The quality of hydraulic oil has a great influence on the working performance of the hydraulic system. Many faults are rooted in it. To prevent oil contamination, install a hydraulic oil filter in an appropriate place to trap the contaminants in the oil and keep the oil clean. , To ensure the normal operation of the oil system.

Hydraulic oil filters can be divided into surface type, depth type and magnetic filter according to the filter material. Their filtering effect on solid contaminants is accomplished by direct blocking and adsorption.

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 still remaining in the hydraulic system after cleaning, such as scale, casting sand, welding slag, iron filings, paint, paint and cotton yarn scraps, etc., and impurities that enter the hydraulic system from outside, such as through the oil filler and Dust that enters the dust ring, etc.; impurities generated during the working process, such as the fragments formed by the hydraulic pressure of the seal, the metal powder generated by the relative wear of the movement, the gum, asphaltene, carbon residue, etc. generated by the oil due to oxidative deterioration . After the above-mentioned impurities are mixed into the hydraulic oil, as the hydraulic oil circulates, it will cause damage everywhere, which will seriously affect the normal operation of the hydraulic system, such as making a small gap (in terms of) between relatively moving parts in hydraulic components and throttling Small holes and gaps are stuck or blocked; damage the oil film between relative moving parts, scratch the surface of the gap, increase internal leakage, reduce efficiency, increase heat generation, 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, maintaining the cleanliness of the oil and preventing the contamination of the oil are very important for the hydraulic system.

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