arpit presentation
TRANSCRIPT
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PRESENTED BY
ARPIT THOMAS
09ME08B.TECH FINAL YEAR
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INTRODUCTION
HYDRAULICS IS BASED ON A VERYSIMPLE FACT OF NATUREYOUCANNOT COMPRESS A LIQUID
AIRCRAFT HYDRAULICS IS DEFINED ASA SYSTEM WHERE LIQUID UNDERPRESSURE IS USED TO TRANSMITENERGY
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Pascals Law
Pressure exerted on a fluid in an enclosed
container is transmitted equally and
undiminished to all parts of the container and
acts as right angles to the enclosing walls.
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BASIC COMPONENTS
RESERVOIR
POWER PUMPS
CHECK VALVES SELECTOR VALVES
ACCUMULATOR
PRESSURE REGULATOR
HAND PUMPS
ACTUATOR
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THE FUNCTION OF THE
HYDRAULIC SYSTEM POWER
PUMPS IS TO CHANGEMECHANICAL HORSEPOWER TO
HYDRAULIC HORSEPOWER
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Medium volume of fluid
under pressure.
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Moves a large
volume of fluid
under low pressure
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THESE ARE HYDRAULICDEVICES WHICH PERMIT FLOW
OF FLUID IN ONE DIRECTION
ONLY
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HYDRAULIC FLUIDS The fluid used in aircraft hydraulic systems is
one of the systems most important parts.
The fluid must flow with a minimum ofopposition.
Must be incompressible
Good lubricating properties Inhibit corrosion and not attack seals
Must not foam in operation
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ACCUMULATOR
All accumulators consist of a high strength
container divided by some form of movablepartition into toe sections, or compartments.
One compartments connected to the hydraulic
pressure manifold, and the other is filled with
compressed air or with nitrogen.
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Accumulators
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ACTUATOR
THE FUNCTION OF ACTUATING CYLINDER IS TOTAKE THE PRESSURE AND HYDRAULIC FLUIDFLOW AND CHANGE THEM INTO EITHER
LINEAR OR ROTARY MOTION
TYPES OF ACTUATOR
SINGLE PISTON ,SINGLE ROD
SINGLE PISTON ,DOUBLE ROD
DOUBLE PISTON DOUBLE ROD
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PRESSURE REGULATOR
PURPOSE
TO REDUCE THE LOAD ON THE HYDRAULIC
PUMP
TO KEEP THE HYDRAULIC PRESSURE WITHIN THEOPERATING RANGE
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HAND PUMPS
THE HAND PUMP CONVERTS THE HUMANPOWER TO HYDRAULIC HORSEPOWER
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ADVANTAGES
Two major advantages
Ease with which force can be transmittedover large distances and into sealed
compartments.
Large gain in mechanical advantage made
possible by varying the size of pistons.
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IT IS LIGHTER IN WEIGHT THAN ALTERNATE
EXISTING SYSTEMS
IT IS RELABLE
IT CAN BE EASILY MAINTAINED
IT CAN DEVELOP UNLIMITED FORCE AND
TORQUE
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ANY
QUERIES???