What is a Hydraulic Cylinder? How it Works, Types, Uses

How a Hydralic Cylinder Works
The hydraulic cylinder operates through fluid pressure which generates linear movement functions. The hydraulic pressure that enters one side of the cylinder presses against its piston which extends the attached piston rod. A force generated by pressurised oil from one side pushes fluid contents through the return line on the other side. The rod retraction occurs through the entrance of oil at the opposing side with simultaneous draining of fluid from the initial chamber. Through its alternating fluid motion, the cylinder transforms hydraulic force into precise mechanical force to execute heavy load movements. An equal force transmits throughout the sealed system because of Pascal's principle within the fluid system.

Types of Hydraulic Cylinders
There are various designs of hydraulic cylinders, and each variant is built for a particular use:

Single-Acting Cylinder: Uses hydraulic pressure to extend the piston, while an external force retracts it.
Double-Acting Cylinder: Hydraulic pressure generated from the machine moves the piston in both directions.
Telescopic Cylinder: The apparatus is made up of several successively extending nested stages.
Tie-Rod Cylinder: It secures end caps coupled with threaded tie-rods. This device requires little effort to maintain and repair.
Welded Cylinder: End caps have a sturdy, leak-proof design since they are welded to the barrel. They are utilized in demanding applications.