DE2357862A1 - VACUUM CYLINDER - Google Patents

Description

PATENT ADVOCATE

My sign

H 1412-14 / lyle

Please repeat in the answer

your message from 899 Lindau (Lake Constance)

RennerlelO P.O. Box 3130

13th Nov / ember 1973

lYlillard Francis Hayes _s jr _o

Hudson Street, UJarrensburg, iMetu York 12885 / USA

Vacuum cylinder

This invention relates to an vacuum cylinder composition for the device used in papermaking and in particular the cylinder design and function «*

The invention is developed as a cylinder development the circumference of which forms a paper web. Conventional idea one such shape contains a cylindrical wire mesh

509813/0695 - 2 -

or paper screen or a wire mesh outer surface by a pair of front rotor bodies arranged at a distance from one another and a number of them in between lying runners, some arched, at a distance Fasten mutually arranged support rods, ujobei a Ulicklungsdraht wound continuously on the support rods is to provide support for the exterior surface. The outer surface consists either of a single layer Wire mesh or a pair of layers are different Braid, the outermost being made of fine braid and the innermost being made of a coarser braid. In operation will Paper stock in the form of fibers incorporated into Uiassar on the appearance of the shape or roll on the surface fed at a speed which generally corresponds to the peripheral speed of the mold. The majority of the Fibers are held on the surface and define the Paper web, which the paper sheet then does "

Cylindrical shapes sometimes also have a perforated solid Casting outlined, with a cooperating mesh surface, which contains the circumferential surface of the roller, in such a way, that the need for supporting slider bodies and winding bars is eliminated. Suction boxes are conventional in the casting to apply the vacuum to the inner surface of the quadrant that is one cooperating crimping cylinder approaches. Or one

809813/0695 " ³ "

Suction is applied to one quadrant (which is submerged or covered by the forming paper web) while another adjacent sealed quadrant is exposed to air a slurry of the fibers entraining water is immersed and tuird "hence the turbulence exposed to the paper web formation to fatal interfere _s and the further disadvantage comes from the increased damaging effects of the centrifugal force which is of the current flowing from the magnitude of the charges through the perforations of the casting The discharge originates, the charges comprising forces considerably higher than any forces involved, when the usual small droplets flow through the conventional wire mesh This invention differs of which by providing a soft roof »

The disadvantages of immersion and the centrifugal forces generated were partially offset by the application of suction to the interior of the surface, thereby creating a greater ' Pressure gradient with its tendency to build up) to remove more water and thus allow faster formation · This was achieved by the technique of sealing the end faces of the roll and thereby creating a vacuum through a tube

509813/0695

suck that with one of the gaskets in the face Connection. But it is greasy, by one such a system has a satisfactory degree of vacuum especially with such a large part of the cylinder shape exposed to the atmosphere.

On the contrary, this invention can be considered as an constructive one Form can be used in which the material is a quadrant of the cylinder through an adjacent channel or Passage is supplied, u / elcher of gradually decreasing Size is to give the accelerating effect and include a suitable sealing arrangement around the surface area to restrict. The speed of the flow of material when it reaches the surface is accelerated so that that its speed is about the same as the peripheral speed of the cylinder when the material runs out. To achieve this, the material is directed substantially tangentially to the roller via the channel or passage.

The invention is also applicable, for example, for use as suction rollers that are at various locations in the papermaking device can be used. As an example it can be used as a suction squeeze cylinder or knot catcher by means of which the formed paper web is transferred, followed by flowing along the forming Wire onto the felt, where the applied suction continues

509813/0695

Ulasser removed from the paper web and the fibers further contracts so that the transfer of the paper web can be carried out at high speed.

It is conceivable that their cylinder can be fastened on pegs, with a pressure gradient arranged at the highest - box and supporting face seals and mud flaps and check valve against vacuum under the squeeze cylinder or receiving area.

The invention avoids the disadvantages of the prior art, which accompany the suction of a vacuum on a roll. It does it with the formation of the braid surface that comes with one Vacuum works together on part of the surface area, over a number of so-called air / water compartments in Connection with a hollow central core.

The Air / UJasser fans and the central core are everyone stationary and a pair of spaced apart, opposite, circumferentially extending end face rings and a number of axially spaced apart rings therebetween define an arrangement on which a number of transversely extending foils are attached, on the outer grooved ones Edges a winding wire is wound on which a Wire mesh surface is attached, with the rings that

- 6 509813/0695

Foils, the winding wire and the surface in harmony as an outer sub-assembly relative to / to the central core and its dividing walls and water fans or -Shovels are rotatable, which cooperate with the water collector define and which will work as the inner subassembly.

The two sub-assemblies, one rotatable relative to the other, serve to represent a "squirrel cage" construction, with the wire mesh of the outer surface wrapped on what is defined as an open or soft roof, instead of being wrapped on a perforated tray and there is a considerable gap between the outer surface or the Strainer and the area where the excess drain will be collected. The inclination that the UJasser up to that Taking molding area is rendered ineffective as the central core is not rotatable; and the overflow trapped in it is prevented from moving outward through the screen.

The stationary central core is provided with an elongated, arched slot that extends from its outer Circumferential area over its inner chamber through most of the Roll width from side to side and a little over an angle extends over 90 to define a so-called open core quadrant, which is relative / to the upper,

509813/0695

rising quadrant of the assembly is fixed when it is in operation.

The entire area of the elongated core hole is by means of a series of partition walls which are arranged obliquely at a distance from one another divided into a number of smaller areas, with the partitions transverse to the core together with and something Extend over the width of the core elongated hole, thereby to the respective one of the oppositely arranged partition rings to be attached, which are attached to the core next to the opposite sides of the elongated hole and themselves extend radially outward therefrom.

The total area of the elongated core hole, which is divided into smaller areas, each arranged in an axis perpendicular to the assembly is also divided into a number of UJasser-collecting Areas divided, as by the spaces between adjacent pairs of circumferential intermediate rings of the outer rotatable subassembly defines which rings are past the core slot and next to the pairs of corresponding ones curved water fans or blades that rotate span the core elongated hole, such a Ulasserfach or such a wing are arranged radially inward of each circumferential intermediate ring.

The transverse partitions and the curved sections

- a 50 9 813/0 6 95

the Uiasserfächer work with the neighboring parts of the Intermediate rings together when they move over the quadrant represented by the elongated core hole to one Define the number of closely adjacent air / ventilator collectors, through which air and outflow from the roller circumference to the Core interior flows.

In the drawings shows:

Figure 1 is a fragmentary cross-sectional view of the cylinder construction ;

Figure 2 is a sectional view taken along line 2-2 of Figure 1;

Figure 3 is an enlarged sectional view taken along line 3-3 of Fig. 2; and

Figure 4 is an enlarged sectional view taken along line 4-4 of Fig. 1.

The cylinder assembly includes a paper screen or outer surface 10 in the form of a closely spaced mesh small diameter wires arranged in relation to one another defining openings through which the effluent can flow, such an area typically having a mesh size of between 50 and 80 (wires per inch) to be porous

509813/0695 ⁹ "

cylindrical clothing for the cylinder or the role too form for the support of a mat made of paper fibers, which is placed on it and is in the direction of the rolls— rotation moves. The braid is made directly or with a coarser flat layer in between using a winding wire 12 supports the circumference around the cylinder and on a number of spaced apart and transversely arranged supporting foils 14 is wound, which in turn through a pair of end faces arranged at a distance from one another Rings 16 are supported, the supporting Films have opposite ends each at the adjacent end-face ring 16 is attached and in addition at each of a number of uon axially spaced from one another arranged, intermediate rings 18 attached are.

The front rings are each at 20 on one next to it arranged annular cover flange 22 suitably screwed.

In the case of conventional cylinders, the device also comprises a UJeIIe ₁ on which rotor bodies are mounted, the wells with the rotor bodies and the outer surface being rotated.

In this invention, in contrast to rotating the Wave with the rings and the outer surface of the rings themselves

509813/0695 - 10 -

rotatable on a central stationary, hollow cylindrical Core 30 attached.

At each end of the core 3D is one of the cover flanges 22 attached above, each cover flange having a radially outwardly projecting part 32 in the right U / angle, that of the outer surface of the adjacent end-face ring faces and is suitably screwed and further relative to the core or its extensions by a Number of bearings 33 is supported, which are arranged around the outer circumference of the cover flange and relatively to sit by means of an outer annular enclosing collar 34 which supports the cylinder with a Stand 36 related.

The wall of the core 30 is provided with an elongated curved through slot 40 which extends over the Most of the width of the cylinder extends side to side and at an angle a little over 90 ° to what is called a define open core quadrant, which is stationary relative to the upper ascending quadrant of the assembly is arranged.

above the core elongated hole and between its frontal Extending walls lie a number of spaced apart curved, triangular water fans

- 11 509813/0695

or wings 60, such a glass compartment being radially inwardly extending is arranged to with a respective intervening, radially outwardly extending Ring 18 to be aligned, the Ulinkelanordnung the Walls of the Ulasser fans or wings channel-like projections provides, along which the outflow, into the cylinder through the outer surface and between the foils and rings running UJasser is distracted.

The entire area covered by the elongated core hole is divided into three smaller ones arranged at the same distance from one another Areas where identical dimensions are provided by a series of diagonally spaced partitions 42, 44, 46 and 48 divided, which extend across and roughly across extend the same distance with the core elongated hole, each at its respective ends rigidly to an adjacent, is attached to the circumferential partition ring, which is attached to the core immediately next to a respective side of the core - elongated holes 40 is attached and extends radially outward.

The partitions each extend outwardly towards the supporting sheets 14, but at a short distance from the circumferential arrangement of the same, and each and every land is on theirs outer end is provided with a flattened grinding arm 52 suitably attached thereto by a screw 54.

509813/0695

The outermost part of each grinding arm is suitable with one Notch 56 provided to accommodate the passage of the corresponding intermediate ring when the outer Assembly is rotated relative to the inner assembly.

It is noted that the supporting sheets 14 are each in cross-section are generally teardrop-shaped, with their leading Side is angled slightly inward in the direction of rotation b to produce an inward pumping effect and the upper trailing angle has a downward sloping shape which serves to create a slight vacuum, which supports a larger drain.

The advantage of this supporting sheet over the typical round bars of the known structures that usually 9.5 mm (3/8) in diameter is that when the cylinder rotates at high peripheral speed, any wastewater moving past or through the paper screen is likely to fall onto the bars. When the water hits the leading side of the round bar above its horizontal center line, the forces lean due to the speed tends to pull the water tangentially or even upwards. In contrast, the Film of the present invention has reduced the objectionable area by reducing it to a radius on the order of magnitude from about 1.59 mm (1/16 inch) to a minimum

- 13 -

509813/0695

has been reduced. The conductive surface with the straight side is also angled in such a way that the after to set up the inside thrusting effect almost as a noiseless fan. In addition, the upper rear surface is as a sheet formed to create a vacuum that allows the waterer to go back and forth without resistance drops.

The curved portion or quadrant of the roller circumference between the partitions 42 and 48 is thus divided into three parts. The first part is that to which the paper stock is fed directly via the channel or throat and in which the initial drainage takes place; the second part is the part directly in front of the entry segment of the paper stock and in which the second drainage takes place; and the third part is a part before the second segment which is exposed only to the air _e

Substantially the entire axial extent of the front surface serves for the openings through the air / vent fans are defined.

The cylinder machine works with a not shown Barrel in which the cylinder is rotatably mounted and to which the paper stock is fed to form the Paper web on the outer surface 10, with the opposite

509813/0695

End faces of the cylinder are sealed against leakage with respect to the barrel, for example by a holding Dachshund holding a seal between each end face Includes rotor body and the core.

The end portions of the core 30 are each connected to a connector having outlet ports which are connected to a suitable conduit. A set of openings, each with the S _a ugseite an air pump or a blower connected, which is capable of providing a sufficient negative pressure by pumping air thereof so that an additional pressure drop on the order of about 254 to 635 mm (10 to 25 inches) of water is provided on the order surface to thereby add a hydraulic pressure differential of about 152 to 178 mm (6 to 7 inches) of water, as is normally used in a cylinder molding machine to both To stimulate water as well as air to flow into the central chamber of the core and then direct it outwardly into an appropriate sewer by a suitable ejection arrangement. The air will naturally flow through the openings provided to the suction side of the pump.

Additional concentrated stock is added to the wastewater discharged into the sewer, so that the combination of Abuiasssrausstoß and added

- 15 -

509813/0695

Paper stock the output of the collector in a reasonable We will return paper stock for the renewed Feed to the container.

A pump is required to provide the appropriate hydraulic To deliver pressure gradient and to push the paper stock into the constriction next to the cylinder.

The paper web formed is placed on a felt as usual transmitted, which touches and drives a squeeze cylinder won conventional design. Because the felt in contact with the cylinder, the cylinder is driven in the same direction ujie the felt to transfer the paper web from the outer surface to the felt.

These components are not shown or described further, u / eil they are of traditional and well-known form and effect are. It becomes apparent, however, that the paper stock is too a part of the circumference of the outer surface, which is of less circumferential extent than the distance between the wall parts of the UJassersammlera. As a result, just do Moisture from the formed paper web and air drawn out through the front surface of that portion of that paper web. This tends to tighten the fibers as well as the moisture content so that the paper web is more easily transferred to the felt at high speed.

- 16 509813/0695

Although the cylinder through the felt and the squeeze cylinder is driven, it becomes apparent that the cylinder could be driven directly, u / ie for example by You can see it with a flange, on the cover a gearwheel could be attached via a conventional drive arrangement is driven.

Claims

- 17 -

509813/0695

Claims (5)

Claims ( i.jDevice containing a suction roll for use in papermaking, indicated by an elongated stationary core (30) having a central Has chamber and forms an axis for the roller, a pair of rings (16) ″ and a number of rings (18) arranged axially between them around the core (30), a number υοη arranged transversely at a distance supporting foils (14), which are received by the rings (18), a UJicklungsdraht (12), around the supporting foils (14) is wound, a wire mesh outer surface (10), the is attached to the liner wire (12), wherein the rings (16, 18) and the supporting foils (14) and the winding wire (12) and the wire mesh outer surface (10) define a rotatable subassembly that is relatively is rotatable to the core (30), a pair of end cover flanges (22), dia next to the opposite end faces of the rotatable subassembly are arranged and fasten the respective adjacent end-face rings (16), a bearing arrangement (33) to the bearing of the frontal deck flanges (22) relative to the core (30), the core (30) having an elongated hole (40) which extends through - 18 - 509813/0 6 95 -1R- the core wall to / ischen the front cover flanges (22) extends in a side-to-side direction and through a UJwinkel uon substantially 90 in a front side direction on the front side in the core innars, a number of spaced apart partition walls (42, 44, 46, 48) which extend from the core elongated hole extend outside and across it, a number υοη spaced apart curved U-water compartments (60), which over the core elongated hole in directions are arranged at right angles to the partition walls to cooperate with the partition walls a number υοη air and UJ water collectors to define who are each next to the inner surface of the outer surface (10) to a respective part of the core elongated hole (40) extend into the central Chamber of the core leads. 2. suction roller according to claim 1, characterized by an arrangement which is connected to the central chamber of the Kernes is connected to pumping υοη air and water from it, as it is drawn in through the outer surface (10). 3. l / vacuum cylinder assembly, labeled .by a continuous outer subassembly containing a circular sieve (10), which on a number υοη in the distance each other arranged on the circumference, fastened on rings - 19 509813/0695 Support films (14) is added, a stationary inner subassembly (30) concentrically received in sockets in the outer subassembly and includes a hollow cylinder having a continuous arcuate slot (40) extending transversely through substantially extends the entire width of the outer subassembly and circumferentially through an angle which is substantially 90 °, an outwardly protruding, walled passage (42), which is attached to the cylinder on the circumference next to the elongated hole and acts as a snout from the cylinder circumference extends to next to the foils (14) of the outer subassembly, a drive assembly for rotating the outer subassembly relative to the inner subassembly for opposition a constantly changing part of the circumference of the sieve with the snout of the passage and a suction arrangement in the hollow part of the cylinder for Exerting a pulling effort on the screen with the sub-assemblies cooperatively arranged, to draw effluent through the sieve via the passage into the hollow part of the cylinder. 4. Device that has a suction roll for use in papermaking contains, characterized by a stationary hollow core (30), - 20 - 50 9 8 13/0695 a pair of face rings (16). and a number of axially spaced apart, intermediate rings (18) which are attached to the circumference around the core (30) are) a number of transversely spaced apart supporting foils (14) received by the rings, a wrapping wire (12) wrapping around the supporting foils is wrapped, a wire mesh - outer surface (10), which on the UlitkLungs- wire (12) is attached, the rings and the supporting foils and the winding wire and the wire mesh outer surface is a subassembly define, which is rotatable relative to the core (30), a pair of end-face rotating flanges (22) adjacent to the opposite end faces of the rotatable subassembly is arranged and the respective adjacent end faces Ring (16) of the pair attached, a bearing arrangement (33) for bearing the end cover flanges (22) relative to the core (30), wherein the core (30) has an elongated hole (40) which extends through the core wall between the end cover flanges (22) extends in a side-to-side direction and over an angle of substantially 90 ° in a front side direction to the front, a number of spaced apart partitions (42, 44, 46, 48) extending from the core elongated hole and 509813/0695 - 21 - extend transversely to the outside, a number of curved ones arranged at a distance from one another U-water compartments (6G), which are placed over the core elongated hole (40) in Directions in the right leg to the dividing walls are, in cooperation with the partition walls, to define a number of air and water collectors, each of which is located where the adjacent inner surface of the outer surface to a respective part of the core elongated hole, which is to the hollow part of the core leads. 5. Vacuum cylinder assembly, characterized by a continuous outer subassembly consisting of a circular screen (10) spaced apart by a number arranged on the circumference, fixed on rings supporting Foils (14) is added, a stationary inner subassembly that is received concentrically within the outer subassembly in sockets and consists of a hollow cylinder having a curved through elongated hole that extends in the transverse direction essentially along the entire width of the outer sub- assembly and on the circumference by a Ufinkel uon essentially 90 ° extends,. · an outwardly protruding, walled passage on the circumference next to the elongated hole, which turns out to be a snout from the cylinder circumference to next to the foils of the outer one - 22 509813/0695 Subassembly extends, Land elements (42, 44, 46, 48) for dividing the passage lattice-like U / ice in a number of sub-passages, a drive arrangement for rotating the outer subassembly relative to / to the inner subassembly for the opposite side a constantly changing part of the circumference of the sieve with the mouth of the passage and an arrangement in the hollow part of the cylinder for exercising an exhausting effort on the sieve in drawing a discharge through the sieve via the sub-passages into the hollow part of the cylinder. 509813/0695 Blank page