Post on 01-Jan-2016
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HYDRAULIC
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Hydraulic?????. What do we mean by hydraulic?
Hydraulic systems are used in modern production and
manufacturing installation.
By hydraulic, it means the generation of forces and
motion using hydraulic fluid.
The hydraulic fluids represent the medium for power
transmission.
HYDRAULICS SYSTEM
ADVANTAGES DISADVANTAGES
Transmission of large
forces using small
component
Precise position
Start-up under heavy load
Smooth operation
Sensitivity to dirt
Danger result from
excessive pressures
Temperature dependence
(change in viscosity)
• Construction machinery
• Excavator
• Elevating platforms
• Lifting & conveying devices
• Agricultural machinery
• Injection moulding
• Presses machine
APPLICATIONS OF HYDRAULICS SYSTEM
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Design Of A Simple Hydraulic System
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Pressure due to external forces
F
P
If a force acts
on an enclosed liquid,
a pressure P is produced
which extends throughout
the whole of the liquid.
The same pressure applies
at every point of the closed
system.
Basic Hydraulic Principles
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P Force(N)
Area(m2)
=
PASCAL’S LAW The property of a liquid to transmit pressure equally throughout
itself is known as “Pascal’s Law ”,in honor of Blaise Pascal who
discovered it.
The mathematical expression which describes Pascal’s Law is
the same as that used to describe any pressure:
(Pa)
P = Pressure, F = Force and A = Area
Variations of Pascal’s Law
• Pressure = Force
divided by area
• Force = Pressure times
area
• Area = Force divided
by pressure
A
FP
APF
P
FA
P A
F =Force
P = Pressure A = Area
F
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Design Of A Simple Hydraulic System
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Design Of A Simple Hydraulic System
Go to HT- Other Application
Total power output generated in
‘HYDARULIC SYSTEM’ depending on the
1. Fluid flow,
2. The overall efficiency,
3. Pressure drop
F out
Q
A out
p p
p
PRESSURE DROP
10,000#
1000 PSI 1700 PSI
10 In 2
1500 PSI
The hydraulic system is better and
EFFICIENT than the
pneumatic system in HEAVY
EQUIPMENT construction
because the hydraulic system
used fluid as a medium.