CA1310840C - Chill roll - Google Patents
Chill rollInfo
- Publication number
- CA1310840C CA1310840C CA000601904A CA601904A CA1310840C CA 1310840 C CA1310840 C CA 1310840C CA 000601904 A CA000601904 A CA 000601904A CA 601904 A CA601904 A CA 601904A CA 1310840 C CA1310840 C CA 1310840C
- Authority
- CA
- Canada
- Prior art keywords
- roll
- coolant
- header
- chill roll
- center tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
- B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
- B41F23/0476—Cooling
- B41F23/0479—Cooling using chill rolls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
- F26B13/14—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning
- F26B13/18—Rollers, drums, cylinders; Arrangement of drives, supports, bearings, cleaning heated or cooled, e.g. from inside, the material being dried on the outside surface by conduction
- F26B13/183—Arrangements for heating, cooling, condensate removal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Continuous Casting (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
CHILL ROLL
ABSTRACT OF THE DISCLOSURE
A chill roll for cooling a web, such as in the printing industry, where a uniform temperature across the chill roll is maintained. Journals support an outer roll assembly and an inner roll assembly. The inner roll assembly is bearing mounted on the inner ends of opposing journals and the outer roll is rotated about the inner roll, which is weighted to free-wheel about the bearings to minimize rotary motion. Coolant is introduced through the journal on one end and into a center tube, where the coolant uniformly flows in an annular space between the rolls and along the length of the inner and outer roll assemblies to circumferentially traverse between the rotating and stationary outer and inner rolls. This coolant flow provides enhanced heat transfer from the outer rotating chill roll to the circulating coolant. Heated coolant collects and returns through a center tube, and exhausts through the center tube and out through the journal. Turbulence inducer bars between the inner and outer roll assemblies creates a turbulence in the coolant glow between the outer and inner rolls to further enhance heat transfer.
ABSTRACT OF THE DISCLOSURE
A chill roll for cooling a web, such as in the printing industry, where a uniform temperature across the chill roll is maintained. Journals support an outer roll assembly and an inner roll assembly. The inner roll assembly is bearing mounted on the inner ends of opposing journals and the outer roll is rotated about the inner roll, which is weighted to free-wheel about the bearings to minimize rotary motion. Coolant is introduced through the journal on one end and into a center tube, where the coolant uniformly flows in an annular space between the rolls and along the length of the inner and outer roll assemblies to circumferentially traverse between the rotating and stationary outer and inner rolls. This coolant flow provides enhanced heat transfer from the outer rotating chill roll to the circulating coolant. Heated coolant collects and returns through a center tube, and exhausts through the center tube and out through the journal. Turbulence inducer bars between the inner and outer roll assemblies creates a turbulence in the coolant glow between the outer and inner rolls to further enhance heat transfer.
Description
1 3 1~
~h~Q~
ÇB~ ~ F~ O-P~ P~C~ON~
None.
~A~KGRo ~ OF T~ E~
1. ~ a ~ ~ th~ ~Dy~ ç~ -~ The pres nt inventlon relates to a chill roll .Eor coollng oP
printing web~, and more particularly, pertains to a chill roll with an outer roll ro~ating about an ~nner roll. Coolant is distributed evenly along the interior spa~e between the inner and outer roll, and circulates circum~erentially between the rolls to effect a uniform he~t trans~er acros~ the rotating roll.
~h~Q~
ÇB~ ~ F~ O-P~ P~C~ON~
None.
~A~KGRo ~ OF T~ E~
1. ~ a ~ ~ th~ ~Dy~ ç~ -~ The pres nt inventlon relates to a chill roll .Eor coollng oP
printing web~, and more particularly, pertains to a chill roll with an outer roll ro~ating about an ~nner roll. Coolant is distributed evenly along the interior spa~e between the inner and outer roll, and circulates circum~erentially between the rolls to effect a uniform he~t trans~er acros~ the rotating roll.
2. D~scrip~io~ o~ the Prlor A~t - Conventional chill rolls used in the printing industry have provided for cooling of a web by passing the weh over a chill roll in an e~fort to reduce the temperature of the web, such as a printed web, to retard ink smearing, and to reduce web te~peratur~ before it i~ wound on a roll.
: CoolanS wa~ traditionally inkroduced into one side o~ tha roll whereupon that end o~ the roll provided ~or cooling o~ the ~eb ad~acent to th~ coolant ~ntroduc~ion area. As th~ coolant proc~ed~d ~o thQ opposit~ end o~
;the chill roll, the coolant te~peratura, as well a~ the web te~perature acro~æ the web,~lncreased so that the exhaust ~nd o~ th~ roller wax war~er than the introduction ~nd of the roller~ ~hQ net s~ect was : thak on~ edg~ portion of th~ web wa~ cooled quite well, bu~ the oppo~ing ~dge portion wa cooled ~ub~tantially less due to the temperature gradi*nt di~erential acro~s th~ chill roll. Other existlng chill roll design~ ~atured coolant passages whlch were locatad 11 3 ~
between the outer roll shell and an inner drum, and spiraled ~rom one side of the roll to the othQr side.
Still other existing chill roll structures had outer and inner drums which were rotated together, and as ~he coolant traveled across the roll, the coolant was heated by the web so that a temperature di~ferential still existed between the roll surface on leaving and entering the ends.
; Prior art chill roll~ merely pumped coolant into one end o~ the roll and simply ~orced it ~rom the : opposing end, which caused the area of the roll adjacent to the inlet to cool effectively. When the coolant picked up heat from the roll, the temperature of the area of the roll adjacent to the outlet end was much warmer than the area adjacent to the inlet. This temperature qradient across the roll would cause the web temperature to be variable in an increasing temperature differential, as well as across the roll and across the web.
Oth~r chill roll des~gn~ depended upon an excessive c~olant Plow to maintain an improved and mor~
constant t~mperature di~erential across the chill roll. Th~` greater the ~lowf th~ ~maller the temperatur~ dif~erential acro~ th~ roll. Th~ presQnt invention doos not rsquire increa~ed coolant flow to maintain a low temparatura di~erential becau e there i8 no di~erential. The ~ame temperature ~xists aaross th~ roll at any given roll tangent.
Tha present invention overcomes the disadvantages o~ the prior art davices by providing a chill roll which di~ribute~ coolant in an even and uni~orm ~3~g~
fashion along and across the entir~ length of the chill roll interior so that heat tr3nsfer is accompli~hed circum~erentially around and about an annular Rpace and passage between an outer rotating chlll roll and a ~tationary roll assembly. Heat transfQr is ~urther enhanced by turbulence inducer bars causing turbulence in the coolant flow between the stationary rQll and the rotary roll.
~ RY OF ~ E~TION
The general purpose o~ the present invention i~ to provide a chill roll for un~form cooling across the width o~ an offset web. The ch.lll roll includes a fluid flow ~ystem for delivery o~ coolant to ~n integral di~tribution fluid flow system contained in an inner stationary roll assembly which channels coolant fro~ a coolant 9upply header, and acro~s the longitudinal length of a chill roll. The cuolant ~lows circum~erentially in an annular space between a fixed and a rota~y chill roll, and then returns through a coolant return headar and return coolant exhaust.
According to one embodiment of the present invention, there is provided a ch.ill roll for reducing the temperature of a web tra~eling across the chill roll. A pin operator end journal and a drive end journal, each with internal passages, extend through end plates at opposing end~ of an outer rotary roll to support ~ bearing center tube and stationary lnner roll a~se~bly, whi~h encompa~se~ the bearing cent~r tube.
Supply coolant i~ introduc~d into the intQrior of ths stationary inner roll through the drive end ~ourn~l.
Th~ centQr tub~ is plugged at a mid-portion so a to divide th~ center tube into a coolant supply chamber anR a coolant return cha~ber. Hole~ ln these-coolant cham~er~ connect to a coolant supply header or a coolant retu~n header adjacent to the coolant supply and rQturn cha~bers. Thrust washers and coolant cooled carbon bearlngs position over a~d about the ends of the ~ournals whlch extend through the rotary outer roll. end plates. The center tube, 1naluding the w~igh~ed i.nner roll assembly components, remains stationary and free-wheels within the outer rotating roll about the carbon bearings. The stationary chill roll assembly includes circular end discs at each end of the roll which secure to opposite ends of segmented cylinclrical ~gments~
The cylindrical Begments al50 inter~ect the 6upply and return headers.
Fluid ~low is between an annul~lr spaca of the in~er ~tationary roll and the outer rotating roll.
Fluid pa~es through the end journal, the center tub~, the aoolant supply cha~ber, the coolant ~upply header, the annular space of the rolls, the coolant return header, the coolant return chamber, and an opposing end journal. Turbulence inducer bars about the cylindrical segments enhance heat transfer.
~3~8'~
orle signi~icant aspect and feature of the prssent invention is ~ ahill xoll witll an ~u~ar r~ll rclt~ting about a ~xed 3ta'cionary inne~ ~oll. The ixed innQr roll i~ weigh~l3d.
~nothe~ ~igni f icant aspent ;~nd ~eature o~ th~e pr~3~en'c inventior~ hill roll where coolant i~low is dis~lbu~d ~n a ~;ubs~anti;311y e~ual ~low al~ g the l~ngth of the cl~ill roll. 1~ ~:ubs'can~ially constant ~em~rature di~ferential ~s malnta~ n~ etw~en the end~
o~ the chill roll and alorlg l:he length of the chill roll. Heat transPer is furthe~ enhanced by turbulence ~aused by an out~3~ xoll rotating about a fixed inn~r ~oll . Heat transfe~ is ~uxther enhanced by turbulence aau~ed by turbulence induce~ bars in the coolant flow on 'c~e outer sur~ace of an inner ~oll, on ~he inner surfaGe ~ an ou~:er roll, or 1 ike~i~ po~ition~d in ~he c~olant flow.
iet~rther ~ignif ~ cant aspeat and ~eatur~ of the pr~ent ;Lnvention ~ a ch~ oll where ~ur~ce ~ension b~cwsen ~ rota~ing ~oll, a iEix~dl ro3.1 and th~
int~rpo~d cool~n'c moves ~oolant by inertial ~eed bxtw~æ~n the roll~ in t~9 di2~ecl;ion vf rotation.
-~ 3 ~
Having thus described the embodi~ents of the present invention, it is a principal object hereof to provide a chill roll for he cooling of an offset web or a like wQb ~ember.
One ob~ct of ~he present ~nvention i~ ~ chill roll which provide~ for even temperature cooling acros~
the chill roll. The temperature i~ tr~nsferred to the passing web.
Anoth~r ob~ect o~ the present invention i8 a chill roll who~e temperature differential is equal acro6s th~
roll indepen~ent of the amount of coolant flow. This provides uni~orm cooling.
A further object of the present invention is utilizing turbulence 10w of the fluid between the outer chill roll and the inner roll to further enhance heat transfer.
., , ~ 3 ~
~ CRIP~ION OF~ ~R~ D~A~IN~
Other objects o~ the present invention and many of the attendant advantages o~ the pre~ent invention will be readily appreciated as the same becomes better un-derstood by reference to the followinq detailed de-scription when consid2red in connection with the acco~-panying drawings, in which like re~erenc0 numerals des-ignate li~e parts throughout the figure~ ther~of and wherein:
~I~. 1 illustrates an exploded perspective view of the major companents of a chill roll;
FIa. 2 illu~trates a partial cros~-sectional view through the vertical axis of the chill roll;
FIG. 3 illustrate~ a multi-cross-sectional end view of the chill roll including half cross-sectional views through the mid-portions of the coolant supply chamber and coolant return chamber;
~ I~. 4 illustrates a cross-seetional view through the vertical axi~ of the chill roll illustrating the ~O center tub~ in plan view engaged ovar and about th~
operator end ~ournal;
~ IO, 5 illustrate~ th~ chill roll supported b~tween b~arin~ a~e~blies;
illustr~t~s a cro~s-~ect~o~al top viaw Or the chill roll throu~h the hor~zontal plane and an axls o~ the chill roll:
7 illustrates the cross section o~ ~IG. 3 and the flow of coolant therein; and, ~ 8 illustrat2~ an alternative embodiment in cro~s section through th~ vertical axi~ o~ the chill ~oll. 8 ~ 3 ~ a DE~CRIPTION OF THB PR~FERRED ~BQDIMENT8 ~ . 1 illustrates an exploded perspective view of the illustrated major compon~nts of a ch.ill roll 10 for use in cooling a web, such as used in pr:inting or other related field~. The chill roll 10 includeæ a cylindrical outer roll 12 which rotates coaxially about a cylindrical like inner roll assembly 14. The inner roll assembly 14 position~ within the interior 16 o~
the cylindrical out~r roll 12, and includes cylindrical ~egment~ 18a and 18b, each secured to the periphery of a channel like coolant supply header 20 and a channel like coolant return header 22. The coolant supply header 20 and the coolant return header 22 secure about a ce~ter tube 24. The center tube ~4, the coolant supply header 20 and the coolant return header 22 ;include a plurality of orifices for the channeling or directing o~ coolant flow~ about the interior and exteriors o~ the center tube 24, the coolant supply header 20, and the coolant return header 22. A
plurality o~ upper strengthening gu~ets 30a-30n and a plurality o~ low~r atren~thening gus~ets 32a-32n po~ition across th~ coolant ~upply header 20 and the coolant return header 22 in the inner roll assembly 14.
End df~cs 26 ~nd 28 secur~ in a water tight ~ann~r over 2s opposing ond~ o~ cylindrical eegm~nt~ 18a-18b, coolant ~upply h~d~r 20, oolant return header 2~ and the :center tub~ a4, e~ch of the precedi~g elements belng a ~ember o~ th~ lnner roll as~e~bly 14~ A described later in detail, a w~ight 34, rese~bling a cylinder segment, po~ition~ in the bottom of the inner roll assembly 14 along the length o~ the cylindrical sa~nent 18b to counter a~y rotational t~ndencies of the inner roll assembly 14. A circular end cap 36, including a drive end ~ournal 38, ~ffixes in one end of the cylindrical outer roll 12. A removahle ~nd cap 40, which includes an operator end journal 42, ~ecure~ in the opposing ~nd o the cylindrical outer roll 12. The drive end ~ournal 38 and the operator end ~ournal 42 extend through end caps 36 and 40, respectively, and into opposing ends o~ centrally aligned center tube 24 with wat~r cooled carbon bearings 54 and ~o interposed to support the inner roll assembly 14. A cylindrical coolant supply orifice 44, concentric within the drive end journal 38, provides a path for supply coolant to enter the inner roll assembly 14 through the center tube 24. Turbulence inducer bars 48a-48n, each being a part o~ the inner roll assembly 14, position longitudinally along the outer surfaces of the cylindrical segment~ 18a-18b. A coolant drain plug ~o locates in th~ r~movable end cap ~0 to facilitate chill roll 10 drainag~.
~
~ 3 ~
FI~. X illustrates a partial cross-sectional view of the support of the inner roll assembly 14 by drive end journal 38 and operator end journal 42 taken through th~ v2rtical axis of the chill roll 10 of FXG.
1, where all nu~erals correspond to tho~e elements previously described. Operator end journal 42 secure~
in a hole 52 and extends beyond the inner wall of the removable end cap 40. A shouldered watlsr cooled carbon bearing 54 interposes between the annular surface 56 10 and the inner annular surfac~ 58 of the c:enter tube 24.
A thrust washer 60 includes anti-rotational pins 62 and 64 engaged within holes 66 and 68 in the removab:Le end cap 40, and intercedes ~etween the water cooled carbon bearing 54 and the inner surface 40a of the removable end cap 40. Removable end cap 40 includes an annular groove 70 and an O-ring seal 72 providing a water tight seal bet~en the removable end cap 40 and the outer roll 12. Thr~ads 74, in the removable end cap 40, engage thr~ad~ 76 on the interior o the outer roll 12.
T~ driv~ ~nd ~ournal 38 grictionally Qngage~ within hole 78 a~d ~xtQnds beyond the inner wall of the end c~p 36. ~ shoulderod water cooled carbon bsaring 80 interpo~a~ bstw~n the annular surfac~ 82 o~ the drive end iour~al 38 and th~ inn~r annular ~urfac~ R4 0~ the cent~r tub~ 24. A thrust wash~r 86 includes anti-rotation~l pins 88 and 90 engaged within holas 92 and 94 in th~ r~movablQ end cap 36. A wave washer 9~ and the thrust wa~har 86 both interposo between the w~ter cooled carbon bearing 80 and the inner surface 36a of the end aap 36. The center tuba 24, being mounted over and being ~upported by Arive enA journal 38, operator ~31~0 end journal 42 and water cooled carbon bearings 80 and 54, along with its as~ociated components i~cluding weight 34, remains stationary as t~ oUteE roll 12 is driven in rotary motion about the lnner roll assembly 14 by rotational motlon of the drive end ~ournal 38.
An expansion plug 100 installs in the mld-portion of the center tube 24, and divides the center tube into a coolant supply cha~ber 24a and a coolant return cha~ber 24b. The coolant supply chamber 24a includes a plurality of hole~ 102a-102n which port to the coolant ~upply header 20, whi~h in this illustration aligns directly behind the holes 102a-102n. This mechanical relationship is illustrated in FIGo 3~ Coolant return chamber 24b also includes a plurali.ty of holes 104a-104n oriented 180 ~rom holes 102a-102n, the location of which are illustrated in FIGS. 3 and 4. Hole~ 104a-104n port ~he coolant return header 22. The plurality of holes 102a-102n and 104a-104n substantially align $n : a straight path along vertical tangent~ of the center tub~ ~4, ~nd al80 include additional hole~ included in tha hole~ 102a-102n and 104a-104n radlally displaced ~ro~ the ~ertical tan~ential orientat~on. An annular coolant passage i~ ~ormod betwe~n th~ outer roll 12 and tha innsr roll a~se~bly 14.
~ 310?~Ll~
FI~. ~ illustrates a multi-view cross~sectional end view o~ the chill roll 10 includinq a cross section through the mid-portions o~ the coolant 6upply and return chambers 24a and 24b, and including the inner roll a~se~bly 14 aligned in the outer roll 12 ~ vl~wed frsm the removable end cap 40. All nuDleral~ corre~pond to those elements previously described. The coolant supply header 20 include~ ~ right ~ngle me~ber 110 and a planar ~mber 112, both of whlch secure together at a joint 113 and to ridge areas 114 and 116 on the center tube 24. The coolant return header 22 also includes a right angle member 118 and a planar member 120, both of which secure together at a joint 115 and to ridge areas 114 an~ 116 on the center tube 24. The upper cylindrical segment 18a s~cure~ ln an appropriate manner to the coolant supply h~ader and return haader 20 and 22 at ~oints 113 and 115. Additionally, ~oints 122 and 124 ~oin the lower cylindrical ~egment l~b to : the right angle members 110 and 118 o~ the coolant ~upply and r~turn haader~ 2G and 22~ A plurality o~
holQs 126a-126n }ocate along th~ length o~ the right angle member 110 o~ t~e coolant ~upply header 20.
Another plurality of holes 128~128n locate along the length o~ the right angl~ me~bQr 118 o~ th~ coolant return h~d~r 22.
,~ ' ~3~4~
~ illustrates a cross-sectional view through th~ vertical axi~ 3P the chill roll 10 illuatrating the center tube 24 in plan view in the left portlon oP the illustration, and engaged over and abouk the operator end journal 42. All nu~erals correspond to those elements previously descri~ed. A portion of the plurality of holes 104a-104n located on one ~ide of the CQnter tube 24 are illustrated~ The coolant supply chamber 24a lies directly behind the plurality oP holes 104a-104n in the center tube 24~ Fluid travels to the coolant return chamber 24b through the plurality of holes 104a-104n from the coolant return header 22, illustrated in FIG. 5, which abuts perpendicularly and outwardly Prom the center tube 24 towards the viewler of the illustration.
''.
~ 14 1 3 ~
FI~. S illustrates the chill roll 10 ~upported ~or rotation ~etween bearings 140 and 142 which are ~ecured to slde frames 144 and 146. A pulley 148 ~ecures over t~e driv~ ~nd journal 38 with a ~ey 150 which engages in a keyway in the pulley 148 and a i~lot 152. The pulley 148 is rotated by an external motor imparting rotary motion to the outer roll 12 of the chill roll 10 while the weigh$ed inner xoll ~a~bly 14 remains st~kionary. As the outer roll 12 rotates about the inner roll assembly 14, coolant is introduced and returned from the interior of the chill roll 10 throuqh water tight rotary joints placed over and about the external portion oE coolant supply and outlet orifices 44 and 46. Coolant flow is now described in detail in FIGS. 6 and 7.
~ 3 ~
~O~B.OF OPB ~ION
FIGS. 6 a~a 7 best illustrate the mode of operation of the chill roll 10 where all numerals correspond to tho~a elements previously described.
FIG. 6 illustrates a cross-sectional top view through the horizontal plane and axis of the chill roll 10 illustrating longitudinal and 12lteral flow o~
coolant through the chill roll 10.
FIG. 7 illustrates a cross-sectiorlal view of FIG.
: CoolanS wa~ traditionally inkroduced into one side o~ tha roll whereupon that end o~ the roll provided ~or cooling o~ the ~eb ad~acent to th~ coolant ~ntroduc~ion area. As th~ coolant proc~ed~d ~o thQ opposit~ end o~
;the chill roll, the coolant te~peratura, as well a~ the web te~perature acro~æ the web,~lncreased so that the exhaust ~nd o~ th~ roller wax war~er than the introduction ~nd of the roller~ ~hQ net s~ect was : thak on~ edg~ portion of th~ web wa~ cooled quite well, bu~ the oppo~ing ~dge portion wa cooled ~ub~tantially less due to the temperature gradi*nt di~erential acro~s th~ chill roll. Other existlng chill roll design~ ~atured coolant passages whlch were locatad 11 3 ~
between the outer roll shell and an inner drum, and spiraled ~rom one side of the roll to the othQr side.
Still other existing chill roll structures had outer and inner drums which were rotated together, and as ~he coolant traveled across the roll, the coolant was heated by the web so that a temperature di~ferential still existed between the roll surface on leaving and entering the ends.
; Prior art chill roll~ merely pumped coolant into one end o~ the roll and simply ~orced it ~rom the : opposing end, which caused the area of the roll adjacent to the inlet to cool effectively. When the coolant picked up heat from the roll, the temperature of the area of the roll adjacent to the outlet end was much warmer than the area adjacent to the inlet. This temperature qradient across the roll would cause the web temperature to be variable in an increasing temperature differential, as well as across the roll and across the web.
Oth~r chill roll des~gn~ depended upon an excessive c~olant Plow to maintain an improved and mor~
constant t~mperature di~erential across the chill roll. Th~` greater the ~lowf th~ ~maller the temperatur~ dif~erential acro~ th~ roll. Th~ presQnt invention doos not rsquire increa~ed coolant flow to maintain a low temparatura di~erential becau e there i8 no di~erential. The ~ame temperature ~xists aaross th~ roll at any given roll tangent.
Tha present invention overcomes the disadvantages o~ the prior art davices by providing a chill roll which di~ribute~ coolant in an even and uni~orm ~3~g~
fashion along and across the entir~ length of the chill roll interior so that heat tr3nsfer is accompli~hed circum~erentially around and about an annular Rpace and passage between an outer rotating chlll roll and a ~tationary roll assembly. Heat transfQr is ~urther enhanced by turbulence inducer bars causing turbulence in the coolant flow between the stationary rQll and the rotary roll.
~ RY OF ~ E~TION
The general purpose o~ the present invention i~ to provide a chill roll for un~form cooling across the width o~ an offset web. The ch.lll roll includes a fluid flow ~ystem for delivery o~ coolant to ~n integral di~tribution fluid flow system contained in an inner stationary roll assembly which channels coolant fro~ a coolant 9upply header, and acro~s the longitudinal length of a chill roll. The cuolant ~lows circum~erentially in an annular space between a fixed and a rota~y chill roll, and then returns through a coolant return headar and return coolant exhaust.
According to one embodiment of the present invention, there is provided a ch.ill roll for reducing the temperature of a web tra~eling across the chill roll. A pin operator end journal and a drive end journal, each with internal passages, extend through end plates at opposing end~ of an outer rotary roll to support ~ bearing center tube and stationary lnner roll a~se~bly, whi~h encompa~se~ the bearing cent~r tube.
Supply coolant i~ introduc~d into the intQrior of ths stationary inner roll through the drive end ~ourn~l.
Th~ centQr tub~ is plugged at a mid-portion so a to divide th~ center tube into a coolant supply chamber anR a coolant return cha~ber. Hole~ ln these-coolant cham~er~ connect to a coolant supply header or a coolant retu~n header adjacent to the coolant supply and rQturn cha~bers. Thrust washers and coolant cooled carbon bearlngs position over a~d about the ends of the ~ournals whlch extend through the rotary outer roll. end plates. The center tube, 1naluding the w~igh~ed i.nner roll assembly components, remains stationary and free-wheels within the outer rotating roll about the carbon bearings. The stationary chill roll assembly includes circular end discs at each end of the roll which secure to opposite ends of segmented cylinclrical ~gments~
The cylindrical Begments al50 inter~ect the 6upply and return headers.
Fluid ~low is between an annul~lr spaca of the in~er ~tationary roll and the outer rotating roll.
Fluid pa~es through the end journal, the center tub~, the aoolant supply cha~ber, the coolant ~upply header, the annular space of the rolls, the coolant return header, the coolant return chamber, and an opposing end journal. Turbulence inducer bars about the cylindrical segments enhance heat transfer.
~3~8'~
orle signi~icant aspect and feature of the prssent invention is ~ ahill xoll witll an ~u~ar r~ll rclt~ting about a ~xed 3ta'cionary inne~ ~oll. The ixed innQr roll i~ weigh~l3d.
~nothe~ ~igni f icant aspent ;~nd ~eature o~ th~e pr~3~en'c inventior~ hill roll where coolant i~low is dis~lbu~d ~n a ~;ubs~anti;311y e~ual ~low al~ g the l~ngth of the cl~ill roll. 1~ ~:ubs'can~ially constant ~em~rature di~ferential ~s malnta~ n~ etw~en the end~
o~ the chill roll and alorlg l:he length of the chill roll. Heat transPer is furthe~ enhanced by turbulence ~aused by an out~3~ xoll rotating about a fixed inn~r ~oll . Heat transfe~ is ~uxther enhanced by turbulence aau~ed by turbulence induce~ bars in the coolant flow on 'c~e outer sur~ace of an inner ~oll, on ~he inner surfaGe ~ an ou~:er roll, or 1 ike~i~ po~ition~d in ~he c~olant flow.
iet~rther ~ignif ~ cant aspeat and ~eatur~ of the pr~ent ;Lnvention ~ a ch~ oll where ~ur~ce ~ension b~cwsen ~ rota~ing ~oll, a iEix~dl ro3.1 and th~
int~rpo~d cool~n'c moves ~oolant by inertial ~eed bxtw~æ~n the roll~ in t~9 di2~ecl;ion vf rotation.
-~ 3 ~
Having thus described the embodi~ents of the present invention, it is a principal object hereof to provide a chill roll for he cooling of an offset web or a like wQb ~ember.
One ob~ct of ~he present ~nvention i~ ~ chill roll which provide~ for even temperature cooling acros~
the chill roll. The temperature i~ tr~nsferred to the passing web.
Anoth~r ob~ect o~ the present invention i8 a chill roll who~e temperature differential is equal acro6s th~
roll indepen~ent of the amount of coolant flow. This provides uni~orm cooling.
A further object of the present invention is utilizing turbulence 10w of the fluid between the outer chill roll and the inner roll to further enhance heat transfer.
., , ~ 3 ~
~ CRIP~ION OF~ ~R~ D~A~IN~
Other objects o~ the present invention and many of the attendant advantages o~ the pre~ent invention will be readily appreciated as the same becomes better un-derstood by reference to the followinq detailed de-scription when consid2red in connection with the acco~-panying drawings, in which like re~erenc0 numerals des-ignate li~e parts throughout the figure~ ther~of and wherein:
~I~. 1 illustrates an exploded perspective view of the major companents of a chill roll;
FIa. 2 illu~trates a partial cros~-sectional view through the vertical axis of the chill roll;
FIG. 3 illustrate~ a multi-cross-sectional end view of the chill roll including half cross-sectional views through the mid-portions of the coolant supply chamber and coolant return chamber;
~ I~. 4 illustrates a cross-seetional view through the vertical axi~ of the chill roll illustrating the ~O center tub~ in plan view engaged ovar and about th~
operator end ~ournal;
~ IO, 5 illustrate~ th~ chill roll supported b~tween b~arin~ a~e~blies;
illustr~t~s a cro~s-~ect~o~al top viaw Or the chill roll throu~h the hor~zontal plane and an axls o~ the chill roll:
7 illustrates the cross section o~ ~IG. 3 and the flow of coolant therein; and, ~ 8 illustrat2~ an alternative embodiment in cro~s section through th~ vertical axi~ o~ the chill ~oll. 8 ~ 3 ~ a DE~CRIPTION OF THB PR~FERRED ~BQDIMENT8 ~ . 1 illustrates an exploded perspective view of the illustrated major compon~nts of a ch.ill roll 10 for use in cooling a web, such as used in pr:inting or other related field~. The chill roll 10 includeæ a cylindrical outer roll 12 which rotates coaxially about a cylindrical like inner roll assembly 14. The inner roll assembly 14 position~ within the interior 16 o~
the cylindrical out~r roll 12, and includes cylindrical ~egment~ 18a and 18b, each secured to the periphery of a channel like coolant supply header 20 and a channel like coolant return header 22. The coolant supply header 20 and the coolant return header 22 secure about a ce~ter tube 24. The center tube ~4, the coolant supply header 20 and the coolant return header 22 ;include a plurality of orifices for the channeling or directing o~ coolant flow~ about the interior and exteriors o~ the center tube 24, the coolant supply header 20, and the coolant return header 22. A
plurality o~ upper strengthening gu~ets 30a-30n and a plurality o~ low~r atren~thening gus~ets 32a-32n po~ition across th~ coolant ~upply header 20 and the coolant return header 22 in the inner roll assembly 14.
End df~cs 26 ~nd 28 secur~ in a water tight ~ann~r over 2s opposing ond~ o~ cylindrical eegm~nt~ 18a-18b, coolant ~upply h~d~r 20, oolant return header 2~ and the :center tub~ a4, e~ch of the precedi~g elements belng a ~ember o~ th~ lnner roll as~e~bly 14~ A described later in detail, a w~ight 34, rese~bling a cylinder segment, po~ition~ in the bottom of the inner roll assembly 14 along the length o~ the cylindrical sa~nent 18b to counter a~y rotational t~ndencies of the inner roll assembly 14. A circular end cap 36, including a drive end ~ournal 38, ~ffixes in one end of the cylindrical outer roll 12. A removahle ~nd cap 40, which includes an operator end journal 42, ~ecure~ in the opposing ~nd o the cylindrical outer roll 12. The drive end ~ournal 38 and the operator end ~ournal 42 extend through end caps 36 and 40, respectively, and into opposing ends o~ centrally aligned center tube 24 with wat~r cooled carbon bearings 54 and ~o interposed to support the inner roll assembly 14. A cylindrical coolant supply orifice 44, concentric within the drive end journal 38, provides a path for supply coolant to enter the inner roll assembly 14 through the center tube 24. Turbulence inducer bars 48a-48n, each being a part o~ the inner roll assembly 14, position longitudinally along the outer surfaces of the cylindrical segment~ 18a-18b. A coolant drain plug ~o locates in th~ r~movable end cap ~0 to facilitate chill roll 10 drainag~.
~
~ 3 ~
FI~. X illustrates a partial cross-sectional view of the support of the inner roll assembly 14 by drive end journal 38 and operator end journal 42 taken through th~ v2rtical axis of the chill roll 10 of FXG.
1, where all nu~erals correspond to tho~e elements previously described. Operator end journal 42 secure~
in a hole 52 and extends beyond the inner wall of the removable end cap 40. A shouldered watlsr cooled carbon bearing 54 interposes between the annular surface 56 10 and the inner annular surfac~ 58 of the c:enter tube 24.
A thrust washer 60 includes anti-rotational pins 62 and 64 engaged within holes 66 and 68 in the removab:Le end cap 40, and intercedes ~etween the water cooled carbon bearing 54 and the inner surface 40a of the removable end cap 40. Removable end cap 40 includes an annular groove 70 and an O-ring seal 72 providing a water tight seal bet~en the removable end cap 40 and the outer roll 12. Thr~ads 74, in the removable end cap 40, engage thr~ad~ 76 on the interior o the outer roll 12.
T~ driv~ ~nd ~ournal 38 grictionally Qngage~ within hole 78 a~d ~xtQnds beyond the inner wall of the end c~p 36. ~ shoulderod water cooled carbon bsaring 80 interpo~a~ bstw~n the annular surfac~ 82 o~ the drive end iour~al 38 and th~ inn~r annular ~urfac~ R4 0~ the cent~r tub~ 24. A thrust wash~r 86 includes anti-rotation~l pins 88 and 90 engaged within holas 92 and 94 in th~ r~movablQ end cap 36. A wave washer 9~ and the thrust wa~har 86 both interposo between the w~ter cooled carbon bearing 80 and the inner surface 36a of the end aap 36. The center tuba 24, being mounted over and being ~upported by Arive enA journal 38, operator ~31~0 end journal 42 and water cooled carbon bearings 80 and 54, along with its as~ociated components i~cluding weight 34, remains stationary as t~ oUteE roll 12 is driven in rotary motion about the lnner roll assembly 14 by rotational motlon of the drive end ~ournal 38.
An expansion plug 100 installs in the mld-portion of the center tube 24, and divides the center tube into a coolant supply cha~ber 24a and a coolant return cha~ber 24b. The coolant supply chamber 24a includes a plurality of hole~ 102a-102n which port to the coolant ~upply header 20, whi~h in this illustration aligns directly behind the holes 102a-102n. This mechanical relationship is illustrated in FIGo 3~ Coolant return chamber 24b also includes a plurali.ty of holes 104a-104n oriented 180 ~rom holes 102a-102n, the location of which are illustrated in FIGS. 3 and 4. Hole~ 104a-104n port ~he coolant return header 22. The plurality of holes 102a-102n and 104a-104n substantially align $n : a straight path along vertical tangent~ of the center tub~ ~4, ~nd al80 include additional hole~ included in tha hole~ 102a-102n and 104a-104n radlally displaced ~ro~ the ~ertical tan~ential orientat~on. An annular coolant passage i~ ~ormod betwe~n th~ outer roll 12 and tha innsr roll a~se~bly 14.
~ 310?~Ll~
FI~. ~ illustrates a multi-view cross~sectional end view o~ the chill roll 10 includinq a cross section through the mid-portions o~ the coolant 6upply and return chambers 24a and 24b, and including the inner roll a~se~bly 14 aligned in the outer roll 12 ~ vl~wed frsm the removable end cap 40. All nuDleral~ corre~pond to those elements previously described. The coolant supply header 20 include~ ~ right ~ngle me~ber 110 and a planar ~mber 112, both of whlch secure together at a joint 113 and to ridge areas 114 and 116 on the center tube 24. The coolant return header 22 also includes a right angle member 118 and a planar member 120, both of which secure together at a joint 115 and to ridge areas 114 an~ 116 on the center tube 24. The upper cylindrical segment 18a s~cure~ ln an appropriate manner to the coolant supply h~ader and return haader 20 and 22 at ~oints 113 and 115. Additionally, ~oints 122 and 124 ~oin the lower cylindrical ~egment l~b to : the right angle members 110 and 118 o~ the coolant ~upply and r~turn haader~ 2G and 22~ A plurality o~
holQs 126a-126n }ocate along th~ length o~ the right angle member 110 o~ t~e coolant ~upply header 20.
Another plurality of holes 128~128n locate along the length o~ the right angl~ me~bQr 118 o~ th~ coolant return h~d~r 22.
,~ ' ~3~4~
~ illustrates a cross-sectional view through th~ vertical axi~ 3P the chill roll 10 illuatrating the center tube 24 in plan view in the left portlon oP the illustration, and engaged over and abouk the operator end journal 42. All nu~erals correspond to those elements previously descri~ed. A portion of the plurality of holes 104a-104n located on one ~ide of the CQnter tube 24 are illustrated~ The coolant supply chamber 24a lies directly behind the plurality oP holes 104a-104n in the center tube 24~ Fluid travels to the coolant return chamber 24b through the plurality of holes 104a-104n from the coolant return header 22, illustrated in FIG. 5, which abuts perpendicularly and outwardly Prom the center tube 24 towards the viewler of the illustration.
''.
~ 14 1 3 ~
FI~. S illustrates the chill roll 10 ~upported ~or rotation ~etween bearings 140 and 142 which are ~ecured to slde frames 144 and 146. A pulley 148 ~ecures over t~e driv~ ~nd journal 38 with a ~ey 150 which engages in a keyway in the pulley 148 and a i~lot 152. The pulley 148 is rotated by an external motor imparting rotary motion to the outer roll 12 of the chill roll 10 while the weigh$ed inner xoll ~a~bly 14 remains st~kionary. As the outer roll 12 rotates about the inner roll assembly 14, coolant is introduced and returned from the interior of the chill roll 10 throuqh water tight rotary joints placed over and about the external portion oE coolant supply and outlet orifices 44 and 46. Coolant flow is now described in detail in FIGS. 6 and 7.
~ 3 ~
~O~B.OF OPB ~ION
FIGS. 6 a~a 7 best illustrate the mode of operation of the chill roll 10 where all numerals correspond to tho~a elements previously described.
FIG. 6 illustrates a cross-sectional top view through the horizontal plane and axis of the chill roll 10 illustrating longitudinal and 12lteral flow o~
coolant through the chill roll 10.
FIG. 7 illustrates a cross-sectiorlal view of FIG.
3 illustrating circular flow o~ coolant 160 between the ~nnular coolant pas~aga 106, between the outer roll 12 and the inn~r roll assembly 14. It is noted that t:he outer roll 12 is in constant rotary motion on a com~on axis about the stationary inner roll assembly 14 as coolant ~lows through the chill roll 10. Coolant 160 is supplied to the coolant supply cham~er 24a through the coolant supply orifice 44. Coolant proceeds and fl~ws horizontally and longitudinally along the length of the coolant supply chamber 24a, and then flows ;20 horizontally and laterally through the plurality of hole~ 102a-102n, horizontally and laterally into thQ
;coolant ~upply header 20 where the uni~or~ temperatur2 ::~coolant, not yQt expos~d to out-roll heat gradiant, i~
uni~ormly directed and distributad hori~ontally and laterally through th~ plurality of holes 126a-12~n and into th~ annul~r coolant passa~e 106.
Wlth re~rence to FIG~ 7, movement o~ uniform tamperatur~ coolant 160 ~rom hole~ 126a-126n locatsd ~;along t~:length of the coolant supply header 20, and rvtary motion o~ the outer roll 12 by means o~ 1nertial feed cause3 coolant 160 to circumPerentially traverae along th~ ~;yl~ ndr~ l segment 18a of th~ inner roll assem~ly 14, and with~ the annular coolant passag~ 106 to the plural~y o~ hoï~; 12~a-12~n in the coolant return ll~ader 2~. ~h~ coolall'c 160, with a 5 ~ubs~2ln~ially increased te~nperature, is collec ed by tha c:oola~ r~turn headar ~2 through hlols~ 1213a~128n.
The waxm,lsd coolant 160 is col lected ancl p~sse~ thxough 1~51~ 04a 1~4n into the ~oolant return chamber 24b and ~v~rb~ard through the coc~lant outlet ori~ic~ 4~.
lV Coolant 160 i~ distributed uniPormly along the entire length of the inner roll assembly 14 by ~c~e hole~ 126~-126n ln the coolant supply ~eader ~o, and causes heat-trans~er fxom the outer roll 12 ~c~ the coolarlt 160 ~o be ~nlf~rm across the ~nnula~ coolant p~ssage 106.
1~ portion o~ th~ oolant p~oc~eeds full ci~le be~ond ~he ~oolant rseturn h~ader ~2, pas~ and by the c~lind~ical ~egment l~b o~ th~ inner roll assem3: 1y 14, and a~so continues l;o :~move heat ~Erom ~hl3 outer roll 12 in a un~ rm ~ashion. T~ tempe~a~ure acro~8 the xo~atlng 20 ouker roll i~ ~Iniformly lowæred by uniform heat ~rzlnl3~er a~ac:o~pli~hed by unl~or~n h~at ~moval by the ~ olant 1~0 ~n the annulAr c~701ant p~ssag~ ~06.
Cool~nt i~low ~urbulf~nc~ i~s g~nerated between 'che rotatlng ~ut~r rol~ 12 and the inne~ ~oll z~s~mbly 14.
25 Incr~ ed h~ant tran~Per oc~urs as 'che~ coolz~nt l~0 pa8~8 O~la~ tu~bulen~ indu¢er bar. 48a-q8n lo~at~
l~ng~tud.~ ally along ~che ~;ylindrlcal s~gm~nt~; 18a and l~b. I21 the alt~rnativ~ the turbulence induce~c b~rs ~8a-4~n ca~ b~ located on ~hæ inr~er surface o~ the 3û outer xoll 12 ~o a~::complish th~ ~;am~ tu;rbulenc~
~n~ lon. ~rh~ tuxbuletlce ~.n~ucer b~rs 48a-4P~n can ,, also be suspended in the coolant flow between the outer and inner roll assembli~s. 11 3 ~
,, , ~ 18 ~:
:~3~
E8CRIP$ION OF TX~ A~T~RNAT~V~ ODIMEN~
~ I0. 8 illustrates an alternative embodimPnt o~ a chill roll ~70, wher~ all numerals corxespond to those elemen~s previously described, featuring ~ 601id operator end journal 172 and a driva end journal 174 witb concentric ~upply and return pa~ssage tubes or orifices. A coolant return tub~ 176 i~ concentrically aligned in hole 178 of the drive end journal 174 and terminates in hole 180 of a plug 181, and conn~cts to the coolant return chamber 24b. Plug 181 divides the center tube 24 into a coolant supply chamber 24a and a coolant return chamber 24b. An annular coolant supply chamber 182 locates concentrically in the drive end journal 174 between the sides of the hole 178 and about the outer circumference oP the return tube 176.
In operation, coolant 160 enters the annular coolant supply chamber 182, proceeds into the coolant supply cha~ber 24a, and flows through holes 102a-102n, through ~oolant supply header 20, through holes 126a-1~6~, through annular soolant pa~sage 106circum~er~ntially about the innor roll a~se~bly 14 a~
previou~ly describe~, through hole~ lQ4a-104n and into the coolant return chamber 24b. Coolant 160 procead~
~ro~ tha coolant rsturn chamber 24b ~hrough an ori~ice ~84 in ~nd through the r turn tub~ 176. An ext~rnal rotary joint connect~ over the drive ~nd ~ournal 1~4 .
for pa~age o~ tha coolant 160 in their re pective directlons through the annular coolant supply chamber 182 and return tube 176.
'~, , ... .
~ 3 ~
Various modifis::ations can be made to the present invention without departing from the apparent scope thereo:E. The chill roll can be us~d as a pap~r or web dryer. The chill roll can al50 be utilized in other 5 applications in addition to the printing industry. The turbulence bar~ can ba arr~nged in ~ny geom~.trical con~i~uration to enhance heat tran~er.
;coolant ~upply header 20 where the uni~or~ temperatur2 ::~coolant, not yQt expos~d to out-roll heat gradiant, i~
uni~ormly directed and distributad hori~ontally and laterally through th~ plurality of holes 126a-12~n and into th~ annul~r coolant passa~e 106.
Wlth re~rence to FIG~ 7, movement o~ uniform tamperatur~ coolant 160 ~rom hole~ 126a-126n locatsd ~;along t~:length of the coolant supply header 20, and rvtary motion o~ the outer roll 12 by means o~ 1nertial feed cause3 coolant 160 to circumPerentially traverae along th~ ~;yl~ ndr~ l segment 18a of th~ inner roll assem~ly 14, and with~ the annular coolant passag~ 106 to the plural~y o~ hoï~; 12~a-12~n in the coolant return ll~ader 2~. ~h~ coolall'c 160, with a 5 ~ubs~2ln~ially increased te~nperature, is collec ed by tha c:oola~ r~turn headar ~2 through hlols~ 1213a~128n.
The waxm,lsd coolant 160 is col lected ancl p~sse~ thxough 1~51~ 04a 1~4n into the ~oolant return chamber 24b and ~v~rb~ard through the coc~lant outlet ori~ic~ 4~.
lV Coolant 160 i~ distributed uniPormly along the entire length of the inner roll assembly 14 by ~c~e hole~ 126~-126n ln the coolant supply ~eader ~o, and causes heat-trans~er fxom the outer roll 12 ~c~ the coolarlt 160 ~o be ~nlf~rm across the ~nnula~ coolant p~ssage 106.
1~ portion o~ th~ oolant p~oc~eeds full ci~le be~ond ~he ~oolant rseturn h~ader ~2, pas~ and by the c~lind~ical ~egment l~b o~ th~ inner roll assem3: 1y 14, and a~so continues l;o :~move heat ~Erom ~hl3 outer roll 12 in a un~ rm ~ashion. T~ tempe~a~ure acro~8 the xo~atlng 20 ouker roll i~ ~Iniformly lowæred by uniform heat ~rzlnl3~er a~ac:o~pli~hed by unl~or~n h~at ~moval by the ~ olant 1~0 ~n the annulAr c~701ant p~ssag~ ~06.
Cool~nt i~low ~urbulf~nc~ i~s g~nerated between 'che rotatlng ~ut~r rol~ 12 and the inne~ ~oll z~s~mbly 14.
25 Incr~ ed h~ant tran~Per oc~urs as 'che~ coolz~nt l~0 pa8~8 O~la~ tu~bulen~ indu¢er bar. 48a-q8n lo~at~
l~ng~tud.~ ally along ~che ~;ylindrlcal s~gm~nt~; 18a and l~b. I21 the alt~rnativ~ the turbulence induce~c b~rs ~8a-4~n ca~ b~ located on ~hæ inr~er surface o~ the 3û outer xoll 12 ~o a~::complish th~ ~;am~ tu;rbulenc~
~n~ lon. ~rh~ tuxbuletlce ~.n~ucer b~rs 48a-4P~n can ,, also be suspended in the coolant flow between the outer and inner roll assembli~s. 11 3 ~
,, , ~ 18 ~:
:~3~
E8CRIP$ION OF TX~ A~T~RNAT~V~ ODIMEN~
~ I0. 8 illustrates an alternative embodimPnt o~ a chill roll ~70, wher~ all numerals corxespond to those elemen~s previously described, featuring ~ 601id operator end journal 172 and a driva end journal 174 witb concentric ~upply and return pa~ssage tubes or orifices. A coolant return tub~ 176 i~ concentrically aligned in hole 178 of the drive end journal 174 and terminates in hole 180 of a plug 181, and conn~cts to the coolant return chamber 24b. Plug 181 divides the center tube 24 into a coolant supply chamber 24a and a coolant return chamber 24b. An annular coolant supply chamber 182 locates concentrically in the drive end journal 174 between the sides of the hole 178 and about the outer circumference oP the return tube 176.
In operation, coolant 160 enters the annular coolant supply chamber 182, proceeds into the coolant supply cha~ber 24a, and flows through holes 102a-102n, through ~oolant supply header 20, through holes 126a-1~6~, through annular soolant pa~sage 106circum~er~ntially about the innor roll a~se~bly 14 a~
previou~ly describe~, through hole~ lQ4a-104n and into the coolant return chamber 24b. Coolant 160 procead~
~ro~ tha coolant rsturn chamber 24b ~hrough an ori~ice ~84 in ~nd through the r turn tub~ 176. An ext~rnal rotary joint connect~ over the drive ~nd ~ournal 1~4 .
for pa~age o~ tha coolant 160 in their re pective directlons through the annular coolant supply chamber 182 and return tube 176.
'~, , ... .
~ 3 ~
Various modifis::ations can be made to the present invention without departing from the apparent scope thereo:E. The chill roll can be us~d as a pap~r or web dryer. The chill roll can al50 be utilized in other 5 applications in addition to the printing industry. The turbulence bar~ can ba arr~nged in ~ny geom~.trical con~i~uration to enhance heat tran~er.
Claims (11)
1. Chill roll comprising:
a. cylindrical outer rotating chill roll;
b. cylindrical outer rotating opposing end roll journals supporting said chill roll and with a coolant inlet and a coolant outlet in said journals;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header, said headers secured about a center tube, supported on said end journals, and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. plurality of holes in a coolant supply chamber in a first portion of said center tube and a like plurality of holes in a coolant return chamber in a second portion of said center tube; and, e. plurality of holes in said coolant supply header and in said coolant return header whereby coolant flows through said end journal, said coolant supply chamber, said coolant supply header, in said space between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collect coolant across the rotating outer roll thereby evenly enhancing heat transfer.
a. cylindrical outer rotating chill roll;
b. cylindrical outer rotating opposing end roll journals supporting said chill roll and with a coolant inlet and a coolant outlet in said journals;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header, said headers secured about a center tube, supported on said end journals, and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. plurality of holes in a coolant supply chamber in a first portion of said center tube and a like plurality of holes in a coolant return chamber in a second portion of said center tube; and, e. plurality of holes in said coolant supply header and in said coolant return header whereby coolant flows through said end journal, said coolant supply chamber, said coolant supply header, in said space between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collect coolant across the rotating outer roll thereby evenly enhancing heat transfer.
2. Chill roll of claim 1 including means for creating a high turbulence in said annular space between said rotating roll and said stationary roll, whereby said turbulence means provides for enhanced heat transfer.
3. Chill roll of claim 1 wherein said turbulence means comprises turbulence inducer bars positioned on an outer surface of said inner roll.
4. Chill roll of claim 1 wherein said turbulence mean comprises turbulence inducer bars positioned on an inner surface of said outer roll.
5. Chill roll comprising:
a. cylindrical outer rotating chill roll;
b. cylindrical outer rotating opposing end roll journals supporting said chill roll and with a coolant inlet and a coolant outlet in said journals;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header, said headers secured about a center tube, supported on said end journals, and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. plurality of holes in a coolant supply chamber in a first portion of said center tube and a like plurality of holes in a coolant return chamber in a second portion of said center tube;
e. plurality of holes in said coolant supply header and in said coolant return header whereby coolant flows through said end journal, said coolant supply chamber, said coolant supply header, in said space between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer; and, f. means on said cylindrical inner stationary roll for creating turbulence in an annular space between said rotating roll and said stationary roll for enhancing heat transfer.
a. cylindrical outer rotating chill roll;
b. cylindrical outer rotating opposing end roll journals supporting said chill roll and with a coolant inlet and a coolant outlet in said journals;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header, said headers secured about a center tube, supported on said end journals, and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. plurality of holes in a coolant supply chamber in a first portion of said center tube and a like plurality of holes in a coolant return chamber in a second portion of said center tube;
e. plurality of holes in said coolant supply header and in said coolant return header whereby coolant flows through said end journal, said coolant supply chamber, said coolant supply header, in said space between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer; and, f. means on said cylindrical inner stationary roll for creating turbulence in an annular space between said rotating roll and said stationary roll for enhancing heat transfer.
6. Chill roll comprising:
a. a cylindrical outer rotating chill roll;
b. opposing drive end journal and an end journal supporting said roll and with a coaxial inlet and outlet in said drive journal;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header and said headers secured about a center tube, supported on said and journal and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. coolant return tube concentrically aligned in a hole of said drive end journal and terminating at a hole in a plug at a mid-portion of said center tube;
e. a coolant supply chamber between said coolant return tube and said center tube, said coolant supply header positioned about an outer circumference of said canter tube;
f. a coolant return chamber in said center tube and between said plug and said end journal, and said coolant return header positioned about an outer circumference of said center tube;
g. plurality of lower and upper holes in said coolant supply header; and, h. plurality of upper and lower holes in said coolant return header whereby coolant flows through said drive end journal, said coolant supply chamber, said coolant supply header, in said space, between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer.
a. a cylindrical outer rotating chill roll;
b. opposing drive end journal and an end journal supporting said roll and with a coaxial inlet and outlet in said drive journal;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header and said headers secured about a center tube, supported on said and journal and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. coolant return tube concentrically aligned in a hole of said drive end journal and terminating at a hole in a plug at a mid-portion of said center tube;
e. a coolant supply chamber between said coolant return tube and said center tube, said coolant supply header positioned about an outer circumference of said canter tube;
f. a coolant return chamber in said center tube and between said plug and said end journal, and said coolant return header positioned about an outer circumference of said center tube;
g. plurality of lower and upper holes in said coolant supply header; and, h. plurality of upper and lower holes in said coolant return header whereby coolant flows through said drive end journal, said coolant supply chamber, said coolant supply header, in said space, between said rolls, said coolant return header, said coolant return chamber, and out said end journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer.
7. Chill roll of claim 6 including means for creating a high turbulence in an annular space between said rotating roll and said stationary roll, whereby said turbulence means provides for enhanced heat transfer.
8. Chill roll of claim 6 wherein said turbulence means comprises turbulence inducer bars positioned on an outer surface of said inner roll.
9. Chill roll of claim 6 wherein said turbulence means comprises turbulence inducer bars positioned on an inner surface of said outer roll.
10. Chill roll of claim 6 including a weight in said lower cylindrical segment.
11. Chill roll comprising:
a. a cylindrical outer rotating chill roll:
b. opposing drive end journal and an and journal supporting said roll and with a coaxial inlet and outlet in said drive journal;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header and said headers secured about a center tube, supported on said end journal and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. coolant return tube concentrically aligned in a hole of said drive end journal and terminating at a hole in a plug at a mid-portion of said center tube;
e. a coolant supply chamber between said coolant return tube and said center tube, said coolant supply header positioned about an outer circumference of said center tube;
f. a coolant return chamber in said center tube and between said plug and said end journal, and said coolant return header positioned about an outer circumference of said center tube;
g. plurality of lower and upper holes in said coolant supply header;
h. plurality of upper and lower holes in said coolant return header whereby coolant flows through said drive and journal, said coolant supply chamber, said coolant supply header, in said space, between said rolls, said coolant return header, said coolant return chamber, and out said and journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer;
and, j. means on said cylindrical inner stationary roll for creating turbulence in an annular space between said rotating roll and said stationary roll for enhancing heat transfer.
a. a cylindrical outer rotating chill roll:
b. opposing drive end journal and an and journal supporting said roll and with a coaxial inlet and outlet in said drive journal;
c. cylindrical inner stationary roll including opposing upper and lower cylindrical segments secured to a coolant supply header and a coolant return header and said headers secured about a center tube, supported on said end journal and of a diameter less than that of said outer chill roll with an annular space therebetween;
d. coolant return tube concentrically aligned in a hole of said drive end journal and terminating at a hole in a plug at a mid-portion of said center tube;
e. a coolant supply chamber between said coolant return tube and said center tube, said coolant supply header positioned about an outer circumference of said center tube;
f. a coolant return chamber in said center tube and between said plug and said end journal, and said coolant return header positioned about an outer circumference of said center tube;
g. plurality of lower and upper holes in said coolant supply header;
h. plurality of upper and lower holes in said coolant return header whereby coolant flows through said drive and journal, said coolant supply chamber, said coolant supply header, in said space, between said rolls, said coolant return header, said coolant return chamber, and out said and journal, and said stationary inner roll distributes and collects coolant across the rotating outer roll thereby evenly enhancing heat transfer;
and, j. means on said cylindrical inner stationary roll for creating turbulence in an annular space between said rotating roll and said stationary roll for enhancing heat transfer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US20307588A | 1988-06-07 | 1988-06-07 | |
| US203,075 | 1988-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1310840C true CA1310840C (en) | 1992-12-01 |
Family
ID=22752387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000601904A Expired - Lifetime CA1310840C (en) | 1988-06-07 | 1989-06-06 | Chill roll |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0346046B1 (en) |
| JP (1) | JPH0225333A (en) |
| CA (1) | CA1310840C (en) |
| DE (1) | DE68910193T2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19812149A1 (en) | 1998-03-20 | 1999-09-23 | Heidelberger Druckmasch Ag | Chill roll |
| DE10305917B4 (en) * | 2002-03-13 | 2015-06-25 | Goss Contiweb B.V. | Chill roll with a substantially hollow interior |
| JP4598574B2 (en) | 2005-03-17 | 2010-12-15 | 東芝機械株式会社 | Heating and cooling roll |
| JP5339204B2 (en) * | 2009-08-05 | 2013-11-13 | 株式会社リコー | Cooling device and image forming apparatus |
| JP5483174B2 (en) * | 2009-11-11 | 2014-05-07 | 株式会社リコー | Cooling device and image forming apparatus |
| US8606138B2 (en) | 2009-08-05 | 2013-12-10 | Ricoh Company, Limited | Cooling device having a turbulence generating unit |
| JP5557098B2 (en) * | 2010-07-07 | 2014-07-23 | 株式会社リコー | Cooling device and image forming apparatus |
| AT514810B1 (en) * | 2013-09-23 | 2015-04-15 | Blum Gmbh Julius | Floating support roller |
| CN115091738B (en) * | 2022-06-16 | 2023-07-21 | 浙江启德新材料有限公司 | Transparent PVC decorative film processing device and production method |
| DE102022211429A1 (en) * | 2022-10-27 | 2024-05-02 | Bhs Corrugated Maschinen- Und Anlagenbau Gmbh | Tempering roller arrangement |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE25927E (en) * | 1957-04-10 | 1965-12-07 | Drying drum amd method | |
| GB869890A (en) * | 1957-12-03 | 1961-06-07 | Inta Roto Machine Company Inc | Improvements in and relating to heat exchange rolls |
| FR2187097A5 (en) * | 1970-07-17 | 1974-01-11 | Gatineau Ets Sa | |
| DE2209498A1 (en) * | 1972-02-29 | 1973-09-06 | Maschf Augsburg Nuernberg Ag | CHILLING ROLLER FOR TRACKS |
| JPS4926655A (en) * | 1972-07-06 | 1974-03-09 | ||
| US4120349A (en) * | 1976-10-12 | 1978-10-17 | Beloit Corporation | Heat transfer roll |
| DE2927198A1 (en) * | 1979-07-05 | 1981-01-15 | Maschf Augsburg Nuernberg Ag | COOLING ROLLER WITH AN OUTER ROLL COVER AND AN INNER BODY |
| JPS57146433A (en) * | 1981-03-06 | 1982-09-09 | Oki Electric Ind Co Ltd | Manufacture of snap disk |
| JPS608045A (en) * | 1983-06-27 | 1985-01-16 | Nitto Electric Ind Co Ltd | Bonding method of adhesive film |
-
1989
- 1989-06-05 EP EP89305651A patent/EP0346046B1/en not_active Expired - Lifetime
- 1989-06-05 DE DE1989610193 patent/DE68910193T2/en not_active Expired - Fee Related
- 1989-06-06 CA CA000601904A patent/CA1310840C/en not_active Expired - Lifetime
- 1989-06-07 JP JP14504889A patent/JPH0225333A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0346046A2 (en) | 1989-12-13 |
| EP0346046A3 (en) | 1990-02-28 |
| EP0346046B1 (en) | 1993-10-27 |
| DE68910193T2 (en) | 1994-02-17 |
| JPH0225333A (en) | 1990-01-26 |
| DE68910193D1 (en) | 1993-12-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |