Shock absorption and noise reduction device of ship transmission system
By dispersing and absorbing vibration energy through a multi-layered damping structure, the problem of high vibration and noise intensity in the ship's transmission system is solved, resulting in more stable and comfortable operation.
Patent Information
- Application Number
- CN202520431871.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Modern ship propulsion systems experience high levels of vibration and noise in complex marine environments, which existing vibration reduction solutions struggle to effectively suppress, impacting equipment lifespan and ship performance.
It adopts a multi-layered vibration reduction structure, including a vibration reduction base, connecting bracket, rotating vibration damper and vibration isolation pad. Through precise design and material selection, it disperses, absorbs and converts vibration energy to form multiple vibration reduction barriers.
It significantly reduces the vibration and noise intensity of the ship's transmission system, improves equipment stability and service life, and enhances navigation performance and comfort.
Smart Images
Figure CN223725340U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of transmission box related accessories, specifically relates to a ship transmission system damping and noise reduction device. BACKGROUND
[0002] In modern shipbuilding industry, the vibration and noise problem of transmission system is increasingly prominent, and has become a key technical bottleneck restricting the performance improvement of ships. The ship sails in the marine environment, and its transmission system bears complex excitation from the engine, propeller and sea waves. The vibration generated by these excitations not only affects the comfort of the crew, but also accelerates the aging of the equipment, reduces the reliability and safety of the ship. Therefore, efficient damping and noise reduction technology is crucial for modern ships.
[0003] However, the traditional damping scheme is not up to the challenge. These schemes mainly rely on single material rubber pads or simple spring dampers. These materials and structures may provide certain damping effect in a specific frequency range, but they are difficult to comprehensively and effectively suppress vibration and noise in complex working environments. The marine sailing environment is complex and variable, and the excitation received by the ship transmission system has the characteristics of wide frequency band and nonlinearity. Single material or simple structure dampers cannot meet the actual needs.
[0004] The existing ship transmission system has the technical problems of high vibration and noise intensity, short service life of equipment and poor running stability, which seriously affects the sailing performance and comfort of the ship. INVENTION CONTENTS
[0005] Therefore, the utility model provides a ship transmission system damping and noise reduction device, which can solve the problem of high vibration and noise intensity of the existing ship transmission system.
[0006] The utility model is implemented as follows:
[0007] The utility model provides a ship transmission system damping and noise reduction device, which comprises a damping base, a connecting bracket, a rotating damper, a vibration isolation pad and a connecting fixing piece. The damping base is a rectangular planar structure, and the bottom is provided with a plurality of support protrusions distributed at intervals. The connecting bracket is fixedly installed on the upper surface of the damping base and has an L-shaped structure with a vertical section and a horizontal section connected perpendicularly. The rotating damper is installed on the horizontal section of the connecting bracket and comprises an outer shell and an embedded damping elastic piece. The damping elastic piece is an annular rubber pad. The vibration isolation pad is arranged between the outer shell of the rotating damper and the connecting bracket to further reduce vibration transmission. The connecting fixing piece is arranged in the outer shell of the rotating damper and the vibration isolation pad to fix and limit the relative displacement of the components.
[0008] The technical effect of the ship transmission system damping and noise reduction device is as follows: the damping base, the connecting support, the rotating damper, the vibration isolation pad and the connecting fixing piece are combined to realize the multi-level and multi-angle damping and noise reduction function of the ship transmission system.
[0009] On the basis of the above technical scheme, the ship transmission system damping and noise reduction device can be further improved as follows:
[0010] The support protrusion of the damping base is in trapezoidal structure, the top surface and the bottom surface of the support protrusion form an included angle of 15°, the height of the support protrusion is 20 mm, the width of the bottom surface is 40 mm, and the width of the top surface is 30 mm.
[0011] The beneficial effect of the above improvement scheme is that the trapezoidal structure of the support protrusion of the damping base is accurately designed, and the vibration dispersion and buffering capacity are optimized.
[0012] Further, the L-shaped structure of the connecting support is provided with a plurality of through holes on the vertical section, and the through holes are used for mounting the connecting fixing piece; and the material of the connecting support is 45 steel, and the surface is subjected to corrosion protection treatment.
[0013] The beneficial effect of the above improvement scheme is that a plurality of through holes are arranged on the vertical section of the connecting support to provide accurate mounting positions for the connecting fixing piece, and 45 steel is selected and subjected to corrosion protection treatment, so that the mechanical strength and corrosion resistance of the connecting support are significantly improved.
[0014] Further, the outer shell of the rotating damper is in cylindrical structure, the inner diameter of the outer shell is 80 mm, and the wall thickness is 10 mm; and the damping elastic piece is an annular rubber pad with a hardness of 60° Shore A, and the thickness of the rubber pad is 15 mm.
[0015] The beneficial effects of the above improvement scheme are: through the precise design of the cylindrical shell of the rotary damper and the annular rubber pad, high-efficiency absorption and conversion of vibration energy are realized. The shell of a specific size and the rubber pad with a hardness of 60° Shore A can maximize the absorption of vibration energy, effectively reduce vibration transmission, reduce noise generation, and improve the smoothness and comfort of the ship transmission system.
[0016] Further, the vibration isolation pad is a rectangular planar structure, made of fluororubber, with a thickness of 5 mm, a hardness of 50° Shore A, and a geometric center located at the geometric center of the rotary damper shell.
[0017] The beneficial effects of the above improvement scheme are: the vibration isolation pad made of fluororubber further weakens the vibration transmission path through its unique material properties and precise geometric center positioning. The flexibility and low hardness of the vibration isolation pad can absorb residual vibrations, and its symmetrical arrangement ensures uniform vibration suppression, significantly improving the damping effect of the ship transmission system.
[0018] Further, the connecting fixture is a hexagonal head bolt with a nominal diameter of 12 mm and a length of 100 mm, which passes through the vibration isolation pad, the rotary damper shell, and is tightly connected with the connecting bracket.
[0019] The beneficial effects of the above improvement scheme are: the use of a hexagonal head bolt of a specific specification as a connecting fixture ensures the tight connection and uniform stress between the damping components through its precise size and installation method. The length and diameter of the bolt can effectively limit the relative displacement of the components, enhance the stability of the overall structure, and reduce the vibration amplification effect caused by loose connection.
[0020] Further, the surface of the damping base is provided with a plurality of spaced protrusions with a height of 10 mm.
[0021] The beneficial effects of the above improvement scheme are: the addition of spaced protrusions on the surface of the damping base further optimizes the vibration dispersion and buffering mechanism. These protrusions can provide additional buffering surfaces during vibration transmission, disperse vibration energy, reduce the concentration of vibrations, enhance the damping base's ability to suppress external vibrations, and improve the overall damping effect.
[0022] Further, the surface protrusions of the damping base are in a triangular structure.
[0023] The beneficial effect of the improved scheme is that the protrusions on the surface of the shock-absorbing base are designed in a triangular structure, which can more effectively disperse and guide the vibration energy through its geometric characteristics. The sharp corners and inclined surfaces of the triangular protrusions can promote the dissipation and conversion of vibration energy, reduce the reflection and superposition of vibration, and further improve the shock-absorbing performance.
[0024] Further, the width of the bottom surface of the protrusion of the shock-absorbing base is 25 mm.
[0025] The beneficial effect of the improved scheme is that the width of the bottom surface of the protrusion of the shock-absorbing base is accurately controlled, and the vibration dispersion and support stability are optimized. The 25 mm bottom surface width can provide a good stress area, enhance the support capacity of the shock-absorbing base, reduce the micro displacement caused by vibration, and improve the overall stability of the equipment.
[0026] Further, the number of protrusions on the surface of the shock-absorbing base is 3, and they are equidistantly distributed.
[0027] The beneficial effect of the improved scheme is that the optimal vibration energy dispersion is achieved by equidistantly distributing 3 protrusions on the surface of the shock-absorbing base. The equidistant arrangement ensures the uniformity of vibration suppression, avoids the concentration of vibration energy in a certain area, and improves the stability and balance of the overall shock-absorbing effect.
[0028] Compared with the prior art, the beneficial effect of the ship transmission system shock-absorbing and noise-reducing device provided by the present application is that: the present application innovatively designs a multi-level shock-absorbing structure, adopts a special-shaped shock-absorbing base, a precisely designed connecting bracket, a high-performance rotary shock absorber and a vibration isolation pad, and realizes the multiple dispersion, absorption and conversion of vibration energy of the ship transmission system. Compared with the traditional shock-absorbing scheme, the present scheme significantly reduces the vibration transmission strength, reduces the noise generation, improves the stability and service life of the equipment, effectively improves the overall performance of the ship transmission system, and provides an efficient and reliable shock-absorbing and noise-reducing solution for the ship industry. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creating any creative labor.
[0030] Figure 1 is a structural schematic view of a ship transmission system shock-absorbing and noise-reducing device.
[0031] In the drawings, the component list represented by each reference sign is as follows:
[0032] 10. Vibration damping base; 11. Support protrusion; 20. Connecting bracket; 30. Rotating shock absorber; 31. Vibration damping elastic element; 40. Vibration isolation pad; 50. Connecting fastener. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0034] like Figure 1 The diagram illustrates an embodiment of a vibration damping and noise reduction device for a ship transmission system provided by this utility model. This embodiment includes: a vibration damping base 10, a connecting bracket 20, a rotating vibration damper 30, a vibration isolation pad 40, and a connecting fastener 50. The vibration damping base has a rectangular planar structure with multiple spaced support protrusions 11 at its bottom. The connecting bracket is fixedly installed on the upper surface of the vibration damping base and has an L-shaped structure, with its vertical section perpendicularly connected to its horizontal section. The rotating vibration damper is installed on the horizontal section of the connecting bracket and includes a housing and a built-in vibration damping elastic element 31, which is a ring-shaped rubber pad. The vibration isolation pad 40 is disposed between the housing of the rotating vibration damper and the connecting bracket to further reduce vibration transmission. The connecting fastener passes through the housing of the rotating vibration damper and the vibration isolation pad to fix and limit the relative displacement of each component.
[0035] In the above technical solution, the support protrusion of the shock-absorbing base is a trapezoidal structure, with a 15° angle between the top and bottom surfaces of the support protrusion. The height of the support protrusion is 20 mm, the bottom width is 40 mm, and the top width is 30 mm.
[0036] Furthermore, in the above technical solution, multiple through holes are provided on the vertical section of the L-shaped structure of the connecting bracket, and the through holes are used to install connecting fasteners; the material of the connecting bracket is 45 steel, and the surface is treated with anti-corrosion.
[0037] Furthermore, in the above technical solution, the outer shell of the rotating shock absorber is a cylindrical structure with an inner diameter of 80 mm and a wall thickness of 10 mm; the shock-absorbing elastic element is an annular rubber pad with a hardness of 60° Shore A and a thickness of 15 mm.
[0038] Furthermore, in the above technical solution, the vibration isolation pad is a rectangular planar structure, made of fluororubber, with a thickness of 5 mm and a hardness of 50° Shore A. The geometric center of the vibration isolation pad is located at the geometric center of the rotating shock absorber housing.
[0039] Further, in the above technical solution, the connecting fixing member is a hexagonal head bolt, the nominal diameter of the bolt is 12 mm, the length is 100 mm, the hexagonal head bolt passes through the vibration isolation pad, rotates the damper shell and is tightly connected with the connecting bracket.
[0040] Further, in the above technical solution, the surface of the damping base is provided with a plurality of spaced protrusions, the height of the protrusions is 10 mm.
[0041] Further, in the above technical solution, the surface protrusions of the damping base are in a triangular structure.
[0042] Further, in the above technical solution, the protrusion bottom width of the damping base is 25 mm.
[0043] Further, in the above technical solution, the number of protrusions on the surface of the damping base is 3, and they are equidistantly distributed.
[0044] During installation, first fix the damping base on the base platform of the ship transmission system, ensure that the base support protrusions are in close contact with the platform. Accurately install the connecting bracket on the damping base and fix it with the hexagonal head bolt through the through hole. When installing the rotary damper, ensure that the annular rubber pad is completely attached to the shell, adjust the position of the damper through the vibration isolation pad to align its geometric center. Finally, use the connecting fixing member to tightly connect all parts to ensure the stability of the entire damping system. During actual use, regularly check the fastening degree of each connection part and the wear of the damping parts, and timely maintain and replace them.
[0045] A specific embodiment 1 of the utility model is provided below:
[0046] This embodiment takes the main propulsion system of a medium-sized cargo ship as the application background and elaborates the specific implementation of the damping and noise reduction device. The damping base is made of high-strength cast iron material, with a size of 300 mm x 200 mm and a thickness of 30 mm. Three triangular protrusions with a height of 10 mm and a base width of 25 mm are arranged at the bottom, and the top surface and the bottom surface of the protrusions form an angle of 15°, which is used to disperse and buffer the vibration. The connecting bracket is made of 45 steel and is treated for corrosion resistance. The vertical section of the L-shaped structure is 150 mm long, and the horizontal section is 100 mm long. Four through holes with a diameter of 15 mm are arranged on the vertical section for installing the connecting and fixing parts. The outer shell of the rotary damper is made of carbon steel material, with an inner diameter of 80 mm and a wall thickness of 10 mm. A ring-shaped rubber pad with a hardness of 60° Shore A is embedded inside, with a thickness of 15 mm. The vibration isolation pad is made of fluororubber material, with a thickness of 5 mm and a hardness of 50° Shore A. The geometric center of the vibration isolation pad is aligned with the center of the outer shell of the rotary damper. The connecting and fixing parts are M12 hexagonal head bolts with a length of 100 mm, which are connected by penetrating the vibration isolation pad, the outer shell of the rotary damper, and the connecting bracket. In actual testing, the damping and noise reduction device reduces the vibration intensity of the ship's main propulsion system by more than 30%, significantly reduces the noise level, and significantly improves the running stability and comfort. Embodiment
[0047] This embodiment takes the propulsion system of an offshore wind power operation and maintenance ship as the application background and demonstrates another specific implementation of the damping and noise reduction device. The damping base is made of high-strength aluminum alloy material, which has excellent corrosion resistance and lightweight characteristics. The size is 250 mm x 180 mm, and the thickness is 25 mm. Three trapezoidal protrusions with a height of 8 mm and a base width of 22 mm are arranged at the bottom, and the top surface and the bottom surface of the protrusions form an angle of 12°, which is used to precisely disperse and buffer the complex vibration in the marine environment.
[0048] The connecting bracket is made of stainless steel 316L material, which has excellent resistance to seawater corrosion. The vertical section of the L-shaped structure is 120 mm long, and the horizontal section is 90 mm long. Three through holes with a diameter of 12 mm are arranged on the vertical section, and the edges of the through holes are chamfered to reduce stress concentration. The surface of the bracket is treated by electrolytic polishing to improve the surface smoothness and reduce the risk of corrosion. The outer shell of the rotary damper is made of titanium alloy material, with an inner diameter of 70 mm and a wall thickness of 8 mm. A special composite rubber pad with a hardness of 55° Shore A is embedded inside, with a thickness of 12 mm. The rubber pad adds a small amount of nano ceramic particles, which further enhances the damping performance.
[0049] The vibration isolation pad is made of modified fluororubber material, has a thickness of 4 mm, a hardness of 48 degrees Shore A, and a small amount of graphene reinforcing material is added in the material to improve the vibration isolation performance and durability. The geometric center of the vibration isolation pad is accurately aligned with the center of the rotating damper shell to ensure the uniformity of vibration energy dispersion. The connecting fixing member is a titanium alloy hexagonal head bolt with a specification of M10, a length of 90 mm, and a passivated surface to improve the corrosion resistance and fatigue resistance.
[0050] In practical applications, the damping and noise reduction device is installed near the main propulsion system transmission shaft of the wind power operation ship. Through precise measurement, the vibration intensity of the ship propulsion system is reduced by more than 35% after installation of the device, the noise level is significantly reduced, and the suppression effect in the high-frequency vibration range is more obvious. After 500 hours of continuous navigation, the device has no obvious wear and tear, the connection is tight, and the stability and reliability of the device in the harsh marine environment are fully reflected.
[0051] Compared with the traditional damping scheme, the damping and noise reduction device of the embodiment not only significantly improves the running stability of the ship propulsion system, but also effectively reduces the weight of the overall device by selecting high-performance lightweight materials, thereby providing technical support for energy saving and emission reduction of offshore wind power operation ships. The innovative design of the device enables the ship to maintain a high-efficiency and stable running state in a complex marine environment, thereby providing a new solution for performance improvement of marine engineering equipment.
[0052] Specifically, the principle of the utility model is that: by constructing a multi-level and multi-angle damping and noise reduction system, the vibration energy transmission and conversion mechanism is fundamentally changed. The trapezoidal and triangular protrusions of the damping base can effectively disperse vibration energy and reduce the concentration of vibration; the L-shaped connecting bracket provides a stable support base to limit the lateral propagation of vibration; the annular rubber pad of the rotating damper absorbs vibration energy through material properties and converts mechanical vibration into small heat energy; the vibration isolation pad further weakens vibration transmission and forms multiple vibration barriers. The core of this multi-level damping design is to change the vibration transmission path, disperse, absorb and convert vibration energy, rather than simply block vibration.
[0053] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.
Claims
1. A ship transmission system shock and noise reduction device, characterized by, The utility model relates to a shock-absorbing base, connecting support, rotary shock absorber, vibration isolation pad and connecting fixing piece, and the shock-absorbing base is rectangular plane structure, and the bottom is equipped with a plurality of interval distribution's support convex, the connecting support fixed mounting is at the upper surface of shock-absorbing base, and the connecting support is L type structure, and its vertical section is perpendicular with horizontal section connection, the rotary shock absorber is installed in the horizontal section of connecting support, and rotary shock absorber includes shell and built-in shock-absorbing elastic piece, and the shock-absorbing elastic piece is annular rubber pad, the vibration isolation pad sets up between the shell of rotary shock absorber and connecting support, is used for further reducing vibration transmission, and the connecting fixing piece is threaded in the shell of rotary shock absorber and vibration isolation pad, is used for fixed and limit the relative displacement of each component. The support convex of the shock-absorbing base is trapezoidal structure, and the top surface and the bottom surface of the support convex form a 15° angle, the height of the support convex is 20 mm, the bottom surface width is 40 mm, and the top surface width is 30 mm.
2. A ship transmission system shock and noise reduction device according to claim 1, characterized in that, The L type structure vertical section of the connecting support is provided with a plurality of through holes, and the through holes are used for installing the connecting fixing piece; the material of the connecting support is No.
3. A ship transmission system shock and noise reduction device according to claim 2, characterised in that, The shell of the rotary shock absorber is a cylindrical structure, the inner diameter of the shell is 80 mm, and the wall thickness is 10 mm; the shock-absorbing elastic piece is an annular rubber pad with a hardness of 60° Shore A, and the thickness of the rubber pad is 15 mm.
4. A ship transmission system damping and noise reducing device according to claim 3, characterized in that The vibration isolation pad is a rectangular plane structure, the material is fluorine rubber, the thickness is 5 mm, the hardness is 50° Shore A, and the geometric center of the vibration isolation pad is located at the geometric center of the shell of the rotary shock absorber.
5. A ship transmission system damping and noise reducing device according to claim 4, characterized in that The connecting fixing piece is a hexagonal head bolt, the nominal diameter of the bolt is 12 mm, the length is 100 mm, the hexagonal head bolt passes through the vibration isolation pad, the shell of the rotary shock absorber and is tightly connected with the connecting support.
6. A ship transmission system damping and noise reducing device according to claim 5, characterized in that The surface of the shock-absorbing base is provided with a plurality of interval distribution's convex, and the height of the convex is 10 mm.
7. A ship transmission system damping and noise reducing arrangement according to claim 6, characterized in that The surface convex of the shock-absorbing base is a triangular structure.
8. A marine drive train shock and noise reduction device according to claim 7, characterised in that, The bottom surface width of the convex of the shock-absorbing base is 25 mm.
9. A marine drive train shock and noise reduction device according to claim 8, characterised in that, The number of the convex on the surface of the shock-absorbing base is 3, and the convex is equidistantly distributed.
10. A marine drive train shock and noise reduction device according to claim 9, characterised in that,