CA1252618A - Method and an apparatus for the manufacture of heat exchanger rolls - Google Patents
Method and an apparatus for the manufacture of heat exchanger rollsInfo
- Publication number
- CA1252618A CA1252618A CA000450593A CA450593A CA1252618A CA 1252618 A CA1252618 A CA 1252618A CA 000450593 A CA000450593 A CA 000450593A CA 450593 A CA450593 A CA 450593A CA 1252618 A CA1252618 A CA 1252618A
- Authority
- CA
- Canada
- Prior art keywords
- web
- webs
- winding
- roll
- station
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/027—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers by helically or spirally winding elongated elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
Landscapes
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Winding Of Webs (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Laminated Bodies (AREA)
- Press Drives And Press Lines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A method and an apparatus for the manufacture of heat--exchanger rolls. The roll consists of two webs of material which are wound together in superposed relationship. One of the webs is corrugated and formed with protrusions/dents at the crests and bottoms of the corrugations. The second web is provided with lengthwise ribs having the same configuration as the protrusions/dents. When the webs are wound into a roll a radial pressure is exerted on the wheel in order to press the ribs efficiently into the protrusions/dents and to achieve efficient and safe interconnection of the various winding turns making up the roll. To impart a tension in said webs a retarding (braking) force is applied thereon during the winding-on of the webs.
The invention also comprises an apparatus for performing the method, the pressure and braking force on said webs being exerted by a pressure roller.
A method and an apparatus for the manufacture of heat--exchanger rolls. The roll consists of two webs of material which are wound together in superposed relationship. One of the webs is corrugated and formed with protrusions/dents at the crests and bottoms of the corrugations. The second web is provided with lengthwise ribs having the same configuration as the protrusions/dents. When the webs are wound into a roll a radial pressure is exerted on the wheel in order to press the ribs efficiently into the protrusions/dents and to achieve efficient and safe interconnection of the various winding turns making up the roll. To impart a tension in said webs a retarding (braking) force is applied thereon during the winding-on of the webs.
The invention also comprises an apparatus for performing the method, the pressure and braking force on said webs being exerted by a pressure roller.
Description
~5'~
The subject invention concerns a method and an apparatus for the manufacture of heat-exchanger rol.ls comprising two webs which are wound about each other in ~uperposed relationship, one oF said webs being corrugated, i.e.
; formed with crosswise ridges and grooves, and which webs are provided with respectively dents and ribs extending in the lengthwise direction of the webs and preferably having a depth which is less the depth of the ridges and grooves of the corrugations. Ooth the corrugations snd lû the dents and ribs are imparted to the webs with the aid of rollers which are arranged to engage the respectivs web while the latter is being supplied to a winding-on station.
The Swedi~h Patent Application 8û08011-2 describes one type of heat-exchanger wheel which is principally different from the heat-exchanger wheels which were in existence up to the advent of the invention described in the Patent Application referred to. Prior-art heat-exchanger rolls or whee~s were manufactured by glueing together the various webs of foil making up the roll. The roll in accordance with thH Swedish P'atent Application referred to, on the other hand, consists of two webs of material which webs are held together in the manner described in the aforegoing, that is, by providing dents and ribs in the two webs and by winding the two webs together in superposed relati~nship in such a manner that these dents/ribs intermesh and thus immobilise the two we~s relative to one anothsr in the axial direction of the wheel. In this manner is obtained a heat--exchanger roll the efficiency o~ which widely surpasses the efficiency of heat-exchanger rolls of prior-art types.
The purpose of the subject invention is to show a method and an apparatus devised to manufacture heat-exchanger rolls of the type described above. The method in accordance with the invention i~ charactsrised by applying on one o~
said webs, at the web winding-on station, a pressure which O is exerted in the radial direction of the heat-exchanger wheel in order to press the dents Formed in said web into the matching ribs formed in the second web snd in order to press together the winding turns making up the wheel and applying, during the winding of said two webs into the roll, a braking force on the web which is formed with the length-wise ribs.
The apparatu~ in accordance with the invention comprises a station designed to impart the profile con-figuration of the first web through rolling, said station ?0 designed to impart crnss-wise ridges and grooves in said web, said ridges and grooues formed at the crests and bottoms with respective protrusions/dents, a second station designed to impart lengthwise ribs in the second web, and a winding-on station wherein the two webs are wound onto one another in superposed relationship to form the roll. The apparatus is characterised in that mean3 are provided to press tha two webs together and to exert a retarding action thereon in order to impart a lengthwise tensiDn in said wsbs when they are wound into a roll in the winding-on station~
Further characteristics of the invention will become apparent from the depandent claims.
Tha inv~ntion will be deserib2d in closer detail in the fnllowing with re~sr~nce to the accompanying drawings, wherein fig. 1 is a general lateral Vi9W 0~ an apparatus in accordance with th~ invention, fig. 2 is a view of ths apparatus as ssen from ths right with referanne to Fig, 1, Fig. 3 is a partial vi~w fro~ the side o~ a pair 4f rollers ~ur~ing part of the apparatus in accordance with the invention, Fig~ 4 is a cross-~ecti~nal view o~ the same pair of rollers ~s seen along lina IV-I~ of Fig. 3, Fig, 5 is a cross-sectional view on ~ larger scale along line U-V of Fig~ 1, through a pressuru roller de-signed to abut ag'ain~t a hsat-0xchanger ~oll manu~
facturad by means o~ an apparatus in acc~rdance with the invention 9 Fig, 6 is a general viaw of a heat-exch~ng~r roll, and Fig. 7 is a detail vi~w of a part of th~ h~at- exchanger wheal, shnwing tha principle of ths design thareof.
:3L2~
A heat-exchanger ro.ll 10 of th0 kind described in tha introduction hereto oonsists of two webs of material, preferably of ~luminium ~oil~ a first web 12 and a second web 14. At tha on~et of the manufacturing procees the two webs ars wound ont~ ~upply rolle, dnnominated respectively 16 and 18.
The first w0b 12 i8 ~uppli~d from the roll 16 ~nd i8 carried over a jerks and pr~ssure comp~nsating device 20 and further onto a plate 22 up to a roller station 24.
The latter oempris~s two p~irs of rollers, one ~f which c~nsi~ts of rollers 26 and 28 and i~ shown in Figs. 3 and 4, These rollers 26, 28 are provided with axially extsnding flanges }0 and 32, rasp~ctively, whioh are positioned at even pitch spaciRgs across th~ two rollers 26, 28. The roller 28 is formed with projeoting memQerS 36 on the flangos 32 and the roller body proper, thase projactlng members 36 surving to shape pr~truQions/dents 34 at respsctively the crests and bottoms of th~ corrugations formed in the wab 12. Ths opposite roller 26 of the pair is formed with matching indents 38 extending periph0rally acroes the cylindrical face of the rollar. ~efore the web 12 arri~es up to roller pair 26, 28 corrugations are made therein as the web pass~s through ths nip of a first pair nf rollers forming roller station 24. The first pair of rollsr3 is si~ilar to roller p~ir 26, 28 but has no members corresponding to the proJscting ~embers 36 or to the indonts 38. The two roller pairs of roller station 24 are drivon in mutual synchrony by a motor 40.
Th~ w~b 12 is carricd further to a pendulum means 42 and ouer ~ wheel 44 suspnnded at the end of on~ oF
its arlns,Ths pendulu~ serves to equalize tensile stress in the web 12. The pendulum 42 is provided with a sensing means (not shown but pre~orably con~isting of a potentio-meter positioned at the journalling point of the pendulum 42), said sensing mean6 arranged to ~it a signal to control the ~peed o~ the ~otor 40~
From the pendulu~ 42 th~ web 12 is carricd around a fixed dcflector wheel 46 and fram there to the winding on station..
The second web 14 ~f makerial i~ wound ofF the roll 18 and is carried ovor a pressure or jsrk compensating me~ber 48 c4rrssponding to compen3ating ~ember 20. From the compensating member 48 the web 14 ie carried to a deflector rollsr 50 corr~spondlng to th~ de~lcctnr roller 46 serving web 12. The web 14 ls carried ~urther up to a second rollnrstation 52 comprising two pairs of rollsrs arrangcd to shape lengthwise ribs into th~ web 14. For this purpose one of the rollors of th~ pair is provided with circu~ferentially ext~nding ridges on its cylinder face whereas the second roller of the p~ir is ~orm~d with matching grooves, The ribs of the web 14 match the protrueions/dents 34 of tha web 12.
, . . .
~z~
The roller station 52 also comprisee a sensing meane (prhferab1y in the form of a tachometer, nst shown), which i~ arranged to amit controlling signals to the motor 40 to adjust the speed thareof to the advancing spead of the web 14.
The two wsbs 12 and 14 are wound into the heat-exchanger roll 10. A plate 54 ls arranged to guid0 th~ web 14 l~terally when the web is wound onto the roll 10. The s~cond web 12 abuts against the,web 14 and is guided laterally towards the roll 10. A pr~ssure roller 56 providnd with beads 57 which are shape~ to match the ribs formed in the web 14 is arranged to exert a pressure against the rDll 10 during the winding-on op~ration, which means that each newly wound-on turn of the webs 12, 14 is pressed into the already wound-on turns with ths pratrusions/dents of wsb 1 inter-meshing with the ribs of web 14. This resul~s in a safe gripping bond between the wsb~ 12, 14 and avoidance of play between the web winding turns. In addition any une~enness is straightenad out, In operation, the heat--exchanger whael will be exposed to strsss in its axial directi~n, such ~tress being Hxarted by the air flowing through and against the heat exchanger roll 10. The ability to take such stress is highly improved by a wheal wharein the winding turns are prassed hard togethar in accordance ~.ith th~ invention. During winding-on of the r~ll, the webs 12, 14 sre also stretched by the braking action , 6~
exsrtsd on the pressure roller 56. Stretching of the webs means that the eFfect of the pr6ssing-together action and o~ the tsnsion imparted to the webs by means of the pressure roller 56 are permanented and remain ln the finishsd rull 10.
The outer~ost turns of the wheel 10 are rivetsd together and/or the wheel 10 is equipped with an external ring keeping the wheel tog~ther and maintaining the tension imparted to th~ w,heel during the winding operation.
The pressura roller 56 is shown in Fig. 5 and consists of a cylindrical body 58 which is rotatably mounted on a shaft 60. The latter is removably but non-rotat~onall~
mountsd in a frame 62. A brake disc 64 is arranged to be pressed against one of the end walls 66 of the cylindrical body. This is effected with the aid of a bolt 70 which is provided with projecting arms 68 and which is screwed onto ; threads 72 formed on ths shaft 60, whereby the brake shoas 74 of the brake disc 64 are pressed against the cylinder body Qnd wall 66, effecting a braking action on the pressure roller 56. The brake disc 64 i5 formed with a flange running in a groove 76 f'ormed in ths sha~t 60, thus preventing the brake disc 64 from being rotated upon braking. The pressure raller 56 is pressed against the roll 10 by a counter-weight 78 (see Fig. 2) to which it is attachsd by means of a wire B2 carried about a pulley 80 and attached :LXS~
to the frame 62 of the pressure roller. The frame 62 is provided with wheels a4 which are arranged to run along the stand 86 supporting ths wheal 10 and controlling the movements of the frame 62.
Figs. 6 and 7 show the general appearance of the heat-exchanger roll 10 and the principle of its structure.
Fig. 7 shows a section of ths roll 1û. For the sake of simplicity, the view of Fig, 7 does not take intn considara-tion the curvature of the roll 10, Fig, 7 shDws clearly the provision ln web 14 of l~ngthwise ribs 88 and in web 12 o~ matching protrusions/dents 34 formed at respectively the ridge crasts and the groove bottoms of the corrugations formed in web 12. The inter~ngagament is effected between the protrusions/dents 34 and the ribs B8 during the winding-on of the webs 12, 14 into the wheel 10. It should be mentioned that the ribs eB furmed in the web 14 ara dimensioned to ensur~ that the relationship between the width at the upper rib ~dge, the width at the lower rib edge and the rib spacinga across the wcb 14 is approximat0ly 1:2:8.
As appears ~rom Fig, 7 the ridge crests 92 of tha corrugations of the web 12 will, upon winding-on uf the webs 12, 14, ba displaced in the majority of the winding turns in relation to the groove bottoms 94 of tha immediately adjacent winding turn o~ tha web 12. Whan the prsssurs raller 56 press~s the various winding turns togsther this rasults in such a daformation oF the web 14 that in the manner illustrated in Fig. 7 this web will take on a wavy configuration in its lengthwise extension. This lasting rssilient deformatien nf the ~eb 14 ensures that thc two webs are held firmly together during the operation of the wheal 10 and conssquently is a further guarantee against separating forcas actins aKially on ths whcel 10.
Experiments made with heat-exchanger rolls manufac~
tured in accordance with the invention show that with suitable choice of the pr~ssures and of ths braking force with which the pressure rollcr 56 acts upon tha w~bs 12, 14 upon their winding-on onto the roll 10, a roll 10 may be obtained having such charact~ristics that it remains within its elasticity range/area when exposed to the dcformation furces that occur during normal operation~ When an angleo~
of 65 is chosen for the corrugations, a pr~ssure of the magnitude of 50N and a braking ~orcs of 70N re ult in a wheel 10 that pos~sses characteristics that maka the whsal fully ~atisfactory in op~tion~ When largsr tensional forcss are chosen, ~urthar improvsd operativa charac-teristics are obtaine~ and the elasticity range/area is widaned.
Ths roll 10 is wound onto a sha~t 96 serving as a winding COEe . During the winding-on operation the shaft is driven by a motor 98 which is connected to the shaft 96 via a gear mechanism 100.Ths shaft 96 is in ths shape g _ : ' .
of a slaeve and is provided with an intarnal axially movable shaft 102 the outer end of which projacts beyond the sleeve shaft 96 and is formed with threads on which an outer rslief disc 104 may be attachad. At its opposlte end the inner shaft 102 is provid~d with through holes or grooves in which is mountcd a bar 106, which bar also runs through a grooue in the outer shaft 960 Ths bar 106 is arranged te urge an inner relief disc 108 against the roll 10 in order to clamp the latter in position between the discs 104, 108 during ths wlnding of the roll so that when the wound roll 10 has reached a predetermined size the discs act to relieve the inner winding turns oF the roll 10 when furthcr turns are wound thareon. The innar shaft 102 rotates togathar with the sleeve-shaped shaft 96. The con truction comprising an inner, axially movable shaft 102 allows some axial movement of the relief discs 104, 108 relative to the shaft 96, which further increases tho clampiRg effect obtained with the aid of the relief discs 104, 10B.
The embodiment of the invention describsd abova is to be regarded as an example thareof and a variety of modifications are poæsible within the scop0 of th~
appended claimc. For instancc, tho pressure force by means of which the pressore roller 56 acts on the wheel 10 could be obtained by hydraulic or pneumatic ~eans rather than by a counter-weight 7Q.
The subject invention concerns a method and an apparatus for the manufacture of heat-exchanger rol.ls comprising two webs which are wound about each other in ~uperposed relationship, one oF said webs being corrugated, i.e.
; formed with crosswise ridges and grooves, and which webs are provided with respectively dents and ribs extending in the lengthwise direction of the webs and preferably having a depth which is less the depth of the ridges and grooves of the corrugations. Ooth the corrugations snd lû the dents and ribs are imparted to the webs with the aid of rollers which are arranged to engage the respectivs web while the latter is being supplied to a winding-on station.
The Swedi~h Patent Application 8û08011-2 describes one type of heat-exchanger wheel which is principally different from the heat-exchanger wheels which were in existence up to the advent of the invention described in the Patent Application referred to. Prior-art heat-exchanger rolls or whee~s were manufactured by glueing together the various webs of foil making up the roll. The roll in accordance with thH Swedish P'atent Application referred to, on the other hand, consists of two webs of material which webs are held together in the manner described in the aforegoing, that is, by providing dents and ribs in the two webs and by winding the two webs together in superposed relati~nship in such a manner that these dents/ribs intermesh and thus immobilise the two we~s relative to one anothsr in the axial direction of the wheel. In this manner is obtained a heat--exchanger roll the efficiency o~ which widely surpasses the efficiency of heat-exchanger rolls of prior-art types.
The purpose of the subject invention is to show a method and an apparatus devised to manufacture heat-exchanger rolls of the type described above. The method in accordance with the invention i~ charactsrised by applying on one o~
said webs, at the web winding-on station, a pressure which O is exerted in the radial direction of the heat-exchanger wheel in order to press the dents Formed in said web into the matching ribs formed in the second web snd in order to press together the winding turns making up the wheel and applying, during the winding of said two webs into the roll, a braking force on the web which is formed with the length-wise ribs.
The apparatu~ in accordance with the invention comprises a station designed to impart the profile con-figuration of the first web through rolling, said station ?0 designed to impart crnss-wise ridges and grooves in said web, said ridges and grooues formed at the crests and bottoms with respective protrusions/dents, a second station designed to impart lengthwise ribs in the second web, and a winding-on station wherein the two webs are wound onto one another in superposed relationship to form the roll. The apparatus is characterised in that mean3 are provided to press tha two webs together and to exert a retarding action thereon in order to impart a lengthwise tensiDn in said wsbs when they are wound into a roll in the winding-on station~
Further characteristics of the invention will become apparent from the depandent claims.
Tha inv~ntion will be deserib2d in closer detail in the fnllowing with re~sr~nce to the accompanying drawings, wherein fig. 1 is a general lateral Vi9W 0~ an apparatus in accordance with th~ invention, fig. 2 is a view of ths apparatus as ssen from ths right with referanne to Fig, 1, Fig. 3 is a partial vi~w fro~ the side o~ a pair 4f rollers ~ur~ing part of the apparatus in accordance with the invention, Fig~ 4 is a cross-~ecti~nal view o~ the same pair of rollers ~s seen along lina IV-I~ of Fig. 3, Fig, 5 is a cross-sectional view on ~ larger scale along line U-V of Fig~ 1, through a pressuru roller de-signed to abut ag'ain~t a hsat-0xchanger ~oll manu~
facturad by means o~ an apparatus in acc~rdance with the invention 9 Fig, 6 is a general viaw of a heat-exch~ng~r roll, and Fig. 7 is a detail vi~w of a part of th~ h~at- exchanger wheal, shnwing tha principle of ths design thareof.
:3L2~
A heat-exchanger ro.ll 10 of th0 kind described in tha introduction hereto oonsists of two webs of material, preferably of ~luminium ~oil~ a first web 12 and a second web 14. At tha on~et of the manufacturing procees the two webs ars wound ont~ ~upply rolle, dnnominated respectively 16 and 18.
The first w0b 12 i8 ~uppli~d from the roll 16 ~nd i8 carried over a jerks and pr~ssure comp~nsating device 20 and further onto a plate 22 up to a roller station 24.
The latter oempris~s two p~irs of rollers, one ~f which c~nsi~ts of rollers 26 and 28 and i~ shown in Figs. 3 and 4, These rollers 26, 28 are provided with axially extsnding flanges }0 and 32, rasp~ctively, whioh are positioned at even pitch spaciRgs across th~ two rollers 26, 28. The roller 28 is formed with projeoting memQerS 36 on the flangos 32 and the roller body proper, thase projactlng members 36 surving to shape pr~truQions/dents 34 at respsctively the crests and bottoms of th~ corrugations formed in the wab 12. Ths opposite roller 26 of the pair is formed with matching indents 38 extending periph0rally acroes the cylindrical face of the rollar. ~efore the web 12 arri~es up to roller pair 26, 28 corrugations are made therein as the web pass~s through ths nip of a first pair nf rollers forming roller station 24. The first pair of rollsr3 is si~ilar to roller p~ir 26, 28 but has no members corresponding to the proJscting ~embers 36 or to the indonts 38. The two roller pairs of roller station 24 are drivon in mutual synchrony by a motor 40.
Th~ w~b 12 is carricd further to a pendulum means 42 and ouer ~ wheel 44 suspnnded at the end of on~ oF
its arlns,Ths pendulu~ serves to equalize tensile stress in the web 12. The pendulum 42 is provided with a sensing means (not shown but pre~orably con~isting of a potentio-meter positioned at the journalling point of the pendulum 42), said sensing mean6 arranged to ~it a signal to control the ~peed o~ the ~otor 40~
From the pendulu~ 42 th~ web 12 is carricd around a fixed dcflector wheel 46 and fram there to the winding on station..
The second web 14 ~f makerial i~ wound ofF the roll 18 and is carried ovor a pressure or jsrk compensating me~ber 48 c4rrssponding to compen3ating ~ember 20. From the compensating member 48 the web 14 ie carried to a deflector rollsr 50 corr~spondlng to th~ de~lcctnr roller 46 serving web 12. The web 14 ls carried ~urther up to a second rollnrstation 52 comprising two pairs of rollsrs arrangcd to shape lengthwise ribs into th~ web 14. For this purpose one of the rollors of th~ pair is provided with circu~ferentially ext~nding ridges on its cylinder face whereas the second roller of the p~ir is ~orm~d with matching grooves, The ribs of the web 14 match the protrueions/dents 34 of tha web 12.
, . . .
~z~
The roller station 52 also comprisee a sensing meane (prhferab1y in the form of a tachometer, nst shown), which i~ arranged to amit controlling signals to the motor 40 to adjust the speed thareof to the advancing spead of the web 14.
The two wsbs 12 and 14 are wound into the heat-exchanger roll 10. A plate 54 ls arranged to guid0 th~ web 14 l~terally when the web is wound onto the roll 10. The s~cond web 12 abuts against the,web 14 and is guided laterally towards the roll 10. A pr~ssure roller 56 providnd with beads 57 which are shape~ to match the ribs formed in the web 14 is arranged to exert a pressure against the rDll 10 during the winding-on op~ration, which means that each newly wound-on turn of the webs 12, 14 is pressed into the already wound-on turns with ths pratrusions/dents of wsb 1 inter-meshing with the ribs of web 14. This resul~s in a safe gripping bond between the wsb~ 12, 14 and avoidance of play between the web winding turns. In addition any une~enness is straightenad out, In operation, the heat--exchanger whael will be exposed to strsss in its axial directi~n, such ~tress being Hxarted by the air flowing through and against the heat exchanger roll 10. The ability to take such stress is highly improved by a wheal wharein the winding turns are prassed hard togethar in accordance ~.ith th~ invention. During winding-on of the r~ll, the webs 12, 14 sre also stretched by the braking action , 6~
exsrtsd on the pressure roller 56. Stretching of the webs means that the eFfect of the pr6ssing-together action and o~ the tsnsion imparted to the webs by means of the pressure roller 56 are permanented and remain ln the finishsd rull 10.
The outer~ost turns of the wheel 10 are rivetsd together and/or the wheel 10 is equipped with an external ring keeping the wheel tog~ther and maintaining the tension imparted to th~ w,heel during the winding operation.
The pressura roller 56 is shown in Fig. 5 and consists of a cylindrical body 58 which is rotatably mounted on a shaft 60. The latter is removably but non-rotat~onall~
mountsd in a frame 62. A brake disc 64 is arranged to be pressed against one of the end walls 66 of the cylindrical body. This is effected with the aid of a bolt 70 which is provided with projecting arms 68 and which is screwed onto ; threads 72 formed on ths shaft 60, whereby the brake shoas 74 of the brake disc 64 are pressed against the cylinder body Qnd wall 66, effecting a braking action on the pressure roller 56. The brake disc 64 i5 formed with a flange running in a groove 76 f'ormed in ths sha~t 60, thus preventing the brake disc 64 from being rotated upon braking. The pressure raller 56 is pressed against the roll 10 by a counter-weight 78 (see Fig. 2) to which it is attachsd by means of a wire B2 carried about a pulley 80 and attached :LXS~
to the frame 62 of the pressure roller. The frame 62 is provided with wheels a4 which are arranged to run along the stand 86 supporting ths wheal 10 and controlling the movements of the frame 62.
Figs. 6 and 7 show the general appearance of the heat-exchanger roll 10 and the principle of its structure.
Fig. 7 shows a section of ths roll 1û. For the sake of simplicity, the view of Fig, 7 does not take intn considara-tion the curvature of the roll 10, Fig, 7 shDws clearly the provision ln web 14 of l~ngthwise ribs 88 and in web 12 o~ matching protrusions/dents 34 formed at respectively the ridge crasts and the groove bottoms of the corrugations formed in web 12. The inter~ngagament is effected between the protrusions/dents 34 and the ribs B8 during the winding-on of the webs 12, 14 into the wheel 10. It should be mentioned that the ribs eB furmed in the web 14 ara dimensioned to ensur~ that the relationship between the width at the upper rib ~dge, the width at the lower rib edge and the rib spacinga across the wcb 14 is approximat0ly 1:2:8.
As appears ~rom Fig, 7 the ridge crests 92 of tha corrugations of the web 12 will, upon winding-on uf the webs 12, 14, ba displaced in the majority of the winding turns in relation to the groove bottoms 94 of tha immediately adjacent winding turn o~ tha web 12. Whan the prsssurs raller 56 press~s the various winding turns togsther this rasults in such a daformation oF the web 14 that in the manner illustrated in Fig. 7 this web will take on a wavy configuration in its lengthwise extension. This lasting rssilient deformatien nf the ~eb 14 ensures that thc two webs are held firmly together during the operation of the wheal 10 and conssquently is a further guarantee against separating forcas actins aKially on ths whcel 10.
Experiments made with heat-exchanger rolls manufac~
tured in accordance with the invention show that with suitable choice of the pr~ssures and of ths braking force with which the pressure rollcr 56 acts upon tha w~bs 12, 14 upon their winding-on onto the roll 10, a roll 10 may be obtained having such charact~ristics that it remains within its elasticity range/area when exposed to the dcformation furces that occur during normal operation~ When an angleo~
of 65 is chosen for the corrugations, a pr~ssure of the magnitude of 50N and a braking ~orcs of 70N re ult in a wheel 10 that pos~sses characteristics that maka the whsal fully ~atisfactory in op~tion~ When largsr tensional forcss are chosen, ~urthar improvsd operativa charac-teristics are obtaine~ and the elasticity range/area is widaned.
Ths roll 10 is wound onto a sha~t 96 serving as a winding COEe . During the winding-on operation the shaft is driven by a motor 98 which is connected to the shaft 96 via a gear mechanism 100.Ths shaft 96 is in ths shape g _ : ' .
of a slaeve and is provided with an intarnal axially movable shaft 102 the outer end of which projacts beyond the sleeve shaft 96 and is formed with threads on which an outer rslief disc 104 may be attachad. At its opposlte end the inner shaft 102 is provid~d with through holes or grooves in which is mountcd a bar 106, which bar also runs through a grooue in the outer shaft 960 Ths bar 106 is arranged te urge an inner relief disc 108 against the roll 10 in order to clamp the latter in position between the discs 104, 108 during ths wlnding of the roll so that when the wound roll 10 has reached a predetermined size the discs act to relieve the inner winding turns oF the roll 10 when furthcr turns are wound thareon. The innar shaft 102 rotates togathar with the sleeve-shaped shaft 96. The con truction comprising an inner, axially movable shaft 102 allows some axial movement of the relief discs 104, 108 relative to the shaft 96, which further increases tho clampiRg effect obtained with the aid of the relief discs 104, 10B.
The embodiment of the invention describsd abova is to be regarded as an example thareof and a variety of modifications are poæsible within the scop0 of th~
appended claimc. For instancc, tho pressure force by means of which the pressore roller 56 acts on the wheel 10 could be obtained by hydraulic or pneumatic ~eans rather than by a counter-weight 7Q.
Claims (10)
1. A method of manufacturing heat exchanger rolls comprising two webs which are wound about each other in superposed relationship, one of said webs being corrugated, that is, formed with crosswise ridges and grooves, said webs provided with respectively dents and ribs extending in the lengthwise direction of the webs and having a depth which is less than the depth of the ridges and grooves of the corrugations, both said ridges and grooves and said dents and ribs being imported to said two webs by means of rollers arranged to engage the respective web while the latter is being supplied to a winding-on station, c h a r a c t e r i s e d b y applying on one of said webs, at the web winding-on station, a pressure which is exerted in the radial direction of the heat-exchanger wheel in order to press the dents formed in said one web into the matching ribs formed in the other web and in order to press together the winding turns making up the wheel and applying, during the winding of said two webs into the roll, a braking force on the web which is forced with the lengthwise ribs.
2. A method of manufacturing heat-exchanger rolls as claimed in claim 1, c h a r a c t s r i s e d i n that the braking force is applied on the outermost winding turn of the web which is formed with the lengthwise ribs.
3. An apparatus for performing the method in accordance with claim 1 for the manufacture of a heat-exchanger roll, said apparatus comprising a first station for profile rolling the first web, said station designed to corrugate the first web to impart crosswise ridges and grooves to said first web, the ridge crests and groove bottoms provided, respectively, with protrusions/dents, a second station designed to impart lengthwise ribs in the second web, and a winding-on station, wherein the two webs are wound onto one another in superposed relationship to form the rolls c h a r a c t e r i s e d i n t h a t means are provided to press the two webs together and to exert a retarding action thereon in order to impart a longitudinal tension in said webs when they are wound into the roll in the winding on station.
4. An apparatus as claimed in claim 3, c h a r a c t e r i-s e d i n t h a t the means for pressing together and retarding the two webs during the winding-on operation is a pressure roller which is provided with beads and arranged to be pressed against the web which is provided with the lengthwise ribs during the winding-on of said web.
5. An apparatus as claimed in claim 4, c h a r a c t a r i-s e d i n t h a t the pressure roller having beads thereon is connected with a weight arranged to impart to the pressure roller the force required to press together and retard the webs.
6. An apparatus as claimed in claim 3 charac-terised in that the first roller station wherein the corru-gated web is given its configuration, comprises a pair of rollers, said rollers provided with axial flanges, in that one of said rollers is provided with grooves or indents and in that the second roller is provided with projecting mem-bers by means of which the lengthwise protrusions/dents are formed in the corrugated web.
7. An apparatus as claimed in claim 6, charac-terised in that the pair of rollers is driven by a motor, said motor arranged to drive said pair of rollers at a cer-tain speed, in that a pressure-equalizing pendulum means is positioned following the roller station as seen in the tra-velling direction of the web, in that said web is arranged to run over a wheel mounted on one arm of the pendulum, and that the pendulum is connected to a means sensing the pen-dulum position and designed to emit a control signal to the motor to adjust the speed thereof.
8. An apparatus as claimed in claim 3, charac-terised in that the pressure roller having beads thereon is equipped with a disc brake means to retard the web formed with lengthwise ribs, when said web is being wound onto the roll.
9. An apparatus as claimed in any one of claims 3 to 5, characterised in that the second roller sta-tion is connected to sensing means which in turn are designed to emit a signal to control the speed of the motor to drive the first roller station.
10. An apparatus as claimed in any one of claims 3 to 5, characterised in that a sleeve-shaped shaft is provided to serve as the core onto which are wound the webs into the roll, in that an inner, axially movable shaft is mounted inside said sleeve-shaped shaft, that the inner shaft is formed with a threaded end portion which may be pulled out of the sleeve-shaped shaft, that an outer relief disc is arranged to be mounted on said end portion, that the inner shaft is connected with a means arranged to urge an inner relief disc against the roll in such a manner that the latter is clamped between the two relief discs and in that said relief discs are axially movable relative to the sleeve-shaped shaft by means of said inner, axially movable shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8301730-1 | 1983-03-29 | ||
| SE8301730A SE446601B (en) | 1983-03-29 | 1983-03-29 | DEVICE FOR MANUFACTURING A REVERSE WHEEL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1252618A true CA1252618A (en) | 1989-04-18 |
Family
ID=20350578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000450593A Expired CA1252618A (en) | 1983-03-29 | 1984-03-27 | Method and an apparatus for the manufacture of heat exchanger rolls |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0120828B1 (en) |
| JP (1) | JPS59215595A (en) |
| KR (1) | KR920006675B1 (en) |
| AT (1) | ATE67697T1 (en) |
| AU (1) | AU2615284A (en) |
| CA (1) | CA1252618A (en) |
| DE (1) | DE3485095D1 (en) |
| DK (1) | DK171384A (en) |
| FI (1) | FI80393C (en) |
| NO (1) | NO157807C (en) |
| SE (1) | SE446601B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004001947A1 (en) | 2004-01-13 | 2005-08-04 | Emitec Gesellschaft Für Emissionstechnologie Mbh | Honeycomb bodies of layers with invaginations and layers with counter-structures |
| PL235069B1 (en) | 2017-12-04 | 2020-05-18 | Ts Group Spolka Z Ograniczona Odpowiedzialnoscia | Coil for transmission of heat for the rotary, cylindrical heat exchanger |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2579858A (en) * | 1949-02-10 | 1951-12-25 | Flexitallic Gasket Co Inc | Gasket winding machine |
| US2702166A (en) * | 1952-02-26 | 1955-02-15 | Addison Prod | Machine for forming spiral heat exchange coils |
| DE3011210A1 (en) * | 1980-03-22 | 1981-10-01 | Wilhelm 7486 Scheer Häberle | Multiple-passage heat accumulator - comprises alternate strips with different corrugations assembled together |
| SE444071B (en) * | 1980-11-14 | 1986-03-17 | Sven Melker Nilsson | ROTATING REGENERATIVE EXCHANGER, PROCEDURE FOR ITS MANUFACTURING AND MACHINE FOR IMPLEMENTATION OF THE PROCEDURE |
-
1983
- 1983-03-29 SE SE8301730A patent/SE446601B/en not_active IP Right Cessation
-
1984
- 1984-03-22 NO NO841140A patent/NO157807C/en not_active IP Right Cessation
- 1984-03-23 FI FI841169A patent/FI80393C/en not_active IP Right Cessation
- 1984-03-27 AU AU26152/84A patent/AU2615284A/en not_active Abandoned
- 1984-03-27 CA CA000450593A patent/CA1252618A/en not_active Expired
- 1984-03-28 AT AT84850099T patent/ATE67697T1/en not_active IP Right Cessation
- 1984-03-28 DK DK171384A patent/DK171384A/en not_active IP Right Cessation
- 1984-03-28 DE DE8484850099T patent/DE3485095D1/en not_active Expired - Lifetime
- 1984-03-28 JP JP59058544A patent/JPS59215595A/en active Granted
- 1984-03-28 EP EP84850099A patent/EP0120828B1/en not_active Expired - Lifetime
- 1984-03-29 KR KR1019840001747A patent/KR920006675B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NO157807B (en) | 1988-02-15 |
| KR920006675B1 (en) | 1992-08-14 |
| EP0120828A3 (en) | 1986-12-30 |
| JPH0360040B2 (en) | 1991-09-12 |
| NO841140L (en) | 1984-10-01 |
| EP0120828A2 (en) | 1984-10-03 |
| JPS59215595A (en) | 1984-12-05 |
| SE446601B (en) | 1986-09-29 |
| AU2615284A (en) | 1984-10-04 |
| ATE67697T1 (en) | 1991-10-15 |
| FI80393B (en) | 1990-02-28 |
| DK171384A (en) | 1984-09-30 |
| FI841169A (en) | 1984-09-30 |
| NO157807C (en) | 1988-05-25 |
| DE3485095D1 (en) | 1991-10-31 |
| FI841169A0 (en) | 1984-03-23 |
| DK171384D0 (en) | 1984-03-28 |
| FI80393C (en) | 1990-06-11 |
| SE8301730L (en) | 1984-09-30 |
| SE8301730D0 (en) | 1983-03-29 |
| EP0120828B1 (en) | 1991-09-25 |
| KR840007836A (en) | 1984-12-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SU1369670A3 (en) | Bushless roll of toilet paper and method of manufacturing same | |
| BG61868B1 (en) | Method and machine for the manufacture of packaging materials by paper folding | |
| EP1419985A2 (en) | Wound multi-layer tube having one or more embossed plies | |
| KR19990021979A (en) | Single Pacer with Small Medium Corrugated Roll | |
| US4192050A (en) | Method of making a helically grooved roller | |
| US5271575A (en) | Coreless paper roll manufacturing system | |
| CA1076337A (en) | Edge winding profiled strip on paper machine roll | |
| US5085268A (en) | Heat transmission roll and a method and an apparatus for manufacturing such a roll | |
| CA1252618A (en) | Method and an apparatus for the manufacture of heat exchanger rolls | |
| KR19980086964A (en) | Improved one-sided pacer with small medium corrugated roll | |
| RU2079075C1 (en) | Roll and drying plant | |
| BR0315362B1 (en) | apparatus for continuously joining webs of paper, and method for joining two webs of paper together. | |
| EP0339133B1 (en) | Rail wheel | |
| FI73517C (en) | RULLE AVSEDD FOER VAERMEOEVERFOERING SAMT FOERFARANDE OCH MASKIN FOER DESS FRAMSTAELLNING. | |
| JPH0736739B2 (en) | Device for pulling a tubular casing closer | |
| JPS6151078B2 (en) | ||
| JPH0452217Y2 (en) | ||
| US4039303A (en) | Method of making tubular abrasive cloth | |
| FI57626B (en) | BELAEGGNING MED URGROEPT YTA FOER VALS FOER PAPPERSMASKIN SAMT FOERFARANDE FOER TILLVERKNING AV DENSAMMA | |
| JPS63159017A (en) | Preparation of prepregs | |
| AT112161B (en) | Machine for packing paper rolls etc. like | |
| SU1396982A1 (en) | Machine for spreading mulched coating | |
| DE59702436D1 (en) | Device for producing hollow profiles | |
| HU220648B1 (en) | Apparatus for applying a microcreping on a paper web | |
| DE2424413B2 (en) | METHOD FOR MANUFACTURING A POLYGONAL REEL REEL AND DEVICE FOR CARRYING OUT THIS METHOD |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |