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Eddy current energy consumption damper for suppressing axial vibration

An axial vibration and eddy current technology, applied in springs/shock absorbers, springs, magnetic springs, etc., can solve problems such as inapplicability to spacecraft, and achieve the effect of good time stability and large damping ratio

Inactive Publication Date: 2012-11-14
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Clearly existing eddy current dampers are not suitable for spacecraft needs

Method used

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  • Eddy current energy consumption damper for suppressing axial vibration
  • Eddy current energy consumption damper for suppressing axial vibration
  • Eddy current energy consumption damper for suppressing axial vibration

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Embodiment Construction

[0044] In the following description, the present invention will be described in detail based on exemplary embodiments.

[0045] Note that the same reference numerals are used for the same elements and descriptions are not repeated.

[0046] Such as Figure 1a As shown in and b, when the vibration is input, the metal plate unit inside the damper is driven to cut the magnetic field generated by the permanent magnet, so an eddy current is generated on the surface of the metal plate unit, and the direction of the eddy current conforms to Fleming's right-hand rule.

[0047] Such as figure 2 As shown, when the magnetic field where the conductor is located changes alternately in its moving direction, a corresponding number of eddy currents will be formed inside it. Compared with the structural scheme with a single magnetic field direction, the array scheme will generate a larger electric current. Eddy current, and then output greater damping force, with better damping performance. ...

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Abstract

The invention discloses an eddy current energy consumption damper for suppressing axial vibration. The eddy current energy consumption damper consists of an eddy current energy consumption unit, a magnetic buffer unit, an electromagnetic shielding case and a connecting part, wherein the eddy current energy consumption unit and the magnetic buffer unit are respectively distributed at two ends of the damper; an eddy current barrel in the eddy current energy consumption unit is inserted into a magnetic field between inner and outer permanent magnets of the eddy current energy consumption unit, and the top end of the eddy current barrel is connected with one end of the connecting part and is used for connecting an external load; the other end of the eddy current barrel is connected with a movable permanent magnet in the magnetic buffer unit at the bottom; the bottom of the damper is provided with the magnetic buffer unit which consists of a movable permanent magnet and a fixed permanent magnet which have the opposite polarity directions; the movable permanent magnet on the upper part is fixedly connected with the tail end of the eddy current barrel and moves along with the eddy current barrel; and the other fixed permanent magnet is fixed at the bottom of the damper. The eddy current energy consumption damper has the characteristics of simple structure, no contact, long service life, high rigidity, controllable damping and the like, a working medium is not required, and the current energy consumption damper has high application value in the technical field of structural vibration control.

Description

technical field [0001] The invention belongs to the technical field of structural vibration control, in particular to an eddy current energy dissipation damper for suppressing axial vibration, and the device can suppress the axial vibration of the structure. technical background [0002] Vibration problems are common in many engineering fields such as aviation, aerospace, machinery, civil engineering, and the environment, which can cause noise, facility fatigue, and other hazards. Effectively controlling vibration and reducing the harm caused by vibration have always been the research focus of engineers and technicians. Research on structural vibration control began in mechanical engineering as early as the 20th century, and then developed into aerospace engineering. [0003] The traditional structural vibration reduction method is to resist external excitation by enhancing the anti-vibration performance (strength, stiffness) ductility of the structure itself, that is, the ...

Claims

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Application Information

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IPC IPC(8): F16F6/00E04B1/98
Inventor 何田肖登红刘献栋单颖春
Owner BEIHANG UNIV
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