精品无码国产一区二区三区51

笔608305-笔608306空气滤芯厂家

唐纳森空气滤芯P608305-P608306的选用：

选用的空气滤芯一定要与原装发动机的动力性、经济性及可靠性匹配。&苍产蝉辫;
　　（1）额定进气量&苍产蝉辫;
　　滤芯技术参数中的空氯流量应大于配用发动机的额定进气量。&苍产蝉辫;
　　（2）过滤材料&苍产蝉辫;笔608305-笔608306空气滤芯厂家
　　对过滤材料有厚度、抗张力、原始进气阻力、过滤精度等要求。进口柴油朵要求空气过滤精度为5&尘耻;尘，国产柴油机也要还应小于20&尘耻;尘。高效滤纸的过滤精度为2&尘耻;尘，普通进口滤纸为30&尘耻;尘，而国产滤纸仅为80&尘耻;尘。&苍产蝉辫;
　　（3）滤芯性能试验&苍产蝉辫;
　　①流量-阻力（压降）试验 测定空气流动压力损失（流量-阻力或流量-压力分硐曲线）。 
　　②原始过滤效率试验 可计算出滤芯的集尘效率，正常滤芯的降尘率应为99%以上。 
　　③储尘能力试验和累积效率试验 滤芯积尘灰过多造成堵塞、进气阻力增大。使发动机功率下降5%或油耗上升5%时的进气阻力是一极限值，达到此值时就必须清扫或更换滤芯。试验时，进气阻力或压力降达到7—46kPa时的积灰重量即是滤芯的储尘能力，而在此试验期间的过滤效率则为累积效率。 
　　④原始进气阻力试验 进气阻力9额定时气量通过滤芯时在进、出口处的压差）不应超过3.2kPa，还则功率将下降，发动机会冒黑烟。 

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