Yangdong Co. Y90 Series Especificações descarregar pdf (Página 32)

-1

2

3

4

5

F'ig.12 Cooling system

1.

Radiator

2. Thermostat 3. Cooling fan

4.

Water

pump

S.lnlet

water

pump

IX .

Coolin!

System

'The

cooling

system

is

a forced

circular

water

cooled

type,as

shown

in Fig.

12.~rhe

system

consists

of

a

radiator,water

pump,cooling

fan

,thermostat

and

diversion

hood,etc.

The

cooling

water,pumped

from

the

radiator

into

the

cylinder

block

water

gallery

,flows

tangentially

and

round

to

the

cylinder

liner,then

up

to

the

cylinder

head.

The

hot

\vater fronl

the

front

end

of

cylinder

head

flows

back

into

the

radiator

through

the

thermostat

and

outlet

water

pipe.When

the

temperature

of

cooling

\-vater is

below

70C~

,the

thermostat

closes,and

the

cooling

water

will

be

short-cut

for

circulation

froln

the

branch

water

pipe

on

the

front

end

of

the

cylinder

head

to

the

water

purnp inlet pipe and

the

water

pump;when

the

temperature

of

the

cooling

water

is

above

70

,-..

.

..-

80°C "the

thermostat

opens,and

the

cooling

water

flows

into

the

upper

part

of

the

radiator

through

the

thermostat

and

flows

downward

the

thermostat

and

flo\vs

downward

along

the

flat-

tube

into

thelo\ver

part

of

the

radiator,during

\\lhich the

cooling

\vater is

cooled

by

the

fan

and

cOJTIpletes

the

regular

circulation.

'fhe

cooling

fan

can

be

of

either

suction

or

blast

type

according

to its application.

rrhe

centrifugal

water

punlp

is

driven

by

the

fan belt

on

the

crankshaft

pulley.ln

case

of

severe

water

dropping

out

fronl

the

\vcep hole at the lo\ver

part

(rf

the

pump

housing

due

to

the

damage

of

\vater seal

during

operation.,it

IS

necessary

to

replace

the

V\/ater

seal hut blockitlg

the

\veep hole

at

the

time

of

leakage

IS

not perrrlitted,or the \Valer \\;ill

enter

into

the

bearings"vvhich

causes

their quick

"vearJ~eplacell1ent

ITIUst

be

considered \vhile abnornlal noise occurs during

operation.

rhe

grease

nipple

of

\Valer pUJnp

rnllst

be filJed

regularly

with

ZG~

4 caJcilun based

grease \vhich

alnounts

to

about

L'2,,·-.;

1/3

of

the

capacity

of

bearing

cavity

acc,ording to

the

rnaintenance.'The bearing l\'ill

be

overheated

with

excessive

grease.

The

single

valve type

therrnoslat

\vith

corrugated

pjPt~

is

1i

lied

with

temperaturc-

sensitive

fluid

\vhich

can

automatically control

the

valve

openin,g

and

closing.

The

tan belt Inllst be

checked

and

adjusted regularly

f<1r

its tension

according

to

the

proedures for the lnaintenance.'The slack is

10

r'

20

!nni

\vhen pressing the belt bet\veen the ian

and

the

dynamo

pul!eys.

5-10

1 2 ... 27 28 29 30 31 32 33 34 35 36 37

Comentários a estes Manuais

Sem comentários