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How to prevent air intrusion into the hydraulic system?

How to prevent air intrusion into the hydraulic system?

In normal atmospheric temperature, hydraulic oil contains volume ratio of 6 to 8% of the air, when the pressure decreases, time and space will be free from the oil, bubble rupture, hydraulic components "cavitation", noise. A large number of air into the oil will make "cavitation" phenomenon intensified, hydraulic oil compression increases, unstable work, reduce work efficiency, the implementation of components "work" "crawling" and other adverse consequences.

In addition, the air will also make the hydraulic oil oxidation, accelerate the deterioration of oil. To prevent air invasion, we should pay attention to the following points:

(1) after repairing and changing oil, the air in the system can be eliminated according to the instruction manual, so that the normal operation can be performed.

(2) the suction port of the hydraulic oil pump shall not be exposed to the oil surface, and the suction line must be well sealed.

(3), the pump drive shaft seal should be good, should pay attention to the replacement of the seal should be the use of "lips" authentic seal, do not use the "single lip seal" instead of "single lip seal", because only one-way sealing oil, does not have the function of sealing gas.

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