How To Reduce Hydraulic Cylinder Failure

 Hydraulic cylinders are essential pieces of hydraulic engineering equipment. They are considered as common as pumps and motors combined, so if a hydraulic cylinder fails it can impact your entire operation. Reducing cylinder failure within hydraulic systems is important to avoid unnecessary lengthy equipment down time.



BENT RODS

Bent rods are a common cause of rod seal failure. Bending of hydraulic cylinder rods can be caused by insufficient rod diameter or material strength, improper cylinder mounting arrangement or a combination of all three. Once a rod bends, excessive load is placed on the rod seal resulting in premature failure of the seal. we have the engineering expertise to calculate the permissible rod loading for cylinders in existing and new applications.

BALLOONED BARREL TUBES

Ballooning of cylinder barrel tubes is usually caused by insufficient wall thickness and/or material strength for the cylinder’s operating pressure. Once the tube balloons, the correct tolerance between the piston seal and tube wall is lost and high-pressure fluid bypasses the seal. This high fluid velocity can result in erosion of the seal including localized heating caused by the pressure drop across the piston thus resulting in reduced seal life.

INSUFFICIENT BEARING AREA

The internal bearing areas in the gland and at the piston are critical in carrying the thrust transferred to the cylinder. Insufficient internal bearing areas will result in excessive load being placed on the rod and piston seals. This results in deformation and ultimately premature failure of the seals.

ROD FINISH

The surface finish of the cylinder rod can have a dramatic effect on the life of the rod seal. If the surface roughness is too high, contaminant ingression is increased and an unacceptable level of leakage can result.
In the context of extending hydraulic cylinder service life, consider the surface of the cylinder rod as a lubricated wear surface and treat it accordingly. The installation of a boot to protect the rod surface and seals from impact damage and contaminants can also aid in extending cylinder life.

REGULAR SERVICE & MAINTENANCE

Regular service and maintenance of hydraulic systems is essential for removing contamination that will aid in the smooth running and longevity of major hydraulic equipment especially hydraulic cylinders.Datong Hydraulic has a dedicated team of service technicians that can aid in servicing and maintaining hydraulic systems to ensure cylinders continue to work to perfection.

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