An annular rubber hydraulic vibration reduction platform

Abstract

The present invention relates to an annular rubber hydraulic vibration reduction platform, comprising a work surface, a vibration reduction rubber, an inner ring liquid chamber, a throttling ring, an outer ring limiting guard plate, an outer ring liquid chamber rubber membrane and an outer ring liquid chamber; the circular work surface is connected to the vibration reduction rubber, the outer ring side of the vibration reduction rubber is connected to the inner surface of the throttling ring, the outer ring liquid chamber rubber membrane is connected to the outer surface of the throttling ring, the outer side of the work surface, the vibration reduction rubber and the throttling ring together form an inner ring liquid chamber; the outer ring limiting guard plate is connected to the throttling ring, and the throttling ring and the outer ring liquid chamber rubber membrane together form an outer ring liquid chamber; the liquid chambers are filled with 80% ethylene glycol aqueous solution; the throttling ring is provided with a throttling channel, a flow channel inlet, a flow channel outlet and a throttling hole membrane. When vibration occurs, the ethylene glycol solution reciprocates through the throttling channel to provide hydraulic damping, and when the vibration frequency is high, the throttling hole membrane can significantly reduce the volume stiffness of the inner and outer chambers, resist the high-frequency dynamic hardening phenomenon of the vibration reduction structure, and significantly improve the vibration isolation effect.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental instruments, and in particular relates to a horizontal vibration reduction platform based on an annular rubber material structure providing elastic stiffness and an ethylene glycol solution providing damping. Background Art

[0002] Centrifuge equipment is the most common vibration source equipment in the laboratory. Due to its special structure and working principle, there is often an unbalanced centrifugal force in the working state, resulting in relatively serious vibration excitation in the horizontal direction. If it is not controlled, it may affect the physical and mental health of the experimenters and the working reliability of other precision instruments and equipment. At present, there are basically no effective vibration isolation measures for the above-mentioned vibration source equipment in medical or biological laboratories. Most of them are directly placed on the workbench, the ground or simply supported by simple rubber vibration isolation blocks to isolate vibration. Elastic elements such as rubber or springs often play the role of storing vibration energy in vibration reduction. Their damping is very small and basically cannot dissipate vibration energy. Therefore, this vibration isolation method has limited vibration reduction effect, and cannot meet the broadband vibration isolation requirements of 100Hz-3000Hz for general centrifuges. Therefore, it is very necessary to improve the vibration isolation measures and structures of centrifuge equipment in medical and biological laboratories so that it can better achieve vibration isolation effects. Summary of the invention

[0003] The purpose of the present invention is to provide a horizontal vibration reduction platform based on an annular rubber material structure to provide elastic stiffness and ethylene glycol solution to provide damping, so as to solve the problem of vibration isolation of instruments and equipment such as centrifuges in medical and biological laboratories.

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] An annular rubber hydraulic vibration reduction platform, mainly composed of a work surface 1, a vibration reduction rubber 2, an inner ring liquid chamber 3, a throttling ring 5, an outer ring limit guard plate 6, an outer ring liquid chamber rubber membrane 8, and an outer ring liquid chamber 9;

[0006] The work surface 1 is located in the center and is connected to the vibration damping rubber 2 by vulcanization; the outer ring side of the vibration damping rubber 2 is also connected to the inner surface of the throttle ring 5 by vulcanization; the outer ring liquid chamber rubber membrane 8 is connected to the outer surface of the throttle ring 5 by vulcanization bonding;

[0007] The outer side of the work surface 1, the vibration damping rubber 2 and the throttle ring 5 together form an inner ring liquid chamber 3; the throttle ring 5 and the outer ring liquid chamber rubber membrane 8 together form an outer ring liquid chamber 9; the inner ring liquid chamber 3 and the outer ring liquid chamber 9 are both filled with 80% ethylene glycol aqueous solution;

[0008] The outer ring limiting guard plate 6 is connected to the throttling ring 5 ; the throttling ring 5 is provided with a throttling channel 12 , a flow channel inlet 10 , a flow channel outlet 11 and a throttling hole membrane 4 .

[0009] Furthermore, the vibration-damping rubber 2 has two layers, an upper layer and a lower layer, which are both fixedly connected to the outer side of the work surface 1 by vulcanization.

[0010] Furthermore, the work surface 1 is circular, and the vibration-damping rubber 2, the outer ring limiting guard plate 6 and the outer ring liquid chamber rubber membrane 8 are all annular structures.

[0011] Furthermore, the outer ring limiting guard plate 6 is connected to the throttling ring 5 by 8 bolts and nuts 7 through 8 light holes evenly distributed on the circumferential edge below the throttling ring 5 and the outer ring limiting guard plate 6 .

[0012] Furthermore, six throttling channels 12 are evenly distributed on the throttling ring 5 for liquid to flow through.

[0013] Furthermore, six hollow throttling holes are evenly distributed on the throttling ring 5, and a throttling hole membrane 4 made of rubber material is embedded inside the throttling ring 5 so that the liquid in the inner ring liquid chamber 3 / outer ring liquid chamber 9 cannot flow through the throttling holes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The annular rubber hydraulic vibration reduction platform of the present invention adopts an annular rubber material structure to provide elastic stiffness. When vibration occurs, ethylene glycol solution reciprocates through the throttling channel to provide hydraulic damping. When the vibration frequency is high, the throttling hole membrane can significantly reduce the volume stiffness of the inner and outer chambers, resist the high-frequency dynamic hardening phenomenon of the vibration reduction structure, and the vibration isolation effect is significantly improved compared with a simple rubber material or spring vibration isolation system. The technologies used in the present invention are all realized through an annular structure or an annular uniformly distributed structure, which can effectively simplify the entire vibration reduction platform structure, improve its practicability and reliability, and effectively reduce manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the structure of an annular rubber hydraulic vibration reduction platform of the present invention;

[0018] Figure 2 A cross-sectional view of an implementation structure of the present invention;

[0019] Figure 3 This is a schematic diagram of a circular work surface of an implementation structure of the present invention;

[0020] Figure 4 This is a schematic diagram of an annular rubber structure of an implementation structure of the present invention;

[0021] Figure 5 A schematic diagram of an annular throttle plate in an implementation structure of the present invention;

[0022] Figure 6 A schematic diagram of a rubber membrane in an outer ring liquid chamber of an implementation structure of the present invention;

[0023] Figure 7 It is a schematic diagram of an outer ring limiting guard plate of an implementation structure of the present invention.

[0024] In the figure: 1. working table 2. vibration damping rubber 3. inner ring liquid chamber 4. throttling hole membrane 5. throttling ring 6. outer ring limit guard plate 7. fixing bolts and nuts 8. outer ring liquid chamber rubber membrane 9. outer ring liquid chamber 10. flow channel inlet 11. flow channel outlet 12. throttling channel. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with embodiments:

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1-Figure 7 As shown, the annular rubber hydraulic vibration reduction platform of the present invention is composed of a working table 1, an annular vibration reduction rubber 2, an inner ring liquid chamber 3, a throttling ring 5, an annular outer ring limiting guard plate 6, an annular outer ring liquid chamber rubber membrane 8, an outer ring liquid chamber 9, and a throttling channel 12, a flow channel inlet 10, a flow channel outlet 11 and a throttling hole membrane 4 located on the throttling ring.

[0029] The work surface 1 is located in the center and is connected to the vibration damping rubber 2 by vulcanization. The outer ring side of the vibration damping rubber 2 is also connected to the inner surface of the throttle ring 5 by vulcanization. The outer ring liquid chamber rubber membrane 8 is connected to the outer surface of the throttle ring 5 by vulcanization bonding. The vibration damping rubber 2 has a two-layer structure of upper and lower layers, both of which are fixedly connected to the outer side of the work surface 1 by vulcanization.

[0030] The outer ring limiting guard plate 6 is also an annular structure, and is connected to the throttling ring 5 by 8 bolts and nuts 7 through 8 light holes evenly distributed on the circumferential edge below the throttling ring 5 and the outer ring limiting guard plate 6.

[0031] The throttling ring 5 has six throttling channels 12 evenly distributed on it for the liquid to flow through. There are six throttling holes evenly distributed on the throttling ring 5. The throttling holes are hollow structures, and a throttling hole membrane 4 made of rubber material is embedded inside so that the liquid in the inner ring liquid chamber 3 / outer ring liquid chamber 9 cannot flow through the throttling holes. All liquid chambers are filled with 80% ethylene glycol aqueous solution.

[0032] The annular rubber hydraulic vibration reduction platform provided by the present invention can provide good vibration isolation performance for different vibration amplitudes and wide-band vibration frequencies, and can better meet the vibration isolation requirements of vibration source equipment such as centrifuges of various specifications in laboratories.

[0033] Example 1

[0034] A ring-shaped rubber hydraulic vibration reduction platform, in which a vibration source device is placed on a circular work surface 1. The outer side of the work surface 1 is connected to a ring-shaped vibration reduction rubber 2, which has an upper and lower layer structure, and is fixedly connected to the outer side of the work surface 1 by vulcanization. The outer side of the vibration reduction rubber 2 is a throttle ring 5, and the vibration reduction rubber 2 and the throttle ring 5 are also connected by vulcanization. In this way, the outer side of the work surface 1, the two-layer vibration reduction rubber 2 and the throttle ring 5 together form an annular space structure, which is the inner ring liquid chamber 3, and the chamber space is filled with 80% ethylene glycol aqueous solution. The outer side of the throttle ring 5 is vulcanized and connected to the outer ring liquid chamber rubber membrane 8, and the throttle ring 5 and the outer ring liquid chamber rubber membrane 8 together form an outer ring liquid chamber 9, and the chamber is also filled with 80% ethylene glycol aqueous solution. The outer ring limit guard plate 6 is located at the outermost side of the entire vibration reduction platform, and is bolted to the throttle ring 5 through 8 holes arranged around it, and finally forms a ring-shaped rubber hydraulic vibration reduction platform with good horizontal vibration isolation performance.

[0035] Specific implementation process and vibration isolation principle:

[0036] When the vibration source device placed on the work surface 1 generates vibration excitation, the vibration is transmitted to the annular vibration damping rubber 2 through the work surface, and the vibration damping rubber 2 undergoes elastic deformation to store vibration energy. At the same time, the inner ring liquid chamber 3 undergoes deformation. When the vibration frequency is low, the pressure difference inside the liquid is small, and the liquid basically only flows in the inner ring liquid chamber 3. The friction between the flowing liquid and the chamber wall produces energy loss, providing damping. When the vibration frequency is high, the local pressure difference inside the liquid is large, and part of the liquid flows between the inner / outer ring liquid chambers through the throttling channel 12. The throttling channel 12 is relatively narrow, and the resistance of the liquid flowing therein is greater, and the energy loss is greater, providing greater damping for the entire vibration damping platform, helping the vibration to decay rapidly. When the vibration frequency is further increased, due to the periodic change of the pressure difference between the inner / outer ring liquid chambers, the throttling hole membrane 4 undergoes periodic concave-convex changes, and its change frequency is equivalent to the vibration frequency. The deformation of the throttling hole membrane 4 can effectively reduce the volume stiffness of the liquid chamber, effectively reduce the stiffness of the vibration damping platform during high-frequency excitation, and suppress the high-frequency dynamic hardening phenomenon. In general, the annular rubber hydraulic vibration reduction platform provided by the present invention can meet the vibration isolation requirements under wide frequency band and large excitation.

[0037] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An annular rubber hydraulic vibration reduction platform, characterized in that: It is mainly composed of a working table (1), a vibration-damping rubber (2), an inner ring liquid chamber (3), a throttling ring (5), an outer ring limiting guard plate (6), an outer ring liquid chamber rubber membrane (8) and an outer ring liquid chamber (9); The work surface (1) is located at the center and is connected to the vibration-damping rubber (2) by vulcanization; the outer ring side of the vibration-damping rubber (2) is also connected to the inner surface of the throttle ring (5) by vulcanization; the outer ring liquid chamber rubber membrane (8) is connected to the outer surface of the throttle ring (5) by vulcanization bonding; The outer side of the work surface (1), the vibration-damping rubber (2) and the throttle ring (5) together form an inner ring liquid chamber (3); the throttle ring (5) and the outer ring liquid chamber rubber membrane (8) together form an outer ring liquid chamber (9); the inner ring liquid chamber (3) and the outer ring liquid chamber (9) are both filled with 80% ethylene glycol aqueous solution; The outer ring limiting guard plate (6) is connected to the throttling ring (5); the throttling ring (5) is provided with a throttling channel (12), a flow channel inlet (10), a flow channel outlet (11) and a throttling hole membrane (4); The vibration-damping rubber (2) has a two-layer structure, both of which are fixedly connected to the outer side of the work surface (1) by vulcanization; the work surface (1) is circular, and the vibration-damping rubber (2), the outer ring limit guard plate (6) and the outer ring liquid chamber rubber membrane (8) are all annular structures; the outer ring limit guard plate (6) is connected to the throttling ring (5) by 8 bolts and nuts (7) through 8 light holes evenly distributed on the circumferential edge below the throttling ring (5) and the outer ring limit guard plate (6); six throttling channels (12) are evenly distributed on the throttling ring (5) for liquid to flow through; the throttling ring (5) is evenly distributed with 6 hollow throttling holes, and a throttling hole membrane (4) made of rubber material is embedded inside the throttling ring so that the liquid in the inner ring liquid chamber (3) and the outer ring liquid chamber (9) cannot flow through the throttling holes; When the vibration source device placed on the work surface (1) generates vibration excitation, the vibration is transmitted to the vibration-damping rubber (2) through the work surface, and the vibration-damping rubber (2) undergoes elastic deformation to store vibration energy. At the same time, the inner ring liquid chamber (3) undergoes deformation. When the vibration frequency is low, the pressure difference inside the liquid is small, and the liquid basically only flows in the inner ring liquid chamber (3). The friction between the flowing liquid and the chamber wall produces energy loss, providing damping. When the vibration frequency is high, the local pressure difference inside the liquid is large, and part of the liquid flows between the inner / outer ring liquid chambers through the throttling channel (12). The throttling channel (12) is relatively narrow, and the resistance of the liquid when flowing therein is large, resulting in high energy loss, providing greater damping for the entire vibration-damping platform, helping the vibration to decay quickly. When the vibration frequency increases, the pressure difference between the inner and outer ring liquid chambers changes periodically, causing the throttling hole membrane (4) to undergo periodic concave-convex changes, and the change frequency is equivalent to the vibration frequency.

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