A hydraulic cylinder is used to create a force that moves in one direction, and it is basically a tube-shaped cylinder that has a rod coming out of one end, and a piston attached to that rod. When oil is forced into the cylinder tube, the rod is extended and retracted, almost acting like a pump.
Basically, it is used to enhance motion, particularly on heavy machinery, such as diggers, trucks, and construction equipment. If something needs to move a heavy object in one direction and only that one direction, then the hydraulic cylinder is the thing to power it. Cylinders are very effective as a lifting shape, and that’s why they are used in countless machines.
Hydraulic seals are also used to keep the liquid that flows through the cylinder out of the piston and the rod, and if the seal leaks or breaks then the machine can start to lose power. Seals are often custom created for the hydraulics that takes pressures and the temperature of the machine into account. Without them, then the fluid couldn’t be turned into power.
The seals can either be static, meaning they don’t move with the cylinder and simply seal, or they are dynamic and move along the rod as it does, but both have the same function of keeping the fluid power in its place.
Without hydraulics, most heavy machinery either wouldn’t be able to do its job or would need to be powered by more expensive systems to get the same result. So hydraulics are the cheapest and most effective way to power machinery in the construction, agricultural, and industrial businesses.
Everything from a dump truck to a press to an excavator is all powered by the simple science of hydraulics, and without them, the world would be a much less advanced place.