counterweight 5 and the screw 13, and the screw 13 does not restrict the counterweight 5 from sliding freely along the second direction D2. After the counterweight 5 slides to the preset position, the left end of the counterweight 5 or the buffer 39 on its left side contacts the first button switch 21, thereby triggering the first button switch 21 and transmitting the trigger signal to the PLC controller 19.

[0053] After receiving a trigger signal, the PLC controller 19 controls the first motor 11 to operate. The first motor 11 drives the worm gear 12 to rotate, which in turn drives the worm wheel 7 to rotate. The worm wheel 7 then drives multiple arc-shaped blocks 8 to rotate via the connecting rod 9, causing the multiple arc-shaped blocks 8 to switch from a disengaged position to a transmission engagement position. When the multiple arc-shaped blocks 8 switch to the transmission engagement position, the inner sides of the multiple arc-shaped blocks 8 together form a threaded structure that engages with the screw 13, thereby establishing a transmission connection between the counterweight 5 and the screw 13.

[0054] Based on this, the PLC controller 19 controls the second motor 15 to operate, the second motor 15 drives the screw 13 to rotate, and the screw 13 then drives the counterweight 5 to move to the right along the second direction D2, so as to change the overall weight distribution and center of gravity position of the raft 3, thereby compensating for the center of gravity shifting to the left.

[0055] Once the center of gravity of the raft 3 is adjusted to the target state, the PLC controller 19 controls the second motor 15 to stop operating and controls the first motor 11 to operate again, causing the multiple arc-shaped blocks 8 to switch from the transmission engagement position back to the disengaged position, thereby disengaging the transmission connection between the counterweight block 5 and the screw 13. Subsequently, under the restoring force provided by the reset elastic element 17, the counterweight block 5 returns to the initial area so that it can continue to respond and adjust in the next tilting event.

[0056] The adjustment process when the raft 3 tilts to the right is similar to the above process. The difference is that the counterweight 5 slides to the right along the second direction D2 and triggers the second button switch 22. The PLC controller 19 controls the first motor 11 and the second motor 15 to move in the corresponding direction to drive the counterweight 5 to move to the left along the second direction D2, thereby compensating for the rightward shift of the center of gravity.

[0057] In one embodiment, based on the above-mentioned center of gravity adjustment mechanism, the raft vibration isolation device may further include a reminder mechanism, which is linked to the counterweight 5 and is used to count and display the tilting action of the raft 3.

[0058] like Figure 11 and Figure 12 As shown, the reminder mechanism includes a take-up component, a one-way rotation component, and a display component. The take-up component is drivenly connected to the counterweight 5 and can convert the linear motion of the counterweight 5 into rotational motion. The one-way rotation component is located between the take-up component and the display component, and is drivenly connected to both the take-up component and the display component. The one-way rotation component is configured to output rotational motion when the output end of the take-up component rotates in a set direction. The display component is configured to count and display the number of rotational movements output by the one-way rotation component.

[0059] See Figure 12 and Figure 13 The actuating assembly includes a tooth 24, a gear 25, and a rotating shaft 37. The tooth 24 is located at the bottom of the counterweight 5, and the gear 25 is rotatably located on the side of the raft 3 and meshes with the tooth 24. The rotating shaft 37 is rotatably located on the side of the raft 3 and is torsionally connected to the gear 25 so as to drive the rotating shaft 37 to rotate when the counterweight 5 reciprocates.

[0060] In this embodiment, a fifth groove 23 is provided on the side of the raft 3. The fifth groove 23 is located to the side of one of the slide grooves 4 and is positioned opposite to the counterweight 5 in the slide groove 4. The gear 25 and the rotating shaft 37 can be disposed in the fifth groove 23 so that the gear 25 can mesh with the teeth 24 at the bottom of the counterweight 5. When the counterweight 5 reciprocates along the slide groove 4, the teeth 24 drive the gear 25 to rotate, and the gear 25 further drives the rotating shaft 37 to rotate synchronously, thereby converting the linear reciprocating movement of the counterweight 5 into the rotation of the rotating shaft 37.

[0061] Therefore, when the counterweight 5 reciprocates along the second direction D2, the teeth 24 at the bottom of the counterweight 5 drive the gear 25 to rotate, and the gear 25 further drives the rotating shaft 37 to rotate synchronously, thereby converting the linear motion of the counterweight 5 into rotational motion.

[0062] In this embodiment, the unidirectional rotation assembly includes an active plate 26 and a driven plate 28, used to convert the reciprocating rotation input from the drive assembly into unidirectional cumulative rotation. See also Figure 14 The active plate 26 is connected to the output end of the actuating component, and the driven plate 28 is connected to the input end of the display component. Specifically, the active plate 26 is located at the end of the rotating shaft 37 and connected to the rotating shaft 37 so as to rotate synchronously with the rotating shaft 37; the driven plate 28 is connected to the take-up shaft 27 so as to drive the take-up shaft 27 to rotate synchronously when the driven plate 28 rotates.

[0063] The driving plate 26 is located inside the driven plate 28 and is configured to cooperate with the driven plate 28 so that the driving plate 26 can rotate relative to the driven plate 28 in one rotation direction and drive the driven plate 28 to rotate in the opposite rotation direction, thereby realizing the one-way transmission cooperation between the driving plate 26 and the driven plate 28.

[0064] See Figures 15 to 17 The active plate 26 has multiple slots 29 spaced apart along its circumference. Each slot 29 is provided with a limiting spring 30 and a limiting ball 38. The limiting ball 38 is located on the opening side of the corresponding slot 29, and the limiting spring 30 is located on the bottom side of the corresponding slot 29. The limiting spring 30 is used to provide an elastic pushing force to the limiting ball 38 toward the outside of the active plate 26.

[0065] See Figure 17 The driven plate 28 has a plurality of ball grooves 31 spaced apart along the circumference to cooperate with the limiting ball 38, and each ball groove 31 is for the limiting ball 38 to be inserted. The driven plate 28 has a guide slope at the ball groove 31 so that the limiting ball 38 is limited to being in the ball groove 31 when the driving plate 26 rotates, or is disengaged from the ball groove 31 along the guide slope.

[0066] Furthermore, the driven plate 28 is also provided with a movable groove 32, and the outer periphery of the driving plate 26 is provided with a guide limiting part 33. The guide limiting part 33 is inserted into the movable groove 32 to guide and limit the relative rotation between the driving plate 26 and the driven plate 28 when the driving plate 26 rotates relative to the driven plate 28.

[0067] After assembly, the multiple limiting balls 38 selectively engage with the multiple ball grooves 31 under the elastic action of the limiting springs 30. When the driving plate 26 rotates in the first rotation direction, the limiting balls 38 can move along the guide slope and compress the limiting springs 30, causing the limiting balls 38 to disengage from the ball grooves 31. At this time, the driving plate 26 can rotate freely relative to the driven plate 28. When the driving plate 26 rotates in the second rotation direction opposite to the first rotation direction, the limiting balls 38 are limited to the ball grooves 31 under the action of the limiting springs 30, causing the driving plate 26 to drive the driven plate 28 to rotate synchronously. Thus, a unidirectional transmission engagement can be formed between the driving plate 26 and the driven plate 28.

[0068] See Figure 12 The display assembly includes a take-up shaft 27, a release shaft 34, a reminder tape 35, and an indicator rod 36, used to display the cumulative number of tilts of the raft 3. The take-up shaft 27 is rotatably mounted on the side of the raft 3 and connected to a driven plate 28 in a one-way rotation assembly, rotating synchronously with the driven plate 28. The release shaft 34 is rotatably mounted on one side of the take-up shaft 27 and spaced apart from it. The reminder tape 35 is wound between the take-up shaft 27 and the release shaft 34, with one end connected to the outer periphery of the take-up shaft 27 and the other part wound around the outer periphery of the release shaft 34. Thus, when the take-up shaft 27 rotates, the reminder tape 35 can be gradually released from the release shaft 34 side and wound around the outer periphery of the take-up shaft 27, thereby causing a change in position.

[0069] In one embodiment, the surface of the reminder tape 35 is provided with multiple markers spaced along its length. These markers can be sequentially numbered "1, 2, 3, 4, 5, ..., n" to indicate the cumulative number of tilts of the raft 3. An indicator rod 36 is fixedly mounted on the side wall of the raft 3 and located outside the reminder tape 35. As the reminder tape 35 moves, different markers pass sequentially by the indicator rod 36, which then indicates the corresponding marker, thus visually displaying the cumulative number of tilts.

[0070] Optionally, the reminder mechanism may also include a damping mechanism, which can be located at the take-up shaft 27 and the release shaft 34 to restrict the free rotation of the take-up shaft 27 and the release shaft 34. In this embodiment, the damping mechanism can be a damping shaft, a damping sleeve, or other structures that can provide rotational damping. By setting a damping mechanism, the reminder tape 35 can be prevented from unwinding, rewinding, or jumping without external force, thereby improving the stability and accuracy of the display.

[0071] The following example, showing raft 3 tilting to the left, illustrates the working process of the warning mechanism.

[0072] When the raft 3 tilts to the left, the counterweight 5 moves to the left along the second direction D2. The teeth 24 at the bottom of the counterweight 5 drive the gear 25 to rotate, and the gear 25 further drives the rotating shaft 37 and the driving plate 26 to rotate. Viewed from the side where the driven plate 28 is located, the driving plate 26 rotates clockwise at this time. In this direction of rotation, the limiting ball 38 moves along the guide ramp on the driven plate 28 and compresses the limiting spring 30, causing the driving plate 26 to idle relative to the driven plate 28 without driving the driven plate 28 to rotate.

[0073] After the center of gravity of the raft 3 is adjusted, the counterweight 5 moves in the opposite direction along the second direction D2, and the drive plate 26 rotates counterclockwise accordingly. At this time, the limiting ball 38 is embedded in the ball groove 31 under the action of the limiting spring 30, and the drive plate 26 drives the driven plate 28 and the winding shaft 27 to rotate. Thus, although the counterweight 5 moves back and forth along the second direction D2, the winding shaft 27 only rotates gradually in a single direction.

[0074] After the winding shaft 27 rotates, it drives the reminder tape 35 to gradually wind up, and the multiple markers on the reminder tape 35 move sequentially. The indicator rod 36 remains fixed, and the different markers move sequentially to the corresponding positions on the indicator rod 36, thereby realizing the cumulative display of the number of times the raft 3 tilts.

[0075] Through the above structure, the reminder mechanism can convert the reciprocating motion of the counterweight 5 into the unidirectional cumulative displacement of the reminder belt 35, thereby mechanically counting and visually displaying the tilting motion of the raft 3.

[0076] The present invention also provides a vessel, including a hull, a generator set, and the floating raft vibration isolation device described in the above embodiments. The mounting component 1 is connected to the hull, and the generator set is mounted on the floating raft 3. In this way, the vibration generated by the generator set can be transmitted to the hull via the floating raft 3, the vibration isolator 2, and the mounting component 1. The vibration isolator 2 can isolate and buffer the vibration transmission, thereby reducing the impact of the generator set's operating vibration on the hull.

[0077] When the ship tilts during navigation, the center of gravity adjustment mechanism in the floating raft vibration isolation device can adjust the center of gravity position of the floating raft 3 to improve the off-center load state of the generator set and the floating raft 3, and improve the operational stability of the generator set under dynamic tilting conditions.

[0078] The floating raft vibration isolation device provided by this invention, by setting a center of gravity adjustment mechanism, enables the counterweight 5 to automatically adjust its position when the device tilts, thereby compensating for the center of gravity of the floating raft 3, reducing off-center loading, and improving the force balance among the vibration isolators 2. Compared with existing schemes that rely on manual static adjustment, this invention can adapt to dynamic tilting conditions during operation, and can complete the center of gravity adjustment without real-time manual intervention, thus enhancing the stability of the device operation. Furthermore, this invention also includes a reminder mechanism linked to the counterweight 5, which can mechanically count and visually display tilting actions, thereby providing a reference for judging the device's operating status and subsequent maintenance analysis.

[0079] It is understood that in this invention, when the number of components or members is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of components or members shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not limiting, and can be understood as multiple, i.e., two or more; however, this does not mean that the invention excludes the case of one.

[0080] It should be understood that the above-described embodiments, examples, or examples are merely exemplary and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above-described embodiments, examples, or examples under the guidance of the present invention, without departing from the scope of the present invention.

Claims

1. A raft vibration isolation device, characterized in that, include: Installation component (1); Vibration isolator (2); A floating raft (3) is installed on the mounting component (1) via the vibration isolator (2), and a sliding groove (4) is provided inside the floating raft (3). The center of gravity adjustment mechanism is located inside the raft (3) and includes a counterweight (5), an opening and closing assembly, a screw (13), a trigger assembly, a first motor (11), and a second motor (15). The counterweight (5) is slidably disposed within the groove (4); The screw (13) is rotatably mounted on the slide (4) and passes through the counterweight (5); The opening and closing component is located on the counterweight (5) and is connected to the first motor (11) for switching between the counterweight (5) and the screw (13) in a disengaged state and a transmission engagement state. The second motor (15) is connected to the screw (13) in a transmission connection; The triggering component is located in the slide (4) and is used to be triggered when the raft (3) tilts and causes the counterweight (5) to slide to a preset position along the slide (4); wherein, when the triggering component is triggered, the first motor (11) drives the opening and closing component to switch the counterweight (5) and the screw (13) from a disengaged state to a transmission engagement state, and the second motor (15) drives the screw (13) to rotate, so as to drive the counterweight (5) to move along the slide (4) in a direction opposite to the sliding direction of the counterweight (5), thereby adjusting the center of gravity of the raft (3).

2. The floating raft vibration isolation device according to claim 1, characterized in that, The opening and closing assembly includes an opening and closing unit, which includes a worm gear (7), multiple arc blocks (8) and multiple connecting rods (9); the worm gear (7) is rotatably disposed inside the counterweight (5), and multiple arc blocks (8) are disposed on the inner side of the worm gear (7) and surround an opening and closing area for the screw (13) to pass through. The inner side of the arc blocks (8) is provided with a threaded structure that can be threadedly connected to the screw (13). Each arc block (8) is rotatably connected to the worm gear (7) through at least one connecting rod (9). The center of gravity adjustment mechanism also includes a worm (12), the first motor (11) is torsionally connected to the worm (12), the worm (12) extends along the extension direction of the slide groove (4) and meshes with the worm wheel (7).

3. The floating raft vibration isolation device according to claim 2, characterized in that, The opening and closing unit is provided in multiple ways, and the multiple opening and closing units are arranged at intervals along the extension direction of the slide groove (4); The worm (12) engages sequentially with the worm wheels (7) in the plurality of opening and closing units, so that when the first motor (11) drives the worm (12) to rotate, the plurality of worm wheels (7) rotate synchronously.

4. The raft vibration isolation device according to claim 1, characterized in that, The triggering component includes a first button switch (21) and a second button switch (22), wherein the first button switch (21) and the second button switch (22) are respectively disposed on the inner sides of both ends of the slide (4) along its extension direction; When the counterweight (5) slides to a preset position on one side of the slide groove (4), it contacts the first button switch (21) to trigger the first motor (11) and the second motor (15) to operate; when the counterweight (5) slides to a preset position on the other side of the slide groove (4), it contacts the second button switch (22) to trigger the first motor (11) and the second motor (15) to operate.

5. The raft vibration isolation device according to claim 1, characterized in that, The center of gravity adjustment mechanism also includes a reset elastic element (17), which is connected between the raft (3) and the counterweight (5) and is used to provide a reset force after the counterweight (5) slides along the groove (4).

6. The raft vibration isolation device according to claim 1, characterized in that, The raft vibration isolation device also includes a reminder mechanism, which is linked to the counterweight (5); The reminder mechanism includes a take-up component, a one-way rotation component and a display component. The take-up component is connected to the counterweight (5) and can convert the linear motion of the counterweight (5) into rotational motion. The one-way rotation component is disposed between the actuating component and the display component, and is connected to the actuating component and the display component respectively. The one-way rotation component is configured to output rotational motion when the output end of the actuating component rotates in a set direction. The display component is configured to count and display the number of rotational movements output by the unidirectional rotation component.

7. The raft vibration isolation device according to claim 6, characterized in that, The actuation assembly includes teeth (24), gears (25) and a rotating shaft (37); The teeth (24) are located at the bottom of the counterweight (5), the gear (25) is rotatably located on the side of the raft (3) and meshes with the teeth (24), and the shaft (37) is rotatably located on the side of the raft (3) and is anti-torsionally connected to the gear (25) so as to drive the shaft (37) to rotate when the counterweight (5) reciprocates.

8. The raft vibration isolation device according to claim 6, characterized in that, The unidirectional rotation assembly includes an active plate (26) and a driven plate (28); wherein the active plate (26) is connected to the output end of the actuation assembly, and the driven plate (28) is connected to the input end of the display assembly; The active plate (26) is located inside the driven plate (28) and is configured to cooperate with the driven plate (28) so that the active plate (26) rotates relative to the driven plate (28) in a preset rotation direction and drives the driven plate (28) to rotate in the opposite direction to the preset rotation direction.

9. The raft vibration isolation device according to claim 8, characterized in that, The active plate (26) is provided with a plurality of slots (29) spaced apart along the circumference, and each slot (29) is provided with a limiting spring (30) and a limiting ball (38). The driven plate (28) is provided with a plurality of ball grooves (31) that cooperate with the limiting ball (38) at circumferential intervals, and a guide slope is provided at the ball groove (31) so that the limiting ball (38) is limited to the ball groove (31) or disengaged from the ball groove (31) along the guide slope when the active plate (26) rotates.

10. A ship, characterized in that, It includes a hull, a generator set, and a floating raft vibration isolation device as described in any one of claims 1 to 9; wherein the mounting component (1) is connected to the hull, and the generator set is installed on the floating raft (3).

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