Hydraulic Equipment

Hydraulic equipment and technology is something that we are all at least passingly familiar with. If we think about it, we know that the principles of hydraulics are applied to make many common machines work. For example hydraulics are used in agricultural equipment, giant earth moving and mining machines, they are used to steer and stabilize giant ocean liners, help airplanes climb and turn, and make the brakes in our cars work. So hydraulics can provide great force, are obviously very adaptable and used in all kinds of applications, but how do they actually work?

What is this hydraulics stuff?

Hydraulics is based on a very simple fact of nature - you cannot compress a liquid. You can compress a gas (think about putting more and more air into a tire, the more you put in, the higher the pressure). If you're really strong you can compress a solid mass as well. But no matter how much pressure you apply onto a liquid, it isn't possible to compress it. Now if you put that liquid into a sealed system and push on it at one end, that pressure is transmitted through the liquid to the other end of the system. The pressure is not diminished.

Hydraulic Tools

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Hydraulic Pump

hydraulic pumps featured with ultra-pressure, small, safe and efficiency, are widely used in many fields using oil pressure for driving. E.g., with assistance of different fixtures and equipments, it can realize many basic functions such as pushing, stretching, expansion, clamping, bending, lifting, squeezine etc., and it is also well used in many engineering works such as reinforcing steel compression, reinforced concrete for pile driving, pier foundation test etc.

Hydraulic Wrench

Compact design, Few moving parts means durability and low maintenance .Its raw material is a high strength and ultra-light space material and the strength and toughness of the fuselage are strengthened comprehensively. A precise axial driving hydraulic wrench, A precise ratchet adopted with accuracy ±1% The fast axial driving hydraulic wrench, has realized full automatically control, providing continuous locking or unlocking, and the speed is two times fast as other similar wrenchs. The simplest axial driving hydraulic wrench, full-automatically, and single operation

Hydraulics is Old Stuff

The basic concept of hydraulics is not new. The Greeks understood about using water to provide lift and force, and the name hydraulics comes form the Latin word for water - "HYDRA". In the Middle Ages, Leonardo da Vinci formulated the basic principle of hydraulics called continuity and Galileo experimented with hydraulics. Hydraulics were even used during the construction of the Eiffel Tower in Paris in the late 1880's. Hydraulic jacks were used to level the tower and align the metal girders to an accuracy of 1 millimeter.

Today most hydraulic systems utilize oil rather than water but the principle is the same. You cannot compress a liquid, and a force that is applied at one point is transmitted to another point by that incompressible fluid. Because of its liquid nature, hydraulic systems can transmit force through pipes of any shape and length, so the force can be applied at one central point and transmitted efficiently to another point or to multiple points far away. Think about the master cylinder in you car's brakes and how, by stepping on the brake pedal, you apply stopping pressure on the brakes on all four wheels.

Physics

Basic physics tells us that we can trade off force for distance in all mechanical systems. In a hydraulic system, we do this by changing the relative size of the pistons at each end of the system. For example, a small piston moving a relatively large distance (say a foot) will exert pressure on a larger piston at the other end. The force will be enough to move a heavy weight a small distance (much less than a foot). Engineers and physicists can calculate exactly how much distance needs to be traveled and the relative sizes of the pistons required to move a particular weight. This is the principle that allows relatively small cylinders to move gigantic heavy pieces of metal.

Totally understanding hydraulics is very complicated, but a basic understanding of the principle of how it works is actually very straightforward.