AU2020100593A4 - An Improved Electromagnetic Flutter Impact Damper - Google Patents

An Improved Electromagnetic Flutter Impact Damper Download PDF

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Publication number
AU2020100593A4
AU2020100593A4 AU2020100593A AU2020100593A AU2020100593A4 AU 2020100593 A4 AU2020100593 A4 AU 2020100593A4 AU 2020100593 A AU2020100593 A AU 2020100593A AU 2020100593 A AU2020100593 A AU 2020100593A AU 2020100593 A4 AU2020100593 A4 AU 2020100593A4
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AU
Australia
Prior art keywords
receiving part
cavity
impactor
hemisphere
impact damper
Prior art date
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Ceased
Application number
AU2020100593A
Inventor
Yanchen DU
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University of Shanghai for Science and Technology
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University of Shanghai for Science and Technology
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Publication date
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Priority to AU2020100593A priority Critical patent/AU2020100593A4/en
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Publication of AU2020100593A4 publication Critical patent/AU2020100593A4/en
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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
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
    • 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
    • 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
    • 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
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • 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
    • 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
    • F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members

Abstract

Abstract The invention discloses an improved electromagnetic flutter impact damper, which includes a receiving part, an electromagnetic end cover, a side wall, a bump, and a cavity. The cavity and the receiving part are interconnected, and a spherical structure is also placed inside the receiving part. The impactor includes two hemispheres, a bearing is connected to the outside of the hemisphere, a first link is inserted into the inner ring of the bearing, and a first runner is movably connected to the outside of the first link. The wheel is located in the cavity, and convex edges are connected to the outside of the plane of the hemisphere.The convex edges of the two hemispheres are connected to each other by a plurality of fixed bolts arranged in a ring shape. A rubber block is also connected to the bottom of the hemisphere through the support rod. An inner cavity is also provided with an annular cavity, and a plurality of balls are placed inside the annular cavity. The invention can improve the shortcomings of the prior art, its momentum exchange and energy conversion are more sufficient, and it has better vibration damping performance. Drawings \2 \4 \3\5 \62 Fig. 1 Fig. 2

Description

An Improved Electromagnetic Flutter Impact Damper
Technical Field
The invention relates to an impact damper, in particular to an improved electromagnetic flutter impact damper.
Background Technology
An impact damper is a type of passive control. Impact damping uses the collision of the free mass (impacter) with the main system during vibration to control the response of the main system. Because of its simple structure, convenient use, low cost, passive structure, it can be used in extreme environment and can achieve better damping effect. Therefore, due to the rapid development of collision dampers in recent years, it has been widely used in vibration control in the fields of machine tools, robots, turbine machinery, aircraft, automobiles, spaceships and high-rise buildings. Therefore, in recent years, due to the rapid development of impact dampers, they have been widely used in vibration control of machine tools, robots, turbine machinery, aircraft, automobiles, spacecraft and high-rise buildings. The inventor applied for a Chinese invention patent CN 105221620A in 15 years. The collision damper of this structure includes an impactor, a receiving part, and an electromagnetic end cap. The magnetic force difference is used to make the impactor collide with the main system multiple times in a cycle , thereby strengthening the two energy consumption mechanisms of momentum exchange and plastic deformation. However, after further research and experiments by the inventors in recent years, it has been found that the spherical impactor will produce a lot of invalid collision actions in the receiving part, thereby limiting its scope of application.
Invention Summary
The technical problem to be solved by the present invention is to provide an improved electromagnetic flutter impact damper, which can solve the shortcomings of the prior art, which has more sufficient momentum exchange and energy conversion, and has better vibration reduction performance.
An improved electromagnetic flutter impact damper includes a receiving part, the left and right ends of the receiving part are respectively provided with electromagnetic end caps, the front and rear sides of the receiving part are respectively connected to a side wall and the outer side of the side wall is connected to a bump. A cavity is provided on the inner side of the bump, the cavity is interconnected with the receiving part. An impactor with a spherical structure is also placed inside the receiving part. The impactor includes two hemispheres, and a bearing is connected to the outside of the hemisphere. A first link is inserted into the inner ring of the bearing. A first runner is movably connected to the outside of the first link, the first runner 40 is located in the cavity. A convex edge is connected to the outside of the plane of the hemisphere. The convex edges of the two hemispheres are connected to each other by a plurality of annularly arranged fixing bolts. A ring-shaped rubber ring is fixedly connected to the outer side of the convex edge. The rubber ring is coaxial with the first connecting rod, and a rubber block is connected to the bottom of the receiving part through a support rod. The top surface of the rubber block is selectively connected to the bottom surface of 45 the rubber ring. An annular cavity is also provided in the interior of the hemisphere, and a plurality of balls are placed in the annular cavity.
Preferably, the inside of the annular cavity is further filled with oil.
Preferably, the support rod includes a tube body, and an insertion rod is inserted inside the tube body, and a spring is connected between the insertion rod and the tube body.
Preferably, an oil cup is further penetratingly connected above the bump.
2020100593 17 Apr 2020
To solve the above technical problems, the technical solutions adopted by the present invention are as follows.
The beneficial effect brought by adopting the above technical solution is that the working principle of the electromagnetic end cap and the impactor of the impact damper is consistent with the previous application. The magnetic force difference is used to cause the impactor to collide with the main system multiple times in one period, thus strengthening the energy dissipation mechanism of momentum exchange and plastic deformation, which is different from the previous application.The impactor of the present invention, in order to limit the impactor to the interior of the receiving part by interconnecting two bearings with the first connecting rod, and through the position relationship between the first runner outside the first connecting rod and the cavity, so that the impactor is suspended as a whole and can only be moved around the inner part of the receiving part. In this case, the impactor will only collide with the electromagnetic end caps at both ends, and there will be no impact between the impactor itself and the top of the receiving part or the side wall , thereby ensuring that the impact action is all effective and the momentum exchange is more efficient. The impactor consists of two hemispheres , which are fixed by a convex edge and several fixed bolts to form a complete sphere.When the system produces an impact action and the impactor begins to move to one side, the rubber ring on the outside of the impactor will create contact and friction with the rubber block connected through the support rod during the movement, and enable the impactor to generate its own rotation with the first link as the axis , so that it can absorb and exchange a certain amount of kinetic energy and momentum. With the left and right swing of the impactor, the rubber ring will produce multiple contact and friction with the rubber block, making the impactor intermittently positive or reverse, converting part of the energy into the internal energy of friction, and accelerating momentum exchange. Further, as the impactor rotates, a plurality of balls in the inner annular cavity will also generate a sliding action to further exchange kinetic energy and momentum. During the repeated forward rotation or reverse rotation of the impactor itself, the friction between the ball and the annular cavity and the mutual collision of the balls will further increase the momentum conversion efficiency and energy dissipation capacity of the damper. The interior of the annular cavity is also filled with oil. The oil inside the annular cavity can increase the resistance of the ball movement, and can prevent the ball from wearing seriously. The support rod includes a tube body. The structure of the support rod is composed of the insertion of the pipe body and the insertion rod, which makes the support rod has a certain elasticity and contraction characteristics, and it can prevent the rigid collision between the rubber ring and the rubber block. The oil cup above the bump can input a certain amount of lubricating oil into cavity, which can further reduce the running resistance of impactor and improve momentum exchange efficiency.
Description with Drawings
Figture 1 is a top structural view of a specific embodiment of the present invention.
Figture 2 is a view along direction A of Figture 1 in a specific embodiment of the present invention.
Figture 3 is a structural diagram of an impactor in a specific embodiment of the present invention.
Figture 4 is a structural diagram of a hemisphere in a specific embodiment of the present invention.
Figture 5 is a structural diagram of a support rod in a specific embodiment of the present invention.
In the picture: 1. Electromagnetic end cap; 2. Receiving part; 3. Bump; 4. First connecting rod; 5. Impactor; 6. Side wall; 7. Cavity; 8. First runner; 9. Support rod; 10. Rubber block; 11. Hemispherical body; 12. Bearing; 13. Oil cup; 14. Rubber ring; 15. Insert rod; 16. Fixing bolt; 17. Convex edge; 18. Annular 50 cavity; 19. Ball; 20. Second link; 21. Second runner; 22. Tube body; 23. Spring.
Detailed Description of the Presently Preferred Embodiment
2020100593 17 Apr 2020
The standard parts used in the present invention can be purchased from the market. The special-shaped parts can be customized according to the specification and the records of the drawings. The specific connection method of each part adopts conventional methods such as bolts, rivets, welding, and pasting in the prior art, which are not described in detail here.
Referring to Figures 1-5, a specific embodiment of the present invention includes a receiving part 2, the left and right ends of the receiving part 2 are respectively provided with electromagnetic end caps 1, the front and rear sides of the receiving part 2 are respectively connected to a side wall 6 and the outer side of the side wall 6 is connected to a bump 3. A cavity 7 is provided on the inner side of the bump 3; the cavity 7 is interconnected with the receiving part 2. An impactor 5 with a spherical structure is also placed inside the receiving part 2. The impactor 5 includes two hemispheres 11, and a bearing 12 is connected to the outside of the hemisphere 11. A first link 4 is inserted into the inner ring of the bearing 12. A first runner 8 is movably connected to the outside of the first link 4, the first runner 8 is located in the cavity 7. A convex edge 17 is connected to the outside of the plane of the hemisphere 11. The convex edges 17 of the two hemispheres Hare connected to each other by a plurality of annularly arranged fixing bolts 16. A ring-shaped robber ring 14 is fixedly connected to the outer side of the convex edge 17. The robber ring 14 is coaxial with the first connecting rod 4, and a robber block 10 is connected to the bottom of the receiving part 2 through a support rod 9. The top surface of the rubber block 10 is selectively connected to the bottom surface of the rubber ring 14. An annular cavity 18 is also provided in the interior of the hemisphere 11, and a plurality of balls 19 are placed in the annular cavity 18. In the impact damper of the present invention,the working principle of the electromagnetic end cap 1 and the impactor 5 of the impact damper is consistent with the previous application. The magnetic force difference is used to cause the impactor 5 to collide with the main system multiple times in one period, thus strengthening the energy dissipation mechanism of momentum exchange and plastic deformation, which is different from the previous application.The impactor 5 of the present invention, in order to limit the impactor 5 to the interior of the receiving part 2 by interconnecting two bearings 12 with the first connecting rod 4, and through the position relationship between the first runner 8 outside the first connecting rod 4 and the cavity 7, so that the impactor 5 is suspended as a whole and can only be moved around the inner part of the receiving part 2 . In this case, the impactor 5 will only collide with the electromagnetic end caps at both ends, and there will be no impact between the impactor 5 itself and the top of the receiving part 2 or the side wall 6 , thereby ensuring that the impact action is all effective and the momentum exchange is more efficient. The impactor 5 consists of two hemispheres 11, which are fixed by a convex edge 17 and several fixed bolts 16 to form a complete sphere. When the system produces an impact action and the impactor 5 begins to move to one side, the rubber ring 14 on the outside of the impactor 5 will create contact and friction with the rubber block 10 connected through the support rod 9 during the movement, and enable the impactor 5 to generate its own rotation with the first link 4 as the axis , so that ft can absorb and exchange a certain amount of kinetic energy and momentum. With the left and right swing of the impactor 5, the robber ring 14 will produce multiple contact and friction with the rubber block 10, making the impactor 5 intermittently positive or reverse, converting part of the energy into the internal energy of friction, and accelerating momentum exchange. Further, as the impactor 5 rotates, a plurality of balls 19 in the inner annular cavity 18 will also generate a sliding action to further exchange kinetic energy and momentum. During the repeated forward rotation or reverse rotation of the impactor 5 itself, the friction between the ball 19 and the annular cavity 18 and the mutual collision of the balls 19 will further increase the momentum conversion efficiency and energy dissipation capacity of the damper. The interior of the annular cavity 18 is also filled with oil. The oil inside the annular cavity 18 can increase the resistance of the ball movement, and can prevent the ball from wearing seriously. The support rod 9 includes a tube body 22. An insertion rod 15 is inserted into the tube body 22. A spring 23 is connected between the insertion rod 15 and the tube body 22. The structure of the support rod 9 is composed of the
2020100593 17 Apr 2020 insertion of the pipe body 22 and the insertion rod 15, which makes the support rod 9 has a certain elasticity and contraction characteristics, and it can prevent the rigid collision between the rubber ring and the rubber block 10. An oil cup 13 is also penetratingly connected above the bump 3. The oil cup 13 above the bump 3 can input a certain amount of lubricating oil into cavity 7, which can further reduce the running resistance of impactor 5 and improve momentum exchange efficiency.
In addition, in order to further enhance the momentum exchange and improve the energy conversion effect, the left and right sides of the inside of the accommodating portion 2 are also connected with a second link 20. A second runner 21 is axially connected to the second link 20. The second runner 21 is selectively connected to the rubber ring 14. With the above structure, when the impactor 5 approaches the electromagnetic end cover 1 in motion, it will not directly collide with the electromagnetic end cover 1, but will first collide with the second runner 21, during the collision, the second runner 21 will be connected with the rotating rubber ring 14 and drive the second runner 21 to rotate, so as to realize a part of the momentum exchange. Because the action is to drive the second runner 21 to rotate by friction, a part of the kinetic energy is also converted into internal energy, and a certain energy conversion effect can also be achieved.
In the description of the present invention, it should be understood that the azimuth or position relationship indicated by the terms longitudinal transverse upper lower front rear left right vertical horizontal top bottom interior outer , etc. is based on the orientations or positional relationships shown in the drawings. It is simply to facilitate the description of the invention, and not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated at a specific orientation, therefore, it can not be understood as a limitation to the invention.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. The technical personnel in the field should understand that the invention is not limited by the foregoing embodiments. What is described in the above embodiments and the description is only to explain the principle of the present invention. The present invention will also have the following without departing from the spirit and scope of the present invention. Various changes and improvements fall within the scope of the claimed invention. The claimed scope of the invention is defined by the appended claims and their equivalents.

Claims (4)

  1. Claims
    2020100593 17 Apr 2020
    1. An improved electromagnetic flutter impact damper comprises a receiving part (2), the left and right ends of the receiving part (2) are respectively provided with electromagnetic end caps (1), characterized in that the front and rear sides of the receiving part (2) are respectively connected to a side wall (6) and the outer side of the side wall (6) is connected to a bump (3). A cavity (7) is provided on the inner side of the bump (3), the cavity (7) is interconnected with the receiving part (2). An impactor (5) with a spherical structure is also placed inside the receiving part (2). The impactor (5) includes two hemispheres (11), and a bearing (12) is connected to the outside of the hemisphere (11). A first link (4) is inserted into the inner ring of the bearing (12). A first runner (8) is movably connected to the outside of the first link (4), the first runner (8) is located in the cavity (7). A convex edge (17) is connected to the outside of the plane of the hemisphere (11). The convex edges (17) of the two hemispheres (11) are connected to each other by a plurality of annularly arranged fixing bolts (16). A ring-shaped rubber ring (14) is fixedly connected to the outer side of the convex edge (17). The rubber ring (14) is coaxial with the first connecting rod (4), and a rubber block (10) is connected to the bottom of the receiving part (2) through a support rod (9). The top surface of the rubber block (10) is selectively connected to the bottom surface of the rubber ring (14). An annular cavity (18) is also provided in the interior of the hemisphere (11), and a plurality of balls (19) are placed in the annular cavity (18).
  2. 2. The improved electromagnetic flutter impact damper according to claim 1, characterized in that the inside of the annular cavity (18) is further filled with oil.
  3. 3. The improved electromagnetic flutter impact damper according to claim 1, characterized in that the support rod (9) comprises a pipe body (22), an insertion rod (15) is inserted into the tube body (22), and a spring (23) is connected between the insertion rod (15) and the tube body (22).
  4. 4. The improved electromagnetic flutter impact damper according to claim 1, characterized in that an oil cup (13) is further penetratingly connected above the bump (3).
AU2020100593A 2020-04-17 2020-04-17 An Improved Electromagnetic Flutter Impact Damper Ceased AU2020100593A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2020100593A AU2020100593A4 (en) 2020-04-17 2020-04-17 An Improved Electromagnetic Flutter Impact Damper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2020100593A AU2020100593A4 (en) 2020-04-17 2020-04-17 An Improved Electromagnetic Flutter Impact Damper

Publications (1)

Publication Number Publication Date
AU2020100593A4 true AU2020100593A4 (en) 2020-05-28

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AU2020100593A Ceased AU2020100593A4 (en) 2020-04-17 2020-04-17 An Improved Electromagnetic Flutter Impact Damper

Country Status (1)

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