Controllable type permanent magnetism magnetic suspension vibration damping spring with air damping cavity

Abstract

The invention relates to a controllable permanent magnet magnetic suspension damping spring with an air damping chamber. The damping spring comprises a pedestal, a support shaft, an casing, a rotor, a displacement sensor, a stator, a stator excitation winding and an electromagnetic controller, wherein, the pedestal has a cylindrical structure; a chamber is formed in the centre of the pedestal and used as the air damping chamber; one end of the supporting shaft is inserted in the air damping chamber; the casing is fixed to the pedestal; the rotor is arranged on the support shaft; a guide rod is arranged on the rotor; a pore path is formed on the pedestal; the displacement sensor is arranged at the port of the pore path of the pedestal and corresponds to the guide rod; the stator is arranged outside the rotor; a gap is kept between the rotor and the stator and filled with ferromagnetic material powder; the stator excitation winding is arranged on the stator; and the electromagnetic controller is electrically connected with the displacement sensor and the stator excitation winding respectively to form a closed loop control system. In the controllable permanent magnet magnetic suspension damping spring, magnetic attraction is used as elasticity, and the spring body and the damping chamber are integrated, so that the vibration damping effect is obviously improved. At the same time, the magnetic attraction, namely magnetic suspension force adopts the combination of permanent magnetic attraction and electromagnetic force, so that the magnetic suspension force can be effectively controlled according the difference of the loading, thereby improving the elasticity property of the spring.

Description

technical field [0001] The invention relates to a spring, in particular to a controllable permanent magnetic levitation vibration damping spring with an air damping cavity which adopts a permanent magnetic force plus a controllable electromagnetic force structure for vibration reduction. Background technique [0002] Known springs are generally made of spring steel wires, and are installed under an object to provide elastic support for the object. For occasions with high requirements for vibration reduction, a spring oiling chamber vibration damping pad is used. However, since the spring is in direct contact with the support, the damping effect on the object is limited. Furthermore, since the inherent characteristics of the spring are fixed, the characteristics cannot be adjusted according to the change of the applied load. [0003] The present invention uses the magnetic attraction force to form a spring, and the supporting object is placed in a magnetic levitation state t...

AI Technical Summary

Problems solved by technology

However, since the spring is in direct contact with the support, the damping effect on the object is limited

Moreover, since the inherent characteristics of the spring are fixed, its characteristics cannot be adjusted according to changes in the applied load.

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