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对空调室外机的实际管道结构建立力学模型后,用有限元程序对其进行模态分析,得出该管道结构固有频率值和对应固有频率下的振型图。分析出管系结构固有频率落在压缩机对管系结构激发频率的共振区内,这样使得管系很容易发生机械共振,产生剧烈的管道振动。为了消除机械共振,对该管道的排气管和进气管结构进行重新设计与优化,使得改进后的管系结构固有频率避开激励频率的共振区。在半消声室对改进配管的室外机进行位移测试,改进的配管位移值不仅远小于原配管值,而且改进配管的位移测试值也小于企业标准,进一步验证配管理论的正确性,这对空调的成本节约与产品质量的提升具有重要的意义。
After establishing the mechanical model of the actual pipeline structure of the outdoor unit of air conditioner, the finite element program is used to carry out the modal analysis to obtain the natural frequency value of the pipeline structure and the vibration pattern at the corresponding natural frequency. It is analyzed that the natural frequency of the piping system falls within the resonance zone where the compressor excites the excitation frequency of the piping structure so that the piping system is prone to mechanical resonance and produces violent pipeline vibration. In order to eliminate the mechanical resonance, the exhaust pipe and intake pipe structure of the pipeline are redesigned and optimized, so that the natural frequency of the improved pipe structure avoids the resonance frequency of the excitation frequency. In the semi-anechoic chamber to improve the displacement of outdoor pipe machine for the displacement test, the improved pipe displacement is not only much less than the value of the original pipe, and improve the pipe displacement test values are less than the corporate standard to further verify the correctness of the piping theory, which air-conditioning The cost savings and product quality improvement is of great significance.