折疊濾芯
1 空氣濾芯
選用的空氣濾芯一定要與原裝發動機的動力性、經濟性及可靠性匹配。
(1)額定進氣量
濾芯技術參數中的空氯流量應大于配用發動機的額定進氣量。
(2)過濾材料
對過濾材料有厚度、抗張力、原始進氣阻力、過濾精度等要求。進口柴油朵要求空氣過濾精度為5μm，國產柴油機也要還應小于20μm。高效濾紙的過濾精度為2μm，普通進口濾紙為30μm，而國產濾紙僅為80μm。
(3)濾芯性能試驗
①流量-阻力(壓降)試驗 測定空氣流動壓力損失(流量-阻力或流量-壓力分硐曲線)。
②原始過濾效率試驗 可計算出濾芯的集塵效率，正常濾芯的降塵率應為99%以上B085001B085008B085011B085046B085048B105002B105003B105006B105020B125003B125005
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