Braking device and method for operating a braking device

Abstract

Braking device (1) for braking a longitudinal medium (10) to be wound up, comprising a holding device (12) in which at least one brake roller (14a) and at least one counterpart (14b; 14c) arranged adjacent to the at least one brake roller (14a) are arranged, wherein the at least one brake roller (14a) is rotatably mounted at axial end sections (14a1, 14a2) in the holding device (12), wherein the longitudinal medium (10) to be wound up can be guided through between the at least one brake roller (14a) and the at least one counterpart (14b; 14c) and forms frictional contact with the at least one brake roller (14a) and the at least one counterpart (14b; 14c); and comprising an energy recovery device (16a; 16b; 16c) coupled to the at least one brake roller (14a).16d), which is designed to apply a predetermined braking torque to the at least one braking roller (14a) for braking the longitudinal medium (10) to be wound up, characterized in that a braking torque generated by the energy recovery device (16a; 16b; 16c; 16d) can be variably controlled by a control device (27), wherein the control device (27) is designed by a mechanical controller or an electrical controller.;

Description

[0001] The invention relates to a braking device for braking a longitudinal medium to be wound up. The invention further relates to a method for operating a braking device for braking a longitudinal medium to be wound up. State of the art

[0002] Traditionally, large steel coils are uncoiled on a slitting line and cut lengthwise into narrower strips. These strips are then wound up again on a coiler after cutting. However, depending on the sheet thickness, axial offset of the steel coil may occur during coiling.

[0003] This is a disadvantage with regard to further processing of the steel sheet rolls in downstream work processes, as it makes further processing more difficult.

[0004] The problem of misalignment or winding errors arises from the fact that the slitting line was originally designed for thinner material, but was gradually upgraded over time to be able to process or cut thicker sheet thicknesses.

[0005] However, the band brake required for coil winding, which is located upstream of a coiler, has not traditionally been adapted to the larger sheet thicknesses. Due to the insufficient braking power, winding errors repeatedly occur with larger sheet thicknesses.

[0006] DE 40 01 787 C1 discloses a method for the simultaneous winding of several separate steel strips formed by slitting a wide metal strip on a common winding mandrel which can be expanded in diameter, wherein firstly the strip beginnings of all slit strips to be wound simultaneously are fixed on the winding mandrel with predetermined mutual axial distances.

[0007] Then, by rotating the same, the slit strips are wound onto the spread winding mandrel in more than one initial turn under tension and two radially superimposed initial turns of the respective slit strip are connected to each other in a tangential shear-resistant manner in order to form a self-contained sleeve from the initial turns of each slit strip.

[0008] DE 20 2015 105 036 U1 discloses a holding device for rolls, comprising a flat carrying belt for enclosing a circumference of at least one roll and two rotatable rollers, wherein the ends of the carrying belt are fastened to the rollers, so that upon rotation of at least one of the rollers, the carrying belt is at least partially rolled up onto a roller.

[0009] However, with the above-mentioned conventional solutions, an offset in the axial direction of the steel sheet coil can disadvantageously occur when winding onto the take-up reel.

[0010] Furthermore, generic band brake devices are generally designed in such a way that the braking of the band material is achieved by pressing a shoe brake onto the band material. This has the disadvantage, among other things, that in the event of an accumulation of dust or, for example, metal shavings, which can occur during the roll splitting process, the shoe brake can be pressed into the band material, causing scratches and damage to the band material. Furthermore, braking the material using a conventional shoe brake is energy-intensive.

[0011] DE 10 2017 120 012 A1 discloses a brake roller (16) for tensioning several strips (15) made of metal that are guided side by side, in particular for use in slitting lines for metal strips, with a brake shaft (18) and brake rings (19) that are supported on a sliding bearing thereon.

[0012] DE 20 35 291 A discloses a rewinding and cutting machine for strip-shaped material made of paper, cardboard, plastic or metal foil and other foils.

[0013] DE 11 79 174 A discloses a device for the continuous production of small-caliber and thin-walled seamed pipes.

[0014] DE 71 16 170 U discloses a device for braking a sheet metal strip.

[0015] DD 1 14 938 A1 discloses a device for generating a tensile force when winding wire material.

[0016] AT 377 930 B discloses a braking stand for longitudinally split sheet metal strips with two pairs of braking rollers, wherein at least one height-adjustable bending roller is provided between the two pairs of braking rollers.

[0017] The object of the present invention is therefore to provide a braking device for braking a longitudinal medium to be wound up, which enables error-free winding of the band-shaped material of different material thicknesses and which can be operated in an energy-efficient manner.

[0018] The object is achieved by a braking device having the features of patent claim 1. The object is further achieved by a method for operating a braking device having the features of patent claim 14. The object is further achieved by a slitting strip system for longitudinally slitting a longitudinal medium to be wound having the features of patent claim 15. Disclosure of the invention

[0019] The present invention provides a braking device for braking a longitudinal medium to be wound up, comprising a holding device in which at least one braking roller and at least one counterpart arranged adjacent to the at least one braking roller are arranged, wherein the at least one braking roller is rotatably mounted at axial end sections in the holding device, wherein the longitudinal medium to be wound up can be guided between the at least one braking roller and the at least one counterpart and forms frictional contact with the at least one braking roller and the at least one counterpart, and comprising an energy recovery device coupled to the at least one braking roller, which is designed to apply a predetermined braking torque to the at least one braking roller in order to brake the longitudinal medium to be wound up.

[0020] The present invention further provides a method for operating a braking device for braking a longitudinal medium to be wound up. The method comprises providing a holding device in which a braking roller and at least one counterpart arranged adjacent to the at least one braking roller are arranged, wherein the at least one braking roller is rotatably mounted at axial end portions in the holding device.

[0021] The method further comprises arranging the at least one brake roller and the at least one counterpart arranged adjacent to the at least one brake roller in such a way that the longitudinal medium to be wound up can be guided between the at least one brake roller and the at least one counterpart and forms frictional contact with the at least one brake roller and the at least one counterpart.

[0022] The method further comprises converting a kinetic energy of the at least one brake roller by means of an energy recovery device coupled to the at least one brake roller, which energy recovery device applies a predetermined braking torque to the at least one brake roller in order to brake the longitudinal medium to be wound up.

[0023] The present invention further provides a slitting strip plant for longitudinally dividing a longitudinal medium to be wound up, preferably a steel strip, with an uncoiler, a winding reel and a braking device according to the invention arranged between the uncoiler and the winding reel.

[0024] One idea of ​​the present invention is to advantageously recover the braking power of the at least one brake roller for decelerating the strip-shaped material by providing the energy recovery device, which is coupled to the at least one brake roller, and thus make it available to another consumer. Thus, the energy that is normally wasted when decelerating the longitudinal medium being wound up can be reused.

[0025] Furthermore, a surface of the longitudinal medium to be wound up can be protected by providing at least one brake roller, since, in contrast to the brake shoes, only point contact is provided when the brake roller rolls on the longitudinal medium, as opposed to line contact in the context of the shoe brake of the prior art.

[0026] Advantageous embodiments and further developments emerge from the subclaims and from the description with reference to the figures.

[0027] According to a preferred development, the at least one counterpart arranged in the holding device is formed by at least one further brake roller or a sliding base, and wherein the at least one brake roller is coupled to the energy recovery device directly or via a gear. Thus, the braking device can advantageously be adapted to respective systemic and structural requirements. If only one brake roller is provided, this can, for example, be coupled directly to the energy recovery device. If a plurality of brake rollers is provided, these can, for example, be coupled to a gear, which in turn is connected to the energy recovery device.

[0028] According to a further preferred development, it is provided that the at least one further brake roller is coupled to the energy recovery device, wherein the energy recovery device is designed to apply a predetermined braking torque to the further brake roller in order to brake the longitudinal medium to be wound up.

[0029] By applying the specified braking torque to the longitudinal medium to be wound up, the energy recovery device can advantageously recover the braking power and make it available to another suitable consumer.

[0030] According to a further preferred development, the energy recovery device is designed as an electric generator, a hydraulic pump, a pneumatic pump, or a mechanical device. Due to the multitude of design options for the energy recovery device, there is flexibility regarding the form of the recovered energy, depending on the type of consumer to which the recovered energy is to be supplied.

[0031] According to a further preferred development, it is provided that the at least one brake roller is coupled to the electrical generator for converting kinetic energy into electrical energy, wherein the electrical energy generated by the electrical generator can be provided to a first consumer, in particular an electrical consumer, or fed into the grid.

[0032] The design of the energy recovery device in the form of an electrical machine which is operated as a generator advantageously offers the greatest possible flexibility, since the generated electrical energy can be used to drive a large number of consumers or the energy can be fed into the grid.

[0033] According to a further preferred development, it is provided that the at least one brake roller is coupled to the hydraulic pump for converting kinetic energy into hydraulic pressure, wherein the hydraulic pressure generated by the hydraulic pump can be provided to a second consumer, or that the at least one brake roller is coupled to the pneumatic pump for converting kinetic energy into pneumatic pressure, wherein the pneumatic pressure generated by the pneumatic pump can be provided to a third consumer, or that the at least one brake roller is coupled to a shaft for driving a fourth consumer. Thus, the energy recovery device can advantageously be implemented in the form of a suitable solution depending on the individual requirements.

[0034] Thus, the braking power of the at least one brake roller coupled to the energy recovery device can be individually adjusted to the thickness of the longitudinal medium to be wound, so that the braking power can be optimally adjusted for the thickness of the longitudinal medium to be processed. This prevents offset during winding in the axial direction of the longitudinal medium and additionally recovers the kinetic energy of the at least one brake roller.

[0035] According to a further preferred development, it is provided that in the holding device a first pair of brake rollers, a second pair of brake rollers and a third pair of brake rollers are arranged offset from one another in the longitudinal direction of the holding device and are height-adjustable, wherein the first pair of brake rollers, the second pair of brake rollers and the third pair of brake rollers are height-adjustable from an operating position to an inoperative position.

[0036] Providing multiple brake roller pairs has the advantage that, compared to providing only one brake roller pair, each of the brake roller pairs transmits less torque to the corresponding shafts connecting the brake roller pair to a transmission. Furthermore, providing a plurality of brake roller pairs provides redundancy in the band brake device, allowing a failure of one of the brake roller pairs to be compensated for by one of the additional brake roller pairs.

[0037] The height adjustability of the respective brake roller pairs also makes it possible to control the number of brake roller pairs used depending on the individual requirements for the braking performance, so that in the present band brake device, for example, one brake roller pair, two brake roller pairs or three brake roller pairs can be used.

[0038] According to a further preferred development, it is provided that a height position of the brake roller and / or the further brake roller can be adjusted by hydraulic cylinders connected to respective axial end sections of the brake roller and the further brake roller and fastened to the holding device.

[0039] Thus, the brake roller and / or the other brake roller of the respective brake roller pair can be adjusted by the hydraulic cylinders from the operating position to the inoperative position and vice versa if required.

[0040] According to a further preferred development, it is provided that the brake roller and the further brake roller have a splined shaft at the axial end sections, wherein the splined shaft of the brake roller is positively connected to a splined hub of a first cardan shaft flange and the splined shaft of the further brake roller is positively connected to a splined hub of a second cardan shaft flange.

[0041] The axial end sections of the brake roller and the additional brake roller are designed as a splined hub, enabling efficient torque transmission to downstream shafts without slippage. The positive connection of the splined shaft of the brake roller to the splined hub of a first cardan shaft flange and the splined shaft of the additional brake roller to a splined hub of a second cardan shaft flange enables effective power transmission from the splined shaft to the splined hub of the respective cardan shaft flange.

[0042] According to a further preferred development, it is provided that the first propeller shaft flange is connected to a first propeller shaft and the second propeller shaft flange is connected to a second propeller shaft, wherein the first propeller shaft is connected to a first input shaft of the transmission and the second propeller shaft is connected to a second input shaft of the transmission.

[0043] This means that the kinetic energy of each of the brake rollers can be transferred directly to the gearbox via a cardan shaft.

[0044] According to a further preferred development, it is provided that the transmission is designed to synchronize a rotational speed of the first brake roller and the second brake roller of the at least one brake roller pair and to combine their torque on a common output shaft of the transmission.

[0045] The provision of the gear thus has the advantage that a rotational speed of the brake roller and the other brake roller of a respective brake roller pair can always be kept synchronous, which contributes to a uniform braking of the longitudinal medium by the respective brake roller pair.

[0046] According to a further preferred development, it is provided that the first cardan shaft is designed to compensate for a height offset of the brake roller to the first input shaft of the transmission, and wherein the second cardan shaft is designed to compensate for a height offset of the further brake roller to the second input shaft of the transmission.

[0047] The provision of the cardan shafts thus has the advantage that the respective brake rollers are always connected to the associated input shaft of the transmission, regardless of whether the respective brake rollers are arranged in an operating position or in an inoperative position.

[0048] According to a further preferred embodiment, the transmission is designed as a straightening machine transmission, wherein the transmission is coupled to the electric generator by a chain drive. The provision of a straightening machine transmission enables effective torque transmission from the plurality of input shafts to a common output shaft of the transmission, wherein the chain drive enables a structurally simple and reliable power transmission from the transmission to the electric generator.

[0049] The described designs and further training courses can be combined as desired.

[0050] Further possible embodiments, further developments and implementations of the invention also include combinations of features of the invention described previously or below with regard to the exemplary embodiments that are not explicitly mentioned. Short description of the drawings

[0051] The accompanying drawings are intended to provide a further understanding of embodiments of the invention. They illustrate embodiments and, in conjunction with the description, serve to explain principles and concepts of the invention.

[0052] Other embodiments and many of the aforementioned advantages will become apparent upon review of the drawings. The elements illustrated in the drawings are not necessarily drawn to scale.

[0053] They show: Fig. 1 is a schematic representation of a braking device for braking a longitudinal medium to be wound up according to a preferred embodiment of the invention; Fig. 2 a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention; Fig. 3 a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention; Fig. 4 a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention; Fig. 5 a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention; Fig. 6 a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention; Fig. 7 a side view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention; Fig. 8 a further side view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention; Fig. 9 a plan view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention; Fig. 10 is a flowchart of a method for operating a braking device for braking the longitudinal medium to be wound up according to the preferred embodiment of the invention; and Fig. 11 is a schematic representation of a slitting strip system for longitudinally dividing the longitudinal medium to be wound up according to the preferred embodiment of the invention.

[0054] In the figures of the drawings, the same reference symbols designate the same or functionally equivalent elements, parts or components, unless otherwise stated.

[0055] Fig. 1 shows a schematic representation of a braking device for braking a longitudinal medium to be wound up according to a preferred embodiment of the invention.

[0056] The braking device 1 for braking the longitudinal medium 10 to be wound up has a holding device 12.

[0057] A brake roller 14a and another brake roller 14b are arranged in the holding device 12. The brake roller 14a is rotatably mounted at axial end sections 14a1, 14a2 in the holding device 12. Furthermore, the additional brake roller 14b is also rotatably mounted at axial end sections 14b1, 14b2 in the holding device 12.

[0058] The longitudinal medium 10 to be wound up can be passed between the brake roller 14a and the further brake roller 14b and forms frictional contact with the brake roller 14a and the further brake roller 14b.

[0059] The braking device 1 further comprises an energy recovery device 16a coupled to the braking roller 14a and the further braking roller 14b via a gear 34, which is designed to apply a predetermined braking torque to the braking roller 14a and the further braking roller 14b in order to brake the longitudinal medium 10 to be wound up.

[0060] The longitudinal medium 10 to be wound is preferably formed by a sheet metal roll, for example a steel sheet roll, particularly preferably a stainless steel sheet roll. Alternatively, the longitudinal medium to be wound can be formed, for example, by a wire, a paper web, or another web-like material.

[0061] In the present embodiment, the energy recovery device 16a is formed by an electric generator 16a. The brake roller 14a and the further brake roller 14b are coupled to the electric generator 16a to convert kinetic energy into electrical energy.

[0062] The energy generated by the electric generator can be supplied to a first consumer 17a, in particular an electrical consumer, or fed into the grid. Furthermore, a control device 27 is provided, which enables variable control of the braking torque generated by the electric generator 16a.

[0063] The control device 27 is preferably designed as a mechanical controller. Alternatively, the control device 27 can be designed as an electrical controller, for example.

[0064] Fig. 2 shows a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention.

[0065] In the present embodiment, the counterpart 14c arranged in the holding device 12 is formed by a sliding base 14c. Thus, only the brake roller 14a is coupled to the energy recovery device 16a, which is designed as an electric generator. Since only one brake roller 14a is provided in the present embodiment, the electric generator 16a can be directly coupled to the brake roller 14a without providing a transmission. The electric generator 16a and the control device 27 are arranged in a common housing 35 in the present embodiment.

[0066] Fig. 3 shows a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention.

[0067] According to the present embodiment, the brake roller 14a and the further brake roller 14b are arranged in the holding device 12, between which the longitudinal medium 10 to be wound can be passed. The energy recovery device 16b is formed by a hydraulic pump 16b.

[0068] A hydraulic pressure generated by the hydraulic pump 16b can be supplied to a second consumer 17b. The kinetic energy of the brake roller 14a and the further brake roller 14b can thus be converted into a hydraulic pressure of a fluid by the hydraulic pump 16b.

[0069] Fig. 4 shows a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention.

[0070] According to the present embodiment, the brake roller 14a and the further brake roller 14b are arranged in the holding device 12, between which the longitudinal medium 10 to be wound can be passed. The energy recovery device 16b is formed by a pneumatic pump 16c.

[0071] A pneumatic pressure generated by the pneumatic pump 16c can be supplied to a second consumer 17c. The kinetic energy of the brake roller 14a and the further brake roller 14b can thus be converted into a pneumatic pressure of a fluid by the pneumatic pump 16c.

[0072] Fig. 5 shows a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention.

[0073] According to the present embodiment, the brake roller 14a and the further brake roller 14b are arranged in the holding device 12, between which the longitudinal medium 10 to be wound up can be passed, wherein the brake roller 14a and the further brake roller 14b are coupled via a gear 34 to a shaft 16d for driving a fourth consumer 17d.

[0074] The energy recovery device 16d is thus designed by the shaft 16d to drive the fourth consumer 17d.

[0075] Fig. 6 shows a schematic representation of the braking device for braking the longitudinal medium to be wound up according to a further preferred development of the invention.

[0076] The longitudinal medium 10 is preferably formed by a sheet steel roll. Alternatively, the longitudinal medium 10 can be formed, for example, by a paper or plastic roll or a wire roll. The braking device 1 for braking the longitudinal medium 10 to be wound further comprises the holding device 12.

[0077] According to the present embodiment, three pairs of brake rollers are arranged in the holding device 12, wherein in the present view a first pair of brake rollers 14a, 14b and an upper brake roller 18a, 20a of a second pair of brake rollers and a third pair of brake rollers are visible.

[0078] The respective brake roller pairs, explained by way of example using the first brake roller pair 14a, 14b, are rotatably mounted at respective axial end sections in the holding device 12.

[0079] Thus, the first pair of brake rollers 14a, 14b is rotatably mounted on corresponding axial sections 14a1, 14b1 in the holding device 12. The first pair of brake rollers comprises the brake roller 14a and the further brake roller 14b, which are arranged relative to one another in the holding device 12 such that the longitudinal medium 10 can be guided between the brake roller 14a and the further brake roller 14b.

[0080] The braking device 1 is coupled to the transmission 34 by connecting means described in the following figures, which in turn is connected to an electric generator 16a. The kinetic energy of the respective brake roller pairs used is thus transferred to the electric generator 16a for conversion of the kinetic energy into electrical energy.

[0081] The gear 34 is further designed to synchronize a rotational speed of the brake roller 14a and the further brake roller 14b of the first brake roller pair 14a, 14b and to reduce their torque to a (in Fig. 1 (not shown) common output shaft of the gearbox 34. The same applies to the respective brake rollers of the second brake roller pair and the third brake roller pair.

[0082] The Fig. 6 - 9 as well as the connecting means for connecting the respective brake rollers with the gearbox are also to be Fig. 1, Fig. 3, Fig. 4 and Fig. 5 shown embodiments are applicable.

[0083] Fig. Figure 7 shows a side view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention.

[0084] A height position of the brake roller 14a and the further brake roller 14b of the first brake roller pair, the second brake roller pair and the third brake roller pair is adjustable by hydraulic cylinders 22a1, 22b2, 22c2 which are connected to the holding device 12 at respective axial end sections of the brake roller and the further brake roller of the respective brake roller pair.

[0085] This side view shows one of the two sides of the holding device. The brake roller and the other brake roller of the respective brake roller pair are arranged so that they can be moved in a substantially vertically arranged slot.

[0086] A connection of the respective hydraulic cylinder with the respective upper brake roller is not shown in the present illustration, it being apparent to the person skilled in the art that the upper brake roller and the lower brake roller can be connected by a respective suitable mechanism in such a way that when the hydraulic cylinder is actuated, they can be moved, for example, synchronously towards or away from each other.

[0087] Alternatively, the respective hydraulic cylinder can, for example, be connected only to one of the lower brake rollers of the respective brake roller pair and the respective upper brake roller of the corresponding brake roller pair can be fixed in the holding device, so that when a respective brake roller pair is moved into a disengaged or inoperative position, only one of the two brake rollers of the respective brake roller pair is moved.

[0088] The brake roller 14a of the first brake roller pair is rotatably mounted at one of its axial end sections by means of a bearing 15a2 in the holding device 12. The other brake roller 14b is rotatably mounted in the holding device 12 by means of a bearing 15b2.

[0089] Similarly, a brake roller 18a of the second brake roller pair is supported by a bearing 19a2 and the (in Fig. 7 not shown) further brake roller of the second brake roller pair is rotatably mounted in the holding device 12 by a bearing 19b2.

[0090] In addition, the brake roller 20a1 of the third brake roller pair is supported by a bearing 21a2 and the (in Fig. 7 not shown) further brake roller of the third brake roller pair is rotatably mounted by a bearing 21b2 in the holding device 12.

[0091] Fig. 8 shows a further side view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention.

[0092] The brake roller 14a and the further brake roller 14b of the first brake roller pair have a splined shaft 24a, 24b at axial end sections 14a1, 14b2. The axial end sections 14a1, 14b2 are arranged on a side of the holding device 12 opposite the gear 34.

[0093] The splined shaft 24a of the brake roller 14a is positively connected to a splined hub 26a of a first splined shaft flange 28a. Furthermore, the splined shaft 24b of the further brake roller 14b is positively connected to a splined hub 26b of a second cardan shaft flange 28b.

[0094] The first propeller shaft flange 28a is connected to a first propeller shaft 30a. Furthermore, the second propeller shaft flange 28b is connected to a second propeller shaft 30b.

[0095] The first drive shaft 30a is connected to a first input shaft 32a of the transmission 34. Furthermore, the second drive shaft 30b is connected to a second input shaft 32b of the transmission 34. The first input shaft 32a and the second input shaft 32b of the transmission 34 are combined in the transmission 34 to form a common output shaft 37, which is coupled to the electric generator 16a arranged below it by a chain drive 38. The transmission 34 is preferably designed as a straightening machine transmission.

[0096] Furthermore, the first propeller shaft 30a is designed to compensate for a height offset of the brake roller 14a relative to the first input shaft 32a of the transmission 34. Furthermore, the second propeller shaft 30b is designed to compensate for a height offset of the further brake roller 14b relative to the second input shaft 32b of the transmission 34.

[0097] The first input shaft 30a and the second input shaft 30b are each designed to transmit a torque of up to 3000 Nm to the transmission.

[0098] The brake roller 14a and the further brake roller 14b of the first brake roller pair 14a, 14b and the (in Fig. 8 not shown) each have a diameter / length ratio of 0.1 to 0.5, preferably of 0.2 to 0.4, particularly preferably of 0.2 to 0.3.

[0099] Fig. 9 shows a plan view of the braking device for braking the longitudinal medium to be wound up according to the Fig. 6 shows a further preferred embodiment of the invention.

[0100] In the holding device 12, the first brake roller pair 14a, 14b, the second brake roller pair 18a, 18b and the third brake roller pair 20a, 20b are arranged sequentially in the conveying direction of the longitudinal medium 10 to be wound up, wherein in the present illustration only the respective upper brake roller of the respective brake roller pair is shown.

[0101] The gear 34 translates the speed of the brake roller 14a, 18a, 20a and the further brake roller 14b, 18b, 20b of the respective brake roller pairs into a higher speed with a ratio of 1:15 to 1:25, preferably 1:19.

[0102] As already mentioned in Fig. 8 with reference to the brake roller 14a and the further brake roller 14b of the first brake roller pair, the brake roller and the further brake roller of the second brake roller pair and third brake roller pair are also connected to the gear 34 via corresponding connecting means.

[0103] It is like in Fig. 9, the brake roller 18a of the second brake roller pair is rotatably mounted in the holding device 12 at an axial end section and has a splined shaft at the respective axial end section, which is positively connected to a splined hub 36a of a first cardan shaft flange 38a.

[0104] The first propeller shaft flange 38a is connected to a first propeller shaft 40a, wherein the first propeller shaft 40a is connected at its opposite axial end portion to a further propeller shaft flange 41a, which in turn is coupled to a first input shaft 42a of the transmission 34.

[0105] Furthermore, as in Fig. 9, the brake roller 18a of the third brake roller pair is rotatably mounted in the holding device 12 at an axial end section and has a splined shaft at the respective axial end section, which is positively connected to a splined hub 46a of a first cardan shaft flange 48a.

[0106] The first propeller shaft flange 48a is connected to a first propeller shaft 50a, wherein the first propeller shaft 50a is connected at its opposite axial end portion to a further propeller shaft flange 51a, which in turn is coupled to a first input shaft 52a of the transmission 34.

[0107] Fig. 10 shows a flowchart of a method for operating a braking device for braking the longitudinal medium to be wound up according to the preferred embodiment of the invention.

[0108] The method comprises providing S1 a holding device 12 in which at least one brake roller 14a and at least one counterpart 14b; 14c arranged adjacent to the at least one brake roller 14a are arranged, wherein the at least one brake roller 14a is rotatably mounted on axial end sections 14a1, 14a2 in the holding device 12.

[0109] The method further comprises arranging S2 the at least one brake roller 14a and the at least one counterpart 14b; 14c arranged adjacent to the at least one brake roller 14a such that the longitudinal medium 10 to be wound up can be guided between the at least one brake roller 14a and the at least one counterpart 14b; 14c and forms frictional contact with the at least one brake roller 14a and the at least one counterpart 14b; 14c.

[0110] The method further comprises converting S3 a kinetic energy of the at least one brake roller 14a by means of an energy recovery device 16a; 16b; 16c; 16d coupled to the at least one brake roller 14a, which energy recovery device applies a predetermined braking torque to the at least one brake roller 14a in order to brake the longitudinal medium 10 to be wound up.

[0111] Fig.11 shows a schematic representation of a slitting strip system for longitudinally dividing the longitudinal medium to be wound up according to the preferred embodiment of the invention.

[0112] The slit strip system 100 has a decoiler 101 in which a roll of the longitudinal medium is inserted or mounted. Furthermore, the slit strip system 100 has a splitting device 101a for splitting the longitudinal medium 10.

[0113] The slit strip line 100 then has a pit 102, which is followed by the braking device 1 according to the present invention. Following the braking device 1 is a winding reel 103, in which the slit, longitudinally shaped medium 10 is rewound.

[0114] Although the present invention has been described above using preferred embodiments, it is not limited thereto, but can be modified in a variety of ways. In particular, the invention can be changed or modified in a variety of ways without deviating from the essence of the invention.

[0115] For example, a shape, dimension and / or quality of the components of the braking device may be changed.

Claims

[1] Braking device (1) for braking a longitudinal medium (10) to be wound up, comprising a holding device (12) in which at least one braking roller (14a) and at least one counterpart (14b; 14c) arranged adjacent to the at least one braking roller (14a) are arranged, wherein the at least one braking roller (14a) is rotatably mounted at axial end sections (14a1, 14a2) in the holding device (12), wherein the longitudinal medium (10) to be wound up can be guided through between the at least one braking roller (14a) and the at least one counterpart (14b; 14c) and forms frictional contact with the at least one braking roller (14a) and the at least one counterpart (14b; 14c); and with an energy recovery device (16a; 16b; 16c; 16d) coupled to the at least one brake roller (14a), which is designed to apply a predetermined braking torque to the at least one brake roller (14a) for braking the longitudinal medium (10) to be wound up,characterized by that a braking torque generated by the energy recovery device (16a; 16b; 16c; 16d) can be variably controlled by a control device (27), wherein the control device (27) is designed by a mechanical controller or an electrical controller. [2] Braking device according to claim 1, characterized by that the at least one counterpart (14b; 14c) arranged in the holding device (12) is formed by at least one further brake roller (14b) or a sliding base (14c), and wherein the at least one brake roller (14a) is coupled to the energy recovery device (16a; 16b; 16c; 16d) directly or via a gear (34). [3] Braking device according to claim 2, characterized bythat the at least one further brake roller (14b) is coupled to the energy recovery device (16a; 16b; 16c; 16d), wherein the energy recovery device (16a; 16b; 16c; 16d) is designed to apply a predetermined braking torque to the further brake roller (14b) in order to brake the longitudinal medium (10) to be wound up. [4] Braking device according to one of the preceding claims, characterized by that the energy recovery device (16a; 16b; 16c; 16d) is formed by an electric generator (16a), a hydraulic pump (16b), a pneumatic pump (16c) or a mechanical device (16d). [5] Braking device according to claim 4, characterized byin that the at least one brake roller (14a) is coupled to the electrical generator (16a) for converting kinetic energy into electrical energy, wherein the electrical energy generated by the electrical generator can be provided to a first consumer (17a), in particular an electrical consumer, or can be fed into the network. [6] Braking device according to claim 4, characterized bythat the at least one brake roller (14a) is coupled to the hydraulic pump (16b) for converting kinetic energy into hydraulic pressure, wherein the hydraulic pressure generated by the hydraulic pump (16b) can be made available to a second consumer (17b), or that the at least one brake roller (14a) is coupled to the pneumatic pump (16c) for converting kinetic energy into pneumatic pressure, wherein the pneumatic pressure generated by the pneumatic pump (16c) can be made available to a third consumer (17c), or that the at least one brake roller (14a) is coupled to a shaft (16d) for driving a fourth consumer (17d). [7] Braking device according to one of the preceding claims, characterized byin that in the holding device (12) a first pair of brake rollers (14a, 14b), a second pair of brake rollers (18a, 18b) and a third pair of brake rollers (20a, 20b) are arranged offset from one another in the longitudinal direction of the holding device (12) and are height-adjustable, wherein the first pair of brake rollers (14a, 14b), the second pair of brake rollers (18a, 18b) and the third pair of brake rollers (20a, 20b) are height-adjustable from an operating position to an inoperative position. [8] Braking device according to one of the preceding claims, characterized by that a height position of the brake roller (14a) and / or the further brake roller (14b) is adjustable by hydraulic cylinders (22a1, 22a2, 22b1, 22b2, 22c1, 22c2) which are connected to respective axial end sections (14a1, 14a2, 14b1, 14b2) of the brake roller (14a) and the further brake roller (14b) and are fastened to the holding device (12). [9] Braking device according to one of the preceding claims, characterized bythat the brake roller (14a) and the further brake roller (14b) have a splined shaft (24a, 24b) at the axial end sections (14a1, 14b1), wherein the splined shaft (24a) of the brake roller (14a) is positively connected to a splined hub (26a) of a first cardan shaft flange (28a) and the splined shaft (24b) of the further brake roller (14b) is positively connected to a splined hub (26b) of a second cardan shaft flange (28b). [10] Braking device according to claim 9, characterized by that the first propeller shaft flange (28a) is connected to a first propeller shaft (30a) and the second propeller shaft flange (28b) is connected to a second propeller shaft (30b), wherein the first propeller shaft (30a) is connected to a first input shaft (32a) of the transmission (34) and the second propeller shaft (30b) is connected to a second input shaft (32b) of the transmission (34). [11] Braking device according to claim 10, characterized byin that the transmission (34) is designed to synchronize a rotational speed of the first brake roller (14a) and the second brake roller (14b) of the at least one brake roller pair (14a, 14b) and to combine their torque onto a common output shaft (37) of the transmission (34). [12] Braking device according to claim 10 or 11, characterized by in that the first cardan shaft (30a) is designed to compensate for a height offset of the brake roller (14a) to the first input shaft (32a) of the transmission (34), and wherein the second cardan shaft (30b) is designed to compensate for a height offset of the further brake roller (14b) to the second input shaft (32b) of the transmission (34). [13] Braking device according to one of claims 4, 5 and 7 to 12, characterized by that the transmission (34) is formed by a straightening machine transmission, wherein the transmission (34) is coupled to the electric generator (16) by a chain drive (38). [14] Method for operating a braking device (1) for braking a longitudinal medium (10) to be wound up, comprising the steps: Providing (S1) a holding device (12) in which at least one brake roller (14a) and at least one counterpart (14b; 14c) arranged adjacent to the at least one brake roller (14a) are arranged, wherein the at least one brake roller (14a) is rotatably mounted at axial end sections (14a1, 14a2) in the holding device (12); Arranging (S2) the at least one brake roller (14a) and the at least one counterpart (14b; 14c) arranged adjacent to the at least one brake roller (14a) such that the longitudinal medium (10) to be wound up can be guided between the at least one brake roller (14a) and the at least one counterpart (14b; 14c) and forms frictional contact with the at least one brake roller (14a) and the at least one counterpart (14b; 14c); and Converting (S3) a kinetic energy of the at least one brake roller (14a) by means of an energy recovery device (16a; 16b; 16c; 16d) coupled to the at least one brake roller (14a), which energy recovery device applies a predetermined braking torque to the at least one brake roller (14a) to brake the longitudinal medium (10) to be wound up, characterized by that a braking torque generated by the energy recovery device (16a; 16b; 16c; 16d) is variably controlled by a control device (27), wherein the control device (27) is formed by a mechanical controller or an electrical controller. [15] Slitting strip plant (100) for longitudinally dividing a longitudinal medium (10) to be wound up, preferably a steel strip, with a decoiler (101), a winding reel (103) and a braking device (1) according to one of claims 1 to 13 arranged between the decoiler (101) and the winding reel (102).

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