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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.

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.

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.

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.

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.

Sources of solid particulate pollutants, 1 in the system is the main source of pollutants, it produced pathway has the following several points:

2, in the machine and loading process residues in the processing of iron dust, impurities, etc.;

The 3 part, debris due to friction or abrasion of the sealing element are mutually generated;

Small particles of 4, because of pipeline corrosion, rust and produce.

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.

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, for the configuration of filtering equipment in the hydraulic system, usually have the following:

2, oil filtering equipment, its main role to protect the pump, in order to avoid congestion caused by pump suction.

3, pressure filtration equipment, mainly used for high precision requirements of the valve system, especially the system with proportional servo valve.

4, back to the oil filter device, the filter equipment indirectly to protect the whole system function.

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.

Misunderstanding 1 selection filtering equipment hydraulic system

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

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 error two: filtration equipment rated (nominal) the actual traffic flow is the system

The rated flow filtration equipment is oil viscosity in the 32cst when the filter clean oil under the provisions of the original resistance of