Lubricants:-
Those substance which
is applied between two moving or sliding surface in order to reduce the
frictional resistance called lubricant.
Function
of Lubricant:-
I.
It reduce the frictional forces between
two rubbing surfaces.
II.
It reduces the cost of maintenance of
the machines and tools.
III.
It acts as a cleaning agent to wash off
the solid carbon.
IV.
It acts as a seal and prevents the entry
of moisture i.e leakage of gases under high pressure.
V.
The Lubricant prevents rusting and corrosion.
VI.
It act as a Coolant.
Lubrication:-
The process of
reducing frictional resistance between moving surface using lubricants in
between them is called Lubrication.
Friction:-
Due to mutual rubbing of
one part against another, a resistance is developed which tends to retards the
motion and produces heat energy, the resistance so developed is termed as
friction.
A number of
irregularities exist or the surfaces in the form of peaks and valleys called
asperities. Peaks and valleys get interlocked and increase the friction. If we
fill Lubricant in empty surface of valley then Lubricant make those surface
smoother and reduces the friction.
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