The quality of a hydraulic system depends not only on the rationality of the system design and the performance of the system components, but also because of the system of pollution prevention and treatment, the system of pollution directly affects the reliability of the hydraulic system and component life, according to Statistics show that about 70% of hydraulic system failures at home and abroad are caused by pollution. Oil pollution on the system are mainly as follows: 1) pollution of components Pollution in the oil caused by various pollutants in various forms of wear and tear, solid particles into the movement of Vice clearance, cutting or wear and tear on the part surface wear and tear. The impact of solid particles in the high-speed fluid on the surface of the component causes erosion wear. The oxidation of water and oil in the oil produces a corrosive effect on the element. In addition, the air in the system oil causes cavitation, causing the surface of the component to erode and break. 2) The components of the blockage and clamping failure Solid particles plug the hydraulic valve clearance and orifice, causing the spool plug and jamming, affecting performance, and even lead to serious accidents. 3) to accelerate the deterioration of oil performance Oil and water in the oil with its thermal energy is the main condition of oil oxidation, and oil in the metal particles play an important catalytic oxidation of oil, in addition, the water in the oil And suspended bubbles significantly reduce the strength of the oil film between the movement, so that lubrication performance decreases. A system is generally rinsed before it is formally put into operation. The purpose of rinsing is to remove contaminants, metal shavings, fiber compounds, iron core, etc. remaining in the hydraulic valve system. During the first two hours of operation, even without completely damaging the system, Can also cause a series of failures. Therefore, the following steps should be taken to clean the system oil: 1) Clean the tank with a clean dry solvent and remove the solvent residue with filtered air. 2) Clean all piping of the system, in some cases the piping and fittings need to be impregnated. 3) Install oil filter in the pipeline to protect the valve oil supply pipeline and pressure pipeline. 4) Install a flush plate on the collector to replace the precision valve, such as electro-hydraulic servo valve. 5) Check all pipe size is appropriate, the connection is correct.
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