Yangdong Co. Y90 Series Spezifikationen PDF herunterladen (Seite 33)

1

,/

Fig. 12 Coolina. system

1.

Radiator

2. Thermostat. 3. Cooling fan

4.

"'ater

pump

S.

Inlet

water

pwnp

andlhn,thermostat

punlp

..

cooling

IX

.

Coolin!

System

The

cooling

system is a forced

cir,eular water

cooled

type,as

shown

in Fig.

]

2.

'[he

systern consists

of

a radiator,water

diversion hood"etc.

'fhe

cooling water,pumpcd

fr0l11

the

radiator into

the

cyJinder block water

gallery

.Jlo\vs tangentially

and

round to

the cylinder IIner"then up to the c.ylinder

head.

The

hot water from the front end

of

.

cylinder head

tlO\VS

back into the radiator

through the

thennostat

and

outlet

\vater

pipc.\\'hcn

the

tClnperature

of

cooling.

water

is

beJ()\\' 70

'{..:~

,the thermostat closes"and the

cooling

waterwiH

be

short-cut

for

circulation

from the hranch

,vater'pipe

on

the

front

end

of

the

cyJ

inder head

to

the

water

pUl11p

Inlet

pipe

and

the

water

punlp:'when

the

temperature

of

the cooling

water

is

above 70

,_

..

- 80 '(; .Jhe thennostat

opens,and

the

cooling

water flows into

the

UpPt'f

part

of

the

radiator

through

the

t.hernlostat and

tlows do\vn\vard the· thermostat

and

flows

downward

along

the

flat- tube

Into

the

lower

part

of

the radiator

..

during

\-\:hich

the

cooling

\vater is l.'ooJed

by

the

fan andcOTnpletes

the

regular

cir(·tllation

'l'ht

c()oltng

t~ln

can

be

\)1'

either suction

or

hlast

type

according

to its application.

T'he

~entrifugal

,vater pUInp

i~

driven

by lhe fan belt

on

the

crankshaft

pulleyJn

(~ase

of

severe

\-vater

dropping out

[forn

the \veep hole at the lo\ver part

of

the purnp housing due to the

danlace

of

\vatcr seal

durirl.~

opcralion

..

it

is

necessary to repJacl' the

water

seal hut blocking the

weep hole at tht: ttlne

of

leakage

is

not pennitted,or the

\vatcr

\\'ill

e~ltl~r

into the

hcarjngs~which

causes

their quick ,vear.Replacenlent

111USt

beconsidert:dwhile

abnormal

noise

occurs

during

op~ration.

'fhe

grease nipple

of

\vater pUI11p Innst be tilled regularly \\'ith

ZG-

4

calcium

based

grease

\vh~ch

HJnOunts

to abollt 1/2-"

1,3

of

the capacity

of

bearing

cavity

according to the

Inaintenanc('.r!H~

bearing wi

II

be overheated

v\'i~h

excc:,sive grease. 'I'he single valve

type

thcnnostat

\v

ith

corrllJ~ated

pipe is

ti

lied

\,\1

ith

tt~lnperature-

sensitive fluid \\'hich can

automatically control the valve

opening

and closing.

'rhe fan belt

Inusr

be checked and adjusled

n.:auulartv

ti)r

n~

tension

~H

..

:cordin}~

to the

proedures for the rnaintenance.The slack

is

if} 20

nIH.

\vhen

pres~jing

the belt betlvecn

th~

filn

and

the

dynalTIo pulleys.

5-10

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