A frequency-adjustable broadband dynamic vibration absorber and vibration-absorbing method thereof

Abstract

The invention discloses a frequency-adjustable broadband dynamic vibration absorber and a vibration absorbing method thereof. The vibration absorber comprises a base, a threaded rod perpendicularly installed on the base, a fixed vibration absorbing unit, at least one set of movable vibration absorbing units, nuts and a sliding metal plate; the fixed vibration absorbing unit comprises a fixed mass block and a fixed rubber block which are in vulcanization connection; each set of movable vibration absorbing unit comprises a movable mass block and a movable rubber block placed below the movable mass block; a rubber damping plate is arranged on the upper surface of the movable mass block located on the uppermost portion; the nuts are installed on the threaded rod through threads so that the all the rubber blocks and the all the mass blocks can be fixedly installed on the base in the axial direction; and the sliding metal plate is installed on the threaded rod in a sliding manner through a sleeve. The frequency-adjustable broadband dynamic vibration absorber is suitable for solving the abnormal vibration problem of a system or parts and is also suitable for the problem verification work in the vibration diagnosis process, the using range of the vibration absorber is widened, and the work efficiency is improved.

Description

technical field [0001] The invention relates to a vibration and noise reduction device, in particular to a frequency-adjustable broadband dynamic vibration absorber and a vibration-absorbing method thereof. etc.) for a quick fix. Background technique [0002] Mechanical vibration will not only reduce the performance and reliability of the machine itself, but also cause damage to the human body, and it is also the cause of noise pollution. The vibration problem is largely caused by the insufficient damping of the mechanical structure. As a countermeasure, various dampers have been studied, the representative of which is the dynamic vibration absorber. [0003] The dynamic vibration absorber is mainly composed of auxiliary mass, spring and damping. The various dynamic vibration absorbers currently used are mainly divided into the following two categories: 1. Generally, it is composed of a mass block and a rubber block. The disadvantage of this type of vibration absorber is th...

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Problems solved by technology

[0003] The dynamic vibration absorber is mainly composed of auxiliary mass, spring and damping. The various dynamic vibration absorbers currently used are mainly divided into the following two categories: 1. Generally, it is composed of a mass block and a rubber block. The disadvantage of this type of vibration absorber is that the vibration absorption frequency Single, can only solve the vibration caused by the resonance of a single mode of the structure; 2. Generally, it is composed of multiple mass blocks and multiple rubber blocks. The resonance of the main system can only be solved for the specific mode resonance problem of the structure. It has a single purpose and cannot quickly debug and identify the resonance problem according to the actual situation. It cannot flexibly adjust its own spring stiffness K and mass M, and it cannot add damping materials to enhance vibration absorption. damping characteristics

[0004] In summary, the existing vibration absorbers have the following defects: single frequency, narrow resonance frequency band, single effective way to adjust the frequency of the vibration absorber, which is easy to cause resonance of the main system, and the current dynamic vibration absorber cannot flexibly adjust its own spring stiffness K and mass M, It can only solve the resonance problem of a single structure or a fixed mode, and has a single purpose

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