2023-12-19
Ways To Reduce Damage To Hydraulic Cylinders
Design Reasons: Unreasonable design of structural size can lead to damage in hydraulic cylinders. For example, if the flange height is too small or the flange outer diameter is too large, it can result in a high comprehensive stress response. This excessive stress can cause damage to the hydraulic cylinder.
Cylinder Wall Cracks: Cracks in hydraulic cylinders often appear on the inner wall and gradually propagate outward. These cracks typically develop longitudinally or at an angle of approximately 40 degrees to the generatrix of the cylinder wall. The cracks may be a result of factors such as material fatigue, stress concentration, or improper manufacturing processes.
Flange Part of the Cylinder: The flange region of the hydraulic cylinder can experience issues as well. Initially, row lines may appear on the outer surface of the transition arc of the cylinder flange. Over time, these row lines can expand both circumferentially and towards the inner wall, or even reach the nail hole. In severe cases, the flange along the transition arc may develop circular cracks that lead to partial detachment or falling off of the flange.
Cylinder Bottom: The bottom of the hydraulic cylinder can also be susceptible to damage. A circumferential crack may initiate on the inner surface of the transition arc at the bottom of the cylinder and gradually propagate towards the outer wall, potentially resulting in cracks or other forms of damage.
Cavitation: Cavitation refers to the formation and collapse of vapor bubbles in a flowing liquid due to rapid pressure changes. In hydraulic cylinders, cavitation can cause honeycomb pitting or erosion on the inner wall, particularly in the inlet hole region. This cavitation-induced damage can compromise the integrity and performance of the hydraulic cylinder.
It is essential to consider these potential failure modes during the design, manufacturing, and operation of hydraulic cylinders.