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鼓风机入口蝶阀的导叶片安装错误,使风机入口气流旋转方向与叶轮的旋转方向相反,是导致风机外壳和风道震动的主要原因。
Blower inlet butterfly valve guide vane installation error, the fan inlet airflow direction of rotation and impeller rotation in the opposite direction, is the main cause of fan housing and duct vibration.