CN107435706B - The permanent magnet type magnetic current variable fluid damper that a kind of piston and self-adaptive damping are adjusted - Google Patents
The permanent magnet type magnetic current variable fluid damper that a kind of piston and self-adaptive damping are adjusted Download PDFInfo
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- CN107435706B CN107435706B CN201710757943.2A CN201710757943A CN107435706B CN 107435706 B CN107435706 B CN 107435706B CN 201710757943 A CN201710757943 A CN 201710757943A CN 107435706 B CN107435706 B CN 107435706B
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- piston
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- ball
- adjusting rod
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Classifications
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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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
- F16F9/535—Magnetorheological [MR] fluid dampers
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to damper fields, and disclose a kind of piston and permanent magnet type magnetic current variable fluid damper that self-adaptive damping is adjusted.Piston only is divided into inner piston and covers the outer piston outside it, and the longitudinal center line direction of inner piston is provided with through-hole, is provided with magnet in through-hole；Piston rod is connect with piston only, and it is concentric, the longitudinal center line direction of piston rod is provided with blind hole, is provided with the adjusting rod connecting with magnet in blind hole, adjusting rod and outer surface be provided with raised ball, and corresponding curve track is provided at piston rod inner wall and the ball engagement, wherein, curve track is divided into three sections, and first segment and third section are symmetrical about interlude, and it is disposed as arc, interlude is straightway.Through the invention, realize that the size of damping force can be adjusted according to load and sliding stroke size adaptation, pure mechanic structure use scope is wide, and structure is simple, high reliablity.
Description
Technical field
The invention belongs to damper field, the magneto magnetic adjusted more particularly, to a kind of piston and self-adaptive damping
Rheology fluid damper.
Background technique
MR damper is a kind of On A Retrofitted Damper that market prospects are fabulous, has damping controllable, small in size, high-efficient
The advantages of.MR damper makes the magnetorheological fluid quickly newton liquid of (Millisecond time) in good fluidity by controlling magnetic field
Body and high viscosity, low-flow Bingham plastic solid between convert, to realize the adjustable of damping force.At present on the market
The MR damper of supply can be divided into electromagnetism MR damper and the magnetorheological resistance of permanent magnetism according to the property of used magnet
Buddhist nun's device.The MR damper of electromagnetism adjustable type, such as the RD-1005 type installed in yueyang, hunan Dongting Lake Bridge are magnetorheological
Damper, though the vibration problem of stay cables of bridge is efficiently solved, after having run certain time limit, power supply system exposure
Some problems out, such as aging circuit, power supply system is unstable, and wind and rain possibly can not temporarily power for damper, does not power
Electromagnetism MR damper damping force it is smaller, can not effectively inhibit Inclined Cable Vibration, it is broken even to will cause damper under high wind
It is bad.In contrast, permanent magnet type magnetic current variable damper be used in stay cable of cable-stayed bridge vibration damping field have higher reliability, one
Aspect is not necessarily to power supply system, and another aspect is compact-sized, simple, can assemble.
In order to make permanent magnetism magnetic rheological liquid damper that there is better damping property, higher reliability, damped coefficient more
Facilitate adjustable, existing invention and the relevant technologies have proposed a variety of methods, as Chinese invention patent CN103062278A is disclosed
A kind of adjustable magneto suspension cable magnetic rheological liquid damper (Patent No. 201310034457.X) of damped coefficient, using pressure spring
Permanent magnet is adjusted with adjusting rod, adjusting rod stretches out piston rod, can be real by turning nut adjustment magnet angle manually
The adjustment of damped coefficient is showed, but the invention needs to give a forecast to situations such as weather and then send out during practice
Moving power is manually adjusted in advance；Chinese invention patent CN1632345A discloses a kind of permanent-magnet adjusting assembled magnetorheological liquid
Damper (Patent No. 200510031108.8) passes through the flower being arranged between piston and piston rod using assembling structure
Key throttling, by adjusting position of the permanent magnet in cylinder body to control the size of damping force, realizing can assemble, is easy-maintaining, hindering
The characteristics of Buddhist nun's coefficient is easily adjusted, but still need to manually adjust damper, it can not accomplish that real-time is adjusted.
It can be seen that the existing adjustable suspension cable permanent magnet type magnetic current variable fluid damper of damped coefficient is generally to pass through manually
Operation is to adjust damped coefficient, and classification is adjusted manually, adjustment process heavy workload, needs to forecast in advance and adjust one by one, cannot
Accomplish real-time, adaptive.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of pistons and self-adaptive damping to adjust
Permanent magnet type magnetic current variable fluid damper thus turning for magnet is solved by the design to curve track in piston rod and permanent magnet
Dynamic automatic adjusument and damped coefficient needs the technical issues of manually adjusting.
To achieve the above object, according to one aspect of the present invention, provide a kind of piston, the piston include piston rod and
Piston only, which is characterized in that
The piston only is divided into inner piston and covers the outer piston outside it, and the longitudinal center line direction of the inner piston is set
It is equipped with through-hole, is provided with magnet in the through-hole；The piston rod is connect with the piston only, and concentric, the piston rod
Longitudinal center line direction is provided with blind hole, and the adjusting rod connecting with the magnet, the appearance of the adjusting rod are provided in the blind hole
Face is provided with raised ball, and corresponding curve track is provided at the piston rod inner wall and the ball engagement, wherein institute
It states curve track and is divided into three sections, first segment and third section are symmetrical about interlude, and are disposed as arc, and the interlude is straight
Line segment.
It is further preferred that the inner piston is equipped with U-type groove, the U-type groove and the outer work in the axial direction along piston
It fills in inner wall and forms through-hole.
It is further preferred that the magnet end is connected with spring.The spring allows the rotation of magnet nominal angle, and
Limit the translation of magnet axial direction.
It is further preferred that being additionally provided with pin shaft in the through-hole, which connect with the spring.
It is further preferred that the magnet uses permanent magnetic iron.
Other side according to the invention, the present invention also provides the permanent magnet type magnetic current variables that a kind of self-adaptive damping is adjusted
A kind of fluid damper comprising piston.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the present invention passes through the slideway of setting curve, and piston rod can pass through the cooperation of slideway and ball in the process of movement
The adjusting rod and magnet for making magnet generate rotation, realize the automatic adjusument of magnet movement；
2, by the present invention in that with pure mechanic structures such as permanent magnetic iron and adjusting rods, so that whole device is in use process
In do not need power-driven system, can be still applicable under the conditions of even earthquake etc. is exceedingly odious in high wind, typhoon, the scope of application
Extensively；
3, the damper that the present invention is adjusted by the self-adaptive damping provided, so that the opposite position between magnet and flowing hole
The relationship of setting changes, so that the automatic adjusument of damping force is realized, in addition, the curve of slideway can be according to the reality of suspension cable
Situation design accomplishes that the size of damping force can be adjusted according to load and sliding stroke size adaptation, does not need manually to adjust
It is whole, reduce labor intensity；
4, piston structure provided by the invention is simple, function is integrated, stability is good, high reliablity.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of piston constructed by preferred embodiment according to the invention；
Fig. 2 is the permanent magnet type magnetic current variable liquid of self-adaptive damping regulating mechanism constructed by preferred embodiment according to the invention
The structural schematic diagram of damper；
Fig. 3 (a) be ball constructed by preferred embodiment according to the invention be located at curve slideway interlude when magnet
With the sectional view of flowing hole relative position；
Fig. 3 (b) is first or the third section that ball constructed by preferred embodiment according to the invention is located at curve slideway
When magnet and flowing hole relative position sectional view；
Fig. 4 be ball constructed by preferred embodiment according to the invention be located at curve slideway interlude when section
Figure；
Fig. 5 be ball constructed by preferred embodiment according to the invention be located at curve slideway third section when section
Figure.
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which:
1- piston rod 2- adjusting rod 3- curve slideway 4- flowing hole 5- inner piston 6- outer piston 7- ball 8- magnet
14 left side 15- left chamber 16- right chamber of 9- spring 10- pin shaft 12- cylinder body
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Fig. 1 is a kind of structural schematic diagram of piston constructed by preferred embodiment according to the invention, as shown in Figure 1, should
Piston includes piston rod 1 and piston only, and piston only is formed by outer piston 6 is nested with inner piston 5, and outer piston 6 is spacious in both ends
The tubular of mouth, about 5 inner piston open U-type groove, and U-type groove and outer piston 6 form flowing hole 5.Permanent magnet 8 is connected to by spring 9
On pin shaft 10, spring 9 limits the left and right displacement of magnet 8, and magnet 8 is allowed to rotate.8 left end of magnet connects adjusting rod 2, adjusting rod
2 protrude into the circular opening of piston rod 1, and adjusting rod 2 controls the rotation of magnet 8, have protrusion spherical ball 7 on adjusting rod 2, accordingly
Piston rod 1 on the inside of have curve slideway 3, ball 7 slides in slideway 3 always.
In above scheme, pin shaft 10 is inserted into the axially extending bore of inner piston 5, and piston is under outer load action in pin shaft 10
It horizontally slips between cylinder body, the spherical ball 7 on adjusting rod 2 is slided in slideway 3 can drive adjusting rod 2 and 8 turns of magnet
It is dynamic, form the mechanism for adjusting damped coefficient.
The scheme of offer according to the invention, Fig. 2 are self-adaptive dampings constructed by preferred embodiment according to the invention
The structural schematic diagram of the permanent magnet type magnetic current variable fluid damper of regulating mechanism, as shown in Fig. 2, the damper include piston, cylinder body 12,
Left otic placode, auris dextra plate and left side 14, piston is arranged in cylinder body, and piston rod is connect with left side 14, and piston only passes through
Pin shaft is connect with auris dextra plate, piston and cylinder body, and left side forms left chamber 15 and right chamber 16 after connecting with auris dextra plate, below will
Introduce the motion process of the damper: when external load band piston horizontally slips, magnetorheological fluid can circulate in work by flowing hole 4
The two chambers that plug is formed with cylinder body will become class solid state under the action of magnet 8 when magnetorheological fluid passes through flowing hole 4
Damping force is generated rapidly.Flowing hole 4 faces the damping force maximum generated when 8 magnetic pole of magnet, when flowing hole 4 and 8 magnetic pole of magnet
When forming differential seat angle, damping force reduces, and the bigger damping force of differential seat angle is smaller.Poor, the load to 8 one 30 ° of initial angle of magnet
Smaller, when piston stroke is smaller, Fig. 3 (a) is that ball 7 constructed by preferred embodiment according to the invention is located at curve slideway 3
Interlude when magnet 8 and 4 relative position of flowing hole sectional view, Fig. 4 is constructed by preferred embodiment according to the invention
Ball 7 is located at the sectional view when interlude of curve slideway 3, and as shown in Fig. 3 (a) and 4, the ball 7 on adjusting rod 2 is in slideway 3
Straightway sliding, for the angle of adjusting rod 2 and magnet 8 there is no variation, damping force keeps the smallest level；Fig. 3 (b) be by
Magnet 8 and flowing hole 4 when being located at first or third section of curve slideway 3 according to ball 7 constructed by the preferred embodiment of the present invention
The sectional view of relative position, as shown in Fig. 3 (b), when load increases, piston stroke increases, and it is sliding that ball 7 enters 3 curved section of slideway
It is dynamic, drive adjusting rod 2 and magnet 8 to rotate, 8 magnetic pole of magnet and 4 differential seat angle of flowing hole reduce, when magnetorheological fluid passes through flowing hole 4
The damping force of generation increases rapidly, and when piston stroke reaches maximum value, 8 magnetic pole of magnet and flowing hole 4 are perfectly aligned, and Fig. 5 is
Ball 7 constructed by preferred embodiment according to the invention is located at the sectional view when third section of curve slideway 3, such as Fig. 3 (b) and
Shown in Fig. 5, the damping force that damper generates reaches maximum.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of piston, which includes piston rod (1) and piston only, which is characterized in that
The piston only is divided into inner piston (5) and covers the outer piston (6) outside it, the longitudinal center line direction of the inner piston
It is provided with through-hole, magnet (8) are provided in the through-hole；The piston rod (1) connect with the piston only, and concentric, should
The longitudinal center line direction of piston rod (1) is provided with blind hole, and the adjusting rod connecting with the magnet (8) is provided in the blind hole
(2), the outer surface of the adjusting rod is provided with raised ball (7), and is provided at the piston rod inner wall and the ball engagement
Corresponding curve track (3), wherein the curve track is divided into three sections, and first segment and third section are symmetrical about interlude, and
It is set as arc, the interlude is that straightway is made when by extraneous load by the cooperation of the curve slideway and ball
The adjusting rod and magnet of magnet generate rotation, and the automatic adjusument of magnet angle is realized with this.
2. a kind of piston as described in claim 1, which is characterized in that the inner piston is equipped with U in the axial direction along piston
Type groove, the U-type groove and the outer piston inner wall form flowing hole (4).
3. a kind of piston as described in claim 1, which is characterized in that the magnet end is connected with spring (9).
4. a kind of piston as claimed in claim 3, which is characterized in that be additionally provided with pin shaft (10), the pin shaft in the through-hole
It is connect with the spring (9).
5. a kind of piston as described in claim 1, which is characterized in that the magnet uses permanent magnetic iron (8).
6. the permanent magnet type magnetic current variable fluid damper that a kind of self-adaptive damping is adjusted, which is characterized in that any including claim 1-5
Piston described in, cylinder body, left otic placode, auris dextra plate and left side (14), the piston are arranged in cylinder body, and piston rod and a left side
End face (14) connection, piston only are connect by pin shaft with auris dextra plate, and piston and cylinder body, left side are formed after connecting with auris dextra plate
Left chamber (15) and right chamber (16) are provided with magnetorheological fluid in the left chamber (15) and right chamber,
When the extraneous load being subject to is small, the ball (7) on the adjusting rod (2) is slided in the straightway of curve slideway (3), is adjusted
The angle of pole (2) and magnet (8) does not change, and damping force keeps the smallest level, described when being increased by extraneous load
Ball (7) enters the curve slideway (3) curved section and slides, and adjusting rod (2) and magnet (8) rotation is driven, so that magnet (8) magnetic
Pole and flowing hole (4) differential seat angle reduce, so that damping force of the magnetorheological fluid through generating when flowing hole (4) increases, when the piston
When stroke reaches maximum value, magnet (8) magnetic pole and flowing hole (4) are perfectly aligned, and the damping force that damper generates reaches maximum, by
This realizes that damping adaptive is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757943.2A CN107435706B (en) | 2017-08-29 | 2017-08-29 | The permanent magnet type magnetic current variable fluid damper that a kind of piston and self-adaptive damping are adjusted |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710757943.2A CN107435706B (en) | 2017-08-29 | 2017-08-29 | The permanent magnet type magnetic current variable fluid damper that a kind of piston and self-adaptive damping are adjusted |
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| Publication Number | Publication Date |
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| CN107435706A CN107435706A (en) | 2017-12-05 |
| CN107435706B true CN107435706B (en) | 2019-04-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374862A (en) * | 2018-02-14 | 2018-08-07 | 重庆恩光科技有限公司 | Energy saving and environment friendly single-stage variable damping buffer |
| CN108397508A (en) * | 2018-02-14 | 2018-08-14 | 重庆恩光科技有限公司 | Energy saving and environment friendly magnetorheological fluid twin-stage variable damping device |
| CN109027097B (en) * | 2018-06-25 | 2020-11-13 | 武汉船用机械有限责任公司 | Hydraulic damping device |
| CN110398581B (en) * | 2019-07-26 | 2022-04-12 | 李宝玉 | High fill inflation soil foundation on-spot rainfall simulation testing arrangement |
| CN112761032A (en) * | 2019-09-20 | 2021-05-07 | 南安市董山尾机械科技有限公司 | Track vibration isolator and method |
| CN112855826B (en) * | 2020-12-24 | 2022-06-21 | 湖北航天飞行器研究所 | Energy-saving self-locking type magnetorheological damper |
| CN115163723B (en) * | 2022-08-11 | 2023-06-09 | 甘肃盛宏建筑工程有限责任公司 | Magneto-rheological variable damping vibration attenuation energy consumption device |
| CN115962243B (en) * | 2022-12-13 | 2023-11-07 | 华中科技大学 | Axial magnetic flux permanent magnet hysteresis damper with adjustable air gap |
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| US3782710A (en) * | 1972-11-08 | 1974-01-01 | Sheffer Corp | Adjustable hydraulic linear decelerator |
| DE2723102A1 (en) * | 1977-05-21 | 1978-11-23 | Walter Holzer | Rotating shutter connected to gas spring piston - varies effective pressure compensation cross=section, with adjustment by connecting rod rotation |
| CN103062278A (en) * | 2013-01-29 | 2013-04-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Permanent magnet stay cable magneto-rheological fluid damper with adjustable damping coefficient |
| CN104712701A (en) * | 2015-03-21 | 2015-06-17 | 三峡大学 | Multi-hole adjustable multi-variable-load hydraulic buffer |
| CN106246797A (en) * | 2016-08-25 | 2016-12-21 | 奇瑞商用车（安徽）有限公司 | A kind of magnetic rheological liquid damper |
-
2017
- 2017-08-29 CN CN201710757943.2A patent/CN107435706B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3782710A (en) * | 1972-11-08 | 1974-01-01 | Sheffer Corp | Adjustable hydraulic linear decelerator |
| DE2723102A1 (en) * | 1977-05-21 | 1978-11-23 | Walter Holzer | Rotating shutter connected to gas spring piston - varies effective pressure compensation cross=section, with adjustment by connecting rod rotation |
| CN103062278A (en) * | 2013-01-29 | 2013-04-24 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Permanent magnet stay cable magneto-rheological fluid damper with adjustable damping coefficient |
| CN104712701A (en) * | 2015-03-21 | 2015-06-17 | 三峡大学 | Multi-hole adjustable multi-variable-load hydraulic buffer |
| CN106246797A (en) * | 2016-08-25 | 2016-12-21 | 奇瑞商用车（安徽）有限公司 | A kind of magnetic rheological liquid damper |
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