 General Information  (14.4 MB) – Matthew Bono  CLF Work and Power  CLF Uses for Work and Power

 California Agriculture Mechanics Pathway Standards  B11.0: Students understand the principles and applications of various engines and machinery used in agriculture  B11.4- Know the theory and operation of mobile hydraulic systems and power take-off systems

Energy transmitted and controlled by means of a pressurized fluid, either liquid or gas.

Common Description  Fluid Power  Doing work using transmitted fluids or gasses

Work and Power  What are Work and Power  Work  Using force to act on an object over a distance.  Pushing a car up a hill  Power  The rate at which work is performed  Pushing a car up a hill faster than someone else

Work and Power  In Hydraulics  Hydraulic systems are a way to do work and use power to move or stop objects.  The systems can increase, speed, power, and are maneuverable

Common Examples of Hydraulic Systems  Automobile Brakes  Heavy Machinery  Airplanes  Trains

Common Examples  Automobile Brakes Hydraulic Fluid Pressurized by foot pedal and booster closes piston, slows rotor and wheel

Common Examples  Heavy Machinery

Common Examples  Airplanes  Planes use hydraulics to fly, land and steer Red Lines and Blue Lines control different surfaces using different systems but same control lever

Common Examples  Trains  Trains stop, or not, using air brakes, which are considered hydraulics also

Other Common Examples  Trains  Where else could we use hydraulic power?  Thinks outside the box.

Principle of Transmission of Fluid-Pressure “Where there is an increase in pressure at any point in a confined fluid, there is an increase at every other point in the container.“

Theory Demonstrated Key F1- Force 1 F2- Force 2 A1- Area 1 A2- Area 2 Blue area is fluid acting on both pistons in the closed system

Theory Explained Hydraulic System typically fluid is pumped into a confined space in order to make something move. This movement can be to turn a motor or extend or retract a ram or piston. Moving either piston in the picture would move the other. F1= Force 1 F2= Force 2 A1= Area 1 A2= Area 2

Theory Explained If F1=F2 the System has No Movement In Real life these systems usually involves movement The F1=F2 pistons are connected by the same fluid If the fluid moves equally, piston 1 moves further but with less force due to less surface area F1= Force 1 F2= Force 2 A1= Area 1 A2= Area 2

Parts of a Closed System A. Reservoir B. Filter C. Pump D. Valve E. Cylinder F. Lines

How It Works 1.Motor Spins Pump 2.Pump Moves fluid a. Out of reservoir b.Through filter c.Through Pump c. Into valve 3.Valve directs fluid to ram 4.Pressurized side of ram moves 5.Fluid on other side of ram returns to reservoir

How to Power the System Elbow Grease- like a automotive jack Electric Motor Fueled Motors gasoline, diesel, aviation anything else System Design Flow Rates Pressures Location Point of Action

As motor power goes up the pump has more power to move fluid This can increase flow rate or pressure

How it works Flow Rate Hydraulic systems rely on filling a given area with fluid The more fluid you pump into the area the faster the implement moves If your trying to float a rubber boat in a swimming pool what will do it faster a garden hose or a fire hose

How it works Pressure Hydraulic systems like the jaws of life can create incredible amounts of force What shoots further, water from a hose spraying a cone or spraying a jet

Advantages  Force Multiplier –  Automobile Brakes  Controllable-  variable speed and power  High power low weight-  Especially air powered  Very Mobile-  Harvesting Equipment  Possibilities-  Diesel Hydraulic Hybrid Delivery Trucks  Roller Coasters

Force Multiplier – Automobile Brakes  The force of your foot can stop an entire car, with help from hydraulics

Controllable-  Large harvesting equipment can do dozens of things at one time all with hydraulic power

Controllable- Cotton Picker Header Each row of cotton goes through the picking zone Each spindle moves independently of the others while machine moves through field, blows lint into hopper and discards waste

High power low weight

Very Mobile  The jaws of life in the last slide are used by hundreds of rescue outfits across the US and are readily carried everywhere they go

Possibilities- Diesel Hydraulic Hybrid Delivery Trucks This truck showed a 60To 70% increase in fuel economy and reduced emmisions by more than 40% and could reduce costs to consumers and companies while reducing the pollution.

Hydraulic systems are in everything from aircraft to theater performances in Las Vegas. Someone had to design, build and maintain all these systems, why couldn’t it be you?

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