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离心泵输送冷水时工作正常,输送热水时发生频率较高的振动和噪声,有可能是发生了( )现象。
A.共振
B.汽蚀
C.喘振
D.B或C
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更多 “ 离心泵输送冷水时工作正常,输送热水时发生频率较高的振动和噪声,有可能是发生了( )现象。A.共振B.汽蚀C.喘振D.B或C ” 相关考题
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66、在鱼洗实验中,下列哪个说法是正确的? In the fish washing experiment, which of the following statements is true?A.当鱼洗器壁的振动频率越来越接近于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is closer and closer to the natural frequency of the fish washer;###SXB###B.当鱼洗器壁的振动频率大于鱼洗固有频率时,产生共振现象; Resonance phenomenon occurs when the vibration frequency of the wall of the fish washer is greater than the natural frequency of the fish washer;###SXB###C.当鱼洗器壁的振动频率小于鱼洗固有频率时,产生共振现象; When the vibration frequency of the fish
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由于泵内存在气体,使离心泵启动时无法正常输送液体而产生气缚现象。
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