液压缸气蚀原因及预防措施（Causes of hydraulic cylinder cavitation and preventive measures）.doc

液压缸气蚀原因及预防措施（Causes of hydraulic cylinder cavitation and preventive measures） Causes of hydraulic cylinder cavitation and preventive measures 2011-09-05 13:42 in the maintenance of construction machinery hydraulic cylinder, hydraulic cylinder can often see the inner wall of the cylinder, piston or piston rod has some honeycomb holes, which are caused by cavitation. Cavitation will cause the cylinder and piston rod to become rough, the surface of the hydraulic cylinder will leak and the working speed will decrease. When cavitation is combined with other forms of corrosion In the maintenance of construction machinery hydraulic cylinder, hydraulic cylinder can often see the inner wall of the cylinder, piston or piston rod has some honeycomb holes, which are caused by cavitation. Cavitation will cause the cylinder and piston rod to become rough, the surface of the hydraulic cylinder will leak and the working speed will decrease. When cavitation and other forms of corrosion work together, it will accelerate the corrosion speed of the main parts of the hydraulic cylinder, thus seriously affecting the normal use of construction machinery. 1. factors affecting cavitation When the parts of the hydraulic cylinder face the hydraulic oil, the gas dissolved in the hydraulic oil is easy to precipitate and form bubbles. When these bubbles flow to the high pressure zone, they break, and the transient high temperature and high pressure micro jet and impact force repeatedly act on the surface of the hydraulic cylinder parts, so that the surface of the parts is cavitation. The conditions of cavitation in hydraulic cylinder are related to the structure of hydraulic system, the parts of hydraulic cylinder, the quality of hydraulic oil, the manufacture and maintenance. (1) hydraulic system structure If the hydraulic system pipeline, control valve and other parts of the passage is too narrow and bend too much, will make the hydraulic oil temperature rise, impact force increases, easy to p