Abstract
The impact noise of the valve components of the rotary compressor cannot be ignored. This paper conducts an experimental study on the internal friction of five damping alloys, and start from the internal friction and stiffness of the damping alloy, Fe-16Cr-2.5Mo damping alloy is selected as the rotary compressor valve seat and valve lift guard, then through the method of combining theory and experiment to study its noise reduction effect. It is found that the application of Fe-16Cr-2.5Mo damping alloy on the valve seat has a greater effect on the vibration and noise of the compressor than on the valve lift guard. When it is used on the valve seat, as the speed increases in the X direction, the noise reduction effect is more obvious under the low temperature heating condition of the compressor, and the Y direction always has 5-8dB drop in the 800-2500Hz frequency band. This shows that compared with the traditional gray iron valve seat, the damping alloy valve seat has a more obvious noise reduction effect as the flapping frequency of the valve plate increases. However, when the valve lift guard uses Fe-16Cr-2.5Mo damping alloy, the noise improvement of the compressor is not obvious. Through the research of this paper, a new direction is provided for rotary compressor vibration and noise reduction.
Published Version
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