Self-adaptive equal-stiffness dynamic vibration absorber for pipeline

Abstract

The invention relates to a self-adaptive equal-stiffness dynamic vibration absorber for a pipeline. The self-adaptive equal-stiffness dynamic vibration absorber comprises a support seat and a plurality of rectangular contact ends arranged outside the support seat in the circumferential direction, and a spring rod is fixed to each rectangular contact end; a frame is arranged at the periphery of thesupport seat, a plurality of stiffness adjustment mechanisms are installed on the frame at intervals, and each stiffness adjustment mechanism is connected with the corresponding spring rod; and an acceleration sensor is installed at the top of the support seat. The self-adaptive equal-stiffness dynamic vibration absorber further comprises a control circuit board, wherein the control circuit boardis connected with the acceleration sensor and each stiffness adjustment mechanism through a conductive wire separately. Each spring rod is connected with the corresponding stiffness adjustment mechanisms through a slide block, and automatic following for the frequency of the vibration absorber is realized through the signal transmission of the control circuit board and the acceleration sensor. The self-adaptive equal-stiffness dynamic vibration absorber disclosed by the invention is wide in frequency modulation range; the spring rods have equal-stiffness characteristic in any direction; the stiffness adjustment mechanisms for elastic rods and the elastic rods can be closely connected on the premise of realizing a self-tuning function; and the self-adaptive equal-stiffness dynamic vibration absorber is compact in structure and applicable to various places, in particular, small spaces.

Description

Technical field [0001] The invention relates to the technical field of vibration and noise control, in particular to a pipeline adaptive equal-rigidity dynamic vibration absorber. Background technique [0002] The main function of the marine pipeline dynamic vibration absorber is to control the low frequency line spectrum vibration transmitted from the mechanical equipment to the pipeline. Vibration absorbers generally control shaft frequency vibration for a fixed speed of rotating equipment. If the equipment is unstable or has multiple operating conditions, ordinary passive vibration absorbers cannot achieve the desired effect. If the vibration absorber itself can automatically adjust its own resonance frequency according to the vibration frequency of the pipeline, the above problems can be solved. This type of vibration absorber is called an adaptive vibration absorber. There are one-way or multi-directional pipeline dynamic vibration absorbers. The one-way vibration absorber ...

AI Technical Summary

Problems solved by technology

In practical applications, the adaptive multi-directional vibration absorption function can be obtained by combining multiple adaptive one-way vibration absorbers, but this solution is often difficult to apply on ships due to the small space

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