EP2551232A1 - Crane control system - Google Patents
Crane control system Download PDFInfo
- Publication number
- EP2551232A1 EP2551232A1 EP20120005495 EP12005495A EP2551232A1 EP 2551232 A1 EP2551232 A1 EP 2551232A1 EP 20120005495 EP20120005495 EP 20120005495 EP 12005495 A EP12005495 A EP 12005495A EP 2551232 A1 EP2551232 A1 EP 2551232A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crane
- sub
- control block
- hydraulic
- hydraulic pressure
- 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.)
- Granted
Links
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/082—Servomotor systems incorporating electrically operated control means with different modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/85986—Pumped fluid control
Definitions
- the present invention relates to a crane control system for the control and / or hydraulic supply of hydraulic consumers of a crane and a crane with at least one crane control system.
- Crane control systems with so-called load-sensing are known in cranes with hydraulically actuated crane actuators. Various crane movements can be driven independently of each other.
- the controller determines the pressure required by each crane actuator and determines the maximum pressure required. The controller then automatically adjusts the hydraulic pump to the pressure determined.
- each crane actuator needs an individual hydraulic pressure and an individual hydraulic quantity.
- the rocker cylinder requires a high hydraulic pressure, a winch often requires a large amount of hydraulic oil.
- a crane control system for controlling and / or hydraulic supply hydraulic consumers of a crane with at least a first pump means and at least one second pump means, at least a first sub-control block and is provided at least a second sub-control block, by means of which in each case at least one hydraulic consumer of the crane can be supplied with hydraulic medium, wherein the first pumping means is connected to the first sub-control block and is operable with a first hydraulic pressure and wherein the second pumping means is connected to the second sub-control block and can be operated with a second hydraulic pressure.
- first hydraulic consumers of a crane which must be supplied with a small or comparatively lower operating pressure with hydraulic medium can be supplied without corresponding reduction of the operating pressure of the hydraulic medium, for example by the first pump means and the first sub-control block.
- second hydraulic consumers which have to be supplied with a high or comparatively higher operating pressure with hydraulic medium, can be supplied directly with a corresponding operating pressure of the hydraulic medium, for example through the second pumping means and the second sub-control block.
- first sub-control block and the second sub-control block at least one valve means is arranged or provided, by means of which the first sub-control block and the second sub-control block are hydraulically connectable and / or separable.
- At least one switch means is provided, by means of which the valve means can be actuated.
- the switch means which may be a switch or a so-called "eco-switch”
- the crane operator can deliberately switch to the energy-saving crane control with mutually separated by the valve means Um Kunststoffblöcken, ie not hydraulically shorted Um Kunststoffblöcken.
- the division into the at least two Um Kunststoffblöcke can thus always then be activated by the crane operator, if the current work situation allows energy to be saved. In this case, the crane operator actively activates the "eco-switch" to activate the energy-saving function.
- the eco-switch is not activated or switched accordingly or deactivated.
- a second valve means is arranged or provided, by means of which the third sub-control block with the first sub-control block and / or the second sub-control block hydraulically connectable and / or separable is.
- At least one further switch means is provided, by means of which the second valve means is actuated and / or by means of the switch means, by means of which the valve means is actuated, and the second valve means is actuated.
- At least one crane control element in particular a crane control is provided, by means of which the at least one first hydraulic pressure and / or the at least one second hydraulic pressure is adjustable, wherein it is further preferably provided that the third hydraulic pressure can be adjusted by means of the crane control element.
- the respective at least one hydraulic consumer of the crane is a crane actuator, wherein in particular the crane actuator is a slewing gear, a rocking cylinder, a winch, a telescopic drive and / or a caterpillar drive.
- Hydraulic consumers ie crane actuators
- the present invention relates to a crane with the features of claim 10. Thereafter, it is provided that a crane with at least one crane control system according to one of claims 1 to 9.
- the crane may be, for example, a mobile crane.
- Fig. 1 shows a schematic side view of a crane with a crane control system according to the invention.
- a crane 1 has a superstructure 3 and an undercarriage 2 with a plurality of crane actuators, such as a slewing gear 4, luffing cylinder 5, winches 6 or a lifting mechanism 6 and a telescopic drive 7.
- various encoders 8 and input and output units 9, here control transmitter with touch displays 9 and a so-called LICCON screen 9 with display and input means, and a crane control 10 are provided. Whether it is the crane 8 is a single or twin-engine crane is irrelevant.
- the crane has an internal combustion engine 12, namely a diesel engine 12.
- This internal combustion engine 12 drives directly or indirectly various pumps 13.
- at least one pump 13 is provided.
- the pumps 13 of the crane actuators for the load-sensing system are in an open hydraulic circuit.
- the bus system 14 for data and energy transfer is by means of a line with hatching in the FIG. 2 shown. Further, a control block 15 is provided, which supplies the Kranaktuatoren with hydraulic medium. Volume flow Q and hydraulic pressure p for each crane actuator is individually set in the control block via the controlled proportional shifters 16. So there is a pressure compensator available.
- FIG. 2 shows a schematic view of a crane control system according to the prior art. I'm in the FIG. 2 the system according to the invention can not be implemented, since only one pump 13 for the load-sensing system are present, as already explained above.
- the pump 13 is a variable displacement pump 13 and may be a gear pump coupled to and driven by the diesel engine 12.
- FIG. 3 now shows schematically the crane control system according to the invention, which can also be referred to as a load-sensing system, namely in particular as a “combined load-sensing pump control”.
- FIG. 4 shows the solution with 3 pumps 13 'and 13 "and 13"' and with three independent load-sensing systems. It is self-explanatory that, after short-circuiting the various previously independent load-sensing systems, the systems are no longer independent but form a common load-sensing system.
- the division into the at least two sub-control blocks 15 'and 15 can then always be run in order to save energy, and it could also be possible for the crane operator to actively actuate an" eco-switch "in order to activate or deactivate the energy-saving function according to the invention It can then be efficient if the crane operator already knows that he often needs the high volume flow Q in the upcoming lifting work, in which case he does not actuate the eco-switch.
- the valve 50 is a valve that operates either fully open or fully closed. Thus arise in the valve 50 no losses. However, since the required hydraulic pressure p is set beforehand, the opening or closing of the valve 50 is not appreciable or otherwise detrimental to the performance of the crane 1.
- the internal combustion engine 12 can not be designed to be switched off, since, for example, the air conditioning compressor has to continue to be operated.
- the fuel savings result solely from the "combined load-sensing pump control".
- the encoders 8 may be different sensors at various locations, e.g. Pressure sensors, angle encoders, etc.
- FIG. 5 shows a solution in which the maximum pressure is measured by the encoders 8 in each of the at least 2 independent load-sensing systems.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Automation & Control Theory (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
- Jib Cranes (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Kransteuerungssystem zur Ansteuerung und/oder zur hydraulischen Versorgung hydraulischer Verbraucher eines Kranes sowie einen Kran mit wenigstens einem Kransteuerungssystem.The present invention relates to a crane control system for the control and / or hydraulic supply of hydraulic consumers of a crane and a crane with at least one crane control system.
Bekannt sind bei Kranen mit hydraulisch betätigbaren Kranaktuatoren Kransteuerungssysteme mit einem sogenannten Load-Sensing. Hierbei können verschiedene Kranbewegungen unabhängig voneinander gefahren werden. Die Steuerung stellt den von jedem Kranaktuator benötigten Druck fest und ermittelt den maximal benötigten Druck. Daraufhin stellt die Steuerung die Hydraulikpumpe automatischen auf den ermittelten Druck ein.Crane control systems with so-called load-sensing are known in cranes with hydraulically actuated crane actuators. Various crane movements can be driven independently of each other. The controller determines the pressure required by each crane actuator and determines the maximum pressure required. The controller then automatically adjusts the hydraulic pump to the pressure determined.
Hierbei handelt es sich um ein sicheres und robustes Verfahren. Über Proportionalschieber werden dann die jeweiligen Kranaktuatoren mit dem Hydraulikmedium versorgt.This is a safe and robust procedure. Proportional slides then supply the respective crane actuators with the hydraulic medium.
Im Load-Sensing-System gemäß dem Stand der Technik (vgl. auch
Nun benötigt jeder Kranaktuator aber einen individuellen Hydraulikdruck und eine individuelle Hydraulikmenge.Now each crane actuator needs an individual hydraulic pressure and an individual hydraulic quantity.
Typischerweise benötigt der Wippzylinder einen hohen Hydraulikdruck, eine Winde benötigt häufig eine große Hydraulikölmenge.Typically, the rocker cylinder requires a high hydraulic pressure, a winch often requires a large amount of hydraulic oil.
Benötigt das Wippwerk 330 bar und 100 l/min und die Winde benötigt z. B. einen Druck von 60 bar und eine Hydraulikölmenge von 200 l/min, dann muss der Hydraulikdruck im für die Winde zuständigen Proportionalschieber reduziert werden. Die Differenz von 300 bar ― 60 bar = 240 bar wird dann im Proportionalschieber abgebaut und in Wärme umgewandelt. Die in Wärme umgewandelte Leistung beträgt in diesem Fall ca. 80 kW. Es kann folgende Formel in der Praxis angewandt werden:
Es ist ersichtlich, dass die "Verluste" umso größer werden, je größer die Druckdifferenz und je größer der Volumenstrom ist.It can be seen that the larger the pressure difference and the larger the volume flow, the greater the "losses" become.
Es ist daher die Aufgabe der vorliegenden Erfindung, ein Kransteuerungssystem der eingangs genannten Art in vorteilhafter Weise weiterzubilden.It is therefore an object of the present invention to develop a crane control system of the type mentioned in an advantageous manner.
Diese Aufgabe wird erfindungsgemäß gelöst durch ein Kransteuerungssystem mit den Merkmalen des Anspruchs 1. Danach ist vorgesehen, dass ein Kransteuerungssystem zur Ansteuerung und/oder zur hydraulischen Versorgung hydraulischer Verbraucher eines Kranes mit wenigstens einem ersten Pumpenmittel und wenigstens einem zweiten Pumpenmittel, wenigstens einem ersten Untersteuerblock und wenigstens einem zweiten Untersteuerblock versehen ist, mittels derer jeweils wenigstens ein hydraulischer Verbraucher des Kranes mit Hydraulikmedium versorgbar ist, wobei das erste Pumpenmittel mit dem ersten Untersteuerblock verbunden ist und mit einem ersten Hydraulikdruck betreibbar ist und wobei das zweite Pumpenmittel mit dem zweiten Untersteuerblock verbunden ist und mit einem zweiten Hydraulikdruck betreibbar ist.This object is achieved by a crane control system with the features of claim 1. Thereafter, it is provided that a crane control system for controlling and / or hydraulic supply hydraulic consumers of a crane with at least a first pump means and at least one second pump means, at least a first sub-control block and is provided at least a second sub-control block, by means of which in each case at least one hydraulic consumer of the crane can be supplied with hydraulic medium, wherein the first pumping means is connected to the first sub-control block and is operable with a first hydraulic pressure and wherein the second pumping means is connected to the second sub-control block and can be operated with a second hydraulic pressure.
Dadurch ergibt sich insbesondere der Vorteil, dass erste hydraulische Verbraucher eines Kranes, die mit einem geringen bzw. vergleichsweise geringeren Betriebsdruck mit Hydraulikmedium versorgt werden müssen, ohne entsprechende Reduzierung des Betriebsdruckes des Hydraulikmediums versorgt werden können, beispielsweise durch das erste Pumpenmittel und den ersten Untersteuerblock. Ferner können vorteilhafterweise zweite hydraulische Verbraucher, die mit einem hohen bzw. vergleichsweise höheren Betriebsdruck mit Hydraulikmedium versorgt werden müssen, direkt mit entsprechendem Betriebsdruck des Hydraulikmediums versorgt werden, beispielsweise durch das zweite Pumpenmittel und den zweiten Untersteuerblock.This results in particular the advantage that first hydraulic consumers of a crane, which must be supplied with a small or comparatively lower operating pressure with hydraulic medium can be supplied without corresponding reduction of the operating pressure of the hydraulic medium, for example by the first pump means and the first sub-control block. Furthermore, advantageously second hydraulic consumers, which have to be supplied with a high or comparatively higher operating pressure with hydraulic medium, can be supplied directly with a corresponding operating pressure of the hydraulic medium, for example through the second pumping means and the second sub-control block.
Es kann vorgesehen sein, dass zwischen dem ersten Untersteuerblock und dem zweiten Untersteuerblock wenigstens ein Ventilmittel angeordnet bzw. vorgesehen ist, mittels dessen der erste Untersteuerblock und der zweite Untersteuerblock hydraulisch verbindbar und/oder trennbar sind. Durch das Öffnen kann vorteilhafterweise ein hydraulischer Kurzschluss herbeigeführt werden, so dass beispielsweise bei Bedarf insbesondere schnellere Kranbewegungen möglich sind. In diesem Fall werden die eingangs genannten Verlustleistungen in Folge der notwendigen Druckreduktion bewusst in Kauf genommen.It can be provided that between the first sub-control block and the second sub-control block at least one valve means is arranged or provided, by means of which the first sub-control block and the second sub-control block are hydraulically connectable and / or separable. By opening advantageously a hydraulic short circuit can be brought about, so that, for example, faster crane movements are possible, for example when needed. In this case, the loss of power mentioned in the introduction as a result of the necessary pressure reduction are deliberately accepted.
Weiter ist denkbar, dass wenigstens ein Schaltermittel vorgesehen ist, mittels dessen das Ventilmittel betätigbar ist. Mittels des Schaltermittels, das ein Schalter bzw. ein sogenannter "Öko-Schalter" sein kann, kann der Kranführer bewusst auf die energiesparende Kransteuerung mit voneinander durch das Ventilmittel getrennten Umsteuerblöcken, d. h. nicht hydraulisch kurzgeschlossenen Umsteuerblöcken umschalten. Die Aufteilung in die mindestens zwei Umsteuerblöcke kann somit immer dann durch den Kranführer aktiviert werden, wenn es die aktuelle Arbeitssituation ermöglich, dass Energie eingespart werden kann. Der Kranführer betätigt in diesem Fall aktiv den "Ökoschalter", um die Energiesparfunktion zu aktivieren. Falls der Kranfahrer bereits weiß, dass er bei der anstehenden Hubarbeit mit dem Kran häufig hohe Volumenströme des Hydraulikmediums aufgrund entsprechend notwendiger Betätigung von hydraulischen Verbrauchern des Kranes mit hohem Betriebsdruck des Hydraulikmediums benötigt, wird der Ökoschalter nicht aktiviert bzw. entsprechend umgeschaltet bzw. deaktiviert.It is also conceivable that at least one switch means is provided, by means of which the valve means can be actuated. By means of the switch means, which may be a switch or a so-called "eco-switch", the crane operator can deliberately switch to the energy-saving crane control with mutually separated by the valve means Umsteuerblöcken, ie not hydraulically shorted Umsteuerblöcken. The division into the at least two Umsteuerblöcke can thus always then be activated by the crane operator, if the current work situation allows energy to be saved. In this case, the crane operator actively activates the "eco-switch" to activate the energy-saving function. If the crane operator already knows that he often requires high volume flows of the hydraulic medium due to the necessary operation of hydraulic consumers of the crane with high operating pressure of the hydraulic medium in the upcoming lifting work with the crane, the eco-switch is not activated or switched accordingly or deactivated.
Darüber hinaus kann vorgesehen sein, dass weiter wenigstens ein drittes Pumpenmittel und wenigstens ein dritter Untersteuerblock vorgesehen ist, mittels dessen wenigstens ein hydraulischer Verbraucher des Kranes mit Hydraulikmedium versorgbar ist, wobei das dritte Pumpenmittel mit dem dritten Untersteuerblock verbunden ist und mit einem dritten Hydraulikdruck betreibbar ist.In addition, it can be provided that further at least a third pump means and at least a third sub-control block is provided, by means of which at least one hydraulic consumer of the crane can be supplied with hydraulic medium, wherein the third pump means is connected to the third sub-control block and can be operated with a third hydraulic pressure ,
Außerdem ist möglich, dass zwischen dem dritten Untersteuerblock und dem ersten Untersteuerblock und/oder dem zweiten Untersteuerblock wenigstens ein zweites Ventilmittel angeordnet bzw. vorgesehen ist, mittels dessen der dritte Untersteuerblock mit dem ersten Untersteuerblock und/oder dem zweiten Untersteuerblock hydraulisch verbindbar und/oder trennbar ist.It is also possible that between the third sub-control block and the first sub-control block and / or the second sub-control block at least a second valve means is arranged or provided, by means of which the third sub-control block with the first sub-control block and / or the second sub-control block hydraulically connectable and / or separable is.
Ferner ist denkbar, dass wenigstens ein weiteres Schaltermittel vorgesehen ist, mittels dessen das zweite Ventilmittel betätigbar ist und/oder das mittels des Schaltermittels, mittels dessen das Ventilmittel betätigbar ist, auch das zweite Ventilmittel betätigbar ist.It is also conceivable that at least one further switch means is provided, by means of which the second valve means is actuated and / or by means of the switch means, by means of which the valve means is actuated, and the second valve means is actuated.
Es kann vorgesehen sein, dass wenigstens ein Kransteuerungselement, insbesondere eine Kransteuerung vorgesehen ist, mittels derer der wenigstens eine erste Hydraulikdruck und/oder der wenigstens eine zweite Hydraulikdruck einstellbar ist, wobei weiter vorzugsweise vorgesehen ist, dass mittels des Kransteuerungselementes der dritte Hydraulikdruck einstellbar ist.It can be provided that at least one crane control element, in particular a crane control is provided, by means of which the at least one first hydraulic pressure and / or the at least one second hydraulic pressure is adjustable, wherein it is further preferably provided that the third hydraulic pressure can be adjusted by means of the crane control element.
Darüber hinaus ist möglich, dass mittels des Kransteuerungselementes der erste oder der zweite Hydraulikdruck angleichbar sind, wobei vorzugsweise der jeweils niedrigere Hydraulikdruck an den höheren Hydraulikdruck angeglichen und damit erhöht wird.Moreover, it is possible that by means of the crane control element of the first or the second hydraulic pressure can be equalized, wherein preferably the respective lower hydraulic pressure is equalized to the higher hydraulic pressure and thus increased.
Außerdem kann vorgesehen sein, dass der jeweils wenigstens eine hydraulische Verbraucher des Kranes ein Kranaktuator ist, wobei insbesondere der Kranaktuator ein Drehwerk, ein Wippzylinder, eine Winde, ein Teleskopierantrieb und/oder ein Raupenantrieb ist.In addition, it can be provided that the respective at least one hydraulic consumer of the crane is a crane actuator, wherein in particular the crane actuator is a slewing gear, a rocking cylinder, a winch, a telescopic drive and / or a caterpillar drive.
Hydraulische Verbraucher, also Kranaktuatoren können insbesondere Wippzylinder, Teleskopzylinder, Raupenantriebe, Hilfsverbraucher (z. B. Wippen oder Teleskopieren des Kabinenarms, Ballastierzylinder) und/oder Winden für Hubwerk oder Wippwerk sein.Hydraulic consumers, ie crane actuators, can be in particular luffing cylinders, telescopic cylinders, caterpillar drives, auxiliary consumers (eg rockers or telescoping of the cabin arm, ballast cylinders) and / or winches for hoisting gear or luffing gear.
Des Weiteren betrifft die vorliegende Erfindung einen Kran mit den Merkmalen des Anspruchs 10. Danach ist vorgesehen, dass ein Kran mit wenigstens einem Kransteuerungssystem nach einem der Ansprüche 1 bis 9. Der Kran kann beispielsweise ein Mobilkran sein.Furthermore, the present invention relates to a crane with the features of
Weitere Einzelheiten und Vorteile der Erfindung sollen nun anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher dargestellt werden.Further details and advantages of the invention will now be described with reference to an embodiment shown in the drawing.
Es zeigen
- Fig. 1:
- eine schematische Darstellung eines Mobilkrans in der Seitenansicht;
- Fig. 2:
- eine schematische Ansicht eines Kransteuerungssystems gemäß dem Stand der Technik;
- Fig. 3:
- eine schematische Darstellung des erfindungsgemäßen Kransteuerungssystems;
- Fig. 4:
- eine weitere schematische Darstellung des erfindungsgemäßen Kransteuerungssystems; und
- Fig. 5:
- eine weitere schematische Darstellung des erfindungsgemäßen Kransteuerungssystems.
- Fig. 1:
- a schematic representation of a mobile crane in the side view;
- Fig. 2:
- a schematic view of a crane control system according to the prior art;
- 3:
- a schematic representation of the crane control system according to the invention;
- 4:
- a further schematic representation of the crane control system according to the invention; and
- Fig. 5:
- a further schematic representation of the crane control system according to the invention.
Weiter sind diverse Geber 8 und Ein- und Ausgabeeinheiten 9, hier Steuergeber mit Touch-Displays 9 und ein sogenannter LICCON-Bildschirm 9 mit Anzeige- und Eingabemitteln, sowie eine Kransteuerung 10 vorgesehen. Ob es sich bei dem Kran 8 um einen Ein- oder Zweimotorenkran handelt ist unerheblich.Furthermore,
Handelt es sich beispielsweise um einen Einmotorenkran, dann wird die Energie vom Unterwagen 2 durch die Drehdurchführung 11 zum Oberwagen 3 geführt. Bei einem Zweimotorenkran entfällt die Drehdurchführung 11.For example, if it is a single-engine crane, then the energy from the
Weiter weist der Kran einen Verbrennungsmotor 12, nämlich einen Dieselmotor 12 auf. Dieser Verbrennungsmotor 12 treibt direkt oder indirekt verschiedene Pumpen 13 an. Grundsätzlich ist mindestens eine Pumpe 13 vorgesehen. Die Pumpen 13 von den Kranaktuatoren für das Load-Sensing-System befinden sich in einem offenen Hydraulikkreis.Furthermore, the crane has an
Das Bussystem 14 zur Daten- und Energieübertragung ist mittels einer Linie mit Schraffur in der
Liegt nun aber ein Kran 1 vor, der aufgrund seiner Leistungsfähigkeit zwei oder mehr Pumpen 13 für das Load-Sensing-System aufweist, dann wird gemäß Stand der Technik auch das System aus der
Es sind mindestens 2 Pumpen 13' und 13" zusätzlich zu der Pumpe 13 für das Drehwerk 4 für die Versorgung der Kranaktuatoren vorgesehen. Auch ist die vorher beschriebene Druckwaage vorhanden. In den Steuerblock ist nun aber mindestens ein Ventil 50 eingebaut, das den gesamten Steuerblock 15 in mindestens zwei Untersteuerblöcke 15' und 15" aufteilen kann.There are at least 2 pumps 13 'and 13 "in addition to the
Im Fall gemäß
So werden im Prinzip mindestens 2 unabhängige Load-Sensing-Systeme geschaffen. Werden nun die Kranaktuatoren so den beiden Load-Sensing-Systemen zugeordnet, dass Kranaktuatoren, die typischerweise einen hohen Hydraulikdruck p benötigen und andererseits Kranaktuatoren, die typischerweise einen hohen Volumenstrom Q benötigen, zusammengeschaltet werden, dann kann eine relevante Verringerung der in Wärme umzuwandelnden Leistung erreicht werden (siehe auch vorstehende Formel).In principle, at least 2 independent load-sensing systems are created. If the crane actuators are now assigned to the two load-sensing systems such that crane actuators, which typically require a high hydraulic pressure p and, on the other hand, crane actuators, which typically require a high volume flow Q, are interconnected, then a relevant reduction in the power to be converted into heat can be achieved (see also the above formula).
Die Aufteilung in die mindestens zwei Untersteuerblöcke 15' und 15" kann dann stets gefahren werden, um Energie einzusparen. Auch könnte möglich sein, dass der Kranbediener aktiv einen "Ökoschalter" betätigen muss, um die erfindungsgemäße Energiesparfunktion zu aktivieren bzw. zu deaktivieren. Dies kann dann effizient sein, wenn der Kranfahrer schon weiß, dass er bei der anstehenden Hubarbeit häufig den hohen Volumenstrom Q benötigt. In diesem Fall betätigt er den Ökoschalter nicht.The division into the at least two
Auch könnten verschiedene Pumpen eingesetzt werden, deren Charakteristik auf die speziellen Anforderungen der zugeordneten Kranaktuatoren angepasst ist. Stellt die Kransteuerung 10 allerdings fest, dass ein Verbraucher einen höheren Volumenstrom Q anfordert, als die zugeordnete Pumpe 13' oder 13" in der Lage ist bereitzustellen, dann veranlasst die Kransteuerung 10 zuerst die Pumpe, die den niedrigeren Hydraulikdruck p gerade aufweist, ihren Hydraulikdruck p der anderen Pumpe 13' oder 13" anzupassen und öffnet anschließend das Ventil 50. So können beide Pumpen 13' und 13" gemeinsam den angeforderten Volumenstrom Q bereitstellen. Dieses wird zwar mit einer höheren "Verlustleistung" erkauft, aber sorgt für schnellere Kranbewegungen und somit wieder für die Einsparung auf anderem Gebiet. Verwendung finden hierbei selbstverständlich wieder die Geber 8.Also, different pumps could be used, whose characteristics are adapted to the specific requirements of the associated Kranaktuatoren. However, if the
Das Ventil 50 ist ein Ventil, das entweder ganz geöffnet oder ganz geschlossen betrieben wird. So entstehen in dem Ventil 50 keine Verluste. Da der benötigte Hydraulikdruck p aber vorher eingestellt wird, ist das Öffnen oder Schließen des Ventils 50 nicht merklich oder in anderer Weise für die Leistung des Krans 1 abträglich.The
Da das Drehen des Oberwagens 3 sowieso von einer getrennten Pumpe 13 angefahren wird, können so gleichzeitig und ohne Verluste 3 Bewegungen ausgeführt werden. Erfahrungsgemäß sind die am häufigsten ausgeführten Bewegungen der Kranaktuatoren das Drehen, Heben und Ablassen der Last und das Wippen.Since the turning of the
Weiter ist zu erwähnen, dass bei dieser Lösung der Verbrennungsmotor 12 nicht abschaltbar gestaltet werden kann, da zum Beispiel der Klimakompressor weiter betrieben werden muss. Die Kraftstoffeinsparung resultiert alleine aus der "kombinierten Load-Sensing Pumpensteuerung".It should also be mentioned that in this solution, the
Die Geber 8 können verschiedene Sensoren an verschiedensten Stellen sein, z.B. Drucksensoren, Winkelgeber, usw.The
Claims (10)
Applications Claiming Priority (1)
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DE201110108851 DE102011108851A1 (en) | 2011-07-28 | 2011-07-28 | Crane Control System |
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EP2551232A1 true EP2551232A1 (en) | 2013-01-30 |
EP2551232B1 EP2551232B1 (en) | 2013-11-20 |
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EP20120005495 Not-in-force EP2551232B1 (en) | 2011-07-28 | 2012-07-27 | Crane control system |
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US (1) | US9096414B2 (en) |
EP (1) | EP2551232B1 (en) |
CN (1) | CN102897668B (en) |
DE (1) | DE102011108851A1 (en) |
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WO2015189761A1 (en) * | 2014-06-09 | 2015-12-17 | Sabic Global Technologies B.V. | Thermal conductive compositions having good impact performance |
DE102014009996A1 (en) * | 2014-07-05 | 2016-01-07 | Hydac Fluidtechnik Gmbh | Valve modular system |
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- 2011-07-28 DE DE201110108851 patent/DE102011108851A1/en not_active Withdrawn
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2012
- 2012-07-26 US US13/559,012 patent/US9096414B2/en not_active Expired - Fee Related
- 2012-07-27 EP EP20120005495 patent/EP2551232B1/en not_active Not-in-force
- 2012-07-30 CN CN201210269623.XA patent/CN102897668B/en not_active Expired - Fee Related
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DE3901207A1 (en) * | 1989-01-17 | 1990-07-19 | Rexroth Mannesmann Gmbh | Valve arrangement for several hydraulic drives, in particular for the drives of a crane |
EP0481120A1 (en) * | 1989-04-21 | 1992-04-22 | KABUSHIKI KAISHA KOBE SEIKO SHO also known as Kobe Steel Ltd. | Apparatus for suppressing quaky movements of mobile cranes |
EP0422821A1 (en) * | 1989-10-10 | 1991-04-17 | The Manitowoc Company, Inc. | Control and hydraulic system for liftcrane |
EP1176115A1 (en) * | 2000-07-28 | 2002-01-30 | Kobelco Construction Machinery Co., Ltd. | Hydraulic circuit for a crane |
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DE112009001293T5 (en) * | 2008-05-30 | 2011-04-14 | Kayaba Industry Co., Ltd. | Controller for a hybrid construction machine |
EP2151526A1 (en) * | 2008-08-08 | 2010-02-10 | Volvo Construction Equipment Holding Sweden AB | Hydraulic flow sharing system for excavating and pipe laying work |
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Also Published As
Publication number | Publication date |
---|---|
CN102897668B (en) | 2016-06-01 |
CN102897668A (en) | 2013-01-30 |
DE102011108851A1 (en) | 2013-01-31 |
EP2551232B1 (en) | 2013-11-20 |
US9096414B2 (en) | 2015-08-04 |
US20130026123A1 (en) | 2013-01-31 |
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