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A2F28R6.1P6
两处容积的大小、位置与噪声有关。阀片对阀座和支持件的撞击噪声吸入的气体量大，泵的循环油量多，阀片噪声就越大，阀跳高，阀的面积大，阀片噪声也大，阀片材料也有一定影响。橡胶阀片的噪声应比钢片或层压板为好。为此，要节制进油量，阀片关闭要及时，要严密。注意阀的选材与结构。箱体内的回声和气泡破裂声气量增大时，此项噪声将增大。开气镇时或通大气时此项噪声会明显增大。如果气镇量可调，则可合理调节气镇量。大量气体和油排出时冲击挡油板等零部件时发出的噪声。如果零件刚性不足，或未紧固，产生振动与碰撞，会使此项噪声增大。因此挡油板不仅应有足够刚度并紧固，而且，在需与其他零件（如油箱）接触时，利用夹橡胶的方法可避免振动引起的碰撞噪声，并改善挡油效果。旋转将气体吸入、压缩并排出的真空泵，如往复真空泵、旋片真空泵、滑阀真空泵、罗茨真空泵，产生噪音的原因很大程度来自活塞的磨损。应避免在真空度或排气压力附近运行真空泵。
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