With the progress of science and technology, the customer is more and more high demand and the service life of the machine performance. The hydraulic system is a lot of machinery and equipment have a component, but with the development of hydraulic technology, the machine for the oil's cleanliness requirements are also getting higher and higher, so in the design of hydraulic system, can not think of filtration equipment, belonging to the auxiliary component and ignore it, ignore it. They vary in size, different specifications, nature also makes the hydraulic filter equipment of different sizes, different specifications. We should according to the actual situation make good use of it, as far as possible to make the machine better life and performance, but also makes the machine cost minimum.
就液压过滤设备来说，因为现在市面上型号各异，所以它们所能应用的液压系统也是千差万别，因此，在选择液压过滤设备时，还是有非常多的细节需要我们注意的。
Hydraulic filtration equipment, because now the market sizes, so the application of hydraulic system they can also differ in thousands of ways, therefore, in the selection of hydraulic filtration equipment, still have very many details we need to pay attention to the.
尤其是对液压过滤设备不是很了解的消费者，更是要先去了解下面我所提到的一些注意事项，才可以有针对性的、目的性的去选购液压过滤设备。
Especially for the hydraulic pressure filtration equipment is not very understanding of consumers, more is to first understand some matters needing attention what I have mentioned above, we can have a for the purpose of, to choose hydraulic filtration equipment.
首先，我们知道液压过滤设备是用于过滤油液中的杂质的，那么这里就需要考虑到液压过滤设备的过滤纯度（即是否有效过滤杂质）和拦截杂质污垢的能力。
First of all, we know that the hydraulic filter equipment is used for filtering impurities in the oil, then there is the need to take into account the purity of hydraulic filter filtration equipment (i.e. whether effective filtering impurities) and intercept dirt ability.
随着在液压系统中各种精密阀块如比例阀、伺服阀大量的使用。注塑系统对于油液精度的要求越来越高,根据国内外统计资料表明，液压系统的故障大约有70％~80％是由于液压介质受污染所引起的。这种故障在使用了比例阀及伺服阀后更加明显。因此在设计过程中正确选择过滤设备是确保液压系统正常运行和延长液压设备使用寿命的关键。
With all kinds of precision valve block, such as a large number of proportional valve and servo valve used in the hydraulic system. Injection system for the increasingly demanding oil precision, according to domestic and international statistics show that, the fault of hydraulic system about 70%~80% is due to a hydraulic medium from pollution caused by the. This failure is more obvious in the use of the proportional valve and servo valve. Therefore, the correct choice of filtration equipment is the key to ensure the normal operation of the hydraulic system and prolong the service life of hydraulic equipment in the design process.
1、系统中污染物的来源固体颗粒是污染物的主要来源，它产生的途径有以下几点：
Sources of solid particulate pollutants, 1 in the system is the main source of pollutants, it produced pathway has the following several points:
2、在机器装过程中残留的加工铁屑、灰尘、杂质等；
2, in the machine and loading process residues in the processing of iron dust, impurities, etc.;
3、因零件相互摩擦或密封件磨损而产生的磨屑；
The 3 part, debris due to friction or abrasion of the sealing element are mutually generated;
4、因管路腐蚀、生锈而产生的小颗粒。
Small particles of 4, because of pipeline corrosion, rust and produce.
以上这些颗粒会直接影响系统在工作中的可靠性及部分元件的使用寿命。比如：颗粒使阀芯堵塞，影响机器的动作过程，颗粒使泵的配油盘损害，使机器产生很大的噪音，并且影响泵的使用寿命等等。为了提高机器的使用寿命及减少不必要的颗粒，所以在机器上要有选择的安装过滤设备。
These particles will directly affect the system work in the reliability and service life of the component parts. For example: the valve core plugging effect of particles, the action process of the machine, the pan with oil particles pump damage, to generate a lot of noise, and the influence of the service life of the pump and so on. In order to improve the service life of the machine and reduce unnecessary particles, install the filter equipment so there must be selected on the machine.
在我们选择过滤设备时，通常考虑是过滤设备的过滤精度，而实际上在选择过滤设备的过滤效率和滤材的使用寿命也相当重要。目前，国际上通常采用过滤设备的β值来表示过滤设备的过滤效率。所谓β值是指过滤设备进口处流体中大于某一尺寸的颗粒数与过滤设备出口处流体中大于某一尺寸的颗粒数之比。因此β值越大，则该过滤设备的过滤效率也越高。
In our choice of filtration equipment, generally considered to be the filtering precision filtration equipment, and in fact in the choice of filtration efficiency and filtration equipment service life is also very important. At present, international often use filtration equipment beta value to represent the filtering efficiency of the filter equipment. The so-called beta value refers to the filtration equipment inlet fluid is larger than a certain size particles exit numbers and filtration equipment in fluid is larger than a certain size of the ratio of the number of particles. Therefore, the beta value is greater, then the filtering efficiency of the filtering equipment is also higher and higher.
1、对于过滤设备在液压系统中的配置，通常有以下几种：
1, for the configuration of filtering equipment in the hydraulic system, usually have the following:
2、吸油过滤设备，其主要起保护泵的作用，为了防止因堵塞而引起泵吸空。
2, oil filtering equipment, its main role to protect the pump, in order to avoid congestion caused by pump suction.
3、压力过滤设备，主要用于阀的精度要求较高的系统中，尤其是带比例伺服阀的系统。
3, pressure filtration equipment, mainly used for high precision requirements of the valve system, especially the system with proportional servo valve.
4、回油过滤设备，这种过滤设备间接的起到了保护整个系统的作用。
4, back to the oil filter device, the filter equipment indirectly to protect the whole system function.
液压过滤设备作为液压系统污染控制的主要元件,其设计选型是否合理,日常使用(维护)是否正确直接关系到系统的安全及可靠性。而在实际应用中,许多用户对过滤设备选型及使用还存在着诸多误区,不加以纠正将会影响液压系统的正常可靠工作。
Hydraulic filter equipment as the main component of pollution control of the hydraulic system, the selection design is reasonable, the daily use (maintenance) is directly related to the safety and reliability of the system. In practical applications, many users on the selection and use of filtration equipment, there are still quite a few mistakes, not corrected will affect the normal and reliable work of the hydraulic system.
1液压系统中过滤设备的选型误区
Misunderstanding 1 selection filtering equipment hydraulic system
1.1误区一:选择高精度吸油过滤设备既能有效的保护泵,又能保证系统的清洁度
1.1 a misunderstanding: the selection of high precision oil filter device can effectively pump protection, but also can ensure the cleanliness of the system
由于油液中的颗粒污染物会加剧泵的磨损从而影响泵的使用性能和寿命,大颗粒污染物可能还会卡死泵,严重影响系统的安全、可靠性。因此,有些用户就选择了高精度吸油过滤设备,认为其既能保护泵又能保证系统的清洁度。但是,高精度吸油过滤设备由于承受了过多污染物而易堵塞,导致泵吸油不畅,以致吸空,加速泵的磨损,严重影响系统安全。所以,吸油过滤设备的压降要进行严格控制。一般液压系统可以考虑安装低精度吸油过滤设备来保护泵,并且在对污染物敏感的元件前安装过滤设备加以保护,以控制颗粒污染对其影响。为了最有效的截获回路中因元件磨损或外界侵入的污染,建议安装回油过滤设备加以控制,以提高整个系统的清洁度。同时在系统运转前应对管道、油箱进行彻底清洗,以保证其油液污染度。这样整个系统的油液污染度基本上都得到了控制,既保护了泵也保护了整个系统。
Because of wear particle contaminants in hydraulic oil will increase pump so as to affect the pump performance and life, large particles of pollutants may also stuck pump, seriously affect the safety and reliability of the system. Therefore, some users choose a high-precision oil filter equipment, that it can protect the pump system can guarantee cleanliness. However, high precision oil filter equipment due to bear too much pollutants and is easy to be blocked, resulting in poor pump suction, so that the suction air, wear accelerating pump, seriously affect the system security. So, the pressure drop of oil filtration equipment should be strictly controlled. The hydraulic system can generally consider installing low precision oil filter equipment to protect the pump, and sensitive components of the pollutants before the installation of filtration equipment to be protected, to control particulate pollution on them. In order to component wear or outside intrusion pollution because most effectively capture the loop, the proposed installation of return oil filter equipment to control, to improve the whole system cleanliness. At the same time in the system operation before the deal with pipeline and tank thoroughly cleaned to ensure that the oil contamination. So the whole system oil contamination has been basically controlled, both to protect the pump also protect the entire system.
1.2误区二:过滤设备的额定(公称)流量就是系统的实际流量
1.2 error two: filtration equipment rated (nominal) the actual traffic flow is the system
过滤设备的额定流量是油液黏度在32cst的时候,油液在规定原始阻力下的清洁滤芯所
The rated flow filtration equipment is oil viscosity in the 32cst when the filter clean oil under the provisions of the original resistance of
