风电厂主机密封油滤芯HP8317L16-1LB 正航供应

Hy-Pro产品的***

什么是DFE (动态过滤效率试验?)

所有的液压润滑系统都有一个被***敏感的元件, 比如伺服阀

或高速轴承等元件限定的而不是界定的严格的污染度等级, 元件

生产厂商根据 ISO4406 或 ISO4406: 1999 提供了流体的污染度等

级. 要求有的性能和***长的寿命. 污染度等级决定了个体元

件的磨损率(使用寿命) 并且能尽可能使用的像预期的那么好.

系统设计,过滤性能和维护很大地决定了系统的污染度等级,

过滤器被希望保持在公差等级以下, 在运转中系统的过滤器性能

基于流速，流动密度，流速的变化，粘度，频率，污染度等级，

注入速度和其他的几个条件。

所有的过滤器都受限于系统的动态形式，

液压系统过滤器遇到流

速上的频率和快速变化伴有频率的变化。润滑系统在启动和关机过程中有典型的动态状态。过滤

器的两个主要特性是截留率和存留率。 截留率是过滤器捕获颗粒的效率，而存留率是一种过滤

器保存住捕获住的颗粒的效率。 一个过滤器不是黑洞，它的过滤效率不一定只基于它捕获

的颗粒效率。如果设计不当， 一只过滤器有可能变成***危险的污染源。

动态过滤效率试验（DFE）是液压润滑过滤器性能测试的一个变革，DFE 试验比当前工业更

***一步，它通过减少动态负荷循环，并在循环前，循环中和循环后进行测量实际的性能来弥补

了实验室和实际应用之间的鸿沟。DFE 试验使实际使用中的截留率和存留率合格了，因此我们

能够预测***糟糕的流体清洁度平均的清洁度。DFE 试验方法是 Scientific Services Inc(SSI)和

Hy-Pro Filtration 联合***于 1998.

现行过滤器测试方法

过滤器总成和滤芯的生产厂商在理想的实验室条件采用工业标准测试过滤效率和纳污能力。

该测试方法是在 1999 年根据 IS04572 更新为 IS016889 多次通过试验协议。此协议提供重复测试

方法，在不同测试的情况下时相同的滤芯产生

同样的过滤效率。 MIL-H-5606

液压油在一个闭环系统以恒定流量进行

测试滤芯，而且在过滤器前后都装有

颗粒计数器。在上游颗粒计数器前加入

一定量的污染物。一小部分流体被过滤;

然后通过过滤器前和后的颗粒计数器

计算出过滤效率。过滤效率是在***的

污染颗粒（X[C]）下通过下述关系公式

的 Beta 值来表示:

根据 ISO16889 的过滤效率 Beta 值:

βX[C]= 上游≥X[C]污染颗粒数量

下游≥X[C]污染颗粒数量

如β7[c]=600/4=150, 过滤效率（Beta）：β7[c]=150

过滤效率也可表示为***比：

β7[c]=150=（

β-1）/β×100，过滤比效率β7[c]=150=（150-1）/150×100=99.33%

该过滤器在过滤 7[c]或更大的颗粒下过滤效率为 99.33%

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HC2618FMZ36Z HP102L36-1MV

HC4704FAN13H HP474L13-6EB-NSD

HC4704FAN13Z HP474L13-6EV-NSD

HC4704FAN16H HP474L16-6EB-NSD

HC4704FAN16Z HP474L16-6EV-NSD

HC4704FAN8H HP474L8-6EB-NSD

HC4704FAN8Z HP474L8-6EV-NSD

HC4704FAP13H HP474L13-3EB-NSD

HC4704FAP13Z HP474L13-3EV-NSD

HC4704FAP16H HP474L16-3EB-NSD

HC4704FAP16Z HP474L16-3EV-NSD

HC4704FAP8H HP474L8-3EB-NSD

HC4704FAP8Z HP474L8-3EV-NSD

HC4704FAS13H HP474L13-12EB-NSD

HC4704FAS13Z HP474L13-12EV-NSD

HC4704FAS16H HP474L16-12EB-NSD

HC4704FAS16Z HP474L16-12EV-NSD

HC4704FAS8H HP474L8-12EB-NSD

HC4704FAS8Z HP474L8-12EV-NSD

HC4704FAT13H HP474L13-22EB-NSD

HC4704FAT13Z HP474L13-22EV-NSD

HC4704FAT16H HP474L16-22EB-NSD

HC4704FAT16Z HP474L16-22EV-NSD

HC4704FAT8H HP474L8-22EB-NSD

HC4704FAT8Z HP474L8-22EV-NSD

HC4704FAZ13H HP474L13-1EB-NSD

HC4704FAZ13Z HP474L13-1EV-NSD

HC4704FAZ16H HP474L16-1EB-NSD

HC4704FAZ16Z HP474L16-1EV-NSD

HC4704FAZ8H HP474L8-1EB-NSD

HC4704FAZ8Z HP474L8-1EV-NSD

HC4704FKN13H HP474L13-6MB

HC4704FKN13Z HP474L13-6MV

HC4704FKN16H HP474L16-6MB