EP4183924A1 - Bodenbearbeitungswalze und verfahren zum betreiben einer bodenbearbeitungswalze - Google Patents

Bodenbearbeitungswalze und verfahren zum betreiben einer bodenbearbeitungswalze Download PDF

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Publication number
EP4183924A1
EP4183924A1 EP22202044.8A EP22202044A EP4183924A1 EP 4183924 A1 EP4183924 A1 EP 4183924A1 EP 22202044 A EP22202044 A EP 22202044A EP 4183924 A1 EP4183924 A1 EP 4183924A1
Authority
EP
European Patent Office
Prior art keywords
unbalanced
mass
unbalance
drive motor
roller
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.)
Pending
Application number
EP22202044.8A
Other languages
German (de)
English (en)
French (fr)
Inventor
Josef DAGNER
Stefan BRAUNSCHLÄGER
Stefan Bäuml
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.)
Hamm AG
Original Assignee
Hamm AG
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 Hamm AG filed Critical Hamm AG
Publication of EP4183924A1 publication Critical patent/EP4183924A1/de
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/28—Vibrated rollers or rollers subjected to impacts, e.g. hammering blows
    • E01C19/286—Vibration or impact-imparting means; Arrangement, mounting or adjustment thereof; Construction or mounting of the rolling elements, transmission or drive thereto, e.g. to vibrator mounted inside the roll
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting

Definitions

  • the present invention relates to a soil tillage roller which can be used in a soil tillage machine, for example a soil compactor, to till soil, in particular to compact it.
  • the invention further relates to a method for operating such a soil tillage roller or a soil tillage machine having such a soil tillage roller.
  • a soil tillage roller which can be used as a compactor roller in a soil tillage machine constructed as a soil compactor, for example, can have an unbalanced arrangement with at least one unbalanced mass rotatable about an unbalanced axis of rotation. If the unbalanced axis of rotation corresponds to the axis of rotation of the soil tillage roller, the at least one rotating unbalanced mass exerts a force that is orthogonal to the axis of rotation of the soil tillage roller and the soil tillage roller is thus set into a periodic vibration movement that is essentially orthogonal to the axis of rotation of the soil tillage roller.
  • the rotating unbalances can exert a periodically changing torque on the soil tillage roller that is oriented essentially tangentially with respect to the axis of rotation of the soil tillage roller , to set the soil tillage roller in a periodic oscillating motion.
  • an unbalanced electric drive motor can be provided in association with a soil cultivating roller, by means of which the at least one unbalanced mass is driven to rotate can be.
  • the unbalance arrangement When the unbalance arrangement is deactivated and the unbalance electric drive motor is therefore not excited, it generates neither a drive torque nor a braking torque, so that an unbalance mass that is fundamentally to be driven to rotate by it will position itself in a rest position of minimal potential energy, in which the center of mass of such an unbalance mass is essentially vertical is positioned under the axis of rotation of the unbalance.
  • An unbalanced mass will move into this rest position if, starting from an operating state in which the unbalanced mass rotates at an operating speed about the associated unbalanced axis of rotation, the associated unbalanced electric drive motor is deactivated.
  • an unbalanced mass which is generally not subjected to a braking torque, oscillates around the rest position at a comparatively low frequency and with decreasing amplitude, which can be felt by a corresponding vibration on the soil tillage roller or soil tillage machine .
  • a soil tillage roller for a soil tillage machine comprising a roller shell that is elongated in the direction of a roller axis of rotation and surrounds a roller interior and an unbalanced arrangement arranged at least partially in the roller interior, the unbalanced arrangement being at least one by one Unbalanced axis of rotation, rotatable unbalanced mass with a center of gravity eccentric to the unbalanced axis of rotation and an unbalanced drive system with at least one unbalanced electric drive motor for driving the at least one unbalanced mass to rotate about the unbalanced axis of rotation, with the at least one unbalanced mass im Is essentially in a rest position, the unbalance drive system being designed to operate the at least one unbalance electric drive motor upon deactivation of the unbalance arrangement in an unbalance return phase such that the at least one unbalance mass is moved into the rest position
  • an unbalanced mass is prevented from oscillating when the unbalanced arrangement is deactivated, i.e. when the transition to a rest state, in that the at least one unbalanced mass is moved in a defined manner into the rest position, i.e. the state of minimum potential energy, by corresponding operation of the unbalanced electric drive motor becomes.
  • the at least one unbalanced mass is moved from a state of higher potential energy, i.e. a state in which the center of mass of the at least one unbalanced mass is higher than in the rest position, in a substantially continuous lowering movement in the direction of the rest position.
  • the imbalance drive system can be designed to move the at least one imbalance mass from a deflected position into the rest position when the imbalance arrangement is deactivated.
  • the at least one unbalanced mass is thus brought into the state of lower or minimal potential energy by operating the associated unbalanced electric drive motor between two positions, namely the deflection position on the one hand and the rest position on the other hand, without a pendulum movement.
  • the center of mass of the at least one unbalanced mass In the rest position, the center of mass of the at least one unbalanced mass can be positioned essentially vertically below the axis of rotation of the unbalanced mass in a vertical direction, i.e. assume the state of minimum potential energy, while in the deflection position the center of mass of the at least one unbalanced mass can be deflected at a deflection angle from the rest position.
  • the unbalanced drive system be designed to, upon deactivation of the Unbalanced arrangement, in particular at the beginning of the unbalanced return phase, to operate the at least one unbalanced electric drive motor to generate a holding torque.
  • the unbalanced drive system can be designed to conduct a holding current through the at least one unbalanced electric drive motor in order to generate the holding torque.
  • the unbalanced drive system can be designed to, in an unbalanced Braking phase to operate the unbalanced electric drive motor for generating a braking torque to reduce a speed of the at least one unbalanced mass, starting from an operating speed.
  • this imbalance braking phase can serve to move the at least one imbalance mass into the deflection position or to position it in the area of the deflection position, so that the at least one imbalance mass in the deflection position essentially comes to rest.
  • the braking torque be greater than the holding torque.
  • the braking torque can be in the range of the maximum braking torque that can be generated by the unbalance electric drive motor.
  • the unbalance drive system can be designed to operate the at least one unbalance electric drive motor to generate the holding torque when a transition speed is reached and/or when a predetermined braking time has elapsed since the start of the unbalance braking phase.
  • the transition speed can be zero, for example. This means that in the unbalanced braking phase, the at least one unbalanced mass practically is brought to a standstill and is positioned in the deflection position at the end of the unbalance braking phase or only moves at a very low speed in the area of the deflection position.
  • the holding torque is exerted by the at least one unbalanced mass when the at least one unbalanced mass is positioned at a
  • the reference deflection angle preferably being in the range of 90° with respect to the rest position. In this way, the at least one unbalanced mass is prevented from suddenly falling down because the holding torque is too low.
  • the unbalanced drive system can be designed to, with at least one unbalanced mass positioned in the deflection position, use the at least one unbalanced electric drive motor to reduce the torque generated by the at least one unbalanced electric drive motor, starting from the holding torque.
  • the lowering of the torque, starting from the holding torque can be achieved, for example, by the unbalanced drive system being designed to lower the current conducted through the unbalanced electric drive motor, starting from the holding current.
  • the unbalanced axis of rotation can correspond to at least one unbalanced mass, preferably every unbalanced mass, of the roller axis of rotation. If a soil tillage roller is to be set into an oscillating movement, it can alternatively or additionally be provided that the unbalanced axis of rotation of at least one unbalanced mass, preferably each unbalanced mass, is offset and arranged parallel to the roller axis of rotation.
  • the invention also relates to a soil tillage machine, preferably a soil compactor, comprising at least one soil tillage roller constructed according to the invention.
  • a soil treatment machine designed as a soil compactor is generally denoted by 10 .
  • the soil cultivating machine 10 comprises on a rear carriage 12 a soil cultivating roller 14 which can be rotated about a roller axis of rotation D 1 and has a roller jacket 18 enclosing a roller interior 16
  • Rear carriage 12 for steering the soil cultivating machine 10 articulated front carriage 22 the soil cultivating machine 10 has a further soil cultivating roller 24 with a roller interior 28 enclosed by a roller jacket 26.
  • a control station 30 from which an operator can operate the soil tillage machine 10, for example to move it over a soil to be compacted, such as. B. asphalt material to move.
  • both soil tillage rollers 14 can be driven to rotate about their roller axes of rotation D 1 , D 2 .
  • an electrohydraulic drive system with a hydraulic drive pump driven by an electric motor and a hydraulic drive motor assigned to each soil tillage roller 14 can be provided.
  • the unbalance arrangement 32 assigned to the soil tillage roller 14 comprises at least one unbalance mass 36 that can be driven to rotate about an unbalance axis of rotation U that corresponds to the roller axis of rotation D 1 in the example shown and that has a center of mass M that is eccentric to the unbalance axis of rotation U. It should be pointed out that in 2 the unbalanced mass 36 is shown positioned in two rotational positions about the unbalanced axis of rotation U, which will be explained below. It should also be pointed out that, for example, several such imbalance masses 36 in Direction of the unbalance axis of rotation U can be arranged in succession in the roll interior 16.
  • the unbalanced mass 36 is associated with an unbalanced electric drive motor 38 , for example also arranged in the roller interior 16 .
  • This can be fed from a battery, a fuel cell or the like provided on the soil compactor 10 and can drive the associated unbalanced mass 36 to rotate about the unbalanced axis of rotation U during soil processing operation, for example when compacting asphalt material or the like.
  • the unbalanced electric drive motor 38 can be provided to drive a plurality of unbalanced masses 36 arranged one after the other in the direction of the unbalanced axis of rotation U, for example.
  • the unbalanced electric drive motor 38 is preferably a three-phase electric motor which is controlled by an inverter and is supplied with the required voltage or current by means of the inverter for rotation at a desired speed or a desired torque becomes.
  • the unbalance electric drive motor 38 drives the unbalance mass 36 to rotate about the unbalance axis of rotation U at up to several thousand revolutions per minute.
  • a force that is essentially orthogonal with respect to the roller axis of rotation D 1 is exerted on the soil tillage roller 14 and sets it in a periodic vibrating motion.
  • the rotational speed of the unbalanced mass 36 about the unbalanced axis of rotation U is first reduced, for example at the beginning of the deactivation in an unbalanced braking phase.
  • the unbalanced electric drive motor 38 can be operated as a generator in order to get out of the decreasing kinetic energy of the unbalanced mass 36 to gain electrical energy and feed it into an energy store, for example a battery provided on the tillage machine 10 .
  • the unbalanced electric drive motor 38 can be operated in a braking mode, in which a braking torque counteracting the rotation of the unbalanced mass 36 is generated by energizing it.
  • the unbalanced electric drive motor 38 could also be operated in generator mode or in braking mode in different partial phases of the unbalanced braking phase.
  • the unbalanced electric drive motor 38 can be controlled in the unbalanced braking phase, for example to generate a maximum possible braking torque, with the further requirement that a speed in the region of zero is to be achieved as the setpoint speed .
  • the unbalanced mass 36 At the end of the unbalanced braking phase, ie when a transition speed in the region of zero is reached, the unbalanced mass 36 is in a fundamentally unknown deflection position.
  • the unbalanced mass 36 or its center of mass could be in an 2 rest position illustrated below, in which the center of mass M of the unbalanced mass 36 is positioned essentially vertically under the roller axis of rotation D 1 .
  • the unbalanced mass 36 will be positioned at the end of the unbalanced braking phase in a deflection position that does not correspond to the rest position and would be in this position if the unbalanced electric drive motor 38 was activated further with the specification that the target speed of the unbalanced mass 36 should be zero deflection position are held.
  • an unbalanced drive system 40 comprising, for example, the unbalanced electric drive motor 38 and an associated control unit goes into an unbalanced return phase in order to prevent oscillation and to avoid the unbalanced mass 36 swinging out.
  • the unbalanced mass 36 would execute a pendulum movement about the unbalanced axis of rotation U, i.e. no longer move past a top dead center of the circular movement.
  • This pendulum movement would continue with decreasing amplitude until the unbalanced mass 36 in 2 occupies the positioning shown below, in which the center of gravity M of the unbalanced mass 36 is positioned directly, ie vertically below the axis of rotation U of the unbalanced mass, in the direction of a vertical line V, ie in the direction of gravity.
  • the unbalanced mass 36 is or remains in this position, which corresponds to the rest position of the unbalanced mass 36, even when the unbalanced arrangement 32 or the unbalanced drive system 40 is deactivated.
  • the unbalanced electric drive motor 38 is energized during the transition to the unbalanced return phase in such a way that it generates a defined holding torque.
  • the holding torque is generally smaller than the maximum braking torque generated or that can be generated in the unbalanced braking phase and is defined, for example, in such a way that, when the holding torque is generated by the unbalanced electric drive motor 38, the unbalanced mass 36 remains or is held in the deflected position deflected from the rest position can be.
  • a torque is generated as the holding torque, which is so large that even if the deflection position has a reference deflection angle of 90° with respect to the rest position, the unbalanced mass 26 will not move in the direction of the rest position ..
  • the unbalanced mass 36 is positioned in such a way that the center of mass M of the same intersects the unbalanced axis of rotation U horizontal line H lies. This is a state in which, due to a maximum effective lever E between the unbalanced axis of rotation U and the center of mass M in the gravitational field, the unbalanced mass 36 generates a maximum torque counteracting or corresponding to the holding torque.
  • the unbalanced mass will initially remain in the deflected position. Starting from this state, the torque generated by the unbalance drive electric motor 38, starting from the holding torque, is then gradually reduced in the unbalance return phase. This is done by lowering the electrical current passed through the unbalanced electric drive motor 38 . Due to the linearly reduced torque or current, for example, the unbalanced mass 36 will, starting from the deflection position initially assumed, gradually move downwards towards the rest position and this will then occur when the torque generated by the unbalanced electric drive motor 38 has been reduced to a value of zero is to be at rest.
  • the unbalanced mass 36 When the torque provided by the unbalanced electric drive motor 38 is reduced from the holding torque to a value of zero, the unbalanced mass 36 is gradually and essentially continuously returned to the rest position without oscillating movement, so that essentially no overshoot or movement beyond the rest position takes place. The unbalanced mass 36 is therefore returned to the rest position without a perceptible pendulum movement on the soil treatment machine 10 . If this state is reached, the operation of the unbalanced drive system 40 is stopped or the unbalanced electric drive motor 38 is no longer subjected to a voltage, so that it is de-energized and does not generate any torque acting on the unbalanced mass 36 . Due to the force of gravity, the unbalanced mass 36 will remain in its rest position, in which it or its center of mass M assumes the position of minimum potential energy.
  • a particular advantage of the configuration of a soil tillage roller 14 or 24 according to the invention is that the transfer of an unbalanced mass 36 to a rest position can take place regardless of whether the soil tillage machine 10 is standing on a ground that is oriented horizontally in the gravitational field or on an inclined ground.
  • the unbalanced mass 36 In the rest position and with the unbalanced electric drive motor 38 deactivated, the unbalanced mass 36 will always assume the state of lowest potential energy, in which its center of mass M is positioned vertically, ie in the direction of gravity below the axis of rotation U of the unbalanced mass. No sensors are required to provide information about the slope of the ground on which the soil treatment machine 10 is located.
  • the holding torque to be generated by the unbalanced electric drive motor 38 can also be smaller, for example, than that for holding an unbalanced mass 36 in the 2 illustrated state with maximum torque generated by this holding torque required.
  • the time duration of the imbalance recovery phase can be shortened.
  • the duration of the unbalance return phase can also be shortened by, for example, deviating from a linear reduction in the torque, starting from the holding torque, by first reducing the torque or the current conducted through the unbalance electric drive motor 38 more quickly at the beginning of the unbalance return phase than at the end of the unbalance recovery phase.
  • the holding torque at the beginning of the unbalance return phase is generated in that direction about the unbalance axis of rotation U, which ensures that the unbalance mass 36 does not fall back into the rest position or is accelerated towards the rest position.
  • the holding torque is therefore generated in a clockwise direction. If the imbalance mass were 36 in 2 positioned to the right of the unbalance axis of rotation U, the holding torque would be generated counterclockwise.
  • the principles of the present invention can be used not only in an unbalanced arrangement intended to generate a vibrating movement, but also, for example, in an unbalanced arrangement in which, for example, two unbalanced masses with an unbalanced rotational axis that is offset and parallel to the rotational axis of the roll, for example, are mutually offset with respect to the rotational axis of the roll are arranged diametrically opposite.
  • unbalanced rotary axes of this type that are eccentric to the axis of rotation of the roller, the unbalanced masses will position themselves in the state of minimum potential energy when the unbalanced electric drive motor or unbalanced electric drive motors are not activated. In such arrangements, too, the procedure described above can be used to avoid a swinging motion of the unbalanced masses.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)
EP22202044.8A 2021-11-19 2022-10-18 Bodenbearbeitungswalze und verfahren zum betreiben einer bodenbearbeitungswalze Pending EP4183924A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021130259.5A DE102021130259A1 (de) 2021-11-19 2021-11-19 Bodenbearbeitungswalze und Verfahren zum Betreiben einer Bodenbearbeitungswalze

Publications (1)

Publication Number Publication Date
EP4183924A1 true EP4183924A1 (de) 2023-05-24

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ID=83898396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22202044.8A Pending EP4183924A1 (de) 2021-11-19 2022-10-18 Bodenbearbeitungswalze und verfahren zum betreiben einer bodenbearbeitungswalze

Country Status (5)

Country Link
US (1) US20230160154A1 (ja)
EP (1) EP4183924A1 (ja)
JP (1) JP7318092B2 (ja)
CN (2) CN116145505A (ja)
DE (1) DE102021130259A1 (ja)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224293B1 (en) * 1999-04-19 2001-05-01 Compaction America, Inc. Variable amplitude vibration generator for compaction machine
CN104480839A (zh) * 2014-12-10 2015-04-01 厦工(三明)重型机器有限公司 一种无级调幅激振器及振动压路机
DE102019002439A1 (de) * 2019-04-03 2020-10-08 Bomag Gmbh Bodenverdichtungsmaschine mit elektrischem Motor und Verfahren zum Betrieb

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2733733B2 (ja) * 1993-12-28 1998-03-30 酒井重工業株式会社 振動ローラの起振方法およびその装置
JP6009026B1 (ja) 2015-04-01 2016-10-19 酒井重工業株式会社 振動ローラ
DE102016109888A1 (de) 2016-05-30 2017-11-30 Hamm Ag Bodenverdichter und Verfahren zum Betreiben eines Bodenverdichters

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6224293B1 (en) * 1999-04-19 2001-05-01 Compaction America, Inc. Variable amplitude vibration generator for compaction machine
CN104480839A (zh) * 2014-12-10 2015-04-01 厦工(三明)重型机器有限公司 一种无级调幅激振器及振动压路机
DE102019002439A1 (de) * 2019-04-03 2020-10-08 Bomag Gmbh Bodenverdichtungsmaschine mit elektrischem Motor und Verfahren zum Betrieb

Also Published As

Publication number Publication date
CN219862224U (zh) 2023-10-20
DE102021130259A1 (de) 2023-05-25
CN116145505A (zh) 2023-05-23
JP2023075944A (ja) 2023-05-31
JP7318092B2 (ja) 2023-07-31
US20230160154A1 (en) 2023-05-25

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