The hydraulic cylinder has the application in the prevention of cavitation erosion, it has many reasons for the prevention measures although cavitation is produced, but the cavitation phenomena can be avoided as long as the necessary measures are taken to prevent them positively. Below for the causes of cavitation, talk about the precautionary measures to be taken.
(1) Strict hydraulic oil selection strictly according to the use of oil standard selection of hydraulic oil. The use of good quality hydraulic oil, can effectively prevent the hydraulic system in the process of bubble. In the selection of oil, should be based on the lowest temperature in different regions to choose, and according to the standard of oil filling hydraulic oil, but also should keep the hydraulic system clean (add hydraulic oil, should be prevented from bringing moisture and other impurities into the water, often check hydraulic oil, oil and oil color, if found in hydraulic oil blisters, foam, or oil into milky white, should carefully look for the source of the air in the oil, and promptly eliminate.
(2) to prevent excessive oil temperature, reduce the hydraulic impact of reasonable design of heat dissipation system, to prevent excessive oil temperature, is to maintain the hydraulic oil temperature is the key. If an exception occurs, you should find the reason and exclude it in time. In the manipulation of hydraulic joystick and distribution valves, to strive for smooth, not too fast, too fierce, also should not frequently increase the engine throttle, as far as possible to minimize the hydraulic pressure on the impact of the hydraulic components. At the same time, the cooling system should be maintained in a timely manner so that the temperature of the cooling system is kept in the right range to reduce the energy released when the bubble burst. Without affecting the normal circulation of the coolant, it can be appropriately added a quantitative anti-corrosion additive to suppress corrosion.
(3) To maintain the normal clearance of the hydraulic components of the joint surface in the manufacture or repair of the main parts of the hydraulic cylinder (such as cylinder, piston rod, etc.), should be assembled in accordance with the tolerance of the lower limit value, practice proves that this can be a good reduction in cavitation phenomena. If the hydraulic components have cavitation phenomena, then can only use the metallurgical abrasive polishing technology to remove the cavitation pitting and surface deposition of carbon, must not use the general fine sandpaper to grind.
(4) Should pay attention to the exhaust hydraulic cylinder after maintenance, the hydraulic system should be operated smoothly for a certain time, so that hydraulic oil in the hydraulic system is fully circulating; when necessary, the hydraulic cylinder enters the tubing (or back tubing) to be disassembled, so that the hydraulic oil spill, to achieve a single hydraulic cylinder exhaust effect.