An adaptive frequency modulation dynamic vibration absorber

Abstract

The invention discloses an adaptive frequency-modulation type dynamic vibration absorber, and belongs to the technical field of vibration noise controlling. The vibration absorber comprises a stepping motor, a rotary table, a connecting rod, a guiding rod, an adjusting mass block, a fixed mass block, a stepping motor controlling system, an elastic element, a wiring terminal, a top plate, a bottom plate, a wiring terminal, a linear bearing, a hinge pin, a nut and a shell, wherein the rotary table, the connecting rod, the guiding rod and the linear bearing inlaid in the shell form a connecting rod system; the turning direction and the step size of the stepping motor are controlled by the stepping motor controlling system; the rotary table is driven to rotate; the rotary table rotates to drive the connecting rod system to work so that the guiding rod upwards moves on the linear bearing; the length of the guiding rod is adjusted; the rigidity of the vibration absorber is changed; and the purpose of modulating frequency is achieved. The change of the revolving speed of a controlled object can be automatically tracked; the frequency of the vibration absorber is automatically modulated; and the vibration absorbing effect of controlled equipment is ensured under variable working conditions or during revolving speed drifting.

Description

technical field [0001] The invention relates to a dynamic vibration absorber, which belongs to the technical field of vibration and noise control. Background technique [0002] At present, vibration and noise reduction has been widely concerned and valued. Many vibration reduction measures have been taken to reduce the vibration and noise of rotating equipment, and a certain control effect has been achieved. However, it is found from the measured data that there are still strong line spectra, and the dynamic Or eliminate the effective means of line spectrum, so it has been extensively studied at home and abroad, and has also been widely used. [0003] In order to achieve the best vibration absorption effect, the dynamic vibration absorber needs to meet the design frequency of the vibration absorber and the frequency of the controlled strong line spectrum. When the design frequency of the vibration absorber deviates from the frequency of the controlled line spectrum, the vibr...

AI Technical Summary

Problems solved by technology

[0005] However, it will bring electromagnetic interference problems and need to provide large power supply equipment. The auxiliary equipment is complex and the electromagnetic stiffness is prone to nonlinearity, so the control is more difficult.

Does not meet the simple structure and reliability requirements of frequency modulation

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