Hydraulic Systems - Loudoun County Public Schools

Hydraulic Systems - Loudoun County Public Schools

Hydraulic Systems The Basics Basic Principles Liquids:

Have no Shape Are incompressible Transmit force in all Directions, Equally Multiply Force F P A

w o H s e do ? k

r o ti w System Parts Advantages & Disadvantages of Hydraulics Advantages: Flexibility

Multiplication of Force Simplicity Compact Economy Safety Disadvantages: Efficiency Cleanliness

Primary Hydraulic Systems Open-Center Systems: Oil is pumped constantly, excess oil is returned to the reservoir. Closed-Center Systems: Oil is pumped on demand, control valve stops oil flow.

Open-Center Systems Simplistic Inexpensive Ineffective with Multiple Applications Variations of Open-Center Systems:

Open-Center with a Series Connection Open-Center with a Series Parallel Connection Open-Center with a Flow Divider Closed-Center Systems No Relief Valves Needed Application can be tailored by restricting flow Specialized functions have more support

Multiple functions can be used at the same time Variations of Closed-Center Systems: Closed-Center with Fixed Displacement Pump and Accumulator Closed-Center with Variable Displacement Pump Hydraulic Facts Mechanical-Hydraulic-Mechanical Inputs and Outputs

Three types of Hydraulic Energy: Potential, Kinetic, & Heat None are created or destroyed, only converted All energy input is converted into an output, gain (work) or loss (heat) A restricted flowing liquid creates heat This also causes a pressure drop

Hydraulic systems must be sealed to work Hydraulic Facts Oil takes the path of least resistance Oil is pushed into a pump, not drawn A pump does not create pressure, it creates flow. Pressure is caused by resistance to flow. These can produce the same power: High pressure & low flow

Low pressure & high flow Two basic types of hydraulics: Hydrodynamics Hydrostatics

Recently Viewed Presentations

  • Defining Online Bullying - download.microsoft.com

    Defining Online Bullying - download.microsoft.com

    Online bullying affects nearly one in four children aged 8-17. Thirty-seven percent report being bullied online. Online bullying can take the form of children being mean or unfriendly, calling others mean names and making fun of or teasing others.
  • Avances del proyecto LEARN Datos de Investigación ...

    Avances del proyecto LEARN Datos de Investigación ...

    Avances del proyecto LEARN. Datos de Investigación: Implementación de políticas y estrategias en América Latina y el Caribe. Wouter Schallier. Jefe, Biblioteca Hernán Santa Cruz
  • muhammetarucu.files.wordpress.com

    muhammetarucu.files.wordpress.com

    Kaspersky. Diğerleri. Kaspersky Anti-VirusPersonal, kullanıcı dostu arayüzü, güçlü tarama ve koruma özellikleri, e-posta kontrol özelliği ile bilgisayarınızı özellikle internetten gelen virüslere karşı koruma sağlıyor. Yaklaşık 2 milyondan fazla zararlı ve virüsü tanıma özelliği var. Anti-Vir (Avira) AVG. BitDefender
  • The Woolsworth Sit in

    The Woolsworth Sit in

    Integration of "Ole Miss" This event happened at the University of Mississippi. It happened in September of 1962. James Meredith was an air force veteran who wanted to attend the University of Mississippi
  • Indices, Logarithms and Quadratic Equations

    Indices, Logarithms and Quadratic Equations

    Content. Laws of Indices. Some Properties of Indices. Definition of Logarithms. Some Properties of Logarithms
  • Go Create The Next Great Website! - Research | USC

    Go Create The Next Great Website! - Research | USC

    Back MD, et al.: Facebook profiles reflect actual personality, not self-idealization. Psychol. Sci ... From Michael Bernstein, professor of Comp. Sci. at Stanford U "Hammering ethical protocols designed for laboratory studies onto internet experimentation is fundamentally misguided" ...
  • スライド 1

    スライド 1

    Model bias and VarBC. Change of observing system can be a cause of a jump in a time series. Variational Bias Correction is a superior method to remove such "jumps" but the field converges asymptotically to the model climatologywithout anchoring...
  • Theme and central/main idea - Campbell County Schools

    Theme and central/main idea - Campbell County Schools

    Identify theme and strategies of finding theme within a story. Identify central idea and main idea . What are similarities and differences between the two? What strategy do I want to use to find central/main idea? How are theme, main...