Fluid Power
Hydraulic Solutions

Principal of operation.

Why the use of hydraulics for heavy machine's automation?

 

Hydraulic technology is the most practical solution to produce massive amounts of force at a lower cost and more efficient operations.

 

How does it work?

 

Most of the hydraulic operations are based on the principal of Pascal’s Law that states: "pressure exerted anywhere in a confined fluid is transmitted equally in all directions throughout the fluid."



FIGURE 1.1




Keeping in mind the formula F = P x A 

 

Where:

F = Force (pounds)

P = Pressure (psi /pounds per square inch)

A = Area (square inches)

 

By utilizing the basic hydraulic principals it is possible to transmit and/or multiply force to move heavy loads efficiently.

 

(Figure 1.2) Assuming we have confined fluid into two different cylinder areas connected to each other; we can apply 100 pounds of force against a smaller 1 in2 cylinder area to provide a pressure of 100 psi.  When the 100 psi of pressure is transmitted to a 10 in2 cylinder area, it is then possible to lift 1,000 pounds of weight with only an initial 100 pounds effort.

 

100 psi x 1 in2 = 100 pounds (applied force)

100 psi x 10 in2 = 1,000 pounds (load)

 

(FIGURE 1.2) By utilizing the hydraulic advantage it is possible to multiply the input force to obtain a higher output force, however you are still sacrificing a range of movement as the fluid displacement between both cylinders will be the same.

 

1 in2  (area) x 10 INCHES (stroke) = 10 in3  of fluid displacement for the smaller cylinder.

10 in2 (area) x 1 INCH (stroke) = 10 in3 of fluid displacement for the larger area cylinder.

 

FIGURE 1.2