project report on cutch

8/14/2019 Project Report on Cutch

1/19

PROJECT REPORT ON ELECTRO MAGNETIC CLUCH

ABSTACT:

A clutch is a device used to make and !ake contact "!om the t!ansmission# $hen it en%a%es&

then 'o(e! is t!ans"e!!ed "!om en%ine to %ea! o) and (hen it disen%a%e& 'o(e! "lo( is sto'&

hence it is called "!ee !unnin% o" en%ine# The!e is an innovation done in automoile indust!*&

called elect!o ma%netic clutch& (hich is !ecentl* used * Renault Ca! Com'an*& (hich uses the

asic '!inci'le o" elect!ical ene!%* as (ell as ma%netic "o!ces#

This '!o+ect !evels the manu"actu!in% o" elect!o ma%netic clutch# In 'lace o" En%ine& sha"t is

di!ectl* attached to va!iance ,va!iale moto!- and clutch disc as (ell as '!essu!e 'late is used& in

et(een them "!iction mate!ial called .Asestos/ used to %!i' et(een the '!essu!e 'late and

clutch 'late# This '!o+ect sho(s& e)'e!imental anal*sis o" Elect!o ma%netic clutch& and at last at

(hich s'eed clutch en%a%e as (ell as disen%a%e is measu!ed and (hen clutch disen%a%e& at that

time s'eed o" "l*(heel is also measu!ed#

ORGINAL VIEW OF PROJECT:

(Figure 1-layou o! "ro#e$%

0&&&'!ial-year"ro#e$'$o) * &&&'!ialyear+e,i,'$o)
http://www.final-yearproject.com/http://www.finalyearthesis.com/http://www.final-yearproject.com/http://www.finalyearthesis.com/


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INTRO.CTION:

e!iiio o! $lu$+:The clutch is an im'o!tant 'a!t in the t!ansmission s*stem o" automoiles# It t!ansmits

'o(e! "!om the en%ine to %ea! o) at va!ious s'eeds# No shock is caused du!in% this

t!ansmission o" 'o(e!#

Pur"o,e:

The "unction o" the clutch is to tem'o!a!il* disconnect the en%ine "!om the %ea! o) unit#

$hen the %ea! has to e chan%ed "!om the "i!st to the second &it should e done a"te!

disconnectin% the en%ine "!om the %ea! o)# I" this is not done &the %ea! teeth mi%ht!eak# The clutch is thus hel'"ul (hen sta!tin%& shi"tin% %ea!s and idlin%#

Pri$i"le o! o"eraio:

The clutch (o!ks on the '!inci'les o" "!iction# $hen t(o "!iction su!"aces a!e !ou%ht in

contact (ith each othe! and '!essed the* a!e united due to the "!iction et(een them# I"

no( one is !esolved& the othe! (ill also !evolve# The "!iction et(een the t(o su!"aces

de'ends u'on the a!ea o" the su!"aces& '!essu!e a''lied u'on them and co1e""icient o"

"!iction o" the su!"ace mate!ials# The t(o su!"aces can e se'a!ated and !ou%ht intocontact (hen !e2ui!ed# The d!ivin% meme! is ke't !otatin%# $hen the d!iven meme! is

!ou%ht in contact (ith the d!ivin% meme!& it also sta!ts !otatin%# $hen the d!iven

meme! is se'a!ated "!om the d!ivin% meme! it does not !evolve# This is the '!inci'le on

(hich a clutch o'e!ates#

Re/uire)e o! a $lu$+:

1' Tor/ue ra,)i,,io: -The clutch should e ale to t!ansmit ma)imum to!2ue o"

the en%ine#

0' Graual egage)e:-The clutch should en%a%e %!aduall* to avoid sudden +e!ks#

2' 3ea i,,i"aio: -The clutch should e ale to dissi'ate la!%e amount o" heat (hich

is %ene!ated du!in% the clutch o'e!ation due to "!iction#

4' ya)i$ 5ala$ig:- The clutch should e d*namicall* alanced# This is

'a!ticula!l* !e2ui!ed in the case o" hi%h s'eed en%ine clutches#



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6' Vi5raig a)"ig: - The clutch should have suitale mechanism to dam'

vi!ations and to eliminate noise '!oduced du!in% the 'o(e! t!ansmission#

7' Si8e:-The clutch should e as small as 'ossile in si4e so that it (ill occu'*

minimum s'ace#

9' Free "eal "lay: -The clutch should have "!ee 'edal 'la* in o!de! to !educe e""ective

clam'in% load on the ca!on th!ust ea!in% and (ea! on it#

' Ea,y i o"eraio: -The clutch should e eas* to o'e!ate !e2ui!in% as little e)e!tion

as 'ossile on the 'a!t o" the d!ive!#

;' Lig+e,,:-The d!iven meme! o" the clutch should e made as li%ht as 'ossile so

that it (ill not continue to !otate "o! an* len%th o" time a"te! the clutch has een

disen%a%ed#



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5# O'e!atin% meme!s8##

The o'e!atin% meme!s consist o" a "oot 'edal& linka%e& !elease o! th!o(

out ea!in%& !elease leve!s and s'!in%s#

(Figure 4:-Peal= Bearig a ,"rig%

(Figure 6:- Layou o! &+ole $lu$+ a,,e)5ly%

:&&&'!ial-year"ro#e$'$o) * &&&'!ialyear+e,i,'$o)


6/19


ASSE OF CL.TC3:

E?PLOE VIEW OF CL.TC3 ASSE:

;&&&'!ial-year"ro#e$'$o) * &&&'!ialyear+e,i,'$o)


7/19


Ty"e, o! !ri$io )aerial:-

The "!iction mate!ials o" the clutch 'late a!e %ene!all* o" th!ee t*'es 6

0# Mill oa!d t*'e#

3# Moulded t*'e#

5# $oven t*'e#

Mill oa!d t*'e "!iction mate!ials mainl* include asestos sheets t!eated (ith di""e!ent

t*'e o" im'!e%nates#

Moulded t*'e "!iction mate!ials a!e made "!om a mat!i) o" asestos "ie! and sta!ch

o! an* othe! suitale indin% mate!ials#

$oven t*'e "acin% mate!ials a!e made * im'!e%natin% a cloth (ith ce!tain inde!s o!

* (ea!in% th!eads o" !ass o! co''e! (i!es cove!ed (ith lon% "ie! asestos and cotton#

The (oven t*'e "!iction mate!ials a!e "u!the! classi"ied into t*'es1laminated

t*'e and solid (oven t*'e#

The most common "!iction mate!ials a!e as "ollo(s 6

1' Lea+er88## Co1e""icient o" "!iction


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2' Fa5ri$888#Co1e""icient o" "!iction


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Pro"erie, o! goo !ri$io liig :-

0# Good (ea!in% '!o'e!ties#

3# Hi%h co1 e""icient o" "!iction#5# Hi%h !esistance to heat#

9# Good inde! in it#

:# Chea' and eas* to manu"actu!e#

Ty"e, o! $lu$+e,:-

7i""e!ent t*'es o" clutches a!e as "ollo(s6

0# ?!iction clutch 6

,a- @in%le 'late clutch#

,- Multi'late clutch6

,0- $et clutch#

,3- 7!* clutch#

,c- Cone clutch#

,0- E)te!nal clutch#

,3- Inte!nal clutch#

3# Cent!i"u%al clutch#

5# @emi1cent!i"u%al clutch#

9# 7ia'h!a%m clutch#

,a- Ta'e!ed "in%e! t*'e#

,- C!o(n s'!in% t*'e#

:# Positive clutch#

,a- 7o% and @'line clutch#

;# H*d!aulic clutch#

=# Elect!o1ma%netic clutch#

># acuum clutch#

B# Ove! !unnin% clutch o! "!ee1(heel unit#

B&&&'!ial-year"ro#e$'$o) * &&&'!ialyear+e,i,'$o)


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SIGLE PLATE CL.TC3:

(Figure 11-Sigle Plae Clu$+%


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(Figure 10-


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(Figure-14-Ceri!ugal Clu$+%

SE


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(Figure-17-ia"+rag) Clu$+%

OG AN SPLINE CL.TC3:

(Figure-19-og a S"lie Clu$+%

ELECTRO


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(Figure-1-Ele$ro


15/19


(Figure-0-3yrali$ Clu$+%

CO


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ne%lected& hence a ne( t*'e o" clutch used in automoile vehicles called .Renault Ca!/

called elect!oma%netic clutch#

In this clutch s*stem& (hen %ea! shi"t leve! is a''lied at that time& due to MM? clutch

(ill disen%a%e and (hen !elease leve!& clutch (ill en%a%e#

Ba,i$ o"eraio o! ele$ro)agei$ $lu$+:-

The clutch has "ou! main 'a!ts6 "ield& !oto!&a!matu!e& and hu,out'ut- ,?i%u!e133-# $hen

volta%e is a''lied the stationa!* ma%netic "ield %ene!ates the lines o" "lu) that 'ass into

the !oto!# ,The !oto! is no!mall* connected to the 'a!t that is al(a*s movin% in the

machine#- The "lu) ,ma%netic att!action- 'ulls the a!matu!e in contact (ith the !oto! ,the

a!matu!e is connected to the com'onent that !e2ui!es the accele!ation-& as the a!matu!e

and the out'ut sta!t to accele!ate# @li''in% et(een the !oto! "ace and the a!matu!e "ace

continues until the in'ut and out'ut s'eed is the same ,0


17/19


I" a 'iece o" co''e! (i!e (as (ound& a!ound the nail and then connected to a atte!*& it

(ould c!eate an elect!o ma%net# The ma%netic "ield that is %ene!ated in the (i!e& "!om the

cu!!ent& is kno(n as the .!i%ht hand thum !ule/# ,?IGURE130- The st!en%th o" the

ma%netic "ield can e chan%ed * chan%in% oth (i!e si4e and the amount o" (i!e ,tu!ns-#

EM clutches a!e simila!F the* use a co''e! (i!e coil ,sometimes aluminum- to c!eate a

ma%netic "ield#

The "ields o" EM clutch can e made to o'e!ate at almost an* 7C volta%e& and the to!2ue

'!oduced * the clutch o! !ake (ill e the same& as lon% as the co!!ect o'e!atin% volta%e

and cu!!ent is used (ith the co!!ect clutch# I" a B< clutch& a 9> clutch and a 39

clutch& all ein% 'o(e!ed (ith thei! !es'ective volta%es and cu!!ent& all (ould '!oduce

the same amount o" to!2ue# Ho(eve!& i" a B< clutch had 9> a''lied to it& this (ould

%et aout hal" o" the co!!ect to!2ue out'ut o" that clutch# This is ecause volta%ecu!!ent

is almost linea! to to!2ue in 7C elect!oma%netic clutches#

A constant 'o(e! su''l* is ideal i" accu!ate o! ma)imum to!2ue is !e2ui!ed "!om a

clutch# I" a non !e%ulated 'o(e! su''l* is used& the ma%netic "lu) (ill de%!ade& as the

!esistance o" the coil %oes u'# asicall*& the hotte! the coil %ets the lo(e! the to!2ue (ill

e& * aout an ave!a%e o" >D "o! eve!* 3


18/19


an a!matu!e# $ithin this& the!e a!e t(o "acto!s to conside!# The "i!st one is the amount o"

am'e!e tu!ns in a coil& (hich (ill dete!mine the st!en%th o" a ma%netic "ield# The second

one is ai! %a'& (hich is the s'ace et(een the a!matu!e and the !oto!# Ma%netic lines o"

"lu) diminish 2uickl* in the ai!# The "u!the! a(a* the att!active 'iece is "!om the coil& the

lon%e! it (ill take "o! that 'iece to actuall* develo' enou%h ma%netic "o!ce to e att!acted

and 'ull in to ove!come the ai! %a'# ?o! ve!* hi%h c*cle a''lications& "loatin% a!matu!es

can e used that !est li%htl* a%ainst the !oto!# In this case& the ai! %a' is 4e!oF ut& mo!e

im'o!tantl* the !es'onse time is ve!* consistent since the!e is no ai! %a' to ove!come# Ai!

%a' is an im'o!tant conside!ation es'eciall* (ith a "i)ed a!matu!e desi%n ecause as the

unit (ea!s ove! man* c*cles o" en%a%ement the a!matu!e and the !oto! (ill c!eate a la!%e!

ai! %a' (hich (ill chan%e the en%a%ement time o" the clutch# In hi%h c*cle a''lications&

(he!e !e%ist!ation is im'o!tant& even the di""e!ence o" 0&&&'!ial-year"ro#e$'$o) * &&&'!ialyear+e,i,'$o)


19/19


ETAILS OF PROJECT .S:-

0B!i l # * !i l + i

project report on cutch

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