US20050250632A1 - Controlled deflection roll - Google Patents
Controlled deflection roll Download PDFInfo
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- US20050250632A1 US20050250632A1 US11/122,410 US12241005A US2005250632A1 US 20050250632 A1 US20050250632 A1 US 20050250632A1 US 12241005 A US12241005 A US 12241005A US 2005250632 A1 US2005250632 A1 US 2005250632A1
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- Prior art keywords
- support
- source
- controlled deflection
- deflection roll
- pressure
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- 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
Definitions
- the invention relates to a controlled deflection roll having a revolving roll shell, a yoke which passes axially through the roll shell and is fixed against rotation, and at least one source of support arranged between the yoke and the roll shell.
- the regulation of the pressure of controlled deflection rolls is carried out by means of hydraulic valves, of which a large number of circuit variants exist. These include, inter alia, the variants in which the relevant pressure regulating valves are integrated in the interior of the roll.
- a design of this type has special advantages in the event of dynamic problems during the pressure regulation, since the line lengths between the sources of support and the valves can be minimized. Nevertheless, this design has been implemented only rarely in the past, which can be attributed to the fact that the maintenance of such systems appears to be too complicated and the technology appears to be too temperamental. For example, in the event of a valve failure, the entire roll would have to be dismantled.
- the present invention provides an imporved controlled deflection roll an improved controlled deflection roll in which the aforementioned problems are eliminated.
- the source of support is at least partly operated with an electrorheological fluid (ERF) and/or ferrofluid, of which the viscosity can be varied via an electric or magnetic field.
- EMF electrorheological fluid
- ferrofluid of which the viscosity can be varied via an electric or magnetic field.
- the flow characteristics of the electrorheological fluids (ERF) or ferrofluids can be adjusted continuously and reversibly.
- the ER fluids which are available are in particular silicone oil in which polyurethane particles are dispersed. With increasing electrical voltage or field strength, the apparent viscosity of the ERF in the field increases and the volume flow decreases.
- the characteristics of an electrorheologigal fluid (ERF) or ferrofluid therefore permit, for example, regulation of the pressure of the sources of support which is relatively simple, fast and extremely fail-safe.
- specific damping properties of the source of support can specifically be implemented, or the oscillatory behavior of the roll shell can be influenced in a specific manner.
- the hydraulic pressure can therefore be varied appropriately.
- pressure regulation can be provided.
- the volume flow can also be varied utilizing the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
- EPF electrorheological fluid
- volume flow regulation can be provided.
- damping characteristics of the source of support can also be varied utilizing the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
- EPF electrorheological fluid
- the oscillatory characteristics of the roll shell can be varied appropriately utilizing the field that influences the viscosity of the electrorheological fluid or ferrofluid and the corresponding changes in the pressure chamber of the source of support.
- a plurality of sources of support can be supplied with the electrorheological fluid or ferrofluid via a common supply line, in which the system pressure (for example pump pressure) is maintained.
- system pressure for example pump pressure
- a connecting line is preferably provided in each case, in which there is integrated a throttling point in which an electric conductor, cable or the like is arranged in order to produce the field.
- a pressure sensor connecting directly to the pressure chamber of the source of support is advantageously provided.
- a pressure sensor of this type can then, for example, supply the actual pressure for regulating the hydraulic pressure under the source of support.
- a commercially available pressure sensor can be used.
- the electric controller provided for pressure regulation is preferably arranged outside the roll.
- the mechanical construction of the roll system is simplified considerably.
- the following components can be dispensed with: hydraulic valves, feed lines, quick-action couplings, pipe bundles in the interior of the roll.
- a design with bearing points and gear mechanisms located on the outside should preferably be chosen since, under certain circumstances, no antifriction mounting and gear mechanisms can be lubricated with the polarizable solid particles (diameter about 5 ⁇ m) in the electrorheological fluid or ferrofluid.
- the hydrostatics cope with these particles, since the gaps are approximately 10 times larger.
- the source of support can also be operated in a two-circuit system, in which the electrorheological fluid or ferrofluid is used only for the pressure regulation and the lubrication of the source of support is carried out with conventional oil. If a plurality of sources of support are provided, each source of support is preferably operated in the two-circuit system.
- the ER fluid which is currently still relatively expensive, is therefore used only for the pressure regulation in the present invention, which means that substantially less ER fluid is required.
- the lubrication of the hydrostatic source of support is carried out with conventional oil, for which the oil pockets of the source of support can be supplied with a constant volume flow.
- the latter is preferably produced by means of volume dividers which are connected downstream of the hydraulic pump.
- the supply of the head of the source of support, which can be moved relative to the yoke, can be provided via hose lines.
- any other desired design variants may be used.
- a constant pressure in combination with upstream throttles can be used to supply the head of the source of support. In this example, however, the constant pressure must always be greater than the maximum possible pressure of the source of support in the piston chamber, that is to say the pressure chamber of the source of support.
- the electrorheological fluid or ferrofluid For the regulation of the pressure in the pressure chamber of the source of support, the electrorheological fluid or ferrofluid must flow in a separate circuit, since only when a fluid is flowing is pressure regulation by viscosity change possible. For this reason, in the present invention, in each case a connecting line, in which a throttling point is integrated in order to maintain the pressure in the pressure chamber, is provided between the pressure chamber of a respective source of support and the tank of the ERF or ferrofluid supply.
- the throttling point in the connecting line to the ERF or ferrofluid tank, required to maintain the pressure in the pressure chamber of the source of support, can be designed in a conventional way.
- this throttling point can comprise an aperture stop or a capillary.
- the throttling point can also be capable of control via an electric or magnetic field, and can in turn comprise an electric conductor, cable or the like for producing the field.
- Such a controlled variant has the advantage that the circulation volume flow of a respective source of support can be kept relatively constant irrespective of the pressure.
- the circulating volume flow is approximately proportional to the piston pressure.
- the ERF or ferrofluid effect can also be used to specifically increase the damping characteristics of a respective source of support.
- a voltage to the guide bush of a respective source of support
- the viscosity of the fluid between the guide bush and the yoke can be highly increased locally, which leads to a considerable increase in the viscous damping of a source of support moved relative to the yoke.
- the guide bush in this case should be insulated electrically with respect to the head of the source of support, since otherwise, in the event of mixed friction of the head of the source of support on the rotating roll shell, it is possible for a voltage drop, or short circuit, to occur.
- damping characteristics can likewise be influenced or regulated actively.
- the source of support is assigned a damper, which is supported at one end on the head of the source of support and at the other end on the yoke and contains electrorheological fluid or ferrofluid, via the viscosity of which, which can be influenced by an appropriate field, the damping characteristics of the head of the source of support, which can be moved relative to the yoke, and/or the oscillatory characteristics of the roll shell can be varied.
- the damper can for example comprise a cylinder containing the electrorheological fluid or ferrofluid and a piston arranged in the cylinder, of which the external cross section is smaller than the internal cross section of the cylinder, so that in operation fluid displaced by the piston can pass through the radial region between the piston and the inner side of the cylinder.
- the respective field that influences the viscosity of the electrorheological fluid or ferrofluid can be produced in the radial region between the piston and the inner side of the cylinder.
- the damper is expediently supported on the head of the source of support and on the yoke at one end via its cylinder and at the other end via a piston rod led to the outside from the interior of the cylinder, or vice versa.
- the damper is preferably supported on the head of the source of support and on the yoke via a spherical joint in each case.
- the damper can at least substantially be arranged within the pressure chamber of the source of support.
- the source of support is designed as a ring element.
- the internal space enclosed by the ring element is preferably connected to a discharge line in which a throttling point is integrated, which can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point being variable via an electric or magnetic field.
- the throttling point can, for example, have an electric conductor which is arranged in the discharge line and through which the field can be produced.
- the source of support has at least one annular pocket in its supporting face, the supporting face facing the surface of the shell and, facing the yoke, an annular pressure face which bounds a pressure chamber which is connected firstly to a pressure medium feed line and secondly via a throttle to the pocket.
- a throttling point is advantageously integrated in the pressure medium feed line and can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point being variable via an electric or magnetic field.
- the throttling point can, for example, comprise an electric conductor which is arranged in the pressure medium feed line and via which the field can be produced.
- the annular pocket is expediently subdivided by transverse webs and each pocket section is connected to the pressure chamber via a throttle.
- a pressure sensor connected directly to the pressure chamber of the source of support is advantageously provided.
- a pressure sensor connected directly to the internal space can also expediently be provided.
- the ring element forming the source of support can in particular be designed and operated in the manner as described in the documents DE 44 29 499 C1 and DE 195 40 791 C1.
- viscosity of a respective electrorheological fluid can generally be varied via an electric field or an electric voltage
- the viscosity can be varied by connecting an appropriate magnetic field
- FIG. 1 shows a partial cross-section of an embodiment of a controlled deflection roll, in which the source of support is operated exclusively with the electrorheological fluid or ferrofluid;
- FIG. 2 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the source of support is operated in a two-circuit system
- FIG. 3 shows the controlled deflection roll according to FIG. 2 , in which the throttling point comprises an electric conductor;
- FIG. 4 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the viscous damping of the source of support moved relative to the yoke can be varied;
- FIG. 5 shows an enlarged illustration of a detail from FIG. 4 .
- FIG. 6 shows a partial cross-section of a further embodiment of the controlled deflection roll with a damper assigned to the source of support, supported at one end on the head of the source of support and at the other end on the yoke;
- FIG. 7 shows an enlarged illustration of a detail from FIG. 6 ;
- FIG. 8 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the source of support is designed as a ring element, and
- FIG. 9 shows an embodiment comparable with the embodiment according to FIG. 8 but, in addition to the pressure sensor connected to the pressure chamber, a pressure sensor connected to the internal space is additionally also provided.
- FIG. 1 shows schematically a controlled deflection roll 10 , which comprises a revolving roll shell 12 , a yoke 14 which passes axially through the roll shell 12 and is fixed against rotation, and at least one source of support 16 arranged between the yoke 14 and the roll shell 12 .
- the source of support 16 is operated with an electrorheological fluid (ERF) or ferrofluid, of which the viscosity can be varied via an electric or magnetic field.
- ERP electrorheological fluid
- ferrofluid of which the viscosity can be varied via an electric or magnetic field.
- the hydraulic pressure in particular can be varied, making it possible to regulate the pressure.
- a plurality, preferably all, of the sources of support 16 are supplied with the electrorheological fluid (ERF) or ferrofluid via a common supply line 18 , in which the system pressure, for example pump pressure, is maintained.
- a connecting line 22 is provided between the pressure chamber 20 of a respective source of support 16 and the common supply line 18 .
- a connecting line 22 is provided between the pressure chamber 20 of a respective source of support 16 and the common supply line 18 .
- a throttling point 24 Integrated into this connecting line 22 is a throttling point 24 , in which an electric conductor 26 , a coil or the like is arranged in order to produce the field.
- a pressure sensor 28 connected directly to the pressure chamber 20 of the source of support 16 is provided.
- the electric controller provided for the pressure regulation is preferably arranged outside the roll 10 .
- each source of support 16 is preferably operated exclusively with the electrorheological fluid (ERF) or ferrofluid.
- the pressure supply is provided by the common supply line 18 for all the sources of support or supporting elements 16 , in which line the system pressure, for example pump pressure, is maintained.
- a throttling point 24 Integrated in the connecting line 22 to the pressure chamber 20 of a respective source of support 16 is a throttling point 24 , in which the relevant field can be built up by means of the electric conductor 26 , coil or the like.
- an electric field is produced or a voltage is applied, which means that here the viscosity of an electrorheological fluid (ERF) is influenced appropriately.
- EMF electrorheological fluid
- use can also be made of a ferrofluid, of which the viscosity can then be influenced appropriately via an appropriate magnetic field.
- the actual pressure is measured by the pressure sensor 28 , which can be a commercially available pressure sensor.
- the pressure sensor 28 can be a commercially available pressure sensor.
- the throttling point for example with insulated voltage connection, two cables and a pressure sensor 28 are therefore required in the interior of the controlled deflection roll 10 .
- FIG. 2 shows schematically an embodiment of the controlled deflection roll 10 in which at least one, preferably all the supporting sources 16 are operated in a two-circuit system.
- the electrorheological fluid (ERF) or ferrofluid is used for pressure regulation, while the lubrication of a respective source of support 16 is carried out with conventional oil.
- the electrorheological fluid (ERF) or ferrofluid which is currently still relatively expensive, is therefore used primarily for the pressure regulation, which means that less ER fluid or ferrofluid is required.
- the oil pockets 30 of the source of support 16 are supplied with a constant volume flow.
- the latter is preferably produced by means of volume dividers which are connected downstream of the hydraulic pump.
- the supply of the head of the source of support, which can be moved relative to the yoke 14 can be provided via hose lines.
- a constant pressure in combination with upstream throttles can be used to supply the head of the source of support. In this case, however the constant pressure must always be greater than the maximum possible pressure of the source of support in the pressure chamber 20 of the source of support 16 .
- a connecting line 32 in which a throttling point 34 is integrated in order to maintain the pressure in the pressure chamber 20 , is provided between the pressure chamber 20 of a respective source of support 16 and the tank of the ERF or ferrofluid supply.
- the throttling point 34 that maintains the piston pressure in the connecting line 32 can be designed in a conventional way and, for example, can be formed by an aperture stop or capillary.
- FIG. 4 shows schematically a further embodiment of the controlled deflection roll 10 , in which the viscous damping of the source of support 16 , which can be moved relative to the yoke 14 , can be varied.
- FIG. 5 shows an enlarged illustration of a detail from FIG. 4 .
- the viscous damping of the source of support which is moved relative to the yoke 14 , can be varied via the viscosity of the electrorheological fluid (ERF) or ferrofluid between the guide bush 36 of the source of support 16 and the yoke 14 .
- EMF electrorheological fluid
- the ERF or ferrofluid effect can therefore be used to specifically increase the damping characteristics of the source of support 16 .
- the viscosity of the fluid between the guide bush 36 and the yoke 14 can be highly increased locally, which leads to a considerable increase in the viscous damping of the source of support 16 moved relative to the yoke 14 .
- the guide bush 36 in this case should be insulated electrically with respect to the head of the source of support, since otherwise, in the event of mixed friction of the head of the source of support on the rotating roll shell 12 , it is possible for a voltage drop or short circuit to occur. These damping characteristics can likewise be regulated actively.
- FIG. 6 shows schematically another embodiment of the controlled deflection roll 10 , in which the source of support 16 is assigned a damper 38 , which is supported at one end on the head 16 ′ of the source of support and at the other end on the yoke 14 .
- the damper 38 contains electrorheological fluid or ferrofluid, in which the viscosity can be influenced by an appropriate field, the damping characteristics of the head 16 ′ of the source of support, which can be moved relative to the yoke 14 , and/or the oscillatory characteristics of the roll shell 12 can be varied.
- the damper 38 comprises a cylinder 40 containing the electrorheological fluid or ferrofluid and a piston 42 arranged in the cylinder 40 .
- the external cross section of the piston 42 is smaller than the internal cross section of the cylinder 40 , so that in operation fluid displaced by the piston 42 can pass through the radial region between the piston 42 and the inner side of the cylinder.
- a voltage U can, for example, be applied between the piston 42 and the cylinder 38 in the manner illustrated in FIG. 7 and can then be varied appropriately.
- the damper 38 is supported on the head 16 ′ of the source of support and on the yoke 14 at one end via its cylinder 40 and at the other end via a piston rod 44 led to the outside from the interior of the cylinder 40 .
- an embodiment in which the damper 38 is supported on the head 16 ′ of the source of support via the piston rod and is supported on the yoke 14 via the cylinder 40 is also conceivable.
- the damper 38 is supported on the head 16 ′ of the source of support and on the yoke 14 via a spherical joint 46 in each case.
- the damper 38 is at least substantially arranged within the pressure chamber 20 of the source of support 16 .
- FIG. 8 shows a further embodiment of the controlled deflection roll 10 , in which the source of support 16 is designed as a ring element.
- the internal space 48 enclosed by the ring element is connected to a discharge line 50 , in which a throttling point 52 is integrated.
- the throttling point can be variably adjusted by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point 52 being variable due to an electric or magnetic field.
- the throttling point 52 comprises an electric conductor 26 which is arranged in the discharge line 50 and via which the field can be produced. For example, a voltage U 2 can be applied to this conductor and can then be variably adjusted in an appropriate manner.
- the source of support 16 has at least one annular pocket 58 in its supporting face 56 facing the inner surface 54 of the shell, and an annular pressure face 60 facing the yoke 14 .
- the pressure face 60 bounds a pressure chamber 20 , which is connected firstly to a pressure medium feed line 62 and secondly via a throttle 64 to the pocket 58 .
- a throttling point 66 Integrated in the pressure medium feed line 62 is a throttling point 66 , which can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point 66 being variable via an electric or magnetic field.
- the throttling point 66 in the present case comprises, for example, an electric conductor 68 which is arranged in the pressure medium feed line 62 and via which the field can be produced.
- a voltage U 1 which can be varied appropriately can be applied to the electric conductor 68 .
- each pocket section can be connected to the pressure chamber 20 via a throttle 64 .
- the present exemplary embodiment provides a pressure sensor 70 connected directly to the pressure chamber 20 of the source of support 16 .
- FIG. 9 shows an embodiment comparable with FIG. 8 but in which, in addition to the pressure sensor 70 connected directly to the pressure chamber 20 , a pressure sensor 72 connected to the internal space 48 is also provided.
- the ring element forming the source of support 16 can be designed and operated in the manner as described in the documents DE 44 29 499 C1 and DE 195 40 791 C1.
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Prevention Devices (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
A controlled deflection roll has a revolving roll shell, a yoke which passes axially through the roll shell and is fixed against rotation, and at least one source of support arranged between the yoke and the roll shell. The source of support is at least partly operated with one of an electrorheological fluid (ERF) and a ferrofluid. The viscosity of the ERF and the ferrofluid can be varied using an electric field or a magnetic field.
Description
- The present application claims priority under 35 U.S.C. § 119 of German Patent Application No. 10 2004 022 3777, filed on May 6, 2004, the disclosure of which is expressly incorporated by reference herin in their entireties.
- 1. Field of the Invention
- The invention relates to a controlled deflection roll having a revolving roll shell, a yoke which passes axially through the roll shell and is fixed against rotation, and at least one source of support arranged between the yoke and the roll shell.
- 2. Discussion of the Background Information
- The regulation of the pressure of controlled deflection rolls is carried out by means of hydraulic valves, of which a large number of circuit variants exist. These include, inter alia, the variants in which the relevant pressure regulating valves are integrated in the interior of the roll. In contrast with positioning outside the roll, a design of this type has special advantages in the event of dynamic problems during the pressure regulation, since the line lengths between the sources of support and the valves can be minimized. Nevertheless, this design has been implemented only rarely in the past, which can be attributed to the fact that the maintenance of such systems appears to be too complicated and the technology appears to be too temperamental. For example, in the event of a valve failure, the entire roll would have to be dismantled.
- The present invention provides an imporved controlled deflection roll an improved controlled deflection roll in which the aforementioned problems are eliminated.
- According to the present invention, the source of support is at least partly operated with an electrorheological fluid (ERF) and/or ferrofluid, of which the viscosity can be varied via an electric or magnetic field.
- According to the present invention, use is therefore made of the flow characteristics or viscosity of an electrorheological fluid or ferrofluid change under the influence of an electric or magnetic field, for example, a hydraulic pressure or a volume flow can be varied by changing the relevant field.
- Under the influence of the relevant field, the flow characteristics of the electrorheological fluids (ERF) or ferrofluids can be adjusted continuously and reversibly. The ER fluids which are available are in particular silicone oil in which polyurethane particles are dispersed. With increasing electrical voltage or field strength, the apparent viscosity of the ERF in the field increases and the volume flow decreases. The characteristics of an electrorheologigal fluid (ERF) or ferrofluid therefore permit, for example, regulation of the pressure of the sources of support which is relatively simple, fast and extremely fail-safe. In addition, specific damping properties of the source of support can specifically be implemented, or the oscillatory behavior of the roll shell can be influenced in a specific manner.
- Utilizing the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid, for example the hydraulic pressure can therefore be varied appropriately. In particular, it is therefore possible to vary the pressure in the pressure chamber of a respective source of support. In this example, pressure regulation can be provided.
- The volume flow can also be varied utilizing the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid. In this example, volume flow regulation can be provided.
- Furthermore, the damping characteristics of the source of support can also be varied utilizing the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
- In another embodiment of the controlled deflection roll according to the present invention, the oscillatory characteristics of the roll shell can be varied appropriately utilizing the field that influences the viscosity of the electrorheological fluid or ferrofluid and the corresponding changes in the pressure chamber of the source of support.
- Designs of the controlled deflection roll in which the source of support is operated exclusively with the electrorheological fluid or ferrofluid are possible.
- In this example, a plurality of sources of support can be supplied with the electrorheological fluid or ferrofluid via a common supply line, in which the system pressure (for example pump pressure) is maintained.
- Between the pressure chamber of the respective source of support and the common supply line, a connecting line is preferably provided in each case, in which there is integrated a throttling point in which an electric conductor, cable or the like is arranged in order to produce the field.
- A pressure sensor connecting directly to the pressure chamber of the source of support is advantageously provided. A pressure sensor of this type can then, for example, supply the actual pressure for regulating the hydraulic pressure under the source of support. In general, a commercially available pressure sensor can be used.
- In the preferred embodiment, for the pressure regulation of a source of support, only the throttling point with insulated voltage connection, two cables or conductors and a pressure sensor are thus required in the interior of the roll.
- Additionally, the electric controller provided for pressure regulation is preferably arranged outside the roll.
- Since only one hydraulic feed line is required in the preferred embodiment, the mechanical construction of the roll system is simplified considerably. Thus, as compared with a conventional construction having a plurality of adjusting zones, the following components can be dispensed with: hydraulic valves, feed lines, quick-action couplings, pipe bundles in the interior of the roll.
- In the example of the present roll construction, a design with bearing points and gear mechanisms located on the outside should preferably be chosen since, under certain circumstances, no antifriction mounting and gear mechanisms can be lubricated with the polarizable solid particles (diameter about 5 μm) in the electrorheological fluid or ferrofluid. The hydrostatics cope with these particles, since the gaps are approximately 10 times larger.
- Alternatively, however, the source of support can also be operated in a two-circuit system, in which the electrorheological fluid or ferrofluid is used only for the pressure regulation and the lubrication of the source of support is carried out with conventional oil. If a plurality of sources of support are provided, each source of support is preferably operated in the two-circuit system.
- The ER fluid, which is currently still relatively expensive, is therefore used only for the pressure regulation in the present invention, which means that substantially less ER fluid is required. The lubrication of the hydrostatic source of support is carried out with conventional oil, for which the oil pockets of the source of support can be supplied with a constant volume flow. The latter is preferably produced by means of volume dividers which are connected downstream of the hydraulic pump. The supply of the head of the source of support, which can be moved relative to the yoke, can be provided via hose lines. Generally, any other desired design variants may be used. Likewise, a constant pressure in combination with upstream throttles can be used to supply the head of the source of support. In this example, however, the constant pressure must always be greater than the maximum possible pressure of the source of support in the piston chamber, that is to say the pressure chamber of the source of support.
- For the regulation of the pressure in the pressure chamber of the source of support, the electrorheological fluid or ferrofluid must flow in a separate circuit, since only when a fluid is flowing is pressure regulation by viscosity change possible. For this reason, in the present invention, in each case a connecting line, in which a throttling point is integrated in order to maintain the pressure in the pressure chamber, is provided between the pressure chamber of a respective source of support and the tank of the ERF or ferrofluid supply.
- The throttling point in the connecting line to the ERF or ferrofluid tank, required to maintain the pressure in the pressure chamber of the source of support, can be designed in a conventional way. Thus, for example, this throttling point can comprise an aperture stop or a capillary.
- However, the throttling point can also be capable of control via an electric or magnetic field, and can in turn comprise an electric conductor, cable or the like for producing the field. Such a controlled variant has the advantage that the circulation volume flow of a respective source of support can be kept relatively constant irrespective of the pressure. In the case of the technically simpler variant mentioned previously, in which the throttling is carried out via capillaries or throttling points and in which the source of support is operated exclusively with the electrorheological fluid or ferrofluid, the circulating volume flow is approximately proportional to the piston pressure.
- All the design variants permit very fast pressure regulation, since no connecting line is connected between the actuating element (a throttle which can be controlled electrically in the region of one millisecond by means of viscosity change) and the pressure chamber of the source of support. In the case of an oscillating roll shell, the pressure change can be regulated so quickly that it is possible to exert an active influence on the oscillation.
- As already mentioned, the ERF or ferrofluid effect can also be used to specifically increase the damping characteristics of a respective source of support. For example, by connecting a voltage to the guide bush of a respective source of support, the viscosity of the fluid between the guide bush and the yoke can be highly increased locally, which leads to a considerable increase in the viscous damping of a source of support moved relative to the yoke. The guide bush in this case should be insulated electrically with respect to the head of the source of support, since otherwise, in the event of mixed friction of the head of the source of support on the rotating roll shell, it is possible for a voltage drop, or short circuit, to occur. These damping characteristics can likewise be influenced or regulated actively.
- In another embodiment of the controlled deflection roll according to the invention, the source of support is assigned a damper, which is supported at one end on the head of the source of support and at the other end on the yoke and contains electrorheological fluid or ferrofluid, via the viscosity of which, which can be influenced by an appropriate field, the damping characteristics of the head of the source of support, which can be moved relative to the yoke, and/or the oscillatory characteristics of the roll shell can be varied.
- In this embodiment, the damper can for example comprise a cylinder containing the electrorheological fluid or ferrofluid and a piston arranged in the cylinder, of which the external cross section is smaller than the internal cross section of the cylinder, so that in operation fluid displaced by the piston can pass through the radial region between the piston and the inner side of the cylinder. The respective field that influences the viscosity of the electrorheological fluid or ferrofluid can be produced in the radial region between the piston and the inner side of the cylinder.
- The damper is expediently supported on the head of the source of support and on the yoke at one end via its cylinder and at the other end via a piston rod led to the outside from the interior of the cylinder, or vice versa.
- The damper is preferably supported on the head of the source of support and on the yoke via a spherical joint in each case.
- The damper can at least substantially be arranged within the pressure chamber of the source of support.
- In another embodiment of the controlled deflection roll according to the invention, the source of support is designed as a ring element.
- In this case, the internal space enclosed by the ring element is preferably connected to a discharge line in which a throttling point is integrated, which can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point being variable via an electric or magnetic field. In this case, the throttling point can, for example, have an electric conductor which is arranged in the discharge line and through which the field can be produced.
- In an the embodiment, the source of support has at least one annular pocket in its supporting face, the supporting face facing the surface of the shell and, facing the yoke, an annular pressure face which bounds a pressure chamber which is connected firstly to a pressure medium feed line and secondly via a throttle to the pocket.
- In this example, a throttling point is advantageously integrated in the pressure medium feed line and can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through this throttling point being variable via an electric or magnetic field. The throttling point can, for example, comprise an electric conductor which is arranged in the pressure medium feed line and via which the field can be produced.
- The annular pocket is expediently subdivided by transverse webs and each pocket section is connected to the pressure chamber via a throttle.
- A pressure sensor connected directly to the pressure chamber of the source of support is advantageously provided.
- A pressure sensor connected directly to the internal space can also expediently be provided.
- The ring element forming the source of support can in particular be designed and operated in the manner as described in the
documents DE 44 29 499 C1 and DE 195 40 791 C1. - While the viscosity of a respective electrorheological fluid can generally be varied via an electric field or an electric voltage, in the ferrofluids which can likewise be used the viscosity can be varied by connecting an appropriate magnetic field.
- The invention will be explained in more detail in the following text using exemplary embodiments and with reference to the accompanying drawing.
- The present invention is further described in the detialed description which follows, in reference to the noted drawing by way of non-limiting example of exemplary embodiment of the present invention, and wherein:
-
FIG. 1 shows a partial cross-section of an embodiment of a controlled deflection roll, in which the source of support is operated exclusively with the electrorheological fluid or ferrofluid; -
FIG. 2 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the source of support is operated in a two-circuit system, -
FIG. 3 shows the controlled deflection roll according toFIG. 2 , in which the throttling point comprises an electric conductor; -
FIG. 4 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the viscous damping of the source of support moved relative to the yoke can be varied; -
FIG. 5 shows an enlarged illustration of a detail fromFIG. 4 , -
FIG. 6 shows a partial cross-section of a further embodiment of the controlled deflection roll with a damper assigned to the source of support, supported at one end on the head of the source of support and at the other end on the yoke; -
FIG. 7 shows an enlarged illustration of a detail fromFIG. 6 ; -
FIG. 8 shows a partial cross-section of a further embodiment of the controlled deflection roll, in which the source of support is designed as a ring element, and -
FIG. 9 shows an embodiment comparable with the embodiment according toFIG. 8 but, in addition to the pressure sensor connected to the pressure chamber, a pressure sensor connected to the internal space is additionally also provided. - The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.
-
FIG. 1 shows schematically a controlleddeflection roll 10, which comprises a revolvingroll shell 12, ayoke 14 which passes axially through theroll shell 12 and is fixed against rotation, and at least one source ofsupport 16 arranged between theyoke 14 and theroll shell 12. - The source of
support 16 is operated with an electrorheological fluid (ERF) or ferrofluid, of which the viscosity can be varied via an electric or magnetic field. - Use of the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid, the hydraulic pressure in particular can be varied, making it possible to regulate the pressure. A plurality, preferably all, of the sources of
support 16 are supplied with the electrorheological fluid (ERF) or ferrofluid via acommon supply line 18, in which the system pressure, for example pump pressure, is maintained. - Between the
pressure chamber 20 of a respective source ofsupport 16 and thecommon supply line 18, a connectingline 22 is provided. Integrated into this connectingline 22 is athrottling point 24, in which anelectric conductor 26, a coil or the like is arranged in order to produce the field. - In addition, a
pressure sensor 28 connected directly to thepressure chamber 20 of the source ofsupport 16 is provided. - The electric controller provided for the pressure regulation is preferably arranged outside the
roll 10. - In the preferred embodiment, therefore, each source of
support 16 is preferably operated exclusively with the electrorheological fluid (ERF) or ferrofluid. The pressure supply is provided by thecommon supply line 18 for all the sources of support or supportingelements 16, in which line the system pressure, for example pump pressure, is maintained. Integrated in the connectingline 22 to thepressure chamber 20 of a respective source ofsupport 16 is athrottling point 24, in which the relevant field can be built up by means of theelectric conductor 26, coil or the like. Here an electric field is produced or a voltage is applied, which means that here the viscosity of an electrorheological fluid (ERF) is influenced appropriately. As discussed, use can also be made of a ferrofluid, of which the viscosity can then be influenced appropriately via an appropriate magnetic field. - In order to regulate the hydraulic pressure under the source of
support 16, the actual pressure is measured by thepressure sensor 28, which can be a commercially available pressure sensor. For the pressure regulation of a source ofsupport 16, only the throttling point, for example with insulated voltage connection, two cables and apressure sensor 28 are therefore required in the interior of the controlleddeflection roll 10. -
FIG. 2 shows schematically an embodiment of the controlled deflection roll 10 in which at least one, preferably all the supportingsources 16 are operated in a two-circuit system. In such a two-circuit system, the electrorheological fluid (ERF) or ferrofluid is used for pressure regulation, while the lubrication of a respective source ofsupport 16 is carried out with conventional oil. - The electrorheological fluid (ERF) or ferrofluid, which is currently still relatively expensive, is therefore used primarily for the pressure regulation, which means that less ER fluid or ferrofluid is required. In order to lubricate the hydrostatic source of
support 16, the oil pockets 30 of the source ofsupport 16 are supplied with a constant volume flow. The latter is preferably produced by means of volume dividers which are connected downstream of the hydraulic pump. The supply of the head of the source of support, which can be moved relative to theyoke 14, can be provided via hose lines. Other design variants are also conceivable. Likewise, a constant pressure in combination with upstream throttles can be used to supply the head of the source of support. In this case, however the constant pressure must always be greater than the maximum possible pressure of the source of support in thepressure chamber 20 of the source ofsupport 16. - For the pressure regulation in the
pressure chamber 20 of the source ofsupport 16, the fluid must flow in a separate circuit, since only when a fluid is flowing is pressure regulation by viscosity change possible. For this reason, in the present embodiment, in each case a connectingline 32, in which athrottling point 34 is integrated in order to maintain the pressure in thepressure chamber 20, is provided between thepressure chamber 20 of a respective source ofsupport 16 and the tank of the ERF or ferrofluid supply. - The
throttling point 34 that maintains the piston pressure in the connectingline 32 can be designed in a conventional way and, for example, can be formed by an aperture stop or capillary. - However, with respect to this
throttling point 34 as well, in principle an electrically or magnetically controlled variant is also conceivable. A corresponding embodiment is reproduced inFIG. 3 , in which therelevant throttling point 34 again comprises, for example, anelectric conductor 26, cable, coil or the like. Such a controlled variant has the advantage that the circulation volume flow of a respective source ofsupport 16 can be kept relatively constant irrespective of the pressure. In the technically simpler embodiment according toFIG. 2 , the circulating volume flow is approximately proportional to the piston pressure. -
FIG. 4 shows schematically a further embodiment of the controlleddeflection roll 10, in which the viscous damping of the source ofsupport 16, which can be moved relative to theyoke 14, can be varied.FIG. 5 shows an enlarged illustration of a detail fromFIG. 4 . - Here, the viscous damping of the source of support, which is moved relative to the
yoke 14, can be varied via the viscosity of the electrorheological fluid (ERF) or ferrofluid between theguide bush 36 of the source ofsupport 16 and theyoke 14. - The ERF or ferrofluid effect can therefore be used to specifically increase the damping characteristics of the source of
support 16. By connecting a voltage to theguide bush 36 of the source ofsupport 16, the viscosity of the fluid between theguide bush 36 and theyoke 14 can be highly increased locally, which leads to a considerable increase in the viscous damping of the source ofsupport 16 moved relative to theyoke 14. - The
guide bush 36 in this case should be insulated electrically with respect to the head of the source of support, since otherwise, in the event of mixed friction of the head of the source of support on therotating roll shell 12, it is possible for a voltage drop or short circuit to occur. These damping characteristics can likewise be regulated actively. -
FIG. 6 shows schematically another embodiment of the controlleddeflection roll 10, in which the source ofsupport 16 is assigned adamper 38, which is supported at one end on thehead 16′ of the source of support and at the other end on theyoke 14. - The
damper 38 contains electrorheological fluid or ferrofluid, in which the viscosity can be influenced by an appropriate field, the damping characteristics of thehead 16′ of the source of support, which can be moved relative to theyoke 14, and/or the oscillatory characteristics of theroll shell 12 can be varied. In the present exemplary embodiment, thedamper 38 comprises acylinder 40 containing the electrorheological fluid or ferrofluid and apiston 42 arranged in thecylinder 40. The external cross section of thepiston 42 is smaller than the internal cross section of thecylinder 40, so that in operation fluid displaced by thepiston 42 can pass through the radial region between thepiston 42 and the inner side of the cylinder. - The respective field influencing the viscosity of the electrorheological fluid or ferrofluid is produced in the radial region between the
piston 42 and the inner side of the cylinder. In this case, a voltage U can, for example, be applied between thepiston 42 and thecylinder 38 in the manner illustrated inFIG. 7 and can then be varied appropriately. - The
damper 38 is supported on thehead 16′ of the source of support and on theyoke 14 at one end via itscylinder 40 and at the other end via apiston rod 44 led to the outside from the interior of thecylinder 40. In principle, an embodiment in which thedamper 38 is supported on thehead 16′ of the source of support via the piston rod and is supported on theyoke 14 via thecylinder 40 is also conceivable. - In the present exemplary embodiment, the
damper 38 is supported on thehead 16′ of the source of support and on theyoke 14 via a spherical joint 46 in each case. - As can be seen from
FIGS. 6 and 7 , thedamper 38 is at least substantially arranged within thepressure chamber 20 of the source ofsupport 16. -
FIG. 8 shows a further embodiment of the controlleddeflection roll 10, in which the source ofsupport 16 is designed as a ring element. - In this embodiment, the
internal space 48 enclosed by the ring element is connected to adischarge line 50, in which athrottling point 52 is integrated. The throttling point can be variably adjusted by the viscosity of an electrorheological fluid or ferrofluid flowing through thisthrottling point 52 being variable due to an electric or magnetic field. Thethrottling point 52 comprises anelectric conductor 26 which is arranged in thedischarge line 50 and via which the field can be produced. For example, a voltage U2 can be applied to this conductor and can then be variably adjusted in an appropriate manner. - The source of
support 16 has at least oneannular pocket 58 in its supportingface 56 facing theinner surface 54 of the shell, and an annular pressure face 60 facing theyoke 14. The pressure face 60 bounds apressure chamber 20, which is connected firstly to a pressuremedium feed line 62 and secondly via athrottle 64 to thepocket 58. - Integrated in the pressure
medium feed line 62 is athrottling point 66, which can be adjusted variably by the viscosity of an electrorheological fluid or ferrofluid flowing through thisthrottling point 66 being variable via an electric or magnetic field. - As can be seen from
FIG. 8 , thethrottling point 66 in the present case comprises, for example, anelectric conductor 68 which is arranged in the pressuremedium feed line 62 and via which the field can be produced. - By way of example, a voltage U1 which can be varied appropriately can be applied to the
electric conductor 68. - The
annular pocket 58 is expediently subdivided by transverse webs. In this case each pocket section can be connected to thepressure chamber 20 via athrottle 64. - Additionally, the present exemplary embodiment provides a
pressure sensor 70 connected directly to thepressure chamber 20 of the source ofsupport 16. -
FIG. 9 shows an embodiment comparable withFIG. 8 but in which, in addition to thepressure sensor 70 connected directly to thepressure chamber 20, a pressure sensor 72 connected to theinternal space 48 is also provided. - Additionally, the ring element forming the source of
support 16 can be designed and operated in the manner as described in thedocuments DE 44 29 499 C1 and DE 195 40 791 C1. - It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in now ay to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, withour departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to paticular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.
- Voith Paper Patent GmbH V 10016PEP—Ku/ho
-
-
- 10 Controlled deflection roll
- 12 Roll shell
- 14 Yoke
- 16 Source of support
- 16′ Head of source of support
- 18 Common supply line
- 20 Pressure chamber
- 22 Connecting line
- 24 Throttling point
- 26 Electric line
- 28 Pressure sensor
- 30 Oil pocket
- 32 Connecting line
- 34 Throttling point
- 36 Guide bush
- 38 Damper
- 40 Cylinder
- 42 Piston
- 44 Piston rod
- 46 Spherical joint
- 48 Internal space
- 50 Discharge line
- 52 Throttling point
- 54 Inner surface of shell
- 56 Supporting face
- 58 Annular pocket
- 60 Annular pressure face
- 62 Pressure medium feed line
- 64 Throttle
- 66 Throttling point
- 68 Electric conductor
- 70 Pressure sensor
- 72 Pressure sensor
Claims (34)
1. A controlled deflection roll having a revolving roll shell, a yoke which passes axially through the roll shell and is fixed against rotation, and at least one source of support arranged between the yoke and the roll shell,
wherein
the source of support is at least partly operated with at least one of an electrorheological fluid (ERF) and a ferrofluid, of which the viscosity is variable utilizing at least one of an electric field and a magnetic field.
2. The controlled deflection roll of claim 1 , wherein the hydraulic pressure can be varied via the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
3. The controlled deflection roll of claim 2 , further comprising a pressure regulator.
4. The controlled deflection roll of claim 1 , wherein volume flow can be varied via the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
5. The controlled deflection roll of claim 4 , further comprising a volume flow regulator.
6. The controlled deflection roll of claim 1 , wherein damping characteristics of the source of support can be varied via the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid.
7. The controlled deflection roll of claim 1 , wherein oscillatory characteristics of the roll shell can be varied via the field that influences the viscosity of the electrorheological fluid (ERF) or ferrofluid and corresponding changes in a pressure chamber of the source of support.
8. The controlled deflection roll of claim 1 , wherein the source of support is operated with the electrorheological fluid (ERF) or ferrofluid.
9. The controlled deflection roll of claim 1 , wherein a plurality of sources of support are supplied with the electrorheological fluid (ERF) or ferrofluid via a common supply line, in which system pressure is maintained.
10. The controlled deflection roll of claim 9 , further comprising a plurality of pressure chambers associated with each respective source of support, and further comprising a connecting line between the pressure chamber of each respective source of support and the common supply line, in which there is integrated a throttling point in which an electric conductor is arranged in order to produce the field.
11. The controlled deflection roll of claim 1 , further comprising a pressure sensor connected directly to a pressure chamber of the source of support.
12. The controlled defection roll of claim 1 , further comprising an electric controller for pressure regulation, the controller arranged outside the roll.
13. The controlled deflection roll of claim 1 , wherein the source of support is operated in a two-circuit system, in which the electrorheological fluid (ERF) or ferrofluid is used only for the pressure regulation and the lubrication of the source of support is carried out with conventional oil.
14. The controlled deflection roll of claim 13 , wherein oil pockets of the source of support are supplied with a constant volume flow.
15. The controlled deflection roll of claim 13 , wherein the electrorheological fluid (ERF) or ferrofluid for the regulation of the pressure in a pressure chamber of the source of support flows in a separate circuit.
16. The controlled deflection roll of claim 13 , wherein in each case a connecting line, in which a throttling point is integrated in order to maintain the pressure in a pressure chamber, is provided between the pressure chamber of a respective source of support and a tank of the ERF or ferrofluid supply.
17. The controlled deflection roll of claim 16 , wherein the throttling point comprises one of an aperture stop and a capillary.
18. The controlled deflection roll of claim 17 , wherein the throttling point comprises an electric conductor.
19. The controlled deflection roll of claim 1 , wherein viscous damping of the source of support, which is moved relative to the yoke, can be varied via change in viscosity of the electrorheological fluid (ERF) or ferrofluid between a guide bush of the source of support and the yoke.
20. The controlled deflection roll of claim 1 , further comprising a damper supported at a first end on of a head of the source of support and at a second end on the yoke, the damper containing electrorheological fluid (ERF) or ferrofluid, the viscosity of which can be influenced by an appropriate field, at least one of the damping characteristics of the head of the source of support, which can be moved relative to the yoke and the oscillatory properties of the roll shell can be varied.
21. The controlled deflection roll of claim 20 , wherein the damper further comprises a cylinder containing the electrorheological fluid (ERF) or ferrofluid and a piston arranged in the cylinder, the piston having an external cross section smaller than an internal cross section of the cylinder, so that in operation fluid displaced by the piston can pass through a radial region between the piston and an inner side of the cylinder.
22. The controlled deflection roll of claim 21 , wherein the respective field that influences the viscosity of the electrorheological fluid (ERF) is produced in the radial region between the piston and the inner side of the cylinder.
23. The controlled deflection roll of claim 1 , further comprising a damper supported on a head of the source of support and on the yoke at a first end via a cylinder and at a second end via a piston rod extending from the outside from the interior of the cylinder or extending to the outside from the interior of the cylinder.
24. The controlled deflection roll of claim 1 further comprising a damper supported on a head of the source of support and on the yoke via a spherical joint.
25. The controlled deflection roll of claim 1 , further comprising a damper substantially arranged within a pressure chamber of the source of support.
26. The controlled deflection roll of claim 1 , wherein the source of support is a ring element.
27. The controlled deflection roll of claim 26 , wherein an internal space enclosed by the ring element is connected to a discharge line in which a throttling point is integrated, which can be adjusted variably by the viscosity of an electrorheological fluid (ERF) or ferrofluid flowing through this throttling point being variable via the electric or magnetic field.
28. The controlled deflection roll of claim 27 , wherein the throttling point comprises an electric conductor which is arranged in a discharge line and via which the electric or magnetic field can be produced.
29. The controlled deflection roll of claim 1 , wherein the support has at least one annular pocket in a supporting face that faces an inner surface of the shell and, facing the yoke, an annular pressure face that bounds a pressure chamber that is connected firstly to a pressure medium feed line and secondly via a throttle to a pocket.
30. The controlled deflection roll of claim 29 , wherein a throttling point is integrated in the pressure medium feed line and can be adjusted variably by the viscosity of an electrorheological fluid (ERF) or ferrofluid flowing through this throttling point and being variable via the electric or magnetic field.
31. The controlled deflection roll of claim 30 , wherein the throttling point comprises an electric conductor that is arranged in the pressure medium feed line and via which the electric or magnetic field can be produced.
32. The controlled deflection roll of claim 1 , further comprising an annular pocket subdivided by transverse webs into a plurality of pocket sections, and wherein each pocket section is connected to the pressure chamber via a throttle.
33. The controlled deflection roll of claim 1 , further comprising a pressure sensor connected directly to a pressure chamber of the source of support.
34. The controlled deflection roll of claim 1 , further comprising a pressure sensor connected directly to an internal space.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004022377A DE102004022377A1 (en) | 2004-05-06 | 2004-05-06 | Deflection roll |
DE102004022377.7 | 2004-05-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050250632A1 true US20050250632A1 (en) | 2005-11-10 |
Family
ID=34926268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/122,410 Abandoned US20050250632A1 (en) | 2004-05-06 | 2005-05-04 | Controlled deflection roll |
Country Status (3)
Country | Link |
---|---|
US (1) | US20050250632A1 (en) |
EP (1) | EP1593864B1 (en) |
DE (2) | DE102004022377A1 (en) |
Cited By (3)
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US20040256077A1 (en) * | 2001-09-18 | 2004-12-23 | Heinrich Marti | Casting roller for a double-roller continuous casting machine |
US20070232469A1 (en) * | 2004-03-05 | 2007-10-04 | Bomba Richard D | Compliant pressure roller with uniform nip pressure |
US20080207418A1 (en) * | 2004-07-19 | 2008-08-28 | Voith Patent Gmbh | Deflection Compensating Roll |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN115870963B (en) * | 2023-02-03 | 2023-08-25 | 极限人工智能有限公司 | Universal ball head based on electrorheological fluid, mechanical arm, robot and working method of robot |
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US5800324A (en) * | 1995-06-10 | 1998-09-01 | Voith Sulzer Papiermaschinen Gmbh | Roll with vibration damper |
US5823927A (en) * | 1995-11-02 | 1998-10-20 | Voith Sulzer Finishing Gmbh | Deflection controllable roller for use in calender |
US6346066B1 (en) * | 1996-10-23 | 2002-02-12 | Valmet Corporation | Tubular roll provided with hydraulically loaded glide bearings |
US6257133B1 (en) * | 1999-03-15 | 2001-07-10 | International Paper | Method and apparatus for controlling cross directional nip dynamics |
US6544156B2 (en) * | 1999-03-15 | 2003-04-08 | International Paper Company | Elastomer roll for papermaking machine |
US6663549B2 (en) * | 2000-10-12 | 2003-12-16 | Voith Paper Patent Gmbh | Deflection controlled roll with force generating device |
US20040065426A1 (en) * | 2001-02-09 | 2004-04-08 | Reijo Pietikainen | Method for controlling the operation of a paper, board or tissue production line |
US6659926B2 (en) * | 2001-07-25 | 2003-12-09 | Voith Paper Patent Gmbh | Deflection controlled roll |
US7037249B2 (en) * | 2001-07-25 | 2006-05-02 | Voith Paper Patent Gmbh | Deflection controlled roll |
US20040087422A1 (en) * | 2001-07-31 | 2004-05-06 | Voith Paper Patent Gmbh | Deflection controlled roll |
US7182721B2 (en) * | 2001-07-31 | 2007-02-27 | Voith Paper Patent Gmbh | Deflection controlled roll |
US20040154479A1 (en) * | 2002-10-17 | 2004-08-12 | Voith Paper Patent Gmbh | Roll, in particular middle roll of a calender, and calender |
US7258654B2 (en) * | 2004-03-05 | 2007-08-21 | Rohm and Haas Dënmark Finance A/S | Compliant pressure roller with uniform nip pressure |
US7465264B2 (en) * | 2004-07-12 | 2008-12-16 | Rohm And Haas Denmark Finance A/S | Axially compliant pressure roller utilizing non-newtonian fluid |
US20080207418A1 (en) * | 2004-07-19 | 2008-08-28 | Voith Patent Gmbh | Deflection Compensating Roll |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040256077A1 (en) * | 2001-09-18 | 2004-12-23 | Heinrich Marti | Casting roller for a double-roller continuous casting machine |
US7455635B2 (en) * | 2001-09-18 | 2008-11-25 | Sms Demag Ag | Casting roller for a double-roller continuous casting machine |
US20070232469A1 (en) * | 2004-03-05 | 2007-10-04 | Bomba Richard D | Compliant pressure roller with uniform nip pressure |
US7662078B2 (en) * | 2004-03-05 | 2010-02-16 | Skc Haas Display Films Co., Ltd. | Method for creating a uniform nip pressure utilizing a compliant pressure roller |
US20080207418A1 (en) * | 2004-07-19 | 2008-08-28 | Voith Patent Gmbh | Deflection Compensating Roll |
US8083657B2 (en) * | 2004-07-19 | 2011-12-27 | Voith Patent Gmbh | Deflection compensating roll |
Also Published As
Publication number | Publication date |
---|---|
EP1593864B1 (en) | 2008-03-12 |
EP1593864A1 (en) | 2005-11-09 |
DE102004022377A1 (en) | 2005-12-08 |
DE502004006488D1 (en) | 2008-04-24 |
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Owner name: VOITH PAPER PATENT GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VAN HAAG, ROLF;REEL/FRAME:017374/0229 Effective date: 20050428 |
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