CN110671462A - Combined type buffering energy-absorbing device based on magnetorheological fluid - Google Patents
Combined type buffering energy-absorbing device based on magnetorheological fluid Download PDFInfo
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- CN110671462A CN110671462A CN201910869295.9A CN201910869295A CN110671462A CN 110671462 A CN110671462 A CN 110671462A CN 201910869295 A CN201910869295 A CN 201910869295A CN 110671462 A CN110671462 A CN 110671462A
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- Prior art keywords
- buffer
- magnetorheological fluid
- fixed
- collision energy
- magnetorheological
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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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/26—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions
- F16F13/30—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids
- F16F13/305—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper characterised by adjusting or regulating devices responsive to exterior conditions comprising means for varying fluid viscosity, e.g. of magnetic or electrorheological fluids magnetorheological
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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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/01—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand
- F16F7/015—Vibration-dampers; Shock-absorbers using friction between loose particles, e.g. sand the particles being spherical, cylindrical or the like
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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
- F16F2230/00—Purpose; Design features
- F16F2230/0041—Locking; Fixing in position
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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
- F16F2230/00—Purpose; Design features
- F16F2230/10—Enclosure elements, e.g. for protection
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a composite buffering energy-absorbing device based on magnetorheological fluid, which comprises a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagonal bolt (4), an M20 hexagonal nut (5), an M8 straight-line screw (6), a No. 1 magnetorheological fluid buffer (7), a small steel ball (8), a collision energy-absorbing cavity (9), a No. 1 buffer spring (10), a spring connecting plate (11), a No. 2 magnetorheological fluid buffer (12), a right-angle fixed block (13), an M30 bolt (14), a No. 3 magnetorheological fluid buffer (15), a No. 2 buffer spring (16), a piston valve (17), an air compensation cavity (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and magnetorheological fluid (22). The combined type buffering energy absorption device combines the magnetorheological buffer with the multi-particle collision energy absorption device, and can adjust the damping force of the buffering device in real time according to the magnitude of external impact force so as to realize the optimal buffering energy absorption effect.
Description
Technical Field
The invention belongs to the technical field of buffering energy absorption, and relates to a composite buffering energy absorption device based on magnetorheological fluid.
Background
Impact is one of the main forms of movement and is a phenomenon widely existing in nature, the aim of impact research is to reduce the harmful effect of the impact, the impact strength is higher and higher along with the development of engineering equipment towards the direction of high speed and heavy load, and the problem of impact buffering is very important for improving the engineering quality. The impact refers to the motion of the system under transient excitation, and the characteristic of the impact is that the action time of the excitation is far shorter than the motion period of the system, and the impact belongs to a sudden and violent motion. The traditional buffering energy absorption device is mainly made of materials such as rubber or springs, and the like, and the buffering device has the main advantages of simple structure and low cost; the buffer device can only aim at the impact of specific load, and particularly in the occasion with higher requirement, the buffer effect is not ideal, and the application range is greatly limited. Aiming at the defects of the traditional buffer material and the buffer energy-absorbing device, the new material-based buffer energy-absorbing device is developed to provide technical accumulation for the development of the expansion buffer technology.
Disclosure of Invention
The invention aims to provide a composite buffering energy-absorbing device based on magnetorheological fluid, aiming at overcoming the defects in the prior art, and the composite buffering energy-absorbing device can adjust the damping force of the buffering device in real time according to the external impact force so as to realize the optimal buffering energy-absorbing effect.
In order to solve the technical problems, the invention adopts the technical scheme that: 1. a composite buffering energy-absorbing device based on magnetorheological fluid comprises a box body, the magnetorheological buffering device and a multi-particle collision energy-absorbing device; the method is characterized in that: the box body consists of a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagon bolt (4) and an M20 hexagon nut (5); the magnetorheological buffering device consists of an M8 straight screw (6), a right-angle fixing block (13), an M30 bolt (14) and a No. 3 magnetorheological buffer (15); the multi-particle collision energy absorption device consists of a spring connecting plate (11), an M8 straight screw (6), a No. 1 buffer spring (10), a No. 2 buffer spring (16), a collision energy absorption cavity (9), a small steel ball (8), a No. 1 magnetorheological fluid buffer (7) and a No. 2 magnetorheological fluid buffer (12);
preferably, the base (1) and the outer sleeve (2) are fixedly matched through an M20 hexagon bolt (4) and an M20 hexagon nut (5);
preferably, the outer sleeve (2) is matched with the base (1) through an M20 hexagon bolt (4) and an M20 hexagon nut (5) to protect parts in the device;
preferably, the stress plate (3) is in clearance fit with the outer sleeve (2) and is in contact with the buffer;
preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed with the base (1) through an M8 straight screw (4), and the other end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding;
preferably, the small steel ball (8) is placed in the collision energy-absorbing cavity (9), and the energy-absorbing effect is achieved through the free collision of the small steel ball (8) in the collision energy-absorbing cavity (9);
preferably, the upper end of the No. 1 buffer spring (10) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the stress plate (3), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding;
preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the stress plate (3) through an M8 straight-line screw (6), and the lower end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding;
preferably, the lower end of the No. 2 buffer spring (16) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the base (1), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding;
preferably, the right-angle fixing block (13) is fixed on the stress plate (3) through an M8 straight-line screw (6);
preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixed block (13) through an M30 bolt (14) and a nut and is fixed with the stress plate (3), and the lower end of the No. 3 magnetorheological fluid buffer is fixed with the base (1) through an M8 straight-line screw (6) and a gasket;
preferably, the No. 3 magnetorheological buffer (15) consists of a piston valve (17), an air compensation cavity (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and magnetorheological fluid (22), and is a main controllable damping force output source of the device.
The magnetic current variable damper has the advantages that the magnetic field intensity is adjusted based on changing the current of the magnet exciting coil, so that the output damping force of the magnetic current variable damper is controlled; by adopting a multi-particle collision device, the energy absorption effect can be achieved through the rigid collision of the small steel ball (8) and the collision energy absorption cavity (7); the two devices are used in parallel and combined, an adjustable damping force can be provided in the collision process, and the energy generated in the collision process is absorbed, so that the vibration damping effect is more ideal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the composite energy-absorbing buffer device;
FIG. 2 is a top view of the composite energy-absorbing buffer device;
FIG. 3 is a cross-sectional view taken along line A-A of the composite energy-absorbing bumper;
FIG. 4 is a schematic structural view of a No. 3 magnetorheological fluid buffer in the present invention;
in the figure: 1. the magnetorheological fluid damper comprises a base, 2 outer sleeves, 3 stress plates, 4M 20 hexagonal bolts, 5M 20 hexagonal nuts, 6M 8 straight-line screws, 7.1 magnetorheological fluid dampers, 8 small steel balls, 9 collision energy absorption cavities, 10.1 buffer springs, 11 spring connecting plates, 12.2 magnetorheological fluid dampers, 13 right-angle fixed blocks, 14M 30 bolts, 15.3 magnetorheological fluid dampers, 16.2 buffer springs, 17 piston valves, 18 air compensation cavities, 19 damper outer cylinders, 20 sealing rings, 21 excitation coils and 22 magnetorheological fluids.
Detailed Description
A composite buffering energy-absorbing device based on magnetorheological fluid comprises a box body, the magnetorheological buffering device and a multi-particle collision energy-absorbing device; the method is characterized in that: the box body consists of a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagon bolt (4) and an M20 hexagon nut (5); the magnetorheological buffering device consists of an M8 straight screw (6), a right-angle fixing block (13), an M30 bolt (14) and a No. 3 magnetorheological buffer (15); the multi-particle collision energy absorption device consists of a spring connecting plate (11), an M8 straight screw (6), a No. 1 buffer spring (10), a No. 2 buffer spring (16), a collision energy absorption cavity (9), a small steel ball (8), a No. 1 magnetorheological fluid buffer (7) and a No. 2 magnetorheological fluid buffer (12);
preferably, the base (1) and the outer sleeve (2) are fixedly matched through an M20 hexagon bolt (4) and an M20 hexagon nut (5);
preferably, the outer sleeve (2) is matched with the base (1) through an M20 hexagon bolt (4) and an M20 hexagon nut (5) to protect parts in the device;
preferably, the stress plate (3) is in clearance fit with the outer sleeve (2) and is in contact with the buffer;
preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed with the base (1) through an M8 straight screw (4), and the other end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding;
preferably, the small steel ball (8) is placed in the collision energy-absorbing cavity (9), and the energy-absorbing effect is achieved through the free collision of the small steel ball (8) in the collision energy-absorbing cavity (9);
preferably, the upper end of the No. 1 buffer spring (10) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the stress plate (3), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding;
preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the stress plate (3) through an M8 straight-line screw (6), and the lower end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding;
preferably, the lower end of the No. 2 buffer spring (16) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the base (1), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding;
preferably, the right-angle fixing block (13) is fixed on the stress plate (3) through an M8 straight-line screw (6);
preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixed block (13) through an M30 bolt (14) and a nut and is fixed with the stress plate (3), and the lower end of the No. 3 magnetorheological fluid buffer is fixed with the base (1) through an M8 straight-line screw (6) and a gasket;
preferably, the No. 3 magnetorheological buffer (15) consists of a piston valve (17), an air compensation cavity (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and magnetorheological fluid (22), and is a main controllable damping force output source of the device.
The specific working principle and the implementation process of the invention are as follows: the device is arranged below a required buffer, and when a stress plate (3) of the device is impacted, a No. 1 buffer spring (10) and a No. 2 buffer spring (16) are compressed to provide a buffer effect and store external energy; meanwhile, the magnet exciting coils in the magnetorheological fluid buffer No. 1 (7), the magnetorheological fluid buffer No. 2 (12) and the magnetorheological fluid buffer No. 3 (15) are electrified to generate a magnetic field, and the magnetorheological fluid in the magnetic field generates real-time adjustable yield stress to provide controllable damping force for the device; the rigid small ball (8) in the collision energy-absorbing cavity (9) collides with the cavity to absorb the energy generated when the device is impacted; the invention can adjust the current according to the external impact force, so that the magnet exciting coil generates magnetic fields with different sizes, the damping force of the magnetorheological buffer device is controlled, and meanwhile, the optimal buffering and energy absorption effects are realized by matching with the collision energy absorption device of the rigid ball (8).
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (1)
1. A composite buffering energy-absorbing device based on magnetorheological fluid comprises a box body, the magnetorheological buffering device and a multi-particle collision energy-absorbing device; the method is characterized in that: the box body consists of a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagon bolt (4) and an M20 hexagon nut (5); the magnetorheological buffering device consists of an M8 straight screw (6), a right-angle fixing block (13), an M30 bolt (14) and a No. 3 magnetorheological buffer (15); the multi-particle collision energy absorption device consists of a spring connecting plate (11), an M8 straight screw (6), a No. 1 buffer spring (10), a No. 2 buffer spring (16), a collision energy absorption cavity (9), a small steel ball (8), a No. 1 magnetorheological fluid buffer (7) and a No. 2 magnetorheological fluid buffer (12); preferably, the base (1) and the outer sleeve (2) are fixedly matched through an M20 hexagon bolt (4) and an M20 hexagon nut (5); preferably, the outer sleeve (2) is matched with the base (1) through an M20 hexagon bolt (4) and an M20 hexagon nut (5) to protect parts in the device; preferably, the stress plate (3) is in clearance fit with the outer sleeve (2) and is in contact with the buffer; preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed with the base (1) through an M8 straight screw (4), and the other end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding; preferably, the small steel ball (8) is placed in the collision energy-absorbing cavity (9), and the energy-absorbing effect is achieved through the free collision of the small steel ball (8) in the collision energy-absorbing cavity (9); preferably, the upper end of the No. 1 buffer spring (10) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the stress plate (3), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding; preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the stress plate (3) through an M8 straight-line screw (6), and the lower end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding; preferably, the lower end of the No. 2 buffer spring (16) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the base (1), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding; preferably, the right-angle fixing block (13) is fixed on the stress plate (3) through an M8 straight-line screw (6); preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixed block (13) through an M30 bolt (14) and a nut and is fixed with the stress plate (3), and the lower end of the No. 3 magnetorheological fluid buffer is fixed with the base (1) through an M8 straight-line screw (6) and a gasket; preferably, the No. 3 magnetorheological buffer (15) consists of a piston valve (17), an air compensation cavity (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and magnetorheological fluid (22), and is a main controllable damping force output source of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869295.9A CN110671462B (en) | 2019-09-10 | 2019-09-10 | Combined type buffering energy-absorbing device based on magnetorheological fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910869295.9A CN110671462B (en) | 2019-09-10 | 2019-09-10 | Combined type buffering energy-absorbing device based on magnetorheological fluid |
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| CN110671462A true CN110671462A (en) | 2020-01-10 |
| CN110671462B CN110671462B (en) | 2021-10-08 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202301728U (en) * | 2011-09-22 | 2012-07-04 | 株洲时代新材料科技股份有限公司 | Fundamental damping device and fundamental damping system |
| CN202628925U (en) * | 2012-04-17 | 2012-12-26 | 万向钱潮股份有限公司 | Gas compensation type double-barrel magneto-rheological damper |
| CN204553671U (en) * | 2015-04-20 | 2015-08-12 | 中国人民解放军装甲兵工程学院 | Double barreled MR damper |
| KR20160118201A (en) * | 2016-10-04 | 2016-10-11 | 알엠에스테크놀러지(주) | Vibration regulation digital control system |
| CN206361080U (en) * | 2016-12-30 | 2017-07-28 | 青岛科而泰环境控制技术有限公司 | Vibrating isolation system with backpressure device |
| CN206918145U (en) * | 2017-05-09 | 2018-01-23 | 武汉科技大学 | A kind of particle damps double-layer vibration isolating device |
| CN210859653U (en) * | 2019-09-10 | 2020-06-26 | 浙江师范大学 | Combined type buffering energy-absorbing device based on magnetorheological fluid |
-
2019
- 2019-09-10 CN CN201910869295.9A patent/CN110671462B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202301728U (en) * | 2011-09-22 | 2012-07-04 | 株洲时代新材料科技股份有限公司 | Fundamental damping device and fundamental damping system |
| CN202628925U (en) * | 2012-04-17 | 2012-12-26 | 万向钱潮股份有限公司 | Gas compensation type double-barrel magneto-rheological damper |
| CN204553671U (en) * | 2015-04-20 | 2015-08-12 | 中国人民解放军装甲兵工程学院 | Double barreled MR damper |
| KR20160118201A (en) * | 2016-10-04 | 2016-10-11 | 알엠에스테크놀러지(주) | Vibration regulation digital control system |
| CN206361080U (en) * | 2016-12-30 | 2017-07-28 | 青岛科而泰环境控制技术有限公司 | Vibrating isolation system with backpressure device |
| CN206918145U (en) * | 2017-05-09 | 2018-01-23 | 武汉科技大学 | A kind of particle damps double-layer vibration isolating device |
| CN210859653U (en) * | 2019-09-10 | 2020-06-26 | 浙江师范大学 | Combined type buffering energy-absorbing device based on magnetorheological fluid |
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| CN110671462B (en) | 2021-10-08 |
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