Weifang 495 - Page 99

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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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