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db3u10e-2-30b/100xyw220-50nz5l华德溢流阀现货销售-昆山德益恩机电设备有限公司手机：先导型溢流阀在卸荷时，会因液压回路的压力急骤下降而发生压力冲击噪声。愈是高压大容量的工作条件，这种冲击噪声愈大，这是由于溢流阀的卸荷时间很短而产生液压冲击所致在卸荷时，由于油流速急剧变化，引起压力突变，造成压力波的冲击。压力波是一个小的冲击波，本身产生的噪声很小，但随油液传到系统中，如果同任何一个机械零件发生共振，就可能加大振动和增强噪声。所以在发生液压冲击噪声时，一般多伴有系统振 动。 　db3u20h-1-30b/100yw220-50nz5
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4机械噪声 　　
先导型溢流阀发出的机械噪声，一般来自零件的撞击和由于加工误差等产生的零件磨擦。 　　在先导型溢流阀发出的噪声中，有时会有机械性的高频振动声，一般称它为自激振动声。这是主阀和导阀因高频振动而发生的声音。它的发生率与回油管道的配置、流量、压力、粘度等因素有关。一般情况下，管道口径小、流量少、压力高、油液粘度低，自激振动发生率就高。
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