_
_ Lead Lead wire wire ØØ 2 ~ 32 ~ 3 mm mm _
_ Keep lead wire at right angle to direction of rotationKeep lead wire at right angle to direction of rotation _
_ Information drawn from testInformation drawn from test
ii.. SuSurrffacace e prpresessusurre e bebetwtweeeen n tytyre re & & kikilln n rorolllelerr.. ii
ii.. AdAduuststmement nt or or cutcuttiting ng of of kikiln ln rorollller er in in rerelalatition on to to kikiln ln a!a!isis.. ii
iii.i. "o"osisitition on #l#latatereralallyly$ $ of of kikiln ln rorollllerers.s. i%
i%.. "r"ropoporortitiononal al loloud ud on on inindidi%i%idudual al susupppporortsts.. %
%.. cccceennttrriicciitty y iif f aany ny iin n tthe he kkiilln n ttuubbe.e. _
_ Lead wire test also shows whether to carry out kiln alignment test wiLead wire test also shows whether to carry out kiln alignment test with le%ellingth le%elling instrument.
instrument.
PROCEDURE PROCEDURE
_
_ 'ark ( a!is A) * & + on kiln shell , -/0 apart.'ark ( a!is A) * & + on kiln shell , -/0 apart. _
_ Se1uence of a!is should be in relation to the direction of rotation of kiln %iewingSe1uence of a!is should be in relation to the direction of rotation of kiln %iewing from burning platform.
from burning platform.
_
_ At each support si! #/2$ lead wire test are At each support si! #/2$ lead wire test are made i.e ( at each made i.e ( at each roller i.e one at eachroller i.e one at each a!is.
a!is. _
_ 3he si! lead wire specimen should be marked as shown in fig. -.3he si! lead wire specimen should be marked as shown in fig. -. _
_ 3he length of lead wire specimen should be e1ual to width of kiln roller 4// mm3he length of lead wire specimen should be e1ual to width of kiln roller 4// mm
-D D FF ICL ICL IBL IBL IAL IAL L L e e f f t t h h a a n n d d r r o o l l l l e e r r R R i i g g h h t t h h a a n n d d r r o o l l l l e e r r C C B B A A C C B B A A Width of roller Width of roller IC ICRR IBR IBR IAR IAR I I n n l l e e t t o o f f k k i i l l n n O
O u u
t t l l e e t t o o f f k k i i l l n n D D i i r r e e c c t t i i o o n n
o o f f r r o o t t a a t t i i o o n n
o o f f k k i i l l n n v v i i e e w w i i n n g g f f r r o o m m o o u u t t l l e e t t & & c c l l o o c c k k w w i i s s e e
t1
ANALYSIS ANALYSIS
5igure. - shows 2 lead wire specimen taken as indicated by marking) at 5igure. - shows 2 lead wire specimen taken as indicated by marking) at support 6o.-.
support 6o.-.
'easurement of rolled lead wire is done
'easurement of rolled lead wire is done as follow7 8as follow7 8 9n graph : white sheet) mark
9n graph : white sheet) mark off width of tyre. ;i%ide it into e1ual - off width of tyre. ;i%ide it into e1ual - parts & drawparts & draw parallel lines for each a!is of rollers. 3he line in the middle is m
parallel lines for each a!is of rollers. 3he line in the middle is marked centre line of tyre.arked centre line of tyre. At e!tremes) mark with ; & 5 for outlet & inlet sides respecti%ely. 6ow place lead wire At e!tremes) mark with ; & 5 for outlet & inlet sides respecti%ely. 6ow place lead wire one by one
one by one at right angles to parallel lines with ends of rolled portion oat right angles to parallel lines with ends of rolled portion o f wires e!actlyf wires e!actly o%er the two e!treme lines. In this position) lead
o%er the two e!treme lines. In this position) lead wires are to be fi!ed & width t-) wires are to be fi!ed & width t-) t etc tot etc to be measured & these measurements are to be relocated in the table.
be measured & these measurements are to be relocated in the table.
6ow take a%erage %alue of each half of the lead wire & enter in the table i.e 6ow take a%erage %alue of each half of the lead wire & enter in the table i.e
t ; < t- 4 t 4 t ; < t- 4 t 4 t( 4 t= 4 t>t( 4 t= 4 t> > > t5 t5 < t2 4 < t2 4 t? 4 t@ t? 4 t@ 4 t 4 4 t 4 t-/t-/ > > EXAMPLE EXAMPLE Table – 1 Table – 1 Support Support No1 No1
Outlet e!" #ea$ure" Outlet e!" #ea$ure"
%&"t' %&"t' t1( t2( t3( t)( t* t1( t2( t3( t)( t* A+era, A+era, ee tD tD
I!let e!" #ea$ure" I!let e!" #ea$ure"
%&"t' %&"t' t-( t.( t/( t0( t1 t-( t.( t/( t0( t1 A+era, A+era, ee t t D&ere!4e D&ere!4e tD 5 t tD 5 t Bight A Bight A hand * hand * roller roller C C ++ ( () ) (() ) ((--) ) @@) ) @@ ((//.. ??) ) ??) ) 22) ) ==) ) == >>..22 4 4 ==..22 ( (>>) ) ((==) ) ((==) ) (() ) (( ((((..== (() ) ((--) ) ((--) ) ) ) ((//..== 4 4 ((..// 22) ) >>) ) >>) ) ==) ) == ==..@@ ==) ) (() ) (() ) ) ) -- ..22 4 4 .. A A++eerraa,,ee 2200** 22--22 663333 Left A Left A hand * hand * roller roller C C ++ >>) ) 22) ) ??) ) ??) ) @@ 22..22 ) ) ((--) ) (() ) (((() ) (((( ((--..== 8 8 ==..@@ ) ) ) ) ((//) ) ((--) ) (( ((//.. (() ) (((() ) ((==) ) ((==) ) ((>> ((((..22 8 8 ((..== //) ) --) ) --) ) ) ) (( --..== (() ) ==) ) ==) ) >>) ) 22 ==..== 8 8 ((..// A A++eerraa,,ee 22--11 2200// 5533.. Table – 2 Table – 2 S
Suuppppoorrt t I I aa77&&$$ RR&&,,''t t ''aa!!" " rroolllleerr 8 R 9
8 R 9
Let 'a!" roller Let 'a!" roller
8 L 9 8 L 9 t; t; AA * * + + ( (//.. 22..22 ( (((..== ((//.. ==..@@ --..== t5 t5 AA * * + + >>..22 ((--..== ( (//..== ((((..22 ..22 ==..== S Suumm --22??..// --22??..22 A
A%%eerraagge e wwiiddtth h oof f lleeaad d wwiirree ttB B < < ??..@@(( ttL L < < ??..(( ;ifference tL 8 tB ;ifference tL 8 tB 11 tB 4 tL : tB 4 tL : ta+ : 2.//ta+ : 2.//
CUTTIN; O <ILN ROLLERS CUTTIN; O <ILN ROLLERS
An e!ample shows that t; %alues at
An e!ample shows that t; %alues at the right handthe right hand roller are larger than the t5 %alues which means that surface pressure between tyre & the roller are larger than the t5 %alues which means that surface pressure between tyre & the right hand kiln roller is greatest at the side nearest
right hand kiln roller is greatest at the side nearest the outlet end.the outlet end. +onse1uently the roller has been c
+onse1uently the roller has been cut in the proper direction in relation to the ut in the proper direction in relation to the direction ofdirection of rotation of the kiln.
rotation of the kiln.
3he difference between t; & t5 %alues is measure of amount to which the roller has been 3he difference between t; & t5 %alues is measure of amount to which the roller has been cut.
cut.
5or right hand roller 5or right hand roller A < A < t; D t; D t5 < t5 < =.2 mm=.2 mm * < * < t; D t; D t5 < t5 < (./ mm(./ mm + < + < t; t; D tD t5 <5 < .. m mmm A%erage %alue < A 4 * 4 + < (.( mm A%erage %alue < A 4 * 4 + < (.( mm ( (
Ese a%erage %alue for the purpose of comparison Ese a%erage %alue for the purpose of comparison
If the kiln a!is is straight without any eccentricity & if the
If the kiln a!is is straight without any eccentricity & if the condition of the %ariouscondition of the %arious
bearing surfaces are good) then three difference t; D t5 one for each a!is #A) * & +$ will bearing surfaces are good) then three difference t; D t5 one for each a!is #A) * & +$ will be almost e1ual.
be almost e1ual. 3he a%erage %alue
3he a%erage %alue for the left hand roller calculated in the for the left hand roller calculated in the same manner is _ (.? mm.same manner is _ (.? mm. 6egati%e %alue shows that cutting of the rollers are towards opposite directi
6egati%e %alue shows that cutting of the rollers are towards opposite direction to that ofon to that of the right hand rollers. 3he a!is of roller should
the right hand rollers. 3he a!is of roller should be parallel after adustment and the %aluebe parallel after adustment and the %alue t5 thus being larger than t;. 3he
t5 thus being larger than t;. 3he two rollers on same support must be cut towardstwo rollers on same support must be cut towards opposite sides to make their a!is parallel.
opposite sides to make their a!is parallel.
5rom abo%e it indicates that rollers are pushing
5rom abo%e it indicates that rollers are pushing the kiln upwards towards inlet : feed end.the kiln upwards towards inlet : feed end. 5ollowing are cutting %alue) which should not be e!ceeded #for guidance only$.
5ollowing are cutting %alue) which should not be e!ceeded #for guidance only$.
=
=&&""tt' ' oo tt>>rree CCuutttt&&!!, , ++aalluue e 88aa++eerraa,,ee99 * * #### 22* * #### -- #### 33 #### . . #### 33* * #### / / #### )) #### 0 0 #### ))* * #### 1 1 #### ** ####
If the cutting angle is too great)
If the cutting angle is too great) the surface pressure will become e!cessi%e and there willthe surface pressure will become e!cessi%e and there will be o%erloading of material. 5urthermore) the purpose of cutting the rollers i.e to fi! the be o%erloading of material. 5urthermore) the purpose of cutting the rollers i.e to fi! the
kiln in a certain a!ial position through
kiln in a certain a!ial position through a uniform a!ial pressure from kiln rollers will bea uniform a!ial pressure from kiln rollers will be defeated.
defeated.
( (
LATERAL POSITION O <ILN ROLLERS LATERAL POSITION O <ILN ROLLERS
3he calculated a%erage %alues of t; & t5 3he calculated a%erage %alues of t; & t5 shall determine a%erage width tB & tL o
shall determine a%erage width tB & tL of lead wire specimen after rolling.f lead wire specimen after rolling. 3he a%erage surface pressure on right
3he a%erage surface pressure on right hand rollers corresponds to rolled a%erage widthhand rollers corresponds to rolled a%erage width tB < ? F @(
tB < ? F @( mm while tL < ?.( mm is %alue mm while tL < ?.( mm is %alue of left hand roller gi%ing difference of /.-of left hand roller gi%ing difference of /.-mm only) so a%erage pressure on
mm only) so a%erage pressure on both rollers is almost e1ual and rollers conse1uently areboth rollers is almost e1ual and rollers conse1uently are situated at an e1ual distance from
situated at an e1ual distance from centre line of kiln.centre line of kiln. If the difference e!ceeds -/G rollers should be
If the difference e!ceeds -/G rollers should be adusted laterally. 5or rollers at support ofadusted laterally. 5or rollers at support of girth gear) difference upto /G may be permitted.
girth gear) difference upto /G may be permitted.
LOAD ON INDI?IDUAL SUPPORT LOAD ON INDI?IDUAL SUPPORT
5inally the a%erage width
5inally the a%erage widtht a+t a+ is calculated for all is calculated for all the lead wire specimen which ha%e been rolled by the tyre.
the lead wire specimen which ha%e been rolled by the tyre.
t a+
t a+ is the e!pression of total pressure on the is the e!pression of total pressure on the support e!erted by the tyre and thus support e!erted by the tyre and thus gi%esgi%es our indication of load on
our indication of load on particular support. 3he %alue found for t a%particular support. 3he %alue found for t a%. is compared with t. is compared with t a%. of the roller supports & particularly compare it with past test for particular support. a%. of the roller supports & particularly compare it with past test for particular support.
INCORRECT INCLINATION O <ILN ROLLERS INCORRECT INCLINATION O <ILN ROLLERS
If the lead wire test specimen shows If the lead wire test specimen shows that cutting of the roller is normal but at
that cutting of the roller is normal but at the same time) an e!amination of the the same time) an e!amination of the bearings ofbearings of kiln rollers shows that particular roller is pushing the kiln downward in the
kiln rollers shows that particular roller is pushing the kiln downward in the direction ofdirection of outlet end of the kiln) then
outlet end of the kiln) then it is clear that bearing surface of the roller is not pit is clear that bearing surface of the roller is not p arallel witharallel with the kiln a!is & that it will be
the kiln a!is & that it will be necessary to correct the inclination of rollers by placingnecessary to correct the inclination of rollers by placing suitable shim under one of the supporting bearing.
suitable shim under one of the supporting bearing.
TROU@LE TROU@LE
i$.
i$. CUR?ED <ILN AXISCUR?ED <ILN AXIS
If there is cur%ature or ecentricity in If there is cur%ature or ecentricity in kiln shell) the pressure between the tyre &
kiln shell) the pressure between the tyre & the corresponding roller shall %ary duringthe corresponding roller shall %ary during rotation of the kiln.
rotation of the kiln.
!ample showing the effect of eccentricity in
!ample showing the effect of eccentricity in the kiln a!is. Bolling effect of lead wirethe kiln a!is. Bolling effect of lead wire specimen %aries between A) * & +
specimen %aries between A) * & +
= = AA
CC BB
In pre%ious e!ample) calculation gi%en on proceeding pages show some eccentricity of In pre%ious e!ample) calculation gi%en on proceeding pages show some eccentricity of kiln a!is indicated by rolling effect being
kiln a!is indicated by rolling effect being greatest at * a!is.greatest at * a!is. A fair indication of the direction of the
A fair indication of the direction of the eccentricity) if any in the kiln a!is is obeccentricity) if any in the kiln a!is is obtained bytained by tracing a diagram as follows7 8
tracing a diagram as follows7 8 Starting at point 9) set out Starting at point 9) set out ( lines 9A) 9* & 9+ -/0 ( lines 9A) 9* & 9+ -/0 apart) 3hen for each roller apart) 3hen for each roller calculate calculate tA < t; 4 t5 tA < t; 4 t5 t* < t; 4 t5 t* < t; 4 t5 t+ < t; 4 t5 t+ < t; 4 t5
that is width at A) * & + a!is that is width at A) * & + a!is In the diagram) then set out
In the diagram) then set out # using double siHe scale$# using double siHe scale$ 3hrough points a)b and
3hrough points a)b and c) trace a circle with its center '. c) trace a circle with its center '. 5rom 9) set out a line passing5rom 9) set out a line passing through ' intersecting circle at ;.
through ' intersecting circle at ;. A lead wire test taken on
A lead wire test taken on the kiln at ;8a!is situated 0 angle apart from a!is A the kiln at ;8a!is situated 0 angle apart from a!is A towardstowards direction * will show the greatest rolling effect to be
direction * will show the greatest rolling effect to be %erified on diagram) which is e1ual%erified on diagram) which is e1ual to distance 9; as measured on the diagram.
to distance 9; as measured on the diagram.
If the greatest a%erage width t; is di%ided by the smallest a%erage width and result is If the greatest a%erage width t; is di%ided by the smallest a%erage width and result is found more than -.() then kiln tube will ha%e to be straightened.
found more than -.() then kiln tube will ha%e to be straightened. 3he ma!imum surface pressure between a
3he ma!imum surface pressure between a kiln roller and corresponding tyre may be sokiln roller and corresponding tyre may be so great that there is great risk of pitting being caused unless the kiln is straightened.
great that there is great risk of pitting being caused unless the kiln is straightened.
LATERAL DISPLACEMENT O <ILN ROLLER LATERAL DISPLACEMENT O <ILN ROLLER ..
If the amount of rolling to If the amount of rolling to which the lead wires are subected
which the lead wires are subected is greater at one roller than that of other) is greater at one roller than that of other) the rollers arethe rollers are displaced laterally. 3he pressure originality from the girth gear may to
displaced laterally. 3he pressure originality from the girth gear may to some e!tent causesome e!tent cause non8uniform rolling. 3he rollers therefore should not be adusted laterally unless it has non8uniform rolling. 3he rollers therefore should not be adusted laterally unless it has been established through optical le%elling that adustment is re1uired.
been established through optical le%elling that adustment is re1uired. In the e!ample abo%e)
In the e!ample abo%e) the a%erage width of lead the a%erage width of lead wire specimen after rolling waswire specimen after rolling was tB < ?.@( mm #Bight hand
tB < ?.@( mm #Bight hand roller$roller$ tL < ?.( mm #Left hand
tL < ?.( mm #Left hand roller$roller$ 5rom abo%e) it appears that
5rom abo%e) it appears that the a%erage width of two specimens is wearily e1ual.the a%erage width of two specimens is wearily e1ual.
> > BB ! ! "" C C AA DD OO α α tA tA tC tC tB tB
*y di%iding the greater of these a%erage %alues by lesser one we ha%e *y di%iding the greater of these a%erage %alues by lesser one we ha%e
< ?.( < ?.(
??..@@(( < < --..////== 3his %alue is generally acceptable
3his %alue is generally acceptable for this ratio of surface pressure.for this ratio of surface pressure. Batio of surface pressure acceptable
Batio of surface pressure acceptable
ii$$.. 55oor r ggiirrtth h ggeeaar r ssuuppppoorrt t < < --../> /> F F --.. iiii$$.. 55oor r ootthheer r ssuuppppoorrtt < < --../ / F F --..-
-If the ratio e!ceeds the %alue gi%en abo%e) the support in 1uestion i.e alignment of the If the ratio e!ceeds the %alue gi%en abo%e) the support in 1uestion i.e alignment of the kiln will ha%e to be checked by le%elling test and if necessary to be corrected.
kiln will ha%e to be checked by le%elling test and if necessary to be corrected.
?ERTICAL DISPLACEMENT O TYRE ?ERTICAL DISPLACEMENT O TYRE
Jhere a%erage %alue at any one support Jhere a%erage %alue at any one support de%iates materially from that at the other supports) it may b
de%iates materially from that at the other supports) it may b e necessary to adust thee necessary to adust the distance between the rollers or in other words)
distance between the rollers or in other words) the %ertical position of the tyre. Jherethe %ertical position of the tyre. Jhere necessiated by the design or where it is desired to obtain to some e!tent a standardisation necessiated by the design or where it is desired to obtain to some e!tent a standardisation of spare parts) a wider tyre is often used there and conse1uently a%erage particular
of spare parts) a wider tyre is often used there and conse1uently a%erage particular pressure at a particular support is lower.
pressure at a particular support is lower. A lower a%erage pressure would gi%e
A lower a%erage pressure would gi%e no cause for an!iaty but no cause for an!iaty but if a%erage pressure isif a%erage pressure is abnormal or greater) an optical le%elling check should be carried out and the alignment of abnormal or greater) an optical le%elling check should be carried out and the alignment of the kiln if necessary be corrected.
the kiln if necessary be corrected.
SUMMARY SUMMARY
Lead
Lead wire wire test test is is a a rough rough method method & & this this test test will will show) show) howe%er howe%er whetherwhether an optical check is re1uired
an optical check is re1uired immedietely.immedietely.
3he difference between rolled width i.e t; D t5 will depend on the width of tyre and other 3he difference between rolled width i.e t; D t5 will depend on the width of tyre and other things and should not e!ceed > G hereof.
things and should not e!ceed > G hereof. An eccentricity present in the k
An eccentricity present in the kiln tube will gi%e %ariation in a%erage rolled widthiln tube will gi%e %ariation in a%erage rolled width tA < t
tA < t; 4 t; 4 t55 of the of the lead wilead wire orire originalginality frity from the om the same ksame kiln riln rolleroller. If t. If the a%erhe a%erageage
wiwidtdth %h %ararieies bs by y momore re ththan an (/ (/ G) G) ththen en ththe ne nataturure ae and nd e!e!tetent nt ofof eccentricity should be in%estigated by other method and correction of kiln tube should be eccentricity should be in%estigated by other method and correction of kiln tube should be taken under consideration. If the a%erage width of all rolled lead wires coming from the taken under consideration. If the a%erage width of all rolled lead wires coming from the one & same kiln roller e!ceed
one & same kiln roller e!ceed more then -/ G than the more then -/ G than the a%erage width of all lead wiresa%erage width of all lead wires coming from the outer roller on same supp
coming from the outer roller on same support #5or support at girth gear it is / G$) thanort #5or support at girth gear it is / G$) than alignment of kiln must be checked by le%elling method.
alignment of kiln must be checked by le%elling method. It is general rule that alignment of kiln must be
It is general rule that alignment of kiln must be checked by le%elling method checked by le%elling method if a%erageif a%erage surface pressure at any one support is u
surface pressure at any one support is un8usually great or low in proportion to the surfacen8usually great or low in proportion to the surface pressure at the other support.
pressure at the other support.
2 2
ANALYSIS O DIERENT CASES ANALYSIS O DIERENT CASES
5rom the gi%en figures a F e
5rom the gi%en figures a F e) of lead wire) of lead wire test passing through straight and obli1ue kiln rollers respecti%ely) the corresponding test passing through straight and obli1ue kiln rollers respecti%ely) the corresponding effect on the a!ial displacement of k
effect on the a!ial displacement of kiln and wear as the roller faces can iln and wear as the roller faces can be seen from thebe seen from the below sur%ey.
below sur%ey.
CASE 8a9
CASE 8a9 Boller is completely in parallel position & surface pressure is e1ualBoller is completely in parallel position & surface pressure is e1ual throughout the width.
throughout the width. _
_ 3endency for displacement is neutral. If all the rollers were set i3endency for displacement is neutral. If all the rollers were set in then the position) the component of the kiln load starting downward toward the position) the component of the kiln load starting downward toward the
outlet would soon o%ercome the
outlet would soon o%ercome the friction between the rollers and the tyresfriction between the rollers and the tyres and kiln would come to
and kiln would come to rest against thrust roller station and wear will berest against thrust roller station and wear will be uniform.
uniform.
CASE 8b9
CASE 8b9 Surface pressure is greatest at the center.Surface pressure is greatest at the center. _
_ 3endency for displacement at indicated direction of rotation towards the3endency for displacement at indicated direction of rotation towards the right i.e towards the upper side.
right i.e towards the upper side. Jear.
Jear. If the rolIf the roller has been cut tler has been cut to e!cessio e!cessi%e angle) the ce%e angle) the centre of the rolntre of the roller faceler face should be hollowed and pitting any occur. If the longitudinal tra%el of kiln should be hollowed and pitting any occur. If the longitudinal tra%el of kiln causes series of slides between the roller & tyre faces during e%ery
causes series of slides between the roller & tyre faces during e%ery re%olution of the kiln) facetting will occur.
re%olution of the kiln) facetting will occur. 6ote
6ote If the angle to which the roller is test) as shown in fig.+ iIf the angle to which the roller is test) as shown in fig.+ is kept a minimums kept a minimum so that center line of the roller is only
so that center line of the roller is only slightly out of parallel with centerslightly out of parallel with center line of the kiln as in fig. a)
line of the kiln as in fig. a) the surface pressure distribution will be asthe surface pressure distribution will be as fa%ourable and the roller shall push the kiln in the proper direction with fa%ourable and the roller shall push the kiln in the proper direction with suitable force and so assist in maintaining the proper displacement and suitable force and so assist in maintaining the proper displacement and operation position of the kiln.
operation position of the kiln.
CASE 849
CASE 849 Surface pressure is highest at the right hand of the rollerSurface pressure is highest at the right hand of the roller 3endency for displacement is neutral. As for as we
3endency for displacement is neutral. As for as we ar is concerned aar is concerned a hollow will be produced in the right hand half of the roller face) scaling hollow will be produced in the right hand half of the roller face) scaling occurs at the right hand edge which becomes round and pitting may occur. occurs at the right hand edge which becomes round and pitting may occur.
CASE 8"9
CASE 8"9 Surface pressure is highest at the right hand end of the roller.Surface pressure is highest at the right hand end of the roller.
3endency for displacement shall be at the direction shown in figure i.e 3endency for displacement shall be at the direction shown in figure i.e towards left i.e upwards and wear shall same as in case d.
towards left i.e upwards and wear shall same as in case d.
? ?
CASE 8e9
CASE 8e9 Surface pressure is highest at the left end of roller.Surface pressure is highest at the left end of roller. 3endency for displacement is at the direction
3endency for displacement is at the direction of rotation shown in figureof rotation shown in figure i.e towards right) wear is same as for case d
i.e towards right) wear is same as for case d but at the left hand endbut at the left hand end..
@ @ a a ## 11 22 33 44 55 66 dd ee
*y passing a lead wire be
*y passing a lead wire between the roller and tyre) it is possible from its rolled shape totween the roller and tyre) it is possible from its rolled shape to conclude how the
conclude how the a!ial position of kiln roller must be relation to the tyre.a!ial position of kiln roller must be relation to the tyre.
3he lead wire test should be e!tended so that it will pro%ide more e!act information such 3he lead wire test should be e!tended so that it will pro%ide more e!act information such as) whether kiln a!is straight) cur%ed or winding
as) whether kiln a!is straight) cur%ed or winding and if so as to where the and if so as to where the degree ofdegree of eccentricity is at a ma!imum.
eccentricity is at a ma!imum.
If kiln a!is is straight) the surface pressure between the tyres and
If kiln a!is is straight) the surface pressure between the tyres and rollers will be constantrollers will be constant or uniform. If the kiln a!is is cur%ed o
or uniform. If the kiln a!is is cur%ed or winding) on the other hand) r winding) on the other hand) so that there isso that there is eccentricity at the center plane
eccentricity at the center plane of the tyres) the surface pressure i.e width of lead of the tyres) the surface pressure i.e width of lead wire willwire will not be same during the whole of kiln rotation.
not be same during the whole of kiln rotation.
INAL CONCLUSION INAL CONCLUSION
In case of any misalignment at one
In case of any misalignment at one or more of supports)or more of supports) carry out complete realignment and or in case of any regular wear) it may become carry out complete realignment and or in case of any regular wear) it may become necessary to return or mo%e kiln roller during
necessary to return or mo%e kiln roller during operation.operation.
In general) any ir8regularity found through systematic checkup)
In general) any ir8regularity found through systematic checkup) may be rectified bymay be rectified by adustment of the kiln rollers.
adustment of the kiln rollers.
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From airlift $(&() From airlift $(&()
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