JPH0360040B2 - - Google Patents

Abstract

A method and an apparatus for the manufacture of heat-exchanger rolls (10). The roll (10) consists of two webs (12, 14) of material which are wound together in superposed relationship. One (12) of the webs is corrugated and formed with protrusions/dents at the crests and bottoms of the corrugations. The second web (14) is provided with lengthwise ribs having the same configuration as the protrusion/dents. When the webs (12, 14) are wound into a roll (10) a radial pressure is exerted on the wheel (10) 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 (10). To impart a tension in said webs (12, 14) 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 (56).

Description

DETAILED DESCRIPTION OF THE INVENTION Summary of the Invention A method and apparatus for manufacturing a heat exchange roll 10 are disclosed. The roll 10 consists of two webs of material 12, 14 wound in superimposed relation to each other. One of the webs 12 is corrugated with protrusions/indentations formed at the top and bottom of the waves. Second
The web 14 is provided with longitudinal ribs having the same shape as the protrusions/indentations. Web 12, 14
When winding into the roll 10, radial pressure is applied to the wheel 10 to effectively press the ribs against the protrusions/indentations and to provide efficient and safe reciprocation of each winding comprising the roll 10. achieve. In order to apply tension to the webs 12, 14, a braking force is applied to the webs when the webs are wound up. The invention further includes an apparatus for carrying out this method, applying pressure and braking force to the web by means of a pressure roller 56.

The present invention comprises webs wound in superimposed relation to each other, one of the webs being corrugated and forming transverse ridges and grooves, each of said webs having a groove extending in the longitudinal direction of the web. The present invention also relates to a method and apparatus for manufacturing a heat exchange roll provided with recesses and ribs preferably having a depth smaller than the depth of the wave ridges and grooves.
Both the corrugations and the depressions and ribs are applied to the web by rollers that are positioned to engage each web while the web is being fed to a take-up station.

Swedish patent application No. 8008011-2 is
A type of heat exchange wheel is described that differs in principle from the heat exchange wheels that existed until the advent of the invention described herein. Conventional heat exchange rolls or wheels have been manufactured by gluing together the thin film webs that make up the roll.
On the other hand, the roll according to the Swedish patent application is 2
consisting of two webs of material, which are held together as described above, i.e. by providing the two webs with recesses and ribs and winding these two webs in an overlapping relationship, with the recesses/ribs interlocking. to prevent the two webs from moving relative to each other in the axial direction of the wheel. In this way,
A heat exchange roll is obtained that has an efficiency that vastly exceeds that of conventional heat exchange rolls.

The object of the invention is to provide a method and a device devised for producing heat exchange rolls of the type described above. The method according to the invention involves applying pressure in the radial direction of a heat exchange wheel at a web take-up station to one side of the web, thereby moving the depression formed in the web into the engaging rib formed in the second web. The method is characterized in that a braking force is applied to the web forming the longitudinal direction while the two webs are being wound around the roll by press-fitting the web into the web and pressing the wound material constituting the wheel.

The device according to the invention is adapted to apply this first web to a first web with transverse ridges and grooves, the ridge tops and the groove bottoms being provided with protrusions/indentations, respectively.
a first station designed to make a web into a corrugated shape by rolling; a second station designed to give a longitudinal rib to a second web; It is equipped with a collection station. This device is provided with a means for pressing two webs together and applying a braking action to the webs to apply longitudinal tension to the webs when the webs are wound onto a roll at a winding station. It is characterized by

Other features of the invention will become apparent from the description below.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the present invention will be described in more detail with reference to embodiments with reference to the accompanying drawings.

A heat exchange roll 10 of the type mentioned at the outset consists of two material webs, preferably aluminum foils, namely a first web 12 and a second web 14. At the beginning of the manufacturing process, the two webs are wound onto supply rolls, referenced 16 and 18, respectively.

The first web 12 is fed from a roll 16, passed through a jet and pressure compensator 20, and then transported over a plate 22 to a roller station 24. Roller station 24 is comprised of two pairs of rollers, one of which is comprised of rollers 26 and 28, as shown in FIGS. 3 and 4. The rollers 26, 28 are provided with axially extending flanges 30 and 32, respectively, which are arranged at a uniform pitch across the two rollers 26, 28. The roller 28 has a flange 32 thereof.
and the roller body are formed with protruding members 36 which act to form protrusions/indentations 34 at the crests and bottoms of the waves formed in the web 12, respectively. The other roller 26 has
An engagement recess 38 is formed extending around the outer periphery over the cylindrical surface of the roller. Web 12 is roller pair 2
6, 28, waves are formed in the web as it passes through the nip of the first pair of rollers forming the roller station 24. The first pair of rollers is roller pair 26, 28
, but does not include any member corresponding to the protruding member 36 or the recessed portion 38. The two pairs of rollers of the roller station 24 are driven by a motor 40 in synchronization with each other.

The web 12 is further transported to the pendulum means 42 and past a wheel 44 suspended from the end of one of its arms. This pendulum acts to balance the tensile stresses in the web 12. The pendulum 42 is provided with sensing means (not shown, but preferably consisting of a potentiometer placed at the pivot point of the pendulum 42), which sensing means is arranged to issue a signal for controlling the speed of the motor 40. .

From the pendulum 42, the web 12 passes through a fixed deflection wheel 46 to a take-up station.

The second material web 14 is unwound from the roll 18 and passes through a jerk or pressure compensation member 48 corresponding to the compensation device 20 . This compensation member 4
From 8, the web 14 is transferred to a deflection roll 50, which corresponds to the deflection roller 46 acting on the web 12. Further, the web 14 moves to a second roller station 52 consisting of two pairs of rollers arranged to form longitudinal ribs in the web 14. For this purpose, one of the roller pairs is provided with circumferentially extending ridges on its cylindrical surface, while the other roller is formed with an engagement groove. The ribs of web 14 engage protrusions/indentations 34 of web 12.

Additionally, the roller station 52 includes sensing means (preferably in the form of a tachometer, not shown) arranged to issue a control signal to the motor 40 to adjust the motor speed relative to the forward speed of the web 14.

These two webs 12 and 14 are wound around a heat exchange roll 10. Plate 54 is positioned to laterally guide web 14 as it is wound onto roll 10. The second web 12 is brought into contact with the web 14 and guided laterally in the direction of the roll 10. Pressure roller 5 with bead 57 formed to engage ribs formed in web 14
6 is arranged to exert pressure on the roll 10 during the winding operation, which means that the newly wound web 12, 14 is pressed against the already wound web. , meaning that the protrusions/indentations of the web 12 engage the ribs of the web 14.
This results in a secure gripping connection between the webs 12, 14 and prevents play between the web rolls. Additionally, all uneven spots are smoothed out. In operation, the heat exchange wheel is subjected to axial stresses, which are generated by the air flowing past the heat exchange roll 10. The ability to absorb this stress is significantly improved by the wheels that press the windings firmly together according to the invention. During winding, the webs 12, 14 are further stretched by the braking action applied to the pressure rollers 56. Stretching the web means that the effect of the pressing and tensioning forces applied to the web by the pressure roller 56 are made permanent and remain in the finishing roll 10.

riveting the outermost winding of the wheel 10;
and/or the wheel 10 may be provided with an external ring to secure the wheel and maintain tension on the wheel during the winding operation.

Pressure roller 56 is shown in FIG.
It consists of a cylindrical body 58 which is rotatably mounted on the cylindrical body 58. The shaft 60 is detachably attached to the frame 62, but is attached so as not to rotate. The brake disc 64,
It is arranged so as to come into pressure contact with one of the end walls 66 of the cylindrical body. This is achieved by a bolt 70 provided with a projecting arm 68 and threaded into a thread 72 formed in the shaft 60, so that the brake shoe 74 of the brake disc 64 is pressed against the end wall 66 of the cylinder and presses against the pressure roller. exerts a braking action on 56. The brake disc 64 is provided with a flange extending into a groove 76 formed in the shaft 60 to prevent the brake disc 64 from rotating during braking. The pressure roller 56 is connected to the opposing weight 78 (second
This counterweight is suspended around a pulley 80 and attaches the pressure roller by a wire 82 attached to the frame 62 of the pressure roller. Wheels 84 are provided on the frame 62, and these wheels are connected to the wheels 10.
The frame 62 is arranged to run along a stand 86 that supports the frame 62 and controls the movement of the frame 62.

6 and 7 show the general appearance of the heat exchange roll 10 and the principle of its structure. 7th
The figure shows a portion of the roll 10. For simplicity, FIG. 7 does not take into account the curvature of the roll 10. FIG. 7 shows longitudinal ribs 88 on the web 14.
The web 12 has protrusions/projections that engage with the crests of the waves formed thereon and the bottoms of the grooves, respectively.
It clearly shows that the recessed portion 34 has been formed. As the webs 12, 14 are wound around the wheel 10, interengagement is provided between the protrusions/indentations 34 and the ribs 88. It is noted that the ribs 88 formed in the web 14 are sized such that the relationship between the width of the upper rib edge, the width of the lower rib edge, and the rib spacing across the web 14 is approximately 1:2:8. Should.

As can be seen in FIG. 7, during winding of the webs 12, 14, the wave crests 92 of the web 12 form a large portion of the roll relative to the groove bottoms 94 of the immediately adjacent roll of the web 12. It will be displaced. As the pressure roller 56 presses against each winding, the resulting deformation of the web 14 results in the web being corrugated in its longitudinal direction, as shown in FIG. This persistent elastic deformation of the web 14 causes the wheel 1
This ensures that the two webs are firmly joined together during zero operation, thus providing further protection against separation forces acting axially on the wheel 10.

Experiments conducted on heat exchange rolls made in accordance with the present invention have shown that proper selection of the pressure and braking forces exerted by pressure rollers 56 on webs 12, 14 during winding onto rolls 10 results in successful operation. The result is a roll 10 having properties such that it remains within the elasticity range/area when exposed to the deforming forces occurring during the process. If an angle α of 65° is selected for the waveform, a pressure of the order of 50 N and a braking force of 70 N will be generated on the wheel 10, resulting in satisfactory operating characteristics of this wheel.
Choosing a higher tensile force provides even improved handling characteristics and an expanded elastic range/area.

The roll 10 has a shaft 9 which acts as a winding core.
6. During the winding operation, this shaft is connected to a motor 98 connected to the shaft 96 via a gear mechanism 100.
Driven by The shaft 96 has an axially movable inner shaft 102 in the form of a sleeve;
Its outer end protrudes from the sleeve shaft 96 and has a threaded portion to which the outer relief disk 104 can be attached. inner shaft 10
2 is provided with a through hole or groove at its opposite end, into which the rod 106 is mounted, and this rod extends into the groove of the outer shaft 96. Rod body 106
The inner relief disk 108 is pressed against the roll 10 and this roll is rolled up when the disk 1 is wound.
04, 108, so that when the winding roll 10 reaches a predetermined size, these discs are fixedly arranged between the winding roll 10 and the roll 10 as the winding material is wound.
acts to release the inner windings of. Inner shaft 102 rotates together with sleeve-shaped shaft 96. This structure with an axially movable inner shaft 102 has relief discs 104, 108 relative to the shaft 96.
allows a certain degree of axial movement of the relief discs 104, 108, further increasing the fixing effect provided by the relief discs 104,108.

Although the present invention has been described above with reference to examples, the present invention is not limited to these examples, and various design changes can be made within the scope of the present invention. for example,
It is also possible to obtain the pressure for applying the pressure roller 56 to the wheel 10 not by the counterweight 70 but by hydraulic or pneumatic means.

[Brief explanation of drawings]

1 is a schematic side view of an apparatus according to the invention, FIG. 2 is a right side view of the apparatus of FIG. 1, and FIG. 3 is a partial side view of a pair of rollers forming part of the apparatus according to the invention; FIG. 4 shows the same roller pair shown in FIG.
5 is an enlarged cross-sectional view taken along the - line in FIG.
The figure is a schematic view of the heat exchange roll, and FIG. 7 is a detailed view of a part of the heat exchange roll showing the design principle. 10... Heat exchange roll, 12... First web,
14... Second web, 16, 18... Supply roll, 20... Pressure compensator, 22... Plate,
24... Roller station, 26, 28... Roller, 30, 32... Flange, 34... Projection/indentation, 36... Projection member, 38... Indentation, 40... Motor, 42... Pendulum , 44...
Wheel, 46... Turning wheel, 48... Pressure compensator, 50... Turning roller, 52... Second roller station, 54... Plate, 56...
Pressure roller, 57...bead, 58...cylindrical body,
60... shaft, 62... frame, 64... braking disk, 66... end wall section, 68... projecting arm, 70
... Bolt, 72 ... Screw, 74 ... Brake shoe, 76 ... Groove, 78 ... Weight, 80 ... Pulley, 82 ... Wire, 84 ... Wheel, 86 ...
...stand, 88...rib, 92...ridge top,
94... Groove bottom, 96... Shaft, 98... Motor,
100... Gear mechanism, 102... Shaft, 104...
Relief disk, 106... Rod body, 108... Relief disk.

Claims (1)

[Claims] 1. Two webs 1 wound in an overlapping relationship with each other.
2 and 14, one of the webs 12 being corrugated and forming transverse ridges and grooves, each of said webs having a wave ridge extending in the longitudinal direction of the web. and recesses and ribs 34, 88 having a depth smaller than the depth of the grooves, and both the ridges and grooves and the recesses and ribs are applied to the two webs 12, 14 by a roller; A method of manufacturing a heat exchange roll 10 in which a roller is arranged to engage each web while the web is being fed to a take-up station, the roller being positioned to engage each web while the web is being fed to a take-up station. A radial pressure is applied to press the indentation formed in said web into the engagement rib formed in the second web and to press the winding forming the wheel 10, A method for manufacturing a heat exchange roll, which comprises applying a braking force to a web having longitudinal ribs formed thereon while winding the webs 12, 14 around the roll 10. 2. The method for manufacturing a heat exchange roll according to claim 1, characterized in that a braking force is applied to the outermost wound of the web 14 on which longitudinal ribs are formed. 3. The first web 12 is designed to have a corrugated shape so as to provide the first web 12 with transverse ridges and grooves each having a protrusion/indentation 34 at the ridge top and groove bottom, respectively. a first station 24 for profile rolling the first web;
A second station 52 designed to impart longitudinal ribs 88 to the web 14 and the roll 1 are wound by winding the two webs 12, 14 in an overlapping relationship with each other.
1. An apparatus for carrying out the method for manufacturing a heat exchange roll according to claim 1, comprising: a winding station for forming two webs 12;
14 against each other and applying a braking action to the webs to apply tension in the longitudinal direction to the webs when these webs are wound around the roll 10 at the winding station. Device. 4. The means for pressing and braking the two webs 12, 14 against each other during the winding operation is a pressure roller 56 which is provided with a bead 57 and which is provided with longitudinal ribs 88 during the winding of said web. 4. The apparatus according to claim 3, wherein the apparatus is arranged so as to be in pressure contact with the web 14. 5. A pressure roller 56 with beads is attached to the web 1.
5. Apparatus according to claim 4, characterized in that it is connected to a weight 78 arranged to apply to said pressure roller the force necessary to press and brake 2, 24 together. 6. The first roller station 24, which imparts its shape to the corrugated web, consists of a pair of rollers 26, 28, which are provided with axial flanges 30, 3.
2, one of these rollers 26 is provided with a groove or recess 38, and a second roller 28 is provided.
The longitudinal protrusions/indentations are added to the corrugated web 1.
6. The device according to claim 3, further comprising a protruding member 36 for forming the device. 7. The roller pairs 26, 28 are driven by a motor 40, the motor being arranged to drive the roller pairs at a predetermined speed, and the pressure balancing pendulum means 42 being arranged after the roller station 24 in the direction of movement of the web 12. The web 12 is arranged to run on a wheel 44 attached to one arm of the pendulum 42, and the motor speed is adjusted by detecting the pendulum position and issuing a control signal to the motor 40. 7. The device according to claim 6, wherein said pendulum 42 is connected to said means. 8. The pressure roller 56 with beads is equipped with disc braking means 64 for braking the web 14 having longitudinal ribs while the web is being wound around the roll 10. The device according to any one of items 7 to 7. 9. The second roller station 52 is connected to a sensing means designed to emit a signal for controlling the speed of the motor 40 driving the first roller station 24. The device according to any one of items 3 to 8. 10 A sleeve-shaped shaft 96 is provided that acts as a core for winding the webs 12 and 14 around the roll 10, and an axially movable inner shaft 102 is mounted inside the sleeve-shaped shaft, and a forms a threaded end that can be extracted from the sleeve-like shaft 96 and has an outer relief disc 104 on this end.
Attach the inner relief disk 108 to the roll 10.
The roll 10 is fixed between two relief discs 104, 108 by connecting said inner shaft to means 106 arranged to press against said relief discs, said relief discs being connected by said axially movable inner shaft 102 to a sleeve-shaped shaft. The device according to any one of claims 3 to 9, characterized in that the device is movable in the axial direction relative to the base plate.