Hydrolic System

7/23/2019 Hydrolic System

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uscol

la

open

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tho

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ground

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en

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air crafls

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air

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ngine

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l

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a

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ut

ouluolua

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f

nluku

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f

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r

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ne

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is

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t

lo"g

as

lh,

€nginc

s

aperaliaS.

tf

all

(h,

uscrr

n

lA"

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nat

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ly opuaLing

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hyclrau

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ail

I

hat

ir

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ft.

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Aau.

a

pa

IA

lo

go

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,

sa

i[

it

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to

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f

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p

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re

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cov

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pump

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i l

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o

l

users

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i

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a

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id

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hV

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a

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l

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turn

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ler

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r

e

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ian

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spe

l

f

i t

i

ob

5ucA

o,

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uscd

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seruicc.

78"

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lo*

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o

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ti,

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ted

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nt

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i

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pr

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oil

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al,,ag

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aul

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ualed

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au

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ly

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r

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li.

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the

sys

ern'

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in

lhe

cock

il

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air

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case

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ir

f

llf

|tau,.d

(

rct,acLcd

.

4,

.

78,

dourn

f;mit

s,.ri{cA

,cmortet

pa.lte(

io^

llrc

ac|ualor

wlrcn

$.

RAT

B

futty

dcplayed

( ,el,c dri]

.

A

n

indicalion

ir

rnoda

rn

(h, cochpil fo, {k ca$cof ftfrT f lA d.plo1n.a

(

5x[t,',

sia',

relracLion

aetua;o,

= Ac1uah,

)

I

-

5ys{c-

rnlerconnect

nd isol

lion

7F,

acbon

oF

in[er

canncr

and

i:,,r,lotion

yltc-l dcpe'td

th.

crcu).

.

Tf,,

interconncct

ysLc^

enoAltl

Ltt

h

move

thl.

hgdraulic

fl-tid

f,*,

0^r

hydrouli,

gttrrn

Io

onother {arding

h

$,

problcrn

accurcd.

76,

hydrauli,

ail

can

,noue

;^

a

$aad

hydranlic

rylfcrrr

h

onolhu

sJJlc,n

Aot

hat

i|s

Pu^P

fail,J,

l|;t

ir

,nad,

in

a,du

h

apenh

both

sy.rlcn

,

tilh

o b

onc

,

On

6is

Jr

no[

found

in

modern

ab

uaf

ts.



7tr,

isolotion

yslc*

ir

l;hc

on

isolalian

aluc,

(

prcvtntt

l/,,

Aydrauln

l id

h

tnler

nar'

esscntial

scrs

that lnay

hare

lro

age

so

frccpny

Ay

drau

;r

f

id

fo,

lh.-

etre{llial

erscrs

3

-

Hydrauli,

Po,p

,nala,

.

Th,

hydrauli,

malor

l suyphed

ro*

an

alle,nolr-

tcrsutt

Saurce

ammin6

f,o^

a

i,,gdrauli..

yslem.

4fru

hycLoul;,

nolo,

der,uct

a

hyc/rauli,

qmp.

7fr;s

Aydrau/;,

1;r^f

is

dsecl

t

*ppt|

{A,

Slah

anC

lop,pt

*,{rn

tAr,,

l

holr

in

ll..

rnaie

syl

Lcr,

and

/r{.s. campancnts

}

la

r

and flaps)

orc

ilolaled

fro^

{h.

essen

ia

tr

5cr5

76,

hydraul;,

pu^p

^otor

sy

cn

i

r

aperaled

a

supply

rlah and fty' *A.n (4 oft rcguireda b &ploycd. A:s

n

(osc

al

lroL gr,and

lah

and

flopt

ort

isolalcJ

ron.

e;sential

serl

lft hgdraul;,

prt^p

I

^olor

syJtern

5

laralr/ as

neor

S

possillc h tAl-wing in arde, o reduct,f | il /ars.sn casc

of

lro

kogr.

{4.

l :

{h.



@

Xr Ai' crafl

,

lherc

a(

c

t.*a

,

t J5

Va l t ,

.

28

Vo lL '

Q.lccLricily

d

f

,rn[

elu

lric

Ac

cutenL

fro*

Dc

(ur rent

f ,o^

Sotttcct

an

ait Craft

elccLric

gcneralo'J

ba

lay]

x*

6p.,

al

punpt

n

Atr

c,atls

11

0'

P

;

l-lo d

clriaen

u*P

E' D'

P

Ery..

dtiven

P't^P

t- D.

P

:

f l r rLn.

dr i tcn

pu*p

A-D'P

:

Ai ,

c l f i , tcn

' r *P

(

{

fot

ca,So

cJm'

onlS}

{

Supply

nain

pump,l

(

SrlrPlJ

main

Pu*P)

SuPpl;

rnatio

u^f

anl

il

is

nol

farnd

n

rnada^

ai'

c'oftt)



- L 4

eoMMFr.{TS

ON. AerrvlrY

I

Y o u r

o r d e r

sh o u l d

b e

( a ) ,

( c ) ,

( b )

The pressure re l ie f va lve operates

pressure

-

the

pump

has

to

Produce

consumpt

ion

.

When the

valves

are open

as

shown

has

l i t t . le

or

no

pressure

to

work

t i t t le

energy

consumption.

at the highest sYstem

this,

hence

high

energy

in

the drawing,

the

pump

against,

-

hence

very

When a

service

is selected,

the

energy consumed

must

be

somewhere

between

the two.

IFIIE

etgjiED

SYSTEM

The

open centre

system

may be

f i t ted

to some

small-

aircraf.t ,

but

the closed

system

is very common

on small

and

la rge a i rcra f t a l i ke .

F : -g .

2

be low

shows

a c losed

system

using high

and

low

pressure

fi l ters and

a constant

del ivery

pump.

Because the

pump

cannot,

'se l f - id le ' ,

the

system is a lso

f i t ted

wi th

an

ACOV

and an accumulaLor .

When a service

is se lect .ed,

one

side of the

j

ack is

connected to the

pressure

l ine,

and the other

side

to

return.

The

jack

wil l move unti l i t ,

comes to

the end

of

ius t ravel

,

or

i t is se lected Lo

stop by

placing

the

selector

valve in

neutra l

-

f lap

ci rcu i ts

for example.

ACCUMUI,ATOR

HIGH

PRESSURE

FIIJTER

o

SUCTION

LINE

RESERVOIR

,,

PRESSURE

TRANSDUCER

LOW

PRESSURE

II-ry4I{{f}IG

SWITCH

:il:.'1

]DLING

LINE

ilolf RErUR

PRESSURE

rI E

LOW

PRESSURE

FILTER

Fiq. 2

CLOSED SYSTEM

3-3-{



RESERVOIR

SUCTION

I.INE

I

RETURN

I,INE

ACTIVITY

7

l-

Mi-nute

What

woul-d

happen

if

se l e c te d

Po s i t i o n t

JACK

CENTRE

SYSTEM

the

valve

was

lef t

in

the

SELECTOR

VAIJVE

F ig .

1 OPEN

....--+

PRESSURE

REI,IEF

-.

3

ir-

Hydrolic System

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