Efficient Vibration Reduction and Isolation Base Supported by Chained Panel Fluid Bladder

Abstract

The present disclosure provides an efficient vibration reduction and isolation base supported by a chained panel fluid bladder, including a chained panel, the vibration reduction fluid bladder, vertical limiting devices and a bottom plate. The chained panel is a discontinuous structure formed by connecting chained substructure panels in series by panel hinge devices. The vibration reduction fluid bladder and the vertical limiting devices are fixedly installed between the chained panel and the bottom plate. The chained panel is constructed based on the impedance mismatch principle and provided with a mechanical device. Mechanical vibration energy is dissipated twice by the chained panel and the vibration reduction fluid bladder, thereby greatly reducing influences of mechanical device operation on a hull structure. The present disclosure abandons a traditional base design of a continuous panel, is simple in structure and good in vibration reduction performance, and has good economy and wide application prospects.

Claims

1. An efficient vibration reduction and isolation base supported by a chained panel fluid bladder, comprising a bottom plate for installing a mechanical device, and a bottom plate used for being fixedly installed on a hull, wherein a vibration reduction fluid bladder and vertical limiting devices are installed between a panel and the bottom plate, and the vertical limiting devices surround the vibration reduction fluid bladder; the panel comprises panel hinge devices and chained substructure panels; the chained substructure panels are connected in series through the panel hinge devices, and a continuous body of the panel has structural mutation at a joint, resulting in structure impedance mismatch for isolating vibration waves and attenuating vibration.

2. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 1, wherein a vertical limiting device comprises a top cover plate, a fixing holder, a connection guide pillar and a pedestal, the top cover plate is installed at a bottom of the chained substructure panel, the pedestal is installed at a top of the bottom plate, and the fixing holder and the connection guide pillar limit displacement between the chained substructure panel and a base bottom plate to only happen in a vertical direction.

3. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 2, wherein a vibration reduction rubber sleeve is installed between the fixing holder and the connection guide pillar, and a bottom end of the connection guide pillar is provided with a lifting limiting baffle.

4. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 1, wherein the panel is a rectangular panel which is equally divided into a plurality of rectangular chained substructure panels in a length direction, a plurality of panel hinge devices arranged along a straight line are installed between adjacent plurality of rectangular chained substructure panels at equal intervals, and the straight line is perpendicular to an axis of the rectangular panel.

5. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 1, wherein the vibration reduction fluid bladder is a rectangular fluid bladder.

6. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 1, wherein vibration waves are transferred in the chained panel, only longitudinal waves are downwards transferred to fluid bladders and converted into surface waves in a fluid domain, and energy is mainly distributed on a fluid surface and outwards radiated in the form of acoustic waves, so as to reduce energy transferred to the base, and realize vibration attenuation.

7. The efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to claim 1, wherein when the mechanical device runs, mechanical vibration is downwards transferred to the chained substructure panel from machine legs, the vibration waves are attenuated in the chained substructure panel to a certain degree and then transferred to the vibration reduction fluid bladder, a liquid load in the fluid bladder dissipates structural vibration to a preset degree in the process, and an attenuated mechanical vibration is transferred to the hull through the base bottom plate, and thus, influences of mechanical device operation on vibration of the hull are reduced.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0017] FIG. 1 is an overall structure diagram of an efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to an example of the present disclosure;

[0018] FIG. 2 is a structure diagram of a chained panel in FIG. 1;

[0019] FIG. 3 is a structure diagram of the vibration reduction fluid bladder in FIG. 1;

[0020] FIG. 4 is a structure diagram of a vertical limiting device in FIG. 1;

[0021] FIG. 5 is a structure diagram of a base bottom plate in FIG. 1.

[0022] In the drawings: 1—mechanical device; 2—chained panel; 3—vibration reduction fluid bladder; 4—vertical limiting device; 5—base bottom plate; 6—panel hinge device; 7—chained substructure panel; 8—vertical limiting device top fixing hole; 9—mechanical device machine leg fixing hole; 10—fluid bladder; 11—fluid bladder fixing fence; 12—top cover plate; 13—fixing holder; 14—pedestal; 15—top fixing bolt hole; 16—vibration reduction rubber sleeve; 17—connection guide pillar; 18—lifting limiting baffle; 19—bottom fixing bolt hole; 20—bottom plate; 21—base fixing hole; 22—vertical limiting device lower fixing hole; and 23—base foot pad.

DETAILED DESCRIPTION OF THE DISCLOSURE

Example

[0023] An efficient vibration reduction and isolation base supported by a chained panel fluid bladder according to the example is shown in FIGS. 1 to 5, and the overall structure of the base is 1200 mm long, 600 mm wide and 180 mm high, and is mainly composed of four major structures including a chained panel 2, a vibration reduction fluid bladder 3, vertical limiting devices 4 and a base bottom plate 5, where the base bottom plate 5 is located at the very bottom of the base structure and is connected and fixed to a hull board, the base is integrally stable, and one vertical limiting device 4 is arranged at a center position of each side of the base bottom plate 5 for limiting a vertical height of the base; the vibration reduction fluid bladder 3 is arranged in a middle of the base bottom plate 5 to mainly play a vibration reduction and support role; the chained panel 2 is installed clinging to the vibration reduction fluid bladder 3 and is connected to the vertical limiting devices 4 to play a waveform conversion and vibration transfer role; finally, a mechanical device 1 is installed on the chained panel 2; and the structures and devices are connected through bolts, and the structure is simple, and convenient to dismount and mount.

[0024] According to design requirements, the overall structure of the chained panel 2 is 1200 mm long, 600 mm wide and 5 mm thick, and is formed by combining 5 chained substructure panels 7 and 16 sets of panel hinge devices 6. The chained substructure panel 7 is 220 mm long, 600 mm wide and 5 mm thick, and the panel hinge device 6 is 120 mm long and 90 mm wide, is composed of a left part and a right part and can be detached from a middle joint; 4 sets of panel hinge devices 6 are arranged in a long-side direction of the chained substructure panels 7 at equal intervals, and the panel hinge devices 6 and the chained substructure panels 7 are connected through welding; 4 sets of vertical limiting device top fixing holes 8 are formed in the 5 chained substructure panels 7, and the vertical limiting device top fixing holes 8 is formed by annularly arranging 6 bolt holes with the diameter being 8 mm; and meanwhile 6 mechanical device machine leg fixing holes 9 with the diameter being 14 mm are formed in the chained substructure panels 7.

[0025] According to design requirements, the overall structure of the vibration reduction fluid bladder 3 is 1000 mm long, 85 mm wide and 145 mm high, and is mainly composed of fluid bladders 10 and fluid bladder fixing fences 11. The fluid bladder fixing fences 11 are fixed to the base bottom plate 5 through welding, and chamfering treatment is performed on a plate edge, thereby avoiding liquid leakage due to scratch of the fluid bladders 10; and the fluid bladders 10 are arranged in the fluid bladder fixing fences 11 with tops clinging to the chained panel 2, thereby playing a vibration transfer role.

[0026] According to design requirements, the vertical limiting device 4 is 100 mm long, 60 mm wide and 145 mm high in a natural state, and is mainly composed of structures including a top cover plate 12, a fixing holder 13, a pedestal 14, top fixing bolt holes 15, a vibration reduction rubber sleeve 16, a connection guide pillar 17, a lifting limiting baffle 18 and bottom fixing bolt holes 19; the pedestal 14 and the fixing holder 13 are fixed through welding, and each of two sides of the pedestal 14 is provided with 3 bottom fixing bolt holes 19 with the diameter being 6 mm; the fixing holder 13 is of a hollow structure with a top through which a limiting body mechanism composed of the top cover plate 12, the connection guide pillar 17 and the lifting limiting baffle 18 penetrates, the top cover plate, the connection guide pillar and the lifting limiting baffle are all of a cylinder structure, have penetration lightening holes with the diameter being 12 mm in centers, and are fixed through welding; the top cover plate 12 is 50 m in diameter and 15 mm in height, and the 6 top fixing bolt holes 15 are formed in the top to be matched with vertical limiting device top fixing holes 8 of the chained panel 2; the connection guide pillar 17 is arranged below the top cover plate 12, and the connection guide pillar 17 is 25 mm in diameter and 55 mm in height; the lifting limiting baffle 18 being 45 mm in diameter and 12 mm in height is welded to a lower portion of the connection guide pillar 17; and the pedestal 14 and the fixing holder 13 are constantly kept to be fixed to the base bottom plate 5, the rest of structures can move relative to the pedestal, and when the device is not installed, the chained panel 2 cannot continue to ascend due to the lifting limiting baffle 18, in a similar way, when the device is installed and starts to run, the top cover plate 12 can limit downward maximum displacement of the chained panel 2 so as to guarantee structure safety, and ensure that the fluid bladders cannot be crushed.

[0027] According to design requirements, the base bottom plate 5 is 1200 mm long, 600 mm wide and 10 mm thick, and is provided with 12 base fixing holes 21 with the diameter being 14 mm for fixing between the overall structure of the base and the hull board; four sets, totally 24 vertical limiting device lower fixing holes 22 with the diameter being 6 mm are formed to realize connection between a bottom plate 20 and the vertical limiting devices 4; and four “L”-shaped base foot pads 23 are arranged at four corners of a bottom of the base plate to jack up the base to facilitate installation.

[0028] When the mechanical device 1 installed on the chained panel 2 runs and vibrates, vibration is transferred to the chained panel 2 from device machine legs, and due to discontinuous impedance of the chained panel 2, waves are transmitted and reflected at places with structural mutation, resulting in energy attenuation. One part of vibration is transferred by the chained panel 2 to the vibration reduction fluid bladder 3 clinging thereto, according to the waveform conversion theory and the energy level distribution principle, only longitudinal waves are transferred to the fluid bladders in a surface wave form in the process, vibration energy is mainly gathered on a fluid surface, and energy transferred to the base is greatly reduced; and the vertical limiting devices 4 play a vertical displacement limiting role, guarantee integral safety of the base, and can obviously reduce influences of mechanical device vibration on the hull structure.

[0029] Based on the impedance mismatch principle, the chained substructure panels are connected into the continuous chained panel by the panel hinge devices, the combined feature of mutation is achieved, transmission and reflection of elastic waves in the structure are intensified, and dissipation of vibration energy in the structure is increased. Due to two-time vibration reduction and dual attenuation by two chains and the fluid bladders, the influences of mechanical device operation on hull structure vibration are greatly reduced.

[0030] Specific features, structures, materials or characteristics combined with the example or demonstration are included in at least one example or demonstration of the present disclosure. In the specification, schematic statements of the above terms are not necessarily specific to the same example or demonstration. Moreover, the described specific features, structures, materials or characteristics can be properly combined in any one or more examples or demonstrations.

[0031] The present disclosure provides an idea and method of a chained structure for the ship vibration reduction base, there are specifically many methods and ways for implementing the technical schemes, and the described examples are a part rather than all of the examples of the present disclosure. Assemblies, described and shown in the drawings herein, in the examples of the present disclosure may be generally arranged and designed according to different configurations. Thus, the detailed description of the examples of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure required to be protected, but only represents the selected examples of the present disclosure. Those of ordinary skill in the art can understand that the examples can be variously changed, modified, replaced and transformed without departing from the principle and the purpose of the present disclosure, and the scope of the present disclosure is limited by the claims and equivalents thereof.