This article elaborates on the common problems of hydraulic cylinder, The main faults of hydraulic cylinder are crawling, insufficient thrust, working speed decreasing and even stopping.
Generally, crawling occurs at low speed. The main reason is that the air accumulated in the cylinder is not removed completely. In addition, excessive or uneven mechanical friction can also cause crawling. For example, if the piston and the piston rod are not concentric, the piston rod is full-length or partially bent, the cylinder bore is not straight, the cylinder body is drum shaped or has a large taper, the smoothness in the cylinder is reduced or roughening occurs, the installation accuracy of the cylinder is out of tolerance, the screw nuts at both ends of the piston rod are tightened too tightly to make its concentricity poor, and the excessive friction force of the oil seal is too large, etc., it will cause crawling.
The fit clearance between the piston and the cylinder block of the hydraulic cylinder is too large, the assembly size of the O-ring is not correct, there is no pre-compression shrinkage or the high and low pressure cavity communication is caused by wear, bite, aging and other phenomena. The partial and total wear of the oil cylinder, poor linearity and too high oil pressure and temperature will cause insufficient working pressure of the oil cylinder.
Common Problems of Hydraulic Cylinder: The reasons why the speed of hydraulic cylinder drops or stops are as follows: there are too many impurities in the oil, which makes the piston of hydraulic cylinder stuck or the friction force is too large, etc. These reasons will not only increase the no-load pressure and reduce the effective traction force of the cylinder, but also cause the cylinder to jam in serious cases.
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