A dynamic vibration damping device for use in the lubrication pipeline system of a gear transmission device

Abstract

A dynamic vibration damping device for use in the lubricating oil pipeline system of a gear transmission device relates to the field of vibration control technology for marine power units. This invention solves the problem of resonance caused by fluid pressure pulsation in the lubricating oil pipeline of a gear transmission device, a problem that is difficult to effectively address with existing technologies. The invention includes a base (1), a top cover (2), a clamp (3), and damping particles (4) filled within a closed cavity formed by the base (1) and the top cover (2). The clamp (3) secures the base (1) and the top cover (2) to the outer wall of the lubricating oil pipeline (5) of the gear transmission device and transmits the vibration of the lubricating oil pipeline (5) to the closed cavity. The dynamic vibration damping device is preferably placed in an area with significant vibration and ample space. Under the action of pipeline vibration, the damping particles inside the dynamic vibration damping device dissipate vibration energy through collision and friction. This invention is used for the effective control of vibration in the lubricating oil pipeline of a gear transmission device.

Description

Technical Field

[0001] This invention belongs to the field of vibration control technology for marine power units, specifically relating to a power vibration damping device applied to the lubricating oil pipeline system of a gear transmission device, used to reduce vibration in the lubricating oil pipeline system of the gear transmission device. Background Technology

[0002] Gear transmission devices, due to their advantages of high power density, compact structure, and precise transmission ratio, have become key equipment in ship propulsion systems. With the continuous improvement of ship performance requirements, the demands for vibration and noise control and safety reliability of mechanical equipment are becoming increasingly stringent. During operation, air can easily mix with the lubricating oil in gear transmission devices, forming an air-laden oil mixture. When this oil enters the high-pressure chamber of the motor-driven pump, the air bubbles are violently compressed and may even burst under high pressure, generating micro-jet streams and shock waves, resulting in significant fluid pressure pulsations in the motor-driven pump. The excitation frequency of these pressure pulsations is likely to be close to the natural frequency of the motor-driven pump outlet auxiliary pipeline and system pipelines after coupling, thus triggering pipeline resonance. This leads to excessive vibration in the lubricating oil pipelines, posing a risk of weld cracking and seriously threatening the system's safety, stability, and low-noise operation.

[0003] Currently, traditional control methods for pipeline vibration mainly rely on elastic pipe clamps or applying damping layers to the pipe wall surface. However, these measures often have limited vibration reduction effects on resonance problems caused by internal fluid pressure pulsations, making it difficult to meet increasingly stringent vibration and noise control requirements.

[0004] Particle damping technology, as an effective vibration control method, has advantages such as minimal installation limitations, low cost, good environmental adaptability, resistance to high temperatures, high pressures, and corrosion, minimal impact on the original characteristics of the system, and long service life. Its vibration reduction effect mainly relies on the inelastic collisions and friction between damping particles and between the damping particles and the cavity wall to dissipate energy. Although particle damping technology has been applied in other fields, in the specific scenario of lubricating oil pipelines in gear transmission devices, there is a lack of dedicated structural designs optimized for the pipeline vibration characteristics. Existing particle damping devices do not consider the special requirements of lubricating oil pipelines in terms of particle parameter selection, installation methods, and structural forms, resulting in suboptimal vibration reduction effects.

[0005] In summary, existing technologies are insufficient to effectively solve the resonance problem caused by fluid pressure pulsation in the lubricating oil lines of gear transmission devices. Summary of the Invention

[0006] The purpose of this invention is to solve the problem of resonance caused by fluid pressure pulsation in the lubrication lines of gear transmission devices, which is difficult to effectively address with existing technologies. Therefore, this invention provides a dynamic vibration damping device for use in the lubrication lines of gear transmission devices.

[0007] The technical solution of this invention is:

[0008] A power vibration damping device for use in a gear transmission device lubricating oil pipeline system includes a base, a top cover, a clamp, and damping particles filled in a closed cavity formed by the base and the top cover; the clamp is used to fasten the base and the top cover to the outer wall of the gear transmission device lubricating oil pipeline and transmit the vibration of the lubricating oil pipeline to the closed cavity.

[0009] Furthermore, the mounting surfaces of the base and top cover that contact the outer wall of the lubricating oil pipeline are semi-circular arc surfaces, so that the dynamic vibration damping device can fit tightly with lubricating oil pipelines of different diameters.

[0010] Furthermore, the damping particles are made of iron-based alloys, which form a force chain network during collisions.

[0011] Furthermore, the damping particles are filled to a rate of 85% to 98% within the enclosed cavity, so that the particles are in an elastic flow state in which they can easily form a stable force chain network and undergo intense friction and collision.

[0012] Preferably, the damping particles have a particle size of 0.1 mm to 5 mm to achieve a balance between energy dissipation in a single collision and the frequency of collisions between particles.

[0013] Preferably, the iron-based alloy particles are made of high-carbon chromium bearing steel.

[0014] Furthermore, the clamp is connected and secured to the base and top cover via bolt and nut assemblies to facilitate the installation and disassembly of the power vibration damping device.

[0015] Furthermore, the damping particles are made of polymer materials with a particle size of 0.05 mm to 1 mm to adapt to different vibration characteristics and installation space constraints.

[0016] Furthermore, the dynamic vibration damping device is arranged in the lubricating oil pipeline at the point of maximum vibration response caused by the pulsating excitation of fluid pressure from the pump.

[0017] Preferably, the base and the top cover are made of high-strength aluminum alloy to reduce the overall weight of the device while ensuring structural rigidity.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. The dynamic vibration damping device provided by this invention effectively solves the resonance problem caused by fluid pressure pulsation in the lubricating oil pipeline of a gear transmission device. Specifically, this invention employs particle damping as the core vibration reduction mechanism. By filling a closed cavity with damping particles of specific parameters, the vibration energy of the pipeline is converted into heat dissipation through inelastic collisions and friction between the particles, achieving the effect of controlling vibration from the energy source. Compared with traditional elastic pipe clamp constraints or surface damping layer treatment, this method is more direct and effective in suppressing broadband vibrations and significantly reduces resonance peak values.

[0020] 2. This invention possesses excellent broadband vibration absorption capability: By employing high-density iron-based alloy particles and controlling their filling rate within an optimized range of 85% to 98%, this invention enables the particle system to form a continuously evolving force chain network under vibration excitation. This nonlinear dynamic characteristic allows the device to not only function at specific resonant frequencies but also maintain efficient energy consumption characteristics over a wide frequency range, perfectly adapting to the complex pressure pulsation spectrum in lubricating oil pipeline systems.

[0021] 3. This invention employs a split base and top cover design combined with a clamp fastening method, allowing installation to be completed without modifying existing pipelines. The semi-circular arc-shaped contact structure ensures a tight fit with pipelines of different diameters, while the fully enclosed cavity design effectively prevents particle leakage and external contamination. The use of metal damping particles ensures the long-term stability of the device under harsh conditions such as high temperatures and oil contamination, greatly improving the reliability of the equipment.

[0022] 4. This invention offers excellent parameter adjustability, providing optimization space for different vibration conditions. By adjusting key parameters such as the material, particle size, and filling rate of the damping particles, precise control of vibration in specific pipeline systems can be achieved. For example, setting the particle size of the iron-based alloy particles to 2 mm and the filling rate to 95% has been experimentally verified to achieve the best vibration reduction effect. This flexible design concept allows the device to adapt to diverse engineering application needs.

[0023] In summary, this invention creatively applies particulate damping technology to lubricating oil pipeline systems, combined with a specially designed installation structure and optimized technical parameters, resulting in a highly efficient, reliable, and easy-to-implement vibration control solution. This device not only effectively suppresses pipeline resonance and improves system safety, but also provides a new technical approach for vibration reduction and noise reduction in marine power plants. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Perspective view; Figure 3 This describes the energy consumption patterns of different particle materials; Figure 4This shows the energy consumption patterns under different filling rates, where 'a' represents the relationship between different filling rates and energy consumption for iron-based alloys; and 'b' represents the relationship between different filling rates and energy consumption for polymer materials. Figure 5 This represents the energy consumption pattern under different particle sizes, where a represents the relationship between different particle sizes per unit / mm for iron-based alloys and energy consumption; b represents the relationship between different particle sizes per unit / mm for polymer materials. Figure 6 This is a diagram of the on-site installation of the dynamic vibration damping device.

[0025] In the diagram: 1. Base, 2. Top cover, 3. Clamp, 4. Damping particles, 5. Lubricating oil pipeline. Detailed Implementation

[0026] Specific implementation method one: Combining Figures 1 to 6 This embodiment includes a base 1, a top cover 2, a clamp 3, and damping particles 4 filled in a closed cavity formed by the base 1 and the top cover 2. The clamp 3 is used to fasten the base 1 and the top cover 2 to the outer wall of the lubricating oil pipeline 5 of the gear transmission device and to transmit the vibration of the lubricating oil pipeline 5 to the closed cavity.

[0027] The dynamic vibration absorption device of the present invention converts pipeline vibration energy into heat energy, significantly reducing pipeline vibration. It provides a solution to the problem of excessive vibration in the auxiliary lubricating oil pipeline of the gear transmission system, and can further improve the safety and vibration reduction and noise reduction level of the auxiliary lubricating oil pipeline of the gear transmission system.

[0028] The vibration absorption principle of the present invention is as follows: When the lubricating oil pipeline 5 of the gear transmission device vibrates, the vibration is transmitted to the base 1 and the upper cover 2 of the power vibration absorption device through the clamp 3. The damping particles 4 filled in the closed cavity of the base 1 and the upper cover 2 generate high-frequency relative motion with the cavity wall and the damping particles 4 due to the action of inertial force, resulting in inelastic collision. Part of the kinetic energy is converted into heat energy and conducted to the environment through the base 1 and the upper cover 2.

[0029] The present invention uses damping particles to fill the cavity of the power vibration-absorbing base and the upper cover. The material, particle size, and filling rate of the damping particles can be adjusted according to the vibration of the auxiliary lubricating oil pipeline of the gear transmission system to achieve different vibration reduction effects. The power transmission device is fixed to the location of the gear transmission system's auxiliary lubricating oil pipeline where vibration is significant by clamps. When the auxiliary lubricating oil pipeline of the gear transmission system vibrates, the vibration is transmitted to the power vibration-absorbing device base and the upper cover through the clamps, causing the damping particles inside the power vibration-absorbing device base and the upper cover to vibrate and move, generating inelastic collisions. This converts some kinetic energy into heat energy, effectively reducing the vibration of the auxiliary lubricating oil pipeline of the gear transmission system and realizing the vibration reduction design of the gear transmission system.

[0030] In this invention, the material, particle size, and filling rate of the particle damping are the main factors affecting the energy consumption of the dynamic vibration absorption device. Particles of different materials have different densities and coefficients of restitution. The difference in particle density determines the magnitude of the force chain during collision, while the different coefficients of restitution determine the frequency of force chain breakage and reorganization after particle collision. Therefore, it is necessary to perform particle damping parameter calculations based on the vibration conditions of the gear transmission system's auxiliary lubrication pipeline system to obtain the optimal particle damping parameters.

[0031] The material composition of damping particles is one of the most important factors affecting their damping effect. For damping particles, there are four main influencing factors: particle density, particle shear modulus, Poisson's ratio, and particle coefficient of restitution. Different shear moduli, coefficients of restitution, and Poisson's ratios correspond to different damping effects. Using particles made of three materials—iron-based alloy A, ceramic-based B, and polymer material C—the energy dissipation values ​​of different materials were calculated by changing the particle material. Based on the vibration characteristics of the gear transmission system's auxiliary lubrication pipeline system, particles of different materials were excited, and the energy dissipation statistics are as follows: Figure 3 As shown. Figure 3 Iron-based alloys have the best energy efficiency.

[0032] The core of particle filling rate variation lies in the change of particle flow regime. The process of particles changing from low to high filling rate is essentially a change from inertial flow to elastic flow. For inertial flow with low particle filling concentration or relatively smooth particles, stable force chains are not easily formed, and frequent collisions occur between particles, transferring energy between them. For elastic flow with denser particle filling, force chain networks easily form, transferring internal stress through force chain deformation. When the particle system is subjected to shearing, intense friction and collisions occur between particles, thus dissipating energy and achieving vibration reduction and impact reduction. Based on the study of particle materials, simulation calculations were performed on iron-based alloy particles and polymer particles, keeping other particle parameters constant. The illustrations of different particle filling rates are shown below. Figure 4 As shown.

[0033] To determine the particle filling rate, energy consumption simulations were performed on iron-based alloy particles and polymer particles with different filling rates. The energy consumption patterns under different filling rates are as follows: Figure 4 As shown, the optimal particle size distribution for iron-based alloy particles is 95%; the optimal particle size distribution for polymeric material particles is also 95%.

[0034] Within a given shape and filling space, neither the larger nor the smaller the particle size is necessarily better. If the particle size is too small, although the number of particles is maximized for the same volume, and the chances of interaction between particles are greatest, the coefficient of friction between particles is also lower, meaning the total energy dissipation due to friction does not increase with the number of particles. Furthermore, collisions between particles and between particles and the damping inner wall significantly contribute to improving structural damping, especially higher-order damping. Although smaller-diameter particles collide with the damping inner wall more frequently, using excessively small-diameter particles greatly reduces the energy dissipation per contact, which is detrimental to increasing the total energy dissipation of the particles.

[0035] As particle size increases to a certain extent, and the corresponding collision and friction intensifies to a certain degree, the number of particles becomes a crucial factor affecting the damping effect. With a fixed damping volume, larger particle sizes result in fewer particles, leading to greater energy dissipation per contact. However, this also reduces the opportunities for interaction between particles, which is detrimental to enhancing the damping effect. Therefore, the optimal energy dissipation effect of particle damping can only be achieved through the combined effect of energy dissipation per contact and the number of contacts.

[0036] Specific Implementation Method Two: Combining Figures 1 to 2 and Figure 6 In this embodiment, the mounting surfaces of the base 1 and the top cover 2 that contact the outer wall of the lubricating oil pipeline 5 are semi-circular arc surfaces, so that the dynamic vibration damping device can fit tightly with lubricating oil pipelines of different diameters.

[0037] In this embodiment, the semi-circular arc surface maximizes the contact area with the outer wall of lubricating oil pipelines of different diameters, establishing an efficient energy transfer path. This ensures that the vibration energy of the pipeline is fully transferred to the damping particles inside the vibration absorption device, laying the foundation for subsequent energy dissipation. This structure significantly improves the versatility and adaptability of the device, allowing it to be installed on various pipelines within a certain size range without customization, reducing manufacturing and inventory costs. The tight arc surface fit combined with clamp fastening effectively constrains the radial displacement of the pipeline, enhancing its stability in vibration environments, while avoiding localized stress concentration or wear caused by poor contact, thereby improving the safety and reliability of the entire system.

[0038] In addition, the base and top cover of the vibration-absorbing device serve two purposes: firstly, as an encapsulation body to encapsulate the damping particles, and secondly, as an assembly to connect the vibration-absorbing device to the pipeline. To ensure a better fit between the vibration-absorbing device and the pipeline and to achieve the vibration-absorbing effect of the damping particles, the top cover and base are designed as a semi-circular ring structure. For ease of installation, disassembly, and maintenance, bolts and nuts are used as fasteners to connect the top cover and base clamps, which are designed with connection holes.

[0039] Specific implementation method three: Combining Figures 1 to 2 and Figure 6 In this embodiment, the damping particle 4 is made of an iron-based alloy, which forms a force chain network during collision.

[0040] In this embodiment, the damping particles 4 are made of iron-based alloy, primarily to utilize the material's excellent physical properties to construct an efficient energy dissipation mechanism. The high density of the iron-based alloy allows the particles to acquire greater momentum when subjected to vibrational excitation, resulting in stronger impact forces during collisions. This intense interaction causes the particles to rapidly form, break, and reassemble into a complex force chain network. Essentially, the formation of this force chain network instantaneously connects discrete particle groups into a dynamic structure capable of transmitting and dispersing energy. When the vibrational energy of the lubricating oil pipeline 5 is transmitted to the particle system through the base 1 and the top cover 2, the energy is transferred along these transient force chains. During this process, a large amount of energy is dissipated as heat through continuous inelastic collisions and friction between particles and between particles and the cavity wall. This dynamic energy dissipation process based on the force chain network enables the device to efficiently and rapidly suppress broadband vibrations caused by fluid pressure pulsations, especially destructive resonance phenomena, thereby significantly reducing the vibration amplitude of the pipeline and improving the safety and reliability of the system operation.

[0041] Specific implementation method four: Combination Figures 1 to 2 and Figure 6 In this embodiment, the damping particles 4 are filled with 85% to 98% of the enclosed cavity, so that the particles are in an elastic flow state in which a stable force chain network is easily formed and intense friction and collision occur.

[0042] This embodiment precisely controls the macroscopic mechanical state of the particle system, placing it in an "elastic flow" state most conducive to energy dissipation. Within this specific filling ratio range, the particle group maintains both sufficient space for movement and adequate contact density. When external vibrations are transmitted to the cavity through the base 1 and the top cover 2, the high-filling-ratio particle system does not undergo simple inertial flow as it does with a low filling ratio. Instead, it rapidly forms a large number of interwoven and continuously evolving force chain networks. These force chains, as the main pathways for carrying and transmitting vibrational energy, effectively convert mechanical energy into intense frictional heat and collision acoustic energy between particles and between particles and the cavity wall during their formation, maintenance, and breakage cycles. Simultaneously, this near-dense packing state ensures an optimal balance between the frequency and intensity of particle interactions, avoiding insufficient collision energy due to an excessively low filling ratio and preventing the possibility of suppressing necessary microscopic particle movement due to overfilling. This allows the dynamic vibration absorption device to maximize vibrational energy dissipation over a wide frequency range.

[0043] Specific Implementation Method Five: Combining Figures 1 to 2 and Figure 6 In this embodiment, the damping particles 4 have a particle size of 0.1 mm to 5 mm, in order to achieve a balance between energy dissipation in a single collision and the frequency of collisions between particles.

[0044] Based on material analysis, this embodiment uses iron-based alloy particles of different sizes to simulate the particle effects, while keeping other particle parameters constant. To determine the optimal particle size for the mixed particles, energy consumption simulations were performed on iron-based alloy particles and polymer particles of different sizes. The energy consumption patterns for different particle sizes are as follows: Figure 5 As shown, the optimal particle size for iron-based alloy particles is 2 mm, and the optimal particle size for polymer material particles is 0.15 mm.

[0045] Specific Implementation Method Six: Combination Figures 1 to 2 and Figure 6 This embodiment describes an implementation method where the iron-based alloy particles are made of high-carbon chromium bearing steel.

[0046] This embodiment selects high-carbon chromium bearing steel as the specific material for iron-based alloy particles based on the highly synergistic effect of its comprehensive properties on particle damping. Through its high carbon content and chromium alloying, this material achieves significantly higher hardness and wear resistance than ordinary steel. This ensures that the particles can effectively resist deformation and wear under long-term, high-intensity collisions and friction, maintaining their initial geometric dimensions and physical properties, thus guaranteeing the long-term stability of damping performance. Simultaneously, high-carbon chromium bearing steel possesses both high density and a moderate coefficient of restitution. Its high density allows individual particles to have greater momentum and impact energy during motion, which is beneficial for generating and maintaining a stronger force chain network during collisions. Furthermore, its heat-treated microstructure determines the coefficient of restitution, optimizing the conversion efficiency of kinetic energy to thermal energy during collisions and preventing energy rebound due to excessive elasticity. Therefore, the application of this specific material enables the damping particle system to achieve an optimal balance between forming an efficient force chain network and achieving continuous energy dissipation when dealing with broadband vibrations in lubricating oil pipelines, thereby significantly improving the vibration reduction efficiency and service life of the dynamic vibration damping device.

[0047] Specific implementation method seven: Combination Figures 1 to 2 and Figure 6 In this embodiment, the clamp 3 is connected and secured to the base 1 and the top cover 2 via a bolt and nut assembly, so as to facilitate the installation and disassembly of the power vibration absorption device.

[0048] In this embodiment, the clamp 3 is connected and secured to the base 1 and the upper cover 2 via a bolt and nut assembly. This design primarily solves the engineering problems of complex installation and difficult maintenance of traditional vibration damping devices. This connection method enables rapid assembly and reliable locking within a limited space. By tightening the nut, a continuous preload is generated, ensuring that the semi-circular arc surfaces of the base 1 and the upper cover 2 are uniformly pressed against the outer wall of the lubricating oil pipeline 5. This ensures the continuity of the vibration energy transmission path and avoids connection failure due to loosening. When maintenance of the pipeline system or adjustment of the vibration damping device position is required, non-destructive disassembly can be achieved simply by loosening or unloosening the nut. This modular assembly feature significantly reduces the maintenance and time costs of the equipment, and significantly improves the maintainability and engineering applicability of this dynamic vibration damping device in actual ship applications.

[0049] Specific implementation method eight: Combination Figures 1 to 2 and Figure 6 In this embodiment, the damping particles 4 are made of polymer materials with a particle size of 0.05 mm to 1 mm to adapt to different vibration characteristics and installation space constraints.

[0050] In this embodiment, the damping particles 4 are made of polymer materials, and their particle size is controlled within a microscale of 0.05 mm to 1 mm. This is mainly to achieve adaptability and lightweight optimization of the device under specific operating conditions. Polymer materials have low density and low elastic modulus, which allows the particle system composed of them to dissipate energy through more frequent microscopic elastoplastic deformation and viscous friction when subjected to vibration, especially showing significant suppression of mid-to-high frequency vibrations. The micro-particle size design allows for a larger number of particles to be accommodated within the same volume cavity, greatly increasing the contact points and interaction frequencies between particles and between particles and the cavity wall, thereby maximizing the energy dissipation interface within a limited space.

[0051] Specific Implementation Method Nine: Combining Figures 1 to 2 and Figure 6 In this embodiment, the dynamic vibration damping device is arranged in the lubricating oil line 5 at the point of maximum vibration response caused by the pulsating excitation of the fluid pressure of the pump.

[0052] This embodiment places the dynamic vibration damping device at the point of maximum vibration response caused by the pump-driven fluid pressure pulsation in the lubricating oil pipeline. Its core function is to capture and target the vibration energy at its source. This placement strategy is based on vibration transmission path analysis. By directly installing the damping device at the antinode of the vibration amplitude, it can effectively intercept the vibration energy before it spreads to other parts of the pipeline system. When the fluid pressure pulsation generated by the pump causes pipeline resonance, the vibration kinetic energy is most concentrated at this location. At this time, the damping particles are also most fully excited under the action of inertial force, and the intensity of their collision and friction and energy conversion efficiency can reach peak values. This targeted layout maximizes the vibration reduction effect of limited damping mass, significantly reducing local vibration stress, avoiding the risk of weld cracking, and effectively blocking the radiation propagation of vibration energy to the surrounding space through the pipe wall and supporting structure. Thus, while improving the reliability of the pipeline system, it also optimizes the acoustic environment of the entire power system.

[0053] Specific Implementation Method Ten: Combining Figures 1 to 2 and Figure 6 In this embodiment, the base 1 and the top cover 2 are made of high-strength aluminum alloy to reduce the overall weight of the device while ensuring structural rigidity.

[0054] This embodiment uses high-strength aluminum alloy to manufacture the base 1 and the top cover 2, achieving an optimal balance between lightweight and structural rigidity. This material choice allows the device to maintain sufficient structural integrity when subjected to continuous impacts from internal particles and external pipeline vibration loads, preventing deformation of the cavity from affecting the motion characteristics of the damping particles, thereby ensuring the stable formation of the force chain network and energy dissipation efficiency. Simultaneously, the significantly reduced weight effectively lowers the additional load on the pipeline system, avoiding new vibration problems caused by altering the natural frequency of the pipeline due to the installation of vibration-absorbing devices, and greatly improving installation convenience. This design is particularly suitable for weight-sensitive marine propulsion systems, providing an optimized solution for lubricating oil pipelines that combines high efficiency and low additional impact while ensuring vibration reduction performance.

[0055] Combination Figures 1 to 6 Description of embodiments of the present invention:

[0056] Taking a section of auxiliary lubricating oil pipeline in a ship's gear transmission system as an example, during the operation of the gear transmission system, air mixes into the lubricating oil, forming air-laden oil. When lubricating oil containing air bubbles enters the high-pressure chamber of the motor-driven pump, the air bubbles are violently compressed due to the high-pressure environment inside the chamber, and may even rupture, forming micro-jet streams and shock waves. This results in significant fluid pressure pulsation excitation from the motor-driven pump. The natural frequency of the auxiliary pipeline at the pump outlet and the system pipeline after coupling is close to the inherent fluid pressure pulsation frequency of the motor-driven pump. Under the excitation of significant fluid pressure pulsation, resonance occurs, which has a significant impact on the safety, stability, and quietness of the system. To address this problem, the dynamic vibration absorption device of this invention is installed for vibration reduction. On-site installation is as follows... Figure 6 As shown.

[0057] The top cover 1 and base 2 of the dynamic vibration absorption device filled with damping particles are tightly connected to the pipeline by clamps 3 to ensure the stability of the dynamic vibration absorption device.

[0058] Iron-based alloy particles are selected for particle damping, with a particle filling rate of 95% and a particle size d of 2 mm.

[0059] When the lubricating oil pipeline of the gear transmission device vibrates, the vibration is transmitted to the power vibration absorption device through the clamps, causing the damping particles inside the power vibration absorption device to vibrate and move, producing inelastic collisions, converting some of the kinetic energy into heat energy, thereby absorbing the vibration.

[0060] After the gear transmission device starts operating, it drives the motor-driven pump to start, and the lubricating oil begins to flow in the lubricating oil pipeline system. The aerated lubricating oil causes significant fluid pressure pulsation excitation in the motor-driven pump, resulting in pipeline vibration. This vibration is transmitted through the pipeline to the clamps, causing the damping particles in the upper cover and base of the vibration-absorbing device to move. The particles collide silently with each other. After a period of stable operation, vibration monitoring of the pipeline is performed using a vibration velocity data acquisition instrument. It was found that the vibration velocity amplitudes in the axial, lateral, and vertical directions were reduced before and after the installation of the dynamic vibration-absorbing damper. The vibration absorption effect is shown in Table 1. Through its application in the lubricating oil pipeline of this ship's gear transmission device, the dynamic vibration-absorbing device of this invention performs well in a real ship environment, and its vibration absorption effect is effectively verified.

[0061] Table 1 Comparison of vibration absorption effects before and after

[0062]

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dynamic vibration damping device applied to the lubricating oil pipeline system of a gear transmission device, characterized in that: Includes a base (1), a top cover (2), a clamp (3), and damping particles (4) filled in the closed cavity formed by the base (1) and the top cover (2); the clamp (3) is used to fasten the base (1) and the top cover (2) to the outer wall of the lubricating oil pipeline (5) of the gear transmission device and to transmit the vibration of the lubricating oil pipeline (5) to the closed cavity.

2. The power vibration damping device for use in the lubricating oil pipeline system of a gear transmission device according to claim 1, characterized in that: The mounting surfaces of the base (1) and the top cover (2) that contact the outer wall of the lubricating oil pipeline (5) are semi-circular arc surfaces, so that the power vibration damping device can fit tightly with lubricating oil pipelines of different diameters.

3. The power vibration damping device for use in the lubricating oil pipeline system of a gear transmission device according to claim 1, characterized in that: The damping particles (4) are made of iron-based alloys, which form a force chain network during collisions.

4. The power vibration damping device for use in the lubricating oil pipeline system of a gear transmission device according to claim 1, characterized in that: The damping particles (4) are filled with 85% to 98% of the closed cavity to make the particles in an elastic flow state that is easy to form a stable force chain network and to cause intense friction and collision.

5. A power vibration damping device for use in a lubricating oil pipeline system of a gear transmission device according to claim 1, characterized in that: The damping particles (4) have a particle size of 0.1 mm to 5 mm to achieve a balance between energy dissipation in a single collision and the frequency of collisions between particles.

6. A dynamic vibration damping device for use in a gear transmission device lubrication pipeline system according to claim 3, 4 or 5, characterized in that: The iron-based alloy particles are made of high-carbon chromium bearing steel.

7. A dynamic vibration damping device for use in a gear transmission device lubrication pipeline system according to claim 1, characterized in that: The clamp (3) is connected and fastened to the base (1) and the top cover (2) by bolt and nut assembly, so as to facilitate the installation and disassembly of the power vibration damping device.

8. A dynamic vibration damping device for use in a gear transmission device lubrication pipeline system according to claim 1, characterized in that: The damping particles (4) are made of polymer materials with a particle size of 0.05 mm to 1 mm to adapt to different vibration characteristics and installation space constraints.

9. A dynamic vibration damping device for use in a lubricating oil pipeline system of a gear transmission device according to claim 1, characterized in that: The dynamic vibration damping device is arranged in the lubricating oil pipeline (5) at the point where the vibration response caused by the pulsation of fluid pressure from the pump is the greatest.

10. A dynamic vibration damping device for use in a gear transmission device lubrication pipeline system according to claim 1, characterized in that: The base (1) and the top cover (2) are made of high-strength aluminum alloy to reduce the overall weight of the device while ensuring structural rigidity.

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