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Four Common Reasons Mechanical Failure Occurs In Hydraulic Cylinders
Eddie Barnes
It's important for those who work with hydraulic equipment to understand that hydraulic cylinder failure could be costing their industrial operation a great deal of money.
Hydraulic cylinders are one of the most important components of hydraulic equipment. As such, they are responsible for a great deal of the repair costs that are seen in industrial operations involving hydraulic equipment.
You can minimize the financial toll that cylinder failure is taking on your operation by making sure that your company's cylinders don't have any of the following deficiencies:
Inadequate bearing surface area
There needs to be enough bearing surface in hydraulic equipment to allow for the adequate transfer of side thrust to the cylinder.
If the bearing area is inadequate, there will be too much stress on the seals. Seals will therefore be more likely to deform over time, and deformed seals will eventually fail if the underlying cause of inadequate bearing surface is not addressed.
Rods that are susceptible to bending
If cylinder rods begin to bend, they will deform that loan that is put on the equipment's rod-seal. This means that leakage will be more common in hydraulic equipment and can eventually cause a hydraulic seal to completely fail.
The most common causes of bent cylinder rods include a rod diameter that is too small or the improper mounting of the cylinder.
An excessively smooth or rough rod finish
The finish on a cylinder rod should feature a certain level of roughness that prevents premature seal failure due to poor lubrication of the cylinder. However, if the finish is too rough, it is possible for contaminants to ingress and leakage to occur that compromises the integrity of the seal.
You should consider that the rod finish of your hydraulic cylinders is a wear-surface that needs to be properly lubricated to function well. Often, nickel-chrome plating of the rod and seals can extend their life and alleviate any mechanical problems caused by rod finish.
Tubes that are susceptible to ballooning
If the wall of a hydraulic cylinder tube is not thick enough, the tube could be susceptible to ballooning. Another possible cause of ballooning in the cylinder tube is weak material strength that cannot stand up to the equipment's operating stress.
A tube that balloons will create an inadequate or nonexistent tolerance that will let fluid get through the hydraulic seal. Over time, the seal will erode and overheat as this fluid repeatedly gets through. Eventually, the seal will completely fail and require repair.
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