How to prevent air from getting in the hydraulic cylinder system?
1. Should come up to the requirements of tolerance when manufacturing and repairing parts. Assembling with fit clearance guarantee.
2. Fasten the connections of every pipe.
3. The seals gasket should be smooth, and not allow using multilayer paper pad.
4. The in and out oil pipe should keep a distance, or put a clapboard to separate them.
5. Regularly clean the oil filter and use enough capacity oil filters.
6. The oil box should guarantee enough oil, don’t lower than oil standard instructions line.
7. In order to ensure every parts of this system are full of oil, it is necessary to install a check valve in the pump exits and install a back pressure valve on the way of oil returning.
8. Develop the system of hydraulic, and set a vent plug or release valve.
The crawling resulted from the low rigidity of the drive. The air comes into the oil, some of them dissolve in oil, and the others are to be bubbles upon it. Due to the air has compressibility, it will make the hydraulic oil comes into being a obvious elasticity, and give rise to low rigidity of the drive.
Why does the air get in the oil? There must be some reasons:
1. Under the motion of components back and forth, it needs fit clearance. So the air will get in via it easier.
2. The hydraulic cylinder pipe connection looseness or bad sealing.
3. Bad precision of hydraulic component.
4. The installment of oil suction pipe is not good and suctioning the air, or blocked by dirt result in local vacuum.
5. The oil in not enough or oil suction pipe insert shallow.
6. Etc.
