Transcript Hydraulics and use of liquid pressure

Konsep Hidrolik
dan penggunaan tekanan pada
fluida
Sifat penting tekanan pada
fluida
• Fluida akan meneruskan tekanan ke
semua bagian , dengan mengabaikan
bentuk wadahnya
• Sebuah gaya dapat diterapkan dapat
diterapkan kapan saja di inginkan
• Gaya dapat berlipat bergantung luas area
kontak dari piston yang di pergunakan
untuk menekan air
Penerapan penggunaan hidrolik
•
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Rem Mobil
Dongkrak
Fork lift
Lift
Bulldozer
Kamera Televisi
Bagaimana Rem Mobil Bekerja
• Sebuah gaya yang cukup kecil
diterapkan pada pedal rem yang
akan menekan piston pada area
yang cukup kecil
• Piston akan menekan cairan rem
• Tekanan akan menyebar ke
seluruh bagian minyak rem
• Tekanan akan bekerja pada empat
piston dengan area yang lebih
besar dan melipat gandakannya
• Sebagaimana tekanan yang
terdistribusi merata, rem akan
bekerja dengan kekuatan yang
sama
Hydraulic brake
• The diagram shows a
simple brake where a pedal
will push down on the
smaller master piston
• The force pushing down
will put the liquid under
pressure
• The pressure is
transmitted through the
liquid and against the slave
piston
• The pressure causes the
slave piston to exert a
force where it is needed
Using the formula P=F/A
10N
Master
Piston
Is 5 cm2
• What is the pressure exerted
on the liquid by the slave
piston?
Answer:
Pressure = 10N / 5cm2
= 2 N/cm2
• Calculate the area of the
slave piston that will lift a
Slave
piston
100N load
Answer:
Area = force / pressure
= 100N / 2 N/cm2
More questions on hydraulics
Master
piston
=
10cm2
Slave piston
= 100cm2
1. What will the force (F1) need to be to exert a pressure
of 20 N/cm2 ?
2. Calculate the weight (F2) that can be lifted by the
slave piston.
Answers: 1. Force = 20 N/cm2 x 10cm2 = 200N
2. Force = 20 N/cm2 x 100cm3 = 2000N
Summary of the principles of
hydraulics
• Pressure is transmitted throughout a liquid
• A force may be applied anywhere to the liquid
• All hydraulic systems use a small master piston
and a large slave piston
• A small force is used to create a very big force
• The small master piston is used to apply a force
• The slave piston is always bigger than the
master piston
• The larger slave piston will multiply the
original force put on the master piston
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