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Under the action of the centrifugal force·,the dir.ts and impuritmies
in the oil are thrown to the inner wall of the rotor to
forma
de--
posit layer, then the .oil free of dirts and impurities injected out
through the nozzles and
flews
back to the oil sump through the in-
ner space of the filter head.
.
1
~-
o
t
(I')
Q
2
---
3
Fig. 28 !\1odel I' 4 "' l ., 85 Centrifugal
type
bypass oil filter
1 - Thrust
washer;
2 -
Rotor assembly;
3 - ·
Filter casing; 4-.· Rotor shaft;
5-Filter head; 6--Pressure regulating spring; 7-Pressure
regual~ing
valve.
The rotor assembly is housed in the filter casing to prevent
dirts from gettirlg in.
The standard working specification of the rotor is: The rotor
speed should not be low-er than 5500 rpm while the oil pressure is
of 343KPa and the oil viscosity is witllin 3 - 4 Engler degree
(which is equivalent to
the viscosity of the grade
"HC-II "
lubri-
cating ail at
80±2°C);
In' order to ensure the necessary pr"essure in the main oil pas-
sage al1d prevent the rotor from being out of normal operation be-
64
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