A Dynamic Vibration Absorber for Rotor System Using Nonlinear Energy Sink Mechanism

Abstract

The invention discloses a dynamic vibration absorber for a rotor system that utilizes a nonlinear energy trap mechanism, which includes a vibration absorber body and a support component fixing device. The vibration absorber body includes support components, connecting components and vibration absorber mass blocks. The support component includes bearings, supports and bushings; the connection component includes nuts, connecting rods and segmented linear rods. The segmented linear rods constitute segmented linear stiffness and fit nonlinear cubic stiffness; there are connecting holes and gaps on the vibration absorber mass block holes to form a fit with the connecting component. The gap fit between the absorber mass block and the segmented linear rod constitutes a nonlinear energy trap mechanism. Support component fixing devices include bolts, fixing brackets, springs and connecting pieces. The invention can effectively suppress the wide-band vibration of the rotor system and belongs to the field of vibration and noise control. The overall structure is compact, the additional mass is small, the reliability is high, the use is convenient, and no external energy is required.

Description

technical field [0001] The invention relates to the technical field of vibration and noise control, in particular to a dynamic vibration absorber for a rotor system using a nonlinear energy sink mechanism, which is used for vibration suppression of the rotor system, a core component of a rotating machine. Background technique [0002] Vibration is a typical hazard for the safe operation of rotating machinery, and excessive vibration can cause serious damage to rotating machinery. Rotating machinery is often used as the core equipment in the national industrial field, and it often generates vibration due to unbalance and other reasons. Especially for multi-span rotors, its working speed is usually above the first-order critical speed, and it must pass through the critical speed during the start and stop stages. At this time Strong resonance will occur, seriously affecting the stable operation of the unit. With the continuous efforts of the "2025 Plan" of the national equipme...

AI Technical Summary

Problems solved by technology

[0004] At present, passive vibration absorbers are widely used in the field of vibration suppression of rotating machinery. Although they have the characteristics of simple structure and no energy source, their practical application is limited due to the narrow frequency band of vibration suppression; although active vibration absorbers It has the advantages of high control precision and sensitive response, but its structure is too complicated, which reduces its applicability

[0005] As mentioned earlier, passive vibration absorbers have a narrow frequency range for effective vibration suppression, while active or semi-active vibration absorbers have a rather complex structure

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