A swing-resistant vertical vibration isolator of the inerter type

Abstract

The application discloses a kind of inertial type anti-sway vertical vibration isolator, including top plate, bottom plate and the vibration isolation component being arranged between top plate and bottom plate, the vibration isolation component includes: a plurality of limiting the lateral displacement of top plate and bottom plate vertical guide rod component;Rotary inertial mass damper is provided with damping in vertical direction for vertical vibration isolator, the top end and bottom end of rotary inertial mass damper are connected with top plate and bottom plate respectively, a plurality of elastic members are connected on top plate and bottom plate respectively, and the elastic member provides reset stiffness for vertical vibration isolator, to prevent vertical vibration isolator from being damaged by larger displacement rotary inertial mass damper.The application simultaneously has pre-tightening force, vertical stiffness, horizontal bending resistance, vertical damping and inertial force, to ensure that equipment can play effective shock-absorbing effect in vertical direction.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology, and in particular to an inertial capacitive anti-sway vertical vibration isolator. Background Technology

[0002] External excitations such as earthquakes, subway vibrations, human-induced vibrations, and equipment vibrations can all affect structural safety and comfort. To reduce vertical vibrations, rubber and springs are widely used for vertical vibration isolation. Traditional vertical vibration isolators primarily achieve excellent excitation shielding by changing stiffness, but increased damping energy dissipation increases the control frequency domain. From the perspective of basic dynamic theory, previous vibration isolation was based on displacement and velocity control. Under excitation, existing horizontal vibration isolation devices, due to their own deformation and sliding, cause periodic up-and-down movement of the isolator, leading to amplification of vertical vibrations in the structure, thus forming a separate three-dimensional vibration isolation device.

[0003] Therefore, although Chinese patent application publication number CN116816846A discloses a vertical vibration isolation / vibration device based on a composite disc spring, and Chinese patent application publication number CN116837974A discloses a three-dimensional vibration isolation support with dual vibration control, neither of these patents possesses rotational inertia and cannot simultaneously possess preload, vertical stiffness, horizontal bending resistance, vertical damping, and inertial force, resulting in low vibration reduction efficiency in the vertical direction. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings and defects of the prior art by providing an inertial capacitance type anti-sway vertical vibration isolator to solve the above-mentioned problems.

[0005] The technical problem solved by this invention can be achieved by the following technical solutions:

[0006] A capacitive anti-sway vertical vibration isolator includes a top plate, a bottom plate, and a vibration isolation assembly disposed between the top plate and the bottom plate, wherein the vibration isolation assembly includes:

[0007] Several vertical guide rod assemblies that restrict lateral displacement of the top and bottom plates;

[0008] A rotating inertial container that provides damping in the vertical direction for vertical vibration isolators, wherein the top and bottom ends of the rotating inertial container are connected to a top plate and a bottom plate, respectively.

[0009] Several elastic elements are connected at both ends to the top plate and the bottom plate respectively. The elastic elements provide the reset stiffness of the vertical vibration isolator to prevent the vertical vibration isolator from being damaged by large displacement.

[0010] In a preferred embodiment of the present invention, the rotary inertial container includes a cylinder and a rotary impeller rotatably disposed within the cylinder. The top and / or bottom of the rotary impeller is connected to a ball screw nut. A through hole is provided in the middle of the rotary impeller for a ball screw to pass through. The ball screw and the ball screw nut cooperate to form a kinematic pair. The top of the ball screw is connected to the top plate, and the bottom plate is connected to the bottom of the ball screw or the bottom of the cylinder. A damping medium is disposed within the cylinder to prevent the rotary impeller from rotating.

[0011] In a preferred embodiment of the present invention, the rotating impeller and the ball nut are connected by a groove.

[0012] In a preferred embodiment of the present invention, the cylinder body includes a cylinder barrel, a cylinder top plate, and a cylinder bottom plate. The cylinder top plate and the cylinder bottom plate are provided with circular holes in the middle for the top and bottom of a rotating impeller to pass through. The top and bottom of the rotating impeller are respectively connected to the cylinder top plate and the cylinder bottom plate through bearings.

[0013] In a preferred embodiment of the present invention, the damping medium comprises silicone oil.

[0014] In a preferred embodiment of the present invention, the elastic element includes a spring, and the top plate and the bottom plate are respectively provided with an upper spring base and a lower spring base that cooperate with the two ends of the spring. The two ends of the spring are respectively sleeved on the upper spring base and the lower spring base, and the height of the upper spring base and the lower spring base exceeds 15% of the total length of the spring.

[0015] In a preferred embodiment of the present invention, the elastic element comprises four groups, which are evenly distributed circumferentially around the outer periphery of the rotating inertial container.

[0016] In a preferred embodiment of the present invention, the vertical guide rod assembly includes a guide rod fixed on the top plate and a guide sleeve fixed on the bottom plate, the guide rod being inserted into the guide sleeve, and the outer diameter of the guide rod being adapted to the inner diameter of the guide sleeve.

[0017] In a preferred embodiment of the present invention, the top end of the guide rod is beveled, and the guide rod is fixed to the top plate by bevel welding; the bottom end of the guide sleeve is beveled, and the guide sleeve is fixed to the bottom plate by bevel welding.

[0018] In a preferred embodiment of the present invention, the vertical guide rod assembly comprises two sets, symmetrically distributed on both sides of the rotating inertial container.

[0019] By employing the above technical solutions, compared to existing technologies, this invention simultaneously possesses preload, vertical stiffness, horizontal bending resistance, vertical damping, and inertial force, ensuring that the equipment can effectively reduce vibration in the vertical direction. 1. The presence of the rotating inertial container provides high damping in the vertical direction, enhancing the structure's vibration reduction effect; 2. The parallel connection of multiple elastic elements provides high stiffness in the vertical direction, increasing the displacement of the vertical isolator; 3. The presence of the vertical guide rod assembly ensures that the vertical isolator only moves in a single degree of freedom in the vertical direction, preventing lateral swaying and enhancing the structure's vibration reduction effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention.

[0022] Figure 2 This is a longitudinal sectional view of one embodiment of the present invention.

[0023] Figure 3 This is a front view of a rotating inertial container according to an embodiment of the present invention.

[0024] Figure 4 for Figure 3 AA sectional view.

[0025] Figure 5 This is a top view of a rotary inertial container after the cylinder body has been removed, according to an embodiment of the present invention.

[0026] Figure 6 for Figure 5 A three-dimensional image.

[0027] Figure 7 This is a schematic diagram of the structure of a vertical guide rod assembly according to an embodiment of the present invention. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention is further described below.

[0029] See Figures 1 to 7The illustrated inertial capacitive anti-sway vertical vibration isolator includes a top plate 100, a bottom plate 200, and a vibration isolation assembly 300 disposed between the top plate 100 and the bottom plate 200. The vibration isolation assembly 300 includes several vertical guide rod assemblies 310, a rotary inertial container 320, and several elastic elements 330.

[0030] The rotating inertia container 320 provides damping in the vertical direction for this invention. The top and bottom ends of the rotating inertia container 320 are connected to the top plate 100 and the bottom plate 200, respectively. In this embodiment, the rotating inertia container 320 includes a cylinder 321 and a rotating impeller 322 rotatably disposed within the cylinder. The top end of the rotating impeller 322 is connected to a ball nut 323; alternatively, the bottom end of the rotating impeller 322 can also be connected to a ball nut, depending on the requirements. The rotating impeller 322 and the ball nut 323 are connected by a slot, with the ball nut 323 secured in the slot by screws. A through hole 325 is provided in the middle of the rotating impeller 322 for a ball screw 324 to pass through. The ball screw 324 and the ball nut 323 cooperate to form a kinematic pair. The top of the ball screw 324 is connected to the top plate 100, and the bottom plate 200 is connected to the bottom of the ball screw 324 or the bottom of the cylinder 321. In this embodiment, the bottom plate 200 is connected to the bottom of the cylinder 321. The bottom of the cylinder 321 has six threaded holes evenly distributed, and the bottom plate 200 also has six threaded holes evenly distributed. The rotating inertial container is fixed to the bottom plate 200 with screws. A damping medium 327 is provided inside the cylinder 321 to prevent the rotating impeller 322 from rotating. In this embodiment, the damping medium 327 is high-viscosity silicone oil.

[0031] The cylinder body 321 includes a cylinder barrel 321a, a cylinder top plate 321b, and a cylinder bottom plate 321c. The cylinder top plate 321b and the cylinder bottom plate 321c are provided with round holes in the middle for the top and bottom of the rotating impeller 322 to pass through. The top and bottom of the rotating impeller 322 are connected to the cylinder top plate 321b and the cylinder bottom plate 321c respectively through bearings 326, so that the rotating impeller 322 can rotate inside the cylinder body 321.

[0032] The vertical guide rod assembly 310 is used to limit the lateral displacement of the top plate 100 and the bottom plate 200. In this embodiment, the vertical guide rod assembly 310 includes a guide rod 311 fixed to the top plate 100 and a guide sleeve 312 fixed to the bottom plate 200. Two sets of vertical guide rod assemblies 310 are provided, symmetrically distributed on both sides of the rotating inertial container 320. The guide rod 311 is inserted into the guide sleeve 312, and the outer diameter of the guide rod 311 matches the inner diameter of the guide sleeve 312. The guide rod 311 and the guide sleeve 312 are smoothly connected, allowing the guide rod 311 to slide freely within the guide sleeve 312. The lengths of the guide rod 311 and the guide sleeve 312 are determined by the stroke of the vertical vibration isolator. When the vertical vibration isolator is subjected to a lateral force, the vertical guide rod assembly 310 generates a reverse supporting force to prevent lateral displacement of the vertical vibration isolator. In this embodiment, the top end of the guide rod 311 is beveled, and the guide rod 311 is fixed to the top plate 100 by bevel welding; the bottom end of the guide sleeve 312 is beveled, and the guide sleeve 312 is fixed to the bottom plate 200 by bevel welding. This fixing method can effectively prevent the weld from breaking due to excessive lateral force.

[0033] The elastic element 330 provides the restoring stiffness for the present invention to prevent damage to the rotating inertia container 320 due to large displacement. The two ends of the elastic element 330 are respectively connected to the top plate 100 and the bottom plate 200. In this embodiment, four sets of elastic elements 330 are provided, evenly distributed circumferentially around the outer periphery of the rotating inertia container 320. The elastic element 330 includes a spring 330a. The top plate 100 and the bottom plate 200 are respectively provided with an upper spring base 331 and a lower spring base 332 that mate with the two ends of the spring 330a. The two ends of the spring 330a are respectively sleeved on the upper spring base 331 and the lower spring base 332. The two ends of the spring 330a are connected to the top plate 100 and the bottom plate 200 by welding. The height of the upper spring base 331 and the lower spring base 332 exceeds 15% of the total length of the spring to prevent the spring 330a from buckling under compression.

[0034] The working principle of this invention is as follows:

[0035] When placed between the controlled equipment and the foundation, this invention enables single-degree-of-freedom vertical movement. External responses are transmitted to the top plate 100, causing vertical displacement and driving the ball screw 324 of the rotating inertial container 320. During this movement, the ball screw 324, in conjunction with the ball nut 323, converts linear motion into rotational motion, causing the rotating impeller 322 to rotate within the cylinder 321. The presence of high-viscosity silicone oil within the cylinder 321 provides significant rotational damping for the impeller 322. The interaction between the ball screw 324 and the ball nut 323 further converts this rotational damping into linear damping, providing damping in the vertical direction. During structural vibration, this invention may experience lateral forces. The presence of the guide rod 311 and guide rod sleeve 312 prevents lateral deflection of the vibration isolator, ensuring that the isolator moves only in the vertical direction. Four high-stiffness springs 330a installed between the top plate 100 and the bottom plate 200 provide stiffness for the vibration isolator. When the vibration isolator displacement is too large, they can provide a reverse force to the vibration isolator, realizing the self-resetting performance of the vibration isolator. This invention simultaneously possesses preload, vertical stiffness, horizontal bending resistance, vertical damping, and inertial force, ensuring that the equipment can achieve an effective vibration reduction effect in the vertical direction.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A capacitive anti-sway vertical vibration isolator, characterized in that, It includes a top plate, a bottom plate, and a vibration isolation assembly disposed between the top plate and the bottom plate, the vibration isolation assembly comprising: Several vertical guide rod assemblies that restrict lateral displacement of the top and bottom plates; A rotating inertial container provides damping in the vertical direction for a vertical vibration isolator. The top and bottom ends of the rotating inertial container are connected to a top plate and a bottom plate, respectively. The rotating inertial container includes a cylinder and a rotating impeller rotatably disposed within the cylinder. The top and / or bottom ends of the rotating impeller are connected to ball nuts. A through hole is provided in the middle of the rotating impeller for a ball screw to pass through. The ball screw and the ball nut cooperate to form a kinematic pair. The top of the ball screw is connected to the top plate, and the bottom plate is connected to the bottom of the ball screw or the bottom of the cylinder. A damping medium is provided within the cylinder to prevent the rotating impeller from rotating. Several elastic elements are connected at both ends to the top plate and the bottom plate respectively. The elastic elements provide the reset stiffness of the vertical vibration isolator to prevent the vertical vibration isolator from being damaged by large displacement.

2. The inertial capacitance type anti-sway vertical vibration isolator according to claim 1, characterized in that, The rotating impeller and the ball nut are connected by a slot.

3. The inertial capacitance type anti-sway vertical vibration isolator according to claim 1, characterized in that, The cylinder body includes a cylinder barrel, a cylinder top plate, and a cylinder bottom plate. The cylinder top plate and the cylinder bottom plate are provided with circular holes in the middle for the top and bottom of the rotating impeller to pass through. The top and bottom of the rotating impeller are respectively connected to the cylinder top plate and the cylinder bottom plate through bearings.

4. The inertial capacitance type anti-sway vertical vibration isolator according to claim 1, characterized in that, The damping medium includes silicone oil.

5. The inertial capacitance type anti-sway vertical vibration isolator according to claim 1, characterized in that, The elastic element includes a spring. The top plate and the bottom plate are respectively provided with an upper spring base and a lower spring base that cooperate with the two ends of the spring. The two ends of the spring are respectively sleeved on the upper spring base and the lower spring base. The height of the upper spring base and the lower spring base exceeds 15% of the total length of the spring.

6. The inertial capacitance type anti-sway vertical vibration isolator according to claim 5, characterized in that, The elastic element comprises four groups, which are evenly distributed circumferentially around the outer periphery of the rotating inertial container.

7. The inertial capacitance type anti-sway vertical vibration isolator according to claim 1, characterized in that, The vertical guide rod assembly includes a guide rod fixed to the top plate and a guide sleeve fixed to the bottom plate. The guide rod is inserted into the guide sleeve, and the outer diameter of the guide rod is adapted to the inner diameter of the guide sleeve.

8. A capacitive anti-sway vertical vibration isolator according to claim 7, characterized in that, The top end of the guide rod is beveled, and the guide rod is fixed to the top plate by bevel welding; the bottom end of the guide sleeve is beveled, and the guide sleeve is fixed to the bottom plate by bevel welding.

9. A capacitive anti-sway vertical vibration isolator according to claim 1, characterized in that, The vertical guide rod assembly comprises two sets, symmetrically distributed on both sides of the rotating inertial container.

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