Adjustable frequency diaphragm type vibration absorber

Abstract

The invention belongs to the technical field of vibration noise control and particularly relates to a vibration absorber. According to the technical scheme of the membrane type vibration absorber with the frequency adjustable, a support rod is sequentially sleeved with flat washers, a lower layer outer washer, a lower layer membrane, a lower layer inner washer and a lower quality block, and the flat washers, the lower layer outer washer, the lower layer membrane, the lower layer inner washer and the lower quality block are fastened through a first screw. A frequency adjusting component, an upper quality block and an upper layer inner washer are sequentially arranged above the lower quality block. The lower quality block, the frequency adjusting component and the upper quality block form a quality component with the frequency adjustable. The support rod is sequentially sleeved with a support pillar and a certain number of flat washers and support pieces according to the height of the quality component. An upper layer membrane and an upper layer washer are sequentially arranged above the upper layer inner washer, and an upper layer outer washer, the upper layer membrane, the upper layer inner washer and the quality component are fastened through a second screw. The support rod is sequentially sleeved with the flat washers and a spring washer, and the flat washers and the spring washer are fastened through a nut. The membrane type vibration absorber is capable of adjusting the frequency precisely.

Description

technical field [0001] The invention belongs to the technical field of vibration and noise control, in particular to a vibration absorber. Background technique [0002] According to the analysis of the main noise sources of the ship, the line spectrum is the main factor affecting the low-frequency radiation noise, forming the acoustic fingerprint of the ship. Line spectrum management is of great significance to improve the stealth performance of ships. At present, the commonly used method for marine equipment is to apply vibration isolators, but it only affects the natural frequency of the vibration isolation device. The vibration isolation effect can only be achieved when the excitation frequency is above a multiple, and the vibration isolation ability for low-frequency strong line spectrum is limited. [0003] Installing a vibration absorber is a simple and effective method to reduce the line spectrum of mechanical equipment. The principle is to reduce the vibration of ...

AI Technical Summary

Problems solved by technology

However, the foot space of equipment on ships (especially submarines) is mostly very small. When the test finds that the line spectrum of the equipment is protruding and requires the installation of vibration absorbers, there is often not enough installation space or the vibration absorbers cannot be arranged in the optimal position.

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