How to avoid cavitation in hydraulic cylinders?
Use qualified hydraulic oil
Choose hydraulic oil with good quality and suitable brand, which can effectively prevent the hydraulic oil from generating bubbles during operation. The selection of hydraulic oil should be selected in accordance with the relevant technical requirements and with reference to the local temperature, and should be filled according to the oil dipstick standard. In addition, keep the hydraulic system clean. Check the oil quality, oil level and oil color of the hydraulic oil frequently. If foam or milky white is found in the hydraulic oil, it means that air has been mixed in the hydraulic oil. The air source should be carefully checked and replaced with new oil. If high water-based hydraulic oil is used, a high-mounted hydraulic oil tank should be equipped to increase the pressure at the oil inlet of the hydraulic pump and effectively prevent cavitation in the hydraulic cylinder.
Choose suitable hydraulic oil additives
The use of suitable hydraulic oil additives can effectively restrain the turbidity or hydration of the hydraulic oil, prevent the occurrence of foam, stabilize the quality of the hydraulic oil, and make the hydraulic oil maintain its normal function for a long time.
Prevent excessive oil temperature and reduce hydraulic shock
Reasonably equipped with hydraulic oil heat dissipation device to prevent the hydraulic oil from overheating. If the oil temperature is too high during operation, the cause should be found and cleaned in time to eliminate the condition of bubbles in the hydraulic oil. In addition, when working on the hydraulic system, do not repeatedly increase the engine throttle, and strive to operate smoothly to reduce the impact of hydraulic oil on hydraulic components.
Correctly install or repair the hydraulic cylinder
When installing or repairing the main parts such as the cylinder block and piston rod of the hydraulic cylinder, the installation should be carried out according to the lower limit of the standard tolerance of the device, which can well reduce the occurrence of cavitation. If the hydraulic cylinder parts have been cavitation, only the metallographic sandpaper polishing method can be used to remove the pitting and surface dirt caused by the cavitation, and the general fine sandpaper cannot be used for polishing.