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Fluid Power. What is Fluid Power?. Fluid power is energy transmitted and controlled by means of a pressurized fluid, either liquid or gas. Hydraulics uses pressurized liquid, such as oil or water. Pneumatics uses compressed air or other neutral gases.

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What is Fluid Power?

  • Fluid power is energy transmitted and controlled by means of a pressurized fluid, either liquid or gas.

  • Hydraulics uses pressurized liquid, such as oil or water.

  • Pneumatics uses compressed air or other neutral gases.

  • Fluid power can be effectively combined with other technologies through the use of sensors, transducers, and microprocessors.


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How Does Fluid Power Work?

Pascal's Law expresses the central concept of fluid power:

"Pressure exerted by a confined fluid acts undiminished equally in all directions."


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An Example

  • An input force of 10 pounds on a 1-square-inch piston develops a pressure of 10 pounds per square inch (psi) throughout the container.

  • This pressure will allow a 10-square-inch piston to support a 100-pound weight.

  • The forces are proportional to the piston areas.


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The Advantages

  • Multiplication and variation of force

  • Easy, accurate control

  • Multi-function control

  • High horsepower, low weight

  • Low speed torque

  • Constant force or torque

  • Safety in hazardous environments


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Fluid Power Applications

Mobile

  • Backhoes

  • Graders

  • Tractors

  • Truck brakes

  • Suspensions

  • Spreaders

  • Highway maintenance vehicles


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Fluid Power Applications

Industrial

  • Metalworking equipment

  • Controllers

  • Automated manipulators

  • Material handling

  • Assembly equipment


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Fluid Power Applications

Aerospace

  • Landing gear

  • Brakes

  • Flight controls

  • Motor controls

  • Cargo loading equipment


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Image Resources

Microsoft, Inc. (2008). Clip Art. Retrieved December 10, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx

National Fluid Power Association (NFPA). (n.d.). What is Fluid Power? Retrieved December 10, 2008, from http://www.nfpa.com/OurIndustry/OurInd_AboutFP_WhatIsFluidPower.asp