Drive unit and drive unit for twin wire press

Abstract

The present invention relates to a drive device having a roll (1, 10) having a roll bearing (3), a bearing housing (4), and a motor (6), in which the bearing housing (4) of the roll bearing (3) is connected to a frame or base, and the drive torque of the motor (6) can be transmitted to the roll (1, 10). This drive device is characterized in that the motor (6) is connected to the bearing housing (4), and the reaction torque of the motor (6) can be transmitted to the bearing housing (4). This allows good access to the roll (1, 10) while avoiding mechanical loads being introduced into the roll (1, 10).

Description

Technical Field

[0008] ,

[0010] , Swedish Patent No. 671892 discloses an individual roll drive having a direct drive unit comprising a motor and a reduction gearbox, wherein the direct drive unit is flanged to a bearing housing, and the torque applied by the direct drive unit is supported by this housing. To transmit the torque, a slip-on gear mechanism—usually formed as a spline shaft—engages with the shaft of the reduction gearbox and recesses in the shaft journal. The use of a slip-on gear mechanism eliminates the effect of the roll on bending due to the inclination of the direct drive unit. , West German Patent Application Publication No. 2629039 discloses a roller table roller driven by a geared motor, wherein the journal of the roller table roller is rotatably supported in a bearing housing, and the geared motor is directly flanged to the bearing housing. ,

[0007] ,

[0009] , West German Patent Application Publication No. 1427925 discloses a compact electric transmission roller having a small rotational mass and a highly rigid bearing section, in which a planetary gear system is arranged within a bearing housing. In particular, the planetary carrier is kept highly rigid so that there is no risk of tilting, as the impact of the roller does not cause displacement, and therefore point interference, with respect to the gear teeth. In this case, the motor is coupled to the planetary gear system via a torsion bar, which functions as an internal sun gear of the planetary gear system and simultaneously as a torsionally elastic coupling, thereby compensating for misalignment of the electric motor. Furthermore, an elastic spacer is incorporated between the base frame and the bearing housing to mitigate load impact from the roller. , West German Patent Application Publication No. 1285972 discloses individual drive units for straightening rolls of a sheet straightening machine having a planetary gear system, wherein the rolls are supported via rolling bearings within a tiltable bearing housing, and each straightening roll has an individual drive unit comprising an electric motor flanged directly to the bearing housing and a planetary gear system housed in a hole in the bearing housing. ,

[0006] , , , , , , , , ,

[0001] The present invention relates to a drive device having a roll rotatable about an axis, a roll bearing portion, a bearing housing, and a motor, wherein the roll is supported via the roll bearing portion, the bearing housing of the roll bearing portion is coupled to a frame or a base, and the driving torque of the motor can be transmitted to the roll.

[0002] The present invention further relates to a twin-wire press having a first roll for driving a first mesh and a second roll for driving a second mesh, wherein at least one of the rolls has a drive device according to the present invention.

[0003] The present invention also relates to the use of a drive device according to the present invention for driving a roll in a twin-wire press.

Background Art

[0004] A drive device is disclosed in German Utility Model No. 202013009581. Mounting of a rotating means, for example a motor, to the shaft of the roll is performed, the rotating means includes a rotating shaft formed as a hollow shaft, and the torque can be transmitted to the shaft of the roll via the rotating shaft.

[0005] German Patent Application Publication No. 102006060853 discloses a roll drive unit provided with a gearbox having a housing, a central gear, and an output shaft. The roll drive unit further has a drive motor, and this drive motor is drivably coupled to the central gear via a pinion.

[0006] West German Patent Application Publication No. 1427925 discloses a compact electric transmission roller having a small rotational mass and a highly rigid bearing section, in which a planetary gear system is arranged within a bearing housing. In particular, the planetary carrier is kept highly rigid so that there is no risk of tilting, as the impact of the roller does not cause displacement, and therefore point interference, with respect to the gear teeth. In this case, the motor is coupled to the planetary gear system via a torsion bar, which functions as an internal sun gear of the planetary gear system and simultaneously as a torsionally elastic coupling, thereby compensating for misalignment of the electric motor. Furthermore, an elastic spacer is incorporated between the base frame and the bearing housing to mitigate load impact from the roller.

[0007] Swedish Patent No. 671892 discloses an individual roll drive having a direct drive unit comprising a motor and a reduction gearbox, wherein the direct drive unit is flanged to a bearing housing, and the torque applied by the direct drive unit is supported by this housing. To transmit the torque, a slip-on gear mechanism—usually formed as a spline shaft—engages with the shaft of the reduction gearbox and recesses in the shaft journal. The use of a slip-on gear mechanism eliminates the effect of the roll on bending due to the inclination of the direct drive unit.

[0008] West German Patent Application Publication No. 1285972 discloses individual drive units for straightening rolls of a sheet straightening machine having a planetary gear system, wherein the rolls are supported via rolling bearings within a tiltable bearing housing, and each straightening roll has an individual drive unit comprising an electric motor flanged directly to the bearing housing and a planetary gear system housed in a hole in the bearing housing.

[0009] West German Patent Application Publication No. 2629039 discloses a roller table roller driven by a geared motor, wherein the journal of the roller table roller is rotatably supported in a bearing housing, and the geared motor is directly flanged to the bearing housing.

[0010] A twin-wire press for dewatering fiber suspensions enables the formation of a continuous fiber web. The twin-wire press, and in particular a frame for the twin-wire press, are described in Austrian Patent No. 502584.

[0011] In a twin-wire press, the fiber suspension is concentrated from, for example, an inlet concentration of 3% to 8% by weight to, for example, an outlet concentration of over 30% by weight. Typically, a twin-wire press has a first mesh course having a first mesh and a second mesh course having a second mesh, these meshes being formed permeably—for example, as wires. The fiber suspension is introduced between rotating meshes and dewatered. In this case, each mesh course has at least one driven roll, to which the driving torque of a motor can be transmitted via a gearbox.

[0012] A typical drive system is characterized by the rolls to be driven being positioned vertically, with a gearbox mounted on each roll neck, and the gearboxes also being positioned vertically. In this arrangement, for example, each motor is coupled to the frame, and the vertically positioned gearboxes are coupled via a torque support that prevents rotation of the gearbox housing. This arrangement is easy to conceive because the drive system—having motors, gearboxes, couplings, etc.—is composed of independent standard parts that must ultimately be adapted to a very specific configuration.

[0013] Conventional drive systems have several drawbacks. When the gearbox is fixed to the roll neck, the weight of the gearbox is loaded onto the roll neck, causing bending stress. If a torque support is used to prevent rotation of the gearbox housing, the roll neck is also loaded by the torque of the torque support. In this case, access to the individual components of the drive system is generally difficult. In addition, removing the drive roll requires the prior disassembly and removal of the drive system. [Prior art documents] [Patent Documents]

[0014] [Patent Document 1] German Utility Model No. 202013009581 Specification [Patent Document 2] German Patent Application Publication No. 102006060853 [Patent Document 3] Ukoku Patent No. 502584 Specification [Patent Document 4] West German Patent Application Publication No. 1427925 [Patent Document 5] Zuikoku Patent No. 671892 specification [Patent Document 6] Specification of West German Patent Application Publication No. 1285972 [Patent Document 7] West German Patent Application Publication No. 2629039 [Overview of the Initiative] [Problems that the invention aims to solve]

[0015] The objective of the present invention is to achieve an effective drive system while improving accessibility to the individual components and rolls of the drive system, and to minimize the mechanical load, such as bending stress, introduced to the rolls through the drive system. [Means for solving the problem]

[0016] This is achieved, according to the present invention, by the motor being directly coupled to the bearing housing of the roll bearing section, and the motor's reaction torque being transmittable to the bearing housing of the roll bearing section. In this case, the rotatable roll is supported via the roll bearing section, and the bearing housing of the roll bearing section is coupled to the machine frame or base. For example, the rotatable roll has a roll neck on the drive side, and the roll neck is supported by the roll bearing section. The motor transmits the drive torque to the roll, for example, the roll neck, and another component, such as a gearbox or coupling, is positioned between the roll and the motor to transmit the drive torque. According to the principle of action and reaction, the drive torque generated by the motor induces a reaction torque. According to the present invention, the drive device is intended to introduce the motor's reaction torque to the bearing housing of the roll bearing section. The transmission of the motor's reaction torque can be achieved by an indirect coupling of the motor housing with the bearing housing. The indirect coupling of the motor housing can be achieved, for example, through a component positioned between the bearing housing and the motor. For example, the gearbox may be positioned between the bearing housing and the motor, but the motor housing is coupled, for example, to the gearbox housing and even further to the bearing housing. This indirect coupling of the motor housing with the bearing housing allows the weight of the drive unit to be transmitted to the bearing housing, eliminating the load on the rolls or bearing journals.

[0017] According to the present invention, the motor is coupled to a bearing housing, and the motor is coupled to the bearing housing via at least one gearbox. In this way, the reaction torque of the motor can be transmitted to the bearing housing.

[0018] In another advantageous form, a coupling element is arranged between the bearing housing and the gearbox, and the motor is coupled to the bearing housing via the gearbox and the coupling element. This coupling element is formed, for example, as a gear lantern. The coupling element enables the motor to be coupled on the one hand to the gearbox and on the other hand to the bearing housing, and the reaction torque of the motor can be transmitted to the bearing housing of the rolling bearing via the coupling element. Advantageously, a coupling can be arranged inside the coupling element, and via the coupling, the drive torque of the motor can be transmitted from the gearbox to the roll.

[0019] A similarly advantageous form of the drive device is characterized in that the drive torque of the motor acts about the axis of the rotatable roll. Advantageously, the drive axis of the motor and the axis of the rotatable roll are aligned, whereby the drive torque of the motor acts about the axis of the rotatable roll. The drive device is obtained about or along the axis of the rotatable roll. Various components of the drive device, such as for example couplings, coupling elements, gearboxes and motors, are arranged along the axis of the rotatable roll or these components surround the axis of the rotatable roll. If the driven rolls are arranged perpendicular to each other, the individual driven rolls are provided with their own drive device, and the space provided by the efficient arrangement of the components according to the invention along the axis of the rotatable roll can be optimally utilized.

[0020] <An advantageous configuration of the drive device is characterized in that the drive torque of the motor can be transmitted to the roll via a gearbox and a coupling arranged between the gearbox and the roll bearing. According to the invention, the roll is supported via a roll bearing, the bearing housing is coupled to the frame or the base, and the reaction torque of the motor can be introduced into the bearing housing. The bearing of the roll can be carried out, for example, by supporting a roll neck within the roll bearing. The drive torque of the motor is transmitted to the roll, and the reaction torque is transmitted to the bearing housing of the roll. This enables an advantageous modular structure of the drive device and improved accessibility. Particularly advantageous is to arrange the coupling within a coupling element that couples the bearing housing to the gearbox or the motor, and the coupling is formed from a plurality of members. By dissociation of the coupling element from the bearing housing, the coupling element can be removed from the bearing housing together with the gearbox and the motor, at least a part of the coupling remains on the roll, and a second part of the coupling is removable together with the gearbox and the motor.

[0021] According to the present invention , the alignment of the gearbox offset from the axis of the rotatable roll can be compensated by the coupling Therefore , the gearbox transmits the drive torque of the motor centered on the axis of the rotatable roll. In this case, the coupling enables compensation when the alignment is offset from the roll and the gearbox or the motor.

[0022] According to the present inventionThe coupling comprises a first coupling element and a second coupling element, the first coupling element coupled to the roll, the second coupling element coupled to the gearbox, and a third coupling element coupling the first and second coupling elements, the third coupling element being able to compensate for the misalignment of the gearbox from the axis of the rotatable roll. In this case, the first coupling element is fixedly coupled to the roll, and the second coupling element is fixedly coupled to the gearbox. Compensation for the misalignment of the roll and gearbox is performed between the first and third coupling elements and / or by compensation between the second and third coupling elements. This can be easily achieved by gear teeth between the first and third coupling elements or between the second and third coupling elements. The first or second coupling element may have, for example, a coupling hub.

[0023] In another advantageous configuration, the coupling has a shrink disc, and the driving torque of the motor can be transmitted to the roll via the shrink disc, and the shrink disc is coupled to the roll. For example, the shrink disc is shrink-fitted to the roll neck of the roll, and the shrink disc is immovably coupled—for example, by screws—to a first coupling element, such as a first coupling hub.

[0024] The objective of the invention is also a space-saving and easily accessible drive mechanism within a twin-wire press. This is achieved, according to the present invention, by having a twin-wire press with a drive mechanism according to the present invention. Typically, a twin-wire press has a first roll for driving a first wire mesh and a second roll for driving a second wire mesh. The roll arrangement according to the present invention allows for good accessibility, especially when the rolls to be driven are arranged vertically.

[0025] The present invention will be more exemplary explained by the ground. [Brief explanation of the drawing]

[0026] [Figure 1] Conventional drive systems [Figure 2] Roll bearing portion of the drive device according to the present invention [Figure 3] Roll bearing portion and coupling element of the drive device according to the present invention [Figure 4] Roll bearing portion and coupling element of the drive device according to the present invention [Figure 5] Motor, gearbox, and coupling element of the drive device according to the present invention [Figure 6] A coupling element of a drive device according to the present invention, coupled to a bearing housing. [Figure 7] Drive device according to the present invention for rolls arranged vertically [Modes for carrying out the invention]

[0027] Figure 1 shows a conventional drive device. In this case, two rolls 1 and 10 are arranged vertically. Each roll 1 and 10 is supported via a single roll bearing section 3, and the bearing housing 4 of the roll bearing section 3 is coupled to the frame 16. In this case, the drive side of the rolls 1 and 10 is supported by the roll bearing 3 via a roll neck 2, and the gearbox 8 is also arranged vertically according to the vertical arrangement of the rolls 1 and 10 fitted to the roll neck 2, and the reaction torque is received by the coupling of the gearbox 8 by a torque support. Each gearbox 8 is driven by a motor 6 fixed to the frame 16, and the motor 6 transmits the drive torque to the gearbox 8 via a cardan shaft.

[0028] Figure 2 shows the roll bearing section of the drive device according to the present invention. In this case, the rolls 1 and 10, which are rotatable about the shaft 7, are supported via the roll bearing section 3, and the rolls 1 and 10 have a roll neck 2, which is supported by the roll bearing section 3. The roll bearing section 3 has a bearing housing 4, and the roll bearing section 3 or the roll bearing 3 is connected to the frame or base via the bearing housing 4.

[0029] Figure 3 shows the roll bearing section and coupling element of the drive device according to the present invention. In this case, the rolls 1 and 10 are supported via the bearing section 3, and the bearing housing 4 of the roll bearing section 3 is coupled to the frame or base. The drive torque of the motor can be transmitted to the rolls 1 and 10 via the coupling 11, the coupling long 11 having a first coupling element 13, the first coupling element 13 is coupled to the rolls 1 and 10. The first coupling element 13 is formed, for example, as a coupling hub. The coupling further has a shrink disc 12 for transmitting the drive torque of the motor, the shrink disc is coupled to the roll, for example, shrink-fitted to the roll neck 2, and the first coupling element 13 is coupled to the shaft 1 and 10 via the shrink disc 12. The first coupling element 13 is detachably coupled to the shrink disc 12, for example, the coupling element 13 can be screwed to the shrink disc.

[0030] Figure 4 shows the roll bearing section and coupling element of the drive device according to the present invention. In addition to Figure 3, Figure 4 shows a third coupling element 15. In this case, the first coupling element 13 is coupled to the rolls 1 and 10 via a shrink disc 12, and the third coupling element 15 enables the transmission of the drive torque of the motor 6 to the first coupling element 13 and the compensation of the alignment of the gearbox 8 that is misaligned from the shaft 7 of the rotatable rolls 1 and 10. The coupling between the first coupling element 13 and the third coupling element 15 is achieved, for example, by a gear cutting section. With this configuration, the third coupling portion 15 can be easily removed from the first coupling portion 13 which is coupled to the shaft 1 and 10.

[0031] Figure 5 shows the motor, gearbox, and coupling element of the drive device according to the present invention. In this case, the reaction torque of the motor 6 can be transmitted to the gearbox 8, and the housing of the motor 6 is coupled to the housing of the gearbox 8, so that the reaction torque can be transmitted. Furthermore, the driving torque of the motor 6 is transmitted to the gearbox 8 and further to the second coupling element 14. The second coupling element 14 is fixedly coupled to the gearbox 8—for example, by screws—and is formed as, for example, a coupling hub. In this case, the driving torque of the motor 6 acts around the axis 7 of the rotatable rolls 1,10, or the components of the drive device are arranged along the axis 7.

[0032] Figure 6 shows a coupling element coupled to a bearing housing in a drive device according to the present invention. In this case, the coupling element 9 is coupled to the bearing housing 4 on one side and to the gearbox 8 and motor 6 on the other side, and the reaction torque of the motor 6 can be transmitted to the bearing housing 4 via the gearbox 8 and coupling element 9. The coupling element 9 is formed as a gear lantern and is positioned around the shaft 7. An advantage is the transmission of drive torque from the motor 6 to the rolls 1 and 10, where the drive torque is transmitted from the motor 6 to the rolls 1 and 10 via the gearbox 8 and coupling 11, the coupling is positioned inside the coupling element 9, and the drive torque of the motor 6 acts around the shaft 7 of the rotatable rolls 1 and 10.

[0033] Figure 7 shows a drive unit according to the present invention in rolls arranged vertically. In this case, a first roll 1 and a second roll 10 are each illustrated with one drive unit according to the present invention. Rolls 1 and 10 are arranged vertically, which is typical in a twin wire press, where roll 1 is part of the first wire course and roll 10 is part of the second wire course. Thus, rolls 1 and 10 are supported via a roll bearing section 3, which has a bearing housing 4, and the bearing housing is coupled to a frame or base. The components of the drive unit are arranged along an axis 7, and the drive torque of the motor 6 acts around the axis 7 of the rotatable rolls 1 and 10. The drive torque of the motor 6 is transmitted to rolls 1 and 10 via a gearbox 8 and a coupling 11. At the same time, the reaction torque of the motor 6 is transmitted to the gearbox 8 and the coupling element 9It is possible to transmit power to the bearing housing via this. For this reason, the housing of the motor 6 is coupled to the housing of the gearbox 8, which has a coupling element 9, and further coupled to the bearing housing 4. In Figure 7, these coupling parts are shown as screw-fastened parts. Advantageously, the coupling 11 is located inside the coupling element 9. Therefore, it is easy to remove the coupling element 9 together with the gearbox 8 and the motor 6 from the bearing housing, and the coupling 11 is formed from multiple members, and at least one coupling part—for example, a second coupling element 14 that is immovably coupled to the gearbox 8—is removable together with the coupling element 9. Thus, at least one coupling element—for example, a first coupling element 13 that is immovably coupled to the shafts 1 and 10—remains on the shafts 1 and 10.

[0034] The present invention offers many advantages, particularly an effective drive system. This means good access to the components of the drive system, especially to the roll, and the modular structure allows for easy separation of the roll from the rest of the drive system. Thus, the roll becomes accessible without the need to individually remove all other components beforehand, such as couplings, gearboxes, and motors, or to detach other components from the frame or base. At the same time, the drive system according to the present invention allows for minimal load on the shaft because the weight of other components of the drive system and the reaction torque induced by the motor are not transmitted to the shaft. [Explanation of Symbols]

[0035] 1 roll 2 Roll neck 3 Roll bearing section 4 Bearing housing 5 Torque support 6 motors 7 Rotation axis 8 gearbox 9. Connecting elements 10 rolls 11 Couplings 12 Shrink Discs 13. The first coupling element 14. Second coupling element 15. The third coupling element 16 frames

Claims

1. A drive device having a roll (1, 10) rotatable about a shaft (7), a roll bearing unit (3), a bearing housing (4), and a motor (6), in which the roll (1, 10) is supported via the roll bearing unit (3), the bearing housing (4) of the roll bearing unit (3) is connected to a frame (16) or a base, and drive torque of the motor (6) can be transmitted to the roll (1, 10), A drive device characterized in that a motor (6) is directly coupled to a bearing housing (4) of a roll bearing portion (3), a reaction torque of the motor (6) can be transmitted to the bearing housing (4) of the roll bearing portion (3), and the motor (6) is coupled to the bearing housing (4) via at least one gearbox (8).

2. 2. The drive device according to claim 1, characterized in that a coupling element (9) is arranged between the bearing housing (4) and the gearbox (8), and the motor (6) is coupled to the bearing housing (4) via the gearbox (8) and the coupling element (9).

3. 3. The drive device according to claim 2, characterized in that the drive torque of the motor (6) can be transmitted from the motor (6) to the rolls (1, 10) via a coupling (11) arranged inside the coupling element (9).

4. 4. The drive device according to claim 1, wherein the drive torque of the motor (6) can be transmitted to the rolls (1, 10) via a gearbox (8) and a coupling (11) arranged between the gearbox (8) and the roll bearing (3).

5. 5. A drive device according to claim 4, characterized in that the misalignment of the gearbox (8) with respect to the axis (7) of the rotatable roll (1, 10) can be compensated for by means of a coupling (11).

6. 6. A drive device according to claim 4 or 5, characterized in that the coupling (11) comprises a first coupling element (13) and a second coupling element (14), the first coupling element (13) being connected to the roll (1, 10), the second coupling element (14) being connected to the gearbox (8), and a third coupling element (15) connecting the first coupling element (13) and the second coupling element (14), by means of which misalignment of the gearbox (8) from the axis (7) of the rotatable roll (1, 10) can be compensated.

7. 7. The drive device according to claim 4, wherein the coupling (11) has a shrink disk (12), and the drive torque of the motor (6) can be transmitted to the roll (1, 10) via the shrink disk (12), and the shrink disk (12) is connected to the roll (1, 10).

8. 8. Drive device according to any one of claims 1 to 7, characterized in that the drive torque of the motor (6) acts about the axis (7) of the rotatable roll (1, 10).

9. A twin-wire press having a first roll (1) for driving a first mesh and a second roll (10) for driving a second mesh, at least one of the rolls (1, 10) having a drive device according to any one of claims 1 to 8.

10. Use of a drive device according to any one of claims 1 to 8 for driving rolls (1, 10) in a twin-wire press.

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