自动逆洗滤器

ZDF型自动逆洗滤器
 Auto Backflush filter

●主要用途
  本滤器主要用于柴油发动机燃油的精细过滤,特别是劣质重油的过滤,保护柴油机可靠正常的运转。由于使用了定时逆洗与压差逆洗的新技术,特别适用于机舱的自动化
  本滤器可单独安装在柴油发动机前,也可作为燃油供应系统装置的一部份。
●结构与原理
  本滤器由本体、滤芯组件、传动轴,减速电机、逆洗排出部分及仪表板等组成。
燃油从滤芯的外侧进入,精密滤网滤掉杂质成份,过滤后的燃油从滤芯的内侧流出。通过不断的过滤,油渣等杂质粘附在滤芯上,入口和出口的压力差逐渐增大,当达到设定值时(可调),逆洗排出阀打开,同时减速电机带动滤芯慢速转动,具有一定压力的燃油从滤芯内侧流向排泄口(此时排泄口的压力接近零值),附着在滤芯外侧的杂质、污泥等被冲出排泄口,使滤芯表面清洁。
逆洗时,无需中断正常的过滤工作。逆洗设定方法有两种:其一是时间设定,即按设定的时间间隔逆洗;其二是压差设定,即出入口的压力差值达到设定值时,实施逆洗。
  滤芯采用不锈钢凹口金属线缠绕而成,其强度高且具有优良的耐腐蚀性。因此,只要不受到物理损伤,可以永久性使用。


●Main Use
   This filter is mainly used for the fine filtration of diesel engine fuel oil, especially for the filtration of the inferior heavy oil. Since the filter adopts the new technology of timing reverse flush and differential pressure reverse flush, it is especially suitable for the automation of the cabin. This filter can be installed in front of the diesel engine separately, and can also be as a part of fuel oil supply system. 
●Structure and principle
   This filter is composed of the filter body, filtrating core components, driving shaft, retarding motor, reverse flushing discharge part and instrument panel etc.
  The fuel oil flows into filter from the outside of filtrating core and flows out from the inside of the core, with the fine filtrating screen moving the impurities. Through constant filtration, the pressure differences between inlet and outlet increase gradually, when it gets to a certain value (adjustable), the reverse flush discharge valve opens, and meanwhile, retarding motor drive the filtrating core rotate slowly. The fuel oil with a certain pressure flows into discharge tap (at this time, the pressure at the tap is near zero) from the inside of the core. The impurities and filth attached on the outside of the core are flushed out of the tap, so as to keep the surface of the core clean.
  During the reverse flushing, the normal filtration is unnecessary to stop. There are two kinds of methods for setting the reverse flushing: the first is the time setting, the other is the pressure difference setting, i.e. when the pressure difference between inlet and outlet reaches the set value, the reverse flushing is implemented.
  The filtrating core is made by stainless steel notch metal by enwinding, with high intensity and resistance for corrosion; therefore, it can be used permanently unless it is damaged physically.

 

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