Pipeline stress of fixed frequency rotary compressor during start-up phase
In order to solve the problem of pipeline stress during the start-up phase of the outdoor unit of an air conditioner,the transient vibration characteristics of the com-pressor are analyzed through vibration experiments firstly,and the causes of the problem are discussed.Secondly,the finite element analysis model of pipeline vibration is estab-lished,and the shock response spectrum at the upper cover of the compressor reservoir is used as the excitation to analyze the pipeline vibration stress,as well as an optimization scheme is proposed.The results show that the maximum tangential vibration acceleration of the compressor at the starting moment is 7.9 times that of the stable operation stage.The compressor impact load excites the rigid modes of the compressor and modes of suction pipeline,thus leading to the stress problem of inlet suction pipe.The maximum vibration stress of the pipeline optimization scheme is 34.8 MPa,which is 47.2％lower than that of the original scheme(65.9 MPa),and it is verified to be effective by tests.The research results have reference value for the pipeline stress analysis at start-up and optimization design of the air conditioner with the constant frequency rolling rotary compressor.
air conditionerrotary compressorfixed frequencypipeline stressstart-upshockvibration
万方数据
维普
