Metallic damper with infinitely adjustable stiffness

Abstract

The application discloses a metal damper with infinitely adjustable rigidity, and belongs to the technical field of damping and noise reduction. The damper comprises an upper mounting assembly, a rigidity adjusting assembly and a lower mounting assembly, which are connected through welding. The upper assembly is connected with a machine foot, and the lower assembly is connected with a mounting base. The rigidity adjusting assembly is provided with a connecting boss, two groups of adjusting tracks, fastening bolts and two metal-rubber adjusting sliding blocks. The sliding blocks can be symmetrically moved along the track long strip-shaped holes. The rigidity is infinitely adjusted by adjusting the distance between the sliding blocks. The damper is made of full metal material, is resistant to radiation and aging, has stable structure, is convenient to adjust and operate, and can be set in size according to requirements. The damper can be adapted to the vibration excitation characteristics of ship mechanical equipment, realizes optimal vibration isolation, and has high universality and practicability.

Description

Technical Field

[0001] This invention belongs to the field of vibration reduction and noise reduction technology, specifically relating to a metal vibration damper with infinitely adjustable stiffness. Background Technology

[0002] Shipboard machinery is typically mounted on a base using vibration dampers to reduce vibrations transmitted from the equipment's feet to the mounting base. Due to significant differences in parameters such as rotational speed and interfaces among different shipboard machinery, the vibration excitation generated by the equipment is complex and varied.

[0003] In the existing technology, the stiffness of the vibration dampers used in the installation of ship machinery and equipment is fixed and cannot be adjusted according to the actual vibration excitation of the equipment. This makes it difficult for the vibration dampers to be in the optimal vibration isolation state, and the isolation effect on the transmission of vibration from the equipment feet to the base is not good, which cannot meet the diverse vibration reduction needs of ship machinery and equipment.

[0004] Therefore, developing a vibration damper that can adjust its stiffness according to actual working conditions to achieve optimal vibration isolation has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] (a) Purpose of the invention In view of the technical defects of existing vibration dampers, such as non-adjustable stiffness and poor vibration isolation effect, the purpose of this invention is to provide a metal vibration damper with stepless stiffness adjustment, so as to realize the stepless adjustment of the damper stiffness within the maximum and minimum range, adapt to the vibration excitation characteristics of different ship mechanical equipment, and achieve the optimal vibration isolation effect.

[0006] (II) Technical Solution To achieve the above-mentioned objectives, the present invention provides a metal vibration damper with infinitely adjustable stiffness, comprising an upper mounting assembly, a stiffness adjustment assembly, and a lower mounting assembly; the upper mounting assembly is used to connect to the equipment feet, the lower mounting assembly is used to connect to the mounting base, and the upper mounting assembly and the lower mounting assembly are welded together through the stiffness adjustment assembly.

[0007] The upper mounting assembly includes a threaded mounting component, a first metal rubber component, and a first metal plate. The threaded mounting component is a cylindrical metal structure with an internally threaded opening for connection to the equipment via bolts. The first metal plate is a rectangular flat plate structure with chamfered corners. Its length, width, and thickness can be set according to requirements. The first metal rubber component is integrally cast from an upper cylindrical boss and a lower flat plate structure. The threaded mounting component and the first metal plate are fastened together by a casting process. The length and width of the lower flat plate structure of the first metal rubber component are the same as those of the first metal plate, and its thickness can be set according to requirements.

[0008] The stiffness adjustment assembly includes a first connecting boss, a first adjusting rail, fastening bolts, two adjusting sliders, a second adjusting rail, and a second connecting boss. The first connecting boss is a cuboid metal structure with a length equal to the width of the first metal plate; its width and thickness can be set according to requirements. The fastening bolt consists of four sets of bolts and nuts, each bolt including a bolt head and a threaded rod, used to fasten the first adjusting rail, the adjusting sliders, and the second adjusting rail. The first adjusting rail is a rectangular flat plate structure with chamfered corners. Its length and width are the same as the first metal plate, and its thickness can be set according to requirements. The first adjusting rail has four sets of elongated openings, symmetrically positioned left-right and top-bottom. Each set of openings has two layers: the upper layer opening is slightly wider than the bolt head for bolt head recess installation, and the lower layer opening is slightly wider than the threaded rod diameter for threaded rod passage. The adjusting sliders are made of metal rubber. The first adjustment plate is a rectangular prism made of metal. The length of the two adjusting sliders is the same as the width of the first connecting boss. The width and thickness can be set according to requirements. The two adjusting sliders can move symmetrically along the elongated opening between the first and second adjusting tracks. The second adjusting track is a rectangular flat plate structure with chamfered corners. Its length and width are the same as the first metal plate, and its thickness can be set according to requirements. The second adjusting track has four sets of elongated openings, the positions of which correspond to the opening positions on the first adjusting track. The width of the openings is slightly larger than the diameter of the screw. The second connecting boss is a rectangular metal structure with the same dimensions as the first connecting boss. When the two adjusting sliders are close together to the minimum distance, the damper stiffness is at its maximum. When the two adjusting sliders are far apart to the maximum distance, the damper stiffness is at its minimum. By adjusting the distance between the two adjusting sliders, the damper can be infinitely adjusted between the maximum and minimum stiffness.

[0009] The lower mounting assembly includes a second metal plate, mounting through holes, and a second metal rubber component. The second metal plate is a rectangular flat plate with chamfered corners. Its length and width are the same as the first metal plate, and its thickness can be set according to requirements. The mounting through holes are made of metal and consist of two sets of cylindrical sleeve structures for bolting and connection to the mounting base. The second metal rubber component is a rectangular flat plate, integrally cast. The second metal plate and the two mounting through holes are fastened together through a casting process. The length and width of the second metal rubber component are the same as the second metal plate, and its thickness can be set according to requirements.

[0010] This invention also provides an assembly method for the above-mentioned metal vibration damper with stepless stiffness adjustment, comprising the following steps: Step 1: Using the casting process of the first metal rubber part, the threaded mounting part and the first metal plate are fastened together to complete the fabrication of the upper mounting component; Step 2: Connect the first connecting boss to the first adjusting rail using welding, connect the second connecting boss to the second adjusting rail using welding, and use 4 sets of fastening bolts to fasten the first adjusting rail, 2 adjusting sliders and the second adjusting rail to complete the assembly of the stiffness adjustment component; Step 3: Using the casting process of the second metal rubber component, the second metal plate and the two mounting through holes are fastened together to complete the fabrication of the lower mounting component; Step 4: Connect the first connecting boss to the first metal plate by welding, and connect the second connecting boss to the second metal plate by welding to complete the overall installation of the shock absorber.

[0011] Beneficial effects This invention achieves stepless adjustment of the damper's stiffness within its maximum and minimum range by incorporating a stiffness adjustment component within the damper and utilizing the symmetrical movement of two metal-rubber adjustment sliders between the first and second adjustment tracks. This allows for precise adjustment of the stiffness based on the actual vibration excitation of the ship's mechanical equipment, ensuring the damper is always in its optimal vibration isolation state. This significantly improves the vibration isolation effect transmitted from the equipment's feet to the base, solving the technical problem of poor vibration isolation performance in existing fixed-stiffness dampers.

[0012] The vibration damper of this invention is designed with all-metal material, which has excellent radiation resistance and anti-aging properties, and can be adapted to special working environments such as radiation. Compared with traditional rubber vibration dampers, its service life is significantly extended, which is suitable for the long-term use needs of ship equipment.

[0013] The vibration damper of this invention has a regular structural design for each component. The components are fastened together through casting and welding processes, resulting in strong overall structural stability. The stiffness adjustment operation only requires adjusting the position of the adjustment slider and fixing it with fastening bolts. The adjustment method is flexible and convenient, facilitating rapid adjustment under on-site working conditions.

[0014] The length, width, thickness and other dimensions of each component of the vibration damper of the present invention can be flexibly set according to the actual equipment installation requirements, adapting to the installation interfaces and vibration reduction requirements of different ship mechanical equipment, and has strong versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a metal vibration damper with infinitely adjustable stiffness according to an embodiment of the present invention. Figure 2 This is a side view of the upper mounting component structure according to an embodiment of the present invention; Figure 3 This is a top view of the upper mounting component structure according to an embodiment of the present invention; Figure 4 This is a side view of the stiffness adjustment component structure according to an embodiment of the present invention; Figure 5 This is a top view of the stiffness adjustment component structure according to an embodiment of the present invention; Figure 6 This is a side view of the lower mounting component structure according to an embodiment of the present invention; Figure 7 This is a top view of the lower-level mounting component structure according to an embodiment of the present invention.

[0016] In the figure, 100-upper mounting component, 101-threaded mounting component, 102-first metal rubber component, 103-first metal plate; 200-stiffness adjustment component, 201-first connecting boss, 202-first adjusting rail, 203-fastening bolt, 204-adjusting slider, 205-second adjusting rail, 206-second connecting boss; 300-lower mounting component, 301-second metal plate, 302-mounting through hole, 303-second metal rubber component. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments are only used to explain the present invention and are not intended to limit the scope of protection of the present invention.

[0018] Example This embodiment provides a metal vibration damper with infinitely adjustable stiffness, such as... Figure 1 As shown, it includes an upper mounting assembly 100, a stiffness adjustment assembly 200, and a lower mounting assembly 300; the upper mounting assembly 100 is used to connect the equipment feet, the lower mounting assembly 300 is used to connect the mounting base, and the upper mounting assembly 100 and the lower mounting assembly 300 are welded together through the stiffness adjustment assembly 200.

[0019] like Figure 2 , Figure 3 As shown, the upper mounting assembly 100 includes a threaded mounting component 101, a first metal rubber component 102, and a first metal plate 103. The threaded mounting component 101 is a cylindrical metal structure with an internal threaded opening of M12, used for connection to the equipment via bolts. The first metal plate 103 is a rectangular flat plate structure with chamfered corners, and its length, width, and thickness are 120mm, 80mm, and 8mm, respectively. The first metal rubber component 102 is integrally cast from an upper cylindrical boss and a lower flat plate structure. During the casting process, the threaded mounting component 101 and the first metal plate 103 are fastened together through the casting process. The upper cylindrical boss of the first metal rubber component 102 has a diameter of 36mm and a thickness of 12mm, and the lower flat plate structure has the same length and width as the first metal plate 103, with a thickness of 8mm.

[0020] like Figure 4 , Figure 5As shown, the stiffness adjustment assembly 200 includes a first connecting boss 201, a first adjusting rail 202, a fastening bolt 203, two adjusting sliders 204, a second adjusting rail 205, and a second connecting boss 206. The first connecting boss 201 is a rectangular metal structure with a length equal to the width of the first metal plate 103, a width of 28 mm, and a thickness of 12 mm. The fastening bolt 203 consists of four sets of bolts and nuts, with an M8 bolt specification. Each bolt includes a bolt head and a threaded rod, and is used to fasten the first adjusting rail 206. 2. Adjusting slider 204 and second adjusting rail 205; the first adjusting rail 202 is a rectangular flat plate structure with chamfered corners. Its dimensions are the same as the first metal plate 103, and its thickness is 3mm. The first adjusting rail 202 has four sets of elongated openings, symmetrically positioned left-right and top-bottom. Each set of openings has two layers: the upper layer opening is 12mm wide and 1.2mm deep, used for bolt head recess installation; the lower layer opening is 8.5mm wide and 1.8mm deep, used for bolt head penetration. The screw; the adjusting sliders 204 are cuboids made of metal and rubber. The length of the two adjusting sliders 204 is the same as the length of the first connecting boss 201, the width is 16mm, and the thickness is 12mm. The two adjusting sliders 204 can move symmetrically along the elongated opening between the first adjusting track 202 and the second adjusting track 205. The second adjusting track 205 is a rectangular flat plate structure with chamfered corners. Its length and width are the same as the first adjusting track 202, and its thickness is 3mm. The second adjusting track 205 has four openings. The first adjustment rail 202 has a long strip-shaped opening, the position of which corresponds to the opening position on the first adjustment rail 202, and the opening width is 8.5mm; the second connecting boss 206 is a cuboid metal structure with the same dimensions as the first connecting boss 201; when the two adjusting sliders 204 are arranged close together to the minimum distance, the damper stiffness is at its maximum, and when the two adjusting sliders 204 are arranged far apart to the maximum distance, the damper stiffness is at its minimum. By adjusting the distance between the two adjusting sliders 204, the damper can be infinitely adjusted between the maximum and minimum stiffness.

[0021] like Figure 6 , Figure 7 As shown, the lower mounting assembly 300 includes a second metal plate 301, mounting through holes 302, and a second metal rubber component 303. The second metal plate 301 is a rectangular flat plate with chamfered corners. Its length and width are the same as the first metal plate 103, and its thickness is 8mm. The mounting through holes 302 are made of metal and consist of two sets of cylindrical sleeve structures. The opening size is M10, and the height is 8mm. They are used to pass through bolts and connect to the mounting base. The second metal rubber component 303 is a rectangular flat plate, integrally cast. The second metal plate 301 and the two mounting through holes 302 are fastened together by casting. The length and width of the second metal rubber component 303 are the same as the second metal plate 301, and its thickness is 8mm.

[0022] This embodiment also provides an assembly method for the above-mentioned metal vibration damper with stepless stiffness adjustment, including the following steps: Step 1: Using the first metal rubber part 102, the threaded mounting part 101 and the first metal plate 103 are cast and fastened together through a casting process to complete the fabrication of the upper mounting assembly 100; Step 2: Connect the first connecting boss 201 to the first adjusting rail 202 by welding, and connect the second connecting boss 206 to the second adjusting rail 205 by welding. Use 4 sets of M8 fastening bolts 203 to fasten the first adjusting rail 202, 2 adjusting sliders 204 and the second adjusting rail 205 to complete the assembly of the stiffness adjustment component 200. Step 3: Using the second metal rubber component 303, the second metal plate 301 and two mounting through holes 302 are cast and fastened together through a casting process to complete the fabrication of the lower mounting component 300; Step 4: Connect the first connecting boss 201 to the first metal plate 103 by welding, and connect the second connecting boss 206 to the second metal plate 301 by welding to complete the overall installation of the vibration damper.

[0023] The above description is only a preferred embodiment of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal vibration damper with infinitely adjustable stiffness, characterized in that, It includes an upper mounting assembly (100), a stiffness adjustment assembly (200), and a lower mounting assembly (300). The upper mounting assembly (100) is used to connect the equipment feet, and the lower mounting assembly (300) is used to connect the mounting base. The upper mounting assembly (100) and the lower mounting assembly (300) are connected through the stiffness adjustment assembly (200). The stiffness adjustment assembly (200) includes a first connecting boss (201), a first adjusting rail (202), a fastening bolt (203), two adjusting sliders (204), a second adjusting rail (205), and a second connecting boss (206). Multiple sets of elongated openings are correspondingly provided on the first adjustment track (202) and the second adjustment track (205); The two adjusting sliders (204) are made of metal rubber, are located between the first adjusting track (202) and the second adjusting track (205), and can move symmetrically along the elongated opening; The fastening bolt (203) passes through the elongated opening of the first adjusting rail (202), the adjusting slider (204), and the elongated opening of the second adjusting rail (205) in sequence, and fastens the three together. The damper stiffness can be infinitely adjusted between its maximum and minimum values ​​by symmetrically moving and fixing the distance between the two adjusting sliders (204).

2. The metal vibration damper with infinitely adjustable stiffness according to claim 1, characterized in that, The first connecting boss (201) is welded to the first adjusting rail (202), and the second connecting boss (206) is welded to the second adjusting rail (205); the first connecting boss (201) is welded to the upper mounting assembly (100), and the second connecting boss (206) is welded to the lower mounting assembly (300).

3. The metal vibration damper with infinitely adjustable stiffness according to claim 1 or 2, characterized in that, The upper mounting assembly (100) includes a threaded mounting component (101), a first metal rubber component (102), and a first metal plate (103); the first metal rubber component (102) fastens the threaded mounting component (101) and the first metal plate (103) together by a casting process.

4. The metal vibration damper with infinitely adjustable stiffness according to claim 3, characterized in that, The lower mounting assembly (300) includes a second metal plate (301), a mounting through hole (302), and a second metal rubber component (303); the second metal rubber component (303) is used to fasten the second metal plate (301) and the mounting through hole (302) together by a casting process.

5. The metal vibration damper with infinitely adjustable stiffness according to claim 1, characterized in that, The damper stiffness is at its maximum when the two adjusting sliders (204) are close to each other to the minimum distance; the damper stiffness is at its minimum when the two adjusting sliders (204) are far apart from each other to the maximum distance.

6. The metal vibration damper with infinitely adjustable stiffness according to claim 1, characterized in that, All components of the shock absorber are made of metal.

7. The metal vibration damper with infinitely adjustable stiffness according to claim 1, characterized in that, The length, width, and thickness of each plate structure in the upper mounting assembly (100), stiffness adjustment assembly (200), and lower mounting assembly (300) are set according to actual installation requirements.

8. The metal vibration damper with infinitely adjustable stiffness according to claim 3, characterized in that, The threaded mounting component (101) is a cylindrical metal structure with an internal thread opening; the first metal plate (103) is a rectangular flat plate structure with chamfered corners.

9. The metal vibration damper with infinitely adjustable stiffness according to claim 4, characterized in that, The mounting through hole (302) is a cylindrical sleeve structure; the second metal plate (301) is a rectangular flat plate structure with chamfered corners.

10. The metal vibration damper with infinitely adjustable stiffness according to claim 1, characterized in that, The elongated opening on the first adjusting track (202) has a two-layer structure. The width of the upper opening is used to allow the bolt head of the fastening bolt (203) to sink and be installed, and the width of the lower opening is used to pass through the screw of the fastening bolt (203); the width of the opening on the second adjusting track (205) is used to pass through the screw.

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