CN114277706B - Self-adaptive control height limiting device based on magnetorheological fluid - Google Patents
Self-adaptive control height limiting device based on magnetorheological fluid Download PDFInfo
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- CN114277706B CN114277706B CN202210075460.5A CN202210075460A CN114277706B CN 114277706 B CN114277706 B CN 114277706B CN 202210075460 A CN202210075460 A CN 202210075460A CN 114277706 B CN114277706 B CN 114277706B
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- metal shell
- height limiting
- conductive metal
- magnetic
- limiting device
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F13/00—Arrangements for obstructing or restricting traffic, e.g. gates, barricades ; Preventing passage of vehicles of selected category or dimensions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/20—Electromagnets; Actuators including electromagnets without armatures
- H01F7/202—Electromagnets for high magnetic field strength
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to a magnetorheological-based self-adaptive control height limiting device, which comprises steel upright posts arranged on the left side and the right side, wherein the top ends of the upright posts are provided with cross beams, rotatable magnetic conductive metal shells are arranged on the cross beams, a stop plate is connected below the magnetic conductive metal shells, permanent magnet rings fixed with the cross beams are arranged in the magnetic conductive metal shells, and exciting coils are fixedly arranged on the inner wall surfaces, far away from the cross beams, of the magnetic conductive metal shells; a sealing ring is coaxially arranged in the magnetic conduction metal shell, a sealing cavity is formed by the sealing ring, the inner wall of the magnetic conduction metal shell, the permanent magnet ring or the fixing piece and the exciting coil in a surrounding manner, and magnetorheological fluid is filled in the sealing cavity; the stop plate is provided with a speed switch with a time delay function, and the height limiting device further comprises a direct current power supply, wherein the direct current power supply, the speed switch and the exciting coil are connected into a current loop through wires. The invention improves the defects of the steel frame height limiting rod and the flexible height limiting rod, can change the rotation resistance of the stop plate according to whether the speed of the vehicle reaches a set value or not, and ensures that the vehicle is blocked down when the speed is lower and can safely pass when the speed is higher.
Description
Technical Field
The invention belongs to the field of civil traffic engineering, and particularly relates to a magnetorheological-based self-adaptive control height limiting device.
Background
The height limiting rods are often arranged on some roads and bridges with lower bearing capacity and longer new construction or service time, and are mainly used for limiting the passing of ultrahigh and heavy-load vehicles, so that the functions of protecting the roads and bridges and guaranteeing the driving safety are achieved. At present, no specific standard exists for the height and width of the height limiting rod, the movable device, the color, the material and the like in China, and under the common condition, the height limiting rod mostly adopts a firm steel frame structure, and also has a part of flexible height limiting rods formed by vertically hanging steel plates or rubber materials and the like below the cross rods.
The practical application effect shows that although the steel frame structure height limiting rod can effectively limit the passing of the ultrahigh vehicle, when the warning of the height limiting rod is not obvious or a driver fails to timely find, the vehicle can easily strike the height limiting rod at a higher speed, so that the vehicle and the height limiting rod are damaged and block traffic, and the personal safety of the driver and passengers can be endangered when serious, and serious life and property loss is caused; although the flexible height-limiting rod can effectively prevent car accidents and traffic jams caused by high-speed bumps, when a driver has a life-to-life, the driver can forcibly pass through the flexible height-limiting rod suspended with a steel plate or rubber material only by slowing down the car. Therefore, the flexible height-limiting rod cannot play an effective height-limiting role in certain situations, and damage to the road bridge by the ultrahigh vehicle is likely to be caused.
Disclosure of Invention
The invention aims to provide a self-adaptive control magnetorheological height limiting device capable of automatically adjusting the impact force according to the change of the vehicle speed, so as to solve the problems that a steel frame structure height limiting rod is easy to crash and cause traffic accidents and traffic jams in the prior art, and solve the problem that a flexible height limiting rod cannot limit the height of a low-speed vehicle.
In order to achieve the above purpose, the adaptive control height limiting device based on magneto-rheological adopts the following technical scheme: a self-adaptive control height limiting device based on magnetorheological comprises a steel upright post, wherein the left side and the right side of the steel upright post are respectively provided with a cylindrical steel cross beam; one or more annular magnetic conductive metal shells capable of rotating around the axis of the cross beam are arranged at equal intervals along the length direction of the cross beam, the magnetic conductive metal shells are connected with the cross beam through rolling bearings, annular grooves are engraved in the magnetic conductive metal shells along the radial direction, non-magnetic conductive annular bases are fixedly arranged on the cross beam in the annular grooves of the magnetic conductive metal shells, annular permanent magnets are fixedly arranged on the peripheral surfaces of the annular bases, and exciting coils are coaxially and fixedly wound on the inner wall surfaces, far away from the cross beam, of the annular grooves of the magnetic conductive metal shells; gaps are reserved between the exciting coil and the permanent magnet in the radial direction and between the permanent magnet and the annular groove of the magnetic conductive metal shell in the axial direction; coaxial annular sealing rings are filled between the inner surface of the annular groove of the magnetic conductive metal shell and the outer surfaces of the two sides of the annular base, a sealing cavity is formed by the outer surfaces of the sealing rings, the inner wall of the annular groove of the magnetic conductive metal shell, the permanent magnet and the exciting coil, and magnetorheological fluid is filled in the sealing cavity; a rectangular rubber stop plate is fixedly arranged under the outer peripheral surface of the magnetic conductive metal shell through a round steel pipe; a speed switch with a time delay function is arranged at the left lower part of the surface of the rectangular rubber stop plate, two wires are connected to the outside of the speed switch, one wire is connected with a direct current power supply arranged below the cross beam, the other wire is connected with a joint of the outermost layer of the exciting coil, and a joint of the innermost layer of the exciting coil is connected with the direct current power supply; the direct current power supply, the speed switch, the exciting coil and the lead jointly form a complete self-adaptive control current loop.
The magnetic conductive metal shell is rotatably arranged on the cross beam through a bearing.
The non-magnetic annular base is made of stainless steel.
The direct current power supply can be charged by a solar panel or can be powered by an alternating current power supply.
The magnetic conductive metal shell is electrical pure iron DT4.
The speed sensor in the speed switch can receive the pulse frequency generated by the ultrahigh vehicle to be monitored, has a time delay function, and can be automatically disconnected after being electrified for a period of time.
The invention has the beneficial effects that: under the working state, the exciting coil, the direct-current power supply and the speed switch are connected with a travel self-adaptive control current loop through wires, and a speed sensor in the speed switch can receive pulse frequency generated by the ultrahigh vehicle to be monitored. When the tested ultrahigh vehicle is ready to forcedly pass through the height limiting device at a low speed, the generated pulse frequency is smaller than the set frequency of the speed switch, the speed switch is turned off, the magnetic field excited by the permanent magnet ring is densely distributed in magnetorheological fluid, the shear strength of the magnetorheological fluid is high, and the magnetic conductive metal shell and the rectangular rubber stop plate are fixed on the cross beam and cannot rotate, so that the ultrahigh vehicle cannot pass through. When the detected ultrahigh vehicle approaches to the height limiting device at a high speed due to carelessness, the generated pulse frequency is larger than the set frequency of the speed switch, the speed switch is closed, current is generated in the self-adaptive control current loop, the magnetic field generated after the exciting coil is electrified and the magnetic field generated by the permanent magnet ring are mutually offset, the shearing yield strength of magnetorheological fluid in the sealing cavity is almost zero under the condition that no magnetic field exists, the magnetic conduction metal shell can freely rotate around the cross beam along with the rectangular rubber stop plate, and the vehicle can safely pass through. After the impact is finished, the rectangular rubber stop plate is restored to the original position under the action of dead weight during the speed opening Guan Yan, and normal operation is continued. Meanwhile, the defect of the steel frame structure height limiting rod and the flexible height limiting rod is overcome.
Drawings
FIG. 1 is a schematic diagram of one embodiment of an adaptive control magnetorheological height-limiting device of the present invention;
fig. 2 is a schematic cross-sectional view of the inner structure of the magnetically conductive metal housing in fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
One embodiment of the adaptive control height limiting device based on magneto-rheological is provided by the invention: as shown in fig. 1 and 2, the self-adaptive control magnetorheological height limiting device comprises a steel upright post 1 arranged on the left side and the right side, and a cylindrical steel cross beam 2 fixedly connected to the top end of the upright post 1; one or more annular magnetic metal shells 3 capable of rotating around the axis of the cross beam 2 are arranged at equal intervals along the length direction of the cross beam 2, the magnetic metal shells 3 are connected with the cross beam 2 through rolling bearings 4, annular grooves are engraved in the magnetic metal shells 3 along the radial direction, a non-magnetic annular base 5 is fixedly arranged on the cross beam 2 in the annular grooves of the magnetic metal shells 3, an annular permanent magnet annular ring 6 is fixedly arranged on the outer peripheral surface of the annular base 5, an exciting coil 7 is fixedly wound on the inner wall surface, far away from the cross beam 2, of the annular grooves of the magnetic metal shells 3 in a coaxial line, and magnetic induction wires 61 generated by the permanent magnet annular ring 6 are densely distributed in the magnetic metal shells 3 around the exciting coil 7; gaps are reserved between the exciting coil 7 and the permanent magnet ring 6 in the radial direction and between the permanent magnet ring 6 and the annular groove of the magnetic conductive metal shell 3 in the axial direction; coaxial annular sealing rings 8 are filled between the inner surface of the annular groove of the magnetic conductive metal shell 3 and the outer surfaces of the two sides of the annular base 5, a sealing cavity is formed by the outer surfaces of the sealing rings 8, the inner wall of the annular groove of the magnetic conductive metal shell 3, the permanent magnet ring 6 and the exciting coil 7, and magnetorheological fluid 9 is filled in the sealing cavity; a rectangular rubber stop plate 11 is fixedly arranged under the outer peripheral surface of the magnetic conductive metal shell 3 through a round steel pipe 10; a speed switch 21 with a time delay function is arranged at the left lower part of the surface of the rectangular rubber stop plate 11, two wires are connected to the outside of the speed switch 21, one wire is connected with a direct current power supply 22 arranged below the cross beam 2, the other wire is connected with a joint of the outermost layer of the exciting coil 7, and a joint of the innermost layer of the exciting coil 7 is connected with the direct current power supply 22; the direct current power supply 22, the speed switch 21, the exciting coil 7 and the wires together form a complete self-adaptive control current loop.
The working principle of the self-adaptive control magnetorheological height limiting device provided by the invention is as follows: in the working state, the exciting coil 7, the direct-current power supply 22, the speed switch 21 and the lead form an adaptive control current loop, and a speed sensor in the speed switch 21 can receive pulse frequency generated by the ultrahigh vehicle to be monitored. When the superelevation vehicle to be tested is ready to forcedly pass through the height limiting device at a low speed, the generated pulse frequency is smaller than the set frequency of the speed switch, at the moment, the speed switch 21 is in an on state, and the self-adaptive control current loop has no current; the magnetic field excited by the permanent magnet ring 6 is densely distributed in the magnetorheological fluid 9, the shearing yield strength of the magnetorheological fluid 9 is very high, the magnetic conductive metal shell 3, the permanent magnet ring 6 and the non-magnetic conductive annular base 5 are firmly fixed together and cannot rotate, so that the rectangular rubber stop plate 11 vertically and fixedly arranged below the magnetic conductive metal shell 3 through the round steel pipe 10 can effectively play a role in blocking, and vehicles cannot pass through. When the detected ultrahigh vehicle approaches to the height limiting device at a high speed due to carelessness, the generated pulse frequency is larger than the set frequency of the speed switch, at the moment, the speed switch is in a closed state, current is generated in a self-adaptive control current loop, a magnetic field is generated after the exciting coil 7 is electrified, the direction of the magnetic field generated by the exciting coil 7 is opposite to that of the magnetic field generated by the permanent magnet ring 6, the magnetic fields in the sealing cavity are mutually offset due to opposite directions, the magnetorheological fluid 9 presents Newtonian fluid characteristics with low viscosity under the condition of zero magnetic field, and the shearing yield strength is almost zero; when the ultrahigh vehicle impacts the rectangular rubber stop plate 11 at a high speed, the magnetic conductive metal shell 3 can freely rotate around the cross beam 2 along with the rectangular rubber stop plate 11, so that impact force is greatly reduced, the vehicle passes safely, the speed switch 21 is automatically disconnected after a time delay after the impact is finished, and the rectangular rubber stop plate 11 is restored to the original position under the action of dead weight during the time delay of the speed switch 21. After each time of work is completed, the speed switch 21 and the magnetic conductive metal shell 3 fixedly provided with the rectangular rubber stop plate 11 are automatically restored to the original positions, and normal work is continued.
The self-adaptive control magnetorheological height limiting device simultaneously improves the defects of the steel frame structure height limiting rod and the flexible height limiting rod, can change the rotation resistance of the self-part according to whether the speed of the ultrahigh vehicle reaches a set value or not when the vehicle is impacted, ensures that the ultrahigh vehicle is blocked down when the speed is lower, can safely pass when the speed is higher, and avoids traffic accidents; the reaction time of the height limiting device is extremely short due to the 9 millisecond reaction speed of the magnetorheological fluid, and the safety and reliability are high.
In other embodiments of the present invention, the permanent magnet ring 6 is directly fixed on the beam 2 without the non-magnetic ring-shaped base 5, and at this time, the sealing ring 8, the inner wall of the magnetic metal housing 3, the permanent magnet ring 6 and the exciting coil 7 form a sealing cavity; the number of the stop main bodies can be adjusted according to actual needs; the rubber material of the stopper plate 11 may be replaced by a flexible material such as sponge.
Claims (6)
1. The utility model provides a self-adaptation control limit for height device based on magnetorheological which characterized in that: the magnetic conduction metal shell is characterized by comprising a steel upright post at the left end and the right end and a cross beam fixedly arranged at the top end of the steel upright post, at least one magnetic conduction metal shell capable of rotating around the cross beam is arranged along the length direction of the cross beam, a stop plate is connected below each magnetic conduction metal shell, a permanent magnet ring is fixedly arranged in each magnetic conduction metal shell through a non-magnetic conduction annular base, the non-magnetic conduction annular base is fixedly arranged on the cross beam, and an excitation coil is coaxially and fixedly arranged on the inner wall surface of the magnetic conduction metal shell far away from the cross beam; gaps are formed between the exciting coil and the permanent magnet ring in the radial direction and between the permanent magnet ring and the magnetic conductive metal shell in the axial direction, a sealing ring is coaxially arranged in the magnetic conductive metal shell, a sealing cavity is formed by the sealing ring and the inner wall of the magnetic conductive metal shell, the permanent magnet ring and the exciting coil in a surrounding manner, and magnetorheological fluid is filled in the sealing cavity; the speed switch with a time delay function is arranged on the stop plate, the speed switch comprises a speed sensor capable of receiving pulse frequency generated by a vehicle to be monitored, the height limiting device further comprises a direct current power supply, and the direct current power supply, the exciting coil and the speed switch form a self-adaptive control current loop through wires;
the magnetic conductive metal shell is rotatably arranged on the cross beam through a bearing; the magnetic conductive metal shell is made of electrical pure iron DT4.
2. The magnetorheological-based adaptive control height limiting device according to claim 1, wherein: the permanent magnet ring is fixedly sleeved on the outer peripheral surface of the non-magnetic annular base, and the sealing cavity is defined by the sealing ring, the inner wall of the magnetic metal shell, the permanent magnet ring and the exciting coil.
3. The magnetorheological-based adaptive control height limiting device according to claim 1, wherein: the direct current power supply is charged by the solar panel.
4. The magnetorheological-based adaptive control height limiting device according to claim 1, wherein: the direct current power supply is charged by an alternating current power supply.
5. The magnetorheological-based adaptive control height limiting device according to claim 1, wherein: the stop plate is a rubber plate, and the rubber plate is connected to the magnetic conductive metal shell through a connecting rod.
6. The magnetorheological-based adaptive control height limiting device according to claim 5, wherein: the connecting rod is a round steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210075460.5A CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810051396.0A CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
| CN202210075460.5A CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810051396.0A Division CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
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| CN114277706A CN114277706A (en) | 2022-04-05 |
| CN114277706B true CN114277706B (en) | 2023-05-09 |
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| CN202210075460.5A Active CN114277706B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control height limiting device based on magnetorheological fluid |
| CN201810051396.0A Active CN108193615B (en) | 2018-01-19 | 2018-01-19 | Self-adaptive control magnetorheological height limiting device |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002365156A1 (en) * | 2001-11-08 | 2003-07-09 | Satcon Technology Corporation | Continuously variable transmissions using magnetorheological fluid or oil shear and methods of and systems for using the same in a vehicle, in-wheel application |
| KR101359181B1 (en) * | 2011-12-23 | 2014-02-12 | 주식회사 포스코 | Active guard fence |
| KR101603846B1 (en) * | 2014-06-20 | 2016-03-25 | 정광용 | Robot Apparatus of Traffic Control Mannequin |
| CN104404896B (en) * | 2014-12-02 | 2016-03-16 | 四川大学 | Intelligent magneto-rheological deceleration strip |
| CN104652316A (en) * | 2015-02-02 | 2015-05-27 | 辽宁石油化工大学 | Safety height limiting rod |
| CN104652319B (en) * | 2015-02-07 | 2017-02-22 | 辽宁石油化工大学 | Inflatable safe height-limiting rod |
| CN204898552U (en) * | 2015-07-13 | 2015-12-23 | 山东省五金研究所 | Warning limit for height railing |
| CN204825698U (en) * | 2015-07-29 | 2015-12-02 | 胡中林 | Limit for height pole |
| CN105421260B (en) * | 2015-10-30 | 2017-07-14 | 贾峰 | Highway anti-collision height limit frame |
| CN206486833U (en) * | 2016-12-27 | 2017-09-12 | 西安品质信息科技有限公司 | A kind of multistage intelligent limit for height system |
| CN208266735U (en) * | 2018-01-19 | 2018-12-21 | 郑州大学 | A kind of magnetorheological height limiter of self adaptive control |
-
2018
- 2018-01-19 CN CN202210075460.5A patent/CN114277706B/en active Active
- 2018-01-19 CN CN201810051396.0A patent/CN108193615B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108193615A (en) | 2018-06-22 |
| CN108193615B (en) | 2023-05-12 |
| CN114277706A (en) | 2022-04-05 |
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