CN103256333B - Molecular spring vibration isolation buffering technology - Google Patents
Molecular spring vibration isolation buffering technology Download PDFInfo
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- CN103256333B CN103256333B CN201310180025.XA CN201310180025A CN103256333B CN 103256333 B CN103256333 B CN 103256333B CN 201310180025 A CN201310180025 A CN 201310180025A CN 103256333 B CN103256333 B CN 103256333B
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Abstract
The invention provides a brand-new vibration isolation buffering technology by utilizing the characteristics that water molecules can enter nanometer holes of dewatering zeolite particles when pressure is increased and automatically escape from the nanometer holes when the pressure is lowered, and certain energy is consumed in the process. A molecular spring is adopted as a work medium to design a vibration isolation buffering device. The vibration isolation buffering device comprises a hydraulic cylinder, an end cover, a fastening nut, a sleeve, a base, a thrust joint bearing, a rubber ring and a liquid and solid mixing medium formed by water and the zeolite particles. The hydraulic cylinder comprises a cylinder body, a piston, a foundation, a sealing bolt, a sealing ring and a sealing gasket. The molecular spring vibration isolation buffering device has subsection rigidity which comprises high bearing rigidity, low work rigidity and high limiting rigidity, and has the advantages of being strong in bearing capacity and low in inherent frequency of the work section, limiting automatically, possessing side rigidity, and being strong in survivability under severe environments, simple in structure and convenient to use and maintain. Moreover, vibration buffering performance of the device can be adjusted flexibly by adjusting effective piston sectional areas and the number of the zeolite particles.
Description
Technical field
The present invention relates to a kind of molecule spring vibration isolation buffer technology, nano science is applied to anti-vibration and shock field.
Background technique
Along with the development of science and technology, power and the rotating speed of machine improve constantly, and in modern project technology, vibration and impact have become very general problem.For the vibration and impact that control power equipment and mechanical device cause, passive vibration isolation technology is widely used because it is effectively simple, at present, passive vibration isolation technical field has achieved abundant achievement, as spring vibration-isolator, metallic rubber vibration isolator, rubber vibration isolator, steel-wire isolator, air cushion shock absorber etc., but these vibration isolators are not fully up to expectations in heavily loaded low frequency vibration isolation field, there is bearing capacity deficiency, vibration isolating effect can not satisfactory, parts easily aging, a series of problem such as volume is excessive, optional equipment is too complicated in the presence of a harsh environment.
In recent years, research finds that water molecule can enter in the nano-pore of hydrophobic zeolite under pressure and absorbs and storage of potential energy, the potential energy effect stored in unloading phase is due to water molecule and nano-pore of overflowing, large quantity of moisture turnover nano-pore completes storage and the release of energy in this process, and consume a small amount of energy, property class, like Hookean spring, is called a point sub-spring.The present invention utilizes point this characteristic of sub-spring, proposes to use a certain proportion of water and zeolite to form liquid-solid mixing medium as the medium providing elastic restoring force, has invented molecule spring vibration isolation buffer technology based on this.
Summary of the invention
The object of the invention is to provide molecule spring vibration isolation buffer technology, and with point sub-spring for working medium designs vibration isolation buffering device, this device has that load-bearing rigidity is high, work rigidity very low (thus natural frequency is low), automatic spacing, have lateral rigidity concurrently, structure is simple, working service is convenient, can regulate the feature of anti-vibration and shock performance easily; After special construction design, the present invention all can widely use in the vibration isolation field of jumbo and light equipment.
the present invention adopts following technological scheme:
A kind of molecule spring vibration isolation buffer technology of the present invention, utilizes water molecule to enter the nano-pore of hydrophobic zeolite particle when pressure increases, nano-pore of automatically overflowing when pressure reduces, and in the feature of the certain energy of this process consumption, realizes anti-vibration and shock.Molecule spring vibration isolation damping device used comprises end cap, pedestal, sleeve, rubber ring; Described pedestal arranges sleeve, arranges end cap in sleeve, between end cap and sleeve, arrange rubber ring; Also comprise cylinder body, piston, base; Described base is arranged in the sleeve below end cap, arranges rubber ring between base and sleeve, and cylinder body is arranged in base upper end, and end cap is nested with in cylinder body upper end, and arrange piston in cylinder body, piston extends cylinder body and is fixedly connected with the interior edge face on end cap top; Filling liquid solid mixing medium in cylinder body.
A kind of molecule spring vibration isolation buffer technology of the present invention, molecule spring vibration isolation damping device piston used and end cap are fixed by tightening nut.
A kind of molecule spring vibration isolation buffer technology of the present invention, sliding connection between the end cap of molecule spring vibration isolation damping device used and cylinder body.
A kind of molecule spring vibration isolation buffer technology of the present invention, the piston of molecule spring vibration isolation damping device used comprises thick section and thin segment, and described thick section is cock body, and cock body is provided with through hole and coordinates with cylinder gap; Thin segment extends for carrying section and to be slidably matched between cylinder body and cylinder body and to seal.
A kind of molecule spring vibration isolation buffer technology of the present invention, offer groove in the base of molecule spring vibration isolation damping device used, cylinder body is arranged in groove, and cylinder body is connected with base by thread; Gasket seal is arranged between cylinder body and base; Base groove section in cylinder body arranges exhaust port, and exhaust port is sealed by sealing bolt.
A kind of molecule spring vibration isolation buffer technology of the present invention, molecule spring vibration isolation damping device used also comprises thrust articulated bearing; The bottom of described cylinder body is provided with the polished rod of protrusion, and the bottom of polished rod connects thrust articulated bearing, and thrust articulated bearing is arranged on pedestal.
A kind of molecule spring vibration isolation buffer technology of the present invention, described liquid-solid mixing medium is water and zeolite granular composition; Zeolite granular is hydrophobic zeolite, and hydrophobic zeolite is the mixture of [Microsoft user 1] MFI type zeolite silicalite-1 or DDR zeolite decadodecasil 3R or AFI type zeolite SSZ-24 or MTW type zeolite ZSM-12 or TON type zeolite ZSM-22 or pure silicon chabasite Si-CHA or above-mentioned zeolite.
A kind of molecule spring vibration isolation buffer technology of the present invention, described water is distilled water.
beneficial effect
The invention provides a kind of molecule spring vibration isolation buffer technology, and propose molecule spring vibration isolation damping device accordingly, this molecule spring vibration isolation damping device has the feature of high bearing capacity, low work rigidity, has lateral rigidity concurrently, is applicable to the vibration isolation requirement of heavy duty equipment.
The work rigidity of molecule spring vibration isolation damping device can be changed by the quantity increasing and decreasing zeolite granular.
Zeolite granular has high porosity, fills the amount of deformation that a small amount of liquid-solid mixing medium can meet vibration isolation demand, while saving material, molecule spring vibration isolation damping device can be accomplished very little.
The phase III rigidity of molecule spring vibration isolation damping device is very large, plays from position-limiting action, effectively can avoid the problem causing structural damage because displacement is excessive.
Pressure needed for active section is reached in order to make liquid-solid mixing medium internal pressure, by changing the thickness of piston rod active section, change its effective active area thus change bearing capacity, molecule spring vibration isolation damping device all can be worked under various load under work rigidity, play low frequency vibration isolation effect.Like this, the present invention is with a wide range of applications too in light equipment vibration isolation.
Because water and zeolite are in closed cavity, can work in the presence of a harsh environment for a long time, cause the problem of hydraulic performance decline without material aging and corrosion.Structure of the present invention is simple, be convenient to safeguard, can change mixed medium easily when needing.
In addition, molecule spring vibration isolation damping device has lateral rigidity, can bear certain lateral load.
Accompanying drawing explanation
Fig. 1 is molecule spring vibration isolation buffer unit structure schematic diagram.
Fig. 2 is molecule spring vibration isolation damping device cylinder body side view.
Fig. 3 is molecule spring vibration isolation damping device base vertical view.
The schematic diagram that Fig. 4 is the pressure force-displacement curve of water and zeolite liquid-solid mixing medium in the present invention and partial enlarged drawing thereof, water enters nano-pore under ambient pressure effect.
Fig. 5 is zeolite is silicalite-1, and useful area is 3.14cm2, and the packing volume of water is under 20ml condition, the exemplary relationship of the pressure force-displacement curve of molecule spring vibration isolation damping device of the present invention and the loading of zeolite granular.
Fig. 6 is zeolite is silicalite-1, and the packing volume of water is 10ml, and the loading of zeolite granular is under 10g condition, the pressure force-displacement curve of molecule spring vibration isolation damping device of the present invention and the exemplary relationship of useful area.
In figure, 1 is end cap, and 2 is cylinder bodies, and 3 is pistons, and 4 is bases, and 5 is sealing bolts, and 6 is hydrophobic zeolites, and 7 is water, and 8 is seal rings, and 9 is gasket seals, and 10 is tightening nuts, and 11 is thrust articulated bearings, and 12 is pedestals, and 13 is sleeves, and 14 is rubber rings,
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in more detail:
The present invention utilizes water molecule can enter the nano-pore of hydrophobic zeolite particle when pressure increases, and the feature of nano-pore of can automatically overflowing when pressure reduces, proposes a kind of brand-new vibration isolation technique.Divide sub-spring by water and the granule sealed mixed medium that obtains in hydraulic container of hydrophobic zeolite, utilize water molecule under high pressure to circulate the transformation of energy of the hydrophobic capillary tube of nanometer in zeolite and loss characteristic, realize protecting the anti-vibration and shock of equipment; Sub-spring is divided to can be used for vibration isolation, vibration damping and buffering; Because water molecule is different in the complexity of different pressures stage turnover nano-pore, divide sub-spring to present the characteristic of high-mechanic rigidity, low dynamic rate and the spacing rigidity of height, thus make molecule spring vibration isolation damping device possess the ideal performance of extremely low natural frequency and little quiet distortion simultaneously.
As shown in the figure: the liquid-solid mixing medium of water and zeolite granular composition is sealed in oil hydraulic cylinder, undertaken pressurizeing by piston and unload.This liquid-solid mixing medium under pressure action effect divides three phases: the first stage is called carrying section, pressure increases under normal pressure, water molecule enters in the nano-pore of zeolite hardly, now the compressibility of liquid makes this mixed medium volume slightly reduce along with pressure increases, molecule spring vibration isolation damping device shows high rigidity, is called load-bearing rigidity; Second stage is called active section, the pressurization of first stage makes hydraulic pressure acquire a certain degree, and (pressure needed for different zeolites is different, be generally tens MPas to MPa up to a hundred), continue pressurization, now water molecule starts to enter in the nano-pore of zeolite in a large number, this mixed medium volume of this stage reduces rapidly along with pressure increases, and molecule spring vibration isolation damping device shows Low rigidity, is called work rigidity; Along with water molecule is full of the nano-pore of zeolite, compression process enters the phase III, is called spacing section, and this stage does not have water molecule to enter nano-pore, and the compressibility of liquid makes this molecule spring vibration isolation damping device show as high rigidity, is called spacing rigidity; Uninstall process is the inverse process of loading procedure.
In pore, liquid-solid boundary contact has Laplace-Washburn equation, and the process that water under high pressure enters the nano-pore of hydrophobic zeolite meets this equation:
In formula,
for water molecule enters the pressure in dewatering nano hole,
for the surface tension of water,
for liquid-solid boundary wrapping angle, for water and hydrophobic interfaces, this angle is greater than 90 °,
for nano-pore radius.Formula is visible thus, and the pressure that water enters dewatering nano hole increases along with the reduction of nano-pore radius.Because the nano-pore of zeolite granular is uneven, therefore in pressure process, water molecule takes the lead in filling larger nano-pore hole, and along with pressure increases, fill less hole gradually, final all holes are all full of by water, therefore produce rigidity at active section; For same zeolite granular, its pore-size closely, so between different aperture
difference is very little, and enters nano-pore in a large number along with water molecule, and liquid-solid mixing medium Volume Changes is very large, and therefore active section presents Low rigidity characteristic.
Vibration isolation buffering device of the present invention in use, pressurizeed to liquid-solid mixing medium by piston by load (generally by the quality of device for vibration insutation).Molecule spring vibration isolation damping device is suitable for load quality
;
In formula
for water molecule enters the pressure in dewatering nano hole; Subscript
for water starts the nano-pore stage entering zeolite, subscript
for water is full of the nano-pore stage,
for the effective active area of piston compression,
for gravity accleration.
Under applicable load quality effect, the pressure in this mixed medium is in active section, and now molecule spring vibration isolation damping device rigidity is very low, reaches optimum vibration isolating effect.
Water of the present invention and zeolite mixed medium, water starts the pressure of the nano-pore entering zeolite
different because zeolite type is different, be tens of MPa MPa even up to a hundred, water is full of the pressure of the nano-pore of zeolite
slightly larger than
, active section pressure is
, therefore molecule spring vibration isolation damping device carrying quality is hundreds of Kg/cm
2to thousands of Kg/cm
2, namely every square centimeter of piston effective active area can carry hundreds of even thousands of kilograms, shows high bearing capacity.At active section, make molecule spring vibration isolation damping device show very low rigidity because water molecule passes in and out nano-pore in a large number, thus make vibrating isolation system have very low natural frequency.
For same zeolite,
with
be definite value, along with the increase of zeolite granular quantity, water molecule is under high pressure filled in the process of nano-pore, and the volume of water and zeolite mixed medium reduces more rapidly, and therefore the rigidity of molecule spring vibration isolation damping device reduces.According to this feature, can the work rigidity of Molecular regulator spring vibration isolation damping device easily, no matter load quality size, vibrating isolation system can be made to have extremely low frequency of okperation.
To fill silicalite-1 zeolite granular, provide the performance of liquid-solid mixing medium molecule spring vibration isolation damping device and piston rod useful area and the relation of filling between zeolite quality as following table:
Table a part spring vibration isolation damping device anti-vibration and shock performance and zeolite filling quality exemplary relationship;
Table two molecule spring vibration isolation damping device anti-vibration and shock performance and piston effective area exemplary relationship:
Below in conjunction with molecule spring vibration isolation buffer unit structure schematic diagram, the present invention is described in more detail:
As shown in Figure 1, molecule spring vibration isolation damping device, comprises the liquid-solid mixing medium of oil hydraulic cylinder, end cap 1, tightening nut 10, sleeve 13, pedestal 12, thrust articulated bearing 11, rubber ring 14 and water 7 and zeolite granular 6 composition.Described oil hydraulic cylinder comprises cylinder body 2, piston 3, base 4, sealing bolt 5, seal ring 8 and gasket seal 9.End cap 1 is made a call to one week screw, can fixed transfer part, facilitate bearing load or be connected with by device for vibration insutation; End cap 1 and piston 3 are with being threaded, and end cap 1 and cylinder body 2 are slidably matched blow-by, provide axial stability; Piston 3 cock body gets through hole, with cylinder body 2 Spielpassung, makes piston 3 axially more stable, is slidably matched, and is sealed by seal ring 8 between carrying section and cylinder body 2; Cylinder body 2 is threaded with base 4, between have gasket seal 9, fitted seal, still can ensure good sealing property through for several times dismounting, conveniently to install and cleaning; Cylinder body 2 is with the convex joint of Hexagon as shown in Figure 4, and as shown in Figure 5, base 4 profile is Hexagon, conveniently tightens; Begin to rehearse bottom base 4 pore, for the bubble in exudate solid mixing medium, can add diminishing 7 or zeolite granular 6 simultaneously, sealed during work with countersunk head sealing bolt 5 by exhaust port.The liquid-solid mixing medium that water 7 and zeolite granular 6 form is sealed in oil hydraulic cylinder, is undertaken pressurizeing and unload by piston 3.Base 4 is connected with thrust articulated bearing 11, and thrust articulated bearing 11 is welded on pedestal 12; Oil hydraulic cylinder is placed in the exocoel that pedestal 12 and sleeve 13 form, end cap 1 external stability rubber ring 14, and leaves gap between sleeve 13, does not affect end cap 1 axial motion, filled rubber circle 14 between base 4 and sleeve 13 when only having thrust load; When molecule spring vibration isolation damping device is subject to lateral load, rubber ring 14 provides lateral rigidity.Be threaded connection between pedestal 12 and sleeve 13, pedestal 12 made a call to a ring through hole, can connection adapter piece or be fixed on basis.
This molecule spring vibration isolation damping device has the feature of high bearing capacity, low work rigidity, has lateral rigidity concurrently.Piston 3 section of carrying sectional area is piston effective active area, changes the effective active area of piston 3, to meet unequally loaded vibration isolation requirement by changing piston 3 section of carrying diameter.The work rigidity of molecule spring vibration isolation damping device can be changed by the quantity increasing and decreasing zeolite granular.
Claims (3)
1. a molecule spring vibration-isolator, point sub-spring mixture formed with water and hydrophobic zeolite particle is for working medium, utilize water molecule under high pressure to pass in and out the hydrophobic capillary tube of nanometer in zeolite and realize energy storage and release and the principle only consuming a small amount of energy, realize protecting the vibration isolation of equipment, it is characterized in that: molecule springing is applied to vibration isolation field, with point sub-spring for working medium designs molecule spring vibration-isolator, this vibration isolator has high Static stiffness concurrently, the segmentation stiffness characteristics of low dynamic stiffness and the spacing rigidity of height, possesses the mechanical property of low natural frequency and small quiet distortion, described molecule spring vibration-isolator, comprise end cap (1), pedestal (12), sleeve (13), described pedestal (12) arranges sleeve (13), end cap (1) is arranged in sleeve (13), also comprise cylinder body (2), piston (3), base (4), described base (4) is arranged in the sleeve (13) of end cap (1) below, and cylinder body (2) is arranged in base (4) upper end, cylinder body (2), piston (3), base (4) composition oil hydraulic cylinder, end cap (1) is nested with in cylinder body (2) upper end, be slidably matched between end cap (1) and cylinder body (2) blow-by, piston (3) is arranged in cylinder body (2), piston (3) extends cylinder body (2) and is fixedly connected with the interior edge face on end cap (1) top, fills a point sub-spring liquid-solid mixing medium in cylinder body (2), also comprise thrust articulated bearing (11) and rubber ring (14), the bottom of described base (4) is provided with the polished rod of protrusion, and the bottom of polished rod connects thrust articulated bearing (11), and thrust articulated bearing (11) is arranged on pedestal (12), arrange rubber ring (14) between end cap (1) and sleeve (13), leave gap between rubber ring (14) and sleeve (13) herein, rubber ring (14) is arranged, herein the Contact of rubber ring (14) and sleeve (13) between base (4) and sleeve (13).
2. molecule spring vibration-isolator according to claim 1, is characterized in that: described piston (3) comprises thick section and thin segment, and described thick section is cock body, and cock body is provided with through hole and coordinates with cylinder gap; Thin segment extends and to be slidably matched between cylinder body (2) and cylinder body (2) and to seal.
3. molecule spring vibration-isolator according to claim 1, offer groove in described base (4), cylinder body (2) is arranged in groove, and cylinder body (2) and base (4) are threaded connection; Gasket seal (9) is arranged between cylinder body (2) and base (4), it is characterized in that: base (4) the groove section in cylinder body (2) arranges exhaust port, exhaust port except for exudate pressure gas in the jar, also for adding, diminishing and zeolite granular, exhaust port is by sealing bolt (5) sealing.
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| CN104787717B (en) * | 2014-01-20 | 2016-03-23 | 中国科学院金属研究所 | A kind of nanoporous driver based on liquid driven and application thereof |
| CN103899702B (en) * | 2014-04-08 | 2015-09-02 | 陕西煤业化工技术研究院有限责任公司 | A kind of nano-porous materials endergonic structure based on Metal Packaging |
| WO2017016405A1 (en) * | 2015-07-24 | 2017-02-02 | 陈前 | Molecular spring vibration isolation buffer |
| CN112963487A (en) * | 2021-01-22 | 2021-06-15 | 中国人民解放军92578部队 | Piston type molecular spring vibration isolator |
| CN114562535B (en) * | 2022-03-01 | 2024-03-01 | 浙江创特新材科技有限公司 | Air damper system |
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| CN2667239Y (en) * | 2004-01-13 | 2004-12-29 | 北京理工大学 | Metal shell type current variable vibration isolator |
| CN101363494A (en) * | 2008-09-19 | 2009-02-11 | 南京航空航天大学 | Liquid-solid mixing medium vibration isolator |
| CN102518727A (en) * | 2011-12-20 | 2012-06-27 | 中国飞机强度研究所 | Totally-closed rigidity adjustable type vibration isolator |
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| JP2001219799A (en) * | 2000-02-09 | 2001-08-14 | Kunio Nakajima | Shock absorber |
| JP4569092B2 (en) * | 2003-10-15 | 2010-10-27 | 卓三 岩壷 | Colloidal damper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2667239Y (en) * | 2004-01-13 | 2004-12-29 | 北京理工大学 | Metal shell type current variable vibration isolator |
| CN101363494A (en) * | 2008-09-19 | 2009-02-11 | 南京航空航天大学 | Liquid-solid mixing medium vibration isolator |
| CN102518727A (en) * | 2011-12-20 | 2012-06-27 | 中国飞机强度研究所 | Totally-closed rigidity adjustable type vibration isolator |
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Inventor after: Yu Muchun Inventor after: Chen Qian Inventor after: Gao Xue Inventor before: Chen Qian Inventor before: Yu Muchun Inventor before: Gao Xue |
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Effective date of registration: 20170720 Address after: Yudaojie Nanjing 210018 Jiangsu province No. 29 Patentee after: Chen Qian Address before: Yudaojie Nanjing 210018 Jiangsu province No. 29 Patentee before: Nanjing University of Aeronautics and Astronautics |