4 Methods to Reduce Hydraulic Cylinder Failure and Repair Costs
By means of a product group, hydraulic cylinders are nearly as common as motors and pumps combined. Hence if you operate many hydraulic equipment, it’s possible that cylinder repair expenditure is animportant portion of your total operating charges.
According to certain studies, up to 25% of mechanical apparatus failures are failures of design. Uncertainty we apply this to hydraulic cylinders, formerly as many as one in four hydraulic cylinders are not sufficiently designed for the application they’re working in.
Hence if you have any cylinders that don’t last like they should you might need to address one or more of the subsequent four concerns:
#1. Bent Rods
The Bending of cylinder rods can be make happen by material strength or insufficient rod diameter, improper cylinder increasingpreparation or a grouping of all three. When the rod bends, distorting load is placed on the rod-seal. This increases leak and ultimately results in premature failure of the seal.
The acceptable rod loading for a cylinder in apresent application can be checked using the Euler formula.
#2. Ballooned Tubes
The cylinder tube ballooning is usually caused by inadequate wall thickness and/or material strength for the cylinder’s functioning pressure. When the tube balloons, the correct acceptance between the tube wall and piston seal is lost, permitting high-pressure fluid to avoid the seal. This high velocity fluid can wear down the seal and limited heating caused by the pressure drop through the piston decreases seal life-the end result of which is: early failure of the piston seal.
#3. Rod Finish
The superficial finish of the cylinder rod has animportant effect on the life of the rod seal. And if the surface roughness is too low, seal life can be condensed as a result of insufficient lubrication. If the surface roughness is too high, impurity ingression is increased and an improper level of leakage past the rod seal can outcome.
In the background of increasing cylinder service life, consider the cylinder rod’s surface as a wear-surface, lubricated and treat it consequently.
In several applications, the use of different rod surface treatment with greater mechanical properties to conventional hard-chrome plating, like as High Velocity Oxygen Fuel (HVOF) metal sprayingor nickel-chrome plating, can rise the service life of the rod and its seals.
#4. Inadequate Bearing Area
If the superficial area of the bearing bands in the gland and on the piston are inadequate to sufficiently support the side thrust transported to the cylinder, extreme load is placed on the piston seals and rod. This results in distortion of the seals, and eventuallytheir premature let-down.
Redesign or Repair?
To review the above: not all hydraulic cylinders are made equivalent. Consequently if you have any hydraulic cylinders that agoniserecurrent failure, it’s probable that design modifications are essential to disruption the vicious circle of failure and repair.