EP1666402B1 - Cable drum with hydraulic drive arrangement - Google Patents

Cable drum with hydraulic drive arrangement Download PDF

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Publication number
EP1666402B1
EP1666402B1 EP05022313A EP05022313A EP1666402B1 EP 1666402 B1 EP1666402 B1 EP 1666402B1 EP 05022313 A EP05022313 A EP 05022313A EP 05022313 A EP05022313 A EP 05022313A EP 1666402 B1 EP1666402 B1 EP 1666402B1
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EP
European Patent Office
Prior art keywords
cable reel
hydraulic
valve
accordance
drive motor
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.)
Not-in-force
Application number
EP05022313A
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German (de)
French (fr)
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EP1666402A1 (en
Inventor
Hubert Herberger
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.)
Hartmann & Konig Stromzufuehrungs AG
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Hartmann & Konig Stromzufuehrungs AG
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Publication of EP1666402A1 publication Critical patent/EP1666402A1/en
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Publication of EP1666402B1 publication Critical patent/EP1666402B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • B65H75/4481—Arrangements or adaptations for driving the reel or the material
    • B65H75/4489—Fluid motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
    • B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
    • B65H75/34—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables
    • B65H75/38—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks specially adapted or mounted for storing and repeatedly paying-out and re-storing lengths of material provided for particular purposes, e.g. anchored hoses, power cables involving the use of a core or former internal to, and supporting, a stored package of material
    • B65H75/44—Constructional details
    • B65H75/4481—Arrangements or adaptations for driving the reel or the material
    • B65H75/4484—Electronic arrangements or adaptations for controlling the winding or unwinding process, e.g. with sensors
    • 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
    • B66C13/12—Arrangements of means for transmitting pneumatic, hydraulic, or electric power to movable parts of devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/48—Control devices automatic
    • B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control

Definitions

  • the invention relates to a cable drum of a mobile consumer, in particular a crane, according to the preamble of claim 1.
  • the electrical / hydraulic drive power is supplied to the consumer usually from a permanent connection via a supply line.
  • a supply line To compensate for the length of the supply line in the process of the consumer this is known to be driven by a motor line drum used on the supply line is up or unwound.
  • the winding diameter of the supply line on the line drum changes depending on the position of the consumer, which in turn leads to a change in the tensile stress, with which the supply line is wound onto the line drum.
  • the aforementioned two documents give the expert no indication to drive the cable drum by a hydraulic motor, and in this case to regulate the torque provided by the hydraulic motor as a function of the rotational angular position of the cable drum.
  • a cable drum according to the preamble of claim 1 is known from CA 2 305 482 A1 known.
  • a hydraulic drive arrangement for driving a line drum of a mobile consumer, in particular a crane comprises a hydraulic drive motor, which is drivingly coupled to the line drum.
  • the drive motor is supplied with hydraulic fluid via a hydraulic pump, preferably a hydraulic control pump.
  • the drive assembly further comprises an adjusting device for varying the pressure of the hydraulic fluid supplied to the drive motor from the hydraulic pump, which has an electrically controllable proportional valve, which by an electronic control and regulating device in response to the signals of a coupled with the line drum rotary encoder, which determines the instantaneous angular position of the line drum, is controlled in such a way that the drive motor acts on the line drum in unwound cable drum with a low torque and wound coil cable drum with a high torque.
  • an adjusting device for varying the pressure of the hydraulic fluid supplied to the drive motor from the hydraulic pump which has an electrically controllable proportional valve, which by an electronic control and regulating device in response to the signals of a coupled with the line drum rotary encoder, which determines the instantaneous angular position of the line drum, is controlled in such a way that the drive motor acts on the line drum in unwound cable drum with a low torque and wound coil cable drum with a high torque.
  • the proportional valve in this case provides in dependence on the signals of the control device for an adjustment of the pressure, and thus of the force exerted by the hydraulic drive motor torque, it being due to the below described in more detail control of the volume of the drive motor supplied amount of hydraulic fluid only to a reflux of very small amounts of hydraulic oil via a connected to the proportional valve return line comes because, for example, when the hydraulic drive a pressure drop of only a few drops in the line already a significant reduction in line pressure - and thus the torque - causes.
  • the hydraulic pump is a variable displacement driven via a substantially constant speed electric drive motor, preferably an axial piston pump, wherein the delivery volume is variable by changing the inclination angle of a contained in the pump rotating disc, the one or more pump piston operated to promote the hydraulic fluid.
  • a substantially constant speed electric drive motor preferably an axial piston pump
  • the delivery volume is variable by changing the inclination angle of a contained in the pump rotating disc, the one or more pump piston operated to promote the hydraulic fluid.
  • the running at a constant speed electric drive motor is in this case preferably a known three-phase electric motor, which rotates in a known manner at a speed of 50 Hz.
  • the inventive combination of such a three-phase electric motor with a driven by this control pump has the advantage that compared to known devices only a fraction of the engine power is used to heat the hydraulic fluid, especially when the cable drum is at rest, and the drive motor only must apply a holding torque for tensioning the supply line.
  • the main electric motor also drives preferably via the same drive shaft to another pump, which is a fixed displacement pump - ie a pump with constant displacement - which in accordance with the invention the hydraulic pressure to release a braking device for braking and fixing the cable drum, preferably one Hydraulic multi-disc brake with a maximum limited holding torque, releases when the pump provides the pressure.
  • a fixed displacement pump - ie a pump with constant displacement - which in accordance with the invention the hydraulic pressure to release a braking device for braking and fixing the cable drum, preferably one Hydraulic multi-disc brake with a maximum limited holding torque, releases when the pump provides the pressure.
  • the use of a hydraulically operated brake has the advantage that in the event of failure of the electrical control device or in the case of bursting of a hydraulic hose, the power supply drum can not be put into rapid rotation by the down sliding supply line, and then after the emptying of the drum due to sometimes considerable rotational energy of the line drum shears the supply line at the end of the feed drum.
  • the electronic control device is preferably a programmable logic controller comprising a memory in which the rotation angle of the line drum - which is determined via a coupled to the line drum rotary digital encoder or a potentiometer or the like - together with an associated default value for the pressure or for a the pressure corresponding voltage is stored in a map, which is supplied to the proportional valve as a control signal.
  • the pressure in the supply line to the drive motor determined by the voltage of the actuating signal essentially changes along a straight line as a function of the angle of rotation, wherein advantageously at small angles of rotation (almost unwound line drum) an overstated linear increase occurs higher torque is provided.
  • the life of the supply lines used can be considerably increased, which is in power supply lines, for example in the range of 100,000 winding and unwinding cycles.
  • a hydraulic drive arrangement 1 for driving a line drum 2 of a mobile consumer (not shown in detail), in particular a crane, comprises a hydraulic drive motor 4 which drives the line drum 2 via a shaft 6.
  • the cable drum 2 here is preferably a monospiral cable drum, that is to say a cable drum, on which the supply line 10 connected to a permanent connection 8 is wound up only in one plane.
  • the drive motor 4 is driven via a supply line 12 by a hydraulic pump 14, which is configured in an advantageous manner as a hydraulic control pump, which of a with in Essentially constant speed running electric motor 16 is driven, and whose flow rate of hydraulic fluid is controlled in response to the pressure in the supply line 12 to the drive motor 4, such that at a drop in pressure in the supply line 12, for example when starting the engine 4, the subsidized Amount of hydraulic fluid is increased, and vice versa.
  • a hydraulic pump 14 which is configured in an advantageous manner as a hydraulic control pump, which of a with in Essentially constant speed running electric motor 16 is driven, and whose flow rate of hydraulic fluid is controlled in response to the pressure in the supply line 12 to the drive motor 4, such that at a drop in pressure in the supply line 12, for example when starting the engine 4, the subsidized Amount of hydraulic fluid is increased, and vice versa.
  • the hydraulic fluid provided by the hydraulic pump 14 is first preferably fed to a pressure relief valve 18 whose maximum pressure value is e.g. 160 bar preferably can be set manually, and which, when the maximum pressure value is exceeded, introduces the hydraulic fluid directly into the reservoir 20 in order not to damage the engine 4, for example in the event of a malfunctioning blocking.
  • a pressure relief valve 18 whose maximum pressure value is e.g. 160 bar preferably can be set manually, and which, when the maximum pressure value is exceeded, introduces the hydraulic fluid directly into the reservoir 20 in order not to damage the engine 4, for example in the event of a malfunctioning blocking.
  • a first control valve 22 is arranged, which is connected via an unspecified electrical connection line with an electronic control and regulating device 24, which opens the first control valve - preferably a simple on / off valve - when the electronic Control and regulating device 24, for example, receives from the drive control of the main drive motor of the movable consumer, the signal that the consumer is set in motion.
  • a pressure sensor 26 may be arranged in the supply line 12, which is also connected via an unspecified electrical line to the electronic control and regulation device 24, and monitored by the electronic control and regulating device, whether the Pressure in the supply line 12 exceeds a preferably predetermined minimum value. If this minimum preset value is undershot, this is detected by the electronic control and regulation device 24 as a fault in the supply line 12, which indicates that a failure-induced loss of hydraulic oil, for example due to a burst hose, occurs. In this case, preferably all valves are closed by the electronic control and regulating device, and the electric motor 16 is turned off.
  • a first and a second hydraulically releasable valve 28 and 30 are arranged in the supply line 12, between which a controlled by the electronic control and regulating device 24 proportional valve 32 which the pressure in the supply line 12 as a function of the signals of the electronic control and regulating device changed.
  • the supply line 12 is preferably connected directly to the drive motor 4, wherein to prevent pressure surges due to overshoot of the drive motor 4, the supply line 12 and the first control valve 22, and to the reservoir 20 returning return line 34 preferably over a known shock valve 36 are connected.
  • the two hydraulically releasable valves 28 and 30 and the proportional valve 32 can be bridged by a hydraulic bypass line 38, in which preferably a manually operable control valve 40 is arranged, with the failure of the electronic control and regulating device emergency operation the hydraulic drive assembly 1 according to the invention is possible, for example, to be able to manually move the mobile consumer.
  • the torque exerted by the drive motor 4 on the line drum 2, preferably via the pressure relief valve 18 is set to an average value.
  • the inventive arrangement 1 comprises a further hydraulic pump 42 which is preferably driven by the same motor 16 as the hydraulic pump 14, but in contrast to the pump 14 is a fixed displacement pump, that is a pump with a constant displacement, the one opposite to the pump 14 provides lower pressure and also a lower flow rate of hydraulic fluid.
  • the further pump 42 is connected via a further supply line 44 and a second control valve 46 - preferably a controlled by the electronic control and regulating device 24 simple on / off valve with a hydraulically deactivatable brake device 48, which is preferably a known multi-disc brake, the Case of a pressureless further supply line 44 is operated to prevent unrestricted rotation of the cable drum 2 by the weight of the supply line 10 in case of failure of the electric power supply or a pressure loss.
  • the braking device 48 generates in the actuated state, a braking torque or torque, which reliably prevents idling of the cable drum 2, which, however, is below the torque value, which leads at fully unwound cable drum to a tensile force in the supply line 10, the maximum allowable value for the exceeds the respective line.
  • the other supply line 44 is also fluidly connected to a third control valve 50 which is also driven in accordance with the invention by the electronic control and regulating device 24, and the supply line 52 to the first and second hydraulically releasable valve 28, 30 with pressure from the another hydraulic pump 42 acted upon.
  • a third control valve 50 which is also driven in accordance with the invention by the electronic control and regulating device 24, and the supply line 52 to the first and second hydraulically releasable valve 28, 30 with pressure from the another hydraulic pump 42 acted upon.
  • the line drum 2 is coupled to a rotary encoder 60 which supplies the electronic control and regulation device 24 with a rotational angle signal corresponding to the respective angle of rotation of the line drum 2.
  • the electronic control and regulation device 24 is preferably a programmable logic controller which contains a memory 62 in which the values associated with the respective rotation angles a of the line drum 2 for the torque T and / or the control signal which is supplied to the proportional valve 32 are stored , If in the context of the invention of a force exerted on the line drum 2 torque T is spoken, this means that the line drum 2 is always acted upon by the drive motor 4 in the winding direction of the cable drum 2 with a torque whose value is also when unwinding the cable drum. 2 is also provided by the here in the opposite direction rotating drive motor 4.
  • the electronic control and regulating device 24 may for this purpose comprise a microprocessor, not shown, which determines the electrical control signals for the proportional valve 32 from the electrical signals of the rotary encoder 60.
  • values for the rotation angle a i and the associated torque T i be stored as value pairs, which are preferably determined empirically and stored by the electronic control and regulating device in the memory 62.
  • the value pairs a i , T i for the torque and the angle of rotation are preferably substantially on a straight line 70, wherein the minimum value for the rotation angle a min is preferably determined by a calibration of the rotary encoder 60, and the completely unwound Cable drum corresponds.
  • the direction of rotation of the cable drum 2 by the electronic control and regulating device 24 are taken into account, such that the increase in torque values according to the curve 72 is taken into account only during winding, while the unwinding the arranged on the straight line 70 values are used to control the proportional valve 32.
  • the increase in the torque T as a function of the rotation angle ⁇ is additionally changed as a function of the respective rotational speed of the line drum 2, in particular the increase in the torque T at low angles of rotation.
  • the memory 62 may be configured as a known characteristic map, in which value pairs for the rotation angle a i , the torque T i and the associated speed of the line drum 2 are stored, which are used to drive the proportional valve 32.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Paper (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Actuator (AREA)
  • Servomotors (AREA)

Abstract

The hydraulic drive arrangement has servo unit which has electrically controlled proportion valve (32). The rotation angle position of cable reel (2) is recorded by rotary input type encoder (60). The electronic control and regulation device steers proportion valve. The drive motor (4) strikes with minimum torque in case of unwound cable reel and strikes with high torque in case of wound cable reel.

Description

Die Erfindung betrifft eine Leitungstrommel eines fahrbaren Verbrauchers, insbesondere eines Krans, gemäß dem Oberbegriff von Anspruch 1.The invention relates to a cable drum of a mobile consumer, in particular a crane, according to the preamble of claim 1.

Bei elektrisch oder hydraulisch angetriebenen fahrbaren Verbrauchern wie Kränen, insbesondere Spreader-Kränen, oder auch Baumstamm-Zerlegeeinrichtungen in der Forstwirtschaft etc. wird die elektrische/hydraulische Antriebsenergie dem Verbraucher in der Regel von einem Festanschluss aus über eine Versorgungsleitung zugeführt. Zum Längenausgleich der Versorgungsleitung beim Verfahren des Verbrauchers wird hierbei bekanntermaßen eine durch einen Motor angetriebene Leitungstrommel eingesetzt, auf die die Versorgungsleitung auf- bzw. abgewickelt wird. Dabei besteht bekanntermaßen das Problem, dass sich der Wickeldurchmesser der Versorgungsleitung auf der Leitungstrommel in Abhängigkeit von der Position des Verbrauchers ändert, was wiederum zu einer Änderung der Zugspannung führt, mit der die Versorgungsleitung auf die Leitungstrommel aufgewickelt wird.When driven electrically or hydraulically mobile consumers such as cranes, especially spreader cranes, or tree trunk decomposition facilities in forestry, etc., the electrical / hydraulic drive power is supplied to the consumer usually from a permanent connection via a supply line. To compensate for the length of the supply line in the process of the consumer this is known to be driven by a motor line drum used on the supply line is up or unwound. As is known, there is the problem that the winding diameter of the supply line on the line drum changes depending on the position of the consumer, which in turn leads to a change in the tensile stress, with which the supply line is wound onto the line drum.

In diesem Zusammenhang ist es aus der DE 39 21 679 C2 bekannt, die Leitungstrommel durch einen elektrischen Asynchronmotor und einen Frequenzumformer anzutreiben, der das Drehmoment des Motors in Abhängigkeit von einem Drehwinkelgeber steuert, welcher die momentane Rotorposition des Elektromotors erfasst.In this context, it is from the DE 39 21 679 C2 It is known to drive the cable drum by an asynchronous electric motor and a frequency converter which controls the torque of the motor in response to a rotary encoder which detects the instantaneous rotor position of the electric motor.

Weiterhin ist es aus der DE 33 10 311 C2 bekannt, die Leitungstrommel über einen Elektromotor anzutreiben, der über einen Frequenzumformer angesteuert wird, der die Drehzahl des Elektromotors in Abhängigkeit von einem Fühler, der den Wickeldurchmesser bestimmt, sowie einem Fühler, der die Verfahrgeschwindigkeit des Verbrauchers bestimmt, zu regeln.Furthermore, it is from the DE 33 10 311 C2 known to drive the cable drum via an electric motor which is driven by a frequency converter, the speed of the electric motor in response to a sensor that determines the winding diameter, and a sensor that determines the travel speed of the consumer to control.

Die zuvor genannten beiden Schriften geben dem Fachmann keinen Hinweis darauf, die Leitungstrommel durch einen Hydraulikmotor anzutreiben, und hierbei das vom Hydraulikmotor bereitgestellte Drehmoment in Abhängigkeit von der Drehwinkelposition der Leitungstrommel zu regeln.The aforementioned two documents give the expert no indication to drive the cable drum by a hydraulic motor, and in this case to regulate the torque provided by the hydraulic motor as a function of the rotational angular position of the cable drum.

Eine Leitungstrommel gemäß dem Oberbegriff des Anspruchs 1 ist aus der CA 2 305 482 A1 bekannt.A cable drum according to the preamble of claim 1 is known from CA 2 305 482 A1 known.

Demgemäß ist es eine Aufgabe der vorliegenden Erfindung, eine alternative Anordnung zum Antrieb einer Leitungstrommel eines verfahrbaren Verbrauchers zu schaffen.Accordingly, it is an object of the present invention to provide an alternative arrangement for driving a cable drum of a traveling consumer.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale von Anspruch 1 gelöst.This object is achieved by the features of claim 1.

Weitere Merkmale der Erfindung sind in den Unteransprüchen enthalten.Further features of the invention are contained in the subclaims.

Gemäß der Erfindung umfasst eine hydraulische Antriebsanordnung zum Antrieb einer Leitungstrommel eines fahrbaren Verbrauchers, insbesondere eines Krans, einen hydraulischen Antriebsmotor, welcher antriebsmäßig mit der Leitungstrommel gekoppelt ist. Der Antriebsmotor wird über eine Hydraulikpumpe, vorzugsweise eine hydraulische Regelpumpe, mit Hydraulikflüssigkeit versorgt.According to the invention, a hydraulic drive arrangement for driving a line drum of a mobile consumer, in particular a crane, comprises a hydraulic drive motor, which is drivingly coupled to the line drum. The drive motor is supplied with hydraulic fluid via a hydraulic pump, preferably a hydraulic control pump.

Gemäß der Erfindung umfasst die erfindungsgemäße Antriebsanordnung weiterhin eine Stelleinrichtung zur Veränderung des Drucks der dem Antriebsmotor von der Hydraulikpumpe zugeführten Hydraulikflüssigkeit, die ein elektrisch ansteuerbares Proportionalventil aufweist, welches durch eine elektronische Steuerungs- und Regelungseinrichtung in Abhängigkeit von den Signalen eines mit der Leitungstrommel gekoppelten Drehwinkelgebers, der die momentane Winkelposition der Leitungstrommel ermittelt, in der Weise angesteuert wird, dass der Antriebsmotor die Leitungstrommel bei abgewickelter Leitungstrommel mit einem niedrigen Drehmoment und bei aufgewickelter Leitungstrommel mit einem hohen Drehmoment beaufschlagt.According to the invention, the drive assembly according to the invention further comprises an adjusting device for varying the pressure of the hydraulic fluid supplied to the drive motor from the hydraulic pump, which has an electrically controllable proportional valve, which by an electronic control and regulating device in response to the signals of a coupled with the line drum rotary encoder, which determines the instantaneous angular position of the line drum, is controlled in such a way that the drive motor acts on the line drum in unwound cable drum with a low torque and wound coil cable drum with a high torque.

Das Proportionalventil sorgt hierbei in Abhängigkeit von den Signalen der Steuerungseinrichtung für eine Anpassung des Drucks, und damit des vom hydraulischen Antriebsmotor ausgeübten Drehmoments, wobei es auf Grund der nachfolgend noch näher beschriebenen Regelung des Volumens der dem Antriebsmotor zugeführten Menge an Hydraulikflüssigkeit lediglich zu einem Rückfluss von sehr geringen Hydraulikölmengen über eine mit dem Proportionalventil verbundene Rücklaufleitung kommt, da beispielsweise bei stehendem Hydraulikantrieb ein Druckverlust von lediglich wenigen Tropfen in der Leitung bereits eine deutliche Reduzierung des Leitungsdrucks - und damit des Drehmoments - bewirkt.The proportional valve in this case provides in dependence on the signals of the control device for an adjustment of the pressure, and thus of the force exerted by the hydraulic drive motor torque, it being due to the below described in more detail control of the volume of the drive motor supplied amount of hydraulic fluid only to a reflux of very small amounts of hydraulic oil via a connected to the proportional valve return line comes because, for example, when the hydraulic drive a pressure drop of only a few drops in the line already a significant reduction in line pressure - and thus the torque - causes.

Gemäß der bevorzugten Ausführungsform der Erfindung ist die Hydraulikpumpe eine über einen mit im Wesentlichen konstanter Drehzahl laufenden elektrischen Antriebsmotor angetriebene Regelpumpe, vorzugsweise eine Axialkolbenpumpe, bei der das Fördervolumen durch Verändern des Neigungswinkels einer in der Pumpe enthaltenen umlaufenden Scheibe veränderbar ist, die einen oder mehrere Pumpenkolben zur Förderung der Hydraulikflüssigkeit betätigt. Hierdurch ergibt sich der Vorteil, dass der zugehörige elektrische Antriebsmotor mit konstanter Drehzahl laufen kann, und bei einer Absenkung der benötigten Antriebsleistung für den hydraulischen Antriebsmotor, beispielsweise wenn der zugehörige Kran zum Stillstand kommt, lediglich der Neigungswinkel der Scheibe geändert wird, so dass das Pumpenvolumen theoretisch auf Null reduziert wird, und somit überhaupt gar keine Antriebsleistung benötigt wird. Anders ausgedrückt läuft die Pumpenscheibe in der Pumpe 01, ohne die Kolben zu bewegen, wodurch die Aufheizung der Hydraulikflüssigkeit in vorteilhafter Weise erheblich reduziert wird.According to the preferred embodiment of the invention, the hydraulic pump is a variable displacement driven via a substantially constant speed electric drive motor, preferably an axial piston pump, wherein the delivery volume is variable by changing the inclination angle of a contained in the pump rotating disc, the one or more pump piston operated to promote the hydraulic fluid. This results in the advantage that the associated electric drive motor can run at a constant speed, and at a reduction in the required drive power for the hydraulic drive motor, for example, when the associated crane comes to a standstill, only the inclination angle of the disc is changed, so that the pump volume theoretically reduced to zero, and thus no driving power is needed at all. In other words, the pump disk runs in the pump 01, without moving the piston, whereby the heating of the hydraulic fluid is advantageously reduced considerably.

Der mit konstanter Drehzahl laufende elektrische Antriebsmotor ist hierbei vorzugsweise ein bekannter Drehstrom-Elektromotor, der in bekannter Weise mit einer Drehzahl von 50 Hz umläuft. Durch die erfindungsgemäße Kombination eines solchen Drehstrom-Elektromotors mit einer von diesem angetriebenen Regelpumpe ergibt sich der Vorteil, dass gegenüber bekannten Einrichtungen lediglich ein Bruchteil der Motorleistung zur Aufheizung der Hydraulikflüssigkeit herangezogen wird, insbesondere, wenn sich die Leitungstrommel in Ruhe befindet, und der Antriebsmotor lediglich ein Haltemoment zum Spannen der Versorgungsleitung aufbringen muss.The running at a constant speed electric drive motor is in this case preferably a known three-phase electric motor, which rotates in a known manner at a speed of 50 Hz. The inventive combination of such a three-phase electric motor with a driven by this control pump has the advantage that compared to known devices only a fraction of the engine power is used to heat the hydraulic fluid, especially when the cable drum is at rest, and the drive motor only must apply a holding torque for tensioning the supply line.

Der Hauptelektromotor treibt ebenfalls über vorzugsweise die gleiche Antriebswelle eine weitere Pumpe an, die eine Konstantpumpe ― d.h. eine Pumpe mit konstantem Fördervolumen - ist, welche in erfindungsgemäßer Weise den Hydraulikdruck zum Lösen einer Bremseinrichtung zum Abbremsen und Fixieren der Leitungstrommel, vorzugsweise einer Hydraulik-Lamellenbremse mit einem maximal begrenztem Haltemoment, löst, wenn die Pumpe den Druck bereitstellt.The main electric motor also drives preferably via the same drive shaft to another pump, which is a fixed displacement pump - ie a pump with constant displacement - which in accordance with the invention the hydraulic pressure to release a braking device for braking and fixing the cable drum, preferably one Hydraulic multi-disc brake with a maximum limited holding torque, releases when the pump provides the pressure.

Durch den Einsatz einer hydraulisch betätigten Bremse ergibt sich der Vorteil, dass im Falle eines Ausfallens der elektrischen Steuerungseinrichtung oder im Falle des Platzens eines Hydraulikschlauches die Stromzuführungstrommel nicht durch die herabgleitende Versorgungsleitung in schnelle Rotation versetzt werden kann, und dann nach dem Leerlaufen der Trommel infolge der mitunter beachtlichen Rotationsenergie der Leitungstrommel die Versorgungsleitung am Ende der Zuführungstrommel abschert.
Die elektronische Steuerungseinrichtung ist vorzugsweise eine speicherprogrammierbare Steuerung, die einen Speicher umfasst, in dem der Drehwinkel der Leitungstrommel - der über einen mit der Leitungstrommel gekoppelten digitalen Drehwinkelgeber oder ein Potentiometer oder dergleichen bestimmt wird - zusammen mit einem zugehörigen Vorgabewert für den Druck bzw. für eine dem Druck entsprechende Spannung in einem Kennfeld abgelegt ist, welche dem Proportionalventil als Stellsignal zugeführt wird.The use of a hydraulically operated brake has the advantage that in the event of failure of the electrical control device or in the case of bursting of a hydraulic hose, the power supply drum can not be put into rapid rotation by the down sliding supply line, and then after the emptying of the drum due to sometimes considerable rotational energy of the line drum shears the supply line at the end of the feed drum.
The electronic control device is preferably a programmable logic controller comprising a memory in which the rotation angle of the line drum - which is determined via a coupled to the line drum rotary digital encoder or a potentiometer or the like - together with an associated default value for the pressure or for a the pressure corresponding voltage is stored in a map, which is supplied to the proportional valve as a control signal.

Bei der bevorzugten Ausführungsform der Erfindung ändert sich hierbei der durch die Spannung des Stellsignals bestimmte Druck in der Zuleitung zum Antriebsmotor in Abhängigkeit vom Drehwinkel im Wesentlichen entlang einer Geraden, wobei in vorteilhafter Weise bei kleinen Drehwinkeln (nahezu abgewickelte Leitungstrommel) ein gegenüber einem linearen Anstieg überhöhtes höheres Drehmoment bereitgestellt wird.In the preferred embodiment of the invention, in this case the pressure in the supply line to the drive motor determined by the voltage of the actuating signal essentially changes along a straight line as a function of the angle of rotation, wherein advantageously at small angles of rotation (almost unwound line drum) an overstated linear increase occurs higher torque is provided.

In gleicher Weise besteht die Möglichkeit, zusätzlich die Geschwindigkeit der Leitungstrommel, beispielsweise durch zeitliches Ableiten des Drehwinkelsignals oder durch einen Absolutmesswertgeber, zu messen, und den hierzu optimalen Spannungswert für das Proportionalventil zusammen mit dem zugehörigen Drehwinkel in einem Kennfeld abzulegen, wobei die Spannungswerte bei vorgegebenem Drehwinkel und vorgegebener Geschwindigkeit vorzugsweise ebenfalls empirisch bestimmt werden.In the same way, it is also possible to measure the speed of the line drum, for example, by time derivative of the rotation angle signal or by an absolute transducer, and store the optimal voltage value for the proportional valve together with the associated rotation angle in a map, the voltage values at a given Rotation angle and predetermined speed preferably also be determined empirically.

Durch die erfindungsgemäße Vorrichtung ergibt sich der Vorteil, dass die Lebensdauer der eingesetzten Versorgungsleitungen beachtlich gesteigert werden kann, die bei Stromzuleitungen z.B. im Bereich von 100.000 Auf- und Abwickel-Zyklen liegt.By the device according to the invention there is the advantage that the life of the supply lines used can be considerably increased, which is in power supply lines, for example in the range of 100,000 winding and unwinding cycles.

Gegenüber elektrischen Antrieben ergibt sich zudem noch der Vorteil, dass der eingesetzte Hydraulikantriebsmotor im Falle eines Blockierens der Leitungstrommel, beispielsweise durch eine mechanische Störung, nicht zu einem überhöhten Drehmoment, beispielsweise um den Faktor 3 bis 8, auf die Leitungstrommel einwirkt, wodurch es zu einem erhöhten Verschleiß der Leitungen beim Anfahren, bzw. sogar einem Reißen der Versorgungsleitungen kommen kann.Compared to electric drives also results in the advantage that the hydraulic drive motor used in the case of blocking the cable drum, for example by a mechanical failure, not to an excessive torque, for example by a factor of 3 to 8, acting on the line drum, making it a increased wear of the lines when starting, or even a tearing of the supply lines can come.

Die Erfindung wird nachfolgend mit Bezug auf die Zeichnungen beschrieben. In den Zeichnungen zeigen:

Fig. 1
eine schematische Darstellung der erfindungsgemäßen hydraulischen Antriebsanordnung mit den wesentlichen Komponenten, und
Fig. 2
ein Beispiel für eine erste und zweite in der elektronischen Steuerungs- und Regelungseinrichtung der erfindungsgemäßen Anordnung abgelegte Kurve für den Drehwinkel der Leitungstrommel und das vom Antriebsmotor erzeugte Drehmoment.
The invention will be described below with reference to the drawings. In the drawings show:
Fig. 1
a schematic representation of the hydraulic drive assembly according to the invention with the essential components, and
Fig. 2
an example of a first and second stored in the electronic control and regulating device of the inventive arrangement curve for the rotation angle of the line drum and the torque generated by the drive motor.

Wie in Fig. 1 gezeigt ist, umfasst eine hydraulische Antriebsanordnung 1 zum Antrieb einer Leitungstrommel 2 eines nicht näher dargestellten fahrbaren Verbrauchers, insbesondere eines Krans, einen hydraulischen Antriebsmotor 4, der die Leitungstrommel 2 über eine Welle 6 antreibt.As in Fig. 1 1, a hydraulic drive arrangement 1 for driving a line drum 2 of a mobile consumer (not shown in detail), in particular a crane, comprises a hydraulic drive motor 4 which drives the line drum 2 via a shaft 6.

Die Leitungstrommel 2 ist hierbei bevorzugt eine monospiralige Leitungstrommel, das heißt eine Leitungstrommel, auf der die mit einem Festanschluss 8 verbundene Versorgungsleitung 10 lediglich in einer Ebene aufgewickelt wird.The cable drum 2 here is preferably a monospiral cable drum, that is to say a cable drum, on which the supply line 10 connected to a permanent connection 8 is wound up only in one plane.

Wie der Darstellung von Fig. 1 weiterhin entnommen werden kann, wird der Antriebsmotor 4 über eine Zufuhrleitung 12 durch eine Hydraulikpumpe 14 angetrieben, die in vorteilhafter Weise als eine hydraulische Regelpumpe ausgestaltet ist, welche von einem mit im Wesentlichen konstanter Drehzahl laufenden Elektromotor 16 angetrieben wird, und deren Fördermenge an Hydraulikflüssigkeit in Abhängigkeit vom Druck in der Zuleitung 12 zum Antriebsmotor 4 geregelt wird, derart, dass bei einem Abfallen des Drucks in der Zuleitung 12, beispielsweise beim Anlaufen des Motors 4, die geförderte Menge an Hydraulikflüssigkeit erhöht wird, und umgekehrt.Like the presentation of Fig. 1 can be removed, the drive motor 4 is driven via a supply line 12 by a hydraulic pump 14, which is configured in an advantageous manner as a hydraulic control pump, which of a with in Essentially constant speed running electric motor 16 is driven, and whose flow rate of hydraulic fluid is controlled in response to the pressure in the supply line 12 to the drive motor 4, such that at a drop in pressure in the supply line 12, for example when starting the engine 4, the subsidized Amount of hydraulic fluid is increased, and vice versa.

Die von der Hydraulikpumpe 14 bereitgestellte Hydraulikflüssigkeit wird zuerst bevorzugt einem Druckbegrenzungsventil 18 zugeführt, dessen maximaler Druckwert von z.B. 160 bar sich vorzugsweise manuell einstellen lässt, und welches beim Überschreiten des maximalen Druckwertes die Hydraulikflüssigkeit unmittelbar in den Vorratsbehälter 20 einleitet, um den Motor 4 beispielsweise im Falle eines störungsbedingten Blockierens nicht zu beschädigen.The hydraulic fluid provided by the hydraulic pump 14 is first preferably fed to a pressure relief valve 18 whose maximum pressure value is e.g. 160 bar preferably can be set manually, and which, when the maximum pressure value is exceeded, introduces the hydraulic fluid directly into the reservoir 20 in order not to damage the engine 4, for example in the event of a malfunctioning blocking.

Stromaufwärts des Druckbegrenzungsventils 18 ist ein erstes Stellventil 22 angeordnet, welches über eine nicht näher bezeichnete elektrische Verbindungsleitung mit einer elektronischen Steuerungs- und Regelungseinrichtung 24 verbunden ist, welche das erste Stellventil - bevorzugt ein einfaches Auf-/Zu-Ventil ― öffnet, wenn die elektronische Steuerungs- und Regelungseinrichtung 24 beispielsweise von der Antriebssteuerung des Hauptantriebsmotors des verfahrbaren Verbrauchers das Signal erhält, dass der Verbraucher sich in Bewegung setzt.Upstream of the pressure limiting valve 18, a first control valve 22 is arranged, which is connected via an unspecified electrical connection line with an electronic control and regulating device 24, which opens the first control valve - preferably a simple on / off valve - when the electronic Control and regulating device 24, for example, receives from the drive control of the main drive motor of the movable consumer, the signal that the consumer is set in motion.

Dem ersten Stellventil 22 nachgeordnet kann in der Zufuhrleitung 12 weiterhin ein Drucksensor 26 angeordnet sein, der ebenfalls über eine nicht näher bezeichnete elektrische Leitung mit der elektronischen Steuerungs- und Regelungseinrichtung 24 verbunden ist, und durch den die elektronische Steuerungs- und Regelungseinrichtung überwacht, ob der Druck in der Zuleitung 12 einen vorzugsweise vorgebbaren minimalen Wert überschreitet.
Sofern dieser minimale Vorgabewert unterschritten wird, wird dies von der elektronischen Steuerungs- und Regelungseinrichtung 24 als eine Störung in der Zuleitung 12 erkannt, die darauf hin deutet, dass ein störungsbedingter Verlust an Hydrauliköl, beispielsweise durch einen geplatzten Schlauch, auftritt. In diesem Falle werden von der elektronischen Steuerungs- und Regelungseinrichtung vorzugsweise sämtliche Ventile geschlossen, sowie der Elektromotor 16 abgeschaltet.Downstream of the first control valve 22, a pressure sensor 26 may be arranged in the supply line 12, which is also connected via an unspecified electrical line to the electronic control and regulation device 24, and monitored by the electronic control and regulating device, whether the Pressure in the supply line 12 exceeds a preferably predetermined minimum value.
If this minimum preset value is undershot, this is detected by the electronic control and regulation device 24 as a fault in the supply line 12, which indicates that a failure-induced loss of hydraulic oil, for example due to a burst hose, occurs. In this case, preferably all valves are closed by the electronic control and regulating device, and the electric motor 16 is turned off.

Stromaufwärts des Drucksensors 26 sind in der Zuleitung 12 erfindungsgemäß ein erstes und ein zweites hydraulisch entsperrbares Ventil 28 und 30 angeordnet, zwischen denen sich ein durch die elektronische Steuerungs- und Regelungseinrichtung 24 angesteuertes Proportionalventil 32 befindet, welches den Druck in der Zuleitung 12 in Abhängigkeit von den Signalen der elektronischen Steuerungs- und Regelungseinrichtung verändert. Stromaufwärts des zweiten hydraulisch entsperrbaren Ventils 30 ist die Zuleitung 12 vorzugsweise unmittelbar mit dem Antriebsmotor 4 verbunden, wobei zur Verhinderung von Druckstößen infolge eines Überschwingens des Antriebsmotors 4 die Zuleitung 12 und die zum ersten Stellventil 22, bzw. zum Vorratsbehälter 20 zurückführende Rücklaufleitung 34 vorzugsweise über ein bekanntes Schockventil 36 verbunden sind.Upstream of the pressure sensor 26, a first and a second hydraulically releasable valve 28 and 30 are arranged in the supply line 12, between which a controlled by the electronic control and regulating device 24 proportional valve 32 which the pressure in the supply line 12 as a function of the signals of the electronic control and regulating device changed. Upstream of the second hydraulically releasable valve 30, the supply line 12 is preferably connected directly to the drive motor 4, wherein to prevent pressure surges due to overshoot of the drive motor 4, the supply line 12 and the first control valve 22, and to the reservoir 20 returning return line 34 preferably over a known shock valve 36 are connected.

Wie der Darstellung von Fig. 1 weiterhin entnommen werden kann, sind die beiden hydraulisch entsperrbaren Ventile 28 und 30 sowie das Proportionalventil 32 durch eine hydraulische Bypass-Leitung 38 überbrückbar, in der vorzugsweise ein manuell betätigbares Stellventil 40 angeordnet ist, mit dem beim Ausfall der elektronischen Steuerungs- und Regelungseinrichtung ein Notbetrieb der erfindungsgemäßen hydraulischen Antriebsanordnung 1 möglich ist, beispielsweise, um den fahrbaren Verbraucher manuell verfahren zu können. Hierzu wird das Drehmoment, welches der Antriebsmotor 4 auf die Leitungstrommel 2 ausübt, vorzugsweise über das Druckbegrenzungsventil 18 auf einen mittleren Wert eingestellt.Like the presentation of Fig. 1 can be removed, the two hydraulically releasable valves 28 and 30 and the proportional valve 32 can be bridged by a hydraulic bypass line 38, in which preferably a manually operable control valve 40 is arranged, with the failure of the electronic control and regulating device emergency operation the hydraulic drive assembly 1 according to the invention is possible, for example, to be able to manually move the mobile consumer. For this purpose, the torque exerted by the drive motor 4 on the line drum 2, preferably via the pressure relief valve 18 is set to an average value.

Wie der Darstellung von Fig. 1 weiterhin entnommen werden kann, umfasst die erfindungsgemäße Anordnung 1 eine weitere hydraulische Pumpe 42, die vorzugsweise durch den gleichen Motor 16 wie die hydraulische Pumpe 14 angetrieben wird, die jedoch im Gegensatz zur Pumpe 14 eine Konstantpumpe ist, das heißt eine Pumpe mit konstantem Fördervolumen, die einen gegenüber der Pumpe 14 geringeren Druck und auch eine geringere Fördermenge an Hydraulikflüssigkeit bereitstellt. Die weitere Pumpe 42 ist über eine weitere Zuleitung 44 und ein zweites Stellventil 46 - vorzugsweise ein durch die elektronische Steuerungs- und Regelungseinrichtung 24 angesteuertes einfaches Auf-/Zu-Ventilmit einer hydraulisch deaktivierbaren Bremseinrichtung 48 verbunden, welche vorzugsweise eine bekannte Lamellenbremse ist, die im Falle einer drucklosen weiteren Zuleitung 44 betätigt wird, um eine uneingeschränkte Drehung der Leitungstrommel 2 durch die Gewichtskraft der Versorgungsleitung 10 beim Ausfall der elektrischen Stromversorgung oder eines Druckverlustes zu verhindern.Like the presentation of Fig. 1 can be taken, the inventive arrangement 1 comprises a further hydraulic pump 42 which is preferably driven by the same motor 16 as the hydraulic pump 14, but in contrast to the pump 14 is a fixed displacement pump, that is a pump with a constant displacement, the one opposite to the pump 14 provides lower pressure and also a lower flow rate of hydraulic fluid. The further pump 42 is connected via a further supply line 44 and a second control valve 46 - preferably a controlled by the electronic control and regulating device 24 simple on / off valve with a hydraulically deactivatable brake device 48, which is preferably a known multi-disc brake, the Case of a pressureless further supply line 44 is operated to prevent unrestricted rotation of the cable drum 2 by the weight of the supply line 10 in case of failure of the electric power supply or a pressure loss.

Die Bremseinrichtung 48 erzeugt hierbei im betätigten Zustand ein Bremsmoment oder Drehmoment, welches ein Leerlaufen der Leitungstrommel 2 zuverlässig verhindert, welches jedoch unterhalb des Drehmomentwertes liegt, der bei vollständig abgewickelter Leitungstrommel zu einer Zugkraft in der Versorgungsleitung 10 führt, die den maximal zulässigen Wert für die jeweilige Leitung überschreitet.The braking device 48 generates in the actuated state, a braking torque or torque, which reliably prevents idling of the cable drum 2, which, however, is below the torque value, which leads at fully unwound cable drum to a tensile force in the supply line 10, the maximum allowable value for the exceeds the respective line.

Gemäß der Darstellung von Fig. 1 ist die weitere Zuleitung 44 ebenfalls strömungsmäßig mit einem dritten Stellventil 50 verbunden, das in erfindungsgemäßer Weise ebenfalls durch die elektronische Steuerungs- und Regelungseinrichtung 24 angesteuert wird, und das die Zuleitung 52 zum ersten und zum zweiten hydraulisch entsperrbaren Ventil 28, 30 mit Druck aus der weiteren Hydraulikpumpe 42 beaufschlagt. Hierdurch ergibt sich in erfindungsgemäßer Weise der Vorteil, dass erst durch Beaufschlagen der beiden Ventile 28 und 30 das Proportionalventil 32 überhaupt aktiviert wird, so dass im Falle einer Störung des Proportionalventils 32, bzw. der elektronischen Steuerungs- und Regelungseinrichtung 24, die Zuleitung 12 geschlossen und dadurch der Antriebsmotor 4 sozusagen hydraulisch gesperrt wird, um einem Leerlaufen der Leitungstrommel 2 durch ein Herabfallen der Versorgungsleitung 10 zusätzlich entgegenzuwirken. Zudem wird erst durch die erfindungsgemäße Anordnung eines mit vergleichsweise niedrigem Druck beaufschlagten ersten und zweiten hydraulisch entsperrbaren Ventils 28, 30 stromaufwärts und stromabwärts des Proportionalventils sichergestellt, dass auch im Falle eines vollständigen Ausfalls der elektronischen Steuerungs- und Regelungseinrichtung 24 ein Notbetrieb über das Ventil 40, bzw. das Druckbegrenzungsventil 18 überhaupt noch möglich ist.As shown by Fig. 1 the other supply line 44 is also fluidly connected to a third control valve 50 which is also driven in accordance with the invention by the electronic control and regulating device 24, and the supply line 52 to the first and second hydraulically releasable valve 28, 30 with pressure from the another hydraulic pump 42 acted upon. This results in the inventive manner the advantage that only by applying the two valves 28 and 30, the proportional valve 32 is activated at all, so that in case of failure of the proportional valve 32, and the electronic control and regulating device 24, the supply line 12 is closed and thus the drive motor 4 is hydraulically locked so to speak, in order to additionally counteract an idling of the line drum 2 by a drop of the supply line 10. In addition, it is only ensured by the inventive arrangement of a comparatively low pressure applied first and second hydraulically releasable valve 28, 30 upstream and downstream of the proportional valve that even in the event of complete failure of the electronic control and regulation device 24, an emergency operation via the valve 40, or the pressure relief valve 18 is still possible.

Gemäß der Erfindung ist die Leitungstrommel 2 mit einem Drehwinkelgeber 60 gekoppelt, der der elektronischen Steuerungs- und Regelungseinrichtung 24 ein dem jeweiligen Drehwinkel der Leitungstrommel 2 entsprechendes Drehwinkelsignal zuführt.According to the invention, the line drum 2 is coupled to a rotary encoder 60 which supplies the electronic control and regulation device 24 with a rotational angle signal corresponding to the respective angle of rotation of the line drum 2.

Die elektronische Steuerungs- und Regelungseinrichtung 24 ist vorzugsweise eine speicherprogrammierbare Steuerung, die einen Speicher 62 enthält, in dem die den jeweiligen Drehwinkeln a der Leitungstrommel 2 zugeordneten Werte für das Drehmoment T und/oder das Stellsignal, welches dem Proportionalventil 32 zugeführt wird, abgelegt sind. Sofern im Zusammenhang mit der Erfindung von einem auf die Leitungstrommel 2 ausgeübten Drehmoment T gesprochen wird, bedeutet dies, dass die Leitungstrommel 2 durch den Antriebsmotor 4 stets in der Aufwickelrichtung der Leitungstrommel 2 mit einem Drehmoment beaufschlagt wird, dessen Wert auch beim Abwickeln der Leitungstrommel 2 durch den hierbei in Gegenrichtung drehenden Antriebsmotor 4 ebenfalls bereitgestellt wird. Die elektronische Steuerungs- und Regelungseinrichtung 24 kann hierzu einen nicht dargestellten Mikroprozessor umfassen, der die elektrischen Stellsignale für das Proportionalventil 32 aus den elektrischen Signalen des Drehwinkelgebers 60 bestimmt.The electronic control and regulation device 24 is preferably a programmable logic controller which contains a memory 62 in which the values associated with the respective rotation angles a of the line drum 2 for the torque T and / or the control signal which is supplied to the proportional valve 32 are stored , If in the context of the invention of a force exerted on the line drum 2 torque T is spoken, this means that the line drum 2 is always acted upon by the drive motor 4 in the winding direction of the cable drum 2 with a torque whose value is also when unwinding the cable drum. 2 is also provided by the here in the opposite direction rotating drive motor 4. The electronic control and regulating device 24 may for this purpose comprise a microprocessor, not shown, which determines the electrical control signals for the proportional valve 32 from the electrical signals of the rotary encoder 60.

Hierzu können in dem Speicher 62 die in der Fig. 2 gezeigten Werte für den Drehwinkel ai und das zugehörige Drehmoment Ti als Wertepaare abgelegt sein, die vorzugsweise empirisch bestimmt und von der elektronischen Steuerungs- und Regelungseinrichtung im Speicher 62 abgelegt werden.For this purpose, in the memory 62 in the Fig. 2 shown values for the rotation angle a i and the associated torque T i be stored as value pairs, which are preferably determined empirically and stored by the electronic control and regulating device in the memory 62.

Wie der Fig. 2 hierbei zu entnehmen ist, liegen die Wertepaare ai ,Ti für das Drehmoment und den Drehwinkel vorzugsweise im Wesentlichen auf einer Geraden 70, wobei der minimale Wert für den Drehwinkel amin vorzugsweise durch eine Kalibration des Drehwinkelgebers 60 ermittelt wird, und der vollständig abgewickelten Leitungstrommel entspricht.Again Fig. 2 In this case, the value pairs a i , T i for the torque and the angle of rotation are preferably substantially on a straight line 70, wherein the minimum value for the rotation angle a min is preferably determined by a calibration of the rotary encoder 60, and the completely unwound Cable drum corresponds.

Wie der Darstellung von Fig. 2 weiterhin entnommen werden kann, besteht gemäß einer weiteren vorteilhaften Ausführungsform der Erfindung die Möglichkeit, dass das Drehmoment T, bzw. die diesem entsprechenden elektrischen Stellsignale für das Proportionalventil 32 gemäß der Kurve 72 bei kleinen Wickeldurchmessern im Bereich von amin gegenüber einem linearen Anstieg überhöht sind, um dem Erfordernis einer erhöhten Winkelbeschleunigung der Leitungstrommel 2 bei kleinen Wickeldurchmessern Rechnung zu tragen, die zum Erhalt einer im Wesentlichen konstanten Zugspannung in der Versorgungsleitung 10 dadurch bedingt ist, dass bei kleinen Wickeldurchmessern die Leitungstrommel 2 innerhalb des gleichen Zeitintervalls auf eine erhöhte Drehzahl/Winkelgeschwindigkeit beschleunigt werden muss, um dieselbe Aufwickelgeschwindigkeit zu erhalten, wie bei großen Wickeldurchmessern.Like the presentation of Fig. 2 Furthermore, according to a further advantageous embodiment of the invention, there is the possibility that the torque T, or the corresponding electrical control signals for the proportional valve 32 according to the curve 72 at small winding diameters in the range of amin over a linear increase are excessive, in order to take account of the requirement of increased angular acceleration of the line drum 2 with small winding diameters, which is due to maintaining a substantially constant tensile stress in the supply line 10 that at small winding diameters, the line drum 2 within the same time interval to an increased speed / angular velocity must be accelerated to obtain the same winding speed, as with large winding diameters.

Hierbei kann gemäß einer weiteren Ausführungsform der Erfindung in gleicher Weise auch die Drehrichtung der Leitungstrommel 2 von der elektronischen Steuerungs- und Regelungseinrichtung 24 mit berücksichtigt werden, derart, dass die Überhöhung der Drehmomentwerte gemäß der Kurve 72 nur beim Aufwickeln berücksichtigt wird, beim Abwickeln hingegen die auf der Geraden 70 angeordneten Werte zur Ansteuerung des Proportionalventils 32 herangezogen werden.In this case, according to a further embodiment of the invention in the same way, the direction of rotation of the cable drum 2 by the electronic control and regulating device 24 are taken into account, such that the increase in torque values according to the curve 72 is taken into account only during winding, while the unwinding the arranged on the straight line 70 values are used to control the proportional valve 32.

In diesem Zusammenhang kann es weiterhin vorgesehen sein, dass der Anstieg des Drehmoments T in Abhängigkeit vom Drehwinkel a zusätzlich in Abhängigkeit von der jeweiligen Drehzahl der Leitungstrommel 2 verändert wird, insbesondere die Überhöhung des Drehmoments T bei niedrigen Drehwinkeln. Hierzu kann der Speicher 62 als bekanntes Kennfeld ausgestaltet sein, in dem Wertepaare für den Drehwinkel ai, das Drehmoment Ti und die zugehörige Geschwindigkeit der Leitungstrommel 2 abgelegt sind, die zur Ansteuerung des Proportionalventils 32 verwendet werden.In this context, it can furthermore be provided that the increase in the torque T as a function of the rotation angle α is additionally changed as a function of the respective rotational speed of the line drum 2, in particular the increase in the torque T at low angles of rotation. For this purpose, the memory 62 may be configured as a known characteristic map, in which value pairs for the rotation angle a i , the torque T i and the associated speed of the line drum 2 are stored, which are used to drive the proportional valve 32.

Claims (14)

  1. Cable reel (2) for a mobile consumer, in particular a crane, with a hydraulic drive arrangement (1) comprising a hydraulic drive motor (4), whose drive is connected to the cable reel (2), a hydraulic pump (14) as a supply source of hydraulic fluid at high pressure and an adjusting device to vary the pressure of the hydraulic fluid fed to the drive motor (4) by the hydraulic pump (14),
    characterised in that
    the adjusting device comprises an electrically controllable proportional valve (32), that the angular position (αi) of the cable reel (2) is acquired by an angular transducer (60), and that an electronic open-loop and closed-loop control device (24) is provided which controls the proportional valve (32) in relation to the signals from the angular transducer (60) such that, as the cable reel (2) is unwinding, the drive motor (4) applies a low torque (T), and, as the cable reel is winding in, the drive motor applies a high torque (T).
  2. Cable reel in accordance with claim 1,
    characterised in that
    the proportional valve (32) is connected to the hydraulic drive motor (4) by means of a feed line (12) and that, in the feed line (12), a first and second hydraulically pilot-controlled valve (28, 30) are arranged upstream and downstream of the proportional valve (32).
  3. Cable reel in accordance with claim 2,
    characterised in that
    the hydraulically pilot-controlled valve (28, 30) and the proportional valve (32) can be bypassed by a manually-operated valve (40) by means of a hydraulic bypass line (38).
  4. Cable reel in accordance with one of the preceding claims,
    characterised in that
    the hydraulic pump (14) is a hydraulic control pump whose delivery volume is varied in relation to the pressure of the hydraulic fluid delivered to the hydraulic drive motor (4).
  5. Cable reel in accordance with one of the preceding claims,
    characterised in that
    the control device comprises a first control valve (18), in particular an on/off valve, actuated by the electronic open-loop and closed-loop control device (24), by means of which valve the hydraulic drive motor (4) can be connected fluidically with the hydraulic pump (14).
  6. Cable reel in accordance with one of the preceding claims,
    characterised in that
    a further hydraulic pump (42), in particular an internal gear pump, is provided which delivers hydraulic fluid at low pressure.
  7. Cable reel in accordance with claim 4 and 6,
    characterised in that
    the hydraulic pump (14) and the further hydraulic pump (42) are driven by a common motor (16), in particular an electric motor.
  8. Cable reel in accordance with one of the preceding claims,
    characterised in that
    the cable reel (2) is connected with a brake device (48), in particular a disk brake, which can be released by applying hydraulic pressure against the force action of spring-elastic means.
  9. Cable reel in accordance with claim 6 and 8,
    characterised in that
    the control device comprises a second control valve (46), in particular an on/off valve, actuated by the electronic open-loop and closed-loop control device (24), by means of which valve the brake device (48) can be connected fluidically with the further hydraulic pump (42) to release the brake device.
  10. Cable reel in accordance with claim 2 and 6,
    characterised in that
    the control device comprises a third control valve (50), in particular an on/off valve, actuated by the electronic open-loop and closed-loop control device (24), by means of which valve the first and second hydraulic pilot-operated valve (28, 30) can be connected fluidically with the further hydraulic pump (42).
  11. Cable reel in accordance with one of the preceding claims,
    characterised in that
    the electronic open-loop and closed-loop control device (24) comprises an electronic storage device (62) in which the values for the torque (Ti) associated with a rotational angle (αi) of the cable reel (2) and/or the electronic values associated with the electrical signals from the angular transducer (60) for the set point signal which is applied to the proportional valve (32) are stored.
  12. Cable reel in accordance with one of the preceding claims,
    characterised in that
    during the winding-in of the cable reel (2), the electronic open-loop and closed-loop control device (24) increases the torque applied by the hydraulic drive motor (4) to the cable reel (2) essentially linearly (70) in relation to the coil diameter.
  13. Cable reel in accordance with claim 12,
    characterised in that
    the electronic open-loop and closed-loop control device (24) increases the torque (T) applied by the hydraulic drive motor (4) to the cable reel (2) beyond the linear slope (70) in the range of rotational angles (αi) which corresponds essentially to an unwound cable reel (2).
  14. Cable reel in accordance with one of the preceding claims,
    characterised in that
    the electronic open-loop and closed-loop control device (24) controls the torque (T) applied by the hydraulic drive motor (4) to the cable reel (2) additionally in relation to the particular rotational speed of the cable reel (2) at any given time.
EP05022313A 2004-10-19 2005-10-13 Cable drum with hydraulic drive arrangement Not-in-force EP1666402B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004051094A DE102004051094A1 (en) 2004-10-19 2004-10-19 Hydraulic drive arrangement for driving cable reel has servo unit which has electrically controlled proportion valve whereby rotation angle position of cable reel is recorded by rotary input type encoder

Publications (2)

Publication Number Publication Date
EP1666402A1 EP1666402A1 (en) 2006-06-07
EP1666402B1 true EP1666402B1 (en) 2010-06-30

Family

ID=35636853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05022313A Not-in-force EP1666402B1 (en) 2004-10-19 2005-10-13 Cable drum with hydraulic drive arrangement

Country Status (3)

Country Link
EP (1) EP1666402B1 (en)
AT (1) ATE472506T1 (en)
DE (2) DE102004051094A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101876829B (en) * 2009-04-29 2011-12-21 重庆川仪自动化股份有限公司 Method for improving control accuracy of locator
DE102010015624B4 (en) * 2010-04-19 2013-10-10 Stemmann-Technik Gmbh Method for operating a winding drum and winding drum
CN102225729B (en) * 2011-03-31 2013-01-02 三一重型装备有限公司 Engineering machine and hydraulic control system for cable drum test-bed thereof
DE102012010266B4 (en) * 2012-05-25 2015-02-12 Wessel-Hydraulik Gmbh Hydraulic circuit arrangement
DE102015003581A1 (en) * 2015-03-19 2016-09-22 Siemag Tecberg Gmbh Disc brake device with speed-controlled electric drive
DE102019122956A1 (en) * 2019-08-27 2021-03-18 J.D. Neuhaus Holding Gmbh & Co. Kg Fluid operated hoist
CN113879903B (en) * 2021-09-22 2024-02-02 江苏徐工工程机械研究院有限公司 Water hose reel system for drainage rescue vehicle, control method and drainage rescue vehicle
CN115535675B (en) * 2022-10-12 2023-07-25 广州多钛克机械科技有限公司 Control method, device and system of water hose storage machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3310311A1 (en) * 1983-03-22 1984-09-27 August Stemmann KG, 4443 Schüttdorf Drive arrangement for a line drum
DD218756A3 (en) * 1983-03-24 1985-02-13 Bondarenko Wjatschislaw HYDROSTATIC CABLE DRUM DRIVE
US4508281A (en) * 1983-08-15 1985-04-02 Tse International Hydraulic drive system for cable stringing apparatus
US4854547A (en) * 1987-08-24 1989-08-08 Harnischfeger Corporation Vehicle-mounted retrieval winch and control means therefor
DE3921679A1 (en) * 1989-07-03 1991-01-17 Stemmann Technik Gmbh Power supply for mains-independent mobile electrical load - has measuring devices for cable tension and drum motor rotor angle, linked to microprocessor and inverter
EP0644147A1 (en) * 1993-09-17 1995-03-22 Siemens Aktiengesellschaft Method and arrangement for tension-controlled winding of a supply line
DE29511722U1 (en) * 1995-07-20 1995-11-02 Hartmann & Koenig Stromzufuehr Drive unit for a cable drum
CA2305482A1 (en) * 2000-04-17 2001-10-17 Del Technologie Automatic cable tension control system for a puller/tensioner machine

Also Published As

Publication number Publication date
EP1666402A1 (en) 2006-06-07
DE102004051094A1 (en) 2006-04-27
DE502005009818D1 (en) 2010-08-12
ATE472506T1 (en) 2010-07-15

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