A vibration coupling suppression and damping device for marine diesel engines

Abstract

This invention relates to the field of vibration damping devices, and in particular to a vibration coupling suppression device for marine diesel engines. Its structure includes: a hydraulic vibration damping module, which comprises a guide vibration damping module, a pressure conversion module, and a bottom support module. The bottom support module includes a base with symmetrically arranged V-shaped guide rails. A vibration damping lifting module is installed at a corresponding position. The pressure conversion module has two pressure conversion blocks adapted to the V-shaped guide rails, with a rubber-plastic vibration damping module sandwiched between the two pressure conversion blocks. The vibration damping lifting module connects to the vibration damping oil chamber and the lifting oil chamber. The base has built-in oil circuits and valve seats, allowing for switching between vibration damping and lifting maintenance modes via oil circuit switching. The advantages include: an integrated independent hydraulic lifting structure, eliminating the need for external equipment; and the ability to independently replace the rubber-plastic vibration damping module with a small lifting amplitude. The device employs a multi-stage vibration damping combined with a symmetrical vibration counter-damping design of the pressure conversion blocks, along with V-shaped guide rails to suppress forward and backward vibrations, achieving multi-dimensional vibration coupling suppression.

Description

Technical Field

[0001] This invention is a vibration coupling suppression and damping device for marine diesel engines, belonging to the field of vibration damping devices. Background Technology

[0002] As the core of marine power, marine diesel engines generate continuous and large-amplitude vibrations during operation due to mechanical actions such as piston reciprocating motion and crankshaft rotation. If effective vibration reduction measures are not taken, the vibrations will be transmitted to the ship's hull through the base, which will not only cause resonance fatigue of the hull structure and affect the stability and safety of the ship's navigation, but also generate strong vibration noise, damage the working environment of the engine room, and accelerate the wear of diesel engine and auxiliary equipment components, reducing the overall service life of the equipment. Therefore, vibration suppression of marine diesel engines is a core and critical aspect of marine power system design.

[0003] Currently, the mainstream marine diesel engine uses a vibration damping device with rubber damping modules as the core to suppress vibration. This type of device uses the elastic deformation characteristics of rubber materials to absorb vibration energy. Through the structure of the rubber damping core combined with the metal shell, the vertical and lateral vibrations of the diesel engine are buffered and dissipated.

[0004] Existing marine diesel engine vibration damping devices are mostly integral assembly structures. The core rubber vibration damping component adopts a single upper and lower force-bearing design and is rigidly fixed to the device body and diesel engine base by multiple sets of bolts. When replacing it, due to the influence of the bolt installation position and structural constraints, the diesel engine body needs to be lifted to remove the bolt constraints and the vibration damping component bearing surface. This not only requires extremely high operating space but also relies on external lifting equipment. The lifting process is cumbersome, time-consuming, and labor-intensive. At the same time, the core rubber consumable component cannot be replaced independently. The entire vibration damping device must be disassembled simultaneously to complete the replacement. Moreover, frequent overall disassembly can easily cause secondary damage to the device connection structure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a vibration coupling suppression and damping device for marine diesel engines. This addresses the problem that most existing marine diesel engine vibration damping devices are integral assembly structures. The core rubber damping component employs a single top-bottom force-bearing design and is rigidly fixed to the device body and diesel engine base by multiple sets of bolts. During replacement, due to the bolt installation position and structural limitations, the diesel engine body must be lifted to remove it from the bolt constraints and the damping component's bearing surface. This not only requires extremely high operating space but also necessitates external lifting equipment, making the lifting process cumbersome, time-consuming, and labor-intensive. Furthermore, the core rubber consumable component cannot be replaced independently; the entire damping device must be disassembled simultaneously for replacement. Frequent overall disassembly can easily cause secondary damage to the device's connecting structure.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a vibration coupling suppression and damping device for marine diesel engines, comprising: a lower crossbeam base and an upper crossbeam base, wherein a plurality of symmetrically arranged hydraulic damping modules are arranged between the lower crossbeam base and the upper crossbeam base, wherein the hydraulic damping modules are arranged from top to bottom as a guide damping module, a pressure conversion module, and a bottom bearing module, wherein the bottom bearing module includes a base, wherein V-shaped guide rails are symmetrically provided on the base, wherein the pressure conversion module is equipped with two pressure conversion blocks adapted to the V-shaped guide rails, wherein a rubber and plastic damping module is sandwiched between the two pressure conversion blocks, and damping lifting modules are installed on the V-shaped guide rails of the bottom bearing module at positions corresponding to the two pressure conversion blocks, wherein the damping lifting modules are connected to a damping oil chamber and a lifting oil chamber; The vibration damping and lifting module switches between vibration damping and lifting maintenance modes via the oil circuit of the base. In vibration damping mode, the hydraulic vibration damping module supplies oil through the vibration damping oil circuit to dampen vibration, and the sliding cooperation between the pressure conversion block and the V-shaped guide rail achieves vibration suppression. In lifting maintenance mode, the valve seat switches to the lifting oil chamber for oil supply, and the lifting block pushes the pressure conversion block to achieve separate lifting, so as to complete the independent replacement of the rubber and plastic vibration damping module.

[0007] Preferably, the guide vibration damping module includes a guide slide rail, a connecting component, a main vibration damping spring, a square main vibration damping pad, and a vibration damping pad block. The guide slide rail of the guide vibration damping module is installed at the bottom of the upper crossbeam base after being buffered and supported by the square main vibration damping pad. A vibration damping pad block is provided at the bolt installation position between the guide slide rail and the upper crossbeam base. The vibration damping pad block is adapted to the nut support part after the bolt passes through the upper crossbeam base. The square main vibration damping pad has clearance holes adapted to the connecting member, and a main vibration damping spring is assembled between the connecting member and the upper crossbeam base.

[0008] Preferably, the pressure conversion module includes two symmetrically arranged pressure conversion blocks and a fastening cover. The top of the pressure conversion block is provided with a top sliding groove adapted to the guide slide rail. The guide slide rail forms a limiting constraint on the maximum left and right stroke of the two pressure conversion blocks. The side of the pressure conversion block facing the rubber and plastic vibration damping module is provided with a vibration transmission groove adapted to the vibration transmission block. The rubber-plastic vibration damping module is assembled between the vibration transmission grooves of two pressure conversion blocks. It includes symmetrically arranged vibration transmission blocks, rubber vibration damping cores, and metal shells. The rubber vibration damping cores are embedded in the metal shells. The two vibration transmission blocks are respectively embedded in the corresponding vibration transmission grooves and abut against the two ends of the rubber vibration damping cores. The fastening cover is detachably connected to the pressure conversion blocks to limit the rubber-plastic vibration damping module.

[0009] Preferably, the bottom support module further includes a symmetrically arranged vibration damping and lifting module, a hydraulic vibration damping module, and a hydraulic lifting module, and the base is the support base for the vibration damping and lifting module, the hydraulic vibration damping module, and the hydraulic lifting module; The base has symmetrically opened cylinder cavities corresponding to the V-shaped guide rail. The vibration damping and lifting module is slidably assembled in the cylinder cavity, and the tilt angle of the vibration damping and lifting module is adapted to the symmetrical tilt angle of the V-shaped guide rail. The vibration damping and lifting module includes a sealing ring, a top core block, and a rubber valve seat. The top core block is slidably assembled into the cylinder cavity through the sealing ring, and the rubber valve seat is fixedly installed on the head of the top core block.

[0010] Preferably, a lifting oil chamber is provided in the middle of the base. The lifting oil chamber is connected to the cylinder chambers arranged symmetrically on both sides through a lifting oil passage. A one-way valve is provided in the lifting oil passage to restrict the oil in the cylinder chamber from flowing back to the lifting oil chamber. A hydraulic lifting module is provided on one side of the base, and an oil storage chamber is opened inside the side of the base. The oil filling port of the oil storage chamber is sealed by a rubber sealing plug. The lifting oil chamber is connected to the hydraulic lifting module through an oil pressure pipeline, and the oil storage chamber is connected to the hydraulic lifting module through an oil supply line. The oil supply line is equipped with a one-way valve, which restricts the flow of external oil into the oil storage chamber.

[0011] Preferably, a damping oil chamber is provided in the middle of the base, and the damping oil chamber is connected to the cylinder chambers symmetrically arranged on both sides through a damping oil circuit. A hydraulic damping module is provided on one side of the base, and a damping cavity is provided inside the hydraulic damping module. A damping piston is slidably mounted inside the damping cavity along the vertical direction. A damping spring is mounted between the damping piston and the base. The damping oil chamber is connected to the damping cavity through the damping oil circuit. The overall diameter of the damping oil circuit is smaller than the diameter of the lifting oil circuit. A ball valve is provided in the middle of the damping oil circuit, and a valve seat switch is provided on the upper part of the ball valve.

[0012] Preferably, a pressure relief pipe is provided between the two symmetrically arranged cylinder chambers in the middle of the base. The middle of the pressure relief pipe is connected to a branch pipe, which extends to and is connected to the oil storage chamber. A ball valve is installed on the branch pipe. By opening the ball valve, the oil inside the two cylinder chambers can be discharged into the oil storage chamber through the pressure relief pipe and the branch pipe.

[0013] The vibration coupling suppression and damping device for marine diesel engines of the present invention has the following effects: 1. By integrating an independent hydraulic lifting module with a customized lifting rod, and using a V-shaped guide rail and a one-way valve oil circuit control design, the device eliminates the need for external lifting equipment. Only a small lifting motion is required to relieve the stress constraint on the rubber and plastic vibration damping module. This breaks the limitation of lifting the diesel engine when replacing traditional vibration damping devices. At the same time, the core rubber and plastic consumable parts can be replaced independently without disassembling the entire device, simplifying the replacement process, reducing operational difficulty and manpower and material consumption, achieving efficient and convenient maintenance of the vibration damping module, and improving equipment operation and maintenance efficiency.

[0014] 2. By adopting a multi-stage progressive vibration reduction structure that combines square main pads, vibration damping pads, main vibration damping springs, hydraulic vibration damping modules, and rubber-plastic vibration damping modules, the vibration damping piston and air compression damping in the hydraulic vibration damping module work together with the vibration damping spring to absorb and dissipate the vibration energy of the diesel engine layer by layer, weakening the vibration amplitude and intensity. Combined with the vibration absorption of the end rubber-plastic vibration damping module, a step-by-step suppression of diesel engine vibration is achieved.

[0015] 3. By symmetrically arranging the pressure conversion blocks and sandwiching the rubber and plastic vibration damping modules in them to form a vibration counter-damping structure, the residual vibration force that is not completely absorbed by the rubber and plastic vibration damping modules is counter-damped in the middle of the modules and eliminated. The small amount of vibration that is not counter-damped can also be transmitted to the opposite hydraulic vibration damping module for further damping, forming a closed-loop vibration damping process.

[0016] 4. By integrating the hydraulic jacking system with the hydraulic vibration damping module, the layout of the jacking oil circuit, oil supply oil circuit, and vibration damping oil circuit inside the base, as well as the one-way valve control logic, are optimized. This allows the device to perform both jacking maintenance and hydraulic vibration damping functions. At the same time, the symmetrical structural design and force distribution enhance the device's load-bearing capacity, making it suitable for the high load-bearing requirements of precision large marine diesel engines. This balances the device's vibration damping performance and load-bearing stability, improving the overall adaptability of the equipment.

[0017] 5. By installing V-shaped guide rails in the device, and in conjunction with the symmetrically arranged cylinder chambers, vibration damping lifting modules, and pressure conversion blocks, the device achieves the purpose of guiding and effectively suppressing the front-to-back vibrations generated by the diesel engine. The V-shaped guide structure can constrain the movement trajectory of the vibration damping lifting module, preventing it from deviating or jamming, while dispersing the front-to-back vibration load. This compensates for the shortcomings of traditional vibration damping devices in suppressing front-to-back vibrations, and also makes the lifting and resetting actions smoother. Combined with the device's multi-stage vibration damping, vibration counter-damping, and hydraulic damping structure, it achieves comprehensive coupling suppression of the diesel engine's vertical and front-to-back multi-dimensional vibrations, improving the overall vibration damping performance and structural stability of the device. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1This is a schematic diagram of the structure of a vibration coupling suppression and damping device for marine diesel engines according to the present invention.

[0019] Figure 2 This is a schematic diagram of the hydraulic vibration damping module of the present invention.

[0020] Figure 3 This is a schematic diagram of the exploded structure of the hydraulic vibration damping module of the present invention.

[0021] Figure 4 This is a perspective structural diagram of the vibration damping oil chamber and vibration damping oil circuit of the present invention.

[0022] Figure 5 This is a perspective structural diagram of the lifting oil chamber, lifting oil circuit, and hydraulic pipeline of the present invention.

[0023] Figure 6 This is a perspective structural diagram of the pressure relief pipeline and branch pipeline of the present invention.

[0024] Figure 7 This is a cross-sectional schematic diagram of the hydraulic vibration damping module of the present invention.

[0025] Explanation of reference numerals in the attached figures: 1. Lower crossbeam base; 2. Upper crossbeam base; 3. Hydraulic vibration damping module; 31. Guide and vibration damping module; 311. Guide slide rail; 312. Connecting component; 313. Main vibration damping spring; 314. Square main vibration damping pad; 3141. Clearance hole; 315. Vibration damping pad block; 32. Pressure conversion module; 321. Pressure conversion block; 3211. Top slide groove; 3212. Vibration transmission groove; 322. Fastening cover; 33. Bottom bearing module; 331. Base; 3311. V-shaped guide rail; 3312. Cylinder chamber; 3313. Lifting oil chamber; 33131. Lifting oil circuit; 33132. Hydraulic pipeline; 3315. Oil reservoir; 33151. Oil supply circuit; 3316. Vibration damping oil chamber; 33161. Vibration damping oil circuit; 3317. Vibration damping cavity; 3318. Pressure relief pipeline; 3319. Branch pipeline; 332. Vibration damping and lifting module; 3321. Sealing ring; 3322. Top core block; 3323. Rubber valve seat; 333. Hydraulic vibration damping module; 3331. Vibration damping piston; 3332. Vibration damping spring; 334. Hydraulic lifting module; 335. Check valve; 336. Rubber sealing plug; 337. Ball valve; 338. Valve seat switch; 34. Rubber and plastic vibration damping module; 341. Vibration transmission block; 342. Rubber vibration damping core; 343. Metal shell. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0027] Furthermore, in the description of this invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; 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. However, specifying a direct connection indicates that the two main bodies are not connected through a transitional structure, but rather formed as a whole through a connecting structure. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Please see Figures 1 to 7This invention provides a vibration coupling suppression and damping device for marine diesel engines. The technical solution includes: a base 331, on which a square main pad, a damping pad 315, and a main damping spring 3332 are mounted. Inside the base 331 are two symmetrically arranged cylinder chambers 3312, a lifting oil chamber 3313, and an oil storage / injection chamber. A pressure relief pipe 3318 connects the cylinder chambers 3312. A branch pipe 3319 is connected to the middle of the pressure relief pipe 3318 and communicates with the oil storage / injection chamber. A ball valve 337 is installed on the branch pipe 3319. The base 331 also includes a lifting oil passage 33131, an oil supply oil passage 33151, and a damping oil passage 33161, each with a corresponding one-way valve 335. A damping lifting module 332 is installed inside the cylinder chambers 3312, and the base 331 is equipped with a damping lifting module 332. V-shaped guide rail 311; pressure conversion block 321 is installed on the vibration damping lifting module 332, and a rubber and plastic vibration damping module 34 is sandwiched between the two pressure conversion blocks 321. Reusable vibration transmission blocks 341 are provided on both sides of the rubber and plastic vibration damping module 34. Fastening cover 322 and fastening bolts for limiting the rubber and plastic vibration damping module 34 are installed on the pressure conversion block 321; the base 331 also integrates a hydraulic lifting module 334 and a hydraulic vibration damping module 333. The hydraulic lifting module 334 is connected to the oil supply line 33151 and the lifting line 33131. The hydraulic vibration damping module 333 is provided with a vibration damping cavity 3317. The cavity is equipped with a vibration damping piston 3331 and a vibration damping spring. The hydraulic vibration damping module 333 is connected to the vibration damping cavity 3316 through the vibration damping oil line 33161. A ball valve 337 and a valve seat switch 338 are installed on the vibration damping oil line 33161.

[0031] Instructions for replacing the rubber and plastic vibration damping module 34: 1. Preparation and status check before replacement: All oil circuit cavities of this device must be kept full of oil before normal operation and replacement. Before replacing the rubber and plastic vibration damping module 34, a comprehensive inspection of the device's oil circuit system must be carried out to confirm that the oil circuit of the oil storage chamber 3315 is normal, the lifting oil circuit 33131 is full of oil without leakage, the vibration damping oil chamber 3316 is full of oil, the bottom of the vibration damping piston 3331 inside the vibration damping cavity 3317 of the hydraulic vibration damping module 333 is full of oil, and the oil supply circuit 33151 is not missing oil. Only after ensuring that each oil circuit cavity is in a normal working full oil state can the subsequent replacement operation be carried out.

[0032] 2. Hydraulic vibration damping module 333 disconnection operation: The first step of the replacement operation is to disconnect the hydraulic vibration damping module 333. By turning the valve seat switch 338 on the hydraulic vibration damping module 333, the ball valve 337 in the middle of the vibration damping oil circuit 33161 is completely closed, so that the oil circuit connection between the vibration damping oil chamber 3316 and the vibration damping chamber 3317 of the hydraulic vibration damping module 333 is completely cut off. At this time, the hydraulic vibration damping function of the entire device is completely disabled, so as to avoid the hydraulic vibration damping module 333 from taking a linkage action during the subsequent jacking operation, which would affect the stability of the replacement operation.

[0033] 3. Hydraulic Lifting Module 334 Assembly and Lifting Preparation: The hydraulic lifting module 334 of this device does not have a fixed lifting lever structure. It adopts a customized detachable lifting rod assembly design. When lifting operation is required, the customized lifting rod (a single main rod with several vertically parallel auxiliary rods welded on it) is inserted into the preset assembly position of the hydraulic lifting module 334 to ensure precise matching between the lifting rod and the hydraulic lifting module 334. By pressing down on a single main rod, the three auxiliary rods can be driven simultaneously to ensure the consistency of subsequent lifting actions. After the insertion is completed, the hydraulic lifting operation can be started.

[0034] 4. Hydraulic lifting operation and no-load state realization: By repeatedly pressing down on the customized lifting rod, the hydraulic lifting module 334 is driven to work. Under the cooperation and limiting action of the one-way valves 335 of the device, the oil in the oil storage chamber 3315 is transported to the hydraulic lifting module 334 through the oil supply circuit 33151, and then transferred from the hydraulic lifting module 334 to the lifting oil chamber 3313. The oil in the lifting oil chamber 3313 is evenly transmitted to the cylinder chambers 3312 on both sides of the base 331 through the lifting oil circuit 33131. This drives the vibration damping lifting module 332 in the cylinder chamber 3312 to lift upwards slightly along the V-shaped guide rail 311, and simultaneously drives the pressure conversion block 321 to move with the vibration damping lifting module 332.

[0035] During the lifting process, it is necessary to continuously observe the contact status between the pressure conversion block 321 and the rubber and plastic vibration damping module 34. Only a small lifting is required until the pressure conversion blocks 321 on both sides completely release the pressure on the rubber and plastic vibration damping module 34, so that the rubber and plastic vibration damping module 34 is in a loose state without load and constraint. Lifting can be stopped at this time, without lifting, to avoid excessive lifting that may cause damage to other structures of the device.

[0036] 5. Disassembly of rubber and plastic vibration damping module 34 and replacement of consumable parts: After the rubber and plastic vibration damping module 34 is in a no-load loose state, use a special tool to remove the fixing bolts of the fastening cover 322 above the pressure conversion block 321, remove the fastening cover 322, and then pull the rubber and plastic vibration damping module 34 horizontally to one side from the clamping position between the pressure conversion blocks 321 to complete the disassembly.

[0037] After disassembly, inspect the appearance and structural condition of the metal vibration transmission block 341. The vibration transmission block 341 is a reusable component. If there is no deformation, cracks or other damage, it can be directly retained. Only the failed rubber damping core 342 and metal shell 343 are replaced as consumable parts. Replace them with brand new rubber damping core 342 and metal shell 343 to complete the replacement of consumable parts.

[0038] 6. Reset, install and limit the rubber and plastic vibration damping module 34: Set the reserved metal vibration transmission blocks 341 symmetrically on both sides of the newly replaced rubber and plastic vibration damping module 34, and then snap the assembled rubber and plastic vibration damping module 34 and vibration transmission blocks 341 back into the preset transmission groove between the pressure conversion block 321 to ensure that the module and vibration transmission blocks 341 are accurately aligned and tightly fitted.

[0039] After the clamping is completed, the fastening cover 322 is reset to the mounting position above the pressure conversion block 321, the fastening bolt is inserted and tightened with a tool. The fastening cover 322 is used to limit the axial and radial movement of the rubber and plastic vibration damping module 34, ensuring the structural stability of the module after installation and preventing displacement or loosening during subsequent operation of the device.

[0040] 7. Lifting Pressure Release and Device Reset: After the rubber and plastic vibration damping module 34 is reset and fixed, the lifting pressure release and device reset operation can be carried out: First, open the ball valve 337 on the branch pipe 3319 through the valve seat switch 338, and then slowly release the lifting pressure of the hydraulic lifting module 334. At this time, the oil in the cylinder chamber 3312, under the action of the device's own gravity, is collected through the pressure relief pipe 3318 between the two cylinder chambers 3312 in the middle of the base 331, and discharged into the oil storage chamber 3315 through the branch pipe 3319 connecting the oil storage chamber 3315. As the oil gradually flows back, the vibration damping lifting module 332 falls slowly along the V-shaped guide rail 311 with the oil. The pressure conversion block 321 is reset synchronously and re-fits tightly with the newly replaced rubber and plastic vibration damping module 34. The device's own gravity and working pressure are gradually and evenly applied to the rubber and plastic vibration damping module 34, completing the module's force reset. After the pressure is fully released and the device is reset, close the ball valve 337 on the branch line 3319. After the pressure is fully released, press down under the control of the customized lifting rod to inject a certain amount of oil into the two cylinder chambers 3312. The amount of oil injected is precisely controlled so that the rubber and plastic vibration damping module 34 will not lose its pressure and vibration damping function. The rubber and plastic vibration damping module 34 and the hydraulic vibration damping module 333 maintain normal working condition, and only provide the necessary pressure transmission foundation for the hydraulic vibration damping module 333. This avoids the cylinder chamber 3312 being without oil, which would affect the normal operation of the subsequent device. After the oil injection is completed, remove the customized lifting rod from the hydraulic lifting module 334 and store it properly to prepare for the normal operation of the subsequent device and the next maintenance operation.

[0041] 8. Hydraulic damping module 333 restoration operation: Finally, turn the valve seat switch 338 on the damping oil circuit 33161 in the opposite direction to fully open the ball valve 337 in the middle of the damping oil circuit 33161, restore the oil circuit connection between the damping oil chamber 3316 and the damping chamber 3317 of the hydraulic damping module 333, and restore the hydraulic damping function of the device to normal working condition. At this point, the entire replacement operation of the rubber and plastic damping module 34 is completed, and the device can be put into normal operation.

[0042] Structural Assembly and Guiding Limitation Description: This device forms a stable load-bearing frame through the lower crossbeam base 1 and the upper crossbeam base 2. The hydraulic vibration damping module 3 is symmetrically arranged between the two bases. A V-shaped guide rail 3311 is provided on the base 331 of the bottom load-bearing module 33 to provide precise guiding constraints for the pressure conversion block 321. The pressure conversion block 321 has a top sliding groove 3211 on its top, which forms a sliding fit with the guide rail 311. A vibration transmission groove 3212 is provided on the inner side for installing the vibration transmission block 341 and the rubber and plastic vibration damping module 34. The vibration damping lifting module 332 has a built-in sealing ring 3321, a top core block 3322 and a rubber valve seat 3323 to ensure oil circuit sealing and smooth lifting. The oil filling port of the oil storage chamber 3315 is sealed with a rubber sealing plug 336. The hydraulic pipeline 33132 realizes reliable communication between the hydraulic lifting module 334 and the lifting oil chamber 3313. The overall structure is compactly assembled, accurately guided and reliably sealed.

[0043] Operating mode switching and hydraulic circuit coordination: When the device switches between vibration reduction and jacking maintenance operating modes, the hydraulic vibration reduction module 3 relies on the hydraulic circuit system of the bottom bearing module 33 to realize the function conversion. The V-shaped guide rail 3311 and the top sliding groove 3211 ensure smooth movement. The vibration transmission groove 3212 continuously ensures stable vibration transmission. The hydraulic pipeline 33132 provides pressure oil source for the jacking oil circuit 33131. The sealing ring 3321 and the rubber valve seat 3323 prevent oil leakage. The top core block 3322 realizes jacking and resetting under hydraulic pressure. The rubber sealing plug 336 ensures that the oil storage chamber 3315 is sealed for a long time without oil leakage. All components work together to enable the device to have both efficient vibration reduction and convenient maintenance capabilities.

[0044] Explanation of the assembly, fixing, and vibration absorption principle of the guide vibration damping module 31: As the core connection between the device and the upper crossbeam base 2 and the primary vibration damping unit, the assembly, fixing, and vibration absorption design of the guide vibration damping module 31 revolves around "tight support plus multi-level buffering". The specific implementation method is as follows: The upper crossbeam base 2 completes the integrated fastening installation of the guide slide rail 311, the square main vibration damping pad 314, and the vibration damping pad block 315 through the cooperation of through bolts and nuts. After the bolts are sequentially passed through the upper crossbeam base 2, the vibration damping pad block 315, and the square main vibration damping pad 314, they are locked and fixed with the preset mounting holes of the guide slide rail 311. The vibration damping pad block 315 is placed on the nut support part at the top of the upper crossbeam base 2, and the square main vibration damping pad 314 is sandwiched between the bottom of the upper crossbeam base 2 and the guide slide rail 311. The pre-tightening force of the bolts forms a stable assembly relationship, which not only ensures the installation positioning accuracy of the guide slide rail 311, but also provides reliable load-bearing support through the pre-compression state of the elastic component. To avoid rigid contact vibration transmission caused by bolt tightening, the square main vibration damping pad 314 has clearance holes 3141 at the installation position of the connecting member 312, ensuring that the connection between the connecting member 312 and the guide rail 311 is not interfered with. Simultaneously, its own elastic deformation buffers the direct vibration transmission between the upper beam base 2 and the guide rail 311. The vibration absorption process is achieved through multi-stage synergy: when the vibration generated by the marine diesel engine is transmitted to the guide rail 311, the square main vibration damping pad 314 first provides primary buffering, absorbing some high-frequency micro-vibrations through the elastic deformation of its rubber-based material, thus weakening the initial transmission intensity of the vibration. Subsequently, the vibration force of the guide rail 311 is transmitted to the main vibration damping spring 313 through the connecting member 312, and the main vibration damping spring 313, through its own extension... The shrinkage deformation provides secondary buffering and energy dissipation for the vibration force. The elastic restoring force of the spring forms a vibration force counteracting, effectively attenuating the vibration amplitude transmitted from the guide rail 311 to the upper crossbeam base 2. Meanwhile, the vibration damping pad 315 buffers the local vibration of the bolt pre-tightening part through its own elastic characteristics, avoiding the vibration amplification caused by hard contact between the nut and the upper crossbeam base 2. The entire design not only ensures the installation stability and load-bearing reliability of the guide vibration damping module 31 through bolt fastening, but also achieves layered absorption and dissipation of vibration force through the three-level vibration damping structure of "square main vibration damping pad 314 plus main vibration damping spring 313 plus vibration damping pad 315". Finally, in conjunction with the rubber and plastic vibration damping module 34 and the hydraulic vibration damping module 333 of the central pressure conversion module 32, a full-link vibration coupling suppression effect is formed.

[0045] Explanation of the principle of multi-stage vibration reduction and vibration offset elimination: This device adopts a composite vibration reduction structure design with multi-stage progressive vibration reduction and end symmetrical offset elimination to achieve full-process, high-efficiency suppression of diesel engine vibration; the vibration generated by the diesel engine is first transmitted to the square main pad, vibration damping pad 315 and main vibration damping spring 3332. This hierarchical structure will absorb and dissipate most of the vibration energy first, completing the first layer of vibration damping buffer. The residual vibration after the initial damping is transmitted to the hydraulic damping module 333. The vibration load drives the damping piston 3331 in the damping cavity 3317 to slide up and down. During the piston's movement, the air in its cavity is rapidly compressed, forming an air damping force that increases with the amount of compression. This force works synergistically with the elastic buffering force of the damping spring, completing the second stage of vibration reduction through the effect of "air compression damping plus spring elastic damping," weakening the amplitude and intensity of the vibration. The residual vibration after being processed by the hydraulic damping module 333 is finally transmitted to the rubber and plastic damping module 34 sandwiched between the pressure conversion blocks 321 on both sides. This module directly absorbs and reduces the residual vibration, completing the third stage of damping. If the vibration force exceeds the rubber... The single absorption threshold of the plastic vibration damping module 34 means that any vibrations not completely eliminated will be transmitted in the opposite direction to the pressure conversion blocks 321 on both sides of the module. Utilizing the symmetrical counter-damping design of the device, the residual vibration force transmitted in the opposite direction on both sides forms a strong counter-damping force in the middle of the plastic vibration damping module 34, thereby eliminating the end vibration. The slight vibrations that are not completely counter-damped will be further transmitted to the hydraulic vibration damping module 333 on the opposite side. Through the air compression damping and vibration damping spring of this module, the vibration is damped and eliminated again, forming a closed-loop vibration damping process of "multi-stage absorption to end counter-damping to reverse vibration damping". This ensures that the vibration generated by the diesel engine is suppressed throughout the entire process without any dead angles. Compared with the traditional single vibration damping structure, this design improves the device's ability to suppress complex vibrations.

[0046] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibration coupling suppression and damping device for marine diesel engines, comprising a lower crossbeam base (1) and an upper crossbeam base (2), characterized in that: Several symmetrically arranged hydraulic vibration damping modules (3) are arranged between the lower crossbeam base (1) and the upper crossbeam base (2). The hydraulic vibration damping modules (3) are arranged from top to bottom as a guide vibration damping module (31), a pressure conversion module (32), and a bottom bearing module (33). The bottom bearing module (33) includes a base (331). V-shaped guide rails (3311) are symmetrically opened on the base (331). The pressure conversion module (32) is equipped with two pressure conversion blocks (321) that are adapted to the V-shaped guide rails (3311). A rubber and plastic vibration damping module (34) is sandwiched between the two pressure conversion blocks (321). Vibration damping lifting modules (332) are installed on the V-shaped guide rails (3311) of the bottom bearing module (33) at positions corresponding to the two pressure conversion blocks (321). The vibration damping lifting module (332) is connected to a vibration damping oil chamber (3316) and a lifting oil chamber (3313). The vibration damping and lifting module (332) switches between vibration damping and lifting maintenance modes by switching the oil circuit of the base (331). In the vibration damping mode, the hydraulic vibration damping module (333) supplies oil for vibration damping through the vibration damping oil circuit (33161), and the vibration is suppressed by the sliding cooperation between the pressure conversion block (321) and the V-shaped guide rail (3311). In the lifting maintenance mode, the valve seat switches to the lifting oil chamber (3313) for oil supply, and the pressure conversion block (321) is pushed by the lifting block to achieve separate lifting, so as to complete the independent replacement of the rubber and plastic vibration damping module (34). The guide vibration damping module (31) includes a guide slide rail (311), a connecting component (312), a main vibration damping spring (313), a square main vibration damping pad (314), and a vibration damping pad block (315). The guide slide rail (311) of the guide vibration damping module (31) is installed at the bottom of the upper crossbeam base (2) after being buffered and supported by the square main vibration damping pad (314). A vibration damping pad block (315) is provided at the bolt installation position of the guide slide rail (311) and the upper crossbeam base (2). The vibration damping pad block (315) is adapted to the nut support part after the bolt passes through the upper crossbeam base (2). The square main damping pad (314) has a clearance hole (3141) that is compatible with the connecting member (312), and a main damping spring (313) is assembled between the connecting member (312) and the upper beam base (2).

2. The vibration coupling suppression and damping device for marine diesel engines according to claim 1, characterized in that: The pressure conversion module (32) includes two symmetrically arranged pressure conversion blocks (321) and a fastening cover (322). The top of the pressure conversion block (321) is provided with a top sliding groove (3211) that is adapted to the guide slide rail (311). The guide slide rail (311) forms a limit constraint on the maximum left and right stroke of the two pressure conversion blocks (321). The side of the pressure conversion block (321) facing the rubber and plastic vibration damping module (34) is provided with a vibration transmission groove (3212) that is adapted to the vibration transmission block (341). The rubber-plastic vibration damping module (34) is assembled between the vibration transmission grooves (3212) of two pressure conversion blocks (321), including symmetrically arranged vibration transmission blocks (341), rubber vibration damping cores (342), and metal shells (343). The rubber vibration damping cores (342) are embedded in the metal shells (343). The two vibration transmission blocks (341) are respectively embedded in the corresponding vibration transmission grooves (3212) and abut against the two ends of the rubber vibration damping cores (342). The fastening cover (322) is detachably connected to the pressure conversion blocks (321) to limit the rubber-plastic vibration damping module (34).

3. The vibration coupling suppression and damping device for marine diesel engines according to claim 1, characterized in that: The bottom support module (33) also includes a symmetrically arranged vibration damping and lifting module (332), a hydraulic vibration damping module (333), and a hydraulic lifting module (334), and the base (331) is the support base of the vibration damping and lifting module (332), the hydraulic vibration damping module (333), and the hydraulic lifting module (334); The base (331) is symmetrically provided with cylinder cavities (3312) at positions corresponding to the V-shaped guide rail (3311). The vibration damping and lifting module (332) is slidably assembled in the cylinder cavity (3312), and the arrangement tilt angle of the vibration damping and lifting module (332) is adapted to the symmetrical tilt angle of the V-shaped guide rail (3311). The vibration damping lifting module (332) includes a sealing ring (3321), a top core block (3322), and a rubber valve seat (3323). The top core block (3322) is slidably assembled in the cylinder cavity (3312) through the sealing ring (3321), and the rubber valve seat (3323) is fixedly installed on the head of the top core block (3322).

4. The vibration coupling suppression and damping device for marine diesel engines according to claim 1, characterized in that: The base (331) has a lifting oil chamber (3313) in the middle. The lifting oil chamber (3313) is connected to the cylinder chambers (3312) arranged symmetrically on both sides through the lifting oil passage (33131). The lifting oil passage (33131) is provided with a one-way valve (335). The one-way valve (335) restricts the oil in the cylinder chamber (3312) from flowing back to the lifting oil chamber (3313). A hydraulic lifting module (334) is provided on one side of the base (331), and an oil storage chamber (3315) is opened inside one side of the base (331). The oil filling port of the oil storage chamber (3315) is sealed by a rubber sealing plug (336). The lifting oil chamber (3313) is connected to the hydraulic lifting module (334) through the oil pressure pipeline (33132), and the oil storage chamber (3315) is connected to the hydraulic lifting module (334) through the oil supply line (33151). The oil supply line (33151) is equipped with a one-way valve (335), which restricts the flow of external oil into the oil storage chamber (3315).

5. The vibration coupling suppression and damping device for marine diesel engines according to claim 1, characterized in that: The base (331) has a damping oil chamber (3316) in the middle. The damping oil chamber (3316) is connected to the cylinder chambers (3312) arranged symmetrically on both sides through a damping oil passage (33161). The base (331) has a hydraulic damping module (333) on one side. The hydraulic damping module (333) has a damping cavity (3317) inside. The damping cavity (3317) is equipped with a damping piston (3331) that slides vertically inside. A damping spring (3332) is installed between the damping piston (3331) and the base (331). The damping oil cavity (3316) and the damping cavity (3317) are connected through the damping oil passage (33161). The overall diameter of the damping oil passage (33161) is smaller than the diameter of the lifting oil passage (33131). A ball valve (337) is provided in the middle of the damping oil passage (33161). A valve seat switch (338) is provided on the upper part of the ball valve (337).

6. The vibration coupling suppression and damping device for marine diesel engines according to claim 1, characterized in that: A pressure relief pipe (3318) is provided between two symmetrically arranged cylinder chambers (3312) in the middle of the base (331). A branch pipe (3319) is connected to the middle of the pressure relief pipe (3318). The branch pipe (3319) extends to the oil storage chamber (3315) and is connected to the oil storage chamber (3315). A ball valve (337) is installed on the branch pipe (3319). By opening the ball valve (337), the oil inside the two cylinder chambers (3312) can be discharged into the oil storage chamber (3315) through the pressure relief pipe (3318) and the branch pipe (3319).

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