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What is the function of the hydraulic oil filter element and what are the purchasing skills?

The quality of hydraulic oil has a great influence on the working performance of the hydraulic system, and many faults are rooted in it. Prevent oil contamination Install hydraulic oil filters in appropriate places, which can trap contaminants in the oil and keep the oil clean. , to ensure the normal operation of the oil system.

The main function of the hydraulic oil filter is to filter the hydraulic oil, and various impurities inevitably appear in the hydraulic system. The main sources are: mechanical impurities remaining in the hydraulic system after cleaning, such as rust, casting sand, welding slag, iron filings, paint, paint skin and cotton yarn scraps, etc., and impurities entering the hydraulic system from outside, such as through the oil filler and Dust entering the dust ring, etc.: impurities generated during the working process, such as debris formed by the hydraulic action of the seal, metal powder caused by relative wear and tear of the movement, colloid, asphaltene, carbon residue, etc. generated by the oxidative deterioration of oil .

After the above impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, it will play a destructive role everywhere, seriously affecting the normal operation of the hydraulic system, such as making a small gap (in terms of) between the relatively moving parts in the hydraulic components and throttling. Small holes and gaps are stuck or blocked; destroy the oil film between the relatively moving parts, scratch the surface of the gap, increase internal leakage, reduce efficiency, increase heat, aggravate the chemical action of the oil, and make the oil deteriorate. According to production statistics, more than 75% of the failures in the hydraulic system are caused by impurities mixed in the hydraulic oil. Therefore, it is very important for the hydraulic system to maintain the cleanliness of the oil and prevent the pollution of the oil.

When choosing a hydraulic oil filter element, the following points should be paid attention to:

1. Filtration accuracy of hydraulic oil filter element

Each hydraulic system must consider the purity of the hydraulic oil, which is also the original purpose of using the hydraulic oil filter element, so the filtration accuracy is the first consideration.

Some people will say: In this case, why don’t I choose the hydraulic oil filter element with the highest precision (so that the filter is clean)?

The high-precision filtration effect is indeed good, but this is actually a big misunderstanding. The precision of the hydraulic oil filter element required by the hydraulic system is not “high” but “appropriate”. High-precision hydraulic oil filter elements have relatively poor oil-passing ability (and the accuracy of hydraulic oil filter elements installed in different positions cannot be the same), and high-precision hydraulic oil filter elements are also more likely to be blocked. One is the short lifespan and must be replaced frequently.

Second, the strength of the hydraulic oil filter

Secondly, it is strength and corrosion resistance. The strength of a good hydraulic oil filter element must meet the standard. The hydraulic oil filter element of the pipeline must be able to withstand the high pressure downstream of the pump. The oil suction filter element must be able to withstand the premise of ensuring that the oil flow is not affected. The pressure does not deform, and the mesh does not change the diameter to cause the accuracy to change.

At the same time, the oil used in some systems is corrosive to a certain extent, and the specific use of ordinary filter elements or anti-corrosion filter elements should be determined according to the actual situation.

3. Precautions for installation of hydraulic oil filter element

The installation location should be considered, which is also a very important part. If you are not sure where to install it, you cannot choose the hydraulic oil filter element. The function and accuracy of the hydraulic oil filter element in different positions are also different.

How to choose a hydraulic oil filter? In fact, the purchase of hydraulic oil filter mainly depends on three points: the first is accuracy, each hydraulic system must consider the purity of hydraulic oil, which is also the original purpose of using oil filter. The second is strength and corrosion resistance; finally, filter elements with different filtering functions and precision are selected according to different installation positions.

I believe that after knowing these, I believe it will be of great help for you to choose and use the filter element.

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