unit 1 an introduction of hydraulic system.ppt

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AU-HYD-10-01Mt CD-20-00 Page 1 of 15 Pages Thai-GermanInstitute สสสสสสสส - สสสสสส INTRODUCTION Fundamental of Hydraulics Control System

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Unit 1 An Introduction of Hydraulic Systems power point pres.

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Fundamental of Hydraulics Control SystemAU-HYD-10-01Mt
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Mechanical Power
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Mechanical Power Transmission
Hydraulic Power Transmission
pressurised fluid to transmit power between the
place where the power is generated.
QUESTION:
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small weight and size.
the direction valve…
cap end of the cylinder.
3. The piston rod extends.
4. Exhaust oil is pushed out
of the rod end directed
to the tank.
is directed to the rod end
of the cylinder….
A hydraulic actuator can be reversed
instantly while in full motion without damage.
7. Exhaust oil from the cap
end is direct to tank.
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10 gallons per minute (gpm)…..
2. and this volume is 10 gallon…
3. the piston will move this
far in one minute.
6. the actuator receives only 5
gallons and travels only half
as far in one minute.
7. Excess 5 gal. is
divert over pressure
immediately when the load is reduce.
Stalling an electric motor will
cause damage or blow a fuse.
During stall the relief valve simply
diverts delivery from the pump to
the tank.
setting, pump delively is directed
to tank.
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1. Pressure and flow losses in pipe and control devices
(fluid friction).
1. Pressure and flow losses in pipe and control devices
(fluid friction).
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Too high, or too low a viscosity could present problems
of performance, leakage,energy usage, etc.
The viscosity of all fluid
used in hydraulic system
is affected by variations
1. Pressure and flow losses in pipe and control devices
(fluid friction).
3. Leakage problems.
1. Pressure and flow losses in pipe and control devices
(fluid friction).
3. Leakage problems.
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1. Stationary Hydraulic
1. Stationary Hydraulic
2. Mobile Hydraulic