CN103453063A

CN103453063A - Nested collision damper

Info

Publication number: CN103453063A
Application number: CN2012105089205A
Authority: CN
Inventors: 杜妍辰; 刘喆; 吴小乐; 周燕瑜
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2012-12-03
Filing date: 2012-12-03
Publication date: 2013-12-18
Anticipated expiration: 2032-12-03
Also published as: CN103453063B

Abstract

The invention provides a nested collision damper. The nested collision damper has the advantages that energy dissipation modes are various, and after friction layers are added into the nested collision damper on the basis that the original energy dissipation mode is kept, a friction energy dissipation mode becomes a main energy dissipation mode; impact on a system in a collision procedure can be effectively reduced while the momentum exchange and energy dissipated by collision cannot be reduced; energy of the system can be dissipated by collision which occurs on each layer of the nested particle collision damper, the quantity of nested layers can be freely increased or decreased according to the size and the shape of an actual structure, and accordingly the damper can be widely applied to various places, is convenient to install and simple in structure and can adapt to complicated working environments.

Description

But a kind of nesting type impact damper

Technical field

The invention belongs to vibrations control technique field, but be specifically related to a kind of nesting type impact damper with multiple power consumption mode.

Background technique

The middle of last century has occurred increasing the damper of the permanent dissipates vibration structural energy of energy-dissipating device outside mechanical structure.From then on this Passive Control damper with the outside power consumption becomes the focus of research.Impact damper and granule damper are just the Passive Control damper of typical outside power consumption.

Impact damper has passed through the development of more than ten years, applies very extensive.But traditional collisional damping is based upon on the basis of momentum transfer, in collision process, only have the energy of minority to be dissipated, most of energy is still propagated in main system, and can produce impact and produce a large amount of noises main system.The plastic deformation that granule damper mainly causes with the mutual collision between particle is even ruptured and is forever consumed the main system energy, have good vibration damping, vibration isolation and shock proof overall characteristic, vibration damping Bandwidth, overall characteristic are not subject to the impact of environmental conditions substantially.But its power consumption mode is single, internal motion rule complexity.Afterwards, what people proposed was filled into fine particle in impact damper, used the buffering of particle and avoided impacting and noise, and the impactor in collisional damping also can impact particle in addition increases plastic deformation, thereby increases the plastic deformation energy dissipation of particle.Collisional damping with filler particles has been made significant headway in the development of this type of damper.

Yet, the consumption mechanism of this damper still mainly is confined to impact power consumption and plastic deformation energy dissipation, friction energy-dissipating is mainly the motion between particle, between particle and particle, be mainly again to contact, friction is also insufficient, so friction energy-dissipating is not fully utilized, not good for the vibration damping effect of low frequency, still can impact main system.Need carry out specialized designs according to mechanism's actual conditions for different mechanisms, versatility does not wait by force major defect.

Summary of the invention

For many defects of existing damper, but the present invention proposes a kind of impact damper of nesting type.

But a kind of impact damper with nesting type provided by the invention comprises: impactor, hold the accommodating part of described impactor, and the nested cell that holds described accommodation section;

Wherein, described nested cell has: the nested upper cover of at least one, the nested lower cover equated with described nested upper cover number, and the nested upper cover friction layer that is positioned at described nested upper cover inboard equated with described nested upper cover number and the nested lower cover friction layer that is positioned at described nested lower cover inboard equated with described nested lower cover number, described nested upper cover adopts and is threaded with described nested lower cover

Described accommodation section has, the accommodating part upper cover, and accommodating part lower cover, and the accommodating part upper cover friction layer and the accommodating part lower cover friction layer that is positioned at the lower cover outside, accommodating part that are positioned at the upper cover outside, accommodating part, the described accommodation section upper cover adopts and is threaded with the described accommodation section lower cover,

Wherein, described nested upper cover is all curved surfaces of projection of outer surface with described nested lower cover, and described nested upper cover and the upper bottom surface of described nested lower cover institute internal surface are also protruding curved surface.

Further, impact damper provided by the invention can also have such feature: wherein, and at described threaded connection place filling metallic particles for overlay.

Invention effect and effect

In sum, nesting type particles-impact damper provided by the invention, it is characterized in that the shape by changing impactor changes original into the face contact in a power consumption mode contacted with the increase friction coatings, strengthen stressed area of contact and friction factor and positive pressure, made friction energy-dissipating also be incorporated as main power consumption mode.Originally main impact and these two kinds of modes of plastic deformation of relying on consume energy, and friction energy-dissipating is not fully utilized.The present invention is improved to impact, three kinds of major ways power consumptions of plastic deformation and friction.And after adding friction energy-dissipating by the shape that changes impactor, effectively slow down the impact of single-impact on system, can change friction layer in use for some time, to guarantee the working life of damper.

This nesting type particles-impact damper can also be according to actual situation the size by nested change damper, shape, cushioning ability etc., and can produce the granule damper of different size in batches, only need assemble and get final product in actual application, it be easy for installation, simple in structure, use flexibly, adapt to complicated working environment, can be widely used in various occasions.The accompanying drawing explanation

But Fig. 1 is the nesting type impact damper structural representation in an embodiment the present invention relates to;

Embodiment

Below in conjunction with accompanying drawing and embodiment, the invention will be further described.It should be understood that these embodiments only are not used in and limit the scope of the invention for the present invention is described.

Embodiment

But Fig. 1 is the nesting type impact damper structural representation in an embodiment the present invention relates to.

As shown in Figure 1, but a kind of nesting type impact damper in the present embodiment mainly comprise: original impact steel ball; The upper and lower covers of each nesting level; Friction layer; Filler particles.

First layer impactor [3] can directly be selected the steel ball of 10mm, and upper and lower end cap car is gone out to screw thread, makes upper and lower end cap be threaded [2].Wherein filling metallic particles for overlay or other are easy to produce the powder of plastic deformation, and its particle diameter is the 0.1mm left and right, and fill factor is 40% to get final product.The interior outside of upper bottom surface is processed as to arc, to increase plastic deformation.After installing, in the outside, paste or the full-filling friction layer, can select shaggy friction plate or coating.Use a period of time, the friction layer wearing and tearing, can paste one deck again, can repeatedly use.Second layer container layer is within it pasted or the full-filling friction layer, then one deck container is arranged on wherein as impactor, and powder filler.When reality is used, can and need according to actual situation to increase or reduce the number of plies.After the size and the number of plies of determining damper, can add as required mounting groove or installed at the needed mounting parts of damper external welding on the device of damping.

The end face of impactor and bottom surface are all curved surfaces of projection of inner and outer surface, when impacting, can increase the consumption of energy, and can shorten time of collision because collision produces resiliently deformable like this, improve the efficiency of energy interchange and the energy consumed in collision process.

But the friction layer added in the inside and outside wall of the container of this nesting type particles-impact damper, can make its friction to greatest extent in movement process, and effectively reduced in the collision process impact to system, but can not reduce the energy that momentum transfer and collision consume.Can change friction layer in use for some time, to guarantee the working life of damper.

Embodiment's effect and effect

The present invention discloses a kind of nesting type particles-impact damper.It is characterized in that the shape by changing impactor changes original into the face contact in a power consumption mode contacted with the increase friction coatings, strengthen stressed area of contact, friction factor and positive pressure, also be introduced as main power consumption mode by friction energy-dissipating, increased the power consumption mode.The impact damper of nested structure can effectively disperse the intensity of single-impact, reduces the impact of impactor on system, and the collision of every one deck simultaneously can consume system capacity.And the present invention can freely add according to actual needs or reduce the nested number of plies, and it is easy for installation, simple in structure, use flexibly, make this damper can be widely used in various occasions, be particularly useful for adapting to complicated working environment.

In sum, the present invention has added friction energy-dissipating in traditional impact damper, and the energy dissipation mode that has increased system has slowed down its impact to system.Adopted nested mode to carry out the combination of dampings device, can change according to the actual needs the size of damper, increased energy dissipation, saved space, can produce in batches after determining different model.Be designed to arc at columniform impactor end face, in the impactor impact process, impactor can produce plastic deformation and reduce time of collision, slows down the impact to system.Damper is easy for installation, adapts to complicated working environment, and the damping Bandwidth is little to the impact of system, good reliability, and can being repeatedly used after wearing and tearing, the advantage such as Economy is strong.

Claims

1. but the impact damper of a nesting type, is characterized in that, comprising:

Impactor, hold the accommodating part of described impactor, and the nested cell that holds described accommodation section;

2. according to claim 1, it is characterized in that:

Wherein, at described threaded connection place filling metallic particles for overlay.