Dieseling of the Hydraulic Cylinders resolved?
Know how to avoid one of the most common reasons for the failure of Hydraulic Cylinder.
If you use any type of hydraulic system, it is significant to know about the various issues, which can impede the performance of several hydraulic elements within a system. This also includes hydraulic system dieseling effect.
The word dieseling is actually a reference used for the process of combustion within a diesel engine. For the standard combustion engine, a spark is required that can combust the fuel. Yet, the only pressure is enough for causing combustion within the diesel engine. The same principal is applied in hydraulic system. We will explain how dieseling effect happens in the hydraulic cylinder.
At times, when the double-acting hydraulic cylinders extend or retract, the volume of hydraulic oil required over the rod is greater than that has been supplied from the hydraulic pump. If this occurs, it provides negative pressure over the cylinder rod. The negative pressure sucks the air past from the seals of the rod as well as in the cylinder. Now, when a freshly contaminated liquid in the cylinder gets pressurized over the new stroke, it may combust or explode. This effecet destroys the seals and can crack or deform the cylinder tubing.
How can you prevent the Dieseling effect?
To avoid dieseling, we need to tackle the faults that become the reason for air to penetrate into a hydraulic cylinder.
First, ensure that both chambers of hydraulic cylinder are completely emptied from the air in commissioning. If not, potential air entrance will automatically lead towards dieseling effect.
Second, the defective float valve is another reason that is due to air contamination. This occurs in equipment such as hydraulic excavators. In this application the float valve should consider the boom to be brought down quickly in its own load and a cylinder to likewise be retracted simultaneously. The valve should permit the liquid from the cylinder piston to be guided with rod side priority instead of sent directly to the tank. If a valve does not function properly or incorrectly set, you finish up with the negative pressure, so with dieseling.