When I
have entered in my industrial life, I have observed that approximate every
machine is dependent on hydraulic system. I was very interested to gain
knowledge about the hydraulic function and maintenance of hydraulic system.
As we know
that any type of liquid might be used for transmitting pressure energy. But
when we consider hydraulic system, there must be some special properties those
are required for desired fluid for hydraulic system.
If we
consider water for hydraulic system, it will be dangerous for our system
because water will yield lot of problems such as corrosion, boiling point,
Lower viscosity and freezing point.
Hydraulic
fluid must have lower inflammability and this characteristic is very important
for hydraulic system. Because, i have observed such hydraulic system working
areas where there were lot of fire risk factor and i want to mention some of
those areas that i have observed as high risk of fire for hydraulic system.
1. Continuous
casting machine
2. Die
casting machine
3. Forging
presses
4. Control
units for turbines for power station
5. Steel
melting unit
6. Rolling
mill
7. Pellet
units
8. Blast
furnaces
Task of Hydraulic Fluids
There are
following tasks that must be carried out by our hydraulic system
1. Pressure
transfer,
2. Lubrication
of the rotating parts of equipment,
3. Cooling,
i.e. removal of heat which is produced due to conversion of energy or because
of losses of pressure
4. Cushioning
of oscillations caused by pressure jerks,
5. Protection
against corrosion
6. Removal of
scuff
7. Signal
transmission
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