How to reduce the degree of damage to the hydraulic cylinder

How to reduce the degree of damage to the hydraulic cylinder

Hydraulic press working cylinder heavy load, frequent work, often due to design, manufacturing or improper use, premature damage. Most of the damaged parts of the hydraulic cylinder in the flange and the cylinder wall connected to the arc part, followed by the cylinder wall to the cylinder bottom of the transition of the arc part, a few in the cylinder cylinder wall cracks, but also due to severe cavitation and damage. From the use of the situation, generally in the damage have been subjected to a high number of work loading, cracks are gradually formed and expanded, belonging to the fatigue damage.

      Factors affecting the working life of hydraulic cylinders are manifold, to be analyzed in the context of the specific situation, but summarized in the following aspects:

      1, cylinder cylinder wall. General cracks selected to appear in the inner wall, and gradually develop outward. Column lines to the outward development, cracks are mostly longitudinal distribution, or with the cylinder wall bus at an angle of 40 degrees.

      2, cylinder flange part. Cracks first appear on the outer surface of the cylinder flange at the excessive arc, and then gradually expand to the circumference and to the inner wall, or the cracks expand to the nail holes, so that the flange is partially dislodged, and in some serious cases, the flange will be cracked along the arc of the transitional whole circle and dislodged.

      3. Cylinder bottom. Cracks start to appear on the inner surface of the transition arc at the bottom of the cylinder, and gradually expand to the outer wall and even crack through.

      4, cavitation. Hydraulic cylinders have also been damaged by cavitation resulting in honeycomb pockmarks in the inner wall of the entry hole is prone to cavitation.

      5, design reasons. Structure size design is unreasonable, such as flange height is too small or flange outer diameter is too large, so that the integrated should be too high and damaged.