by Erik Devaney
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Hydraulic systems are systems that move pressurized fluids through tight spaces, such as pipes and tubes. Many modern machines and other types of equipment use hydraulic systems, such as automobiles. However, you can also find them existing in nature.
Hydraulic vehicle braking systems stood out among automobile manufacturers during the 1930s. They are multi-piston systems, which means that they transmit force between two or more pistons. According to the PDH engineer, when you step on a hydraulic brake pedal, the force compresses the first piston, known as the inlet piston, which in turn pushes the rupture fluid through hoses and tubes. The fluid pressure causes two other pistons, known as outlet pistons, to push out. These pistons are attached to brake shoes, which apply friction to the walls of the brake drums, slowing down the rotation of the wheels.
Workers use hydraulic jacks to lift extremely heavy objects, such as cars, building materials, and even entire buildings. According to Phys Link, these cats use a basic hydraulic principle, known as Pascal’s Principle, which the French scientist Blaise Pascal developed in the 17th century. The principle states that if you apply force to a liquid inside a small cylinder, you can generate a greater force from that same pressure in a larger cylinder. So when you push down on the pump or lever of a hydraulic jack, you are squeezing fluid into a small cylinder and pumping it into a larger cylinder through a tube. The resulting pressure is great enough to lift incredibly heavy objects, yet the relative force you need to apply is small.
Dental and hairdressing chairs
According to the London Science Museum, the American dentist Basil Wilkerson invented the adjustable hydraulic chair in 1877, which many people, particularly dentists and barbers, still use today. The chairs work like hydraulic pumps. To raise one, and its seated occupant, it is necessary to push a lever, which in turn compresses the liquid into a small cylinder. The largest cylinder, in this case, is attached to the bottom of the seat. Then the force it generates pushes the chair up.
The human cardiovascular system, as well as the circulatory systems of many other organisms, are also good examples of hydraulic systems. In this type of natural hydraulic system, the heart acts as a central pump, delivering oxygen to the body through a pressurized fluid, the blood. This fluid travels through confined spaces: arteries and veins.