CN102943838B - Base vibration isolation device with spring and magnetic fluid - Google Patents

Base vibration isolation device with spring and magnetic fluid Download PDF

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Publication number
CN102943838B
CN102943838B CN201210483496.3A CN201210483496A CN102943838B CN 102943838 B CN102943838 B CN 102943838B CN 201210483496 A CN201210483496 A CN 201210483496A CN 102943838 B CN102943838 B CN 102943838B
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base
spring
magnetic fluid
vibration
vibration isolator
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CN102943838A (en
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陈忠海
陈彦北
郭强
李金卫
涂奉臣
邓娇
孙照亮
姜其斌
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Zhuzhou Times New Material Technology Co Ltd
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Zhuzhou Times New Material Technology Co Ltd
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Abstract

The invention provides a base vibration isolation device with a spring and a magnetic fluid. The base vibration isolation device comprises a vibration isolation device outer cylinder and a vibration isolation device core part, wherein the vibration isolation device outer cylinder is provided with a vibration isolation device bottom plate and a fixing base, the vibration isolation device core part comprises a barrel, two ends of the barrel are sealed through a top cover assembly and a bottom cover assembly respectively, the upper end of the barrel is installed below the fixing base of the vibration isolation device outer cylinder in a matching mode through the top cover assembly, the lower end of the barrel penetrates through an opening in the vibration isolation device bottom plate, extends out of the opening and contacts with the surrounding through the bottom cover assembly, an inner annular wall which is installed at the center of the bottom cover assembly is arranged inside the barrel to divide the space inside the barrel into an outer side cavity and an inner side cavity, the upper portion of the outer side cavity and the upper portion of the inner side cavity are communicated with each other, the vibration isolation device core part also comprises an internal permanent magnet, a magnetic rheological medium and the spring, the internal permanent magnet is arranged inside the inner side cavity, and the magnetic rheological medium and the spring are arranged inside the outer side cavity. The base vibration isolation device with the spring and the magnetic fluid is simple in structure, convenient to maintain and capable of adjusting the damping ratio simultaneously.

Description

Spring magnetic fluid isolation-base
Technical field
The present invention relates to a kind of basis and subtract/vibration isolator.More particularly, the present invention relates to a kind of for weakening and isolating industry equipment or the track vehicle spring magnetic fluid isolation-base to the vibration of surrounding environment and noise pollution.
Background technique
In modern society, the operation of track vehicle and industry equipment inevitably brings the problem of vibration & noise.Vibration not only affects the precision of apparatus measures and equipment processing, and people also can be caused normally to work or to live.In severe cases, vibration can produce larger dynamic stress in the structure and affect the safety of structure, and the propagation simultaneously vibrated also can produce harmful effect to surrounding environment.
Along with the fast development of track traffic industry, a large amount of high ferros or subway can pass through as places such as residential belt, school, hospital and concert halls, easily to the puzzlement that the live and work of resident causes serious injury.In addition, develop rapidly along with manufacturing, usually the Large-Scale Equipment that larger vibration disturbs power and vibration is furnished with, as large-scale general equipment blower, air compressor, large pump, heat-exchanger, centrifuge, shredder, press machine and forging hammer machine etc. in industrial region.In addition, vibration is required that very strict precision instrument and equipment also gets more and more, as large-scale precision lathe, large-scale three coordinate measuring machine.In order to meet the needs of production technology, only relying on the design taked in self structure, being sometimes difficult to the requirement meeting vibration control.Namely allow to meet damping requirements by some limited means, its Technological Economy cost is also not too reasonable.
In many cases, basic vibration isolation (vibration damping) is taked to be one of most economical effective measures.Spring foundation vibration isolator is the combination of a kind of rheid damping unit and spring cushion, is a kind of effective vibration damping and vibration isolation control gear.Its technical thought is, by it with subtract vibration isolation object and be mounted for and overall subtract vibration isolation system, the natural frequency directly realizing its design by the rigidity of control spring is reduced to the frequency of okperation of the excitation force away from equipment.Spring foundation vibration isolator be performance characteristics comprise tuning, power consumption and vibration isolation.
But, in the engineer applied of reality, subtract vibration isolation object if large-scale experiment machine is based on the application of reality, the replacing of vitals may occur, or in the application of actual frock, significantly increasing of associated mass makes the quality of self or excitation force parameter have greatly changed.Subtract vibration isolation efficiency in order to what ensure spring foundation vibration isolator, require that corresponding parameter adjustment is made in spring vibration-isolator rigidity and damping in a similar condition.Current spring foundation vibration isolator cannot meet this requirement.
Summary of the invention
For above-mentioned technical problem, object of the present invention provides a kind of spring magnetic fluid isolation-base, and its structure is simple, easy to maintenance, can realize damping ratio semi-automatic adjustable simultaneously.That is, when the vibration of vibration isolation object is less, the damping of this steel spring magnetic fluid isolation-base is smaller; And when the amplitude of vibration isolation object increases, generally occur in system resonance district, its damping ratio also increases thereupon, dynamic system response decay can be rapider.
According to the invention provides a kind of spring magnetic fluid isolation-base, comprising: vibration isolator outer cylinder body, it has vibration isolator base plate and fixed base; And vibration isolator core members, it comprises the cylindrical shell that two ends are sealed respectively by cap assembly and bottom assembly, the upper end of described cylindrical shell coordinates the below being arranged on described fixed base by cap assembly, and the lower end of described cylindrical shell is stretched out through the opening in described vibration isolator base plate, and contacted with surrounding environment by bottom assembly.Wherein, in described cylindrical shell, be provided with the inner annular wall at the center that is in be installed on bottom assembly, thus the space in cylindrical shell be separated into lateral compartments and medial compartment that top communicates with each other.Described vibration isolator core members also comprises the interior permanent magnets be located in medial compartment, and the magnetorheological medium be located in lateral compartments and spring.
In one embodiment, described spring housing is contained on inner annular wall.For this reason, inner annular wall is as the guide pillar of spring, and its external diameter should be suitable by the internal diameter of relevant design normative choice one-tenth and spring.
In one embodiment, described cap assembly is provided with the center guide pillar extended downwardly in described medial compartment, described interior permanent magnets is arranged in the region of below the liquid level being in described magnetorheological medium in described guide pillar.
In one embodiment, described interior permanent magnets is be co-axially mounted on the Tapered Cup on described guide pillar, and the diameter of described Tapered Cup increases gradually along the direction from the lower end of described guide pillar to upper end.
In one embodiment, described interior permanent magnets comprises several and is co-axially mounted on ring part on guide pillar, and the pole strength of each ring part increases gradually along the direction from the lower end of described guide pillar to upper end.
In one embodiment, described interior permanent magnets comprises multiple inner permanent magnetic block that uniform intervals is opened in the circumference of described guide pillar, and on the inwall of described cylindrical shell, be provided with the outside permanent magnets corresponding with inner permanent magnetic block described in each.
In one embodiment, described cylindrical shell comprises the upper cylinder part be fixed on cap assembly, the lower cylinder body part be fixed on bottom assembly, and by flexible shroud connected for upper and lower shell portion.
In one embodiment, described cap assembly comprises the internal head cover that sealed type direct with cylindrical shell contacts, and with the outer top cover of the mutual bearing engagement of fixed base.
In one embodiment, the outer wall of described vibration isolator outer cylinder body is provided with adjutage, so that the installation of vibration isolator in vibration damping object.
In one embodiment, described bottom assembly comprises support plate and is arranged on the vibration isolation coating on the bottom surface of support plate.
Spring magnetic fluid isolation-base according to the present invention have employed the combination of spring and magnetorheological medium, thus defines a kind of effective vibration damping and vibration isolation device.By selecting or changing spring, the rigidity of isolation-base just can be regulated easily.In addition, by the magnetic size of changing permanent magnet or the distance changed between permanent magnet and magnetorheological medium, i.e. the insertion depth of guide pillar inner core inside bottom oil cylinder, just can the size of damping adjusting.Especially outstanding premium properties is that the action of guide pillar is consistent with the dynamic respond of vibration isolation object.When the displacement amplitude of vibration isolation object becomes large, the insertion depth that guide pillar is inserted in medial compartment is larger, and now vibration isolator damping capacity increases; Otherwise damping capacity then diminishes.Thus, can easily the tuning performance of optimized integration vibration isolator and damping ratio adjustable.Apply spring magnetic fluid isolation-base according to the present invention and carry out basic vibration isolation; when can ensure track vehicle and industry equipment work, the vibration that causes is to the propagation of environment and pollution; thus balance, precision and safety required when ensureing that the equipment with high-precision requirement runs; near protecting resident and industry equipment, staff pollutes from noise and vibration, ensures physically and mentally healthy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, technological scheme of the present invention is described in further details.Easy understand, these accompanying drawings are only understood the present invention for convenience and provide, and not delimit the scope of the invention.
Fig. 1 shows the sectional view according to spring magnetic fluid isolation-base of the present invention.
Fig. 2 shows the sectional view of the vibration isolator core members in the magnetic fluid of spring shown in Fig. 1 isolation-base.
The interior permanent magnets that Fig. 3 shows the circumferentially formula be arranged on guide pillar and the external permanent magnets be arranged on cylindrical shell.
Fig. 4 shows the interior permanent magnets of Tapered Cup form.
Fig. 5 shows the interior permanent magnets of the ring part form of multiple stacked setting.
Fig. 6 shows spring magnetic fluid isolation-base according to the present invention and subtracts application in vibration isolation at rail vehicle.
Fig. 7 shows according to the application of spring magnetic fluid isolation-base of the present invention in Turbo-generator Set.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Fig. 1 shows according to spring magnetic fluid isolation-base 100 of the present invention.This spring magnetic fluid isolation-base 100 comprises the vibration isolator outer cylinder body 8 of substantial cylindrical, is provided with the vibration isolator base plate 13 with opening bottom it.The inwall of vibration isolator outer cylinder body 8 such as secures fixed base 7 by welding, its outer wall also can be provided with adjutage 9, for realizing spring magnetic fluid isolation-base 100 well fixing in vibration isolation object (such as machinery, track vehicle etc.).Easy understand, in one embodiment, fixed base 7 such as can be formed as an integral part of vibration isolator outer cylinder body 8 by pre-shaping means.
Spring magnetic fluid isolation-base 100 also comprises vibration isolator core members 18, its upper end coordinates the below of the fixed base 7 be arranged on the inwall being fixed on vibration isolator outer cylinder body 8, and lower end is stretched out through the opening in vibration isolator base plate 13, thus contact with surrounding environment (such as ground etc.).
Vibration isolator core members 18 is introduced in detail below in conjunction with Fig. 1 and 2.As shown in the figure, vibration isolator core members 18 comprises the cylindrical shell 15 of substantial cylindrical, and its top and bottom are respectively by cap assembly and bottom component sealing.In the illustrated embodiment, cap assembly is configured to double-piece type, comprises and the cylindrical shell 15 directly internal head cover 10 that contact of sealed type, and with the outer top cover 6 of the mutual bearing engagement of fixed base 7.Can be connected with each other by usual manner (be such as threaded, gluing etc.) between internal head cover 10 and outer top cover 6.What can realize between the upper end of vibration isolator core members 18 and the inwall of vibration isolator outer cylinder body 8 thus is good fit.In addition, in the illustrated embodiment, bottom assembly comprises the support plate 17 that sealed type direct with cylindrical shell 15 contacts, and is arranged on the vibration isolation coating 16 on the bottom surface of support plate 17.Like this, vibration isolator core members 18 is contacted with surrounding environment by vibration isolation coating 16.
The support plate 17 of vibration isolator core members 18 is provided with surrounding wall 4 in center.This interior surrounding wall 4 upwards extends from support plate 17, but does not contact with internal head cover 10.Thus, the inner space of vibration isolator core members 18 is separated into the medial compartment 31 and lateral compartments 32 that top communicates with each other by interior surrounding wall 4, as shown in Figure 2.
According to the present invention, be provided with the guide pillar 5 at the center of being in the bottom surface of internal head cover 10, it extends downwardly into medial compartment 31 from the bottom surface of internal head cover 10.For this reason, the external diameter of guide pillar 5 should be designed to the internal diameter being less than medial compartment 31.In the lower end of guide pillar 5, namely that one end place extended in medial compartment 31 be provided with interior permanent magnets 1.Like this, in the operation period of spring magnetic fluid isolation-base 100, guide pillar 5 is together with interior permanent magnets 1 meeting to-and-fro motion in medial compartment 31 along with vibration, and the magnetic field causing interior permanent magnets 1 to produce changes.
In addition, according to the present invention, in lateral compartments 32, the magnetorheological medium 2 of certain volume is filled with.Easy understand, the liquid level of magnetorheological medium 2 should, lower than the upper end of interior surrounding wall 4, make magnetorheological medium 2 exist only in lateral compartments 32 and not be present in medial compartment 31.Magnetorheological medium 2 is used as the resisting medium of spring magnetic fluid isolation-base 100.Suitably can select the type of magnetorheological medium 2, to meet the demand of application-specific.
Meanwhile, in lateral compartments 32, be provided with spring 3, be preferably a continuous print steel spring.Spring 3 provides vibration isolation rigidity for spring magnetic fluid isolation-base 100.By suitably selecting spring 3 to change this vibration isolation rigidity.Interior surrounding wall 4 can be used as the guiding mandrel of spring 3, and spring 3 can be sleeved on interior surrounding wall 4, and realizes guiding and location reliably by interior surrounding wall 4.For this reason, the external diameter of interior surrounding wall 4 should be arranged to the internal diameter of spring 3 suitable, and size is by related specifications setting.
When forming an overall vibration isolation system when spring magnetic fluid isolation-base according to the present invention 100 and vibration isolation object being installed together as machinery or track vehicle etc., the spring 3 of spring magnetic fluid isolation-base 100 can provide vibration isolation rigidity for spring magnetic fluid isolation-base, thus the frequency of okperation of the load natural frequency of entirety is reduced to away from vibration isolation object and excitation force.This realizes by selecting the design rigidity of spring 3.Therefore, when vibration isolation object causes vibration by imposed load or self-operating operating mode, vibration isolation object is under the stiffness tuning of spring magnetic fluid isolation-base 100, and the natural frequency of total system is adjusted to low frequency range.Therefore, the base frequency characteristic in low cycle can make whole system away from the medium-high frequency district of excitation force, thus effectively alleviates vibration.
In addition, for the exciting state of low frequency range close to system frequency, the vibration vibrating load of system and the vibration of vibration isolation object will be resonated, and amplitude can enlarge markedly.Now, the compressive deformation of the spring in spring magnetic fluid isolation-base increases.When the decrement of spring increases, the amount extend in medial compartment of guide pillar (permanent magnet together with disposed thereon) also increases, and magnetorheological medium is increased by the impact in magnetic field.In this case, the grain fraction of magnetorheological medium produces distribution again under the magnetic fields of permanent magnet, causes its shear yield strength to increase.Therefore, the frictional damping effect between spring 3 and magnetorheological medium 2 increases, thus achieves the further consumption of vibrational energy and weaken.
In addition, spring magnetic fluid isolation-base 100 is as subtracting vibration insulating foundation by vibration isolation object as machinery and ground are kept apart, and the value that the vibration making equipment run generation reaches environment can reduce.Carrier transfer rate under concrete operating mode is determined by the ratio of system damping ratio and exciting and system self-vibration natural frequency; Converse thought, is carried out the natural frequency of control system damping ratio and system, can realize vibration isolation target effect by the damping and rigidity controlling vibration isolator 100 in advance.
According to the present invention, when vibrating less, the decrement of spring is little, and the distance that guide pillar extend in medial compartment is also short.Thus, the magnetic intensity produced is also less, makes damping vibration attenuation function less.When vibrating larger, the compression quantitative change of spring is large, and the distance that guide pillar extend in medial compartment is also elongated.Thus, the magnetic intensity produced is also comparatively large, and damping vibration attenuation function is strengthened.
According to the present invention, by selecting the rigidity of spring, the length of guide pillar, the size of permanent magnet and setting, and the type of magnetorheological medium and liquid level, can the tuning performance of Regulation spring magnetic fluid isolation-base and damping ratio.
Such as, interior permanent magnets and external permanent magnets (will describe in detail hereinafter) are all arranged to dismountable.Thus can needs as the case may be and change magnetic field center and magnetic intensity, to realize best vibration isolation effect.
In a preferred embodiment, under reset condition, the liquid level of magnetorheological medium 2 should higher than the position residing for interior permanent magnets 1.Like this, after vibration produces, the to-and-fro motion of interior permanent magnets 1 in the region of magnetorheological medium 2 result in the notable change in magnetic field, thus causes the increase of shear yield strength or diminish, to realize the object of effective vibration isolation.
In one embodiment, cylindrical shell 15 is divided into two parts of separating, the upper cylinder 15B being namely fixed on the lower cylinder body 15A on support plate 17 and being fixed on internal head cover 10.Fastening piece 11 sealed type is utilized to connect by sheath 12 between lower cylinder body 15A and upper cylinder 15B.Sheath 12 is preferably flexible, can absorb vibration to a certain extent, and avoid cylindrical shell 15 to damage when bearing high vibration.
Fig. 3 shows a kind of configuration mode of permanent magnet.As shown in the figure, interior permanent magnets 1 comprises the inner permanent magnetic block 1A of the position that in some circumferences being arranged on guide pillar 5, uniform intervals is opened.Now, the inwall of cylindrical shell 15 correspondingly arranges some outside permanent magnets 14.Inner permanent magnetic block 1A and outside permanent magnets 14 are fitted to each other, and their N pole and S pole correspond to each other, thus the magnetic field of the magnetorheological medium 2 that has an impact.
Fig. 4 shows the another kind of configuration mode of permanent magnet.As shown in the figure, interior permanent magnets 1 is Tapered Cup, and is such as fixed on the lower end of guide pillar 5 by the baffle plate 25 at two ends and tightening nut 19.The interior permanent magnets 1 of taper is arranged to have along the direction of the upper end (left side namely in Fig. 4) from the lower end (right side namely in Fig. 4) of guide pillar 5 to guide pillar 5 diameter increased gradually.Therefore, the upper area of interior permanent magnets 1 has stronger magnetic field.When spring 3 is violent by load vibration, its depression depths is larger, thus enhances the magnetic intensity of magnetorheological medium region.Therefore, the damping energy dissipation of spring and magnetorheological medium also can correspondingly be strengthened, thus more effectively alleviates vibration.
Fig. 5 shows another configuration mode of permanent magnet.As shown in the figure, interior permanent magnets 1 comprises some ring parts 20, shows three ring parts 20 in the illustrated embodiment.Ring part 20 is arranged in guide pillar 5 in axial adjacent mode, and is such as fixed on the lower end of guide pillar 5 by the baffle plate 25 at two ends and tightening nut 19.Ring part 20 is arranged to have along the direction of the upper end (left side namely in Fig. 5) from the lower end (right side namely in Fig. 5) of guide pillar 5 to guide pillar 5 diameter increased gradually.Similar with shown in Fig. 4, the upper area of the interior permanent magnets 1 shown in Fig. 5 also has stronger magnetic field.When spring 3 is violent by load vibration, its depression depths is larger, thus enhances the magnetic intensity of magnetorheological medium region.Therefore, the damping energy dissipation of spring and magnetorheological medium also can correspondingly be strengthened, thus more effectively alleviates vibration.
Below with reference to Fig. 6 and 7, the two methods example according to spring magnetic fluid isolation-base 100 of the present invention is described.
Fig. 6 shows the subtract vibration isolation of spring magnetic fluid isolation-base 100 in the floating plate railway roadbed 22 of track traffic and applies.As shown in the figure, first when the construction cast of floating plate railway roadbed 22, the vibration isolator outer cylinder body 8 of spring magnetic fluid isolation-base 100 location is embedded between Framework Of Steel Reinforcement.Floating plate railway roadbed 22 complete shaping after, outside vibration isolator outer cylinder body 8, utilize hydraulic lifting machine (not shown) vibration isolator core members 18 to be headed into vibration isolator outer cylinder body 8.Vibration isolator core members 18 is placed on ground 40.
Preferably, for whole floating plate, need multiple spring magnetic fluid isolation-base 100 is installed.Each mounting point must meet following requirement: (1) spring lateral symmetry ground arranges each one, and railway roadbed extends to be arranged to by equidistant or other regular arrangements; (2) center of the global stiffness of the vibration damper after installing must keep on the same axis with by the center of gravity of device for vibration insutation; (3) center of rigidity on whole vibration damping basis is symmetrical arranged, and its position should near vertical stiffness biggest place.
Spring magnetic fluid isolation-base and floating plate ballast bed system can isolate the propagation of track vehicle as the vibration of the travelling loads such as high ferro, subway and city rail environment and building towards periphery effectively, protection important building and sensitivity building safety.Low noise environment can be provided for the life of resident and work simultaneously, ensure the physical and mental health of resident.
Fig. 7 shows the subtract vibration isolation of spring magnetic fluid isolation-base in Turbo-generator Set and applies.As shown in the figure, first, when the construction cast of the reinforced concrete pedestal 24 of Turbo-generator Set 23, the vibration isolator outer cylinder body 8 of spring magnetic fluid isolation-base 100 location is embedded between Framework Of Steel Reinforcement.Reinforced concrete pedestal 24 complete shaping after, outside vibration isolator outer cylinder body 8, utilize hydraulic lifting machine or other professional Lifting Equipment (not shown) vibration isolator core members 18 to be pushed into vibration isolator outer cylinder body 8.Vibration isolator core members 18 is placed on ground 40.Each mounting point must meet following requirement: (1) keeps the installation requirement of vibration isolator; (2) center of the global stiffness of the vibration isolator after installing must keep on the same axis with the center of gravity of Turbo-generator Set; (3) center of rigidity of whole vibration insulating foundation is symmetrical arranged, and its position should near vertical stiffness biggest place.
By spring magnetic fluid isolation-base is arranged on the coagulation pedestal bottom steam turbine set, the response fundamental frequency of whole system can be regulated, utilize the damping energy dissipation of vibration isolator, thus the balancing safety that can realize equipment runs, and also reduces the vibration & noise public hazards that equipment causes simultaneously simultaneously.
Although invention has been described with reference to some embodiments hereinbefore, but without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, various features in each embodiment disclosed by the present invention all to be combined with each other use by any-mode, and the description not carrying out exhaustive to the situation of these combinations is in this manual only for the consideration of omitting length and economize on resources.Therefore, the present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technological schemes fallen in the scope of claim.

Claims (9)

1. a spring magnetic fluid isolation-base, comprising:
Vibration isolator outer cylinder body, it has vibration isolator base plate and fixed base, and
Vibration isolator core members, it comprises the cylindrical shell that two ends are sealed respectively by cap assembly and bottom assembly, the upper end of described cylindrical shell coordinates the below being arranged on the fixed base of described vibration isolator outer cylinder body by cap assembly, and the lower end of described cylindrical shell is stretched out through the opening in described vibration isolator base plate, and contacted with surrounding environment by bottom assembly
Wherein, in described cylindrical shell, be provided with the inner annular wall at the center that is in be installed on bottom assembly, thus the space in cylindrical shell be separated into lateral compartments and medial compartment that top communicates with each other,
Described vibration isolator core members also comprises the interior permanent magnets be located in medial compartment, and the magnetorheological medium be located in lateral compartments and spring,
Wherein, described cap assembly is provided with the center guide pillar extended downwardly in described medial compartment, described interior permanent magnets is arranged in the region of below the liquid level being in described magnetorheological medium in described guide pillar.
2. spring magnetic fluid isolation-base according to claim 1, it is characterized in that, described spring housing is contained on inner annular wall.
3. spring magnetic fluid isolation-base according to claim 2, is characterized in that, described interior permanent magnets is be co-axially mounted on the Tapered Cup on described guide pillar, and the diameter of described Tapered Cup increases gradually along the direction from the lower end of described guide pillar to upper end.
4. spring magnetic fluid isolation-base according to claim 2, it is characterized in that, described interior permanent magnets comprises several and is co-axially mounted on ring part on guide pillar, and the pole strength of each ring part increases gradually along the direction from the lower end of described guide pillar to upper end.
5. spring magnetic fluid isolation-base according to claim 2, it is characterized in that, described interior permanent magnets comprises multiple inner permanent magnetic block that uniform intervals is opened in the circumference of described guide pillar, and on the inwall of described cylindrical shell, be provided with the outside permanent magnets corresponding with inner permanent magnetic block described in each.
6. the spring magnetic fluid isolation-base according to any one of claim 3-5, it is characterized in that, described cylindrical shell comprises the upper cylinder part be fixed on cap assembly, the lower cylinder body part be fixed on bottom assembly, and by flexible shroud connected for upper and lower shell portion.
7. the spring magnetic fluid isolation-base according to any one of claim 3-5, is characterized in that, described cap assembly comprises the internal head cover that sealed type direct with cylindrical shell contacts, and with the outer top cover of the mutual bearing engagement of fixed base.
8. the spring magnetic fluid isolation-base according to any one of claim 3-5, is characterized in that, the outer wall of described vibration isolator outer cylinder body is provided with adjutage, so that the installation of vibration isolator in vibration damping object.
9. the spring magnetic fluid isolation-base according to any one of claim 3-5, is characterized in that, described bottom assembly comprises support plate and is arranged on the vibration isolation coating on the bottom surface of support plate.
CN201210483496.3A 2012-11-23 2012-11-23 Base vibration isolation device with spring and magnetic fluid Active CN102943838B (en)

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