CN104847826A - Inner taper angle magnetic liquid damping shock absorber - Google Patents
Inner taper angle magnetic liquid damping shock absorber Download PDFInfo
- Publication number
- CN104847826A CN104847826A CN201510173925.0A CN201510173925A CN104847826A CN 104847826 A CN104847826 A CN 104847826A CN 201510173925 A CN201510173925 A CN 201510173925A CN 104847826 A CN104847826 A CN 104847826A
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- permanent magnet
- housing
- magnetic liquid
- vent
- taper hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
- F16F6/005—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid using permanent magnets only
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an inner taper angle magnetic liquid damping shock absorber and belongs to the field of mechanical engineering vibration. The inner taper angle magnetic liquid damping shock absorber successively solves the problem that due to multiple structure problems, an existing magnetic liquid damping shock absorber cannot be applied in the engineering practice. The inner taper angle magnetic liquid damping shock absorber comprises a shell (1), magnetic liquid (2), a left permanent magnet (3), a connecting rod (4), a right permanent magnet (5), a right end cover (6), a ventilation groove (7) and a left end cover (8). When external vibration exists, the magnetic liquid moves along with mass blocks composed of the left permanent magnet (3) and the right permanent magnet (5) so as to absorb energy, a frequency difference is formed between the mass blocks through the left permanent magnet (3), the connecting rod (4) and the right permanent magnet (5) under the action of a taper angle, and the shock absorbing efficiency can be the maximum.
Description
Technical field
The present invention relates to a kind of interior cone angle magnetic fluid damper, be applicable to the vibration damping of long straight object in astrovehicle.
Background technique
Magnetic fluid damper is a kind of passive damper, higher to the susceptibility of inertial force, the advantage such as have that structure is simple, volume is little, power consumption is large and the life-span is long.Due to the running environment that spacecraft is special, himself volume, weight and the energy are subject to certain restrictions, therefore magnetic fluid damper is very suitable for the Large Spacecraft long low frequency of straight object, the vibration damping of little amplitude, as the solar energy sailboard, antenna etc. of space station, simultaneously, it also has broad application prospects on the ground, as reached the vibration damping of high powered antenna of hundred meters, vibration damping of precision balance etc.But existing magnetic fluid damper cannot be applied due to various structures problem in engineering reality, particular problem is as follows:
Magnetic fluid damper the most common mainly adopts the second order law of buoyancy of magnetic liquid now, as as described in documents 1 (publication number CN102032304A applies for a patent), described in documents 2 (publication number CN104074903A applies for a patent), described in documents 3 (publication number CN102042359A applies for a patent), described in documents 4 (publication number CN102494070A), with documents 6 (publication number CN103122965A) described in documents 5 (publication number JP11-230255A), minority have employed the single order law of buoyancy of magnetic liquid, as as described in documents 7 (publication number JP11-223247A applies for a patent).
Damper means described in documents 1 (what publication number was CN102032304A applies for a patent), this vibration damper comprises non-magnetic shell, magnetic liquid, permanent magnet, nut, end cap, bolt, screw, sealing gasket and O RunddichtringO.This application patent by using columniform permanent magnet as mass block, in non-magnetic shell, fill magnetic liquid, thus utilize the second order law of buoyancy of magnetic liquid make mass block suspend in the housing.When extraneous vibration, the relative movement between mass block and housing causes in the gap of magnetic liquid between mass block and housing flows, thus produces viscous loss.Vibration damper described in this patent make use of the second order law of buoyancy of magnetic liquid; by be full of in housing magnetic liquid make permanent magnet can stable suspersion in the housing; but glue effect due to the magnetic of magnetic liquid; after magnetic liquid is full of housing; permanent magnet will slowly in enclosure interior motion, and effectiveness in vibration suppression is bad.Secondly, because mass block is permanent magnet, housing is common cylinder tubbiness, therefore mass block weight and restoring force size all non-adjustable, therefore in engineer applied, not there is practicability.
Damper means described in documents 2 (what publication number was CN104074903A applies for a patent), this vibration damper comprises non-magnetic housing, bolt, nut, permanent magnet, magnetic liquid, non-magnetic shell, O type circle, pore, annular space etc.This application patent is also as mass block using permanent magnet, a small amount of magnetic liquid is adsorbed at permanent magnet two ends, utilize the second order law of buoyancy of magnetic liquid that permanent magnet is suspended, make magnetic liquid produce elastic force by inner walls being processed into arc-shaped, thus make permanent magnet be in the center of housing all the time.Meanwhile, this structure does not need magnetic liquid to be full of whole housing yet, thus the magnetic liquid avoiding documents 1 be full of after flow difficulties problem at permanent magnet two ends.But when mass block moves, to deflection be there is in whole mass block, cause mass block bottom surface and housing arc inner wall generation scratch phenomenon, cause effectiveness in vibration suppression not obvious, this patent pore used needs peace to connect overcoat simultaneously, complex structure, causes whole vibration damper quality to increase, does not therefore have practicability.
Damper means described in documents 3 (what publication number was CN102042359A applies for a patent), this vibration damper and the apparatus structure described in documents 1 similar, but documents 3 is processed with 4 ~ 8 through holes on permanent magnet, it is more smooth and easy that this through hole can make magnetic liquid flow, and increase friction area.But, because magnetic liquid is full of whole chamber, and magnetic field, permanent magnet two ends is very strong, that magnetic liquid in through hole or the magnetic liquid between permanent magnet and housing all can cannot proper flow because viscosity is excessive, therefore on permanent magnet, process the effect of through hole and not obvious, therefore not there is practicability.
Damper means described in documents 4 (publication number CN102494070A applies for a patent), described in this vibration damper principle and documents 1, principle of device is similar, but described in this patent, housing is processed conglobate hollow ball-shape by device, and permanent magnet is processed into solid spherical.But simple alteration of form can not solve the problem of magnetic liquid flow difficulties between permanent magnet and housing, does not therefore have practicability.
Vibration damper described in documents 5 (publication number JP11-230255A applies for a patent), this vibration damper is a kind of vibration damper for shaft vibration, and it utilizes the second order law of buoyancy of magnetic liquid, using permanent magnet as a gyrating mass block.This patent also cannot solve the problem of magnetic liquid flow difficulties between permanent magnet and housing, does not therefore have practicability.
Damper means described in documents 6 (publication number CN103122965A applies for a patent), this vibration damper is a kind of vibration damper for cutting down solar energy sailboard vibration, it makes use of the second order law of buoyancy of magnetic liquid, mass block is annular permanent magnet.This patent is by keeping the middle position of permanent magnet with the pad of band cone angle, but when cylindrical permanent magnet is moved at housing bottom, because run-off the straight causes permanent magnet and pad to scratch by the effect of cone angle pad, viscosity power consumption reduces, and therefore there is some problems in actual applications.
Damper means described in documents 7 (publication number JP11-223247A applies for a patent), this vibration damper is a kind of vibration damper for cutting down shaft vibration, it makes use of the single order law of buoyancy of magnetic liquid, mass block is annular no permeable material, rotating shaft is installed a circle permanent magnet mass block is not offset in circumference.But known by the single order law of buoyancy of magnetic liquid, it is unstable that independent one group of permanent magnet suspends to the material of non-magnetic, be easy to cause mass block producing skew and disturbance along rotating shaft axial direction, therefore this patent does not have use value.
Therefore be badly in need of redesigning the structure of magnetic fluid damper and improving, can be applied in Practical Project.
Summary of the invention
Technical problem to be solved by this invention is, existing magnetic fluid damper causes the problems such as magnetic liquid flowing due to various structures defect, makes it cannot be applied in engineering reality.Spy provides a kind of interior cone angle magnetic fluid damper.
The technological scheme that technical solution problem of the present invention adopts is:
Cone angle magnetic fluid damper in a kind of, this device comprises housing, magnetic liquid, left permanent magnet, pitman, right permanent magnet, right end cap, right vent, left end cap, left vent.
Described housing is provided with endoporus, and endoporus left end is the from left to right taper hole that reduces gradually of diameter, and endoporus right-hand member is the taper hole that reduces gradually of diameter from right to left; Described left permanent magnet, pitman and right permanent magnet are from left to right fixedly connected sequentially and form working cell, and ensure coaxial; Left permanent magnet and right permanent magnet inject a certain amount of magnetic liquid; Described left end cap and right end cap respectively end face left and right with housing are fixedly connected with.The symmetrical taper holes that portion is formed in the housing effectively can prevent the scratch problem between permanent magnet and housing.
Described housing is non-permeable material, the cone angle 5 °≤θ <90 ° of its endoporus left and right two ends taper hole.The taper hole at the left and right two ends of housing provides a certralizing ability can to the mass block formed by left permanent magnet, pitman and right permanent magnet, makes mass block in vibration processes, be subject to the centering power of a sensing symmetry center all the time.
Described left vent is identical with size with right vent shapes, for hole circle shape, and the area of left vent is more than or equal to the face area of left permanent magnet, be less than the maximum area of housing taper hole, the area of right vent is more than or equal to the face area of right permanent magnet, is less than the maximum area of housing taper hole.Left and right vent can guarantee that chamber both sides gas can not be compressed due to the motion of mass block, and its dimensional range can guarantee that the fluctuation of two ends gas pressure intensity reaches minimum, affects the movement velocity of mass block.
Described left permanent magnet is identical with right magnet size, and diameter is all greater than the minimum diameter of housing taper hole, is less than the maximum diameter of housing taper hole; Described pitman diameter is less than the diameter of left and right permanent magnet, and is less than the minimum diameter of housing taper hole, and material can select the materials such as magnetic conduction, non-magnetic or permanent magnet.The size of left and right permanent magnet can prevent due to effect of inertia, and left and right permanent magnet and each self-corresponding housing cone angle position depart from, and cause centering power to lose efficacy.Pitman can select the material of on-deformable any material, and when too aerial applications, the magnetic conductive material that preferred density is larger or non-permeable material, as iron, copper or lead etc.; When Ground Application, the non-permeable material that preferred density is less, as aluminium, also can select permanent magnet.The diameter connecting side is less than taper hole minimum diameter, also prevent the scratch problem with shell wall side.
The present invention compares had beneficial effect with prior art as follows: the taper hole at the left and right two ends of (1) housing provides a certralizing ability can to the mass block formed by left permanent magnet, pitman and right permanent magnet, make mass block in vibration processes, be subject to the centering power of a sensing symmetry center all the time, and the taper hole that diameter reduces gradually from left and right two ends to centre can prevent the inclination mass block movement process and the scratch problem with shell wall side; (2) left vent and right vent can guarantee that chamber both sides gas can not be compressed, and produce fluctuation of pressure, thus can not affect the movement velocity of left and right permanent magnet; (3) size of left and right permanent magnet can prevent due to effect of inertia, and left and right permanent magnet and each self-corresponding housing cone angle position depart from, and cause centering power to lose efficacy; (4) pitman makes the quality of inertial mass environmentally to require to select, and expands the using scope of vibration damper, and simultaneously its size prevents mass block and housing directly to scratch problem.
Accompanying drawing explanation
Cone angle magnetic fluid damper in Fig. 1 one;
In Fig. 1: housing 1, magnetic liquid 2, left permanent magnet 3, pitman 4, right permanent magnet 5, right end cap 6, right vent 7, left end cap 8, left vent 9.
Embodiment
Be that the invention will be further described for embodiment with accompanying drawing:
Cone angle magnetic fluid damper in a kind of, as Fig. 1, this vibration damping equipment comprises: housing 1, magnetic liquid 2, left permanent magnet 3, pitman 4, right permanent magnet 5, right end cap 6, right vent 7, left end cap 8, left vent 9.
Connection between each several part forming this device:
First be fixedly connected with pitman 4 by described left permanent magnet 3, and ensure coaxial, Placement is bonding way.Left permanent magnet 3 injects enough magnetic liquids 2.Then the above-mentioned connecting body formed by left permanent magnet 3 and pitman 4 is loaded in housing 1 from left to right.Again right permanent magnet 5 is fixedly connected to form working cell with above-mentioned connecting body, and magnetic liquid 2 is injected on right permanent magnet 5.Last described left end cap 8 and right end cap 6 are fixedly connected with the left and right end face of housing 1 respectively, Placement be bonding, weld or be threaded.
Described housing 1 and left and right end cap all select non-permeable material.
Described pitman 4 may be used for the weight of allocating whole mass block, and magnetic conductive material can be selected also can to select non-permeable material, can be even permanent magnet.
Claims (5)
1. a cone angle magnetic fluid damper in, is characterized in that: housing (1), magnetic liquid (2), left permanent magnet (3), pitman (4), right permanent magnet (5), right end cap (6), right vent (7), left end cap (8), left vent (9); Described housing (1) is provided with endoporus, and endoporus left end is the from left to right taper hole that reduces gradually of diameter, and endoporus right-hand member is the taper hole that reduces gradually of diameter from right to left; Described left permanent magnet (3), pitman (4) and right permanent magnet (5) are from left to right fixedly connected sequentially and form working cell, and ensure coaxial; At left permanent magnet (3) and right permanent magnet (5) a certain amount of magnetic liquid of upper injection (2); Described left end cap (8) is fixedly connected with housing (1) left and right end face respectively with right end cap (6); Left end cap (8) is processed with left vent (9), right end cap (6) is processed with right vent (7).
2. cone angle magnetic fluid damper in one according to claim 1, is characterized in that:
Described housing (1) is non-permeable material, the cone angle 5 °≤θ <90 ° of its endoporus left and right two ends taper hole.
3. cone angle magnetic fluid damper in one according to claim 1 and 2, is characterized in that:
Described left vent (9) is identical with right vent (7) shape and size, for hole circle shape, and the area of left vent (9) is more than or equal to the face area of left permanent magnet (3), be less than the maximum area of housing (1) taper hole, the area of right vent (7) is more than or equal to the face area of right permanent magnet (5), is less than the maximum area of housing (1) taper hole.
4. cone angle magnetic fluid damper in one according to claim 1, is characterized in that:
Described left permanent magnet (3) and right permanent magnet (5) measure-alike, and diameter is all greater than the minimum diameter of housing (1) taper hole, is less than the maximum diameter of housing (1) taper hole.
5. cone angle magnetic fluid damper in the one according to claim 1 or 2 or 4, is characterized in that:
Described pitman (4) diameter is less than the diameter of left and right permanent magnet, and is less than the minimum diameter of housing (1) taper hole, and material can select the materials such as magnetic conduction, non-magnetic or permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510173925.0A CN104847826B (en) | 2015-04-14 | 2015-04-14 | Cone angle magnetic fluid damper in a kind of |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510173925.0A CN104847826B (en) | 2015-04-14 | 2015-04-14 | Cone angle magnetic fluid damper in a kind of |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104847826A true CN104847826A (en) | 2015-08-19 |
| CN104847826B CN104847826B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510173925.0A Expired - Fee Related CN104847826B (en) | 2015-04-14 | 2015-04-14 | Cone angle magnetic fluid damper in a kind of |
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| CN (1) | CN104847826B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643820A (en) * | 2016-12-30 | 2017-05-10 | 北京交通大学 | Inner cone angle magnetic liquid inertia sensor for rectangular permanent magnet |
| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
| CN112196928A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Drawer type magnetic liquid damping vibration absorber |
| CN112196926A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN113708592A (en) * | 2021-08-19 | 2021-11-26 | 中国科学院宁波材料技术与工程研究所 | Permanent-magnet self-suspension type magnetic liquid kinetic energy collector |
| CN114439875A (en) * | 2022-01-14 | 2022-05-06 | 清华大学 | Electric eddy current magnetic liquid damping shock absorber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11223247A (en) * | 1998-02-04 | 1999-08-17 | Nok Corp | Torsional damper |
| CN102032304A (en) * | 2010-12-29 | 2011-04-27 | 北京交通大学 | Magnetic fluid damping device |
| CN102213285A (en) * | 2011-06-14 | 2011-10-12 | 北京交通大学 | Magnetic liquid damping vibration attenuation device |
| JP5178763B2 (en) * | 2010-03-26 | 2013-04-10 | 株式会社東芝 | Magnetic multiple motion vibration absorber |
| CN103122965A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damping vibration attenuating device |
| CN104074903A (en) * | 2014-06-30 | 2014-10-01 | 北京交通大学 | Magnetic liquid damping shock absorber with arc-shaped inner wall axial section |
-
2015
- 2015-04-14 CN CN201510173925.0A patent/CN104847826B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11223247A (en) * | 1998-02-04 | 1999-08-17 | Nok Corp | Torsional damper |
| JP5178763B2 (en) * | 2010-03-26 | 2013-04-10 | 株式会社東芝 | Magnetic multiple motion vibration absorber |
| CN102032304A (en) * | 2010-12-29 | 2011-04-27 | 北京交通大学 | Magnetic fluid damping device |
| CN102213285A (en) * | 2011-06-14 | 2011-10-12 | 北京交通大学 | Magnetic liquid damping vibration attenuation device |
| CN103122965A (en) * | 2013-02-08 | 2013-05-29 | 北京交通大学 | Magnetic liquid damping vibration attenuating device |
| CN104074903A (en) * | 2014-06-30 | 2014-10-01 | 北京交通大学 | Magnetic liquid damping shock absorber with arc-shaped inner wall axial section |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643820A (en) * | 2016-12-30 | 2017-05-10 | 北京交通大学 | Inner cone angle magnetic liquid inertia sensor for rectangular permanent magnet |
| CN112196923A (en) * | 2020-10-22 | 2021-01-08 | 清华大学 | Magnetic liquid damping shock absorber based on second-order buoyancy principle |
| CN112196928A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Drawer type magnetic liquid damping vibration absorber |
| CN112196926A (en) * | 2020-10-23 | 2021-01-08 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN112196928B (en) * | 2020-10-23 | 2021-08-17 | 清华大学 | Drawer type magnetic liquid damping vibration absorber |
| CN112196926B (en) * | 2020-10-23 | 2021-08-17 | 清华大学 | Magnetic liquid damping vibration absorber |
| CN113708592A (en) * | 2021-08-19 | 2021-11-26 | 中国科学院宁波材料技术与工程研究所 | Permanent-magnet self-suspension type magnetic liquid kinetic energy collector |
| CN113708592B (en) * | 2021-08-19 | 2022-12-06 | 中国科学院宁波材料技术与工程研究所 | Permanent-magnet self-suspension type magnetic liquid kinetic energy collector |
| CN114439875A (en) * | 2022-01-14 | 2022-05-06 | 清华大学 | Electric eddy current magnetic liquid damping shock absorber |
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| Publication number | Publication date |
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| CN104847826B (en) | 2016-08-17 |
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