What is the cause of cavitation in hydraulic cylinder?

Cavitation is generated, mainly due to the hydraulic cylinder in the process of the work of the piston and the guide sleeve in the oil mixed with a certain amount of air. With the pressure gradually increased, the gas in the oil will become a bubble, when the pressure rise to a certain limit, these bubbles in the role of high pressure will occur, so that high temperature, high pressure gas quickly on the part of the surface, resulting in a hydraulic cylinder made angry, causing parts of corrosive damage.

(2) the quality of the hydraulic oil is not qualified to cause cavitation

To ensure the quality of hydraulic oil is an important factor to prevent cavitation. If the oil is poor, it is easy to produce foam, which leads to the occurrence of cavitation. Secondly, the change frequency of the oil pressure is too fast, too high, it will directly cause the formation of bubbles, and accelerate the rupture of the bubble. Experiments have proved that the pressure change frequency is high, the speed of cavitation will be accelerated. Such as the hydraulic cylinder inlet, back to the oil port, etc., due to the relatively high frequency of pressure change, the degree of cavitation is relatively higher than other parts. In addition, oil overheating will increase the probability of occurrence of cavitation.

(3) the manufacture and maintenance of improper lead to cavitation

Due to the installation or maintenance of the hydraulic system is not enough to make full exhaust, which leads to the system in the presence of gas, at high temperature, high pressure can produce cavitation.

(4) the quality of the cooling liquid has a problem causing cavitation

When the cooling liquid containing corrosive medium, such as ion, such as oxidation agent, prone to chemical and electrochemical corrosion, in their joint effect, also can accelerate the cavitation rate; if the cooling system maintenance well, can prevent cavitation. For example, the pressure of the cooling system heat sink, if maintained well, can make the radiator cooling fluid pressure is always higher than the steam pressure, so as to prevent the generation of cavitation. For example, cooling system thermostat; a good performance of the thermostat can be so that the cooling fluid to maintain in the appropriate temperature range, can reduce the bubble burst when the release of energy.