DE102004025778A1 - shoe roll - Google Patents

Abstract

The rotary drive (14) is designed to compensate for, or to tolerate axial movements of the casing (12). The roller is turned by the drive acting on clamping discs (16) on both edges of the casing. The casing can be displaced axially by the discs, through about +- 50 mm. The discs are driven externally or internally. The rotary drive (14) comprises motors (18) on both the driving- and driven sides. It comprises one or more electric motors, stub shafts, couplings (20) and/or splined shafts (22). Further details of the drive and coupling arrangements are elaborated.

Description

The The invention relates to a shoe roll for the production and / or treatment a material web, in particular for a calender, with an axial removable jacket and a drive for the rotation of the jacket.

A such shoe roll can, for example, with a particular overhead Heating roller interact, and while normal operation, the shoe roll shell then, for example only by the hot Counter roll to be driven. But now it must not be one direct contact between the shoe roll shell and the heating roller come. Between these always the respective material or paper web must lie, otherwise the shoe roll shell would be too hot. Corresponding A drive is required to move the shoe roller to speed to accelerate the heated counter roll.

One Another problem is the wear of the shoe roll shell. Such a wear could be possibly by a repeated axial displacement of the shell oppose. After the shoe roll shell driven or initially on the paper speed has to be accelerated, however, this is not readily possible.

Of the Invention is based on the object, an improved shoe roll of the type mentioned above, in which the aforementioned Problems are eliminated.

These Task is inventively characterized solved, that the rotary drive is designed so that it has a respective axial movement of the shell compensates or tolerates.

there the jacket is preferred at its two edges over clamping disks stored, being over the rotational drive the clamping disks are driven. The coat is over in an advantageous way the clamping discs also axially displaceable.

The Shoe roll, for example, be designed so that the coat to about ± 50 mm is axially displaceable.

The Clamping discs can from the outside and / or be drivable from the inside.

at a preferred practical embodiment of the shoe roll according to the invention includes the rotary drive both on the driver's side and on the Drive side in each case at least one electric drive motor.

Except at least an electric drive motor, the rotary drive, for example, at least a PTO, at least one clutch and / or at least one Include splined shaft.

Conveniently, the rotary drive comprises at least two electric drive motors whose Drive shafts torque-locking connected to each other.

there can the drive shaft, for example via a propeller shaft with Metallbalgkupplungen be mechanically interconnected.

Prefers sits on a respective drive shaft in each case a disc-shaped electrical Drive motor.

are provided two electric drive motors, so they can over appropriate Sensors and a corresponding scheme, for example, also after work according to the master / slave principle.

Prefers is a respective electric drive motor provided with a cooling. This can be the cooling for example with fluid, gas (air), water and preferably with oil, because at a respective leakage oil is not contaminated in the mantle.

at a preferred practical embodiment of the shoe roll according to the invention is in the roll inside the clamping disks each one as a ring gear executed Provided gear in which a flying pinion engages. These Pinion can each be stored in a movable support. A respective one carrier on the one hand on a non-rotating part of the respective clamping device for the Sheath attached and on the other hand be guided in a support body.

The Pinion can each sitting on a pinion shaft, which slidably via a spline with a respective, in a support body coupled intermediate shaft is coupled. The intermediate waves can each have a Metal bellows coupling coupled to the respective drive shaft be.

The position of the teeth of the internally toothed cavity should preferably not change relative to those of the pinion teeth in order to avoid wear and damage to the teeth. Possible cause for a change in position is a wobbling movement of the clamping disks and / or a respective deflection of the pinion shaft len.

to solution This problem is inventively a respective pinion shaft firmly on the bearing sleeve stored on which the respective clamping sleeve is mounted. A tumbling motion is thus excluded. It can For example, be provided two bearing points in the axial direction, For example, two deep groove ball bearings side by side, which are axially biased are to get the game to a legal limit Measure too to reduce. With the appropriate game is also a respective Tumbling motion avoided.

Between a respective pinion shaft and the respective drive shaft a universal joint can be provided.

From Advantage is in particular a spherical toothing of pinion and / or gear.

to cooling the electric drive motors can in the stator of a respective Drive motor an air pressure prevail, this pressure is preferably slightly higher as the roll internal pressure.

Prefers is the coat relative a fixed support body the roller radially adjustable, so there is a so-called inner hub. The nip can thus by lifting or lowering the Shoe closed or opened become. In the open Condition becomes lubricating oil the coat no longer stripped in the desired manner, causing damage to lead can. It can therefore in the circumferential direction before and / or behind a press shoe, preferably in at least one upper quadrant the roller, a Ölabstreifleiste be provided. This oil scraper is then advantageously formed with a counter element open Nip to the coat pressed.

Prefers is an oil cistern provided, in which the stripped oil passes by gravity and over the this oil is traceable to the cooling oil circuit.

to Adjustment of different radial jacket positions relative to a fixed support body is according to one Another aspect of the invention at least one acting on the jacket Provided pressing element with a shim.

According to one Another aspect of the invention, the jacket over two perpendicular to the circumferential direction arranged contact pressure rows can be acted upon. There are these two rows of contact elements preferably separated from each other pressurizable.

From Advantage is also especially if on the driver and the drive side respectively at least the four outermost ones Pressing elements can be acted upon individually with different pressures.

The Invention will be described below with reference to exemplary embodiments with reference closer to the drawing explains; in this show:

1 a schematic, partially sectioned view of an exemplary embodiment of a shoe roll,

2 a modification of the embodiment according to 1 with a double universal joint between a respective pinion shaft and a respective drive shaft,

3 one with the 1 comparable representation of a shoe roll with a crowned toothing between gear and pinion,

4 a schematic cross-sectional view of a shoe roll with an attachable to the roll shell Ölabstreifleiste and

5 a schematic representation of a cooled electric drive motor.

1 shows a schematic, partially sectional view of an exemplary embodiment of a shoe roll 10 for the production and / or treatment of a material web, which may in particular be a paper or board web. The shoe roll 10 may be determined in particular for a calender and work together with a particular overhead heating roller.

The shoe roll 10 has an axially displaceable jacket 12 , which may be, for example, a so-called "Qualiflex" coat. The coat 12 So it is so flexible that it can adapt to the shape of a counter or heat roller to form, for example, an extended press nip for smoothing a paper or board web with the heated backing roll.

As based on the 1 It can be seen, is the shoe roll 10 with a drive 14 for the rotation of the mantle 12 Mistake. Here is this rotary drive 14 designed such that it has a respective axial movement of the shell 12 compensates or tolerates.

At its two edges is the coat 12 over clamping disks 16 stored. These are over the rotary drive these clamping discs 16 at drivable. In addition, the coat 12 over the clamping disks 16 axially displaceable.

In the present case, the clamping discs 16 drivable from the inside. Alternatively or additionally, however, a drive from the outside is conceivable.

As based on the 1 can be seen, includes the rotary drive 14 in the illustrated embodiment, both on the driver side and on the drive side in each case an electric drive motor 18 , Except at least one electric drive motor 18 can the rotary drive 14 For example, at least one PTO, at least one clutch 20 and / or at least one in particular axially displaceable splined shaft 22 include.

The drive shafts 24 the two electric drive motors 18 the rotary drive 14 can be connected to each other torque-locking. It can drive shafts 24 for example via a propeller shaft 26 with eg metal bellows couplings 20 be mechanically interconnected.

The on a respective drive shaft 24 seated electric drive motors 18 can have a disc-shaped shape.

Inside the roll is at the clamping discs 16 each designed as a ring gear 28 provided, in which a flying pinion 30 intervenes. Here are the pinions 30 each stored in a movable support. A respective carrier can on the one hand on a non-rotating part of the respective clamping device for the jacket 12 attached and on the other hand in a support body 32 be guided. The pinions 30 each sit on a pinion shaft 34 , which is slidable via a spline with a respective, in a supporting body 32 stored intermediate shaft 36 is coupled. The intermediate waves 36 are each about as a metal bellows coupling 20 with the relevant drive shaft 24 coupled.

A respective pinion shaft 34 is firmly on the bearing sleeve 38 stored, on the synonymous the clamping sleeve 16 is stored.

In the 1 are also the journals 40 the shoe roll 10 to recognize.

The storage of the clamping disks 16 and the pinion shafts 34 is in 1 With " 60 " respectively. " 62 "stated.

2 shows a modification of the embodiment according to 1 in which between a respective pinion shaft 34 and the respective drive shaft 24 a preferably double universal joint 42 is provided. Such a universal joint 42 compensates for any wobbling movements of the clamping or end discs 16 , Incidentally, the embodiment according to 2 at least essentially the same structure as the one of the 1 have. Corresponding parts are assigned the same reference numerals.

3 shows one with the 1 comparable partial representation of a shoe roll 10 with a crowned toothing between pinion 30 and gear 28 , As can be seen from the two sections AA and BB, have the teeth 44 of the pinion 30 in section through the axial center of the pinion 30 (Section BB-) has a greater thickness than in the axially outer region (section AA). Such spherical toothing is particularly advantageous if the angle between the respective pinion shaft 34 and the roller axis is not equal to zero.

4 shows a schematic cross-sectional view of a shoe roll 10 with a to the roll shell 12 Pressable oil scraper bar 46 , Such a Ölabstreifleiste 46 can in the circumferential direction in particular before and / or behind a press shoe 50 , preferably in at least one upper quadrant of the roller. It is with the nip open, which is formed with a counter-roller such as a heat roller to the coat 12 be pressed.

As based on the 4 can also be seen, an oil pan 48 or -rinne be provided, in which the stripped oil passes by gravity and over which this oil is traceable into the cooling oil circuit.

In the 4 is again the supporting body 32 and a journal 40 the roller 10 to recognize. The to the inside of the coat 12 Applicable oil scraper 46 is in the present case, for example, radially movable. Between this oil scraper 46 and the oil cistern 48 can be a baffle 52 be provided for the stripped oil.

5 shows a schematic representation of a cooled electric drive motor 18 , in whose stator an air pressure p1 prevails, this pressure preferably being slightly higher than the internal cylinder pressure p0. The seal can for example via a shaft seal 54 or the like. There is also an enema 56 as well as an outlet 58 to recognize for cooling.

With the shoe roll according to the invention, inter alia, the problem is solved that a drive is required to accelerate the shoe roll to the speed of the backing roll, the roll shell while the hot counter roll However, do not touch directly. In order to counteract this problem, provision is made inter alia to drive the tensioning disks, wherein a drive from the outside and / or from the inside is possible. In addition, the roll shell is moved axially to counteract premature wear. For this purpose, the drive must be axially variable, for which purpose, in addition to an electric drive motor on the driver's side and the drive side, for example, at least one PTO, at least one clutch and / or at least one splined shaft can be provided. The provided on the driver and drive side drive shafts can be connected to each other torque-locking. Basically, by appropriate sensors and a corresponding control but also a master / slave operation of the engine conceivable. The use of two motors ensures the required redundancy.

The Engines can with a cooling Be provided with the cooling for example by a fluid, gas (air), water and preferably with oil takes place because in a respective leakage oil in the jacket is not contaminated becomes.

The Position of the teeth of the internally toothed ring gear should be relative to the teeth of the Ritzels as possible Don `t change, to wear or a damage the teeth to avoid. A possible Cause for a respective change in position are wobbling movements of the clamping disks and / or a respective Deflection of the pinion shafts.

To counteract this problem, a fixed bearing of the pinion shaft is provided on the bearing sleeve, on which the respective clamping disk is mounted, so that tumbling movements are excluded. In this case, for example, two bearing points in the axial direction are conceivable, for example, two deep groove ball bearings next to each other, which are axially biased to reduce the game to an acceptable level (see, for example 1 ). For example, a corresponding game can cause a tumbling motion.

Conceivable is in particular a firm storage of the pinion on the respective Clamping disc and the use of a universal joint in the pinion shaft. It is also useful a spherical toothing of pinion and / or ring gear.

The shoe whales can be provided with a so-called inner hub. By raising or lowering the press shoe, the nip can thus be opened or closed. When the nip is open, however, the lubricating oil of the jacket is no longer reliably removed, which can lead to damage. As a result, an oil scraper bar may be provided in front of and / or behind the shoe, preferably in the upper two quadrants. The oil scraper bar can be pressed on and is applied with the nip open. The stripped oil runs due to gravity in an oil sump and is there returned to the cooling oil circuit (see. 4 ).

The Paper web is between an overhead heating roller and the bottom Shoe roll performed with rotating press cover.

The Shoe roll can be displaced hydraulically in the vertical direction be. The heating roller is preferably installed stationary. To produce a pressing pressure, the shoe roll is first turned against the heating roller.

there either the shoe roll is raised until the heating roller and the sheath of the shoe roll just touch, or the shoe roll becomes raised until the outside diameter overlap the heating roller and the undeformed sheath. It dives the jacket in the outer diameter the heating roller and is deformed.

Around can realize these two shoe roll positions can the pressure shoe height with shims screwed to the shoe underside respectively be adjusted.

Of the necessary Pressing pressure is achieved by, for example, hydraulic pressure elements applied, which press the shoe against the heating roller.

These Pressing elements can arranged for example in two rows perpendicular to the paper direction be. You can be pressurized separately from each other. By different pressures in the two rows then the driving point of the resulting Pressure force to be moved in the paper direction. Out of such Shifting results in a change of the printing profile in the paper direction. The pressure in the two Rows can be varied by, for example, ± 25%.

At the Paper web edge on the leader and the drive side can at least the four outermost ones Pressing elements are acted upon individually with different pressures.

The Shoe roll can be used with pressure shoes with a press zone length between For example, be equipped 130 mm and 250 mm, for example.

With a special device, the pressure shoe without a removal the shoe roll to be changed. For this purpose, the shoe roll, for example about 300 mm away from the heating roller.

Of the Press cover must not come into direct contact with the heating roller, because the cladding material is the surface temperature the heating roller would not withstand. Therefore, the press nip only be closed when a paper web in the press nip located. To the edge area with fluctuating width of the paper web can prevent contact between heat roller and press cover, can here a Teflon belt revolving at paper speed or the like be installed, its position via a web edge sensor and an adjustable carrying frame the paper web edge is readjusted. In addition, the press cover be cooled in the edge area with a water / air mixture.

At the Shut down the press nip with already carried paper web must be Turn the press cover at the speed of the paper web. Therefore the press cover must be open when the press nip is open be accelerated. The necessary drive is located preferably in the interior of the shoe roll. To the rotating clamping disks, the on the leader and on the drive side receive the ends of the press cover, is in the interior of the roller one Gear attached. This gear is preferably designed as a ring gear, in which engages a cantilevered pinion. The pinion will open the leader- and the drive side are each mounted in a displaceable carrier, on the one hand on a non-rotating part of the respective clamping device for the press cover attached and on the other hand guided in the support body. The pinion shafts can open the leader and the drive side each over a spline displaced with one on the leader or Drive side in the support body coupled coupled intermediate shaft.

With this arrangement it is possible the press jacket in operation by, for example, ± 50 mm in the cross machine direction to adjust, to prevent punctual wear of the press jacket. The adjustment can be weekly, for example, for example 10 mm.

The Intermediate waves can each with one on the driver's or drive side existing metal bellows with the two drive shafts be coupled. On each of these two drive shafts is expediently a disc-shaped Electric motor attached. The two drive shafts can have one PTO shaft with e.g. Metal bellows couplings mechanically with each other be connected. In this case, the two clamping disks, which receive the rotating press cover, mechanically together connected. The two electric motors are preferably cooled with oil inside. All electrical Cables can be led out of the roller through the bearing pin on the drive side. All Shaft bearings and the gears on the driver and drive side can each have one Nozzle per lubrication point with pressure oil be supplied.

In the case the failure of the drives inside the roller can be an external one Drive retrofitted be on the drive side over a shaft through a bearing block and a clamping device in the Gear of the clamping washer engages.

Around When accelerating the roller with open press nip the cooling oil drain to ensure, can inside the roller before entering the pressure shoe a nearly pressure shoe width stripping bar can be installed. Such Bar can, for example, pneumatically against the inside of the Pressed jacket pressed be stripped, whereby the entrained by the press cover oil and can flow directly into the machine-wide oil drain pan.

• – verschiedene Achsabstände zwischen Schuhwalze und Heizwalze durch veränderte Druckschuhhöhe
• – variables Druckprofil in Papierlaufrichtung durch ungleiche Anpressdruckverteilung
• – variable Anpressdruckverteilung im Randbereich der Papierbahn
• – variables Druckprofil durch Einsatz von Druckschuhen mit verschiedenen Presszonenlängen
• – schneller Druckschuhwechsel ohne Ausbau der Schuhwalze
• – Beschleunigung des Pressmantels durch einen ihm eigenen Antrieb im Innern der Schuhwalze
• – Verstellung des angetriebenen Pressmantels in Maschinenquerrichtung zur Vorbeugung von punktuellem Verschleiß
• – sichere Ölabfuhr durch pneumatisch anstellbare Abstreifleiste.

Among the advantages of the shoe roll according to the invention include:

• - Different center distances between shoe roller and heat roller by changing pressure shoe height
• - Variable pressure profile in paper direction through unequal contact pressure distribution
• - Variable contact pressure distribution in the edge region of the paper web
• - Variable pressure profile through the use of pressure shoes with different press zone lengths
• - Quick pressure shoe change without removing the shoe roll
• - Acceleration of the press jacket by its own drive inside the shoe roll
• - Adjustment of the driven press jacket in the cross machine direction for the prevention of punctual wear
• - Safe oil removal by pneumatically adjustable squeegee.

10

shoe roll

12

coat

14

rotary drive

16

clamping shoe

18

electrical drive motor

20

clutch

22

Splined shaft

24

drive shaft

26

propeller shaft

28

gear

30

pinion

32

supporting body

34

pinion shaft

36

intermediate shaft

38

bearing sleeve

40

pivot

42

universal joint

44

tooth

46

Ölabstreifleiste

48

Oil sump, -rinne

50

press shoe

52

baffle

54

seal

56

enema

58

outlet

Claims (31)

Shoe roll ( 10 ) for producing and / or treating a material web, in particular for a calender, with an axially displaceable jacket ( 12 ) and a drive ( 14 ) for the rotation of the shell ( 12 ), characterized in that the rotary drive ( 14 ) is configured so that it compensates for or tolerates a respective axial movement of the shell. Shoe roll according to claim 1, characterized in that the sheath ( 12 ) at its two edges via clamping disks ( 16 ) is mounted and that on the rotary drive the clamping discs ( 16 ) are drivable. Shoe roll according to claim 2, characterized in that the sheath ( 12 ) over the clamping disks ( 16 ) is axially displaceable. Shoe roll according to one of the preceding claims, characterized in that the sheath ( 12 ) is axially displaceable by about ± 50 mm. Shoe roll according to one of the preceding claims, characterized in that the clamping discs ( 16 ) are drivable from the outside. Shoe roll according to one of the preceding claims, characterized in that the clamping discs ( 16 ) are drivable from the inside. Shoe roll according to one of the preceding claims, characterized in that the rotary drive ( 14 ) both on the guide side and on the carrier side in each case at least one electric drive motor ( 18 ). Shoe roll according to one of the preceding claims, characterized in that the rotary drive ( 14 ) except at least one electric drive motor at least one PTO shaft, at least one clutch ( 20 ) and / or at least one splined shaft ( 22 ). Shoe roll according to one of the preceding claims, characterized in that the rotary drive ( 14 ) comprises at least two electric drive motors whose drive shafts ( 24 ) are connected to each other torque-locking. Shoe roll according to claim 9, characterized in that the drive shafts ( 24 ) via a propeller shaft ( 26 ) are mechanically interconnected with Metallbalgkupplungen. Shoe roll according to one of the preceding claims, characterized in that on a respective drive shaft ( 24 ) a respective disk-shaped electric drive motor ( 18 ) sits. Shoe roll according to one of the preceding claims, characterized in that the rotary drive ( 14 ) at least two electric drive motors ( 18 ), which operate via corresponding sensors and a corresponding control according to the master / slave principle. Shoe roll according to one of the preceding claims, characterized in that a respective electric drive motor ( 18 ) is provided with a cooling. Shoe roll according to claim 13, characterized in that the electric drive motor ( 18 ) is cooled with fluid, gas or air, water and / or oil. Shoe roll according to one of the preceding claims, characterized in that in the interior of the roll on the clamping disks ( 16 ) each designed as a ring gear ( 28 ), in which a flying pinion ( 30 ) intervenes. Shoe roll according to claim 15, characterized in that the pinions ( 30 ) are each mounted in a displaceable carrier. Shoe roll according to claim 16, characterized in that a respective carrier on the one hand on a non-rotating part of the respective clamping device for the jacket ( 12 ) and on the other hand in a support body ( 32 ) is guided. Shoe roll according to one of the preceding claims, characterized in that the pinions ( 30 ) each on a pinion shaft ( 34 ), which are displaceable via a spline with a respective, in a supporting body ( 32 ) stored intermediate shaft ( 36 ) is coupled. Shoe roll according to one of the preceding claims, characterized in that the intermediate shafts ( 36 ) each via a metal bellows coupling ( 20 ) with the relevant drive shaft ( 24 ) are coupled. Shoe roll according to one of the preceding claims, characterized in that a respective pinion shaft ( 34 ) firmly on the bearing sleeve ( 38 ) is firmly stored, on which also the relevant clamping sleeve ( 16 ) is stored. Shoe roll according to claim 20, characterized in that between a respective pinion shaft ( 34 ) and the respective drive shaft a universal joint ( 42 ) is provided. Shoe roll according to one of the preceding claims, characterized by a crowned toothing of pinion ( 30 ) and / or gear ( 28 ). Shoe roll according to one of the preceding claims, characterized in that in the stator of a respective electric drive motor ( 18 ), an air pressure prevails, this pressure is preferably slightly higher than the internal pressure of the roller. Shoe roll according to one of the preceding claims, characterized in that the sheath ( 12 ) with respect to a fixed support body ( 32 ) of the roller is radially adjustable. Shoe roll, in particular according to one of the preceding claims, characterized in that in the circumferential direction before and / or behind a press shoe ( 50 ), preferably in at least an upper quadrant of the roll, an oil scraper strip ( 46 ) is provided. Shoe roll according to one of the preceding claims, characterized in that the Ölabstreifleiste ( 46 ) at an open nip formed with a counter-element to the shell ( 12 ) can be pressed. Shoe roll according to claim 25 or 26, characterized in that an oil pan ( 48 ) is provided, in which the stripped oil passes by gravity and over which this oil is traceable in the cooling oil circuit. Shoe roll, in particular according to one of the preceding claims, characterized in that for setting different radial jacket positions relative to a fixed support body ( 32 ) at least one coat ( 12 ) acting on pressing element is provided with a shim. Shoe roll according to one of the preceding claims, characterized in that the sheath ( 12 ) can be acted upon via two arranged perpendicular to the circumferential direction of the contact pressure element rows. Shoe roll according to claim 29, characterized that the two Anpresselementreihen separated from each other with pressure can be acted upon. Shoe roll according to one of the preceding claims, characterized marked that on the driver's and the drive side in each case at least the four outermost pressing elements individually with different pressures are bearable.