 |
Contaminated coolant
from machine is drained back into contaminated coolant
tank. |
|
|
A stirrer in this
tank continuously stirs coolant, preventing the
particles in suspension from settling down. This |
|
|
ensures complete
removal of contamination. |
|
|
The contaminated
coolant is pumped by feeding pump to rotating drum, from
bottom. |
|
|
As a result of high
rotational speed of drum and its conical bottom,
contaminated coolant is subjected to high |
| |
velocity and a upward
thrust. The high rotational speed generates powerful
centrifugal force, which acts on |
| |
the contaminant
particles in suspension within the oil. Contaminants
having a high density than oil is |
|
|
compacted against
inner wall of drum forming a layer of contamination in
cake form. |
|
|
The clean coolant,
collected from top of the drum, goes to clean coolant
tank. Which is pumped back to |
|
|
machine by gear pump. |
|
|
Note the time for
complete cycle is preset with timer and is depending on
the density of contamination |
|
|
generated in the
machining operation. |
|
|
After preset time,
motor is tripped off and drum speed begins to drop. |
|
|
Relief valves on
periphery of drum cover open up and coolant flows out,
it is accumulated in an annular ring around the drum.
Coolant thus collected is drained back into contaminated
coolant tank. This is called emptying cycle. |
|
|
After emptying cycle,
drum comes to a complete halt. Then scrapper inside the
drum is driven in opposite direction through a
electro-magnetic clutch-&-geared motor. Particles
sticking to inner wall of the drum are scraped off and
fall into trolley underneath. During this operation drum
is held stationary by freewheel return stop arrangement. |
|
|
Once scrapping is
finished, Centrifuge drum begins next cycle. |
|
|
| |
SAFETY
FEATURES
Following provisions have been made for safe
and smooth operation of the equipment:
|
