CN110285180A - 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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- CN110285180A CN110285180A CN201910628458.4A CN201910628458A CN110285180A CN 110285180 A CN110285180 A CN 110285180A CN 201910628458 A CN201910628458 A CN 201910628458A CN 110285180 A CN110285180 A CN 110285180A
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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 34
- 239000012530 fluid Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims 1
- 238000002955 isolation Methods 0.000 abstract description 39
- 230000000694 effects Effects 0.000 abstract description 15
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 230000003068 static effect Effects 0.000 description 11
- 238000007667 floating Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000003993 interaction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
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- 230000005540 biological transmission 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
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- 238000011068 loading method Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 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
-
- 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, the vibration isolator of high quiet low dynamic stiffness characteristic 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；Negative stiffness component, negative stiffness component include mutually matched elastic portion and supporting part, and elastic portion is connect with support portion and/or float portion, and supporting part is connect with pedestal；In the case where bearing load and compressing the first elastic component, the direction for the active force that elastic portion applies to supporting part tilts or is vertically arranged with respect to the direction of the elastic force of the first elastic component float portion.By the technical solution, it 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 that driving frequency is greater than vibrating isolation system intrinsic frequency can just play vibration isolating effect.Generally
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 mutually matched elastic portion and supporting part, and elastic portion is connect with support portion and/or float portion, carrying
Portion is connect with pedestal；Float portion is in the case where bearing load and compressing the first elastic component, work that elastic portion applies to supporting part
Direction firmly tilts or is vertically arranged with respect to the direction of the elastic force of the first elastic component.
Further, elastic portion includes the second elastic component and the impeller that connect with the second elastic component, at the second elastic component
In compressive state, impeller is abutted with supporting part.
Further, supporting part has first surface, and for the second elastic component during flexible, impeller can be with first
The different location of curved surface abuts.
Further, impeller has the second curved surface, and the position on the second curved surface is abutted with the position on first surface.
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, impeller is abutted with load-bearing part.
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 connect with support portion, and elastic portion is arranged in the first cavity of support portion.
Further, support portion includes: frame body, and supporting part, which is worn, passes through frame body；The top of frame body is arranged in cover board, lid
There is the first cavity, the second elastic component is connect with the side wall of the first cavity, and float portion is connect with cover board between plate and frame body.
Further, elastic portion further include: guide frame, guide frame is horizontally disposed in the first cavity, the second elasticity
Part is arranged in guide frame.
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, 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, 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, and elastic portion applies to supporting part
Active force direction relative to the first elastic component elastic force direction inclination.In this way, positive rigidity component and negative stiffness component are matched
The elastic force generated is closed, the displacement with float portion is in non-linear relation, and the vibration isolator in this way can obtain lower vibration isolation simultaneously and rise
Beginning frequency and higher static bearing capacity, i.e., static rigidity with higher and lower dynamic rate characteristic (abbreviation Gao Jing
It is 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 system
In, the isolation frequency range of rail system can be improved, reduce low frequency vibration transmitting, reduce 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 offer of the embodiment of the present invention one；
Fig. 2 shows force diagram of the elastic portion to supporting part at work of the vibration isolator in Fig. 1；
Fig. 3 shows the arrangement schematic diagram of the elastic portion in the vibration isolator in Fig. 1；
Fig. 4 shows another arrangement schematic diagram of the elastic portion in the vibration isolator in Fig. 1；
Fig. 5 shows another structural schematic diagram of the elastic portion in the vibration isolator in Fig. 1；
Fig. 6 shows the top view of the vibration isolator in Fig. 1；
Fig. 7 shows the structural schematic diagram of the vibration isolator of the offer of the embodiment of the present invention two.
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, impeller；421, the second curved surface；43, guide frame；44, locating part；50, supporting part；51, first surface；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 6, 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 mutually matched elastic portion 40 and supporting part 50, elastic portion 40 and support portion 20 and/or floating
Dynamic portion 30 connects, and supporting part 50 is connect with the pedestal 11 of positive rigidity component 10；Float portion 30 is bearing load and is compressing the first bullet
Property part 12 in the case where, the side of the direction of the active force that elastic portion 40 applies to supporting part 50 with respect to the elastic force of the first elastic component 12
To tilting or be vertically arranged.Specifically, curved surface of the direction of the interaction force of elastic portion 40 and supporting part 50 along supporting part 50
Normal orientation 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 the pedestal 11 of positive rigidity component 10, and float portion 30 is the case where bearing load and compressing the first elastic component 12
Under, the first elastic component 12 is shunk, and the direction for the active force that elastic portion 40 applies to supporting part 50 is relative to the first elastic component 12
The direction of elastic force tilts.In this way, the elastic force that positive rigidity component 10 and the cooperation of negative stiffness component generate, the displacement with float portion 30
In non-linear relation, the vibration isolator can obtain lower vibration isolation initial frequency and higher static bearing capacity simultaneously in this way, i.e.,
Static rigidity with higher and lower dynamic rate characteristic (referred to as high quiet low dynamic), can completely cut off low frequency vibration, improve
The isolation frequency range of vibration isolator.The vibration isolator is applied in rail system, the isolation frequency model of rail system can be improved
It encloses, reduces low frequency vibration transmitting, reduce the influence to ambient enviroment.
In the present embodiment, elastic portion 40 includes the second elastic component 41 and the impeller 42 connecting with the second elastic component 41,
Second elastic component 41 is in compressive state, and impeller 42 is abutted with supporting part 50.Pass through the second elastic component 41 and impeller 42
Cooperation generates interaction force with supporting part 50.The direction for the active force that second elastic component 41 applies to supporting part 50 opposite first
The direction of the elastic force of elastic component 12 tilts or is vertically arranged.
As shown in Fig. 2, relative displacement, supporting part occur for float portion 30 and supporting part 50 when float portion 30 bears load
50 displacement extends the second elastic component 41, applies active force to supporting part 50.By above-mentioned setting, the first elastic component 12 is to holding
The active force that load portion 50 applies becomes along the component variation in the direction of the elastic force of the first elastic component 12 and the size of the second elastic component 41
Changing is in non-linear relation, and the variation of component and the displacement of float portion 30 are also in non-linear relation, so that it is higher to have vibration isolator
Static rigidity and lower dynamic rate characteristic, that is, have the effect of high quiet low dynamic, compared with conventional vibration isolator, can completely cut off
Low frequency vibration improves the isolation frequency range of vibration isolator.The vibration isolator can completely cut off the low-frequency vibration less than 20Hz.
Specifically, in the present embodiment, the first elastic component 12 can be vertically arranged, the second elastic component 41 is horizontally disposed with
(in the case of not carrying), the in this way vibration isolator can load preferably to vertical direction carry out vibration and noise reducing, be relatively specific for
Rail system.
As shown in Fig. 1 or Fig. 5, supporting part 50 has first surface 51, and the second elastic component 41 pushes during flexible
Part 42 can be abutted with the different location of first surface 51.By the way that first surface 51 is arranged, the second elasticity can be changed as needed
The direction for the active force that part 41 applies supporting part 50, to meet Nonlinear Demand, first surface 51 can be concave, convex,
The shapes such as disc.
In the present embodiment, impeller 42 has the second curved surface 421, position and first surface 51 on the second curved surface 421
On position abut.By the cooperation of the second curved surface 421 and first surface 51, nonlinear force demand can be better achieved,
To realize high quiet low dynamic effect.
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 impeller 42 is abutted with load-bearing part 53.By above-mentioned setting, it may make and hold
Load portion 50 is connect with positive rigidity component 10, and the active force for being easily carried the negative stiffness component of the receiving of portion 50 passes to positive rigidity component
10, so that positive rigidity component 10 and negative stiffness component cooperate jointly carries out vibration damping to load, while vibration is reduced to ambient enviroment
Transmitting, reduce influence to ambient enviroment.Specifically, the power that the second elastic component 41 provides produces impeller 42 and load-bearing part 53
Normal orientation of the raw interaction force direction along load-bearing part 53.
It should be noted that the first surface 51 on load-bearing part 53 and load-bearing part 53 on supporting part 50 is all can basis
Actual demand be designed to it is of different shapes, the shape and sliding type of the impeller 42 in elastic portion 40 can also carry out it is a variety of not
With change, such as increasing bearing makes sliding become to roll or the front end of impeller 42 also increases bearing, make impeller 42 with
51 contact slide of first surface of load-bearing part 53 becomes the modes such as contact rolling.No matter how its shape and mode change, former
Reason 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 order to guarantee the stability of load-bearing part 53, need to install check washer and stop nut, load-bearing part 53 is in connecting rod 52
On position it is adjustable, when load-bearing part 53 is installed, the surface contact of the lower surface of load-bearing part 53 and impeller 42, and provide one
Fixed pressure, then the second elastic component 41 is compressed because of the presence of pressure, provides certain rigidity.
In the present embodiment, elastic portion 40 is connect with support portion 20, and the first cavity of support portion 20 is arranged in elastic portion 40
It is interior.It may make that vibration isolator structure is compact in this way, and compared with original vibration isolator, overall structure is with low uncertainty, can reduce to phase
The influence of component is closed, convenient for manufacture and assembly.
Specifically, support portion 20 includes: frame body 21, and supporting part 50 is worn through frame body 21；Cover board 22 is arranged in frame body 21
Top, there is the first cavity, the second elastic component 41 connect with the side wall of the first cavity, float portion between cover board 22 and frame body 21
30 connect with cover board 22.It may make that vibration isolator structure is compact in this way, and play the effect of good vibration and noise reducing.
In the present embodiment, elastic portion 40 further include: guide frame 43, guide frame 43 are horizontally set on the first cavity
Interior, the second elastic component 41 is arranged in guide frame 43.By guide frame 43 can shrinkage direction to the second elastic component 41 into
Row guidance with the direction of preferably control action power, and is convenient for the assembly of elastic portion 40.Guide frame 43 can be set to slot
Shape structure or tubular structure.
As shown in Figure 3 and Figure 4, elastic portion 40 can be set to multiple, and multiple elastic portions 40 are distributed in the week of supporting part 50
To.Negative stiffness component can be improved in this way to the entire effect of vibration isolator, improve the effect of nonlinear characteristic, improve vibration isolator
Isolation frequency range.Furthermore, it is possible to make the stress of supporting part 50 relatively uniform.
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.
As shown in figures 1 to 6, 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.
As shown in Figure 1, vibration isolator further include: damping fluid is arranged in the cavity of pedestal 11；Damping piece 70, damping piece 70
Upper end connect with support portion 20, the lower end of damping piece 70 is immersed in damping fluid.By above-mentioned setting, support portion 20 is bearing to carry
When lotus, the vibration of generation can be transmitted in damping fluid by damping piece 70, can be to vibrating by the damping of damping fluid
To effect is slowed down, to play the effect of vibration and noise reducing.Specifically, damping piece 70 includes rod-like element and is arranged below rod-like element
Discoid pieces, the upper end of rod-like element is connect with support portion 20.It, can be by rod-like element in order to improve bonding strength and transmission effect
It is set as multiple, multiple rod-like elements are arranged around supporting part 50.Damping fluid is poured in height certain in pedestal 11, provides system
The damped coefficient needed.
As shown in fig. 7, unlike the embodiments above, float portion 30 includes cylinder in the embodiment of the present invention two
31 and the supporting element 32 that is arranged on the inner wall of cylinder 31, supporting element 32 connect with the top of support portion 20, cylinder 31 is interior to be propped up
The top of support member 32 has the second cavity, and elastic portion 40 is arranged in the second cavity.Elastic portion 40 can in float portion 30
Structure connection, can also 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.
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, 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.Second elastic component 41 can be limited by locating part 44, so that
Second elastic component 41 carries out limit and keeps compressive state, and the second elastic component 41 is avoided to deviate from from guide frame 43.
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 the pedestal 11 of positive rigidity component 10, and float portion 30 is the case where bearing load and compressing the first elastic component 12
Under, the first elastic component 12 is shunk, and the direction for the active force that elastic portion 40 applies to supporting part 50 is relative to the first elastic component 12
The direction of elastic force tilts.In this way, the elastic force that positive rigidity component 10 and the cooperation of negative stiffness component generate, the displacement with float portion 30
In non-linear relation, the vibration isolator can obtain lower vibration isolation initial frequency and higher static bearing capacity simultaneously in this way, i.e.,
Static rigidity with higher and lower dynamic rate characteristic (referred to as high quiet low dynamic), can completely cut off low frequency vibration, improve
The isolation frequency range of vibration isolator and the isolation frequency range of rail system reduce low frequency vibration transmitting, reduce to week
The influence in collarette border.Using the technical solution, in strict control or under the premise of reduce track dynamic displacement, reduce it is existing every
The intrinsic frequency of vibration device and its rail 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, impeller 42 move downward simultaneously, and pedestal 11 is placed on roadbed
On, 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
Original in compressive state for the second elastic component 41 of negative stiffness, with the decline of impeller 42 simultaneously, the second elastic component 41 is opened
Beginning loosens, to supporting part 50 provide thrust, 42 front end of impeller along load-bearing part 53 surface slide downward.
After train warp, the first elastic component 12 starts to loosen offer thrust, then support portion 20, guide frame 43, second
Elastic component 41, impeller 42 move upwards simultaneously with cylinder 31, and 42 front end of impeller is upward along the surface of load-bearing part 53 at this time
Sliding, the second elastic component 41 start to compress, and provide rigidity.Whole system is provided because of the cooperation of load-bearing part 53 and impeller 42
Nonlinear power.The schematic diagram of the present embodiment is as shown in Fig. 2, when train passes through, and negative stiffness component moves downward, load-bearing part 53
It changes with the relative position of impeller 42, the direction for the power that negative stiffness component provides can become because of contact surface change in shape
Change.Using the nonlinear dynamic characteristic of the vibration isolator, the high-performance track vibration damping with high quiet low dynamic stiffness feature is constituted
System.
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 (18)
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 mutually matched elastic portion (40) and supporting part (50), the elastic portion
(40) it is connect with the support portion (20) and/or the float portion (30), the supporting part (50) connect with the pedestal (11)；
The float portion (30) bearing load and in the case where compress the first elastic component (12), the elastic portion (40) to
The direction inclination or vertical of the elastic force of relatively described first elastic component (12) in direction for the active force that the supporting part (50) applies
Setting.
2. vibration isolator according to claim 1, which is characterized in that the elastic portion (40) include the second elastic component (41) and
The impeller (42) connecting with second elastic component (41), second elastic component (41) are in compressive state, the promotion
Part (42) is abutted with the supporting part (50).
3. vibration isolator according to claim 2, which is characterized in that the supporting part (50) has first surface (51), institute
The second elastic component (41) is stated during flexible, the impeller (42) can be with the different location of the first surface (51)
It abuts.
4. vibration isolator according to claim 3, which is characterized in that the impeller (42) has the second curved surface (421), institute
The position stated on the second curved surface (421) is abutted with the position on the first surface (51).
5. vibration isolator according to claim 2, 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, the impeller (42) abut with the load-bearing part (53).
6. vibration isolator according to claim 5, 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.
7. vibration isolator according to claim 2, which is characterized in that the elastic portion (40) and the support portion (20) are even
It connects, the elastic portion (40) is arranged in the first cavity of the support portion (20).
8. vibration isolator according to claim 7, which is characterized in that the support portion (20) includes:
Frame body (21), the supporting part (50) wear through the frame body (21)；
Cover board (22) is arranged between the top of the frame body (21), the cover board (22) and the frame body (21) described in having
First cavity, second elastic component (41) connect with the side wall of first cavity, the float portion (30) and the cover board
(22) it connects.
9. vibration isolator according to claim 7, which is characterized in that the elastic portion (40) further include:
Guide frame (43), the guide frame (43) are horizontally set in first cavity, second elastic component (41)
Setting is in the guide frame (43).
10. 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).
11. vibration isolator according to claim 2, which is characterized in that the float portion (30) includes cylinder (31) and setting
Supporting element (32) on the inner wall of the cylinder (31), the supporting element (32) connect with the top of the support portion (20),
There is the second cavity in the top of the supporting element (32) in the cylinder (31), the elastic portion (40) is arranged described second
In cavity.
12. vibration isolator according to claim 11, 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).
13. vibration isolator according to claim 12, 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).
14. vibration isolator according to claim 12, 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.
15. 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).
16. 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.
17. 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.
18. 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 17.
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| CN201910628458.4A CN110285180B (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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| CN111041904A (en) * | 2019-12-30 | 2020-04-21 | 济南轨道交通集团有限公司 | Shock attenuation subway rail set |
| CN112871575A (en) * | 2021-01-12 | 2021-06-01 | 株洲时代新材料科技股份有限公司 | Vibration isolator damping agent pouring production line and production method |
| CN113124998A (en) * | 2021-03-26 | 2021-07-16 | 中铁二院工程集团有限责任公司 | Rail rigidity time-frequency measurement method based on P2 force vibration |
| CN114658749A (en) * | 2022-04-15 | 2022-06-24 | 维沃移动通信有限公司 | Hinge mechanism and electronic device |
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| CN114658749B (en) * | 2022-04-15 | 2024-01-12 | 维沃移动通信有限公司 | Hinge mechanism and electronic device |
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