Daewoo DVN-8100N Instruction Manual download pdf (Page 16)

3.

General Assembly ("G.

A. OF

THRUST

UNIT"

DWGNO.

KJ(I)0000-***-*)

Propeller

shaft(7)

and hub

body(2)

are

secured with

hub

flange bolt(27),

and

knock pin(31),

and as

propeller

shaft

is

rotated,

hub

body also

is

rotated.

Blade(3)

is

secured

to

crank ring(6) with blade bolt(25)

and

dowel bolt(26),

and as

crank ring

is

rotated,

blade

is

also rotated,

and

then pitch

is

controlled.

Crank

ring

has

groove

in

eccentricity

of

rotation axis,

and the

groove

is in

cross head(5)

pin

part

together with sliding shoe(28).

The pin has the

function

of

changing linear movement

of

crank ring into rotating movement.

OD

box(inside)(21)

is

connected with propeller shaft,

OD

box(inside)

and

propeller shaft

are

rotated,

however,

OD

box(outside)(22)

is not

rotated with

key

part

of

bracket(42) against

revolution.

OT

tube(20)

is

connected through hollow part

of

propeller shaft

to

cross

head

in hub

body.

The

movement

of

cross

head

is

transmitted directly

to

crank ring

and

blade.

There

is

arm(43)

on OT

tube,

the

movement

of OT

tube

is

feedbacked

on the

outside

of the

thruster

through

roller

chain(49)

and

feedback rod(44). Accordingly,

the

movement

of

this

feedback

rod up and

down will

be the

indication

of

blade

angle.

The

inside

of

gear

housingd)

and hub

body

are

filled with lubricating oil, O-ring(85)(86)(87)

(88)(89)(90)(100)

and

packing(99),

etc.

are

used

for

preventing

lubricating

oil

from

leaking

and

preventing

ingress

of

seawater.

The oil is

transferred

into

OD box

through rubber

hose(106)

from

A, B

port

of

hydraulic pump

unit.

Besides,

lubricating

oil is

kept with

a

little higher pressure than that

of

seawater

due to

head

pressure

always given with

piping

arrangement

of

header tank

to

piped05).

4.

General

Arrangement

("G.

A. OF

THRUST UNIT" DWGNO.

KJ(I)0000-***-*,

"THRUSTER

ARRANGEMENT"

DWGNO.

KJ(1)5000-***-*.

"FEEDBACK UNIT

ASS'Y"

DWGNO.

KJ(I)7000-***-*)

Side thruster(501)

is

installed

in

duct(502) with hex.

hd.

bolt(513).

Contact face

of

side

thruster

and

duct

is

provided with

0-ring(84)

which

prevents ingress

of

seawater.

There

is

bracket

for

feedback

box of

motor stand(504)

on

duct

on

which feedback box(701)

is

mounted. Sprocket

of

feedback

box is

connected, through roller

chain(704)(716)

and

chain

bolt(717)

with feedback rod(44).

The

actual propeller

pitch

angle

and

pitch

graduations

are

adjusted

with

chain

bolt,

and

locked

with

hex.

hd. nut of

chain

bolt.

Hand pump(506)

is

utilized

in

case

the oil in the

thruster shall

be

taken

out

into

the

outside.

In

case

the

inside

of

thruster shall

be

checked with cover(41)

and end

cover(19)

open,

in

dry-

docking

of the

vessel.

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