Broadband dynamic vibration absorber

Abstract

A broadband dynamic vibration absorber comprises a base, a basic vibration absorbing unit and n sets of vibration absorbing assemblies, wherein the structures and the sizes of the n sets of vibration absorbing assemblies are the same, and the boundary dimensions of the n sets of vibration absorbing assemblies gradually become small. The basic vibration absorbing unit and each set of vibration absorbing assemblies are respectively formed by a mass block and a rubber block connected to the bottom of the mass block. The mass block of each vibration absorbing assembly is of a cup-shaped structure, the n sets of vibration absorbing assemblies are arranged into a whole from small to large in a sleeved mode to be connected with the basic vibration absorbing unit and the base, namely, the front set of vibration absorbing assembly is arranged in the mass block of the next set of vibration absorbing assembly in a sleeved mode, the basic vibration absorbing unit is arranged in the mass block of vibration absorbing assembly in the innermost layer in a sleeved mode, the end faces of the mass blocks are on the same plane, the horizontal distance D is reserved between every two adjacent mass blocks, and the n is an integer between 2 and 6. The broadband dynamic vibration absorber is compact in structure, scientific in design, convenient to install, high in vibration reducing efficiency and low in cost. The appearance of the broadband dynamic vibration absorber can be manufactured at random according to the appearance of a main system, and the broadband dynamic vibration absorber can be widely applied to various gasoline vehicles, diesel vehicles and mechanical devices.

Description

technical field [0001] The invention relates to a noise reduction and vibration reduction device, in particular to a broadband dynamic vibration absorber for locomotives and mechanical equipment. Background technique [0002] In order to solve the vibration noise generated during the operation of locomotives and mechanical equipment, dynamic vibration absorbers are widely used. Currently, dynamic vibration absorbers used in various locomotives and mechanical equipment are generally composed of a mass block and a rubber block. This type of dynamic vibration absorber exists The following deficiencies: [0003] 1. The vibration absorption frequency is single, which can only solve the vibration noise caused by the single mode resonance of the structure; [0004] 2. In order to overcome the vibration noise generated by the main system when multi-order modal resonance occurs under external variable vibration excitation, it is often necessary to use multiple dynamic vibration abso...

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Problems solved by technology

[0003]1. The vibration absorption frequency is single, which can only solve the vibration noise caused by the single mode resonance of the structure;

[0004]2. In order to overcome the vibration noise generated by the multi-order modal resonance of the main system under external variable vibration excitation, it is often necessary to use multiple dynamic vibration absorbers, lead to increased costs

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