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Basic 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 long 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 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 extremely heavy loads. 

 

 

 

Example

 

If D = 2 ft then Force = 500 lbs.

If D = 10 ft then Force = 100 lbs.

If D = 20 ft then Force = 50 lbs

 

 

 

 

 
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  Basic Hydraulics At Work  
  Hydraulics is based on a very simple fact of nature - you cannot compress a liquid. Now if you put that liquid into a sealed system and push on it at one end, that pressure is transmitted through the liquid (confined/sealed vessel) to the other end of the system. The pressure is not diminished.  
     
  Hydraulic Principles  
  Pressure is stress that is exerted uniformly (or the same way) in all directions. Pressure is measured in units of force applied per unit of area.  
     
  Cylinder Terminology  
  Force exerted on a square inch of area of a confined liquid is transmitted at every angle to every square inch of area of the interior of the vessel.  
     
  Basic 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. Click on the link above for complete details.  
     
  Hydraulic Formulas  
  The basic principle behind any hydraulic system is very simple Click on the link above for complete details.  
     
     
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