Principals Of Hydraulic Power
  • Static Fluid Pressure
    • A column of liquid produces pressure that is directly proportional to the height of the column and it in no way depends upon either the shape of the container or the amount of liquid the container holds.
      • The force exerted by the column of water is equal to the pressure acting on each square inch times the number of square inches.
      • It makes no difference as to the shape or size of the vessel that contains the liquid; it is the height of the column that is the critical factor.
  • Pascal's Law - Any increase in the pressure on a confined liquid was transmitted equally and undiminished to all parts of the container. The pressure acts at right angles to the enclosing walls of the container.
  • Relationship between pressure, Force and Area
    • Pressure - is a measure of the amount of force that acts on a unit of area.
      • Is measured in pounds per square inch (psi)
    • The relationship of Force, Pressure and Area can be expressed in the formula: Force=Area*Pressure
  • Relationship between Area, Distance and Volume
    • The Relationship of Area, Distance and Volume can be expressed in the formula Volume=Area*Distance
  • Mechanical Advantage in a Hydraulic System
    • Hydraulic System advantages:
      • Ease with which force can be transmitted over large distances
      • Large gain in mechanical advantage made possible by varying the size of pistons.
    • Mechanical advantage is achieved in a Hydraulic system by having an output piston that is larger than the input piston.
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