CN104675905A - Buffer using magneto-rheological cement gum - Google Patents
Buffer using magneto-rheological cement gum Download PDFInfo
- Publication number
- CN104675905A CN104675905A CN201510102876.1A CN201510102876A CN104675905A CN 104675905 A CN104675905 A CN 104675905A CN 201510102876 A CN201510102876 A CN 201510102876A CN 104675905 A CN104675905 A CN 104675905A
- Authority
- CN
- China
- Prior art keywords
- buffer
- piston
- main body
- lower cover
- magnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
- F16F9/303—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium the damper being of the telescopic type
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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
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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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
-
- 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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/048—High viscosity, semi-solid pastiness
Abstract
The invention discloses a buffer using magneto-rheological cement gum. The buffer comprises a main body unit and a support unit for supporting the main body unit, wherein the main body unit comprises a cylinder block, a lower cover, an upper cover, a piston, a magnetic field device, a coil and the magneto-rheological cement gum; the upper cover and the lower cover are fixedly connected with the upper and lower ends of the cylinder block respectively in order to form a sealed accommodating space; the lower cover is fixedly connected with a support part; the middles of the upper cover and the lower cover are provided with a cover hole respectively; a piston is arranged between the two cover holes; a gap is formed between the piston and the inner wall of the cylinder block; the magnetic field device is fixed on a part, which is arranged in the accommodating space, of the piston; the magnetic field device is wound with the coil along a single direction; the accommodating space is filled with the magneto-rheological cement gum. By adopting the buffer, the buffer force and buffer capacity can be adjusted in a semi-active way, and the stability of the buffer force is improved. Meanwhile, the used magneto-rheological cement gum particles are prevented from settling, the buffer can work for a long time, and the sealing requirement is relatively low.
Description
Technical field
The present invention relates to a kind of buffer using magnetorheological clay, specifically a kind of cushion effect and the adjustable buffer of buffer capacity.
Background technique
Buffer a kind ofly thus alleviates the Safeguard of impact force suffered by protected equipment by absorbing the energy clashing into and produce, can available protecting engineering structure on train, bridge, naval vessel, improves Security.Buffer conventional is at present broadly divided into two types: one is spring buffer, is generally spring and rubber bumper, and this buffer is by being converted into elastic deformation energy to reach buffering object by impact kinetic energy, it is generally used for one-way buffer; Another kind is hydraulic buffer, carrys out dissipation energy by the damped motion of piston between the material such as polyurethane, silicone oil, and its maximum deficiency is that cushion stroke is longer.Its buffer capacity of traditional buffer is many fixes with buffer structure and determines, and tackle high speed impact and complicated impact time cushion effect unsmooth, effectively can not play buffer function.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of buffer using magnetorheological clay, this buffer can carry out semi-active control according to the change of external environment condition, such as regulate cushion effect and buffer capacity, particularly, the present invention changes the viscosity of the magnetorheological clay of filling to regulate cushion effect size by changing electric current, makes full use of cushion stroke, and makes cushion effect more level and smooth.
The present invention propose a kind of buffer of magnetorheological clay that uses comprise: buffer main body unit with for supporting the support unit of described buffer main body unit, wherein:
Described buffer main body unit comprises cylinder body, lower cover, upper cover, piston, magnetic field device, coil and magnetorheological clay, wherein:
Described upper cover and lower cover are fixedly connected with the two ends up and down of described cylinder body respectively, to form the holding space of a sealing;
Described lower cover is fixedly connected with described supporting element, to connect described buffer main body unit and support unit;
The centre of described upper cover and lower cover offers a cap bore respectively, is placed with piston between two cap bore, and is formed with gap between described piston and the inwall of cylinder body;
Described piston is placed in the part in described holding space and is fixed with magnetic field device;
Unidirectionally above described magnetic field device be wound with coil;
Magnetorheological clay is filled with in described holding space.
Alternatively, described support unit comprises base, supporting element and Returnning spring, wherein: described supporting element is fixedly mounted on described base; Described Returnning spring is arranged on the middle part of described base, for making the piston reset in buffer.
Alternatively, cover under described and offer tapped hole, to fill magnetorheological clay in described holding space.
Alternatively, two piston rods that described piston comprises main body and is connected with described main body two ends, described piston rod stretches out upper cover and lower cover respectively, and the main body of described piston is positioned at described holding space, and only occupies accommodating part space.
Alternatively, in the middle of the piston rod of lower cover, also duct is offered, to facilitate coil outlet.
Alternatively, the main body of described piston rod and piston is cylindrical body, and wherein, the diameter of main body is greater than the diameter of piston rod.
Alternatively, in the main body of described piston, symmetry has cut two planes, described plane offers hole to place magnetic field device.
Alternatively, the inwall of described cylinder body is cut and parallel plane two planes in described piston main body part, to make to form parallel clearance between the plane in the plane on described inboard wall of cylinder block and described piston main body part.
Alternatively, described cylinder body and upper and lower covers are magnetic conduction steel material, and described piston is non-magnetic aluminum material.
Alternatively, in described upper cover and lower cover cap bore, be also provided with seal ring, to ensure the sealing of described holding space.
The present invention's advantage is compared with prior art: the present invention makes full use of the advantage of magnetorheological clay viscosity field controllable, filling the viscosity of magnetorheological clay, reaching the object regulating cushion effect by changing flux control buffer inside.One aspect of the present invention can regulate cushion effect to make full use of cushion stroke for different external environments, general damper can be served as without when impacting, improve the viscosity of magnetorheological clay when tackling high speed impact by increasing electric current thus improve buffer capacity; Cushion effect can also be made more level and smooth by meticulously regulating and controlling cushion effect on the other hand, buffering stability improves, and this buffer also can carry out bidirectional buffering if desired.Meanwhile, there is not the problem reducing performance because of particles settling in the magnetorheological clay that the present invention uses, and seal request is relatively not high.
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention uses the buffer of magnetorheological clay;
Fig. 2 is the buffer magnetic field schematic cross-section that the present invention uses magnetorheological clay.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Fig. 1 is the structural representation that the present invention uses the buffer of magnetorheological clay, as shown in Figure 1, the buffer of the magnetorheological clay of described use is piston cylinder operator, particularly, described buffer comprise buffer main body unit with for supporting the support unit of described buffer main body unit, wherein:
Described support unit comprises base 1, supporting element 2 and Returnning spring 12, wherein:
Described supporting element 2 is fixedly mounted on described base 1;
In an embodiment of the present invention, described supporting element 2 is fixedly mounted on described base 1 by bolt 13.
Described Returnning spring 12 is arranged on the middle part of described base 1, for making the piston reset in buffer.
Described buffer main body unit comprises cylinder body 4, lower cover 3, upper cover 5, piston 8, magnetic field device 6, coil 7 and magnetorheological clay 10, wherein:
Described upper cover 5 and lower cover 3 are fixedly connected with the two ends up and down of described cylinder body 4 respectively, to form the holding space of a sealing;
In an embodiment of the present invention, upper cover 5 is fixedly connected with by the up and down two ends of screw thread with described cylinder body 4 with lower cover 3.
Wherein, described lower cover 3 also offers tapped hole, so that fill magnetorheological clay in holding space.
Described lower cover 3 is fixedly connected with described supporting element 2, described buffer main body unit and support unit to be coupled together;
In an embodiment of the present invention, described lower cover 3 is fixedly connected with described supporting element 2 by bolt 11, and described bolt 11 is also filled magnetorheological clay for shutoff simultaneously and covered tapped hole reserved on 3 at present.
Described upper cover 5 offers a cap bore respectively with the centre of lower cover 3, piston 8 is placed with between two cap bore, and be formed with gap between described piston 8 and the inwall of described cylinder body 4, during described piston 8 movement under force, the magnetorheological clay being filled in described holding space inside flows by this gap;
Wherein, two piston rods that described piston 8 comprises main body and is connected with described main body two ends, described piston rod stretches out upper cover 5 and lower cover 3 respectively, and the main body of described piston is positioned at described holding space, and only occupies the holding space of part.
In an embodiment of the present invention, the main body of described piston rod and piston is cylindrical body, and wherein, the diameter of piston main body part is greater than the diameter of piston rod.
Described piston 8 is placed in the part in described holding space and is fixed with magnetic field device;
Particularly, in the main body of described piston 8, symmetry has cut two planes, described plane offers hole with fixed placement magnetic field device, and in an embodiment of the present invention, described magnetic field device 6 is fixed in described hole by sealer.
Wherein, described cylinder body 4 is magnetic conduction steel material with upper and lower covers, in addition, in order to make the magnetic field in the gap between piston 8 and cylinder body 4 more even, the inwall of described cylinder body 4 is also cut and parallel plane two planes in described piston main body part, between the plane on such cylinder body 4 inwall and the plane in described piston main body part, just define parallel clearance.
Wherein, described piston 8 is non-magnetic aluminum material.
In an embodiment of the present invention, in the middle of the piston rod of lower cover 3, also duct is offered, to facilitate coil outlet.
In an embodiment of the present invention, seal ring 9 is also provided with, to ensure the sealing of described holding space in described upper cover 5 and lower cover 3 cap bore.
Described magnetic field device 6 fixed placement is placed in the part in described holding space at described piston 8, follows piston 8 and is synchronized with the movement, and wherein, described magnetic field device 6 is unidirectional is above wound with coil 7;
Magnetorheological clay 10 is filled with in the holding space that described cylinder body 4, upper cover 5 and lower cover 3 are formed.
Concrete, when described buffer real work, described buffer be fixed in need shock absorbing stream oriented device between, between railway car, more specifically, the upper end of described buffer base and piston is fixed in respectively and needs on the stream oriented device of shock absorbing, now, magnetorheological clay in buffer cylinder body is positioned at cylinder body one end near base, under general work pattern, when one end of buffer is stressed, magnetorheological clay in piston press buffer cylinder body in buffer, magnetorheological clay is made to flow to the other end of cylinder body by the parallel clearance formed between cylinder body and magnetic field device in Fig. 2, in the process that described magnetorheological glue mudflow is dynamic, impact energy is consumed by the flowing of its high damping, thus reach the object of shock absorbing.Concrete, when low-frequency excitation, can not apply coil current or only provide light current, now the damping of magnetorheological clay is less, can be used as general damper work, can give like this between the equipment that will protect and leave certain the sphere of activities.For complex road condition or when there is high speed impact, the electric current in coil can be improved, produce magnetic field, use the high-speed response mechanism of magnetorheological clay to change its viscosity rapidly.As shown in Figure 2, coil turn-on current can form the magnetic field perpendicular to magnetorheological glue mud flow direction, thus effectively can increase the viscosity of magnetorheological clay in gap, improve cushion effect, increase power consumption, in addition, the relative size of cushion effect can also be controlled by the electric current in precise controlling coil, make cushion effect more steady, and magnetorheological clay is higher relative to magnetic flow liquid stability, work long hours and the problem of sedimentation also can not occur, and its seal request is relatively low.
In a word, the present invention takes full advantage of magnetorheological clay response magnetorheological performance rapidly, the viscosity of magnetorheological clay can be changed flexibly for different foreign impacts, regulate cushion effect and buffer capacity, make full use of draft gear travel, improve cushioning effect, there is not the problem of particles settling, seal request is also relatively low simultaneously.
Above-described specific embodiment; object of the present invention, technological scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. use the buffer of magnetorheological clay, it is characterized in that, this buffer comprises: buffer main body unit with for supporting the support unit of described buffer main body unit, wherein:
Described buffer main body unit comprises cylinder body, lower cover, upper cover, piston, magnetic field device, coil and magnetorheological clay, wherein:
Described upper cover and lower cover are fixedly connected with the two ends up and down of described cylinder body respectively, to form the holding space of a sealing;
Described lower cover is fixedly connected with described supporting element, to connect described buffer main body unit and support unit;
The centre of described upper cover and lower cover offers a cap bore respectively, is placed with piston between two cap bore, and is formed with gap between described piston and the inwall of cylinder body;
Described piston is placed in the part in described holding space and is fixed with magnetic field device;
Unidirectionally above described magnetic field device be wound with coil;
Magnetorheological clay is filled with in described holding space.
2. buffer according to claim 1, is characterized in that, described support unit comprises base, supporting element and Returnning spring, wherein:
Described supporting element is fixedly mounted on described base;
Described Returnning spring is arranged on the middle part of described base, for making the piston reset in buffer.
3. buffer according to claim 1, is characterized in that, covers and offer tapped hole under described, to fill magnetorheological clay in described holding space.
4. buffer according to claim 1, it is characterized in that, two piston rods that described piston comprises main body and is connected with described main body two ends, described piston rod stretches out upper cover and lower cover respectively, the main body of described piston is positioned at described holding space, and only occupies accommodating part space.
5. buffer according to claim 4, is characterized in that, in the middle of the piston rod of lower cover, also offer duct, to facilitate coil outlet.
6. buffer according to claim 4, is characterized in that, the main body of described piston rod and piston is cylindrical body, and wherein, the diameter of main body is greater than the diameter of piston rod.
7. buffer according to claim 4, is characterized in that, in the main body of described piston, symmetry has cut two planes, described plane offers hole to place magnetic field device.
8. buffer according to claim 6, it is characterized in that, the inwall of described cylinder body is cut and parallel plane two planes in described piston main body part, to make to form parallel clearance between the plane in the plane on described inboard wall of cylinder block and described piston main body part.
9. buffer according to claim 1, is characterized in that, described cylinder body and upper and lower covers are magnetic conduction steel material, and described piston is non-magnetic aluminum material.
10. buffer according to claim 1, is characterized in that, is also provided with seal ring in described upper cover and lower cover cap bore, to ensure the sealing of described holding space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102876.1A CN104675905A (en) | 2015-03-10 | 2015-03-10 | Buffer using magneto-rheological cement gum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102876.1A CN104675905A (en) | 2015-03-10 | 2015-03-10 | Buffer using magneto-rheological cement gum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104675905A true CN104675905A (en) | 2015-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510102876.1A Pending CN104675905A (en) | 2015-03-10 | 2015-03-10 | Buffer using magneto-rheological cement gum |
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| Country | Link |
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| CN (1) | CN104675905A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105020328A (en) * | 2015-07-24 | 2015-11-04 | 重庆材料研究院有限公司 | Magneto-rheological vibration isolation support based on mixed mode |
| CN106337895A (en) * | 2015-07-09 | 2017-01-18 | 苏斯帕有限公司 | Piston device, method for the production of such a piston device and piston cylinder unit comprising such a piston device |
| CN106763444A (en) * | 2016-12-27 | 2017-05-31 | 东南大学 | A kind of anti-precipitation MR damper |
| CN107327533A (en) * | 2017-07-12 | 2017-11-07 | 东南大学 | A kind of magnetorheological mud damper |
| CN107618408A (en) * | 2017-08-31 | 2018-01-23 | 武汉理工大学 | Vehicle seat damping device and automobile based on magnetorheological fluid materials |
| CN110043599A (en) * | 2019-05-08 | 2019-07-23 | 中南大学 | Magnetic rheologic flexible loading device can be positioned |
| CN111173878A (en) * | 2020-01-22 | 2020-05-19 | 西北工业大学 | Self-adaptive viscous damper with self-resetting function |
| CN112460181A (en) * | 2020-11-30 | 2021-03-09 | 重庆理工大学 | Impact-resistant buffer based on permanent magnet excitation |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106337895A (en) * | 2015-07-09 | 2017-01-18 | 苏斯帕有限公司 | Piston device, method for the production of such a piston device and piston cylinder unit comprising such a piston device |
| CN105020328A (en) * | 2015-07-24 | 2015-11-04 | 重庆材料研究院有限公司 | Magneto-rheological vibration isolation support based on mixed mode |
| CN106763444A (en) * | 2016-12-27 | 2017-05-31 | 东南大学 | A kind of anti-precipitation MR damper |
| CN107327533A (en) * | 2017-07-12 | 2017-11-07 | 东南大学 | A kind of magnetorheological mud damper |
| CN107327533B (en) * | 2017-07-12 | 2019-12-10 | 东南大学 | Magneto-rheological mud damper |
| CN107618408A (en) * | 2017-08-31 | 2018-01-23 | 武汉理工大学 | Vehicle seat damping device and automobile based on magnetorheological fluid materials |
| CN107618408B (en) * | 2017-08-31 | 2020-02-18 | 武汉理工大学 | Automobile seat damping device based on magnetorheological fluid material and automobile |
| CN110043599A (en) * | 2019-05-08 | 2019-07-23 | 中南大学 | Magnetic rheologic flexible loading device can be positioned |
| CN111173878A (en) * | 2020-01-22 | 2020-05-19 | 西北工业大学 | Self-adaptive viscous damper with self-resetting function |
| CN112460181A (en) * | 2020-11-30 | 2021-03-09 | 重庆理工大学 | Impact-resistant buffer based on permanent magnet excitation |
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Application publication date: 20150603 |