CN110285182A - The vibration isolator of high quiet low dynamic stiffness characteristic and rail system with it - Google Patents
The vibration isolator of high quiet low dynamic stiffness characteristic and rail system with it Download PDFInfo
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- CN110285182A CN110285182A CN201910628663.0A CN201910628663A CN110285182A CN 110285182 A CN110285182 A CN 110285182A CN 201910628663 A CN201910628663 A CN 201910628663A CN 110285182 A CN110285182 A CN 110285182A
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000013016 damping Methods 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000001727 in vivo Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 12
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 230000003068 static effect Effects 0.000 description 10
- 238000007667 floating Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
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- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005312 nonlinear dynamic Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention provides a kind of vibration isolator of high quiet low dynamic stiffness characteristic and with its rail system, vibration isolator includes: positive rigidity component, and positive rigidity component includes pedestal and intracorporal first elastic component of chamber that pedestal is arranged in；Support portion, support portion are abutted with the upper end of the first elastic component；Float portion, float portion and support portion are cooperatively connected；The elastic portion of negative stiffness component is connect with support portion or float portion, and supporting part is connect with pedestal；First impeller of elastic portion is connect with the second elastic component；In the case where bearing load and compressing the first elastic component, the direction for the active force that the second elastic component is applied by the second impeller to supporting part tilts or is vertically arranged with respect to the direction of the elastic force of the first elastic component float portion.The technical solution provided through the invention can reduce existing rail system intrinsic frequency, improve the isolation frequency range and low frequency vibration damping effect of existing vibration isolator and rail system, while dynamic displacement of the train by rail system when can be effectively controlled.
Description
Technical field
The present invention relates to track vibration damping denoising technical field, in particular to a kind of high quiet low dynamic stiffness characteristic every
Shake device and the rail system with it.
Background technique
Low frequency vibration isolation is the big research hotspot in rail traffic vibration isolation field one and difficult point.Structural vibration control according to whether
Extra power input can be divided into passive control, active control, semi- active control and mixing control, using active control vibration isolation and half
Two kinds of technologies of active control vibration isolation are well isolated from low-frequency vibration, but its structure is complicated, and occupied space is larger, manufacturing cost
The problems such as height is required to extraneous offer energy, and there are unstable and electromagnetic pollutions.In contrast, traditional passive vibration isolation knot
Structure is simple, be easily achieved, reliable operation, will not additionally consume extraneous energy, but work as its structure once it is determined that, intrinsic frequency
Rate is just determined, only when the specific factor Shi Caineng that driving frequency is greater than vibrating isolation system intrinsic frequency plays vibration isolating effect.One
As in the case of passive vibration isolation can preferably be isolated medium, high frequency vibration, but be isolated low-frequency vibration ability it is poor.
According to vibrating isolation system self-characteristic and description vibration mathematical model difference, vibrating isolation system can be divided into again linearly every
Vibrating system and Nonlinear Vibration Isolation System.Wherein, linear vibrating isolation system refers to that quality remains unchanged, but its elastic force and damping force with
The linear system of kinematic parameter, mathematical model can be indicated with linear constant coefficient ODE.And it is not belonging to line
The system of property vibrating isolation system is Nonlinear Vibration Isolation System.By theory of vibration isolation it is found that the transport of linear vibrating isolation system is rigid with it
Degree k and damping c have close relationship.When selection increases system damping, damping ratio increases, then its resonant frequency is corresponding
Transport maximum value reduces, but it will increase in the transport of high band；When selection reduces system stiffness, intrinsic frequency
Reduce, then vibration isolation initial frequency reduces, and isolation frequency range increases, but its static bearing capacity declines, and static deformation amount increases
Greatly.Therefore for traditional linear vibrating isolation system, lower vibration isolation initial frequency can not be obtained simultaneously and higher static state is held
Loading capability, the two are mutually contradictory contradictory.This is also above-mentioned rail traffic vibration reducing measure in the main of low frequency vibration damping effect difference
Reason.
Therefore, the isolation frequency narrow range of existing vibration isolator, low-frequency vibration and simultaneously can be effectively isolated by designing one kind
The vibration isolator of track dynamic displacement is controlled, it is necessary for the low frequency vibration isolation of rail traffic or other field.
Summary of the invention
The main purpose of the present invention is to provide a kind of vibration isolator of high quiet low dynamic stiffness characteristic and with its track system
System reduces the intrinsic frequency of existing vibration isolator and its rail system under the premise of strict control or reduction track dynamic displacement,
Improve low frequency vibration damping effect and isolation frequency range.
To achieve the goals above, according to an aspect of the present invention, the present invention provides a kind of high quiet low dynamic stiffness is special
Property vibration isolator, comprising: positive rigidity component, positive rigidity component include pedestal and intracorporal first elasticity of chamber that pedestal is arranged in
Part；Support portion, support portion are abutted with the upper end of the first elastic component；Float portion, float portion and support portion are cooperatively connected；Negative stiffness group
Part, negative stiffness component include elastic portion and supporting part, and elastic portion is connect with support portion or float portion, and supporting part is connect with pedestal；
Wherein, elastic portion includes the second elastic component, the first impeller and the second impeller, and the first impeller is connect with the second elastic component,
The both ends of second impeller cooperate with the first impeller and supporting part respectively, and the second impeller can be with respect to the first impeller and the
Two impellers are mobile；In the case where bearing load and compressing the first elastic component, the second elastic component pushes float portion by second
The direction for the active force that part applies to supporting part tilts or is vertically arranged with respect to the direction of the elastic force of the first elastic component.
Further, the second elastic component is in compressive state, has the first arc groove on the first impeller, has on supporting part
Have the second arc groove, the both ends of the second impeller be respectively provided with the first cambered surface of the first arc groove cooperation and with the second arc groove
Second cambered surface of cooperation.
Further, the second elastic component is spring, and the first impeller includes cylinder and the positioning plate that connect with cylinder, is positioned
Plate is abutted with the second elastic component, and the second impeller and positioning plate cooperate.
Further, elastic portion further include: guide frame, guide frame is horizontally disposed, and the setting of the second elastic component is being oriented to
In structure.
Further, elastic portion further include: locating part, locating part are arranged in the end of guide frame, locating part for pair
Second elastic component is limited.
Further, supporting part includes connecting rod and load-bearing part, and the lower end of connecting rod and the bottom of pedestal connect, the upper end of connecting rod
It is connect with load-bearing part, the second impeller and load-bearing part are cooperatively connected.
Further, connecting rod wears at least part by support portion, has the evacuation of evacuation load-bearing part on support portion
Hole, load-bearing part are threadedly coupled or weld with connecting rod.
Further, elastic portion is multiple, and multiple elastic portions are distributed in the circumferential direction of supporting part.
Further, float portion includes cylinder and the supporting element that is arranged on the inner wall of cylinder, supporting element and support portion
Top connection, cylinder is interior to have the second cavity in the top of supporting element, and elastic portion is arranged in the second cavity.
Further, elastic portion is connect with float portion, and float portion further includes that first be arranged on the inner wall of cylinder is fixed
Part, for the second cavity between supporting element and the first fixing piece, elastic portion further includes guide frame, the top of guide frame and the
The connection of one fixing piece, the second elastic component are arranged in guide frame.
Further, float portion further include: the lower part of the second fixing piece, the second fixing piece is connect with support portion, guiding knot
The lower part of structure is connect with the top of the second fixing piece.
Further, support portion and pedestal interval are arranged, and the lower end surface of support portion and the upper surface of pedestal are correspondingly arranged, every
The device that shakes further includes sealing element, and sealing element is set on support portion and pedestal, to block the gap between support portion and pedestal.
Further, float portion includes the supporting element of cylinder and the annular being arranged on the inner wall of cylinder, is had on supporting element
There is escape groove；Support portion can Relative Floating portion rotation and along cylinder axial movement, support portion include frame body and setting exist
Cover board on frame body, by the relative movement of support portion and float portion, cover board can wear by escape groove and be moved to
The position that the lower end surface of supporting element abuts.
Further, vibration isolator further include: damping fluid is arranged in the cavity of pedestal；Damping piece, the upper end of damping piece with
The lower end of support portion connection, damping piece is immersed in damping fluid.
According to another aspect of the present invention, a kind of rail system is provided, the vibration isolator including high quiet low dynamic stiffness characteristic,
Vibration isolator is the above-mentioned vibration isolator provided.
It applies the technical scheme of the present invention, positive rigidity component, support portion, float portion and negative stiffness group is set in vibration isolator
Part, for bearing load, the elastic portion of negative stiffness component is connect float portion with support portion or float portion, and supporting part and pedestal connect
It connects, in the case where bearing load and compressing the first elastic component, the first elastic component is shunk float portion, the second elastic component of elastic portion
Bullet of the direction of the active force applied to supporting part by the transmitting of the first impeller and the second impeller with respect to the first elastic component
The direction of power tilts.In this way, the elastic force that positive rigidity component and the cooperation of negative stiffness component generate, the displacement with float portion is in non-thread
Sexual intercourse, the in this way vibration isolator can obtain lower vibration isolation initial frequency and higher static bearing capacity simultaneously, that is, have compared with
High static rigidity and lower dynamic rate characteristic (referred to as high quiet low dynamic), can completely cut off low frequency vibration, improve vibration isolation
The isolation frequency range of device.The vibration isolator is applied in rail system, the isolation frequency range of rail system can be improved, is reduced
Low frequency vibration transmitting, reduces the influence to ambient enviroment.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the vibration isolator of the embodiment of the present invention offer；
Fig. 2 shows one arrangement schematic diagrams of elastic portion in the vibration isolator in Fig. 1；
Fig. 3 shows elastic portion another arrangement schematic diagram in the vibration isolator in Fig. 1；
Fig. 4 shows elastic portion another arrangement schematic diagram in the vibration isolator in Fig. 1；
Fig. 5 shows the top view of the vibration isolator in Fig. 1.
Wherein, the above drawings include the following reference numerals:
10, positive rigidity component；11, pedestal；12, the first elastic component；20, support portion；21, frame body；22, cover board；30, it floats
Portion；31, cylinder；32, supporting element；321, escape groove；33, the first fixing piece；34, the second fixing piece；40, elastic portion；41, second
Elastic component；42, the first impeller；421, cylinder；422, positioning plate；43, guide frame；44, locating part；45, the second impeller；
50, supporting part；52, connecting rod；53, load-bearing part；60, sealing element；70, damping piece.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figures 1 to 5, the embodiment provides a kind of vibration isolators of high quiet low dynamic stiffness characteristic, comprising:
Positive rigidity component 10, positive rigidity component 10 include pedestal 11 and intracorporal first elastic component 12 of chamber that pedestal 11 is arranged in；Support
Portion 20, support portion 20 are abutted with the upper end of the first elastic component 12；Float portion 30, float portion 30 and support portion 20 are cooperatively connected；It is negative
Rigidity component, negative stiffness component include elastic portion 40 and supporting part 50, and elastic portion 40 connect with support portion 20 or float portion 30, holds
Load portion 50 is connect with pedestal 11；Wherein, elastic portion 40 includes the second elastic component 41, the first impeller 42 and the second impeller 45,
First impeller 42 is connect with the second elastic component 41, the both ends of the second impeller 45 respectively with the first impeller 42 and supporting part 50
Cooperation, the second impeller 45 can be mobile relative to the first impeller 42 and the second impeller 45；Float portion 30 is bearing load simultaneously
In the case where compressing the first elastic component 12, the second elastic component 41 passes through the active force that the second impeller 45 applies to supporting part 50
Direction tilts or is vertically arranged with respect to the direction of the elastic force of the first elastic component 12.Specifically, the phase of elastic portion 40 and supporting part 50
The direction of interreaction force along the normal orientation of the curved surface of supporting part 50 variation and change.
Using the technical solution of the present embodiment, positive rigidity component 10, support portion 20,30 and of float portion are set in vibration isolator
Negative stiffness component, for bearing load, the elastic portion 40 of negative stiffness component is connect float portion 30 with support portion 20 or float portion 30,
Supporting part 50 is connect with pedestal 11, and float portion 30 is in the case where bearing load and compressing the first elastic component 12, the first elastic component
12 shrink, and the second elastic component 41 of elastic portion 40 is applied by the transmitting of the first impeller 42 and the second impeller 45 to supporting part 50
The direction of the active force added is tilted with respect to the direction of the elastic force of the first elastic component 12.In this way, positive rigidity component 10 and negative stiffness group
The elastic force that part cooperation generates, the displacement with float portion 30 is in non-linear relation, and the vibration isolator in this way can obtain lower simultaneously
(the letter of vibration isolation initial frequency and higher static bearing capacity, i.e., static rigidity with higher and lower dynamic rate characteristic
Claim high quiet low dynamic), low frequency vibration can be completely cut off, improve the isolation frequency range of vibration isolator.The vibration isolator is applied to rail
In road system, the isolation frequency range of rail system can be improved, reduce low frequency vibration transmitting, reduce the shadow to ambient enviroment
It rings.
In the present embodiment, the second elastic component 41 is in compressive state, has the first arc groove on the first impeller 42, holds
In load portion 50 have the second arc groove, the both ends of the second impeller 45 be respectively provided with the first arc groove cooperation the first cambered surface and
With the second cambered surface of the second arc groove cooperation.By the cooperation of arc groove and arcwall face, nonlinear force can be better achieved
Demand, to realize high quiet low dynamic effect.
Specifically, in the present embodiment, the second elastic component 41 is spring, and the first impeller 42 includes cylinder 421 and and column
The positioning plate 422 that body 421 connects, positioning plate 422 are abutted with the second elastic component 41, and the second impeller 45 cooperates with positioning plate 422.
Wherein, cylinder 421 is threaded through in the second elastic component 41.By above-mentioned setting, the second elastic component 41 and the first impeller may make
42 cooperations are reliable and are convenient for the transmitting of power.
In the present embodiment, elastic portion 40 further include: guide frame 43, guide frame 43 is horizontally disposed, the second elastic component
41 are arranged in guide frame 43.By above-mentioned setting, the displacement of the second elastic component 41 can be oriented to.
In the present embodiment, elastic portion 40 further include: the end of guide frame 43 is arranged in locating part 44, locating part 44,
Locating part 44 is for limiting the second elastic component 41.The second elastic component 41 can be limited by the way that locating part 44 is arranged,
It can avoid the second elastic component 41 in this way and deviate from guide frame 43.Specifically, locating part 44 and the limit of the first impeller 42 cooperate.
In the present embodiment, supporting part 50 includes connecting rod 52 and load-bearing part 53, the lower end and the bottom of pedestal 11 of connecting rod 52
Connection, the upper end of connecting rod 52 are connect with load-bearing part 53, and the second impeller 45 is cooperatively connected with load-bearing part 53.By above-mentioned setting,
Supporting part 50 may make to connect with positive rigidity component 10, the active force for being easily carried the negative stiffness component of the receiving of portion 50 passes to just
Rigidity component 10 so that positive rigidity component 10 and negative stiffness component cooperate jointly carries out vibration damping to load, while reducing vibration pair
The transmitting of ambient enviroment reduces the influence to ambient enviroment.Specifically, the phase interaction that the second impeller 45 is generated with load-bearing part 53
Normal orientation of the power thrusts along load-bearing part 53.
It should be noted that the curved surface on load-bearing part 53 and load-bearing part 53 on supporting part 50 is all can be according to practical need
It asks and is designed to of different shapes, the shape and sliding type of the impeller in elastic portion 40 can also carry out a variety of different change
Become.No matter how its shape and mode change, and principle is all using Method And Principle of the invention, all in protection scope.
Specifically, connecting rod 52 wears at least part by support portion 20, has evacuation load-bearing part 53 on support portion 20
Avoid holes, load-bearing part 53 is threadedly coupled or welds with connecting rod 52.By above-mentioned setting, so that vibration isolator structure is compact, volume
It is small, and convenient for assembly.
In the present embodiment, elastic portion 40 is multiple, and multiple elastic portions 40 are distributed in the circumferential direction of supporting part 50.It in this way can be with
Negative stiffness component is improved to the entire effect of vibration isolator, the effect of nonlinear characteristic is improved, improves the isolation frequency model of vibration isolator
It encloses.Furthermore, it is possible to make the stress of supporting part 50 relatively uniform.
In the present embodiment, float portion 30 includes cylinder 31 and the supporting element 32 being arranged on the inner wall of cylinder 31, support
Part 32 is connect with the top of support portion 20, has the second cavity in the top of supporting element 32 in cylinder 31, the setting of elastic portion 40 exists
In second cavity.Elastic portion 40 can be connect with the structure in float portion 30, can also be connect with the structure in support portion 20.
Specifically, in the present embodiment, elastic portion 40 is connect with float portion 30, and float portion 30 further includes being arranged in cylinder 31
Inner wall on the first fixing piece 33, the second cavity is located between supporting element 32 and the first fixing piece 33, and elastic portion 40 further includes
Guide frame 43, the top of guide frame 43 are connect with the first fixing piece 33, and the second elastic component 41 is arranged in guide frame 43.
By the connection of guide frame 43 and the first fixing piece 33, it can be achieved that the position of the second elastic component 41 sets and to the second elasticity
The guiding of part 41.Guide frame 43 can be set to groove-like structure or tubular structure.
In the present embodiment, float portion 30 further include: the second fixing piece 34, the lower part of the second fixing piece 34 and support portion 20
Connection, the lower part of guide frame 43 is connect with the top of the second fixing piece 34.By above-mentioned setting, it can be achieved that each portion in vibration isolator
The stabilization of part, firm connection, to improve the reliability of vibration isolator.
In the present embodiment, support portion 20 and the interval of pedestal 11 are arranged, the lower end surface of support portion 20 and the upper end of pedestal 11
Face is correspondingly arranged, and vibration isolator further includes sealing element 60, and sealing element 60 is set on support portion 20 and pedestal 11, to block support
Gap between portion 20 and pedestal 11.Support portion 20 and the interval of pedestal 11 are arranged, it can portion 20 easy to support and float portion
30 are subjected to displacement when bearing load, and the lower end surface of support portion 20 and the upper surface of pedestal 11 are correspondingly arranged, when load is excessive
When, the lower end surface of support portion 20 can directly contact with the upper surface of pedestal 11 and play position-limiting action, in this way can be to avoid floating
The displacement in dynamic portion 30 is excessive, and since the first elastic component 12 deforms excessive, generates plastic deformation and damage.In order to guarantee effectively
Property, the sealing element 60 of the present embodiment selects rubber seal, and is separately fixed on pedestal 11 and support portion 20 by hose clamp.
In the present embodiment, float portion 30 includes the supporting element of cylinder 31 and the annular being arranged on the inner wall of cylinder 31
32, there is on supporting element 32 escape groove 321；Support portion 20 being capable of the rotation of Relative Floating portion 30 and the axial direction shifting along cylinder 31
Dynamic, support portion 20 includes frame body 21 and the cover board 22 being arranged on frame body 21, is moved by support portion 20 and the opposite of float portion 30
Dynamic, cover board 22 can wear through escape groove 321 and be moved to the position abutted with the lower end surface of supporting element 32.Using above-mentioned
Setting, when assembling vibration isolator, rotation support portion 20 keeps the protrusion part on cover board 22 corresponding with escape groove 321, then to cylinder
It is moved inside body 31, support portion 20 can be penetrated into the lower section of supporting element 32, then rotation support portion 20 again, so that cover board
Protrusion part on 22 misplaces with escape groove 321, and such cover board 22 is abutted with the lower end surface of supporting element 32, to realize float portion
30 are supported float portion 30 with the assembly of support portion 20, i.e. support portion 20.In construction, cylinder 31 can be prefabricated in concrete
Inside track plates.
In the present embodiment, vibration isolator further include: damping fluid is arranged in the cavity of pedestal 11；Damping piece 70, damping piece
70 upper end is connect with support portion 20, and the lower end of damping piece 70 is immersed in damping fluid.By above-mentioned setting, support portion 20 is being born
When load, the vibration of generation can be transmitted in damping fluid by damping piece 70, can be to vibration by the damping of damping fluid
Play the role of slowing down, to play the effect of vibration and noise reducing.Specifically, damping piece 70 includes rod-like element and is arranged under rod-like element
The discoid pieces of side, the upper end of rod-like element is connect with support portion 20.It, can will be rod-shaped in order to improve bonding strength and transmission effect
Part is set as multiple, and multiple rod-like elements are arranged around supporting part 50.Damping fluid is poured in height certain in pedestal 11, provides and is
The damped coefficient that system needs.
Another embodiment of the present invention provides a kind of rail system, the vibration isolator including high quiet low dynamic stiffness characteristic, every
Vibration device is vibration isolator provided by the above embodiment.
In existing damping technology, floating plate rail structure is considered as the best track vibration-reducing form of effectiveness in vibration suppression.But
Existing floating plate vibration isolator belongs to linear vibrating isolation system, due to its structural limitations and material limits can not possess simultaneously compared with
Low vibration isolation initial frequency and higher static bearing capacity, and cannot be according to the train difference speed of service, track irregularity
The factors such as property adjust its anti-vibration performance in real time, and isolation frequency range and vibration isolating effect are unsatisfactory.
Using the technical solution of the present embodiment, positive rigidity component 10, support portion 20,30 and of float portion are set in vibration isolator
Negative stiffness component, for bearing load, the elastic portion 40 of negative stiffness component is connect float portion 30 with support portion 20 or float portion 30,
Supporting part 50 is connect with pedestal 11, and float portion 30 is in the case where bearing load and compressing the first elastic component 12, the first elastic component
12 shrink, and the second elastic component 41 of elastic portion 40 is applied by the transmitting of the first impeller 42 and the second impeller 45 to supporting part 50
The direction of the active force added is tilted with respect to the direction of the elastic force of the first elastic component 12.In this way, positive rigidity component 10 and negative stiffness group
The elastic force that part cooperation generates, the displacement with float portion 30 is in non-linear relation, and the vibration isolator in this way can obtain lower simultaneously
(the letter of vibration isolation initial frequency and higher static bearing capacity, i.e., static rigidity with higher and lower dynamic rate characteristic
Claim high quiet low dynamic), low frequency vibration can be completely cut off, improve the isolation frequency range of vibration isolator.The vibration isolator is applied to rail
In road system, the isolation frequency range of rail system can be improved, reduce low frequency vibration transmitting, reduce the shadow to ambient enviroment
It rings.Existing vibration isolator and its rail are reduced under the premise of strict control or reduction track dynamic displacement using the technical solution
The intrinsic frequency of road system improves low frequency vibration damping effect and isolation frequency range.
The cylinder 31 of vibration isolator is prefabricated in concrete railway board, and when train passes through, cylinder 31 is transported downwards with track plates
Dynamic, then support portion 20, guide frame 43, the second elastic component 41, the first impeller 42 move downward simultaneously, and pedestal 11 is placed on road
On base, then connecting rod 52, load-bearing part 53 are fixed, and the first elastic component 12 of positive rigidity is under pressure compression, provide rigidity.At this time
Because the second elastic component 41 of negative stiffness is original in compressive state, with the decline of the first impeller 42 simultaneously, the second elasticity
Part 41 starts to loosen, and provides thrust to supporting part 50 by the second impeller 45.
After train warp, the first elastic component 12 starts to loosen offer thrust, then support portion 20, guide frame 43, second
Elastic component 41, the first impeller 42 move upwards simultaneously with cylinder 31, and the active force of the first impeller 42 passes through the second impeller
45 are transmitted to load-bearing part 53, and the second elastic component 41 starts to compress, and provide rigidity.Whole system is because load-bearing part 53 and first pushes
The cooperation of part 42 and nonlinear power is provided.When train passes through, negative stiffness component is moved downward, and load-bearing part 53 and first pushes
The relative position of part 42 changes, and the direction for the power that negative stiffness component provides can change because of contact surface change in shape.Benefit
With the nonlinear dynamic characteristic of the vibration isolator, the high-performance track vibration insulating system with high quiet low dynamic stiffness feature is constituted.
It can be seen from the above description that technical solution of the present invention realizes following technical effect:
1) low frequency vibration isolation for realizing floating plate, reduces its low frequency transport, thus when optimizing the operation of the track trains such as subway
Influence to ambient enviroment, people, building and precision instrument；
2) dynamic displacement of the floating plate when train passes through in rail system is reduced, the deformation of rail system is controlled, subtracts
The diseases such as rail corrugation caused by track structure large deformation are lacked；
3) overall structure has Gao Jing, low dynamic stiffness feature, and good integrity is easy to in-site installation.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (15)
1. a kind of vibration isolator of high quiet low dynamic stiffness characteristic characterized by comprising
Positive rigidity component (10), the positive rigidity component (10) include pedestal (11) and are arranged in the cavity of the pedestal (11)
The first elastic component (12)；
Support portion (20), the support portion (20) abut with the upper end of first elastic component (12)；
Float portion (30), the float portion (30) and the support portion (20) are cooperatively connected；
Negative stiffness component, the negative stiffness component include elastic portion (40) and supporting part (50), the elastic portion (40) with it is described
Support portion (20) or the float portion (30) connection, the supporting part (50) connect with the pedestal (11)；
Wherein, the elastic portion (40) includes the second elastic component (41), the first impeller (42) and the second impeller (45), described
First impeller (42) is connect with second elastic component (41), and the both ends of second impeller (45) are respectively with described first
Impeller (42) and the supporting part (50) cooperation, second impeller (45) can relatively described first impeller (42) and
Second impeller (45) is mobile；
The float portion (30) is in the case where bearing load and compressing the first elastic component (12), second elastic component
(41) relatively described first elasticity in the direction of the active force applied by the second impeller (45) Xiang Suoshu supporting part (50)
The direction of the elastic force of part (12) tilts or is vertically arranged.
2. vibration isolator according to claim 1, which is characterized in that second elastic component (41) is in compressive state, institute
Stating has the first arc groove on the first impeller (42), have the second arc groove on the supporting part (50), and described second pushes
The both ends of part (45) are respectively provided with the with the first cambered surface of first arc groove cooperation and with second arc groove cooperation
Two cambered surfaces.
3. vibration isolator according to claim 1, which is characterized in that second elastic component (41) be spring, described first
Impeller (42) includes cylinder (421) and the positioning plate (422) connecting with the cylinder (421), the positioning plate (422) and institute
The second elastic component (41) abutting is stated, second impeller (45) and the positioning plate (422) cooperate.
4. vibration isolator according to claim 1, which is characterized in that the elastic portion (40) further include:
Guide frame (43), the guide frame (43) is horizontally disposed, and the second elastic component (41) setting is tied in the guiding
In structure (43).
5. vibration isolator according to claim 4, which is characterized in that the elastic portion (40) further include:
Locating part (44), the locating part (44) are arranged in the end of the guide frame (43), and the locating part (44) is used for
Second elastic component (41) is limited.
6. vibration isolator according to claim 1, which is characterized in that the supporting part (50) includes connecting rod (52) and load-bearing part
(53), the lower end of the connecting rod (52) is connect with the bottom of the pedestal (11), the upper end of the connecting rod (52) and the carrying
Part (53) connection, second impeller (45) and the load-bearing part (53) are cooperatively connected.
7. vibration isolator according to claim 6, which is characterized in that the connecting rod (52) wears through the support portion (20)
At least part, there are on the support portion (20) avoid holes for avoiding the load-bearing part (53), the load-bearing part (53) with
The connecting rod (52) is threadedly coupled or welding.
8. vibration isolator according to claim 1, which is characterized in that the elastic portion (40) is multiple, multiple elasticity
Portion (40) is distributed in the circumferential direction of the supporting part (50).
9. vibration isolator according to claim 1, which is characterized in that the float portion (30) includes that cylinder (31) and setting exist
Supporting element (32) on the inner wall of the cylinder (31), the supporting element (32) connect with the top of the support portion (20), institute
Stating in cylinder (31) has the second cavity in the top of the supporting element (32), and the elastic portion (40) is arranged in second chamber
In vivo.
10. vibration isolator according to claim 9, which is characterized in that the elastic portion (40) and the float portion (30) are even
It connects, the float portion (30) further includes the first fixing piece (33) being arranged on the inner wall of the cylinder (31), second chamber
For body between the supporting element (32) and first fixing piece (33), the elastic portion (40) further includes guide frame
(43), the top of the guide frame (43) is connect with first fixing piece (33), and the second elastic component (41) setting exists
In the guide frame (43).
11. vibration isolator according to claim 10, which is characterized in that the float portion (30) further include:
The lower part of second fixing piece (34), second fixing piece (34) is connect with the support portion (20), the guide frame
(43) lower part is connect with the top of second fixing piece (34).
12. vibration isolator according to claim 1, which is characterized in that the support portion (20) and the pedestal (11) are spaced
Setting, the lower end surface of the support portion (20) and the upper surface of the pedestal (11) are correspondingly arranged, and the vibration isolator further includes close
Sealing (60), the sealing element (60) is set on the support portion (20) and the pedestal (11), to block the support
Gap between portion (20) and the pedestal (11).
13. vibration isolator according to claim 1, which is characterized in that
The float portion (30) includes the supporting element (32) of cylinder (31) and the annular being arranged on the inner wall of the cylinder (31),
There are escape groove (321) on the supporting element (32)；
The support portion (20) can rotate relative to the float portion (30) and the axial movement along the cylinder (31), described
Support portion (20) includes the cover board (22) of frame body (21) and setting on the frame body (21), passes through the support portion (20) and institute
The relative movement of float portion (30) is stated, the cover board (22) can wear through the escape groove (321) and be moved to and institute
State the position that the lower end surface of supporting element (32) abuts.
14. vibration isolator according to claim 1, which is characterized in that the vibration isolator further include:
Damping fluid is arranged in the cavity of the pedestal (11)；
The upper end of damping piece (70), the damping piece (70) is connect with the support portion (20), the lower end of the damping piece (70)
It immerses in the damping fluid.
15. a kind of rail system, the vibration isolator including high quiet low dynamic stiffness characteristic, which is characterized in that the vibration isolator is right
It is required that vibration isolator described in any one of 1 to 14.
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| CN201910628663.0A CN110285182B (en) | 2019-07-12 | 2019-07-12 | Vibration isolator with high static and low dynamic stiffness characteristics and track system with vibration isolator |
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| CN201910628663.0A CN110285182B (en) | 2019-07-12 | 2019-07-12 | Vibration isolator with high static and low dynamic stiffness characteristics and track system with vibration isolator |
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| JPH1089412A (en) * | 1996-09-12 | 1998-04-07 | Toyo Tire & Rubber Co Ltd | Vibration insulator |
| CN102619916A (en) * | 2012-04-20 | 2012-08-01 | 吉林大学 | Ultralow frequency vibration isolator based on parallel connection of positive stiffness spring and negative stiffness spring |
| CN205278200U (en) * | 2015-11-21 | 2016-06-01 | 北京市劳动保护科学研究所 | Positive and negative rigidity low frequency isolator that connects in parallel |
| CN107654551A (en) * | 2017-10-25 | 2018-02-02 | 西安交通大学 | A kind of multiple degrees of freedom low frequency vibration isolation device based on mode of oscillation and pendulum modal coupling |
| CN210440516U (en) * | 2019-07-12 | 2020-05-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Vibration isolator with high static stiffness and low dynamic stiffness characteristics and track system with vibration isolator |
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2019
- 2019-07-12 CN CN201910628663.0A patent/CN110285182B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1089412A (en) * | 1996-09-12 | 1998-04-07 | Toyo Tire & Rubber Co Ltd | Vibration insulator |
| CN102619916A (en) * | 2012-04-20 | 2012-08-01 | 吉林大学 | Ultralow frequency vibration isolator based on parallel connection of positive stiffness spring and negative stiffness spring |
| CN205278200U (en) * | 2015-11-21 | 2016-06-01 | 北京市劳动保护科学研究所 | Positive and negative rigidity low frequency isolator that connects in parallel |
| CN107654551A (en) * | 2017-10-25 | 2018-02-02 | 西安交通大学 | A kind of multiple degrees of freedom low frequency vibration isolation device based on mode of oscillation and pendulum modal coupling |
| CN210440516U (en) * | 2019-07-12 | 2020-05-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Vibration isolator with high static stiffness and low dynamic stiffness characteristics and track system with vibration isolator |
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| CN110285182B (en) | 2024-04-09 |
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