CN211231406U

CN211231406U - Bidirectional horizontal eddy current tuned mass damper based on nonlinear energy trap

Info

Publication number: CN211231406U
Application number: CN201922422011.XU
Authority: CN
Inventors: 施竹珺; 盛刘平; 夏明明
Original assignee: Jiangsu Lubo Damping Technology Co ltd
Current assignee: Jiangsu Lubo Damping Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-08-11
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a harmonious mass damper of two-way horizontal eddy current based on nonlinear energy trap, including the quality piece, the quality piece all is equipped with damping device, every all around the damping device bilateral symmetry is equipped with a set of rigidity spring that becomes, become rigidity spring one end and quality piece fixed connection, it is equipped with peripheral steel sheet to become rigidity spring and keep away from quality piece one end, the peripheral steel sheet outside is encircleed and is equipped with a plurality of stiffening ribs, the quality piece bottom is connected with first glide plane, first glide plane bottom is equipped with the base steel sheet. The spring of the utility model belongs to a non-linear spring, the rigidity can change along with the change of deformation, and further the fixed frequency of the damper can also change, the frequency value is not reflected as a specific value any more, and the characteristic of a broadband is provided; and the damping device has good control effect, simple structure, easy maintenance and installation, good durability and the like.

Description

Bidirectional horizontal eddy current tuned mass damper based on nonlinear energy trap

Technical Field

The utility model relates to a civil engineering structure vibration control field, in particular to harmonious mass damper of two-way horizontal eddy current based on nonlinear energy trap.

Background

With the continuous improvement of the environmental quality requirements of the construction engineering in China, the control of people on vibration is more strict. The vibration isolation technology is an effective means for controlling vibration, and is gradually known, and many small and medium-sized machines and equipment achieve good results due to the adoption of the vibration isolation technology. Some large equipment also tend to transition from a rigid foundation to a resilient foundation, i.e., using vibration isolation techniques. For small and medium-sized machine equipment, when the effect is not ideal after the vibration isolator is installed, the equipment is lighter and can meet the requirements only by adjusting the equipment. However, for large-scale equipment, once the equipment is installed, the adjustment is required, which is difficult in structure and is often not allowable in terms of the progress of engineering. Moreover, large-scale equipment can obviously affect peripheral structures and equipment due to vibration, for example, the vibration of the large-scale equipment in a factory building can affect the processing precision of peripheral lathes, milling machines and other processing equipment, and the production quality and the production efficiency of a factory are affected. The vibration of part of large-scale equipment is more violent in horizontal direction response, and the vibration of its horizontal direction of control can reduce its vibration that conducts to ground.

Therefore, it is necessary to invent a bidirectional horizontal eddy current tuned mass damper based on nonlinear energy trap to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a harmonious mass damper of two-way horizontal eddy current based on nonlinear energy trap to solve the current main equipment that proposes in the above-mentioned background art and can produce obvious influence to peripheral structure, equipment because of the vibration, influence the production quality of mill and production efficiency's problem.

In order to achieve the above object, the utility model provides a following technical scheme: a bidirectional horizontal eddy current tuned mass damper based on a nonlinear energy trap comprises mass blocks, wherein damping devices are arranged on the periphery of each mass block, a group of variable stiffness springs are symmetrically arranged on two sides of each damping device, one ends of the variable stiffness springs are fixedly connected with the mass blocks, one ends, far away from the mass blocks, of the variable stiffness springs are provided with peripheral steel plates, a plurality of stiffening ribs are arranged on the outer sides of the peripheral steel plates in a surrounding mode, the bottom of each mass block is connected with a first sliding surface, a base steel plate is arranged at the bottom of each first sliding surface, the outer sides of the base steel plates are fixedly connected with the peripheral steel plates, the stiffening ribs promote the bending stiffness of the peripheral steel plates, the frequency bands of the tuned mass damper in two horizontal directions are kept consistent in principle, and the two directions can have different frequency band;

the damping device comprises conductor blocks and permanent magnets, the conductor blocks are arranged on the periphery of the mass block, the permanent magnets are correspondingly arranged on one sides of the conductor blocks, and one sides of the permanent magnets are fixedly connected with the peripheral steel plate.

Preferably, the variable stiffness spring is connected with the mass block and the peripheral steel plate through fasteners, the nonlinearity of the variable stiffness spring is embodied as cubic stiffness, and the restoring force of the spring is in direct proportion to the third power of the deformation of the spring.

Preferably, the first sliding surface is composed of a polytetrafluoroethylene plate and a stainless steel plate, and the sliding surface is coated with silicone grease, so that a very low friction coefficient can be maintained.

Preferably, the direction of the NS pole of the permanent magnet is parallel to the attached peripheral steel plate, the permanent magnet is fixed on the attached peripheral steel plate through a bolt, and the conductor block is fixed on the mass block through a bolt.

The utility model has the advantages that:

when equipment vibrates, vibration is transmitted to the mass block through the variable-stiffness spring, the fixed frequency of the whole damping device changes within a fixed range, as long as the excitation frequency for inducing the equipment to vibrate is within the fixed frequency range, the tuned mass damper can effectively reduce the vibration of the equipment, the energy generated by vibration is obviously consumed, meanwhile, the vibration direction of the mass block is always opposite to the vibration direction of the main structure, the mass block can vertically cut the magnetic induction line through vertical vibration, so that eddy current is formed in the conductor plate, vertical damping force is further provided for the mass block, the energy of vibration is converted into heat energy, the purpose of controlling vertical vibration is achieved, the damping device adopting the permanent magnet and the conductor plate provides the damping force, and external energy supply is not needed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a side view of the present invention;

in the figure: the device comprises a mass block 1, a conductor block 2, a permanent magnet 3, a stiffening rib 4, a peripheral steel plate 5, a variable stiffness spring 6, a first sliding surface 7 and a base steel plate 8.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a harmonious mass damper of two-way horizontal eddy current based on nonlinear energy trap as shown in fig. 1-2, including quality piece 1, quality piece 1 all is equipped with damping device all around, every damping device bilateral symmetry is equipped with a set of variable stiffness spring 6, variable stiffness spring 6 one end and quality piece 1 fixed connection, variable stiffness spring 6 keeps away from quality piece 1 one end and is equipped with peripheral steel sheet 5, the outer side of peripheral steel sheet 5 is encircleed and is equipped with a plurality of stiffening ribs 4, quality piece 1 bottom is connected with first glide plane 7, first glide plane 7 bottom is equipped with base steel sheet 8, the outer side of base steel sheet 8 and peripheral steel sheet 5 fixed connection;

the damping device comprises conductor blocks 2 and permanent magnets 3, the conductor blocks 2 are arranged on the periphery of the mass block 1, the permanent magnets 3 are correspondingly arranged on one sides of the conductor blocks 2, and one sides of the permanent magnets 3 are fixedly connected with peripheral steel plates 5.

Further, in the above technical solution, the variable stiffness spring 6 is connected to the mass block 1 and the peripheral steel plate 5 through fasteners;

furthermore, in the above technical solution, the first sliding surface 7 is composed of a teflon plate and a stainless steel plate, and the sliding surface is coated with silicone grease, so that a very low friction coefficient can be maintained;

further, in the above technical solution, the direction of the NS pole of the permanent magnet 3 is parallel to the attached peripheral steel plate 5, the permanent magnet 3 is fixed on the attached peripheral steel plate 5 by bolts, and the conductor block 2 is fixed on the mass block 1 by bolts.

This practical theory of operation:

referring to fig. 1-2 of the specification, when the equipment connected to the damper of the present invention vibrates, the vibration is transmitted to the mass block 1 through the variable stiffness spring 6, the fixed frequency of the whole damping device is changed within a fixed range, as long as the excitation frequency causing the equipment to vibrate is within the fixed frequency range, the tuned mass damper is effective in reducing vibration of the device, dissipating a portion of the energy generated by the vibration, meanwhile, the vibration direction of the mass block 1 is always opposite to the vibration direction of the main structure, the vibration of the mass block 1 in the vertical direction can lead the conductor block 2 to cut magnetic induction lines in the vertical direction, so that an eddy current is formed in the conductor block 2, and then provide vertical damping force for quality piece 1, turn into the energy of vibration heat energy, play the purpose of control vertical vibration for the obvious increase of shock attenuation effect has improved the production efficiency of equipment.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A bidirectional horizontal eddy current tuned mass damper based on a nonlinear energy trap is characterized in that: the damping device comprises a mass block (1), damping devices are arranged on the periphery of the mass block (1), a group of variable stiffness springs (6) are symmetrically arranged on two sides of each damping device, one ends of the variable stiffness springs (6) are fixedly connected with the mass block (1), a peripheral steel plate (5) is arranged at one end, away from the mass block (1), of each variable stiffness spring (6), a plurality of stiffening ribs (4) are arranged on the outer side of the peripheral steel plate (5) in a surrounding mode, a first sliding surface (7) is connected to the bottom of the mass block (1), a base steel plate (8) is arranged at the bottom of the first sliding surface (7), and the outer side of the base steel plate (8) is fixedly connected with the;

the damping device comprises a conductor block (2) and a permanent magnet (3), the conductor block (2) is arranged on the periphery of the mass block (1), the permanent magnet (3) is correspondingly arranged on one side of the conductor block (2), and one side of the permanent magnet (3) is fixedly connected with a peripheral steel plate (5).

2. The nonlinear energy trap-based bi-directional horizontal eddy current tuned mass damper according to claim 1, wherein: the variable stiffness spring (6) is connected with the mass block (1) and the peripheral steel plate (5) through fasteners.

3. The nonlinear energy trap-based bi-directional horizontal eddy current tuned mass damper according to claim 1, wherein: the first sliding surface (7) is composed of a polytetrafluoroethylene plate and a stainless steel plate, and the sliding surface is coated with silicone grease, so that a very low friction coefficient can be maintained.

4. The nonlinear energy trap-based bi-directional horizontal eddy current tuned mass damper according to claim 1, wherein: the NS pole direction of the permanent magnet (3) is parallel to the attached peripheral steel plate (5), the permanent magnet (3) is fixed on the attached peripheral steel plate (5) through a bolt, and the conductor block (2) is fixed on the mass block (1) through a bolt.