EP3290386A1 - Entrainement hydraulique de dispositif de rotation - Google Patents

Entrainement hydraulique de dispositif de rotation Download PDF

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Publication number
EP3290386A1
EP3290386A1 EP16186249.5A EP16186249A EP3290386A1 EP 3290386 A1 EP3290386 A1 EP 3290386A1 EP 16186249 A EP16186249 A EP 16186249A EP 3290386 A1 EP3290386 A1 EP 3290386A1
Authority
EP
European Patent Office
Prior art keywords
functional unit
slewing
hydraulic motor
hydraulic oil
drive
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Withdrawn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
EP16186249.5A
Other languages
German (de)
English (en)
Inventor
Benjamin Stegmeier
Roman Zirbs
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.)
Putzmeister Engineering GmbH
Original Assignee
Putzmeister Engineering 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 Putzmeister Engineering GmbH filed Critical Putzmeister Engineering GmbH
Priority to EP16186249.5A priority Critical patent/EP3290386A1/fr
Priority to PCT/EP2017/071695 priority patent/WO2018041856A1/fr
Publication of EP3290386A1 publication Critical patent/EP3290386A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B66C23/86—Slewing gear hydraulically actuated
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms

Definitions

  • the invention relates to a slewing gear drive in particular for the distribution boom of a mobile concrete pump and a concrete pump with swiveling distribution boom.
  • Work machines with a boom mounted on a substructure usually have drives and actuators for moving the boom.
  • An example of a working machine with a corresponding boom are mobile concrete pumps, in which a boom is provided with a conveying line guided along it, through which flowable concrete can be pumped.
  • a rotary drive is provided regularly, which is often a hydraulic rotary drive.
  • a hydraulic rotary drive comprises a hydraulic motor, which can convert hydraulic energy into a rotary movement with appropriately controlled supply of pressurized hydraulic oil, which is converted into the desired pivoting movement, possibly via a transmission. Since a corresponding hydraulic motor is always switched pressure-free in peace and thus unfolds virtually no braking effect, with which the boom could be secured in a desired position, the hydraulic drive for securing the rotary drive at rest further comprises a friction brake, with the Rotary drive can be fixed in its respective position.
  • the invention has for its object to provide a slewing drive and a concrete pump with a pivoting distributor boom, in which the risks mentioned are reduced.
  • the invention relates to a slewing drive, in particular for the distribution boom of mobile concrete pumps, with a hydraulic motor and a friction brake for setting the slewing drive in case of inactivity of the hydraulic motor, wherein the slew drive further comprises a functional unit with which in the event of slippage of the friction brake of the inactive switched Hydraulic motor through the functional unit subsidized hydraulic oil flow is limited to a predetermined volume flow.
  • the invention further relates to a concrete pump with a relative to a substructure via a slewing in azimuth direction pivoting distribution boom, the slewing comprises a slewing drive according to the invention.
  • mobile concrete pumps with distribution boom all built on a truck or similar vehicles machines for conveying flowable concrete by conveying lines are referred to, in which the delivery lines are at least partially performed on a distribution boom.
  • mobile concrete pumps with distributor boom are therefore truck-mounted concrete pumps and truck mixers with distributor masts (PUMI).
  • a “distribution boom” is a power-operated, pivoting device consisting of one or more extendable or foldable parts with a delivery line for the passage of flowable concrete called.
  • the distribution boom is mounted on a "substructure", which forms the support structure for the distribution boom.
  • a “slewing gear” is provided with which the distributor mast can be pivoted relative to the substructure, for example, by +/- 360 °.
  • the slewing gear comprises a toothed rotary bearing, which is connected to the distributor boom and designated as a "turntable”, in the toothing of which a slewing gear drive connected to the substructure engages.
  • overload case is hereinafter referred to an extraordinary operating condition in which loads act on the distributor boom, which can not be completely absorbed by the friction brake, so that there is an undesirable movement of the distributor boom.
  • the loads leading to an overload case can result in particular from wind forces acting on the distributor boom.
  • a hydraulic motor is “inactive” or “inactive” when there is no pressure difference between the motor connections for the hydraulic oil and a rotational movement of the hydraulic motor. If the shaft of the motor is rotated in an inactive hydraulic motor, the hydraulic motor will immediately act as a pump. In contrast, a hydraulic motor is “active” or “active” when hydraulic pressure resulting from a pressure difference is converted into mechanical energy in the form of a rotational movement. The direction of rotation of the hydraulic motor can be selected via the direction of the applied pressure gradient.
  • the invention is based on the finding that, in the case of a movement of the distributor mast around the axis of the slewing gear resulting from an overload, the inactive hydraulic motor of the slewing drive inevitably co-rotates, whereby the hydraulic motor then delivers hydraulic oil as a pump.
  • an additional braking torque can be generated by the hydraulic motor in the slew drive, which supports the due to the sliding friction against the stiction reduced braking effect of the slipping friction brake.
  • this hydraulic oil flow can be the maximum Defining the rotational speed of the hydraulic motor in case of overload, which can be limited in the consequence also the uncontrolled from the prior art movement of a boom in case of overload, at least in terms of speed of rotation.
  • the rotational movement braked so that the friction brake can be transferred to the occurrence of an overload case back to the state of stiction and the distributor boom is stopped.
  • the hydraulic oil delivered by the inactive switched hydraulic motor in case of overload is conveyed into a tank, wherein the functional unit is then arranged in the flow channel between the hydraulic motor and the tank.
  • the slewing drive preferably has a Nachsaugfunktion, via which a sufficient supply of the hydraulic motor is ensured with hydraulic oil and idling of the hydraulic motor is prevented.
  • the functional unit comprises a controllable locking device, with which a flow of hydraulic oil through the functional unit can optionally be prevented.
  • a suitably controlled blocking of the flow through the functional unit can be ensured that the hydraulic motor with active control in a known manner can be used as a drive, without causing hydraulic oil flows through the functional unit in the tank.
  • the flow of hydraulic oil through the functional unit is to be prevented, while in the case of inactivity, the hydraulic oil can flow through the functional unit.
  • the functional unit may comprise a flow valve.
  • the flow control valve may have a constant unchangeable cross-section which is determined solely by the construction of the valve. But it is also possible that the cross section of the flow control valve is adjustable. If a manual adjustability is provided, the cross-section of the valve can be adjusted in particular before the first startup and / or subsequent maintenance, but remains constant during the operation of the slew drive. If the cross-section of the flow control valve can be actively controlled, the cross-section and thus the given flow rate can be changed as planned during the operation of the slewing gear drive.
  • the flow control valve may be a throttle valve or an orifice valve.
  • the functional unit may also comprise a controlled proportional valve for limiting the volume flow.
  • a controlled proportional valve for limiting the volume flow.
  • the blocking device, the flow control valve and / or the proportional valve of the functional unit are preferably hydraulically controllable via control lines or electrically.
  • control lines and / or a control device provided, which are designed for the above-described control of the individual components.
  • mobile concrete pump 1 with distribution boom 2 is a truck-mounted concrete pump, in which the distribution boom 2 mounted on a mobile base 3 is.
  • the distribution boom 2 comprises a plurality of foldable by hydraulic cylinder 4 parts 5, in which a (only partially shown) conveying line 6 is guided for flowable concrete.
  • a (only partially shown) conveying line 6 is guided for flowable concrete.
  • a slewing gear 10 is provided, which in FIG. 1 Also shown as isolated detail.
  • the distribution boom 2 with respect to the substructure 3 can be arbitrarily rotated by +/- 360 °.
  • the slewing gear 10 comprises a pivot bearing 11, which is arranged in the installed state between distributor boom 2 and substructure 3.
  • the part of the rotary bearing 11, which is connected to the distributor boom 2 has an external toothing 12, in which a drive pinion 13 of a slewing drive 14 engages.
  • the slew drive 14 is operated hydraulically.
  • the delivery line 6 can be guided centrally through the pivot bearing 11 (not shown).
  • FIG. 2 is the circuit diagram of a first embodiment of the invention of the slew drive 14 from FIG. 1 shown.
  • the slewing drive 14 includes a hydraulic motor 15 and a hydraulically controlled friction brake 16, which always unfolds its braking action on the slewing drive 14 when it is depressurized. Not shown is a possibly between the hydraulic motor 15 and the drive pinion 13 of the slewing drive 14 (see. FIG. 1 ) provided gear.
  • the 4/3-way valve 17 has a standard pressure port P, a tank port T and two working ports A, B.
  • the working ports A, B are relieved of pressure, if necessary to suck up hydraulic oil but with the pot connection T. connected (see in FIG. 2 shown middle position), or between the working ports there is a pressure difference substantially corresponding to the pressure difference between pressure port P and tank port T.
  • valve unit 18 Between the 4/3-way valve 17 and the hydraulic motor 15, a valve unit 18 is provided.
  • the valve unit 18 comprises a known arrangement of check valves 19 and overload valves 20 to prevent overpressures on the hydraulic motor 15.
  • a shuttle valve 21 On the 4/3-way valve 17 side facing the valve unit 18, a shuttle valve 21 is further provided that between the working outlets A, B coming lines is arranged and can flow freely through the excess hydraulic oil in inactivity of the hydraulic motor 15 in a hydraulic oil tank 22.
  • the hydraulic oil tank 22 may of course be the tank which is connected to the tank connection T of the 4/3-way valve 17.
  • the functional unit 25 comprises a flow valve 26 designed as a throttle valve with an invariable cross-section Limiting the volume flow through the functional unit 25 and a controllable via a control line 27 'locking device 27, so that a flow of hydraulic oil through the functional unit 25 can be selectively prevented.
  • the control line 27 ' is connected to the supply line to the friction brake 16, so that the locking device 27 in the case in which the friction brake 16 is released due to an active circuit of the hydraulic motor 15, the flow of prevented by the functional unit 25, in the case of tightened friction brake 16, however, allows.
  • the functional unit 25 locks with active switching of the hydraulic motor 15
  • the operation of the slewing drive 14 during active rotation of the distributor boom 2 relative to the substructure 3 is not affected.
  • the functional unit 25 the behavior of the slewing gear drive 14 in case of overload - ie inactive hydraulic motor 15 and slipping of the friction brake 16 - significantly improved.
  • the hydraulic motor 15 In the case of slipping of the friction brake 16, the hydraulic motor 15 is set in rotation. The hydraulic motor 15 then acts as a pump for the hydraulic oil and delivers the hydraulic oil via the second shuttle valve 24 through the functional unit 25, the locking device 27 is opened in this case as described, in the hydraulic oil tank 22. Due to the flow control valve 26 of the hydraulic motor 15th funded volumetric flow, however, limited, resulting in an additional braking torque on the hydraulic motor 15, which counteracts the unwanted movement of the rotating mechanism in case of overload. The described braking torque is in particular dependent on the throttling action of the flow control valve 26.
  • hydraulic motor 15 conveys hydraulic oil through the functional unit 25 into the hydraulic oil tank as described, hydraulic oil is simultaneously sucked in via the tank connection T of the 4/3-way valve 17, so that the hydraulic lines of the slewing drive are continuously filled with hydraulic oil.
  • FIGS. 3, 4a, b and 5a Variants are shown to the first embodiment of the slewing drive 14 shown in Figure 2.
  • FIGS. 3, 4a, b and 5a b was further dispensed with the representation of the 4/3-way valve 17 with floating center position and only the Schwarzenberg A, B indicated.
  • the flow control valve 26 is designed to limit the volume flow through the functional unit 25 as a throttle valve with manually adjustable cross-section.
  • the cross-section of the flow control valve 26 can thus be checked, for example, before the first start-up and during maintenance of the rotary drive 14 and, if necessary, readjusted.
  • control of the 3/2-way valve 23 (see. FIG. 4a ) or the 3/2-way valve 23 and the locking device 27 of the functional unit 25 (see. FIG. 4b ) instead of control lines 23 ', 27' (see. FIG. 2 ) Electromagnetically.
  • the control takes place on the basis of electrical pulses, which are generated by a control unit, not shown.
  • Proportional valve 28 is provided, with which the volume flow can be controlled or regulated by the functional unit 25 during operation.
  • the control of the proportional valve 28 can take place via the control line 28 'directly as a function of the in the line between the second shuttle valve 24 and the functional unit 25 (see. FIG. 5a ).
  • the proportional valve 28 is electromagnetically controlled by a control unit, not shown (see. FIG. 5b ).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
EP16186249.5A 2016-08-30 2016-08-30 Entrainement hydraulique de dispositif de rotation Withdrawn EP3290386A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16186249.5A EP3290386A1 (fr) 2016-08-30 2016-08-30 Entrainement hydraulique de dispositif de rotation
PCT/EP2017/071695 WO2018041856A1 (fr) 2016-08-30 2017-08-30 Moyen d'entraînement de mécanisme de rotation hydraulique et pompe à béton mobile équipée d'un tel moyen d'entraînement de mécanisme de rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16186249.5A EP3290386A1 (fr) 2016-08-30 2016-08-30 Entrainement hydraulique de dispositif de rotation

Publications (1)

Publication Number Publication Date
EP3290386A1 true EP3290386A1 (fr) 2018-03-07

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EP16186249.5A Withdrawn EP3290386A1 (fr) 2016-08-30 2016-08-30 Entrainement hydraulique de dispositif de rotation

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EP (1) EP3290386A1 (fr)
WO (1) WO2018041856A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062484A1 (fr) * 2007-11-14 2009-05-22 Terex-Demag Gmbh Circuit de commande hydraulique de surrégulation d'un entraînement de mécanisme de rotation
WO2014063490A1 (fr) * 2012-10-26 2014-05-01 中联重科股份有限公司 Système hydraulique permettant de commander à une flèche de se mettre en rotation et procédé de commande associé et équipement de pompage de béton
WO2015165344A1 (fr) * 2014-04-29 2015-11-05 三一汽车制造有限公司 Système hydraulique rotatif et appareil à pompe de transport de béton

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040459B4 (de) * 2005-09-07 2012-12-13 Terex Demag Gmbh Hydrauliksteuerkreis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009062484A1 (fr) * 2007-11-14 2009-05-22 Terex-Demag Gmbh Circuit de commande hydraulique de surrégulation d'un entraînement de mécanisme de rotation
WO2014063490A1 (fr) * 2012-10-26 2014-05-01 中联重科股份有限公司 Système hydraulique permettant de commander à une flèche de se mettre en rotation et procédé de commande associé et équipement de pompage de béton
WO2015165344A1 (fr) * 2014-04-29 2015-11-05 三一汽车制造有限公司 Système hydraulique rotatif et appareil à pompe de transport de béton

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Publication number Publication date
WO2018041856A1 (fr) 2018-03-08

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