Magnetic levitation dynamic vibration absorber, vibration absorption system and working method thereof

Abstract

The invention discloses a magnetic suspension dynamic vibration absorber as well as a vibration absorption system and a working method of the magnetic suspension dynamic vibration absorber, and relates to the technical field of a vibration absorption device and magnetic suspension. Vibration absorption elements of the magnetic suspension dynamic vibration absorber comprise magnetic suspension vibration absorption elements which have the same structure and are uniformly distributed around a rotary shaft (3), wherein each group of the magnetic suspension vibration absorption elements comprises an electromagnet and a displacement sensor (4). Rigidity and damping are provided between the magnetic suspension vibration absorption elements and the rotary shaft (3); the rigidity and the damping are changed by changing current size through parameters of a controller (6), so that fixed frequency of the magnetic suspension dynamic vibration absorber is changed, and the dynamic vibration absorption effect is realized.

Description

Technical field [0001] The patent of the present invention relates to the field of vibration absorption device technology and magnetic suspension technology, in particular to a magnetic suspension dynamic vibration absorber and its vibration absorption system and working method. Background technique [0002] In the rotor vibration control, Zhang Bingkang et al. designed a bisected annular dynamic vibration absorber based on a single-disk rotor model in the document "Experiment of Rotor Vibration Control by Ring Dynamic Vibration Absorber". The vibration absorber is installed at any position within the two supporting spans of the rotor through the bearing, without changing the dynamic characteristics of the rotor system. [0003] The vibration absorber is mainly composed of a connecting unit, a mass unit, a stiffness (spring) unit and a damping unit. The connecting unit includes a bearing and an inner ring. The bearing adopts a thimble rolling bearing with axial positioning. The inn...

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Problems solved by technology

[0005] However, the traditional dynamic vibration absorber is a purely mechanical device, which can only absorb vibration passively, and the unbalanced force of the rotor changes with its speed, which requires that the parameters of the dynamic vibration absorber can be adjusted with the change of the vibration situation, so the traditional dynamic vibration absorber device can no longer meet the needs

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