空调风扇叶片进口角及弦长变化对其固有频率的影响

Effects of Blade Design on Frequency of Fan in Air Conditioner

用有限元方法对空调风扇叶片进口角、叶片弦长变化对其固有频率的影响规律进行了研究 .首先利用一个悬臂梁算例验算了软件有限元计算的误差情况 ,接着分析低阶条件下的空调风扇简化模型的合理性 ,最后在叶片进口角、叶片弦长变化等不同条件下 ,对简化模型进行固有频率计算 ,得到了叶片进口角。

This paper presents effects of blade on frequency of fan in air conditioners using finite element analysis method when the angle of air-inlet and the chordal length of blade are changed.First an example of canti lever beam is used to check the correctness of values got by using a finite elem ent analysis software.Then the applicability of a simplified calculating model o f the fan in low order vibration condition is discussed.Finally,calculating mode l is used to analyze the effects of different angles of air-inlet and different chordal lengths of blade on frequency so that the approximative effect law abou t blade parameters bringing to the fan in air conditioner in frequency field is gotten.