A combined vibration damping pedestal and mounting method

Abstract

The application provides a combined damping base and mounting method, which comprises an upper support and a lower base connected through fasteners, a damping rubber pad arranged between the contact surfaces of the upper and lower bases, and a central hole arranged in the upper support, wherein a sound source device passes through the central hole and is connected and fastened with the upper support, and the upper and lower bases are both two half splicing structures. The application adopts a combined structure, is connected and assembled through bolts, can be quickly disassembled and assembled, has reduced overall weight and cost, and has good damping effect.

Description

Technical Field

[0001] This application relates to the technical field of acoustic design of ship structures, specifically to a combined vibration damping base and its installation method. Background Technology

[0002] Modern ships have increasingly higher requirements for vibration and noise control. In ship design, effective vibration reduction measures must be taken for sound source equipment to reduce the transmission of equipment vibration along the mounting base to the hull structure, thereby reducing vibration noise in ship cabins and underwater radiated noise.

[0003] Pump units, as widely present noise sources on ships, are a key source of vibration and noise that must be addressed in ship design. Often, due to overall resource and cost constraints, only single-stage vibration isolation is adopted, which has limited effect on equipment vibration reduction. Optimizing the base design with less overall resource consumption (weight and cost) to further improve the base's vibration reduction effect would be highly beneficial for improving the vibration and noise environment of ships. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a combined vibration damping base and installation method to address the above-mentioned problems, thereby further improving the vibration damping effect of the base while consuming less overall resources (weight and cost).

[0005] The embodiments of this application are implemented as follows:

[0006] This application provides a combined vibration damping base, characterized in that it includes an upper support and a lower base connected by fasteners, a damping rubber pad is provided between the contact surfaces of the upper support and the lower base, the upper support has a central opening, and a sound source device passes through the central opening and is connected and fastened to the upper support.

[0007] In some alternative implementations, the upper support is a metal frame structure formed by welding an upper top plate, an upper bottom plate, an upper web plate, and multiple upper elbow plates; the lower base is a metal frame structure formed by welding a lower top plate, a lower web plate, and multiple lower elbow plates.

[0008] In some alternative embodiments, the upper support is composed of a front half support and a rear half support with symmetrical openings connected by fasteners to form the complete central opening.

[0009] In some alternative implementations, the lower base includes a left half-base and a right half-base, which are symmetrically welded and fixed to the hull structure, and the top is connected to the upper support.

[0010] In some optional implementations, the upper support has multiple upper elbow plates evenly spaced apart, with the upper elbow plates welded at the opening joint as a reference, and the multiple upper elbow plates are equidistant from both sides; the lower support has multiple lower elbow plates evenly spaced apart, with the opening joint of the upper support as the center of symmetry, and the multiple lower elbow plates are symmetrically arranged in pairs.

[0011] In some alternative implementations, the upper support and lower base are made of steel or aluminum alloy, with the plate thickness determined based on the plate thickness selection principle for different materials.

[0012] In some alternative implementations, when the upper support and lower base are made of steel, the principle for selecting the plate thickness is as follows:

[0013] A1. When the weight of the sound source equipment is ≤100kg, the thickness of the top plate t1 is 5mm, the thickness of the bottom plate t2 is 6mm, the thickness of the upper elbow plate welded at the opening of the upper support is 5mm, and the thickness of other plates is 4mm.

[0014] A2. When the weight of the sound source equipment is 100kg to 300kg, the thickness of the top plate t1 is 6mm, the thickness of the bottom plate t2 is 7mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 6mm, and the thickness of other plates is 5mm.

[0015] A3. When the weight of the sound source equipment is 300kg to 500kg, the thickness of the top plate t1 is 8mm, the thickness of the bottom plate t2 is 10mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 8mm, and the thickness of other plates is 6mm.

[0016] A4. When the weight of the sound source equipment is 500kg to 1000kg, the thickness of the top plate t1 is 10mm, the thickness of the bottom plate t2 is 12mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 10mm, and the thickness of other plates is 8mm.

[0017] A5. When the weight of the sound source equipment is 1000kg to 2000kg, the thickness of the top plate t1 is 12mm, the thickness of the bottom plate t2 is 14mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 10mm, and the thickness of other plates is 10mm.

[0018] A6. When the weight of the sound source equipment is 2000kg to 5000kg, the thickness of the top plate t1 is 16mm, the thickness of the bottom plate t2 is 18mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 12mm, and the thickness of other plates is 12mm.

[0019] A7. When the weight of the sound source equipment is ≥5000kg, the thickness of the top plate t1 is 18mm, the thickness of the bottom plate t2 is 20mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 14mm, and the thickness of other plates is 14mm.

[0020] In some alternative implementations, when the upper support and lower base are made of aluminum alloy, the selection principle for the plate thickness is as follows:

[0021] B1. When the weight of the sound source equipment is ≤100kg, the thickness of the top plate t1 is 6mm~8mm, the thickness of the bottom plate t2 is 7mm~9mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 6mm~8mm, and the thickness of other plates is 5mm~7mm.

[0022] B2. When the weight of the sound source equipment is 100kg to 300kg, the thickness of the top plate t1 is 7mm to 9mm, the thickness of the bottom plate t2 is 8mm to 10mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 7mm to 9mm, and the thickness of other plates is 6mm to 8mm.

[0023] B3. When the weight of the sound source equipment is 300kg to 500kg, the thickness t1 of the top plate is 9mm to 11mm, the thickness t2 of the bottom plate is 11mm to 13mm, the thickness t3 of the upper elbow plate welded at the opening of the upper support is 9mm to 11mm, and the thickness of other plates is 7mm to 9mm.

[0024] B4. When the weight of the sound source equipment is 500kg to 1000kg, the thickness of the top plate t1 is 11mm to 13mm, the thickness of the bottom plate t2 is 13mm to 15mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 11mm to 13mm, and the thickness of other plates is 9mm to 11mm.

[0025] B5. When the weight of the sound source equipment is 1000kg to 2000kg, the thickness of the top plate t1 is 13mm to 15mm, the thickness of the bottom plate t2 is 15mm to 17mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 11mm to 13mm, and the thickness of other plates is 11mm to 13mm.

[0026] B6. When the weight of the sound source equipment is 2000kg to 5000kg, the thickness of the top plate t1 is 17mm to 19mm, the thickness of the bottom plate t2 is 19mm to 21mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 13mm to 15mm, and the thickness of other plates is 13mm to 15mm.

[0027] B7. When the weight of the sound source equipment is ≥5000kg, the thickness of the top plate t1 is 19mm~21mm, the thickness of the bottom plate t2 is 21mm~23mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 15mm~17mm, and the thickness of other plates is 15mm~17mm.

[0028] In some optional embodiments, the distance between the web plates on both sides of the upper support and the web plates on both sides of the lower support located on the same side is 50mm≤h1≤150mm; with the upper elbow plate welded at the opening joint as the center, the distance between the two lower elbow plates on the lower support closest to the center and the center is 50mm≤h2≤150mm; the distance between the remaining lower elbow plates of the lower support and the corresponding upper elbow plates is 50mm≤h3≤150mm.

[0029] A method for installing a combined vibration damping base, characterized by comprising the following steps:

[0030] Step a: Weld the left and right halves of the lower support to the hull structure according to the positioning. Then, hoist the front half of the upper support above the lower support. Place multiple damping rubber pads between the upper and lower supports and use bolts to fasten the front half of the support to the lower support.

[0031] Step b: Hoist the sound source device to the opening of the front support, then hoist the rear support to the top of the lower support. Place multiple damping rubber pads between the rear support and the lower support. Connect the rear support to the front support and the lower support with bolts. Then fasten the sound source device to the upper support with bolts.

[0032] Step c: Loosen the bolts connecting the upper and lower supports to allow them to be in a free state. Measure the height of the damping rubber pad in this state. Then, tighten the bolts while measuring the height of the damping rubber pad to ensure that the compression of the damping rubber pad is 4% to 6%. This completes the assembly of the combined vibration damping base.

[0033] The beneficial effects of this application are as follows: The combined vibration damping base and installation method provided by this application fully consider the installation, maintenance and upkeep needs of the sound source equipment. The upper support is assembled by bolt connection, which can realize quick assembly and disassembly. The whole is a metal welded frame structure, which reduces the overall resource consumption (weight and cost) and has good vibration damping performance. It has a vibration damping effect of 3 to 15 dB across the entire frequency band, and the vibration damping effect in the high frequency band can reach more than 15 dB. At the same time, the plate thickness can be adapted to the size, weight and other parameters of the sound source equipment, which has wide applicability. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a front view of the installation according to an embodiment of this application;

[0036] Figure 2 This is an installation side view of an embodiment of this application;

[0037] Figure 3 This is a top view of the upper support in an embodiment of this application;

[0038] Figure 4 This is a top view of the lower support according to an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of the structure of the vibration damping base according to an embodiment of this application;

[0040] Figure 6 This is a schematic diagram showing the connection between the upper support and the lower support in an embodiment of this application. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0049] Many sound-generating devices on board, such as pump sets, are mounted at the waist. The pump body at the lower end is too large, far exceeding the opening size that can be made in the base panel. Conventional base designs cannot achieve vibration reduction. Improved and optimized designs for these bases need to consider the installation, maintenance, and upkeep requirements of the pump sets, while also providing a certain degree of vibration reduction.

[0050] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, based on this, the present invention proposes a combined vibration damping base, including an upper support 1 and a lower base 2 connected by fasteners. A damping rubber pad 3 is provided between the contact surfaces of the upper support and the lower base. The upper support is provided with a central opening 4. A sound source device 5 passes through the central opening and is connected and fastened to the upper support.

[0051] The upper support is a metal plate frame structure formed by welding an upper top plate 6, an upper bottom plate 7, an upper web plate 8 and multiple upper elbow plates 9; the lower base is a metal plate frame structure formed by welding a lower top plate 10, a lower web plate 11 and multiple lower elbow plates 12.

[0052] like Figure 3 As shown, the upper support is composed of a front half support 13 and a rear half support 14 with symmetrical openings connected by fasteners to form a complete central opening. Bolts can be used as fasteners.

[0053] like Figure 4 As shown, the lower base includes a left half base 15 and a right half base 16. The left half base and the right half base are symmetrically welded and fixed to the hull structure 17, and the top is connected to the upper support.

[0054] The modular vibration damping base has a compact structure that allows for quick disassembly and installation. At the same time, the welded metal frame structure is lightweight and low in cost.

[0055] The upper support has multiple upper elbow plates evenly spaced apart, with the upper elbow plates welded at the opening joint as the reference, and the multiple upper elbow plates are arranged equidistantly to both sides; the lower support has multiple lower elbow plates evenly spaced apart, with the opening joint of the upper support as the center of symmetry, and the multiple lower elbow plates are arranged symmetrically in pairs.

[0056] The upper support and lower base are made of steel or aluminum alloy, and the plate thickness is determined based on the plate thickness selection principle for different materials.

[0057] When the upper support and lower base are made of steel, the selection principle for plate thickness is as follows (Table 1):

[0058] Table 1. Selection Principles for the Thickness of Combined Vibration Damping Base Plate

[0059]

[0060]

[0061] Where: t1 is the thickness of the top plate, t2 is the thickness of the bottom plate, and t3 is the thickness of the upper elbow plate welded at the opening of the upper support.

[0062] When the upper support and lower base are made of steel, the thickness of each plate is selected as 1-3 mm more than that in Table 1 above.

[0063] The corresponding plate thickness can be selected and modified according to the parameters in Table 1 based on the size, weight and other parameters of the sound source equipment.

[0064] To ensure better vibration reduction of the base, the spacing between the base web and the elbow plate also needs to be specifically designed: the spacing between the webs on both sides of the upper support and the webs on both sides of the lower support located on the same side is 50mm≤h1≤150mm; taking the upper elbow plate welded at the opening joint as the center, the spacing between the two lower elbow plates on the lower support closest to the center and the center is 50mm≤h2≤150mm; the spacing between the remaining lower elbow plates of the lower support and the corresponding upper elbow plates is 50mm≤h3≤150mm.

[0065] The aforementioned combined vibration damping base has good vibration damping performance, with a vibration damping effect of 3 to 15 dB across the entire frequency band, and a vibration damping effect of more than 15 dB in the high-frequency band.

[0066] Example 1

[0067] When installing the above-mentioned combined vibration damping base, the installation sequence is as follows:

[0068] 1. Install the lower support: First, weld the left and right halves of the lower support to the hull structure according to the positioning.

[0069] 2. Install the upper support: hoist the front half of the upper support above the lower support, place multiple damping rubber pads between the upper and lower supports, and use bolts to fasten the front half of the support to the lower support.

[0070] 3. Assemble the upper support: hoist the source equipment to the opening of the front support, then hoist the rear support to the top of the lower support. Place multiple damping rubber pads between the rear support and the lower support. Connect the rear support to the front support and the lower support with bolts.

[0071] 4. Install the sound source equipment: Secure the sound source equipment to the upper support with bolts;

[0072] 5. Adjust the tightness of the upper and lower support connecting bolts: Loosen the bolts to allow them to be in a free state, measure the height of the damping rubber pad in this state, and then tighten the bolts while measuring the height of the damping rubber pad to ensure that the compression of the damping rubber pad is 4% to 6%, thus completing the assembly of the combined vibration damping base.

[0073] The above description represents only a preferred embodiment of this intellectual property, but the intellectual property should not be limited to the content disclosed in this embodiment and the accompanying drawings. All equivalents or modifications made without departing from the spirit of this invention fall within the scope of protection of this invention.

Claims

1. A combined vibration damping base, characterized in that, The device includes an upper support and a lower base connected by fasteners. A damping rubber pad is provided between the contact surfaces of the upper support and the lower base. The upper support has a central opening through which the sound source device passes and is connected and fastened to the upper support. The upper support is a metal frame structure formed by welding an upper top plate, an upper bottom plate, an upper web plate, and multiple upper elbow plates. The lower base is a metal frame structure formed by welding a lower top plate, a lower web plate, and multiple lower elbow plates. The upper support consists of a front half support and a rear half support with symmetrical openings connected by fasteners to form the complete central opening; the lower base includes a left half base and a right half base, which are symmetrically welded and fixed to the hull structure, and the top of the left half base is connected to the upper support.

2. The combined vibration damping base according to claim 1, characterized in that, The upper support has multiple upper elbow plates evenly spaced apart, with the upper elbow plates welded at the opening joint as the reference, and the multiple upper elbow plates are arranged equidistantly to both sides; the lower base has multiple lower elbow plates evenly spaced apart, with the multiple lower elbow plates arranged symmetrically in pairs with the opening joint of the upper support as the center of symmetry.

3. The combined vibration damping base according to claim 2, characterized in that, The upper support and lower base are made of steel or aluminum alloy, and the plate thickness is determined based on the plate thickness selection principle for different materials.

4. The combined vibration damping base according to claim 3, characterized in that, When the upper support and lower base are made of steel, the principle for selecting the plate thickness is as follows: A1. When the weight of the sound source equipment is ≤100kg, the thickness of the top plate t1 is 5mm, the thickness of the bottom plate t2 is 6mm, the thickness of the upper elbow plate welded at the opening of the upper support is 5mm, and the thickness of other plates is 4mm. A2. When the weight of the sound source equipment is 100kg to 300kg, the thickness of the top plate t1 is 6mm, the thickness of the bottom plate t2 is 7mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 6mm, and the thickness of other plates is 5mm. A3. When the weight of the sound source equipment is 300kg to 500kg, the thickness t1 of the top plate is 8mm, the thickness t2 of the bottom plate is 10mm, the thickness t3 of the upper elbow plate welded at the opening of the upper support is 8mm, and the thickness of other plates is 6mm. A4. When the weight of the sound source equipment is 500kg to 1000kg, the thickness of the top plate t1 is 10mm, the thickness of the bottom plate t2 is 12mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 10mm, and the thickness of other plates is 8mm. A5. When the weight of the sound source equipment is 1000kg to 2000kg, the thickness of the top plate t1 is 12mm, the thickness of the bottom plate t2 is 14mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 10mm, and the thickness of other plates is 10mm. A6. When the weight of the sound source equipment is 2000kg to 5000kg, the thickness of the top plate t1 is 16mm, the thickness of the bottom plate t2 is 18mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 12mm, and the thickness of other plates is 12mm. A7. When the weight of the sound source equipment is ≥5000kg, the thickness of the top plate t1 is 18mm, the thickness of the bottom plate t2 is 20mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 14mm, and the thickness of other plates is 14mm.

5. A combined vibration damping base according to claim 3 or 4, characterized in that, When the upper support and lower base are made of aluminum alloy, the principle for selecting the plate thickness is as follows: B1. When the weight of the sound source equipment is ≤100kg, the thickness of the top plate t1 is 6mm~8mm, the thickness of the bottom plate t2 is 7mm~9mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 6mm~8mm, and the thickness of other plates is 5mm~7mm. B2. When the weight of the sound source equipment is 100kg to 300kg, the thickness of the top plate t1 is 7mm to 9mm, the thickness of the bottom plate t2 is 8mm to 10mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 7mm to 9mm, and the thickness of other plates is 6mm to 8mm. B3. When the weight of the sound source equipment is 300kg to 500kg, the thickness of the top plate t1 is 9mm to 11mm, the thickness of the bottom plate t2 is 11mm to 13mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 9mm to 11mm, and the thickness of other plates is 7mm to 9mm. B4. When the weight of the sound source equipment is 500kg to 1000kg, the thickness t1 of the top plate is 11mm to 13mm, the thickness t2 of the bottom plate is 13mm to 15mm, the thickness t3 of the upper elbow plate welded at the opening of the upper support is 11mm to 13mm, and the thickness of other plates is 9mm to 11mm. B5. When the weight of the sound source equipment is 1000kg to 2000kg, the thickness of the top plate t1 is 13mm to 15mm, the thickness of the bottom plate t2 is 15mm to 17mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 11mm to 13mm, and the thickness of other plates is 11mm to 13mm. B6. When the weight of the sound source equipment is 2000kg to 5000kg, the thickness t1 of the top plate is 17mm to 19mm, the thickness t2 of the bottom plate is 19mm to 21mm, the thickness t3 of the upper elbow plate welded at the opening of the upper support is 13mm to 15mm, and the thickness of other plates is 13mm to 15mm. B7. When the weight of the sound source equipment is ≥5000kg, the thickness of the top plate t1 is 19mm~21mm, the thickness of the bottom plate t2 is 21mm~23mm, the thickness of the upper elbow plate welded at the opening of the upper support t3 is 15mm~17mm, and the thickness of other plates is 15mm~17mm.

6. A combined vibration damping base according to claim 5, characterized in that, The distance between the web plates on both sides of the upper support and the web plates on both sides of the lower base located on the same side is 50mm≤h1≤150mm; with the upper elbow plate welded at the opening joint as the center, the distance between the two lower elbow plates on the lower base closest to the center and the center is 50mm≤h2≤150mm; the distance between the remaining lower elbow plates of the lower base and the corresponding upper elbow plates is 50mm≤h3≤150mm.

7. The installation method of the combined vibration damping base according to claim 2, characterized in that, Includes the following steps: Step a: Weld the left and right halves of the lower base to the hull structure according to the positioning. Then, hoist the front half of the upper support to the top of the lower base. Place multiple damping rubber pads between the upper support and the lower base, and use bolts to fasten the front half of the support to the lower base. Step b: Hoist the sound source device to the opening of the front half support, then hoist the rear half support to the top of the lower base, place multiple damping rubber pads between the rear half support and the lower base, connect the rear half support to the front half support and the lower base with bolts, and then fasten the sound source device to the upper support with bolts. Step c: Loosen the bolts connecting the upper support and the lower base to allow them to be in a free state. Measure the height of the damping rubber pad in this state. Then, tighten the bolts while measuring the height of the damping rubber pad to ensure that the compression of the damping rubber pad is 4%~6%. This completes the assembly of the combined vibration damping base.

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