CA2157089A1 - Deflection adjustment roller - Google Patents
Deflection adjustment rollerInfo
- Publication number
- CA2157089A1 CA2157089A1 CA 2157089 CA2157089A CA2157089A1 CA 2157089 A1 CA2157089 A1 CA 2157089A1 CA 2157089 CA2157089 CA 2157089 CA 2157089 A CA2157089 A CA 2157089A CA 2157089 A1 CA2157089 A1 CA 2157089A1
- Authority
- CA
- Canada
- Prior art keywords
- pressure
- adjustable roll
- deflection adjustable
- bearing
- roll
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
- F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
- F16C13/024—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle
- F16C13/026—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure
- F16C13/028—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle adjustable for positioning, e.g. radial movable bearings for controlling the deflection along the length of the roll mantle by fluid pressure with a plurality of supports along the length of the roll mantle, e.g. hydraulic jacks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0206—Controlled deflection rolls
- D21G1/0213—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member
- D21G1/022—Controlled deflection rolls with deflection compensation means acting between the roller shell and its supporting member the means using fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/14—Roller pairs
- B65H2404/145—Roller pairs other
- B65H2404/1451—Pressure
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Deflection adjustable roll. A deflection adjustable roll is comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each support element has at least one cylinder-piston device, for the formation of a contact force, and a bearing shoe with a separate lubricating fluid supply, wherein the fluid supply of the pressure chambers is accomplished at least in separated groups, with the deflection adjustable roll functioning in a vibration-damping manner even while being supported via a large number of support elements, and, with reference to the pressure supply of the support elements, is executed in a pressure-accumulating or storing manner, wherein the pressure chambers and/or at least sections of each of the pressure conduits which connect a respective pressure chamber with the pressure source, to a determined degree, change their chamber capacities for the pressure fluid versus a force in dependence upon the pressure emanating from the pressure fluid itself.
Description
P13980.SO1 DEFLECTION AW USTABLE ROLL
CROSS REFERENCE TO RELATED APPLICATIONS
This application claims the priority of German Application No. DE 44 30 666.0, filed August 29, 1994, the disclosure of which is incorporated herein by reference in its entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention pertains to a deflection adjustable controlled roll comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each support element has at least one cylinder-piston device, for the formation of a contact force, and a bearing shoe with a separate lubricating fluid supply and wherein the fluid supply of pressure chambers of the cylinder-piston devices is accomplished at least in separated groups, with such rolls being utilized during the production or treatment of web shaped materials.
0 2. Discussion of the Background of the Invention and Material Information Such rolls are known, for example, from Swiss Patent Publication CH-PS 673 051. Added to this is that in this solution the delivery of the pressure fluid, to the pressure chamber of the cylinder-piston devices, is separated from the supply of the lubricating fluid to the bearing pockets of the bearing shoes. In addition to the thermal separation of the fluid circuits, this solution has the particular advantages that the lubrication is carried out independently of the pressure circuit and thereby not, as is the case with a connection between the pressure chambers and the bearing 21~70~9 P13980.SOl pockets, there is a proportional dependence of the quantity of the lubrication fluid upon the pressure in the cylinder-piston device. The remaining disadvantage is that, in operation, the possibly occurring vibrations, cannot be damped to a sufficient degree.
In addition, rolls having a large number of support elements also require a large number of pressure conduits, whose diameter, due to the limitations of the roll or of the carrier, must thus be quite small. This in turn has a higher sensitivity with respect to leakage. While it is known that the thus resulting pressure losses can be compensated via a pressure reservoir located outside of the roll, such a solution will fail in most instances due to the high costs thereof.
It is thus the task or object of this invention to produce a deflection adjustable roll whose pressure supply is provided in a pressure reservoir manner, at low cost and which, particularly even in the support of a high number of support elements, acts in a vibration damping manner, at low cost.
SUMMARY OF THE INVENTION
This task or object is achieved via the devices set forth in the appended claims wherein a main embodiment of the deflection adjustable roll of this invention is comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each support element has at least one cylinder-piston device, for the formation of a contact force, a bearing shoe with a separate lubricating fluid supply, wherein the fluid supply of pressure chambers of P13980.SOl the cylinder-piston devices is accomplished at least in separated groups, wherein at least one of each respective pressure chamber without a consequence upon the distance between the roll jacket and the carrier and at least one section of the pressure conduit, which connects each pressure chamber with a pressure source, changes the pressure fluid chamber storage capacity thereof, versus a force, in dependence upon the pressure emanating from the pressure fluid itself.
In that manner, since each pressure chamber, without influencing the distance between the roll covering and the carrier and/or of at least one section of the pressure conduit that connects the pressure chamber with a pressure source, up to a predetermined degree, changes the chamber capacity of the pressure fluid versus a force in dependence upon the pressure emanating from the pressure fluid itself, that is, which particularly increases its holding capacity during the increasing pressure of the pressure fluid, vibrations emanating from the roll covering can be damped at low expense and the pressure of the pressure fluid, even during leakage thereof, can be maintained to a substantial degree. The chamber capacity increase is above that of pressure conduits made of metal.
With regard to the other embodiments of this invention, it is herewith also possible that a least a section or segment of the pressure conduit is comprised of flexible material and/or that at least one wall, forming a boundary of the cylinder-piston device, is formed as a sealingly guided piston wherein the piston is supported on a spring member that acts in the direction of the pressure chamber. This spring member can, for example, in the form of a cup or plate spring, act in P13980.S01 a vibration-damping manner and/or be provided in parallel with or with series engaged damping elements.
In order that the support elements, particularly in regard to vibration damping, behave in the same manner, the pressure conduits, provided between the pressure source and each respective pressure element, should be substantially identical in terms of construction and material composition, and above all, should be of substantially the same length.
Since the support elements are located at different distances from the roll ends, it is recommended in this connection that at least the section of the pressure conduit, that extends within the deflection adjustable roll, be comprised of elastic, flexible, vibration damping material, wherein the portions of the pressure conduits that are located within the deflection adjustable roll already have the same length, that is, that the differing distances that the support elements can be compensated for via a corresponding rerouting or relocation of the at least partially flexible pressure conduits.
The use of pressure conduits, in addition, in contrast to the normally usually axially extending bores in the carrier, in regard to the expense involved, represents a sensible from of implementation, if a large number, for example, more than thirty support elements are to be independently controlled.
The lubrication of the gap between the bearing shoe and the roll covering can be accomplished either hydrodynamically and/or hydrostatically. During at least partial hydrostatic operation, the bearing shoes of the support elements within the utilized or effective bearing area, have hydrostatic bearing pockets, which as already previously noted are P13980.S01 preferably separately supplied with a lubricating fluid by the pressure conduits of the pressure chambers.
An advantageous embodiment thereby results if a portion of the bearing shoe, which forms the bearing surface, at the same time forms a portion of an axially extending ledge or strip that extends over several support elements. This is, among other things, favorable in terms of the construction costs, when the strip includes at least one axially extending bore for the supply of the lubricating fluid to the bearing pockets. If several axially arranged strips are utilized, the axial bores thereof should be connected directly with each other, without however significantly limiting the relative flexibility of the adjacent strips.
In order that the strip adapts or conforms itself to the roll covering, the strip should be more flexible than or at least be similarly as flexible as the roll covering. In addition, it is of advantage if the strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll. This provides the possibility for reducing the turbulence or vorticity losses emanating from the fluid that collects between the roll covering and the carrier, since this fluid, during rotation, can flow through the channels.
Since at least portions of the deflection adjustable roll heat up during operation, and the strip has a differing, for example, lesser coefficient of thermal expansion than the carrier, it is of advantage if the strip is relatively rigidly connected with the support element, so that the support elements are pivotally supported on the carrier in at least the axial direction, so that the support elements, starting at 21~7089 P13980.SOl a slight inclination to the nearest respective end of the deflection adjustable roll, in a non-temperature controlled state, at the operating temperature, can incline slightly toward the middle of the deflection adjustable roll.
Due to the low leakage and the limitation of the stress or tension of the pressure chamber and/or of the pressure conduits, it is possible, without difficulty, at times, to separate the pressure chambers from the central pressure source, as long as the pressure is maintained. Even during leakage of pressure fluid from the cylinder-piston device, the pressure of the pressure fluid will only change slightly.
Particularly in the control of a large number of support elements, an economical variation provides, that the pressure conduits are connected only singly and subsequently with the pressure source that determines the corresponding pressure.
In order to minimize the required cycle time, it is of course also feasible that groups of support elements are each associated with a pressure source.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention which is set forth with reference to three main embodiments thereof will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein throughout the various figures of the drawings, there have generally been used the same reference characters to denote the same or analogous components and wherein:
Fig. 1 is a partial cross sectional view of the deflection adjustable roll of this invention;
P13980.SOl Fig. 2 is a substantially schematic representations of a second main embodiment of this invention; and Fig. 3 is a substantially schematic representations of a third main embodiment of this invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS AND BEST
MODE
With respect to the drawings it is to be understood that only enough of the construction of the invention and the surrounding environment in which the invention is employed have been depicted therein, in order to simplify the illustrations, as needed for those skilled in the art to readily understand the underlying principles and concepts of the invention.
The deflection adjustable rolls of this invention are essentially comprised of a carrier 1 and a roll covering or jacket 2 rotatable thereabout, with covering 2 being supported via several axially extending support elements 3 on carrier 1.
Such deflection controlled rolls preferably form, with other rolls, an apparatus or gap for the production or treatment of web shaped material, for example fiber webs or bands.
In order to act upon even locally limited irregularities of the fiber web, the implementation of multiple axially arranged, relative to the roll, pressure zones is important.
In order that support elements 3, having a width of, for example, 40 - 100 mm, show only a locally limited effect, in these cases the flexible roll coverings 2 are of major importance.
Each of support elements 3 includes a cylinder-piston device 4, for the formation of a contact force, and a bearing P13980.S01 shoe 5. As per Fig. 1, pressure chambers 6, without a substantial change of the distance between roll jacket 2 and carrier 1, together with a predominant section 7 of pressure conduit 8, which connects each pressure chamber 6 with the pressure source, change their pressure fluid retention volume to a certain degree, versus or against a force, in dependence upon the pressure emanating from the pressure fluid itself.
This is accomplished in tangible form, in one instance, in that a wall, forming the boundary or limit of cylinder-piston device 4, in this instance it being the piston orannular piston 9 itself, which is sealingly guided or supported at the cylinder as well as a pin 15 that also contains the fluid inlet, is supported on a spring member 10, here in the form of a packet of cup or plate springs, acting in the direction of pressure chamber 6. In another instance, the pressure conduits are provided in an identical manner, wherein a predetermined section or segment 7 of pressure conduit 8, that is located within the deflection adjustable roll, are comprised of elastic , flexible , vibration-damping material and wherein the portions of pressure conduits 8, located within the deflection adjustable roll, are of substantially equal length. This ensures that all support elements act in the same manner, since the damping and pressure accumulation emanates substantially from spring member 10 and the elastic material of pressure conduits 8.
The lubrication of the bearing shoes 5 is accomplished here in a hydrostatic manner, via hydrostatic bearing pockets 11 arranged within the actual or effective bearing surface, with the bearing pockets being supplied, separately by pressure conduits 8 of pressure chambers 6, with a lubricating fluid, so that the lubrication as well as the temperature P13980.S01 control of the aperture or gap can be accomplished independently.
In order to even out the transitions between the support elements 3, particularly with the use of flexible roll coverings 2, the portion of the bearing shoe 5 that forms the bearing area is, at the same time, a portion of an axially extending ledge or strip 12, in order to simplify the input of the lubricating medium to bearing pockets 11, includes an axially extending bore 13, which is connected, at the ends thereof, with a conduit extending from the deflection adjustable roll and includes, of course, throttling channels to bearing pockets 11.
In order that strip 12 can even out the regions or areas between support elements 3, strip 12 is of flexible construction. In addition, strip 12 also includes several additional channels 14 that extend in approximately the circumferential direction of the deflection adjustable roll, with these channels permitting a through flow of the fluid that accumulates in roll jacket 2, thereby reducing the turbulence or vorticity losses.
If, for example, carrier 1 is made of metal and strip 12 is made of plastic material, due to the differences in the coefficients of thermal expansion, support elements 3 are pivotally or swivellably arranged at carrier 1 in the axal direction. The connection of pin 15 with pressure conduit 8 must be constructed correspondingly. In this manner, it becomes possible that support elements 3, starting at a slight inclination to the nearest respective end of the deflection adjustable roll in an non-temperature controlled state, at P13980.S01 higher operating temperatures, can incline slightly toward the center or middle of the deflection adjustable roll.
Due to the energy storing or accumulating construction of pressure chamber 6 and of sections 7 of pressure conduits 8, it is possible, at times, to separate pressure chamber 6 and its pressure conduits 8, from the pressure source that is located outside of the deflection adjustable roll. A
connection with the pressure source could be affected cyclically or only when the pressure, in a pressure chamber, is changed, insofar as a definite time period, for example in the range of minutes, is not exceeded. This serves to reduce the control expenses, particularly with deflection adjustable rolls having a large number of support elements 3.
In order to simplify the assembly it is of advantage that all pressure conduits 8 are joined with from the roll via an easily detachable multiple coupling. This can be accomplished, for example, via two opposed, sealed and detachably connected apertured plates, whose apertures or holes overlap each other and are each connected with a joint or terminal of a pressure conduit 8.
In order to improve the damping characteristics, it is of course possible to provide pressure conduits 8 with additional damping elements.
Figs. 2 and 3 illustrate two other embodiments in order to permit that pressure chambers 6 of cylinder-piston devices 4, with a substantial change of distance between the roll jacket 2 and carrier 1, can change their chamber or volume capacity for the pressure fluid against or versus a force, in P13980.SOl dependence upon the pressure emanating from the pressure fluid itself.
This task is achieved as per Fig. 2 in that a preferably damping spring member 10 is arranged between bearing shoe 5 and cylinder-piston device 4.
It is however, as per Fig. 3, also possible to support cylinder-piston device 4 itself on carrier 1, via a highly damped member 10.
In both instances, additional damping elements, as already described, can be utilized. In some circumstances, the embodiments can also be combined with each other.
While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims and the reasonably equivalent structures thereto. Further, the invention illustratively disclosed herein may be practiced in the absence of any element which is not specifically disclosed herein.
CROSS REFERENCE TO RELATED APPLICATIONS
This application claims the priority of German Application No. DE 44 30 666.0, filed August 29, 1994, the disclosure of which is incorporated herein by reference in its entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention This invention pertains to a deflection adjustable controlled roll comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each support element has at least one cylinder-piston device, for the formation of a contact force, and a bearing shoe with a separate lubricating fluid supply and wherein the fluid supply of pressure chambers of the cylinder-piston devices is accomplished at least in separated groups, with such rolls being utilized during the production or treatment of web shaped materials.
0 2. Discussion of the Background of the Invention and Material Information Such rolls are known, for example, from Swiss Patent Publication CH-PS 673 051. Added to this is that in this solution the delivery of the pressure fluid, to the pressure chamber of the cylinder-piston devices, is separated from the supply of the lubricating fluid to the bearing pockets of the bearing shoes. In addition to the thermal separation of the fluid circuits, this solution has the particular advantages that the lubrication is carried out independently of the pressure circuit and thereby not, as is the case with a connection between the pressure chambers and the bearing 21~70~9 P13980.SOl pockets, there is a proportional dependence of the quantity of the lubrication fluid upon the pressure in the cylinder-piston device. The remaining disadvantage is that, in operation, the possibly occurring vibrations, cannot be damped to a sufficient degree.
In addition, rolls having a large number of support elements also require a large number of pressure conduits, whose diameter, due to the limitations of the roll or of the carrier, must thus be quite small. This in turn has a higher sensitivity with respect to leakage. While it is known that the thus resulting pressure losses can be compensated via a pressure reservoir located outside of the roll, such a solution will fail in most instances due to the high costs thereof.
It is thus the task or object of this invention to produce a deflection adjustable roll whose pressure supply is provided in a pressure reservoir manner, at low cost and which, particularly even in the support of a high number of support elements, acts in a vibration damping manner, at low cost.
SUMMARY OF THE INVENTION
This task or object is achieved via the devices set forth in the appended claims wherein a main embodiment of the deflection adjustable roll of this invention is comprised of a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via several support elements, wherein each support element has at least one cylinder-piston device, for the formation of a contact force, a bearing shoe with a separate lubricating fluid supply, wherein the fluid supply of pressure chambers of P13980.SOl the cylinder-piston devices is accomplished at least in separated groups, wherein at least one of each respective pressure chamber without a consequence upon the distance between the roll jacket and the carrier and at least one section of the pressure conduit, which connects each pressure chamber with a pressure source, changes the pressure fluid chamber storage capacity thereof, versus a force, in dependence upon the pressure emanating from the pressure fluid itself.
In that manner, since each pressure chamber, without influencing the distance between the roll covering and the carrier and/or of at least one section of the pressure conduit that connects the pressure chamber with a pressure source, up to a predetermined degree, changes the chamber capacity of the pressure fluid versus a force in dependence upon the pressure emanating from the pressure fluid itself, that is, which particularly increases its holding capacity during the increasing pressure of the pressure fluid, vibrations emanating from the roll covering can be damped at low expense and the pressure of the pressure fluid, even during leakage thereof, can be maintained to a substantial degree. The chamber capacity increase is above that of pressure conduits made of metal.
With regard to the other embodiments of this invention, it is herewith also possible that a least a section or segment of the pressure conduit is comprised of flexible material and/or that at least one wall, forming a boundary of the cylinder-piston device, is formed as a sealingly guided piston wherein the piston is supported on a spring member that acts in the direction of the pressure chamber. This spring member can, for example, in the form of a cup or plate spring, act in P13980.S01 a vibration-damping manner and/or be provided in parallel with or with series engaged damping elements.
In order that the support elements, particularly in regard to vibration damping, behave in the same manner, the pressure conduits, provided between the pressure source and each respective pressure element, should be substantially identical in terms of construction and material composition, and above all, should be of substantially the same length.
Since the support elements are located at different distances from the roll ends, it is recommended in this connection that at least the section of the pressure conduit, that extends within the deflection adjustable roll, be comprised of elastic, flexible, vibration damping material, wherein the portions of the pressure conduits that are located within the deflection adjustable roll already have the same length, that is, that the differing distances that the support elements can be compensated for via a corresponding rerouting or relocation of the at least partially flexible pressure conduits.
The use of pressure conduits, in addition, in contrast to the normally usually axially extending bores in the carrier, in regard to the expense involved, represents a sensible from of implementation, if a large number, for example, more than thirty support elements are to be independently controlled.
The lubrication of the gap between the bearing shoe and the roll covering can be accomplished either hydrodynamically and/or hydrostatically. During at least partial hydrostatic operation, the bearing shoes of the support elements within the utilized or effective bearing area, have hydrostatic bearing pockets, which as already previously noted are P13980.S01 preferably separately supplied with a lubricating fluid by the pressure conduits of the pressure chambers.
An advantageous embodiment thereby results if a portion of the bearing shoe, which forms the bearing surface, at the same time forms a portion of an axially extending ledge or strip that extends over several support elements. This is, among other things, favorable in terms of the construction costs, when the strip includes at least one axially extending bore for the supply of the lubricating fluid to the bearing pockets. If several axially arranged strips are utilized, the axial bores thereof should be connected directly with each other, without however significantly limiting the relative flexibility of the adjacent strips.
In order that the strip adapts or conforms itself to the roll covering, the strip should be more flexible than or at least be similarly as flexible as the roll covering. In addition, it is of advantage if the strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll. This provides the possibility for reducing the turbulence or vorticity losses emanating from the fluid that collects between the roll covering and the carrier, since this fluid, during rotation, can flow through the channels.
Since at least portions of the deflection adjustable roll heat up during operation, and the strip has a differing, for example, lesser coefficient of thermal expansion than the carrier, it is of advantage if the strip is relatively rigidly connected with the support element, so that the support elements are pivotally supported on the carrier in at least the axial direction, so that the support elements, starting at 21~7089 P13980.SOl a slight inclination to the nearest respective end of the deflection adjustable roll, in a non-temperature controlled state, at the operating temperature, can incline slightly toward the middle of the deflection adjustable roll.
Due to the low leakage and the limitation of the stress or tension of the pressure chamber and/or of the pressure conduits, it is possible, without difficulty, at times, to separate the pressure chambers from the central pressure source, as long as the pressure is maintained. Even during leakage of pressure fluid from the cylinder-piston device, the pressure of the pressure fluid will only change slightly.
Particularly in the control of a large number of support elements, an economical variation provides, that the pressure conduits are connected only singly and subsequently with the pressure source that determines the corresponding pressure.
In order to minimize the required cycle time, it is of course also feasible that groups of support elements are each associated with a pressure source.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention which is set forth with reference to three main embodiments thereof will be better understood and objects other than those set forth above will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to the annexed drawings wherein throughout the various figures of the drawings, there have generally been used the same reference characters to denote the same or analogous components and wherein:
Fig. 1 is a partial cross sectional view of the deflection adjustable roll of this invention;
P13980.SOl Fig. 2 is a substantially schematic representations of a second main embodiment of this invention; and Fig. 3 is a substantially schematic representations of a third main embodiment of this invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS AND BEST
MODE
With respect to the drawings it is to be understood that only enough of the construction of the invention and the surrounding environment in which the invention is employed have been depicted therein, in order to simplify the illustrations, as needed for those skilled in the art to readily understand the underlying principles and concepts of the invention.
The deflection adjustable rolls of this invention are essentially comprised of a carrier 1 and a roll covering or jacket 2 rotatable thereabout, with covering 2 being supported via several axially extending support elements 3 on carrier 1.
Such deflection controlled rolls preferably form, with other rolls, an apparatus or gap for the production or treatment of web shaped material, for example fiber webs or bands.
In order to act upon even locally limited irregularities of the fiber web, the implementation of multiple axially arranged, relative to the roll, pressure zones is important.
In order that support elements 3, having a width of, for example, 40 - 100 mm, show only a locally limited effect, in these cases the flexible roll coverings 2 are of major importance.
Each of support elements 3 includes a cylinder-piston device 4, for the formation of a contact force, and a bearing P13980.S01 shoe 5. As per Fig. 1, pressure chambers 6, without a substantial change of the distance between roll jacket 2 and carrier 1, together with a predominant section 7 of pressure conduit 8, which connects each pressure chamber 6 with the pressure source, change their pressure fluid retention volume to a certain degree, versus or against a force, in dependence upon the pressure emanating from the pressure fluid itself.
This is accomplished in tangible form, in one instance, in that a wall, forming the boundary or limit of cylinder-piston device 4, in this instance it being the piston orannular piston 9 itself, which is sealingly guided or supported at the cylinder as well as a pin 15 that also contains the fluid inlet, is supported on a spring member 10, here in the form of a packet of cup or plate springs, acting in the direction of pressure chamber 6. In another instance, the pressure conduits are provided in an identical manner, wherein a predetermined section or segment 7 of pressure conduit 8, that is located within the deflection adjustable roll, are comprised of elastic , flexible , vibration-damping material and wherein the portions of pressure conduits 8, located within the deflection adjustable roll, are of substantially equal length. This ensures that all support elements act in the same manner, since the damping and pressure accumulation emanates substantially from spring member 10 and the elastic material of pressure conduits 8.
The lubrication of the bearing shoes 5 is accomplished here in a hydrostatic manner, via hydrostatic bearing pockets 11 arranged within the actual or effective bearing surface, with the bearing pockets being supplied, separately by pressure conduits 8 of pressure chambers 6, with a lubricating fluid, so that the lubrication as well as the temperature P13980.S01 control of the aperture or gap can be accomplished independently.
In order to even out the transitions between the support elements 3, particularly with the use of flexible roll coverings 2, the portion of the bearing shoe 5 that forms the bearing area is, at the same time, a portion of an axially extending ledge or strip 12, in order to simplify the input of the lubricating medium to bearing pockets 11, includes an axially extending bore 13, which is connected, at the ends thereof, with a conduit extending from the deflection adjustable roll and includes, of course, throttling channels to bearing pockets 11.
In order that strip 12 can even out the regions or areas between support elements 3, strip 12 is of flexible construction. In addition, strip 12 also includes several additional channels 14 that extend in approximately the circumferential direction of the deflection adjustable roll, with these channels permitting a through flow of the fluid that accumulates in roll jacket 2, thereby reducing the turbulence or vorticity losses.
If, for example, carrier 1 is made of metal and strip 12 is made of plastic material, due to the differences in the coefficients of thermal expansion, support elements 3 are pivotally or swivellably arranged at carrier 1 in the axal direction. The connection of pin 15 with pressure conduit 8 must be constructed correspondingly. In this manner, it becomes possible that support elements 3, starting at a slight inclination to the nearest respective end of the deflection adjustable roll in an non-temperature controlled state, at P13980.S01 higher operating temperatures, can incline slightly toward the center or middle of the deflection adjustable roll.
Due to the energy storing or accumulating construction of pressure chamber 6 and of sections 7 of pressure conduits 8, it is possible, at times, to separate pressure chamber 6 and its pressure conduits 8, from the pressure source that is located outside of the deflection adjustable roll. A
connection with the pressure source could be affected cyclically or only when the pressure, in a pressure chamber, is changed, insofar as a definite time period, for example in the range of minutes, is not exceeded. This serves to reduce the control expenses, particularly with deflection adjustable rolls having a large number of support elements 3.
In order to simplify the assembly it is of advantage that all pressure conduits 8 are joined with from the roll via an easily detachable multiple coupling. This can be accomplished, for example, via two opposed, sealed and detachably connected apertured plates, whose apertures or holes overlap each other and are each connected with a joint or terminal of a pressure conduit 8.
In order to improve the damping characteristics, it is of course possible to provide pressure conduits 8 with additional damping elements.
Figs. 2 and 3 illustrate two other embodiments in order to permit that pressure chambers 6 of cylinder-piston devices 4, with a substantial change of distance between the roll jacket 2 and carrier 1, can change their chamber or volume capacity for the pressure fluid against or versus a force, in P13980.SOl dependence upon the pressure emanating from the pressure fluid itself.
This task is achieved as per Fig. 2 in that a preferably damping spring member 10 is arranged between bearing shoe 5 and cylinder-piston device 4.
It is however, as per Fig. 3, also possible to support cylinder-piston device 4 itself on carrier 1, via a highly damped member 10.
In both instances, additional damping elements, as already described, can be utilized. In some circumstances, the embodiments can also be combined with each other.
While there are shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto, but may be otherwise variously embodied and practiced within the scope of the following claims and the reasonably equivalent structures thereto. Further, the invention illustratively disclosed herein may be practiced in the absence of any element which is not specifically disclosed herein.
Claims (50)
1. A deflection adjustable roll, comprising a fixed carrier and a roll jacket rotatable about the carrier, with the roll jacket being supported on the carrier via a plurality of support elements, wherein each support element includes at least one cylinder-piston device, for the formation of a contact force, a bearing shoe with a separate lubricating fluid supply, wherein the fluid supply of pressure chambers of the cylinder-piston devices is accomplished at least in separated groups, wherein at least one of each respective pressure chamber without a consequence upon the distance between the roll jacket and the carrier, and at least one section of the pressure conduit, which connects each pressure chamber with a pressure source, changes the pressure fluid chamber storage capacity thereof, versus a force, in dependence upon the pressure emanating from the pressure fluid itself.
2. The deflection adjustable roll of claim 1, wherein at least one wall, forming a boundary of the cylinder-piston device, is formed as a sealingly guided piston, with the piston being supported on a spring member, acting in the direction of the pressure chamber, with the spring member itself at least one of acting in a vibration-damping manner and being provided in one of parallel with and in series with engaged damping elements.
3. The deflection adjustable roll of claim 1, wherein a spring member is provided between the bearing shoe and the cylinder-piston device, with the spring member itself acting in at least one of a vibration damping manner and being provided in one of parallel with and in series with engaged damping elements.
4. The deflection adjustable roll of claim 2, wherein a spring member is provided between the bearing shoe and the cylinder-piston device, with the spring member itself acting in at least one of a vibration damping manner and being provided in one of parallel with and in series with engaged damping elements.
5. The deflection adjustable roll of claim 1, wherein the cylinder-piston device is supported on the carrier via a spring member, with the spring member itself acting in at least one of a vibration-damping manner and being provided in one of parallel with and in series with engaged damping elements.
6. The deflection adjustable roll of claim 2, wherein the cylinder-piston device is supported on the carrier via a spring member, with the spring member itself acting in at least one of a vibration-damping manner and being provided in one of parallel with and in series with engaged damping elements.
7. The deflection adjustable roll of claim 3, wherein the cylinder-piston device is supported on the carrier via a spring member, with the spring member itself acting in at least one of a vibration-damping manner and being provided in one of parallel with and in series with engaged damping elements.
8. The deflection adjustable roll of claim 1, wherein at least a segment of the pressure conduit is comprised of an extensible, vibration-damping material.
9. The deflection adjustable roll of claim 2, wherein at least a segment of the pressure conduit is comprised of an extensible, vibration-damping material.
10. The deflection adjustable roll of claim 3, wherein at least a segment of the pressure conduit is comprised of an extensible, vibration-damping material.
11. The deflection adjustable roll of claim 5, wherein at least a segment of the pressure conduit is comprised of an extensible, vibration-damping material.
12. The deflection adjustable roll of claim 1, wherein the pressure conduits, in regard to the construction and the material composition thereof, are substantially identical.
13. The deflection adjustable roll of claim 2, wherein the pressure conduits, in regard to the construction and the material composition thereof, are substantially identical.
14. The deflection adjustable roll of claim 3, wherein the pressure conduits, in regard to the construction and the material composition thereof, are substantially identical.
15. The deflection adjustable roll of claim 5, wherein the pressure conduits, in regard to the construction and the material composition thereof, are substantially identical.
16. The deflection adjustable roll of claim 8, wherein the pressure conduits, in regard to the construction and the material composition thereof, are substantially identical.
17. The deflection adjustable roll of claim 1, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
18. The deflection adjustable roll of claim 2, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
19. The deflection adjustable roll of claim 3, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
20. The deflection adjustable roll of claim 5, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
21. The deflection adjustable roll of claim 8, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
22. The deflection adjustable roll of claim 12, wherein the pressure conduits, extending between a pressure source and the support elements, are of approximately the same length.
23. The deflection adjustable roll of claim 17, wherein at least one segment each of the pressure conduits, is contained within the deflection adjustable roll and is comprised of an elastic material, with the portion of the pressure conduits contained within the deflection adjustable roll being of approximately the same length.
24. The deflection adjustable roll of claim 1, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
25. The deflection adjustable roll of claim 2, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
26. The deflection adjustable roll of claim 3, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
27. The deflection adjustable roll of claim 5, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
28. The deflection adjustable roll of claim 8, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
29. The deflection adjustable roll of claim 12, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
30. The deflection adjustable roll of claim 17, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
31. The deflection adjustable roll of claim 23, wherein the bearing shoes of the support elements, within active bearing areas thereof include hydrostatic bearing pockets, with the bearing pockets being separately supplied with a lubricating fluid via the pressure conduits of the pressure chambers.
32. The deflection adjustable roll of claim 1, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
33. The deflection adjustable roll of claim 2, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
34. The deflection adjustable roll of claim 3, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
35. The deflection adjustable roll of claim 5, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
36. The deflection adjustable roll of claim 8, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
37. The deflection adjustable roll of claim 12, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
38. The deflection adjustable roll of claim 17, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
39. The deflection adjustable roll of claim 23, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
40. The deflection adjustable roll of claim 24, wherein the portions of the bearing shoes that comprise bearing surfaces thereof are, at the same time, a portion of a strip, with the strip extending axially over at least several of the support elements.
41. The deflection adjustable roll of claim 32, wherein the strip includes at least one axially extending bore serving for the delivery of the lubricating fluid to the bearing pockets.
42. The deflection adjustable roll of claim 41 including several strips, wherein the axially extending bores thereof are closely connected with each other.
43. The deflection adjustable roll of claim 32, wherein the strip is one of more flexible and approximately as flexible as the roll covering.
44. The deflection adjustable roll of claim 41, wherein the strip is one of more flexible and approximately as flexible as the roll covering.
45. The deflection adjustable roll of claim 42, wherein the strips are one of more flexible and approximately as flexible as the roll covering.
46. The deflection adjustable roll of claim 32, wherein the strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll.
47. The deflection adjustable roll of claim 41, wherein the strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll.
48. The deflection adjustable roll of claim 42, wherein each strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll.
49. The deflection adjustable roll of claim 43, wherein the strip includes several channels extending in approximately the circumferential direction of the deflection adjustable roll.
50. The deflection adjustable roll of claim 1, wherein the pressure chambers in one of singly and in groups, at times, can be separated from the pressure source, as long as the pressure is maintained.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4430666.0 | 1994-08-29 | ||
| DE19944430666 DE4430666C2 (en) | 1994-08-29 | 1994-08-29 | Deflection adjustment roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2157089A1 true CA2157089A1 (en) | 1996-03-01 |
Family
ID=6526848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2157089 Abandoned CA2157089A1 (en) | 1994-08-29 | 1995-08-28 | Deflection adjustment roller |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA2157089A1 (en) |
| DE (1) | DE4430666C2 (en) |
| FI (1) | FI954032A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10239097A1 (en) * | 2002-08-26 | 2004-03-11 | Voith Paper Patent Gmbh | Deflection roll |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT360831B (en) * | 1977-12-20 | 1981-02-10 | Escher Wyss Ag | HYDRAULIC SUPPORT ELEMENT |
| CH635656A5 (en) * | 1979-02-26 | 1983-04-15 | Escher Wyss Ag | Hydrostatic stuetzvorrichtung. |
| DE3010741C2 (en) * | 1980-03-18 | 1986-10-09 | Sulzer-Escher Wyss AG, Zürich | Support element |
| DE3012732C2 (en) * | 1980-03-25 | 1986-05-07 | Sulzer-Escher Wyss AG, Zürich | Hydrostatic support element for supporting a supported part on a supporting part |
| DE3151001C2 (en) * | 1981-12-23 | 1986-04-24 | Kleinewefers Gmbh, 4150 Krefeld | Hydrostatically mounted roller, in particular pressure treatment roller |
| CH673051A5 (en) * | 1986-07-08 | 1990-01-31 | Escher Wyss Ag | |
| DE4223715C2 (en) * | 1992-07-18 | 1995-07-20 | Escher Wyss Gmbh | roller |
-
1994
- 1994-08-29 DE DE19944430666 patent/DE4430666C2/en not_active Expired - Fee Related
-
1995
- 1995-08-28 FI FI954032A patent/FI954032A/en unknown
- 1995-08-28 CA CA 2157089 patent/CA2157089A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| FI954032A (en) | 1996-03-01 |
| DE4430666C2 (en) | 1998-07-09 |
| DE4430666A1 (en) | 1996-03-14 |
| FI954032A0 (en) | 1995-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |