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在生产中,为了减轻冲击和振动,需要在生产设备和基础之间,或在精密仪器和基座之间放置弹性材料,对冲击和振动进行隔离.弹性材料的选择是十分重要的。频比-隔离效率曲线图(以下简称频比图),可以帮助我们直观地正确选用弹性材料。选择弹性隔振材料时,首先应确定两个参数:(1)产生振动的设备所具有的运转速度(即扰动力频率),(2)希望隔离振动的程度(隔离效率)。用这两个参数即可确定所用隔离材料的自然频率。f_n(自然频率)=f_d(扰动力频率)/R(频比) 举例说明该图表的使用方法:一台水泵的运转速度为1800rpm,希望隔离振动的程度即隔离效率为95％(使传到水泵基座的振动减少95％),在图表右,
In production, in order to reduce shock and vibration, it is necessary to place elastic materials between production equipment and foundations or between precision instruments and pedestals to isolate impact and vibration. The choice of elastic materials is very important. Frequency ratio - isolation efficiency curve (hereinafter referred to as the frequency ratio chart), can help us intuitively correct selection of flexible materials. When choosing an elastic vibration-isolating material, first determine two parameters: (1) the operating speed of the equipment generating the vibration (ie the disturbance frequency), and (2) the degree of isolation (isolation efficiency) desired. Use these two parameters to determine the natural frequency of the isolation material used. f_n (natural frequency) = f_d (disturbance frequency) / R (frequency ratio) The following table shows how to use this chart: The speed of one pump is 1800rpm, and the degree of isolation vibration is 95% Pump base vibration reduction of 95%), in the chart right,