CA2151434A1 - Support element - Google Patents
Support elementInfo
- Publication number
- CA2151434A1 CA2151434A1 CA 2151434 CA2151434A CA2151434A1 CA 2151434 A1 CA2151434 A1 CA 2151434A1 CA 2151434 CA2151434 CA 2151434 CA 2151434 A CA2151434 A CA 2151434A CA 2151434 A1 CA2151434 A1 CA 2151434A1
- Authority
- CA
- Canada
- Prior art keywords
- support element
- fluid
- band
- support
- fluid sump
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0209—Wet presses with extended press nip
- D21F3/0218—Shoe presses
-
- 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
-
- 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
Abstract
The invention pertains to a support element (1) for supporting a band-shaped element (3) with respect to a fixed carrier (4) wherein the element (3) moves around the carrier.
As a result thereof, a temperature compensation is achieved, particularly at the support element (1) via simple means.
This is achieved in that the support element (1) is located in a fluid sump (5) which is so constructed that the fluid is in good thermally conductive connection with the portion of the support element (1) that is unevenly thermally stressed.
As a result thereof, a temperature compensation is achieved, particularly at the support element (1) via simple means.
This is achieved in that the support element (1) is located in a fluid sump (5) which is so constructed that the fluid is in good thermally conductive connection with the portion of the support element (1) that is unevenly thermally stressed.
Description
215143~
P13826.TR1 ~i U r~KT T!T.T!Ml;!NT
This invention pertains to a support element of the type described in the preamble of claim 1. Such devices are used particularly in the production and processing of material webs.
Due to lubrication of the support elements, the space between the band-shaped element and the carrier is generally partially filled with lubricant. Particularly high web speeds, due to the turbulence of the lubricant not flowing around the support elements, lead to a considerable loss of drive performance or efficiency, which in turn, causes heating up of the lubricant. This is particularly disadvantageous at the rolls which must have relatively cold surfaces or in those instances where the band-shaped elements are sensitive to heat.
This problem has been previously handled by cooling the lubricant outside of the roll which is of course a disadvantage from the energy standpoint. In addition, it was suggested in European Patent Publication EP 579 930 to provide the support elements with flow channels extending in the circumferential direction of the roll. However, this is still not satisfactory.
There is also the additional problem that the lubricant is heated up due to the friction between the band-shaped element and the support element. If several support elements are utilized, the support surfaces thereof may, due to differing contact pressures, have varying temperatures, which have negative effects upon the uniformity of the material web.
215143~
P13826.TRl Temperature variations can even occur at each support element, this being particularly the case with reference to the inlet and outlet of the lubricating gap. The temperature difference, caused by the heating up of the lubricating fluid during its flow, in turn, leads to a deformation of the support element, which of course has a negative effect upon the function thereof.
As a result thereof, it is suggested in German Patent Publication DE-OS 39 25 019, to provide the support element with a temperature equalization conduit, via which appropriately temperature controlled fluid is conveyed to the inner surface of the roll jacket. Such a solution is however relatively costly from the constructional standpoint.
German Patent Publication DE-PS 35 28 333 describes a roll having a support shoe extending for the entire roll length. The hereby achieved leakage or drainage chambers merely serve for a temperature compensation along the roll and are, therefore, unsuitable.
This invention has the task or object, to achieve, with constructively simple measures, a temperature compensation at the support element, particularly with reference to the inlet and outlet of the lubrication gap and, in addition to influencing the temperature of the support element, reducing the unwanted turbulence losses.
The task or object was solved or achieved in accordance with the invention as per the apparatus or device set forth in claim 1, with the depending claims setting forth specific embodiments thereof.
2151q34 P13826.TR1 Since the support element, alone or together with other support elements, is situated in a fluid sump, whose open side faces the surface of the band-shaped element that is to be supported and is so shaped that the fluid therein is in good S thermally conductive communication with the portion of the support element that is otherwise stressed in a thermally undesired manner, and that the fluid, in the fluid sump, can exert no pressure upon the surface that is to be supported, it is possible to equalize or compensate the temperatures at desired areas of the support element and thereby to particularly counter the deformation of the support element.
In order that fluid flows around the support element(s) as fully as possible and to achieve temperature equalization within the entire fluid, it is necessary that the portion of the fluid sump, in the direction of movement of the band-shaped element, located in front of the support element, is connected with the portion of the fluid sump located after the support element, via at least one conduit extending through the support element or extending around the support element, wherein at least two such conduits extend along the carrier.
These connections should therefore have a low resistance to flow. In order, in addition to the temperature compensation of the support element along the carrier, to assure particularly effective temperature compensation also in the direction of movement of the band-shaped element, at least three conduits should be provided along the carrier which preferably have about the same spacing from each other. This spacing between the channels should preferably be in the range from about 10 to 250 mm. In addition, the requirement, that the collected fluid should exert no pressure upon the surface to be supported, permits a very simple construction or shaping of the fluid sump, since, among other things, a compression resistant seal, with respect to the surface to be supported, P13826.TR1 becomes superfluous. In complement thereof, this also eliminates an adulteration of the pressure effect emanating from the support elements.
In case that the fluid sump includes an outlet or drain emanating directly from the roll, the filling of the space, between the band-shaped element and the carrier, with lubricating fluid, can also be avoided. This, in turn, leads to the result that there is no turbulence and thus no heating up of the lubricant.
In order to be able to remove the lubricating fluid from the band-shaped element, scraper arrangements or devices are utilized in the direction of movement of the band-shaped element, after the support element, via which the fluid is conveyed to the fluid sump. If both directions of movement of the band-shaped element are utilized, then corresponding scraper devices are utilized at both ends of the support element. It is of course also possible, in place of the scraper devices, to utilize the support element itself for the removal of the fluid at the inlet gap.
For the control of the fill height of the fluid in the fluid sump, the sump is provided with a controllable outlet.
This permits the influencing of the thermal flow between particular areas of the support element and the collected fluid. In complement thereof, or for only itself, the fluid sump can also utilize a controllable input of temperature controlled, preferably cooled, fluid. This permits not only the influencing of the fluid height but, in a decisive manner the influencing of the temperature of the fluid. Herewith, the criteria for the control of the input and outlet are the fill height and/or the temperature of the fluid.
215143~
P13826.TR1 In addition to the connecting conduits through or around the support elements, naturally other components for promoting the circulation of the fluid can be utilized. In this connection, it, for example, an advantage, if the inlets and outlets are placed or located in differing sides of the fluid sump, this placement alone already providing circulation of the fluid through the conduits of the support element.
This invention finds utility not only with flexible band-shaped elements, which, for example, are used for forming relatively long press gaps, but also with rolls in which the band-shaped element takes the form of a relatively rigid roll covering.
Particularly then when the support element is movable with respect to the carrier, it is advantageous when the scraper device and/or at least the side walls of the fluid sump are connected with the support element and are movable therewith in the direction of the band-shaped element.
Therewith, a deflection of the carrier can be compensated relative to the band-shaped element. In the implementation of this feature it is possible, for example, to attach the entire fluid sump at the support element or to arrange the side walls to be movably sealed relative to the bottom of the fluid sump.
The invention will be described in more detail hereinafter with the aid of two embodiments. The accompanying drawings show:
Fig. 1 is an embodiment utilizing a flexible band-shaped element; and Fig. 2 is a further embodiment with a roll having a relatively rigid roll covering or jacket.
215143~
P13826.TR1 Fig. 1 sets forth a first embodiment, wherein a support element 1 is provided with hydrodynamic lubrication of the support area or surface 2, for supporting an endless, band-shaped or formed flexible element 3 with respect to a carrier 4 fixed in a support. It is of course possible that the support area, in addition, can also utilize bearing pockets for hydrostatic lubrication. Element 3 has, therefore, the approximate shape of a tube or hose and moves around or about carrier 4. Element 3 can be closed at the sides of the tube or hose so that escape of the lubricating fluid into other regions of the machine or onto material web 17 is prevented.
Support element 1 forms a concave contact pressure surface, which is pressed against a cylindrical roll 16. Such an elongated press gap is particularly well suited to the dehydration of fiber webs.
Since the support is accomplished via a directional component acting predominantly in opposition to the force of gravity, it is possible that the fluid, exiting from the gap between support surface 2 of support element 1 and the facing side of band-shaped element 3, need not be forcibly sealed with respect to band-formed element 3. In the subject example, the addition of fluid is accomplished via a lubricating device 18, affixed at the inlet gap of support element 1, thereby assuring hydrodynamic lubrication.
The support function can be accomplished via several support elements arranged along carrier 4 or via a single support element 1, in the form of a support ledge or strip, extending over the entire width of the material web 17 that is to be treated. In every instance however, each support element 1, either alone or in combination with other support 2151~3~
P13826.TR1 elements, is located in a fluid sump 5, whose open side is directed or faces the surface of the band-shaped element 3 that is to be supported. In order to most comprehensively and uniformly influence support element 1, the portion of the fluid sump, in the direction of the movement of band-shaped element 3, located in front of the support element 1, is connected with the portion of the fluid sump 5 located after the support element 1, via at least one conduit 7 extending around the support element 1.
In order to be able to obtain the desired thermal effect, the collected fluid must be in good thermally conductive communication with the portion(s) of support element 1 that is otherwise stressed in a thermally undesired manner. In this instance, among other things, the achievable fluid height, within fluid sump 5, is also of importance. The fluid height can be limited via an overflow into the space between band-formed element 3 and carrier 4. If this is not desired, due to turbulence losses, it is suggested to utilize a drain 9, extending directly from the apparatus, in the manner shown in Fig. 2.
In order to channel the largest possible portion of the lubricating fluid into fluid sump 5, a scraper apparatus or wiper device is located in the direction of movement of band-shaped element 3, after support element 1.
Fig. 2 shows an embodiment wherein band-shaped element 3 takes the form of a roll jacket or covering of a roll, wherein the roll jacket rotates around a fixed carrier 4. This roll forms, together with oppositely located roll 16, a treating gap for a material web 17, as for example, occurs during the smoothing of fiber webs.
215143~
P13826.TRl In distinction relative to the first embodiment, the lubrication here occurs between band-shaped element 3 and support surface 2 of support element 1, in a hydrostatic manner, that is via the addition of fluid from the surge chamber in the bearing pockets of support surface 2 of support element 1. Generally, in such constructions, several support elements are located adjacently to each other along carrier 4 which of course is also possible in the direction of movement of band-shaped element 3.
Since the support here is also accomplished via a directional component acting predominately in opposition to the force of gravity, the overflowing lubricating fluid of support element 1 can readily be collected in one or more fluid sumps 5. In the event that the support is accomplished in a different direction, sealing of fluid sump 5, relative to band-shaped element 3, may be required. In this example, at least several, if not all, support elements 1 should be situated in a fluid sump 5, whose open side faces the surface of the band-shaped element 3 that is to be supported. This fluid sump is so designed or constructed that the fluid in the fluid sump is in good thermally conductive communication with the portions of the support element 1 that are otherwise stressed in a thermally undesired manner. At the same time, the portion of the fluid sump 5, in the direction of movement of band-shaped element 3, located in front of the support element 1, is connected with the portion of the fluid sump 5 located after the support elements 1 via conduits 7 extending through the support elements 1. Since there is no preferred direction of movement here, a scraper device is located both before and after the support elements for channelling the fluid of band-shaped element 3 into fluid sump 5. Fluid sump 5, in turn, is so constructed that no pressure is built up 2151~3~
P13826.TR1 therein, that is, that fluid sump 5, if at all, is only correspondingly sealed with respect to the area or surface of the band-shaped element 3, that is to be supported.
In order to be able to influence the height, and thereby be able to influence the heat transmission resistance for desired areas or portions of support elements 1, fluid sump 5 is provided with a drain 9, wherein the amount of drainage can be controlled by valve 13. For augmenting same, supply or inlet 10 for temperature controlled fluid is also provided.
Therewith, not only the fill height of the fluid in fluid sump 5, but also the temperature thereof can be influenced. The supply or feed inlet 10 is fed via a pump 11 which obtains the fluid from a collection reservoir 6. Expediently, drain 9 extends into collection reservoir 6. Also located in supply or feed inlet 10, is a temperature control device 12, which generally cools the fluid provided thereto. Temperature control device 12 can of course, also be provided in other locations of the fluid circuit.
The control of valve 13, of pump 1, and of temperature control device 12, is accomplished via a control unit 14 which in turn is provided with information concerning fill height as well as the temperature of the fluid within fluid sump 5, via a measuring unit 15.
In order to assure adequate circulation of the fluid within fluid sump 5, inlets and outlets are provided with reference to the direction of movement of band-shaped element 3 on different sides of support element 1. It is also possible of course to utilize additional components in the form of nozzles in the inlet or the pump in fluid sump 5 for the controllable conveying or feeding of the fluid circulation 2151~3~
., .
P13826.TR1 with the goal of temperature stabilization of the fluid and thereby also of support elements 1.
Via the control of the temperature level, the temperature of support elements 1 and thereby the temperature of band-shaped elements 3 can also be influenced in axial zonesthereof, which is of particular advantage during the smoothing process. The spacing between channels or conduits 7 should preferably be in the range of between about 10 and 250 mm, which has the general effect that, with the utilization of but a few support elements 1, the conduits predominately extend through support elements 1.
P13826.TR1 ~i U r~KT T!T.T!Ml;!NT
This invention pertains to a support element of the type described in the preamble of claim 1. Such devices are used particularly in the production and processing of material webs.
Due to lubrication of the support elements, the space between the band-shaped element and the carrier is generally partially filled with lubricant. Particularly high web speeds, due to the turbulence of the lubricant not flowing around the support elements, lead to a considerable loss of drive performance or efficiency, which in turn, causes heating up of the lubricant. This is particularly disadvantageous at the rolls which must have relatively cold surfaces or in those instances where the band-shaped elements are sensitive to heat.
This problem has been previously handled by cooling the lubricant outside of the roll which is of course a disadvantage from the energy standpoint. In addition, it was suggested in European Patent Publication EP 579 930 to provide the support elements with flow channels extending in the circumferential direction of the roll. However, this is still not satisfactory.
There is also the additional problem that the lubricant is heated up due to the friction between the band-shaped element and the support element. If several support elements are utilized, the support surfaces thereof may, due to differing contact pressures, have varying temperatures, which have negative effects upon the uniformity of the material web.
215143~
P13826.TRl Temperature variations can even occur at each support element, this being particularly the case with reference to the inlet and outlet of the lubricating gap. The temperature difference, caused by the heating up of the lubricating fluid during its flow, in turn, leads to a deformation of the support element, which of course has a negative effect upon the function thereof.
As a result thereof, it is suggested in German Patent Publication DE-OS 39 25 019, to provide the support element with a temperature equalization conduit, via which appropriately temperature controlled fluid is conveyed to the inner surface of the roll jacket. Such a solution is however relatively costly from the constructional standpoint.
German Patent Publication DE-PS 35 28 333 describes a roll having a support shoe extending for the entire roll length. The hereby achieved leakage or drainage chambers merely serve for a temperature compensation along the roll and are, therefore, unsuitable.
This invention has the task or object, to achieve, with constructively simple measures, a temperature compensation at the support element, particularly with reference to the inlet and outlet of the lubrication gap and, in addition to influencing the temperature of the support element, reducing the unwanted turbulence losses.
The task or object was solved or achieved in accordance with the invention as per the apparatus or device set forth in claim 1, with the depending claims setting forth specific embodiments thereof.
2151q34 P13826.TR1 Since the support element, alone or together with other support elements, is situated in a fluid sump, whose open side faces the surface of the band-shaped element that is to be supported and is so shaped that the fluid therein is in good S thermally conductive communication with the portion of the support element that is otherwise stressed in a thermally undesired manner, and that the fluid, in the fluid sump, can exert no pressure upon the surface that is to be supported, it is possible to equalize or compensate the temperatures at desired areas of the support element and thereby to particularly counter the deformation of the support element.
In order that fluid flows around the support element(s) as fully as possible and to achieve temperature equalization within the entire fluid, it is necessary that the portion of the fluid sump, in the direction of movement of the band-shaped element, located in front of the support element, is connected with the portion of the fluid sump located after the support element, via at least one conduit extending through the support element or extending around the support element, wherein at least two such conduits extend along the carrier.
These connections should therefore have a low resistance to flow. In order, in addition to the temperature compensation of the support element along the carrier, to assure particularly effective temperature compensation also in the direction of movement of the band-shaped element, at least three conduits should be provided along the carrier which preferably have about the same spacing from each other. This spacing between the channels should preferably be in the range from about 10 to 250 mm. In addition, the requirement, that the collected fluid should exert no pressure upon the surface to be supported, permits a very simple construction or shaping of the fluid sump, since, among other things, a compression resistant seal, with respect to the surface to be supported, P13826.TR1 becomes superfluous. In complement thereof, this also eliminates an adulteration of the pressure effect emanating from the support elements.
In case that the fluid sump includes an outlet or drain emanating directly from the roll, the filling of the space, between the band-shaped element and the carrier, with lubricating fluid, can also be avoided. This, in turn, leads to the result that there is no turbulence and thus no heating up of the lubricant.
In order to be able to remove the lubricating fluid from the band-shaped element, scraper arrangements or devices are utilized in the direction of movement of the band-shaped element, after the support element, via which the fluid is conveyed to the fluid sump. If both directions of movement of the band-shaped element are utilized, then corresponding scraper devices are utilized at both ends of the support element. It is of course also possible, in place of the scraper devices, to utilize the support element itself for the removal of the fluid at the inlet gap.
For the control of the fill height of the fluid in the fluid sump, the sump is provided with a controllable outlet.
This permits the influencing of the thermal flow between particular areas of the support element and the collected fluid. In complement thereof, or for only itself, the fluid sump can also utilize a controllable input of temperature controlled, preferably cooled, fluid. This permits not only the influencing of the fluid height but, in a decisive manner the influencing of the temperature of the fluid. Herewith, the criteria for the control of the input and outlet are the fill height and/or the temperature of the fluid.
215143~
P13826.TR1 In addition to the connecting conduits through or around the support elements, naturally other components for promoting the circulation of the fluid can be utilized. In this connection, it, for example, an advantage, if the inlets and outlets are placed or located in differing sides of the fluid sump, this placement alone already providing circulation of the fluid through the conduits of the support element.
This invention finds utility not only with flexible band-shaped elements, which, for example, are used for forming relatively long press gaps, but also with rolls in which the band-shaped element takes the form of a relatively rigid roll covering.
Particularly then when the support element is movable with respect to the carrier, it is advantageous when the scraper device and/or at least the side walls of the fluid sump are connected with the support element and are movable therewith in the direction of the band-shaped element.
Therewith, a deflection of the carrier can be compensated relative to the band-shaped element. In the implementation of this feature it is possible, for example, to attach the entire fluid sump at the support element or to arrange the side walls to be movably sealed relative to the bottom of the fluid sump.
The invention will be described in more detail hereinafter with the aid of two embodiments. The accompanying drawings show:
Fig. 1 is an embodiment utilizing a flexible band-shaped element; and Fig. 2 is a further embodiment with a roll having a relatively rigid roll covering or jacket.
215143~
P13826.TR1 Fig. 1 sets forth a first embodiment, wherein a support element 1 is provided with hydrodynamic lubrication of the support area or surface 2, for supporting an endless, band-shaped or formed flexible element 3 with respect to a carrier 4 fixed in a support. It is of course possible that the support area, in addition, can also utilize bearing pockets for hydrostatic lubrication. Element 3 has, therefore, the approximate shape of a tube or hose and moves around or about carrier 4. Element 3 can be closed at the sides of the tube or hose so that escape of the lubricating fluid into other regions of the machine or onto material web 17 is prevented.
Support element 1 forms a concave contact pressure surface, which is pressed against a cylindrical roll 16. Such an elongated press gap is particularly well suited to the dehydration of fiber webs.
Since the support is accomplished via a directional component acting predominantly in opposition to the force of gravity, it is possible that the fluid, exiting from the gap between support surface 2 of support element 1 and the facing side of band-shaped element 3, need not be forcibly sealed with respect to band-formed element 3. In the subject example, the addition of fluid is accomplished via a lubricating device 18, affixed at the inlet gap of support element 1, thereby assuring hydrodynamic lubrication.
The support function can be accomplished via several support elements arranged along carrier 4 or via a single support element 1, in the form of a support ledge or strip, extending over the entire width of the material web 17 that is to be treated. In every instance however, each support element 1, either alone or in combination with other support 2151~3~
P13826.TR1 elements, is located in a fluid sump 5, whose open side is directed or faces the surface of the band-shaped element 3 that is to be supported. In order to most comprehensively and uniformly influence support element 1, the portion of the fluid sump, in the direction of the movement of band-shaped element 3, located in front of the support element 1, is connected with the portion of the fluid sump 5 located after the support element 1, via at least one conduit 7 extending around the support element 1.
In order to be able to obtain the desired thermal effect, the collected fluid must be in good thermally conductive communication with the portion(s) of support element 1 that is otherwise stressed in a thermally undesired manner. In this instance, among other things, the achievable fluid height, within fluid sump 5, is also of importance. The fluid height can be limited via an overflow into the space between band-formed element 3 and carrier 4. If this is not desired, due to turbulence losses, it is suggested to utilize a drain 9, extending directly from the apparatus, in the manner shown in Fig. 2.
In order to channel the largest possible portion of the lubricating fluid into fluid sump 5, a scraper apparatus or wiper device is located in the direction of movement of band-shaped element 3, after support element 1.
Fig. 2 shows an embodiment wherein band-shaped element 3 takes the form of a roll jacket or covering of a roll, wherein the roll jacket rotates around a fixed carrier 4. This roll forms, together with oppositely located roll 16, a treating gap for a material web 17, as for example, occurs during the smoothing of fiber webs.
215143~
P13826.TRl In distinction relative to the first embodiment, the lubrication here occurs between band-shaped element 3 and support surface 2 of support element 1, in a hydrostatic manner, that is via the addition of fluid from the surge chamber in the bearing pockets of support surface 2 of support element 1. Generally, in such constructions, several support elements are located adjacently to each other along carrier 4 which of course is also possible in the direction of movement of band-shaped element 3.
Since the support here is also accomplished via a directional component acting predominately in opposition to the force of gravity, the overflowing lubricating fluid of support element 1 can readily be collected in one or more fluid sumps 5. In the event that the support is accomplished in a different direction, sealing of fluid sump 5, relative to band-shaped element 3, may be required. In this example, at least several, if not all, support elements 1 should be situated in a fluid sump 5, whose open side faces the surface of the band-shaped element 3 that is to be supported. This fluid sump is so designed or constructed that the fluid in the fluid sump is in good thermally conductive communication with the portions of the support element 1 that are otherwise stressed in a thermally undesired manner. At the same time, the portion of the fluid sump 5, in the direction of movement of band-shaped element 3, located in front of the support element 1, is connected with the portion of the fluid sump 5 located after the support elements 1 via conduits 7 extending through the support elements 1. Since there is no preferred direction of movement here, a scraper device is located both before and after the support elements for channelling the fluid of band-shaped element 3 into fluid sump 5. Fluid sump 5, in turn, is so constructed that no pressure is built up 2151~3~
P13826.TR1 therein, that is, that fluid sump 5, if at all, is only correspondingly sealed with respect to the area or surface of the band-shaped element 3, that is to be supported.
In order to be able to influence the height, and thereby be able to influence the heat transmission resistance for desired areas or portions of support elements 1, fluid sump 5 is provided with a drain 9, wherein the amount of drainage can be controlled by valve 13. For augmenting same, supply or inlet 10 for temperature controlled fluid is also provided.
Therewith, not only the fill height of the fluid in fluid sump 5, but also the temperature thereof can be influenced. The supply or feed inlet 10 is fed via a pump 11 which obtains the fluid from a collection reservoir 6. Expediently, drain 9 extends into collection reservoir 6. Also located in supply or feed inlet 10, is a temperature control device 12, which generally cools the fluid provided thereto. Temperature control device 12 can of course, also be provided in other locations of the fluid circuit.
The control of valve 13, of pump 1, and of temperature control device 12, is accomplished via a control unit 14 which in turn is provided with information concerning fill height as well as the temperature of the fluid within fluid sump 5, via a measuring unit 15.
In order to assure adequate circulation of the fluid within fluid sump 5, inlets and outlets are provided with reference to the direction of movement of band-shaped element 3 on different sides of support element 1. It is also possible of course to utilize additional components in the form of nozzles in the inlet or the pump in fluid sump 5 for the controllable conveying or feeding of the fluid circulation 2151~3~
., .
P13826.TR1 with the goal of temperature stabilization of the fluid and thereby also of support elements 1.
Via the control of the temperature level, the temperature of support elements 1 and thereby the temperature of band-shaped elements 3 can also be influenced in axial zonesthereof, which is of particular advantage during the smoothing process. The spacing between channels or conduits 7 should preferably be in the range of between about 10 and 250 mm, which has the general effect that, with the utilization of but a few support elements 1, the conduits predominately extend through support elements 1.
Claims (13)
1. A support element (1) with hydrostatic and/or hydrodynamic lubrication for the support area (2), for supporting an endless, band-shaped element (3), with respect to a fixed carrier (4), wherein the element (3) moves around the carrier (4), therein characterized, that the support element (1) is located by itself or together with other support elements in a fluid sump (5), whose open side faces the surface of band-shaped element (3) that is to be supported and the fluid sump (5) is so shaped that the fluid therein is in good thermally conductive communication with the portion of the support element (1) that is otherwise stressed in a thermally undesired manner, and that fluid, in fluid sump (5), can exert no pressure upon the surface of band-shaped element (3) that is to be supported and the portion of the fluid sump (5), in the direction of movement of the band-shaped element (3), located in front of the support element (1), is connected with the portion of the fluid sump (5) located after the support element (1) via at least one conduit (7) extending through the support element (1) or extending around the support element (1), wherein at least two such conduits (7) extend along the carrier (4).
2. The support element of claim 1, therein characterized, that at least three conduits (7) extend along the carrier (4), with the conduits being preferably spaced from each other about the same distance, which particularly is in the range of between 10 and 250 mm.
3. The support element of claim 1 or 2, therein characterized, that at least one scraper apparatus is located, in the direction of movement of the band-shaped element (3), after the support element (1) for guiding the lubricating fluid from the band-shaped element (3) into the fluid sump (5).
4. The support element of claims 1-3, therein characterized, that with respect to a direction of movement of the band-shaped element (3) a scraper apparatus (8) is located before and after the support element (1).
5. The support element of claims 1-4, therein characterized, that the fluid sump (5) includes a preferably controlled drain (9).
6. The support element of claims 1-5, therein characterized, that the fluid sump (5) is provided with a controllable inlet (10) for a temperature-controlled, preferably cooled, fluid.
7. The support element of claim 5 or 6, therein characterized, that the control of the drain (9) and/or the inlet (10) is accomplished in dependence upon the fill height and/or the temperature of the fluid in the fluid sump (5).
8. The support element of one of claims 1-7, therein characterized, that the fluid sump (5) includes components for promoting the circulation of the fluid.
9. The support element of one of claims 1-8, therein characterized, that the band-shaped element (3) takes the form of a roll jacket of a roll, wherein the roll jacket rotates around the fixed carrier (4).
10. The support element of one of claims 1-8, therein characterized, that the band-shaped element (3) is flexible.
11. The support element of one of claims 1-10, therein characterized, that the scraper apparatus (8) and/or at least the side walls of the fluid sump (5) are fixedly connected with the support element (1) and are moveable therewith in the direction of the band-shaped element.
12. The support element of one of claims 1-11, therein characterized, that the temperature of the fluid in the fluid sump (5) is controllable for affecting the temperatures of the zones of the band-shaped element (3).
13
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19944420104 DE4420104C2 (en) | 1994-06-09 | 1994-06-09 | Support element |
| DEP4420104.4 | 1994-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2151434A1 true CA2151434A1 (en) | 1995-12-10 |
Family
ID=6520135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2151434 Abandoned CA2151434A1 (en) | 1994-06-09 | 1995-06-09 | Support element |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0687824A1 (en) |
| CA (1) | CA2151434A1 (en) |
| DE (1) | DE4420104C2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19616802A1 (en) * | 1996-04-26 | 1997-10-30 | Voith Sulzer Papiermasch Gmbh | Deflection compensation roller |
| DE19623652A1 (en) * | 1996-06-13 | 1997-12-18 | Voith Sulzer Papiermasch Gmbh | Deflection adjustment roller |
| DE19703966A1 (en) * | 1997-02-03 | 1998-08-06 | Voith Sulzer Papiermasch Gmbh | Belt press unit with fluid wiping device and method for operating the belt press unit |
| DE19903843C1 (en) * | 1999-02-01 | 2000-07-06 | Voith Sulzer Papiertech Patent | Roller for a web processing machine has inner supports at the cylinder mantle and scraper lips on levers with a take-off channel for the fluid leading to an offset collection zone |
| FI115790B (en) * | 1999-07-06 | 2005-07-15 | Metso Paper Inc | Method and arrangement for removing oil from a press roll with variable bombing |
| JP2005221027A (en) | 2004-02-06 | 2005-08-18 | Mitsubishi Heavy Ind Ltd | Oil collecting device for roll device |
| FI20065507L (en) * | 2006-08-04 | 2008-02-05 | Metso Paper Inc | Bend compensated roll for a paper/board machine or finishing machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3528333A1 (en) * | 1985-08-07 | 1987-02-19 | Kuesters Eduard | ROLLER |
| DE3832324A1 (en) * | 1988-09-23 | 1990-04-05 | Voith Gmbh J M | LONG GAP PRESS ROLLER |
| DE3925019A1 (en) * | 1989-07-28 | 1991-02-07 | Voith Gmbh J M | Deflection compensating roller for roller presses |
| DE4223715C2 (en) * | 1992-07-18 | 1995-07-20 | Escher Wyss Gmbh | roller |
-
1994
- 1994-06-09 DE DE19944420104 patent/DE4420104C2/en not_active Expired - Fee Related
-
1995
- 1995-06-03 EP EP95108560A patent/EP0687824A1/en not_active Withdrawn
- 1995-06-09 CA CA 2151434 patent/CA2151434A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE4420104A1 (en) | 1995-12-14 |
| DE4420104C2 (en) | 1997-04-24 |
| EP0687824A1 (en) | 1995-12-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |