CN209067751U - A kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet - Google Patents
A kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet Download PDFInfo
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- CN209067751U CN209067751U CN201821763869.1U CN201821763869U CN209067751U CN 209067751 U CN209067751 U CN 209067751U CN 201821763869 U CN201821763869 U CN 201821763869U CN 209067751 U CN209067751 U CN 209067751U
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- piston
- permanent magnet
- cylinder body
- damping
- damper housing
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Abstract
The utility model relates to a kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet, belong to civil engineering vibration damping technical field of isolation.The utility model includes cylinder body, piston rod and piston, and piston rod is provided in cylinder body, is provided with piston in the middle part of piston rod, permanent magnet is separately positioned on piston and cylinder body both ends；Hydraulically full resisting medium in the seal cavity that cylinder body and piston rod surround, seal cavity are divided into damper housing I and damper housing II via piston, and fluid damping medium is full of damper housing I and damper housing II.It is axial respectively in device end setting permanent magnet along piston, and permanent magnet is set on piston, the interaction force of end permanent magnet and piston permanent magnet is homopolar-repulsion.
Description
Technical field
The utility model relates to a kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet, belong to civil engineering vibration damping
Technical field of isolation.
Background technique
Vibration control of civil engineering structure technology can be divided into four classes: active control, half master according to the input to external ability
Dynamic control, passive control and mixing control.Passive control is usually certain part add-on subsystem in the structure, or certainly to structure
Some framework of body is constructively handled, to change the dynamic characteristics of structure.It is defeated that passive control does not need extra power
Enter and generate control force, control force, which is control device, vibrates generation with structure, therefore passive control is a kind of economic and letter
Single easy method.It is divided into base isolation, energy-dissipating and shock-absorbing and power energy-absorbing damping three categories according to the difference of control mechanism.
Passive viscous damper belongs to the scope of energy-dissipating and shock-absorbing technology, refers to certain position setting damping members in the structure
Hysteresis deformation dissipation energy occurs when structural vibration deformation to reduce the strain energy of distortion of structural elements and reduces structure for part
Vibration deformation.According to the difference of damper Energy Dissipation Mechanism, displacement relationship type damper, velocity-dependent damper can be divided into and answered
Mould assembly damper: displacement relationship type damper is dissipated under earthquake reciprocating by its good plasticity hysteresis energy dissipating ability
Seismic energy, the seismic energy that damper dissipates are related with the deflection of damper；Velocity-dependent damper is usually by viscous
Or viscoelastic material is made, using viscous and viscoelastic material characteristic come the seismic energy that dissipates, resistance under earthquake reciprocating
The seismic energy that Buddhist nun's device dissipates is related to the speed that damper deforms.
The research of passive control technology is more early, without the input of extra power, performance and effect stability, but there are optimal controls
The shortcomings that narrow range processed；The semi- active control technology of newly-developed was, it can be achieved that optimal control to different type seismic wave in recent years
System, has many advantages, such as fast response time, and damping force adjustable extent is wide, but it needs energy input and feedback control.Currently, viscous
The damped coefficient of damper is designed according to associated specifications, after completion of assembly, the resistance of each viscous damper
Buddhist nun's coefficient is will not be changed, i.e., damper power output range is also certain.But in true environment, earthquake, high wind etc.
Natural calamity tends to exceed the damping force range of damper, and damper is made to be destroyed and cannot play a role.Therefore, design is opened
Send out new type of passive formula variable damping damper a kind of, learn from other's strong points to offset one's weaknesses have both it is passive and half actively two kinds of control modes the advantages of, have
Important economic benefit and social benefit.
Summary of the invention
Place in view of the shortcomings of the prior art, the utility model proposes a kind of enhanced variation rigidities of built-in permanent magnet
Viscous damping devices, the purpose is to be not necessarily to extra power, sensor and controller.The utility model cloth on portion's piston in the device
A permanent magnet is set, permanent magnet diameter is less than device inner diameter；Meanwhile one permanent magnet is not set in device end part, with piston
The interaction force of permanent magnet is homopolar-repulsion, and is consolidated with device end.It is opened when movement band piston occurs for device piston rod
Begin to move, in certain moving range, active force will not be generated between magnet, device damping force is passed through between damping by viscous fluid
Gap generates；When moving distance is larger in one direction for piston, repulsive force is generated between permanent magnet, it is total on device piston rod at this time
Active force by between magnet repulsion and viscous fluid be made up of the damping force that damping clearance generates.Due to repelling between magnet
Power and the relationship of displacement are a kind of non-linear relations, therefore when magnet is apart from each other, generate as distance is closer and bigger
Active force it is smaller；As the distance decreases, active force can then generate sufficiently large repulsive force with increasing in a non-linear manner,
To meet the needs of vibration control.It is a kind of variable stiffness apparatus since the variation of active force is as displacement changes.
The enhanced variation rigidity viscous damping devices of built-in permanent magnet described in the utility model, including cylinder body, piston rod and
Piston is provided with piston rod in cylinder body, is provided with piston in the middle part of piston rod, permanent magnet is separately positioned on piston and cylinder body two
End；Hydraulically full resisting medium in the seal cavity that cylinder body and piston rod surround, seal cavity are divided into damper housing I via piston
With damper housing II, fluid damping medium is full of damper housing I and damper housing II.It is axially set respectively in device end along piston
Permanent magnet is set, and permanent magnet is set on piston, the interaction force of end permanent magnet and piston permanent magnet is homopolar-repulsion.It is living
It fills in permanent magnet diameter and is less than barrel, gap is damping clearance between the two；When piston setting in motion, make to press in a damper housing
Strong to increase, resisting medium flows into another damper housing by damping clearance, and has an effect with damping clearance and generate damping force.
Preferably, the magnetic force of piston permanent magnet and end permanent magnet need to use strong magnets, and the repulsive force generated should foot
It is enough big, to meet the needs of device design.Device end permanent magnet is located at device end, and consolidates with device sealing element, keeps
Device leakproofness.
Preferably, the repulsive force generated between permanent magnet is configured in advance, and piston is located at cylinder body middle, when piston phase
When to cylinder body setting in motion, in certain moving range between permanent magnet there is no magnetic force, damping force passes through resistance by fluid media (medium)
Buddhist nun gap generates, this extreme position for not having magnetic force to generate is known as equilbrium position；Forever when piston motion is more than equilbrium position
Generate repulsive force between magnet, this repulsive force with distance is closer between magnet and exponential type increases, power displacement relation is non-
Linearly, the viscous damping force that total force is generated by fluid media (medium) by damping clearance at this time is formed with magnetic repulsive force.
Preferably, permanent magnet size need to carry out reasonable Arrangement according to the end face size and cylinder body end face size of piston.
Preferably, when piston is between equilbrium position, the relative velocity of resisting medium pressure and piston in cylinder body
It is directly proportional；When piston motion is more than equilbrium position, the active force of cylinder body can be with the moving distance of piston rod and exponential type increases
Greatly.
Preferably for each damper housing, when piston rod is pushed forward, fluid damping medium is from damper housing II through overdamp
Gap flows into damper housing I；Conversely, fluid damping medium flows into resistance by damping clearance from damper housing I when drawing outside piston rod
Buddhist nun's cavity II.
Preferably, the end of cylinder body and the end of piston rod are all made of hinged fixation, and are attached by ball hinge.
Preferably, end permanent magnet symmetrically arranges that resisting medium is to work along cylinder body axis with the permanent magnet on piston
The active force of plug is uniform, avoids result in cylinder body inclination, increases the frictional force of piston and cylinder body.
The beneficial effects of the utility model are: viscous using the bright enhanced variation rigidity of built-in permanent magnet of utility model
Damping unit is that a kind of displacement relationship type variation rigidity is viscous to design simple, easy to process, the stable viscous damper of performance
Damper, compared with traditional viscous damper, the control process of the device does not need sensor, does not need extra power, and have
There is self adaptive control feature.
Detailed description of the invention
Fig. 1 is one of structural schematic diagram of the utility model.
Fig. 2 is the state diagram that piston rod is pushed forward.
Fig. 3 is the state diagram drawn outside piston rod.
Fig. 4 is the radial cross-section of Fig. 1.
In figure: 1, cylinder body, 2, piston rod, 3, piston；4, damper housing I；5, damper housing II；6, end permanent magnet；7,
Sealing element；8, clamping screw；9, connector；10, flexural pivot；11, equilbrium position.
Specific embodiment
In order to which the utility model aim, technical solution is more clearly understood, below with reference to embodiment, to the utility model
It is described in further detail.
As shown in Figures 1 to 4, the enhanced variation rigidity viscous damping devices of built-in permanent magnet described in the utility model, packet
Cylinder body 1, piston rod 2 and piston 3 are included, piston rod 2 is provided in cylinder body 1, piston 3, cylinder body 1 and work are provided in the middle part of piston rod 2
Hydraulically full resisting medium in the seal cavity that stopper rod 2 surrounds, seal cavity are divided via piston 3 for damper housing I 4 and damping cavity
Body II 5, fluid damping medium are full of damper housing I 4 and damper housing II 5, a permanent magnet are arranged on piston 3, and in device
End is respectively set end permanent magnet 6 and is fixedly arranged on sealing element 7, is tightly connected by locking nut 8 and cylinder body 1, and connector 9 is solid
It is scheduled on sealing element 7, while fixed ball hinge 10.
When device remains static, between equilbrium position 11, piston 3 does not produce piston 3 with end permanent magnet 6
Raw repulsive force；When 31 setting in motion of opposing cylinder of piston, resisting medium is flowed by damping clearance by side damper housing another
Side damper housing, piston 3 move between equilbrium position, and viscous damping force is provided by resisting medium by damping clearance；When
When 3 opposing cylinder of piston, 1 move distance is more than equilbrium position, repulsive force, repulsive force are generated between piston 3 and end permanent magnet 6
Size with the close of distance and exponential type increases, device total force is made of viscous damping force and permanent magnet repulsion power.
For each damper housing, when piston rod 2 is pushed forward, fluid damping medium passes through damping clearance from damper housing II 5
Flow into damper housing I 4；Conversely, fluid damping medium flows into damping by damping clearance from damper housing I 4 when drawing outside piston rod
Cavity II 5.
There are symmetrical bolts hole at cylinder body 1 both ends, are threadedly coupled sealing element 7 with cylinder body 1 by tightening bolt 8；Fixed spiral shell
Bolt then successively stationary housing 1, sealing element 8.Sealing element keeps face seal to contact with piston rod 2, accomplishes that resisting medium is not outer
It lets out.The selection of resisting medium needs to need to carry out according to corresponding design.
The diameter of permanent magnet need to be closed with thickness according to the size of 3 end face of piston and the demand of damped coefficient on piston 3
Reason design.The size of permanent magnet on piston 3 is rationally set, the easy to operate of equipment can be made, the cost of processing and manufacturing also obtains
Effective control.
End permanent magnet 6 symmetrically arranges along cylinder body axis with 3 permanent magnet of piston, work of the resisting medium to piston 3
Firmly uniformly, cylinder body inclination is avoided result in, the frictional force of piston and cylinder body is increased.
Claims (8)
1. a kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet, including cylinder body (1), piston rod (2) and piston (3),
It is provided with piston rod (2), is provided with piston (3) in the middle part of piston rod (2), permanent magnet (6) is separately positioned on piston in cylinder body (1)
(3) on and cylinder body (1) both ends；Hydraulically full resisting medium in the seal cavity that cylinder body (1) and piston rod (2) surround, seal chamber
Body is divided into damper housing I (4) and damper housing II (5) via piston (3), and fluid damping medium is full of damper housing I (4) and resistance
Buddhist nun's cavity II (5), which is characterized in that it is axial respectively in device end setting permanent magnet (6) along piston (3), and on piston (3)
It is arranged permanent magnet (6), the interaction force of end permanent magnet and piston permanent magnet is that homopolar-repulsion piston permanent magnet diameter is less than
Barrel, gap is damping clearance between the two；When piston setting in motion, increase pressure in a damper housing, resisting medium
Another damper housing is flowed by damping clearance, and has an effect with damping clearance and generates damping force.
2. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that living
The magnetic force for filling in permanent magnet and end permanent magnet need to use strong magnets, and the repulsive force generated is sufficiently large, and is set with meeting device
The needs of meter, device end permanent magnet is located at device end, and consolidates with device sealing element, holding meanss leakproofness.
3. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that forever
The repulsive force generated between magnet is configured in advance, and piston (3) is located at cylinder body middle, when piston (3) opposing cylinder (1) is opened
Begin movement when, in certain moving range between permanent magnet (6) there is no magnetic force, damping force passes through damping clearance by fluid media (medium)
It generates, this extreme position for not having magnetic force to generate is known as equilbrium position (11)；Forever when piston (3) moves past equilbrium position
Generate repulsive force between magnet (6), this repulsive force with distance is closer between magnet and exponential type increases, power displacement relation is
Non-linear, the viscous damping force that total force is generated by fluid media (medium) by damping clearance at this time is formed with magnetic repulsive force.
4. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that forever
Magnet (6) size need to carry out reasonable Arrangement according to the end face size and cylinder body (1) end face size of piston (3).
5. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that when
When piston (3) is between equilbrium position, the resisting medium pressure in cylinder body (1) is directly proportional to the relative velocity of piston (3)；When
When piston (3) moves past equilbrium position, the active force of cylinder body (1) can be with the moving distance of piston rod (2) and exponential type increases
Greatly.
6. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that right
In each damper housing, when piston rod is pushed forward, fluid damping medium flows into damper housing by damping clearance from damper housing II
Ⅰ；Conversely, fluid damping medium flows into damper housing II by damping clearance from damper housing I when drawing outside piston rod.
7. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that cylinder
The end of body (1) and the end of piston rod (2) are all made of hinged fixation, and are attached by ball hinge (10).
8. the enhanced variation rigidity viscous damping devices of a kind of built-in permanent magnet according to claim 1, which is characterized in that end
Portion's permanent magnet symmetrically arranges that resisting medium is equal to the active force of piston (3) along cylinder body (1) axis with the permanent magnet on piston
It is even, cylinder body inclination is avoided result in, the frictional force of piston (3) and cylinder body (1) is increased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763869.1U CN209067751U (en) | 2018-10-30 | 2018-10-30 | A kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763869.1U CN209067751U (en) | 2018-10-30 | 2018-10-30 | A kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet |
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| Publication Number | Publication Date |
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| CN209067751U true CN209067751U (en) | 2019-07-05 |
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|---|---|---|---|
| CN201821763869.1U Expired - Fee Related CN209067751U (en) | 2018-10-30 | 2018-10-30 | A kind of enhanced variation rigidity viscous damping devices of built-in permanent magnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524195A (en) * | 2020-11-30 | 2021-03-19 | 安徽江淮汽车集团股份有限公司 | Magnetic damping shock absorber |
-
2018
- 2018-10-30 CN CN201821763869.1U patent/CN209067751U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524195A (en) * | 2020-11-30 | 2021-03-19 | 安徽江淮汽车集团股份有限公司 | Magnetic damping shock absorber |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190705 Termination date: 20201030 |