EP2035155A1 - Dispositif pour générer des vibrations - Google Patents

Dispositif pour générer des vibrations

Info

Publication number
EP2035155A1
EP2035155A1 EP07728455A EP07728455A EP2035155A1 EP 2035155 A1 EP2035155 A1 EP 2035155A1 EP 07728455 A EP07728455 A EP 07728455A EP 07728455 A EP07728455 A EP 07728455A EP 2035155 A1 EP2035155 A1 EP 2035155A1
Authority
EP
European Patent Office
Prior art keywords
rollers
frame
pair
roller
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07728455A
Other languages
German (de)
English (en)
Inventor
Erich Kollmar
Thomas Philippin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Bellmer Maschinenfabrik GmbH
Original Assignee
Gebr Bellmer Maschinenfabrik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebr Bellmer Maschinenfabrik GmbH filed Critical Gebr Bellmer Maschinenfabrik GmbH
Publication of EP2035155A1 publication Critical patent/EP2035155A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/18—Shaking apparatus for wire-cloths and associated parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/166—Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/02—Mechanical driving arrangements

Definitions

  • the present invention relates to an apparatus and a method for generating vibrations, in particular for driving rollers in the paper industry.
  • Vibration excitation of a frame is provided by the fact that an imbalance body is mounted in the frame and is driven to circulate. About bearings that connect the unbalanced body to the frame, the centrifugal forces acting on the unbalance body during circulation are transmitted to the frame, so that this resonates in the same or opposite phase.
  • devices are known in the prior art, which make it possible to design the resulting acceleration of the unbalanced body receiving frame variable, for which purpose the size of the effective unbalance moment is variable.
  • These two partial imbalance bodies typically run with variable phase difference to each other, wherein in the opposite phase circulation with a phase difference of 180 °, the resulting
  • Centrifugal forces of the partial unbalance cancel each other and thus generate no vibration on the frame itself.
  • the centrifugal forces acting on the frame add up so that the movably mounted frame executes a corresponding oscillation along a predetermined direction.
  • the phase difference between the two partial unbalanced bodies can be changed. This can be done according to the prior art, both by manually changing the relative position between the partial imbalance bodies, as well as by a corresponding automated device during operation.
  • an actuating device for this purpose, with which the phase difference between the partial imbalances can be changed via a corresponding gear, in order to change the resulting oscillation of the device.
  • the object of the present invention is to at least partially reduce the disadvantages known in the prior art and, in particular, to provide a compact device for generating oscillations which, especially in the aggressive environmental conditions, such as occur in papermaking, especially in the sheet formation area, reliably and simply to wait is.
  • the object is achieved by a device according to claim 1.
  • the method according to claim 11 solves the above object, wherein preferred embodiments of the device and the method are the subject of the respective subclaims.
  • the device for generating vibrations at least two rotatable pairs of rollers, which are arranged at least in a frame and accommodated in a housing.
  • the rolls or pairs of rolls are arranged substantially parallel to one another with respect to their axes of rotation, each pair of rolls having at least one drive and at least one roll of each pair of rolls comprising an imbalance element.
  • the rollers are preferably rotatably mounted in the frame, wherein the frame is mounted longitudinally displaceable at least in one direction and a
  • Has removal device with which, for example, at least one externally to the device arranged roller is drivable.
  • the device according to the invention is characterized in that the drives for the rollers or pairs of rollers are substantially stationary connected to the housing of the device and the torque of the drive by means of a radially displaceable torque coupling is transmitted to the, with the frame rotatably connected rollers.
  • rollers or pairs of rollers for generating a vibration substantially hollow cylindrical rollers or the like understood, which are arranged rotatably about a rotation axis, wherein at least one roller, preferably a pair of rollers, each with unbalance elements is executed, which is eccentric to the axis of rotation the roller are arranged with a predetermined mass and distance from the axis of rotation.
  • the unbalance elements of the roller pair are designed for each roller as Sectionunwuchtelement, wherein each roller pair unbalance elements are arranged such that cancel at least for a given operating variant, the centrifugal forces generated by the individual unbalance elements due to their superposition or add in at least one other mode and to serve in particular a maximum, acting on the frame centrifugal force and corresponding moment.
  • the moment generated, which is used to drive, for example, a roller is variable as completely variable as possible in a wide range.
  • the phases of the partial imbalance elements of each pair of rollers can be changed during operation at least manually, but preferably also by a corresponding control element.
  • the rollers of each roller pair are arranged substantially parallel to one another, wherein at least one roller of the roller pair has a drive.
  • This drive may be according to the present invention, an electric motor, a hydraulic motor or a pneumatic motor, wherein according to a particularly preferred embodiment of the present invention for driving a roller, a hydraulic motor is used whose speed is variable.
  • the change in the rotational speed can be effected both by a hydraulic control device and by corresponding controls on the hydraulic motor itself.
  • two pairs of rollers each having two rollers are used in the device for generating vibrations, each roller having an imbalance element, and the rollers of each pair of rollers via a gear assembly, such as a gear connection, are rotatably connected preferably changeable and form a group and whose axes of rotation are arranged substantially perpendicular to the main direction of movement of the frame.
  • a gear assembly such as a gear connection
  • the pairs of rollers are rotatably mounted in a longitudinally displaceable frame according to the embodiments described above, wherein the longitudinal displacement of the frame takes place substantially in a direction which is perpendicular to the plane which is spanned by the roller pairs arranged substantially parallel to each other.
  • a movement is understood, which results from a zero position in both the positive and in the negative direction to this zero position along a substantially rectilinear path.
  • this is mounted on a hydrostatic linear guide, which preferably provides a particularly low-wear and low-maintenance storage of the frame.
  • the frame itself has at least one removal device, which is designed for example as a pendulum support and prevents the transmission of lateral forces on the driven roller or at least reduced.
  • the device described above is used for the drive of rolls such as a breast roll in the paper industry, in order to initiate transverse forces, in particular in the paper production in the flowable pulp suspension at the beginning of sheet formation.
  • the aforementioned pendulum support attacks substantially axially on the roller to be moved and transmits in the axial direction, the vibrations generated by the device to the rotating roller.
  • the vibration generated by the device is transferred to the screen and this on the pulp suspension, whereby lateral forces or turbulence in the pulp suspension are generated, which among other things also to a Improvement of the formation of the paper (distribution of the paper components) can be used during sheet formation.
  • the drives for the rollers or pairs of rollers are fixedly connected to the housing. This is done, in particular, from the point of view that in the case of hydraulic drives the wear and the load of the supply services connected to the drive can be reduced or avoided.
  • the drives are preferably non-positively, material or positively connected to the housing directly or indirectly.
  • radially displaceable torque clutches are known in the art and are used as torsionally rigid machine elements for transmitting torques of two shafts, whose escape position is not guaranteed due to operational reasons.
  • they have link groups, which are preferably arranged at an angle of 90 ° to each other, wherein the absolute synchronization of the waves to be connected is ensured by the parallelism within a group.
  • the angular velocity of the specified waves remains constant regardless of the offset.
  • the shaft displacement compensation takes place according to this
  • Torque clutches by a pivoting movement of the preferably parallel pairs of arms, without any restoring forces occur, whereby the shaft bearings of the connected shafts of shear forces are essentially spared.
  • the torque clutches are preferably designed as all-metal clutches and can be used even at very small distances of the shafts to be connected.
  • connection of the torque coupling with the waves is force, positive and / or cohesive, in particular, backlash-free connections are used.
  • the maximum offset of the interconnected shafts should not be exceeded in normal operation.
  • at least one centering device is provided within the housing for the frame, with which the relative orientation of the frame is determined in particular for standstill.
  • the centering device preferably includes a plurality of damping devices selected according to the present invention from a group comprising springs, plastics, hydraulic dampers, pneumatic dampers, combinations thereof, and the like.
  • the damping devices are arranged according to the present invention with respect to the frame and its longitudinal displaceability such that they serve as an energy store in particular for the direction reversal of the frame depending on the relative position of the frame to the housing.
  • the damping devices are arranged in the region of the inflection points of the longitudinally displaceable frame and move during operation of the device with the frame along a predetermined path for energy absorption or in the provision for energy release preferably in the region of inflection points.
  • the length and shape of the damping device and its absorbed energy is designed according to the mass, the stroke and the frequency of the device for generating vibrations.
  • the device has means for determining process parameters of the device, wherein in particular the speed of at least one roller, the phase relationship of the rollers to each other or the rollers, the eccentric center of gravity, the temperature, the lubrication state of the Rolls in the bearings, the vibration, the stroke, combinations thereof and the like, are detected.
  • process parameters of the device wherein in particular the speed of at least one roller, the phase relationship of the rollers to each other or the rollers, the eccentric center of gravity, the temperature, the lubrication state of the Rolls in the bearings, the vibration, the stroke, combinations thereof and the like, are detected.
  • the essential parameters for the generation of the vibration thus also malfunctions can be determined in particular in the field of bearings by, for example, failure of lubrication or increase the temperature in the camps to timely intervention in particular before failure of the device by the staff or by appropriate To enable control systems.
  • the rollers of a pair of rollers are rotatable with each other connected, which, as already stated, both via gear, such as gear connections, as well as by alternative connection systems can be effected.
  • the device also comprises means for controlling and / or regulating the hydraulic drives, with which in addition to a variable load and in particular the rotational speed of the hydraulic drives are controlled or regulated.
  • Control according to the present invention is understood to mean a process in a system in which one or more variables influence input variables, and variables other than output variables, due to the laws peculiar to the system.
  • a rule is also understood to mean a process in which a variable, the variable to be controlled, continuously recorded and compared with another variable, reference variable, and influenced by the result of this comparison in the sense of an alignment with the reference variable.
  • a valve device is preferably used according to the present invention, which controls the hydraulic drives, for example, by the volume flow with a corresponding hydraulic fluid depending on the rotational frequency to be generated and the controlled or controlling phase difference between the two pairs of rollers. It is also within the meaning of the present invention that only a control of the hydraulic drives is made in dependence on predetermined guide values or that corresponding electrical or pneumatic drives are used as an alternative to the hydraulic drives used, the corresponding control and / or regulating device for determining the operating parameters Provide drives.
  • the supply of the necessary hydraulic fluids takes place by means of a central fluid supply device, which is provided in particular for at least one section of a paper machine, such as the sheet forming section.
  • the device for generating vibrations is designed such that the pressure within the housing, which surrounds at least the frame with the corresponding roller pairs, is greater than the ambient pressure in which the device is arranged. This is of particular importance when the device is used in areas where aggressive media are present, as is the case, for example, in papermaking in the field of sheet formation due to the presence of moisture and dirt.
  • the object of the invention is also achieved by a method for generating vibrations, with which in particular rollers are driven in the paper industry.
  • the inventive method has in addition to the drives on a first pair of rollers with a first imbalance, wherein the rollers are connected to the drive via a radially displaceable torque clutch.
  • at least one second pair of rollers is provided which has at least one second imbalance and is also connected to a hydraulic drive via a further radially displaceable torque clutch.
  • the rotational frequency of at least one pair of rollers is determined and the phase difference between the first and second pair of rollers determined. Depending on the phase difference and its variability, the stroke amplitude and the
  • the control and / or regulation for carrying out the method according to the invention is carried out using a central process control system, wherein the determination of the phase difference between the roller pairs or the imbalances recorded herein via the rotational frequency and the relative position of the imbalances to each other.
  • the drives in particular the hydraulic drives, are also used for braking the rotating pairs of rollers, in particular during an emergency shutdown.
  • the method according to the invention is carried out in particular using a device as described above.
  • the use of the device described above for in particular the drive of rolls in the paper industry is within the meaning of the present invention, in particular breast rolls are equipped with the device according to the invention for generating vibrations.
  • Fig. 1 is a schematic side view of the device according to the invention for generating vibrations
  • Fig. 2 is a schematic plan view of an inventive device for generating vibrations with peripheral devices.
  • Fig. 1 shows a preferred embodiment of the device according to the invention for generating vibrations, in which two rotating pairs of rollers 12 are arranged rotatably in a frame 14.
  • Each roller 12 comprises an imbalance element 17.
  • two imbalance elements and their respective rollers belong to one group, the relative position of the imbalance elements having a phase offset of 180 ° relative to one another.
  • the unbalance elements of the left pair of rollers are in the movement position shown here on the furthest distant movement section and the right pair of rollers on the close to each other most located movement section.
  • Both pairs of rollers are provided according to the embodiment shown in the figures with hydraulic drives (see Fig. 2), which are connected via radially displaceable torque clutches.
  • the rotating roller pairs receiving frame 14 is longitudinally displaceable in the housing 16, wherein according to the embodiment shown here, the longitudinally displaceable mounting of the frame 14 is preferably carried out with hydrostatic bearings 19.
  • hydrostatic bearings 19 Of course, it is also within the meaning of the present invention that instead of the hydrostatic bearing appropriate alternative storage systems are used, as they are known in the art.
  • the device according to the invention has at least one centering device 22, with the aid of which the longitudinally displaceable frame is aligned in a predetermined position, preferably a middle position, particularly when the device is switched off.
  • the centering device the lower another serves a variety of
  • Damping devices 24 includes, as energy storage for the turning region of the periodic longitudinal displacement of the frame along its sliding section 30.
  • the damping device is arranged so that it at least in the turning area, i. the portion in which the frame 14 comes closest to the housing 16 in its oscillatory motion, absorbs energy and at the corresponding reversal of motion this is again delivered to the then then sliding back frame.
  • the damping devices are designed such that they provide a sufficient capacity for damping the forces generated by the roller pairs 12 equipped with the imbalance elements 17 in particular even in unforeseen operating conditions. This can be done on the one hand by the number or by the size of the corresponding damping devices 24.
  • the illustrated in Fig. 1 embodiment of the device according to the invention further comprises a removal device 31, which transmits, for example as a pendulum support, the vibration generated by the pairs of rollers and the corresponding longitudinal displacement of the frame 14, for example, a breast roll of a paper machine.
  • a removal device 31 which transmits, for example as a pendulum support, the vibration generated by the pairs of rollers and the corresponding longitudinal displacement of the frame 14, for example, a breast roll of a paper machine.
  • the inventive device can be used in particular for the axial drive of a breast roll in a paper machine, since an improvement of the pulp distribution is achieved by the generated with this device lateral forces in the pulp suspension, which is applied by means of a headbox on the breast roll looping around.
  • At least the pairs of rollers 12 and the frame 14 are received in a housing 16, wherein at least a portion of the respective centering devices 22 and the damping devices 24 is received within the housing 16.
  • a housing 16 is also designed, for example, in stainless steel, in particular to provide improved corrosion resistance of the overall device. Further, elements may be provided within the housing, which serve to reduce the noise emission.
  • FIG. 2 shows a schematic top view of the device according to the invention, wherein in addition to the elements mentioned above, in particular the two drives 18 and the radially displaceable torque coupling 20 can be seen.
  • the position shown in Fig. 2 is substantially the zero position, i. the center position of the pairs of rollers with respect to their longitudinal displaceability reflects, in which the correspondingly driven roller of each roller pair 13 axially aligned with the axis of the drive. Only by the longitudinally displaceable offset of the pairs of rollers during rotation, it also comes to the corresponding axial offset between the drive 18 and the corresponding roller pairs 12, which is compensated according to the present invention by the use of radially displaceable torque clutch 20.
  • the two drives 18 are designed as hydraulic motors, which are connected via the lines 32 and 33 with a corresponding oil supply device.
  • the two hydraulic drives can be controlled separately from each other, whereby in particular the phase offset corresponding to pairs of rollers rotating in operation can be changed relative to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

La présente invention concerne un dispositif pour générer des vibrations, muni d'au moins deux paires de cylindres rotatifs, d'au moins un cadre et un boîtier, les cylindres et/ou les paires de cylindres étant agencés essentiellement parallèlement les uns aux autres par rapport à leurs axes de rotation et chaque paire de cylindres comportant au moins un entraînement. Au moins un cylindre de chaque paire de cylindres comporte au moins un élément de déséquilibre et les cylindres sont montés avec possibilité de rotation dans le cadre pouvant être au moins déplacé longitudinalement, ledit cadre comprenant au moins un dispositif d'enlèvement pour l'entraînement en particulier d'un composant ou d'un sous-groupe dans une machine à papier. Le cadre est agencé à l'intérieur du boîtier et le dispositif est caractérisé en ce que les entraînements pour les cylindres sont reliés essentiellement de manière fixe au boîtier du dispositif, et en que le couple est transmis, au moyen d'un accouplement à couple pouvant être déplacé dans le sens radial, aux cylindres reliés avec possibilité de rotation au cadre pouvant être déplacé longitudinalement.
EP07728455A 2006-06-26 2007-04-24 Dispositif pour générer des vibrations Withdrawn EP2035155A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610029241 DE102006029241A1 (de) 2006-06-26 2006-06-26 Vorrichtung zum Erzeugen von Schwingungen
PCT/EP2007/053999 WO2008000535A1 (fr) 2006-06-26 2007-04-24 Dispositif pour générer des vibrations

Publications (1)

Publication Number Publication Date
EP2035155A1 true EP2035155A1 (fr) 2009-03-18

Family

ID=38327016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07728455A Withdrawn EP2035155A1 (fr) 2006-06-26 2007-04-24 Dispositif pour générer des vibrations

Country Status (3)

Country Link
EP (1) EP2035155A1 (fr)
DE (1) DE102006029241A1 (fr)
WO (1) WO2008000535A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103203313B (zh) * 2013-02-28 2015-03-11 华南理工大学 轴向推力旋转滚子激振式机械振动装置
DE102013020690A1 (de) * 2013-12-03 2015-06-03 Bomag Gmbh Schwingungserreger für einen Vibrationsverdichter sowie Baumaschine mit einem solchen Schwingungserreger
CN103966880B (zh) * 2014-05-15 2015-11-18 杭州豪荣科技有限公司 摇振机振幅调节装置
GB2573535B (en) * 2018-05-08 2021-05-05 Terex Gb Ltd Adjustable vibratory drive system
CN110777555A (zh) * 2019-10-28 2020-02-11 华南理工大学 一种无后座力摇振装置及振幅调节方法
CN110777556A (zh) * 2019-10-28 2020-02-11 华南理工大学 一种胸辊摇振装置及振幅调节方法

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DE3341084A1 (de) * 1983-11-12 1985-05-30 Josef-Gerhard 4030 Ratingen Tünkers Vibrationsramme zum rammen und ziehen
DE3806897A1 (de) * 1988-03-03 1989-09-14 Wacker Werke Kg Schwingungserreger
DE9116345U1 (fr) * 1989-12-20 1992-10-22 Gedib Ingenieurbuero Und Innovations-Beratung Gmbh, 5920 Bad Berleburg, De
DE4116647C5 (de) * 1991-05-22 2004-07-08 Hess Maschinenfabrik Gmbh & Co. Kg Rüttelvorrichtung
DE9312846U1 (de) * 1993-08-27 1993-10-28 Tuenkers Maschinenbau Gmbh Vibrationsbär zum Rammen und/oder Ziehen von Rammgütern
FR2722444B1 (fr) * 1994-07-13 1996-08-23 Ancrenaz Daniel Dispositif de vibration pour table de presse utilisee pour la fabrication de produits en beton
DE19704730A1 (de) * 1997-02-07 1998-08-13 Voith Sulzer Papiermasch Gmbh Schüttelvorrichtung
JP2002514502A (ja) * 1998-05-08 2002-05-21 ゲディプ・インジェニールビューロ・ウント・イノバツィオーンスベラトゥング・ゲーエムベーハー 不平衡指向性振動子のための調整装置を動作させるための方法
FI117293B (fi) * 2003-12-18 2006-08-31 Metso Paper Inc Laitteisto paperikoneen telan liikuttamiseksi
DE102004037993A1 (de) * 2004-08-05 2006-03-16 Voith Paper Patent Gmbh Schüttelvorrichtung
DE202004014585U1 (de) * 2004-09-16 2006-01-26 Weber Maschinentechnik Gmbh Schwingungserreger

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Also Published As

Publication number Publication date
WO2008000535A1 (fr) 2008-01-03
DE102006029241A1 (de) 2007-12-27

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