A shock absorbing structure and marine engineering equipment suitable for marine environments

Abstract

The application discloses a shock-absorbing structure suitable for a marine environment and marine engineering equipment, and relates to the technical field of marine engineering equipment. The shock-absorbing structure suitable for the marine environment comprises a rubber assembly and a metal assembly. The rubber assembly is provided with two groups of through assembly holes in a first direction. The metal assembly comprises two U-shaped pins oppositely arranged in the first direction, the two U-shaped pins are respectively arranged in corresponding assembly holes, the end of the U-shaped pin is provided with a fastener and a disc, and the two fasteners can support the corresponding disc. The shock-absorbing structure suitable for the marine environment utilizes the rubber assembly to adapt to the marine environment with high salt and high humidity, has the characteristics of not being prone to electrochemical corrosion, serves as a main bearing structure of the shock-absorbing and buffering effect, utilizes the metal assembly to have the advantage of structural rigidity, forms a rigid constraint and a protection frame for the relatively soft rubber assembly, prolongs the service life and reliability of the shock-absorbing structure as a whole, and fully meets the use requirements of the marine engineering equipment.

Description

Technical Field

[0001] This invention relates to the field of marine engineering equipment technology, and in particular to a shock-absorbing structure and marine engineering equipment suitable for marine environments. Background Technology

[0002] Marine engineering equipment operates in extreme marine environments with high salinity, high humidity, and strong ultraviolet radiation for extended periods. These harsh conditions place stringent requirements on the core shock-absorbing structures of marine engineering equipment in terms of corrosion resistance and durability. Their performance stability directly affects the operational safety and service life of marine equipment.

[0003] Currently, commonly used vibration damping structures in the industry are mainly divided into two categories: metal spring assemblies and ordinary rubber vibration damping structures. While metal spring assemblies possess strong load-bearing capacity and can meet the basic load support requirements of marine equipment, they are highly susceptible to electrochemical corrosion in high-salt, high-humidity marine environments, particularly stress corrosion cracking, which severely affects their service life and safety performance. Ordinary rubber vibration damping structures, although providing some damping and cushioning effect, suffer from poor weather resistance and are prone to aging and degradation. Furthermore, their large compression set makes them prone to performance degradation under long-term alternating loads, failing to maintain a stable damping effect.

[0004] Therefore, existing vibration damping structures lack special protective designs and performance optimizations for extreme marine environments, cannot effectively resist corrosion and aging in the marine environment, and are difficult to adapt to the performance stability requirements under long-term alternating loads. Consequently, they cannot meet the requirements of long service life and high reliability for marine engineering equipment. Therefore, a vibration damping structure and marine engineering equipment suitable for the marine environment are proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a vibration damping structure and marine engineering equipment suitable for marine environments, which solves the technical problems of existing vibration damping structures lacking special protective design and performance optimization for extreme marine environments, unable to effectively resist corrosion and aging in marine environments, and difficult to adapt to the performance stability requirements under long-term alternating loads.

[0006] To achieve the above objectives, the present invention provides a shock-absorbing structure suitable for marine environments, comprising: a rubber component and a metal component; the rubber component is provided with two sets of through mounting holes along a first direction; the metal component includes: two U-shaped pins arranged opposite to each other along the first direction, the two U-shaped pins respectively passing through the corresponding mounting holes, the ends of the U-shaped pins being provided with fasteners and discs, the two fasteners being able to hold the corresponding discs so that the two discs respectively abut against the two end faces of the rubber component.

[0007] Preferably, the rubber assembly includes a plurality of rubber elements stacked along a first direction, and the opposite end faces of two adjacent rubber elements are uniformly coated with adhesive.

[0008] Preferably, the two U-shaped pins are arranged in a cross shape on the projection plane in the first direction, and the intersection point is located at the geometric center of the rubber assembly.

[0009] Preferably, both ends of the U-shaped pin are fitted with washers, which are located between the disc and the fastener.

[0010] Preferably, the disc has four mounting holes for the U-shaped pin ends to pass through, and the mounting holes are clearance-fitted with the U-shaped pin ends.

[0011] Preferably, the surface of the metal U-shaped pin is provided with a passivation layer, which is one of a chromate passivation layer and a chromium-free passivation layer.

[0012] Preferably, a wear-resistant sleeve is pre-embedded in the assembly hole, and the wear-resistant sleeve is clearance-fitted with the U-shaped pin.

[0013] Preferably, the outer surface of the rubber element is covered with a protective film.

[0014] Preferably, the rubber element is made of one of nitrile rubber, fluororubber, and silicone rubber.

[0015] A marine engineering equipment comprising a shock-absorbing structure suitable for marine environments as described in any one of the above claims.

[0016] Compared to the aforementioned background technology, the present invention provides a vibration damping structure suitable for marine environments, which has the following beneficial effects: two U-shaped pins arranged opposite each other along a first direction pass through the rubber component and are respectively assembled into the assembly hole, realizing the synergistic cooperation between the metal component and the rubber component to form a rigid and flexible composite vibration damping structure; the rubber component is adapted to the high-salt and high-humidity marine environment and has the characteristic of not being prone to electrochemical corrosion, serving as the main load-bearing structure for vibration damping and buffering; while the metal component has the advantage of structural rigidity, forming a rigid constraint and protective frame for the relatively soft rubber component, effectively limiting the excessive deformation of the rubber component under long-term alternating loads, avoiding accelerated fatigue aging due to local stress concentration and excessive deformation, thereby effectively extending the overall service life and reliability of the vibration damping structure, so as to fully meet the usage requirements of marine engineering equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a plan view of the shock-absorbing structure provided in an embodiment of the present invention; Figure 2 This is a planar schematic diagram of the U-shaped pin provided in an embodiment of the present invention; Figure 3 This is a front view of the rubber element provided in an embodiment of the present invention; Figure 4 This is a front view of the disk provided in an embodiment of the present invention; Figure 5 This is a side view of the disk provided in an embodiment of the present invention; Figure 6 This is a side view of the disk provided in the second embodiment of the present invention.

[0019] Specifically, 1-rubber element; 101-assembly hole; 2-wear-resistant sleeve; 3-adhesive; 4-U-pin; 5-fastener; 6-disc; 601-mounting hole; 602-limiting groove; 7-gasket. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 , Figure 2 and Figure 3As shown, to achieve the above objectives, the present invention provides a shock-absorbing structure suitable for marine environments, comprising: rubber components and metal components assembled together, wherein the rubber components are columnar and adapted to high-salt, high-humidity marine environments, possessing characteristics that make them resistant to electrochemical corrosion, and serving as the main load-bearing structure for shock absorption and buffering effects; while the metal components have the advantage of structural rigidity, which can form a rigid constraint and protective framework for the relatively soft rubber components, effectively limiting the excessive deformation of the rubber components under long-term alternating loads, and preventing them from accelerating fatigue aging due to local stress concentration and excessive deformation. The rubber component has two sets of through mounting holes 101 along the first direction, each set including two symmetrically arranged mounting holes 101. The metal component includes two U-shaped pins 4 arranged opposite each other along the first direction, each U-shaped pin 4 passing through a corresponding mounting hole 101. Additionally, each U-shaped pin 4 has a fastener 5 and a disc 6 at its end. Preferably, the fastener 5 is a hexagonal head bolt, and the end of the U-shaped pin 4 has an external thread. After each U-shaped pin 4 passes through its corresponding mounting hole 101, the fastener 5 is screwed onto the end of the U-shaped pin 4 to hold the corresponding disc 6, allowing the disc 6 to press against the end face of the rubber component. By having two U-shaped pins 4 arranged opposite each other along the first direction pass through the rubber component and be assembled into the corresponding mounting holes 101, the metal component and the rubber component work together, effectively extending the overall service life and reliability of the vibration damping structure, thus fully meeting the requirements of marine engineering equipment.

[0023] Preferably, the U-shaped pin 4, fastener 5, and disc 6 are all made of 316L stainless steel. 316L stainless steel has excellent resistance to marine corrosion, high strength, and good wear resistance. Compared with ordinary stainless steel, it has better resistance to pitting corrosion and intergranular corrosion, and can withstand the alternating loads and vibration impacts generated by the operation of marine engineering equipment for a long time.

[0024] In some embodiments of the present invention, the rubber assembly includes a plurality of rubber elements 1 stacked along a first direction. That is, the rubber assembly adopts a modular stacking structure design, which can flexibly select the corresponding number of rubber elements 1 for combination and assembly according to the different requirements of marine engineering equipment for the overall length of the shock-absorbing structure, thereby improving the adaptability and applicability of the shock-absorbing structure on marine equipment of different specifications.

[0025] In some embodiments, to ensure the structural integrity and load-bearing stability of the stacked rubber assembly, a high-performance adhesive 3 is uniformly applied to the opposite end faces of two adjacent rubber elements 1. This ensures a tight fit between the two adjacent rubber elements 1, preventing corrosive media such as seawater and salt from penetrating the contact surface between the two rubber elements 1 and causing localized aging and peeling. This enhances the overall structural strength of the rubber assembly, allowing multiple independent rubber elements 1 to form a balanced, integrated structure, effectively preventing relative shifting or loosening of the individual rubber elements 1 under long-term alternating loads in the marine environment. The key to this design is to retain the shock-absorbing performance of the rubber unit while compensating for the limitations of a single rubber element 1, such as fixed length and poor adaptability, thus effectively improving the adaptability range of the rubber assembly.

[0026] In some embodiments of the present invention, two U-shaped pins 4 are arranged in a cross shape on the projection plane of the first direction. As the core force-bearing structure of the metal component, the U-shaped pins 4 form an all-round rigid constraint on the rubber component from different directions, forming a symmetrical and balanced constraint effect on the rubber component, and uniformly distributing the alternating load applied to the rubber component from the outside to the entire rubber component, avoiding excessive deformation in local areas due to force concentration.

[0027] Preferably, the intersection of the two U-shaped pins 4 on the projection plane along the first direction is located at the geometric center of the rubber component, so that the constraint force of the two U-shaped pins 4 on the rubber component is symmetrical and balanced, preventing the eccentric load moment generated in the rubber component during the stress process, avoiding eccentric deformation, torsion and other phenomena in the rubber component, thereby ensuring uniform deformation in all areas of the rubber component, effectively enhancing the rigid protection and limiting effect of the metal component on the rubber component, reducing the fatigue aging rate of the rubber component caused by local stress concentration and uneven stress, and effectively extending the service life of the rubber component.

[0028] In some embodiments of the present invention, washers 7 are fitted at both ends of the U-shaped pin 4. The washers 7 are located between the disc 6 and the fastener 5. The washers 7 are made of metal and fit tightly against the end face of the disc 6 away from the rubber assembly. The fastener 5 abuts against the other side of the washers 7, so as to evenly distribute the axial tightening force generated when the fastener 5 is tightened to the entire end face of the disc 6, preventing the problem of local extrusion deformation due to force concentration when the fastener 5 and the disc 6 are in direct contact. Moreover, the washers 7 can isolate the relative friction between the fastener 5 and the disc 6, reducing the wear and tear of both during long-term operation of the shock-absorbing structure and the process of bearing alternating loads. This effectively prevents the problem of fastener 5 loosening and the decrease in the fitting accuracy of the disc 6 caused by wear, thereby ensuring the stable pressing and rigid constraint effect of the U-shaped pin 4 on the rubber assembly.

[0029] like Figure 4 and Figure 5As shown, in some embodiments of the present invention, the disc 6 is provided with four mounting holes 601 for the end of the U-shaped pin 4 to pass through, so that the end of the U-shaped pin 4 can be smoothly inserted into the disc 6 to complete the assembly, while eliminating the mating gap to prevent the U-shaped pin 4 from radially shaking or shifting in the hole, and realizing a stable connection between the U-shaped pin 4 and the rubber component.

[0030] Optionally, the mounting hole 601 is clearance-fitted with the end of the U-pin 4, and the inner wall of the mounting hole 601 is kept as separate from the end of the U-pin 4 as possible. This ensures that the axial clamping force transmitted by the U-pin 4 is evenly applied to the entire mating surface of the disc 6, and then the disc 6 smoothly and evenly transmits the force to the end face of the rubber component. This avoids the phenomenon of force point displacement or local stress concentration, effectively limiting the radial displacement of the U-pin 4 during the process of the shock-absorbing structure being subjected to alternating loads in the marine environment. This ensures the synergistic effect of the disc 6 and the U-pin 4, and the disc 6 can always maintain a parallel and mating state with the end face of the rubber component to evenly press against the rubber component. This further avoids the problem of local extrusion deformation of the rubber component due to uneven force on the end face, enhances the rigid constraint and protection effect of the metal component on the rubber component, and improves the reliability of the shock-absorbing structure during use.

[0031] like Figure 6 As shown, to further address the issue of radial displacement of the disc 6 relative to the end face of the rubber component during use, a limiting groove 602 adapted to the end face of the rubber component is provided on the side of the disc 6 facing the rubber component. The depth and radial cross-section of the limiting groove 602 allow the edge of the end face of the rubber component to be embedded within it, forming a concave-convex fitting positioning structure. This achieves radial limiting constraint between the disc 6 and the rubber component, preventing the disc 6 from shifting or misaligning due to vibration or impact loads. This effectively improves the stability and coaxiality of the connection between the disc 6 and the rubber component, thereby enhancing the overall structural stability of the damping structure.

[0032] In some embodiments of the present invention, the surface of the metal U-pin 4 is provided with a passivation layer, which is one of a chromate passivation layer and a chromium-free passivation layer. The passivation layer forms a strong bond with the U-pin 4, completely covering the outer surface of the U-pin 4. This creates a stable chemical protective barrier on the surface of the metal U-pin 4, effectively isolating it from direct contact with high-salt water vapor, chloride ions, and corrosive media in the marine environment. This inhibits electrochemical corrosion, pitting, and rusting of the U-pin 4, improving its corrosion resistance. This allows the U-pin 4 to maintain structural integrity and assembly stability even under long-term alternating loads and contact with corrosive media in marine conditions. It should be noted that both chromate and chromium-free passivation layers are suitable for the harsh conditions of high salinity and humidity in the ocean. The chromium-free passivation layer is more in line with environmentally friendly production and usage requirements.

[0033] In some embodiments of the present invention, to solve the problem of rubber wear caused by direct contact between the U-shaped pin 4 and the wall of the rubber assembly hole 101 during the alternating load of the damping structure, a wear-resistant sleeve 2 is pre-embedded in the assembly hole 101, and the wear-resistant sleeve 2 is clearance-fitted with the U-shaped pin 4; by pre-installing wear-resistant sleeves 2 inside each assembly hole 101 on the rubber assembly, the wear-resistant sleeve 2 is tightly fitted to the wall of the assembly hole 101, and its inner wall is clearance-fitted with the U-shaped pin 4 passing through the assembly hole 101. The wear-resistant sleeve 2 provides a reasonable clearance for the insertion and movement of the U-shaped pin 4. Furthermore, the wear-resistant sleeve 2 forms a physical isolation layer between the U-shaped pin 4 and the rubber assembly, directly absorbing the radial friction and contact forces generated by the U-shaped pin 4 during alternating loads on the damping structure. This prevents direct contact between the U-shaped pin 4 and the wall of the rubber assembly hole 101, thus avoiding rubber wear. It also reduces frictional loss between the outer surface of the U-shaped pin 4 and the assembly hole 101, protecting the passivation layer on the surface of the U-shaped pin 4 from scratches and maintaining its anti-corrosion effect. It should be noted that the length of the wear-resistant sleeve 2 is less than the length of the assembly hole 101; that is, both ends of the wear-resistant sleeve 2 do not extend beyond the ends of the assembly hole 101, thus not affecting the buffering and damping performance of the damping structure.

[0034] In some embodiments of the present invention, the outer surface of the rubber element 1 is covered with a protective film. Specifically, the outer surface of each individual rubber element 1 is covered with a protective film. The protective film is made of a corrosion-resistant, aging-resistant, and swelling-resistant special material suitable for the high-salt and high-humidity marine environment, preferably a polytetrafluoroethylene film. The protective film can form a reliable physical protective barrier on the surface of the rubber element 1, isolating the rubber element 1 from direct contact with high-salt water vapor, chloride ions, corrosive media, and marine organism secretions in the marine environment, effectively delaying the aging, cracking, swelling, and hardening deterioration of the rubber element 1. This enhances the stability of the overall shock-absorbing structure when used in a marine environment.

[0035] In some embodiments of the present invention, the rubber element 1 is made of one of nitrile rubber, fluororubber, and silicone rubber. Nitrile rubber, fluororubber, and silicone rubber are all high-performance rubber materials that are corrosion-resistant, aging-resistant, and swelling-resistant. Each material has its own advantages. Fluororubber and silicone rubber possess excellent resistance to seawater corrosion and chloride ion attack, while nitrile rubber has excellent wear resistance, tear resistance, and compression set resistance. It can be flexibly selected according to different usage scenarios and vibration reduction requirements of marine engineering equipment. This allows the rubber element 1 to maintain excellent elasticity and resilience, fully playing its core role in vibration damping and effectively absorbing vibration and impact loads generated during the operation of marine equipment. It also enhances the rubber element 1's tolerance to the marine environment, preventing rapid failure due to poor corrosion resistance and easy aging. Furthermore, it effectively resists fatigue wear caused by long-term alternating loads, reduces the deformation of the rubber element 1, slows down the fatigue aging rate of the rubber element 1, and thus extends the service life of the rubber assembly and the entire vibration damping structure to meet the usage requirements of marine engineering equipment.

[0036] It should be noted that the manufacturing method of the rubber components is as follows: First, several independent rubber components 1 are vulcanized and placed in a dedicated drying oven. The drying oven is controlled to gradually rise to the first preset temperature, specifically 150℃, according to a preset temperature curve. At this temperature, the rubber components 1 are dried at a constant temperature for a preset time of 6 hours to fully remove residual moisture and vulcanization byproducts from the rubber components 1, effectively improving the structural stability of the rubber components 1 and preventing performance degradation due to internal moisture evaporation or component instability in the high-salt, high-humidity marine environment. After drying is completed, the drying oven is stopped, and the rubber components 1 are left to cool naturally to the second preset temperature, specifically 150℃, to avoid internal stress or surface cracking caused by sudden cooling, providing a suitable surface condition for subsequent protective film wrapping and adhesive 3 application. Then, a layer of salt-resistant, moisture-resistant, and corrosion-resistant protective film is uniformly wrapped around the outer surface of each rubber element 1. The protective film adheres tightly to the surface of the rubber element 1 to form a physical barrier, preventing salt, moisture, and corrosive media in the marine environment from directly contacting the rubber body, thus delaying rubber aging without affecting the elastic deformation and shock absorption performance of the rubber element 1 itself. Finally, a sufficient amount of high-performance adhesive 3 of uniform thickness is uniformly applied to both ends of each rubber element 1. The selected adhesive 3 has good compatibility with the rubber material and the protective film to ensure a firm bond at the bonding interface. According to the required overall length of the rubber assembly, the corresponding number of rubber elements 1 are aligned and bonded sequentially along the first direction, so that multiple rubber elements 1 form an integrated rubber assembly.

[0037] In addition to the aforementioned vibration damping structure suitable for marine environments, this invention also provides marine engineering equipment that includes the vibration damping structure disclosed in the above embodiments. The structures of other parts of this marine engineering equipment are described in the prior art and will not be repeated here. This includes the rotor structure described above.

[0038] In summary, the synergistic cooperation between metal and rubber components leverages the rubber components' adaptability to high-salt, high-humidity marine environments and their resistance to electrochemical corrosion, serving as the primary load-bearing structure for shock absorption. Meanwhile, the rigidity of the metal components provides a rigid constraint and protective framework for the relatively soft rubber components, effectively limiting excessive deformation under long-term alternating loads. This prevents accelerated fatigue aging due to localized stress concentration and excessive deformation, thereby effectively extending the overall service life and reliability of the shock-absorbing structure to fully meet the requirements of marine engineering equipment.

[0039] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0040] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A vibration damping structure suitable for marine environments, characterized in that, include: Rubber components and metal components; The rubber assembly is provided with two sets of through mounting holes (101) along the first direction; the metal assembly includes two U-shaped pins (4) arranged opposite to each other along the first direction, the two U-shaped pins (4) respectively passing through the corresponding mounting holes (101), the ends of the U-shaped pins (4) are provided with fasteners (5) and discs (6), the two fasteners (5) can hold the corresponding discs (6) so that the two discs (6) respectively abut against the two end faces of the rubber assembly.

2. The vibration damping structure suitable for marine environments according to claim 1, characterized in that, The rubber assembly includes a plurality of rubber elements (1) stacked along a first direction, and the opposite end faces of two adjacent rubber elements (1) are uniformly coated with adhesive (3).

3. The vibration damping structure suitable for marine environments according to claim 1, characterized in that, The two U-shaped pins (4) are arranged in a cross shape on the projection plane of the first direction, and the intersection point is located at the geometric center of the rubber assembly.

4. The vibration damping structure suitable for marine environments according to claim 3, characterized in that, Both ends of the U-shaped pin (4) are fitted with gaskets (7), which are located between the disc (6) and the fastener (5).

5. The vibration damping structure suitable for marine environments according to claim 4, characterized in that, The disc (6) has four mounting holes (601) for passing through the end of the U-shaped pin (4), and the mounting holes (601) are clearance-fitted with the end of the U-shaped pin (4).

6. The vibration damping structure suitable for marine environments according to any one of claims 1-5, characterized in that, The surface of the metal U-shaped pin (4) is provided with a passivation layer, which is one of a chromate passivation layer and a chromium-free passivation layer.

7. The vibration damping structure suitable for marine environments according to any one of claims 1-5, characterized in that, A wear-resistant sleeve (2) is pre-embedded in the assembly hole (101), and the wear-resistant sleeve (2) is clearance-fitted with the U-shaped pin (4).

8. The vibration damping structure suitable for marine environments according to claim 2, characterized in that, The outer surface of the rubber element (1) is covered with a protective film.

9. The vibration damping structure suitable for marine environments according to claim 2, characterized in that, The rubber element (1) is made of one of the following materials: nitrile rubber, fluororubber, and silicone rubber.

10. A marine engineering equipment, characterized in that, The vibration damping structure applicable to marine environments includes any one of the claims 1-9 above.

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