电动制冷剂涡旋式压缩机声学实验研究

L. Saur, Stefan Becker
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引用次数: 0

摘要

在电动汽车中,辅助装置可能是噪音的主要来源,制冷剂涡旋压缩机就是其中之一。与内燃机汽车相比,电动汽车需要更大的制冷剂压缩机,因为除了内饰,电池和电动马达也必须冷却。压缩机通过压力脉动和振动传播以及直接发出空气声,对其他制冷电路部件和底盘产生声激励。为了研究工作条件对电动涡旋压缩机声学的影响,我们在消声室中进行了声学测量。本文研究了运行条件对压缩机声学的影响,结果表明转速是影响压缩机噪声的主要因素。流体、结构和空气噪声的声谱主要由与转速相关的音调成分构成。此外,还研究了不同压力、过热度、蒸汽含量和制冷剂填充量对涡旋式压缩机声学特性的影响。研究结果有助于深入了解运行条件与声学参数之间的物理关系,并有助于制定合适的降噪措施。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Study of the Acoustics of an Electric Refrigerant Scroll Compressor
In electrified vehicles, auxiliary units can be a dominant source of noise, one of which is the refrigerant scroll compressor. Compared to vehicles with combustion engines, e-vehicles require larger refrigerant compressors, as in addition to the interior, the battery and the electric motors must be cooled. The compressor causes the acoustic excitation of other refrigeration circuit components and the chassis via pressure pulsations and vibration transmission, as well as emitting airborne sound directly. Sound measurements have been performed in an anechoic chamber to investigate the influence of operating conditions on the acoustics of an electric scroll compressor. This paper investigates the influence of the operating conditions on compressor acoustics and shows that rotation speed is the main factor influencing compressor noise. The sound spectra of fluid, structure and airborne noise are dominated by speed-dependent, tonal components. Additionally the effect of varying pressure, superheat, vapor content and refrigerant filling quantity on the acoustic properties of the scroll compressor have been investigated. The findings provide insights into the physical relationship between operating conditions and acoustic parameters and enable the development of suitable sound reduction measures.
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