Prediction and tests for vibration and noise of exhaust valve plate of rotary vane compressor based on fluid-structure interaction

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (19) : 266-273.

LUO Shengxi1, HE Zeyin1,2, TAO Ping’an2, LIU Hongmei2, HU Lizhi2, SUN Shizheng1

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Abstract

In order to reveal the vibration characteristics of the reed valve plate of rotary vane compressor, a single-particle model of the valve plate was established, and the relationship between the exhaust condition, geometric parameters and the vibration displacement of the valve plate was studied; Then, the fluid structure interaction model of the improved valve plate exhaust structure is established to study the flow characteristics of the valve plate; Then, based on the turbulence parameters of the flow field, the broadband noise model of the reed valve is established, and the noise distribution law of the improved valve is studied. The results show that: by improving the valve parameters, the flat sticking time is effectively increased, and the peak to peak vibration velocity of the valve is reduced; There is a negative pressure area in the flow field of the degassing slot when the valve is working, and there is a backflow phenomenon in the flow field of the exhaust hole when the valve is closed; The aerodynamic noise sources of the exhaust structure are mainly concentrated on the surface where the valve plate collides with the valve seat and near the degassing groove; After the improvement, the noise reduction of the compressor in the frequency domain is obviously reduced, and the maximum noise amplitude of the rear field point is reduced by 6%.
Key words: rotary vane compressor; reed valve; single-particle model; fluid structure interaction; exhaust noise

Key words

rotary vane compressor / reed valve / single-particle model / fluid structure interaction / exhaust noise

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LUO Shengxi1, HE Zeyin1,2, TAO Ping’an2, LIU Hongmei2, HU Lizhi2, SUN Shizheng1. Prediction and tests for vibration and noise of exhaust valve plate of rotary vane compressor based on fluid-structure interaction[J]. Journal of Vibration and Shock, 2022, 41(19): 266-273

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