The quality of hydraulic oil has a great impact on the working performance of the hydraulic system. The root cause of many failures is to prevent oil pollution. Installing a hydraulic oil filter in an appropriate place can trap pollutants 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 filtering material. Their filtering effect on solid pollutants 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, cast sand, welding slag, iron filings, paint, paint skin and cotton yarn debris, and impurities entering the hydraulic system from the outside, such as via the filler port and Dust entering the dust ring and other places; impurities generated during the working process, such as the debris formed by the hydraulic pressure of the seals, metal powder produced by relative wear caused by movement, oily gums, asphaltenes, carbon residues due to oxidative deterioration, etc. . After the above impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, it will play a destructive role everywhere, which seriously affects the normal operation of the hydraulic system, such as the small gap between the relatively moving parts of the hydraulic components (in terms of) and throttling Pinholes 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 generation, exacerbate the chemical action of the oil, and deteriorate the oil. According to production statistics, more than 75% of the failures in the hydraulic system are caused by impurities mixed in the hydraulic oil, so it is important for the hydraulic system to maintain the cleanliness of the oil and prevent oil pollution.