Multilevel vibration-attenuation multilayer sound insulation structure

Abstract

The invention relates to a multilevel vibration-attenuation multilayer sound insulation structure. The structure comprises a vibratory noise source, a multilevel vibration-attenuation buffer structure, a sound insulation device and the like. A vibratory noise source (1) is flexibly connected with a primary vibration-attenuation support plate (3) through a vibration-attenuation rubber (2), rhe primary vibration-attenuation support plate (3) is flexibly connected with a secondary vibration-attenuation support plate (5) through a vibration-attenuation rubber (4), and the secondary vibration-attenuation support plate (5) is flexibly connected with a shell noise enclosure (7) through a vibration-attenuation rubber (6). An installation base (8) is flexibly connected with the secondary vibration-attenuation support plate (5) through the vibration-attenuation rubber (9), or is flexibly connected with a shell coaming (7) through the vibration-attenuation rubber (9), and an inner sound insulation cover (10) is arranged on the vibration-attenuation support plate. A sound insulation material is arranged on the surfaces of the shell coaming (7) and the inner sound insulation cover (10), and certain gaps are formed between the surfaces of the shell coaming (7) and the inner sound insulation cover (10). According to the structure, vibration attenuation and noise reduction can be effectively realized.

Description

technical field [0001] The invention belongs to the field of noise and vibration, in particular to a vibration and noise reduction system for a water source heat pump air conditioner. Background technique [0002] The vibration reduction system of the original water source heat pump unit uses at most two stages, and the sound insulation adopts a single layer. Since the unit is installed indoors, the noise should be particularly low. In addition, the low-frequency noise has a particularly strong penetrating ability, so reducing low-frequency noise is an important indicator of the water source heat pump unit. [0003] In the original two-stage vibration damping mechanism, each level of vibration damping structure is installed on the support plate. Due to the small number of vibration damping stages, the vibration source is directly transmitted to the support plate through the rubber, and the support plate is transmitted to the shell enclosure through the vibration damping rubb...

AI Technical Summary

Problems solved by technology

Because the single-layer sound insulation is too thin, the sound is easy to pass through. In addition, because the noise will be reflected when it hits the sound insulation board, and at the same time, part of the vibration from the vibration source will be transmitted, the vibration of the sound insulation board will increase, and the vibration will generate low-frequency noise. Therefore, Emitted low-frequency noise is amplified

The double-layer foam sound insulation board is because the two layers of boards are fixed together, and the two layers of boards vibrate together. Although the sound insulation effect of high-frequency noise is better, the sound insulation effect of low-frequency noise is poor.

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